| 摘要 |
A keyboard assembly has a PC board providing a series of switch contacts and a molded rubber keyboard providing a rubber base sheet overlying the PC board and having a series of rubber keys integral with the base sheet. Each key has contacts on its bottom surface for closing each of the switch contacts when its key is depressed. Stabilizing membranes prevent the keys from wobbling or binding. The membrane snugly engages each key, and the membrane is flexible along its Z axis but sufficiently stiff along its X and Y axes to limit the movement of the keys to strictly linear movement toward and away from their respective PC board switches.
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