JPS59221839A - Object lens holding device of optical disc player - Google Patents
Object lens holding device of optical disc playerInfo
- Publication number
- JPS59221839A JPS59221839A JP9711283A JP9711283A JPS59221839A JP S59221839 A JPS59221839 A JP S59221839A JP 9711283 A JP9711283 A JP 9711283A JP 9711283 A JP9711283 A JP 9711283A JP S59221839 A JPS59221839 A JP S59221839A
- Authority
- JP
- Japan
- Prior art keywords
- holder
- objective lens
- base
- holding device
- metal wire
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition 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
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0932—Details of sprung supports
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition 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
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0933—Details of stationary parts
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ディスク状の記録媒体に光スポ・ノドを投影
して光学的に情報を読み取る光ティヌクプレーヤの対物
レンズ保持装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an objective lens holding device for an optical tinook player that projects an optical beam onto a disk-shaped recording medium to optically read information.
従来例の構成とその問題点
一般にこの種の光デイスクプレーヤにおいて、正確に情
報を読み取るためには、ディスクのソリや振れに対して
対物レンズと情報トラック位置との距離を制御するフォ
ーカス制御と、情報トラックの偏心に対して対物レンズ
を追従制御するトラッキング制御を行なう必要があり、
そのためにフォーカス方向・トラッキング方向に自在に
動くように対物レンズを保持する必要がある０従来は対
物レンズに別々の板バネで保持し、との板バネのたわみ
によって対物レンズをフォーカス方向・トラッキング方
向に動かすようにしていた。このため機構が複雑でコス
ト高になり、しかも有害な部分共振を発生し易いという
欠点があった。すなわち、フォーカス方向の板バネがフ
ォーカス方向にたわむときに、トラッキング方向の板バ
ネにもフォーカス方向の応力が発生するため、その分だ
け部分共振が発生するという欠点があった。Conventional configurations and their problems In general, in this type of optical disk player, in order to read information accurately, focus control is required to control the distance between the objective lens and the information track position to prevent warping or wobbling of the disk. It is necessary to perform tracking control to control the objective lens to follow the eccentricity of the information track.
Therefore, it is necessary to hold the objective lens so that it can move freely in the focus direction and tracking direction. Conventionally, the objective lens is held with separate leaf springs, and the deflection of the leaf springs moves the objective lens in the focus direction and tracking direction. I was trying to move it to For this reason, the mechanism is complicated and costly, and harmful partial resonance is likely to occur. That is, when the leaf spring in the focus direction is deflected in the focus direction, stress in the focus direction is also generated in the leaf spring in the tracking direction, resulting in a drawback that partial resonance occurs accordingly.
発明の目的
本発明はこのような従来の欠点を解決するもので、コヌ
トが安く、有害な部分共振の少ない対物レンズ保持装置
を提供することを目的としている。OBJECTS OF THE INVENTION The present invention solves these conventional drawbacks and aims to provide an objective lens holding device that is inexpensive and produces fewer harmful partial resonances.
発明の構成
本発明は対物レンズを固着するホルダーと、基台と、ホ
ルダー及び基台にそれぞれの両端が固着された互に平行
な４本以上の金属線を備えた対物レンズ保持装置であわ
、上記金属線により、基台に対してホルダーをフォーカ
ス方向・トラッキン（グ方向の両方向に弾性的に保持す
るものである。Structure of the Invention The present invention is an objective lens holding device comprising a holder for fixing an objective lens, a base, and four or more parallel metal wires each having both ends fixed to the holder and the base. The metal wire elastically holds the holder against the base in both the focusing and tracking directions.
まだ金属線にホルダーを駆動するだめの駆動コイルを電
気的に接続することにより、金属線を電線としても利用
できる。By electrically connecting a drive coil for driving the holder to the metal wire, the metal wire can also be used as an electric wire.
また金属線の外周に粘弾性体を付着することによって制
動・効果をもたせるものである。Also, a braking effect is provided by attaching a viscoelastic material to the outer periphery of the metal wire.
実施例の説明
第１図は本発明の一実施例を示すものであり、第２図は
その駆動部の詳細図である。DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows an embodiment of the present invention, and FIG. 2 is a detailed view of its driving section.
対物レンズ１はホルダー２に接着されており、ホルダー
２にフォーカス方向の駆動コイル３が巻かれ、ホルダー
２の両側面には２対のトラ・ノキング方向の駆動コイル
４が接着されている０ゴムチユーブ５に被覆された４本
の金属線６は一端がホルダー２の穴２ａに嵌まって、ホ
ルダー２に貼り付けられたプリント基板７に）・ンダ付
されており、他端はプリント基板８にノ・ンダ付けされ
ている。このプリント基板８はネジ９を介して基台１０
に固着されている。基台１０は磁性材料でできており、
２個のマグネ・７）１１．１１が接着され磁気回路を構
成している。The objective lens 1 is glued to a holder 2, and a driving coil 3 in the focusing direction is wound around the holder 2. Two pairs of driving coils 4 in the tracking and knocking directions are glued to both sides of the holder 2. One end of the four metal wires 6 coated with the holder 2 fits into the hole 2a of the holder 2, and is soldered to the printed circuit board 7 attached to the holder 2, and the other end is attached to the printed circuit board 8. It is marked with no. This printed circuit board 8 is connected to the base 10 through screws 9.
is fixed to. The base 10 is made of magnetic material,
Two magnets 7) 11 and 11 are glued together to form a magnetic circuit.
プリント基板７にはフォーカス方向の駆動コイル３の両
端とトラッキング方向の駆動コイル４の □両
端がハンダ付けされており、プリント基板７の銅箔を介
して金属線６とそれぞれ電気的に結合されている。Both ends of the drive coil 3 in the focus direction and both ends of the drive coil 4 in the tracking direction are soldered to the printed circuit board 7, and are electrically connected to the metal wire 6 through the copper foil of the printed circuit board 7. There is.
プリント基板８にはり一ド線１２がハンダ付けされてお
り、銅箔を介して金属線６と電気的に結合されている。A lead wire 12 is soldered to the printed circuit board 8 and is electrically coupled to the metal wire 6 via a copper foil.
リード線１２に電流を供給すると金属線６を介してフォ
ーカス方向の駆動コイル３ある因はトラッキング方向の
駆動コイル４に電流が流れ、マグネット１１との電磁作
用によりホルダー２及び対物レンズ１がそれぞれの方向
に移動する〇本実節例によればフォーカス方向とトラッ
キング方向を同一の金属線６で支持しているため、両方
向のコンプライアンスが等しくなり、そのタメ両方向を
同量の電力で駆動できる。When a current is supplied to the lead wire 12, the current flows through the driving coil 3 in the focusing direction through the metal wire 6, and the driving coil 4 in the tracking direction flows, and due to the electromagnetic interaction with the magnet 11, the holder 2 and the objective lens 1 are moved to their respective positions. According to this example, the focus direction and the tracking direction are supported by the same metal wire 6, so the compliance in both directions is equal, and thus both directions can be driven with the same amount of power.
−１だ金属線６は板状でなく線状であるため、フォーカ
ス方向に保持する金属線６がフォーカス方向にたわんだ
ときに、トラッキング方向に保持する金属線６にかかる
不要な応力は、板バネを使用した従来のものに比べては
るかに小さくなる。このため有害な部分共振が少なくな
る。-1 Since the metal wire 6 is linear rather than plate-shaped, when the metal wire 6 held in the focus direction bends in the focus direction, unnecessary stress applied to the metal wire 6 held in the tracking direction is Much smaller than conventional ones that use springs. This reduces harmful partial resonance.
さらに−片持ち構造のだめ、同じコンプライアンスを得
るには両持ち構造に比べて金属線６の線径を太くするこ
とができ、その結果、金属線６の長さを長くすることが
できる。このためホルダー２の変位が大きく、しかもへ
たりにくい信頼性の高いバネ特性が得られる。逆に両持
ち構造の場合と同じ線径の金属線６を用いるのであれば
、コンプライアンスが大きくとれるため高効率となる。Furthermore, in order to obtain the same compliance, the wire diameter of the metal wire 6 can be made thicker than that in a double-sided structure, and as a result, the length of the metal wire 6 can be increased. For this reason, the displacement of the holder 2 is large, and highly reliable spring characteristics that are resistant to fatigue can be obtained. On the other hand, if the metal wire 6 having the same wire diameter as in the case of the double-end structure is used, the compliance can be increased, resulting in high efficiency.
したがってコンプライアンスと線径の両方を考慮して最
適の値に設定すれば、高効率で信頼性の高いバネ特性が
得られる。Therefore, if both compliance and wire diameter are considered and set to the optimum value, highly efficient and reliable spring characteristics can be obtained.
また基台１０とホルダー２が常に平行を保ったま捷移動
するので、対物レンズ１の傾きを発生しない。Furthermore, since the base 10 and the holder 2 always move while maintaining parallelism, the objective lens 1 does not tilt.
さらにネジ９を中心にして可動部全体が回転できるため
、その傾きが容易に調整できる。Furthermore, since the entire movable part can be rotated around the screw 9, its inclination can be easily adjusted.
なお本実施例では金属線６を４本としたが、それ以上、
例えば一方に３本、他方ＶＣ３本の合計６本であっても
よい。また金属線６にゴムチューブ５を被覆したが、ゴ
ムに金属線６をインサート成形してもよい。またプリン
ト基板８と基台１ｏを１本のネジ９で固定したが基台１
ｏとプリント基板８０間にゴムをはさんでネジで固定し
て、ホルダー２のフォーカス方向やトラッキング方向の
傾きだけでなく長手方向の位置の調整を可能にしてもよ
い。In this embodiment, the number of metal wires 6 is four, but if there are more than four,
For example, there may be a total of six VCs, three on one side and three VCs on the other. Further, although the metal wire 6 is covered with the rubber tube 5, the metal wire 6 may be insert-molded in rubber. Also, the printed circuit board 8 and the base 1o were fixed with one screw 9, but the base 1
By sandwiching rubber between the holder 2 and the printed circuit board 80 and fixing them with screws, it is possible to adjust not only the inclination of the holder 2 in the focusing direction and the tracking direction but also the position in the longitudinal direction.
発明の効果
以上のように本発明は４本以上の金属線で対物レンズを
含むホルダーを基台に保持し、これらの金属線のたわみ
によ−てホルダーを互に直交する２軸方向に移動させる
ようにしたものであるので、非常に単純な構造になり、
コストが安く、しかも部分共振の少ない対物レンズ保持
装置が実現できる０Effects of the Invention As described above, the present invention holds a holder containing an objective lens on a base using four or more metal wires, and moves the holder in two mutually orthogonal axes directions by bending these metal wires. It has a very simple structure,
A low-cost objective lens holding device with less partial resonance can be realized.
第１図は本発明の一実施例の斜視図、第２図はその要部
の分解斜視図である。
１・・・・・・対物レンズ、２・・・・・・ホルダー、
３・・・・・・フォーカス方向の駆動コイル、４・・・
・・・トラッキング方向の駆動コイル、５・・・・・・
ゴムチューブ、６・・・・・−金属線、７・・・・・・
プリント基板、８・・・・・・プリント基板、９・・・
・・・ネジ、１ｏ・・・・・・基台、１１・・・・・・
マグネット、１２・・・・・・リード線。FIG. 1 is a perspective view of one embodiment of the present invention, and FIG. 2 is an exploded perspective view of the main parts thereof. 1...Objective lens, 2...Holder,
3... Drive coil in focus direction, 4...
...Drive coil in the tracking direction, 5...
Rubber tube, 6...-Metal wire, 7...
Printed circuit board, 8... Printed circuit board, 9...
...Screw, 1o...Base, 11...
Magnet, 12...Lead wire.
Claims (3)
が上記ホルダーに固着され、他端が上記基台に固着され
た互いに平行な４本以上の金属線とで構成された光ティ
スフプレーヤの対物レンズ保持装置。(1) An optical fiber that is composed of a holder that fixes an objective lens, a base, and four or more mutually parallel metal wires that have one end fixed to the holder and the other end fixed to the base. Player objective lens holding device.
コイルの電磁作用により上記ホルダーを互に直交する２
軸方向に駆動するように構成するとともに、上記駆動コ
イルの両端を金属線に電気的に接属し、この金属線を介
して上記駆動コイルに電流を流すように構成したことを
特徴とする特許請求の範囲第１項記載の光デイスクプレ
ーヤの対物レンズ保持装置。(2) The holder is moved perpendicularly to each other by the electromagnetic action of the magnet 2 installed on the base and the drive coil installed on the boulder.
A patent claim characterized in that the drive coil is configured to be driven in the axial direction, and both ends of the drive coil are electrically connected to a metal wire, and a current is caused to flow through the drive coil through the metal wire. An objective lens holding device for an optical disc player according to item 1.
特徴とする特許請求の範囲第１項記載の光デイスクプレ
ーヤの対物レンズ保持装置。(3) The objective lens holding device for an optical disc player according to claim 1, wherein a viscoelastic body is attached to the outer periphery of the metal wire.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9711283A JPS59221839A (en) | 1983-05-31 | 1983-05-31 | Object lens holding device of optical disc player |
| US06/700,818 US4646283A (en) | 1983-05-31 | 1984-05-29 | Objective lens driving apparatus for optical disc player |
| DE8484902073T DE3469814D1 (en) | 1983-05-31 | 1984-05-29 | Apparatus for driving objective lens of optical disc player |
| US09/120,799 USRE37084E1 (en) | 1983-05-31 | 1984-05-29 | Objective lens driving apparatus for optical disc player |
| EP84902073A EP0144445B1 (en) | 1983-05-31 | 1984-05-29 | Apparatus for driving objective lens of optical disc player |
| PCT/JP1984/000275 WO1984004841A1 (en) | 1983-05-31 | 1984-05-29 | Apparatus for driving objective lens of optical disc player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9711283A JPS59221839A (en) | 1983-05-31 | 1983-05-31 | Object lens holding device of optical disc player |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1090176A Division JPH0816985B2 (en) | 1989-04-10 | 1989-04-10 | Objective lens holding device for optical disk device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59221839A true JPS59221839A (en) | 1984-12-13 |
| JPH0449174B2 JPH0449174B2 (en) | 1992-08-10 |
Family
ID=14183493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9711283A Granted JPS59221839A (en) | 1983-05-31 | 1983-05-31 | Object lens holding device of optical disc player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59221839A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6186823U (en) * | 1984-11-09 | 1986-06-06 | ||
| JPS61258346A (en) * | 1985-05-13 | 1986-11-15 | Toshiba Corp | Objective lens supporting device for optical pickup |
| JPS62202626U (en) * | 1986-06-13 | 1987-12-24 | ||
| JPH01243246A (en) * | 1988-03-25 | 1989-09-27 | Olympus Optical Co Ltd | Optical system supporting device |
| US4902996A (en) * | 1986-12-27 | 1990-02-20 | Kabushiki Kaisha Toshiba | Movable coil driving unit |
| US4948230A (en) * | 1986-12-26 | 1990-08-14 | Kabushiki Kaisha Toshiba | Objective lens driving apparatus |
| JPH04102232A (en) * | 1990-08-21 | 1992-04-03 | Hitachi Ltd | Objective lens driving device and optical disk device |
| US5428481A (en) * | 1989-11-02 | 1995-06-27 | Olympus Optical Co., Ltd. | Optical system supporting device |
| US5475661A (en) * | 1992-04-07 | 1995-12-12 | Matsushita Electric Industrial Co., Ltd. | Objective lens actuator having frame-shaped leaf springs for minimizing focusing and tracking errors |
| US5488603A (en) * | 1993-06-21 | 1996-01-30 | Matsushita Electric Industrial Co., Ltd. | Optical information recording reproducing apparatus with first and second electrokinetic transducers at respective distances |
| JPH09167363A (en) * | 1996-10-29 | 1997-06-24 | Toshiba Corp | Objective lens driving device |
| JPH09171627A (en) * | 1996-10-29 | 1997-06-30 | Toshiba Corp | Objective lens driving device |
| FR2782397A1 (en) * | 1998-08-14 | 2000-02-18 | Samsung Electronics Co Ltd | Two dimensional drive mechanism especially for displacement of the lens assembly of a digital CCD camera has X and Y drive mechanisms arranged at the same height as the lens mounting |
-
1983
- 1983-05-31 JP JP9711283A patent/JPS59221839A/en active Granted
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6186823U (en) * | 1984-11-09 | 1986-06-06 | ||
| JPH0419615Y2 (en) * | 1984-11-09 | 1992-05-06 | ||
| JPS61258346A (en) * | 1985-05-13 | 1986-11-15 | Toshiba Corp | Objective lens supporting device for optical pickup |
| JPH0452815Y2 (en) * | 1986-06-13 | 1992-12-11 | ||
| JPS62202626U (en) * | 1986-06-13 | 1987-12-24 | ||
| US4948230A (en) * | 1986-12-26 | 1990-08-14 | Kabushiki Kaisha Toshiba | Objective lens driving apparatus |
| US4902996A (en) * | 1986-12-27 | 1990-02-20 | Kabushiki Kaisha Toshiba | Movable coil driving unit |
| JPH01243246A (en) * | 1988-03-25 | 1989-09-27 | Olympus Optical Co Ltd | Optical system supporting device |
| US5428481A (en) * | 1989-11-02 | 1995-06-27 | Olympus Optical Co., Ltd. | Optical system supporting device |
| JPH04102232A (en) * | 1990-08-21 | 1992-04-03 | Hitachi Ltd | Objective lens driving device and optical disk device |
| US5475661A (en) * | 1992-04-07 | 1995-12-12 | Matsushita Electric Industrial Co., Ltd. | Objective lens actuator having frame-shaped leaf springs for minimizing focusing and tracking errors |
| US5488603A (en) * | 1993-06-21 | 1996-01-30 | Matsushita Electric Industrial Co., Ltd. | Optical information recording reproducing apparatus with first and second electrokinetic transducers at respective distances |
| JPH09167363A (en) * | 1996-10-29 | 1997-06-24 | Toshiba Corp | Objective lens driving device |
| JPH09171627A (en) * | 1996-10-29 | 1997-06-30 | Toshiba Corp | Objective lens driving device |
| FR2782397A1 (en) * | 1998-08-14 | 2000-02-18 | Samsung Electronics Co Ltd | Two dimensional drive mechanism especially for displacement of the lens assembly of a digital CCD camera has X and Y drive mechanisms arranged at the same height as the lens mounting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0449174B2 (en) | 1992-08-10 |
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