JPS5686600A - Diaphragm plate for speaker - Google Patents

Diaphragm plate for speaker

Info

Publication number
JPS5686600A
JPS5686600A JP16440179A JP16440179A JPS5686600A JP S5686600 A JPS5686600 A JP S5686600A JP 16440179 A JP16440179 A JP 16440179A JP 16440179 A JP16440179 A JP 16440179A JP S5686600 A JPS5686600 A JP S5686600A
Authority
JP
Japan
Prior art keywords
diaphragm plate
sheet
rigidity
foam
heating
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
JP16440179A
Other languages
Japanese (ja)
Inventor
Kazuro Okuzawa
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 JP16440179A priority Critical patent/JPS5686600A/en
Publication of JPS5686600A publication Critical patent/JPS5686600A/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
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Landscapes

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

Abstract

PURPOSE:To obtain a diaphragm plate excellent in rigidity, by providing a carbonized foam obtd. by sintering and a carbonizing foamed resin under nonoxygen atmosphere as an inner layer, and bonding a skin member on the surface. CONSTITUTION:Phenol foam sheet is obtained by giving phenol resin powder in a heated metallic mold and heating it. A sheet of carbonized foam 1 is obtained by heating a foamed sheet under nitrogen gas. Diaphragm plate is formed by taking the sheet as the inner layer and bonding skin members 2, 3 excellent in the rigidity such as aluminum on the upper and lower surfaces. This diaphragm plate is excellent in the heat resistance and solvent resistance.
JP16440179A 1979-12-17 1979-12-17 Diaphragm plate for speaker Pending JPS5686600A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16440179A JPS5686600A (en) 1979-12-17 1979-12-17 Diaphragm plate for speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16440179A JPS5686600A (en) 1979-12-17 1979-12-17 Diaphragm plate for speaker

Publications (1)

Publication Number Publication Date
JPS5686600A true JPS5686600A (en) 1981-07-14

Family

ID=15792421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16440179A Pending JPS5686600A (en) 1979-12-17 1979-12-17 Diaphragm plate for speaker

Country Status (1)

Country Link
JP (1) JPS5686600A (en)

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