Method of manufacturing a keytop

摘要

A method of manufacturing a keytop of a push-button switch having a fixed contact and a movable contact arranged to oppose each other, and a keytop arranged above the movable contact pressing said movable contact, wherein there are provided an upper mold having cavities the shapes thereof are the same as those of the upper part of a keytop portion, a lower mold having cavities the shapes thereof are the same as those of the lower part of said keytop portion, and a resin film, said method including the steps of: clamping said resin film between said upper mold and said lower mold; injecting a molten resin into the cavities the shapes thereof are the same as those of the lower part of said keytop portion from a pin gate provided in either said upper mold or said lower mold, whereby said resin film is deformed by pressure and heat of said molten resin so as to bring the deformed resin film into adhering contact with the inner surface of the cavities in said upper mold, thereby allowing said molten resin to fill each of the cavities; and parting said upper and lower molds after said molten resin has hardened. <IMAGE> <IMAGE> <IMAGE>