| 摘要 |
PROBLEM TO BE SOLVED: To prevent a movable contact driven to open by an electromagnetic repulsive force between contact points butting against each other when a short- circuit current flows therethrough from making contact again with a fixed contact by a spring force of a contact spring before the movable contact is driven to open by the motion of a switch mechanism. SOLUTION: A pair of elastically deformable projections 23 confronting each other are provided on lateral side walls of a movable-contact holder 3 for turnably holding a movable contact 1, the movable contact 1 gets over the projections 3 while elastically deforming them when it is opened by an electromagnetic repulsive force to a position shown by a chained line, and after the electromagnetic repulsive force is decreased, the movable contact 1 is held at an open position by being locked by the projections 23.
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