Patent ID: 6265677
Filing Date: 2001-07-24
Classification: H01H

Abstract:
A keyboard assembly comprising:a plurality of key caps, each of which having an end portion;a keyboard hood provided with a plurality of through holes, each through hole having a first opening and a second opening, the end portions of the key caps being inserted into the first opening, and a top rim being formed on the brim of each second opening and a plurality of protrusions being formed on the top rim of each through hole;a plurality of dome-shaped elastic components disposed within the through holes of the keyboard hood, each of the dome-shaped elastic components having an upper rim and a bottom so as to allow their bottoms to be urged by the end portions of the key caps, the protrusions formed on the top rim of each through hole being higher than the upper rim of the dome-shaped elastic components disposed within the through holes;a circuit membrane disposed in a manner that it contacts with the upper rims of the dome-shaped elastic components; anda keyboard base fastened to the keyboard hood so as to enclose the end portions of the key caps, the dome-shaped elastic components, and the circuit membrane therebetween.