US Patent 9808943 Electric shaver and its head

Head (30) of electric shaver (1) includes blade unit (40), head case (31) supporting blade unit (40), and rotary member (80) rotatably supported by head case (31). Blade unit (40) includes outer blades (51 and 61) that contact with a target area and inner blades (52 and 62) provided corresponding to outer blades (51 and 61) and configured to make a reciprocating move relative to outer blades (51 and 61). Blade unit (40) and rotary member (80) are coupled so as to move together relative to head case (31) in a height direction of head case (31). This embodiment enables the head of the electric shaver to move smoothly on the skin.