Patent ID: 6354210
Filing Date: 2002-03-12
Classification: G06F,H01H

Abstract:
A keyboard assembly having a keyboard hood, a plurality of key caps disposed on the keyboard hood, a circuit membrane for being actuated by the key caps, a rubber sheet disposed between the key caps and the circuit membrane, a keyboard base fastened to the keyboard hood so as to enclose the rubber sheet and the circuit membrane therebetween, a first through hole formed on the keyboard base, a corresponding second through hole formed on the rubber sheet, a protrusion portion corresponding to the first through hole formed on the bottom surface of the keyboard hood, and a screw hole formed in the protrusion portion, the keyboard base being fastened to the keyboard hood by having a fastening screw passing through the first and the second through holes and screwed into the screw hole, characterized in that:a step-shaped portion, the step-shaped portion and the keyboard base defining a second receiving space when the tip end of the protrusion portion contacts the keyboard base; and an edge portion formed along the second through hole of the rubber sheet, wherein a thickness of the edge portion is larger than the second receiving space, and the edge portion of the rubber sheet is compressed by both the step-shapes portion and the keyboard base.