Patent ID: 6633222
Filing Date: 2003-10-14
Classification: H01H,H01M,Y02E

Abstract:
A battery breaker, comprising:a case; a fixed contact mounted to an inner bottom surface of one end of said case and connected to a terminal extending from the case outwards; an elastic movable piece mounted such that its tip end protrudes into said case through the other end of said case, and allowing a movable contact provided at said tip end to bring into contact with said fixed contact by the spring action; and a convex curved surface-shaped bimetal having a warping center located in the substantial center, and placed between said movable piece and the inner bottom surface except for said one end of said case so as to cover a projection provided on said inner bottom surface without interference of an outer periphery of said bimetal with the inner side surfaces of said case, said bimetal being warped at a predetermined working temperature to push up said movable piece for separating said movable contact from said fixed contact; wherein the projection has a flat top surface and said bimetal is mounted with its warping center located on the flat top surface of the projection; and wherein said movable piece has downwardly convex portions brought into contact with the opposite ends of said bimetal when said bimetal is warped.