JPS5765098A - Vibration diaphragm for acoustic transducer and its manufacture - Google Patents

Vibration diaphragm for acoustic transducer and its manufacture

Info

Publication number
JPS5765098A
JPS5765098A JP14136580A JP14136580A JPS5765098A JP S5765098 A JPS5765098 A JP S5765098A JP 14136580 A JP14136580 A JP 14136580A JP 14136580 A JP14136580 A JP 14136580A JP S5765098 A JPS5765098 A JP S5765098A
Authority
JP
Japan
Prior art keywords
alumina layer
aluminum
vibration diaphragm
anodic oxidation
dome shape
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
JP14136580A
Other languages
Japanese (ja)
Other versions
JPS616596B2 (en
Inventor
Michio Miura
Sunao Horiai
Mamoru Kajimura
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP14136580A priority Critical patent/JPS5765098A/en
Publication of JPS5765098A publication Critical patent/JPS5765098A/en
Publication of JPS616596B2 publication Critical patent/JPS616596B2/ja
Granted 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/027—Diaphragms comprising metallic materials

Landscapes

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

Abstract

PURPOSE:To quicken the rise of sound for speaker and to obtain sound with good separation, by forming crystalline alumina layer on a base made of aluminum or aluminum alloy as a vibration diaphragm. CONSTITUTION:A crystalline alumina layer 2 having 0.5-20mum thickness is coated to a projection side of an aluminum base plate 1 having dome shape projection of 20-100mum thick to form a vibration diaphragm. Two stages of anodic oxidation is preferable to form the alumina layer 2. That is, an aluminum material >=98% high purity is used, and this is formed into dome shape and amorphous alumina layer is at first formed with a conventional alumite film forming method. Thereafter, this is immersed in an electrolyte including 1.5-2.5M/l Na2CO3 at 30-50 deg.C, and anodic oxidation is made with a high current density of 10-50A/dm<2> which causes plasma discharge on the surface. Thus, conventional amorphous alumina layer is changed into crystal alumina layer to achieve excellent alpha and gamma alumina layer.
JP14136580A 1980-10-09 1980-10-09 Vibration diaphragm for acoustic transducer and its manufacture Granted JPS5765098A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14136580A JPS5765098A (en) 1980-10-09 1980-10-09 Vibration diaphragm for acoustic transducer and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14136580A JPS5765098A (en) 1980-10-09 1980-10-09 Vibration diaphragm for acoustic transducer and its manufacture

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP17615280A Division JPS5766505A (en) 1980-12-13 1980-12-13 Cantilever pipe for pickup and its manufacture

Publications (2)

Publication Number Publication Date
JPS5765098A true JPS5765098A (en) 1982-04-20
JPS616596B2 JPS616596B2 (en) 1986-02-27

Family

ID=15290282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14136580A Granted JPS5765098A (en) 1980-10-09 1980-10-09 Vibration diaphragm for acoustic transducer and its manufacture

Country Status (1)

Country Link
JP (1) JPS5765098A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571200A1 (en) * 1984-10-03 1986-04-04 Sony Corp MEMBRANE OF METAL MATERIAL FOR SPEAKER
JP2017028503A (en) * 2015-07-22 2017-02-02 Tsk株式会社 Manufacturing method of loud speaker diaphragm
JP2019039068A (en) * 2017-08-23 2019-03-14 株式会社栗本鐵工所 Film formation method and metallic material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571200A1 (en) * 1984-10-03 1986-04-04 Sony Corp MEMBRANE OF METAL MATERIAL FOR SPEAKER
JP2017028503A (en) * 2015-07-22 2017-02-02 Tsk株式会社 Manufacturing method of loud speaker diaphragm
JP2019039068A (en) * 2017-08-23 2019-03-14 株式会社栗本鐵工所 Film formation method and metallic material

Also Published As

Publication number Publication date
JPS616596B2 (en) 1986-02-27

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