Patent ID: 6056457
Filing Date: 2000-05-02
Classification: G06F,H01H

Abstract:
A keyboard comprising:a cover chassis comprising a plurality of supporting structures and a plurality of key caps of which the bottom sides are connected to the supporting structures;a base chassis installed below the cover chassis comprising a plurality of protruding columns;a metal plate installed between the cover and the base chassis for strengthening the structure of the keyboard;a flexible circuit board installed between the cover chassis and the metal plate comprising a plurality of switches positioned below each of the key caps of the cover chassis for detecting pressures exerted on the key caps, the metal plate for maintaining the flexible circuit board at a predetermined level between the cover and base chassis;wherein the protruding columns have one or more predetermined heights and the protruding columns of a specific height being used for supporting the metal plate of a corresponding thickness so as to enable the metal plate to maintain the flexible circuit board at the predetermined level between the cover and the base chassis.