Membrane panel switch
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United States of America Patent
Stats
-
Jul 3, 1990
Issued Date -
N/A
app pub date -
Oct 18, 1989
filing date -
Apr 10, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A membrane panel switch is formed by cutting holes in a sheet of extruded foam-molded polypropylene having a thickness greater than 2 mm. The sheet is placed on a printed circuit board with a pair of contact elements located in each of the holes. Clicking plates with extensions projecting from them are placed in the holes in contact with one contact element and spaced from the other. A press plate with a spherical upper surface and holes in the lower surface is placed in each of the sheet holes with the clicking plate extensions projecting into the press plate's lower surface holes. An insulating layer is coupled to the to cover the sheet holes and components therein.
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