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Title:
ELECTROMAGNETIC CONTACTOR
Document Type and Number:
WIPO Patent Application WO/2012/157171
Kind Code:
A1
Abstract:
Provided is an electromagnetic contactor capable of improving the suction force of a movable plunger by preventing the magnetic flux passing through the movable plunger from dropping when the movable plunger moves. An electromagnetic contractor provided with a movable contact (130) disposed so as to be able to come into contact with and separate from a pair of secured contacts (111, 112), and an electromagnet unit (200) for driving the movable contact. The electromagnet unit (200) is provided with: a magnetic yoke (201) having a cross-section that is in the shape of a U; an upper magnetic yoke (210) disposed so as to bridge the upper opening of the magnetic yoke (201); a spool (204) around which an exciting coil (208) disposed on the bottom plate of the magnetic yoke (201) is wound and which has a center opening; a movable plunger (215) disposed within the center opening of the spool (204) in a movable manner in the axial direction and connected to the movable contact (130); and an auxiliary yoke (203) for forming a magnetic path between the movable plunger (215) and the U-shaped magnetic yoke (201) while the movable plunger is in a release position.

Inventors:
NAKA YASUHIRO (JP)
TAKAYA KOUETSU (JP)
SUZUKI KENJI (JP)
TACHIKAWA HIROYUKI (JP)
Application Number:
PCT/JP2012/002328
Publication Date:
November 22, 2012
Filing Date:
April 03, 2012
Export Citation:
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Assignee:
FUJI ELEC FA COMPONENTS & SYS (JP)
FUJI ELECTRIC CO LTD (JP)
NAKA YASUHIRO (JP)
TAKAYA KOUETSU (JP)
SUZUKI KENJI (JP)
TACHIKAWA HIROYUKI (JP)
International Classes:
H01H50/36; H01H51/22
Foreign References:
JPS6482607A1989-03-28
JP3107288B22000-11-06
JPH01268005A1989-10-25
JPH10125196A1998-05-15
JP3107288B22000-11-06
Other References:
See also references of EP 2711961A4
Attorney, Agent or Firm:
HIROSE, Hajime et al. (JP)
Hirose 1 (JP)
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Claims:



 
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