Structure of the keypad for keyboard

Details Structure of the keypad for keyboard Structure of the keypad for keyboard

1993-04-12

1995-04-11

Peng, John K.

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

200520, 400490, H03K 1794, B41J 508

Patent

active

054062772

ABSTRACT:
An improved keypad includes a plurality of apertured bases in the keyboard, a pressing rod and a keypad for each of the apertured bases. The pressing rod has opposing projected tracks and the apertured base has slots on its interior wall. This structure allows the pressing rod to be housed inside the apertured base so as to reduce the friction during the keypad operation. The reduction of friction provides a smooth keyboard operation. Moreover, the gap between the exterior wall of the pressing rod and the interior wall of the aperture base is wider, therefore, the keypad resonance is lessened during operation.

REFERENCES:
patent: 4227163 (1980-10-01), Barnoski
patent: 4421432 (1983-12-01), Lieb
patent: 4769516 (1988-09-01), Allen
patent: 5120923 (1992-06-01), Kato et al.
patent: 5199556 (1993-04-01), Lee

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