Patent ID: 6396381
Filing Date: 2002-05-28
Classification: H01H

Abstract:
A thermal protector comprising:a conductive fixed plate having a fixed contact at one end and formed with a first terminal for external connection at the other end; a movable plate having elasticity and conductivity provided with a movable contact at one end, said movable contact being brought into contact with said fixed contact by the elastic force; a second terminal for external connection connected to said movable plate; a bimetal performing a reversing operation when the temperature thereof exceeds a predetermined value, whereby said movable plate is displaced by the reversing force of said bimetal to separate said movable contact from said fixed contact; and a heating resistor, consisting of a PTC element, interposed between said fixed plate and said movable plate, wherein the central portion of said movable plate is cut into a U shape to form a tongue provided along the longitudinal axis of said movable plate, said tongue is brought into close contact with an upper electrode face of said heating resistor, a lower electrode face of said resistor is brought into contact with said fixed plate, and portions of said movable plate located on both sides of said cut operate as an elastic arm.