Push-button switch, keytop, and method of manufacturing the keyt

Details Push-button switch, keytop, and method of manufacturing the keyt Push-button switch, keytop, and method of manufacturing the keyt

1993-04-14

1994-11-08

Barrett, Glenn T.

Electricity: circuit makers and breakers

Solid contact

Push button operated

2003022, 200345, H01H 1314

Patent

active

053629345

ABSTRACT:
The keytop of a push-button switch includes a keytop portion situated on the top of a resin film, and a retaining portion situated on the underside of the resin film. The keytop portion and retaining portion are formed into a unitary body by a resin-molding process in which resin is passed through a hole provided in the resin film such that the resin film is sandwiched between the keytop portion and the retaining portion. In another embodiment, the retaining portion is loop-shaped and is formed into a unitary body with the keytop portion by a resin-molding process in which the resin passes through a plurality of holes provided in the resin film in a pattern corresponding to the loop-shaped circumference of the retaining portion. The resin film is sandwiched in a water-tight state between the keytop portion and the loop-shaped retaining portion.

REFERENCES:
patent: 4471189 (1984-09-01), Bacon et al.
patent: 4794215 (1988-12-01), Sawada et al.
patent: 4997998 (1991-03-01), Bauer
patent: 5150913 (1992-09-01), Hoelzl

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