Push-rotation type key switch device

Claim 1

A push-rotation type key switch device, comprising: a lock main body having front and rear portions and a rotor rotatable in the body and not capable of sliding in an axial direction therein; said rotor containing follower and driving pins stored in pin receiving holes in the rotor; a switch fitted to the rear portion of said lock main body, said switch being fixed between a fitting base plate and a rear seat plate of said main lock body and having an actuator; a switch operating cam located at the rear end of said rotor, said cam being equipped with a split groove having an interlocking plate inserted and fixed therein in the axial direction of the cam, and wherein said cam has a cylindrical form equipped on its peripheral side sufrace with a cam protuberance, said cam having a compression spring and ball incorporated at its rear end which urge the cam in a forward direction toward said rotor and being caused to slide backward in the axial direction of said rotor when a key is inserted into said rotor; an auxialiary cam rotatably fitted to said switch operating cam, a leaf spring means fixed to said auxiliary cam, and a compression spring provided between said switch operating cam and said auxiliary cam; and a twist coil spring provided with said auxiliary cam in pressure contact with said rear seat plate, whereby said cams are rotated by the key integrally with said rotor in a direction to turn on said switch.