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公开(公告)号：US09894443B2
公开(公告)日：2018-02-13
申请号：US15023311
申请日：2015-08-21
Inventor： Kazuki Honda , Mitsukazu Kuze
CPC classification number: H04R9/045 , H04R7/04 , H04R7/18 , H04R9/025 , H04R9/06 , H04R2201/028 , H04R2499/13
Abstract: A loudspeaker includes a frame, a diaphragm, an edge, a magnetic circuit, and a voice coil body. The magnetic circuit includes a magnet and a bottom plate. The bottom plate includes an installation part and a plurality of arms. The installation part is located on the first side of the magnet and is magnetically connected to the magnet. The arms project from the installation part toward the outer periphery and are connected to the frame.
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公开(公告)号：US12177626B2
公开(公告)日：2024-12-24
申请号：US17967565
申请日：2022-10-17
Inventor： Satoshi Itoh , Mitsukazu Kuze , Shinya Kagawa , Kiyohisa Hattori
Abstract: An electroacoustic conversion device includes a vibration plate, an inner voice coil attached to the vibration plate, an outer voice coil attached to the vibration plate outside the inner voice coil to surround the inner voice coil, a magnet, a yoke, and the frame which holds the vibration plate and the yoke. The magnet includes a wiring portion which is in a form of a through hole or a notch in which inner signal lines for the inner voice coil are provided.
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公开(公告)号：US09961449B2
公开(公告)日：2018-05-01
申请号：US15514065
申请日：2015-10-02
Inventor： Kazuki Honda , Mitsukazu Kuze , Motoyoshi Kitagawa
CPC classification number: H04R9/06 , H04R1/02 , H04R1/025 , H04R7/06 , H04R7/18 , H04R7/20 , H04R9/025 , H04R9/04 , H04R2400/11 , H04R2499/13
Abstract: A loudspeaker includes a frame, a diaphragm, an edge connecting portion, a magnetic circuit having a magnetic gap, and a voice coil body. The edge connecting portion connects an outer peripheral end portion of the diaphragm and the frame to each other. The diaphragm is disposed inside of the frame. The diaphragm has a planer diaphragm and a reinforcing diaphragm. Both a front surface and a rear surface of the planer diaphragm are flat. The reinforcing diaphragm includes a thick portion and a recessed portion, and is joined to the planer diaphragm. The reinforcing diaphragm is made of resin. The thick portion is formed on an outer periphery of the reinforcing diaphragm. The recessed portion is formed at a center side of the reinforcing diaphragm.
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Patent Agency Ranking
公开(公告)号：US09756426B2
公开(公告)日：2017-09-05
申请号：US15023383
申请日：2015-08-17
Inventor： Hiroko Tsutsumi , Koichi Nakayama , Satoshi Koura , Kazuhiro Oshika , Mitsukazu Kuze , Tomonori Shibuya
CPC classification number: H04R9/063 , H04R1/24 , H04R7/04 , H04R7/127 , H04R7/16 , H04R7/22 , H04R7/24 , H04R9/02 , H04R2209/022 , H04R2209/024 , H04R2209/027 , H04R2307/207 , H04R2400/07 , H04R2400/11
Abstract: 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.
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公开(公告)号：US09693167B2
公开(公告)日：2017-06-27
申请号：US15023388
申请日：2015-07-03
Inventor： Kazuki Honda , Mitsukazu Kuze
IPC: H04R31/00 , H04R7/00 , H04R7/02 , H04R7/04 , H04R9/06 , H04R1/02 , H04R7/18 , H04R9/02 , H04R7/10 , H04R7/20 , H04R9/04
CPC classification number: H04R31/006 , H04R1/02 , H04R1/025 , H04R7/02 , H04R7/04 , H04R7/10 , H04R7/18 , H04R7/20 , H04R9/025 , H04R9/04 , H04R9/06 , H04R2499/13
Abstract: A loudspeaker includes a diaphragm, a voice coil body, and a magnetic circuit. The diaphragm has a first side, which is the surface of a recess defined by a thin part and a thick part formed around the thin part. The voice coil body includes a bobbin and a voice coil. The bobbin has a first end connected to the thin part on the first side of the diaphragm and a second end opposite to the first end. The magnetic circuit has an inner part, an outer part, and a magnetic gap. Part of the magnetic circuit including the first side of the inner part is located from the second end of the bobbin into the bobbin, and the first side of the inner part and the first side of the outer part are located in the recess so that the voice coil is located in the magnetic gap.
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公开(公告)号：US11218812B2
公开(公告)日：2022-01-04
申请号：US16825547
申请日：2020-03-20
Inventor： Shinya Kagawa , Mitsukazu Kuze
Abstract: A speaker device that includes: two magnetic circuits arranged side by side and each including a magnetic gap; two voice coil bodies each corresponding to a shape of the magnetic gap and arranged in the magnetic gap in an inserted state; a diaphragm to which the two voice coil bodies are coupled, the diaphragm having a width shorter than a length in a direction in which the two magnetic circuits are arranged; and a frame to which the diaphragm and the two magnetic circuits are attached. In the speaker device, the two voice coil bodies include two coils connected in series, the two coils being connected to a pair of input terminals for receiving an input of an electric signal, the pair of input terminals being disposed between the two voice coil bodies.
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7.发明授权公开(公告)号：US09781515B2
公开(公告)日：2017-10-03
申请号：US15023684
申请日：2015-08-21
Inventor： Tomonori Shibuya , Yoshiyuki Takahashi , Yoshimichi Kajihara , Tetsushi Itano , Mitsukazu Kuze , Takayuki Dan
CPC classification number: H04R7/06 , H04R7/125 , H04R9/045 , H04R9/06 , H04R2307/021 , H04R2307/029 , H04R2499/11 , Y10S977/796
Abstract: A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is composed of bamboo cellulose nanofibers and is formed at least on the first side of the base layer. The coating layer has a thickness in the range of 3% to 15%, both inclusive of the sum of the thicknesses of the base layer and the coating layer.
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公开(公告)号：US09743209B2
公开(公告)日：2017-08-22
申请号：US15023683
申请日：2015-07-03
Inventor： Kazuki Honda , Mitsukazu Kuze
IPC: H04R1/02 , H04R31/00 , H04R7/02 , H04R7/18 , H04R9/02 , H04R9/06 , H04R7/10 , H04R7/20 , H04R9/04
CPC classification number: H04R31/006 , H04R1/02 , H04R1/025 , H04R7/02 , H04R7/04 , H04R7/10 , H04R7/18 , H04R7/20 , H04R9/025 , H04R9/04 , H04R9/06 , H04R2499/13
Abstract: A loudspeaker includes a frame, a diaphragm, a voice coil body, a terminal, and a relay wire. The diaphragm includes a thin part and a thick part formed around the thin part. The voice coil body includes a bobbin and a voice coil, and is placed in the center of the diaphragm. The terminal is fixed to the frame. The relay wire is connected to the terminal and the voice coil. At least part of the relay wire is located in the thick part.
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