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Title:
CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2019/038946
Kind Code:
A1
Abstract:
A circuit breaker comprises a make-break contact for making and breaking an electrical circuit, an open-contact spring, a toggle mechanism, and an electromagnetic operation mechanism. The open-contact spring biases the make-break contact in the opening direction. When the make-break contact shifts from the open state to the closed state, a biasing force that biases the make-break contact in the opening direction increases. The toggle mechanism shifts the make-break contact from the open state to the closed state. The electromagnetic operation mechanism includes: a moving core (63) moving against the biasing force to thereby cause the toggle mechanism to shift the make-break contact from the open state to the closed state; and a fixed core (61) that has a first attraction surface (61a) for attracting the moving core (63) with an inter-surface distance (A) between the first attraction surface (61a) and the moving core (63) that is shorter than a moving distance (B) of the moving core (63).

Inventors:
DEGUCHI, Tomoya (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
SAGARA, Yuta (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
IMAEDA, Ryunosuke (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KONDO, Keishu (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KOMOTO, Shigeki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
MORI, Mitsugi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
MASUDA, Shinichi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
IWASHITA, Hisashi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
UCHINO, Sosuke (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2018/001286
Publication Date:
February 28, 2019
Filing Date:
January 17, 2018
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H01H33/42; H01F7/16; H01H31/02; H01H33/38; H01H33/666
Foreign References:
JPS576146U1982-01-13
JP2003197425A2003-07-11
JP2006024481A2006-01-26
JPH01142128U1989-09-28
JPS6130942U1986-02-25
JP2015162402A2015-09-07
JPS278041Y1
US20100164662A12010-07-01
JPH0689808A1994-03-29
JPH0574625A1993-03-26
JPH06283326A1994-10-07
JP2008159270A2008-07-10
Attorney, Agent or Firm:
TAKAMURA, Jun (Sakai International Patent Office, Toranomon Mitsui Building 8-1, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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