JPS5516546A - Dynamic loudspeaker - Google Patents

Dynamic loudspeaker

Info

Publication number
JPS5516546A
JPS5516546A JP8906878A JP8906878A JPS5516546A JP S5516546 A JPS5516546 A JP S5516546A JP 8906878 A JP8906878 A JP 8906878A JP 8906878 A JP8906878 A JP 8906878A JP S5516546 A JPS5516546 A JP S5516546A
Authority
JP
Japan
Prior art keywords
center pole
top surface
yoke
thermal conductivity
center
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.)
Granted
Application number
JP8906878A
Other languages
Japanese (ja)
Other versions
JPS5742280B2 (en
Inventor
Masaharu Ono
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8906878A priority Critical patent/JPS5516546A/en
Publication of JPS5516546A publication Critical patent/JPS5516546A/en
Publication of JPS5742280B2 publication Critical patent/JPS5742280B2/ja
Granted 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
    • H04R9/025—Magnetic circuit
    • H04R9/027—Air gaps using a magnetic fluid

Abstract

PURPOSE:To improve the input resistance of a dynamic loudspeaker provided with a voice coil in a magnetic gap, by radiating heat without suppressing vibrations, by charging a radiation liquid small in viscoity and large in thermal conductivity. CONSTITUTION:At the center of yoke 1, center pole 2 is formed in one and hole 3 penetrating this center pole 2 is provided. Then, ring magnet 4 is fixed on the top surface of yoke 1, plate 5 is fixed on its top surface, and diaphragm 6 with fitted coil bobbin is supported by plate 5. Next, coil bobbin 7 is wound with voice coil 8 and acoustical absorbent 9 is provided on the top surface of center pole 2 covering hole 3. The magnetic gap formed of magnet 4 and center pole is filled with radiation liquid 11 small in viscosity and large in thermal conductivity and sealed at its top part by magnetic fluid 12 containing magnetic ultrafine particles.
JP8906878A 1978-07-20 1978-07-20 Dynamic loudspeaker Granted JPS5516546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8906878A JPS5516546A (en) 1978-07-20 1978-07-20 Dynamic loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8906878A JPS5516546A (en) 1978-07-20 1978-07-20 Dynamic loudspeaker

Publications (2)

Publication Number Publication Date
JPS5516546A true JPS5516546A (en) 1980-02-05
JPS5742280B2 JPS5742280B2 (en) 1982-09-08

Family

ID=13960529

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8906878A Granted JPS5516546A (en) 1978-07-20 1978-07-20 Dynamic loudspeaker

Country Status (1)

Country Link
JP (1) JPS5516546A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5823499U (en) * 1981-08-07 1983-02-14 赤井電機株式会社 speaker device
WO1997025551A2 (en) * 1996-01-05 1997-07-17 William Alexander Courtney Device incorporating elastic fluids and viscous damping
GB2324352A (en) * 1996-01-05 1998-10-21 William Alexander Courtney Device incorporating elastic fluids and viscous damping
US6865281B1 (en) * 2000-09-28 2005-03-08 Jeff B. Jordan Liquid cooled speaker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5823499U (en) * 1981-08-07 1983-02-14 赤井電機株式会社 speaker device
WO1997025551A2 (en) * 1996-01-05 1997-07-17 William Alexander Courtney Device incorporating elastic fluids and viscous damping
WO1997025551A3 (en) * 1996-01-05 1997-08-28 William Alexander Courtney Device incorporating elastic fluids and viscous damping
GB2324352A (en) * 1996-01-05 1998-10-21 William Alexander Courtney Device incorporating elastic fluids and viscous damping
GB2324352B (en) * 1996-01-05 1999-10-20 William Alexander Courtney Device incorporating elastic fluids and viscous damping
US6865281B1 (en) * 2000-09-28 2005-03-08 Jeff B. Jordan Liquid cooled speaker

Also Published As

Publication number Publication date
JPS5742280B2 (en) 1982-09-08

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