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1. WO2009013851 - SPEAKER AND ELECTRONIC APPARATUS EMPLOYING THE SAME

Publication Number WO/2009/013851
Publication Date 29.01.2009
International Application No. PCT/JP2008/001432
International Filing Date 05.06.2008
IPC
H04R 9/02 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
9Transducers of moving-coil, moving-strip, or moving-wire type
02Details
H04R 1/02 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
1Details of transducers
02Casings; Cabinets; Mountings therein
CPC
H04R 2499/11
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
2499Aspects covered by H04R or H04S not otherwise provided for in their subgroups
10General applications
11Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
H04R 31/006
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
31Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
006Interconnection of transducer parts
H04R 9/027
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
9Transducers of moving-coil, moving-strip, or moving-wire type
02Details
025Magnetic circuit
027Air gaps using a magnetic fluid
H04R 9/046
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
9Transducers of moving-coil, moving-strip, or moving-wire type
02Details
04Construction, mounting, or centering of coil
046Construction
Applicants
  • パナソニック株式会社 PANASONIC CORPORATION [JP]/[JP] (AllExceptUS)
  • 下川床剛 SHIMOKAWATOKO, Takeshi (UsOnly)
  • 佐野浩司 SANO, Koji (UsOnly)
  • 本田一樹 HONDA, Kazuki (UsOnly)
  • 久世光一 KUZE, Mitsukazu (UsOnly)
  • 溝根信也 MIZONE, Shinya (UsOnly)
Inventors
  • 下川床剛 SHIMOKAWATOKO, Takeshi
  • 佐野浩司 SANO, Koji
  • 本田一樹 HONDA, Kazuki
  • 久世光一 KUZE, Mitsukazu
  • 溝根信也 MIZONE, Shinya
Agents
  • 岩橋文雄 IWAHASHI, Fumio
Priority Data
2007-19280925.07.2007JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) SPEAKER AND ELECTRONIC APPARATUS EMPLOYING THE SAME
(FR) SPEAKER ET APPAREIL ÉLECTRONIQUE L'EMPLOYANT
(JA) スピーカとそれを用いた電子機器
Abstract
(EN)
A speaker comprises a diaphragm, a voice coil secured to the diaphragm, a first magnet having a first magnetic pole face facing the voice coil, a second magnet arranged inside the voice coil, and a magnetic fluid provided between the first magnet and the voice coil. The first magnet has a first magnetic pole face facing the voice coil toward the inside thereof. The second magnet has a second magnetic pole face arranged inside the voice coil such that the flux passing the first magnetic pole face of the first magnet intersects the voice coil in the direction perpendicular to the voice coil and the vibrating direction. The magnetic fluid isin contact with the first magnetic pole face and the voice coil. This speaker is thin but produces a large voice output while preventing rolling phenomenon.
(FR)
Un haut-parleur se compose d'un diaphragme, d'une antenne vocale fixée au diaphragme, d'un premier aimant à premier pôle magnétique faisant face à l'antenne vocale, d'un second aimant placé à l'intérieur de l'antenne et d'un liquide magnétique placé entre le premier aimant et l'antenne vocale. Le premier aimant comporte une première face de pôle magnétique faisant face à l'antenne vocale vers l'intérieur. Le second aimant comporte une seconde face de pôle magnétique placée à l'intérieur de l'antenne vocale de manière à ce que le flux qui traverse la première face de pôle magnétique du premier aimant fasse intersection avec l'antenne vocale dans le sens perpendiculaire à l'antenne vocale et au sens vibratoire. Le liquide magnétique est en contact avec la première face de pôle magnétique et avec l'antenne vocale. Ce haut-parleur est mince mais produit un grand volume vocal tout en empêchant le phénomène de roulage.
(JA)
 スピーカは、振動板と、振動板に固定されているボイスコイルと、ボイスコイルに対向する第1の磁極面を有する第1の磁石と、ボイスコイルの内側に配置された第2の磁石と、第1の磁石とボイスコイルとの間に設けられた磁性流体とを備える。第1の磁石は、ボイスコイルの内側に向かってボイスコイルに対向する第1の磁極面を有する。第2の磁石は、第1の磁石の第1の磁極面を通る磁束がボイスコイルと振動方向とに対して直角の方向でボイスコイルに交差するように、ボイスコイルの内側に配置された第2の磁極面を有する。磁性流体は第1の磁極面とボイスコイルとに当接する。このスピーカは薄く、大きな音声出力が得られ、かつローリング現象を防止することができる。
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