JPS579197A - Speaker - Google Patents

Speaker

Info

Publication number
JPS579197A
JPS579197A JP8290380A JP8290380A JPS579197A JP S579197 A JPS579197 A JP S579197A JP 8290380 A JP8290380 A JP 8290380A JP 8290380 A JP8290380 A JP 8290380A JP S579197 A JPS579197 A JP S579197A
Authority
JP
Japan
Prior art keywords
yoke plate
permanent magnet
density distribution
center pole
magnetic circuit
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
JP8290380A
Other languages
Japanese (ja)
Other versions
JPS6247398B2 (en
Inventor
Koji Kito
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8290380A priority Critical patent/JPS6247398B2/ja
Publication of JPS579197A publication Critical patent/JPS579197A/en
Publication of JPS6247398B2 publication Critical patent/JPS6247398B2/ja
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/025Magnetic circuit

Abstract

PURPOSE:To reduce the deformation due to hamonics of an even number of order, by obtaining a symmetrical magnetic flux density distribution having double peaks to the oscillation of a voice coil. CONSTITUTION:The 1st magnetic circuit 13' consists of the 1st permanent magnet 11', the 1st yoke plate 10, the 2nd yoke plate 10' and a center pole 9, and the 2nd magnetic circuit 13'' consists of the 3rd yoke plate 10'', the 2nd permanent magnet 11'', the 4th yoke plate 10''' and the center pole 9. a symmetrical magnetic density distribution having double peaks can be obtained by inversing the direction of magnetization of the magnets 11' and 11''. Thus, the loudness characteristic can be increased and the harmonic deformation of the even order number can be reduced.
JP8290380A 1980-06-20 1980-06-20 Expired JPS6247398B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8290380A JPS6247398B2 (en) 1980-06-20 1980-06-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8290380A JPS6247398B2 (en) 1980-06-20 1980-06-20

Publications (2)

Publication Number Publication Date
JPS579197A true JPS579197A (en) 1982-01-18
JPS6247398B2 JPS6247398B2 (en) 1987-10-07

Family

ID=13787209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8290380A Expired JPS6247398B2 (en) 1980-06-20 1980-06-20

Country Status (1)

Country Link
JP (1) JPS6247398B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4868882A (en) * 1987-09-10 1989-09-19 Daimler-Benz Ag Loudspeaker
EP0942626A2 (en) * 1998-03-11 1999-09-15 Sony Corporation Loudspeaker
EP2487933A1 (en) * 2011-02-14 2012-08-15 Robert Bosch GmbH Multiple magnetic air gap motor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS641699U (en) * 1987-06-23 1989-01-06
JPH0237095U (en) * 1988-08-31 1990-03-12

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4868882A (en) * 1987-09-10 1989-09-19 Daimler-Benz Ag Loudspeaker
EP0942626A2 (en) * 1998-03-11 1999-09-15 Sony Corporation Loudspeaker
EP0942626A3 (en) * 1998-03-11 2006-03-29 Sony Corporation Loudspeaker
EP2487933A1 (en) * 2011-02-14 2012-08-15 Robert Bosch GmbH Multiple magnetic air gap motor
CN102740194A (en) * 2011-02-14 2012-10-17 博世安防系统有限公司 Multiple magnetic air gap motor

Also Published As

Publication number Publication date
JPS6247398B2 (en) 1987-10-07

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