Patent ID: 6559393
Filing Date: 2003-05-06
Classification: H01H

Abstract:
A switch comprising:a case having a bottom panel of an insulator and an opening in the top thereof; a support plate secured to and extending vertically upwardly from said bottom panel and terminating in a top end edge defining a central convex portion which is the highest in the center thereof; a movable contact blade formed of a metallic plate supported on said top end edge of said support plate for rotating movement about the top end edge defining a pivot axis and having attached thereon two movable contacts spaced apart in the direction of the pivot axis adjacent one end of the movable contact blade; two fixed contact blades affixed at one end to the bottom panel and each having a fixed contact attached thereto adjacent said one end in opposition to a corresponding one of the movable contacts with said other end portion of each fixed contact blade extending out through said bottom panel to define a terminal; a driving means having two sliding protrusions pressing on the upper surface of said movable contact blade and slidable in a direction perpendicular to the direction of said pivot axis; coil spring means having a biasing force to urge said driving means toward said movable contact blade; a rotatable actuator having a spring housing bore formed in the lower end portion in which the coil spring means is accommodated and including a columnar portion that holds said driving means retractably in abutment with said movable contact blade as said driving means is slidingly moved on said movable contact blade; and a cover means mounted so as to close the top opening of the case and having an aperture formed therethrough in the center thereof for rotatably holding said actuator which is inserted through said aperture; whereby rotation of said actuator selectively establishes and break electrical continuity between said terminals between said two fixed contacts.