Patents by Inventor Mitsukazu Kuze
Mitsukazu Kuze 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: 20100092004Abstract: The loudspeaker device according to the present invention comprises a loudspeaker; a feedforward processing section for performing feedforward processing on an electric signal to be inputted to the loudspeaker based on a preset filter coefficient so that non-linear distortion which occurs from the loudspeaker is removed; and a feedback processing section for detecting vibration of the loudspeaker, and performing feedback processing on an electric signal concerning the vibration with respect to the electric signal to be inputted to the loudspeaker. The feedback processing section performs feedback processing on the electric signal concerning the vibration so that the non-linear distortion which occurs from the loudspeaker is removed and so that a frequency characteristic concerning the vibration of the loudspeaker becomes a predetermined frequency characteristic.Type: ApplicationFiled: July 28, 2006Publication date: April 15, 2010Inventor: Mitsukazu Kuze
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Publication number: 20090316920Abstract: A speaker device includes a cabinet, a speaker unit, a port, a cartridge, and an adsorbent material. The adsorbent material is disposed in the interior of the cartridge. The cartridge is a container removable from the cabinet. When the adsorbent material is deteriorated, the cartridge is replaced or the adsorbent material is reactivated, thereby making it possible to maintain, over a long period of time, the effect of physical adsorption provided by the adsorbent material.Type: ApplicationFiled: September 3, 2009Publication date: December 24, 2009Inventors: Toshiyuki MATSUMURA, Shuji Saiki, Sawako Kano, Mitsukazu Kuze
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Patent number: 7477755Abstract: A speaker system according to the present invention comprises a cabinet (10), a speaker unit (11), a first parting board (12), a drone cone (13), an adsorption member (14), a second parting board (15), a backboard (16), a variable mechanism (17), and a port (18). A sound pressure generated by the speaker unit (11) causes a pressure variation in a second chamber (R12) via the drone cone (13). The adsorption member (14) with an effect of physical adsorption is operable to suppress the pressure variation. Furthermore, by displacing the diaphragm (171), the variable mechanism (17) is operable to reduce a pressure variation of a direct current component, which is caused by variations in ambient temperature or atmospheric pressure of the speaker system.Type: GrantFiled: March 23, 2005Date of Patent: January 13, 2009Assignee: Panasonic CorporationInventors: Shuji Saiki, Mitsukazu Kuze, Toshiyuki Matsumura, Sawako Kano
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Patent number: 7463747Abstract: A loudspeaker unit (2) of a loudspeaker system (1) is fitted to a cabinet (4). An absorbent (3) is disposed in a hollow chamber (R) inside the cabinet (4) and absorbs a gas inside the hollow chamber (R). A phase inverting mechanism (8) inverts the phase by resonating with a sound of a specific frequency radiated from the loudspeaker unit (2) into the hollow chamber (R) and radiates this sound to outside. The watertight means of the phase inverting mechanism (8) prevents invasion of moisture into inside the hollow chamber (R) from outside the cabinet (4) through the phase inverting mechanism (8).Type: GrantFiled: March 24, 2005Date of Patent: December 9, 2008Assignee: Panasonic CorporationInventors: Mitsukazu Kuze, Shuji Saiki, Sawako Kano, Toshiyuki Matsumura
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Publication number: 20070286449Abstract: A loudspeaker system comprises a cabinet (11), a speaker unit (12), a package body (13), a filler gas (15), and an absorbent (14). The speaker unit (12) is mounted in the cabinet (11). At least one package body (13) is disposed in a vacant space (Ra) inside of the cabinet (11) and is structured by a bag body for sealing materials thereinto from outside thereof. A predetermined amount of the filler gas (15) is sealed into the package body (13). A predetermined amount of the absorbent (14) is sealed into the package body (13) and physically absorbs the filler gas (15).Type: ApplicationFiled: August 19, 2005Publication date: December 13, 2007Inventors: Toshiyuki Matsumura, Shuji Saiki, Sawako Kano, Mitsukazu Kuze
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Publication number: 20070165895Abstract: A speaker device includes a cabinet (10), a speaker unit (11), a port (12), a cartridge (13), and an adsorbent material (14). The adsorbent material (14) is disposed in the interior of the cartridge (13). The cartridge (13) is a container removable from the cabinet (10). When the adsorbent material (14) is deteriorated, the cartridge (13) is replaced or the adsorbent material (14) is reactivated, thereby making it possible to maintain, over a long period of time, the effect of physical adsorption provided by the adsorbent material (14).Type: ApplicationFiled: April 12, 2005Publication date: July 19, 2007Inventors: Toshiyuki Matsumura, Shuji Saiki, Sawako Kano, Mitsukazu Kuze
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Publication number: 20070147645Abstract: A loudspeaker unit (2) of a loudspeaker system (1) is fitted to a cabinet (4). An absorbent (3) is disposed in a hollow chamber (R) inside the cabinet (4) and absorbs a gas inside the hollow chamber (R). A phase inverting mechanism (8) inverts the phase by resonating with a sound of a specific frequency radiated from the loudspeaker unit (2) into the hollow chamber (R) and radiates this sound to outside. The watertight means of the phase inverting mechanism (8) prevents invasion of moisture into inside the hollow chamber (R) from outside the cabinet (4) through the phase inverting mechanism (8).Type: ApplicationFiled: March 24, 2005Publication date: June 28, 2007Inventors: Mitsukazu Kuze, Shuji Saiki, Sawako Kano, Toshiyuki Matsumura
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Publication number: 20070127760Abstract: A speaker system according to the present invention comprises a cabinet (10), a speaker unit (11), a first parting board (12), a drone cone (13), an adsorption member (14), a second parting board (15), a backboard (16), a variable mechanism (17), and a port (18). A sound pressure generated by the speaker unit (11) causes a pressure variation in a second chamber (R12) via the drone cone (13). The adsorption member (14) with an effect of physical adsorption is operable to suppress the pressure variation. Furthermore, by displacing the diaphragm (171), the variable mechanism (17) is operable to reduce a pressure variation of a direct current component, which is caused by variations in ambient temperature or atmospheric pressure of the speaker system.Type: ApplicationFiled: March 23, 2005Publication date: June 7, 2007Inventors: Shuji Saiki, Mitsukazu Kuze, Toshiyuki Matsumura, Sawako Kano
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Patent number: 7054459Abstract: The surrounding structure of the loudspeaker forms an annular structure, including attaching parts and curved part. The cross section of the curved part is in a hollow and approximately elliptical form. The height along the major axis of the ellipse is made parallel to the center axis of the vibrating diaphragm of the loudspeaker while the width along the major axis of the ellipse is set in the direction orthogonal to the center axis of the vibrating diaphragm. In the elliptical surrounding structure having such a structure, the width in the cross section of the surrounding structure of the loudspeaker can be made narrow in comparison with a semi-circular surround, whereby the linearity of the amplitude and the maximum displacement are increased.Type: GrantFiled: April 8, 2003Date of Patent: May 30, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitsukazu Kuze, Hiroyuki Takewa, Mikio Iwasa
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Patent number: 6842529Abstract: A loudspeaker includes a bobbin, a coil, a magnetic circuit having a magnetic gap, a first cylinder fixed to the outer surface of the bobbin, a second cylinder connected with the first cylinder, a diaphragm and a damper coupled to the outer circumferential surface of the second cylinder, an edge coupled to the diaphragm, a frame, and terminals. The outer circumference of a yoke constituting the magnetic circuit has a plurality of slits, while the first cylinder and the second cylinder are connected together by a plurality of radially-disposed joints. The loudspeaker has a flat profile yet is compatible with large amplitude and high output power, and capable of reproducing a wide range of sounds from a low tone to a high tone.Type: GrantFiled: September 4, 2001Date of Patent: January 11, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Satoshi Koura, Takashi Suzuki, Hiroyuki Takewa, Mitsukazu Kuze, Mitsuhiro Hasegawa
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Patent number: 6836551Abstract: A loudspeaker includes: a bottom plate; a center pole provided upwardly from the bottom plate; a yoke surrounding the center pole and having a plurality of slits; a magnet for providing a magnetic flux for the center pole and the yoke; a coil provided between the center pole and the yoke; a first annular member for supporting the coil; a plurality of support members for supporting the first annular member, the plurality of support members being inserted into the plurality of slits; and a diaphragm supported by the plurality of support members, wherein upper faces of the plurality of support members gradually decrease in height in a direction away from the first annular member, and wherein a lower face of the coil is located below a position at which the diaphragm is supported by the plurality of support members.Type: GrantFiled: March 23, 2001Date of Patent: December 28, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitsukazu Kuze, Shuji Saiki, Hiroyuki Takewa, Satoshi Koura
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Patent number: 6757404Abstract: A diaphragm is gained by the co-molded of a dome part, a voice coil junction part, a cone part and a peripheral part through the injection mold of thermoplastic resin. The thickness of the central part of the dome is made great so that the resonance amplitude in this part becomes small. In addition, an annular rib is integrally provided to the voice coil junction part so as to increase the junction strength between the diaphragm and the voice coil bobbin. Thus, the electromagnetic driving force of the voice coil can be effectively transmitted to the diaphragm so that a loud speaker with excellent characteristics can be gained.Type: GrantFiled: November 19, 2001Date of Patent: June 29, 2004Assignee: Matsushita Electric industrial Co., Ltd.Inventors: Hiroyuki Takewa, Mikio Iwasa, Mitsukazu Kuze, Shinya Tabata, Shinya Mizone, Yoshiyuki Takahashi, Satoshi Koura, Takashi Suzuki, Teruo Doi, Kiyoshi Ikeda, Hiroko Yamazaki
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Patent number: 6747395Abstract: A piezoelectric loudspeaker includes: a piezoelectric vibrator including a diaphragm and a piezoelectric member provided on at least one face of the diaphragm, the diaphragm being vibrated by the piezoelectric member; a frame for supporting the piezoelectric vibrator; and a visco-elastic member provided on at least one face of the piezoelectric vibrator. The visco-elastic member is disposed in a substantial center of the piezoelectric vibrator. The visco-elastic member has a bottom face area which accounts for about 11% to about 80% of a bottom face area of the diaphragm.Type: GrantFiled: November 1, 1999Date of Patent: June 8, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazue Satoh, Hiroyuki Takewa, Mikio Iwasa, Mitsukazu Kuze
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Patent number: 6700987Abstract: A loudspeaker includes: a frame; a vibrating section including a diaphragm having an internal periphery and an external periphery, a voice coil attached to the internal periphery of the diaphragm, a spider which connects the voice coil to the frame, and a dust cap attached to the internal periphery of the diaphragm; and a surround which connects the external periphery of the diaphragm to the frame, wherein the ratio between the weight of the vibrating section and the weight of the surround is 0.9:1 to 1.5:1.Type: GrantFiled: August 21, 2001Date of Patent: March 2, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitsukazu Kuze, Shuji Saiki, Hiroyuki Takewa
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Publication number: 20030231784Abstract: The surrounding structure of the loudspeaker forms an annular structure, including attaching parts and curved part. The cross section of the curved part is in a hollow and approximately elliptical form. The height along the major axis of the ellipse is made parallel to the center axis of the vibrating diaphragm of the loudspeaker while the width along the major axis of the ellipse is set in the direction orthogonal to the center axis of the vibrating diaphragm. In the elliptical surrounding structure having such a structure, the width in the cross section of the surrounding structure of the loudspeaker can be made narrow in comparison with a semi-circular surround, whereby the linearity of the amplitude and the maximum displacement are increased.Type: ApplicationFiled: April 8, 2003Publication date: December 18, 2003Inventors: Mitsukazu Kuze, Hiroyuki Takewa, Mikio Iwasa
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Patent number: 6655495Abstract: A damper 3A is provided with an inner peripheral waveform portion 11 and an outer peripheral waveform portion 12. A flat portion 10 is provided between the inner peripheral waveform portion 11 and the outer peripheral waveform portion 12. When the damper is used for a loudspeaker, the flat portion 10 does not elastically deform in a radial direction R, so that linearity of the damper 3A in a vibrating direction Z is ensured by elastic deformation of the waveform portions. In addition, a rolling phenomenon of a voice coil bobbin and a diaphragm can be suppressed.Type: GrantFiled: October 10, 2002Date of Patent: December 2, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitsukazu Kuze, Hiroyuki Takewa, Kazue Satoh, Mikio Iwasa
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Publication number: 20030079936Abstract: A damper 3A is provided with an inner peripheral waveform portion 11 and an outer peripheral waveform portion 12. A flat portion 10 is provided between the inner peripheral waveform portion 11 and the outer peripheral waveform portion 12. When the damper is used for a loudspeaker, the flat portion 10 does not elastically deform in a radial direction R, so that linearity of the damper 3A in a vibrating direction Z is ensured by elastic deformation of the waveform portions. In addition, a rolling phenomenon of a voice coil bobbin and a diaphragm can be suppressed.Type: ApplicationFiled: October 10, 2002Publication date: May 1, 2003Inventors: Mitsukazu Kuze, Hiroyuki Takewa, Kazue Satoh, Mikio Iwasa
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Publication number: 20030053651Abstract: A loudspeaker comprising a bobbin, a coil wound around an outer surface of the bobbin, a magnetic circuit having a magnetic gap the coil is inserted, a first cylinder fixed to the outer surface of the bobbin, a second cylinder connected with the first cylinder, a diaphragm and a damper coupled to the outer circumferential surface of the second cylinder, an edge coupled to the diaphragm, a frame on which an outer circumference of the damper and an outer circumference of the edge are fixed, and terminals fixed on the frame and electrically connected with the coil. In a speaker of the present invention, the outer circumference of a yoke constituting the magnetic circuit has a plurality of slits, while the first cylinder and the second cylinder are connected together by a plurality of radially-disposed joints. Speakers in the present invention have a flat profile yet they are compatible with large amplitude and high output power, capable of reproducing a wide range of sounds from a low tone to a high tone.Type: ApplicationFiled: August 20, 2002Publication date: March 20, 2003Inventors: Satoshi Koura, Takashi Suzuki, Hiroyuki Takewa, Mitsukazu Kuze, Mitsuhiro Hasegawa
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Publication number: 20020061117Abstract: A diaphragm is gained by the co-molded of a dome part, a voice coil junction part, a cone part and a peripheral part through the injection mold of thermoplastic resin. The thickness of the central part of the dome is made great so that the resonance amplitude in this part becomes small. In addition, an annular rib is integrally provided to the voice coil junction part so as to increase the junction strength between the diaphragm and the voice coil bobbin. Thus, the electromagnetic driving force of the voice coil can be effectively transmitted to the diaphragm so that a loud speaker with excellent characteristics can be gained.Type: ApplicationFiled: November 19, 2001Publication date: May 23, 2002Inventors: Hiroyuki Takewa, Mikio Iwasa, Mitsukazu Kuze, Shinya Tabata, Shinya Mizone, Yoshiyuki Takahashi, Satoshi Koura, Takashi Suzuki, Teruo Doi, Kiyoshi Ikeda, Hiroko Yamazaki
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Publication number: 20020051558Abstract: A loudspeaker includes: a frame; a vibrating section including a diaphragm having an internal periphery and an external periphery, a voice coil attached to the internal periphery of the diaphragm, a spider which connects the voice coil to the frame, and a dust cap attached to the internal periphery of the diaphragm; and a surround which connects the external periphery of the diaphragm to the frame, wherein the ratio between the weight of the vibrating section and the weight of the surround is 0.9:1 to 1.5:1.Type: ApplicationFiled: August 21, 2001Publication date: May 2, 2002Inventors: Mitsukazu Kuze, Shuji Saiki, Hiroyuki Takewa