发明名称 |
Electromagnetic switch having magnetic yoke with slits |
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. |
申请公布号 |
US9564279(B2) |
申请公布日期 |
2017.02.07 |
申请号 |
US201514677188 |
申请日期 |
2015.04.02 |
申请人 |
FUJI ELECTRIC FA COMPONENTS & SYSTEMS CO., LTD.;FUJI ELECTRIC CO., LTD. |
发明人 |
Naka Yasuhiro;Suzuki Kenji;Sakata Masayoshi |
分类号 |
H01H50/64;H01H50/42;H01H50/36;H01H9/44;H01H50/02 |
主分类号 |
H01H50/64 |
代理机构 |
|
代理人 |
Kanesaka Manabu |
主权项 |
1. An electromagnetic switch, comprising:
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, wherein the electromagnet unit has a magnetic yoke enclosing an exciting coil, a movable plunger having a contact pole surface facing a contact pole surface of the magnetic yoke, and a linking shaft which links the movable plunger and the movable contact, and a holding force for holding the movable plunger is generated and formed on the contact pole surface of the magnetic yoke by magnetic fluxes generated by a flowing current flowing through the movable contact when the movable contact contacts the pair of fixed contacts, and a magnetic path generated by the exciting coil and overlapped with the magnetic fluxes flowing through the movable contact. |
地址 |
Tokyo JP |