Switch having dust-proof cover

摘要

A switch device which can surely prevent introduction of foreign articles past an opening at the top of a case without employing a cover made of a rubber material. The switch device includes a cover made of a synthetic resin material and mounted at the top of a casing on which a switch operating member is supported for pivotal motion and within which a conductor plate is mounted for rocking motion such that a tilting motion of the switch operating member will cause rocking motion of the conductor plate to make a switching operation of the switch device. The cover has an opening formed therein through which the switch operating member extends downwardly into the inside of the casing, and a pair of downwardly extending projected walls are formed on opposite peripheral edges of the opening of the cover while the switch operating member has a pair of semicylindrical flanges formed thereon which extend in a curve centered at the axis of pivotal motion of the switch operating member and are opposed to and engaged at upper faces thereof with the projected walls of the cover.