JPS59116965A - Positioning device of magnetic disk - Google Patents

Positioning device of magnetic disk

Info

Publication number
JPS59116965A
JPS59116965A JP22382482A JP22382482A JPS59116965A JP S59116965 A JPS59116965 A JP S59116965A JP 22382482 A JP22382482 A JP 22382482A JP 22382482 A JP22382482 A JP 22382482A JP S59116965 A JPS59116965 A JP S59116965A
Authority
JP
Japan
Prior art keywords
base
carriage
force
forces
sub
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
Application number
JP22382482A
Other languages
Japanese (ja)
Other versions
JPH0421945B2 (en
Inventor
Yosuke Seo
瀬尾 洋右
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP22382482A priority Critical patent/JPS59116965A/en
Publication of JPS59116965A publication Critical patent/JPS59116965A/en
Publication of JPH0421945B2 publication Critical patent/JPH0421945B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5521Track change, selection or acquisition by displacement of the head across disk tracks

Abstract

PURPOSE:To get rid of a displacement of a bearing of a revolving shaft part of a carriage, and also to get rid of a back-lash even in case of a sudden standstill of the carriage by constituting so that forces whose direction is different from each other are generated with regard to the revolving shaft by using two actuators. CONSTITUTION:A carriage 1 is provided with two coil bobbins of 4, 4', and driven by a force of F1 and F2. The forces F1, F2 working on the carriage 1 act on the opposite direction to each other, therefore, in case when magnitude of the forces is equal, a couple is generated. In this case, when the center of gravity of the carriage 1 is on the revolving shaft, also, F1 and F2 have the same magnitude and are at an equal distance from the revolving shaft, a force working on the shaft is not generated at all in the revolving shaft 2, and the carriage 1 rotates. Also, a motor of a rotation generated by forces working on the sub-base and having a different direction to each other is made to disappear or is reduced by a damper 9 of rubber, etc. provided between the base and the sub-base.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、磁気ディスクの位置決め装置に関し、特に、
磁気ヘッドを任意のシリンダーに位置決検するロータリ
ーアクチュエーターに関する。
[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a magnetic disk positioning device, and in particular,
This invention relates to a rotary actuator that positions a magnetic head in an arbitrary cylinder.

〔従来技術〕[Prior art]

従来のローターアクチュエーターは、第1図に示す様に
、キャリッジ1が、マグネット3とコイルボビン4を流
れる電流によ多発生する力F1によ多回転し、ヘッドア
ーム5に取付けられたヘッド6t−任意の位置に位置決
めするものである。かかる構成では、キャリッジ1に働
く力F1により、ベース(図示せず)に固定された回転
軸2に直角に働く力Fa’fr発生し、反力としてキャ
リッジ1にF2が働く。また、駆動力F1の反力として
マグネット3にF3の力が働く。軸に働く力F4と反力
F!を無くすには、キャリッジ1の撃力中心を回転軸位
置にすれば良いが、ヘッド位置で必要な速度を得るには
、慣性質量が大きくなるなど実際上好ましくない。キャ
リッジ1と回転軸2はポールベアリングで結合されてい
るため反力F2がキャリッジ1に働くと、ポールベアリ
ングの剛性に応じた変位を生じることになシ、ヘッド位
置決灰 めに際して悪影響を界ぼす欠点がある。また、軸に働く
力F4が働くと、回転軸とベースが固定されているため
、ベースに振il1発生する力となシ、一つのベースに
、複数個のキャリッジを乗せた装置では、ベースが振動
することにより他のキャリッジも振動し、キャリッジ間
の相互干渉を生じる欠点がある。反力F3についてもF
4と同じである。
In the conventional rotor actuator, as shown in FIG. 1, a carriage 1 rotates multiple times due to a force F1 generated by a current flowing through a magnet 3 and a coil bobbin 4, and a head 6t attached to a head arm 5 is rotated by an arbitrary force. It is used for positioning. In this configuration, the force F1 acting on the carriage 1 generates a force Fa'fr acting perpendicularly to the rotating shaft 2 fixed to the base (not shown), and a reaction force F2 acts on the carriage 1. Further, a force F3 acts on the magnet 3 as a reaction force of the driving force F1. Force F4 acting on the axis and reaction force F! In order to eliminate this, it is possible to set the impact force center of the carriage 1 at the rotation axis position, but in order to obtain the necessary speed at the head position, the inertial mass becomes large, which is practically undesirable. Since the carriage 1 and the rotating shaft 2 are connected by a pole bearing, when the reaction force F2 acts on the carriage 1, it will not cause a displacement according to the rigidity of the pole bearing, but will have an adverse effect on the head positioning. There are some drawbacks. In addition, when force F4 is applied to the shaft, since the rotating shaft and the base are fixed, the force il1 is generated on the base.In a device with multiple carriages mounted on one base, the base The vibration also causes other carriages to vibrate, which has the disadvantage of causing mutual interference between the carriages. Regarding the reaction force F3, F
Same as 4.

〔発明の目的〕[Purpose of the invention]

本発明の目的はF4 、Fsのベースに伝わる反浩 力軽減したロータリアクチュエーターを提供する八 ことにある。 The purpose of the present invention is to improve the resistance transmitted to the base of F4 and Fs. 8. Provides a force-reduced rotary actuator. There is a particular thing.

〔発明の概要〕[Summary of the invention]

本発明は、上記Fs 、Faを無くするために、二つの
アクチュエーターを用い、回転軸に関して互いに異なる
向きの力を発生する様に構成することによ’)、F2 
、Fsを無くシ、あるいは軽減し、マグネットの反力は
、サブベースを設け、ベースと分離することにより、F
3の力をベースに伝えない様に構成したことを特徴とす
る。
In order to eliminate the above Fs and Fa, the present invention uses two actuators and is configured to generate forces in different directions with respect to the rotation axis.
, Fs can be eliminated or reduced, and the reaction force of the magnet can be reduced by providing a sub-base and separating it from the base.
It is characterized by being constructed in such a way that the power of 3 is not transmitted to the base.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を図面によシ説明する。 An embodiment of the present invention will be described below with reference to the drawings.

第2図(a)は本発明の一実施例を示す平面図、第2図
(b)はその一部断面を示す図である。キャリッジ1は
、4.4’の二つのコイルボビンを備えてお’)、Ft
とF2の力によシ駆動される。マグネット3.3′は、
サブベース7に固定されている。
FIG. 2(a) is a plan view showing one embodiment of the present invention, and FIG. 2(b) is a partially sectional view thereof. Carriage 1 is equipped with two coil bobbins of 4.4'), Ft
and is driven by the force of F2. Magnet 3.3' is
It is fixed to the sub-base 7.

このサブベース7は、ベース8と、ゴム等のダンパー9
全介して固定されており、また、回転軸2とはボールベ
アリング10により結合される構成になっている。本実
施例によれは、キャリッジ1に働く力Fz 、Fsは互
いに逆向きに働くため、力の大きさが等しい場合には偶
力が発生する。この際、キャリッジ10重心が回転軸上
にあり、かつ、Fl とF2の大きさが同じで回転軸か
ら等距離にあるなら、回転軸2には、全く軸に働く力を
生じることなくキャリッジ1は回転する。また、このと
きマグネツ)4.4’に働く反力F3+F4によっても
サブベース7上に偶力が働くが、サブベース7の重心が
回転軸上にあれば、回転軸に直角に働く力は発生するこ
とはない。サブベースに働く互いに向きの異なる力にょ
シ生じる回転の動きは、ベースとサブベース間に設けた
ゴム等のダンパー9により、消失または軽減する。以上
の様に本発明はアクチュエーターが互いに向きの異なる
二つの力を発生しかつ、サブベースを分離することによ
υベースに伝わる力を無くす、または、軽減することが
できる。なお、本発明は、上記本実施例に限るものでは
なく、例えばサブベースとベースとの結合は摩擦力によ
ることも可能であるし、ダンパーと摩擦力を組み合わせ
ることも可能である。また、キャリッジの重心が回転軸
上にあることが望ましく、また、方向の互いに異なる二
つの力は、偶力を発生することが望ましいが、これに限
定するものではない。
This sub-base 7 includes a base 8 and a damper 9 made of rubber or the like.
It is fixed throughout, and is connected to the rotating shaft 2 by a ball bearing 10. According to this embodiment, the forces Fz and Fs acting on the carriage 1 act in opposite directions, so a couple occurs when the forces are equal in magnitude. At this time, if the center of gravity of the carriage 10 is on the rotation axis, and if Fl and F2 have the same size and are equidistant from the rotation axis, the carriage 1 rotates. Also, at this time, a couple of forces act on the sub-base 7 due to the reaction force F3 + F4 acting on the magnets) 4.4', but if the center of gravity of the sub-base 7 is on the rotation axis, a force acting perpendicular to the rotation axis is generated. There's nothing to do. The rotational movement caused by forces acting on the sub-base in different directions is eliminated or reduced by a damper 9, such as rubber, provided between the base and the sub-base. As described above, in the present invention, the actuator generates two forces in mutually different directions, and by separating the sub-base, the force transmitted to the υ base can be eliminated or reduced. It should be noted that the present invention is not limited to the above-mentioned embodiment; for example, the sub-base and the base may be coupled by frictional force, or it is also possible to combine the damper and frictional force. Further, it is preferable that the center of gravity of the carriage is on the rotation axis, and it is preferable that the two forces in different directions generate a couple, but the present invention is not limited to this.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、キャリッジに互いに向きの異なる二つ
の力を発生させ、回転軸に直角に働く力を与えないもし
くは、軽減することが出来るため、キャリッジの回転軸
部のベアリングの変位を無くすことができ、急激なキャ
リッジの静止に対しても、バックラッシュを無くす効果
がある。また、マグネットがサブベース上に配置され、
サブベースが、゛ベースと分離されていることにより、
ベースに伝わる力を軽減することが出来、ベース振動を
押えられ、同一ベース上に二つ以上のキャリッジを備え
た装置においては、キャリッジ間の相互干渉を軽減でき
る効果がある。
According to the present invention, it is possible to generate two forces in mutually different directions on the carriage, and to eliminate or reduce the force acting perpendicularly to the rotating shaft, thereby eliminating displacement of the bearing on the rotating shaft of the carriage. This has the effect of eliminating backlash even when the carriage comes to a sudden standstill. In addition, a magnet is placed on the sub-base,
By separating the sub-base from the base,
The force transmitted to the base can be reduced, the vibration of the base can be suppressed, and mutual interference between the carriages can be reduced in a device equipped with two or more carriages on the same base.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のロータリーアクチュエーターの概略構成
を示す図、第2図(a)及び(b)は本発明の一実施例
を示す図である。 1・・・アクチュエーター、2・・・回転軸、3・・・
マグネット、4.4′・・・コイル・ボビン、5・・・
ヘッドアーム、6・・・ヘッドジンバルアッセンブリー
、7・・・サブベース、8・・・ベース、9・・・ダン
パー、1o・・・ボールベアリング。 代理人弁理士薄 1)利 幸 ノーーーー〜−一 づ
FIG. 1 is a diagram showing a schematic configuration of a conventional rotary actuator, and FIGS. 2(a) and (b) are diagrams showing an embodiment of the present invention. 1... Actuator, 2... Rotating shaft, 3...
Magnet, 4.4'...Coil bobbin, 5...
Head arm, 6... Head gimbal assembly, 7... Sub base, 8... Base, 9... Damper, 1o... Ball bearing. Representative Patent Attorney Susuki 1) Yuki Toshino--Izuzu

Claims (1)

【特許請求の範囲】[Claims] ロータリーアクチュエーターによシ磁気ヘッドを磁気デ
ィスク上の所定位置に位置決めする磁気ディスクの位置
決め装置において、上記ロータリーアクチュエーターが
、キャリッジの回転軸を中心に互いに向きの異なる力を
発生する、↓うに構成された二つのアクチュエーターか
ら成シ、かつ、上記二つのアクチュエーターは第1のベ
ースから分離された第2のベース上に配置され、上記第
2のベースは、第1のベースに固定された回転軸に対し
て、ベアリングによシ結合されると共に上記ml及び第
2のベースは、ダンピング材あるいは摩擦力により結合
されていることを特徴とする磁気ディスクの位置決め装
置。
In a magnetic disk positioning device for positioning a magnetic head at a predetermined position on a magnetic disk using a rotary actuator, the rotary actuator is configured to generate forces in mutually different directions around a rotation axis of a carriage. It consists of two actuators, and the two actuators are arranged on a second base separated from the first base, and the second base is rotated with respect to a rotating shaft fixed to the first base. A magnetic disk positioning device characterized in that the ML and the second base are coupled by a bearing, and the ML and the second base are coupled by a damping material or a frictional force.
JP22382482A 1982-12-22 1982-12-22 Positioning device of magnetic disk Granted JPS59116965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22382482A JPS59116965A (en) 1982-12-22 1982-12-22 Positioning device of magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22382482A JPS59116965A (en) 1982-12-22 1982-12-22 Positioning device of magnetic disk

Publications (2)

Publication Number Publication Date
JPS59116965A true JPS59116965A (en) 1984-07-06
JPH0421945B2 JPH0421945B2 (en) 1992-04-14

Family

ID=16804291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22382482A Granted JPS59116965A (en) 1982-12-22 1982-12-22 Positioning device of magnetic disk

Country Status (1)

Country Link
JP (1) JPS59116965A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6219909B1 (en) 1990-11-28 2001-04-24 Hitachi, Ltd. Method of mounting disk drive apparatus
US6392848B1 (en) 1998-03-20 2002-05-21 Fujitsu Limited Head carriage assembly and disk device incorporating thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6219909B1 (en) 1990-11-28 2001-04-24 Hitachi, Ltd. Method of mounting disk drive apparatus
US6856482B2 (en) 1990-11-28 2005-02-15 Hitachi, Ltd. Disk drive apparatus and method of mounting same
US7227712B2 (en) 1990-11-28 2007-06-05 Hitachi Global Storage Technologies Japan, Ltd. Disk drive apparatus and method of mounting same
US6392848B1 (en) 1998-03-20 2002-05-21 Fujitsu Limited Head carriage assembly and disk device incorporating thereof

Also Published As

Publication number Publication date
JPH0421945B2 (en) 1992-04-14

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