JPS5723396A - Field system device - Google Patents
Field system deviceInfo
- 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
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.
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)
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 |
-
1980
- 1980-07-15 JP JP9707380A patent/JPS5723396A/en active Pending
Cited By (2)
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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