Abstract: A computer keyswitch comprises clamping plate extended upward from the bottom plate thereof. The clamping plate is used to retain the upward motion of the pivotal shafts on bottom end of the two levers of the computer keyswitch. The position, orientation and height of the clamping plate have not limit such that the clamping plate has reduced thickness and height. Therefore, the computer keyswitch has lower height but with same level mechanism height and structural strength.

Abstract: An improved structure of keyswitch comprises a circuit base with a circuit layer, a resilient dome, a supporting lever and a keytop. The circuit base further comprises a substrate and a flexible circuit layer. T supporting lever comprising a first lever and a second lever pivotal to each other in scissors arrangement. The first lever has a sliding portion on bottom side thereof and the second lever has a rotating portion on bottom side thereof and a sliding portion on top side thereof. The sliding portion of the first lever comprises two clamping blocks and a sliding shaft arranged between the two clamping blocks. The clamping block is extended from the sliding shaft such that the edge at the intersection of an outer surface of the sliding shaft and an bottom surface of the sliding shaft is an embowed square shape. The sliding shaft is entirely or partially embedded into the first through hole.