JPS55124397A - Speaker diaphragm - Google Patents

Speaker diaphragm

Info

Publication number
JPS55124397A
JPS55124397A JP3269379A JP3269379A JPS55124397A JP S55124397 A JPS55124397 A JP S55124397A JP 3269379 A JP3269379 A JP 3269379A JP 3269379 A JP3269379 A JP 3269379A JP S55124397 A JPS55124397 A JP S55124397A
Authority
JP
Japan
Prior art keywords
synthetic pulp
fiber
featuring
elasticity
density polyethylene
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
JP3269379A
Other languages
Japanese (ja)
Other versions
JPS5822916B2 (en
Inventor
Hirotoshi Niiguchi
Mitsuru Yashiro
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 JP54032693A priority Critical patent/JPS5822916B2/en
Priority to DE2941644A priority patent/DE2941644C2/en
Priority to GB7935835A priority patent/GB2037122B/en
Priority to US06/085,204 priority patent/US4291781A/en
Publication of JPS55124397A publication Critical patent/JPS55124397A/en
Publication of JPS5822916B2 publication Critical patent/JPS5822916B2/en
Expired 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

Landscapes

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

Abstract

PURPOSE:To obtain the diaphragm featuring the larger elasticity and internal loss than the paper with no effect of humidity received, by securing mixture of the high- density polyethylene featuring the specific viscosity and in the specific ratio. CONSTITUTION:The high-density polyethylene fiber featuring the melt index of 2g/10min or less is beaten by the disk refiner or the like to produce the synthetic pulp. And the high-elasticity fiber such as the carbon fiber, the glass fiber and the like in which the synthetic pulp occupies the rate of 70wt% or more, is used for composition. The composite sheet is produced by mixing the synthetic pulp, the carbon fiber and others together, and then molded into the cone shape through the heat pressing or the like. Thus the synthetic pulp is fused. As a result, the speaker diaphragm can be obtained with the high elasticity and high rigidity.
JP54032693A 1978-10-17 1979-03-20 Diaphragm for speaker Expired JPS5822916B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP54032693A JPS5822916B2 (en) 1979-03-20 1979-03-20 Diaphragm for speaker
DE2941644A DE2941644C2 (en) 1978-10-17 1979-10-15 Loudspeaker cone and process for their manufacture
GB7935835A GB2037122B (en) 1978-10-17 1979-10-16 Speaker diaphragm and method of preparation of the same
US06/085,204 US4291781A (en) 1978-10-17 1979-10-16 Speaker diaphragm and method of preparation of the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54032693A JPS5822916B2 (en) 1979-03-20 1979-03-20 Diaphragm for speaker

Publications (2)

Publication Number Publication Date
JPS55124397A true JPS55124397A (en) 1980-09-25
JPS5822916B2 JPS5822916B2 (en) 1983-05-12

Family

ID=12365932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54032693A Expired JPS5822916B2 (en) 1978-10-17 1979-03-20 Diaphragm for speaker

Country Status (1)

Country Link
JP (1) JPS5822916B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6025299U (en) * 1983-07-25 1985-02-20 日本フエルト工業株式会社 speaker diaphragm
US7913808B2 (en) 2008-03-27 2011-03-29 Bose Corporation Waterproofing loudspeaker cones
US8172035B2 (en) 2008-03-27 2012-05-08 Bose Corporation Waterproofing loudspeaker cones

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5453523A (en) * 1977-10-05 1979-04-26 Toray Industries Diaphragm for sound apparatus and its preparation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5453523A (en) * 1977-10-05 1979-04-26 Toray Industries Diaphragm for sound apparatus and its preparation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6025299U (en) * 1983-07-25 1985-02-20 日本フエルト工業株式会社 speaker diaphragm
US7913808B2 (en) 2008-03-27 2011-03-29 Bose Corporation Waterproofing loudspeaker cones
US8172035B2 (en) 2008-03-27 2012-05-08 Bose Corporation Waterproofing loudspeaker cones

Also Published As

Publication number Publication date
JPS5822916B2 (en) 1983-05-12

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