JPH05151636A - Optical disk device - Google Patents

Optical disk device

Info

Publication number
JPH05151636A
JPH05151636A JP31226191A JP31226191A JPH05151636A JP H05151636 A JPH05151636 A JP H05151636A JP 31226191 A JP31226191 A JP 31226191A JP 31226191 A JP31226191 A JP 31226191A JP H05151636 A JPH05151636 A JP H05151636A
Authority
JP
Japan
Prior art keywords
movable head
force
support shafts
magneto
optical 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
Application number
JP31226191A
Other languages
Japanese (ja)
Inventor
Tomohiro Makigaki
奉宏 牧垣
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP31226191A priority Critical patent/JPH05151636A/en
Publication of JPH05151636A publication Critical patent/JPH05151636A/en
Pending legal-status Critical Current

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  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Moving Of Heads (AREA)

Abstract

PURPOSE:To prevent the degradation of an optical signal in accordance with the drive of a movable head by supporting the movable head to be freely movable in the direction of a radius of a magneto-optical disk and applying one or two or above driving force to the movable head. CONSTITUTION:Yokes 26, 27 and 28 are arranged in parallel along supporting shafts 21, 22 and 23 and magnets 29, 30 are attached on the yokes 26, 28 sides of the opposing surfaces of the yokes 26, 27 and 28. On the other hand, a coil 31 surrounding the yoke 27 is fixed on a carriage 24. Then magnetic field formed by the magnets 29, 30 is linked with the coil 31 between the yokes 26, 27 and 28. Then, the movable head is moved stably along the supporting shafts 21, 22 and 23 by the resultant force of the driving force applied to the coil 31 by energizing the coil 31. Thus, the vibration of the movable head is evaded.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、光学式ディスク装置に
関し、特に可動ヘッドの安定した駆動を可能としたもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device, and more particularly, to a stable driving of a movable head.

【０００２】[0002]

【従来の技術】図１に従来の光学式ディスク装置を示
す。同図に示す光学式ディスク装置は、可動ヘッドを２
本の支持軸１，２により移動自在としたものである。即
ち、２本の支持軸１，２が図示しない光磁気ディスクの
半径方向に沿って平行に配設されると共にこれら支持軸
１，２にキャリッジ３が複数のベアリング４を介して移
動自在に装着されている。キャリッジ３には、図示しな
いミラー、対物レンズ等の光学系が搭載され、図示しな
い光源から出射された光ビームは光学系により反射して
光磁気ディスクに導かれ、記録再生が行われるようにな
っている。2. Description of the Related Art FIG. 1 shows a conventional optical disk device. The optical disk device shown in the figure has two movable heads.
It is movable by the supporting shafts 1 and 2 of the book. That is, two support shafts 1 and 2 are arranged in parallel along the radial direction of a magneto-optical disk (not shown), and a carriage 3 is movably mounted on these support shafts 1 and 2 via a plurality of bearings 4. Has been done. An optical system such as a mirror and an objective lens (not shown) is mounted on the carriage 3, and a light beam emitted from a light source (not shown) is reflected by the optical system to be guided to a magneto-optical disk for recording and reproduction. ing.

【０００３】支持軸１，２の左右両側には、それらに沿
ってヨーク５，６，７，８が平行に配設されている。ヨ
ーク５，６とヨーク７，８との向かい合う面のうち、ヨ
ーク６，８側には磁石９，１０が装着される一方、ヨー
ク５，７を取り囲むコイル１１，１２がキャリッジ３に
固定されている。従って、磁石９，１０により形成され
る磁界は、ヨーク５，６及び７，８との間においてコイ
ル１１，１２と鎖交する。この為、コイル１１，１２に
図中に示す方向に通電することにより、キャリッジ３を
含めた可動ヘッドに対して二箇所に駆動力が作用する。
可動ヘッドは、駆動力の合力により、支持軸１，２に沿
って移動することになる。On the left and right sides of the support shafts 1 and 2, yokes 5, 6, 7, and 8 are arranged in parallel along them. Of the surfaces of the yokes 5, 6 and the yokes 7, 8 facing each other, the magnets 9, 10 are mounted on the yokes 6, 8 side, while the coils 11, 12 surrounding the yokes 5, 7 are fixed to the carriage 3. There is. Therefore, the magnetic field formed by the magnets 9 and 10 interlinks with the coils 11 and 12 between the yokes 5, 6 and 7, 8. Therefore, by energizing the coils 11 and 12 in the direction shown in the figure, a driving force acts on the movable head including the carriage 3 at two locations.
The movable head moves along the support shafts 1 and 2 by the resultant force of the driving forces.

【０００４】[0004]

【発明が解決しようとする課題】上記光学式ディスク装
置において、可動ヘッドを安定して移動させる為には、
図２に示すように、キャリッジ３、光学系、ベアリング
等よりなる可動ヘッドの重心と駆動力の合力の作用する
位置が出来るだけ近いことが望ましい。図２中、可動ヘ
ッドの重心は〇印で示し、駆動力の作用する位置及びそ
の合力の作用する位置は〇印に×印を付けて示す。しか
し、可動ヘッドの重心が駆動力の合力の作用する位置に
一致し又は近接する場合でも、従来の光学式ディスク装
置においては、支持軸１，２の位置に対する駆動力の合
力の作用する力点の位置関係については特に考慮されな
かった。In the above optical disc device, in order to move the movable head in a stable manner,
As shown in FIG. 2, it is desirable that the position at which the resultant force of the driving force and the center of gravity of the movable head composed of the carriage 3, the optical system, the bearing, etc. acts as close as possible. In FIG. 2, the center of gravity of the movable head is indicated by a circle, and the position at which the driving force acts and the position at which the resultant force acts are indicated by a circle on the circle. However, even when the center of gravity of the movable head coincides with or approaches the position where the resultant force of the driving force acts, in the conventional optical disk device, the force point of the resultant force of the driving force with respect to the positions of the supporting shafts 1 and 2 acts. No particular consideration was given to the positional relationship.

【０００５】そのため、駆動力が可動ヘッドを支持軸
１，２に沿って平行に移動させる力として作用するだけ
でなく、支持軸１，２を撓ませる方向のモーメントとし
て作用するため、可動ヘッド自体が振動したり、支持軸
１，２との間で共振することがあり、それにより、可動
ヘッドの位置制御が不安定となり、光学信号の品質が劣
化することがあった。本発明は、上記従来技術に鑑みて
なされたものであり、可動ヘッドを振動なく安定して移
動させるためには、支持軸の位置との関係において、可
動ヘッドの重心及び駆動力の合力の作用する力点との配
置を調整することが重要であることに着目してなされた
ものである。Therefore, the driving force acts not only as a force for moving the movable heads in parallel along the support shafts 1 and 2, but also as a moment in a direction of bending the support shafts 1 and 2, so that the movable head itself. Sometimes vibrates or resonates with the support shafts 1 and 2, which makes the position control of the movable head unstable and deteriorates the quality of the optical signal. The present invention has been made in view of the above-mentioned prior art, and in order to move the movable head stably without vibration, the action of the resultant force of the center of gravity of the movable head and the driving force in relation to the position of the support shaft. This was done focusing on the importance of adjusting the arrangement with the emphasis point.

【０００６】[0006]

【課題を解決するための手段】斯かる目的を達成する本
発明の構成は複数の支持軸により可動ヘッドを光磁気デ
ィスクに対して半径方向に移動自在に支持し、該可動ヘ
ッドに対して一又は二以上の駆動力を作用させることに
より前記可動ヘッドを移動させ、前記光磁気ディスクに
対して光磁気記録再生を行う光学式ディスク装置におい
て、前記可動ヘッドの重心及び一の駆動力の作用する力
点又は二以上の駆動力が作用するときにはそれらの駆動
力の合力の作用する力点が前記複数の支持軸の大きさに
よって囲まれる範囲にあることを特徴とする。また、可
動ヘッドの重心は、一の駆動力の作用する力点又は二以
上の駆動力が作用するときにはそれらの駆動力の合力の
作用する力点に一致することが望ましい。The structure of the present invention that achieves the above object supports a movable head in a radial direction with respect to a magneto-optical disk by a plurality of support shafts, and supports the movable head with respect to the movable head. Alternatively, in the optical disk device that moves the movable head by applying two or more driving forces to perform magneto-optical recording / reproduction with respect to the magneto-optical disk, the center of gravity of the movable head and one driving force act. When a force point or two or more driving forces act, a force point on which a resultant force of the driving forces acts is in a range surrounded by the sizes of the plurality of support shafts. Further, it is desirable that the center of gravity of the movable head coincides with a force point on which one driving force acts or a force point on which a resultant force of the driving forces acts when two or more driving forces act.

【０００７】[0007]

【実施例】以下、本発明について、図面に示す実施例を
参照して詳細に説明する。図３に本発明の第一の実施例
を示す。同図に示す実施例では、可動ヘッドを２本の支
持軸１，２により移動自在としたものである。即ち、２
本の支持軸１，２が図示しない光磁気ディスクの半径方
向に沿って平行に配設されると共にこれら支持軸１，２
にはキャリッジ３が複数のベアリング４を介して移動自
在に装着されている。キャリッジ３には、図示しないミ
ラー、対物レンズ等の光学系が搭載され、図示しない光
源から出射された光ビームは光学系により反射して光磁
気ディスクに導かれ、記録再生が行われるようになって
いる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 3 shows a first embodiment of the present invention. In the embodiment shown in the figure, the movable head is made movable by two support shafts 1 and 2. That is, 2
The supporting shafts 1 and 2 of the book are arranged in parallel along the radial direction of a magneto-optical disk (not shown), and
A carriage 3 is movably mounted on the carriage via a plurality of bearings 4. An optical system such as a mirror and an objective lens (not shown) is mounted on the carriage 3, and a light beam emitted from a light source (not shown) is reflected by the optical system to be guided to a magneto-optical disk for recording / reproducing. ing.

【０００８】支持軸１，２の左右両側には、それらに沿
ってヨーク５，６，７，８が平行に配設されている。ヨ
ーク５，６とヨーク７，８との向かい合う面のうち、ヨ
ーク６，８側には磁石９，１０が装着される一方、ヨー
ク５，７を取り囲むコイル１１，１２がキャリッジ３に
固定されている。従って、磁石９，１０により形成され
る磁界は、ヨーク５，６及び７，８との間においてコイ
ル１１，１２と鎖交する。この為、コイル１１，１２に
通電することにより、キャリッジ３を含めた可動ヘッド
に対して二箇所に駆動力が作用する。可動ヘッドは、左
右のコイル１１，１２に作用する駆動力の合力により、
支持軸１，２に沿って移動することになる。On the left and right sides of the support shafts 1 and 2, yokes 5, 6, 7, and 8 are arranged in parallel along them. Of the surfaces of the yokes 5, 6 and the yokes 7, 8 that face each other, the magnets 9, 10 are mounted on the yokes 6, 8 side, while the coils 11, 12 surrounding the yokes 5, 7 are fixed to the carriage 3. There is. Therefore, the magnetic field formed by the magnets 9 and 10 interlinks with the coils 11 and 12 between the yokes 5, 6 and 7, 8. Therefore, when the coils 11 and 12 are energized, the driving force acts on the movable head including the carriage 3 at two places. The movable head, by the resultant force of the driving force acting on the left and right coils 11, 12,
It will move along the support shafts 1, 2.

【０００９】ここで、キャリッジ３、ベアリング４、光
学系等よりなる可動ヘッドの重心及び各コイル１１，１
２に作用する二つの駆動力の合力の作用する力点は、２
本の支持軸１，２の大きさによって囲まれる範囲にあ
る。つまり、本実施例は、従来に比較し、可動ヘッドの
重心及び各コイル１１，１２に作用する二つの駆動力の
合力の作用する力点位置を、図３に示すように下げたも
のである。図３中、可動ヘッドの重心は〇印で示し、駆
動力の作用する位置及びその合力の作用する位置は〇印
に×印を付けて示す。また、２本の支持軸１，２の大き
さによって囲まれる範囲は、図中一点鎖線で示す。Here, the center of gravity of the movable head composed of the carriage 3, the bearing 4, the optical system, etc., and the coils 11, 1
The force point where the resultant force of the two driving forces acting on 2 acts is 2
It is in a range surrounded by the sizes of the support shafts 1 and 2 of the book. That is, in the present embodiment, as compared with the prior art, the center of gravity of the movable head and the force point position where the resultant force of the two driving forces acting on the coils 11 and 12 act are lowered as shown in FIG. In FIG. 3, the center of gravity of the movable head is indicated by a circle, and the position on which the driving force acts and the position on which the resultant force acts are indicated by a circle on the circle. A range surrounded by the sizes of the two support shafts 1 and 2 is indicated by a chain line in the figure.

【００１０】従って、駆動力の合力は可動ヘッドを支持
軸１，２の方向に沿って移動させる為の力として作用す
るのみであり、支持軸１，２を撓ませる方向のモーメン
トとしては作用しない。この為、可動ヘッドは支持軸
１，２に沿って安定して移動し、可動ヘッドの振動を回
避することが出来る。また、本実施例では、可動ヘッド
の重心の位置が駆動力の作用する位置に略一致している
ので、可動ヘッドの一層安定した移動が可能となる。
尚、上記実施例においては、二つ駆動力が作用していた
が、本発明においては駆動力は少なくとも一つ以上あれ
ば良く、例えば、図４に示す第二の実施例のように四つ
の駆動力を作用させても良いし、図５に示す第三の実施
例のように一つの駆動力を作用させても良い。Therefore, the resultant driving force acts only as a force for moving the movable head along the directions of the support shafts 1 and 2, and does not act as a moment in the direction of bending the support shafts 1 and 2. .. Therefore, the movable head moves stably along the support shafts 1 and 2, and the vibration of the movable head can be avoided. Further, in the present embodiment, the position of the center of gravity of the movable head is substantially coincident with the position where the driving force acts, so that the movable head can be moved more stably.
In the above embodiment, two driving forces acted, but in the present invention, at least one driving force is sufficient. For example, four driving forces as in the second embodiment shown in FIG. The driving force may be applied, or one driving force may be applied as in the third embodiment shown in FIG.

【００１１】即ち、第二の実施例では、ヨーク１３，１
４及び磁石１５，１６を追加し、これらをヨーク５，７
に対してヨーク６，８及び磁石９，１０と対称に配置し
たものである。従って、コイル１１，１２に通電する
と、各磁石９，１０，１５，１６と向かい合う位置にお
いて四つの駆動力が発生することになる。また、キャリ
ッジ３の突起部を低くした。その他の構成は、前述した
実施例と同様である。第二の実施例においても、可動ヘ
ッドの重心及び四つの駆動力の合力は、支持軸１，２の
大きさの範囲内にあるため、駆動力の合力は可動ヘッド
を支持軸１，２に沿って移動させる方向の力のみとして
作用する。この為、可動ヘッドは駆動力の合力により支
持軸１，２に沿って安定して移動し、振動を起こすこと
もなく、また、支持軸１，２との間で共振を起こすこと
もない。That is, in the second embodiment, the yokes 13 and 1 are
4 and magnets 15 and 16 are added, and these are connected to the yokes 5 and 7.
On the other hand, the yokes 6 and 8 and the magnets 9 and 10 are arranged symmetrically. Therefore, when the coils 11 and 12 are energized, four driving forces are generated at positions facing the magnets 9, 10, 15, and 16. Further, the protrusion of the carriage 3 is lowered. Other configurations are the same as those in the above-described embodiment. Also in the second embodiment, the center of gravity of the movable head and the resultant force of the four driving forces are within the range of the sizes of the support shafts 1 and 2, so that the resultant force of the driving forces the movable head to the support shafts 1 and 2. It acts only as a force to move along. Therefore, the movable head stably moves along the supporting shafts 1 and 2 due to the resultant force of the driving force, does not cause vibration, and does not cause resonance with the supporting shafts 1 and 2.

【００１２】一方、第三の実施例では、一方のヨーク、
磁石及びコイルを省略し、他方のヨーク８、磁石１０の
配置を支持軸１，２と水平に配置したものである。その
他の構成は前述した実施例と同様である。従って、本実
施例では、ヨーク、磁石及びコイルの省略により、光学
式ディスク装置の小型計量化が可能となる利点がある。
但し、駆動力の力点は、支持軸１，２に対して対称な位
置になく、また、可動ヘッドの重心位置に対して離れて
いる為、安定性に難がある。次に、本発明の第四の実施
例を図６を参照して説明する。本実施例は、三つの支持
軸により可動ヘッドを移動自在に支持するものである。
即ち、３本の支持軸２１，２２，２３が図示しない光磁
気ディスクの半径方向に沿って平行に配設されると共に
これら支持軸２１，２２，２３にはキャリッジ２４が複
数のベアリング２５を介して移動自在に装着されてい
る。キャリッジ２４には、図示しない光学系が搭載され
ている。On the other hand, in the third embodiment, one yoke,
The magnet and the coil are omitted, and the other yoke 8 and the magnet 10 are arranged horizontally with the support shafts 1 and 2. Other configurations are the same as those in the above-described embodiment. Therefore, in the present embodiment, there is an advantage that the optical disc device can be miniaturized by omitting the yoke, the magnet and the coil.
However, the force point of the driving force is not at a symmetrical position with respect to the support shafts 1 and 2, and is far from the position of the center of gravity of the movable head, so that stability is difficult. Next, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, the movable head is movably supported by three support shafts.
That is, the three support shafts 21, 22, 23 are arranged in parallel along the radial direction of the magneto-optical disk (not shown), and the carriage 24 is mounted on these support shafts 21, 22, 23 via a plurality of bearings 25. It is mounted so that it can move freely. An optical system (not shown) is mounted on the carriage 24.

【００１３】支持軸２１，２２，２３に沿ってヨーク２
６，２７，２８が平行に配設されており、ヨーク２６，
２７，２８の向かい合う面のうち、ヨーク２６，２８側
には磁石２９，３０が装着されている。一方、ヨーク２
７を取り囲むコイル３１がキャリッジ２４に固定されて
いる。従って、磁石２９，３０により形成される磁界
は、ヨーク２６，２７及び２８との間においてコイル３
１と鎖交する。この為、コイル３に通電することによ
り、キャリッジ２４を含めた可動ヘッドに対して二箇所
に駆動力が作用する。可動ヘッドは、コイル３１に作用
する駆動力の合力により、支持軸２１，２２，２３に沿
って移動することになる。The yoke 2 is provided along the support shafts 21, 22, 23.
6, 27, 28 are arranged in parallel, and the yoke 26,
Magnets 29 and 30 are attached to the yokes 26 and 28 side of the surfaces facing each other. On the other hand, the yoke 2
A coil 31 that surrounds 7 is fixed to the carriage 24. Therefore, the magnetic field formed by the magnets 29, 30 is applied to the coil 3 between the yokes 26, 27 and 28.
Interlink with 1. Therefore, when the coil 3 is energized, the driving force acts on the movable head including the carriage 24 at two positions. The movable head is moved along the support shafts 21, 22, and 23 by the resultant force of the driving forces acting on the coil 31.

【００１４】ここで、キャリッジ２４、ベアリング２
５、光学系等よりなる可動ヘッドの重心及び各コイル３
１に作用する二つの駆動力の合力の作用する力点は、３
本の支持軸２１，２２，２３の大きさによって囲まれる
範囲にある。図３中、可動ヘッドの重心は〇印で示し、
駆動力の作用する位置及びその合力の作用する位置は〇
印に×印を付けて示す。また、２本の支持軸１，２の大
きさによって囲まれる範囲は、図中一点鎖線で示す。従
って、駆動力の合力は可動ヘッドを支持軸２１，２２，
２３の方向に沿って移動させる為の力として作用するの
みであり、支持軸２１，２２，２３を撓ませる方向のモ
ーメントとしては作用しない。Here, the carriage 24 and the bearing 2
5. Center of gravity of movable head composed of optical system and coils 3
The force point of the resultant force of the two driving forces acting on 1 is 3
It is in the range surrounded by the sizes of the book support shafts 21, 22, and 23. In FIG. 3, the center of gravity of the movable head is indicated by a circle,
The position on which the driving force acts and the position on which the resultant force acts are indicated by a circle on the circle. A range surrounded by the sizes of the two support shafts 1 and 2 is indicated by a chain line in the figure. Therefore, the total force of the driving force is such that the movable head is supported by the support shafts 21, 22,
It acts only as a force for moving along the direction of 23, and does not act as a moment in the direction of bending the support shafts 21, 22, 23.

【００１５】この為、可動ヘッドは支持軸２１，２２に
沿って安定して移動し、可動ヘッドの振動を回避するこ
とが出来る。このように本実施例では、３本の支持軸２
１，２２，２３により可動ヘッドを支持するので、支持
軸２１，２２，２３の大きさにより囲まれる範囲が広が
り、その範囲内に可動ヘッドの重心位置及び駆動力の合
力の位置を容易に位置させることができる利点がある。Therefore, the movable head can move stably along the support shafts 21 and 22, and the vibration of the movable head can be avoided. Thus, in this embodiment, the three support shafts 2
Since the movable head is supported by 1, 22, 23, the range surrounded by the size of the support shafts 21, 22, 23 is expanded, and the position of the center of gravity of the movable head and the position of the resultant force of the driving force can be easily positioned within the range. There is an advantage that can be made.

【００１６】[0016]

【発明の効果】以上、実施例に基づいて具体的に説明し
たように、本発明は支持軸の位置に対して、可動ヘッド
の重心位置及び駆動力の作用する力点の位置を考慮し、
駆動力により支持軸に対して撓み方向のモーメントを発
生しないようにしたので、可動ヘッドは振動なく安定し
て移動することができる。この為、可動ヘッドの振動に
伴う光学信号の劣化を防止することが可能となる。As described above in detail with reference to the embodiments, the present invention considers the position of the center of gravity of the movable head and the position of the force point on which the driving force acts, with respect to the position of the support shaft,
Since the driving force does not generate a moment in the bending direction with respect to the support shaft, the movable head can move stably without vibration. Therefore, it is possible to prevent the deterioration of the optical signal due to the vibration of the movable head.

【図面の簡単な説明】[Brief description of drawings]

【図１】同図(a)(c)は、従来の光学式ディスク装置の平
面図、側面図、同図(b) は同図(a) 中のＡ−Ａ断面図で
ある。1A and 1C are a plan view and a side view of a conventional optical disk device, and FIG. 1B is a sectional view taken along line AA in FIG. 1A.

【図２】従来の可動ヘッドの重心の位置、駆動力の合力
の作用する力点の位置を示す説明図である。FIG. 2 is an explanatory view showing a position of a center of gravity of a conventional movable head and a position of a force point on which a resultant force of driving forces acts.

【図３】本発明の第一の実施例に係る光学式ディスク装
置を示す説明図である。FIG. 3 is an explanatory diagram showing an optical disc device according to a first embodiment of the present invention.

【図４】本発明の第二の実施例に係る光学式ディスク装
置を示す説明図である。FIG. 4 is an explanatory diagram showing an optical disc device according to a second embodiment of the invention.

【図５】本発明の第三の実施例に係る光学式ディスク装
置を示す説明図である。FIG. 5 is an explanatory diagram showing an optical disc device according to a third embodiment of the invention.

【図６】本発明の第四の実施例に係る光学式ディスク装
置を示す説明図である。FIG. 6 is an explanatory diagram showing an optical disc device according to a fourth embodiment of the invention.

【符号の説明】[Explanation of symbols]

１，２，２１，２２，２３ 支持軸 ３，２４ キャリッジ ４，２５ ベアリング ５，６，７，８，１３，１４，２６，２７，２８ ヨー
ク ９，１０，１５，１６ 磁石 １１，１２，３１ コイル1,2,21,22,23 Support shaft 3,24 Carriage 4,25 Bearing 5,6,7,8,13,14,26,27,28 Yoke 9,10,15,16 Magnet 11,12,31 coil

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 複数の支持軸により可動ヘッドを光磁気
ディスクに対して半径方向に移動自在に支持し、該可動
ヘッドに対して一又は二以上の駆動力を作用させること
により前記可動ヘッドを移動させ、前記光磁気ディスク
に対して光磁気記録再生を行う光学式ディスク装置にお
いて、前記可動ヘッドの重心及び一の駆動力の作用する
力点又は二以上の駆動力が作用するときにはそれらの駆
動力の合力の作用する力点が前記複数の支持軸の大きさ
によって囲まれる範囲にあることを特徴とする光学式デ
ィスク装置。1. A movable head is supported movably in a radial direction with respect to a magneto-optical disk by a plurality of support shafts, and one or more driving forces are applied to the movable head to move the movable head. In the optical disc device that is moved to perform magneto-optical recording / reproduction with respect to the magneto-optical disc, the center of gravity of the movable head and a force point on which one driving force acts or two or more driving forces act on them. The optical disc device, wherein the force point on which the resultant force acts is in a range surrounded by the sizes of the plurality of support shafts. 【請求項２】 前記可動ヘッドの重心は、一の駆動力の
作用する力点又は二以上の駆動力が作用するときにはそ
れらの駆動力の合力の作用する力点に一致することを特
徴とする請求項１記載の光学式ディスク装置。2. The center of gravity of the movable head coincides with a force point on which one driving force acts or a force point on which a resultant force of the driving forces acts when two or more driving forces act. 1. The optical disc device according to 1. 【請求項３】 複数の支持軸により可動ヘッドを光磁気
ディスクに対して半径方向に移動自在に支持し、該可動
ヘッドに対して一又は二以上の駆動力を作用させること
により前記可動ヘッドを移動させ、前記光磁気ディスク
に対して光磁気記録再生を行う光学式ディスク装置にお
いて、前記可動ヘッドの重心及び光磁気ディスク面に直
交する方向の磁界により生成される一の駆動力の作用す
る力点又は前記磁界により生成される二以上の駆動力が
作用するときにはそれらの駆動力の合力の作用する力点
が前記複数の支持軸の大きさによって囲まれる範囲にあ
ることを特徴とする光学式ディスク装置。3. A movable head is supported by a plurality of support shafts so as to be movable in the radial direction with respect to the magneto-optical disk, and one or more driving forces are applied to the movable head to move the movable head. In an optical disk device that is moved to perform magneto-optical recording / reproduction with respect to the magneto-optical disk, a force point on which one driving force generated by a magnetic field in a direction orthogonal to the center of gravity of the movable head and the magneto-optical disk surface acts. Alternatively, when two or more driving forces generated by the magnetic field act, the force point where the resultant force of the driving forces acts is in a range surrounded by the sizes of the plurality of support shafts. ..
JP31226191A 1991-11-27 1991-11-27 Optical disk device Pending JPH05151636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31226191A JPH05151636A (en) 1991-11-27 1991-11-27 Optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31226191A JPH05151636A (en) 1991-11-27 1991-11-27 Optical disk device

Publications (1)

Publication Number Publication Date
JPH05151636A true JPH05151636A (en) 1993-06-18

Family

ID=18027112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31226191A Pending JPH05151636A (en) 1991-11-27 1991-11-27 Optical disk device

Country Status (1)

Country Link
JP (1) JPH05151636A (en)

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