| 摘要 |
PURPOSE:To prevent an accident resulting in the burning from the abnormal heating by providing a washer made of a shape memory alloy arranged between a washer and the head section lower face and rotatably fitted to the neck section and deformed in the direction to separate the washer from the head section lower face when the temperature becomes a fixed value or higher. CONSTITUTION:A washer 7 is made of a conductive material, after a screw section 4 is inserted, the washer 7 is rotatably hooked on a neck section 5, with a claw 8 protruded. At this time, it can be hooked more firmly by a collar section 6. A washer 9 is made of a shape memory alloy and arranged between the washer 7 and the head section lower face 3a and rotatably fitted on the neck section 5. When the temperature of a terminal becomes a fixed value or higher, the washer 9 is deformed into a stored wave form, the washer 7 is separated from the head section lower face 3a, and an electric wire W is pressed to a terminal plate 10. The contact resistance between the electric wire W and the terminal plate 10 is decreased, and the abnormal heating is prevented.
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