| 摘要 |
PROBLEM TO BE SOLVED: To provide the a vacuum valve switching mechanism which is reliable in operation by shortening the distance between the contact point of a switching boss and a driving boss and the central line in the axial direction of the movable contact point, and by removing the slants of the switching boss and the movable contact point to prevent a vacuum valve from reduction in opening speed. SOLUTION: The projection 102 is provided on the side of the surface being in contact with the driving boss arm 100 in the switching boss arm 101, and when the vacuum bulb 31 opens, the driving boss arm 100 comes in contact with the projection 102. Therefore, the distance L between the contact point of the driving boss 20 and the switching boss 24 and the central line in the axial direction of the movable contact point 41 becomes short, the movable contact point 41 is prevented from inclining, and thereby the reduction in opening speed does not occur.
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