US20100192383A1 - Electric scissors - Google Patents
Electric scissors Download PDFInfo
- Publication number
- US20100192383A1 US20100192383A1 US12/695,438 US69543810A US2010192383A1 US 20100192383 A1 US20100192383 A1 US 20100192383A1 US 69543810 A US69543810 A US 69543810A US 2010192383 A1 US2010192383 A1 US 2010192383A1
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- United States
- Prior art keywords
- blade
- link
- movable blade
- shaft
- drive shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/08—Other tools for pruning, branching or delimbing standing trees
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/02—Secateurs; Flower or fruit shears
- A01G3/033—Secateurs; Flower or fruit shears having motor-driven blades
- A01G3/037—Secateurs; Flower or fruit shears having motor-driven blades the driving means being an electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B15/00—Hand-held shears with motor-driven blades
Definitions
- the present invention relates to electric scissors, used to prune branches of trees or the like, for cutting objects to be cut, such as the branches, by opening and closing the blades using a drive power of a motor.
- branches or the like have been pruned with scissors by opening/closing blades of scissors with a hand of the user.
- electric scissors are proposed that can cut objects to be cut, such as the branches, by opening/closing the blades using a drive power of a motor.
- Such electric scissors include a fixed blade and a movable blade being rotatable around a shaft serving as a fulcrum.
- a configuration referred to as a link type and a configuration referred to as a gear type are known as the configurations of systems for driving the movable blade.
- Link-type electric scissors are configured so that the movable blade thereof is formed into an L-shape, for example, having a cutting edge portion on one side of the movable blade with respect to the shaft on which the movable blade is supported and having an arm portion on the other side of the movable blade. Furthermore, the electric scissors have a ball screw for converting a rotation of a motor into a linear motion of a nut portion and a link for connecting the nut portion to the arm portion of the movable blade. With this configuration, the linear movement of the nut portion is transmitted to the arm portion of the movable blade via the link, and the movable blade is rotated around the shaft serving as a fulcrum (for example, refer to Patent Document 1).
- Patent Document 1 U.S. Pat. No. 5,002,135
- Gear-type electric scissors are configured so that the movable blade thereof has an arc-shaped gear disposed coaxially with a shaft on which the movable blade is supported and so that the rotation of a motor is transmitted to the movable blade using a mechanism in which a bevel gear and a spur gear or the like are combined (for example, refer to Patent Document 2).
- Patent Document 2 JP-A-11-128561
- the link-type electric scissors are characterized in that as the blades are closed, the cutting torque thereof becomes low.
- a large torque is not required at the beginning of the closing of the blades.
- a large torque is required as the blades are closed.
- the link-type electric scissors are configured so that a large torque can be generated using a motor having a large output, for example. With this configuration, the large torque is applied at the beginning of the closing of the blades.
- the gear-type electric scissors In the gear-type electric scissors, a constant torque is obtained regardless of the opening degree of the blades.
- the gears thereof are required to be increased in thickness to withstand the large load. It is thus difficult to make the electric scissors light in weight, and the apparatus eventually becomes large in size.
- the gears are decreased in thickness to make the apparatus compact in size and light in weight, the durability thereof is degraded.
- One or more embodiments of the invention provide electric scissors capable of obtaining a torque required for cutting an object to be cut without increasing a weight thereof.
- electric scissors 1 A, 1 B are provided with: a first blade ( 2 A, 2 B) including a cutting edge portion ( 20 A, 20 B) and a transmission portion ( 21 A, 21 B), and rotatably supported by a shaft ( 4 A, 4 B) serving as a fulcrum; a second blade ( 3 A, 3 B) including a cutting edge portion ( 30 A, 30 B) and a transmission portion ( 31 A, 31 B), wherein an object between the first blade ( 2 A, 2 B) and the second blade ( 3 A, 3 B) is cut by closing the first blade ( 2 A, 2 B) and the second blade ( 3 A, 3 B); a toggle link mechanism ( 7 A, 7 B) including a first link ( 71 A, 71 B), a second link ( 72 A, 72 B), and a drive shaft ( 70 A, 70 B); and a drive section ( 5 , 6 ).
- first link ( 71 A, 71 B) is rotatably connected to said transmission portion ( 21 A, 21 B) of the first blade ( 2 A, 2 B).
- One end of the second link ( 72 A, 72 B) is rotatably connected to said transmission portion ( 31 A, 31 B) of the second blade ( 3 A, 3 B).
- the other end of the first link ( 71 A, 71 B) is rotatably connected to the other end of the second link ( 72 A, 72 B) through the drive shaft ( 70 A, 70 B).
- the drive section ( 5 , 6 ) is configured: to close the first blade ( 2 A, 2 B) and the second blade ( 3 A, 3 B) by displacing said drive shaft ( 70 A, 70 B) in a direction of increasing an angle between the first link ( 71 A, 71 B) and the second link ( 72 A, 72 B); and to open the first blade ( 2 A, 2 B) and the second blade ( 3 A, 3 B) by displacing said drive shaft ( 70 A, 70 B) in a direction of decreasing said angle between the first link ( 71 A, 71 B) and the second link ( 72 A, 72 B).
- the electric scissors having the above structure, when the drive shaft is displaced in the direction of increasing the angle formed by the first link and the second link of the toggle link mechanism, the connection of the first link and the second link being bent at the drive shaft serving as a fulcrum, the first blade and the second blade are closed while being rotated around the shaft serving as a fulcrum.
- a generated cutting force increases.
- a large cutting torque can be generated in the latter half of the closing operation of the first blade and the second blade.
- the electric scissors having the above structure, since a large cutting torque can be generated in the latter half of the closing operation of the blades requiring a large torque to cut an object to be cut, such as a branch, the torque required to cut the object to be cut can be obtained without increasing the weight of the mechanisms of the electric scissors.
- the drive system of the electric scissors can be made compact in size and light in weight without degrading durability. Since the drive system can be made compact in size and light in weight, the entire apparatus can also be made compact in size and light in weight. Consequently, the operability of the tool that is held in the hand and used can be improved.
- the second blade ( 3 A) may be rotatably supported by said shaft ( 4 A) serving as a fulcrum.
- Said angle between the first link ( 71 A, 71 B) and the second link ( 72 A, 72 B) may become close to 180°, when the first blade ( 2 A, 2 B) and the second blade ( 3 A, 3 B) are closed to a maximum extent.
- the drive section may include a motor ( 5 ) to be rotatably driven, and a ball screw mechanism ( 6 ) configured to convert a rotation of the motor ( 5 ) into a linear motion and to transmit the linear motion to said drive shaft ( 70 A, 70 B) of said toggle link mechanism ( 7 A, 7 B).
- FIG. 1 is a side sectional view showing a configuration example of electric scissors according to a first exemplary embodiment.
- FIG. 2 is a side sectional view showing a configuration example of the electric scissors according to the first exemplary embodiment.
- FIG. 3 is a graph showing a relationship between a generated torque and a torque required for cutting.
- FIG. 4 is a side sectional view showing a configuration example of electric scissors according to a second exemplary embodiment.
- FIG. 5 is a side sectional view showing a configuration example of the electric scissors according to the second exemplary embodiment.
- FIGS. 1 and 2 are side sectional views showing a configuration example of electric scissors according to a first exemplary embodiment.
- FIG. 1 shows a state in which the blades thereof are opened
- FIG. 2 shows a state in which the blades are closed.
- a first movable blade 2 A and a second movable blade 3 A are rotatably supported by a shaft 4 A serving as a fulcrum.
- the rotation of a motor 5 is converted into a linear motion using a ball screw mechanism 6 , and the drive power of the motor 5 , the rotation of which is converted into a linear motion, is transmitted to the first movable blade 2 A and the second movable blade 3 A using a toggle link mechanism 7 A.
- the first movable blade 2 A and the second movable blade 3 A are rotated around the shaft 4 A serving as a fulcrum, thereby being opened/closed.
- the shaft 4 A is supported on a frame 8 A, and the movements of the ball screw mechanism 6 and the toggle link mechanism 7 A are guided along the frame 8 A. Furthermore, in the electric scissors 1 A, the above-mentioned respective components are installed in a housing 9 , and the user can perform operation while holding the housing 9 .
- the first movable blade 2 A an example of a first blade, is equipped with a cutting edge portion 20 A disposed on one side of the first movable blade 2 A with respect to a position in which the first movable blade 2 A is supported by the shaft 4 A and is also equipped with a blade arm 21 A disposed on the other side of the first movable blade 2 A with respect to the position and serving as a transmission portion, the angle formed by the cutting edge portion 20 A and the blade arm 21 A being a predetermined obtuse angle.
- the cutting edge portion 20 A and the blade arm 21 A of the first movable blade 2 A may be integrated into one component. However, it is preferable that the cutting edge portion 20 A and the blade arm 21 A should be independent components so that the cutting edge portion 20 A can be replaced easily.
- the second movable blade 3 A is equipped with a cutting edge portion 30 A disposed on one side of the second movable blade 3 A with respect to a position in which the second movable blade 3 A is supported by the shaft 4 A and is also equipped with a blade arm 31 A disposed on the other side of the second movable blade 3 A with respect to the position and serving as a transmission portion, the angle formed by the cutting edge portion 30 A and the blade arm 31 A being a predetermined obtuse angle.
- the cutting edge portion 30 A and the blade arm 31 A of the second movable blade 3 A may be integrated into one component. However, it is preferable that the cutting edge portion 30 A and the blade arm 31 A should be independent components so that the cutting edge portion 30 A can be replaced easily.
- the shaft 4 A is installed in the frame 8 A using a mounting fixture 40 A while the cutting edge portion 20 A of the first movable blade 2 A and the cutting edge portion 30 A of the second movable blade 3 A are exposed from the housing 9 .
- the first movable blade 2 A and the second movable blade 3 A are configured so that the cutting edge portions 20 A and 30 A can be replaced by attaching and detaching the mounting fixture 40 A to and from the shaft 4 A.
- the motor 5 and the ball screw mechanism 6 constitute an example of a drive section, and the drive shaft of the motor 5 is connected to a speed reducer 50 having planet gears, for example.
- the ball screw mechanism 6 is equipped with a screw shaft 60 connected to the output shaft of the speed reducer 50 and a nut portion 61 in which balls, not shown, inserted in the screw groove of the screw shaft 60 are built in.
- a guide shaft 62 provided in the nut portion 61 is inserted into a guide groove 80 that is provided in the frame 8 A in a direction in parallel with the screw shaft 60 .
- the rotation of the motor 5 is converted into the linear motion of the nut portion 61 .
- the movement direction of the nut portion 61 is switched depending on the rotation direction of the motor 5 .
- the toggle link mechanism 7 A is equipped with a first link 71 A and a second link 72 A rotatably connected to each other via a drive shaft 70 A.
- one end portion of the first link 71 A is rotatably connected to the blade arm 21 A of the first movable blade 2 A via a shaft 73 A serving as a fulcrum.
- one end portion of the second link, 72 A is rotatably connected to the blade arm 31 A of the second movable blade 3 A via a shaft 74 A serving as a fulcrum.
- the other end portion of the first link 71 A is rotatably connected to the other end portion of the second link 72 A via the drive shaft 70 A serving as a fulcrum.
- connection portion of the blade arm 21 A of the first movable blade 2 A and the first link 71 A at the shaft 73 A is bent, and the connection portion of the blade arm 31 A of the second movable blade 3 A and the second link 72 A at the shaft 74 A is bent. Furthermore, the connection portion of the first link 71 A and the second link 72 A at the drive shaft 70 A is bent.
- the drive shaft 70 A of the toggle link mechanism 7 A is guided along the guide groove 80 of the frame 8 A and supported so as to be movable in a direction in parallel with the screw shaft 60 .
- the drive shaft 70 A of the toggle link mechanism 7 A is connected to the nut portion 61 via a transmission member 75 and is moved linearly in conjunction with the movement of the nut portion 61 obtained by the conversion of the rotation of the motor 5 into a linear motion using the ball screw mechanism 6 .
- the first movable blade 2 A and the second movable blade 3 A are rotated around the shaft 4 A serving as a fulcrum, thereby being opened/closed.
- the blades are closed when the blade arm 21 A of the first movable blade 2 A and the blade arm 31 A of the second movable blade 3 A are rotated in directions in which the angle formed by the blade arm 21 A and the blade arm 31 A increases.
- the connection portion of the first link 71 A and the second link 72 A at the drive shaft 70 A is bent.
- the first link 71 A and the second link 72 A are rotated while the drive shaft 70 A being moved linearly serves as a fulcrum in a direction of increasing the angle formed by the first link 71 A and the second link 72 A.
- the dimensions and angles of respective components are determined so that when the first movable blade 2 A and the second movable blade 3 A are closed, the angle formed by the first link 71 A and the second link 72 A becomes close to 180°.
- the toggle link mechanism 7 A is configured so that the angle formed by the first link 71 A and the second link 72 A does not become larger than 180°.
- the electric scissors 1 A are equipped with an operation section 10 for opening/closing the first movable blade 2 A and the second movable blade 3 A.
- the operation section 10 is equipped with an auxiliary trigger 12 that operates in conjunction with a first switch 11 for turning on/off the electric power supplied to the motor 5 and a main trigger 14 that operates in conjunction with a second switch 13 for controlling the rotation direction, the amount of rotation and the rotation speed of the motor 5 .
- the auxiliary trigger 12 is installed in the housing 9 so as to be rotatable around a shaft 12 a serving as a fulcrum and is equipped with a restricting protrusion 12 b for restricting the operation of the main trigger 14 .
- the main trigger 14 is installed on the shaft 13 a of the second switch 13 .
- the second switch 13 outputs control signals corresponding to the rotation direction, the amount of rotation and the rotation speed, whereby the motor 5 is controlled in accordance with the motion of the main trigger 14 .
- auxiliary trigger 12 When the auxiliary trigger 12 is operated so as to be displaced to a position where the first switch 11 is turned on, the power is turned on, and the restricting protrusion 12 b is released from the main trigger 14 . As a result, the operation of the main trigger 14 is made possible. Then, when the main trigger 14 is operated while the auxiliary trigger 12 has been operated, control signals corresponding to the rotation direction, the amount of rotation and the rotation speed of the main trigger 14 are output from the second switch 13 , whereby the motor 5 is controlled in accordance with the motion of the main trigger 14 .
- the user holds the housing 9 and operates the auxiliary trigger 12 , thereby displacing the auxiliary trigger 12 to the position where the first switch 11 is turned on.
- the power of the electric scissors 1 A is turned on, the restricting protrusion 12 b is released from the main trigger 14 , and the operation of the main trigger 14 is made possible.
- the user operates the main trigger 14 while the auxiliary trigger 12 has been operated.
- the control signals corresponding to the rotation direction, the amount of rotation and the rotation speed of the main trigger 14 are output from the second switch 13 , whereby the motor 5 is controlled in accordance with the motion of the main trigger 14 .
- the motor 5 When the main trigger 14 of the electric scissors 1 A is displaced in a direction of being pulled, the motor 5 is controlled so as to be rotated in a direction of closing the first movable blade 2 A and the second movable blade 3 A. When the main trigger 14 is displaced in a direction of being released, the motor 5 is controlled so as to be rotated in a direction of opening the first movable blade 2 A and the second movable blade 3 A.
- the displacement of the drive shaft 70 A of the toggle link mechanism 7 A due to the linear movement thereof is transmitted to the first movable blade 2 A via the first link 71 A and also transmitted to the second movable blade 3 A via the second link 72 A.
- the first movable blade 2 A having the blade arm 21 A connected to the first link 71 A and the second movable blade 3 A having the blade arm 31 A connected to the second link 72 A are rotated around the shaft 4 A serving as a fulcrum in a direction of increasing the angle formed by the blade arm 21 A and the blade arm 31 A.
- the first movable blade 2 A and the second movable blade 3 A are closed.
- the angle formed by the first link 71 A and the second link 72 A becomes close to 180°.
- the angle formed by the first link 71 A and the second link 72 A of the toggle link mechanism 7 A becomes close to 180°, whereby the first link 71 A and the second link 72 A approach a state of being aligned along a straight line.
- the cutting force generated using the cutting edge portion 20 A of the first movable blade 2 A and the cutting edge portion 30 A of the second movable blade 3 A is increased in the state shown in FIG. 2 in which the first movable blade 2 A and the second movable blade 3 A are closed in comparison with the state shown in FIG. 1 in which the first movable blade 2 A and the second movable blade 3 A begin to be closed.
- the first movable blade 2 A having the blade arm 21 A connected to the first link 71 A and the second movable blade 3 A having the blade arm 31 A connected to the second link 72 A are rotated around the shaft 4 A serving as a fulcrum in a direction of decreasing the angle formed by the blade arm 21 A and the blade arm 31 A.
- the first movable blade 2 A and the second movable blade 3 A are opened.
- FIG. 3 is a graph showing the relationship between a generated torque and a torque required for cutting.
- the relationship between a torque required for cutting a branch having a certain diameter and supposed to be cut using the electric scissors 1 A and the angle formed by the first movable blade 2 A and the second movable blade 3 A is indicated using a solid line.
- the relationship between the angle formed by the first movable blade 2 A and the second movable blade 3 A and the generated torque is indicated using a broken line.
- blade angle A(°) indicates a state in which the first movable blade 2 A and the second movable blade 3 A are closed as shown in FIG. 2
- blade angle 1 / 2 A(°) indicates a state in which the first movable blade 2 A and the second movable blade 3 A are half opened.
- the electric scissors 1 A according to the first exemplary embodiment equipped with the toggle link mechanism 7 A can generate a necessary and sufficient torque in the latter half closing operation of the first movable blade 2 A and the second movable blade 3 A requiring a large torque in the case of cutting a branch.
- the outputs of the motor 5 and the ball screw mechanism 6 can be reduced, and the durability of the ball screw mechanism 6 , etc. can be improved.
- the ball screw mechanism 6 , etc. can be made compact by reducing the outputs of the motor 5 and the ball screw mechanism 6 .
- the housing 9 being held in the hand of the user can be designed narrow, and the operability of the apparatus can be improved.
- the outputs of the motor 5 and the ball screw mechanism 6 can be reduced, the voltage of the battery for driving the motor 5 can be lowered. Consequently, the battery can be made compact in size and light in weight by reducing the number of cells in the battery, for example.
- both the first movable blade 2 A and the second movable blade 3 A are movable.
- the rotation angle of the blades when the blades are closed should only be half the rotation angle obtained in a configuration in which one of the blades is a movable blade and the other is a fixed blade, provided that the opening angle of the blades is the same.
- the stroke of the ball screw mechanism 6 in the double blade drive type can be made approximately half the stroke in the single blade drive type.
- the apparatus can be made compact in length.
- FIGS. 4 and 5 are side sectional views showing a configuration example of electric scissors according to a second exemplary embodiment; FIG. 4 shows a state in which the blades thereof are opened, and FIG. 5 shows a state in which the blades are closed.
- FIGS. 4 and 5 mechanisms for driving one of the blades of the electric scissors are shown, and the housing, the operation section, etc. thereof are not shown.
- Electric scissors 1 B have a movable blade 2 B and a fixed blade 3 B, and the movable blade 2 B is rotatably supported by a shaft 4 B serving as a fulcrum.
- the rotation of a motor 5 is converted into a linear motion using a ball screw mechanism 6 , and the drive power of the motor 5 , the rotation of which is converted into a linear motion, is transmitted to the movable blade 2 B using a toggle link mechanism 7 B.
- the movable blade 2 B is rotated around the shaft 4 B serving as a fulcrum, thereby being opened/closed.
- the movable blade 2 B an example of a first blade, is equipped with a cutting edge portion 20 B disposed on one side of the movable blade 2 B with respect to a position in which the movable blade 2 B is supported by the shaft 4 B and is also equipped with a blade arm 21 A disposed on the other side of the movable blade 2 B with respect to the position and serving as a transmission portion, the angle formed by the cutting edge portion 20 B and the blade arm 21 B being a predetermined obtuse angle.
- the cutting edge portion 20 B and the blade arm 21 B of the movable blade 2 B may be integrated into one component or may be independent components.
- the fixed blade 3 B an example of a second blade, is equipped with a cutting edge portion 30 B and a blade arm 31 B serving as a transmission portion.
- the cutting edge portion 30 B and the blade arm 31 B of the fixed blade 3 B may be integrated into one component or may be independent components.
- the drive shaft of the motor 5 is connected to a speed reducer 50 having planet gears, for example.
- the ball screw mechanism 6 is equipped with a screw shaft 60 connected to the output shaft of the speed reducer 50 and a nut portion 61 in which balls, not shown, inserted in the screw groove of the screw shaft 60 are built in. When the screw shaft 60 is driven and rotated, the nut portion 61 is moved linearly along the screw shaft 60 .
- the rotation of the motor 5 is converted into the linear motion of the nut portion 61 .
- the movement direction of the nut portion 61 is switched depending on the rotation direction of the motor 5 .
- the toggle link mechanism 7 B is equipped with a first link 71 B and a second link 72 B rotatably connected to each other via a drive shaft 70 B.
- one end portion of the first link 71 B is rotatably connected to the blade arm 21 B of the movable blade 2 B via a shaft 73 B serving as a fulcrum.
- one end portion of the second link 72 B is rotatably connected to the blade arm 31 B of the fixed blade 3 B via a shaft 74 B serving as a fulcrum.
- the other end portion of the first link 71 B is rotatably connected to the other end portion of the second link 72 B via the drive shaft 70 B serving as a fulcrum.
- the drive shaft 70 B of the toggle link mechanism 7 B is connected to the nut portion 61 via a transmission member 75 and is moved linearly in conjunction with the movement of the nut portion 61 obtained by the conversion of the rotation of the motor 5 into a linear motion using the ball screw mechanism 6 .
- the movable blade 2 B is rotated around the shaft 4 B serving as a fulcrum, thereby being opened/closed with respect to the fixed blade 3 B.
- the blade is closed when the blade is rotated in a direction in which the angle formed by the blade arm 21 B of the movable blade 2 B and the blade arm 31 B of the fixed blade 3 B increases.
- the connection portion of the first link 71 B and the second link 72 B at the drive shaft 70 B is bent.
- the first link 71 B and the second link 72 B are rotated while the drive shaft 70 B being moved linearly serves as a fulcrum in a direction of increasing the angle formed by the first link 71 B and the second link 72 B.
- the dimensions and angles of respective components are determined so that when the movable blade 2 B is closed, the angle formed by the first link 71 B and the second link 72 B becomes close to 180°.
- the movable blade 2 B having the blade arm 21 B connected to the first link 71 B is rotated around the shaft 4 B serving as a fulcrum in a direction of increasing the angle formed by the blade arm 21 B and the blade arm 31 B.
- the movable blade 2 B is closed with respect to the fixed blade 3 B.
- the angle formed by the first link 71 B and the second link 72 B becomes close to 180°.
- the angle formed by the first link 71 B and the second link 72 B of the toggle link mechanism 7 B becomes close to 180°, whereby the first link 71 B and the second link 72 B approach a state of being aligned along a straight line.
- the movable blade 2 B having the blade arm 21 B connected to the first link 71 B is rotated around the shaft 4 B serving as a fulcrum in a direction of decreasing the angle formed by the blade arm 21 B and the blade arm 31 B.
- the movable blade 2 B is opened with respect to the fixed blade 3 B.
- the motor 5 and the ball screw mechanism 6 are used as the drive section for displacing the drive shaft 70 A, 70 B in a linear direction perpendicular to an axial direction of the drive shaft 70 A, 70 B.
- any well known structures other than the ball screw mechanism 6 can be used as a structure for converting the rotational motion of the motor 5 to the linear motion.
- an electromagnetic solenoid actuator, a linear motor, or the like can be used as the drive section, instead of the combination of the motor 5 and the ball screw mechanism 6 .
Abstract
Electric scissors (1A, 1B) is provided with: a first blade (2A, 2B); a second blade (3A, 3B); a toggle link mechanism (7A, 7B) including a first link (71A, 71B), a second link (72A, 72B), and a drive shaft (70A, 70B); and a drive section (5, 6). One end of the first link (71A, 71B) is rotatably connected to a transmission portion (21A, 21B) of the first blade (2A, 2B). One end of the second link (72A, 72B) is rotatably connected to a transmission portion (31A, 31B) of the second blade (3A, 3B). The other end of the first link (71A, 71B) is rotatably connected to the other end of the second link (72A, 72B) through the drive shaft (70A, 70B). The drive section (5, 6) is configured to open/close the first blade (2A, 2B) and the second blade (3A, 3B) by displacing the drive shaft (70A, 70B) in a direction perpendicular to an axial direction of the drive shaft (70A, 70B).
Description
- 1. Field of the Invention
- The present invention relates to electric scissors, used to prune branches of trees or the like, for cutting objects to be cut, such as the branches, by opening and closing the blades using a drive power of a motor.
- 2. Background Art
- Conventionally, branches or the like have been pruned with scissors by opening/closing blades of scissors with a hand of the user. However, for the purpose of saving labor of this work, electric scissors are proposed that can cut objects to be cut, such as the branches, by opening/closing the blades using a drive power of a motor.
- Such electric scissors include a fixed blade and a movable blade being rotatable around a shaft serving as a fulcrum. A configuration referred to as a link type and a configuration referred to as a gear type are known as the configurations of systems for driving the movable blade.
- Link-type electric scissors are configured so that the movable blade thereof is formed into an L-shape, for example, having a cutting edge portion on one side of the movable blade with respect to the shaft on which the movable blade is supported and having an arm portion on the other side of the movable blade. Furthermore, the electric scissors have a ball screw for converting a rotation of a motor into a linear motion of a nut portion and a link for connecting the nut portion to the arm portion of the movable blade. With this configuration, the linear movement of the nut portion is transmitted to the arm portion of the movable blade via the link, and the movable blade is rotated around the shaft serving as a fulcrum (for example, refer to Patent Document 1).
- Patent Document 1: U.S. Pat. No. 5,002,135
- Gear-type electric scissors are configured so that the movable blade thereof has an arc-shaped gear disposed coaxially with a shaft on which the movable blade is supported and so that the rotation of a motor is transmitted to the movable blade using a mechanism in which a bevel gear and a spur gear or the like are combined (for example, refer to Patent Document 2).
- Patent Document 2: JP-A-11-128561
- The link-type electric scissors are characterized in that as the blades are closed, the cutting torque thereof becomes low. Generally speaking, in the case of cutting an object to be cut with scissors, a large torque is not required at the beginning of the closing of the blades. However, a large torque is required as the blades are closed.
- For this reason, for the purpose of obtaining a desired torque when the blades are closed, the link-type electric scissors are configured so that a large torque can be generated using a motor having a large output, for example. With this configuration, the large torque is applied at the beginning of the closing of the blades.
- Hence, a load applied to the drive system, such as the ball screw mechanism, becomes large, and the durability of the drive system is degraded. On the other hand, for the purpose of improving the durability, the drive system is required to be constructed sturdily so as to cope with the large load. Consequently, although the electric scissors are used as a tool held in the hand, it is difficult to make the electric scissors light in weight, and the apparatus eventually becomes large in size and the operability thereof is degraded.
- In the gear-type electric scissors, a constant torque is obtained regardless of the opening degree of the blades. However, the gears thereof are required to be increased in thickness to withstand the large load. It is thus difficult to make the electric scissors light in weight, and the apparatus eventually becomes large in size. On the other hand, if the gears are decreased in thickness to make the apparatus compact in size and light in weight, the durability thereof is degraded.
- One or more embodiments of the invention provide electric scissors capable of obtaining a torque required for cutting an object to be cut without increasing a weight thereof.
- In accordance with one or more embodiments of the invention, electric scissors (1A, 1B) are provided with: a first blade (2A, 2B) including a cutting edge portion (20A, 20B) and a transmission portion (21A, 21B), and rotatably supported by a shaft (4A, 4B) serving as a fulcrum; a second blade (3A, 3B) including a cutting edge portion (30A, 30B) and a transmission portion (31A, 31B), wherein an object between the first blade (2A, 2B) and the second blade (3A, 3B) is cut by closing the first blade (2A, 2B) and the second blade (3A, 3B); a toggle link mechanism (7A, 7B) including a first link (71A, 71B), a second link (72A, 72B), and a drive shaft (70A, 70B); and a drive section (5, 6). One end of the first link (71A, 71B) is rotatably connected to said transmission portion (21A, 21B) of the first blade (2A, 2B). One end of the second link (72A, 72B) is rotatably connected to said transmission portion (31A, 31B) of the second blade (3A, 3B). The other end of the first link (71A, 71B) is rotatably connected to the other end of the second link (72A, 72B) through the drive shaft (70A, 70B). The drive section (5, 6) is configured: to close the first blade (2A, 2B) and the second blade (3A, 3B) by displacing said drive shaft (70A, 70B) in a direction of increasing an angle between the first link (71A, 71B) and the second link (72A, 72B); and to open the first blade (2A, 2B) and the second blade (3A, 3B) by displacing said drive shaft (70A, 70B) in a direction of decreasing said angle between the first link (71A, 71B) and the second link (72A, 72B).
- According to the electric scissors having the above structure, when the drive shaft is displaced in the direction of increasing the angle formed by the first link and the second link of the toggle link mechanism, the connection of the first link and the second link being bent at the drive shaft serving as a fulcrum, the first blade and the second blade are closed while being rotated around the shaft serving as a fulcrum. As the angle formed by the first link and the second link of the toggle link mechanism is increased and the first blade and the second blade are closed, a generated cutting force increases. As a result, a large cutting torque can be generated in the latter half of the closing operation of the first blade and the second blade.
- According to the electric scissors having the above structure, since a large cutting torque can be generated in the latter half of the closing operation of the blades requiring a large torque to cut an object to be cut, such as a branch, the torque required to cut the object to be cut can be obtained without increasing the weight of the mechanisms of the electric scissors.
- Hence, a load applied to the drive system of the electric scissors can be reduced, and the drive system can be made compact in size and light in weight without degrading durability. Since the drive system can be made compact in size and light in weight, the entire apparatus can also be made compact in size and light in weight. Consequently, the operability of the tool that is held in the hand and used can be improved.
- Further, the second blade (3A) may be rotatably supported by said shaft (4A) serving as a fulcrum.
- Said angle between the first link (71A, 71B) and the second link (72A, 72B) may become close to 180°, when the first blade (2A, 2B) and the second blade (3A, 3B) are closed to a maximum extent.
- Moreover, the drive section may include a motor (5) to be rotatably driven, and a ball screw mechanism (6) configured to convert a rotation of the motor (5) into a linear motion and to transmit the linear motion to said drive shaft (70A, 70B) of said toggle link mechanism (7A, 7B).
- Other aspects and advantages of the invention will be apparent from the following description, the drawings and the claims.
-
FIG. 1 is a side sectional view showing a configuration example of electric scissors according to a first exemplary embodiment. -
FIG. 2 is a side sectional view showing a configuration example of the electric scissors according to the first exemplary embodiment. -
FIG. 3 is a graph showing a relationship between a generated torque and a torque required for cutting. -
FIG. 4 is a side sectional view showing a configuration example of electric scissors according to a second exemplary embodiment. -
FIG. 5 is a side sectional view showing a configuration example of the electric scissors according to the second exemplary embodiment. - Exemplary embodiments of electric scissors of the present invention will be described below referring to the accompanying drawings.
-
FIGS. 1 and 2 are side sectional views showing a configuration example of electric scissors according to a first exemplary embodiment.FIG. 1 shows a state in which the blades thereof are opened, andFIG. 2 shows a state in which the blades are closed. - In
electric scissors 1A according to the first exemplary embodiment, a firstmovable blade 2A and a secondmovable blade 3A are rotatably supported by ashaft 4A serving as a fulcrum. - In the
electric scissors 1A, the rotation of amotor 5 is converted into a linear motion using aball screw mechanism 6, and the drive power of themotor 5, the rotation of which is converted into a linear motion, is transmitted to the firstmovable blade 2A and the secondmovable blade 3A using atoggle link mechanism 7A. As a result, the firstmovable blade 2A and the secondmovable blade 3A are rotated around theshaft 4A serving as a fulcrum, thereby being opened/closed. - In the
electric scissors 1A, theshaft 4A is supported on aframe 8A, and the movements of theball screw mechanism 6 and thetoggle link mechanism 7A are guided along theframe 8A. Furthermore, in theelectric scissors 1A, the above-mentioned respective components are installed in a housing 9, and the user can perform operation while holding the housing 9. - The respective components will be described below in detail. The first
movable blade 2A, an example of a first blade, is equipped with acutting edge portion 20A disposed on one side of the firstmovable blade 2A with respect to a position in which the firstmovable blade 2A is supported by theshaft 4A and is also equipped with ablade arm 21A disposed on the other side of the firstmovable blade 2A with respect to the position and serving as a transmission portion, the angle formed by thecutting edge portion 20A and theblade arm 21A being a predetermined obtuse angle. Thecutting edge portion 20A and theblade arm 21A of the firstmovable blade 2A may be integrated into one component. However, it is preferable that thecutting edge portion 20A and theblade arm 21A should be independent components so that thecutting edge portion 20A can be replaced easily. - The second
movable blade 3A, an example of a second blade, is equipped with acutting edge portion 30A disposed on one side of the secondmovable blade 3A with respect to a position in which the secondmovable blade 3A is supported by theshaft 4A and is also equipped with ablade arm 31A disposed on the other side of the secondmovable blade 3A with respect to the position and serving as a transmission portion, the angle formed by thecutting edge portion 30A and theblade arm 31A being a predetermined obtuse angle. As in the case of the firstmovable blade 2A, thecutting edge portion 30A and theblade arm 31A of the secondmovable blade 3A may be integrated into one component. However, it is preferable that thecutting edge portion 30A and theblade arm 31A should be independent components so that thecutting edge portion 30A can be replaced easily. - The
shaft 4A is installed in theframe 8A using a mountingfixture 40A while thecutting edge portion 20A of the firstmovable blade 2A and thecutting edge portion 30A of the secondmovable blade 3A are exposed from the housing 9. The firstmovable blade 2A and the secondmovable blade 3A are configured so that thecutting edge portions fixture 40A to and from theshaft 4A. - The
motor 5 and theball screw mechanism 6 constitute an example of a drive section, and the drive shaft of themotor 5 is connected to aspeed reducer 50 having planet gears, for example. Theball screw mechanism 6 is equipped with ascrew shaft 60 connected to the output shaft of thespeed reducer 50 and anut portion 61 in which balls, not shown, inserted in the screw groove of thescrew shaft 60 are built in. - In the
ball screw mechanism 6, aguide shaft 62 provided in thenut portion 61 is inserted into aguide groove 80 that is provided in theframe 8A in a direction in parallel with thescrew shaft 60. When thescrew shaft 60 of theball screw mechanism 6 is driven and rotated, the rotation of thenut portion 61 around thescrew shaft 60 serving as a fulcrum is restricted since theguide shaft 62 is guided along theguide groove 80, whereby thenut portion 61 is moved linearly along thescrew shaft 60. - Hence, in the
ball screw mechanism 6, the rotation of themotor 5 is converted into the linear motion of thenut portion 61. As a result, the movement direction of thenut portion 61 is switched depending on the rotation direction of themotor 5. - The
toggle link mechanism 7A is equipped with afirst link 71A and asecond link 72A rotatably connected to each other via adrive shaft 70A. In thetoggle link mechanism 7A, one end portion of thefirst link 71A is rotatably connected to theblade arm 21A of the firstmovable blade 2A via ashaft 73A serving as a fulcrum. In addition, one end portion of the second link, 72A is rotatably connected to theblade arm 31A of the secondmovable blade 3A via ashaft 74A serving as a fulcrum. Furthermore, the other end portion of thefirst link 71A is rotatably connected to the other end portion of thesecond link 72A via thedrive shaft 70A serving as a fulcrum. - In the
toggle link mechanism 7A, the connection portion of theblade arm 21A of the firstmovable blade 2A and thefirst link 71A at theshaft 73A is bent, and the connection portion of theblade arm 31A of the secondmovable blade 3A and thesecond link 72A at theshaft 74A is bent. Furthermore, the connection portion of thefirst link 71A and thesecond link 72A at thedrive shaft 70A is bent. - The
drive shaft 70A of thetoggle link mechanism 7A is guided along theguide groove 80 of theframe 8A and supported so as to be movable in a direction in parallel with thescrew shaft 60. Thedrive shaft 70A of thetoggle link mechanism 7A is connected to thenut portion 61 via atransmission member 75 and is moved linearly in conjunction with the movement of thenut portion 61 obtained by the conversion of the rotation of themotor 5 into a linear motion using theball screw mechanism 6. - The first
movable blade 2A and the secondmovable blade 3A are rotated around theshaft 4A serving as a fulcrum, thereby being opened/closed. The blades are closed when theblade arm 21A of the firstmovable blade 2A and theblade arm 31A of the secondmovable blade 3A are rotated in directions in which the angle formed by theblade arm 21A and theblade arm 31A increases. - In the
toggle link mechanism 7A, the connection portion of thefirst link 71A and thesecond link 72A at thedrive shaft 70A is bent. In conjunction with the closing operation of the firstmovable blade 2A and the secondmovable blade 3A, thefirst link 71A and thesecond link 72A are rotated while thedrive shaft 70A being moved linearly serves as a fulcrum in a direction of increasing the angle formed by thefirst link 71A and thesecond link 72A. Furthermore, the dimensions and angles of respective components are determined so that when the firstmovable blade 2A and the secondmovable blade 3A are closed, the angle formed by thefirst link 71A and thesecond link 72A becomes close to 180°. When the angle formed by thefirst link 71A and thesecond link 72A becomes larger than 180°, the firstmovable blade 2A and the secondmovable blade 3A are rotated in directions so that they are opened. Hence, thetoggle link mechanism 7A is configured so that the angle formed by thefirst link 71A and thesecond link 72A does not become larger than 180°. - The
electric scissors 1A are equipped with anoperation section 10 for opening/closing the firstmovable blade 2A and the secondmovable blade 3A. Theoperation section 10 is equipped with anauxiliary trigger 12 that operates in conjunction with afirst switch 11 for turning on/off the electric power supplied to themotor 5 and amain trigger 14 that operates in conjunction with asecond switch 13 for controlling the rotation direction, the amount of rotation and the rotation speed of themotor 5. - The
auxiliary trigger 12 is installed in the housing 9 so as to be rotatable around ashaft 12 a serving as a fulcrum and is equipped with a restrictingprotrusion 12 b for restricting the operation of themain trigger 14. Themain trigger 14 is installed on theshaft 13 a of thesecond switch 13. When themain trigger 14 is operated and theshaft 13 a is rotated, thesecond switch 13 outputs control signals corresponding to the rotation direction, the amount of rotation and the rotation speed, whereby themotor 5 is controlled in accordance with the motion of themain trigger 14. - In the
electric scissors 1A, when theauxiliary trigger 12 is not operated and thefirst switch 11 is in the ON state, the restrictingprotrusion 12 b is locked with themain trigger 14, and the operation of themain trigger 14 is restricted. - When the
auxiliary trigger 12 is operated so as to be displaced to a position where thefirst switch 11 is turned on, the power is turned on, and the restrictingprotrusion 12 b is released from themain trigger 14. As a result, the operation of themain trigger 14 is made possible. Then, when themain trigger 14 is operated while theauxiliary trigger 12 has been operated, control signals corresponding to the rotation direction, the amount of rotation and the rotation speed of themain trigger 14 are output from thesecond switch 13, whereby themotor 5 is controlled in accordance with the motion of themain trigger 14. - Next, the operation of the
electric scissors 1A according to the first exemplary embodiment will be described referring to the respective drawings. The user holds the housing 9 and operates theauxiliary trigger 12, thereby displacing theauxiliary trigger 12 to the position where thefirst switch 11 is turned on. As a result, the power of theelectric scissors 1A is turned on, the restrictingprotrusion 12 b is released from themain trigger 14, and the operation of themain trigger 14 is made possible. - The user operates the
main trigger 14 while theauxiliary trigger 12 has been operated. In theelectric scissors 1A, the control signals corresponding to the rotation direction, the amount of rotation and the rotation speed of themain trigger 14 are output from thesecond switch 13, whereby themotor 5 is controlled in accordance with the motion of themain trigger 14. - When the
main trigger 14 of theelectric scissors 1A is displaced in a direction of being pulled, themotor 5 is controlled so as to be rotated in a direction of closing the firstmovable blade 2A and the secondmovable blade 3A. When themain trigger 14 is displaced in a direction of being released, themotor 5 is controlled so as to be rotated in a direction of opening the firstmovable blade 2A and the secondmovable blade 3A. - When the
motor 5 is driven and rotated in the direction of closing the firstmovable blade 2A and the secondmovable blade 3A, thenut portion 61 is moved linearly in the direction indicated by arrow F1 in accordance with the rotation direction of thescrew shaft 60. - When the
motor 5 is driven and rotated in a predetermined direction and thenut portion 61 is moved linearly in the direction indicated by arrow F1, thedrive shaft 70A of thetoggle link mechanism 7A connected to thenut portion 61 via thetransmission member 75 is moved linearly in the direction indicated by arrow F1, that is, a direction of approaching theshaft 4A of the firstmovable blade 2A and the secondmovable blade 3A. - The displacement of the
drive shaft 70A of thetoggle link mechanism 7A due to the linear movement thereof is transmitted to the firstmovable blade 2A via thefirst link 71A and also transmitted to the secondmovable blade 3A via thesecond link 72A. - As shown in
FIG. 1 , when thedrive shaft 70A of thetoggle link mechanism 7A is moved linearly in the direction indicated by arrow F1 from a state in which the firstmovable blade 2A and the secondmovable blade 3A are opened, thefirst link 71A and thesecond link 72A, the connection portion therebetween being bent at thedrive shaft 70A, are rotated in the direction of increasing the angle formed by thefirst link 71A and thesecond link 72A while thedrive shaft 70A being moved linearly serves as a fulcrum. - The first
movable blade 2A having theblade arm 21A connected to thefirst link 71A and the secondmovable blade 3A having theblade arm 31A connected to thesecond link 72A are rotated around theshaft 4A serving as a fulcrum in a direction of increasing the angle formed by theblade arm 21A and theblade arm 31A. When rotated in the direction of increasing the angle formed by theblade arm 21A and theblade arm 31A, the firstmovable blade 2A and the secondmovable blade 3A are closed. - Then, when the first
movable blade 2A and the secondmovable blade 3A are closed, the angle formed by thefirst link 71A and thesecond link 72A becomes close to 180°. As the firstmovable blade 2A and the secondmovable blade 3A are closed, the angle formed by thefirst link 71A and thesecond link 72A of thetoggle link mechanism 7A becomes close to 180°, whereby thefirst link 71A and thesecond link 72A approach a state of being aligned along a straight line. - With this configuration, the cutting force generated using the
cutting edge portion 20A of the firstmovable blade 2A and thecutting edge portion 30A of the secondmovable blade 3A is increased in the state shown inFIG. 2 in which the firstmovable blade 2A and the secondmovable blade 3A are closed in comparison with the state shown inFIG. 1 in which the firstmovable blade 2A and the secondmovable blade 3A begin to be closed. - When the
motor 5 is driven and rotated in the direction of opening the firstmovable blade 2A and the secondmovable blade 3A, thenut portion 61 is moved linearly in the direction indicated by arrow F2 in accordance with the rotation direction of thescrew shaft 60. - When the
motor 5 is driven and rotated in a direction opposite to the predetermined direction and thenut portion 61 is moved linearly in the direction indicated by arrow F2, thedrive shaft 70A of thetoggle link mechanism 7A is moved linearly in the direction indicated by arrow F2, that is, a direction of moving away from theshaft 4A of the firstmovable blade 2A and the secondmovable blade 3A. - As shown in
FIG. 2 , when thedrive shaft 70A of thetoggle link mechanism 7A is moved linearly in the direction indicated by arrow F2 from a state in which the firstmovable blade 2A and the secondmovable blade 3A are closed, thefirst link 71A and thesecond link 72A are rotated in a direction of decreasing the angle formed by thefirst link 71A and thesecond link 72A while thedrive shaft 70A being moved linearly serves as a fulcrum. - The first
movable blade 2A having theblade arm 21A connected to thefirst link 71A and the secondmovable blade 3A having theblade arm 31A connected to thesecond link 72A are rotated around theshaft 4A serving as a fulcrum in a direction of decreasing the angle formed by theblade arm 21A and theblade arm 31A. When rotated in the direction of decreasing the angle formed by theblade arm 21A and theblade arm 31A, the firstmovable blade 2A and the secondmovable blade 3A are opened. -
FIG. 3 is a graph showing the relationship between a generated torque and a torque required for cutting. In theelectric scissors 1A shown inFIG. 1 , etc., the relationship between a torque required for cutting a branch having a certain diameter and supposed to be cut using theelectric scissors 1A and the angle formed by the firstmovable blade 2A and the secondmovable blade 3A is indicated using a solid line. In addition, the relationship between the angle formed by the firstmovable blade 2A and the secondmovable blade 3A and the generated torque is indicated using a broken line. - In
FIG. 3 , the vertical axis represents torque, and the horizontal axis represents blade angle. Blade angle=0(°) indicates a state in which the firstmovable blade 2A and the secondmovable blade 3A are opened as shown inFIG. 1 , and blade angle A(°) indicates a state in which the firstmovable blade 2A and the secondmovable blade 3A are closed as shown inFIG. 2 . Furthermore,blade angle 1/2A(°) indicates a state in which the firstmovable blade 2A and the secondmovable blade 3A are half opened. - Generally speaking, in the case of cutting a branch having a certain diameter, no large toque is required when the blades begin to be closed, but a large torque is required in a state in which the blades are closed approximately three-quarters of the entire blade angle. When it is assumed that the diameters of branches supposed to be cut using electric scissors are up to approximately 20 (mm), a similar tendency is observed regardless of the diameter.
- On the other hand, in the case of the
electric scissors 1A according to the first exemplary embodiment equipped with thetoggle link mechanism 7A, it is found that the generated torque thereof is increased as the firstmovable blade 2A and the secondmovable blade 3A are closed, in comparison with the torque generated when the firstmovable blade 2A and the secondmovable blade 3A begin to be closed. - For this reason, the
electric scissors 1A according to the first exemplary embodiment equipped with thetoggle link mechanism 7A can generate a necessary and sufficient torque in the latter half closing operation of the firstmovable blade 2A and the secondmovable blade 3A requiring a large torque in the case of cutting a branch. - Since the necessary and sufficient torque for cutting a branch can be generated by using the
toggle link mechanism 7A, the output of themotor 5 and the output of theball screw mechanism 6 can be reduced in accordance with the torque actually required to cut the branch. - More specifically, in the case that the output of the drive section is the same as that in the conventional apparatus, a cutting force approximately two times the maximum load for cutting a branch can be attained by using the
toggle link mechanism 7A. For this reason, even if the output of themotor 5 or theball screw mechanism 6 is reduced to approximately half, it is possible to obtain a force capable of cutting the branch. - As a result, the outputs of the
motor 5 and theball screw mechanism 6 can be reduced, and the durability of theball screw mechanism 6, etc. can be improved. In addition, theball screw mechanism 6, etc. can be made compact by reducing the outputs of themotor 5 and theball screw mechanism 6. In the case that theball screw mechanism 6, etc. can be made compact in size, the housing 9 being held in the hand of the user can be designed narrow, and the operability of the apparatus can be improved. Furthermore, since the outputs of themotor 5 and theball screw mechanism 6 can be reduced, the voltage of the battery for driving themotor 5 can be lowered. Consequently, the battery can be made compact in size and light in weight by reducing the number of cells in the battery, for example. - In the
electric scissors 1A according to the first exemplary embodiment, both the firstmovable blade 2A and the secondmovable blade 3A are movable. The rotation angle of the blades when the blades are closed should only be half the rotation angle obtained in a configuration in which one of the blades is a movable blade and the other is a fixed blade, provided that the opening angle of the blades is the same. Hence, in the case that the movement amount of the nut portion per rotation of the screw shaft is the same and the output of the ball screw mechanism is also the same in both the single blade drive type and the double blade drive type, the stroke of theball screw mechanism 6 in the double blade drive type can be made approximately half the stroke in the single blade drive type. Hence, the apparatus can be made compact in length. -
FIGS. 4 and 5 are side sectional views showing a configuration example of electric scissors according to a second exemplary embodiment;FIG. 4 shows a state in which the blades thereof are opened, andFIG. 5 shows a state in which the blades are closed. InFIGS. 4 and 5 , mechanisms for driving one of the blades of the electric scissors are shown, and the housing, the operation section, etc. thereof are not shown. -
Electric scissors 1B according to the second exemplary embodiment have amovable blade 2B and a fixedblade 3B, and themovable blade 2B is rotatably supported by ashaft 4B serving as a fulcrum. - In the
electric scissors 1B, the rotation of amotor 5 is converted into a linear motion using aball screw mechanism 6, and the drive power of themotor 5, the rotation of which is converted into a linear motion, is transmitted to themovable blade 2B using atoggle link mechanism 7B. As a result, themovable blade 2B is rotated around theshaft 4B serving as a fulcrum, thereby being opened/closed. - The respective components will be described below in detail. The
movable blade 2B, an example of a first blade, is equipped with acutting edge portion 20B disposed on one side of themovable blade 2B with respect to a position in which themovable blade 2B is supported by theshaft 4B and is also equipped with ablade arm 21A disposed on the other side of themovable blade 2B with respect to the position and serving as a transmission portion, the angle formed by thecutting edge portion 20B and theblade arm 21B being a predetermined obtuse angle. Thecutting edge portion 20B and theblade arm 21B of themovable blade 2B may be integrated into one component or may be independent components. - The fixed
blade 3B, an example of a second blade, is equipped with acutting edge portion 30B and ablade arm 31B serving as a transmission portion. Thecutting edge portion 30B and theblade arm 31B of the fixedblade 3B may be integrated into one component or may be independent components. - The drive shaft of the
motor 5 is connected to aspeed reducer 50 having planet gears, for example. Theball screw mechanism 6 is equipped with ascrew shaft 60 connected to the output shaft of thespeed reducer 50 and anut portion 61 in which balls, not shown, inserted in the screw groove of thescrew shaft 60 are built in. When thescrew shaft 60 is driven and rotated, thenut portion 61 is moved linearly along thescrew shaft 60. - In the
ball screw mechanism 6, the rotation of themotor 5 is converted into the linear motion of thenut portion 61. As a result, the movement direction of thenut portion 61 is switched depending on the rotation direction of themotor 5. - The
toggle link mechanism 7B is equipped with afirst link 71B and asecond link 72B rotatably connected to each other via adrive shaft 70B. In thetoggle link mechanism 7B, one end portion of thefirst link 71B is rotatably connected to theblade arm 21B of themovable blade 2B via ashaft 73B serving as a fulcrum. In addition, one end portion of thesecond link 72B is rotatably connected to theblade arm 31B of the fixedblade 3B via ashaft 74B serving as a fulcrum. Furthermore, the other end portion of thefirst link 71B is rotatably connected to the other end portion of thesecond link 72B via thedrive shaft 70B serving as a fulcrum. - The
drive shaft 70B of thetoggle link mechanism 7B is connected to thenut portion 61 via atransmission member 75 and is moved linearly in conjunction with the movement of thenut portion 61 obtained by the conversion of the rotation of themotor 5 into a linear motion using theball screw mechanism 6. - The
movable blade 2B is rotated around theshaft 4B serving as a fulcrum, thereby being opened/closed with respect to the fixedblade 3B. The blade is closed when the blade is rotated in a direction in which the angle formed by theblade arm 21B of themovable blade 2B and theblade arm 31B of the fixedblade 3B increases. - In the
toggle link mechanism 7B, the connection portion of thefirst link 71B and thesecond link 72B at thedrive shaft 70B is bent. In conjunction with the closing operation of themovable blade 2B, thefirst link 71B and thesecond link 72B are rotated while thedrive shaft 70B being moved linearly serves as a fulcrum in a direction of increasing the angle formed by thefirst link 71B and thesecond link 72B. Furthermore, the dimensions and angles of respective components are determined so that when themovable blade 2B is closed, the angle formed by thefirst link 71B and thesecond link 72B becomes close to 180°. - Next, the operation of the
electric scissors 1B according to the second exemplary embodiment will be described referring to the respective drawings. When themotor 5 is driven and rotated in a direction of closing themovable blade 2B, thenut portion 61 is moved linearly in the direction indicated by arrow F1 in accordance with the rotation direction of thescrew shaft 60. - When the
motor 5 is driven and rotated in a predetermined direction and thenut portion 61 is moved linearly in the direction indicated by arrow F1, thedrive shaft 70B of thetoggle link mechanism 7B connected to thenut portion 61 via thetransmission member 75 is moved linearly in a direction of approaching theshaft 4B of themovable blade 2B. The displacement of thedrive shaft 70B of thetoggle link mechanism 7B due to the linear movement thereof is transmitted to themovable blade 2B via thefirst link 71B. - As shown in
FIG. 4 , when thedrive shaft 70B of thetoggle link mechanism 7B is moved linearly from a state in which themovable blade 2B is opened, thefirst link 71B and thesecond link 72B, the connection portion therebetween being bent at thedrive shaft 70B, are rotated in the direction of increasing the angle formed by thefirst link 71B and thesecond link 72B while thedrive shaft 70B being moved linearly serves as a fulcrum. - The
movable blade 2B having theblade arm 21B connected to thefirst link 71B is rotated around theshaft 4B serving as a fulcrum in a direction of increasing the angle formed by theblade arm 21B and theblade arm 31B. When rotated in the direction of increasing the angle formed by theblade arm 21B and theblade arm 31B, themovable blade 2B is closed with respect to the fixedblade 3B. - Then, when the
movable blade 2B is closed, the angle formed by thefirst link 71B and thesecond link 72B becomes close to 180°. As themovable blade 2B is closed, the angle formed by thefirst link 71B and thesecond link 72B of thetoggle link mechanism 7B becomes close to 180°, whereby thefirst link 71B and thesecond link 72B approach a state of being aligned along a straight line. - With this configuration, the cutting force generated using the
cutting edge portion 20B of themovable blade 2B and thecutting edge portion 30B of the fixedblade 3B is increased in the state shown inFIG. 5 in which themovable blade 2B is closed in comparison with the state shown inFIG. 4 in which themovable blade 2B begins to be closed. - When the
motor 5 is driven and rotated in the direction of opening themovable blade 2B, thenut portion 61 is moved linearly in the direction indicated by arrow F2 in accordance with the rotation direction of thescrew shaft 60. - When the
motor 5 is driven and rotated in a direction opposed to the predetermined direction and thenut portion 61 is moved linearly in the direction indicated by arrow F2, thedrive shaft 70B of thetoggle link mechanism 7B connected to thenut portion 61 via thetransmission member 75 is moved linearly in a direction of moving away from theshaft 4B of themovable blade 2B. - As shown in
FIG. 5 , when thedrive shaft 70B of thetoggle link mechanism 7B is moved linearly from a state in which themovable blade 2B is closed, thefirst link 71B and thesecond link 72B, the connection portion therebetween being bent at thedrive shaft 70B, are rotated in a direction of decreasing the angle formed by thefirst link 71B and thesecond link 72B while thedrive shaft 70B being moved linearly serves as a fulcrum. - The
movable blade 2B having theblade arm 21B connected to thefirst link 71B is rotated around theshaft 4B serving as a fulcrum in a direction of decreasing the angle formed by theblade arm 21B and theblade arm 31B. When rotated in the direction of decreasing the angle formed by theblade arm 21B and theblade arm 31B, themovable blade 2B is opened with respect to the fixedblade 3B. - While description has been made in connection with specific exemplary embodiments of the invention, it will be obvious to those skilled in the art that various changes and modification may be made therein without departing from the present invention.
- For example, in the exemplary embodiments referred in the above, the
motor 5 and theball screw mechanism 6 are used as the drive section for displacing thedrive shaft drive shaft motor 5 to the linear motion, any well known structures other than theball screw mechanism 6 can be used. Moreover, an electromagnetic solenoid actuator, a linear motor, or the like can be used as the drive section, instead of the combination of themotor 5 and theball screw mechanism 6. - 1A, 1B . . . electric scissors, 2A . . . first movable blade, 2B . . . movable blade, 3A . . . second movable blade, 3B . . . fixed blade, 4A, 4B . . . shaft, 5 . . . motor, 6 . . . ball screw mechanism, 7A, 7B . . . toggle link mechanism, 70A, 705 . . . drive shaft, 71A, 71B . . . first link, 72A, 72B . . . second link
Claims (4)
1. Electric scissors comprising:
a first blade including a cutting edge portion and a transmission portion, and rotatably supported by a shaft serving as a fulcrum;
a second blade including a cutting edge portion and a transmission portion, wherein an object between the first blade and the second blade is cut by closing the first blade and the second blade;
a toggle link mechanism including a first link, a second link, and a drive shaft; and
a drive section,
wherein one end of the first link is rotatably connected to said transmission portion of the first blade,
one end of the second link is rotatably connected to said transmission portion of the second blade,
the other end of the first link is rotatably connected to the other end of the second link through the drive shaft, and
the drive section is configured
to close the first blade and the second blade by displacing said drive shaft in a direction of increasing an angle between the first link and the second link, and
to open the first blade and the second blade by displacing said drive shaft in a direction of decreasing said angle between the first link and the second link.
2. The electric scissors according to claim 1 , wherein the second blade is rotatably supported by said shaft serving as a fulcrum.
3. The electric scissors according to claim 1 , wherein said angle between the first link and the second link becomes close to 180°, when the first blade and the second blade are closed to a maximum extent.
4. The electric scissors according to claim 1 , wherein the drive section includes a motor to be rotatably driven, and a ball screw mechanism configured to convert a rotation of the motor into a linear motion and to transmit the linear motion to said drive shaft of said toggle link mechanism.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/896,143 US9832936B2 (en) | 2009-01-30 | 2013-05-16 | Electric scissors |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009020890A JP5332662B2 (en) | 2009-01-30 | 2009-01-30 | Electric scissors |
JP2009-020890 | 2009-01-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/896,143 Continuation US9832936B2 (en) | 2009-01-30 | 2013-05-16 | Electric scissors |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100192383A1 true US20100192383A1 (en) | 2010-08-05 |
Family
ID=42122761
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/695,438 Abandoned US20100192383A1 (en) | 2009-01-30 | 2010-01-28 | Electric scissors |
US13/896,143 Active US9832936B2 (en) | 2009-01-30 | 2013-05-16 | Electric scissors |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/896,143 Active US9832936B2 (en) | 2009-01-30 | 2013-05-16 | Electric scissors |
Country Status (5)
Country | Link |
---|---|
US (2) | US20100192383A1 (en) |
EP (1) | EP2213426B1 (en) |
JP (1) | JP5332662B2 (en) |
CN (1) | CN101790941B (en) |
ES (1) | ES2544454T3 (en) |
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Citations (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US499938A (en) * | 1893-06-20 | Animal-shears | ||
US728068A (en) * | 1903-02-16 | 1903-05-12 | Wesley Young | Pneumatic pruning-shears. |
US914731A (en) * | 1908-09-21 | 1909-03-09 | Louis Klitsch | Hedge-trimmer. |
US1592017A (en) * | 1924-04-03 | 1926-07-13 | George Van Campen | Pliers |
US2490086A (en) * | 1945-05-12 | 1949-12-06 | Herbert E Page | Electrically operated shears |
US3178816A (en) * | 1963-04-12 | 1965-04-20 | Arvin E Schmid | Power pruning shears |
US3666975A (en) * | 1970-05-18 | 1972-05-30 | Ultrasonic Systems | Ultrasonic motors |
US3693254A (en) * | 1970-08-26 | 1972-09-26 | Albert R Salonen | Motorized shearing implement |
US3893237A (en) * | 1973-08-03 | 1975-07-08 | Donald E Jahnke | Poultry cutter |
US4080733A (en) * | 1976-08-05 | 1978-03-28 | Clegg John E | Wire cutting pliers |
US4506445A (en) * | 1983-02-22 | 1985-03-26 | Hale Fire Pump Company | Rescue cutter tool |
DE8802877U1 (en) * | 1987-03-06 | 1988-05-11 | Va Ri Me Srl | |
US5002135A (en) * | 1987-04-28 | 1991-03-26 | Etablissements Pellenc Et Motte (S.A.) | Portable electric tool |
US5243761A (en) * | 1992-03-18 | 1993-09-14 | Hale Fire Pump Company | Portable rescue tool |
US5272811A (en) * | 1991-06-20 | 1993-12-28 | Hydr'am | Hydraulically controlled self-contained multifunctional tool such as shears/separator |
US5312434A (en) * | 1992-12-21 | 1994-05-17 | Lawrence Crainich | Medical instrument |
US5738289A (en) * | 1995-02-01 | 1998-04-14 | Sangojuuki Co., Ltd. | Crusher |
US5875554A (en) * | 1996-12-24 | 1999-03-02 | Rescue Technology, Inc. | Rescue tool |
US5953822A (en) * | 1996-12-24 | 1999-09-21 | Rescue Technology, Inc. | Rescue tool |
US6044564A (en) * | 1996-04-27 | 2000-04-04 | J. Wagner Gmbh | Branch cutter tool |
US6971179B2 (en) * | 2002-09-27 | 2005-12-06 | Electroline Corporation | Cutting tool |
US7100373B2 (en) * | 2002-06-14 | 2006-09-05 | Kabushiki Kaisha Ogura | Hydraulic tool |
US7284720B2 (en) * | 1999-10-15 | 2007-10-23 | Ramun John R | Multiple tool attachment system with universal body |
US7331109B2 (en) * | 2006-05-12 | 2008-02-19 | Shu-Woan Tu | Electric cutting device |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1537933A (en) | 1924-04-25 | 1925-05-19 | Hill Pump Valve Company | Valve |
US3535783A (en) * | 1968-04-29 | 1970-10-27 | Associated Compressor & Equipm | Pneumatic cutter |
IT1036782B (en) * | 1975-08-25 | 1979-10-30 | Calligaro Riccardo | PNEUMATIC SCISSOR WITH TWO STANTUF FI ON A SINGLE AXIS |
US4376340A (en) * | 1981-05-07 | 1983-03-15 | Michael Ramun | Material handling and shearing attachment for a backhoe |
JPS6274923A (en) | 1985-09-30 | 1987-04-06 | Mitsui Petrochem Ind Ltd | Novel epoxy resin |
JPH028651Y2 (en) * | 1985-10-29 | 1990-03-01 | ||
JPS6391315A (en) | 1986-10-06 | 1988-04-22 | Iwao Shimizu | Trichogenic promoter |
JPH0344415Y2 (en) * | 1986-11-28 | 1991-09-18 | ||
US4838493B1 (en) * | 1988-06-10 | 1994-12-06 | Labounty Manufacturing | Concrete crusher |
US5142779A (en) * | 1991-12-02 | 1992-09-01 | Labounty Manufacturing, Inc. | Mobile wood and tire shear |
JPH08163728A (en) * | 1994-12-05 | 1996-06-21 | Toshin Denki Kk | Electric wire cutting tool |
JP3027017U (en) * | 1995-09-26 | 1996-07-30 | 株式会社ブルーボール | Electric twig cutter |
JPH09117574A (en) * | 1996-10-03 | 1997-05-06 | Wessel Giken Kogyo Kk | Opening and closing operation device |
JP3537649B2 (en) | 1997-10-30 | 2004-06-14 | 株式会社マキタ | Electric pruning scissors |
JP2005052384A (en) | 2003-08-05 | 2005-03-03 | Kyameru Japan Kk | Electric scissors |
CN2900106Y (en) * | 2006-04-29 | 2007-05-16 | 杜书挽 | Electric clamp structure |
JP5034348B2 (en) * | 2006-07-20 | 2012-09-26 | マックス株式会社 | Electric scissors |
JP2008043992A (en) * | 2006-08-21 | 2008-02-28 | Murata Mach Ltd | Linear motor-mounted press machine |
US20080289186A1 (en) * | 2007-05-15 | 2008-11-27 | Adams Allan R | Scissor shear apparatus for shearing material |
AT508243B1 (en) * | 2009-06-25 | 2010-12-15 | Lunatone Ind Elektronik Gmbh | ELECTRIC SCISSORS |
-
2009
- 2009-01-30 JP JP2009020890A patent/JP5332662B2/en active Active
-
2010
- 2010-01-27 EP EP10000821.8A patent/EP2213426B1/en active Active
- 2010-01-27 ES ES10000821.8T patent/ES2544454T3/en active Active
- 2010-01-28 US US12/695,438 patent/US20100192383A1/en not_active Abandoned
- 2010-01-29 CN CN201010106767.4A patent/CN101790941B/en active Active
-
2013
- 2013-05-16 US US13/896,143 patent/US9832936B2/en active Active
Patent Citations (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US499938A (en) * | 1893-06-20 | Animal-shears | ||
US728068A (en) * | 1903-02-16 | 1903-05-12 | Wesley Young | Pneumatic pruning-shears. |
US914731A (en) * | 1908-09-21 | 1909-03-09 | Louis Klitsch | Hedge-trimmer. |
US1592017A (en) * | 1924-04-03 | 1926-07-13 | George Van Campen | Pliers |
US2490086A (en) * | 1945-05-12 | 1949-12-06 | Herbert E Page | Electrically operated shears |
US3178816A (en) * | 1963-04-12 | 1965-04-20 | Arvin E Schmid | Power pruning shears |
US3666975A (en) * | 1970-05-18 | 1972-05-30 | Ultrasonic Systems | Ultrasonic motors |
US3693254A (en) * | 1970-08-26 | 1972-09-26 | Albert R Salonen | Motorized shearing implement |
US3893237A (en) * | 1973-08-03 | 1975-07-08 | Donald E Jahnke | Poultry cutter |
US4080733A (en) * | 1976-08-05 | 1978-03-28 | Clegg John E | Wire cutting pliers |
US4506445A (en) * | 1983-02-22 | 1985-03-26 | Hale Fire Pump Company | Rescue cutter tool |
DE8802877U1 (en) * | 1987-03-06 | 1988-05-11 | Va Ri Me Srl | |
US5002135A (en) * | 1987-04-28 | 1991-03-26 | Etablissements Pellenc Et Motte (S.A.) | Portable electric tool |
US5272811A (en) * | 1991-06-20 | 1993-12-28 | Hydr'am | Hydraulically controlled self-contained multifunctional tool such as shears/separator |
US5243761A (en) * | 1992-03-18 | 1993-09-14 | Hale Fire Pump Company | Portable rescue tool |
US5312434A (en) * | 1992-12-21 | 1994-05-17 | Lawrence Crainich | Medical instrument |
US5738289A (en) * | 1995-02-01 | 1998-04-14 | Sangojuuki Co., Ltd. | Crusher |
US6044564A (en) * | 1996-04-27 | 2000-04-04 | J. Wagner Gmbh | Branch cutter tool |
US5875554A (en) * | 1996-12-24 | 1999-03-02 | Rescue Technology, Inc. | Rescue tool |
US5953822A (en) * | 1996-12-24 | 1999-09-21 | Rescue Technology, Inc. | Rescue tool |
US7284720B2 (en) * | 1999-10-15 | 2007-10-23 | Ramun John R | Multiple tool attachment system with universal body |
US7100373B2 (en) * | 2002-06-14 | 2006-09-05 | Kabushiki Kaisha Ogura | Hydraulic tool |
US6971179B2 (en) * | 2002-09-27 | 2005-12-06 | Electroline Corporation | Cutting tool |
US7331109B2 (en) * | 2006-05-12 | 2008-02-19 | Shu-Woan Tu | Electric cutting device |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120246942A1 (en) * | 2011-03-31 | 2012-10-04 | Chervon (Hk) Limited | Power pruner |
EP2540460A1 (en) | 2011-06-28 | 2013-01-02 | Max Co., Ltd. | Electric scissors |
US9120235B2 (en) | 2011-06-28 | 2015-09-01 | Max Co., Ltd. | Electric scissors |
US20130019482A1 (en) * | 2011-07-22 | 2013-01-24 | Chervon (Hk) Limited | Electric pruner |
US9179605B2 (en) * | 2011-07-22 | 2015-11-10 | Chervon (Hk) Limited | Electric pruner with a quick-release mechanism |
US9521810B2 (en) | 2012-05-04 | 2016-12-20 | Felco Motion Sa | Handheld power tool |
US20150121706A1 (en) * | 2012-07-06 | 2015-05-07 | Felco Motion Sa | Handheld power tool |
US9168667B2 (en) * | 2012-07-06 | 2015-10-27 | Felco Motion Sa | Handheld power tool |
RU2807612C2 (en) * | 2018-12-26 | 2023-11-17 | Нагаки Сэйки Ко., Лтд. | Tool |
USD891214S1 (en) * | 2020-04-03 | 2020-07-28 | Yongkang Weide Industry And Trade Co., Ltd. | Electric pruning shear |
USD926543S1 (en) * | 2020-04-28 | 2021-08-03 | Wenwu Chen | Electric scissor |
CN111903360A (en) * | 2020-08-11 | 2020-11-10 | 洪阿花 | Tea leaf pruning equipment for tea planting |
USD930449S1 (en) * | 2020-09-30 | 2021-09-14 | Wenwu Chen | Electric scissors |
USD1000243S1 (en) * | 2021-07-09 | 2023-10-03 | Suzhou Ailixi Brushless Motor Co., Ltd. | Electric scissors |
USD966853S1 (en) * | 2021-12-22 | 2022-10-18 | Wenwu Chen | Electric scissors |
USD1003137S1 (en) * | 2022-03-25 | 2023-10-31 | Innovation Fabrication Commercialisation Infaco | Hedge trimmer |
USD1008767S1 (en) * | 2022-05-10 | 2023-12-26 | Zhejiang Guyuehu Industry & Trade Co., Ltd. | Electric pruning shear |
USD1011855S1 (en) * | 2022-05-19 | 2024-01-23 | Zhejiang Guyuehu Industry & Trade Co., Ltd. | Electric pruning shear |
USD1011854S1 (en) * | 2022-05-19 | 2024-01-23 | Zhejiang Guyuehu Industry & Trade Co., Ltd. | Electric pruning shear |
Also Published As
Publication number | Publication date |
---|---|
JP5332662B2 (en) | 2013-11-06 |
EP2213426A1 (en) | 2010-08-04 |
CN101790941B (en) | 2014-12-17 |
EP2213426B1 (en) | 2015-05-27 |
US20130247384A1 (en) | 2013-09-26 |
CN101790941A (en) | 2010-08-04 |
JP2010172622A (en) | 2010-08-12 |
ES2544454T3 (en) | 2015-08-31 |
US9832936B2 (en) | 2017-12-05 |
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Legal Events
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AS | Assignment |
Owner name: MAX CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ISHIGURO, HIROKI;REEL/FRAME:023865/0082 Effective date: 20100120 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |