| 摘要 |
PROBLEM TO BE SOLVED: To provide an adjusting screw attaching/detaching structure of a bimetal for a circuit breaker in which an adjusting screw is hard to come off even if the adjusting screw attaching/detaching part of a bimetal extends by heat. SOLUTION: Related to a bimetal 513, a metal 513H whose thermal expansion coefficient is large is laminated with a metal 513L whose thermal expansion coefficient is small, and a free end side is so bent that the surface of the metal 513H side whose thermal expansion coefficient is large faces each other, resulting in two facing pieces 513a and 513b parallel to each other. The facing pieces 513a and 513b are provided with threaded holes 513c and 513d that engage with an adjusting screw 514. The adjusting screw 514 is screwed in the threaded holes 513c and 513d. COPYRIGHT: (C)2004,JPO
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