JPS5968837A - Left/right/up/down shifter of objective lens for optical pickup device - Google Patents

Left/right/up/down shifter of objective lens for optical pickup device

Info

Publication number
JPS5968837A
JPS5968837A JP17700682A JP17700682A JPS5968837A JP S5968837 A JPS5968837 A JP S5968837A JP 17700682 A JP17700682 A JP 17700682A JP 17700682 A JP17700682 A JP 17700682A JP S5968837 A JPS5968837 A JP S5968837A
Authority
JP
Japan
Prior art keywords
jitter
control coil
objective lens
tracking
coil
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
JP17700682A
Other languages
Japanese (ja)
Inventor
Tsutomu Matsui
勉 松井
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.)
Akai Electric Co Ltd
Original Assignee
Akai Electric Co 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 Akai Electric Co Ltd filed Critical Akai Electric Co Ltd
Priority to JP17700682A priority Critical patent/JPS5968837A/en
Publication of JPS5968837A publication Critical patent/JPS5968837A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925Electromechanical actuators for lens positioning
    • G11B7/093Electromechanical actuators for lens positioning for focusing and tracking
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/081Disposition or mounting of heads or light sources relatively to record carriers for time base error correction by moving the light beam
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925Electromechanical actuators for lens positioning
    • G11B7/0932Details of sprung supports

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To miniaturize a titled device, by providing a circumferentially a focus and a tracking control coil orthogonally to an objective lens holder, fitting a jitter control coil to the side face of the focus control coil and supporting freely movably the lens holder with a tracking/jitter moving body. CONSTITUTION:The focus and the tracking control coils 13, 14 are arranged at right angles to the objective lens holder 11 in the same horizontal lines to reduce the height H2 in the Z axis. A jitter control coil 15 is fitted to an outer face 13C of the coil 13 and both of them are arranged in the same horizontal line to reduce the height H2 in the Z axis. A magnetic circuit 18 for jitter is formed with a pillar magnetic substance and a permanent magnet 18A. A focusing parallel plate spring 19 is provided at the up/down part of the holder 11 and the up/ down face of a tracking/jitter mobile body 20 to support freely movably the holder 11 in the Z axis. A tracking/jitter elastic support 21 is erected on the fitting piece of the mobile body 20 and a base 17A to support elastically the mobile body 20 freely movably in the X and Y direction.

Description

【発明の詳細な説明】 この発明は、光ピツクアップ装置の対物レンズ上下左右
前後移動装置に係り、特に、対物しンズが装着された対
物レンズホルダーおよび該対物レンズホルダーに突設さ
れたコイル支持片にフォーカス制御用コイルとトラッキ
ング制御用コイルをお互に直交する方向で周設するとと
もにフォーカス制御用コイルの1個面に、ジッター制御
用コイルを前記の両コイルと直交する方向で取り付け、
一対の角棒状のフォーカス・トラッキング兼用磁気回路
の空隙部に前記の両コイルを配置するとともに該ジッタ
ー制御用コイルの中空部にジッター用磁気回路の一部を
配置し、ディスクに対して平行に配置されたトラッキン
グ・ジッター移動体により、フォーカス用平行板バネ、
トラッキング・ジッター用弾性支持体を介して該対物レ
ンズホルダーを上下左右前後移動自在に支持する光ピツ
クアップ装置の対物レンズ上下左右前後移動装置に関す
る。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for moving an objective lens up, down, left, right, back and forth for an optical pickup device, and particularly relates to an objective lens holder on which an objective lens is attached and a coil support piece protruding from the objective lens holder. A focus control coil and a tracking control coil are arranged around the coil in a direction perpendicular to each other, and a jitter control coil is attached to one surface of the focus control coil in a direction perpendicular to both coils,
Both of the above-mentioned coils are placed in the gap between a pair of rectangular rod-shaped focus/tracking magnetic circuits, and a part of the jitter magnetic circuit is placed in the hollow part of the jitter control coil, parallel to the disk. The parallel plate spring for focusing,
The present invention relates to a device for moving an objective lens up, down, left, right, back and forth for an optical pickup device, which supports the objective lens holder via an elastic support for tracking jitter so as to be movable up, down, left, right, back and forth.

従来の光ピツクアップ装置におけるフォーカス・トラッ
キング・ジッター各制御の一例を第1図、第2図および
第3図に示すがフォーカス(Z軸)制御は対物レンズ1
が装着されたレンズ筒2の下部に配置されたフォーカス
駆動部F。
Examples of focus, tracking, and jitter control in a conventional optical pickup device are shown in FIGS. 1, 2, and 3. Focus (Z-axis) control is performed using the objective lens 1.
A focus drive section F is arranged at the bottom of the lens barrel 2 to which the lens barrel 2 is attached.

トラッキング(X軸)制御はレンズ筒2の上部に配置さ
れた一対のトラッキング駆動部T、ジッター(Y軸)制
御はレンズ筒2の上部にトラッキング駆動部Tと直交し
て配置された一対のジッター、駆動部Jにより行ってお
り、その駆動対象はレンズ筒2ひいては対物レンズ1で
ある。
Tracking (X-axis) control is performed by a pair of tracking drive units T placed at the top of the lens barrel 2, and jitter (Y-axis) control is performed by a pair of jitter units placed at right angles to the tracking drive unit T at the top of the lens barrel 2. , by a driving section J, and the object to be driven is the lens barrel 2 and, in turn, the objective lens 1.

そうして、フォーカス駆動部Fは、管フランジ状の磁性
体IF、磁性体1Fの水平外周部に固定された円筒状の
永久磁石2Fおよび永久磁石2Fの上面に固定された円
筒状の磁性体6Fから形成されかつ収納筒3に固定され
た磁気回路と、磁気回路に形成された空隙部4Fに配置
されかつレンズ筒2に突出周設された円形コイル5Fと
から構成されている。
The focus drive unit F includes a tube flange-shaped magnetic body IF, a cylindrical permanent magnet 2F fixed to the horizontal outer circumference of the magnetic body 1F, and a cylindrical magnetic body fixed to the upper surface of the permanent magnet 2F. 6F and fixed to the housing tube 3, and a circular coil 5F disposed in a gap 4F formed in the magnetic circuit and projecting from the lens tube 2.

まだ、トラッキング駆動部F、ジッター駆動部Jはいず
れも2個の永久磁石A、2個の永久磁石AのS極間に挟
着された磁性体Bおよび2個の永久磁石・AのN極側に
固着された磁性体Cから形成されかつ収納筒6に固定さ
れた磁気回路と、磁性体Bと磁性体Cの間に形成された
空隙部りに配置されかつ一端部がレンズ筒2に固着され
た角形コイルEとから構成されている。
Both the tracking drive unit F and the jitter drive unit J are composed of two permanent magnets A, a magnetic body B sandwiched between the S poles of the two permanent magnets A, and the N pole of the two permanent magnets A. A magnetic circuit formed from a magnetic body C fixed to the side and fixed to the housing tube 6, and a magnetic circuit arranged in the gap formed between the magnetic body B and the magnetic body C and whose one end is connected to the lens tube 2. It consists of a square coil E that is fixed.

さらに、レンズ筒2は、収納筒6との間に設けられたレ
ンズ筒弾性支持体4によってZ軸方向自在に移動し、X
軸・Y軸方向に傾斜する。
Furthermore, the lens barrel 2 is freely movable in the Z-axis direction by a lens barrel elastic support 4 provided between it and the housing barrel 6, and
Tilt in the axis/Y-axis direction.

この従来技術においては、ディスクDに対してフォーカ
ス駆動部Fとトラッキング駆動部T。
In this prior art, a focus drive section F and a tracking drive section T are provided for the disk D.

ジッター駆動部、■とが垂直2段に配置されているので
、光ピツクアップ装置のZ軸方向の高さHlは大きく、
そのため、光ピツクアップ装置の薄形化の障害になると
いう問題点があった。
Since the jitter drive unit and () are arranged in two vertical stages, the height Hl of the optical pickup device in the Z-axis direction is large.
Therefore, there is a problem in that it becomes an obstacle to making the optical pickup device thinner.

この発明は、このような従来技術の問題点に着目してな
されたもので、対物レンズが装着された対物レンズホル
ダーおよび該対物レンズホルダーに突設されたコイル支
持片に、フォーカス制御用コイルとトラッキング制御用
コイルをお互に直交する方向で周設するとともに、フォ
ーカス制御用コイルの一側面にジッター制御用コイルを
前記の両コイルと直交する方向で取り付ケ、一対の角棒
状のフォーカス・トラッキング兼用磁気回路の空隙部に
前記の両コイルを配置するとともに、該ジッター制御用
コイルの中空部にジッター用磁気回路の一部を配置し、
ディスクに対して平行に配置されたトラッキング・ジッ
ター移動体により、フォーカス用平行板ノ々ネ、トラッ
キング・ジッター用弾性支持体を介して該対物レンズホ
ルダーを上下左右前後移動自在に支持することによって
、上記問題点を解決することを目的としている。
The present invention was made by focusing on the problems of the prior art, and includes a focus control coil and a coil support piece protruding from the objective lens holder to which the objective lens is mounted and the coil support piece protruding from the objective lens holder. Tracking control coils are arranged around the coils in directions perpendicular to each other, and a jitter control coil is attached to one side of the focus control coil in a direction perpendicular to both coils. Both of the coils are placed in the gap of the tracking magnetic circuit, and a part of the jitter magnetic circuit is placed in the hollow part of the jitter control coil.
By supporting the objective lens holder so as to be movable up, down, left, right, front and back, via a parallel plate for focusing and an elastic support for tracking and jitter, by a tracking/jitter moving body arranged parallel to the disk. The purpose is to solve the above problems.

以下、この発明を図面に基づいて説明する。The present invention will be explained below based on the drawings.

第4図、第5図、第6図および第7図は、この発明の一
実施例を示す図である。
FIG. 4, FIG. 5, FIG. 6, and FIG. 7 are diagrams showing an embodiment of the present invention.

まず構成を説明すると、11は対物レンズホルダーで、
縦方向に円孔11八′が穿設され、円孔11八′に対物
レンズ1が装着されている。
First, to explain the configuration, 11 is an objective lens holder.
A circular hole 118' is bored in the vertical direction, and the objective lens 1 is mounted in the circular hole 118'.

12はコイル支持片で、対物レンズホルダー11の一側
面11Aに突設されている。コイル支持片12の高さI
(2’は対物レンズホルダー11の高さ■]′1よシ低
く定める。
Reference numeral 12 denotes a coil support piece, which is protruded from one side surface 11A of the objective lens holder 11. Height I of coil support piece 12
(2' is the height of the objective lens holder 11) Set lower than '1.

16は角形のフォーカス制御用コイルで、−側面11A
と平行する対物レンズホルダー11の平行側面11Bと
一側面11Aと平行するコイル支持片12の側面12A
に、平行側面11 B(または−側面11A)と直交す
る対物レンズホルダー11の両直交側面110,11D
と一定の間隙Gをもって、周設されている。フォーカス
制御用コイル13の高さ■(、はコイル支持片12の高
さH4より低く定める。
16 is a rectangular focus control coil, - side 11A
A side surface 12A of the coil support piece 12 parallel to the parallel side surface 11B of the objective lens holder 11 and one side surface 11A.
, both orthogonal side surfaces 110 and 11D of the objective lens holder 11 are perpendicular to the parallel side surface 11B (or - side surface 11A).
It is provided around the circumference with a constant gap G. The height () of the focus control coil 13 is set lower than the height H4 of the coil support piece 12.

14は角形のトラッキング制御用コイルで、その高さI
(4、幅W4はフォーカス制御用コイル16の高さ■(
3,幅W3より大きく、フォーカス制御用コイル16に
外嵌してコイル支持片12の上下面12B 、 120
に周設され、フォーカス制御用コイル16と直交してい
る。対物レンズホルダー11およびコイル支持片12に
フォーカス制御用コイル13とトラッキング制御用コイ
ル14をお互に直交する方向で周設することで、フォー
カス制御用コイル13とトラッキング制御用コイル14
は同一水平線上に配列されるので、光ピツクアップ装置
のZ軸方向の高さ■−12は小さくなり光ピツクアップ
装置の薄形化が計れる。
14 is a rectangular tracking control coil whose height is I.
(4. The width W4 is the height of the focus control coil 16 (
3. Larger than the width W3 and fitted onto the focus control coil 16 to form the upper and lower surfaces 12B of the coil support piece 12, 120
The focus control coil 16 is disposed around the focus control coil 16 and is perpendicular to the focus control coil 16. By disposing the focus control coil 13 and the tracking control coil 14 around the objective lens holder 11 and the coil support piece 12 in mutually orthogonal directions, the focus control coil 13 and the tracking control coil 14
are arranged on the same horizontal line, the height (12) of the optical pickup device in the Z-axis direction becomes small, and the optical pickup device can be made thinner.

15は角形のジッター制御用コイルで、その−側面は平
行側面11B側のフォーカス制御用コイル16の外面1
30の長手方向に取り付けられ、フォーカス制御用コイ
ル13およびトラッキング制御用コイル14と直交して
いる。フォーカス制御用コイル16の外面130にジッ
ター制御用コイル15を取り付けることで、フォーカス
制御用コイル13とジッター制御用コイル15は同一水
平線上に配列されるので、光ピツクアップ装置のZ軸方
向の高さ1−12は小さくなり、光ピツクアップ装置の
薄形化が計れる。
15 is a rectangular jitter control coil, the negative side of which is the outer surface 1 of the focus control coil 16 on the parallel side 11B side.
30 in the longitudinal direction, and is orthogonal to the focus control coil 13 and the tracking control coil 14. By attaching the jitter control coil 15 to the outer surface 130 of the focus control coil 16, the focus control coil 13 and the jitter control coil 15 are arranged on the same horizontal line, so that the height of the optical pickup device in the Z-axis direction can be reduced. 1-12 becomes smaller, and the optical pickup device can be made thinner.

16はフォーカス・トラッキング兼用磁気回路で、一対
の角棒形状である。フォーカス・トラッキング兼用磁気
回路16は、縦断面凹字状の磁性体と横断面長方形の永
久磁石16Aとから形成されている。磁性体の対向−辺
16Bの内側には永久磁石16Aが長手方向に亘って取
り付けられており、永久磁石16Aと磁性体の7一 対向他辺160の間にはフォーカス制御用コイル13お
よびトラッキング制御用コイル14を配置できかつ対物
レンズホルダー11がY軸方向に移動できる大きさくJ
−±1關)の空隙部16Dが形成されている。離隔距離
jをこのように定めることによって、ジッター制御用コ
イル15に過電流が流れても、空隙部16Dに配置され
るフォーカス制御用コイル16またはトラッキング制御
用コイル14と対向他辺1.!Set、たけ永久磁石1
6Aとの接触によりジッター制御用コイル15が1覇以
上動かず、サーゼを復帰させる際にこれらのコイル13
.14がストツノξ−を兼ねるので、別にストッパーを
設ける必要はない。まだ、対向他辺160の下部にはト
ラッキング制御用コイル14を空隙部16Dに配置でき
るようトラッキング制御用コイル14の奥行D4より大
きい切欠部16Bが形成されている。対向他辺16Cの
幅W6は間隙Gの大きさより当然に小さく、その長さL
6はフォーカス制御用コイル16の内側長さL3よシ短
く、対向他辺8− 16Cの端部とフォーカス制御用コイル16の内側との
離隔距離1は約03胴にする。まだ下部に切欠部16E
を有する対向他辺160の上面(または下面)とトラッ
キング制御用コイル14の内側との離隔距離fは約1咽
にする。離隔距離t、fをこのように定めることによっ
て、トラッキング制御用コイル14またはフォーカス制
御用コイル13に過電流が流れても、フォーカス制御用
コイル16と対向他辺160の端部が接触し、まだは対
向他辺160の上面(または下面)とトラッキング制御
用コイル14が接触し、トラッキング制御用コイル14
が0.3mm以上、フォーカス制御用コイル16が1燗
以上動かず、サーゼを復帰させる際にこれらのコイル1
3.14がストン、o−を兼ねるので、別にストン・々
−を設ける必要はない。
Reference numeral 16 denotes a magnetic circuit for both focus and tracking, which is shaped like a pair of square rods. The focus/tracking magnetic circuit 16 is formed of a magnetic material having a concave vertical section and a permanent magnet 16A having a rectangular cross section. A permanent magnet 16A is attached in the longitudinal direction inside the opposite side 16B of the magnetic body, and a focus control coil 13 and a tracking control coil 13 are installed between the permanent magnet 16A and the other opposite side 160 of the magnetic body 71. J is large enough to allow the placement of the coil 14 and the movement of the objective lens holder 11 in the Y-axis direction.
A gap 16D of -±1 angle) is formed. By determining the separation distance j in this way, even if an overcurrent flows through the jitter control coil 15, the other side 1. ! Set, Take permanent magnet 1
The jitter control coils 15 do not move more than 1 time due to contact with 6A, and these coils 13
.. 14 also serves as the stopper ξ-, so there is no need to provide a separate stopper. Still, a notch 16B larger than the depth D4 of the tracking control coil 14 is formed in the lower part of the other opposing side 160 so that the tracking control coil 14 can be placed in the gap 16D. The width W6 of the other opposing side 16C is naturally smaller than the size of the gap G, and its length L
6 is shorter than the inner length L3 of the focus control coil 16, and the distance 1 between the end of the other opposing side 8-16C and the inner side of the focus control coil 16 is approximately 0.3 mm. There is still a notch 16E at the bottom.
The separation distance f between the upper surface (or lower surface) of the other opposing side 160 and the inside of the tracking control coil 14 is approximately one inch. By determining the separation distances t and f in this manner, even if an overcurrent flows through the tracking control coil 14 or the focus control coil 13, the end of the focus control coil 16 and the other opposing side 160 will come into contact with each other, and the end of the opposite side 160 will still be in contact with the coil 16 for focus control. The tracking control coil 14 contacts the top surface (or bottom surface) of the other opposing side 160, and the tracking control coil 14
is 0.3 mm or more, the focus control coil 16 does not move for more than 1 hour, and these coils 1
3.14 also serves as a stone and an o-, so there is no need to provide a separate stone.

7オーカス・トラッキング兼用磁気回路16は、その長
手方向がトラッキング移動方向(X軸方向)と平行に配
置され、光ピックアツプノ1ウジング17のベース17
Aに固定されている。
7 The orcus/tracking magnetic circuit 16 is arranged so that its longitudinal direction is parallel to the tracking movement direction (X-axis direction), and
It is fixed at A.

空隙部16Dに平行側面11Bと直行するフォーカス制
御用コイル16の直交部分16A。
A portion 16A of the focus control coil 16 is orthogonal to the side surface 11B parallel to the cavity 16D.

13Bおよびトラッキング制御用コイル14の一部が配
置されている。
13B and a part of the tracking control coil 14 are arranged.

フォーカス用、トラッキング用と別々の磁気回路を使用
していたものが、一対のフォーカス・トラッキング兼用
磁気回路16で済むため、部品コスト、組立コストを低
減できる。
Instead of using separate magnetic circuits for focusing and tracking, a pair of focus/tracking magnetic circuits 16 can be used, so parts costs and assembly costs can be reduced.

18はジッター用磁気回路で横断面中空四角柱状の磁性
体と横断面長方形の永久磁石18Aとから形成されてい
る。磁性体の対向−辺18Bの内側には縦方向に永久磁
石18Aが取り付けられており、永久磁石18Aと対向
他辺180との間にはジッター制御用コイル15が配置
できるよう間隙が設けられている。対向他辺180の長
さL8はジッター制御用コイル15の長さL5よシ大き
く、対向他辺18Cはジッター制御用コイル15の中空
部に配置されている。ジッター用磁気回路18は、その
長手方向がジッター移動方向(Y軸方向)と平行に配置
され、光ピツクアップハウジング17のジッター移動方
向(Y軸方向)と平行な側壁17Bに固定されている。
Reference numeral 18 denotes a magnetic circuit for jitter, which is formed from a magnetic material having a hollow square columnar cross section and a permanent magnet 18A having a rectangular cross section. A permanent magnet 18A is attached vertically inside the opposing side 18B of the magnetic material, and a gap is provided between the permanent magnet 18A and the other opposing side 180 so that the jitter control coil 15 can be arranged. There is. The length L8 of the other opposing side 180 is greater than the length L5 of the jitter control coil 15, and the other opposing side 18C is arranged in the hollow part of the jitter control coil 15. The jitter magnetic circuit 18 is arranged with its longitudinal direction parallel to the jitter movement direction (Y-axis direction), and is fixed to a side wall 17B of the optical pickup housing 17 parallel to the jitter movement direction (Y-axis direction).

19はフォーカス用平行板ノ々ネで対物レンズホルダー
11の一側面11Aの上下部とトラッキング・ジッター
移動体20の外側端部20Aの上下面に架設され、対物
レンズホルダー11を外側端部20Aからフォーカス移
動方向(Z軸方向)へ移動自在に弾性支持する。
Reference numeral 19 denotes a parallel plate for focusing, which is installed between the upper and lower parts of one side 11A of the objective lens holder 11 and the upper and lower surfaces of the outer end 20A of the tracking jitter moving body 20, and is connected to the objective lens holder 11 from the outer end 20A. It is elastically supported to be movable in the focus movement direction (Z-axis direction).

トラッキング・ジッター移動体20は、対物レンズホル
ダー11の高さIr1よりやや低い高さを有する外側端
部20Aと、外側端部20A−の中央部から対物レンズ
ホルダー11側へ突出されかつ外側端部2OAの高さI
]2o より低い高さを有するとともに平面形状逆T字
状の横片20Bと、横片20I3の先端部両側面に突設
された正面形状および左側面形状逆り字状のトラッキン
グ・ジッター用弾性支持体取付片200とから形成され
ており、横片20Bには縦方向に重量軽減用の透孔20
Dが穿設され、外側端部20Aの上部外側面にはトラッ
キング・ジッター用弾性支持体取付片20Eが突設され
ている。
The tracking jitter moving body 20 has an outer end 20A having a height slightly lower than the height Ir1 of the objective lens holder 11, and an outer end that protrudes toward the objective lens holder 11 from the center of the outer end 20A-. 2OA height I
]2o A horizontal piece 20B having a lower height and an inverted T-shape in plan view, and an elastic member for tracking jitter having an inverted-shaped front and left side surface protruding from both sides of the tip of the horizontal piece 20I3. The horizontal piece 20B has a through hole 20 for weight reduction in the vertical direction.
D is bored, and a tracking jitter elastic support mounting piece 20E is provided protruding from the upper outer surface of the outer end 20A.

フォーカス用平行板ノ々ネ19およびトラッキング・ジ
ッター移動体20はディスクDに対して平行である。
The parallel plate nozzle 19 for focusing and the tracking jitter moving body 20 are parallel to the disk D.

21はトラッキング・ジッター用弾性支持体で、その高
さは外側端部20Aの高さH2oより大きり、トラッキ
ング・ジッター移動体20のトラッキング・ジッター用
弾性支持体取付片200.20Bと光ピツクアップハウ
ジング17のベース17Aに立設され、トラッキング・
ジッター移動体20をベース17Aからトラッキング移
動方向(X軸方向)およびジッター移動方向(Y軸方向
)へ移動自在に弾性支持する。
Reference numeral 21 denotes an elastic support for tracking jitter, the height of which is greater than the height H2o of the outer end 20A, and is connected to the elastic support mounting piece 200.20B for tracking jitter of the tracking jitter moving body 20 and the optical pickup. It is installed upright on the base 17A of the housing 17, and the tracking
The jitter moving body 20 is elastically supported from the base 17A so as to be movable in the tracking movement direction (X-axis direction) and the jitter movement direction (Y-axis direction).

トラッキング・ジッター用弾性支持体21として丸棒の
ゴムが用いられ、一端はトラッキング・ジッター用弾性
支持体取付片200.20Eに穿設されだ円孔に嵌合さ
れ、他端はベース17Aに固定された円筒片21Aに嵌
合されている。
A round rubber bar is used as the tracking jitter elastic support 21, one end of which is bored into the tracking jitter elastic support mounting piece 200.20E and fitted into an oval hole, and the other end is fixed to the base 17A. It is fitted into the cylindrical piece 21A.

次に作用を説明する。フォーカス誤差信号。Next, the effect will be explained. Focus error signal.

トラッキング誤差信号まだはジッター誤差信号がゼロで
あるときは、フォーカス制御用コイル13、トラッキン
グ制御用コイル14まだはジッター制御用コイル15に
は電流が流れず対物レンズホルダー11は所定の位置に
静止している。いまフォーカス誤差信号があるとフォー
カス制御用コイル13に電流が流れる。この電流の方向
とフォーカス・トラッキング兼用磁気回路16の磁束の
方向は直交しているから、フレミングの左手の法則に基
づいてフォーカス制御用コイル16は上下方向(Z軸方
向)に力を受ける。そうして、フォーカス制御用コイル
13は対物レンズホルダー11と一体となり、フオ  
 ′−カス用平行板ノクネ19によって弾性支持されて
いるから、」−下方向(Z軸方向)に移動する。
When the tracking error signal is still zero and the jitter error signal is zero, no current flows through the focus control coil 13, tracking control coil 14 or jitter control coil 15, and the objective lens holder 11 remains stationary at a predetermined position. ing. If there is a focus error signal now, a current flows through the focus control coil 13. Since the direction of this current and the direction of the magnetic flux of the focus/tracking magnetic circuit 16 are perpendicular to each other, the focus control coil 16 receives a force in the vertical direction (Z-axis direction) based on Fleming's left hand rule. Then, the focus control coil 13 is integrated with the objective lens holder 11, and the focus control coil 13 is integrated with the objective lens holder 11.
Since it is elastically supported by the parallel plate nokune 19 for waste, it moves downward (Z-axis direction).

したがって、フォーカス制御用コイル16と対物レンズ
ホルダー11を介して一体となっている対物レンズ1も
上下方向(Z軸方向)に移動する。なお、移動方向およ
び移動量はフォーカス制御用コイル13に流れる電流の
方向および大きさによって定まる。
Therefore, the objective lens 1, which is integrated with the focus control coil 16 through the objective lens holder 11, also moves in the vertical direction (Z-axis direction). Note that the direction and amount of movement are determined by the direction and magnitude of the current flowing through the focus control coil 13.

次にトラッキング誤差信号があるとトラッキング制御用
コイル14に電流が流れる。この電流の方向とフォーカ
ス・トラッキング兼用磁気回路16の磁束の方向は直交
しているから、フレミングの左手の法則に基づいてトラ
ッキング制御用コイル14は左右方向(X軸方向)に力
を受ける。そうして、トラッキング制御用コイル14は
対物レンズホルダー11と一体となり、フォーカス用平
行板バネ19を介してトラッキング・ジッター移動体2
0に取り付けられているトラッキング・ジッター用弾性
支持体21によって左右方向(X軸方向)に関し弾性支
持されているから、左右方向(X軸方向)に移動する。
Next, when there is a tracking error signal, a current flows through the tracking control coil 14. Since the direction of this current and the direction of the magnetic flux of the focus/tracking magnetic circuit 16 are perpendicular to each other, the tracking control coil 14 receives a force in the left-right direction (X-axis direction) based on Fleming's left-hand rule. Then, the tracking control coil 14 is integrated with the objective lens holder 11, and the tracking jitter moving body 2 is connected via the parallel plate spring 19 for focusing.
Since it is elastically supported in the left-right direction (X-axis direction) by the elastic support body 21 for tracking jitter attached to 0, it moves in the left-right direction (X-axis direction).

しだがって、トラッキング制御用コイル14とコイル支
持片12.対物レンズホルダー11を介して一体となっ
ている対物レンズ1も左右方向(X軸方向)に移動する
。なお、移動方向および移動量はトラッキング制御用コ
イル14に流れる電流の方向および大きさによって定ま
る。
Therefore, the tracking control coil 14 and the coil support piece 12. The objective lens 1 integrated with the objective lens holder 11 also moves in the left-right direction (X-axis direction). Note that the direction and amount of movement are determined by the direction and magnitude of the current flowing through the tracking control coil 14.

次にジッター誤差信号があるとジッター制御用コイル1
5に電流が流れる。この電流の方向とジッター用磁気回
路18の磁束の方向は直交しているから、フレミングの
左手の法則に基づいてジッター制御用コイル15は前後
方向(Y軸方向)に力を受ける。そうして、ジッター制
御用コイル15は対物レンズホルダー11と一体となり
、フォーカス用平行板バネ19を介してトラッキング・
ジッター移動体20に取り付けられているトラッキング
・ジッター用弾性支持体21によって前後方向(Y軸方
向)に関し弾性支持されているから、前後方向(Y軸方
向)に移動する。したがって、ジッター制御用コイル1
5とフォーカス制御用コイル16.対物レンズホルダー
11を介して一体となっている対物レンズ1も前後方向
(Y軸方向)に移動する。
Next, when there is a jitter error signal, the jitter control coil 1
A current flows through 5. Since the direction of this current and the direction of the magnetic flux of the jitter magnetic circuit 18 are perpendicular to each other, the jitter control coil 15 receives a force in the front-rear direction (Y-axis direction) based on Fleming's left-hand rule. In this way, the jitter control coil 15 is integrated with the objective lens holder 11, and the tracking/jitter control coil 15 is integrated with the objective lens holder 11, and the tracking
Since it is elastically supported in the front-rear direction (Y-axis direction) by the tracking jitter elastic support body 21 attached to the jitter moving body 20, it moves in the front-rear direction (Y-axis direction). Therefore, jitter control coil 1
5 and a focus control coil 16. The objective lens 1 integrated with the objective lens holder 11 also moves in the front-rear direction (Y-axis direction).

なお、移動方向および移動量はジッター制御用コイル1
5に流れる電流の方向および大きさによって定まる。
Note that the direction and amount of movement are determined by the jitter control coil 1.
It is determined by the direction and magnitude of the current flowing through 5.

一15= なお、フォーカス誤差信号、トラッキング誤差信号およ
びジッター誤差信号は、第6図に示すように半導体V−
ザ60のレーザ光を偏光ビームスプリッタ61.コリメ
ータレンズ32゜1/4 波長板33 、90°偏向ミ
ラー34.対物レンズ1に導き、ディスクDからの反射
光を逆の順序で偏光ビームスプリッタ31まで戻し、9
0°偏向させ、図示し々い遮光板を経て4分割光センサ
に導いて得ている。
-15= Note that the focus error signal, tracking error signal, and jitter error signal are generated by the semiconductor V-
The laser beam from the laser 60 is transmitted to the polarizing beam splitter 61. Collimator lens 32°1/4 Wave plate 33, 90° deflection mirror 34. The reflected light from the disk D is returned to the polarizing beam splitter 31 in the reverse order, and
It is obtained by deflecting the light by 0° and guiding it to a 4-split optical sensor through various light shielding plates (not shown).

以上説明してきたように、この発明は、対物し/ズが装
着された対物レンズホルダーおよび該対物レンズホルダ
ーに突設されたコイル支持片にフォーカス制御用コイル
とトラッキング制御用コイルをお互に直交する方向で周
設するとともにフォーカス制御用コイルの一側面にジッ
ター制御用コイルを前記の両コイルと直交する方向で取
り付け、一対の角棒状のフォーカス・トラッキング兼用
磁気回路の空隙部に前記の両コイルを配置するとともに
該ジッター制御用コイルの中空部に・ジッター用磁気回
路の一部を配16− 置し、ディスクに対して平行に配置されたトラッキング
・ジッター移動体によシ、フォーカス相平行板ノ々ネ、
トラッキング・ジッター用弾性支持体を介して該対物レ
ンズホルダーを上下左右前後移動自在に支持することに
よって、光♂ツクアンプ装置の薄形化、軽量化、W価低
減化を計ることができるという効果が得られる。
As explained above, the present invention provides a focus control coil and a tracking control coil arranged orthogonally to each other on an objective lens holder to which an objective lens is attached and a coil support piece protruding from the objective lens holder. At the same time, a jitter control coil is attached to one side of the focus control coil in a direction perpendicular to both coils, and both coils are installed in the gap between a pair of rectangular rod-shaped focus/tracking magnetic circuits. At the same time, a part of the magnetic circuit for jitter is placed in the hollow part of the jitter control coil, and a focus phase parallel plate is placed by the tracking jitter moving body placed parallel to the disk. Nonone,
By supporting the objective lens holder so as to be movable up, down, left, right, front and back through an elastic support for tracking jitter, the optical amplifier device can be made thinner, lighter, and have a lower W number. can get.

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

第1図は従来技術の要部斜視図、第2図はフォーカス駆
動部Fの断面図、第3図はトラッキング駆動部T、ジッ
ター駆動部Jの分解斜視図、第4図はこの発明の一実施
例を示す分解斜視図、第5図はこの発明の一実施例を示
す平面図、第6図は光学系を含めた第5図のA−A断面
図、第7図は第5図のB−B断面図である。 1・・・対物レンズ、2・・・レンズ筒、6・・・収納
筒、4・・・レンズ筒弾性支持体、11・・・対物レン
ズホル$−112・・・コイル支持片、16・・・フォ
ーカス制御用コイル、14・・・トラッキング制御用コ
イル、15・・・ジッター制御用コイル、16・・・フ
オーカス・トラッキング兼用磁気回路、17・・・光ピ
ツクアップハウジング、18・・・ジッター用磁気回路
、19・・・フォーカス用平行板バネ、2゜・・・トラ
ッキング・ジッター移動体、21・・・トラッキング・
ジッター用弾性支持体。 19−
FIG. 1 is a perspective view of the main parts of the prior art, FIG. 2 is a sectional view of the focus drive section F, FIG. 3 is an exploded perspective view of the tracking drive section T and jitter drive section J, and FIG. 4 is a perspective view of the main part of the present invention. FIG. 5 is an exploded perspective view showing an embodiment of the present invention, FIG. 5 is a plan view showing an embodiment of the present invention, FIG. 6 is a sectional view taken along line AA in FIG. 5 including the optical system, and FIG. It is a BB sectional view. DESCRIPTION OF SYMBOLS 1... Objective lens, 2... Lens tube, 6... Storage tube, 4... Lens tube elastic supporter, 11... Objective lens holder $-112... Coil support piece, 16... - Focus control coil, 14... Tracking control coil, 15... Jitter control coil, 16... Focus/tracking combined magnetic circuit, 17... Optical pickup housing, 18... Jitter use Magnetic circuit, 19... Parallel plate spring for focusing, 2°... Tracking jitter moving body, 21... Tracking
Elastic support for jitter. 19-

Claims (1)

【特許請求の範囲】 1、対物レンズが装着された対物レンズホルダーの一側
面にコイル支持片を突設し、該−側面と平行する該対物
レンズホルダーの平行側面と該平行側面と平行する該コ
イル支持片の側面に角形のフォーカス制御用コイルを該
平行側面と直交する該対物レンズホルダーの両直交側面
と間隙をもって周設するとともに、該フォーカス制御用
コイルに外嵌して該コイル支持片の上下面にトラッキン
グ制御用コイルを周設し、かつ、該平行側面側の該フォ
ーカス制御用コイルの外面長手方向に角形のジッター制
御用コイルの一側面を取り付け、縦断面凹字状の磁性体
の対向−辺の内側に長手方向に亘って永久磁石が取り付
けられているとともに対向他辺の下部に該トラッキング
制御用コイルの奥行より大きい切欠1一 部が形成されかつ光ピツクアップハウジングに固定され
た一対の磁気回路の空隙部に該平行側面と直交する該フ
ォーカス制御用コイルの直交部分および該トラッキング
制御用コイルの一部を配置するとともに、該ジッター制
御用コイルの中空部に横断面中空四角柱状の磁性体の対
向−辺に縦方向に永久磁石が取り付けられているととも
に光ピツクアップハウジングに固定された磁気回路の対
向他辺を配置し、該対物レンズホルダーの該−側面の上
下部と該トラッキング制御用コイル側に配置されたトラ
ッキング・ジッター移動体の外側端部の」二下面にフォ
ーカス相平行板ノ々ネを架設し、該トラッキング・、ジ
ッター移動体と光ピツクアップハウジングのペースにト
ラッキング・ジッター用弾性支持体を立設してなる光ピ
ツクアップ装置の対物レンズ」二下左右前後移動装置
[Claims] 1. A coil support piece is provided protruding from one side of the objective lens holder on which the objective lens is attached, and a coil support piece is provided protrudingly from one side of the objective lens holder, and a coil support piece is provided that protrudes from one side of the objective lens holder, and a coil support piece is provided that is parallel to the parallel side of the objective lens holder, and a coil support piece is provided that is parallel to the parallel side of the objective lens holder. A rectangular focus control coil is provided around the side surface of the coil support piece with a gap between both orthogonal side surfaces of the objective lens holder that are perpendicular to the parallel side surfaces, and is fitted around the focus control coil to form a coil support piece. Tracking control coils are provided on the upper and lower surfaces, and one side of a rectangular jitter control coil is attached in the longitudinal direction of the outer surface of the focus control coil on the parallel side, and a magnetic body with a concave longitudinal section is attached. A permanent magnet is attached to the inside of the opposing side in the longitudinal direction, and a part of the notch 1 larger than the depth of the tracking control coil is formed at the bottom of the other opposing side, and is fixed to the optical pickup housing. An orthogonal part of the focus control coil and a part of the tracking control coil, which are orthogonal to the parallel side surfaces, are arranged in the gap between the pair of magnetic circuits, and a hollow part of the jitter control coil has a hollow quadrangular cross section. A permanent magnet is attached vertically to the opposite side of the magnetic body, and the opposite side of the magnetic circuit fixed to the optical pickup housing is arranged, and the upper and lower parts of the side of the objective lens holder and the opposite side are arranged. A focus phase parallel plate is installed on the lower surface of the outer end of the tracking/jitter moving body placed on the side of the tracking control coil to track the pace of the tracking/jitter moving body and the optical pickup housing.・Objective lens of an optical pickup device with an upright elastic support for jitter.
JP17700682A 1982-10-09 1982-10-09 Left/right/up/down shifter of objective lens for optical pickup device Pending JPS5968837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17700682A JPS5968837A (en) 1982-10-09 1982-10-09 Left/right/up/down shifter of objective lens for optical pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17700682A JPS5968837A (en) 1982-10-09 1982-10-09 Left/right/up/down shifter of objective lens for optical pickup device

Publications (1)

Publication Number Publication Date
JPS5968837A true JPS5968837A (en) 1984-04-18

Family

ID=16023515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17700682A Pending JPS5968837A (en) 1982-10-09 1982-10-09 Left/right/up/down shifter of objective lens for optical pickup device

Country Status (1)

Country Link
JP (1) JPS5968837A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6198227U (en) * 1984-11-30 1986-06-24

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5771532A (en) * 1980-10-22 1982-05-04 Matsushita Electric Ind Co Ltd Two axia driver
JPS57127934A (en) * 1981-01-30 1982-08-09 Hitachi Ltd Supporter for electromechanical converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5771532A (en) * 1980-10-22 1982-05-04 Matsushita Electric Ind Co Ltd Two axia driver
JPS57127934A (en) * 1981-01-30 1982-08-09 Hitachi Ltd Supporter for electromechanical converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6198227U (en) * 1984-11-30 1986-06-24
JPH0333936Y2 (en) * 1984-11-30 1991-07-18

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