JPH0366573U - - Google Patents
Info
- Publication number
- JPH0366573U JPH0366573U JP12631989U JP12631989U JPH0366573U JP H0366573 U JPH0366573 U JP H0366573U JP 12631989 U JP12631989 U JP 12631989U JP 12631989 U JP12631989 U JP 12631989U JP H0366573 U JPH0366573 U JP H0366573U
- Authority
- JP
- Japan
- Prior art keywords
- coil
- arm
- magnet
- permanent magnet
- magnetic disk
- 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
- Moving Of Heads (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Description
第１図は本考案になる磁気デイスク用アクチユ
エータの一実施例が適用された磁気デイスク装置
の平面図、第２図は本考案の要部を説明するため
の縦断面図、第３図は第２図中−線に沿う横
断面図、第４図は第２図中矢印Ｂ方向からの矢視
図、第５図Ａ，Ｂ，Ｃは夫々検出コイルの出力電
圧、補償コイルの出力電圧、検出コイルと補償コ
イルとの合成出力電圧を説明するための線図、第
６図は補償回路の回路図、第７図は第６図の回路
を簡略化した場合の回路図、第８図は本考案の応
用例の縦断面図である。
１……デイスク、２……ベース、３……アーム
、４……軸、５……ヘツド、６……アクチユエー
タ、９，１１……ヨーク、１０，１５……永久磁
石、１２……補償コイル、１３……検出コイル、
１６……下側ヨーク、１７……駆動コイル、１８
……上側ヨーク、２０，２１……増幅器、２２…
…差動増幅器。
FIG. 1 is a plan view of a magnetic disk device to which an embodiment of the magnetic disk actuator according to the present invention is applied, FIG. 2 is a longitudinal cross-sectional view for explaining the main parts of the present invention, and FIG. 2. FIG. 4 is a cross-sectional view taken along the line - in FIG. 2. FIG. 4 is a view taken from the direction of arrow B in FIG. 2. FIG. A diagram for explaining the combined output voltage of the detection coil and the compensation coil, Figure 6 is a circuit diagram of the compensation circuit, Figure 7 is a simplified circuit diagram of the circuit in Figure 6, and Figure 8 is a diagram for explaining the combined output voltage of the detection coil and compensation coil. FIG. 3 is a vertical cross-sectional view of an application example of the present invention. 1... Disc, 2... Base, 3... Arm, 4... Axis, 5... Head, 6... Actuator, 9, 11... Yoke, 10, 15... Permanent magnet, 12... Compensation coil , 13... detection coil,
16... Lower yoke, 17... Drive coil, 18
...Upper yoke, 20, 21...Amplifier, 22...
...Differential amplifier.
Claims (1)
該ヘツドを磁気デイスクの半径方向に駆動させる
駆動コイルと、 前記駆動コイルと対向する位置に設けられた第
１の永久磁石と、 前記駆動コイルと直交する方向に延在し、前記
アームの回動軸と同心円状に設けられた円弧状の
第２の永久磁石と、 前記第２の永久磁石に対向するうよう駆動コイ
ルと直交する向きで設けられアームの速度信号を
出力する検出コイルと、 前記検出コイルに近接対向するように設けられ
外部磁界からのノイズを検出する補償コイルと、 を有し、前記検出コイル又は補償コイル及び第２
の永久磁石のいずれか一方をアームに取付け、い
ずれか他方を固定部に固着してなる磁気デイスク
用アクチユエータ。[Claims for Utility Model Registration] A drive coil provided at the other end of an arm having a head at one end and driving the head in the radial direction of the magnetic disk; and a first permanent magnet provided at a position facing the drive coil. a magnet; a second arc-shaped permanent magnet that extends in a direction perpendicular to the drive coil and is provided concentrically with the rotation axis of the arm; and a magnet that is driven to face the second permanent magnet. a detection coil that is provided in a direction perpendicular to the coil and outputs a speed signal of the arm; and a compensation coil that is provided close to and opposite to the detection coil and detects noise from an external magnetic field, and the detection coil or Compensation coil and second
A magnetic disk actuator in which one of the permanent magnets is attached to an arm, and the other is fixed to a fixed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12631989U JPH0366573U (en) | 1989-10-27 | 1989-10-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12631989U JPH0366573U (en) | 1989-10-27 | 1989-10-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0366573U true JPH0366573U (en) | 1991-06-27 |
Family
ID=31674134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12631989U Pending JPH0366573U (en) | 1989-10-27 | 1989-10-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0366573U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044478B2 (en) * | 1981-11-02 | 1985-10-03 | 住友金属鉱山株式会社 | Wing bit for ground excavation |
-
1989
- 1989-10-27 JP JP12631989U patent/JPH0366573U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044478B2 (en) * | 1981-11-02 | 1985-10-03 | 住友金属鉱山株式会社 | Wing bit for ground excavation |
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