Power breaker

摘要

A power breaker includes a fine motion mechanism portion having a chattering suppression portion formed of ring members and a ring member provided with sloping surfaces or curved surfaces at positions corresponding to one another in a state stacked up in a center axis direction, so that an impact generated upon collision of a movable electrode with a fixed electrode when a circuit is closed is trapped as a compression force. Hence, kinetic energy generated upon collision is consumed by energy absorption by friction due to a spring property of the ring members and a frictional force on the contact surfaces. It thus becomes possible to reduce a generation time of a chattering action.

主权项

1. A power breaker, comprising:
a switch portion formed of a fixed electrode and a movable electrode provided so that the movable electrode is allowed to come into contact with and separate from the fixed electrode; a movable shaft extending from the movable electrode; an operation mechanism closing and opening the switch portion by driving the movable shaft; a frame holding the switch portion and the movable shaft inside; and a fine motion mechanism provided with a chattering suppression portion formed of two or more separate ring members in contact with each other on sloping surfaces or curved surfaces formed at positions corresponding to each another in a state stacked up in a central axis direction and formed in a driving direction of the movable electrode on a side of a surface of the fixed electrode fixed to the frame opposite to a surface with and from which the movable electrode comes into contact and separates, and trapping a force generated upon collision of the movable electrode with the fixed electrode during a circuit closing operation in the chattering suppression portion as a compression force due to a spring property of the ring members and a frictional force on the sloping surfaces or curved surfaces.