초록 ▼

A key switch includes a cam member rotating in accordance with the insertion-and-pull of a key to be inserted into a key insertion opening, a plunger coming into contact with a circumferential cam side of the cam member, a switch mechanism actuated by the plunger which is displaced in accordance wit

A key switch includes a cam member rotating in accordance with the insertion-and-pull of a key to be inserted into a key insertion opening, a plunger coming into contact with a circumferential cam side of the cam member, a switch mechanism actuated by the plunger which is displaced in accordance with the rotation of the cam member, and a rotation lock mechanism for locking the rotation of the cam member when the key is pulled, in which the rotation lock mechanism including a locking member which can be displaced in the direction parallel to a vertical rotation face on the rotation axis of the cam member and a spring urging the locking member toward a position to be engaged with the cam member, and the locking member being disposed to be displaced to a lock release position by contacting the key resisting the spring.

대표청구항 ▼

[ What is claimed is:] [1.]1. A key switch, comprising:a cam member having side surfaces and having a vertical rotation face on a rotation axis thereof, said cam member rotating in accordance with insertion of a key adapted to be inserted into a key insertion opening on said key switch,a plunger com

[ What is claimed is:] [1.]1. A key switch, comprising:a cam member having side surfaces and having a vertical rotation face on a rotation axis thereof, said cam member rotating in accordance with insertion of a key adapted to be inserted into a key insertion opening on said key switch,a plunger coming into contact with a circumferential cam side of said cam member,a switch mechanism actuated by said plunger so as to be displaced in accordance with the rotation of said cam member, anda rotation lock mechanism for locking the rotation of said cam member when the key is pulled,said rotation lock mechanism comprising a pair of locking members each including a lock pin projecting to one of said side surfaces of said cam member which can be displaced in a direction parallel to the vertical rotation face of said cam member and a spring urging said locking member toward a position at which said pair of locking members can engage engagement portions on the cam member, said locking members being disposed to be displaced to a lock release position upon contact with said key resisting said spring.