JPS57154675A - Tone arm device - Google Patents
Tone arm deviceInfo
- Publication number
- JPS57154675A JPS57154675A JP4001181A JP4001181A JPS57154675A JP S57154675 A JPS57154675 A JP S57154675A JP 4001181 A JP4001181 A JP 4001181A JP 4001181 A JP4001181 A JP 4001181A JP S57154675 A JPS57154675 A JP S57154675A
- Authority
- JP
- Japan
- Prior art keywords
- horizontal
- vertical
- coil
- yoke
- tone arm
- 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
Abstract
PURPOSE: To exactly detect and control a position, by coaxially providing vertical and horizontal driving sources under a tone arm, and servo-controlling its horizontal rotating movement by an output of an optical potentionmeter.
CONSTITUTION: A tone arm body 1 is supported by an arm base 3 so as to be freely rotatable vertically and horizontally, through a bearing 9, a ringlike member 4 and a bearing 6. The upper end 13 of a lift shaft is fixed to the arm body 1, and to its lower end 11, a vertical driving coil 14 is stuck. The coil 14 is opposed to vertical magnets 17, 18 and forms a magnetic path together with a vertical yoke 16. A yoke 23 provided on the end of the arm base 3, a yoke 24 provided on a horizontal coil holder 12, a horizontal coil 28 and a horizontal magnet 26 form a horizontal magnetic path. Exact positioning and exact operation are executed by detecting and controlling the vertical displacement and the horizontal displacement by a photointerrupter 20, and by irradiating a light beam of a hight emitting element 31 to an optical potentiometer 29, respectively.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4001181A JPS57154675A (en) | 1981-03-18 | 1981-03-18 | Tone arm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4001181A JPS57154675A (en) | 1981-03-18 | 1981-03-18 | Tone arm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57154675A true JPS57154675A (en) | 1982-09-24 |
Family
ID=12568960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4001181A Pending JPS57154675A (en) | 1981-03-18 | 1981-03-18 | Tone arm device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57154675A (en) |
-
1981
- 1981-03-18 JP JP4001181A patent/JPS57154675A/en active Pending
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