Electric scissors

Abstract

To provide electric scissors that are adaptable to a plurality of applications, and have improved convenience.SOLUTION: Electric pruning scissors 1 for pruning plants comprise: a body part 2; a cutting unit 3 having two blades at least one of which is a movable blade 32; a mounting part 23 which is formed on the body part 2, and is used for mounting the cutting unit 3; an electric motor 8a which applies driving force to the movable blade 32; a power supply part 6 which supplies electric power to the electric motor 8a; and a rotary member 9 which is laid between the electric motor 8a and the cutting unit 3, and transmits the driving force of the electric motor 8a to the movable blade 32, where the cutting unit 3 includes a cutting unit 3A of a first type and a cutting unit 3B of a second type which is a different type from the cutting unit 3A of the first type, and either the cutting unit 3A of the first type or the cutting unit 3B of the second type is selectively mounted to the mounting part 23.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to electric scissors used, for example, for cutting the branches, leaves, stems, etc. of plants. [Background technology]

[0002] Conventionally, pruning scissors that operate the blades by driving a motor have been proposed as scissors used for cutting (prune) the branches, leaves, stems, etc. of plants (see Patent Document 1). When the trigger of these pruning scissors is pulled and tilted, the motor starts and the movable blade closes relative to the fixed blade, allowing the cutting of the object to be cut.

[0003] However, when pruning plants, it is necessary to prepare multiple scissors of different types (shapes and materials) appropriate for the type of object to be cut (for example, hedges, tall branches, fruit trees, etc.), which is inconvenient. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2-238819 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT DISCLOSURE In view of the above problems, an object of the present invention is to provide electric scissors that can be used for multiple purposes and have improved convenience. [Means for solving the problem]

[0006] The present invention is an electric scissors for cutting plants, comprising a main body, a cutting unit having two blades, at least one of which is a movable blade, an attachment portion formed on the main body for attaching the cutting unit, a drive portion for applying a driving force to the movable blade, a power supply portion for supplying power to the drive portion, and a transmission member interposed between the drive portion and the cutting unit for transmitting the driving force to the movable blade, wherein the cutting unit includes a first type of cutting unit that directly connects the movable blade to the transmission member, and a second type of cutting unit that indirectly connects the movable blade to the transmission member via a movable member different from the movable blade, and the electric scissors are characterized in that either the first type of cutting unit or the second type of cutting unit is selectively attached to the attachment portion. Effect of the Invention

[0007] According to the present invention, it is possible to provide electric scissors that can be used for a variety of purposes and have improved convenience. [Brief description of the drawings]

[0008] [Figure 1] Schematic diagram showing the main body and internal structure of electric pruning shears. [Diagram 2] FIG. 1 is a front view of an electric pruning shears according to a first embodiment. [Diagram 3] 1 is a perspective view showing a partially disassembled state of electric pruning shears according to a first embodiment; [Figure 4] FIG. 11 is a front view of electric pruning shears according to a second embodiment. [Diagram 5] FIG. 11 is a perspective view showing a partially disassembled state of electric pruning shears according to a second embodiment. [Figure 6] FIG. 11 is a perspective view showing a connection portion between a main body and a cutting unit in an electric pruning shears according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a schematic diagram showing a main body 2 and an internal structure of electric pruning shears 1 according to one embodiment of the present invention. Fig. 2 is a front view of electric pruning shears 1 according to the first embodiment. Fig. 3 is a perspective view showing electric pruning shears 1 according to the first embodiment in a partially disassembled state. Fig. 4 is a front view of electric pruning shears 1 according to a second embodiment. Fig. 5 is a perspective view showing electric pruning shears 1 according to the second embodiment in a partially disassembled state.

[0010] The electric pruning shears 1 of the present invention are electric scissors used for cutting (pruning) the branches, leaves, stems, etc. of various plants. As shown in Fig. 1, the electric pruning shears 1 have a main body 2 extending in a certain direction and having a longitudinal direction, a cutting unit 3 provided at one end of the main body 2 in the longitudinal direction, an operating unit 4 for operating the cutting unit 3, an operating mechanism 5 for opening and closing (operating) the cutting unit 3, a power supply unit 6 for supplying power to the operating mechanism 5, and a control unit 7 for controlling the operation of each part of the electric pruning shears 1.

[0011] The orientation of each part of the electric pruning shears 1 changes depending on the posture when the electric pruning shears 1 is held by a user, but for convenience of explanation, in this specification, the longitudinal direction of the main body 2 is defined as the front-rear direction, the direction horizontally perpendicular to the longitudinal direction of the main body 2 is defined as the left-right direction, and the directions perpendicular to both the front-rear direction and the left-right direction are defined as the up-down direction. Also, the side on which the cutting unit 3 is provided in the front-rear direction is defined as the front side, the right hand side when facing forward is defined as the right direction in the left-right direction, and the left hand side when facing forward is defined as the left direction.

[0012] As shown in Figures 1 to 5, the main body 2 has a housing 21 that forms the outer shell of the main body 2, a grip portion 22 formed of a material having a greater frictional force (friction coefficient) than the housing 21, and an attachment portion 23 for attaching the cutting unit 3.

[0013] The housing 21 is made of a material such as resin and has a generally cylindrical shape extending in the front-rear direction. The internal space of the housing 21 accommodates an operating mechanism 5, a power supply unit 6, and a control unit 7. The housing 21 (main body 2) is formed generally symmetrically with respect to the center of the width of the main body 2.

[0014] A user (operator) can grip the center of the longitudinal direction of the housing 21 as a gripping portion. The grip portions 22 are attached to the left and right outer surfaces of the longitudinal center portion of the housing 21. The grip portions 22 are formed of a material such as rubber or resin.

[0015] Returning to Fig. 1, the attachment part 23 is provided at the front end part of the main body part 2. In this embodiment, the attachment part 23 is provided at the right side surface (right face) of the front end part of the main body part 2. Therefore, the attachment and detachment direction of the cutting unit 3 is the left-right direction. The attachment part 23 is provided with a cover fixing screw hole 24, a positioning hole 25, a rotation prevention hole 26, an opening part 27, and a groove part 28.

[0016] The cover fixing screw holes 24 are screw holes for fixing a cover 50 (see Figs. 3 and 5) described later. The cover fixing screw holes 24 extend in the left-right direction and are formed so as to open to the right. Two of the cover fixing screw holes 24 are provided on either side of the positioning hole 25.

[0017] The positioning hole 25 is provided in the center of the mounting portion 23 in the up-down direction and at the front end of the mounting portion 23 in the front-rear direction. The positioning hole 25 is formed in a metal plate 23a fixed to the housing 21. This positioning hole 25 is a through hole extending in the left-right direction and is a two-stage hole whose cross section changes midway. Specifically, the positioning hole 25 has a first stage with a circular cross section and a second stage with a straight portion in the cross section (for example, an oval cross section). In the positioning hole 25, the first stage is located on the right side and the second stage is located on the left side.

[0018] The anti-rotation (fixing) hole 26 is provided in the center of the mounting portion 23 in the up-down direction and at the front end in the front-rear direction of the mounting portion 23. It is formed in the metal plate 23a. The anti-rotation hole 26 is a through hole that has a generally circular cross section and extends in the left-right direction.

[0019] The opening 27 is provided in the center of the mounting portion 23 in the up-down direction and at the rear end in the front-rear direction of the mounting portion 23. The opening 27 communicates the internal space of the main body 2 with the external space.

[0020] Groove portion 28 is located rearward of positioning hole 25, and has a groove (recess) formed in an arc shape with a predetermined width centered on the central axis of positioning hole 25. Groove portion 28 is disposed so as to overlap with opening 27. In other words, opening 27 is formed in the center of groove portion 28 in the up-down direction.

[0021] The operation unit 4 is provided on the front end side (front side) of the main body 2 from the center in the longitudinal direction, and has a trigger lever 41 and an operation finger protection unit 42, part of which protrudes to the outside from the housing 21. The trigger lever 41 functions as an operation input unit that receives an operation input for operating the cutting unit 3.

[0022] The trigger lever 41 is rotatably supported inside the main body 2, and rotates when force is applied. An operation detection sensor for detecting that the trigger lever 41 has been operated (rotated) is also provided inside the main body 2. The operation detection sensor is electrically connected to the control unit 7, and sends a signal corresponding to the operation of the trigger lever 41 to the control unit 7. Note that a trigger button may be provided instead of the trigger lever 41.

[0023] Moreover, one end of the operation finger protection part 42 is connected (coupled) to the underside of the main body part 2 in front of the operation part 4, and the other end is connected (coupled) to the underside of the main body part 2 behind the operation part 4. That is, the operation finger protection part 42 is formed to form an operation hole surrounding the operation part 4. However, the operation finger protection part 42 has a space that allows the user to move his / her finger sufficiently when operating the operation part 4. In this embodiment, the operation finger protection part 42 is formed of a rod-shaped member that is curved so as to protrude downward when viewed from the operation part 4. The operation finger protection part 42 may be formed integrally with the main body part 2 (as a part of the main body part 2), or may be formed as a member separate from the main body part 2.

[0024] As shown in FIG. 1, the operating mechanism 5 includes an electric motor 8a that generates a rotational driving force, a first transmission element 8b that is mechanically connected to a movable member of the cutting unit 3, and a second transmission element 8c that transmits the rotational driving force of the electric motor 8a to the first transmission element 8b. For example, the electric motor 8a is a general-purpose rotary motor and is disposed on the other end side (rear side) of the main body 2 from the center in the longitudinal direction. The second transmission element 8c is a transmission shaft mechanically connected to the motor shaft of the electric motor 8a. The first transmission element 8b is a bevel gear (first gear) mechanically connected to the front end of the second transmission element 8c. The first transmission element 8b is disposed so as to protrude outward from the bottom surface of the groove 28.

[0025] The power supply unit 6 includes at least one of a built-in battery built into the main body 2, a detachable battery detachable from the main body 2, and a power cable connected to a commercial power source. In this embodiment, the power supply unit 6 has a detachable battery 61 detachable from the main body 2.

[0026] The control unit 7 includes a CPU, a memory, and the like, and receives signals from each part of the electric pruning shears 1 and transmits control signals to each part of the electric pruning shears 1 to perform various controls. For example, the control unit 7 executes processing for controlling the opening and closing operation of the cutting unit 3.

[0027] 2 to 5, the cutting unit 3 is provided at one end in the longitudinal direction of the main body 2, and has a function of clamping and cutting an object to be cut (such as a plant) between two blades, at least one of which is a movable blade. Specifically, the cutting unit 3 has a fixed blade 31 that is fixed relatively to the main body 2, and a movable blade 32 that is displaceable (movable) relative to the main body 2 and opens and closes opposite the fixed blade 31.

[0028] The cutting unit 3 includes a plurality of types of cutting units suited to the type of object to be cut, and any one of the plurality of types of cutting units can be selectively attached to the attachment portion 23. In other words, different types of cutting units can be replaced and used according to the purpose of using the electric pruning shears 1.

[0029] The type of cutting unit 3 may be one in which at least one blade is a movable blade 32, and may be one in which only one blade is movable, or one in which both blades are movable. For example, the types of cutting units 3 include those for pruning shears for cutting (prune) stems and branches, those for pole pruners for cutting high-placed tree branches, those for high-placed work for clamping objects without cutting, and those for pruning clippers for trimming hedges and tea plants. Hereinafter, the types of cutting units 3 will be described by taking as examples an embodiment (first embodiment) using a cutting unit 3A for pruning shears and an embodiment (second embodiment) using a cutting unit 3B for pole pruners.

[0030] 2 and 3, the cutting unit 3A for pruning shears has a fixed blade 31 and a movable blade 32. The fixed blade 31 and the movable blade 32 are arranged near the main body 2 (attachment portion 23) in order to cut stems, branches, etc. near the main body 2 (at the user's hand).

[0031] The fixed blade 31 is made of metal and has a plate shape, and the front end side functions as the fixed blade cutting part 31a that sandwiches the cutting object between the fixed blade cutting part 31a and the movable blade 32. The fixed blade 31 also has a positioning hole 31b located behind the fixed blade cutting part 31a, and a rotation prevention hole 31c located further behind the positioning hole 31b. The relative positions of the positioning hole 31b and the rotation prevention hole 31c in the front-rear and up-down directions are the same as the relative positions of the positioning hole 25 and the rotation prevention hole 26 of the mounting part 23 in the front-rear and up-down directions. The positioning hole 31b is formed to fit into the first stage (circular section) of the positioning hole 25 of the mounting part 23. The rotation prevention hole 31c is a screw hole with a screw thread cut on the inner peripheral surface, and is formed to extend in the left-right direction and open to the left.

[0032] The movable blade 32 is in the form of a metal plate, and the front end side functions as the movable blade cutting portion 32a that sandwiches the object to be cut between the movable blade 32 and the fixed blade 31. The movable blade cutting portion 32a is formed so that its thickness gradually decreases toward the side facing the fixed blade 31.

[0033] In addition, the movable blade 32 has a positioning hole 32b, which is a through hole located rearward of the fixed blade cutting portion 31a (at the rear end of the movable blade 32), and a driving force transmission hole 32c, which is a through hole located between the positioning hole 32b and the movable blade cutting portion 32a.

[0034] As shown in Fig. 3, the electric pruning shears 1 includes a rotating member (transmission member) 9 that is interposed between the operating mechanism 5 (first transmission element 8b) and the cutting unit 3 and serves to operate the cutting unit 3. The electric pruning shears 1 also includes a first fixing bolt 10, a nut 11, a second fixing bolt 12, and a rotation-stop member 13 that serve as members for attaching the cutting unit 3 to the main body 2. The rotating member 9, the first fixing bolt 10, the nut 11, the second fixing bolt 12, and the rotation-stop member 13 are all common parts that are used regardless of the type of cutting unit 3.

[0035] The rotating member 9 is a plate-like metal member, and has a positioning hole 91 which is a through hole, a gear part (second gear) 92 formed on one surface of the rotating member 9, and a driving force transmitting protrusion 93 formed on one surface of the rotating member 9 (the same surface as the surface on which the gear part 92 is formed). The relative positions of the positioning hole 91 and the driving force transmitting protrusion 93 in the front-rear and up-down directions are the same as the relative positions of the positioning hole 32b and the driving force transmitting hole 32c of the movable blade 32 in the front-rear and up-down directions. The driving force transmitting protrusion 93 is a columnar or cylindrical protrusion, and the outer diameter of the driving force transmitting protrusion 93 is slightly smaller than the inner diameter of the driving force transmitting hole 32c. Therefore, the driving force transmitting protrusion 93 can be fitted into the driving force transmitting hole 32c.

[0036] The gear portion (second gear) 92 is a gear that can mesh with the first transmission element 8b (first gear). The gear portion 92 is formed in an arc shape with a predetermined width centered on the central axis of the positioning hole 91.

[0037] The first fixing bolt 10 has a screw-fitting portion 10a, a non-circular portion 10b, and a circular portion 10c, in that order from the tip. The screw-fitting portion 10a is a portion with a thread cut on the outer circumferential surface. The non-circular portion 10b is a portion with a non-circular cross section, and is configured to have a shape that corresponds to (is capable of fitting into) the second stage of the positioning hole 25. The circular portion 10c is a portion with a circular cross section. The outer diameter of the circular portion 10c is smaller than the inner diameters of the positioning hole 31b of the fixed blade 31, the positioning hole 32b of the movable blade 32, and the positioning hole 91 of the rotating member 9. The axial length of the circular portion 10c is set to be longer than the total thickness when the fixed blade 31, the movable blade 32, and the rotating member 9 are overlapped.

[0038] The nut 11 is a member that can be screwed onto the screw-threaded portion 10a of the first fixing bolt 10. On the outer circumferential surface of the nut 11, a rotation-preventing gear (first rotation-preventing gear) 11a is formed.

[0039] The second fixing bolt 12 is a member that can be screwed into the anti-rotation hole 31c of the fixed blade 31. The anti-rotation member 13 is a disk-shaped member, and a gear (second anti-rotation gear) 13a that meshes with the first anti-rotation gear 11a of the nut 11 is formed on the outer circumferential surface.

[0040] The fixed blade 31, the movable blade 32, and the rotating member 9 are stacked on top of each other and detachably attached to the positioning hole 25 of the mounting portion 23 (metal plate 23a). Here, the fixed blade 31, the movable blade 32, and the rotating member 9 are stacked in this order from the side closest to the mounting portion 23.

[0041] In addition, the positioning hole 31b of the fixed blade 31, the positioning hole 32b of the movable blade 32, and the positioning hole 91 of the rotating member 9 are attached to the positioning hole 25 so that their respective central axes overlap (are coaxial) and also overlap with the central axis of the positioning hole 25.

[0042] Specifically, the first fixing bolt 10 is inserted from the outside (right side) of the rotating member 9 through the positioning hole 91 of the rotating member 9, the positioning hole 32b of the movable blade 32, the positioning hole 31b of the fixed blade 31, and the positioning hole 25 of the mounting part 23, and the screwing part 10a of the first fixing bolt 10 is screwed into the nut 11 on the opposite side (left side) of the positioning hole 25 (metal plate 23a), thereby mounting the fixed blade 31, the movable blade 32, and the rotating member 9 to the mounting part 23 (positioning hole 25). In this way, the fixed blade 31, the movable blade 32, and the rotating member 9 are mounted to the mounting part 23 (main body part 2) with reference to the positioning hole 25. In other words, the positioning hole 25 also functions as a positioning part that positions the cutting unit 3 with respect to the main body part 2.

[0043] At this time, the second fixing bolt 12 is inserted from the left side of the metal plate 23a so as to pass through the anti-rotation member 13 and the anti-rotation hole 26, and on the opposite side of the metal plate 23a, i.e., the side on which the fixed blade 31 is attached, the second fixing bolt 12 is screwed into the anti-rotation hole 31c of the fixed blade 31. As a result, the fixed blade 31 is fixed so as not to move relative to the attachment part 23 (metal plate 23a) or the main body part 2.

[0044] With the fixed blade 31, the movable blade 32, and the rotating member 9 attached to the attachment portion 23, a first type of cover 50A (50) for the pruning shears cutting unit 3A is attached to cover the fixed blade 31, the movable blade 32, the rotating member 9, and the attachment portion 23. When the first type of cover 50A is attached to the main body portion 2, it is fixed to the housing 21 (main body portion 2) by a fastening member 51 that is fastened to a cover fixing screw hole 24 formed in the housing 21 (main body portion 2).

[0045] In addition, when the fixed blade 31, the movable blade 32, and the rotating member 9 are attached to the attachment portion 23, the movable blade 32 and the rotating member 9 can rotate about the central axis of the positioning hole 25 (positioning hole 32b and positioning hole 91). In this state, the gear part 92 of the rotating member 9 and the first transmission element 8b (first gear) are in mesh. That is, the cutting unit 3A for pruning shears is configured to directly connect the movable blade 32 to the rotating member 9. Therefore, the rotating member 9 can receive the rotational driving force of the electric motor 8a via the first transmission element 8b. In addition, in the attachment portion 23, the gear part 92 of the rotating member 9 is displaced along the groove part 28. Therefore, the rotating member 9 can rotate without interfering with the main body part 2.

[0046] Furthermore, in a state where the fixed blade 31, the movable blade 32, and the rotating member 9 are attached to the attachment portion 23, the driving force transmission projection 93 of the rotating member 9 is fitted into the driving force transmission hole 32c of the movable blade 32. Therefore, when the rotating member 9 rotates by receiving the rotational driving force of the electric motor 8a, the movable blade 32 rotates in conjunction with the rotating member 9 (rotates together). In other words, by driving the electric motor 8a, the movable blade 32 can be rotated and opened / closed relative to the fixed blade 31, and the movable blade cutting portion 32a of the movable blade 32 and the fixed blade cutting portion 31a of the fixed blade 31 function as scissors to cut an object to be cut, such as a branch.

[0047] Fig. 6 is a perspective view showing a connection portion between the main body 2 and the cutting unit 3 of the electric pruning shears 1 of the second embodiment. Hereinafter, the cutting unit 3B for pole pruners of the present invention will be described with reference to Figs. 4 to 6, and the same components as those of the cutting unit 3A for pruning shears (common components) are given the same reference numerals, and descriptions of overlapping contents will be omitted or will be described briefly.

[0048] As shown in Figures 4 to 6, the cutting unit 3B for pole pruners is configured so that a fixed blade 31 and a movable blade 32 are disposed at a position away from the main body 2 (mounting portion 23) in order to cut branches and the like high up in trees.

[0049] The cutting unit 3B for pole pruners has a fixed blade 31, a movable blade 32, a first link mechanism 33, a link rod 34, a cylindrical handle portion 35, a second link mechanism 36, and a fixed member 37.

[0050] The first link mechanism 33 has a movable member 33a at one end that rotates in conjunction with the rotating member 9, and is a mechanism that receives a rotational driving force from the electric motor 8a and outputs it as a linear reciprocating motion at the other end. The movable member 33a is a metal plate having a positioning hole 33b and a driving force transmission hole 33c, which are through holes. Here, the relative positions of the positioning hole 33b and the driving force transmission hole 33c in the front-rear and up-down directions are the same as the relative positions of the positioning hole 91 of the rotating member 9 and the driving force transmission protrusion 93 in the front-rear and up-down directions.

[0051] The link rod 34 is a rod-, tubular- or plate-shaped long member having one end mechanically connected to the other end of the first link mechanism 33 and the other end mechanically connected to the second link mechanism 36, and is a member that moves linearly back and forth along the longitudinal direction in conjunction with the other end of the first link mechanism 33. The cylindrical handle 35 is a long cylindrical member that is provided between the first link mechanism 33 and the second link mechanism 36 and covers the outer periphery of the link rod 34. The second link mechanism 36 is a mechanism that converts the linear reciprocating motion of the link rod 34 into rotational motion and rotates the movable blade 32.

[0052] The fixing member 37 is a metal plate having a positioning hole 37a, which is a through hole, and a rotation prevention hole 37b. The relative positions of the positioning hole 37a and the rotation prevention hole 37b in the front-rear and up-down directions are the same as the relative positions of the positioning hole 25 and the rotation prevention hole 26 of the mounting part 23 in the front-rear and up-down directions.

[0053] The fixed member 37, the movable member 33a, and the rotating member 9 are stacked on top of each other and detachably attached to the positioning holes 25 of the mounting portion 23 (metal plate 23a). Here, the fixed member 37, the movable member 33a, and the rotating member 9 are stacked in this order from the side closest to the mounting portion 23.

[0054] In addition, the positioning hole 37a of the fixed member 37, the positioning hole 33b of the movable member 33a, and the positioning hole 91 of the rotating member 9 are attached to the positioning hole 25 so that their respective central axes overlap (are coaxial) and also overlap with the central axis of the positioning hole 25.

[0055] Specifically, the first fixing bolt 10 is inserted from the outside (right side) of the rotating member 9 through the positioning hole 91 of the rotating member 9, the positioning hole 33b of the movable member 33a, the positioning hole 37a of the fixed member 37, and the positioning hole 25 of the mounting portion 23, and the screwing portion 10a of the first fixing bolt 10 is screwed into the nut 11 on the opposite side (left side) of the positioning hole 25 (metal plate 23a), thereby attaching the fixed member 37, the movable member 33a, and the rotating member 9 to the mounting portion 23 (positioning hole 25). In this way, the fixed member 37, the movable member 33a, and the rotating member 9 are attached to the mounting portion 23 (main body portion 2) with reference to the positioning hole 25. In other words, the positioning hole 25 also functions as a positioning portion that positions the cutting unit 3 with respect to the main body portion 2.

[0056] At this time, the second fixing bolt 12 is inserted from the left side of the metal plate 23a so as to pass through the anti-rotation member 13 and the anti-rotation hole 26, and on the opposite side of the metal plate 23a, i.e., the side where the fixing member 37 is attached, the second fixing bolt 12 is screwed into the anti-rotation hole 37b of the fixing member 37. As a result, the fixing member 37 is fixed so as not to move relative to the attachment part 23 (metal plate 23a) or the main body part 2.

[0057] With the fixed member 37, the movable member 33a, and the rotating member 9 attached to the mounting portion 23, a second type of cover 50B (50) for the cutting unit 3B for pole pruners is attached to cover the fixed member 37, the movable member 33a, the rotating member 9, and the mounting portion 23. The second type of cover 50B is fixed to the cover fixing screw hole 24 by a fastening member 51.

[0058] In addition, when the fixed member 37, the movable member 33a, and the rotating member 9 are attached to the attachment portion 23, the movable member 33a and the rotating member 9 can rotate about the central axis of the positioning hole 25 (positioning holes 33b and 91). At this time, the driving force transmission projection 93 of the rotating member 9 is fitted into the driving force transmission hole 33c of the movable member 33a. Therefore, when the rotating member 9 rotates by receiving the rotational driving force of the electric motor 8a, the movable member 33a rotates in conjunction with the rotating member 9 (co-rotates). That is, by driving the electric motor 8a, the movable member 33a is rotated, and accordingly, a rotational driving force is applied to the movable blade 32 via the first link mechanism 33, the link rod 34, and the second link mechanism 36, so that the movable blade 32 can be opened and closed relative to the fixed blade 31, and the movable blade cutting portion 32a of the movable blade 32 and the fixed blade cutting portion 31a of the fixed blade 31 function as scissors to cut the object to be cut, such as a branch. The movable blade 32 is indirectly connected via a movable member (movable member 33a, first link mechanism 33, link rod 34, and second link mechanism 36) different from the movable blade 32.

[0059] According to the present invention, either the first type of cutting unit 3A or the second type of cutting unit 3B can be selectively attached to the attachment portion. That is, different types of cutting units can be replaced and used according to the purpose of using the electric pruning shears 1. Therefore, the electric pruning shears 1 can be used for multiple purposes (multiple types of objects to be cut), improving convenience.

[0060] Furthermore, according to the present invention, the cutting unit 3 can be attached to the main body 2 easily and with high accuracy by the positioning hole 25 which functions as a positioning portion for positioning the cutting unit 3 relative to the main body 2.

[0061] Furthermore, according to the present invention, since the cutting unit 3 is configured to be attached to the positioning hole 25, the movable blade 32 or the movable member 33a can be rotated about the central axis of the positioning hole 25, which is the position that most easily ensures the attachment accuracy, and the cutting unit 3 can be stably operated. Also, the movable blade 32 or the movable member 33a can be stably operated without being damaged.

[0062] Furthermore, according to the present invention, the positioning hole 25 is provided with a pivotable member 9, as well as a first fixing bolt 10 and a nut 11 which rotatably fasten the movable blade 32 or the movable member 33a, so that the cutting unit 3 can be easily attached to the main body 2 by simply aligning the position of the cutting unit 3 and fastening the first fixing bolt 10 and the nut 11.

[0063] Furthermore, according to the present invention, the rotating member 9 and the cutting unit 3 are detachable from the same surface (the right surface in the above embodiment) of the main body 2, so that when replacing a different type of cutting unit, the work can be easily performed without changing the orientation of the electric pruning shears 1. For example, the electric pruning shears 1 of the present invention can be used for two purposes: as hand shears and as pole shears.

[0064] The electric scissors of this invention correspond to the electric pruning shears 1 of the above embodiment, and similarly, the main body corresponds to the main body 2, the movable blade corresponds to the movable blade 32, the cutting unit corresponds to the cutting unit 3, the mounting portion corresponds to the mounting portion 23, the drive portion corresponds to the electric motor 8a, the power supply portion corresponds to the power supply portion 6, the transmission member corresponds to the rotating member 9, the first type of cutting unit corresponds to the first type of cutting unit 3A, the second type of cutting unit corresponds to the second type of cutting unit 3B, the positioning portion corresponds to the positioning hole 25, the positioning hole corresponds to the positioning hole 25, and the fastening member corresponds to the first fixing bolt 10 and the nut 11, but this invention is not limited to this embodiment and can be made into various other embodiments. [Industrial Applicability]

[0065] The present invention can be utilized in the electric scissors industry, such as for cutting the branches, leaves, stems, etc. of plants. [Explanation of symbols]

[0066] 1. Electric pruning shears 2…Main body 21…Housing 22…Grip section 23…Mounting part 24…Cover 3…Cutting unit 3A…First type of cutting unit 3B: Second type cutting unit 4...Operation unit 5...Operating mechanism 6...Power supply section 7...Control section 8a…Electric motor 9... Rotating member (transmission member)

Claims

1. An electric shears for cutting plants, A main body portion, A cutting unit having two blades, at least one of which is a movable blade; a mounting portion formed on the main body portion for mounting the cutting unit; A drive unit for applying a drive force to the movable blade; A power supply unit that supplies power to the drive unit; a transmission member interposed between the drive section and the cutting unit for transmitting the driving force to the movable blade, the cutting unit includes a first type of cutting unit that directly connects the movable blade to the transmission member, and a second type of cutting unit that indirectly connects the movable blade to the transmission member via a movable member different from the movable blade, The cutting unit is characterized in that either the first type or the second type is selectively attached to the attachment portion. Electric scissors.

2. The cutting unit further includes a positioning portion provided on the mounting portion for positioning the cutting unit relative to the main body portion. The electric scissors according to claim 1.

3. The positioning portion has a positioning hole provided in the mounting portion, The transmission member and the movable member are configured to be attached to the positioning holes. The electric scissors according to claim 2.

4. The movable member is further provided with a fastening member for rotatably fastening the transmission member and the movable member to the positioning hole. The electric scissors according to claim 3.

5. The transmission member and the cutting unit are detachably attached to the same surface of the main body.

5. The electric scissors according to claim 1.

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