Patent ID: 6444933
Filing Date: 2002-09-03
Classification: H01H

Abstract:
A key switch comprising:a key top for receiving pressure from a user's finger; a link, coupled to the key top, for lowering the key top when pressure is applied to the key top and for pushing the key top upwardly when the pressure is released; and a flexible printed circuit provided on an upper surface of a keyboard frame for recognizing key action by a pressing-contact of the link therewith; wherein the link comprises integrally formed first and second legs being pivot-coupled with each other, an integrally formed return plate spring applying a returning force to the key top, and an integrally formed contact plate spring coming into pressing-contact with the flexible printed circuit, the first leg being also pivot-coupled with the frame and the second leg being also freely pivot-coupled with the frame through a slot-shaped hole, so that the second leg and the frame are slid relative to each other along the slot-shaped hole and stop the relative sliding movement at an end of the slot-shaped hole when the key top is pushed down against a resilient force of the return plate spring.