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JPS5754498A - Speaker - Google Patents

Speaker

Info

Publication number
JPS5754498A
JPS5754498A JP12934380A JP12934380A JPS5754498A JP S5754498 A JPS5754498 A JP S5754498A JP 12934380 A JP12934380 A JP 12934380A JP 12934380 A JP12934380 A JP 12934380A JP S5754498 A JPS5754498 A JP S5754498A
Authority
JP
Japan
Prior art keywords
diaphragm
aluminum
foamed
fitted
losing
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
JP12934380A
Other languages
Japanese (ja)
Inventor
Norihiko Takami
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 JP12934380A priority Critical patent/JPS5754498A/en
Publication of JPS5754498A publication Critical patent/JPS5754498A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To increase the conversion characteristics and to prevent the production of asymmetrical oscillation without losing rigidity against bending, by forming the vibration diaphragm core with foamed member of light metal such as aluminum and giving nonuniform thickness distribution by taking symmetrical as axial center. CONSTITUTION:The skins of aluminum foil 15, 16 are adhered on upper and lower both surfaces of a core 14 consisting of foamed aluminum or foamed synthetic resin of a vibration diaphragm 15. The circular diaphragm 15 is made symmetrical to the center axis and ununiform thickness, and a ring shape most thick part 17 having maximum thickness is formed. An edge 18 fitted to the frame 11 is fitted to this diaphragm 15, and a transfer cone 18, a magnetic dircuit 12 and the edge 18 are provided. The production of asymmetrical oscillation is prevented without losing the rigidity against bending, allowing to increase the electro-acoustic characteristics.
JP12934380A 1980-09-19 1980-09-19 Speaker Pending JPS5754498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12934380A JPS5754498A (en) 1980-09-19 1980-09-19 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12934380A JPS5754498A (en) 1980-09-19 1980-09-19 Speaker

Publications (1)

Publication Number Publication Date
JPS5754498A true JPS5754498A (en) 1982-03-31

Family

ID=15007259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12934380A Pending JPS5754498A (en) 1980-09-19 1980-09-19 Speaker

Country Status (1)

Country Link
JP (1) JPS5754498A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045587U (en) * 1983-09-06 1985-03-30 三洋電機株式会社 flat speaker
JPS6057294U (en) * 1983-09-27 1985-04-22 三洋電機株式会社 flat speaker
US6305491B2 (en) 1998-05-08 2001-10-23 Matsushita Electric Industrial Co., Ltd. Speaker
US7568552B2 (en) * 2004-01-15 2009-08-04 Bose Corporation Acoustic passive radiator rocking mode reducing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6045587U (en) * 1983-09-06 1985-03-30 三洋電機株式会社 flat speaker
JPS6057294U (en) * 1983-09-27 1985-04-22 三洋電機株式会社 flat speaker
US6305491B2 (en) 1998-05-08 2001-10-23 Matsushita Electric Industrial Co., Ltd. Speaker
US7568552B2 (en) * 2004-01-15 2009-08-04 Bose Corporation Acoustic passive radiator rocking mode reducing

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