Push-button switch, keytop, and method of manufacturing the keytop
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United States of America Patent
Stats
-
Jan 18, 1994
Grant Date -
N/A
app pub date -
Oct 29, 1991
filing date -
Oct 30, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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