Patent ID: 7487592

Claim:
An electric rotary shaver comprising: a shaver main body that contains a motor, two outer cutters provided in a cutter frame which is mounted on said shaver main body, two inner cutters provided inside of said cutter frame, and two drive shafts that protrude from said shaver main body and are rotationally driven by said motor while elastically pressing each of said two inner cutters respectively against a corresponding one of said two outer cutters; said electric shaver further comprising: an outer cutter holder which is provided inside of said cutter frame and holds said two outer cutters; an inner cutter holder which is formed with a plurality of projections that pass through said outer cutter holder and press against outer circumferential edges of said two outer cutters, said inner cutter holder holding said two inner cutters so that said two inner cutters are free to rotate; a shaft member which passes through said inner cutter holder and said outer cutter holder with a tip end of said shaft member being positioned in said cutter frame so as to be located between mutually adjacent said two outer cutters; and a cutter retaining assembly through which said shaft member passes, said cutter retaining assembly being detachably anchored to said cutter frame and elastically pressing said inner cutter holder toward said two outer cutters; and wherein said tip end of said shaft member is positioned on an imaginary straight line that connects centers of said two outer cutters; and said cutter retaining assembly comprises: a locking member which is provided on said shaft member and is prevented from slipping off of said shaft member, said locking member being formed with a plurality of arm portions that extend radially outward, and a compression coil spring which is mounted on said locking member and presses said inner cutter holder toward said outer cutters; and wherein distal ends of said arm portions are engageable with inside walls of said cutter frame.