Patent ID: 6054939
Filing Date: 2000-04-25
Classification: H01H

Abstract:
A keyboard assembly comprising:a base having a supporting surface;a circuit membrane mounted on the supporting surface of said base, having a plurality of switch elements;a water-resistant sheet covering said circuit membrane, said water-resistant sheet having a plurality of elastic portions protruded therefrom, each of which are disposed corresponding to each of the switch elements respectively, and said water-resistant sheet having a peripheral edge;a key frame disposed above said water-resistant sheet, having a plurality of key seats disposed corresponding to the elastic portions;a plurality of keys, each key being mounted on its respective key seat so that when a key is pressed down, its corresponding elastic portion is depressed to activate its associated switch element;an upper case mounted on said base, wherein a space for collecting liquid is formed between said key frame and said water-resistant sheet, said space communicating with said plurality of key seats such that liquid entering said key seat flows into said space.