pruning shears

Abstract

The objective is to provide pruning shears that allow for easy adjustment of the maximum blade opening angle. [Solution] The present invention solves the above problems and provides pruning shears X comprising a blade body 1, a blade receiving part 2, a gripping handle 4, and a link mechanism L that can swing in conjunction with the blade body 1, the blade receiving part 2, and the gripping handle 4, wherein the link mechanism L includes a rotating shaft part 5 that is rotatably connected to the gripping handle 4, and an adjustment part 7 is provided that can adjust the rotation range of the rotating shaft part 5.

Description

Technical Field

[0001] The present invention relates to pruning shears that can be used according to the user's hand size.

Background Art

[0002] In pruning work for appropriately cutting and trimming tree branches and the like, safe and easy-to-use shears are required. In particular, such pruning shears are expected to be used in high places and narrow spaces and to easily cut hard branches. Therefore, it is preferable that they have a configuration that allows cutting with only one hand operation.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The pruning shears described in Patent Document 1 include a link mechanism including a connection portion between the blade and the handle, and enable a so-called "cutting" operation in which one blade moves while shifting in the direction of the handle while closing with the operation of closing the blade. Further, a spring is provided in these pruning shears, and the closed blade can be easily opened using the restoring force without the user applying force to the hand. However, there are individual differences in the size of the user's hand, and there is a problem that the pruning shears may fall off the user's hand and drop when the size of the opening of the blade by the spring does not match the size of the user's hand.

[0005] In view of the above problems, an object of the present invention is to provide pruning shears that can easily adjust the magnitude of the maximum opening angle of the blade.

Means for Solving the Problems

[0006] The present invention, which solves the above problems, is a pruning shear comprising a blade body, a blade receiving portion, a gripping handle, and a link mechanism that can swing in conjunction with the blade body, the blade receiving portion, and the gripping handle, wherein the link mechanism includes a rotating shaft portion that is rotatably connected to the gripping handle, and is provided with an adjustment portion that can adjust the range of rotation of the rotating shaft portion. This configuration allows for easy adjustment of the maximum blade opening angle.

[0007] The present invention, which solves the above problems, is a pruning shear comprising a first blade, a second blade, a gripping handle, and a link mechanism that can swing in conjunction with the first blade, the second blade, and the gripping handle, wherein the link mechanism includes a rotating shaft that is rotatably connected to the gripping handle, and is provided with an adjustment part that can adjust the range of rotation of the rotating shaft. This configuration allows for easy adjustment of the maximum blade opening angle.

[0008] In a preferred embodiment of the present invention, the link mechanism includes an extension portion provided to extend the blade body or the second blade body toward the grip handle, and has a coil spring connected to the grip handle in the direction of extension of the extension portion. This configuration provides a restoring force to the link mechanism, allowing for easy handling of the scissors in conjunction with gripping operations.

[0009] In a preferred embodiment of the present invention, the adjustment unit has a contact member that can contact the rotating rod, and the rotation range angle of the rotating rod is determined by the contracted state in which the coil spring connected to the grip handle is contracted and the contact state in which the rotating rod contacts the contact member, and the contact member can change the range of interference with the rotating rod. This configuration allows for adjustment of the blade's range of motion with a simple structure.

[0010] In a preferred embodiment of the present invention, the contact member has a cross-section in which the distance from the center to the outer edge varies with angle. This configuration allows the adjustment unit to be manufactured at a low cost.

[0011] In a preferred embodiment of the present invention, the gripping handle covers the axis of the pivot shaft included in the link mechanism. This configuration makes it less likely for the user's fingers to get caught in the sliding motion of the components around the pivot axis, allowing for safer pruning work.

[0012] In a preferred embodiment of the present invention, the blade body and the blade receiving portion, or the first blade body and the second blade body, are further provided with a fastener capable of holding them in a closed state. This configuration allows for safe storage of pruning shears when not in use. [Effects of the Invention]

[0013] The present invention, which solves the above problems, provides pruning shears that can easily adjust the size of the maximum blade opening angle. [Brief explanation of the drawing]

[0014] [Figure 1] This is a front view showing the closed state of pruning shears according to each embodiment of the present invention. [Figure 2] This is a perspective view showing the closed state of pruning shears according to the first embodiment of the present invention. [Figure 3] This is a perspective view showing the closed state of pruning shears according to a second embodiment of the present invention. [Figure 4] This is a front view showing a closed state of pruning shears according to the first embodiment of the present invention. [Figure 5] This is a front view showing the open state of pruning shears according to the first embodiment of the present invention. [Figure 6] This is a partially enlarged view showing the area near the adjustment part of pruning shears according to the first embodiment of the present invention. [Figure 7] This is a front view showing another open state of pruning shears according to the first embodiment of the present invention. [Figure 8] This is a partially enlarged view showing the area near the adjustment part of pruning shears according to the first embodiment of the present invention. [Modes for carrying out the invention]

[0015] Hereinafter, with reference to the drawings, the pruning shears X according to each embodiment of the present invention will be described. The description will be detailed in the order of the configuration of the embodiment, the method of implementation, and other examples. In the following description, the pruning shears X according to the first embodiment of the present invention are referred to as anvil-type pruning shears X1, and the pruning shears X according to the second embodiment of the present invention are referred to as bypass-type pruning shears X2. Note that each of the following embodiments is an example of the present invention, and the present invention is not limited to the following embodiments.

[0016] ≪Embodiment≫ As shown in Fig. 1(a), the anvil-type pruning shears X1 include a blade body 1, a blade receiving portion 2, an extended portion 3, a gripping handle 4, a rotating lever portion 5, a driving portion 6, an adjusting portion 7, and a stopper 8. On the other hand, as shown in Fig. 1(b), the bypass-type pruning shears X2 include a blade body 1 including a first blade body 11 and a second blade body 12, an extended portion 3, a gripping handle 4, a rotating lever portion 5, a driving portion 6, an adjusting portion 7, and a stopper 8. The difference between the two embodiments is that the blade body 1 and the blade receiving portion 2 in the anvil-type pruning shears X1 are the first blade body 11 and the second blade body 12 in the bypass-type pruning shears X2. The following description is based on the anvil-type pruning shears X1 except for this difference. In the following description, the blade body 1 and the blade receiving portion 2 can be interpreted as the first blade body 11 and the second blade body 12 respectively for the description of the bypass-type pruning shears X2.

[0017] The anvil-type pruning shears X1 form a pair of cutting portions with the blade body 1 and the blade receiving portion 2, and are connected to a pair of gripping handles 4 having a first gripping handle 41 and a second gripping handle 42. In addition, the blade body 1 and the extended portion 3, and the blade receiving portion 2 and the first gripping handle 41 are integrally provided. Further, the blade receiving portion 2, the extended portion 3, the first gripping handle 41, and the rotating lever portion 5 are connected by a hinge H (rotary pair) so as to form a quadrilateral, forming a four-bar link mechanism L. Note that in the bypass-type pruning shears X2, the blade body 1 is converted into the first blade body 11, and the blade receiving portion 2 is converted into the second blade body 12, and all other configurations are the same as those of the anvil-type pruning shears X1.

[0018] In the anvil-type pruning shears X1, the blade body 1 is a flat blade-shaped member that penetrates into an object from its sharp tip and cuts the object, and the blade receiving part 2 is a receiving base that can contact and receive the entire sharp edge of the blade body 1. The blade receiving part 2 has a blade receiving base part 21 and a blade receiving main body part 22, the blade receiving base part 21 is connected to the blade body 1 and the grip handle 4 and is a member that supports the blade receiving main body part 22, and the blade receiving main body part 22 is provided covering the blade receiving base part 21 in the area facing the blade of the blade body 1 and is a member that can receive the blade of the blade body 1.

[0019] The blade support body 22 is preferably made of a material with less rigidity than the blade support base 21. This allows the blade support base 21 to maintain the overall strength of the blade support 2 while the blade support body 22 can receive the blade of the blade 1 without damaging it. Furthermore, the blade support body 22 is preferably configured such that the part corresponding to the blade 1 on the surface that receives the blade 1 is cut in a groove shape, or that the parts on both sides of it are raised with irregularities. With such a configuration, the object to be cut is held at a slight elevation, and the blade 1 reliably crosses the cross-section of the object, so that the object can be sheared without producing burrs or uncut pieces.

[0020] In the bypass-type pruning shears X2, the first blade 11 is a flat-blade-shaped member that cuts the object by splitting it from its sharp tip, and the second blade 12 is a flat-blade-shaped (or thick-blade-shaped) member having a flat blade portion that faces the flat blade of the first blade 11. The first blade 11 and the second blade 12 slide against each other on a single plane, and shear the object on that plane.

[0021] In each embodiment of the present invention, the blade receiving portion 2 and the second blade body 12 have a curved shape with a concave central portion, while the blade body 1 and the first blade body 11 have a curved shape with a convex central portion to match the curve. With this configuration, the blade receiving portion 2 or the second blade body 12 can hold the object to be cut (such as a tree branch), and the object will not be pushed out by the closing motion of the blade body 1 or the first blade body 11, allowing for stable cutting.

[0022] The extension 3 is a flat or beam-shaped member that extends the blade body 1 or the first blade body 11 toward the grip handle 4, and is located between the pair of grip handles 4, forming part of the link mechanism L that operates the blade body 1 or the first blade body 11. The extension 3 is provided integrally with the blade body 1 or the first blade body 11, and one end of it is rotatably connected to the first grip handle 41 and the other end to the rotating rod 5 by hinges H.

[0023] The gripping handle 4 is a rod-shaped member that the user grips with their hand when using the pruning shears X, and has a first gripping handle 41 and a second gripping handle 42. The first gripping handle 41 is provided integrally with or fixedly connected to the blade receiving part 2 or the second blade body 12, and the second gripping handle 42 is provided rotatably connected to the blade receiving part 2 or the second blade body 12.

[0024] The first gripping handle 41 and the second gripping handle 42 are preferably configured such that the outer surface that is gripped by the user's hand is curved in an arc along its length, and the cross-section is also preferably a flattened shape with a curved outline. This configuration makes it easier for the user to grip the gripping handle 4 and prevents the pruning shears X from falling during use.

[0025] The rotating rod portion 5 is a flat or rod-shaped member that constitutes the link mechanism L, and one end of it is rotatably connected to the second gripping handle 42, and the other end is connected to the tip of the extension portion 3.

[0026] The link mechanism L is a general type of mechanism that connects multiple links in pairs to achieve a predetermined action. In the case of pruning shears X, it is a quadrilateral-shaped four-bar link mechanism that can swing in conjunction with the blade body 1, the blade receiving part 2, and the gripping handle 4 (or the first blade body 11, the second blade body 12, and the gripping handle 4). This provides relative translational and / or rotational motion between the links, allowing for the simultaneous opening and closing of the blades, cutting motion, and change of the blade's range of motion, as is typical with pruning shears.

[0027] The linkage mechanism L includes a first hinge H1, a second hinge H2, a third hinge H3, a fourth hinge H4, a fixed link L0, a drive link L1, a relay link L2, and an operating link L3. In the following description, the axial joint (rotational pair) connecting the second gripping handle 42 and the rotating rod 5 is referred to as the first hinge H1, the axial joint connecting the rotating rod 5 and the extension 3 is referred to as the second hinge H2, the axial joint connecting the extension 3 and the blade receiving part 2 (or second blade body 12) is referred to as the third hinge H3, and the axial joint connecting the blade receiving part 2 (or second blade body 12) and the second gripping handle 42 is referred to as the fourth hinge H4. Furthermore, the section between the first hinge H1 and the second hinge H2 (i.e., the rotating shaft section 5) is designated as the drive link L1, the section between the second hinge H2 and the third hinge H3 (i.e., the extension section 3) as the relay link L2, the section between the third hinge H3 and the fourth hinge H4 (i.e., the blade receiving section 2 or part of the second blade body 12) as the operating link L3, and the section between the fourth hinge H4 and the first hinge H1 (i.e., part of the second gripping handle 42) as the fixed link L0. In addition, since the maximum blade opening angle RM is located outside the link mechanism L, a relay link extension section L21 is added by extending the relay link L2 toward the third hinge H3, and the angle between the relay link extension section L21 and the operating link L3 is designated as the opening angle R. The arrangement of each link is shown by dashed lines in Figures 4, 5, and 7. The illustrations here show an anvil-type pruning shear X1, but the link mechanism L is the same for the bypass-type pruning shear X2.

[0028] The drive unit 6 is a drive mechanism (which may be interpreted as a drive device included in the link mechanism L) capable of driving the link mechanism L in a certain direction, and includes a drive body mounting part 61 and a coil spring 62.

[0029] The drive unit mounting portion 61 is a member that allows both ends of the coil spring 62 to be attached to other members of the pruning shears X. In each embodiment, one is provided near the second hinge H2 and the other is provided on the second gripping handle 42. In particular, the drive unit mounting portion 61 provided near the second hinge H2 is provided in the extension direction of the extension portion 3, as shown in Figures 1(a), 1(b), 5, and 7. The drive unit mounting portion 61 provided on the second gripping handle 42 is provided at a position further along the extension direction of the extension portion 3, and the coil spring 62 is provided so as to connect the two drive unit mounting portions 61.

[0030] The coil spring 62 is a type of general spring made by spirally winding a metal wire with approximately constant elasticity, and is positioned so that its direction of expansion and contraction is in the direction of extension of the extension portion 3. The coil spring 62 is attached to the drive body mounting portion 61 in a more contracted state than its natural state, and uses its own extension force (restoring force) to actuate the link mechanism L in the direction in which the blades of the pruning shears X open. With this configuration, the user's grip strength is used to close the blades of the pruning shears X, and the restoring force of the coil spring 62 is used to open the blades, so that the grip handle 4 is always pressed against the user's hand, allowing for easy and safe pruning work.

[0031] In the configuration shown in the drawing, the diameter of the spiral of the coil spring 62 is approximately constant, but it is preferable that the diameter of the spiral in the center is larger than the diameter of the spirals at both ends in the direction of expansion and contraction. This configuration keeps the expansion and contraction direction of the coil spring 62 constant and prevents the coil spring 62 from bending in an unexpected direction when using the pruning shears X.

[0032] The adjustment section 7 is a mechanism that can adjust the range of rotation of the rotating shaft 5 relative to the first hinge H1, and includes an operating section 71 and a contact member 72. Furthermore, as shown in Figures 1(a), 1(b), 5, and 7, the adjustment section 7 is provided on the second grip handle 42, particularly between the first hinge H1 and the fourth hinge H4. With this configuration, the position of the adjustment section 7, especially the operating section 71, is close to the position of the user's fingers and the position of the rotating shaft 5, and the adjustment section 7 can be operated with a simple configuration and easy operation that does not require changing the grip of the pruning shears X.

[0033] The operating section 71 is a rod-shaped member provided on the outer surface of the second grip handle 42, and allows the position or orientation (direction) of the contact member 72 to be changed. The contact member 72 is a columnar member provided through the second grip handle 42 approximately parallel to the hinge H, and is fixedly connected to the operating section 71 at one or both ends. The contact member 72 can also contact the rotating rod 5, and by changing its contact position, the range of motion of the link mechanism L is changed. With this configuration, the range of motion of the blade body 1 and blade receiving section 2 (or the first blade body 11 and the second blade body 12) which are linked to the link mechanism L can be adjusted, and the size of the maximum opening angle RM can be easily adjusted.

[0034] In the pruning shears X according to this embodiment, the operating part 71 is provided so as to be rotatable by a predetermined angle around a contact member 72 which has a cylindrical shape as its pivot axis. The user rotates the contact member 72 by rotating the operating part 71. With this configuration, the adjustment part 7 can be operated with simple operation. However, the operating part 71 can only be operated when the blade body 1 and the blade receiving part 2 (or the first blade body 11 and the second blade body 12) are closed, that is, when the rotating rod part 5 is not in contact with the contact member 72. This is because when the rotating rod part 5 is in contact with the contact member 72, the restoring force of the coil spring 62 presses the rotating rod part 5 against the contact member 72, preventing the contact member 72 from rotating. As a result, even if branches or the user's fingers come into contact with the operating part 71 during pruning, the maximum opening angle RM does not change, thus preventing unintended and unnecessary strain on the user's hand.

[0035] Figures 5, 6(a), and 6(b) show the first maximum opening angle RM1, where the maximum opening angle RM between the blade body 1 and the blade receiving part 2 of the anvil-type pruning shears X1 is large, while Figures 7, 8(a), and 8(b) show the second maximum opening angle RM2, where the maximum opening angle RM between the blade body 1 and the blade receiving part 2 of the anvil-type pruning shears X1 is small. The difference between the two is the orientation of the adjustment part 7, particularly the orientation of the contact member 72. This is because the contact state between the rotating shaft 5 and the contact member 72 differs depending on the orientation of the notch 721 provided in the contact member 72.

[0036] The notch 721 is a recess formed by cutting out a portion of the substantially cylindrical contact member 72. In this portion, as shown in Figures 6(a) and 8(a), the cross-sectional shape of the contact member 72 is such that a portion of a circle is cut off by a chord. This configuration allows the adjustment unit 7 to be manufactured with a simple structure and at low cost.

[0037] The cross-sectional shape of the contact member 72 is not limited to the shape of the notch 721 shown in Figures 6(a) and 8(a). Any shape is acceptable as long as the distance from the central axis of rotation to the outer edge (the surface that can contact the rotating rod 5) in the cross-section differs depending on the angle with respect to the direction of rotation. For example, an ellipse, a track shape, or a shape combining arcs with different radii and centers can be used. A shape that can stably maintain contact with the rotating rod 5 is preferred.

[0038] In the following description, the state in which the rotating rod 5 is in contact with the contact member 72 will be referred to as the contact state. In the states shown in Figures 5, 6(a), and 6(b), the notch 721 of the contact member 72 faces in the direction from which the rotating rod 5 is rotating, and in the contact state, a part of the rotating rod 5 is fitted into the notch 721. On the other hand, in the states shown in Figures 7, 8(a), and 8(b), the notch 721 does not face the direction of the rotating rod 5, and in the contact state, the side surface of the rotating rod 5 and the side surface (curved surface) of the cylindrical portion of the contact member 72 are in contact. The two contact states described above result in a difference in the range of rotation of the rotating shaft 5. When a part of the rotating shaft 5 is fitted into the notch 721, the maximum opening angle RM between the blade body 1 and the blade receiving part 2 is large, resulting in a first maximum opening angle RM1. When the side surface of the rotating shaft 5 is in contact with the side surface of the cylindrical portion of the contact member 72, the maximum opening angle RM between the blade body 1 and the blade receiving part 2 is small, resulting in a second maximum opening angle RM2.

[0039] When considering the above operations as a whole link mechanism L, the rotation range angle of the rotating rod 5 around the first hinge H1 is determined by the contracted state shown in Figure 4 and the contact state shown in Figures 5 and 7. The contracted state is the state in which the blades of the pruning shears X are closed, as shown in Figure 4, or in other words, the state in which the coil spring 62 is most contracted. From this contracted state, the force of the coil spring 62 extending pushes the second hinge H2 toward the blade body 1, and the rotating rod 5 (drive link L1) rotates counterclockwise in the orientation shown in Figure 4. In conjunction with this, the extension part 3 and the blade body 1 (relay link L2 and relay link extension part L21, respectively) translate, and the blade receiving part 2 (operating link L3) rotates around the fourth hinge H4.

[0040] As a result of the operation of the link mechanism L described above, the opening angle R (the angle between the relay link extension L21 and the operating link L3) widens, reaching the state shown in Figure 5 or Figure 7. At this point, the interference range of the contact member 72 with the rotating rod 5 (and its rotation range angle) can be changed, thereby changing the rotation range angle of the rotating rod 5. The maximum opening angle RM takes the form of either the first maximum opening angle RM1 or the second maximum opening angle RM2, thereby changing the opening angle between the blade body 1 and the blade receiving part 2.

[0041] With the above-described configuration that allows for changing the contact state, the maximum opening angle RM between the blade body 1 and the blade receiving part 2 (or the first blade body 11 and the second blade body 12) that are spread apart by the coil spring 62 can be easily adjusted (changed), allowing the pruning shears X to be used appropriately according to the size of the user's hand, the size of the workspace for pruning, the size of the object to be cut, etc.

[0042] The stopper 8 is a wedge-shaped member provided along the grip handle 4, and is capable of holding the blade body 1 and blade receiving part 2, or the first blade body 11 and second blade body 12, in a closed state. In the pruning shears X according to this embodiment, as shown in Figures 1(a), 1(b), 2, and 3, the stopper 8 is partially embedded near the third hinge H3 of the first grip handle 41 and is rotatable by an axial joint. By rotating it in the direction of the arrow shown in Figure 4 (counterclockwise), and rotating it toward the blade body 1, it is inserted between the blade body 1 and the blade receiving part 2 (or the first blade body 11 and second blade body 12), thereby holding the blade body 1 and the blade receiving part 2, or the first blade body 11 and second blade body 12, in place so that they do not move. With this configuration, the blades of the pruning shears X can be held in a closed state with a simple configuration and easy operation, ensuring safety when not in use.

[0043] The present invention may have the following configurations. However, the following configurations are merely examples, and their presence or absence can be arbitrarily determined unless otherwise specified.

[0044] ≪Example of changes≫ The grip handle 4 is preferably configured to cover the axis of the hinge H (rotation axis) included in the link mechanism L. In the pruning shears X according to this embodiment, as shown in Figures 2 and 3, the first grip handle 41 covers the axis of the third hinge H3, and the second grip handle 42 covers the axes of the first hinge H1 and the fourth hinge H4. With this configuration, when using the pruning shears X, the user's fingers are less likely to get caught in the sliding of each hinge H and the surrounding members, allowing pruning work to be performed safely.

[0045] The following describes in detail the method of carrying out the present invention with reference to the drawings. Furthermore, the method of carrying out the invention described below is merely an example, and is not limited to this method; the order of the steps may also be changed.

[0046] ≪Implementation Method≫ The user first raises the stopper 8 of the pruning shears X, allowing the blade body 1 and blade receiving part 2 (or the first blade body 11 and second blade body 12) to open and close, and then grasps the gripping handle 4. At this time, it is preferable to place the thumb on the first gripping handle 41 and the index finger on the second gripping handle 42. This is the same regardless of the user's dominant hand. This allows the blade receiving part 2 or the second blade body 12 to be positioned vertically below the object when cutting it with the pruning shears X, enabling safe and reliable pruning work.

[0047] When the user adjusts the maximum opening angle RM between the blade body 1 and the blade receiving part 2 (or the first blade body 11 and the second blade body 12), the user closes the blade body 1 and the blade receiving part 2 (or the first blade body 11 and the second blade body 12) and operates the operating part 71. This operation determines either the first maximum opening angle RM1 or the second maximum opening angle RM2 in the contact state, and adjusts the range of motion of the pruning shears X according to the size of the user's hand and the size of the workspace. [Explanation of Symbols]

[0048] X Pruning shears X1 Anvil-type pruning shears X2 Bypass-type pruning shears 1 blade 11 First blade 12 Second blade 2 Blade receiving section 21 Blade holder base 22 Blade holder main body 3 Extension part 4 Gripping handle 41 First grip handle 42 Second grip handle 5. Rotating shaft 6 Drive Unit 61 Drive unit mounting section 62 Coil springs 7 Adjustment part 71 Operation section 72 Contact Member 721 Notch 8 Fasteners A Rotating arc D Interference range D1 First Interference Range D2 Second Interference Range E Contracted position H hinge H1 First Hinge H2 Second Hinge H3 Third Hinge H4 Fourth Hinge L-link mechanism L0 Permalink L1 drive link L2 relay link L21 Relay Link Extension L3 Operating Link R opening angle RM Maximum opening angle RM1 First maximum opening angle RM2 Second Maximum Opening Angle S Drive link rotation range S1 Drive link first rotation range S2 Drive link second rotation range

Claims

1. Pruning shears comprising a blade body, a blade receiving portion, a gripping handle, and a link mechanism that can swing in conjunction with the blade body, the blade receiving portion, and the gripping handle, The link mechanism includes a rotating rod that is rotatably connected to the gripping handle. Pruning shears, wherein an adjustment mechanism is provided that allows adjustment of the rotation range of the aforementioned rotating shaft.

2. Pruning shears comprising a first blade, a second blade, a gripping handle, and a link mechanism that can swing in conjunction with the first blade, the second blade, and the gripping handle, The link mechanism includes a rotating rod that is rotatably connected to the gripping handle. Pruning shears, wherein an adjustment mechanism is provided that allows adjustment of the rotation range of the aforementioned rotating shaft.

3. The link mechanism includes an extension portion provided to extend the blade body or the second blade body toward the grip handle side, In the extension direction of the extension portion, a coil spring connected to the grip handle is provided. Pruning shears according to either claim 1 or 2.

4. The adjustment unit has a contact member that can contact the rotating rod, The rotation range angle of the rotating shaft is determined by the contracted state in which the coil spring connected to the grip handle is contracted and the contact state in which the rotating shaft is in contact with the contact member. The contact member is capable of changing the interference range with the rotating rod. Pruning shears according to either claim 1 or 2.

5. In the cross-section of the aforementioned contact member, the distance from the center to the outer edge differs depending on the angle. Pruning shears according to any of claim 4.

6. The gripping handle covers the axis of the pivot shaft included in the link mechanism. Pruning shears according to either claim 1 or 2.

7. The blade body and the blade receiving portion, or the first blade body and the second blade body, are further provided with a fastener capable of holding them in a closed state. Pruning shears according to either claim 1 or 2.

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