JPH073569U - Scissors - Google Patents

Abstract

(57) [Summary] [Purpose] Scissors that make it easy to cut hair. [Structure] Scissors in which the cutting edge curves back in the same direction in an arc shape.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention particularly relates to scissors used by professionals such as hairdressers.

[0002]

[Prior art]

 Conventional scissors blades are either straight blade type with straight blades for both moving and static blades, or both are blade type with a bulged central part.

[0003]

[Problems to be solved by the device]

 Conventional scissors have a cutting edge shape that is fixed or flake-shaped, such as paper, which is easy to cut and easy to cut, but for those that are easy to pinch and escape like hair, The shape of the cutting edge is unsuitable, and even if it is cut off, the hair is cut while escaping, so that it has the drawback that it cannot be cut straight into the desired straight line, which is a great drawback for hair cutting.

[0004]

[Means for Solving the Problems]

 In view of this, the present invention makes the blade edges of the moving blade and the stationary blade both curl back in the same direction in an arc shape, so that even if the blades are easy to escape like hair when cutting when the two blades are engaged, the curl blade I made it possible to disconnect without losing it. As a result, even hair can be cut in a desired straight line.

When cutting with a blade, it is desirable that the blade tip makes contact with the object while pulling it, so that the moving blade is preferably formed into an arc, and with scissors, this moving blade is As a result of experiments, it has been found that it is preferable that the stationary blade for receiving is curved inward in an inward arc shape in order to prevent the escape, especially for objects that easily escape, such as hair.

For the above-mentioned reason, the present invention makes the opposing cutting edge lines in which the moving blade and the stationary blade mesh with each other bulge in an outer arc shape with respect to the other, or have an inner arc shape so that the other is received by the other. It was formed.

Experiments have revealed that the radius of the arc is 71.65 cm when the arc length is 50 cm, which is desirable for cutting the hair straightly without escaping.

[0008]

【Example】

 A description will be given according to the embodiment shown in the drawing.

In the scissors, the moving blade 1 and the stationary blade 2 are axially mounted at the center (the shaft mounting portion 3), the end of the moving blade 1 on the side opposite to the blade portion 1a serves as the thumb insertion portion 4, and the blade of the stationary blade 2 is provided. An index finger insertion portion 5 is provided at the end opposite to the portion 2a.

The cutting edge line A of the blade portion 1 a of the moving blade 1 has an outer arc shape that swells from the tip to the shaft mounting portion 3. The blade edge line B of the blade portion 2a of the stationary blade 2 is a so-called loose blade in which a concave inner arc is formed from the tip to the shaft bearing portion 3.

In the present invention in which the hair 6 is cut by the cutting edge, the hair 6 is cut without escaping between the cutting edges of the moving blade and the stationary blade, that is, the hair 6 is not slid in the tip direction of the blade portion, and thus the desired cutting Hair can be cut along the lines (Fig. 2).

Further, the degree of curve of the arc of the cutting edge line is such that when the length of the cutting edge line (this length) is 50 cm, the angle α between the tangent line T of the center P of the arc L and the ends M and N of the arc is α. As a result of experiments, it was found out that the range of 10 ° or less, that is, the central angle θ of 40 ° or more is desirable in order to prevent the hair from escaping during cutting and to obtain a desired cutting line. This means that when the length of the arc is 50 cm, the radius of the circle containing this arc is θ L = r ······ π 180 about 71.65 cm from the relation of the radian method. Therefore, it is desirable that it is an arc of a circle having a radius larger than this.

On the other hand, in the conventional blades of the moving blade and the stationary blade, which have a bulged blade edge, or the straight-shaped scissors, which have a straight line, a desired point is set as shown in FIG. It is cut like a cut line C shown by a diagonal dotted line different from the ideal cut line shown by a chain line. Therefore, conventional cutting by a hairdresser requires a technique that requires a prospective cut such as anticipating this diagonal cut and making a diagonal cut in advance.

[0014]

[Effect of device]

 According to the scissors of the present invention, the hair can be cut at a desired cutting line, and the hair can be cut well. It is easier to cut than before, and it can be cut smoothly without applying force, making it easier to cut.

[Brief description of drawings]

[Fig. 1] Scissors of the present invention

FIG. 2 shows the cutting state of hair by the scissors of the present invention.

FIG. 3 shows the degree of curve of an arc

FIG. 4 shows how hair is cut with conventional scissors.

[Explanation of symbols]

 1 Moving blade 2 Static blade 3 Shaft attachment part 4, 5 Finger insertion part 6 Hair

Claims (3)

[Scope of utility model registration request] 1. Scissors in which the blade edges of the moving blade and the stationary blade are bent back in the same direction in an inner arc shape. 2. A scissors in which one of the cutting edge lines of the moving blade and the stationary blade is a straight line, and the other cutting edge line is bent back in an inward arc shape. 3. The scissors according to claim 1, wherein the radius of the arc of the cutting edge line is 70 cm or more.