Patent ID: 7649438

Claim:
A positive temperature coefficient thermistor device comprising: a metal body including a tubular hollow portion having a substantially rectangular cross section; a tabular positive temperature coefficient thermistor element having electrodes provided on both sides thereof; two terminal assemblies, each of which is in contact with a corresponding one of the electrodes on the positive temperature coefficient thermistor element; an insulating plate that is in direct contact with the lower surface of the hollow portion; and a pressure spring in direct contact with one of the two terminal assemblies; wherein the insulating plate, the positive temperature coefficient thermistor element, and the two terminal assemblies are disposed in the hollow portion in the metal body; and the pressure spring is disposed between an upper surface of the hollow portion and the terminal assembly adjacent to the top surface of the hollow portion such that the laminate of the insulating plate, the positive temperature coefficient thermistor element, and the two terminal assemblies is resiliently supported inside the hollow portion between the pressure spring and the lower surface of the hollow portion while the positive temperature coefficient thermistor element is interposed between the terminal assemblies.