| 摘要 |
A breaker having a shaft (9), an operation arm (7), and an electromagnetic operation means (10). The shaft (9) is provided pivotable about an axis (91). The operation arm (7) is pivotally connected by a first connection section to the shaft (9) with a first predetermined distance ra vertically away from the axis (91) and is connected to a movable member by a second connection section. The electromagnetic operation means (10) has a drive shaft (16) that is connected to the shaft (9) by a third connection section provided at a circumferentially different position of the shaft (9) from the first connection section and is driven so as to move on a straight line perpendicularly crossing the axis (91) with a second predetermined distance rb from the axis (91). The electromagnetic operation means (10) is urged to drive a drive shaft (16), which rotates the shaft (9) to drive the movable member via the operation arm (7). An operation mechanism section is simplified and downsized, and controllability and reliability of the breaker are improved. ® KIPO & WIPO 2008
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