Keytop sheet for push-button switches

摘要

A keytop sheet of a push-button switch includes a keytop, which is made of synthetic resin, molded on a sheet of resin film. 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. In another aspect, the curved projection is replaced by providing the film sheet surrounding the portion thereof on which the keytop is molded with a cut-out while leaving a portion remaining to form a hinge portion, and a nameplate provided with a hole shaped so that the keytop may be passed therethrough is attached to the film sheet so as to cover the cut-out and hinge portion of the film sheet. In a further aspect, a keytop sheet of a push-button switch includes a sheet of resin film in the interior of which a keytop made of synthetic resin is molded, a nameplate mounted on the film sheet and having an outer diameter greater than that of the film sheet, and a frame made of synthetic resin 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.