JPS6449500A - Magnetic circuit - Google Patents
Magnetic circuitInfo
- Publication number
- JPS6449500A JPS6449500A JP20711287A JP20711287A JPS6449500A JP S6449500 A JPS6449500 A JP S6449500A JP 20711287 A JP20711287 A JP 20711287A JP 20711287 A JP20711287 A JP 20711287A JP S6449500 A JPS6449500 A JP S6449500A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- pole piece
- magnetic circuit
- coil
- peripheral surface
- 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
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
PURPOSE:To form a magnetic circuit which is small-sized and whose stroke is long by using a cylinder-shaped magnet having a radial anisotropy to function as the counter electrode of a pole piece. CONSTITUTION:A cylinder-shaped magnet 11 having the radial anisotropy is provided concentrically with a pole piece 10. Between the peripheral surface of the magnet 11 and the peripheral surface of the pole piece 10, a magnetic gap 13 in which a voice coil 12 is interposed is formed. Consequently, the mag net 11 functions as the counter electrode to the pole piece 10. Thus, as the length of the magnet 11 is made long, the stroke to linear-drive a coil bobbin 14 to wind a coil 12 can be made long. Since the magnet 11 can be formed to be thin, the maximum outer diameter of the magnetic circuit can be made small.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20711287A JPS6449500A (en) | 1987-08-20 | 1987-08-20 | Magnetic circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20711287A JPS6449500A (en) | 1987-08-20 | 1987-08-20 | Magnetic circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6449500A true JPS6449500A (en) | 1989-02-23 |
Family
ID=16534396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20711287A Pending JPS6449500A (en) | 1987-08-20 | 1987-08-20 | Magnetic circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6449500A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0598391A2 (en) * | 1992-11-18 | 1994-05-25 | Matsushita Electric Industrial Co., Ltd. | Speaker apparatus and television receiver using the same |
EP0616751A1 (en) * | 1991-08-05 | 1994-09-28 | Aura Systems, Inc. | Voice coil actuator |
AU672953B2 (en) * | 1991-08-05 | 1996-10-24 | Speaker Acquisition Sub | Voice coil actuator |
-
1987
- 1987-08-20 JP JP20711287A patent/JPS6449500A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0616751A1 (en) * | 1991-08-05 | 1994-09-28 | Aura Systems, Inc. | Voice coil actuator |
EP0616751A4 (en) * | 1991-08-05 | 1995-05-17 | Aura Systems Inc | Voice coil actuator. |
AU672953B2 (en) * | 1991-08-05 | 1996-10-24 | Speaker Acquisition Sub | Voice coil actuator |
EP0598391A2 (en) * | 1992-11-18 | 1994-05-25 | Matsushita Electric Industrial Co., Ltd. | Speaker apparatus and television receiver using the same |
EP0598391A3 (en) * | 1992-11-18 | 1995-03-08 | Matsushita Electric Ind Co Ltd | Speaker apparatus and television receiver using the same. |
US5455867A (en) * | 1992-11-18 | 1995-10-03 | Matsushita Electric Industrial Co., Ltd. | Speaker apparatus and television receiver using the same |
EP0748116A1 (en) * | 1992-11-18 | 1996-12-11 | Matsushita Electric Industrial Co., Ltd. | Speaker apparatus of a television receiver |
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