THERMALLY-ACTUATED SWITCH FOR SWITCHING CONDUCTING STATE TO NON-CONDUCTING STATE ACCORDING TO ABNORMAL HEATING STATE

摘要

PURPOSE: A thermally-actuated switch for switching conducting state to a non-conducting state according to an abnormal heating state is provided to apply the current to other current paths instead of a heating body by detecting the abnormal state of the heating body. CONSTITUTION: A first fixed contact(7a), a second fixed contact(8a), a thermal element(9) for displacing a free end between the first and the second fixed contacts, and a movable contact member(10) are installed in an inside of a housing(3). The movable contact member is located at the free end of the thermal element and comes in contact with either of the first and the second fixed contacts. When a present temperature is below a given point, the thermal element makes the movable contact member contact with the first fixed contact. When the present temperature exceeds the given point, the thermal element reverses to make the movable contact member contact with the second fixed contact.