Title:
ELECTROMAGNETIC SWITCH
Document Type and Number:
WIPO Patent Application WO/2014/076865
Kind Code:
A1
Abstract:
Provided is an electromagnetic switch that can secure a stable operation by increasing the attractive force of an electromagnet unit by increasing the flux density between a mobile plunger and a magnetic yoke. The present invention is provided with: a pair of stationary terminals (111, 112) disposed in a stationary manner maintaining a predetermined spacing within a contact housing case (102); a mobile terminal (130) provided within the contact housing case in a manner able to contact and separate from the pair of stationary terminals; and an electromagnet unit (200) that causes the mobile terminal to contact and separate from the pair of stationary terminals. The electromagnet unit has: a magnetic yoke (201, 210) that encircles an excitation coil (208); a mobile plunger (215) that is disposed in a manner able to move through a through hole provided to the magnetic yoke and that has a pole-contact face that opposes the pole-contact face of the magnetic yoke; and a linking shaft (131) that links the mobile plunger and the mobile terminal. The pole-contact face of the mobile plunger is configured from an annular protrusion that increases the flux density at a width narrower than the opposing surface of the magnetic yoke.
Inventors:
NAKA YASUHIRO (JP)
TAKAYA KOUETSU (JP)
SUZUKI KENJI (JP)
TAKAYA KOUETSU (JP)
SUZUKI KENJI (JP)
Application Number:
PCT/JP2013/005818
Publication Date:
May 22, 2014
Filing Date:
September 30, 2013
Export Citation:
Assignee:
FUJI ELEC FA COMPONENTS & SYS (JP)
FUJI ELECTRIC CO LTD (JP)
FUJI ELECTRIC CO LTD (JP)
International Classes:
H01H50/20
Foreign References:
| JP2012054047A | 2012-03-15 | |||
| JPS6118556U | 1986-02-03 | |||
| JP2012089491A | 2012-05-10 |
Attorney, Agent or Firm:
HIROSE, Hajime et al. (JP)
Hirose 1 (JP)
Hirose 1 (JP)
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