| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a breaker which is small-sized and excellent in productivity.SOLUTION: A breaker includes: a fixed piece having a fixed contact; a movable piece which presses a movable contact against the fixed contact into contact; a thermally-actuated element which actuates the movable piece in the way that the movable contact separates from the fixed contact by thermal deformation; and a case housing the above. In a cover member 81 of the case, a plate-like cover piece 9 is embedded. The case 7 has: a thin part 87 on an inner surface side of the cover piece 9; and a thick part 88 which protrudes from the thin part 87 and is thicker than the thin part 87. The cover piece 9 has a through hole 91 in an area overlapping the thin part 87 in a planar view. Thus, when the cover piece 9 is inserted to mold the case, flow of resin becomes excellent, and productivity of the breaker is improved.</p> |
