Patent ID: 8149077
Filing Date: 2012-04-03
Classification: H01F,H01H

Abstract:
1. An electromagnetic operating device for a switch comprising: a fixed yoke formed in such a way that E-shaped yokes formed by laminating E-shaped magnetic steel sheets are arranged opposite each other with their projecting sections of the E-shape facing each other; square yokes formed by laminating magnetic steel sheets and having a ring-shaped core section and a projecting magnetic pole section are disposed on both outer sides of the E-shaped yokes; wherein the square yokes and the E-shaped yokes are integrally laminated with the E-shaped yokes being sandwiched between the square yokes; permanent magnets; a moving member for linearly moving a predetermined distance inside the fixed yoke; a rod connected to the moving member and penetrating the fixed yoke to project outward from both sides thereof; and coils disposed in the fixed yoke,