JPH0733258U - Equiangular slide scissors - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide scissors that keeps the angle of a sharp blade constant by making one of the blades a certain curve and smoothes the work. [Structure] It is composed of a straight blade and a blade that draws a certain curve so as to form a certain angle with respect to it. Further, by deriving the curve, the fulcrum of the blade of the scissors is naturally determined as one point.

Description

[Detailed description of the device]

 (In the following text, "scissors" include all blades that mean "a tool that cuts an object by sandwiching it with two blades", that is, a cutter and the like.)

[01]

[About this plan]

 This invention relates to scissors having one blade curved.

[02]

[Problems with conventional tools]

 Conventional scissors cut an object by sandwiching it with two straight blades, so two blades are created when the blade is wide open and when the blade is opened slightly. The angle changed, so the amount of force and sharpness when cutting were not constant. (Although a product with some curvature to the blade to try to solve the problem to some extent has been made, its drawbacks are not completely eliminated as in the case of this plan.) Was devised to eliminate the.

[03]

[Means to solve the problem]

 This will be described below with reference to the drawings. As shown in FIG. 1, a tangent line is drawn on the small circle A. At that time, the length of the tangent line is set to be constant from the contact point (79 mm in the case of this figure), and the distance between the ends of the adjacent tangent lines (opposite to the contact point) is also constant. Draw a tangent line to determine (1.2 mm in the case of this figure). A special curve can be obtained by drawing lines at fixed angles so that the tangents drawn as described above are connected in order. If you make scissors using a blade with this curve, you can hit the cut object at a certain angle no matter which part of the open blade you cut, so the force and sharpness when cutting will be constant. Will become. That is equivalent to the blade sliding at an equal angle. However, in making this scissors, the fulcrum of the blade must be at the center of the small circle A described above. Even if a point other than this point is used as a fulcrum, the effect to be obtained does not appear properly. In other words, one of the features to be noted in making the scissors of the present invention is that one of the blades has a special curved line, and in order to use the blade effectively, the fulcrum of the scissors is determined to be a certain point. is there.

[04]

[Effect of device]

 With conventional scissors, the sharpness of the two blades would inevitably change at the part where the angle was large or small, but using this plan, the blade slides at the sharpest angle. Therefore, the sharpness does not change regardless of which part you cut, and you can work smoothly.

[Brief description of drawings]

Figure 2 shows an example of the blade design. FIG. 3 is a schematic view of the present invention.

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[Procedure amendment]

[Submission date] September 27, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Added

[Correction content]

[Brief description of drawings]

FIG. 1 is a diagram showing a method of designing a curved blade of the present invention.

FIG. 2 is a design example of a curved blade of the present invention.

FIG. 3 is a schematic illustration of the present invention.

Claims (2)

[Scope of utility model registration request] 1. Scissors in which one of two blades is curved 2. A cutter having one of two blades formed into a curved line.