Battery breaker

A battery breaker, comprising:

• a case;
• a fixed contact mounted to the 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 at a position one-sided from the 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 said movable piece has downwardly convex portions brought into contact with the opposite ends of said bimetal when said bimetal is warped.

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 said movable piece has downwardly convex portions brought into contact with the opposite ends of said bimetal when said bimetal is warped;
• and
• wherein the projection with said bimetal placed thereon is provided on said inner bottom surface of said case as being located at a position corresponding to a portion one-sided from the warping center of said bimetal in the longitudinal direction of said bimetal.