WO2011057582A1

WO2011057582A1 - Bi-directional foldable stroller

Info

Publication number: WO2011057582A1
Application number: PCT/CN2010/078695
Authority: WO
Inventors: 高翔
Original assignee: 好孩子儿童用品有限公司
Priority date: 2009-11-13
Filing date: 2010-11-12
Publication date: 2011-05-19
Also published as: CN102666247B; CN102666247A

Abstract

A bi-directional foldable stroller with simple structure can be folded in both fore-and-aft and right-and-left directions during folding. A stroller frame (1) of the stroller includes a left framework (100), a right framework (200) and a cross connecting device (300) for connecting the two frameworks. Each framework is formed by a four-bar linkage which consists of a front wheel bracket (11,12), a push rod (13,14), a rear wheel bracket (15,16) and a seat supporting rod (17,18). The stroller is provided additionally with a foldable rigid reinforce (7) compared with the prior stroller. The rigid reinforce is arranged on the pair of rear wheel brackets or connected to the rear area of the pair of seat supporting rods. The pivot joints between the rigid reinforce and the rear wheel brackets or the seat supporting rods are positioned above the pivot joints between the rear part of the seat supporting rods and the rear wheel brackets. When the stroller frame is changed from the unfolding positon to the folding position, the left end of the rigid reinforce is closed to the right end thereof. The stroller has stronger rigidity, and the stability of the whole stroller can not be influenced even though the size of the pivot joint between the front wheel bracket and the push rod is designed to be smaller.

Description

Two-way folding cart

Technical field

The invention relates to a two-way folding cart.

Background technique

A bi-directional folding cart of the prior art, comprising a cart frame having a deployed position and a folded position, a wheel assembly disposed at a bottom of the cart frame, and for locking the cart frame to A locking device in the deployed position, the cart frame including a left side frame, a right side frame, and a lateral connection device laterally connecting the left side frame and the right side frame. The two-way folding of the folding cart is realized, and the left side frame and the right side frame are both four-link frame mechanisms, and the horizontal connecting device is a structure such as a cross bracing or a diagonal bracing. As shown in FIG. 14, the "four links" constituting the left side frame 100 include a left front wheel bracket 11, a left rear wheel bracket 15, a left seat support rod 17, and a left push rod 13. Among them, the left front wheel bracket 11 extends in the up and down direction, and the left front wheel assembly 2 is mounted on the lower end portion thereof. The left rear wheel bracket 15 also extends in the up and down direction, and the left rear wheel assembly 4 is mounted on the lower end portion thereof. The left seat support rod 17 extends in the front-rear direction, the front portion of the seat support rod 17 is rotatably coupled to the lower central portion of the left front wheel bracket 11, and the rear portion of the left seat support rod 17 is rotatably coupled to the left rear wheel bracket. 11 is in the lower part of the middle. The left push rod 13 extends in the up and down direction, and the lower end portion of the left push rod 13 is rotatably coupled to the upper portion of the left front wheel bracket 11 by a rotating shaft, the upper portion of the left rear wheel bracket 15 intersects with the left push rod 13, and both They are rotatably connected in a region where they intersect. In order to ensure that the left frame can meet the stability requirement when the folding cart is in use, in the folding cart, the left front wheel bracket 11 has a section above the area which is rotatably connected to the lower end of the left push rod 13. An extension portion 27 located below the lower portion of the partial left push rod 13 capable of preventing the left push rod 13 from crossing the left front wheel bracket 11 around the left front rod 13 and the left front wheel The rotation between the brackets 11 is rotated backward in the axial direction, so that the carter always stands behind the push rod during the running of the car, and because of the inertia, the state of pressing the left push rod backwards is maintained, so the above The first extension 27 can serve the purpose of "locking" the left side frame. For the same reason, the same is true for the right frame.

For the left side frame 100, when the entire cart frame is changed from the folded position to the unfolded position, the first extension portion 27 of the left front wheel bracket 11 and the lower portion of the left push rod 13 are gradually brought closer to each other. The gap is reduced, and the problem of pinching fingers or pinching clothes is easily generated between the first extension portion 27 of the left front wheel bracket 11 and the lower portion of the left push rod 13. Therefore, in order to reduce such drawbacks, it is conventional practice to reduce the size of the first extension portion 27 as much as possible, but this shortens the first extension portion, which in turn has the disadvantage of weakening the rigidity of the left side frame, thereby making the folding The cart became unreliable when it was implemented.

Summary of the invention

The technical problem to be solved by the present invention is to provide a safe and reliable two-way folding cart.

In solving the above technical problems, a technical solution adopted by the present invention is:

A two-way folding cart capable of folding in front, back, and left and right directions during a folding operation, the folding cart comprising a cart frame having an unfolded position and a folded position, disposed at the bottom of the cart frame Front wheel assembly and rear wheel assembly, the cart frame includes:

a pair of left and right front wheel brackets extending in an up and down direction, the front wheel assembly being mounted at a lower end portion of the front wheel bracket;

a pair of left and right rear wheel brackets extending in an up and down direction, the rear wheel assembly being mounted at a lower end portion of the rear wheel bracket;

a pair of left and right distributed seat support bars extending in a front-rear direction, the front portion of the seat support bar being rotatably coupled to the front wheel bracket, the rear portion of the seat support bar The rear wheel bracket is rotatably connected;

a pair of left and right distributed push rods extending in an up and down direction, the lower end portion of the push rod being rotatably coupled to an upper portion of the front wheel bracket via a rotating shaft, the upper portion of the rear wheel bracket The push rods intersect and the two are rotatably connected in a region where they intersect;

The horizontal connecting device, the front wheel bracket, the rear wheel bracket, the seat support rod and the push rod on the left side constitute a left side frame of the cart frame, and the front wheel bracket and the rear side are located on the right side A wheel bracket, a seat support rod, a push rod constitute a right side frame of the cart frame, and the lateral connection device is located between the left side frame and the right side frame of the cart frame and is used for connection Two side frames;

The cart frame further includes a foldable rigid reinforcement member having a left end portion and a right end portion, the left and right end portions of the rigid reinforcement member being rotatably coupled to the pair of the rear portions, respectively a wheel bracket is rotatably coupled to a rear region of a pair of the seat support bars, and a rotational connection point between the rigid reinforcement member and the rear wheel bracket or the seat support frame is located at the seat support a top of the rotational connection point between the rear portion of the rod and the rear wheel bracket; when the cart frame is changed from the deployed position to the folded position, the left end portion and the right end portion of the rigid reinforcing member are mutually Close together.

Preferably, the rigid reinforcement member comprises two hinged struts, and the two struts are provided with a locking mechanism, and when the locking mechanism is locked, the two struts are prevented from rotating relative to each other.

Preferably, the front wheel bracket further has an extension above the pivotal connection point with the lower end of the push rod, the extension being located below the lower portion of the push rod, the extension The push rod can be prevented from rotating over the front wheel bracket and rotating backward about the rotation between the push rod and the front wheel bracket.

Further, the extension has an opening toward the lower portion of the push rod, and at least a portion of the lower portion of the push rod is received in the opening when the cart frame is in the deployed position.

Preferably, the lateral connecting device comprises: a bottom lateral connecting unit comprising intersecting first and second rods, the first rod and the second rod rotating in a portion where the two intersect Connecting, the front portions of the first rod and the second rod are respectively rotatably connected to the lower portions of the pair of the front wheel brackets respectively by a rotating joint, and the rear portions of the first rod and the second rod are connected Separatingly connected to a lower portion of a pair of said rear wheel brackets respectively by a rotary joint; a rear lateral connecting unit including intersecting third and fourth rods, said third rod and The four rods are rotatably connected at a portion where the two intersect, and the upper portions of the third rod and the fourth rod are respectively rotatably connected to the upper portion of the pair of the push rods by a rotating joint, the first The lower portions of the three rods and the fourth rod are rotatably coupled to a pair of the rear wheel brackets by a rotary joint, respectively.

The scope of the present invention is not limited to the specific combination of the above technical features, and other technical solutions formed by any combination of the above technical features or equivalent features thereof are also contemplated. For example, the above features are combined with the technical features disclosed in the present application, but are not limited to the technical features having similar functions, and the like.

Due to the use of the above technical solutions, the present invention has the following advantages over the prior art: the folding cart of the present invention is rigid, even if the size of the rotational joint between the front wheel bracket and the push rod is designed to be smaller, It also does not affect the stability of the entire cart frame.

DRAWINGS

Figure 1 is a perspective view of the first embodiment of the present invention (Embodiment 1);

Figure 2 is a perspective view of the present invention (Example 1);

Figure 3 is a front view of the present invention (Embodiment 1);

Figure 4 is a left side view of the present invention (Embodiment 1);

Figure 5 is a bottom view of the present invention (Embodiment 1);

Figure 6 is a perspective view of the first embodiment of the present invention (Embodiment 2);

Figure 7 is a perspective view of the second embodiment of the present invention (Embodiment 2);

Figure 8 is a front view of the present invention (Embodiment 2);

Figure 9 is a left side view of the present invention (Embodiment 2);

Figure 10 is a bottom view of the present invention (Embodiment 2);

Figure 11 is a schematic view of the cross bracing structure (under the unfolded position);

Figure 12 is a schematic view of the cross bracing structure (under the half-folded position);

Figure 13 is a schematic view of the cross bracing structure (under the folded position);

Figure 14 is a schematic view showing the structure of a two-way folding cart in the background art.

Among them: 1, cart frame; 2, left front wheel assembly; 3, right front wheel assembly; 4, left rear wheel assembly; 5, right rear wheel assembly; 6, bottom lateral connection unit; 7, rigid reinforcement; 8, the rear lateral connection unit; 11, the left front wheel bracket; 12, the right front wheel bracket; 13, the left push rod; 14, the right push rod; 15, the left rear wheel bracket; 16, the right rear wheel bracket; Left seat support rod; 18, right seat support rod; 21, first rod member; 22, second rod member; 23, third rod member; 24, fourth rod member; 25, first strut; Two struts; 27, first extensions; 28, second extensions; 29, locking mechanism; 100, left side frame; 200, right side frame; 300, transverse connection means.

detailed description

Embodiment 1:

The two-way folding cart as shown in FIG. 1 to FIG. 5 can be folded in the front, rear and left and right directions during the folding operation, and the main structure of the folding cart includes a cart frame having an unfolded position and a folded position. a pair of front wheel assemblies and a pair of rear wheel assemblies disposed at the bottom of the cart frame.

The cart frame is composed of a left side frame 100 like a four-bar linkage, a right side frame 200 like a four-bar linkage structure, a lateral connection device 300 connecting the left side frame and the right side frame, and a rigid reinforcement member 7.

The "four links" constituting the left side frame 100 include a left front wheel bracket 11, a left rear wheel bracket 15, a left seat support rod 17, and a left push rod 13. Among them, the left front wheel bracket 11 extends in the up and down direction, and the left front wheel assembly 2 is mounted on the lower end portion thereof. The left rear wheel bracket 15 also extends in the up and down direction, and the left rear wheel assembly 4 is mounted on the lower end portion thereof. The left seat support rod 17 extends in the front-rear direction, the front portion of the seat support rod 17 is rotatably coupled to the lower central portion of the left front wheel bracket 11, and the rear portion of the left seat support rod 17 is rotatably coupled to the left rear wheel bracket. 11 is in the lower part of the middle. The left push rod 13 extends in the up and down direction, and the lower end portion of the left push rod 13 is rotatably coupled to the upper portion of the left front wheel bracket 11 by a rotating shaft, the upper portion of the left rear wheel bracket 15 intersects with the left push rod 13, and both They are rotatably connected in a region where they intersect. In order to make the left side frame 100 satisfy the stability requirement when in use, the left front wheel bracket 11 further has a first extension portion 27 above the pivotal connection point with the lower end portion of the left push rod 13, the first extension portion 27 is located below the lower portion of the left push rod 13 , and the first extending portion 27 can prevent the left push rod 13 from rotating backward in the axial direction between the left push rod 13 and the left front wheel bracket 11 over the left front wheel bracket 11 . Thus, since the operator is always standing behind the push rod during the running of the car, and since the inertia will always maintain the state of pressing the left push rod backward, the first extension portion 27 can "lock" the left side frame. purpose. In order to enable the first extension portion 27 to better prevent the left push rod 13 from rotating backward, the first extension portion 27 has an opening toward the lower portion of the left push rod 13, and when the folding cart is in the deployed position, the portion of the left push rod 13 The lower part is housed in this opening.

The structure of the right side frame 200 is substantially the same as that of the left side frame 100. As shown, the right side frame 200 includes a right front wheel bracket 12, a right rear wheel bracket 16, a right seat support bar 18, and a right push rod 14. Among them, the right front wheel bracket 12 extends in the up and down direction, and the right front wheel assembly 3 is mounted on the lower end portion thereof. The right rear wheel bracket 16 also extends in the up and down direction, and the right rear wheel assembly 5 is mounted on the lower end portion thereof. The right seat support bar 18 extends in the front-rear direction, the front portion of the seat support bar 18 is rotatably coupled to the lower central portion of the right front wheel bracket 12, and the rear portion of the right seat support bar 18 is rotatably coupled to the right rear wheel bracket. The middle part of 12 is on the lower part of the area. The right push rod 14 extends in the up and down direction, and the lower end portion of the right push rod 14 is rotatably coupled to the upper portion of the right front wheel bracket 12 via the rotating shaft, and the upper portion of the right rear wheel bracket 16 intersects the right push rod 14 and both They are rotatably connected in a region where they intersect. In the right side frame 200, the right front wheel bracket 12 also has a second extension portion 28 above the pivotal connection point with the lower end portion of the right push rod 14, the second extension portion 28 being located below the lower portion of the right push rod 14. The second extension portion 27 can prevent the right push rod 13 from rotating backward in the axial direction between the right push rod 13 and the right front wheel bracket 11 over the right front wheel bracket 11 , and the second extension portion 28 has an opening It plays a similar role to the "first extension 27" and will not be described here.

A transverse attachment device 300 is located between the left side frame 100 and the right side frame 200 of the cart frame and is used to connect the two side frames. In the present embodiment, the lateral connecting device 300 includes a bottom lateral connecting unit 6 and a rear lateral connecting unit 8. Wherein, the main structure of the bottom lateral connecting unit 6 is a cross-fork structure, including the intersecting first rod 21 and the second rod 22, and the first rod 21 and the second rod 22 are rotatably connected at a portion where the two intersect. The front portions of the first rod 21 and the second rod 22 are rotatably coupled to the lower portions of the left front wheel bracket 11 and the right front wheel bracket 12 by a rotary joint, respectively, and the rear portions of the first rod 21 and the second rod 22 are also Rotatingly connected to the right rear wheel bracket 16 and the left rear wheel bracket 15 by a rotary joint, respectively. The rear lateral connecting unit 8 includes intersecting third rods 23 and fourth rods 24, and the third rods 23 and the fourth rods 24 are rotatably connected at a portion where the two intersect, the third rod 23 and the fourth rod 24 The upper portions are rotatably connected to the upper portions of the pair of left push rods 13 and right push rods 14 respectively through a rotary joint, and the lower portions of the third rod 23 and the fourth rod 24 respectively pass a rotary joint and the right rear wheel bracket 16 and left The rear wheel brackets 15 are rotatably connected.

The above-mentioned rotary joint refers to a member capable of achieving rotation in at least two different directions.

a rigid reinforcing member 7, which is foldable, has a left end portion and a right end portion, and a left end portion of the rigid reinforcing member 7 is rotatably coupled to a rear region of the left seat support rod 17, and the right end portion and the right seat support of the rigid reinforcing member 7 The rear regions of the rods 18 are rotatably connected. The rotational connection point between the left end portion of the rigid reinforcing member 7 and the left seat support rod 17 is located above the rotational joint between the rear portion of the left seat support rod 17 and the left rear wheel bracket 15, and the right end portion of the rigid reinforcing member 7 The rotational connection point with the right seat support bar 18 is located above the rotational connection point between the rear of the right seat support bar 18 and the right rear wheel bracket 16, ie the entire rigid stiffener 7 is located at the rear of the seat support bar and The rear wheel bracket is rotated above the rotating connection area. When the cart frame 1 is changed from the unfolded position to the folded position, the left end portion and the right end portion of the rigid reinforcing member 7 are brought closer together.

As shown in Figures 11-13, the rigid reinforcement member 7 includes two first and

second struts

25, 26 which are hinged, and the two struts are provided with a locking mechanism 29, when the locking mechanism 29 is locked, The first strut 25 and the second strut 26 are prevented from rotating relative to each other.

When the folding cart is in use, the locking mechanism 29 on the rigid reinforcing member 7 is opened, so that the first strut 25 and the second strut 26 can rotate relative to each other, so that the carter can flip the push rod forward, and simultaneously realize The folding cart is folded in the front, back and left and right directions.

Embodiment 2:

As shown in FIG. 6 to FIG. 10, the difference from the first embodiment is that the left end portion of the rigid reinforcing member 7 is rotatably connected to the left rear wheel bracket 15, and the right end portion of the rigid reinforcing member 7 is opposite to the right rear wheel bracket 16. Turn the connection. The rotational connection point between the left end portion of the rigid reinforcing member 7 and the left rear wheel bracket 15 is located above the rotational joint between the rear portion of the left seat support rod 17 and the left rear wheel bracket 15, and the right end portion of the rigid reinforcing member 7 The area of the rotational connection point with the right rear wheel bracket 16 is located above the rotational connection point between the rear portion of the right seat support bar 18 and the right rear wheel bracket 16, that is, the entire rigid reinforcement member 7 is a pair of seat support bars and The rear wheel bracket is rotated above the rotating connection area.

As described above, we have explained completely in accordance with the gist of the present invention, but the present invention is not limited to the above embodiments and implementation methods. A person skilled in the relevant art can make various changes and implementations within the scope of the technical idea of the present invention.

Claims

A two-way folding cart capable of folding in front, back, and left and right directions during a folding operation, the folding cart comprising a cart frame having an unfolded position and a folded position, and a cart mounted thereon a front wheel assembly and a rear wheel assembly at the bottom of the frame, the cart frame comprising:

The utility model is characterized in that the cart frame further comprises a foldable rigid reinforcing member having a left end portion and a right end portion, wherein the left and right end portions of the rigid reinforcing member are rotatably connected to each other The rear wheel bracket is rotatably coupled to a rear region of a pair of the seat support bars, and the rotational connection point between the rigid reinforcement member and the rear wheel bracket or the seat support frame is located at Above the rotational connection point between the rear portion of the seat support bar and the rear wheel support; the left end of the rigid reinforcement member when the cart frame is changed from the deployed position to the folded position Close to the right end.

2. The bi-directional folding cart according to claim 1, wherein said rigid reinforcing member comprises two hinged struts, and said two struts are provided with a locking mechanism, and wherein said locking mechanism When locked, the two said struts are prevented from rotating relative to each other.

3. The bi-directional folding cart of claim 1 wherein said front wheel bracket further has an extension above said pivotal attachment to said lower end of said push rod, said extension Located below the lower portion of the push rod, the extension can prevent the push rod from rotating backwards around the front wheel bracket and about the rotation between the push rod and the front wheel bracket.

4. A bi-directional folding cart according to claim 3 wherein said extension has an opening toward said lower portion of said push rod, at least partially when said cart frame is in the deployed position. The lower portion of the push rod is received in the opening.

5. The bi-directional folding cart of claim 1 wherein said lateral attachment means comprises:

a bottom lateral connection unit comprising intersecting first and second rods, the first rod and the second rod being rotatably connected at a portion where the two intersect, the first rod and the second rod The front portions of the rods are respectively rotatably coupled to the lower portions of the pair of front wheel brackets by a rotary joint, and the rear portions of the first and second rods are respectively coupled to a pair of the rear wheel brackets The lower portions are respectively rotatably connected by a rotating joint;

a rear lateral connecting unit comprising intersecting third and fourth rods, the third rod and the fourth rod being rotatably connected at a portion where the two intersect, the third rod and the third rod The upper portions of the four rods are respectively rotatably connected to the upper portion of the pair of the push rods by a rotary joint, and the lower portions of the third rod and the fourth rod respectively pass through a rotating joint and a pair of the rear wheel brackets Rotating in phase.