| 摘要 |
A portable computer keyboard assembly comprises an input membrane assembly (10) comprising first (20) and second (22) membranes, each having an electrical circuit provided on a surface thereof and means for separating the electrical circuits of the first (20) and second (22) membranes and permitting selective electrical connection therebetween at discrete contact nodes. The input membrane assembly (10) is configured to be secured to a portable computer. A keypad (8) is also provided which includes a plurality of keys and a support member for movably supporting the keys such that they are movable between a first position and a second operable position. The keys are arranged to correspond in position to the location of the contact nodes on the input assembly (10), and the keypad (8) is configured to be located relative to the input membrane (10) such that movement of the keys to the operative positions causes said selective electrical connection between the circuits of the first (20) and second (22) membranes at the corresponding contact nodes. Releasable securing means (77) is provided for releasably securing the keypad (8) in location relative to the input membrane assembly (10) and relative to the portable computer to which the input membrane assembly (10) is secured. The releasable securing means (77) also permits the keypad (8) to be released from its position relative to the input assembly (10) for cleaning and/or repair. |
