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公开(公告)号：US20200006026A1
公开(公告)日：2020-01-02
申请号：US16570378
申请日：2019-09-13
Inventor： Satoshi SAKAI , Katsuya URUMA
Abstract: An electromagnetic device includes a fixed iron core through which a first magnetic flux flows, a movable iron core that reciprocates to separate from the fixed iron core by a predetermined gap when a current applied to a coil, which generates the first magnetic flux, is stopped and move to the fixed iron core by an attractive force when the current is applied to the coil. The electromagnetic device also includes a permanent magnet that generates a second magnetic flux. The opposed surface of the fixed iron core and the opposed surface of the movable iron core may be opposed in a reciprocating direction of the movable iron core. The permanent magnet may be attached to the fixed iron core such that a magnetized surface of the permanent magnet is opposed and exposed to the opposed surface of the movable iron core.
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公开(公告)号：US20170365432A1
公开(公告)日：2017-12-21
申请号：US15619885
申请日：2017-06-12
Inventor： Satoshi SAKAI , Katsuya URUMA
CPC classification number: H01H50/20 , H01H50/163 , H01H50/36 , H01H50/44 , H01H51/065 , H01H51/2209 , H01H51/27
Abstract: An electromagnetic device includes: a coil configured to generate a first magnetic flux; a fixed member, a movable member configured to reciprocate to separate from the fixed member by a predetermined gap when a current applied to the coil is stopped and move to the fixed member by an attractive force when the current is applied to the coil; and a permanent magnet configured to generate a second magnetic flux between the respective opposed surfaces of the fixed member and the movable member in the same direction as the first magnetic flux. The permanent magnet is attached to at least one of the fixed member and the movable member such that a magnetized surface of the permanent magnet is opposed and exposed to the opposed surface of the other one of the fixed member and the movable member.
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3.发明申请公开(公告)号：US20180061599A1
公开(公告)日：2018-03-01
申请号：US15684323
申请日：2017-08-23
Inventor： Hideki ENOMOTO , Satoshi SAKAI
CPC classification number: H01H50/08 , H01H1/0015 , H01H50/06 , H01H50/54 , H01H50/546 , H01H2009/0292 , H01H2050/025
Abstract: A contact device includes: a contact block including fixed contacts and movable contacts brought into contact with and separated from the fixed contacts; and a drive block configured to bring the movable contacts into contact with the fixed contacts and separate the movable contacts from the fixed contacts. The contact block includes: a contact unit including the fixed contacts and the movable contacts; a housing case having a housing space for housing the contact unit; and a window portion provided on a wall portion of the housing case and having higher light transmission than the wall portion.
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公开(公告)号：US20170365431A1
公开(公告)日：2017-12-21
申请号：US15619816
申请日：2017-06-12
Inventor： Satoshi SAKAI , Katsuya URUMA
Abstract: An electromagnetic device includes a coil, a fixed member, a movable member configured to reciprocate to separate from the fixed member by a predetermined gap when a current applied to the coil is stopped and move to the fixed member by an attractive force when the current is applied to the coil, and a permanent magnet. The permanent magnet is arranged at a position adjacent to the gap and separated from the fixed member and the movable member with a space interposed therebetween. A direction of a second magnetic flux generated by the permanent magnet conforms to a direction of a first magnetic flux generated between the respective opposed surfaces of the fixed member and the movable member when the current is applied to the coil.
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