Patents by Inventor Mitsugu Kawarai
Mitsugu Kawarai 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: 10438737Abstract: An electronic component includes a magnetic core member, a winding and a magnetic exterior body. The magnetic core member has a flat base and a core. The flat base has a top surface, a bottom surface, a first side surface and a second side surface opposite to the first side surface. The core is located on the top surface of the flat base. A winding has an edgewise coil and two non-wound flat wires that extend from the edgewise coil. A magnetic exterior body covers at least the core and the edgewise coil. The two non-wound flat wires continuously extend along the top surface, the first side surface, the bottom surface and the second side surface of the flat base in this order. The two non-wound flat wires located on the bottom surface work as electrodes.Type: GrantFiled: November 30, 2016Date of Patent: October 8, 2019Assignee: SUMIDA CORPORATIONInventors: Shinichi Sakamoto, Zhigang Cheng, Fernando Chan Mock, Mitsugu Kawarai
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Publication number: 20190304660Abstract: A coil component including a coil formed by winding an insulation-coated wire and a composite magnetic body embed with the coil, wherein the composite magnetic body contains: a metallic magnetic powder made by powderizing a metallic magnetic material and a binder resin; and wherein the average particle size D50[?m] of the metallic magnetic powder satisfies the following formula (1): D50?2.192×(Fmax)?0.518×?0.577??(1) wherein (Fmax) is an upper limit operation-frequency [MHz] at which Q-value starts decreasing beyond the maximum value in a case of increasing the frequency applied to the coil component, and “?” is electrical-resistivity [??·cm] of the metallic magnetic material.Type: ApplicationFiled: March 25, 2019Publication date: October 3, 2019Inventors: Mitsugu KAWARAI, Satoru YAMADA
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Publication number: 20180151286Abstract: A magnetic element including: a core including magnetic powders of volume occupancy within the range of 60-volume % to 80-volume % with respect to the whole volume, including a binder resin of volume occupancy of 12-volume % or more with respect to the whole volume and further including vacancy of volume occupancy of 8-volume % or more with respect to the whole volume; and a coil which is formed by winding a conductive wire and concurrently, which is buried into the core.Type: ApplicationFiled: December 27, 2017Publication date: May 31, 2018Inventors: Akihiko NAKAMURA, Mitsugu KAWARAI
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Publication number: 20180068770Abstract: A composite magnetic material includes a metal magnetic powder, a binder resin, and a metallic soap. A melting point of the organic metallic soap is equal to or lower than a thermosetting temperature of the binder resin. The organic metallic soap and the binder completely cover an entire surface of the metal magnetic powder. Further, 0.01 wt %<(wt % of the organic metallic soap)/(wt % of the organic metallic soap+wt % of the metal magnetic powder+wt % of the binder resin)×100<2.0 wt %.Type: ApplicationFiled: August 28, 2017Publication date: March 8, 2018Inventors: Mitsugu KAWARAI, Kazuhisa SATO
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Publication number: 20180061558Abstract: A terminal plate member on which a terminal of a coil component is mounted including: an annular frame having an inner peripheral edge; a pair of extension members extending from the inner peripheral edge of the annular frame toward an inner space of the annular frame member in a first direction; and a deformable section provided in the annular frame at proximal end of one of the pair of extension members, the deformable section having a more easily deformable property than other sections of the annular frame when force is applied. The deformable section is provided along at least an entire width in a second direction of the one of the pair of extension members. The second direction is perpendicular to the first direction.Type: ApplicationFiled: July 28, 2017Publication date: March 1, 2018Inventors: Yoshiyuki TAHARA, Teruaki TANAKA, Akihiko NAKAMURA, Satoru YAMADA, Mitsugu KAWARAI
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Patent number: 9887033Abstract: A magnetic element including: a core including magnetic powders of volume occupancy within the range of 60-volume % to 80-volume % with respect to the whole volume, including a binder resin of volume occupancy of 12-volume % or more with respect to the whole volume and further including vacancy of volume occupancy of 8-volume % or more with respect to the whole volume; and a coil which is formed by winding a conductive wire and concurrently, which is buried into the core.Type: GrantFiled: March 8, 2016Date of Patent: February 6, 2018Assignee: SUMIDA CORPORATIONInventors: Akihiko Nakamura, Mitsugu Kawarai
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Publication number: 20170221623Abstract: An electronic component includes; a magnetic-body core having a plate-shaped portion and a core portion which extends from an upper surface of the plate-shaped portion; a winding wire which includes a wound portion wound by a rectangular wire into an Edgewise winding form and two non-wound portions extending from the wound portion to two distal ends, and the core portion is inserted through the wound portion; and a magnetic exterior body which covers at least the wound portion and the core portion. The two non-wound portions are respectively arranged along a bottom surface and at least one of the side surfaces of the plate-shaped portion. Parts of the two non-wound portions arranged along the bottom surface are electrodes.Type: ApplicationFiled: April 17, 2017Publication date: August 3, 2017Inventors: Mitsugu KAWARAI, Satoru YAMADA, Kazuyuki KIKUCHI, Tomohiro KAJIYAMA, Juichi OOKI, Motomi TAKAHASHI, Tsutomu OTSUKA
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Publication number: 20170084381Abstract: An electronic component includes a magnetic core member, a winding and a magnetic exterior body. The magnetic core member has a flat base and a core. The flat base has a top surface, a bottom surface, a first side surface and a second side surface opposite to the first side surface. The core is located on the top surface of the flat base. A winding has an edgewise coil and two non-wound flat wires that extend from the edgewise coil. A magnetic exterior body covers at least the core and the edgewise coil. The two non-wound flat wires continuously extend along the top surface, the first side surface, the bottom surface and the second side surface of the flat base in this order. The two non-wound flat wires located on the bottom surface work as electrodes.Type: ApplicationFiled: November 30, 2016Publication date: March 23, 2017Inventors: Shinichi SAKAMOTO, Zhigang CHENG, Fernando Chan Mock, Mitsugu KAWARAI
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Patent number: 9576721Abstract: An electronic component includes a magnetic core member, a winding and a magnetic exterior body. The magnetic core member has a flat base and a core. The flat base has a top surface, a bottom surface, a first side surface and a second side surface opposite to the first side surface. The core is located on the top surface of the flat base. A winding has an edgewise coil and two non-wound flat wires that extend from the edgewise coil. A magnetic exterior body covers at least the core and the edgewise coil. The two non-wound flat wires continuously extend along the top surface, the first side surface, the bottom surface and the second side surface of the flat base in this order. The two non-wound flat wires located on the bottom surface work as electrodes.Type: GrantFiled: March 13, 2014Date of Patent: February 21, 2017Assignee: Sumida CorporationInventors: Shinichi Sakamoto, Zhigang Cheng, Fernando Chan Mock, Mitsugu Kawarai
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Publication number: 20170034915Abstract: Provided are a small electronic component including: a magnetic core including at least a columnar core part; a winding coil arranged so as to surround an outer peripheral surface side of the columnar core part and formed by winding a winding wire; and a magnetic cover part formed so as to cover at least part of the magnetic core and the winding coil while following at least part of shapes of the magnetic core and the winding coil through use of a magnetic material containing a mixture of a phosphoric acid ester-based surfactant, magnetic powder, and a resin, an electronic circuit board using the small electronic component, and a method of manufacturing a small electronic component.Type: ApplicationFiled: July 13, 2016Publication date: February 2, 2017Inventors: Fumio UCHIKOBA, Tsutomu OTSUKA, Mitsugu KAWARAI, Motomi TAKAHASHI
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Patent number: 9509202Abstract: The present invention provides such a vibration generator which can obtain desired power-generation efficiency even if the vibration frequency is low. A vibration generator is provided with a vibrator which includes a plurality of magnets whose same magnetic poles are arranged by being faced to one another and which vibrates by a predetermined resonant frequency; a coil spring which supports the vibrator falling toward the gravitational direction and concurrently which vibrates the vibrator by a predetermined resonant frequency; a tubular winding bobbin in the inside of which the vibrator and the coil spring vibrate; coils which are wound on the outer circumference of the winding bobbin and which are connected in series inside groups divided into two or more; and a plurality of rectification circuits, each of which rectifies the output voltages of the coils for every one of the groups.Type: GrantFiled: January 27, 2014Date of Patent: November 29, 2016Assignee: Sumida CorporationInventor: Mitsugu Kawarai
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Publication number: 20160268036Abstract: A magnetic element including: a core including magnetic powders of volume occupancy within the range of 60-volume % to 80-volume % with respect to the whole volume, including a binder resin of volume occupancy of 12-volume % or more with respect to the whole volume and further including vacancy of volume occupancy of 8-volume % or more with respect to the whole volume; and a coil which is formed by winding a conductive wire and concurrently, which is buried into the core.Type: ApplicationFiled: March 8, 2016Publication date: September 15, 2016Inventors: Akihiko NAKAMURA, Mitsugu KAWARAI
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Publication number: 20160247626Abstract: An electronic component which includes a first side-surface and a second side-surface facing the first side-surface, including: a magnetic-body core including a plate-shaped portion and a core portion; a winding wire which includes a wound portion wound with a rectangular wire and two non-wound portions, and of which the core portion is inserted through the wound portion; a magnetic exterior body; a first electrode member including a first side-surface exposed-portion; and a second electrode member including a second side-surface exposed-portion, wherein the first side-surface exposed-portion includes a first connecting portion which extend along the height direction of the first side-surface, the first connecting portion is connected to one of the non-wound portions, the second side-surface exposed-portion includes a second connecting portion which extends along the height direction of the second side-surface, and the second connecting portion is connected to the other of the non-wound portions.Type: ApplicationFiled: February 22, 2016Publication date: August 25, 2016Inventors: Mitsugu KAWARAI, Satoru YAMADA, Kazuyuki KIKUCHI, Tomohiro KAJIYAMA, Juichi OOKI, Motomi TAKAHASHI, Tsutomu OTSUKA
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Publication number: 20160075058Abstract: A manufacturing method of a coil component comprising the steps of: preparing a coil assembly body in which a coil is attached on a magnetic core and a mold body which is formed with a cavity portion in the inside thereof and which includes at least one opening portion, putting a viscous admixture including magnetic powders and thermosetting resin and the coil assembly body in the cavity portion, pushing the put-in viscous admixture in the mold body, and thermally-curing the pushed-in viscous admixture and forming a magnetic exterior body which covers the coil assembly body.Type: ApplicationFiled: September 4, 2015Publication date: March 17, 2016Inventors: Motomi TAKAHASHI, Tomohiro KAJIYAMA, Teruaki TANAKA, Shinichi SAKAMOTO, Juichi OKI, Mitsugu KAWARAI, Tsutomu OTSUKA
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Patent number: 9257891Abstract: A vibration type electromagnetic generator is formed by a nonmagnetic material and includes a hollow first pipe whose both end portions are closed, a magneto coil which is wound around the periphery of the first pipe and which is provided with solenoid coils, and a movable magnet which is arranged inside the first pipe and which is movable along a winding axis direction of a magneto coil. Then, the movable magnet includes a plurality of magnets and a magnet fixing unit composed of a nonmagnetic body for fixing the plurality of magnets whose same magnetic poles are facing one another, and among the plurality of solenoid coils, the coil length of one or more solenoid coils are made to be length equal to or greater than the magnet length of the magnet.Type: GrantFiled: August 27, 2010Date of Patent: February 9, 2016Assignee: SUMIDA CORPORATIONInventor: Mitsugu Kawarai
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Patent number: 9240710Abstract: A vibration-powered generator (100) has a vibrating element (10) and a coil (40) arranged therearound, and is configured to obtain electromotive force by moving the vibrating element (10) relatively to the coil (40). The vibrating element (10) has a plurality of magnets (20a to 20d) arranged so as to oppose the pole-faces of the same polarity; end supporting portions (12, 13) which support the plurality of magnets from both ends in the direction of arrangement; and a cushioning (16). The cushioning (16) is held between the end supporting portion (12) and the magnet (20c), while being compressed under a stress exceeding the repelling force between the pole-faces of the magnets, so as to keep the magnets (20a to 20d) in a row without leaving a gap in between, overcoming the repelling force.Type: GrantFiled: March 21, 2012Date of Patent: January 19, 2016Assignee: SUMIDA CORPORATIONInventors: Mitsugu Kawarai, Takayuki Yamaguchi, Ryuta Iijima, Ryoya Takahashi, Keisuke Nishihara
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Patent number: 9167682Abstract: An electronic component includes a circuit board that includes a ground terminal connected to a ground potential, a coil component that is assembled on the circuit board, the coil component includes a T-shaped core and an air-core coil, a ground connection electrode that is assembled on the circuit board next to the coil component and that is connected to the ground terminal, and a mixture of a metal composite magnetic material and a resin that is formed on the circuit board and that covers the coil component and the ground connection electrode as a package. A part of the ground connection electrode is exposed outside the mixture.Type: GrantFiled: August 21, 2013Date of Patent: October 20, 2015Assignee: Sumida CorporationInventors: Mitsugu Kawarai, Douglas James Malcolm
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Publication number: 20150055311Abstract: An electronic component includes a circuit board that includes a ground terminal connected to a ground potential, a coil component that is assembled on the circuit board, the coil component includes a T-shaped core and an air-core coil, a ground connection electrode that is assembled on the circuit board next to the coil component and that is connected to the ground terminal, and a mixture of a metal composite magnetic material and a resin that is formed on the circuit board and that covers the coil component and the ground connection electrode as a package. A part of the ground connection electrode is exposed outside the mixture.Type: ApplicationFiled: August 21, 2013Publication date: February 26, 2015Applicant: SUMIDA CorporationInventors: Mitsugu KAWARAI, Douglas James MALCOLM
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Publication number: 20140266541Abstract: An electronic component includes a magnetic core member, a winding and a magnetic exterior body. The magnetic core member has a flat base and a core. The flat base has a top surface, a bottom surface, a first side surface and a second side surface opposite to the first side surface. The core is located on the top surface of the flat base. A winding has an edgewise coil and two non-wound flat wires that extend from the edgewise coil. A magnetic exterior body covers at least the core and the edgewise coil. The two non-wound flat wires continuously extend along the top surface, the first side surface, the bottom surface and the second side surface of the flat base in this order. The two non-wound flat wires located on the bottom surface work as electrodes.Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Applicant: SUMIDA CorporationInventors: Shinichi SAKAMOTO, Zhigang CHENG, Fernando Chan Mock, Mitsugu KAWARAI
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Publication number: 20140139052Abstract: The present invention provides such a vibration generator which can obtain desired power-generation efficiency even if the vibration frequency is low. A vibration generator is provided with a vibrator which includes a plurality of magnets whose same magnetic poles are arranged by being faced to one another and which vibrates by a predetermined resonant frequency; a coil spring which supports the vibrator falling toward the gravitational direction and concurrently which vibrates the vibrator by a predetermined resonant frequency; a tubular winding bobbin in the inside of which the vibrator and the coil spring vibrate; coils which are wound on the outer circumference of the winding bobbin and which are connected in series inside groups divided into two or more; and a plurality of rectification circuits, each of which rectifies the output voltages of the coils for every one of the groups.Type: ApplicationFiled: January 27, 2014Publication date: May 22, 2014Applicant: SUMIDA CorporationInventor: Mitsugu KAWARAI