Patent ID: 7743508

Claim:
A rotary electric shaver comprising a cutter unit for holding a substantially disc-shaped outer cutter provided in an outer cutter frame mounted on an upper part of a shaver main body housing therein a motor and for pressing an inner cutter elastically toward the outer cutter with a drive shaft which is rotationally driven by said motor and rotationally drives said inner cutter mounted from below on the inside of said outer cutter; said electric saver further comprising: a swivel case to which said outer cutter is secured, said swivel case swiveling and movable up and down integrally with said outer cutter; a movable panel for pushing said swivel case upward with a return spring in between; and a push-up mechanism for changing a height level of said movable panel; and wherein: a push-up force on said outer cutter is made controllable by changing a height level of said movable panel by said push-up mechanism; and said cutter unit comprises: a cutter receiving base, held in said outer cutter frame, coaxially penetrated through by said drive shaft; a swivel case holder held so as to be movable up and down within a predetermined range in said cutter receiving base, said swivel case holder having swivel case supporting portions positioned on a curved surface which opens upward from below said outer cutter; a substantially bowl-shaped swivel case enclosing a lower portion of said inner cutter and being held by said swivel case holder so as to slide on said swivel case supporting portions of said swivel case holder and swivel in any direction; an outer cutter ring secured so as to be detachable to an upper edge of said swivel case, thus securing an outer edge of said outer cutter to said upper edge of said swivel case; and a return spring provided between said swivel case and said movable panel which is held so as to be movable up and down in said cutter receiving base thus for returning said swivel case to a positioned coaxial with said drive shaft; and wherein said swivel case is provided to swivel together with said outer cutter by allowing said swivel case to slide on said swivel case supporting portions of said swivel case holder, and said swivel case is provided to be movable up and down together with said swivel case holder.