JPS5566195A - Speaker diaphragm - Google Patents

Speaker diaphragm

Info

Publication number
JPS5566195A
JPS5566195A JP14026878A JP14026878A JPS5566195A JP S5566195 A JPS5566195 A JP S5566195A JP 14026878 A JP14026878 A JP 14026878A JP 14026878 A JP14026878 A JP 14026878A JP S5566195 A JPS5566195 A JP S5566195A
Authority
JP
Japan
Prior art keywords
group
phenol
fiber
resin
diaphragm
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
JP14026878A
Other languages
Japanese (ja)
Other versions
JPS5839440B2 (en
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 JP14026878A priority Critical patent/JPS5839440B2/en
Publication of JPS5566195A publication Critical patent/JPS5566195A/en
Publication of JPS5839440B2 publication Critical patent/JPS5839440B2/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
    • 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

Abstract

PURPOSE:To obtain a highly elastic and light-weight speaker diaphragm also excellent in the forming properties by giving the thermal forming to the material composed by impregnating the phenol-group resin into the phenol-group fiber and then forming the carbon layer of the Si and B group inorganic polymer on the surface of the carbonized surface. CONSTITUTION:The diaphragm main body is formed by using phenol-group fiber 3 as the basic material and then impregnating phenol-group resin 4 into the basic material. The chemical structure formula is analogous between fiber 3 and resin 4, and thus they are combined firmly through the thermal forming at 200-300 deg.C. The combined fiber 3 and resin 4 are then heated up gradually in the non-oxygen or inactive gas atmosphere to be carbonized at the temperature of 700 deg.C or higher. Then Si and B group inorganic polymer 6 dissolved into the solvent is coatd evenly onto the surface of formed substance 5. After drying, substance 5 is heated up to 600 deg.C or higher to carbonize even polymer 6. Thus SiC carbonized boron layer 7 is formed on the surface substance 5 to be used as the basic material of the diaphragm. Layer 7 features the amorphous state, thus obtaining the diaphragm featuring the excellent physical properties.
JP14026878A 1978-11-13 1978-11-13 Diaphragm for speaker Expired JPS5839440B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14026878A JPS5839440B2 (en) 1978-11-13 1978-11-13 Diaphragm for speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14026878A JPS5839440B2 (en) 1978-11-13 1978-11-13 Diaphragm for speaker

Publications (2)

Publication Number Publication Date
JPS5566195A true JPS5566195A (en) 1980-05-19
JPS5839440B2 JPS5839440B2 (en) 1983-08-30

Family

ID=15264813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14026878A Expired JPS5839440B2 (en) 1978-11-13 1978-11-13 Diaphragm for speaker

Country Status (1)

Country Link
JP (1) JPS5839440B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640843A1 (en) * 1987-05-15 1990-06-22 Mitsubishi Pencil Co DIAPHRAGM FOR ACOUSTICAL APPARATUS
CN1318206C (en) * 2004-08-02 2007-05-30 金大仁 Multilayer plate made of composite material
CN114080823A (en) * 2019-05-28 2022-02-22 伯斯有限公司 Surface treatment for silicone acoustic diaphragms

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219660A (en) * 1983-05-25 1984-12-11 シャープ株式会社 Air conditioner
JPS59219662A (en) * 1983-05-25 1984-12-11 シャープ株式会社 Air conditioner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640843A1 (en) * 1987-05-15 1990-06-22 Mitsubishi Pencil Co DIAPHRAGM FOR ACOUSTICAL APPARATUS
CN1318206C (en) * 2004-08-02 2007-05-30 金大仁 Multilayer plate made of composite material
CN114080823A (en) * 2019-05-28 2022-02-22 伯斯有限公司 Surface treatment for silicone acoustic diaphragms

Also Published As

Publication number Publication date
JPS5839440B2 (en) 1983-08-30

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