Patent ID: 6683264
Filing Date: 2004-01-27
Classification: H01H

Abstract:
A key switch structure comprising:a key top; a click rubber having a resilient force that pushes said key top upward when said key top is depressed; a membrane switch arranged so that at least a portion of said membrane switch is disposed under said click rubber; a reinforcing base plate disposed on the bottom of said key switch structure; a pair of stabilizers disposed between said reinforcing base plate and the bottom surface of said key top wherein said pair of stabilizers are arranged so that there is one said stabilizer on each side of said click rubber; a pair of stabilizer holders are formed at opposing ends of the bottom of said key top so that each said stabilizer holder can hold one top end of each said stabilizer; a pair of frames that are arranged so that each said frame supports one said stabilizer; a pair of top free motion range limiters are each formed between said stabilizer holder and said key top for each said stabilizer wherein said top free motion range limiter is further formed to enclose a first top end and a second top end of each stabilizer therein in a free fitting manner; a pair of bottom free motion range limiters are formed on each said frame so that each said bottom free motion range limiter is embedded in and affixed to a free range limiter engagement section wherein said free motion range limiting engagement section is formed within said reinforcement base plate and said pair of bottom free motion range limiters are further formed to enclose a first bottom end and a second bottom end of each stabilizer therein in a free fitting manner; and said frame and said membrane switch are affixed on said reinforcing base plate so that said frame and said membrane switch do not overlap.