A switch assembly is provided to adjust a moving distance of operating knob under a state of fixing a moving distance of movable part by connecting the operating knob with a circuit switch module by a connection member and connecting the operating knob with the connection member by a power transmission member such as a driving gear and a passive gear. In a switch assembly, an operating member(20) is rotatably installed on a base(10). A connection member(30) rotatably installed on the base(10) rotates by a certain revolution ratio with the operating member(20) by being linked with the operating member. A circuit switch module(40) generates a specified signal according to a revolution of the connection member(30).
