Patents by Inventor Nobuo Kitajima
Nobuo Kitajima 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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Publication number: 20240145151Abstract: Provided is a coil component including a core member and a wire wound around the core member, wherein a cross section of the core member perpendicular to a winding axis of the wire wound around the core member has a circumference shape comprising at least three first arcs and connecting lines connecting the at least three first arcs adjacent to each other, and each of the at least three first arcs has a predetermined radius and a predetermined central angle for closely contacting the wire and the core member.Type: ApplicationFiled: October 31, 2023Publication date: May 2, 2024Applicant: TDK CORPORATIONInventors: Masayoshi SHIMAZAKI, Osamu OHHATA, Naoto TSUKAMOTO, Sena YOSHINO, Nobuo KITAJIMA, Masashi GOTOH
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Publication number: 20230117965Abstract: Provided is a solder composition containing Sn. The composition comprises: 1.0% by mass or more and 5.0% by mass or less of Cu; 0.1% by mass or more and 0.5% by mass or less of Ni; and more than 0.01% by mass and 0.5% by mass or less of Ge.Type: ApplicationFiled: October 13, 2022Publication date: April 20, 2023Applicant: TDK CORPORATIONInventors: Makoto ONO, Nobuo KITAJIMA
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Publication number: 20220399156Abstract: A highly reliable coil device is provided. An inductor 1 includes: a core 8; a coil 2 embedded inside the core 8; and terminals 4a and 4b provided with wire connecting portions 42a and 42b, to which lead-out portions 3a and 3b of the coil 2 are connected, the wire connecting portions 42a and 42b being disposed inside the core 8, in which the terminals 4a and 4b are disposed inside the core 8, and the terminals 4a and 4b include base portions 41a and 41b on which a second end portion 2b of the coil 2 in a winding axis direction is provided.Type: ApplicationFiled: July 14, 2021Publication date: December 15, 2022Applicant: TDK CORPORATIONInventors: Kazunori ARIMITSU, Nobuo KITAJIMA
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Publication number: 20220399157Abstract: A highly reliable coil device is provided. An inductor 1 includes a coil 2 formed of a flat wire, a first terminal 4a including a first wire connecting portion 42a formed with a first accommodation recessed portion 421a in which a first lead-out portion 3a of the coil 2 is accommodated, and a second terminal 4b including a second wire connecting portion 42b formed with a second accommodation recessed portion 421b in which a second lead-out portion 3b of the coil 2 is accommodated, in which the first accommodation recessed portion 421a and the second accommodation recessed portion 421b are displaced from each other along a winding axis direction of the coil 2.Type: ApplicationFiled: July 14, 2021Publication date: December 15, 2022Applicant: TDK CORPORATIONInventors: Kazunori ARIMITSU, Nobuo KITAJIMA, Fuyuki MIURA, Takehiko NARISAWA, Kiichi FUJISAWA
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Publication number: 20220020527Abstract: An inductor includes a coreless coil and terminals connected to end portions of the coreless coil. Positioning portions regulating the position of the coreless coil are formed at the terminals.Type: ApplicationFiled: July 14, 2021Publication date: January 20, 2022Applicant: TDK CORPORATIONInventors: Kazunori ARIMITSU, Nobuo KITAJIMA
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Publication number: 20220020528Abstract: An inductor includes: a coil; terminals connected to end portions of the coil; a first core having a columnar portion where the coil is disposed and a base portion having an upper surface where the columnar portion is formed; and a second core covering the upper surface of the base portion together with the coil. The terminals are disposed on the upper surface of the base portion.Type: ApplicationFiled: July 14, 2021Publication date: January 20, 2022Applicant: TDK CORPORATIONInventors: Kazunori ARIMITSU, Nobuo KITAJIMA
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Patent number: 10361025Abstract: A transformer 10 comprises a bobbin 20. A cylinder portion 28 of the bobbin 20 is provided with a first winding part 35 where a first wire 37 is wound and a second winding part 36 where a second wire 38 is wound at a position different from the first winding part 35 in an axial direction. At an outer circumference of the cylinder portion 28 located between the first winding part 35 and the second winding part 36, an insulating partition collar 30 is formed. On the first winding part 35, a winding partition collar 33, separating in respective sections S1, S2, is formed. On the winding partition collar 33, at least one communication groove 33a, communicating the sections S1, S2 adjacent to each other is formed. The first wire 37 is ?-wound around the first winding part 35.Type: GrantFiled: July 19, 2016Date of Patent: July 23, 2019Assignee: TDK CORPORATIONInventors: Masaaki Iwakura, Katsumi Kobayashi, Masaru Kumagai, Nobuo Kitajima, Satoshi Shinbo
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Patent number: 10096421Abstract: A coil device includes a bobbin, a first winding part, and a second winding part. A partition portion is formed on an outer peripheral surface of the bobbin. The first winding part is wound around the outer peripheral surface at one side of the partition portion. The second winding part is wound around the outer peripheral surface at the other side of the partition portion and has an inner winding layer and an outer winding layer located farther to the outer peripheral surface at the other side than the inner winding layer.Type: GrantFiled: August 22, 2017Date of Patent: October 9, 2018Assignee: TDK CORPORATIONInventors: Masaaki Iwakura, Katsuhiro Ishigaki, Hiroshi Maeda, Satoshi Shinbo, Nobuo Kitajima
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Publication number: 20170352474Abstract: A coil device includes a bobbin, a first winding part, and a second winding part. A partition portion is formed on an outer peripheral surface of the bobbin. The first winding part is wound around the outer peripheral surface at one side of the partition portion. The second winding part is wound around the outer peripheral surface at the other side of the partition portion and has an inner winding layer and an outer winding layer located farther to the outer peripheral surface at the other side than the inner winding layer.Type: ApplicationFiled: August 22, 2017Publication date: December 7, 2017Inventors: Masaaki IWAKURA, Katsuhiro ISHIGAKI, Hiroshi MAEDA, Satoshi SHINBO, Nobuo KITAJIMA
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Patent number: 9793044Abstract: A coil device includes a bobbin, a first winding part, and a second winding part. A partition portion is formed on an outer peripheral surface of the bobbin. The first winding part is wound around the outer peripheral surface at one side of the partition portion. The second winding part is wound around the outer peripheral surface at the other side of the partition portion and has an inner winding layer and an outer winding layer located farther to the outer peripheral surface at the other side than the inner winding layer.Type: GrantFiled: March 21, 2016Date of Patent: October 17, 2017Assignee: TDK CorporationInventors: Masaaki Iwakura, Katsuhiro Ishigaki, Hiroshi Maeda, Satoshi Shinbo, Nobuo Kitajima
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Publication number: 20160329148Abstract: A transformer 10 comprises a bobbin 20. A cylinder portion 28 of the bobbin 20 is provided with a first winding part 35 where a first wire 37 is wound and a second winding part 36 where a second wire 38 is wound at a position different from the first winding part 35 in an axial direction. At an outer circumference of the cylinder portion 28 located between the first winding part 35 and the second winding part 36, an insulating partition collar 30 is formed. On the first winding part 35, a winding partition collar 33, separating in respective sections S1, S2, is formed. On the winding partition collar 33, at least one communication groove 33a, communicating the sections S1, S2 adjacent to each other is formed. The first wire 37 is a-wound around the first winding part 35.Type: ApplicationFiled: July 19, 2016Publication date: November 10, 2016Inventors: Masaaki IWAKURA, Katsumi Kobayashi, MASARU KUMAGAI, NOBUO KITAJIMA, SATOSHI SHINBO
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Publication number: 20160293317Abstract: A coil device includes a bobbin, a first winding part, and a second winding part. A partition portion is formed on an outer peripheral surface of the bobbin. The first winding part is wound around the outer peripheral surface at one side of the partition portion. The second winding part is wound around the outer peripheral surface at the other side of the partition portion and has an inner winding layer and an outer winding layer located farther to the outer peripheral surface at the other side than the inner winding layer.Type: ApplicationFiled: March 21, 2016Publication date: October 6, 2016Inventors: Masaaki IWAKURA, Katsuhiro ISHIGAKI, Hiroshi MAEDA, Satoshi SINBO, Nobuo KITAJIMA
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Patent number: 9424982Abstract: A transformer 10 comprises a bobbin 20. A cylinder portion 28 of the bobbin 20 is provided with a first winding part 35 where a first wire 37 is wound and a second winding part 36 where a second wire 38 is wound at a position different from the first winding part 35 in an axial direction. At an outer circumference of the cylinder portion 28 located between the first winding part 35 and the second winding part 36, an insulating partition collar 30 is formed. On the first winding part 35, a winding partition collar 33, separating in respective sections S1, S2, is formed. On the winding partition collar 33, at least one communication groove 33a, communicating the sections S1, S2 adjacent to each other is formed. The first wire 37 is ?-wound around the first winding part 35.Type: GrantFiled: August 28, 2014Date of Patent: August 23, 2016Assignee: TDK CORPORATIONInventors: Masaaki Iwakura, Katsumi Kobayashi, Masaru Kumagai, Nobuo Kitajima, Satoshi Shinbo
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Patent number: 9153371Abstract: A coil device 10 comprises a first bobbin 40 provided with a first winding part 45 at an outer circumference and a second bobbin 50 provided with a second winding part 55 at an outer circumference. A plurality of partition walls 46, separating portions of the wire 22 which are adjacent to each other along the scroll axis Z of the first wire 22 are formed on the first winding part 45 along the scroll axis at predetermined intervals. A section width w1 of each section 47, which is along the scroll axis Z, separated by the partition walls 46 is determined so that only one wire 22 can pass through. A height of the partition walls 46 is determined so that one or more of the wires 22 can pass through. At least one connecting groove 46a, connecting each section which are adjacent to each other, is formed on each partition wall 46.Type: GrantFiled: June 5, 2013Date of Patent: October 6, 2015Assignee: TDK CORPORATIONInventors: Masaaki Iwakura, Nobuo Kitajima, Katsumi Kobayashi, Satoshi Sinbo
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Publication number: 20150061808Abstract: A transformer 10 comprises a bobbin 20. A cylinder portion 28 of the bobbin 20 is provided with a first winding part 35 where a first wire 37 is wound and a second winding part 36 where a second wire 38 is wound at a position different from the first winding part 35 in an axial direction. At an outer circumference of the cylinder portion 28 located between the first winding part 35 and the second winding part 36, an insulating partition collar 30 is formed. On the first winding part 35, a winding partition collar 33, separating in respective sections S1, S2, is formed. On the winding partition collar 33, at least one communication groove 33a, communicating the sections S1, S2 adjacent to each other is formed. The first wire 37 is ?-wound around the first winding part 35.Type: ApplicationFiled: August 28, 2014Publication date: March 5, 2015Inventors: Masaaki IWAKURA, Katsumi Kobayashi, Masaru Kumagai, Nobuo Kitajima, Satoshi Shinbo
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Patent number: 8866577Abstract: The present invention provides a coil component which is possible to be thinner with less leakage flux toward upward and downward directions, and to sustain a good insulation. The coil component comprises a core including two opposing parts mutually opposing, two side legs mutually connect both ends of the two opposing parts, and a middle leg placed between the two side legs and mutually connect central parts of the two opposing parts, a primary coil, which goes around outer circumference of the middle leg, and a secondary coil, which goes around outer circumference of the primary coil, wherein; a distance between outer perimeter edge of the primary coil and inner perimeter edge of the secondary coil varies along circumferential direction.Type: GrantFiled: May 9, 2012Date of Patent: October 21, 2014Assignees: TDK Corporation, TDK Korea CorporationInventors: Hiroshi Maeda, Katsumi Kobayashi, Nobuo Kitajima, Kiho Hwang
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Publication number: 20130328654Abstract: A coil device 10 comprises a first bobbin 40 provided with a first winding part 45 at an outer circumference and a second bobbin 50 provided with a second winding part 55 at an outer circumference. A plurality of partition walls 46, separating portions of the wire 22 which are adjacent to each other along the scroll axis Z of the first wire 22 are formed on the first winding part 45 along the scroll axis at predetermined intervals. A section width w1 of each section 47, which is along the scroll axis Z, separated by the partition walls 46 is determined so that only one wire 22 can pass through. A height of the partition walls 46 is determined so that one or more of the wires 22 can pass through. At least one connecting groove 46a, connecting each section which are adjacent to each other, is formed on each partition wall 46.Type: ApplicationFiled: June 5, 2013Publication date: December 12, 2013Inventors: Masaaki IWAKURA, Nobuo KITAJIMA, Katsumi KOBAYASHI, Satoshi SINBO
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Publication number: 20120286919Abstract: The present invention provides a coil component which is possible to be thinner with less leakage flux toward upward and downward directions, and to sustain a good insulation. The coil component comprises a core including two opposing parts mutually opposing, two side legs mutually connect both ends of the two opposing parts, and a middle leg placed between the two side legs and mutually connect central parts of the two opposing parts, a primary coil, which goes around outer circumference of the middle leg, and a secondary coil, which goes around outer circumference of the primary coil, wherein; a distance between outer perimeter edge of the primary coil and inner perimeter edge of the secondary coil varies along circumferential direction.Type: ApplicationFiled: May 9, 2012Publication date: November 15, 2012Applicants: TDK KOREA CORPORATION, TDK CORPORATIONInventors: Hiroshi MAEDA, Katsumi KOBAYASHI, Nobuo KITAJIMA, Kiho HWANG
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Patent number: 8253522Abstract: A coil component includes a bobbin having a core part and a flange. The flange has a first surface on a first side and a second surface on a second side. The first surface of the flange is attached to an axial end of the core part. An end of a wire is electrically connected to a metallic terminal of a terminal-mounting member disposed on the flange. The flange is formed with a notch at a position near the terminal-mounting member, and the notch extends from a peripheral edge of the flange toward the core part. A segment of the wire near the end thereof extends from the second side to the first side of the flange through the notch and further to the core part, and this segment of the wire is hooked around the wire-supporting member in the notch.Type: GrantFiled: August 9, 2010Date of Patent: August 28, 2012Assignee: TDK CorporationInventors: Katsumi Kobayashi, Yutaka Hatakeyama, Nobuo Kitajima
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Patent number: D721651Type: GrantFiled: July 12, 2012Date of Patent: January 27, 2015Assignee: TDK CorporationInventors: Masaaki Iwakura, Katsumi Kobayashi, Nobuo Kitajima, Satoshi Shinbo