| 摘要 |
An electromagnetic switch includes a pair of fixed contacts disposed and fixed in a contact housing case with a predetermined distance therebetween; a movable contact disposed in the contact housing case so as to contact and separate from the pair of fixed contacts; and an electromagnet unit which brings the movable contact into and out of contact with the pair of fixed contacts. The electromagnet unit has a magnetic yoke enclosing an exciting coil, a movable plunger having a contact pole surface facing the contact pole surface of the magnetic yoke, and a linking shaft which links the movable plunger and the movable contact, and magnetic paths through which a holding force is generated by external magnetic fluxes generated by a flowing current when the movable contact contacts the pair of fixed contacts, are formed on the contact pole surface of the magnetic yoke. |
