JP4477693B1 - Scissors - Google Patents

Abstract

An object of the present invention is to provide a scissor in which impacts and vibrations generated in a blade portion when using scissors are reduced and these impacts and vibrations are not easily transmitted to a user's hand holding the scissors.
A scissor 1 is provided with an elastic portion 6 having an elastic body 11 provided on at least one of two blade bodies 2a, 2b and interposed between an intersection 3 and finger ring portions 5a, 5b.
[Selection] Figure 1

Description

  The present invention relates to scissors applicable from a use as a stationery to a use as a professional tool in hairdressing and beauty or tailoring clothes.

  Scissors are one of the stationery and are important tools that are indispensable for specific occupations such as hairdressing and tailoring of clothes, so there are those with various shapes and functions depending on their use. .

  For those who use scissors for a long time every day, such as a hairdresser, for example, it will cut well, but scissors, tendonitis or injuries that can prevent tendonitis of the fingers of the hand, known as a barber's occupational disease There is a need for scissors that do not cause pain in the hands that hold the scissors even when they are handled with the hand.

  The cause of tendonitis in the hands and arms of people who use scissors for a long time is thought to be shock and vibration transmitted to the hand holding the scissors when the scissors are opened and closed. Therefore, in order to alleviate the shock and vibration transmitted to the hand holding the scissors when opening and closing the scissors, the scissors have been devised in the form of the finger ring portion through which the fingers of the hand are passed when the scissors are gripped (see, for example, Patent Document 1) ) And scissors described in Patent Documents 2 and 3 described below have been developed.

  Patent Document 2 discloses scissors in which a damping alloy is interposed in a handle portion between a blade portion and a finger ring portion for cutting an object. In this scissors, vibration generated in the blade portion when cutting the object is attenuated by the damping alloy of the handle portion, so that it is difficult to be transmitted to the user's hand holding the finger ring portion.

  Patent Document 3 discloses a scissor in which a viscoelastic body such as soft urethane or silicon rubber is embedded in a handle. In this scissors, the impact and vibration generated at the blade by the opening and closing of the scissors are absorbed by the viscoelastic body of the handle, so the impact and vibration generated at the blade are not easily transmitted to the user's hand holding the finger ring. ing.

JP 2006-175123 A JP 2008-5896 A International Publication No. 2006/022368 Pamphlet

  However, the scissors disclosed in Patent Document 2 cannot be said to be sufficiently damped. Furthermore, this scissor is not suitable for mass production and has a problem in practical use because it is assumed that it is necessary to adjust the weight or hardness of the damping alloy by changing the composition of the damping alloy according to the application.

  The scissors disclosed in Patent Document 3 require a complicated work of fitting a viscoelastic body into the handle during manufacture. Further, in the scissors, there is an embodiment in which one or a plurality of metal members are continuous from the blade edge to the finger ring portion. In such an embodiment, an impact or vibration generated on the blade edge side is transmitted to the metal member and reaches the finger ring portion.

  Furthermore, in the conventional scissors including those described in Patent Documents 1 to 3, when closing the blade tips of two blade bodies, such as when cutting an object, the user's hand is used to stop the rotational movement of the blade bodies. The finger ring portions that are being gripped collide with each other. Therefore, in the conventional scissors, the finger ring itself held by the user's hand is also a source of impact and vibration.

  In view of the above problems, an object of the present invention is to provide a scissor in which the impact and vibration generated in the scissors are reduced by opening and closing the scissors, and these impacts and vibrations are not easily transmitted to the user's hand holding the scissors. .

  In order to solve the above problems, the inventor has intensively studied, and as a result, has completed the present invention. That is, according to the present invention, the following scissors are provided.

[1] A pair of scissors in which two blades intersect at an intersection and are rotatably connected around the intersection, the two blades being a blade portion having a blade edge and a blade, and the intersection A finger ring portion on the opposite side of the blade edge, provided on at least one of the two blade bodies, protruding on a rotation trajectory in a direction to close the blade edge of the counterpart blade body, A rotation stopping portion that stops the rotation of the two blade bodies in the direction of closing the blade edges by contacting the other blade body, and at least one of the two blade bodies includes the rotation stopping portion; In the blade body, the intersection and the finger ring portion are closer to the finger ring portion than the rotation restraining portion, and in the counterpart blade body is closer to the finger ring portion than the portion in contact with the rotation restraining portion. An elastic part is provided between the elastic part and the elastic part The crossing point and the finger ring portion are arranged so that the blade member on the side of the intersection with respect to the elastic portion and the blade member on the side of the finger ring with respect to the elastic portion are not in direct contact with each other. an elastic body interposed between, in the blade body in which the elastic portion is provided, the side of the finger ring portion than member and the resilient portion of the blade body than said elastic portion on the side of the intersection The scissors in which the member of the blade body is fitted with the elastic body interposed therebetween .

[2] The scissors according to [1], wherein in the blade body provided with the elastic portion, the blade portion and the finger ring portion are fitted via the elastic body.

[ 3 ] The rotation restraining portion protrudes from the vicinity of the intersection point on the blade back contacting the blade portion of the counterpart blade body when the blade edge is closed in the blade portion of the blade body, The blade body has a notch at a portion on the same circumference as the rotation restraining portion around the intersection at the edge of the blade portion, and the notch inserts the rotation restraining portion to insert the rotation restraining portion. The scissors according to [1] or [2] , wherein the scissors are in contact with a rotation restraining portion and restrain the rotation of the two blade bodies in the direction of closing the cutting edges.

[4] the rotation restraining portion, said provided such that the distance from the intersection is smaller than the distance from the side in and the intersection of the than the intersection edge until the elastic portion [1] - [3 ] The scissors according to any one of

[ 5 ] The scissors according to [4] , wherein a distance from the rotation stopping portion to the intersection is 1/20 or less of a distance from the intersection to the elastic portion.

  The scissors of the present invention reduce the impact and vibration generated in the scissors by opening and closing the scissors, and these impacts and vibrations are not easily transmitted to the user's hand holding the scissors.

It is a front view of one embodiment of the scissors of the present invention. It is A-A 'sectional drawing in FIG. It is B-B 'sectional drawing in FIG. It is the front view which expanded the scissors shown in FIG. 1 from the intersection vicinity to a finger ring part. It is an enlarged front view of the scissors of this invention showing a mode that the blade body was rotated from the state shown in FIG. 4 in the direction which a blade edge | tip closes, and rotation of the blade body was stopped by the rotation stop part. It is A-A 'sectional drawing in FIG. FIG. 6 is a B-B ′ sectional view in FIG. 5. It is an enlarged front view of the scissors of this invention in which the rotation stop part and the notch part are provided in the vicinity of the intersection on the finger ring part side. It is an enlarged front view of the scissors of this invention showing a mode that the blade body was rotated from the state shown in FIG. 8 in the direction in which the blade edge is closed, and the rotation of the blade body was restrained by the rotation restraining part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and changes, modifications, and improvements can be added without departing from the scope of the present invention.

1. Summary of scissors of the present invention:
FIG. 1 is a front view of a scissor 1 belonging to the technical scope of the present invention. In the scissors 1 of the present invention, two blade bodies 2 a and 2 b intersect at an intersection point 3, and the blade bodies 2 a and 2 b are connected so as to be rotatable around the intersection point 3. In the scissors 1 of the embodiment shown in FIG. 1, a hole that penetrates both of the blade bodies 2a and 2b is provided at the intersection 3 of the blade bodies 2a and 2b, and this hole is made to penetrate the blade bodies 2a and 2b together. The two blade bodies 2a and 2b are connected by passing a screw 35 so as to penetrate the blade bodies 2a and 2b.

  The blade bodies 2a and 2b include blade portions 4a and 4b and finger ring portions 5a and 5b, respectively. The blade portions 4a and 4b have a blade edge 32 and blades 31a and 31b, respectively. Further, the finger ring portions 5a and 5b are on the side opposite to the blade edge 32 with respect to the intersection 3 in the blade bodies 2a and 2b.

  Also in the scissors 1 of the present invention, by rotating the two blade bodies 2a and 2b, the blade tip 32 and the opposed blades 31a and 31b can be opened and closed, and the object placed between the blades 31a and 31b can be cut. If the blade bodies 2a, 2b are rotated in a direction in which the finger ring portions 5a, 5b are brought close to each other, the blade edge 32 is closed, and if the blade bodies 2a, 2b are rotated in a direction in which the finger ring portions 5a, 5b are separated from each other, the blade edge 32 is opened.

  In particular, the scissors 1 of the present invention are characterized by having an elastic portion 6, and impacts and vibrations generated in the blade bodies 2 a and 2 b when the blade tip 32 is opened and closed or when an object is cut are caused by the finger ring portions 5 a and 5 b. It is difficult to reach the user's hand. Hereinafter, the elastic part 6 will be described in detail.

2. Elastic part:
In the scissors 1 of the present invention, the elastic portion 6 is provided on at least one of the blade bodies 2a and 2b. FIG. 1 shows an embodiment in which elastic portions 6 are provided on both blade bodies 2a and 2b. When the elastic part 6 is provided in the blade body 2a, the elastic part 6 exists between the intersection 3 and the finger ring part 5a. Moreover, when the elastic part 6 is provided in the blade body 2b, the relationship between the elastic part 6 and the intersection 3 and the finger ring part 5b is the same.

  Since an impact and vibration can occur in both the blade bodies 2a and 2b, it is preferable that the elastic portion 6 is provided in both of the two blade bodies 2a and 2b.

  2 is a cross-sectional view taken along the line AA ′ in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB ′ in FIG. 1. In these figures, the elastic portion 6 of the scissors 1 of the embodiment shown in FIG. Represents the relationship between the blade portion 4b and the finger ring portion 5b.

  Referring to the blade body 2b shown in FIGS. 2 and 3, the elastic portion 6 has an elastic body 11 interposed between the intersection 3 and the finger ring portion 5b.

  “The elastic body 11 is interposed between the intersection 3 and the finger ring portions 5 a, 5 b” means that the members of the blade bodies 2 a, 2 b located closer to the intersection 3 than the elastic portion 6 and the finger ring portion than the elastic portion 6 The member of blade body 2a, 2b in the side of 5a, 5b says the form which is connected through the elastic body 11, without contacting directly. In the embodiment shown in FIGS. 2 and 3, the blade portion 4 b that is a member on the side of the intersection 3 relative to the elastic body 6 and the finger ring portion 5 b on the opposite side of the intersection 3 across the elastic portion 6 are in direct contact. Not.

  Further, as shown in the cross-sectional view of the elastic part 6 in FIG. 3, a space is provided between a part of the blade part 4b and a part of the finger ring part 5b like both side parts where the elastic body 11 is exposed, The blade portion 4b and the finger ring portion 5b may not be in direct contact with each other.

  Examples of the elastic body 11 include a member made of a material having elasticity by a molecular structure such as epoxy resin, soft urethane, or silicon rubber.

  Referring to the blade body 2b shown in FIGS. 2 and 3, when the elastic body 11 is a member having elasticity such as an epoxy resin, soft urethane, or silicone rubber, the elastic portion 6 includes the blade portion 4b and the finger ring portion. 5b is preferably fitted with the elastic body 11 interposed therebetween.

  In the elastic part 6 shown in FIGS. 2 and 3, a concave part is provided at the end part of the blade part 4b, and a convex part is provided at the end part of the finger ring part 5b, and the surface of the convex part of the finger ring part 5b is made of the above-mentioned epoxy resin or soft urethane. The elastic body 11 is covered. Furthermore, the convex part of the finger ring part 5b covered with the elastic body 11 is pressed and fitted into the concave part of the blade part 4b as it is. In contrast to this, an embodiment in which the end portion of the blade portion 4b is formed as a convex portion, the elastic body 11 is coated on the end portion, and pressed into the concave portion at the end portion of the finger ring portion 5b may be fitted.

  In the blade bodies 2a and 2b having the elastic portion 6 as described above, the elastic body 11 must be moved at least once in order for the shock and vibration generated on the blade edge 32 side to the elastic portion 6 to be transmitted to the finger ring portions 5a and 5b. Will pass. Therefore, these impacts and vibrations are absorbed and attenuated by the elastic body 11 and are not easily transmitted to the finger ring portions 5a and 5b.

  The scissors 1 of the present invention can have the features described so far, and can also be in the embodiment described below.

3. Rotation stop:
Referring to FIG. 1, in the scissors 1 of the present invention, it is preferable that at least one of the two blade bodies 2a, 2b is provided with a rotation stop portion 7 described in detail below.

  First, a drawing referred to for explaining the rotation stopping portion 7 will be described. FIG. 4 is an enlarged view of the front view of the scissors 1 shown in FIG. 1 from the vicinity of the intersection 3 to the finger ring portions 5a and 5b. FIG. 5 shows a state in which the blade bodies 2a and 2b are rotated in the direction of closing the blade edge 32 from the state shown in FIG. 6 is a cross-sectional view taken along the line AA ′ in FIG. 4, and FIG. 7 is a cross-sectional view taken along the line BB ′ in FIG. 5, and these figures show the rotation of the blade bodies 2 a and 2 b closing the blade edge 32. The relationship between the blade body 2a provided with the rotation stopping portion 7 and the counterpart blade body 2b is shown.

  Referring to the blade bodies 2a and 2b shown in FIG. 6, the rotation stopping portion 7 protrudes on the rotation track 30 in the direction in which the blade edge of the counterpart blade body 2b is closed in the blade body 2a.

  Therefore, when the blade bodies 2a and 2b shown in FIG. 6 continue to rotate in the direction in which the blade edge 32 is closed, as shown in FIG. 7, the rotation stop portion 7 protruding from the blade body 2a contacts the counterpart blade body 2b. To do. By this contact, the rotation in the direction of closing the blade edges 32 of the two blade bodies 2a and 2b is restrained. The “protrusion” of the rotation restricting portion 7 falls within the category as long as it exhibits the above-described action. For example, the blade 2a has a shape in which a part of the blade body 2a blocks the rotation path 30 of the other blade body 2b. If the body 2a is provided, it enters the category that the rotation stop portion 7 protrudes from the blade body 2a.

  Further, as shown in FIG. 5, when the rotation stop portion 7 and the counterpart blade body 2b are in contact with each other, the width of the gap g between the finger ring portion 5a and the finger ring portion 5b is sufficiently secured. And preferred. Even when the blade edge 32 is opened and closed vigorously by the gap g, collision between the finger ring portion 5a and the finger ring portion 5b is prevented, and the finger ring portions 5a and 5b themselves do not become a source of impact or vibration. For example, when the blades 2a and 2b are slightly bent due to the action of the elastic portion 6, even if the blades 2a and 2b are bent, the finger ring portion 5a and the finger ring portion 5b still collide violently. It is preferable that the width of the gap g between the finger ring portion 5a and the finger ring portion 5b is determined so that it does not collide or does not collide at all.

  FIG. 8 is an enlarged front view of the scissors 1 belonging to the technical scope of the present invention, and the scissors 1 shown in this figure includes a rotation restraining portion 7 of an embodiment different from those of FIGS. FIG. 9 is an enlarged front view of the scissors 1 rotated in the direction of closing the blade edge 32 from the state shown in FIG. As can be seen from a comparison between FIG. 4 and FIG. 8, the rotation restricting portion 7 may be closer to the cutting edge 32 than the intersection 3 or closer to the finger ring portions 5 a and 5 b.

3-1. Positional relationship between elastic part and rotation stop part:
Referring to the scissors 1 shown in FIG. 1 as a specific example, in the following description, in the embodiment having the rotation restraining portion 7, the contact between the rotation restraining portion 7 provided on the blade body 2 a and the counterpart blade body 2 b. In order to absorb and attenuate the shock and vibration generated in the blades 2a and 2b before being transmitted to the finger ring portions 5a and 5b, the positional relationship between the elastic portion 6 and the rotation restraint portion follows the first to third rules described below. .

  First, when the blade body 2 a having the rotation stop portion 7 includes the elastic portion 6, the elastic portion 6 is provided closer to the finger ring portion 5 a than the rotation stop portion 7.

  Secondly, when the other blade body 2 b that comes into contact with the rotation restraining portion 7 by closing the blade edge 32 includes the elastic portion 6, the elastic portion 6 has a finger ring portion rather than a portion that comes into contact with the rotation restraining portion 7. Provided on the 5b side.

  Thirdly, although not shown here, when the rotation restraining portions 7 are provided on both of the two blade bodies 2a and 2b, the elastic portion 6 in each of the blade bodies 2a and 2b has the above-mentioned first rule. And a position that complies with both the second rule.

  In the blade bodies 2a and 2b, the rotation restraining portion 7 and the portion of the counterpart blade body 2b in contact with the blade body 2b are sources of shock and vibration. However, as long as the above first to third rules are followed, the elastic portion 6 It is arranged between the generation source and the finger ring portions 5a and 5b. Therefore, the impact and vibration generated by the contact between the rotation stop portion 7 and the counterpart blade body 2b are attenuated and absorbed by the elastic portion 6, and are not easily transmitted to the user's hand holding the finger ring portions 5a and 5b.

  In the embodiment having the rotation restricting portion 7, since the rotation restricting portion 7 provided on one blade body 2 a and the counterpart blade body 2 b come into contact with each other, impact and vibration are generated in both the blade bodies 2 a and 2 b. It is preferable that the elastic portions 6 are provided on both the blade bodies 2a and 2b.

3-2. Embodiment that absorbs and attenuates shock and vibration generated from the rotation stop using the lever principle:
Referring to FIG. 4, in the scissors 1 of the present invention, in the embodiment having the rotation restricting portion 7, the rotation restricting portion 7 is closer to the blade edge 32 than the intersection point 3, and from the intersection point 3 to the elastic portion 6. It is preferable that the distance r from the rotation stop portion 7 to the intersection 3 is smaller than the distances Ra and Rb.

  In this embodiment, considering that the impact and vibration are transmitted to both the blade bodies 2a and 2b due to the contact between the rotation stop portion 7 and the counterpart blade body 2b, the distance r from the rotation stop portion 7 to the intersection is The distance Ra from the intersection point 3 to the elastic part 6 in the blade body 2a including the rotation stopping part 7 and the distance Rb from the intersection point 3 to the elastic part 6 in the other blade part 2b receiving the rotation stopping part 7 are small. .

  When this embodiment is applied to the principle of leverage, the intersection 3 which is the center of rotation of the blades 2a and 2b corresponds to a fulcrum, and the rotation restraining part 7 and the part of the other blade 2b in contact with this are the power points. The elastic part 6 corresponds to an action point. Therefore, with respect to the impact and vibration generated by the contact between the rotation stop portion 7 and the counterpart blade body 2b, the magnitude of force assumed to be required to absorb the shock and vibration in the vicinity of the rotation stop portion 7 is larger. In the elastic part 6 with the intersection point 3 interposed between the rotation stop part 7 and the distance from the intersection point 3 being kept larger, these impacts and vibrations can be suppressed with a smaller absorption force.

  In order to more effectively absorb and attenuate shocks and vibrations by applying such a lever principle, the distance r from the rotation stop portion 7 to the intersection point 3 is set to the distances Ra and Rb from the intersection point 3 to the elastic portion 6. It is more preferable that it is 1/20 or less.

4). Notch:
As shown in FIGS. 4 and 6, in the scissors 1 of the present invention, when the rotation restraining portion 7 protrudes from the vicinity of the intersection 3 on the blade back 38a, as shown in detail below, It is preferable to provide a notch 21 at the edge of the blade 4b. The blade back 38a refers to a portion of the blade portion 4a of one blade body 2a that contacts the blade portion 4b of the counterpart blade body 2b when the blade edge 32 is closed.

  When considering the rotation of the blade bodies 2a and 2b transitioning from the state of FIG. 4 to the state of FIG. 5, the notch 21 is the same as the rotation restraint 7 around the intersection 3 at the edge of the blade 4b. It is provided in the part on the circumference. As a result, when the blades 2a, 2b are rotated in the direction to close the blade edge 32, the rotation stop portion 7 is inserted into the notch portion 21, and finally, as shown in FIGS. The wall surface of the notch portion 21 and the rotation restraining portion 7 come into contact with each other, and the rotation of closing the blade edges 32 of the blade bodies 2a and 2b is restrained.

  When the embodiment shown in FIG. 4 is described as an example, when the rotation stopping portion 7 is on the side of the blade edge 32 from the intersection 3, the notch portion 21 is located on the blade 31b side of the blade portion 4b in the counterpart blade body 2b. It is provided at the edge. On the other hand, when the embodiment shown in FIG. 8 is described as an example, when the rotation stop portion 7 is on the finger ring portion 5b side from the intersection 3, the notch portion 21 is on the ridge 33b side in the counterpart blade body 2b. It is provided at the edge.

  When the notch portion 21 is provided in this way, in the embodiment in which the widths from the blades 31a and 31b of the blade portions 4a and 4b to the peaks 33a and 33b are substantially the same as in the case of scissors that are generally distributed, the blade When the blade edges 32 of the bodies 2a and 2b overlap, the blade portion 4a and the blade portion 4b can be exactly overlapped with the edges aligned (see FIGS. 5 and 9).

  In addition, the rotation stop part 7 may be either a so-called moving blade or a stationary blade, and the cutout part 21 should just be provided in the other party blade body according to it.

  In the scissors 1 of the present invention described above, since impact and vibration are not transmitted to the finger ring portions 5a and 5b, tendonitis is unlikely to occur in the user's hand even when used for a long time, and tendonitis and wounds are incurred. Hands that hold scissors are less likely to hurt even if they are handled with existing hands.

  INDUSTRIAL APPLICABILITY The present invention can be used as a scissors applicable from a use as a stationery to a use as a professional tool in hairdressing and beauty tailoring or clothing tailoring.

1: scissors, 2a: blade body, 2b: blade body, 3: intersection point, 4a: blade portion, 4b: blade portion, 5a: finger ring portion, 5b: finger ring portion, 6: elastic portion, 7: rotation stop portion, 11 : Elastic body, 21: notch, 30: rotation trajectory in the direction of closing the blade edge of the blade body, 31a: blade, 31b: blade, 32: blade edge, 33a: peak, 33b: peak, 35: screw, 38a: Blade back, 38b: Blade back.

Claims (5)

Two scissors intersecting at the intersection and scissors are connected rotatably about the intersection,
The two blade bodies include a blade portion having a blade edge and a blade, and a finger ring portion on a side opposite to the blade edge with respect to the intersection point,
Provided on at least one of the two blades, protrudes on a rotation trajectory in a direction to close the blade edge of the counterpart blade, contacts the counterpart blade, and contacts the two blades. A rotation stopping portion for stopping rotation in a direction in which the blade edge is closed;
In at least one of the two blade bodies, the blade body having the rotation restraining portion is closer to the finger ring portion than the rotation restraining portion, and the rotation restraining portion in the counterpart blade body. An elastic part is provided between the intersection and the finger ring part on the side of the finger ring part from the contacting part,
The intersection and the blade so that the elastic member does not directly contact the blade member on the side of the intersection with respect to the elastic portion and the blade member on the side of the finger ring with respect to the elastic portion. an elastic body interposed between the finger ring portion,
In the blade body provided with the elastic part, the blade member on the intersection side with respect to the elastic part and the blade member on the finger ring part side with respect to the elastic part are Scissors fitted with an elastic body . The scissors according to claim 1, wherein in the blade body provided with the elastic portion, the blade portion and the finger ring portion are fitted with the elastic body interposed therebetween. The rotation stop portion protrudes from a portion in the vicinity of the intersection point on the blade back contacting the blade portion of the counterpart blade body when the blade edge is closed in the blade portion of the blade body,
The counterpart blade has a notch in a portion on the same circumference as the rotation restraining portion around the intersection at the edge of the blade,
The scissors according to claim 1 or 2 , wherein the notch portion inserts the rotation restraining portion to contact the rotation restraining portion and restrains the rotation of the two blade bodies in the closing direction. The rotation restraining part may be any one of claims 1 to 3 the distance from the intersection point than the distance from the side in and the intersection of the than the intersection edge to said elastic portion is provided to be smaller Scissors as described in. The scissors according to claim 4 , wherein a distance from the rotation stop portion to the intersection is 1/20 or less of a distance from the intersection to the elastic portion.

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