Patent ID: 6118092
Filing Date: 2000-09-12
Classification: H01H

Abstract:
A key switch comprising:a base;a key top arranged above said base;a pair of link members interconnected with each other, each of said link members including opposed first and second side walls, slide portions formed at one ends of said first and second side walls to be slidably engaged with said base, pivot portions formed at halfway points of said first and second side walls to be pivotably engaged with said key top to define a pivot axis of each link member, a joint shaft provided at another end of said first side wall to project from said first side wall, and a joint slot provided at another end of said second side wall to permit said joint shaft to be slidably and pivotably received in said joint slot of counterpart link member, said link members acting to support said key top above said base and to direct said key top in a vertical direction;a biasing member for elastically urging said key top vertically away from said base; anda switching mechanism for selectively opening and closing an electric circuit in connection with a vertical movement of said key top.