Membrane panel switch
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United States of America Patent
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-
Jan 9, 1990
Grant Date -
N/A
app pub date -
Feb 8, 1988
filing date -
Apr 10, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A membrane panel switch is disclosed wherein a sheet of extruded foam-molded polypropylene with apertures for switches has a thickness greater than 2 mm, a printed circuit board has a pair of contact elements disposed within the aperture, a clicking plate in the aperture contacts with one of the contact elements and is spaced from the other of the contact elements, the clicking plate has projections at ends thereof extending to an opening of the aperture from a bottom pf the aperture, a press plate in the aperture has a spherical upper surface and lower surface contacting the clicking plate, the press plate further has holes in where the projections are inserted and guided and an insulating layer coupled to the sheet extending over the aperture and over the spherical upper surface.
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