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Patent Searching and Data


Title:
BISTABLE ELECTROMAGNETIC RELAY
Document Type and Number:
Japanese Patent JP2005158711
Kind Code:
A
Abstract:

To provide an electromagnetic relay consuming small power after operation of the relay and automatically reclosable when a contact is accidentally opened.

Permanent magnets 1 and 2 each have insufficient attractive force to overcome force of a spring 4 when yokes 3 and 7 are apart from each other, but, when the yokes 3 and 7 are brought together, the permanent magnets each have attractive force providing sufficient holding force against the spring means. An electromagnetic force generation coil 6 can be operated in a first condition to provide sufficient attractive force for connecting yokes 3 and 7 with the permanent magnets 1 and 2 against the force of the spring 4, and in a second condition to provide sufficient repulsive force between the yokes 3 and 7 with the spring 4 for separating the yokes 3 and 7 from each other against the force of the permanent magnets 1 and 2.


Inventors:
WEN WEIJIA
SHENG PING
NAM CHAU KWAN
Application Number:
JP2004306548A
Publication Date:
June 16, 2005
Filing Date:
October 21, 2004
Export Citation:
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Assignee:
CHINA PATENT INVEST LTD
International Classes:
H01H47/22; H01H50/54; H01H51/01; H01H51/22; H01H50/16; H01H51/24; H01H47/00; (IPC1-7): H01H47/22; H01H50/16; H01H50/54; H01H51/01; H01H51/24
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto