JPH05200165A - Scissors - Google Patents

Abstract

PURPOSE:To achieve a longer life of scissors with higher cutting performance by arranging a ball or a ball bearing at a pivot part where mobile and fixed blades are screwed down with the bearing as contact point of both the blades to make the scissors move light. CONSTITUTION:Mobile and fixed blades 2 and 3 composing scissors 1 are pierced by a thread through a thread hole 4 and clamped with a nut 6 to join. The thread hole 4 and the thread 5 form a pivot part of both the blades 2 and 3 and both the blades 2 and 3 turn centered on the pivot part by pushng a grip of the scissors 1 to open. A shallow groove 6 is provided at parts facing in contact with each other in the perimeter of the thread hole 4 of both the blades 2 and 3 and a ball or a ball bearing 7 is arranged in the groove 6 to contact the bottom surface of the groove 6. Thus, this contact point acts just as the contact point in the past does and becomes a base point for the action of leverage of the mobile blade 2 for the fixed blade 3 to decide the strength of rubbing between parts having the two blades 2 and 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to scissors suitable for beauty treatment, in which a contact point is provided on a pivotal portion for screwing a moving blade and a stationary blade.

[0002]

2. Description of the Related Art Scissors have a moving blade and a stationary blade which move their contact points with each other by pushing and opening a handle portion with a fingertip. Both blades have blades on their side edges, but this blade
The contact strength of the contact points is determined by the contact of the contact points provided in a relationship facing the handle portion side from the pivotal attachment portion for screwing the moving blade and the stationary blade.

The sharpness of the scissors is determined by the degree of attachment of the blades provided on the side edges of the moving blade and the stationary blade and the degree of contact at the contact point. That is, when the contact point of the moving blade with respect to the stationary blade around the contact point moves, the blades cross each other and cut the hair. When the blade loses its sharpness, the blade is re-sharpened and the blade is attached again, but the abrasion of the contact point makes the scissors loose and makes it difficult to continue the use. Because of this, wear of the tactile points,
I hoped to deal with wear and tear.

One of the countermeasures against this is Japanese Patent Publication No. 57-5051.
No. 7 publication. The feature of the measure disclosed in this publication is that the contact point between the moving blade and the stationary blade on the handle side is eliminated, and a portion having the same function as this contact point is provided around the pivot portion. is there. As a concrete configuration of this countermeasure, a pair of circular taper members are opposed to each other through a circular plate, and a contact point of the tapered surface to the circular plate is used as a contact point.

[0005]

In the means using the pair of circular taper members described above, the biting of the pair of circular members into the circular plate is large due to the tightening of the screws, and the movement depending on the fine adjustment of the tightening of the screws is required. There is no change in the contact force between the blade and the stationary blade, making a large adjustment. Such a large adjustment is not preferable for a barber who performs a professional work, and improvement is desired, and development of finely adjustable scissors is desired. Therefore, it is an object of the present invention to solve the above-mentioned problems of the prior art.

[0006]

In order to solve the above-mentioned problems, the present invention uses means for providing a ball or roller bearing at the pivotal joint between the moving blade and the stationary blade and making this bearing a contact point. . Preferably, the bearing is provided in a groove around the screw hole of the pivot portion, and the cutting edge side of this groove is deep. Both the moving blade and the stationary blade may be replaceable blades.

[0007]

The ball or roller bearing acts as a contact point, but the contact between the bearing and the two blades is not a surface contact but a point or line contact.
Excellent durability and longer scissors life. Furthermore, by making the hardness of both blades higher than the hardness of the balls and rollers of the bearing, only the bearing can be replaced when worn. The use of the bearing moves the moving blade with a small force to enable cutting.

[0008]

EXAMPLE A moving blade 2 and a stationary blade 3 which compose the scissors 1 are joined by passing a screw 5 through a screw hole 4 and tightening a nut 6. The screw holes 4 and the screws 5 form a pivotally-attached portion for the blades 2 and 3, and the handle portions of the scissors 1 are pushed and opened to rotate the blades 2 and 3 about this pivotal portion. For example, if you push the handles closer to each other,
The bladed portion of 3 changes the contact point from the pivotally attached portion side to the blade tip side, and the shearing force at this time cuts hair and the like.

A shallow groove 6 is provided around the screw hole 4 of each of the blades 2 and 3 and in a portion facing each other. Balls or roller bearings 7 are arranged in the opposing grooves 6. Each ball or roller of the bearing 7 is brought into line contact with the bottom surface of the groove 6 formed in the two blades 2, 3. This contact point serves as a base point of the lever action of the moving blade 2 with respect to the stationary blade 3 by performing the same function as that of the conventional touch point.
Determine the rubbing strength of the part with the 3rd blade.

The groove 6 has a portion a on the cutting edge side and a portion b on the pivot side.
And, preferably, the depth of the relationship of a> b. This causes the lever to function with the portion b as a fulcrum, improving the sharpness of the scissors. The hardness of the balls and rollers of the bearing 7 is made smaller than the hardness of the double-edged blades 2 and 3 to suppress the wear of the double-edged blades 2 and 3. As the material of the balls and the rollers, any of metal, ceramic, resin and the like can be used. By replacing the bearing 7 when the bearing 7 is worn, the life of the scissors 1 can be extended.

[0011]

[Effects] The scissors according to the present invention use balls or roller bearings as the portions that act as contact points, so that the movement of the scissors can be lightened and the sharpness can be improved. Moreover, since the bearings can be repaired to repair the contact point, the scissors can have a longer life.

[Brief description of drawings]

FIG. 1 is a plan view of scissors blades.

FIG. 2 is a detailed view of a mounting portion of a bearing.

FIG. 3 is a side view showing an example in which a moving blade and a stationary blade of scissors are pivotally attached.

[Explanation of symbols]

 1 scissors 2, 3 blade 4 screw hole 5 screw 6 groove 7 ball or roller bearing

Claims (3)

[Claims] 1. A scissors having a ball or roller bearing at a pivotally connecting portion for screwing a moving blade and a stationary blade, and using the bearing as a contact point of both blades. 2. The scissors according to claim 1, wherein a bearing groove is provided around the screw hole and on the opposing surfaces of both blades, and the groove is deep on the blade edge side. 3. The scissors according to claim 1, wherein a replaceable blade is possible.