Structure of key switch

Details Structure of key switch Structure of key switch

1992-08-04

1994-02-01

Recla, Henry J.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200520, 200530, H01H 1350

Patent

active

052834085

ABSTRACT:
A key switch includes a rectangular key cap having a unitary, hollow, rectangular plunger inserted into a rectangular hole on a key base and pressed to squeeze a rubber tone causing a conductor to electrically connect a contact on the printed circuit board of a keyboard, wherein the rectangular plunger has four circular rails on the four corners thereof along its length respectively inserted in four circular grooves on the rectangular guide slot of the key base for stable movement, and two smoothly curved, hooked spring plates releasably hooked with two opposite hooked portions on the key base for positioning.

REFERENCES:
patent: 1154055 (1915-09-01), Reeves
patent: 2203185 (1940-06-01), Walus
patent: 4418257 (1983-11-01), Muller et al.
patent: 4518833 (1985-05-01), Watkins
patent: 4556769 (1985-12-01), Inaba
patent: 4602138 (1986-07-01), Berutto et al.

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