JPS54134618A - Voice coil bobbin - Google Patents

Voice coil bobbin

Info

Publication number
JPS54134618A
JPS54134618A JP4210878A JP4210878A JPS54134618A JP S54134618 A JPS54134618 A JP S54134618A JP 4210878 A JP4210878 A JP 4210878A JP 4210878 A JP4210878 A JP 4210878A JP S54134618 A JPS54134618 A JP S54134618A
Authority
JP
Japan
Prior art keywords
bobbin
voice coil
open cells
coil bobbin
form metal
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP4210878A
Other languages
Japanese (ja)
Inventor
Tamotsu Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4210878A priority Critical patent/JPS54134618A/en
Publication of JPS54134618A publication Critical patent/JPS54134618A/en
Pending legal-status Critical Current

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
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction

Landscapes

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

Abstract

PURPOSE:To eliminate the need for opening of the bobbin by constituting the tubular bobbin with sponge form metal having open cells. CONSTITUTION:A bobbin 6 made in cylindrical form is made of sponge form metal having open cells and a voice coil 2 is wound on the outside circumference thereof. The air chamber 10 constituted by the center pole 3 of magnetic circuit, dome form diaphragm 4 and bobbin 6 does not cause cavity resonance because the bobbin 6 has air permeability owing to its open cells.
JP4210878A 1978-04-12 1978-04-12 Voice coil bobbin Pending JPS54134618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4210878A JPS54134618A (en) 1978-04-12 1978-04-12 Voice coil bobbin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4210878A JPS54134618A (en) 1978-04-12 1978-04-12 Voice coil bobbin

Publications (1)

Publication Number Publication Date
JPS54134618A true JPS54134618A (en) 1979-10-19

Family

ID=12626756

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4210878A Pending JPS54134618A (en) 1978-04-12 1978-04-12 Voice coil bobbin

Country Status (1)

Country Link
JP (1) JPS54134618A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2141939A1 (en) * 2008-07-02 2010-01-06 Renault SAS Mandrel for a coil transducer motor structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2141939A1 (en) * 2008-07-02 2010-01-06 Renault SAS Mandrel for a coil transducer motor structure
WO2010000481A1 (en) * 2008-07-02 2010-01-07 Renault S.A.S. Voice coil support for a coil transducer motor structure
AU2009266026B2 (en) * 2008-07-02 2014-05-29 Renault S.A.S. Voice coil support for a coil transducer motor structure
US8971564B2 (en) 2008-07-02 2015-03-03 Renault S.A.S. Voice coil support for a coil transducer motor structure

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