JPH11232671A - Object lens driving device - Google Patents
Object lens driving deviceInfo
- Publication number
- JPH11232671A JPH11232671A JP10035586A JP3558698A JPH11232671A JP H11232671 A JPH11232671 A JP H11232671A JP 10035586 A JP10035586 A JP 10035586A JP 3558698 A JP3558698 A JP 3558698A JP H11232671 A JPH11232671 A JP H11232671A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- holding member
- metal wires
- metal wire
- fixed
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
-
- 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
- G11B7/0935—Details of the moving parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、回転駆動される円
盤状記録媒体上に記録された情報を光学的に読み取るた
めの対物レンズを、その対物レンズの光軸に平行なフォ
ーカシング方向および光軸に垂直なトラッキング方向に
駆動する対物レンズ駆動装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an objective lens for optically reading information recorded on a rotationally driven disk-shaped recording medium, and a focusing direction and an optical axis parallel to the optical axis of the objective lens. The present invention relates to an objective lens driving device that is driven in a tracking direction perpendicular to.
【０００２】[0002]
【従来の技術】回転駆動される円盤状記録媒体上に記録
された情報を光学的に読み取る情報再生装置に用いられ
る対物レンズ駆動装置における対物レンズ保持部材のひ
とつの支持手段として、例えば、４本の金属ワイヤを用
いそれぞれの一端を前記対物レンズ保持部材に固定し、
他端を固定部に固定する片持ち支持方式がある。この片
持ち支持方式においては、前記対物レンズ保持部材を含
む可動体質量と、主に前記金属ワイヤのばね定数によっ
て、前記対物レンズ駆動装置の一次共振周波数が定ま
る。2. Description of the Related Art One supporting means of an objective lens holding member in an objective lens driving device used for an information reproducing apparatus for optically reading information recorded on a rotationally driven disk-shaped recording medium is, for example, four support members. Each end is fixed to the objective lens holding member using a metal wire of,
There is a cantilever support method in which the other end is fixed to a fixing portion. In this cantilever support system, the primary resonance frequency of the objective lens driving device is determined by the mass of the movable body including the objective lens holding member and the spring constant of the metal wire.
【０００３】この一次共振周波数帯域においては、前記
対物レンズ駆動装置への印加電流に対する駆動感度が著
しく上昇するため、一次共振周波数帯域が前記記録媒体
の回転周波数帯域にほぼ一致するように設計を行うこと
によって、前記対物レンズ保持部材に固定された対物レ
ンズによって生成される光スポットが、前記記録媒体の
回転による情報記録トラックのフォーカシング方向およ
びトラッキング方向の変位に追従するために必要な加速
度を確保することが容易になり、これによって前記情報
再生装置の光学的な情報の読み取りに要求されるフォー
カシングおよびトラッキングサーボ性能を確保すること
ができる。In this primary resonance frequency band, since the drive sensitivity to the current applied to the objective lens driving device is significantly increased, the design is performed so that the primary resonance frequency band substantially matches the rotation frequency band of the recording medium. Thereby, the light spot generated by the objective lens fixed to the objective lens holding member secures an acceleration required for following the displacement of the information recording track in the focusing direction and the tracking direction due to the rotation of the recording medium. This facilitates the focusing and tracking servo performance required for reading the optical information of the information reproducing apparatus.
【０００４】近年ＣＤ−ＲＯＭ再生装置においては、従
来音楽プログラム再生等に用いられている記録情報の標
準転送速度に対して、４倍速、８倍速、１６倍速という
ようなデータ転送の高速化が推し進められＣＤ−ＲＯＭ
再生装置市場の主流を占めるようになった。このような
データ転送の高速化は情報記録媒体であるディスクの回
転速度を増加させる手段によって成されており、このよ
うな回転速度のもとで対物レンズによって生成される光
スポットがディスクの情報トラックの変位に正確に追従
するために必要な加速度感度が、情報の読み取りを担う
光ピックアップの対物レンズ駆動装置に要求されてく
る。In recent years, in a CD-ROM reproducing apparatus, data transfer speeds such as 4 ×, 8 ×, and 16 × have been promoted with respect to the standard transfer speed of recording information conventionally used for music program reproduction and the like. CD-ROM
It has become the mainstream in the playback equipment market. Such high-speed data transfer is achieved by means for increasing the rotation speed of the disk as the information recording medium. At such a rotation speed, the light spot generated by the objective lens is moved to the information track of the disk. The acceleration sensitivity required to accurately follow the displacement of the optical pickup is required for the objective lens driving device of the optical pickup that reads information.
【０００５】この要求を満たすため従来対物レンズ駆動
装置においては、その一次共振周波数をディスクの回転
速度の増加に応じて高めていき、情報記録トラックのフ
ォーカシング方向およびトラッキング方向での最大変位
が発生するディスクの回転周波数帯域において最大レベ
ルの加速度感度が得られるように設計を行っていた。In order to satisfy this requirement, in a conventional objective lens driving device, its primary resonance frequency is increased in accordance with an increase in the rotational speed of the disk, and maximum displacement of the information recording track in the focusing direction and the tracking direction occurs. The design was made so that the maximum level of acceleration sensitivity could be obtained in the rotational frequency band of the disk.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、データ
転送の高速化を目的としたディスクの回転速度の増加に
応じて前記対物レンズ駆動装置が有する一次共振周波数
を高めていくことは、ＤＣ帯域に近いディスクの回転周
波数帯域において前記対物レンズによって生成された光
スポットが情報記録トラックの変位に追従していくため
の加速度感度を低下させることになり、ＣＤ−ＲＯＭ再
生装置の標準機能である音楽再生等に適用されるデータ
の標準転送速度下での動作性能に支障をきたす要因とな
っている。However, increasing the primary resonance frequency of the objective lens driving device in accordance with an increase in the rotational speed of the disk for the purpose of speeding up data transfer is close to the DC band. In the rotational frequency band of the disk, the acceleration sensitivity for the light spot generated by the objective lens to follow the displacement of the information recording track is reduced, and music reproduction and the like which are standard functions of the CD-ROM reproducing apparatus are performed. This is a factor that hinders the operation performance of the data applied at the standard transfer speed.
【０００７】したがって、ＣＤ−ＲＯＭ再生装置のよう
に、データ転送速度が増加傾向にある光学的情報読み取
り装置においては、少なくともふたつのディスク回転周
波数帯域において光スポットが情報記録トラックの変位
に正確に追従しフォーカシングサーボおよびトラッキン
グサーボの動作が正常に行われるための加速度感度が対
物レンズ駆動装置に要求される。Therefore, in an optical information reading apparatus such as a CD-ROM reproducing apparatus in which the data transfer speed is increasing, the light spot accurately follows the displacement of the information recording track in at least two disk rotation frequency bands. The acceleration sensitivity required for the normal operation of the focusing servo and the tracking servo is required of the objective lens driving device.
【０００８】[0008]
【課題を解決するための手段】本発明の対物レンズ駆動
装置は、前記対物レンズ保持部材の支持手段として４本
を一組とする二組の金属ワイヤを用い、４本の第一の金
属ワイヤにより前記対物レンズ保持部材を中継保持部材
に保持し、その中継保持部材を４本の第二の金属ワイヤ
により固定部に保持することを特徴とするものであり、
前記第一の金属ワイヤの弾性変形により移動可能に支持
される前記対物レンズ保持部材などの部材の総和質量と
４本の第一の金属ワイヤのばね定数による第一の自由振
動系と、４本の第二の金属ワイヤにより前記中継保持部
材を固定部に保持し、その第二の金属ワイヤの弾性変形
により移動可能に支持される前記対物レンズ保持部材お
よび中継部材などの部材の総和質量と４本の第二の金属
ワイヤのばね定数による第二の自由振動系との二つの自
由振動系を構成し、これらの構成部材の質量と前記金属
ワイヤのばね定数を最適化させることによって前記第一
の自由振動系によってもたらされる共振周波数よりも低
い帯域において前記第二の自由振動系に固有の共振現象
を起こさせるものである。The objective lens driving apparatus of the present invention uses two sets of four metal wires as a set of four metal wires as support means for the objective lens holding member. Wherein the objective lens holding member is held by a relay holding member, and the relay holding member is held at a fixed portion by four second metal wires.
A first free vibration system based on a total mass of members such as the objective lens holding member movably supported by elastic deformation of the first metal wire and a spring constant of the four first metal wires; The second metal wire holds the relay holding member to the fixed portion, and the total mass of the objective lens holding member and the relay member and the like, which are movably supported by elastic deformation of the second metal wire, and The two free vibration systems of the second metal wire and the second free vibration system based on the spring constant of the second metal wire are configured, and the mass of these components and the spring constant of the metal wire are optimized to optimize the first free vibration. A resonance phenomenon inherent to the second free vibration system in a band lower than the resonance frequency provided by the free vibration system.
【０００９】この構成によれば、前記第一の自由振動系
によってもたらされる共振周波数と前記第二の自由振動
系によってもたらされる共振周波数それぞれの帯域にお
いて前記対物レンズ駆動装置における対物レンズ保持部
材に作用する加速度感度が上昇し、前記第一の自由振動
系に固有の共振周波数をデータの高速転送を目的とする
ディスクの高速回転周波数に略一致させることによって
前記光スポットの前記情報記録トラックの変位への追従
性能を向上させ、さらに前記第二の自由振動系において
発生する共振によってデータの標準転送速度でのディス
クの回転周波数帯域での前記光スポットの前記情報記録
トラックの変位への追従性能を向上させることが可能に
なる。According to this structure, the action on the objective lens holding member of the objective lens driving device is performed in the respective bands of the resonance frequency provided by the first free vibration system and the resonance frequency provided by the second free vibration system. The acceleration sensitivity increases, and the resonance frequency inherent in the first free vibration system is substantially matched with the high-speed rotation frequency of the disk for the purpose of high-speed data transfer, thereby causing the light spot to displace the information recording track. And the follow-up performance of the light spot in the rotation frequency band of the disc at the standard data transfer speed due to the resonance generated in the second free vibration system is improved. It becomes possible to do.
【００１０】[0010]
【発明の実施の形態】以下図面を参照して本発明の実施
の形態をＣＤ−ＲＯＭ再生装置に用いられる光ピックア
ップの対物レンズ駆動装置を例にとり説明する。図１お
よび図２において、対物レンズ１を保持する対物レンズ
保持部材２の外周には、前記対物レンズ１の光軸に平行
なフォーカシング方向に駆動力を発生するためのフォー
カシングコイル３と対物レンズの光軸に垂直なトラッキ
ング方向に駆動力を発生するトラッキングコイル４とが
巻き付けられており、その対物レンズ保持部材２の両側
面にはプリント基板５が固定され、これを介して前記フ
ォーカシングコイル３および前記トラッキングコイル４
のそれぞれの両端子と４本の第一の金属ワイヤ６１の一
端が接続固定されることによって電気的導通が成される
と共に、前記金属ワイヤ６１の他端があらかじめ中継支
持ブロック７１に固定されたプリント基板８１に電気的
導通が成されながら接続固定されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, taking an objective lens driving device of an optical pickup used in a CD-ROM reproducing device as an example. 1 and 2, a focusing coil 3 for generating a driving force in a focusing direction parallel to the optical axis of the objective lens 1 and a focusing coil 3 and an objective lens are provided around an objective lens holding member 2 for holding the objective lens 1. A tracking coil 4 that generates a driving force in a tracking direction perpendicular to the optical axis is wound around the printed circuit board 5 on both sides of the objective lens holding member 2, and the focusing coil 3 and the The tracking coil 4
Both terminals are connected to one end of the four first metal wires 61, thereby establishing electrical continuity, and the other end of the metal wire 61 is fixed to the relay support block 71 in advance. The printed circuit board 81 is connected and fixed while being electrically connected.
【００１１】すなわち、前記対物レンズ保持部材２は４
本の第一の金属ワイヤ６１の弾性変形によって移動可能
に中継支持ブロック７１に支持されている。また、前記
中継支持ブロック７１に固定されたプリント基板８１
に、４本の第二の金属ワイヤ６２の一端が接続固定され
ることによって前記第一の金属ワイヤ６１との電気的導
通が成されると共に、その第二の金属ワイヤ６２の他端
があらかじめ固定支持ブロック７２に固定されたプリン
ト基板８２に電気的導通が成されながら接続固定されて
おり、この固定支持ブロック７２は、装置基盤などの固
定部に固定されている。That is, the objective lens holding member 2 is
The first metal wire 61 of the book is movably supported by the relay support block 71 by elastic deformation. Further, the printed circuit board 81 fixed to the relay support block 71
When one end of each of the four second metal wires 62 is connected and fixed, electrical continuity with the first metal wire 61 is established, and the other end of the second metal wire 62 is The printed circuit board 82 fixed to the fixed support block 72 is connected and fixed while being electrically connected to the printed circuit board 82. The fixed support block 72 is fixed to a fixed portion such as a device base.
【００１２】すなわち、前記中継支持ブロック７１は、
前記第一の金属ワイヤ６１と平行した４本の第二の金属
ワイヤ６２の弾性変形によって移動可能に固定部に支持
されている。１０は固定部に固定された磁気ヨーク９
に、前記フォーカシングコイル３およびトラッキングコ
イル４との間に所定の空隙をもって対向するように固定
されたマグネット１０であり、このマグネット１０は、
前記第一の金属ワイヤ６１および第二の金属ワイヤ６２
を介して所定の駆動電流を前記フォーカシングコイル３
およびトラッキングコイル４よってローレンツ力による
駆動力を発生させるための磁界を形成する。これによっ
て、前記フォーカシングコイル３および前記トラッキン
グコイル４への電流供給に応じて対物レンズ１の光軸に
平行なフォーカシング方向と光軸に垂直なトラッキング
方向に関する前記対物レンズ保持部材２の変位が得ら
れ、フォーカシングサーボおよびトラッキングサーボ動
作が成される。That is, the relay support block 71
The four second metal wires 62 parallel to the first metal wire 61 are movably supported by the fixed portion by elastic deformation. 10 is a magnetic yoke 9 fixed to the fixed part
A magnet 10 fixed to the focusing coil 3 and the tracking coil 4 so as to face each other with a predetermined gap.
The first metal wire 61 and the second metal wire 62
A predetermined drive current through the focusing coil 3
In addition, the tracking coil 4 forms a magnetic field for generating a driving force by Lorentz force. Thereby, the displacement of the objective lens holding member 2 with respect to the focusing direction parallel to the optical axis of the objective lens 1 and the tracking direction perpendicular to the optical axis is obtained in accordance with the current supply to the focusing coil 3 and the tracking coil 4. , A focusing servo and a tracking servo operation are performed.
【００１３】図３に、従来使用されている対物レンズ駆
動装置に見られる加速度周波数特性を示す。これによる
と、一次共振周波数帯域において加速度ゲインの著しい
増加がみられ、この周波数帯域を前記ディスクの回転周
波数帯域とおおむね合致させることによって対物レンズ
駆動装置における光スポットの情報記録トラックの変位
への追従感度を高めることが可能になる。さらに、デー
タ転送の高速化を目的としてディスクの回転周波数を上
昇させた場合、図４に示すように対物レンズ駆動装置の
一次共振周波数を上昇させる手段を講じることによって
必要な周波数帯域における追従感度を高めることが可能
になる。ところが、ＤＣ帯域に近い周波数帯域での加速
度ゲインは一次共振周波数の上昇に伴い周波数上昇量の
二乗に反比例して低下していくため、ＣＤ−ＲＯＭ再生
装置を用いた音楽再生等に適用される前記ディスク２２
の低速回転周波数帯域での前記光スポット２１の前記情
報記録トラック２３の変位への追従感度を低下させる要
因となり得る。FIG. 3 shows an acceleration frequency characteristic observed in a conventionally used objective lens driving device. According to this, a remarkable increase in the acceleration gain is observed in the primary resonance frequency band, and this frequency band is substantially matched with the rotational frequency band of the disk, so that the optical spot follows the displacement of the information recording track in the objective lens driving device. It is possible to increase the sensitivity. Further, when the rotational frequency of the disk is increased for the purpose of speeding up data transfer, the tracking sensitivity in the necessary frequency band can be reduced by adopting a means for increasing the primary resonance frequency of the objective lens driving device as shown in FIG. It is possible to increase. However, since the acceleration gain in a frequency band close to the DC band decreases in inverse proportion to the square of the frequency increase with the increase in the primary resonance frequency, it is applied to music reproduction or the like using a CD-ROM reproducing device. The disk 22
In the low-speed rotation frequency band, the light spot 21 may be a factor that lowers the sensitivity of following the displacement of the information recording track 23.
【００１４】そこで本実施の形態では、前述のように前
記対物レンズ保持部材２の支持手段として４本を一組と
する二組の金属ワイヤを用い、一組の第一の金属ワイヤ
６１はそれらの一端が前記対物レンズ保持部材２に固定
され他端が中継支持部材７１に固定され、前記第一の金
属ワイヤ６１によって支持される部材の総和質量と前記
第一の金属ワイヤ６１のばね定数による第一の自由振動
系を構成し、他の一組の第二の金属ワイヤ６２は、一端
が前記中継支持部材７１に固定され、他端を固定部に固
定し、前記第二の金属ワイヤ６２によって支持される部
材の総和質量と前記第二の金属ワイヤ６２のばね定数に
よる第二の自由振動系を構成している。そして、それぞ
れの構成部材の質量と前記金属ワイヤ６１および６２の
ばね定数を最適化させることによって、図５に示すよう
に前記第一の自由振動系に固有の一次共振周波数帯域
と、それよりも低い前記第二の自由振動系に固有の一次
共振周波数帯域双方において前記対物レンズ保持部材２
に作用する加速度ゲインを増大させるものである。Therefore, in this embodiment, as described above, two sets of four metal wires are used as support means for the objective lens holding member 2, and one set of first metal wires 61 One end is fixed to the objective lens holding member 2 and the other end is fixed to the relay support member 71, and depends on the total mass of the members supported by the first metal wire 61 and the spring constant of the first metal wire 61. A first free vibration system is formed, and another set of second metal wires 62 has one end fixed to the relay support member 71 and the other end fixed to a fixing portion. A second free vibration system is constituted by the total mass of the members supported by the second metal wire and the spring constant of the second metal wire 62. Then, by optimizing the mass of each component and the spring constant of the metal wires 61 and 62, as shown in FIG. 5, a primary resonance frequency band unique to the first free vibration system, The objective lens holding member 2 in both low primary resonance frequency bands unique to the second free vibration system.
Is to increase the acceleration gain acting on.
【００１５】[0015]
【発明の効果】以上のように本発明は、対物レンズ保持
部材の支持手段として４本を一組とする二組の金属ワイ
ヤを用いた二組の自由振動系を構成し、第一の自由振動
系に固有の共振周波数をデータの高速転送を目的とする
ディスクの高速回転周波数帯域に略一致させることによ
って前記対物レンズ保持部材に作用する加速度を前記デ
ィスクの高速回転周波数帯域において増大させ、さらに
前記第一の自由振動系に固有の共振周波数よりも低い周
波数帯域に前記第二の自由振動系に固有の共振現象を起
こさせることによって、ＣＤ−ＲＯＭ再生装置を用いた
音楽再生等に適用される前記ディスクの低速回転周波数
帯域での加速度を前記第一の自由振動系のみによって得
られる加速度よりも増大させ、データの高速転送を目的
とする前記ディスクの高速回転周波数帯域と音楽再生等
に適用される前記ディスクの低速回転周波数帯域双方に
おいて前記光スポットの前記情報記録トラックの変位へ
の追従感度を高めることを可能とする対物レンズ駆動装
置を提供するものである。As described above, the present invention constitutes two sets of free vibration systems using two sets of four metal wires as a set of support means for the objective lens holding member. The acceleration acting on the objective lens holding member is increased in the high-speed rotation frequency band of the disk by substantially matching the resonance frequency unique to the vibration system with the high-speed rotation frequency band of the disk for the purpose of high-speed data transfer, and By causing a resonance phenomenon unique to the second free vibration system in a frequency band lower than a resonance frequency unique to the first free vibration system, the present invention is applied to music reproduction or the like using a CD-ROM reproducing device. The acceleration in the low-speed rotation frequency band of the disk is made larger than the acceleration obtained only by the first free vibration system, and the disk is used for high-speed data transfer. An objective lens driving device capable of increasing the sensitivity to follow the displacement of the information recording track of the light spot in both the high-speed rotation frequency band of the disk and the low-speed rotation frequency band of the disk applied to music reproduction and the like. Things.
【図１】本発明の一実施の形態による対物レンズ駆動装
置の平面図FIG. 1 is a plan view of an objective lens driving device according to an embodiment of the present invention.
【図２】同実施の形態による対物レンズ駆動装置の斜視
図FIG. 2 is a perspective view of the objective lens driving device according to the embodiment;
【図３】従来の対物レンズ駆動装置の加速度周波数特性
の一例を示す図FIG. 3 is a diagram showing an example of an acceleration frequency characteristic of a conventional objective lens driving device.
【図４】一次共振周波数の上昇によってデータ転送の高
速化に対応した対物レンズ駆動装置の加速度周波数特性
の一例を示す図FIG. 4 is a diagram showing an example of an acceleration frequency characteristic of an objective lens driving device corresponding to an increase in data transfer speed due to an increase in a primary resonance frequency.
【図５】本発明の対物レンズ駆動装置の加速度周波数特
性の一例を示す図FIG. 5 is a diagram showing an example of an acceleration frequency characteristic of the objective lens driving device according to the present invention.
１ 対物レンズ ２ 対物レンズ保持部材 ３ フォーカシングコイル ４ トラッキングコイル １０ マグネット ６１ 第一の金属ワイヤ ６２ 第一の金属ワイヤ ７１ 中継部材 ７２ 固定部材 DESCRIPTION OF SYMBOLS 1 Objective lens 2 Objective lens holding member 3 Focusing coil 4 Tracking coil 10 Magnet 61 First metal wire 62 First metal wire 71 Relay member 72 Fixing member
Claims (1)
物レンズの光軸に平行なフォーカシング方向に駆動力を
発生するためのフォーカシングコイルと前記対物レンズ
の光軸に垂直なトラッキング方向に駆動力を発生するト
ラッキングコイルとが巻き付けられた対物レンズ保持部
材と、前記対物レンズ保持部材に一端が固定され、他端
が中継保持部材に固定された４本の第一の金属ワイヤ
と、前記中継保持部材に一端が固定され、他端が固定部
に固定された４本の第二の金属ワイヤと、前記第１の金
属ワイヤと第二の金属ワイヤを介して前記フォーカシン
グコイルおよびトラッキングコイルに電流を供給するこ
とによってローレンツ力による駆動力を発生させるため
の磁界を形成するように前記固定部に配置された磁気回
路部材とを有し、前記対物レンズ保持部材を前記第１の
金属ワイヤの弾性変形により移動可能に前記中継保持部
材で支持し、その中継保持部材を前記第２の金属ワイヤ
の弾性変形により移動可能に前記固定部で支持したこと
を特徴とする対物レンズ駆動装置。An objective lens is held, and a focusing coil for generating a driving force in a focusing direction parallel to an optical axis of the objective lens on an outer peripheral portion thereof, and a tracking coil perpendicular to the optical axis of the objective lens. An objective lens holding member around which a tracking coil for generating a force is wound; four first metal wires having one end fixed to the objective lens holding member and the other end fixed to a relay holding member; Current is supplied to the focusing coil and the tracking coil via four second metal wires, one end of which is fixed to the holding member and the other end of which is fixed to the fixing portion, and the first metal wire and the second metal wire. And a magnetic circuit member disposed on the fixed portion so as to form a magnetic field for generating a driving force by Lorentz force by supplying An objective lens holding member is movably supported by the relay holding member by elastic deformation of the first metal wire, and the relay holding member is movably supported by the fixing portion by elastic deformation of the second metal wire. An objective lens driving device, characterized in that:
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03558698A JP3757603B2 (en) | 1998-02-18 | 1998-02-18 | Objective lens drive |
| US09/807,699 US6643073B1 (en) | 1998-02-18 | 1999-08-17 | Device for driving object lens |
| PCT/JP1999/004423 WO2001013368A1 (en) | 1998-02-18 | 1999-08-17 | Device for driving object lens |
| CNB998122661A CN1154988C (en) | 1998-02-18 | 1999-08-17 | Device for driving object lens |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03558698A JP3757603B2 (en) | 1998-02-18 | 1998-02-18 | Objective lens drive |
| PCT/JP1999/004423 WO2001013368A1 (en) | 1998-02-18 | 1999-08-17 | Device for driving object lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11232671A true JPH11232671A (en) | 1999-08-27 |
| JP3757603B2 JP3757603B2 (en) | 2006-03-22 |
Family
ID=26374572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03558698A Expired - Fee Related JP3757603B2 (en) | 1998-02-18 | 1998-02-18 | Objective lens drive |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3757603B2 (en) |
| CN (1) | CN1154988C (en) |
| WO (1) | WO2001013368A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001013368A1 (en) * | 1998-02-18 | 2001-02-22 | Matsushita Electric Industrial Co., Ltd. | Device for driving object lens |
| KR100361498B1 (en) * | 2000-07-13 | 2002-11-18 | 엘지전자 주식회사 | Supporting structure of actuator for tilting drive |
| US6643073B1 (en) | 1998-02-18 | 2003-11-04 | Matsushita Electric Industrial Co., Ltd. | Device for driving object lens |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100382992C (en) * | 2004-06-02 | 2008-04-23 | 陈福礽 | Magnetic boot module |
| CN101017233A (en) * | 2006-02-08 | 2007-08-15 | 鑫视科技股份有限公司 | Camera lens module having parallel driving suspension device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0612578B2 (en) * | 1985-01-25 | 1994-02-16 | 株式会社日立製作所 | Optical scanning device |
| JPH03100934A (en) * | 1989-09-13 | 1991-04-25 | Mitsubishi Electric Corp | Objective lens driving device |
| JP3757603B2 (en) * | 1998-02-18 | 2006-03-22 | 松下電器産業株式会社 | Objective lens drive |
-
1998
- 1998-02-18 JP JP03558698A patent/JP3757603B2/en not_active Expired - Fee Related
-
1999
- 1999-08-17 CN CNB998122661A patent/CN1154988C/en not_active Expired - Fee Related
- 1999-08-17 WO PCT/JP1999/004423 patent/WO2001013368A1/en active IP Right Grant
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001013368A1 (en) * | 1998-02-18 | 2001-02-22 | Matsushita Electric Industrial Co., Ltd. | Device for driving object lens |
| US6643073B1 (en) | 1998-02-18 | 2003-11-04 | Matsushita Electric Industrial Co., Ltd. | Device for driving object lens |
| KR100361498B1 (en) * | 2000-07-13 | 2002-11-18 | 엘지전자 주식회사 | Supporting structure of actuator for tilting drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3757603B2 (en) | 2006-03-22 |
| CN1154988C (en) | 2004-06-23 |
| WO2001013368A1 (en) | 2001-02-22 |
| CN1323437A (en) | 2001-11-21 |
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