JPS5498611A - Dynamic sounding body - Google Patents

Dynamic sounding body

Info

Publication number
JPS5498611A
JPS5498611A JP15275877A JP15275877A JPS5498611A JP S5498611 A JPS5498611 A JP S5498611A JP 15275877 A JP15275877 A JP 15275877A JP 15275877 A JP15275877 A JP 15275877A JP S5498611 A JPS5498611 A JP S5498611A
Authority
JP
Japan
Prior art keywords
thin film
vibrating
insulating
vibrating thin
beryllium
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
JP15275877A
Other languages
Japanese (ja)
Inventor
Akira Nikaido
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch 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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP15275877A priority Critical patent/JPS5498611A/en
Publication of JPS5498611A publication Critical patent/JPS5498611A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane

Abstract

PURPOSE:To reduce the driving power of sounding body, decrease the dispersion of resonant frequency, and miniaturize the constitution, by forming a thin film of beryllium or the like having an excellent specific modulus of elasticity on the back of an insulating vibrating thin film. CONSTITUTION:A conductive wire 13 is evaporated or etched on the top of an insulating vibrating thin film 5 made from polyimide, mylar or the like to form a conductive metal substance. A metal substance excelling in specific modulus of elasticity (Young's modulus/density), such as beryllium and titanium, is evaporated or sputtered on the back of the vibrating thin film 5 to form a metallic thin film diaphragm 5a. Another vibrating thin film 25 is supported on its outer circumference from the top and back faces by means of insulating fixed thin plate rings 3, 4 which are secured to the vibrating thin film, and is fastened to circular thin plate yokes 1, 2 with fixing rings 6, 7. A pair of permanent magnets 8, 9 are adhered and secured to thin plate yokes 1, 2 respectively. Thus, the dispersion of resonant frequency of the vibrating thin film may be reduced, and the size may be also miniaturized.
JP15275877A 1977-12-19 1977-12-19 Dynamic sounding body Pending JPS5498611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15275877A JPS5498611A (en) 1977-12-19 1977-12-19 Dynamic sounding body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15275877A JPS5498611A (en) 1977-12-19 1977-12-19 Dynamic sounding body

Publications (1)

Publication Number Publication Date
JPS5498611A true JPS5498611A (en) 1979-08-03

Family

ID=15547503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15275877A Pending JPS5498611A (en) 1977-12-19 1977-12-19 Dynamic sounding body

Country Status (1)

Country Link
JP (1) JPS5498611A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905805A (en) * 1994-02-11 1999-05-18 Kirk Acoustics A/S Electrodynamic transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905805A (en) * 1994-02-11 1999-05-18 Kirk Acoustics A/S Electrodynamic transducer

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