JPH0449174B2 - - Google Patents
Info
- Publication number
- JPH0449174B2 JPH0449174B2 JP9711283A JP9711283A JPH0449174B2 JP H0449174 B2 JPH0449174 B2 JP H0449174B2 JP 9711283 A JP9711283 A JP 9711283A JP 9711283 A JP9711283 A JP 9711283A JP H0449174 B2 JPH0449174 B2 JP H0449174B2
- Authority
- JP
- Japan
- Prior art keywords
- holder
- objective lens
- tracking
- metal wire
- base
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000005476 soldering Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011889 copper foil Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、デイスク状の記録媒体に光スポツト
を投射して光学的に情報を読み取ることができる
光デイスク装置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 Industrial Application The present invention relates to an objective lens holding device for an optical disk device that is capable of optically reading information by projecting a light spot onto a disk-shaped recording medium.
従来の構成とその問題点
一般にこの種の光デイスク装置において、正確
に情報を読み取るためには、デイスクのソリや振
れに対して対物レンズと情報トラツク位置との距
離を制御するフオーカス制御と、情報トラツクの
偏心に対して対物レンズを追従制御するトラツキ
ング制御を行う必要があり、そのためにフオーカ
ス方向・トラツ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。Conventional configuration and its problems In general, in this type of optical disk device, 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, and It is necessary to perform tracking control in which the objective lens follows the eccentricity of the track, and for this purpose it is necessary to hold the objective lens so that it can move freely in the focus direction and the tracking direction.
従来は対物レンズをフオーカス用とトラツキン
グ用別々の板バネで保持し、この板バネのたわみ
によつて対物レンズのフオーカス方向・トラツキ
ング方向の動きを許容するようにしていた。しか
しながら、このようにフオーカス用とトラツキン
グ用の別々の板バネで対物レンズを保持すること
は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つた。すなわ
ち、対物レンズのフオーカス方向の動きを許容す
る板バネがフオーカス方向にたわむときに、トラ
ツキング方向の動きを許容する板ばねに対してフ
オ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つた。 Conventionally, the objective lens is held by separate leaf springs for focusing and tracking, and the deflection of the leaf springs allows movement of the objective lens in the focusing direction and the tracking direction. However, holding the objective lens with separate leaf springs for focusing and tracking in this manner has the disadvantage that the mechanism is complicated and costly, and harmful partial resonance is likely to occur. In other words, when the leaf spring that allows movement of the objective lens in the focus direction bends in the focus direction, stress in the focus direction is generated on the leaf spring that allows movement in the tracking direction, which causes partial resonance. There was a drawback of doing so.
発明の目的
本発明はこのような従来の解消するもので、コ
ストが安く、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する。OBJECTS OF THE INVENTION It is an object of the present invention to provide an objective lens holding device that overcomes the conventional problems, is inexpensive, and produces fewer harmful partial resonances.
発明の構成
本発明は対物レンズを保持するホルダーと、基
台と、ホルダー及び基台にそれぞれの両端が取付
けられた少なくとも４本の金属線を備えた対物レ
ンズ保持装置であり、上記金属線により、基台に
対してホルダーをフオーカス方向・トラツキング
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 holding an objective lens, a base, and at least four metal wires each having both ends attached to the holder and the base. , which elastically holds the holder against the base in both the focusing and tracking directions.
また金属線をホルダーを駆動するための駆動コ
イルに電流を供給する通電線として兼用させたも
のである。 Further, the metal wire is also used as a current-carrying wire for supplying current to a drive coil for driving the holder.
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図はその要部の分解斜視図である。DESCRIPTION OF EMBODIMENTS FIG. 1 shows an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the main parts.
対物レンズ１はホルダー２に接着により保持さ
れており、ホルダー２の周囲にはフオーカス用の
駆動コイル３が巻かれ、さらにホルダー２の対向
する両側面には２対のトラツキング用の駆動コイ
ル４が接着により取付けられている。 The objective lens 1 is held by a holder 2 by adhesive, and a focusing drive coil 3 is wound around the holder 2, and two pairs of tracking drive coils 4 are arranged on opposite sides of the holder 2. Attached by adhesive.
ゴムチユーブ５に被覆された４本の金属線６は
それぞれの一端がホルダー２の対向する側面にお
いてそれぞれ上下部に設けられた穴２ａを貫通
し、それぞれの先端はホルダー２の側面にそれぞ
れ貼り付けにより取付けられたプリント基板７に
ハンダ付けによつて接続されている。一方、それ
ぞれの金属線６の他端はプリント基板８にハンダ
付けにより接続されている。このプリント基板８
はネジ９によつてコ字状の基台１０の側面に固着
されており、これによりホルダー２は４本の金属
線６により弾性もつて基台１０に片持ち支持され
ている。基台１０は磁性材料で構成されており、
その対向する側板の内側には２個のマグネツト１
１，１１が接着により取付けられており、磁気回
路を構成している。 One end of each of the four metal wires 6 coated on the rubber tube 5 passes through holes 2a provided in the upper and lower parts of the opposing sides of the holder 2, and each tip is attached to the side of the holder 2. It is connected to the attached printed circuit board 7 by soldering. On the other hand, the other end of each metal wire 6 is connected to a printed circuit board 8 by soldering. This printed circuit board 8
is fixed to the side surface of a U-shaped base 10 with screws 9, and thereby the holder 2 is supported in a cantilevered manner on the base 10 with elasticity by the four metal wires 6. The base 10 is made of magnetic material,
There are two magnets 1 inside the opposing side plates.
1 and 11 are attached by adhesive to form a magnetic circuit.
プリント基板７にはフオーカス用の駆動コイル
３の両端とトラツキング用の駆動コイル４の両端
がハンダ付けにより接続されており、これらの駆
動コイル３と４はプリント基板７の銅箔を介して
４本の金属線６とそれぞれ電気的に結合されてい
る。 Both ends of the focusing drive coil 3 and both ends of the tracking drive coil 4 are connected to the printed circuit board 7 by soldering, and these four drive coils 3 and 4 are connected via the copper foil of the printed circuit board 7. are electrically coupled to the metal wires 6, respectively.
プリント基板８にはリード線１２がハンダ付け
により接続されており、銅箔を介して前記金属線
６と電気的に結合されている。 A lead wire 12 is connected to the printed circuit board 8 by soldering, 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
してフオーカス用の駆動コイル３あるいはトラツ
キング用の駆動コイル４に電流が流れ、マグネツ
ト１１との電磁作用によりホルダー２とともに対
物レンズ１は金属線６の弾性に抗してそれぞれの
方向に移動する。 When a current is supplied to the lead wire 12, the current flows through the metal wire 6 to the focusing drive coil 3 or the tracking drive coil 4, and due to the electromagnetic interaction with the magnet 11, the objective lens 1 and the holder 2 are moved by the metal wire 6. Move in each direction against elasticity.
本実施例によれば同一形状の４本の金属線６で
対物レンズ１を保持しているホルダー２を片持ち
支持しているため、そのホルダー２のフオーカス
方向とトラツキング方向の両方向のコンプライア
ンスが等しくなり、そのため両方向を同量の電力
で駆動できる。 According to this embodiment, since the holder 2 holding the objective lens 1 is cantilever-supported by four metal wires 6 of the same shape, the compliance of the holder 2 in both the focusing direction and the tracking direction is equal. Therefore, both directions can be driven with the same amount of power.
また金属線６は線状であるため、ホルダー２の
フオーカス方向の移動で金属線６がフオーカス方
向にたわんだときに、それと略直交するトラツキ
ング方向の金属線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。 Furthermore, since the metal wire 6 is linear, when the metal wire 6 is bent in the focus direction due to the movement of the holder 2 in the focus direction, unnecessary stress applied to the metal wire 6 in the tracking direction that is approximately perpendicular to the bending is caused by the plate spring. It is much smaller than the conventional one using . This reduces harmful partial resonance.
さらに、片持ち構造のため、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の変位を大きくとることができるため、大きな
フオーカス制御、トラツキング制御が可能とな
り、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, because of the cantilever structure, the wire diameter of the metal wire 6 can be made thicker than that of a double-end support structure in order to obtain the same compliance, and as a result, the length of the metal wire 6 can be increased. Therefore, since the displacement of the holder 2 can be increased, large focus control and tracking control are possible, 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.
したがつ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 taken into consideration and set to optimal values, highly efficient and reliable spring characteristics can be obtained.
また基台１０の側板に対してホルダー２を常に
平行を保つたまま移動させることができるので、
対物レンズ１の傾きを発生しない。 In addition, since the holder 2 can be moved while always keeping parallel to the side plate of the base 10,
No tilting of the objective lens 1 occurs.
さらにネジ９を中心にして可動部全体を回転さ
せることができるため、製造時において対物レン
ズ１の傾き調整が容易である。 Furthermore, since the entire movable part can be rotated around the screw 9, the tilt of the objective lens 1 can be easily adjusted during manufacturing.
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、他方に３本の合計６
本であつてもよい。また金属線６にゴムチユーブ
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１０を
１本のネジ９で固定したが基台１０とプリント基
板８の間にゴムをはさんでネジ固定して、ホルダ
ー２のフオーカス方向やトラツキング方向の傾き
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 there may be more, for example, three on one side and three on the other, totaling 6.
It could be a book. 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 10 are fixed with one screw 9, but by inserting rubber between the base 10 and the printed circuit board 8 and fixing the screw, it is possible to tilt the holder 2 only in the focusing direction and the tracking direction. It may also be possible to adjust the longitudinal position without any modification.
発明の効果
以上のように本発明は４本以上の弾性を有する
金属線で対物レンズを保持するホルダーを基台に
片持ち保持し、これらの金属線自身のフオーカス
方向とトラツキング方向の撓みによつてホルダー
の移動を許容するように構成したものであるの
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。また金属線自身を駆動コイルへの通電に
兼用したため、専用の通電線が不要であり、この
点でも構造が簡単であり、部品数も少なくなるも
のである。Effects of the Invention As described above, the present invention uses four or more elastic metal wires to hold a holder that holds an objective lens cantilevered on a base, and uses the bending of these metal wires themselves in the focusing direction and the tracking direction. Since the objective lens holder is configured to allow movement of the holder, the structure is extremely simple, the cost is low, and an objective lens holding device with less partial resonance can be realized. Furthermore, since the metal wire itself is used for energizing the drive coil, there is no need for a dedicated energizing wire, which also simplifies the structure and reduces the number of parts.
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
オーカス用の駆動コイル、４……トラツキング用
の駆動コイル、５……ゴムチユーブ、６……金属
線、７……プリント基板、８……プリント基板、
９……ネジ、１０……基台、１１……マグネツ
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 for focusing, 4...Drive coil for tracking, 5...Rubber tube, 6...Metal wire, 7...Printed circuit board, 8...Print substrate,
9...screw, 10...base, 11...magnet, 12...lead wire.
Claims (1)
一端が前記基台に取付けられ、他端が前記ホルダ
ーに取付けられた少なくとも４本の長手方向に実
質的に伸縮しない導電性を有する金属線と、上記
基台に取付けたマグネツトと前記ホルダーに取付
けたフオーカス駆動コイルとトラツキング駆動コ
イルを有し上記ホルダーを上記対物レンズの光軸
方向であるフオーカス方向及びそのフオーカス方
向と略直交する方向であるトラツキング方向に駆
動する駆動手段とを備え、上記各金属線は上記ホ
ルダーがフオーカス方向及びトラツキング方向に
自由に移動可能なように１本１本の金属線自身が
フオーカス方向及びトラツキング方向に弾性を有
し、それによつて上記駆動手段によりフオーカス
方向及びトラツキング方向に駆動された際に各金
属線自身が駆動手段による駆動方向に撓むことに
より上記ホルダーの移動を許すように構成すると
共に上記金属線を介して上記フオーカス駆動コイ
ルと上記トラツキング駆動コイルに駆動電流を供
給するように構成したことを特徴とする光デイス
ク装置の対物レンズ保持装置。 ２ 各金属線の一端を前記基台に取付けたプリン
ト基板の銅箔にハンダ付けして固定したことを特
徴とする特許請求の範囲第１項記載の光デイスク
装置の対物レンズ保持装置。 ３ 各金属線の他端を前記ホルダーに取付けたプ
リント基板の銅箔にハンダ付けして固定したこと
を特徴とする特許請求の範囲第１項記載の光デイ
スク装置の対物レンズ保持装置。[Claims] 1. A base, a holder for holding an objective lens,
At least four electrically conductive metal wires that do not substantially stretch in the longitudinal direction, one end of which is attached to the base and the other end of which is attached to the holder; a magnet attached to the base; drive means having a focus drive coil and a tracking drive coil for driving the holder in a focus direction which is the optical axis direction of the objective lens and a tracking direction which is a direction substantially perpendicular to the focus direction; Each metal wire itself has elasticity in the focusing direction and the tracking direction so that the holder can move freely in the focusing direction and the tracking direction. When driven by the metal wires, each metal wire bends in the driving direction of the driving means to allow the movement of the holder, and a driving current is applied to the focus drive coil and the tracking drive coil through the metal wires. An objective lens holding device for an optical disk device, characterized in that the objective lens holding device is configured to supply. 2. The objective lens holding device for an optical disk device according to claim 1, wherein one end of each metal wire is fixed by soldering to a copper foil of a printed circuit board attached to the base. 3. The objective lens holding device for an optical disk device according to claim 1, wherein the other end of each metal wire is fixed by soldering to a copper foil of a printed circuit board attached to the holder.
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 |
| PCT/JP1984/000275 WO1984004841A1 (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 |
| DE8484902073T DE3469814D1 (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 JPS59221839A (en) | 1984-12-13 |
| JPH0449174B2 true 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) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0419615Y2 (en) * | 1984-11-09 | 1992-05-06 | ||
| JP2611966B2 (en) * | 1985-05-13 | 1997-05-21 | 株式会社東芝 | Objective lens drive |
| JPH0452815Y2 (en) * | 1986-06-13 | 1992-12-11 | ||
| EP0273367B1 (en) * | 1986-12-26 | 1994-02-16 | Kabushiki Kaisha Toshiba | Objective lens driving apparatus |
| JPS63167658A (en) * | 1986-12-27 | 1988-07-11 | Toshiba Corp | Movable coil type driving device |
| JP2933162B2 (en) * | 1988-03-25 | 1999-08-09 | オリンパス光学工業株式会社 | Optical head device |
| JP2765633B2 (en) * | 1989-11-02 | 1998-06-18 | オリンパス光学工業株式会社 | Optical system support device |
| JP2761972B2 (en) * | 1990-08-21 | 1998-06-04 | 株式会社日立製作所 | 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 |
| JP2791316B2 (en) * | 1996-10-29 | 1998-08-27 | 株式会社東芝 | Objective lens drive |
| JP2857112B2 (en) * | 1996-10-29 | 1999-02-10 | 株式会社東芝 | Objective lens drive |
| KR100296389B1 (en) * | 1998-08-14 | 2001-08-07 | 박태진 | 2-axis actuator |
-
1983
- 1983-05-31 JP JP9711283A patent/JPS59221839A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59221839A (en) | 1984-12-13 |
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