Flat keyboard switch

Details Flat keyboard switch Flat keyboard switch

1992-02-19

1994-04-19

Luebke, Renee S.

Electricity: circuit makers and breakers

Electric switch details

Indicators

H01H 916

Patent

active

053047648

ABSTRACT:
A flat keyboard switch comprises a printed circuit board having a plurality of fixed contacts and a light emitting element provided thereon, a diaphragm disposed above the fixed contacts and serving as a movable contact for electrically connecting the fixed contacts to each other, a surface sheet having an indicium printed at a portion thereof above the diaphragm, the indicium being made of a material having a light transmitting property, a movable element disposed between the diaphragm and the surface sheet, a light introducing plate disposed in the neighborhood of the light emitting element for scattering light emitted from the light emitting element toward the movable element, and a light introducing member interposed between the movable element and the light introducing plate being formed as a unitary member together with the movable element and the light introducing plate.

REFERENCES:
patent: 4163883 (1979-08-01), Boulanger
patent: 4343975 (1982-08-01), Sado
patent: 5081329 (1992-01-01), Mitusinski et al.

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