Patent ID: 7845078

Claim:
A rotary electric shaver comprising a plurality of outer cutters mutually deployed concentrically and a plurality of inner cutters that rotate while sliding said outer cutters from below, the rotary shaver comprising: an outside outer cutter and an inside outer cutter provided coaxially and capable of moving up and down, independently of each other; a drive shaft that is rotationally driven by an electric motor and to which an upward return tendency is imparted; an outside inner cutter guide that engages said drive shaft and rotates integrally with said drive shaft; an outside inner cutter that is secured to said outside inner cutter guide and slides against said outside outer cutter from below; an inside inner cutter guide that engages said outside inner cutter guide from above so as to be able to move up and down and that rotates together with said outside inner cutter guide; an inside inner cutter that is secured to said inside inner cutter guide and slides against said inside outer cutter from below; and an upward-pushing spring that is provided between an upper surface of, said outside inner cutter guide and a lower surface of said inside inner cutter guide thus urging said inside inner cutter guide upward; and wherein: the outside outer cutter is such that the outer circumference thereof is held, so that it is moveable downwardly, in an outer cutter case; the inside outer cutter is such that the outer circumference thereof is held, so that it can move downwardly, in the inner circumference of said outside outer cutter; a plurality of slits are formed, so as to open downward, in the inner circumference of the outside outer cutter; a plurality of pawls for engaging these slits are formed, protruding in the outer circumferential direction, in the outer circumference of the inside outer cutter; and the inner circumferential lower edge of said outside outer cutter, when said pawls engage into said slits, is secured in the circumferential direction by an anti-vibration ring.