Keytop sheet for push-button switches

Details Keytop sheet for push-button switches Keytop sheet for push-button switches

1993-10-20

1995-12-12

Recla, Henry J.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200520, 200512, 200513, H01H 312

Patent

active

054751926

ABSTRACT:
A keytop sheet of a push-button switch includes a keytop, which is made of synthetic resin, molded on a sheet of resin film. A portion of the film sheet surrounding the portion thereof on which the keytop is molded is provided with a curved projection protruding in a downward and/or upward direction from the surface of the film sheet. Alternatively, a cut-out separates the portion of the film sheet on which the keytop is molded from the remainder of the film sheet while leaving a hinge portion, and a nameplate through which the keytop passes is attached to the film sheet so as to over the cut-out and hinge portion of the film sheet. The nameplate may have an outer diameter greater than that of the film sheet, and a frame made of synthetic resin is fixed to an underside of the film sheet on an outer peripheral portion thereof. The outer peripheral portion of the nameplate is bent and fixed to an outer peripheral side surface of the frame.

REFERENCES:
patent: 4814561 (1989-03-01), Kawasaki
patent: 4839474 (1989-06-01), Hayes-Pankhurst et al.

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