Rotator blade and small electric instrument having rotator blade

Abstract

The present invention provides a rotary blade and a small electric instrument having the rotator blade, wherein the rotator blade which can effectively introduce and efficiently cut off the beard and has easy cleaning of flock is provided. The rotator blade which comprises a blade body and a blade bracket that supports the blade body is composed. Etching treatment is performed for stainless steel plate thereby forming a group of rib-shaped small cutting edge and a group of cutting blade holes in the blade body. A plurality of blade bodies are fixed on a circumferential surface of the blade bracket and the rotator blade is composed to a cylinder shape. Each small cutting edge is provided with the following components: a cutting surface of an external surface; a non-cutting surface of an inner surface; a side edge part for connecting the cutting surface with the non-cutting surface; a cutting edge which is formed at an upstream side in a rotation direction of the cutting surface; and a back clearance surface edge which is formed at the downstream side in the rotation direction of the cutting surface. A width center of the non-cutting surface deviates from a width center of the cutting surface to the downstream side of the rotation direction. A cutting edge angle of the cutting edge, which is smaller than an edge angle of the back clearance surface edge, is formed.

Description

technical field [0001] The present invention relates to a rotary head used for a rotary electric razor, a hair remover, etc., and a small electric appliance equipped with the rotary head. The cutter head main body constituting the inner cutter head is formed by etching, electroforming, and press processing. Background technique [0002] The inner cutter head (rotary cutter head) in a general rotary electric razor includes more than a dozen helical cutter heads, a circular shaft-shaped inner cutter head support body formed by plastic, and a metallic one embedded in the inner cutter head support body. Inner cutter shaft (Patent Document 1). The helical cutter head is inserted and fixed when the inner cutter head support body is formed, so that it is integrated with the inner cutter head support body. The formed helical bit is ground to form a cutting edge at the tip of the bit. Since the cutting blades are continuous in a spiral shape, it is possible to break the hairs that...

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Problems solved by technology

However, in the process of bending the electroformed master mold into a cylindrical shape, there is a concern that cracks may occur in the electrical insulating film, which may deteriorate the yield when manufacturing the inner blade.

In addition, similarly to the inner bit of Patent Document 2, there is a problem that the angle of the cutting edge is large, and it is difficult to exhibit sharp cutting performance.

[0013] As mentioned above, although the conventional inner cutter head with the inner cutter body formed by the etching method or the electroforming method as the cutting element is simpler in structure than the inner cutter head with the spiral cutter head as the cutting element, it is difficult to obtain a good yield in the case of low yield. There is still room for improvement in the aspect where it is difficult to sharpen the cutting edge

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