WO2002032269A1 - Chair - Google Patents

Abstract

A multi functional chair having improved operability for exerting its functions, and having, in order to prevent the assembling and disassembling operations and the construction of the chair from becoming complicated when adjusting sections are dispersed in the case of adjustment thereof, a plurality of operating sections for seat height adjustment, rocking adjustment, etc., wherein two or more operating sections, which are part or all of the operating sections, are adapted to be operated for rotation around respective predetermined rotation axes, the rotation axes of the operating sections being arranged in a line, the two or more operating sections, which are part or all of the operating sections, being arranged in a line, while the chair further comprises an operation receiving section which is a mechanism for directly activating the functions, and a connecting means for connecting the operating sections to the operation receiving section, and wherein part or all of the adjusting sections installed in the connecting means for adjusting the operating range of the operation receiving section which is operated by the operation of the operating sections are concentrated in a predetermined region.

Description

 Specification

Chair Technical Field

 The present invention relates to a chair having a plurality of operation units for performing height adjustment of a back seat, adjustment of locking, and the like. Background art

 In recent years, chairs have become increasingly multifunctional for the purpose of improving sitting comfort and ease of use. For example, a back seat height adjustment function, a locking Z fixed switching function, or a front and rear slide function of the seat are typical examples. An operation unit is provided for each of these functions. Conventionally, these operation units are distributed and appropriately arranged at various positions of the chair.

 However, as a first problem, if the operation units are arranged in a distributed manner as described above, the position of the operation unit cannot be easily understood by some people, and the usability is reduced. You may be dissatisfied with In addition, if chairs become more multifunctional in the future, if the operation units are dispersed and arranged as in the past, the operability will be difficult due to the large number of operation units. Is more likely to occur.

In order to solve the above problem, the present invention relates to a chair having a plurality of operation units for adjusting the height of a back seat, adjusting a rocking position, and the like. Some or all of them are collectively arranged to improve operability, especially in multifunctional chairs. On the other hand, since these mechanisms are provided on the lower surface of the seat and the back side of the back, the operation unit for operating these mechanisms is installed at a position where the occupant can easily operate. In addition, this operation unit is connected to an operation reception unit for directly operating each mechanism via a connection means such as a link wire. Because of such a configuration, in this kind of chair, the operation range of the operation unit and the operation range for operating the mechanism of the operation reception unit match. There is an adjustment section to make it work. Conventionally, such adjustment units are conventionally provided separately in the vicinity of each of the operation reception units.

 However, as a second problem, disposing the adjusting portions in a distributed manner as described above makes it extremely troublesome to perform adjustments during assembly and the like. In addition, when it is usually necessary to cover the adjustment section with some kind of cover, if such adjustment sections are dispersed in various places, a plurality of covers must be provided correspondingly. As a result, not only the assembling and disassembling operations but also structural complications are caused, which is not preferable.

 Therefore, in the present invention, in order to solve the above-mentioned problem, some or all of the adjustment units are collectively arranged in a predetermined area. Disclosure of the invention

In order to solve the first problem described above, the present invention employs a plurality of operations for adjusting the height of the back seat and adjusting the locking. In a chair having a section, some or all of the operation sections are collectively arranged to improve the operability, particularly in a multifunctional chair.

 That is, the chair according to the present invention is a chair having a plurality of operating units for mechanically adjusting the height of the back seat and adjusting the mouth-locking. All or two or more operation units are to be rotated around a predetermined rotation axis, and the rotation axes of each operation unit are arranged on the same axis. This is the feature.

 In such a case, it is possible to collectively arrange the operation units with a simple configuration, for example, by mounting multiple operation units on one rotating shaft. Since the operation mode of each operation unit is the same, the operability can be improved particularly in a multifunctional chair. In addition, it will be possible to provide new ways of using, for example, the simultaneous operation of multiple operating units with one hand.

 In order to further improve the operability, the two or more operation parts are arranged below the side edge of the seat such that their rotation axes extend forward and backward. Is preferred. If the occupant extends his hand downward while sitting down, these are the forces that can naturally touch these controls.

In addition, when two or more operation units are collectively arranged in this way, it becomes difficult to know which operation unit corresponds to which function and how to operate it. This may occur, but in order to avoid this point with a simple structure, the above two or more operations It is desirable to provide unevenness on the surface of the part that can be touched when operating in the predetermined operation direction. If the uneven shape is made different for each operation unit by taking a step further, it will be more preferable in terms of usability.

 Also, in order to promote the common use of parts and to contribute to simplification of manufacturing and cost reduction, the two or more operation parts should have the same shape or substantially the same shape as each other. The following are preferred.

 As a specific embodiment, the two or more operation units are each formed in a plate shape and capable of maintaining a horizontal posture.

 In addition, in order to solve the first problem, the chair according to the present invention has a back seat locking function for interlocking and locking the back seat, and only the back is tilted. Back seat tilting function to move the seat back boundary or to move or deform the seat back boundary, front tilt angle adjustment function to adjust the seat front tilt angle, and back seat It has at least a back-seat elevating function for adjusting the height of the seat, and the operation units for mechanically performing the operations of these functions are arranged and arranged in a predetermined area. Features.

 More specifically, these operation units are arranged in a line in the front-rear direction, and are disposed below the front right edge of the seat. If the seated person extends his / her hand downward while sitting, they can naturally touch these operation units.

In addition, the arrangement order of these operation units is determined by the order in which each of the functions is executed. It is easy for the occupant to understand which operation unit corresponds to which function, based on the arrangement order of the members to be seated, making it easier for the occupant to remember and at the same time to operate it more easily. It is configured as follows. Specifically, the highest priority is to place it in front of the operation unit corresponding to the function that acts on the members below. Next, for members that are almost the same height or that are not clearly related to each other, they are placed in front of the operation unit corresponding to the function to be exerted on the preceding member. I'll do that.

 The member that realizes the backseat elevating function is a gas spring (not shown) attached to the legs, and since it is located at the lowest position, this gas spring must be operated. Operation section is located at the forefront. Next, since a member corresponding to the forward tilt angle adjusting function is mainly a seat, an operation unit for performing the operation is disposed next to the operation unit. Next, since the member corresponding to the backseat boundary portion adjusting function is located at the backseat boundary portion, an operation unit for performing the operation is disposed next to the operation unit. Since the members that support the back-seat locking function and the back-tilt function are mainly the back, the operation part for performing the operation is located at the rear end. .

In addition, these operation parts are assumed to have the same shape or substantially the same shape as each other, so that they can give a sense of unity to improve the appearance and maintain a horizontal posture. However, the operation parts are arranged so that they are at the same height in the state where the horizontal posture is maintained. In addition, on the surface of each operation Unevenness (not shown) is provided at the part to be touched when operating in the operation direction, so that the operation direction can be easily understood by the user.

 Therefore, in such a case, since the operation parts are collectively arranged, the position is easy to understand, and the operability is improved particularly in a multifunctional chair. And can be. Furthermore, it will be possible to provide new ways of using, for example, the simultaneous operation of multiple operating units with one hand.

 Further, in order to solve the second problem, the chair according to the present invention has a plurality of operating mechanisms such as an elevating mechanism for adjusting the height of the back seat and a locking mechanism. In a chair, an operation unit for performing an operation for operating each mechanism, an operation receiving unit that is a mechanism for directly operating each of the mechanisms, and an operating unit and an operation receiving unit are provided. Connecting means for connecting, and adjusting an operation range of an operation receiving unit which operates upon receiving an operation of the operation unit, the adjusting unit being provided in the connecting means. Or at least two or more adjustment units are collectively arranged in a predetermined area.

 In such a case, since the plurality of adjustment units are collectively arranged in the predetermined area, the adjustment units can be adjusted at once, and the time and effort required for adjustment can be saved. Also, it is possible to prevent the assembly work and the like from becoming complicated.

Further, in order to make it easier to understand the correspondence between the operation unit and the adjustment unit, the adjustment unit is provided with an operation unit It is good to be installed near.

 In order to improve the operability of the seated person, it is preferable to arrange at least the operation units corresponding to the adjustment units. This also makes it possible for the occupant to grasp the position of the operation unit at a glance.

 As a specific embodiment, it is preferable that the collectively arranged adjusting units be covered with a cover. In particular, in order to reduce the number of parts and the manufacturing cost or to facilitate the assembly work, a single cover is used to connect the operation section to the connection means. The one that covers the part is also preferable.

 Specifically, a preferable setting portion of the adjusting section may be a lower portion of the seat.

 As the connection means, a link wire may be used as an example. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a schematic overall side view showing a normal use position of a chair according to a first embodiment of the present invention and a state in which a lower portion of a backrest is projected forward at that position.

 FIG. 2 is a schematic overall side view showing a chair in the most inclined position in the embodiment.

 FIG. 3 is a schematic overall side view showing a state in which only the back of the chair in the embodiment is tilted backward.

Fig. 4 shows the chair in the most inclined position in this embodiment. 1 is a schematic overall side view.

 FIG. 5 is a partial perspective view showing the operation unit in the same embodiment as viewed from the rear.

 FIG. 6 is a partial plan view of the operation unit in the same embodiment as viewed from below.

 FIG. 7 is a partial perspective view of the operation unit in the same embodiment as viewed from below.

 FIG. 8 is a partial plan view of the operation unit in the same embodiment as viewed from the front.

 FIG. 9 is a partial plan view of the operation unit in the same embodiment as viewed from the front.

 FIG. 10 is a partial plan view of the operation unit in the same embodiment as viewed from below.

 FIG. 11 is a cross-sectional view of the back-tilt mechanism in the embodiment.

 FIG. 12 is a cross-sectional view of the back-tilt mechanism in the embodiment.

 FIG. 13 is an exploded perspective view of the back tilting mechanism in the embodiment.

 FIG. 14 is a schematic perspective view of the forward tilt angle adjusting mechanism in the embodiment.

 FIG. 15 is a diagram showing an operation mode of the forward tilt angle adjusting mechanism in the embodiment.

FIG. 16 shows a normal position of the chair in the second embodiment of the present invention and a state in which the lower part of the backrest is projected forward. It is the outline whole side view shown.

 FIG. 17 is a schematic overall side view showing the chair in the most inclined position in the embodiment.

 FIG. 18 is a schematic overall side view showing only the back of the chair in the embodiment in the rearwardly inclined position.

 FIG. 19 is a schematic overall side view showing the chair in the most inclined position in the embodiment.

 FIG. 20 is a partial perspective view showing the operation unit in the same embodiment as viewed from the rear.

 FIG. 21 is a partial plan view of the same embodiment as viewed from below the operation unit.

 FIG. 22 is a partial perspective view of the operation unit in the same embodiment as viewed from below.

 FIG. 23 is a partial plan view of the operation unit in the same embodiment as viewed from the front.

 FIG. 24 is a partial plan view of the operation unit in the same embodiment as viewed from the front.

 FIG. 25 is a partial plan view of the operation unit in the same embodiment as viewed from below.

 FIG. 26 is a cross-sectional view of the back-tilt mechanism in the embodiment.

 FIG. 27 is a cross-sectional view of the back-tilt mechanism according to the embodiment.

FIG. 28 is an exploded perspective view of the back tilting mechanism in the embodiment. FIG. 29 is a schematic perspective view of the forward tilt angle adjusting mechanism in the embodiment.

 FIG. 30 is a diagram showing an operation mode of the forward tilt angle adjusting mechanism in the embodiment.

 FIG. 31 is a schematic side view showing the overall configuration of the chair according to the present invention.

 FIG. 32 is a schematic bottom view showing the operation unit of the chair according to the present invention.

 FIG. 33 is a side view showing a third embodiment of the present invention.

 FIG. 34 is a front view showing the same embodiment.

 FIG. 35 is a schematic overall side view showing the tilting operation of only the upper portion of the backrest and the tilting operation of only the lower portion of the backrest in the same embodiment.

 FIG. 36 is a schematic overall side view showing the locking operation in the same embodiment.

 FIG. 37 is a schematic overall side view showing the elevating operation of the back seat in the same embodiment.

 FIG. 38 is an exploded perspective view of the locking mechanism in the embodiment.

 FIG. 39 is an overall plan view of the seat according to the embodiment.

 FIG. 40 is an overall plan view of the adjustment area in the same embodiment as viewed from below.

Fig. 41 shows the adjustment area and force in the embodiment. FIG. 3 is an exploded perspective view showing the battery as viewed from below.

 FIG. 42 is a cross-sectional view showing the operation unit and the adjustment unit in the same embodiment.

 FIG. 43 is a cross-sectional view showing the operation unit and the adjustment unit in the same embodiment.

 FIG. 44 is a cross-sectional view showing the operation unit and the adjustment unit in the same embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First embodiment>

 The first embodiment of the present invention will be described below with reference to FIG. 1 to FIG.

FIG. 1 is an overall side view of a chair XI showing an embodiment of the present invention. The chair XI includes a base leg X2, a base X3 attached to the base leg X2, a seat X4 and a back X5 supported by the base X3. Functionally, as shown in Fig. 1 to Fig. 4, etc., the back seats X4 and X5 are linked to lock. Back seat opening locking function, front tilt angle adjustment function to adjust the front tilt angle of the seat X4, back tilt function to tilt only the back X5, and the back seat boundary It also has at least a back seat boundary adjusting function for moving or deforming the portion and a back seat elevating function for adjusting the height of the back seats X4 and X5. To explain each part in detail, the support base X 3 is a long one, and the lower end thereof is fitted to the upper end of the column X 2 a constituting the base leg X 2, and the diagonal forward is provided. It is arranged to extend.

 The seat X4 has a seating surface X4b mounted on a frame-shaped seating support X4a.

 The back X5 has a stretching member X5b attached to the front side of the frame-shaped back support rod X5a, and, in appearance, stands continuously from the rear edge of the seat X4. Make a shape that goes up. In addition, using the tension of the tension member X5b, the backrest surface is provided with cushioning.

 Next, a configuration for realizing each of the functions will be described.

 As shown in Fig. 1 and Fig. 2, the back seat locking function is used to move the back seats X4 and X5 to the normal use position (Fig. 1) or the forward tilt position (Fig. 4). ) And a rearwardly inclined position (FIG. 2), which is interlocked and tilted and moved between the base X3 and the seats X4 and X5. With the use of the four-sided link mechanism XK 1, when the back X 5 is tilted backward, the seat X 4 moves backward while tilting backward. .

As shown in Fig. 1 and the like, the four-sided link mechanism XK1 connects the ends of four link members X6a to X6a to 6d through support shafts Xtl to Xt4. So that they are rotatably connected to each other, so that each connection point forms a trapezoidal side view square The base X3 has a lower link meno X6a, a seat X4a has an upper link menno \ 'X6b, and a back support rod X5 (a lower frame described later). X5c) also functions as the rear link body X6c, and a dedicated front link body X is provided between the front ends of the base X3 and the seat X4a. 6 d is arranged.

 As shown in FIGS. 1 and 2, in this embodiment, a lock for switching the back seat opening locking function between an operable state and an inoperable state is provided. A switching mechanism XK 2 is provided. This locking switching mechanism XK 2 is a first gas spring that is an elastic member that can switch between an elastic free state and a locked state where the length is fixed. And one end of the XGS 1 is rotatably connected to a portion displaced from the connecting axis Xt3 with the front link member X6d on the support base X3. Is rotatably coupled to a portion Xt6 deviated from a coupling axis Xt3 with the support base X3 in the front link member X6d. When the gas spring XGS 1 is in a free state, the force of its forward movement is applied to the front link member X 6 d by the extension force, and the force of the back seat X is applied. 4 and X5 are biased in the forward leaning direction.

The switching between the free state and the open state of the gas spring XGS 1 is performed by operating the switching button XB 1 provided at the end of the first gas spring XGS 1. The switching button XB1 is connected to a first operation unit X14 described later via a link wire XW1, and the switching button XB1 is connected to the first operation unit X14. The gas spring is operated by operating the operation section X14. Switch the state of XGS 1 and switch between the state where the back seats X 4 and X 5 can be locked and the state where the back seats X 4 and X 5 are fixed at a desired angle. To be able to do so.

 The forward-tilt angle adjusting function is configured to move the forward moving ends of the back seats X4 and X5 by the four-side link mechanism XK1 to the normal use position (first position) where the seating surface X4b is substantially horizontal. (Fig. 4) and the forward tilting position (Fig. 4) where the seating surface tilts slightly forward (Fig. 4). This is realized by using the forward tilt angle adjustment mechanism XST1. .

 In the present embodiment, as shown in FIGS. 14 and 15 in detail, this forward tilt angle adjusting mechanism XST 1 is provided with a protrusion provided at the upper end of the front link member X 6 d. A portion X6d1 and a regulating member X41 provided corresponding to the portion X6d1 are provided.

As shown in FIG. 14, this restricting member X41 is attached to a connecting shaft X42 provided across a rib X43a of a seat X4a. Therefore, it has a disk shape having a certain thickness and is provided with a sandwiching portion X41a protruding from the outer periphery thereof. In addition, an induction cam X44 is attached to one end of the connecting shaft X42 outside the rib X43a of the seat X4a. The rotation direction of the regulating member X41 can be switched between the X direction and the y direction by the action of the inclined cam X45 provided facing the same. The guiding cam X44 is formed in a disk shape, and is provided with a mountain X44m rising from the surface thereof, and is provided with an inclined cam X45 opposite thereto. Located at valley X 45 V I'm trying to make it work.

 On the other hand, the inclined cam X45 has an inclined surface having a valley X45V and a peak X45m on the surface side facing the induction cam X44. On the other side, the spring is set so that the peak X44m of the guiding cam X44 is guided to the valley X45V of the inclined cam X45. Pressing is performed in the axial direction with X46. The spring X46 is provided between the inclined cam X45 and the side wall X43b of the seat support X4a, and a lever X47 is provided. By being wound around the axis XJ, the tilt cam X45 is mounted so as to press against the induction cam X44.

 Next, a description will be given of the chair X1 configured as described above, in which the seat X4 is moved from the normal use position (FIG. 1) to the forward tilt position (FIG. 4).

First, in the state of the normal use position (Fig. 1), the front link body X6d, the regulating member X41, the induction cam X44, and the inclined cam X45 are shown in Fig. 15 ( a), that is, the pinching portion X41a of the regulating member X41 is in contact with the projection X6d1 of the front link member X6d and the top plate of the seat. They are in a positional relationship sandwiched between them. In this state, the rotation axis XJ is stopped by rotating it 90 degrees or more in the y direction until it reaches a rotation restriction position (not shown). Then, as shown in Fig. 15 (b), the axis XJ reaches the position where the peak X45m of the inclined cam X45 exceeds the peak X44m of the guiding force X44. Rotate while sliding upwards away from guiding cam X 4 4 It is done. Since the inclined cam X45 is pressed in the direction of the induction cam X44 by the spring X46, the peak of the induction cam X44 is in this state. X44m tries to rotate down in the X direction by sliding down the peak X45m of the inclined cam X45, but the clamping member X41a of the regulating member X41 is in front. Since it is sandwiched between the projecting portion X6d1 of the link member X6d and the top plate X43c of the seat support X4a, the regulating member X41 and the induction cam X44 are provided. Cannot rotate.

 In this state, when the occupant tilts the seat X4 and the back X5 backward, the seat X4a 'front link meno X6d' and the lower frame X5c The four-sided link mechanism XK1 formed by the support base X3 is deformed, and the front link member X6d rotates in the X direction about the axis Xt3. Become so . Along with this, as shown in FIG. 15 (c), the projection X6d1 of the front link member X6d is turned downward, and the projection X6d1 is Based on the opening of the space with the top plate X43c, the guiding force X44 also rotates in the X direction opposite to the operation direction of the tilt cam X45, and Induction force. The peak X44m of X44 is now located at the valley X45V of the inclined cam X45. Along with this, the tilt cam X45 also rotates back to the X direction, and rotates about 90 degrees from the state of the normal use position (Fig. 15 (a)). Stop in the state where it was made.

Then, when the seat or back X5 is returned in this state, the four-sided link mechanism XK1 is deformed, and the front link Menno X6 is inclined forward. Seat X with support X 4 4a sinks forward. In addition, with this, the spine X5 is also tilted forward about the axis Xt2 (Fig. 15 (d)).

 Also, when returning from the forward tilt position state (Fig. 15 (d)) to the normal use position (the position where the front link member X6d stands up), use the rotary shaft. Rotate XJ approximately 90 degrees or more in the X direction until it reaches the rotation regulation position (not shown) and stop. Along with this, the peak X45m of the inclined cam X45 exceeds the peak X44m of the induction cam X44, and it depends on the pressing force of the spring X4f. Therefore, the peak X44m of the guiding cam X44 rotates in the y direction so that it slides down the peak X45m of the inclined cam. Then, based on this rotation, the rotation is stopped where the peak X41a of the regulating member X41 comes into contact with the protrusion X6d1 of the front link X6d. However, the set state of the normal use position (the position where the previous link member X6d stands) is maintained.

 Then, when the seat X4 and the back X5 are tilted backward again in this state, the four-side link mechanism XK1 is deformed, and the front link member X63 is centered on the shaft center 3. And rotate in the X direction. Accordingly, as shown in FIG. 15 (f), the protruding portion X6d1 of the front link member X6d faces downward, and the regulating member X4 The space provided between the pinch portion X62 of No. 1 and the top plate X43c of the seat support X4a is opened, and the pinch portion of the regulating member X41; X41 Rotate so that a is pinched in this space.

Then, when the seat X 4 and the back X 5 are returned in this state, the front The link member X6d is displaced in a direction to return to its original position, and the rotation of the front link member X6d at the position sandwiching the holding portion X41a of the regulating member X41. Be regulated. As a result, the inclination angle of the seat support X4a on which the seat X4 is mounted is set to be substantially horizontal, and the seat is in the normal use position (the position where the front link member X6d stands up). It will be kept in a state.

The back tilting function is a function that can tilt only the upper part of the back X5, and is realized by the back tilting mechanism XK3. As shown in FIGS. 1 and 3, the back tilting mechanism XK 3 includes a back support rod X 5 a, a lower frame X 5 c located below the seat support X 4 a, and a lower frame X 5 c. The upper frame X5d, which is the part corresponding to the backrest surface as the main part, is rotatably connected to the frame X5c via the support shaft Xt5 extending horizontally and horizontally. The upper frame X5d is positioned between the standing position (shown in Fig. 1) and the most inclined position (shown in Fig. 3) with respect to the lower frame X5c. It is configured to be able to tilt between the two. The upper frame X5d receives the force from the spring XS1, which is an elastic member, in the direction in which the upper frame X5d is always in the standing posture. Is arranged in the lower frame X5c so that the direction of expansion and contraction thereof coincides with the longitudinal direction of the lower frame X5c. The setting position of the support shaft Xt5 is between the support shafts Xt1 and Xt2 constituting the four-sided link mechanism XK1. The tilting center of the back X5 when the back X5 is tilted backward is different from the tilting center of the back X5 when the back X5 is tilted backward by the back seat locking function. I am trying to do it. Note that the spring XS1 is omitted in FIGS. 2 and 4.

 Further, in the present embodiment, the back-tilt switching mechanism XK4 for switching the back-tilt function between the operable state and the inoperable state is provided. The back-tilt switching mechanism XK4 is, as shown in detail in FIGS. 11 to 13, in a state in which the rotation of the upper frame X5d with respect to the lower frame X5c is prohibited. It is designed to switch between the states that can be accommodated. Specifically, it is a portion of the upper frame X5d and the lower frame X5c that is deviated from the support shaft Xt5 and overlaps in a side view in a standing posture. Recesses X5d1 and X5cl are provided in the respective portions, and the pins X7 are inserted into the right and left over the respective recesses X5dl and X5c1. Thus, it becomes more inoperable, and when pin X7 is removed, it becomes more operable.

 Pin X7 penetrates through hole X5c1, which is a concave portion on lower frame X5c side, from the inside and penetrates through hole X5d1, which is a concave portion on upper frame X5d side. However, a flange X7a is provided on the side opposite to the insertion end of this pin 7, and between the flange X7a and the inner surface of the upper frame X5d. With the coiling spring XS2 interposed in the pin, at least no pin X7 is applied when no external force is applied as shown in Fig. 13. The upper frame X5d is set so as to be pulled out from the through hole X5d1 of the upper frame X5d.

On the other hand, these upper frame X 5d and lower frame X 5d The seat X4a, which is positioned more inward than 5c, has an opening on the outer side surface X4a2 to allow the pin X7 to be inserted. The pin 1 is provided with a pressing member X 8 that moves forward and backward inside the pin and the hole X 4 a 1. The pin X7 is pushed outward so as to fit into the recess X5d1 of the upper frame X5d. The pressing member X8 has a pressing position (shown in FIG. 11) where the pressing surface X8a against the pin X7 is flush with the outer surface X4a2, and the pressing surface X8 a is set so that it can move back and forth between the outer surface X4a2 and the non-pressing position (shown in Fig. 12) that has not been drawn inward. The operation of the first operation unit X14 is performed by being transmitted via the motion conversion mechanism XD1 (shown in Figs. 6 and 13). The motion conversion mechanism XD 1 is rotatably supported by a seat X 4 a and a link frame X 9 having one end rotatably connected to a pressing member X 8, and the link frame A rotating arm X10 having a rotating end rotatably connected to the other end of X9, and one end connected to a rotating end of the rotating arm XI0; A link wire XW1a for transmitting the operation of the first operation section X14 and rotating the rotating arm XI0, and a force.

Then, when the upper frame X5d is in the standing posture (shown in FIG. 1) with respect to the lower frame X5c, the first operation unit X14 is operated. When the pressing member X8 is driven to the pressing position, the pin X7 straddles the through holes X5dl and X5cl. When it is inserted, the back X5 cannot be tilted. When the reverse operation is performed, the pin X7 comes out of the recess X5d1 of the upper frame X5d by the coil spring XS2, and the back X5 is tilted. The rotation is allowed to be performed.

 In order for the pin X7 to come out of the through-hole X5d1 of the upper frame X5d, the reentrant end face of the pin X7 must be in contact with the outer surface of the seat X4a. The length of pin X7 is set so that it is located further inside. That is, in order for the pin X7 to escape from the through-hole X5d1 of the upper frame X5d, it is necessary to insert the pin X7 into the hole X4a1. As shown in Fig.1 and Fig.2, this pin 揷 hole X4 al has the seats X4 and X5 in the normal use position in the seat locking function. Only in this case, the side frame overlaps with the through-hole X5c1 on the lower frame X5c side, and in a state where the n seats X4 and X5 are at positions other than the normal use position, 刖 0 self-recess X5 It does not overlap with d 1 and X 5 c 1 in side view. Therefore, the back seat X 4 X 5 is normal, and the pin X 7 is connected to the upper frame X 5 d in the recess X to enable the function of tilting the back in a position other than the use position. Even if you try to pull out from 5 dl, the reentrant end face of pin X7 does not come off against the outer face X4a2 of seat X4a, and in this state the tilting function is not performed. Does not work.

Further, the first operation unit X14 switches the first gas spring XGS1 between the free Z lock state and the pressing member X8 between the pressing position Z and the non-pressing position. Is responsible for the two functional operations of In the present embodiment, when the first operation unit X14 is operated in a certain direction, the first gas spring XGS1 is brought into a free state, and the pressing member is moved to the pressing position. Then, when the first operation section X14 is operated in the opposite direction, the first gas spring XGS1 is locked and the pressing member X8 is moved to the non-pressing position. I am trying to make it happen.

 Next, as shown in Fig. 1, the back seat boundary movement function is a function that can change the rear inclination angle of the seating surface and the front-rear projection dimension of the lower part of the backrest surface. A tilting body X12 that is tiltably arranged behind a and a rubber support arm X13 that is integrally provided at the rear end of the tilting body X12 are used.

 The tilting body XI 2 is a pair of left and right frame-like members extending below the rear end of a cushion or the like constituting the seating surface X 4 b and extending forward and backward. It is pivotally connected to the back support rod X5 (lower frame X5c) via the support shaft Xt1. A lower position XL (shown by a solid line in FIG. 1) where the rear part X 4 bl of the seating surface is substantially flush with the front part X 4 b 2 of the seating surface, and the rear part X 4 b 1 of the seating surface Between the upper position XU (shown by the two-dot chain line in FIG. 1) so that the rear end is higher than the front end.

The lamp support arm X13 is a frame-shaped one that bends at a substantially right angle from the rear end of the tilting body X12 and extends integrally from the side, as viewed from the side. The tension member X5b that forms the lower part of the sagging surface is supported from the left and right. And tilting body XI 2 is lower As it moves from the position XL to the upper position XU, it protrudes forward, and the lower part of the backrest surface protrudes forward while increasing the tension of the tension member X5b at that portion. At the tip of the rubber support arm X13, there is a bent part XI3a which is bent backward in an arc shape to improve the feeling of hitting the hip bone. .

In the present embodiment, a switching mechanism XK5 for switching the operation of the back seat boundary portion moving function between inoperative and inactive is provided. By operating the switching button XB5 provided at the end of the second gas spring XGS2, the switching mechanism XK5 can be extended and contracted by a free state and a long state. It is configured using a second gas spring XGS2, which is an elastic member that is switched to a locked state in which the lock is fixed. Then, one end of the second gas spring XGS2 is connected to the back support rod X5a (more specifically, the lower frame X5c) and the seating axis X4a by the connecting axis Xtl. The other end of the tilting body XI 2 is pivotally connected to a portion deviated from the connecting axis Xt 5 with the back support rod X 5 a in the tilting body XI 2. In the present embodiment, which is coupled, in a state where the second gas spring XGS2 is in a free state, the tilting body X12 is tilted forward by the extension force of the second gas spring XGS2. The moving force is applied. Further, the switching button XB5 is connected to a second operation section X15 described later via a link wire XW2, and is used for operating the second operation section X15. Therefore, the state of the second gas spring XGS 2 can be switched to move or deform the back seat boundary. And a state in which the back seat boundary portion is fixed in a desired form.

 The seat elevating function is to raise and lower the back seats X4 and X5, and the support X2a constituting the base leg X2 is connected to the third gas spring XGS3 (shown in FIG. 7). The length of the column X2a is changed by the expansion and contraction of the third gas spring XGS3, and the back seats X4 and X5 are raised and lowered. The switching operation of the third gas spring XGS3 is performed by a fourth operation section X17 described later.

 However, in the present embodiment, as shown in FIG. 7, the first operation unit X14 to the fourth operation unit X17 are arranged in this order in a back and forth direction from the rear force to the front. Are arranged below the right edge of the seat.

 As shown in FIGS. 5 to 10, each of the operation units X14 to X17 has a rectangular thin plate shape, and has the same shape except for the base end. . The base end is rotatably supported around a horizontal axis extending in the front-rear direction by an operation section support frame XI8 fixed to the seat support X4a. In the posture, the operating end, which is the tip, is set to protrude outward. In the same horizontal position, the operating ends are also at the same height. The rotation axes XI9 of the operation units X14 to X17 are set to be on the same line.

As described above, the first operation section X 14 switches the locking function between activation and deactivation, as well as the desired locking. This is for fixing the back seats X4 and X5 at the swing angle, but also for switching the back tilting function on and off. Then, as shown in FIG. 8, the operating end is protruded outward, and the operating end is pivoted downward from this horizontal posture (solid line in FIG. 8). A stable toggle operation is performed in two postures: a vertical posture (broken line in Fig. 8). Specifically, the connection point X14a of the link wire XW1 to the first operation unit X14 is set at a position deviated from the rotation axis X19 of the first operation unit X14. Then, as the first operation unit X14 rotates between the horizontal position and the vertical position, the tube fixing point XI provided on the operation unit support frame X18 is set. 8a1 is set at a position that straddles a virtual line connecting the rotation axis XI9 of the first operation unit XI4. The link wire XW1 is always subjected to a force to pull the first operation portion X14 inward by an elastic member (not shown) or the like. With this configuration, the above-described toggle operation is performed. In the horizontal position, the locking function is inactive, and in the vertical position, the locking function is active. The link wire XW1 branches on the way to XWla and XWlb, and is connected to the rotating arm XI0 and the first gas spring XGS1, respectively. In addition, the top surface of the tip is partially provided with irregularities XQ so that it can be recognized with a finger.

As described above, the second operation unit X 15 switches the operation of the movement function of the back seat boundary portion movement function and the non-operation thereof as well as the desired operation. It is for fixing the back seat boundary part in the form, and is connected to the operation button of the second gas spring XGS 2 via the link wire XW 2. In a natural state where no external force is applied, this is urged by an elastic member such as a spring (not shown) so as to be in a horizontal posture, and the momentary switch is provided. Perform appropriate actions. However, in this horizontal posture, the second gas spring XGS 2 is fixed. Then, as shown in FIG. 9, when the operator rotates the end of the second operation part X15 upward against the urging force, the second gas spring XGS 2 is in a free state so that the tilting body X12 and the lamp support arm XI3 can be tilted. In addition, on the lower surface of the distal end portion, unevenness XQ is provided partially so that the finger can be recognized.

 As described above, the third operating unit XI 6 shown in FIG. 10 is configured to move the forward moving ends of the back seats X 4 and X 5 by the four-side link mechanism XK 1 to the seating surface X 4 b. It is intended to switch between the normal use position where is substantially horizontal and the most forwardly inclined position where the seating surface X4b is slightly inclined forward. Specifically, when the vehicle is in the horizontal posture, the seating surface X4b can be set to the normal use position, and when it is set to the vertical posture, the seating surface X4b can be set to the frontmost inclined position. Is set to.

As described above, the fourth operation unit XI7 is for adjusting the height of the back seats X4 and X5, and is an operation button of the third gas spring XGS3. It is connected to link via link wire XW4. This is a natural state without external force. In this state, it is urged by an elastic member such as a panel (not shown) so as to be in a horizontal posture, and performs an operation like a momentary switch. However, in this horizontal posture, the third gas spring XGS 3 is fixed. Then, when the operator rotates the end of the fourth operation portion X17 upward against the urging force, the third gas spring XGS3 is brought into a free state. It is configured so that the back seats X4 and X5 can be raised and lowered. In addition, the lower surface of the end of the fourth operation unit X17 has unevenness partially so as to be recognized by a finger.

 Note that the present invention is not limited to the above-described embodiment, and the operation unit is not limited to the above four. For example, if a function that allows the seating surface to slide back and forth has been added, the operation section of this function should be installed at the same height as the existing operation section to improve operability. Can be improved. At that time, depending on the mounting position of the new operation unit, the relative distance between the operation units may vary depending on the operation of the slide or the like.

 Further, the shape of each operation unit does not need to be the same, the width may be changed, and the arrangement interval is not limited to the equal interval.

<Second embodiment>

 Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 16 to 32.

FIG. 16 is an overall side view of the chair Y1 showing one embodiment of the present invention. The chair Y1 has a base leg Y2, a base Y3 attached to the base leg Y2, and a base Y3. It basically has a seat Y 4 and a back Y 5 supported by Y 3, and functionally, as shown in FIGS. 16 to 19, the back seat Y 4, Locking function of the back seat for locking the Υ5 in conjunction with the front sloping angle function for adjusting the forward sloping angle of the seat の み 4, and the back sack 5 only Back tilting function for tilting the seat, back seat boundary adjusting function for moving or deforming the back seat boundary, and a back seat for adjusting the height of the back seats Υ4 and Υ5 It has at least a lifting function.

 To explain each part in detail, the support base Υ3 is a long one, and the lower end thereof is fitted to the upper end of the support Y2a constituting the base leg Υ2, and the support base Υ3 is obliquely forward. It is arranged to extend.

 The seat Y4 has a seat Y4b mounted on a frame-shaped seat Y4a.

 The back Y5 is attached to the front side of the frame-shaped back support rod Y5a.

It is equipped with Y5b, and has a shape that stands up continuously from the rear edge of the seat Y4 in appearance. In addition, using the tension of the tension member Y5b, the backrest surface is provided with cushioning.

 Next, a configuration for realizing each of the above functions will be described.

As shown in Fig. 16 and Fig. 17, the back seat locking function is used to set the back seat Y4, Υ5 to the normal use position (Fig. 16) or the forward tilt position described later. (Fig. 19) and the tilting movement in conjunction with the last tilt position (Fig. 17). Therefore, a four-sided link mechanism Υ 1 interposed between the support base Y 3 and the back seats Υ 4, Υ 5 is used to tilt the back Υ 5 backward. When this is done, the seat 後 4 is moved backward while tilting backward.

 As shown in Fig. 16 and the like, the four-sided link mechanism YK1 connects the ends of the four link members Y6a to Y6d to support shafts Yt1 to Yt. 4 so as to be rotatably connected to each other so that each connection point forms a trapezoidal side view in a side view, so that the lower link member Y 6 a, Function as upper link meno Y6b on seat Y4a and rear link menno Y6c on back support rod Y5 (lower frame Y5c described later) And a dedicated front link member Y6d is arranged between the front ends of the support Y3 and the seat Y4a.

Then, as shown in FIGS. 16 and 17, in the present embodiment, the back seat locking function is used to switch between the operable state and the inoperable state. A locking switching mechanism YK2 is provided. This locking switching mechanism YK 2 has a free and stretchable free state and a fixed length, and a first gas spring as an extendable member that can switch between a locked state and a locked state. One end of the ring YGS 1 is rotatably coupled to a portion displaced from the coupling axis Yt 3 with the front link meno Y 6 d on the support base Y 3, and other The end is pivotally connected to a portion Yt6 deviated from a coupling axis Yt3 with the support Y3 in the front link meno Y6d. When the gas spring YGS 1 is in a free state, its extension force causes A forward leaning force acts on the member Y6d, and the back seats Y4 and Y5 are biased in the forward leaning direction.

 The switching between the free state and the open state of the gas spring YGS 1 is performed by using the switching button YB 1 provided at the end of the first gas spring YGS 1. This switching button YB1 is connected to a first operation section Y14, which will be described later, via a link wire YW1. By operating the first operation unit Y14, the state of the gas spring YGS1 is switched, and the state in which the back seats Y4 and Υ5 can be locked is performed. The back seats Υ4 and Υ5 can be switched to a fixed state at a desired angle.

 The forward-tilt angle adjustment function is configured to move the forward moving ends of the back seats Υ 4 and Υ 5 by the four-side link mechanism Υ Κ 1 to the normal use position (the second position) where the seating surface Y 4 b is substantially horizontal. 16) and the most inclined position (Fig. 19) where the seating surface is inclined slightly forward. The forward inclination adjustment mechanism YST1 is used. Is realized.

 In the present embodiment, as shown in FIGS. 29 and 30 in detail, the forward tilt angle adjusting mechanism YST1 is provided with a protrusion provided at the upper end of the front link member Y6d. A portion Y6d1 and a regulating member Y41 provided corresponding to the portion Y6d1 are provided.

As shown in FIG. 29, the restricting member Y41 was attached to a connecting shaft Y42 provided across a rib Y43a of the seat Y4a. It has a disc-like shape with a certain thickness, and has a sandwiching part Y 4 protruding from the outer periphery thereof. It is configured with la. Also, this connecting axis Y

At one end of 42, an induction cam Y44 is attached to the outside of the rib Y43a of the seat Y4a, and it is provided to face this. The rotation direction of the regulating member Y41 can be switched between the X direction and the y direction by the action of the tilt cam Y45. This guiding cam Y44 is formed in a disk shape, and is provided with a peak Y44m rising from the surface thereof, and a valley Y44 of the facing inclined cam Y45. It is set to 45 V.

 On the other hand, the inclined cam Y 45 has a slope having a valley Y 45 V and a peak Y 45 m on the side facing the guiding cam Y 44. On the other side, the peak Y4 4m of the guiding cam Y44 is also the valley Y4 of the inclined cam Y45.

The spring is pressed in the axial direction with a spring Y46 so that it is guided to 5 V. The spring Y46 is provided between the inclined cam Y45 and the side wall Y43b of the seat Y4a, and has a lever Y47. By winding around the axis YJ, the inclined cam Y45 is mounted so as to press against the induction cam Y44.

 Next, a description will be given of the chair Y1 configured as described above, in which the seat Y4 is moved from the normal use position (FIG. 16) to the forward inclined position (FIG. 19).

First, in the state of the normal use position (Fig. 16), the front link member Y6d, the restricting member Y41, the induction cam Y44, and the inclined cam Y45 are in the same position as the first. 30 Position as shown in Fig. (A) Relationship, that is, the position where the sandwiching portion Y41a of the regulating member Y41 is sandwiched between the projecting portion Y6d1 of the front link member Y6d and the top plate of the seat support. In a relationship. In this state, stop the rotation axis YJ by rotating it 90 degrees or more in the y direction until it reaches the rotation restriction position (not shown). Then, as shown in Fig. 30 (b), the axis YJ reaches the position where the peak Y45m of the inclined cam Y45 exceeds the peak Y44m of the induction cam Y44. It is rotated while sliding upwards away from the guide cam Y44. Since the inclined cam Y45 is pressed in the direction of the guide cam Y44 by the spring Y46, in this state, the ridge of the guide cam Y44 is in this state. Y 4 4 m is inclined cam

It tries to rotate down in the X direction by sliding down the mountain Y45m of Y45, but the pinching part Y41a of the regulating member Y41 has the front link Menno Y6d. Between the protrusion Y6d1 and the top plate Y43c of the seat Y4a, the restricting member Y41 and the guide cam Y44 cannot be rotated. ing.

 In this state, when the occupant tilts the seat Y4 and the back Y5 backward, the seat Y4a 'front link member Y6d' lower frame Y5c. 'The four-sided link mechanism YK1 composed of the support Y3 is deformed, and the front link Menno' Y6d rotates in the X direction about the axis Yt3. To become savvy. Along with this, as shown in Fig. 30 (c), the protrusion Y6dl of the front link meno Y6d is turned downward, and the protrusion Y6dl and the top plate are turned down.

Based on the opening of the space with Y43c, the guiding force Y44 also changes in the opposite direction to the operation direction of the tilt cam Y45. Rotating in a certain x direction, the peak Υ 44 m of the guide cam Y 44 is located at the valley Y 45 V of the inclined cam Y 45. At the same time, the tilt cam Y 45 also rotates back to the X direction, and is rotated by about 90 degrees from the state of the normal use position (FIG. 30 (a)). Stop in the state where it was made.

 Then, when the seat Y4 and the back Y5 are returned in this state, the four-sided link mechanism YK1 is deformed, and the front link member Y6d is inclined forward. As a result, the seat Y4a on which the seat Y4 is mounted sinks forward. Along with this, the spine Y5 also leans forward about the axis Yt2 (Fig. 30 (d)).

 Also, when returning from the forward tilt position state (Fig. 30 (d)) to the normal use position (the position where the front link member Y6d stands up), use the rotating shaft. Rotate the YJ in the X direction by about 90 degrees or more until it reaches the rotation regulation position (not shown), and stop at that position. Along with this, the mountain of inclined cam Y 45

Y45m exceeds the peak Y44m of the induction cam Y44, and the peak Y44m of the induction cam Y444 is inclined by the pressing force of the spring Y46. Rotate in the y direction so that it slides down the hill Y 45 m. Then, based on this rotation, the regulating member

The peak of Y 4 1 Y 4 1 a is the protrusion of the front link Men 'Y 6 d

The rotation stops when it comes into contact with Y 6 d 1, and the set state of the normal use position (the position where the front link member Y 6 d stands up) is maintained.

Then, in this state, the seat Y 4 and the back Y 5 are tilted back again. Then, the four-side link mechanism YK1 is deformed, and the front link member 6d rotates in the X direction around the axis Yt3. Then, as shown in FIG. 30 (f), the projecting portion Y6d1 of the front link member Y6d is turned downward, and the regulating member Y41 is moved downward. The space provided between the sandwiching portion Y62 and the top plate Y43c of the seat Y4a is opened, and the sandwiching portion Y41a of the regulating member Y41 becomes Rotate so that it is sandwiched in the space.

 Then, when the seat Y4 or the back Y5 is returned in this state, the front link meno Y6d is displaced in a direction to return to the original position, and the regulating member is displaced.

The rotation of the front link member Y6d is restricted at the position sandwiching the sandwiching portion Y41a of Y41. As a result, the inclination angle of the seat support Y 4 a on which the seat 4 is mounted is set to be substantially horizontal, and the tilt angle of the normal use position (the position where the front link member Y 6 d stands) is set. You will be kept in a state.

 The back tilting function is a function capable of tilting only the upper part of the back Y5, and is realized by the back tilting mechanism YK3. As shown in FIGS. 16 and 18, the back tilting mechanism YK 3 includes a back support rod Y 5 a and a lower frame Y 5 c located below the seat support Y 4 a. The upper frame which is rotatably connected to the lower frame Y5c via a support shaft Yt5 extending horizontally and horizontally, and which is a portion corresponding to a backrest surface as a main part. The upper frame Y5d is the lower frame, assuming that the upper frame Y5d

For Y5c, a device that can be tilted between a standing position (shown in Fig. 16) and a tilted position (shown in Fig. 18) It is. The upper frame Y5d receives power from the spring YS1, which is an elastic member, in the direction in which the upper frame is always in the upright posture, and this spring is used. The YS 1 is arranged in the lower frame Y5c so that its expansion and contraction direction coincides with the longitudinal direction of the lower frame Y5c. The setting position of the support shaft Yt5 is between the support shafts Ytl and Yt2 constituting the four-sided link mechanism YK1. The center of tilt of the back Y5 when tilted is different from the center of tilt of the back Y5 when the back Y5 is tilted backward by the back seat locking function. Yes. In addition, in FIGS. 17 and 19, the spring YS1 is omitted.

 Further, in the present embodiment, the back-tilt switching mechanism YK4 for switching the back-tilt function between the operable state and the inoperable state is provided. As shown in detail in FIGS. 26 to 28, this back-tilt switching mechanism YK4 is in a state where the rotation of the upper frame Y5d with respect to the lower frame Y5c is prohibited and the allowable state. It is intended to switch between the states that are performed. Specifically, it is a portion of the upper frame Y5d and the lower frame Y5c which is deviated from the support axis Yt5, and is a side view overlap in a standing posture. The recesses Y5d1 and Y5cl are provided in the respective portions to be inserted, and the pins Y7 are inserted into the right and left over the recesses Y5dl and Y5c1. In this state, it becomes more inoperable, and when pin Y7 is removed, it becomes more operable.

Pin Y7 is a recess on the lower frame Y5c side from inside. It penetrates through the through hole Y5c1 and is inserted into the throughhole Y5d1, which is a concave part on the upper frame Y5d side. A portion Y7a is provided, and a coilless spring YS2 is interposed between the flange portion Y7a and the inner surface of the upper frame Y5d. As shown in FIG. 28, when no external force is applied, as shown in FIG. 28, at least the pin Y7 comes out of the through hole Y5d1 of the upper frame Y5d. It is set as follows.

On the other hand, the seat Y4a positioned inward from the upper frame Y5d and the lower frame Y5c has an opening on the outer side surface Y4a2, and the pin A pin insertion / removal hole Y4a1 into which Y7 can be inserted is provided, and a pressing member Y8 that moves forward and backward inside the pin ピ removal hole Y4a1 Then, the pin Y7 is pushed outward by the pressing member Y8 so that the pin Y7 fits into the recess Y5d1 of the upper frame Y5d. ing . The pressing member Y8 has a pressing position (shown in FIG. 26) where the pressing surface Y8a against the pin Y7 is flush with the outer side surface Y4a2. Y8a is set to be able to advance and retreat from the non-pressing position (shown in Fig. 27) in which Y8a is drawn inward from the outer surface Y4a2. The operation of the first operation section Y14 is performed by being transmitted via a motion conversion mechanism YD1 (shown in FIGS. 21 and 28). The motion conversion mechanism YD 1 is rotatably supported by a link frame Y 9, one end of which is rotatably connected to the pushing member Y 8, and a seat support Y 4 a. M A rotating arm Y10 having a rotating end rotatably coupled to the other end of Y9, and one end coupled to a rotating end of the rotating arm Y10. A link wire YW1a for transmitting the operation of the first operation section Y14 and rotating the rotating arm Y10 is provided.

 Then, when the upper frame Y5d is in a standing posture (shown in FIG. 16) with respect to the lower frame Y5c, the first operation unit Y14 is operated. When the pressing member Y8 is driven to the pressing position, the pin Y7 is inserted across each of the through holes Y5dl and Y5cl, and the back Y5 cannot be tilted. The rotation is prohibited. When the reverse operation is performed, the pin Y7 is pulled out of the recess Y5dl of the upper frame Y5d by the coil spring YS2, and the back Y5 is pulled out. It is in a rotation permissible state in which it can be tilted.

In order for the pin Y7 to be pulled out of the through hole Y5d1 of the upper frame Y5d, the pin Y7 must be inserted outside the seat Y4a. The length of pin Y7 is set so that it is located inside the side. In other words, in order for pin Y7 to come out of through-hole Y5d1 of upper frame Y5d, it must be inserted into pin 揷 escape hole Y4a1. However, as shown in Fig. 16 and Fig. 17, this pin 揷 hole Y4 al has the back seat Y4 and Y5 in the back seat locking function. Only when in the normal use position, the lower frame Y5c side through hole Y5c1 overlaps the side view and the back seats Y4, Y5 are in positions other than the normal use position. Then, the recess Y 5 d 1 and Y5c1 do not overlap in side view. Therefore, when the back seats Y4 and Y5 are in positions other than the normal use position, the pin Y7 is used to exert the back tilting function, so that the pin Y7 is pressed into the recess Y5dl of the upper frame Y5d. However, even if you try to pull it out, the anti-insertion end surface of pin Y7 does not come off against the outer surface Y4a2 of seat support Y4a, and in this state, the function of tilting back is exhibited. No.

 Further, the first operation unit Y 14 is used to switch between the free Z locking state of the first gas spring YGS 1 and the switching of the pressing position Z of the pressing member Y 8 to the non-pressing position. In this embodiment, when the first operation unit Y14 is operated in a fixed direction, the first gas spring YGS1 is set to a free state. When the pressing member is positioned at the pressing position and the first operation unit Y14 is operated in the opposite direction, the first gas spring YGS1 is locked. Then, the pressing member Y8 is positioned at the non-pressing position.

 Next, as shown in Fig. 16, the back seat boundary movement function is a function that can change the inclination angle of the rear part of the seating surface and the length of the front and rear protruding parts of the lower part of the backrest surface. 4 Use a tilting body Y12 which is arranged to be tiltable to the rear of a and a lamp support arm Y13 integrally provided at the rear end of the tilting body Y12.

The tilting body Y12 is a pair of left and right frame-like members extending under the rear end of the cushion or the like constituting the seating surface Y4b and extending below the front end. To the back support rod Y5 (lower frame Y5c) via the support shaft Ytl. Yes. Then, the lower position YL (indicated by the solid line in FIG. 16) where the rear part Y 4 bl of the seating surface is substantially flush with the front part Y 4 b 2 of the seating surface, and the rear part Y 4 b 1 of the seating surface It is tiltably supported between an upper position YU (shown by a two-dot chain line in Fig. 16) where the rear end is higher than the front end.

 The lamp support arm Y13 is a frame-like body that is bent at a substantially right angle from the rear end of the tilting body Y12 and extends integrally from the side, as viewed from the side. The tension member Y5b to be formed is supported from left and right. Then, as the tilting body Y1 2 moves from the lower position YL to the upper position YU, it protrudes forward, and the lower part of the backrest surface protrudes forward while increasing the tension of the tension member Y5b at that portion. Let The distal end of the rubber support arm Y13 is provided with a bent portion Y13a which is bent in an arc shape toward the rear, so that a feeling of hitting the hip bone is improved.

Then, in the present embodiment, a switching mechanism YK5 for switching the operation / non-operation of the back seat boundary portion moving function is provided. By operating the switching button YB5 provided at the end of the second gas spring YGS2, the switching mechanism YK5 is fixed in a stretchable free state and length. It is configured using a second gas spring YGS2 which is an elastic member that can be switched to a locked state. Then, one end of the second gas spring YGS2 is turned around the connecting axis Yt1 between the back support Y5a (more specifically, the lower frame Y5c) and the seat Y4a. It is movably connected and In this embodiment, the other end of the tilting body Yl2 is rotatably connected to a portion deviated from the connecting axis Yt5 with the back support rod Y5a in the tilting body Yl2. When the second gas spring YGS 2 is in a free state, a force for tilting forward is applied to the tilting body Y 12 by its extension force. . Further, the switching button YB5 is connected to a second operation section Y15 described later via a link wire YW2, and the operation of the second operation section Y15 is performed. Therefore, the state of the second gas spring YGS 2 can be switched to move or deform the boundary of the seat, and the state of fixing the boundary of the seat in a desired shape. It is designed to be switched at once.

 The seat elevating function is to raise and lower the back seat Y4, Υ5, and the column Υ2a, which constitutes the base leg Υ2, is connected to the third gas spring YGS3 (see Fig. 22). ), The length of the column Y2a is changed by the expansion and contraction of the third gas spring YGS3, and the back seats Y4 and Υ5 are raised and lowered. The switching operation of the third gas spring YGS3 is performed by a fourth operation unit 17 described later.

 However, in the present embodiment, as shown in FIG. 22, the first operation section Υ14 to the fourth operation section Υ17 are sequentially moved from the rear to the front in this order. They are arranged in a line in the front and rear, and are gathered and arranged below the right edge of the seat.

As shown in FIGS. 20 to 25, each of the operation units Yl4 to Y17 has a rectangular thin plate shape and has the same shape as each other except for the base end. is there . Then, the seat Y 4 a is fixed to The base end is pivotally supported around a horizontal axis extending back and forth by the fixed operating section support frame Yl8, and the operating end is the distal end in a horizontal posture. Is set to protrude outward. In the same horizontal position, the operating ends are also at the same height. The rotation axes of the operation units Y14 to Y17 are set to be on the same line.

As described above, the first operation unit Υ 14 switches the locking function between the operation state and the non-operation state, and sets the back seat で at a desired locking angle. While it is for fixing 4 and Υ5, it is also for switching between the activation and deactivation of the tilting function. Then, as shown in Fig. 23, the operating end is protruded outward (solid line in Fig. 23), and from this horizontal posture, the operating end is turned downward. A stable toggle operation is performed in two postures, that is, the vertical posture (dashed line in Fig. 23) and the vertical posture. Specifically, the connecting point Y14a of the link wire YW1 with respect to the first operating section Υ14 is deviated from the rotation center Y19 of the first operating section Y14. As the first operation unit Y14 rotates between the horizontal position and the vertical position, the first unit Y14 is mounted on the operation unit support frame Y18. The fixed point Y18a1 is set to a position across a virtual line connecting the rotation center Y19 of the first operation unit Yl4 with the rotation center Y19. A force is always applied to the link wire YW1 in a direction in which the first operation portion Y14 is pulled inward by an elastic member or the like (not shown). The above-mentioned toggle They are working. In the horizontal position, the locking function is not activated, and in the vertical position, the locking function is activated. The link wire YW1 branches off midway to become YWla and YWlb, which are connected to the rotating arm Y10 and the first gas spring YGS1, respectively. In addition, the top surface of the tip is partially provided with unevenness YQ so that it can be recognized by a finger.

 As described above, the second operation section Υ15 is used to switch the operation of the movement function of the back seat boundary portion and the non-operation thereof, and to fix the back seat boundary portion in a desired form. Therefore, it is connected to the operation button of the second gas spring YGS 2 via the link wire YW 2. This is urged by an elastic member such as a panel (not shown) so as to be in a horizontal posture in a natural state where no external force is applied. Performs a touch-like operation. However, in this horizontal position, the second gas spring YGS2 is fixed. Then, as shown in FIG. 24, when the operator rotates the end of the second operation portion Υ15 upward against the urging force, the operator operates the second gas spring. The tilting body Υ12 and the lumbar support arm 313 can be tilted when the YGS 2 is in a free state. On the lower surface of the distal end portion, there are provided irregularities YQ partially so that the finger can recognize it.

The third operation unit Υ16 shown in FIG. 25 is, as described above, the front moving ends of the back seats 4 and Υ5 by the four-side link mechanism YK1 and the seating surface Y4. Normal use position where b is almost horizontal It is intended to switch between the seating position and the most forwardly inclined position where the seating surface Y4b is slightly inclined forward. Specifically, if the seat is in the horizontal position, the seating surface Y4b can be set to the normal use position, and if the seat is in the vertical position, the seating surface Y4b can be set to the forward tilt position. Has been set.

 As described above, the fourth operation section Y17 is for adjusting the height of the back seats Y4 and Y5, and is an operation button of the third gas spring YGS3. Is connected via a link wire YW4. In a natural state where no external force is applied, this is urged by an elastic member such as a spring (not shown) so as to be in a horizontal posture, and is not provided. Performs a switch-like operation. However, the third gas spring YGS3 is fixed in this horizontal posture. Then, when the operator rotates the end of the fourth operating portion Y17 upward against the urging force, the third gas spring YGS3 is brought into a free state. Therefore, it is configured so that the back seat Y4, Υ5 can be moved up and down. Further, the lower surface of the end of the fourth operation unit 17 is partially provided with unevenness so that it can be recognized by a finger.

Therefore, according to the present embodiment, since the operation units Υ14 to Υ17 are collectively arranged, the position is easy to understand, and the operation in the multifunctional chair Υ1 is particularly easy. Can be improved. Furthermore, for example, it is possible to simultaneously operate a plurality of operation units Υ14 to Υ17 with one hand, thereby providing an unprecedented use method. . The height of each operation unit Υ14 to Υ17 in the horizontal position is the same. Therefore, the operating status of the operated operation units Υ14 to し た 17 can be easily recognized by comparing with the positions of the other operation units Y14 to Y17.

 Note that the present invention is not limited to the above-described embodiment, and the operation unit is not limited to the above four. For example, if a function is added that allows the seating surface to slide back and forth, operability can be improved by providing the operation unit for this function at the same height as the existing operation unit. It can be improved. At that time, depending on the mounting position of the new operation unit, the relative distance between the operation units may vary due to the operation of the slide or the like.

 Further, the shape of each operation section does not need to be the same, and Φ; may be changed, and it is needless to say that the arrangement intervals are not limited to equal intervals.

<Third embodiment>

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 33 to 44. FIG. FIG. 33 and FIG. 34 show a side view and a front view of a chair 1 showing an embodiment of the present invention, respectively.

As shown in Fig. 35 to Fig. 37, this chair 1 has a base leg 2 supporting a back 5 and a seat 6, so that the use posture is suitable for office work and the like. In addition to being able to take a position, the base leg 2 must be able to take a posture suitable for rest and re-reflection as appropriate. Or, between the base leg 2 and the back 5, the seat 6, etc., the lifting mechanism for adjusting the height of the back seat, and the back 5 and the seat are linked so that the mouth is locked. Locking mechanism Q, a backrest tilting mechanism R that tilts only the upper part of the back 5 backward for stretching, etc., and for selectively pressing the lumbar bone A backrest lowering mechanism S to be used is provided.

 More specifically, the base leg 2 has a rotating shaft protruding upward from the center of the leg blade, so that the seat and the backrest supported thereon are rotated. It can be turned around the shaft. The elevating mechanism P incorporates a gas spring 21 into the rotation shaft of the base leg 2 and operates the gas spring 21 as appropriate to move the back seat. It is designed to be able to lock to any of the vertical positions.

 The back 5 is provided with a lower backrest frame 50 and an upper backrest frame 55, so that both frames 5005 are both inside the link element 7b. It is rotatably attached to a rotating shaft 72 provided on the portion.

 The seat 6 can be detachably attached to the seat 4. On the other hand, the locking mechanism Q connects the support 3 attached to the base leg 2, the seat 4 supporting the seat 6, and the connection between the support 3 and the seat 4. Mainly a four-sided link mechanism with unequal sides consisting of link elements 7a and 7b, and a gas spring 31 for fixing the back 5 at an appropriate position. It is composed of

The support base 3 has a V-shape composed of a rigid member such as an aluminum die cast. It is fixed and the tip protrudes obliquely upward. On the lower surface of the central part of the hypotenuse of the support 3, a torsion bar 70 capable of accumulating and releasing the elastic force in the torsion direction through the rotating shaft 71 is provided.

 The link element 7a is rotatably mounted at one end in front of the support base 3 via a rotation shaft 30 and at the other end on the front back surface of the seat 4 via a rotation shaft 60. Since it is a plate-shaped member mounted as possible, at least the rotating shaft 60 is detachable from a bearing provided on the seat 4.

 One end of the link element 7 b is fixed to the rotation shaft 71 of the torsion bar 70 provided at the center of the hypotenuse of the support base 3, and the other end is provided at the rear end of the seat 4. Since it is rotatably connected to the rotating shaft 79, this link element 7b usually has the lower backrest frame 50 and the upper backrest frame 55 described above on the rotating shaft. 7 It is one that is fixed integrally with the rotation function of the two rotations stopped, and can rotate together with the link element 7b around the rotation shaft 71 once.

 The gas spring 31 is provided between the link element 7a and the base 3, and is selectively fixed to the link element 7a. Thus, the entire four-side link mechanism is locked.

The upper backrest tilting mechanism R functions by allowing the rotation of the rotation axis 72 of the upper backrest frame 55 twice. It comprises a locking mechanism r, a screw member 73 and a force. As shown in FIG. 38, the locking mechanism r includes a hole 77 provided above the link element 7b and a bracket provided in the upper frame 55 of the backrest. The hole 551, which is provided in the hole 551, and the hole 551, which is usually disposed at a position straddling both the holes 77, is selectively pulled out from the hole 551, and It is composed of a backrest upper frame 55 and a pin 76 for releasing the constraint between the link element 7b. Inside the bracket 550 located inside the lower end of the backrest upper frame 55, there is a bracket 7 bl of the same shape so as to be integrated with the link Ίb. The brackets 550 and 7b1 are superimposed, and the hole 77 is positioned inside the hole 551, and the pin 76 Is inserted. When the pin 76 is inserted into the holes 77 and 550, the link element 7b and the upper frame 55 are restrained. Then, the pin 76 is pulled out of the hole 551, thereby releasing the above restraint and lifting the backrest upper frame. Only 5 5 can rotate independently with the rotation axis 72 as the center.

In a state where the pin 76 is inserted, the pin 76 is pressed against the surface 76a by the pressing member 9, and the pressing member 9 is further pressed. It is connected to the motion conversion mechanism D1 for attaching and detaching the component. The motion conversion mechanism D 1 is rotatably supported by the link frame 101, one end of which is rotatably connected to the pressing member 9, and the seat 4, and the link frame 10. Rotation with the pivot end pivotally connected to the other end of 1 Arm 102

 The X'-need member 73 is for providing elasticity to the upper frame 55 of the backrest when tilted, so that a concave portion 74 is provided on the lower surface of the upper end of the link element 7b. One end of the spring member 73 is housed and fixed in the recess 74, and the other end is attached to the back frame 55, and the other end is attached to the panel member 73. Therefore, the backrest upper frame 55 is pressed in the upright direction.

 Further, since the lower backrest tilting mechanism S uses the lower backrest frame, the lower backrest tilting mechanism S can press the lower frame forward with the rotation shaft 72 as a fulcrum. A gas spring is provided at the position.

 However, in order to selectively utilize the above mechanisms, the first operating section 43 a and the second operating section 43 as shown in FIG. b and the third operation unit 43c are provided in a group. The first operation part 43 a is for raising and lowering the seat part 6, and the second operation part 43 b is for tilting only the backrest lower frame 50 backward. The third operating section 43c is for locking the seat 6 and the upper frame 55 and the lower frame 50 in conjunction with each other. . Further, when the third operation portion 43c is operated downward during non-locking, only the upper frame 55 can be tilted.

Gas spring 21 for raising and lowering the back seat, gas spring 54 for tilting the lower part of the backrest, and back The gas spring 31 for tilting the upper and lower parts of the leaning includes a first operation receiving unit which is an operation receiving unit which is a mechanism for directly operating each of the above mechanisms. B 1, second operation reception unit B 2, and third operation reception unit B 3 are provided. The first operation receiving section B 1, the second operation receiving section B 2, and the third operation receiving section B 3 are buttons, respectively, and the gas springs 21, 5 are provided according to the state of the button. 4, 31 are locked or unlocked. In addition, the motion conversion mechanism D1 connected to the pin 76 for releasing the constraint between the upper frame 55 and the link element 7b described above serves as a fourth operation receiving unit. It also has functions.

 In the present embodiment, the operation units 43a to 43c and the operation reception units B1 to B3D1 are connected by connection means LW1, LW2, LW3, and LW4, respectively. I'm sorry. FIG. 40 shows a plan view around the connecting portion K between the connecting means LW 1, LW 2, LW 3, LW 4 and the operating portions 43 a to 43 c, and FIG. 41 shows a perspective view thereof. Shown respectively.

 The connection means LW 1, LW 2, LW 3, and LW 4 are link wires LW 11, LW 21, LW 31, LW 41, and their link wires, respectively. Tubes LW12, LW22, LW32, which are route-defining means for passing LW11, LW21, LW31, and LW41 through each other and defining the route, respectively. , LW 42 and power.

The link wire LW 11 has one end corresponding to the first operation unit 43 a and the other end corresponding to the first operation receiving unit B 1. They are connected. Hereinafter, the link wire LW 21 is connected to the second operation section 43 b and the second operation reception section B 2, and the link wire LW 31 is connected to the third operation section 43 c and the third operation section. The end of the link wire LW 41 is connected to the third operation unit 43 c and the fourth operation reception unit D 1, respectively.

 Tubes LW12, LW22, LW32 and LW42 have their both ends fixed to seats 4 and the like.

Further, in the present embodiment, the movement of the first operation unit 43 a and the third operation unit 43 (: is converted into the horizontal movement of the first connection unit 1 and the third connection unit LW 3. Conversion members R 1, R 3 are interposed between the first operation section 43 _& and the first connection means 1 and between the third operation section 43 c and the third connection means LW 3, respectively. ing.

 Regarding the principle of motion conversion using the motion conversion members R 1 and R 3, a typical example is a case in which the motion conversion member R 3 is combined with a third operation section 43 c and a third connection means LW 3. This is briefly described below.

 The operation conversion member R 3 is rotatably supported by a bracket-shaped support portion 47 set on the seat 4 side, and is shifted from its rotation center CT 3. The part CT2 is rotatably and slidably coupled to the part 43c1 deviated from the rotation center CT1 force of the third operation part 43c.

Specifically, a shaft is protruded from the portion CT2 of the motion conversion member R3, and the shaft is fitted into a groove formed in the portion 43c1 of the third operating portion 43c, and this is done. Part CT 2, 4 Between 3c1, the motion conversion member R3 and the third operation portion 43c are rotatably and slidably coupled to each other. The relationship between the groove and the shaft may be reversed.

 A link forming a third connection means LW3 is provided at the wire connection portion R31 set at a position deviated from the rotation center CT3 and the operation portion connection portion CT2. One end of wire LW31 is connected.

 Further, the motion conversion member R 3 is rotated by an angle larger than that of the third operation part 43, and the wire connection part R 31 is moved more than the rotation center CT 1 of the operation part. The movement of the operation unit is efficiently converted into the movement of the link wire LW31 in the horizontal direction by moving the operation unit in the horizontal direction.

 On the other hand, the wire connection portion R 31 is also connected to one end of a link wire LW 41 constituting the fourth connection means LW 4, and the link wire LW The same effect is achieved for the horizontal movement of 41.

 Since the motion converting member R 1 has the same configuration, the description is omitted.

 The first connection means LW 1, the second connection means LW 2, the third connection means LW 3, and the fourth connection means LW 4 are sequentially moved up and down the back seat, tilted only at the lower part of the backrest, and rocked. It corresponds to the swinging motion and the tilting motion of only the upper part of the backrest. '

Then, in order to make it easier for the occupant to grasp the types of the plurality of operation sections 43a to 43c, for example, the position of A first operation section 43a to 43c for operating each part of the chair 1 is arranged upward from above, and further, the operation sections 43a to 43c are formed in a flat plate shape. A guide indicating the operation site is displayed on the upper surface.

 At this time, the third operating section 43c for locking the seat 6 and the upper frame 55 of the backrest and the entire lower frame 50 of the backrest should be horizontal. The state can be switched between the down state and the down state, and all of the operation sections 43a and 43b except the third operation section 43c are naturally. A force is applied by a spring or the like so as to be horizontal.

 Next, the basic operation of the chair 1 configured as described above will be described.

 <Locking operation>

 In a state where all the operation parts 43a to 43c are horizontal (initial state), the gas spring 31 provided below the seat part 6 is in a free state. . At this time, as shown in Fig. 35, the pin 76 is inserted into the hole 551, which is formed in the upper frame 55, and the link element 7b and the back are inserted. The leaning upper frame 55 can be integrally tilted rearward about the rotating shaft 72 as a unit. Then, as the backrest upper frame 55 tilts rearward, the four-sided link mechanism is deformed, and the seat 6 also tilts rearward and downward, as shown in FIG. 37. Perform the locking action as shown. The state in which this operation is performed is shown by the two-dot chain line in FIG.

On the other hand, the third operation unit 43 When the gas spring 31 is tilted downward, the fixed state of the gas spring 31 provided below the seat 6 is maintained, and the backward tilt angle is maintained in that state.

Tilt movement of only the upper part of the backrest>

 By lowering the third operation unit 43c downward from the initial state, the link wire LW constituting the third connection means LW3 as shown by the two-dot chain line in FIG. 44 is obtained. 3 1 is pushed in, and the state of the third operation receiving section B 3 is changed in conjunction with this, and the gas spring 31 provided below the seat 6 is locked to lock the four sides. The movement of the locking mechanism is fixed. Then, the link wire LW 41 constituting the fourth connection means LW 4 is also pushed in, and the rotation arm 102 is rotated, so that the fourth operation reception means FIG. The link frame 101 is moved by the motion conversion mechanism D1 of the first pinion, and the pressing member 9 moves away from the pressing surface 76a of the pin 76 in conjunction with the link frame 101, and the spring S1 The pin 76 is removed from the backrest upper frame 55 by the action of the backrest upper frame 55, and the seat 6 and the backrest lower frame 50 are thereby removed. With the backrest fixed, the backrest upper frame 55 should be elastically tilted backward. The state in which this operation is performed is shown by the two-dot chain line in FIG.

Tilt movement of the lower part of the backrest only>

When only the lower frame 50 of the backrest is positioned rearward, the corresponding second operation section 43 b is pulled up to allow the lower frame 50 shown in FIG. As shown by the dashed line, the link wire LW 2 1 constituting the second connection means LW 2 is drawn out, In conjunction with this, the state of the button, which is the second operation receiving section B 2, changes, and accordingly, the gas spring 54 connected to the lower backrest frame 50 is fixed. The state is released. This allows the lower frame 50 of the backrest to rotate, and the link by returning the second operation unit 43b to the original position at the predetermined position. The wire LW 21 is pushed down to its original position, and in conjunction, the second operation receiving section B 2 returns to its original state, fixing the gas spring 54 and fixing the backrest lower flange. Frame 50 is fixed in that state. The state in which this operation is performed is indicated by the two-dot chain line in FIG.

<Elevation operation>

When the first operation section 43a is not operated, the gas spring 21 is locked, and the back seat is fixed at a certain elevating position. When the first operation unit 43a is pulled up from this position, the link wire LW11 constituting the first connection means LW1 is turned on as shown by the two-dot chain line in FIG. When the button is pulled out and interlocked with it, the state of the button, which is the first operation receiving section B1, changes, and the lock of the gas spring 2.1 is released accordingly. The back seat can be moved up and down within a predetermined range with the expansion and contraction of the gas spring 21. Then, when the first operation unit 43a is returned to the original horizontal state, the link wire LW11 is pushed down to the original position, and the first operation reception unit B1 is interlocked with the link wire LW11. The original state is restored, and the gas spring 21 is locked, so that the height of the back seat can be fixed. The state in which this operation is performed is shown by the two-dot chain line in FIG. 38. However, the chair 1 according to the present embodiment adjusts the operation range of the operation reception units B 1 to B 3 and D 1 that operate in response to the operations of the operation units 43 a to 43 c. The connecting parts LW l, LW 2, LW 3, LW 4 are provided with adjusting parts AJ 1, AJ 2 AJ 3, AJ 4, and the adjusting parts AJ 1, AJ 2, AJ 3, AJ 4 are provided. They are collectively arranged in a predetermined area.

 These adjustment units AJ 1, AJ 2, AJ 3 AJ 4 will be typically described by taking the first adjustment unit AJ 1 as an example. The first operation unit of the tube LW 12 is described below. By changing the fixed position of the end on the side of the part 43a, the path is changed, and the path of the link wire LW11 passing indirectly through the inside is changed. It is a thing. This changes the effective length of the link wire LW11, and the operation of the first operation unit 43a causes the operation of the operation reception unit B1 to be in the proper range. To be able to do it. Specifically, the first adjusting portion AJ 1 includes nuts LW 1 2 2 and LW 1 2 3 which sandwich a mounting wall 4 61 suspended from the lower portion of the seat 4 from both sides. The tube LW12 is formed at one end of the tube LW12, and serves as a screw portion LW121, which is screwed into the nut.

Then, the nuts LW122 and LW123 are screwed back and forth with respect to the thread part LW122, thereby fixing the end fixing position of the tube LW122. I try to change it. In addition, the 2nd adjustment unit AJ2, the 3rd adjustment unit AJ3, the 4th adjustment unit AJ 4 has the same configuration as that of the first adjusting unit AJ 1.

 In the present embodiment, the mounting walls 46 1, 46 2, 46 3, and 46 4 are provided in a predetermined area in order to collectively arrange all the adjusting units AJ 1, AJ 2, AJ 3, and AJ 4. It is provided in the adjustment area 46. The adjustment area 46 is set at a lower portion of the seat 4 and adjacent to the inside of the operation units 43a to 43c.

 The mounting walls 46 1, 46 2, 46 3, and 46 4 are orthogonal to the extending directions of the link wires LW 11, LW 21, LW 31, and LW 41, respectively. It is provided with notches 461a, 462a, 463a, and 464a, respectively. Then, on one side of the wall near the notch portions 46 1 a, 46 2 a, 46 3 a, and 46 4 a, a nut as shown in Fig. 41 is provided. LW 1 2 2 LW 2 2 2 LW 3 2 3 LW 4 2 3 is inserted into the counterbore 4 6 1 b, 4 6 2 b, 4 6 3 b, 4 6 4 b Each is provided.

 The adjustment method by the adjustment units AJ1 to AJ4 in the above configuration will be described below.

That is, the operation accepting sections B 1, B 2, B 3 are operated by the operating sections 43 a, 43 b, 43 c connected through the connecting means LW 1, LW 2, LW 3, LW 4. And link wires LW 11, LW 21, LW 31, and LW 41 are too pushed or pulled out when operating D1 and D1 Even if the user operates the operation sections 43a43b and 43c, the operation reception sections B1, B2, B3, and D1 do not operate. Therefore, in order to operate the operation units 43a, 43b, and 43c so that the operation reception units B1, B2, B3, and D1 operate properly. Change the tube path using the adjustment units AJ1, AJ2, AJ3, and AJ4 to adjust the pull-out width of the link wires LW11, LW21, LW31, and LW41. Adjust.

 The specific procedure of the adjustment will be described by taking, as an example, a set of the first operation section 43a, the first connection means LW1, the first adjustment section AJ1, and the mounting wall 461. First, the link wire LW11 constituting the first connection means LW1 is made to pass through the notch 461a.

 Next, the two nuts LW122 and LW123 constituting the first adjusting unit AJ1 are advanced and retracted with respect to the thread member LW122 of the tube, and the position is set to the first position. Adjustments are made so that the operation of the first operation receiving section B1 is performed correctly by the operation of the operating section 43a, and these nuts LW122, LW123 are provided. Between the mounting walls 4 6 1. The second operation unit 43 b, the second connection means LW2, the second adjustment unit AJ2, the mounting wall 462, and the third operation unit 43c, the third connection means LW3, the fourth The adjustment procedure is the same for the set of the connection means LW4, the third adjustment part AJ3, the fourth adjustment part AJ4, the mounting wall 463, and the mounting wall 646.

On the other hand, as shown in FIG. The cover K can be covered with a cover C on the boundary part K between the controller 46 and the operation parts 43a, 43b, 43c and the connecting means LWl, LW2, LW3, LW4. You can do it.

 The cover C is provided with an operation part penetrating window C 1 a for penetrating the first operation part 43 a, an operation part penetrating window C 1 b for penetrating the second operation part 43 b, and a third operation part. Each of the operating part penetration windows C 1 c for penetrating 4 3 c is provided, and the seat 4 or the resin seat that covers the lower surface of the seat 4 is provided at a plurality of appropriate places such as the peripheral wall thereof. Claws C 21, C 22, C 23, and C 24 are provided for fixing to the receiving cover CZ.

 The operation part penetration windows CI a, C lb, and C lc are respectively substantially perpendicular to the extension direction of the operation parts 43 a, 43 b, and 43 c, and have a width that extends through the operation part. The window C 1 a is substantially the same as the first operation unit 43 a, the operation unit penetrating window C 1 b is substantially the same as the second operation unit 43 b, and the operation unit penetrating window C 1 c is substantially the same as the third operation unit 43 c. In addition, the height is set so as to substantially correspond to the operation range of the portion corresponding to the window in each operation unit.

 To fix the cano C to the seat 4, the claws C21, C22, C23, C24 are engaged with the seat 4 or the seat can CZ.

As described above, in the chair 1 according to the present embodiment, the adjustment units AJ 1 AJ 2, AJ 3, and AJ 4 are all collectively arranged in the adjustment area 46. A. From the 46, take out the adjusting units 81, 82, 8] 3 and 84. In addition, the adjusting sections AJ1, AJ2, AJ3, and AJ4 can be adjusted at a time, and the assembly work can be prevented from becoming complicated.

 Also, since the operation units 43a, 3b, 43c are collectively arranged and located in the vicinity of the adjustment units AJ1, AJ2, AJ3, AJ4, the operation units 43a, 43 The correspondence between 3b and 43c and the adjustment units AJ1, AJ2, AJ3, and AJ4 is easy and the operability for the occupant can be improved.

 In addition, the adjustment units AJ1, AJ2, AJ3, AJ4 and the adjustment units _1_1, 822, VIII: [3, 8.4 and the first operation units 43a, 43b, 43c A single cover C is provided to cover the boundary between the two and simultaneously, so that these can be prevented from external force and the appearance can be adjusted by only one cover C, and the number of parts can be reduced. In addition, it is possible to reduce the manufacturing cost or to simplify the assembling work.

The present invention is not limited to the above embodiment. For example, the operation unit and the adjustment unit may be arranged separately, and it is not necessary to arrange the operation units collectively. In addition, the force bar can be made to cover only the adjusting part or can be omitted. Further, the position of the adjusting portion may be other than the lower portion of the seat, for example, an upper portion of the armrest. The connection means may be a link other than the link wire and the tube, for example, a rigid link or the like. Industrial applicability As described above, according to the first aspect of the present invention, the operation units are collectively arranged with a simple configuration, for example, by attaching a plurality of operation units to one rotating shaft. As a result, since the operation mode of each operation unit is the same, operability can be improved particularly in a multifunctional chair. In addition, it will be possible to provide unprecedented usage, such as operating multiple operating units simultaneously with one hand.

 Further, if the two or more operation units are arranged below the side edge of the seat so that their rotation axes extend forward and backward, the seated person can lower his hand while sitting. If extended, these operation parts can be naturally touched, and the operability can be further improved.

 In particular, if the two or more operation units are each formed in a plate shape and can maintain a horizontal posture, the usability and operability will be more excellent.

 Furthermore, when two or more operation units are arranged in a group, it becomes difficult to determine which operation unit corresponds to which function and how to operate it. There is also a risk that However, if irregularities are provided on the surface of the two or more operation units, which are to be touched when operating in the predetermined operation direction, such a simple structure can be used. Can be avoided.

In addition, if the two or more operation units have the same shape or substantially the same shape as each other, a common component is used. And contribute to ease of production and lower prices.

 Further, according to the invention set forth in claim 6, since the operation units are collectively arranged, the position can be easily identified, and the operability can be improved particularly in a multifunctional chair. You. In addition, it will be possible to provide new ways of using, for example, the simultaneous operation of multiple operating units with one hand.

 Further, if the two or more operation units are arranged in front and rear and arranged below the side edge of the seat, if the seated person extends his hand downward while sitting, he or she naturally touches these operation units. This makes it possible to achieve superior usability and operability.

 Furthermore, if the arrangement order of the two or more operation units is determined based on the arrangement order of the members that perform the functions that are the operation targets of each operation unit, then for the occupant, It is easy to understand which function the operation unit corresponds to, and it is easy to remember and at the same time easier to operate, as well as to improve usability and operability. The two or more operation units are arranged so as to be at the same height, have the same or substantially the same shape, or have a plate-like shape and can maintain a horizontal posture. In addition, it is preferable that the base end be rotatably supported on the seat so that the tip can move up and down.

Furthermore, when two or more operation units are collectively arranged in this way, which operation unit corresponds to which function and how to operate it There is also a risk that the sickness will be lost. However, if a concave / convex portion is provided on the surface of the two or more operating units and is touched when operating in a predetermined operating direction, such a surface is formed as described above. It can be avoided with a simple structure.

 Further, according to the invention according to claim 12, the chair having a plurality of operating mechanisms such as an elevating mechanism and a locking mechanism for adjusting the height of the back seat is provided. An operation unit for performing an operation for operating the operation unit; an operation reception unit that is a mechanism for directly operating each of the mechanisms; and a connection unit that connects the operation unit and the operation reception unit. And at least two or more of the adjustment units provided in the connection means for adjusting the operation range of the operation reception unit that operates upon receiving the operation of the operation unit. The configuration in which the adjusting sections are arranged collectively in a predetermined area allows the adjusting sections to be adjusted at one time, and also complicates the assembly operation. Can be prevented. As a result, it can benefit users and producers.

Claims

The scope of the claims

 1. In a chair that has multiple controls for mechanically adjusting the height of the back seat and the locking, two or more controls that are part or all of the controls. The parts are designed to be rotated around a predetermined rotation axis, and the rotation axes of the operation parts are arranged side by side on the same axis. Features chair.

 2. The chair according to claim 1, wherein the two or more operation units are arranged below a side edge of the seat such that their rotation axes extend forward and backward.

 3. The method according to claim 1, wherein the surface of the two or more operation units is provided with irregularities on a portion that can be touched when operating in a predetermined operation direction. Chair.

 4. The chair according to claim 1, wherein the two or more operation units have the same shape or substantially the same shape.

 5. The chair according to claim 1, wherein each of the two or more operation units has a plate shape and can maintain a horizontal posture.

6. In a chair that has multiple controls for mechanically adjusting the height of the back seat and the locking, two or more controls that are part or all of the controls. A chair characterized in that the parts are arranged and arranged in a predetermined area.

7. In chairs with multiple controls for height adjustment and locking of the back seat, some of the controls Or a chair characterized in that two or more operation parts in total are arranged in front and rear and arranged below a side edge of a seat.

 8. The chair according to claim 6, wherein the arrangement order of the two or more operation units is determined based on the arrangement order of members exhibiting the function to be operated by each operation unit. .

 9. The chair according to claim 6, wherein the two or more operation units have the same shape or substantially the same shape as each other.

 10. Claims 6, 7, 8, or 9, wherein irregularities are provided on the surface of the two or more operation units that touches when operating in a predetermined operation direction. Chair according to clause 9.

11. The claim 6, wherein the two or more operation units are capable of maintaining a horizontal posture, and the operation units are arranged so as to be at the same height in the state where the horizontal posture is maintained. A chair according to paragraph 7, paragraph 7, paragraph 8, paragraph 9 or paragraph 10.

1 2. Operate each mechanism in a chair that has multiple operating mechanisms such as a lifting mechanism and a rocking mechanism that adjusts the height of the back seat. An operation receiving unit that directly operates the mechanism; and a connection unit that connects the operation unit and the operation receiving unit; and an operation range of the operation receiving unit that operates by receiving an operation of the operation unit. A chair characterized in that, of the adjustment sections provided in the connection means for performing the adjustment of the above, at least two or more of the adjustment sections are collectively arranged in a predetermined area.

1 3. Place the adjustment unit near the operation unit related to the adjustment unit. The chair according to claim 12, wherein the chair is provided.

14. The chair according to claim 12 or 13, wherein the operation units are collectively arranged in a predetermined area.

15. The chair according to claim 12, further comprising a cover that covers the adjustment unit that is collectively arranged.

 16. The chair according to claim 15, wherein the cover also covers a boundary portion between the operation unit and the adjustment unit.

17. The chair according to claim 12, wherein the adjustment portion is arranged at a lower portion of the seat. .

 18. Claims 12, 13, 14, 15, 15, 16, wherein a link wire is used as the connection means. Or the chair according to paragraph 17.