JPS5610797A - Electromechanical converter on magnetic fluid system - Google Patents

Electromechanical converter on magnetic fluid system

Info

Publication number
JPS5610797A
JPS5610797A JP8619979A JP8619979A JPS5610797A JP S5610797 A JPS5610797 A JP S5610797A JP 8619979 A JP8619979 A JP 8619979A JP 8619979 A JP8619979 A JP 8619979A JP S5610797 A JPS5610797 A JP S5610797A
Authority
JP
Japan
Prior art keywords
magnetic fluid
center
cooling
gap
passage
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
JP8619979A
Other languages
Japanese (ja)
Inventor
Mitsuaki Ooshima
Kenichi Takahashi
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 JP8619979A priority Critical patent/JPS5610797A/en
Publication of JPS5610797A publication Critical patent/JPS5610797A/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
    • H04R9/022—Cooling arrangements

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 improve the input-resisting property of a dynamic electromechanical converter by improving the effect of cooling in comparison with that only by thermal conduction of a fixed magnetic fluid, by cooling a movable-part driving coil by making use of the convection and thermal conduction of the magnetic fluid. CONSTITUTION:To plate 5 arranged on the outer circumferential part of substrate 2, loudspeaker diaphragm 6 is fitted with support member 7 interposed. Into gap part 8 between the outer circumference of tip part 3a of center pole 3 and the inside of plate 5, bobbin 9 is elongated from diaphragm 6 and around it, voice coil 10 is wound. The tip part of this pole 3 is axially branched into tip part 3a and base part 3b and between the branched tip part 3a and base part 3b, magnetic fluid suction member 11 with branch parts elongated radially from the center part is interposed to form ring-shaped passage 12 whose axial ends are both open to the center cylinder part of member 11. Further, passage 12, suction passage 13 communicating with the center part of gap part 8, and discharge passages 14a and 14b communicating with the end part of gap part 8 are formed to improve the cooling effect of coil 10.
JP8619979A 1979-07-06 1979-07-06 Electromechanical converter on magnetic fluid system Pending JPS5610797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8619979A JPS5610797A (en) 1979-07-06 1979-07-06 Electromechanical converter on magnetic fluid system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8619979A JPS5610797A (en) 1979-07-06 1979-07-06 Electromechanical converter on magnetic fluid system

Publications (1)

Publication Number Publication Date
JPS5610797A true JPS5610797A (en) 1981-02-03

Family

ID=13880104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8619979A Pending JPS5610797A (en) 1979-07-06 1979-07-06 Electromechanical converter on magnetic fluid system

Country Status (1)

Country Link
JP (1) JPS5610797A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57210690A (en) * 1981-06-19 1982-12-24 Suwa Seikosha Kk Electrode circuit board
JP2008038440A (en) * 2006-08-04 2008-02-21 Tsuchiya Tsco Co Ltd Spacer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57210690A (en) * 1981-06-19 1982-12-24 Suwa Seikosha Kk Electrode circuit board
JPH0250634B2 (en) * 1981-06-19 1990-11-02 Seiko Epson Corp
JP2008038440A (en) * 2006-08-04 2008-02-21 Tsuchiya Tsco Co Ltd Spacer

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