Patent ID: 7312680
Filing Date: 2007-12-25
Classification: H01H,Y10T

Abstract:
1. A manual switch-off device for a permanent magnet switch operating mechanism, characterized in: the device includes a large shoe plate and a small shoe plate fixed onto a base plate in parallel, a transmission shaft rotatably installed onto the large shoe plate and the small shoe plate, an eccentric wheel fixed onto the transmission shaft between the large shoe plate and the small shoe plate, and an output shaft installed onto the base plate in parallel with the large shoe plate and the small shoe plate; in which one end of the output shaft has an end cap;, the large shoe plate has an open slot; the eccentric wheel has a spring column fixed thereon, and the spring column connects to one end of a manual switch-off spring through the open slot; the other end of the manual switch-off spring hooks to a spring mount point on the large shoe plate; the spring mount point being located above central extension line of the spring column and the transmission shaft under switch-on state, to satisfy requirement of the spring column passing dead point upon switching on.