JP2021153706A - Assist force applicator, scissor, shear tool - Google Patents

Abstract

To provide an assist force applicator for scissor/shear tool which has a simple structure and a light weight, and realize power assist, a scissor, and a shear tool.SOLUTION: A scissor for hairdressing, beauty or other purpose comprises: a scissor body in which a first scissor half body 1 having a movable blade 1a and a thumb ring 1c, and a second scissor half body 2 having a static blade 2a and a third-finger ring 2c are rotatably connected at a pivot part 3, and the movable blade 1a and the static blade 2a form a cutting plane; and a restoring force application part 41, as an assist force application part 4, such as superelastic alloy wire (spring) or the like at a position where elastically deformation is caused when the scissor opens and power to return to the original (restoring force) acts when the scissor closes. Further, a shear tool, and an assist force applicator for scissor/shear tool are provided.SELECTED DRAWING: Figure 1

Description

The present invention relates to an assist force applying tool, scissors, and a shearing tool, and more particularly to a spring-type assist force applying tool for the scissors / shearing tool and a scissors / shearing tool with a spring-type power assist.

Conventionally, the scissors with power assist include the following, for example.
Patent Document 1 describes "scissors with an electric assist function, which is a method of shearing by the combined force of a shearing force due to a grip force and a shearing force due to a motor power, and has excellent cutting workability" (summary).
Patent Document 2 includes "scissors for barber or beauty, scissors body 100 and assist means 40", and "reduces the burden on fingers, wrists and arms, prevents tendonitis, and develops tendonitis. "Scissors that can be used even by a cutting engineer" (summary) is described.
In Patent Document 3, the assist force is calculated based on "when the scissors 2 changes from the open state to the closed state, the force measured by the force sensor 5 and the opening angle θ measured by the angle sensor 4". The power assist is equipped with a "control unit 6" that commands the assist force to the actuator, and "can reduce the load on the user's fingers while satisfying the user's feeling of use" (summary). Functional scissors are listed.

Japanese Unexamined Patent Publication No. 2014-188349 JP-A-2018-139790 Japanese Unexamined Patent Publication No. 2019-8408

Generally, barber and beauty scissors (hereinafter referred to as barber scissors) are used with a relatively light force, but they can also be used to open and close quickly, such as 2 to 3 times per second. Also, as for the working posture, the arms are extended and one blade is supported by four fingers, and the cutting is performed only by the movement of the thumb. The burden on the arm is also relatively heavy, for example, the accumulation of daily work fatigue over decades may cause some people to develop tendonitis in severe cases.
In the conventional technique as described above, in order to solve these problems, mechanical parts and mounting parts that impart an assist force are provided. However, in such a conventional technique, it is assumed that the weight is added by using an actuator or the like, which puts a burden on the hand or arm. Therefore, it is desired to reduce the weight so that the hand or arm is not burdened. .. Further, in the prior art, since the electric system configuration is used, it is expected that the structure becomes complicated and relatively expensive.

In view of the above points, it is an object of the present invention to provide an assist force imparting tool, scissors, and a shearing tool for scissors and shearing tools, which realize power assist having a simple structure and light weight.

According to the first solution of the present invention
In a scissors or shearing tool provided with a first scissors half body, a second scissors half body, a shaft support portion for rotatably connecting the first scissors half body and the second scissors half body, the first scissors half body. An assist force applying unit that applies an assist force to cutting by the body and the second scissors semifield.
A restoring force imparting portion having one end and the other end,
A support fixing portion that supports one end side of the restoring force applying portion and is fixed to the shaft support portion or the first scissors semifield.
It has a sliding portion that slidably supports the other end side of the restoring force applying portion and is fixed to the second scissors semifield.
The restoring force applying portion is elastically deformed when the handles of the first scissors half body and the second scissors half body are opened, and a force that tries to return to the original state acts when the handles are closed. A force-imparting tool is provided.

According to the second solution of the present invention
It ’s a pair of scissors
The first scissors semifield and
The second scissors semifield and
A shaft support that rotatably connects the first scissors half body and the second scissors half body, and
An assist force applying unit that imparts an assist force to cutting by the first scissors semifield and the second scissors semifield,
With
The assist force applying unit is
A restoring force imparting portion having one end and the other end,
A support fixing portion that supports one end side of the restoring force applying portion and is fixed to the shaft support portion or the first scissors semifield.
It has a sliding portion that slidably supports the other end side of the restoring force applying portion and is fixed to the second scissors semifield.
The restoring force applying portion is elastically deformed when the handles of the first scissors half body and the second scissors half body are opened, and a force to return to the original state acts when the handles are closed. Is provided.

According to the third solution of the present invention
Shearing tool
The first shear tool semifield and
Second shear tool semifield and
A shaft support that rotatably connects the first shear tool half body and the second shear tool half body, and
An assist force applying portion that applies an assist force to cutting by the first shear tool half body and the second shear tool half body,
With
The assist force applying unit is
A restoring force imparting portion having one end and the other end,
A support fixing portion that supports one end side of the restoring force applying portion and is fixed to the shaft support portion or the first shear tool half body.
It has a sliding portion that slidably supports the other end side of the restoring force applying portion and is fixed to the second shear tool half body.
The restoring force applying portion is elastically deformed when the handle of the first shearing tool half body and the second shearing tool half body is opened, and a force trying to return to the original state acts when the handle is closed. , Shearing tools are provided.

As described above, the present invention can provide an assist force imparting tool, scissors, and a shearing tool for scissors and shearing tools, which realize power assist having a simple structure and light weight.

(A) A block diagram (exploded view) of the scissors with power assist, and (B) a cross-sectional view centered on the shaft branch 3. Explanatory drawing of opening and closing operation of scissors. Explanatory drawing about the property of a superelastic alloy. The block diagram about various shapes of a wire 41. Explanatory drawing about mounting angle of wire 41 and reaction force (restoring force) of spring. Explanatory drawing about mounting position of wire 41 and reaction force (restoring force) of spring. Explanatory drawing about the mounting position of the (superelastic alloy) wire 41 on the support side with respect to the scissors and the reaction force (restoring force) of the spring. Explanatory drawing about the mounting position of the (superelastic alloy) wire 41 on the free end side with respect to the scissors and the reaction force (restoring force) of the spring. Explanatory drawing of modification (1) and (2) of support fixing part 42. Configuration diagram of the set screw method. Configuration diagram of the screw method. Configuration diagram of the pin method. Configuration diagram of the claw method. The block diagram of the magnet system. The block diagram of the stranded wire system. Configuration diagram of the link method. The block diagram of the roller system. Explanatory drawing about the attachment method of a wire (spring).

A. Overview

As an example, in the case of right-handed scissors, barber and beauty scissors usually put the ring finger in the ring of the handle of the scissors and support the scissors with the remaining three fingers except the thumb. This keeps one of the scissors halves stationary. The blade of this scissors semifield is called a static blade, while the thumb is inserted into the ring of the other handle of the other scissors semifield, and by moving this finger, the scissors are operated and the hair is cut. The blade of this scissors semifield is called a moving blade.
In the present invention and / or the present embodiment, for example, a wire such as a superelastic alloy wire is cantilevered and fixed to the second scissors semifield (static blade) side, and the opposite side of the wire is the first scissors semifield (static blade). Pass it through the hole of the sliding part attached to the thumb ring on the moving blade) side. By opening the scissors, the wire is elastically deformed, and in the direction of closing the scissors, a force (restoring force) that causes the wire to return to its original position acts to reduce the operating force of the moving blade. That is, it is power assisted.

According to the present invention and / or the present embodiment, for example, a first scissors half body having a moving blade portion and a thumb ring and a second scissors half body having a static blade portion and a medicine finger ring rotate at a shaft support portion. The scissors body, which is freely connected and the moving and static blades form a cut surface, and the force that elastically deforms when the scissors open and returns to their original state when the scissors close (restoration). It is possible to provide scissors for barber or beauty, scissors for other purposes, and shearing tools provided with a restoring force applying portion such as a superelastic alloy wire (spring) at a position where force) acts.
Further, according to the present invention and / or the present embodiment, for example, an assist force imparting tool having the same configuration as such an assist force applying portion and which can be externally attached to existing scissors or a shearing tool is provided. be able to.

According to the present invention and / or the present embodiment, for example, there are the following special effects.
1) When opening the scissors with no load, the force is accumulated in the restoring force applying part, and when the scissors are closed and cut, the accumulated force is released and the force of the arm and finger is assisted to the arm and finger. It is possible to realize scissors that reduce the burden on the user and prevent the occurrence of obstacles.
2) Work even for barbers, beauticians, gardeners, people with disabilities, children, the elderly, etc. (hereinafter, may be referred to as barbers, etc.) who cannot use or have difficulty using ordinary scissors. Can provide scissors that can be used.
3) The mechanical parts (mounting parts) of the assist force applying means can be reduced in weight, the structure can be simplified, and the cost can be reduced.
4) Barbers, etc. can prevent the possibility of disorders such as tendonitis, which may be unavoidable professionally by some people, or they already have disorders and cannot use ordinary scissors / shearing tools. It can be expected that difficult barbers will be able to return to work or use it.
5) Mechanical parts (mounting parts) that give power assist can be additionally modified and attached to existing scissors and shearing tools, so the financial burden on barbers, etc. is small, and they are familiar or desired. Scissors and shearing tools can be used.
6) The force required to open the scissors widely can be reduced as compared with the spring mounting mechanism that is proportional to the opening angle of the scissors.
7) Furthermore, by using a superelastic alloy wire (spring), the reaction force at the maximum opening angle can be further reduced.

Hereinafter, the present invention and / or the present embodiment will be described as an example mainly applied to shears for barber / beauty, but the present invention is not limited to this, and appropriate material processing for gardening, metal processing / woodworking, plastics, etc. It can be applied to scissors / shearing tools for cutting, and scissors / shearing tools (including nippers) that cut objects of appropriate shape such as wire rods and plate materials. Further, the present invention and / or the present embodiment can also be applied to scissors / shearing tools provided with double-edged blades in which there is no distinction between a moving blade and a static blade.

B. Scissors / shearing tools with power assist, assisting force imparting tools for scissors / shearing tools

FIG. 1 (A) shows a configuration diagram (exploded view) of the scissors with power assist, and FIG. 1 (B) shows a cross-sectional view centered on the shaft support portion 3. This embodiment is, as an example, a configuration example of power assist scissors using a superelastic alloy wire.
FIG. 2 shows an explanatory diagram of the opening and closing operation of the scissors.

The scissors of the present embodiment include a first scissors half body 1, a second scissors half body 2, a shaft support portion 3, and an assist force applying portion 4.

The first scissors semifield 1 has a moving blade 1a, a handle 1b (handle), and a thumb ring 1c, and a hit point 11 is attached to the thumb ring 1c. The second scissors semifield 2 includes a static blade 2a, a handle 2b (handle), and a ring finger ring 2c. The shaft support portion 3 has a base screw and rotatably connects the first scissors semifield 1 and the second scissors semifield 2. The assist force applying unit 4 (assist force applying tool) applies an assist force to the cutting by the cutting surface formed by the moving blade 1a and the static blade 2a.
The assist force applying portion 4 supports a wire (restoring force applying portion) 41 such as a superelastic alloy wire and one end side of the wire 41 on the mounting portion 46 to form a shaft support portion 3 or a second scissors half body 2. A support fixing portion 42 fixed by a fixing screw 44 and a free end side sliding portion 43 for slidably attaching the other end side of the wire 41 to the hit point 11 of the first scissors semifield 1 are provided for further protection. A cap 45 can be provided. The wire 41 elastically deforms when the scissors (blade or handle) opens, and exerts a force to return to the original state when the scissors (blade or handle) closes.

A support fixing portion 42 that cantilevers and supports a wire 41 such as a superelastic alloy wire is attached near the rotation axis of the shaft support 3 on the second scissors semifield 2 (static blade 2a) side, and the opposite wire free end side is attached. By passing it through the hole of the free end side sliding portion 43 attached to the thumb ring 1c on the first scissors semifield 1 (moving blade 1a) side, the operation of opening the scissors while elastically deforming the wire 41 without restraining it can be performed. can. In the operation of closing the scissors, a force (restoring force) for the wire 41 to return to its original position acts to reduce the operating force of the moving blade 1a. That is, it is power assisted.
The scissors can be opened by changing the fixing position and fixing angle for cantilevering and supporting the wire 41 such as the superelastic alloy wire on the second scissors semifield 2 (static blade 2a) side by the support fixing portion 42 (mounting portion 46). Since the amount of elastic deformation with an angle can be changed, the power assist force can be changed arbitrarily. Further, the power assist force can be arbitrarily changed by changing the wire diameter, shape, etc. of the wire 41 such as the superelastic alloy wire.
The sliding portion 43 with which the free end wire 41 located on the first scissors semifield 1 (moving blade 1a) side comes into contact is, for example, a resin having low frictional resistance to the wire 41 (Teflon (registered trademark), Luron, etc.). It is even better to use or ceramics.

By separating the mechanical parts / mounting parts (assist force applying tool) that give power assist from the scissors / shearing tool, additional modification and mounting can be performed on the existing scissors / shearing tool. As a result, the financial burden on the barber or the like can be reduced, and familiar or desired scissors / shearing tools can be used.
On the other hand, the scissors and the assist force applying unit 4 may not be separately configured, but may be integrated in advance. In this case, the first scissors semifield 1 and the sliding portion 43, and the second scissors semifield 2 and the support fixing portion 42 can be integrally formed.

Each component will be described in detail below.

Static blade 2a (second scissors semifield 2):
For example, in the case of right-handed scissors for barber and beauty, the ring finger is put in the ring of the handle 2b of the scissors (ring finger ring 2c), and the scissors are supported by the remaining three fingers except the thumb. This keeps the scissors semifield stationary. This is called a static blade 2a.

Moving blade 1a (first scissors semifield 1):
For example, in the case of right-handed scissors for barber / beauty, another thumb is inserted into the ring of the handle 1b (thumb ring 1c), and the scissors are operated by moving this finger to cut the hair. This is called a moving blade 1a.

Hit point 11:
It is a part that cushions (absorbs) the impact when the second scissors half body 2 (static blade 2a) side finger insertion ring and the first scissors half body 1 (moving blade 1a) side finger insertion ring interfere with each other when the scissors are closed. , The material should be an elastic body that absorbs impact, such as rubber. It is fixed to the first scissors semifield 1 (moving blade 1a) side finger insertion ring (thumb ring 1c) by screwing.

Shaft branch 33:
The shaft support portion 3 has, for example, a base screw, and the base screw is a screw in which a female screw is processed at the center of the male screw. It changes depending on. Since this screw is fixed to the first scissors half body 1 (moving blade 1a) side, it has a structure that rotates as the first scissors half body 1 (moving blade 1a) side is opened and closed.

Wire (restoring force imparting part) 41:
As the wire 41, for example, a superelastic alloy wire may be used (see below). Power assist force (restoring force) of arbitrary characteristics by combining the angle / position, wire diameter / thickness, spring constant / deformation amount of wire 41 and generated reaction force, etc., to be attached to the support / fixing portion 42 of the wire 41. Can be obtained. Regarding this installation (adjustment), it is a simple structure that the user (barber, etc.) can install by himself / herself. As the wire (restoring force applying portion) 41, in addition to the normal wire and the superelastic alloy wire, an appropriate restoring force applying portion using other elastic wire, piano wire, steel wire, copper wire or the like may be used. It can also be made of appropriate metal materials such as spring steel, stainless steel, steel and shape memory alloys, and appropriate wire (linear ones) of appropriate materials such as chemical substances such as beryllium, plastic, rubber and nylon. A resilience imparting unit can be used. Further, the wire (restoring force applying portion) 41 includes a wire having an appropriate cross section such as an ellipse, a polygon, or a trapezoid, in addition to a normal round cross section (see below).

Support fixing part 42:
The wire 41 is fixed / supported to the support / fixing portion 42 to the attachment portion 46 of an appropriate means for press-fitting / inserting, gluing, fixing with screws or the like. Further, the support fixing portion 42 is fixed to the static blade 2a by an appropriate means such as a latch structure using screws, pin press-fitting, claws, a magnet, or adhesion (see below). In this example, the mounting portion 46 for mounting the wire 41 to the support fixing portion 42 is provided with a hole for press-fitting / inserting. For example, the wire 41 may be attached to one attachment portion 46 in advance, and the restoring force may be set in advance. Alternatively, a plurality of mounting portions 46 are provided at different positions and / or angles, and the user or the like selects one of the mounting portions 46 to mount the wire 41, thereby adjusting the restoring force according to each mounting portion 46. It may be possible (see below).

Sliding part 43:
When the scissors are opened, the wire 41 only passes through the hole of the free end side sliding portion 43, so that the wire 41 moves smoothly without being restrained. In this example, a hole is used, but the hole is not limited to the hole, and an appropriate shape such as a concave portion, a U-shaped portion, or a groove may be used (see below). The material of the sliding portion 43 is, for example, a material used for a sliding bearing such as Teflon (registered trademark), Luron (trade name), ceramics, etc., which has less frictional resistance with respect to the wire 41, and an oil-impregnated bearing. The material is good, but not limited to this. In addition to this method, the connection structure on the free end side includes a method using a stranded wire, a method using a link mechanism, a method using a roller, and the like (see below).

Fixing screw 44:
This is a screw for fixing the support fixing portion 42 to the second scissors semifield 2 (static blade 2a) side. For example, since the screw is fixed to the base screw, when the base screw turns, the fixing screw 44 also turns (note that the support fixing portion 42 is fixed to the second scissors semifield 2 (static blade 2a) side. It has been.).

Protective cap 45:
The protective cap 45 can be attached for a protective purpose to prevent the danger of exposing the free end of the wire 41, and for fixing a decorative structure by screwing, press-fitting, adhesively, or the like. Alternatively, the protective cap 45 may be omitted, and an end treatment method such as bending and rounding the tip by metal processing may be used.

When the present invention and / or the present embodiment is applied to a shearing tool, for example, the first scissors half body and the second scissors half body are referred to as the first shearing tool half body and the first shearing tool half body, respectively, in the description. By replacing it with two shearing tool semifields, the same configuration as scissors can be adopted.

C. Wire (restoring force imparting part) 41

FIG. 3 shows an explanatory diagram of the characteristics of the superelastic alloy.
The characteristics of the superelastic alloy and the structure on the free end side of the wire will be described below.
When ordinary metal materials are deformed beyond the elastic region and unloaded, only the elastic deformation is returned and permanent strain remains, but superelastic alloys are removed even if a large deformation exceeding Hooke's law (elastic law) is applied. When loaded, the strain disappears and returns to its original shape. (If necessary, see, for example, Furukawa Electric website https://www.furukawa-ftm.com/index.htm, etc.)
Since the stress of the superelastic alloy is almost constant in the yield state, the stress applied to the bending deformation portion of the superelastic alloy wire 41 that deforms when the shears are opened hardly changes beyond a certain opening angle.

The above-mentioned characteristics of the superelastic alloy wire 41 can be applied to the scissors / shearing tool. Even in this case, the wire 41 having a characteristic that the load received by the user's hand does not exceed a certain level can be used.

FIG. 18 shows an explanatory diagram of a wire (spring) mounting method.
FIG. 18A is an explanatory view when a torsion spring is attached.
When a torsion spring such as the state 109 when the spring is free is attached as an assist force, as shown in the graph, the opening angle of the shears and the reaction force of the spring are in a proportional relationship, so the opening angle of the shears. The larger the value, the larger the reaction force (restoring force) of the spring. In this method, the resistance load increases with the opening angle of the spring as well, so the assist force when closing the scissors is sufficiently generated, but the force applied to the arm and fingers when opening the scissors becomes excessive, and the arm From the viewpoint of reducing the burden on the fingers, it may not be preferable. In addition, if the spring reaction force becomes excessive, the momentum for closing the scissors may increase.

FIG. 18B is an explanatory diagram in the case of the mounting method of the mechanism (this mechanism) of the present invention and / or the present embodiment.
Since the wire end of the first scissors semifield 1 (moving blade 1a side) of the scissors is not fixed and is a free end, the length of the wire 41 (distance L from the cantilever support portion) when opening the scissors. ) Becomes longer (L2> L1), which is advantageous for generating a moment of force (torque). By the mounting method of this mechanism, it is possible to reduce the force (load resistance received by the arm and finger) that must be generated by hand when opening the scissors, and the burden on the user's arm and finger can be reduced.
Further, by using a superelastic alloy for the wire 41, the force required for opening the scissors can be further reduced.
In the mounting method of this mechanism, even with a normal spring steel wire, the reaction force is reduced as shown in the graph due to the non-linearity due to the spring mounting method, so that the reaction force can be suppressed when the opening angle is large.

Hereinafter, various shapes of the wire 41 will be described. The wire 41 may have various shapes as shown in the figure.
FIG. 4 shows a configuration diagram of various shapes of the wire 41.
FIG. 4A shows a round cross section and the same cross-sectional shape over the length direction.
FIG. 4B shows a square cross section and the same cross-sectional shape over the length direction.
FIG. 4C has a square cross section and a shape that becomes thinner toward the tip.
FIG. 4D has a round cross section and a shape that becomes thinner toward the tip.

The wire 41 such as the superelastic alloy wire having the basic structure of the present embodiment has the same cross-sectional shape as all the circles, but has a square cross-sectional shape, a polygonal cross-section, an ellipse, a trapezoidal shape, etc. as shown in the above figure. Various cross-sectional shapes can be appropriately adopted. Further, the cross-sectional shape and thickness may be uniform in the length direction, or may not be uniform. When a shape that becomes thinner toward the tip is used, there is a characteristic that a spring reaction force (restoring force) can be obtained while suppressing the load when opening the scissors.

D. Support fixing part 42

The attachment angle / position of the wire 41 to the support / fixing portion 42 and the reaction force (restoring force) of the spring will be described below.

FIG. 5 shows an explanatory view of the mounting angle of the wire 41 and the reaction force (restoring force) of the spring.
The deformed state of the wire 41 when the scissors are opened differs as shown in FIGS. A to C due to the difference in the angle at which the wire 41 near the center of the scissors is supported and fixed. The relationship between the opening angle of the scissors and the reaction force (restoring force) of the spring is as shown in graphs A to C for each angle.

FIG. 6 shows an explanatory diagram of the mounting position of the wire 41 and the reaction force (restoring force) of the spring.
Even if the angle at which the wire 41 is supported and fixed near the center of the scissors is constant, the deformed state of the wire 41 when the scissors are opened differs as shown in FIGS. The relationship between the opening angle of the scissors and the spring reaction force (restoring force) is as shown in Graphs D to F, respectively.

FIG. 7 shows an explanatory diagram of the mounting position of the (superelastic alloy) wire 41 on the support side with respect to the scissors and the reaction force (restoring force) of the spring.
When the position of the end portion that supports and fixes the wire 41 changes with respect to the scissors, the deformed state of the wire 41 when the scissors are opened differs as shown in FIGS. The relationship between the opening angle of the scissors and the spring reaction force (restoring force) is as shown in Graphs H to G, respectively.

FIG. 8 shows an explanatory diagram of the mounting position of the (superelastic alloy) wire 41 on the free end side with respect to the scissors and the reaction force (restoring force) of the spring.
When the position of the end portion on the free end side of the wire 41 changes with respect to the scissors, the deformed state of the wire 41 when the scissors are opened differs as shown in FIGS. I to J. The relationship between the opening angle of the scissors and the spring reaction force (restoring force) is as shown in Graphs I to J, respectively.

As described above, a desired spring reaction force (restoring force) can be set by appropriately combining the angle and / or position of attaching the wire 41. Regarding the restoring force, one characteristic may be preset, or the angle and / or position may be combined and preset so as to set a plurality of characteristics. When setting a plurality of characteristics, the support fixing portion 42 is provided with a plurality of mounting portions 46 such as insertion ports for setting wires 41 corresponding to the plurality of characteristics so as to have a plurality of characteristics, and the user can mount one of them. By selecting the unit 46 and setting the wire 41, it is possible to select and set the desired restoring force characteristics. Regarding each mounting portion 46, only the angle may be changed, only the position may be changed, or both may be changed.

FIG. 9A shows an explanatory view of a modified example (1) of the support fixing portion 42.
This modification (1) shows an example of a mounting portion 46 in which an angle and a position are combined. With the configuration as shown in the figure, the range of the restoring force can be widened or set to an appropriate range. Any angle and / or position, or a combination thereof, can be predetermined as appropriate.

FIG. 9B shows an explanatory view of a modified example (2) of the wire 41 support / fixing portion 42.
In the above description, the attachment of the wire 41 to the support fixing portion 42 is fixed by inserting the wire 41 into the hole, but the present invention is not limited to this, and the attachment portion 46'of the modified example (2) is not limited to this. As described above, the structure may be such that the wire 41 is sandwiched or fixed in a recess or a groove.
Shows an explanatory diagram of.

Next, various methods for fixing the support fixing portion 42 to the scissors will be described.

FIG. 10 shows a configuration diagram of the set screw method.
In this example, the support fixing portion 42 is fixed to the second scissors semifield 2 on the static blade side with a set screw 101 from the side.

FIG. 11 shows a configuration diagram of the screw method.
In this example, the support fixing portion 42 is fixed to the second scissors semifield 2 on the static blade side with a screw 102 from the upper surface.

FIG. 12 shows a configuration diagram of the pin method.
In this example, the support fixing portion 42 is fixed to the second scissors semifield 2 on the static blade side by inserting the pin 103 from the upper surface.

FIG. 13 shows a configuration diagram of the claw method.
In this example, the second scissors semifield 2 on the static blade side is sandwiched and fixed by a support fixing portion 42 having a fixing claw 104.

FIG. 14 shows a configuration diagram of the magnet method.
In this example, the support fixing portion 42 in which the magnet 105 is embedded is magnetically fixed to the second scissors semifield 2 on the static blade side.

As another method for fixing the support / fixing portion 42, for example, the following method can be used.
-Fixing with adhesive-Fixing with double-sided tape-Fixing with hook-and-loop fastener (magic tape (registered trademark))

E. Sliding part 43

Hereinafter, various configurations for attaching the sliding portion 43 on the free end side of the wire to the handle 1b (thumb ring 1c) of the scissors will be described. These various configurations may be used.

FIG. 15 shows a configuration diagram of the stranded wire system.
In this example, the stranded wire 106 is fixed in the vicinity of the finger insertion ring of the first scissors semifield 1 on the moving blade side, and the free end wire on the opposite side is connected.

FIG. 16 shows a configuration diagram of the link method.
In this example, the link arm 107 mechanical component is fixed in the vicinity of the finger insertion ring of the first scissors semifield 1 on the moving blade side, and the free end wire on the opposite side is connected.

FIG. 17 shows a configuration diagram of the roller system.
In this example, the roller 108 mechanical component is fixed in the vicinity of the finger insertion ring of the first scissors semifield 1 on the moving blade side. When the scissors open, the roller that comes into contact with the wire 41 rotates, so that contact resistance (friction) can be suppressed.

1 1st scissors semifield 2 2nd scissors semifield 3 Shaft branch 3
4 Assist force granting part (Assist force granting tool)
41 Wire (restoring force imparting part)
42 Support fixing part 43 Sliding part 44 Fixing screw 45 Protective cap 46 Mounting part

Claims (11)

In a scissors or shearing tool provided with a first scissors half body, a second scissors half body, a shaft support portion for rotatably connecting the first scissors half body and the second scissors half body, the first scissors half body. An assist force applying unit that applies an assist force to cutting by the body and the second scissors semifield.
A restoring force imparting portion having one end and the other end,
A support fixing portion that supports one end side of the restoring force applying portion and is fixed to the shaft support portion or the first scissors semifield.
It has a sliding portion that slidably supports the other end side of the restoring force applying portion and is fixed to the second scissors semifield.
The restoring force applying portion is elastically deformed when the handles of the first scissors half body and the second scissors half body are opened, and a force that tries to return to the original state acts when the handles are closed. Powering tool.
It ’s a pair of scissors
The first scissors semifield and
The second scissors semifield and
A shaft support that rotatably connects the first scissors half body and the second scissors half body, and
An assist force applying unit that imparts an assist force to cutting by the first scissors semifield and the second scissors semifield,
With
The assist force applying unit is
A restoring force imparting portion having one end and the other end,
A support fixing portion that supports one end side of the restoring force applying portion and is fixed to the shaft support portion or the first scissors semifield.
It has a sliding portion that slidably supports the other end side of the restoring force applying portion and is fixed to the second scissors semifield.
The restoring force applying portion is elastically deformed when the handles of the first scissors half body and the second scissors half body are opened, and a force to return to the original state acts when the handles are closed. ..
In the scissors or assist force imparting tool according to claim 1 or 2.
The mounting angle or position of the restoring force applying portion to the support fixing portion, the spring constant or deformation amount of the restoring force applying portion and the generated reaction force, the diameter or thickness of the restoring force applying portion, and the restoring force applying portion. A scissors or an assisting force imparting tool, characterized in that a power assisting force having predetermined characteristics is set by setting a cross-sectional shape or a combination thereof.
In the scissors or assisting force imparting tool according to any one of claims 1 to 3.
The support fixing portion includes a plurality of mounting portions having different positions and / or angles for supporting one end side of the restoring force applying portion.
A scissors or an assist force applying tool, wherein the power assist force can be adjusted by selecting one of the plurality of mounting portions and supporting one end side of the restoring force applying portion.
In the scissors or assisting force imparting tool according to any one of claims 1 to 4.
The restoring force applying portion is a superelastic alloy wire, and the opening range of the handle of the first shear half body and the second shear half is set to an opening angle / displacement exceeding the elastic region of the characteristics of the superelastic alloy wire. A scissors or assisting force imparting tool, characterized in that it does.
In the scissors or assisting force imparting tool according to any one of claims 1 to 5.
The support fixing portion is a scissors or an assisting force imparting tool characterized in that the support fixing portion is fixed to the shaft support portion or the second scissors semifield by a latch structure by a claw or a magnet.
In the scissors or assisting force imparting tool according to any one of claims 1 to 5.
The shaft support has a base screw in which a female screw is processed in the center of the male screw.
The support fixing portion was attached to the female screw of the base screw by a screw.
A pair of scissors or an assisting force imparting tool.
In the scissors or assisting force imparting tool according to any one of claims 1 to 7.
The sliding portion has a hole or recess or a U-shaped portion or groove through which the restoring force applying portion is slidably passed, and is attached to the handle portion or ring or hit point of the first scissors semifield. Characteristic scissors or assisting force imparting tool.
In the scissors or assisting force imparting tool according to any one of claims 1 to 8.
A stranded wire, one of which is fixed to a finger insertion ring of the first scissors semifield and the other of which is connected to a component that slidably supports the other end side of the restoring force applying portion. A pair of scissors or an assisting force imparting tool, further comprising a link arm mechanism component or a roller mechanism component.
In the scissors according to any one of claims 1 to 9.
A scissors characterized in that the first scissors half body and the sliding portion, and the second scissors half body and the support fixing portion are integrally formed.
Shearing tool
The first shear tool semifield and
Second shear tool semifield and
A shaft support that rotatably connects the first shear tool half body and the second shear tool half body, and
An assist force applying portion that applies an assist force to cutting by the first shear tool half body and the second shear tool half body,
With
The assist force applying unit is
A restoring force imparting portion having one end and the other end,
A support fixing portion that supports one end side of the restoring force applying portion and is fixed to the shaft support portion or the first shear tool half body.
It has a sliding portion that slidably supports the other end side of the restoring force applying portion and is fixed to the second shear tool half body.
The restoring force applying portion is elastically deformed when the handle of the first shearing tool half body and the second shearing tool half body is opened, and a force trying to return to the original state acts when the handle is closed. , Shearing tool.

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