Folientastatur und deren Herstellungsmethoden

摘要

To make a spherical shape of a terminal end of an extruding part of a push-button switch to press a curved contact portion composed of a metal belleville spring and a resin film dome. In addition, a gate injecting mouth (4) for thermoplastic material (3) is open at the side surface of the extruding part (2) or at the side projection made in a mold to inject resin material in order to make molding of a spherical shape of the terminal end of an extruding part (2) of a push-button switch possible. By this structure, the present invention can provide a sheet-like key top having improved clicking touch and preventing breakage of a contact portion by residual stress.