Patent ID: 6288353
Filing Date: 2001-09-11
Classification: H01H

Abstract:
A computer keyswitch comprising:a keycap;a base plate;a membrane circuit board positioned above the base plate having a pressure sensor for generating a key-pressing signal, a plurality of membrane penetrating holes formed around the pressure sensor, and a membrane fastening hole;a rubber sheet positioned on the membrane circuit board having an upwardly protruding rubber dome on an upper surface of the rubber sheet for elastically supporting the keycap upwardly, and a plurality of straps and rubber penetrating holes formed around the rubber dome wherein the rubber dome is positioned above the pressure sensor of the membrane circuit board;a rubber peg formed on a bottom surface of one of the straps of the rubber sheet; anda connecting device having an upper end and a lower end wherein the upper end of the connecting device is connected to a bottom surface of the keycap, while the lower end of the connecting device is installed on the base plate through the rubber penetrating holes and the membrane penetrating holes to fasten the keycap to the base plate in an up-and-down movable manner;wherein the rubber peg is inserted into the membrane fastening hole in order to accurately position the rubber dome of the rubber sheet above the pressure sensor of the membrane circuit board.