JPS553241A - Diaphragm of speaker - Google Patents

Diaphragm of speaker

Info

Publication number
JPS553241A
JPS553241A JP7565278A JP7565278A JPS553241A JP S553241 A JPS553241 A JP S553241A JP 7565278 A JP7565278 A JP 7565278A JP 7565278 A JP7565278 A JP 7565278A JP S553241 A JPS553241 A JP S553241A
Authority
JP
Japan
Prior art keywords
carbon fiber
carbon
base material
diaphragm
filament
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
JP7565278A
Other languages
Japanese (ja)
Inventor
Takeshi Isogai
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.)
Toa Corp
Toa Tokushu Denki KK
Original Assignee
Toa Electric Co Ltd
Toa Tokushu Denki KK
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 Toa Electric Co Ltd, Toa Tokushu Denki KK filed Critical Toa Electric Co Ltd
Priority to JP7565278A priority Critical patent/JPS553241A/en
Publication of JPS553241A publication Critical patent/JPS553241A/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

Landscapes

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

Abstract

PURPOSE:To form the carbon matrix diaphragm with omission of the repetitive working for the impregnation and burning in the manufacture processes by depositing the heat decomposed carbon on the carbon fiber filament of the base material and thus filling up the filament gap with the heat decomposed carbon. CONSTITUTION:The resin such as the acryl phenol polyimide rayon, PVA, vinyl chloride and the like is burnt and carbonaed in the inactive atmosphere and at about 450-1650 deg.C to obtain the carbon fiber. This carbon fiber is molded into the shape of the desired speaker diaphragm to obtain the base material, and this base material is heated up to about 1000 deg.C or higher in the organic gas such as the methane gas or the like. Then the heat decomposed carbon liberated from the organic gas is deposited on the carbon fiber filament to be used as the base material to fill up the gaps between the carbon fiber filaments. In this method, no contraction is caused in the burning process, and the accuracy control can be facilitated for the trim size. As a result, the maufacture can be facilitated for the matrix diaphragm.
JP7565278A 1978-06-21 1978-06-21 Diaphragm of speaker Pending JPS553241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7565278A JPS553241A (en) 1978-06-21 1978-06-21 Diaphragm of speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7565278A JPS553241A (en) 1978-06-21 1978-06-21 Diaphragm of speaker

Publications (1)

Publication Number Publication Date
JPS553241A true JPS553241A (en) 1980-01-11

Family

ID=13582384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7565278A Pending JPS553241A (en) 1978-06-21 1978-06-21 Diaphragm of speaker

Country Status (1)

Country Link
JP (1) JPS553241A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183311U (en) * 1985-05-08 1986-11-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61183311U (en) * 1985-05-08 1986-11-15

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