JPS55147899A - Acoustic transformer - Google Patents

Acoustic transformer

Info

Publication number
JPS55147899A
JPS55147899A JP5649879A JP5649879A JPS55147899A JP S55147899 A JPS55147899 A JP S55147899A JP 5649879 A JP5649879 A JP 5649879A JP 5649879 A JP5649879 A JP 5649879A JP S55147899 A JPS55147899 A JP S55147899A
Authority
JP
Japan
Prior art keywords
tension
diaphragm
given
magnetic field
magnetic
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
JP5649879A
Other languages
Japanese (ja)
Other versions
JPS5830795B2 (en
Inventor
Hiroshi Asaha
Kenji Okamura
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.)
TRIO KENWOOD CORP
Kenwood KK
Original Assignee
TRIO KENWOOD CORP
Kenwood 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 TRIO KENWOOD CORP, Kenwood KK filed Critical TRIO KENWOOD CORP
Priority to JP5649879A priority Critical patent/JPS5830795B2/en
Publication of JPS55147899A publication Critical patent/JPS55147899A/en
Publication of JPS5830795B2 publication Critical patent/JPS5830795B2/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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/24—Tensioning by means acting directly on free portions of diaphragm or cone

Abstract

PURPOSE:To make the product quality and tension uniform, by utilizing a linear magnetic field dependent upon a magnetic circuit magnet to give uniform tension to the film diaphragm. CONSTITUTION:Suction material 8 consisting of magnetic materials is fitted along the center line of hole 3 on film diaphragm. Material 8 is sucked downward by magnetic flux 9 of hole 3, and then, proper tension is given to diaphragm 4. However, since tension is given to the diaphragm through diaphragm support jig 10, this tension acts horizontally on diaphragm part 4a where a conductor pattern as moving coil 7 is provided. Since the magnetic field acting on the suction material is linear approximately, the suction material moves linearly vertically correspondingly to the magnetic field without vertical fluctuation of the position of the moving coil, so that approximately uniform tension can be given.
JP5649879A 1979-05-09 1979-05-09 acoustic transducer Expired JPS5830795B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5649879A JPS5830795B2 (en) 1979-05-09 1979-05-09 acoustic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5649879A JPS5830795B2 (en) 1979-05-09 1979-05-09 acoustic transducer

Publications (2)

Publication Number Publication Date
JPS55147899A true JPS55147899A (en) 1980-11-18
JPS5830795B2 JPS5830795B2 (en) 1983-07-01

Family

ID=13028759

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5649879A Expired JPS5830795B2 (en) 1979-05-09 1979-05-09 acoustic transducer

Country Status (1)

Country Link
JP (1) JPS5830795B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1881732A1 (en) 2006-06-21 2008-01-23 Harman/Becker Automotive Systems GmbH Magnetic membrane suspension
US7940952B2 (en) 2005-01-26 2011-05-10 Harman Becker Automotive Systems Gmbh Electro-acoustic transducer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7940952B2 (en) 2005-01-26 2011-05-10 Harman Becker Automotive Systems Gmbh Electro-acoustic transducer
EP1881732A1 (en) 2006-06-21 2008-01-23 Harman/Becker Automotive Systems GmbH Magnetic membrane suspension
US7940953B2 (en) 2006-06-21 2011-05-10 Harman Becker Automotive Systems Gmbh Magnetic membrane suspension

Also Published As

Publication number Publication date
JPS5830795B2 (en) 1983-07-01

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