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WO2000067523A3 - Moving coil driver - Google Patents

Moving coil driver Download PDF

Info

Publication number
WO2000067523A3
WO2000067523A3 PCT/GB2000/001484 GB0001484W WO0067523A3 WO 2000067523 A3 WO2000067523 A3 WO 2000067523A3 GB 0001484 W GB0001484 W GB 0001484W WO 0067523 A3 WO0067523 A3 WO 0067523A3
Authority
WO
WIPO (PCT)
Prior art keywords
coils
moving coil
coil driver
pair
former
Prior art date
Application number
PCT/GB2000/001484
Other languages
French (fr)
Other versions
WO2000067523A2 (en
Inventor
Graham Bank
Martin Roberts
Original Assignee
New Transducers Ltd
Graham Bank
Martin Roberts
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9910217.0A external-priority patent/GB9910217D0/en
Priority claimed from GBGB9916837.9A external-priority patent/GB9916837D0/en
Application filed by New Transducers Ltd, Graham Bank, Martin Roberts filed Critical New Transducers Ltd
Priority to AU44190/00A priority Critical patent/AU4419000A/en
Priority to EP00925465A priority patent/EP1174002A2/en
Priority to JP2000614774A priority patent/JP2002543726A/en
Publication of WO2000067523A2 publication Critical patent/WO2000067523A2/en
Publication of WO2000067523A3 publication Critical patent/WO2000067523A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/041—Voice coil arrangements comprising more than one voice coil unit on the same bobbin

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

A moving coil loudspeaker driver has at least one pair of coils (18, 20) on a former (16). The coils move between pole pieces (28, 30) of a permanent magnet system (28, 30, 32, 34). The pair(s) of coils (18, 20) are oppositely wound and closely spaced to reduce the combined inductance of the coils.
PCT/GB2000/001484 1999-04-29 2000-04-28 Moving coil driver WO2000067523A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU44190/00A AU4419000A (en) 1999-04-29 2000-04-28 Moving coil driver
EP00925465A EP1174002A2 (en) 1999-04-29 2000-04-28 Moving coil driver
JP2000614774A JP2002543726A (en) 1999-04-29 2000-04-28 Moving coil drive

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9910217.0A GB9910217D0 (en) 1999-04-29 1999-04-29 Moving coil driver
GB9910217.0 1999-04-29
GBGB9916837.9A GB9916837D0 (en) 1999-07-20 1999-07-20 Moving coil driver
GB9916837.9 1999-07-20

Publications (2)

Publication Number Publication Date
WO2000067523A2 WO2000067523A2 (en) 2000-11-09
WO2000067523A3 true WO2000067523A3 (en) 2001-02-08

Family

ID=26315502

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/001484 WO2000067523A2 (en) 1999-04-29 2000-04-28 Moving coil driver

Country Status (6)

Country Link
EP (1) EP1174002A2 (en)
JP (1) JP2002543726A (en)
CN (1) CN1347628A (en)
AU (1) AU4419000A (en)
TW (1) TW478287B (en)
WO (1) WO2000067523A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8284982B2 (en) 2006-03-06 2012-10-09 Induction Speaker Technology, Llc Positionally sequenced loudspeaker system

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1227701B1 (en) * 2000-08-24 2008-10-22 Matsushita Electric Industrial Co., Ltd. Speaker and magnetic circuit used for the speaker
AU2008310201A1 (en) 2007-10-13 2009-04-16 Shenzhen New Electric Science And Technology Co., Ltd Multimedia acoustics system having audio frequency digital interface
CA2759458A1 (en) * 2008-02-21 2009-08-27 Shenzhen New Electric Science And Technology Co., Ltd Inner magnetic transducer with multiple magnetic gaps and multiple coils and preparation method thereof
CN102892063B (en) * 2011-07-21 2018-05-01 张凡 Multiple driver transducer with symmetrical magnetic circuits and symmetric coil circuit
JP6224324B2 (en) 2012-07-06 2017-11-01 ハーマン ベッカー ゲープコチレンジャー ジーアルト コールライトルト フェレルーシェグ タイヤーシャーシャイグ Acoustic transducer assembly
JP2015522230A (en) * 2012-07-20 2015-08-03 ファン チャン Multi-drive transducer with symmetrically arranged magnetic and coil circuits
CN104301847B (en) * 2014-11-03 2017-11-28 常州阿木奇声学科技有限公司 A kind of dynamic iron unit magnetic driving mechanism for reducing low-frequency distortion
NL2017514B1 (en) * 2016-09-22 2018-03-29 Univ Delft Tech Loudspeaker unit with multiple drive units
WO2019197001A1 (en) * 2018-04-11 2019-10-17 Dali A/S Double voice coil loudspeaker transducer unit
US11466698B2 (en) * 2018-07-30 2022-10-11 Danfoss A/S Electromechanical actuators for refrigerant flow control
US11341948B2 (en) 2019-07-17 2022-05-24 Sound Solutions International Co., Ltd. Electromagnetic actuator with improved spring arrangement
CN113727258B (en) 2020-05-20 2024-01-26 奥音科技（镇江）有限公司 Electrodynamic exciter, speaker, electrodynamic transducer and output device
US11678123B2 (en) 2020-05-20 2023-06-13 Sound Solutions International Co., Ltd. Electromagnetic actuator for a speaker or a sound transducer with a high-strength metal connection between the voice coil and the magnet system
EP4468740A1 (en) * 2023-05-24 2024-11-27 Juluen Enterprise Co., Ltd. Double gap double coil driven speaker

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59192000A (en) * 1983-04-15 1984-10-31 Hitachi Ltd speaker device
US4783824A (en) * 1984-10-23 1988-11-08 Trio Kabushiki Kaisha Speaker unit having two voice coils wound around a common coil bobbin
EP0492142A2 (en) * 1990-12-24 1992-07-01 Nokia (Deutschland) GmbH Driver system for an extended-travel bass loudspeaker
JPH08223688A (en) * 1995-02-17 1996-08-30 Alpine Electron Inc Speaker
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
DE19729082A1 (en) * 1997-07-08 1999-01-14 Nokia Deutschland Gmbh Screened magnetic system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59192000A (en) * 1983-04-15 1984-10-31 Hitachi Ltd speaker device
US4783824A (en) * 1984-10-23 1988-11-08 Trio Kabushiki Kaisha Speaker unit having two voice coils wound around a common coil bobbin
EP0492142A2 (en) * 1990-12-24 1992-07-01 Nokia (Deutschland) GmbH Driver system for an extended-travel bass loudspeaker
JPH08223688A (en) * 1995-02-17 1996-08-30 Alpine Electron Inc Speaker
US5909499A (en) * 1995-02-17 1999-06-01 Alpine Electronics, Inc. Speaker with magnetic structure for damping coil displacement
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
DE19729082A1 (en) * 1997-07-08 1999-01-14 Nokia Deutschland Gmbh Screened magnetic system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 053 (E - 301) 7 March 1985 (1985-03-07) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 12 26 December 1996 (1996-12-26) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8284982B2 (en) 2006-03-06 2012-10-09 Induction Speaker Technology, Llc Positionally sequenced loudspeaker system

Also Published As

Publication number Publication date
TW478287B (en) 2002-03-01
AU4419000A (en) 2000-11-17
WO2000067523A2 (en) 2000-11-09
EP1174002A2 (en) 2002-01-23
JP2002543726A (en) 2002-12-17
CN1347628A (en) 2002-05-01

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