JP3013231B2 - The structure of the pivot in hairdressing scissors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in hairdressing scissors used in barber shops and beauty shops.

[0002]

2. Description of the Related Art Conventional hairdressing scissors, as shown in FIG.
The flat portions C and D formed at the bases of the blades A and B are brought into contact with each other and pivotally connected to each other by a pivot E, and the blade A is moved from the flat portions C and D toward the tip. , B are bent toward each other so that the two blades A and B are engaged with each other at the distal end thereof in a closed state, and between the flat portions C and D from the engagement portion F, the two blades A and B A small gap G exists between the opposing surfaces. Then, while the blades A and B are opened and closed to move the meshing portion F, the hair is cut at the meshing portion F.

[0003]

However, in the structure described above, since the flat portions C and D of the two blades A and B are in close contact with each other, the opening / closing operation becomes heavy and fatigue increases.
Long hairdressing work cannot be performed,
The engagement pressure of the engagement portion F for cutting the hair is a double blade body A, B
There is a problem that it is not possible to cope with the opening / closing force of the user because it is set to be constant depending on the amount of deflection of the user. For this reason, as described in Japanese Utility Model Laid-Open No. 5-85366, the applicant of the present invention pivotally attaches the flat portions of the two blades to each other with a small interval so as to be freely rotatable by screws, and connects the flat portions of the two blades to each other. In addition, the gap between the flat portions of the two blades can be adjusted by rotating the pivot screw, and the meshing pressure of the meshing portion between the blades can be set to a pressure according to the user. We have devised a hairdressing scissor constructed as described above.

[0004] Although the hairdressing scissors have the above-mentioned various advantages, they have a problem that they cannot cope with a user's habit during opening and closing operations. That is,
The direction of the force applied to the finger ring when the blade is opened and closed while the fingers are inserted into and locked by the finger ring of both blades of the hairdressing scissors differs depending on the user. In order to increase the force, open / close operation is performed while applying an opening / closing force in a direction in which the two finger hanging rings are separated from each other with respect to the longitudinal direction of the pivot. In some cases, the opening / closing operation is performed while applying an opening / closing force in a direction in which the hanging rings approach each other with respect to the longitudinal direction of the pivot.
For this reason, a twisting force acting to deflect the pivots on which the two blades are pivotally attached acts, the opening / closing operation becomes heavy and the workability is reduced, and it cannot be a hairdressing scissors suitable for the user. There was a problem. The present invention has been made in view of such a problem, and an object of the present invention is to provide a structure of a pivot portion of a hairdressing scissor that can operate according to a user's habit.

[0005]

In order to achieve the above object, a pivoting portion of the hairdressing scissors according to the present invention comprises a flat portion formed at the base of a pair of upper and lower blades, which is separated by a pivot with a gap. In the hairdressing scissors pivotally connected, a screw hole is provided in the flat portion of the lower blade body, and a through hole having a diameter larger than the screw hole is formed in the flat portion of the upper blade body. Then, the lower half of the short cylindrical body whose lower half is formed in a circular hole and whose upper half is formed in an oval shape elongated in the length direction of the blade body is fitted into the through hole. The lower end screw portion is screwed into the screw hole of the lower blade, and the middle portion and the upper end portion of the pivot are fitted into the circular hole and the oblong hole through the upper and lower bearings, respectively. And a structure is provided in which a gap is provided between the bearing and the inner peripheral surface of the oblong hole in the longitudinal direction.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The flat portions of the two blades are rotatably pivoted by a pivot and a bearing in a short cylinder with a gap therebetween, so that opening and closing operations can be performed lightly and a long time can be attained. Fatigue is also reduced during hairdressing work. In addition, the lower end of the pivot is screwed to the lower blade, and the upper end is inserted into and supported by the short cylinder fitted into the through-hole of the upper blade via a bearing. In this way, the size of the gap between the two blades can be finely adjusted, so that the optimum engagement pressure between the two blades can be set for the user.

Further, a long elliptical hole is provided in the upper half portion of the short cylinder fitted in the through hole of the upper blade body in the longitudinal direction of the blade body, and the inner periphery of the oblong hole on the longer diameter side is provided. Since a gap is provided between the surface and the bearing mounted on the upper end of the pivot, the direction in which the engagement pressure of the engagement portion of the two blades increases during hairdressing, that is, the two blades are brought into close contact. When acting on the finger ring in the direction in which the finger is engaged, or when acting on the finger ring in the direction in which the meshing pressure of the meshing portion of the two blades decreases, that is, in the direction in which the two blades are separated from each other. The upper blade slightly moves in the direction of the gap between the bearing and the inner peripheral surface on the major axis side of the oblong hole around the pivot, and absorbs the torsional force applied to the pivot by the gap to respond to the habit of the user. However, light opening and closing operations are possible, and workability is improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, specific embodiments of the present invention will be described with reference to the drawings. Reference numerals 1 and 2 denote upper and lower blades of hairdressing scissors, the bases of which are flat portions pivotally connected to each other by a pivot 3. 1a,
2a, these flat portions 1a, 2a are provided with a gap 13 between the opposing surfaces, and are slightly bent in a direction approaching each other from the flat portions 1a, 2a toward the front end, A blade meshing portion F of both blade bodies 1 and 2 is provided. Further, as is known from the flat portions 1a and 2a, respectively,
Finger rings 1b and 2b are respectively extended.

As shown in FIG. 2, the flat portion 2a of the lower blade body 2 is provided with a screw hole 4 penetrating in the vertical direction at the center thereof, and has a surface facing the upper blade body 1. A certain flat part 2a
An annular concave portion 5 having a screw hole 4 as a center is provided on the upper surface of the screw. On the other hand, in the flat portion 1a of the upper blade 1, a through hole 6 having a diameter larger than that of the screw hole 4 around the pivot 3 is formed between the upper and lower surfaces. The lower half of the short cylindrical body 7b formed in the short cylindrical part 7b having the circular hole 9 and the upper half thereof is formed in the short cylindrical part 7a having the elongated circular hole 8 long in the longitudinal direction of the blade body 1. The lower short cylindrical portion 7b is fitted. The oblong hole 8 and the circular hole 9 communicate with each other on the same center line, and the short diameter of the oval hole 8 is formed to be equal to the diameter of the circular hole 9. Further, an annular piece 10 loosely fitted in the recess 5 provided on the flat portion facing surface of the lower blade body 2 with the through hole 6 being centered on the lower surface of the flat portion 1a of the upper blade body 1 is fixed. .

A screw 3a formed at the lower end of the pivot 3 by inserting the pivot 3 into the short cylinder 7 from the upper end of the opening.
Is screwed into the screw hole 4 of the lower blade body 2 and the intermediate portion and the upper end portion of the pivot 3 are rotatable into a circular hole 8 and an oblong hole 9 via upper and lower bearings 11 and 12, respectively. Has been fitted. That is, the inner races of the upper and lower bearings 11 and 12 are fitted on the pivot 3, and the upper bearing 11 is formed so that both side surfaces of the outer race facing the blade body 1 in the width direction are formed in the shorter diameter direction of the oblong hole 8. Gaps 14 and 14 are provided between the bearing 11 and the front and rear inner peripheral surfaces on the long diameter side of the oblong hole 8 so as to be fitted on the peripheral surface in a line contact state. On the other hand, the outer race of the lower bearing 12 is loosely fitted to the inner peripheral surface of the circular hole 9 with an extremely small gap. In addition, a flanged bearing may be adopted as the lower bearing 12, and the annular piece 10 may be constituted by the flange.

Further, an enlarged head 3b of the pivot 3 is projected from the upper end of the short cylindrical body 7, and a groove 3c for pivoting is formed in the upper end surface thereof. The gap 13 between the first and second flat portions 1a and 2a is adjusted to be large or small so that the engagement pressure of the engagement portion F can be adjusted to a desired pressure. or,
Upper short cylinder part 7a of short cylinder body 7 protruding from the flat part of upper blade body 1
In the above, a horizontal screw hole 15 penetrating from the front outer peripheral surface to the inner peripheral surface is provided, and a small screw 16 is screwed into the screw hole 15 so that the tip end protrudes and retracts into the gap 14. The tip of the small screw 16 is brought into contact with the front peripheral surface of the upper bearing 11 by rotating
Is configured to adjust the width dimension.

With this construction, when fingers are inserted into the finger hooks 1b and 2b of the two blades 1 and 2 to open and close the blades 1 and 2 and cut the hair, the finger hooks 1b and 2b are applied to the finger hooks 1b and 2b. When the opening / closing operation is performed while applying an acting force in a direction away from the longitudinal direction of the pivot 3 (a direction in which the engaging force of the engaging portion F of the blades 1 and 2 is increased), the acting force is lower than that of the pivot 3. The upper side of the pivot 3 is urged to bend forward with the side bearing 12 as a center, but the front and rear outer peripheral surfaces of the bearing 11 fitted to the upper end of the pivot 3 and the short cylinder Since the gap 14 is provided between the body 7 and the oblong hole 8, the upper blade body 1 expands the front gap 14 with the lower bearing 12 as a fulcrum and the rear gap, in accordance with the acting force. 14 in the direction of narrowing, and without acting directly on the pivot 3 Is capable to perform the lightly opened and closed with the two blades 1, 2 3 about pivot to absorb the force acting by a gap 14 in the direction.

Similarly, the direction in which the finger hooks 1b and 2b approach each other parallel to the longitudinal direction of the pivot 3 (the meshing portion F of the two blades 1 and 2).
When the opening / closing operation is performed while applying an acting force (in such a direction as to reduce the meshing force of the shaft 3) (although such a use state hardly occurs), the acting force is applied to the upper portion of the pivot 3 around the lower bearing 12 of the pivot 3. The upper blade 1 is separated from the lower blade 2 in a direction to narrow the gap 14 on the front side, and the opening and closing operation can be performed lightly while absorbing the acting force. . However, in this case, there is a possibility that the engaging pressure of the engaging portion F of the two blades 1 and 2 may be reduced more than necessary. The engagement pressure of the engagement portion F is adjusted to a minimum pressure suitable for the user by changing the pressure, and the tip of the small screw 16 is brought into contact with the front peripheral surface of the upper bearing 11 so as not to be lower than this pressure. It is something to keep in touch. Therefore, the hairdressing operation can be performed with the minimum engagement pressure always secured without narrowing the front gap 14 as described above.

In the above embodiment, the upper blade 1
The through hole 6 provided in the flat portion 1a may be a through screw hole, and the short cylinder portion 7b in the lower half of the short cylinder 7 is screwed into this screw hole, so that the short cylinder body is inserted into the through screw hole. The structure of the short cylindrical portion 7b of the fixing member 7 is substantially the same as the fitting technology.

[0015]

As described above, according to the structure of the pivot portion of the hairdressing scissors of the present invention, the flat portions formed at the bases of the pair of upper and lower blades are rotatable by the pivot with a gap. In the hairdressing scissors pivotally attached to the lower blade body, a screw hole is provided in the flat part of the lower blade body, and a through hole having a diameter larger than the screw hole is formed in the flat part of the upper blade body. The lower half of the short cylinder formed in the through hole with the lower half formed in a circular hole and the upper half formed in the shape of an ellipse long in the length direction of the blade is fitted, and a pivot is attached to this short cylinder. The lower end screw part is screwed into the screw hole of the lower blade, and the middle part and the upper end part of the pivot are fitted into the circular hole and the elliptical hole via upper and lower bearings, respectively. Since there is a gap between the inner peripheral surface of the oblong hole and the front and rear inner peripheral surfaces, no squeak occurs because the flat portions of both blades do not slide. Not only it can be,
The opening and closing operation of the blade body can be performed lightly via the bearing.

Further, an oblong hole which is long in the longitudinal direction of the blade body is provided in the upper half portion of the short cylinder fitted into the through hole of the upper blade body, and the longitudinally inner periphery of the oblong hole is provided. Since a gap is provided between the surface and the bearing mounted on the upper end of the pivot, the direction in which the engagement pressure of the engagement portion of the two blades increases during hairdressing, that is, the two blades are brought into close contact. When it is applied to the finger ring in the direction of turning, a twisting force is generated that attempts to bend the upper end of the pivot in the front-rear direction, but the above-mentioned acting force causing this twisting force does not directly act on the pivot. The upper blade can be finely moved about the pivot axis in a direction in which the gap between the long-diameter-side front and rear inner peripheral surfaces of the oblong hole and the bearing is changed to be large or small, so that the acting force can be absorbed.
Therefore, a light opening / closing operation can always be performed according to the opening / closing operation state of the upper and lower blades which differs depending on the user, so that the hairdressing operation can be performed efficiently.

In the upper half portion of the short cylinder, a small screw is threaded from the front outer peripheral surface into the gap, and the tip of the small screw is brought into contact with the front peripheral surface of the upper bearing. Even during use, it is possible to reliably prevent the engaging pressure of the engaging portion of the two blades 1 and 2 from unnecessarily decreasing, and it is possible to cut the hair smoothly.

[Brief description of the drawings]

FIG. 1 is a simplified plan view of a hairdressing scissor having a structure of a pivot portion according to the present invention;

FIG. 2 is an enlarged longitudinal side view of the pivot structure.

FIG. 3 is a cross-sectional view of the short cylinder portion,

FIG. 4 is a simplified side view of conventional hairdressing scissors.

[Explanation of symbols]

 1, 2 Upper and lower blades, 1a, 2a Flat part 3 Axis 3a Screw part 4 Screw hole 6 Through hole 7 Short cylinder 8 Oval hole 9 Circular hole 11, 12 Bearing 13, 14 Clearance

Claims (2)

(57) [Claims] 1. A hairdressing scissor comprising a pair of upper and lower blades formed at the bases of a pair of upper and lower blades so as to be rotatable by a pivot with a gap therebetween. While a screw hole is provided, a through hole having a diameter larger than that of the screw hole is formed in a flat portion of the upper blade body, a lower half of the through hole is formed as a circular hole, and an upper half is formed of the blade body. The lower half portion of a short cylinder formed into a long oval shape in the vertical direction is fitted, a pivot is inserted into the short cylinder, and a lower end screw portion is screwed into a screw hole of the lower blade, and The middle part and the upper end part of the pivot are fitted in the circular hole and the oval hole via upper and lower bearings, respectively, so that a gap is provided between the upper bearing and the front and rear inner peripheral surfaces on the long diameter side of the oval hole. The structure of the pivot portion in the hairdressing scissors, characterized in that: 2. A hair clipping scissor according to claim 1, wherein a gap adjusting small screw projecting from said front outer peripheral surface into said gap is threaded through an upper half portion of said short cylindrical body. Structure of the wearing part.