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Patent Searching and Data


Title:
DIRECT-CURRENT CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2020/059086
Kind Code:
A1
Abstract:
The direct-current circuit breaker (10) is provided with: a case (20); two fixed contacts (33); two movable contacts (42); a bypass plate (41) electrically connecting the two movable contacts; a moving block (43) for causing the bypass plate to move; a moving block biasing member (434) for biasing the moving block at all times in a direction away from the fixed contacts; a thermally-responsive member (61) which is disposed at a position facing a placement surface and which deforms when the placement surface reaches a predetermined temperature or higher; a latch (51) which has a locking part for locking the moving block while the thermally-responsive member is in the pre-deformed state to restrict movement of the moving block and which is actuated when the thermally-responsive member deforms so that the locking part separates from the moving block and releases the restriction on the movement of the moving block; a shutter (73) to be inserted between the fixed contacts and the movable contacts when the movable contacts separate from the fixed contacts; and a shutter biasing member (72) for biasing the shutter at all times in the direction in which the shutter is inserted between the fixed contacts and the movable contacts.

Inventors:
SATOH SHIGEMI (JP)
ISHII SHIGEHISA (JP)
Application Number:
PCT/JP2018/034858
Publication Date:
March 26, 2020
Filing Date:
September 20, 2018
Export Citation:
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Assignee:
UBUKATA IND CO LTD (JP)
International Classes:
H01H37/02
Foreign References:
JP2016143559A2016-08-08
JP2002150905A2002-05-24
JP2012212543A2012-11-01
JP2004288604A2004-10-14
JP2016143559A2016-08-08
JP2016177891A2016-10-06
Other References:
See also references of EP 3855469A4
Attorney, Agent or Firm:
SATO INTERNATIONAL PATENT FIRM (JP)
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