Patent ID: 6496095
Filing Date: 2002-12-17
Classification: H01H

Abstract:
A push button switch comprising:a box having a button movably inserted in an open top of said box, a tubular member extending from an underside of said button and a spring biased between said tubular member and said box, a tongue extending from an underside of said button and a recessed area defined in a surface of said tubular member, said recessed area having a polygonal inner periphery and a central member located in a center of said recessed area, a first terminal plate and a second terminal plate respectively extending from a bottom of said box, a board extending from an inner side of said box and a hole defined in a surface of said board, two rods respectively extending from said inner side of said box; a movable member having two slots defined therethrough and said two rods movably received in said two slots, a U-shaped member having a leg thereof extending through said movable member and movably engaged with said recessed area, the other leg of said U-shaped member inserted in said hole in said board; a U-shaped bimetal plate having a central plate located between two legs of said U-shaped bimetal plate, a first contact point connected to said central plate and said two legs of said bimetal plate fixedly connected to a top of said first terminal plate, said bimetal plate located beside an end of said movable member, and an oscillation member having a first end pivotally connected to said second terminal plate and a second end of said oscillation member having a second contact point connected thereto, a curved spring having an end fixedly connected to said box and the other end of said curved spring connected to said oscillation member, said tongue contacting said curved spring.