Electric rotary shaver

An electric rotary shaver comprising:

• a cutter frame provided with outer cutter holes, and
• outer cutters each of which being fitted in each of said outer cutter holes so as to be supported and movable in an axial direction thereof and tiltable in any desired direction with inner cutters provided between said outer cutters and inner cutter drive shafts, said drive shafts being urged toward outside in an axial direction thereof for biasing said inner cutters into contact with said outer cutters;
• wherein
• outer surfaces of said outer cutters and inner surfaces of said outer cutter holes are formed so as to make a sliding contact, thus supporting said outer cutters to tilt in any desired direction in said outer cutter holes;
• said outer cutters make said sliding contact with said inner surfaces of said outer cutter holes so that the outer cutters can move in an axial direction while always maintaining sliding contact with said inner surface of said outer cutter holes;
• and
• said outer surfaces of said outer cutters are formed in a spherical surface shape that protrudes outward and said inner surfaces of said outer cutter holes comprise a pair of opposing spherical surfaces at each end of said outer cutter holes with a cylindrical surface provided between said pair of opposing spherical surfaces.