| 摘要 |
PROBLEM TO BE SOLVED: To improve operation of a thermal cut-off device by allowing self-heating to run at a cooler temperature.SOLUTION: A first compression member 28 is compressed between a thermal pellet 32 and a sliding contact member 26, and biases the sliding contact member 26 to close an electric circuit between a first electrical conductor 4 and a second electrical conductor 16, through a case 2, through the sliding contact member 26. A thermal cut-off device 1 interrupts the electric circuit between the first electrical conductor 4 and the second electrical conductor 16 when the thermal cut-off device 1 experiences a temperature that meets or exceeds a threshold cut-off temperature. The second electrical conductor 16 includes a shaft portion and a distal end 20. The distal end 20 includes a shoulder at an end adjacent to the shaft portion. The distal end 20 includes a contact surface. The contact surface includes a generally flat, annular portion that encircles the periphery of the distal end 20 of the second electrical conductor 16. The annular portion of the contact surface results from an indentation in the distal end 20 that creates a central concave portion. The surface area of the contact surface 38 that engages the sliding contact member 26 is increased. |
