Patents by Inventor Kazuo Kubono
Kazuo Kubono has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9570259Abstract: An electromagnetic relay includes: a pair of fixed contact terminals, each of which has a fixed contact; a movable contact spring having a pair of movable pieces and a coupler coupling the pair of movable pieces, each of the movable pieces having a movable contact that contacts and is separated from the fixed contact; an armature having a flat plate to be adsorbed to an iron core and a hanging portion bent from the flat plate and extending downward, and moves the movable contact spring by a rotation operation; and an electromagnetic device driving the armature, wherein the hanging portion has a projection to fix the movable contact spring on a face thereof facing the electromagnetic device and a pulling portion that extends downward more than the projection and pulls the movable contact spring when a current flows between the fixed contact and the movable contact.Type: GrantFiled: July 14, 2015Date of Patent: February 14, 2017Assignee: FUJITSU COMPONENT LIMITEDInventors: Yoichi Hasegawa, Kazuo Kubono
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Publication number: 20160372286Abstract: An electromagnetic relay includes a base, a fixed contact terminal including a fixed contact, and fixed to the base, a movable contact terminal including a movable contact that contacts the fixed contact, an electromagnet that generates a magnetic field when an electric current flows through a coil wrapped around an iron core, an armature connected to the movable contact terminal, and moved by a magnetic force generated in the electromagnet, a yoke including a vertical part, and a horizontal part connected to the iron core, and a bottom plate formed of an insulator, and covering a surface of the horizontal part facing away from the iron core. The bottom plate includes a yoke insertion part into which the horizontal part is inserted in a direction parallel to the horizontal part.Type: ApplicationFiled: June 9, 2016Publication date: December 22, 2016Inventors: Kazuo Kubono, Yoichi Hasegawa
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Patent number: 9478379Abstract: A polarized electromagnetic relay including an electromagnet; a pair of magnetic pole pieces driven by the electromagnet; a permanent magnet attached to the magnetic pole pieces; a contact section including a first fixed contact member with a normally open fixed contact, a first movable contact member with a normally open movable contact, a second fixed contact member with a normally closed fixed contact, and a second movable contact member with a normally closed movable contact; and a transmission member to which the magnetic pole pieces is attached. In accordance with a rectilinear movement of the magnetic pole pieces in parallel to a coil center axis, the transmission member rectilinearly moves in parallel to the center axis and thereby causes the normally open and closed movable contacts to perform an opening or closing operation in a mutually interlocked manner.Type: GrantFiled: March 27, 2013Date of Patent: October 25, 2016Assignee: FUJITSU COMPONENT LIMITEDInventors: Ying Li, Yoshinori Kurata, Satoshi Takano, Kazuo Kubono
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Patent number: 9412545Abstract: An electromagnetic relay includes a contact part including a fixed contact and a movable contact, the movable contact being displaceable in an approaching/separating direction with respect to the fixed contact; a drive part including a coil, a movable core, and a fixed core, the movable core being connected to the movable contact via an axial core, and the fixed core including a first plate member having a through hole through which the axial core is inserted and a second plate member that encapsulates the coil; and a permanent magnet polarized in a direction substantially perpendicular to the approaching/separating direction. The first plate member or the second plate member includes an extension part that extends toward the contact part, the extension part being configured to hold the permanent magnet.Type: GrantFiled: August 4, 2014Date of Patent: August 9, 2016Assignee: FUJITSU COMPONENT LIMITEDInventors: Kazuo Kubono, Yoichi Hasegawa
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Patent number: 9330872Abstract: An electromagnetic relay includes a contact that includes a fixed contact and a movable contact, a permanent magnet provided on the peripheral side of the contact, and a non-magnetic body. The movable contact is displaceable in a first direction to move toward the fixed contact and in a second direction to move away from the fixed contact. The permanent magnet has a polarity direction perpendicular to the first and second directions. The non-magnetic body faces toward the direction of a Lorentz force that acts based on the permanent magnet in a direct electric current flowing through the contact.Type: GrantFiled: April 25, 2014Date of Patent: May 3, 2016Assignees: FUJITSU COMPONENT LIMITED, NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITYInventors: Kazuo Kubono, Takashi Yuba, Yoichi Hasegawa, Takuji Murakoshi, Junya Sekikawa
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Patent number: 9299520Abstract: An electromagnetic relay includes a contact part including a fixed contact and a movable contact, and a drive part including a fixed core and a movable core. The movable core is connected to the movable contact via an axial core. The fixed core includes a plate member, which is positioned between the contact part and the drive part and includes a through hole through which the axial core is inserted. The movable core includes a convex part protruding in a direction opposing the plate member. The plate member includes a concave part opposing the convex part and having a shape corresponding to the convex part.Type: GrantFiled: August 1, 2014Date of Patent: March 29, 2016Assignee: FUJITSU COMPONENT LIMITEDInventors: Kazuo Kubono, Yoichi Hasegawa
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Publication number: 20160027602Abstract: An electromagnetic relay includes: a pair of fixed contact terminals, each of which has a fixed contact; a movable contact spring having a pair of movable pieces and a coupler coupling the pair of movable pieces, each of the movable pieces having a movable contact that contacts and is separated from the fixed contact; an armature having a flat plate to be adsorbed to an iron core and a hanging portion bent from the flat plate and extending downward, and moves the movable contact spring by a rotation operation; and an electromagnetic device driving the armature, wherein the hanging portion has a projection to fix the movable contact spring on a face thereof facing the electromagnetic device and a pulling portion that extends downward more than the projection and pulls the movable contact spring when a current flows between the fixed contact and the movable contact.Type: ApplicationFiled: July 14, 2015Publication date: January 28, 2016Applicant: FUJITSU COMPONENT LIMITEDInventors: Yoichi HASEGAWA, Kazuo KUBONO
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Publication number: 20150279600Abstract: An electromagnetic relay includes a first fixed spring including a first fixed contact, a second fixed spring including a second fixed contact, a movable spring including a spring, a first movable contact is connected a first end of the spring, and a second movable contact is connected to a second end of the spring, and a conductive member, one end connected to the first movable contact and another end connected to the second movable contact.Type: ApplicationFiled: March 24, 2015Publication date: October 1, 2015Inventors: Nobuyoshi Hiraiwa, Masato Morimura, Kazuo Kubono, Takashi Yuba
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Publication number: 20150187527Abstract: An electromagnetic relay includes a fixed contact, a movable contact corresponding to the fixed contact, a movable element that retains the movable contact and moves in a contacting direction and a separating direction relative to the fixed contact, an axial core coupled to the movable element, a movable core coupled to the axial core to move in the contacting direction and the separating direction relative to a movement of the axial core, a driving part that drives the movable core in the contacting direction, an urging part that exerts force to the axial core in the separating direction, and a constraining part that constrains the relative movement of the axial core in the separating direction.Type: ApplicationFiled: March 17, 2015Publication date: July 2, 2015Inventors: Kazuo KUBONO, Takashi YUBA, Yoichi HASEGAWA, Takuji MURAKOSHI
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Publication number: 20150054604Abstract: An electromagnetic relay includes a contact part including a fixed contact and a movable contact, and a drive part including a fixed core and a movable core. The movable core is connected to the movable contact via an axial core. The fixed core includes a plate member, which is positioned between the contact part and the drive part and includes a through hole through which the axial core is inserted. The movable core includes a convex part protruding in a direction opposing the plate member. The plate member includes a concave part opposing the convex part and having a shape corresponding to the convex part.Type: ApplicationFiled: August 1, 2014Publication date: February 26, 2015Inventors: Kazuo Kubono, Yoichi Hasegawa
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Publication number: 20150054605Abstract: An electromagnetic relay includes a contact part including a fixed contact and a movable contact, the movable contact being displaceable in an approaching/separating direction with respect to the fixed contact; a drive part including a coil, a movable core, and a fixed core, the movable core being connected to the movable contact via an axial core, and the fixed core including a first plate member having a through hole through which the axial core is inserted and a second plate member that encapsulates the coil; and a permanent magnet polarized in a direction substantially perpendicular to the approaching/separating direction. The first plate member or the second plate member includes an extension part that extends toward the contact part, the extension part being configured to hold the permanent magnet.Type: ApplicationFiled: August 4, 2014Publication date: February 26, 2015Inventors: Kazuo Kubono, Yoichi Hasegawa
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Publication number: 20140232489Abstract: An electromagnetic relay includes a contact that includes a fixed contact and a movable contact, a permanent magnet provided on the peripheral side of the contact, and a non-magnetic body. The movable contact is displaceable in a first direction to move toward the fixed contact and in a second direction to move away from the fixed contact. The permanent magnet has a polarity direction perpendicular to the first and second directions. The non-magnetic body faces toward the direction of a Lorentz force that acts based on the permanent magnet in a direct electric current flowing through the contact.Type: ApplicationFiled: April 25, 2014Publication date: August 21, 2014Applicants: FUJITSU COMPONENT LIMITED, NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITYInventors: Kazuo Kubono, Takashi Yuba, Yoichi Hasegawa, Takuji Murakoshi, Junya Sekikawa
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Patent number: 8686817Abstract: An electromagnetic relay includes an electromagnet part, an actuating part, a contact part and a base for holding the electromagnet part, the actuating part and the contact part. The contact part includes a pair of fixed plates having one end fixed to the base and the other end to which a fixed contact is attached, a pair of movable springs having one end fixed to the base and the other end to which a movable contact is attached, and a connecting portion extending between the movable springs and electrically connecting the movable contacts to each other. The actuating part is actuated so as to press only a part of the movable springs inside an area defined between longitudinal axes extending between one end and the other end of the movable springs through the movable contact, when the contact part closes.Type: GrantFiled: August 29, 2012Date of Patent: April 1, 2014Assignee: Fujitsu Component LimitedInventors: Kazuo Kubono, Takashi Yuba, Satoshi Takano, Daiei Iwamoto
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Publication number: 20130257566Abstract: A polarized electromagnetic relay including an electromagnet; a pair of magnetic pole pieces driven by the electromagnet; a permanent magnet attached to the magnetic pole pieces; a contact section including a first fixed contact member with a normally open fixed contact, a first movable contact member with a normally open movable contact, a second fixed contact member with a normally closed fixed contact, and a second movable contact member with a normally closed movable contact; and a transmission member to which the magnetic pole pieces is attached. In accordance with a rectilinear movement of the magnetic pole pieces in parallel to a coil center axis, the transmission member rectilinearly moves in parallel to the center axis and thereby causes the normally open and closed movable contacts to perform an opening or closing operation in a mutually interlocked manner.Type: ApplicationFiled: March 27, 2013Publication date: October 3, 2013Applicant: FUJITSU COMPONET LIMITEDInventors: Ying LI, Yoshinori KURATA, Satoshi TAKANO, Kazuo KUBONO
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Patent number: 8525622Abstract: An electromagnetic relay including an electromagnet device having an electromagnet and an armature, a contact portion openable and closable according to a movement of the armature. The contact portion includes a plurality of fixed contact members in which fixed contacts are respectively arranged and a plurality of movable contact members in which movable contacts opposed to the fixed contacts are respectively arranged, wherein the plurality of movable contact members operate according to a movement of the armature. The electromagnetic relay further includes a printed board to which the plurality of fixed contact members and the plurality of movable contact members are respectively electrically connected, and a plurality of contact terminal members electrically connected to the printed board and adapted to be connected to electrical parts provided outside.Type: GrantFiled: April 15, 2011Date of Patent: September 3, 2013Assignee: Fujitsu Component LimitedInventor: Kazuo Kubono
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Publication number: 20130057370Abstract: An electromagnetic relay includes an electromagnet part, an actuating part, a contact part and a base for holding the electromagnet part, the actuating part and the contact part. The contact part includes a pair of fixed plates having one end fixed to the base and the other end to which a fixed contact is attached, a pair of movable springs having one end fixed to the base and the other end to which a movable contact is attached, and a connecting portion extending between the movable springs and electrically connecting the movable contacts to each other. The actuating part is actuated so as to press only a part of the movable springs inside an area defined between longitudinal axes extending between one end and the other end of the movable springs through the movable contact, when the contact part closes.Type: ApplicationFiled: August 29, 2012Publication date: March 7, 2013Applicant: FUJITSU COMPONENT LIMITEDInventors: Kazuo Kubono, Takashi Yuba, Satoshi Takano, Daiei Iwamoto
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Publication number: 20110254645Abstract: An electromagnetic relay including an electromagnet device having an electromagnet and an armature, a contact portion openable and closable according to a movement of the armature. The contact portion includes a plurality of fixed contact members in which fixed contacts are respectively arranged and a plurality of movable contact members in which movable contacts opposed to the fixed contacts are respectively arranged, wherein the plurality of movable contact members operate according to a movement of the armature. The electromagnetic relay further includes a printed board to which the plurality of fixed contact members and the plurality of movable contact members are respectively electrically connected, and a plurality of contact terminal members electrically connected to the printed board and adapted to be connected to electrical parts provided outside.Type: ApplicationFiled: April 15, 2011Publication date: October 20, 2011Applicant: Fujitsu Component LimitedInventor: Kazuo Kubono
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Patent number: 7679476Abstract: A polarized electromagnetic relay including an electromagnet assembly, a contact section insulated from the electromagnet assembly, and a force transfer member disposed between the electromagnetic assembly and the contact section. The electromagnet assembly includes an electromagnet, an armature driven by the electromagnet, and a permanent magnet carried on the armature. The armature includes first and second electrically conductive plate elements holding the permanent magnet therebetween in a direction of magnetization of the permanent magnet and disposed to orient the direction of magnetization in parallel with the center axis of the coil. The armature is arranged linearly movably in a direction parallel with the center axis in a state where a part of the first electrically conductive plate element is inserted into a space between the outer peripheral region of the iron core head portion and the distal end region of the yoke major portion.Type: GrantFiled: January 31, 2008Date of Patent: March 16, 2010Assignee: Fujitsu Componenet LimitedInventors: Kazuo Kubono, Shinichi Sato
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Publication number: 20080180197Abstract: A polarized electromagnetic relay including an electromagnet assembly, a contact section insulated from the electromagnet assembly, and a force transfer member disposed between the electromagnetic assembly and the contact section. The electromagnet assembly includes an electromagnet, an armature driven by the electromagnet, and a permanent magnet carried on the armature. The armature includes first and second electrically conductive plate elements holding the permanent magnet therebetween in a direction of magnetization of the permanent magnet and disposed to orient the direction of magnetization in parallel with the center axis of the coil. The armature is arranged linearly movably in a direction parallel with the center axis in a state where a part of the first electrically conductive plate element is inserted into a space between the outer peripheral region of the iron core head portion and the distal end region of the yoke major portion.Type: ApplicationFiled: January 31, 2008Publication date: July 31, 2008Applicant: FUJITSU COMPONENT LIMITEDInventors: Kazuo Kubono, Shinichi Sato