Patent ID: 6392176
Filing Date: 2002-05-21
Classification: H01H

Abstract:
A keyswitch comprising:a keytop defining a bottom assembling surface; a resilient dome disposed below said keytop; a first lever having a first top end portion coupled to said assembling surface of said keytop, said first lever including a first pivotal shaft and pair of first lateral side portions extending therefrom to said first top end portion, said first lever defining a through hole for receiving said resilient dome, each said first lateral side portion having intermediately protruding therefrom a convex part having an axially extended opened groove formed therein; a second lever having a second top end portion coupled to said assembling surface of said keytop, said second lever including a pair of second lateral side portions extending from said second top end portion, each said second lateral side portion defining an intermediate concave part having a pivotal rod projecting therefrom to pivotally engage said opened groove of one said first lateral side portion convex part, each said second lateral side portion having formed at a free end thereof a clamping part and a second pivotal shaft; and, a base disposed below said keytop, said resilient dome, and said first and second levers, said base having formed therein a first through hole and a pair of second through holes, said base including: a first pivotal stage defining a raised portion disposed adjacent said first through hole to engage said first pivotal shaft, said first raised portion having an elongate intermediate portion extending laterally between a pair of broken edges; a pair of second pivotal stages each defining a second raised portion disposed adjacent one of said second through holes to engage in pivotally displaceable manner one of said second pivotal shafts, each said second pivotal stage engaging one of said clamping parts; and, a pair of baffle plates each disposed adjacent one of said second pivotal stages.