| 摘要 |
In this breaker device, a pair of stationary electrodes 35, 35 are arranged while the protruding wall 32 is interposed between them and the U-shaped movable electrode 60 is engaged with them so as to close an electric circuit. The protective protruding section 61 is arranged at an upper end of the stationary electrode 35, and the protrusions 62 are provided on both sides of the protective protruding section 61. When the movable electrode 60 is engaged, it is elastically expanded and deformed when it comes into contact with the protrusion 62. Even in a case in which the protrusion 62 is scraped away by the friction caused between the protrusion 62 and the movable electrode 60, since the protrusion 62 is located at a position shifted from the stationary electrode 35, the scraped powder never gets into between the movable electrode 60 and the stationary electrode 35.
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