JPS55136961A - Moving coil type device - Google Patents
Moving coil type deviceInfo
- Publication number
- JPS55136961A JPS55136961A JP4481479A JP4481479A JPS55136961A JP S55136961 A JPS55136961 A JP S55136961A JP 4481479 A JP4481479 A JP 4481479A JP 4481479 A JP4481479 A JP 4481479A JP S55136961 A JPS55136961 A JP S55136961A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- magnetic field
- notch
- improve
- poles
- 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
Links
Abstract
PURPOSE: To improve the deflection angle characteristics with respect to the input current and thereby to improve the current sensitivity of the coil, and at the same time, to make the device compact and light by providing a notch on a magnet placed in the magnetic field inside a moving coil type device and thereby forming a closed magnetic circuit.
CONSTITUTION: Notch 33 with a depressed cross section is cut on surface 5a of magnet 5 opposite a coil 4 inside the magnetic field. When the depth of this notch 33 is magnetized into an N pole, for example, stepped parts 5b, 5c become N poles of the same polarity. As a result, a magnetic field of the direction opposite to the direction along surface 5a, that is, a counter magnetic field, is set up, and the magnetic field moving from the N poles in the direction perpendicular to the surface of the coil 4 is weakened by this counter magnetic field. By this, the relationship between the rotational angle of the coil 4 and the average magnetic flux density operating on the coil 4 is made uniform. Consequently it is possible to improve the linear characteristics of the rotational angle of the coil 4 with respect to the input current over a wide range, and compared with the lateral width W of the device, the range of the width of coil deflection can be taken wide, so that it is possible to make the device compact and light.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4481479A JPS5834786B2 (en) | 1979-04-12 | 1979-04-12 | Moving coil type device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4481479A JPS5834786B2 (en) | 1979-04-12 | 1979-04-12 | Moving coil type device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55136961A true JPS55136961A (en) | 1980-10-25 |
JPS5834786B2 JPS5834786B2 (en) | 1983-07-28 |
Family
ID=12701890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4481479A Expired JPS5834786B2 (en) | 1979-04-12 | 1979-04-12 | Moving coil type device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5834786B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010182903A (en) * | 2009-02-06 | 2010-08-19 | Shindengen Mechatronics Co Ltd | Rotary solenoid |
JP2010182902A (en) * | 2009-02-06 | 2010-08-19 | Shindengen Mechatronics Co Ltd | Rotary solenoid |
JP2011040456A (en) * | 2009-08-07 | 2011-02-24 | Shindengen Mechatronics Co Ltd | Rotary solenoid |
-
1979
- 1979-04-12 JP JP4481479A patent/JPS5834786B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010182903A (en) * | 2009-02-06 | 2010-08-19 | Shindengen Mechatronics Co Ltd | Rotary solenoid |
JP2010182902A (en) * | 2009-02-06 | 2010-08-19 | Shindengen Mechatronics Co Ltd | Rotary solenoid |
JP2011040456A (en) * | 2009-08-07 | 2011-02-24 | Shindengen Mechatronics Co Ltd | Rotary solenoid |
Also Published As
Publication number | Publication date |
---|---|
JPS5834786B2 (en) | 1983-07-28 |
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