JPS5723396A - Field system device - Google Patents

Field system device

Info

Publication number
JPS5723396A
JPS5723396A JP9707380A JP9707380A JPS5723396A JP S5723396 A JPS5723396 A JP S5723396A JP 9707380 A JP9707380 A JP 9707380A JP 9707380 A JP9707380 A JP 9707380A JP S5723396 A JPS5723396 A JP S5723396A
Authority
JP
Japan
Prior art keywords
center pole
magnetic flux
system device
field system
circumference
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
JP9707380A
Other languages
Japanese (ja)
Inventor
Koshin Shimada
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 JP9707380A priority Critical patent/JPS5723396A/en
Publication of JPS5723396A publication Critical patent/JPS5723396A/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
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

PURPOSE:To decrease a leakage magnetic flux and to raise a magnetic flux density, by providing a recess part on the end of a center pole, in a field system device which is used for a loudspeaker, etc. CONSTITUTION:As for this field system device, a ringlike magnet 2 and a ringlike plate 3 are provided on the circumference of a center pole 1. On the end of the center pole 1 is provided a recess part 1a. As a result, since length of a magnetic circuit (length of a line of magnetic force) becomes long, a leakage magnetic flux is decreased, and a magnetic flux density in a magnetic gap between the outside circumference of the center pole 1 and the inside circumference of the plate 3 is raised.
JP9707380A 1980-07-15 1980-07-15 Field system device Pending JPS5723396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9707380A JPS5723396A (en) 1980-07-15 1980-07-15 Field system device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9707380A JPS5723396A (en) 1980-07-15 1980-07-15 Field system device

Publications (1)

Publication Number Publication Date
JPS5723396A true JPS5723396A (en) 1982-02-06

Family

ID=14182457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9707380A Pending JPS5723396A (en) 1980-07-15 1980-07-15 Field system device

Country Status (1)

Country Link
JP (1) JPS5723396A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003079962A (en) * 2001-09-11 2003-03-18 Microjenics Inc Eyelid-moving system
WO2010050064A1 (en) * 2008-10-31 2010-05-06 パイオニア株式会社 Speaker device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003079962A (en) * 2001-09-11 2003-03-18 Microjenics Inc Eyelid-moving system
WO2010050064A1 (en) * 2008-10-31 2010-05-06 パイオニア株式会社 Speaker device

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