| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize adequate conductivity between an upper inserting means and a movable contact rod. SOLUTION: A bearing 12 arranged to a cutout part 11 formed at the end part of a movable contractor 6 is fixed with a pin 13. The bearing 12 is engaged with a receiving hole 17 formed at the bottom of the cutout part 10 in the upper inserting means 9. A steel ball 19 is fitted in the receiving hole 17 via a spring 18 so that the steel ball 19 is always pressed against the external circumference surface of the bearing 12.</p> |
