Patent ID: 7829811

Claim:
A rotary switch comprising: a housing having a cylindrical shape with a ring-shaped outer wall, a ring shaped inner wall provided along an opening of an insertion hole and an annular bottom wall such that an annular recess is provided between the outer wall and the inner wall; a rotor which is rotatably supported on the housing around a central axis of the annular recess; a plurality of stationary contacts each having a flat circular arc shape and provided on a bottom surface of the annular recess at a same radial distance along an inner face of the outer wall of the housing; and a moving contact which is provided on the rotor and is connected with and disconnected from the stationary contacts in accordance with rotation of the rotor with respect to the housing, wherein at least one of said plurality of stationary contacts have a cutout of a rectangular shape located at a corner between an end face of the stationary contact that faces another stationary contact and an outer periphery of the stationary contact that faces the inner surface of the outer wall of the housing so that a creeping distance along the inner surface of the outer wall of the housing is maintained as a predetermined distance.