JPH11244551A - Scissors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the optimum fitting condition of a pair of cutting edges for a long period. SOLUTION: In the scissors where a sliding ring 6 is mounted in a recessed void 5 formed on one 1 of cutting edges for fitting a pivotal screw 3 therein, the sliding ring 6 is made of an elastic material such as a rubber material and a synthetic resin material, and an upper face side 6a of the sliding ring 6 comprises an almost cone-shaped inclined-face 61 almost fittable to a head lower face 31a of the pivotal screw 3. A dot or ring-shaped projection is preferably formed on a lower face side of the sliding ring 6. Whereby the excess elastic deformation of the sliding ring 6 can be prevented, and the sliding ring 6 can execise the proper elastic force for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to scissors used for hairdressing, beauty and the like, and more particularly, to a pair of two blades, each of which is provided with a recess for recessing a lower surface of a head of a screw required. The present invention relates to scissors in which a sliding ring is provided in a recess to bring the lower surface of a screw required into sliding contact.

[0002]

2. Description of the Related Art A sliding ring used in conventional scissors of this type is punched out in a substantially donut shape using a thin flat plate of 0.1 mm to 0.5 mm made of rubber, plastic, metal or the like. Had formed. Therefore, since the upper and lower surfaces of the sliding ring are naturally flat surfaces, a concave portion formed on one side of the blade body (the concave portion is formed in a substantially inverted truncated conical shape). When the slide ring is installed in the mortar and the screw is tightened, the upper surface of the slide ring comes into contact with the lower surface of the screw head. Elastically deforms into a substantially disc spring shape. The degree of rubbing of the pair of blades is maintained by the restoring elastic force of the sliding ring elastically deformed into a substantially disk spring shape. The rubbing condition of the body lasted only for a short period of time, and each time, there was a problem that the screw needed to be tightened and used little by little.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and maintains an optimal rubbing state (rubbing state) of a pair of blades for a long period of time. It is intended to provide scissors that can do it.

[0004]

The scissors of the present invention for achieving the above object have a recess formed in one of a pair of blades, into which the lower surface of the head of the screw required is immersed. In the scissors provided with a sliding ring for bringing the lower surface of the head of the screw into sliding contact with the screw, the sliding ring is formed of an elastic material such as a rubber material or a synthetic resin material. A substantially mortar-shaped inclined surface substantially matching the lower surface of the head of the screw required is formed on the upper surface side of the ring. At this time, it is preferable to form a dot-like or ring-like projection on the lower surface side of the sliding ring.

[0005]

When the slide ring is set in the recess formed in one of the blades and the screws are tightened, the lower surface of the screw formed into a substantially inverted frustoconical shape has the lower surface of the slide ring. It almost fits into the substantially mortar-shaped inclined surface formed on the upper surface side and comes into sliding contact,
As a result, the sliding ring does not undergo excessive elastic deformation, and the sliding ring maintains an appropriate elastic force for a long period of time.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, A shows one embodiment of the scissors according to the present invention.

As shown in FIG. 1, basically, the scissors A pivotally open and close fulcrum portions of a pair of blades composed of a pair of a stationary blade 1 and a moving blade 2 with a screw 3 as in the prior art. Pivotally attached to both blades 1,
The finger rings 1b and 2b for inserting fingers are formed in the same body at the base ends of the handle portions 1a and 2a, respectively, and one or both of the finger rings 1b and 2b (other than the thumb in the illustrated example). A finger ring 4 is formed on the finger ring 1b) on the stationary blade body 1 side into which a finger is inserted.

As shown in FIG. 2, the screw 3 is inserted into a recess 5 formed on one of the blades 1 and 2 (on the side of the stationary blade 1 in the illustrated example). Lower surface 31a of head 31
And the screw portion 32 is screwed to the other blade body side (the moving blade body 2 side in the illustrated example) and attached. At this time, the sliding ring 6 is set in the recess 5 and the lower surface 31a of the head of the screw 3 is brought into sliding contact with the upper surface 6a of the sliding ring 6.

Conventionally, the concave portion 5 is formed in a substantially mortar shape so that the bottom portion thereof is formed in a substantially inverted truncated conical shape in accordance with the lower surface 31a of the head portion of the screw 3 required. In this case, the bottom 5a is formed in a flat and substantially concave shape, and the sliding ring 6 is installed in the concave 5 so that the lower surface 31a of the head of the screw 3 is brought into sliding contact with the upper surface 6a of the sliding ring 6. . By forming the recess 5 in a substantially concave shape with a flat bottom surface 5a, the processing can be facilitated and cost reduction can be expected, and the sliding ring 6 can be stably installed. Will be able to do it.

The sliding ring 6 is made of a material having elasticity, preferably a material having a small coefficient of friction or a material having soft elasticity capable of lowering the coefficient of friction by using a lubricant, such as natural rubber or polyurethane. Using synthetic rubber material such as rubber or plastic material such as fluororesin,
The concave portion 5 formed in the blade body 1 is formed into a substantially donut shape in plan view having a size corresponding to the inner diameter and the depth of the concave portion 5, and the upper surface side 6 a in sliding contact with the lower surface 31 a of the head of the ring 3 is required. The screw 3 has a substantially mortar-shaped inclined surface 61 substantially conforming to the outer shape of the lower surface 31a of the head of the screw 3.

The sliding ring 6 can be easily formed using a molding die. The size of the sliding ring 6 varies depending on the size of the scissors A to be used. It is formed to a thickness of about 0.5 mm to 3 mm.

The lower surface 6b of the sliding ring 6 may be formed flat, but it is preferable to form a dot-shaped or ring-shaped projection 62 having an appropriate height. Incidentally, in the embodiment shown in FIGS. 2 and 3, a ring-shaped projection 62 having a height of about 0.3 mm is formed on the entire lower surface 6b of the sliding ring 6. In the case where the projections 62 are formed in a dot shape, as shown in FIG.
b. A plurality is formed so as to be arranged evenly over the entirety.

[0013]

In the scissors according to the present invention, the sliding ring is formed of an elastic material such as a rubber material or a synthetic resin material, and the upper surface of the sliding ring is provided with a lower portion of a screw head. Since it forms a roughly mortar-shaped inclined surface that almost matches with
When the slide ring is installed in the concave recess formed on one of the blades and the required screw is tightened, the lower surface of the screw required in the shape of a substantially inverted truncated cone is placed on the upper side of the slide ring. The sliding ring does not cause excessive elastic deformation, so that the sliding ring substantially contacts the formed substantially mortar-shaped inclined surface and is in contact with the sliding contact.
It is possible for the sliding ring to continue exerting an appropriate elastic force for a long time. As a result, the optimum rubbing state (rubbing degree) of the pair of blades can be maintained for a long period of time. Incidentally, according to the results of the experiment, the optimum rubbing state (the degree of rubbing) of the blade body could be maintained for one month or more.

According to the scissors of the present invention, a point-like or ring-like projection is formed on the lower surface of the sliding ring. The elastic displacement amount becomes larger as compared with the case where is formed flat, so that the adjustment range of the degree of rubbing of the blade body by tightening the screws required can be increased.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the main part.

FIG. 3 is an enlarged sectional view showing an example of the embodiment of the sliding ring according to the present invention.

4A and 4B are perspective views each showing an embodiment of the sliding ring according to the present invention.

[Explanation of symbols]

A ………… Scissors 1 ……………
Blade body (static blade body) 2 ………… Blade body (moving blade body) 3 …………
Screw required 4 ……… Finger hook 5 ……………
Recess 6 ………… Sliding ring 6a …………
Upper surface side 6b Lower surface side 61
Mortar-shaped inclined surface 62 ...... Projection

Claims (2)

[Claims] 1. A sliding member for forming a recess in one of a pair of blades into which the lower surface of the head of a screw is immersed, and for bringing the lower surface of the head of the screw into sliding contact in the concave. In the scissors provided with a ring, the sliding ring is formed of an elastic material such as a rubber material or a synthetic resin material, and the upper surface side of the sliding ring substantially matches the lower surface of the head of the screw required. Scissors characterized by forming a substantially mortar-shaped inclined surface. 2. The scissors according to claim 1, wherein point-like or ring-like projections are formed on the lower surface side of said sliding ring.