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).

  • Patent number: 10438737
    Abstract: 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: Grant
    Filed: November 30, 2016
    Date of Patent: October 8, 2019
    Assignee: SUMIDA CORPORATION
    Inventors: Shinichi Sakamoto, Zhigang Cheng, Fernando Chan Mock, Mitsugu Kawarai
  • Publication number: 20190304660
    Abstract: 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: Application
    Filed: March 25, 2019
    Publication date: October 3, 2019
    Inventors: Mitsugu KAWARAI, Satoru YAMADA
  • Publication number: 20180151286
    Abstract: 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: Application
    Filed: December 27, 2017
    Publication date: May 31, 2018
    Inventors: Akihiko NAKAMURA, Mitsugu KAWARAI
  • Publication number: 20180068770
    Abstract: 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: Application
    Filed: August 28, 2017
    Publication date: March 8, 2018
    Inventors: Mitsugu KAWARAI, Kazuhisa SATO
  • Publication number: 20180061558
    Abstract: 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: Application
    Filed: July 28, 2017
    Publication date: March 1, 2018
    Inventors: Yoshiyuki TAHARA, Teruaki TANAKA, Akihiko NAKAMURA, Satoru YAMADA, Mitsugu KAWARAI
  • Patent number: 9887033
    Abstract: 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: Grant
    Filed: March 8, 2016
    Date of Patent: February 6, 2018
    Assignee: SUMIDA CORPORATION
    Inventors: Akihiko Nakamura, Mitsugu Kawarai
  • Publication number: 20170221623
    Abstract: 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: Application
    Filed: April 17, 2017
    Publication date: August 3, 2017
    Inventors: Mitsugu KAWARAI, Satoru YAMADA, Kazuyuki KIKUCHI, Tomohiro KAJIYAMA, Juichi OOKI, Motomi TAKAHASHI, Tsutomu OTSUKA
  • Publication number: 20170084381
    Abstract: 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: Application
    Filed: November 30, 2016
    Publication date: March 23, 2017
    Inventors: Shinichi SAKAMOTO, Zhigang CHENG, Fernando Chan Mock, Mitsugu KAWARAI
  • Patent number: 9576721
    Abstract: 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: Grant
    Filed: March 13, 2014
    Date of Patent: February 21, 2017
    Assignee: Sumida Corporation
    Inventors: Shinichi Sakamoto, Zhigang Cheng, Fernando Chan Mock, Mitsugu Kawarai
  • Publication number: 20170034915
    Abstract: 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: Application
    Filed: July 13, 2016
    Publication date: February 2, 2017
    Inventors: Fumio UCHIKOBA, Tsutomu OTSUKA, Mitsugu KAWARAI, Motomi TAKAHASHI
  • Patent number: 9509202
    Abstract: 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: Grant
    Filed: January 27, 2014
    Date of Patent: November 29, 2016
    Assignee: Sumida Corporation
    Inventor: Mitsugu Kawarai
  • Publication number: 20160268036
    Abstract: 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: Application
    Filed: March 8, 2016
    Publication date: September 15, 2016
    Inventors: Akihiko NAKAMURA, Mitsugu KAWARAI
  • Publication number: 20160247626
    Abstract: 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: Application
    Filed: February 22, 2016
    Publication date: August 25, 2016
    Inventors: Mitsugu KAWARAI, Satoru YAMADA, Kazuyuki KIKUCHI, Tomohiro KAJIYAMA, Juichi OOKI, Motomi TAKAHASHI, Tsutomu OTSUKA
  • Publication number: 20160075058
    Abstract: 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: Application
    Filed: September 4, 2015
    Publication date: March 17, 2016
    Inventors: Motomi TAKAHASHI, Tomohiro KAJIYAMA, Teruaki TANAKA, Shinichi SAKAMOTO, Juichi OKI, Mitsugu KAWARAI, Tsutomu OTSUKA
  • Patent number: 9257891
    Abstract: 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: Grant
    Filed: August 27, 2010
    Date of Patent: February 9, 2016
    Assignee: SUMIDA CORPORATION
    Inventor: Mitsugu Kawarai
  • Patent number: 9240710
    Abstract: 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: Grant
    Filed: March 21, 2012
    Date of Patent: January 19, 2016
    Assignee: SUMIDA CORPORATION
    Inventors: Mitsugu Kawarai, Takayuki Yamaguchi, Ryuta Iijima, Ryoya Takahashi, Keisuke Nishihara
  • Patent number: 9167682
    Abstract: 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: Grant
    Filed: August 21, 2013
    Date of Patent: October 20, 2015
    Assignee: Sumida Corporation
    Inventors: Mitsugu Kawarai, Douglas James Malcolm
  • Publication number: 20150055311
    Abstract: 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: Application
    Filed: August 21, 2013
    Publication date: February 26, 2015
    Applicant: SUMIDA Corporation
    Inventors: Mitsugu KAWARAI, Douglas James MALCOLM
  • Publication number: 20140266541
    Abstract: 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: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: SUMIDA Corporation
    Inventors: Shinichi SAKAMOTO, Zhigang CHENG, Fernando Chan Mock, Mitsugu KAWARAI
  • Publication number: 20140139052
    Abstract: 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: Application
    Filed: January 27, 2014
    Publication date: May 22, 2014
    Applicant: SUMIDA Corporation
    Inventor: Mitsugu KAWARAI