Patents by Inventor Akihiko Furuto
Akihiko Furuto 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: 8135160Abstract: A speaker device includes: a magnetic circuit which includes two magnetic gaps; a diaphragm which is arranged at a position passing through at least the two magnetic gaps and includes a recessed part extending in a direction substantially orthogonal with respect to an extending direction of a magnetic flux in the magnetic gaps; and a voice coil, formed into an annular shape, which includes a first parallel part extending in one direction and a second parallel part extending in a direction in parallel with the first parallel part and opposite to the first parallel part with a constant space. Particularly, the first parallel part and the second parallel part are arranged in a direction in parallel with an extending direction of the recessed part, respectively, and the first parallel part and the second parallel part are arranged in the recessed part to be positioned in the two magnetic gaps, respectively.Type: GrantFiled: December 21, 2006Date of Patent: March 13, 2012Assignees: Pioneer Corporation, Tokoku Pioneer CorporationInventors: Kunio Mitobe, Akihiko Furuto
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Patent number: 8041071Abstract: A diaphragm and a speaker unit which can prevent generation of abnormal sound by suppressing rolling phenomenon. The speaker unit has a diaphragm. The diaphragm includes a portion for supporting a voice coil, and a sound emitting portion formed continuously to one end thereof. The voice coil supporting portion has a shape extending reversely to the sound emitting direction. The sound emitting portion includes a step portion having a surface substantially perpendicular to the sound emitting direction, and a bent portion having a cross-section bent toward the inside of the voice coil supporting portion from one end of the step portion.Type: GrantFiled: December 27, 2006Date of Patent: October 18, 2011Assignees: Pioneer Corporation, Tohoku Pioneer CorporationInventors: Akihiko Furuto, Sinsuke Konuma
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Patent number: 8027503Abstract: A diaphragm of a speaker device, formed into an elongated configuration, has a recessed shape and includes a voice coil arrangement part extending in its longitude direction. The voice coil arrangement part has a gap with a constant width in its lateral direction and includes a voice coil supporting part for supporting a voice coil and an expanded part provided at a position along it.Type: GrantFiled: December 19, 2006Date of Patent: September 27, 2011Assignees: Pioneer Corporation, Tohoku Pioneer CorporationInventors: Shinsuke Konuma, Akihiko Furuto, Kunio Mitobe
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Publication number: 20110116662Abstract: A speaker device includes a vibrating body including a diaphragm and a voice coil supported by a part of the diaphragm and a magnetic circuit including a first magnetic pole part having a magnet and a second magnetic pole part different from the first magnetic pole part and arranged spaced apart from the first magnetic pole part. The voice coil is arranged between the first magnetic pole part and the second magnetic pole part, the vibrating body includes a conducting part formed at a part or whole of the diaphragm, in the proximity of the voice coil, and the conducting part is arranged between the first magnetic pole part and the second magnetic pole part.Type: ApplicationFiled: July 10, 2008Publication date: May 19, 2011Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Kazuki Yuze, Hiroyuki Kobayashi, Koji Takayama, Akihiko Furuto, Shintaro Niidera, Toshihiro Hikichi
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Publication number: 20100208934Abstract: Objects are to make a speaker device smaller than heretofore in size, in profile, and in weight, and to reproduce sound in high quality. The speaker device includes: a diaphragm which has an inner rim connected to a voice coil bobbin and an outer rim connected to a frame through an edge, and is shaped so that a peak portion is formed between the inner rim and the outer rim, which are positioned at an acoustic radiation side in comparison with the peak portion; and an inner magnet type magnetic circuit for driving a voice coil which is arranged on the voice coil bobbin connected to the inner rim of the diaphragm.Type: ApplicationFiled: May 24, 2006Publication date: August 19, 2010Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Hiroyuki Dohi, Akihiko Furuto
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Publication number: 20100177925Abstract: A speaker device includes a diaphragm having an inner rim connected to a voice coil bobbin and an outer rim connected to a frame through an edge, wherein the diaphragm is shaped so that a peak portion is formed with an acute angle folded back between the inner rim and the outer rim which are positioned at an acoustic radiation side in comparison with the peak portion. The cross-sectional shape of the diaphragm extending from the peak portion to the inner rim is formed with a convex shape toward an acoustic radiation side, and also that of the diaphragm extending from the peak portion to the outer rim is formed with substantially straight shape or convex shape toward the acoustic radiation side. The speaker device lower in profile allows high-quality sound to be reproduced, in particular, the high range of frequency characteristic of the sound pressure to be improved.Type: ApplicationFiled: May 24, 2006Publication date: July 15, 2010Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Akihiko Furuto, Hiroyuki Dohi
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Publication number: 20100135520Abstract: A diaphragm and a speaker unit which can prevent generation of abnormal sound by suppressing rolling phenomenon. The speaker unit has a diaphragm. The diaphragm includes a portion for supporting a voice coil, and a sound emitting portion formed continuously to one end thereof. The voice coil supporting portion has a shape extending reversely to the sound emitting direction. The sound emitting portion includes a step portion having a surface substantially perpendicular to the sound emitting direction, and a bent portion having a cross-section bent toward the inside of the voice coil supporting portion from one end of the step portion.Type: ApplicationFiled: December 27, 2006Publication date: June 3, 2010Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Akihiko Furuto, Sinsuke Konuma
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Publication number: 20070147651Abstract: A speaker device includes: a magnetic circuit which includes two magnetic gaps; a diaphragm which is arranged at a position passing through at least the two magnetic gaps and includes a recessed part extending in a direction substantially orthogonal with respect to an extending direction of a magnetic flux in the magnetic gaps; and a voice coil, formed into an annular shape, which includes a first parallel part extending in one direction and a second parallel part extending in a direction in parallel with the first parallel part and opposite to the first parallel part with a constant space. Particularly, the first parallel part and the second parallel part are arranged in a direction in parallel with an extending direction of the recessed part, respectively, and the first parallel part and the second parallel part are arranged in the recessed part to be positioned in the two magnetic gaps, respectively.Type: ApplicationFiled: December 21, 2006Publication date: June 28, 2007Applicants: PIONEER CORPORATION, TOKOKU PIONEER CORPORATIONInventors: Kunio Mitobe, Akihiko Furuto
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Publication number: 20070140520Abstract: A diaphragm of a speaker device, formed into an elongated configuration, has a recessed shape and includes a voice coil arrangement part extending in its longitude direction. The voice coil arrangement part has a gap with a constant width in its lateral direction and includes a voice coil supporting part for supporting a voice coil and an expanded part provided at a position along it.Type: ApplicationFiled: December 19, 2006Publication date: June 21, 2007Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATIONInventors: Shinsuke Konuma, Akihiko Furuto, Kunio Mitobe