Patents by Inventor Satoshi Koura
Satoshi Koura 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: 10531170Abstract: A loudspeaker device includes a loudspeaker, a box, and a lid. The box is provided with an opening and accommodates the loudspeaker. The lid covers the opening of the box. The lid includes a grille with one or more hexagonal holes each having an opening area equal to the area of a circle with a diameter in a range from 6.0 mm to 9.0 mm, inclusive.Type: GrantFiled: August 23, 2017Date of Patent: January 7, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshimichi Kajihara, Takuji Miyamoto, Yuuki Izumi, Satoshi Koura
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Publication number: 20190200110Abstract: A loudspeaker device includes a loudspeaker, a box, and a lid. The box is provided with an opening and accommodates the loudspeaker. The lid covers the opening of the box. The lid includes a grille with one or more hexagonal holes each having an opening area equal to the area of a circle with a diameter in a range from 6.0 mm to 9.0 mm, inclusive.Type: ApplicationFiled: August 23, 2017Publication date: June 27, 2019Inventors: YOSHIMICHI KAJIHARA, TAKUJI MIYAMOTO, YUUKI IZUMI, SATOSHI KOURA
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Patent number: 10104475Abstract: A magnetic circuit includes: a magnet including a first and a second surface; a top plate disposed on the first surface; a bottom plate coupled magnetically with the second surface; and a yoke coupled magnetically with the bottom plate and disposed so as to protrude from the bottom plate along a first direction. The second surface is parallel to the first surface. The first and the second surfaces are magnetized. The yoke includes a magnetic pole face that opposes the top plate. In a portion where the magnetic pole face is formed, of the yoke, a magnetic saturation part is disposed to generate magnetic saturation. The magnetic saturation part has a shape in which an area of a cross section perpendicular to the first direction decreases with nearness to a tip of the yoke along the first direction.Type: GrantFiled: April 25, 2017Date of Patent: October 16, 2018Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yuuki Izumi, Satoshi Koura, Tomonori Shibuya
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Publication number: 20170280248Abstract: An object of the present disclosure is to provide a loudspeaker with small distortion. In order to achieve the object, a magnetic circuit of the present disclosure includes a yoke having a first facing part and a magnetic part having a second facing part. The magnetic part supplies magnetic force to a magnetic gap. The second facing part faces the first facing part through a magnetic gap. A second upper end of the second facing part is disposed so as to be separated by a first distance from a first upper end of the first facing part. Meanwhile, a second lower end of the second facing part is disposed so as to be separated by a greater distance than the first distance from a first lower end of the first facing part.Type: ApplicationFiled: September 25, 2015Publication date: September 28, 2017Inventors: MITSUKAZU KUZE, HIDEAKI INOUE, SATOSHI KOURA, TOMONORI SHIBUYA, TAKAYUKI DAN, TETSUSHI ITANO
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Patent number: 9756426Abstract: A loudspeaker includes a diaphragm body having a dome shape protruding upwardly, a magnetic circuit disposed below the diaphragm body, a voice coil coupled to the diaphragm body, an edge coupled to an outer circumference of the diaphragm body, and a frame coupled to the edge. The edge includes a first coupling portion provided at an outer circumference of the edge, a second coupling portion provided at an inner circumference of the edge and coupled to an outer circumference of the diaphragm body, and a roll portion disposed between the first coupling portion and the second coupling portion. The edge has a surface facing downward. The frame has a connecting surface disposed below the second coupling portion and coupled to the surface of the edge at the first coupling portion of the edge. This loudspeaker can decrease distortion of sound.Type: GrantFiled: August 17, 2015Date of Patent: September 5, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hiroko Tsutsumi, Koichi Nakayama, Satoshi Koura, Kazuhiro Oshika, Mitsukazu Kuze, Tomonori Shibuya
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Publication number: 20170230755Abstract: A magnetic circuit includes: a magnet including a first and a second surface; a top plate disposed on the first surface; a bottom plate coupled magnetically with the second surface; and a yoke coupled magnetically with the bottom plate and disposed so as to protrude from the bottom plate along a first direction. The second surface is parallel to the first surface. The first and the second surfaces are magnetized. The yoke includes a magnetic pole face that opposes the top plate. In a portion where the magnetic pole face is formed, of the yoke, a magnetic saturation part is disposed to generate magnetic saturation. The magnetic saturation part has a shape in which an area of a cross section perpendicular to the first direction decreases with nearness to a tip of the yoke along the first direction.Type: ApplicationFiled: April 25, 2017Publication date: August 10, 2017Inventors: YUUKI IZUMI, SATOSHI KOURA, TOMONORI SHIBUYA
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Publication number: 20170180868Abstract: A loudspeaker includes a frame, a diaphragm, a magnetic circuit, a voice coil body, and a cover. The magnetic circuit includes a first surface facing a diaphragm, a second surface opposite to the first surface, a magnetic gap, a through-hole, and a first corner portion. The through-hole penetrates between the first surface and the second surface. The first corner portion has a first radius of curvature, and formed in such a manner as to extend over a section facing the through-hole and at least one of the first surface and the second surface. The cover has a second corner portion having a second radius of curvature larger than the first radius of curvature, and formed so as to cover at least a part of the first corner portion.Type: ApplicationFiled: September 14, 2015Publication date: June 22, 2017Inventors: MITSUKAZU KUZE, HIDEAKI INOUE, SATOSHI KOURA, TOMONORI SHIBUYA, TAKAYUKI DAN
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Patent number: 9462213Abstract: A video display device includes a video display panel that displays video, a case that encloses an outer periphery of the video display panel, an audio device that is arranged in proximity to the outer periphery of the video display panel, the audio device being configured to linearly arrange a plurality of speakers, and a sound emitting hole that corresponds to an opening of the audio device, the sound emitting hole being provided to the case and emitting sound generated by the audio device.Type: GrantFiled: January 14, 2013Date of Patent: October 4, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Kenji Yamauchi, Satoshi Koura, Yachiyo Shimokawatoko, Masatoshi Okuyama, Masahiro Yukawa, Taketo Kawauchi, Ken Miura, Satoshi Takayama, Shoji Nakajima, Hideaki Inoue, Mitsukazu Kuze
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Publication number: 20160219371Abstract: A loudspeaker includes a diaphragm body having a dome shape protruding upwardly, a magnetic circuit disposed below the diaphragm body, a voice coil coupled to the diaphragm body, an edge coupled to an outer circumference of the diaphragm body, and a frame coupled to the edge. The edge includes a first coupling portion provided at an outer circumference of the edge, a second coupling portion provided at an inner circumference of the edge and coupled to an outer circumference of the diaphragm body, and a roll portion disposed between the first coupling portion and the second coupling portion. The edge has a surface facing downward. The frame has a connecting surface disposed below the second coupling portion and coupled to the surface of the edge at the first coupling portion of the edge. This loudspeaker can decrease distortion of sound.Type: ApplicationFiled: August 17, 2015Publication date: July 28, 2016Inventors: HIROKO TSUTSUMI, KOICHI NAKAYAMA, SATOSHI KOURA, KAZUHIRO OSHIKA, MITSUKAZU KUZE, TOMONORI SHIBUYA
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Patent number: 9277304Abstract: The loudspeaker magnetic circuit is an external-magnet type, and has a magnet, an upper plate, and a lower plate. The magnet is sandwiched between the upper plate and the lower plate. At least one of the lower plate and the upper plate is formed of magnetic powder or a mixture of a magnetic powder and resin.Type: GrantFiled: August 7, 2014Date of Patent: March 1, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Mitsukazu Kuze, Satoshi Koura, Shinya Mizone, Goro Tsuchiya, Tetsushi Itano
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Publication number: 20140348374Abstract: The loudspeaker magnetic circuit is an external-magnet type, and has a magnet, an upper plate, and a lower plate. The magnet is sandwiched between the upper plate and the lower plate. At least one of the lower plate and the upper plate is formed of magnetic powder or a mixture of a magnetic powder and resin.Type: ApplicationFiled: August 7, 2014Publication date: November 27, 2014Inventors: MITSUKAZU KUZE, SATOSHI KOURA, SHINYA MIZONE, GORO TSUCHIYA, TETSUSHI ITANO
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Patent number: 8879758Abstract: A loudspeaker includes a back panel and a plurality of thin loudspeakers mounted onto the back panel. The back panel has an aspect ratio of 6 or higher, and has a wiring unit formed thereon and wire-connecting the thin loudspeakers. The thin loudspeakers are arranged on the back panel in series in a straight line. Accordingly, a thin-type loudspeaker can be realized.Type: GrantFiled: August 22, 2013Date of Patent: November 4, 2014Assignee: Panasonic CorporationInventors: Kenji Yamauchi, Masatoshi Okuyama, Satoshi Takayama, Satoshi Koura, Shoji Nakajima, Yachiyo Shimokawatoko, Hideaki Inoue, Mitsutaka Enomoto
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Patent number: 8818006Abstract: A loudspeaker system includes an enclosure surrounding a plurality of loudspeakers. The plurality of loudspeakers are disposed in series along a straight line in the enclosure. The enclosure includes a front panel, a back panel and side panels. The front panel, the side panels, and the back panel are disposed parallel to the straight line on which the loudspeakers are arranged. The side panels are provided with a front slit and a back slit. The back slit is disposed at an opposite side of the front slit in the enclosure. Sounds emitted to the upper and lower sides of diaphragms of the loudspeakers are separated from each other such that the sounds are prevented from mixing with each other. This provides a loudspeaker system capable of achieving desired sound pressure-frequency characteristics.Type: GrantFiled: September 25, 2013Date of Patent: August 26, 2014Assignee: Panasonic CorporationInventors: Kenji Yamauchi, Masatoshi Okuyama, Shoji Nakajima, Satoshi Takayama, Satoshi Koura, Yachiyo Shimokawatoko, Kazuhiro Oshika, Hideaki Inoue
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Publication number: 20140056468Abstract: A magnetic circuit for a loudspeaker includes a magnet and a top plate. The magnet is made of a bonded magnet. The magnet and the top plate are configured to satisfy at least one of conditions that an inner diameter of the magnet is identical to an inner diameter of the top plate, and that an outer diameter of the magnet is identical to an outer diameter of the top plate. This configuration eliminates a wasted space inside the magnetic circuit, and protrusion of the magnet to outside, hence providing a light and efficient magnetic circuit.Type: ApplicationFiled: January 15, 2013Publication date: February 27, 2014Applicant: Panasonic CorporationInventors: Mitsukazu Kuze, Satoshi Koura, Goro Tsuchiya, Tetsushi Itano
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Publication number: 20140029779Abstract: A loudspeaker system includes an enclosure surrounding a plurality of loudspeakers. The plurality of loudspeakers are disposed in series along a straight line in the enclosure. The enclosure includes a front panel, a back panel and side panels. The front panel, the side panels, and the back panel are disposed parallel to the straight line on which the loudspeakers are arranged. The side panels are provided with a front slit and a back slit. The back slit is disposed at an opposite side of the front slit in the enclosure. Sounds emitted to the upper and lower sides of diaphragms of the loudspeakers are separated from each other such that the sounds are prevented from mixing with each other. This provides a loudspeaker system capable of achieving desired sound pressure-frequency characteristics.Type: ApplicationFiled: September 25, 2013Publication date: January 30, 2014Applicant: Panasonic CorporationInventors: KENJI YAMAUCHI, MASATOSHI OKUYAMA, SHOJI NAKAJIMA, SATOSHI TAKAYAMA, SATOSHI KOURA, YACHIYO SHIMOKAWATOKO, KAZUHIRO OSHIKA, HIDEAKI INOUE
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Publication number: 20130336518Abstract: A loudspeaker includes a back panel and a plurality of thin loudspeakers mounted onto the back panel. The back panel has an aspect ratio of 6 or higher, and has a wiring unit formed thereon and wire-connecting the thin loudspeakers. The thin loudspeakers are arranged on the back panel in series in a straight line. Accordingly, a thin-type loudspeaker can be realized.Type: ApplicationFiled: August 22, 2013Publication date: December 19, 2013Applicant: Panasonic CorporationInventors: KENJI YAMAUCHI, MASATOSHI OKUYAMA, SATOSHI TAKAYAMA, SATOSHI KOURA, SHOJI NAKAJIMA, YACHIYO SHIMOKAWATOKO, HIDEAKI INOUE, MITSUTAKA ENOMOTO
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Patent number: 8553924Abstract: According to the present invention, there is provided a speaker for use in audio/video apparatuses and a small-sized speaker device capable of realizing preferable reproduction a bass sounds. In order to attain this, in the present invention, a pressure adjusting body is coupled to a portion of a magnetic circuit or a frame, which is a component of a speaker unit, to constitute the speaker unit. The speaker unit is mounted to a small-sized cabinet to constitute a speaker device, which enables realization of preferable reproduction of bass sounds.Type: GrantFiled: June 11, 2007Date of Patent: October 8, 2013Assignee: Panasonic CorporationInventors: Masahide Sumiyama, Satoshi Koura, Yoshimichi Kajihara, Koji Sano, Kazuki Honda, Satoshi Itoh, Shuji Saiki, Toshiyuki Matsumura, Shinya Mizone
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Patent number: 8265330Abstract: A material for improving the sound pressure level at the bass reproduction limit of the present invention is composed of an activated carbon having a cumulative pore volume of 0.4 ml/g or more for the pores each having a radius of 50 angstroms or less. Preferably, this activated carbon has a cumulative pore volume of 0.1 ml/g or less for the pores each having a radius of 7 angstroms or less. In particular, when a sound pressure level improving material in which the activated carbon has a cumulative pore volume of 0.5 ml/g or more for the pores each having a radius of 18 angstroms or less is installed in a cabinet of a loudspeaker device, the material alleviates pressure fluctuations of a gas within the cabinet caused by vibration of a loudspeaker, and thus a very good bass reproduction effect is attained. Moreover, in the case where a sound pressure level improving material in which the activated carbon has a cumulative pore volume of 0.Type: GrantFiled: July 4, 2008Date of Patent: September 11, 2012Assignees: Kuraray Chemical Co., Ltd., Panasonic CorporationInventors: Yoshiharu Fukunishi, Takanori Kitamura, Kengo Tabata, Toshiyuki Matsumura, Shuji Saiki, Yoshimichi Kajihara, Satoshi Koura
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Patent number: 8103036Abstract: A loudspeaker device includes a loudspeaker box having a space therein, a loudspeaker unit, and a passive radiator. The loudspeaker unit and the passive radiator are attached to the loudspeaker box. The space of the loudspeaker box has a depth smaller on the passive radiator side than on the loudspeaker unit side. This structure allows the loudspeaker device to be mounted on a thin apparatus.Type: GrantFiled: March 19, 2007Date of Patent: January 24, 2012Assignee: Panasonic CorporationInventors: Toshiyuki Koike, Satoshi Koura
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Publication number: 20100289968Abstract: A loudspeaker device includes a loudspeaker box having a space therein, a loudspeaker unit, and a passive radiator. The loudspeaker unit and the passive radiator are attached to the loudspeaker box. The space of the loudspeaker box has a depth smaller on the passive radiator side than on the loudspeaker unit side. This structure allows the loudspeaker device to be mounted on a thin apparatus.Type: ApplicationFiled: March 19, 2007Publication date: November 18, 2010Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Toshiyuki Koike, Satoshi Koura