JP2014113204A5 - - Google Patents

Description

A head portion 58 is detachably attached to the upper portion of the case 54. The head portion 58 is inclined with respect to the grip portion 52 of the case 54 so that the shaving surface (the upper surface of a blade frame 60 described later) is directed obliquely upward. The electric motor has a rotation output shaft protruding from the upper surface of the case 54 toward the inside of the head portion 58, and rotationally drives the inner blade 12A. The contact pressure with respect to the lower surface of the shaving surface 1 6 A, 18 A of 24A is properly maintained.

Claims (8)

An outer blade having an annular shaving surface on the upper surface formed with a number of screed entrances, and an inner blade having a small blade that rotates while sliding on the lower surface of the outer blade from below the shaving surface The outer blade is integrally formed with a plurality of concentric annular shaving surfaces, and at least one of the annular shaving surfaces is formed with a round hole-shaped advance entrance. A manufacturing method of an outer blade,
(A) A step of grinding or polishing a predetermined position where the round hole-shaped striking entrance is formed on the annular shaving surface so as to have a thickness dimension smaller than the inner diameter dimension of the round hole. ;
(B) A step of forming the round hole-like striking inlet by pressing at a position where the grinding or polishing is performed after the step (a);
The manufacturing method of the outer blade of a rotary electric shaver characterized by the above-mentioned.   In the step (b), the circular hole-shaped advancement entrance is formed in a zigzag pattern in which inner and outer circular holes are alternately arranged along the circumferential direction of the annular shaving surface. 2. The method for producing an outer blade of a rotary electric shaver according to claim 1, wherein the outer blade is a step of forming the same.   In the step (b), a plurality of round holes arranged on one of the inner peripheral side and the outer peripheral side are pressed by a single press, and then placed on the other of the inner peripheral side and the outer peripheral side. 3. The method for manufacturing an outer blade of a rotary electric shaver according to claim 2, wherein the round hole is a step of pressing by a single press. (C) After the step (b), a step of forming a slit-like striking inlet at a predetermined position of the annular shaving surface by grinding;
Production method of the outer cutter of the rotary electric shaver of any one of claims 1 to 3, characterized in that it comprises.   Before the step (b), the method includes a step of forming a position mark at a predetermined position of the outer blade, and the step (b) and the step (c) are performed using the position mark as a common processing reference position. 5. The method of manufacturing an outer blade of a rotary electric shaver according to claim 4, wherein processing in the process is performed.   The said position mark is a D-cut part formed in the outer periphery of the said outer blade, The manufacturing method of the outer blade of the rotary electric shaver of Claim 5 characterized by the above-mentioned. By performing the step (b) and the step (c), a predetermined number of round hole forming regions each including a predetermined number of the circular hole-shaped striking inlets along the circumferential direction on the predetermined annular shaving surface. 5. The round hole-like striking inlet and the slit-like striking inlet are formed so as to be alternately arranged with slit-forming regions composed of the slit-like striking inlets. The manufacturing method of the outer blade of the rotary electric shaver as described in any one of -6.   The method for manufacturing an outer blade of a rotary electric shaver according to any one of claims 1 to 7, wherein the round hole-shaped screed inlet is formed on the annular shaving surface other than the outermost periphery.