JP2002245646A - Object lens driving device and optical disk device - Google Patents

Object lens driving device and optical disk device

Info

Publication number
JP2002245646A
JP2002245646A JP2001042678A JP2001042678A JP2002245646A JP 2002245646 A JP2002245646 A JP 2002245646A JP 2001042678 A JP2001042678 A JP 2001042678A JP 2001042678 A JP2001042678 A JP 2001042678A JP 2002245646 A JP2002245646 A JP 2002245646A
Authority
JP
Japan
Prior art keywords
objective lens
support members
fixed
driving device
lens driving
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
Application number
JP2001042678A
Other languages
Japanese (ja)
Other versions
JP3583074B2 (en
Inventor
Katsuhiko Kimura
勝彦 木村
Mitsuo Satake
光雄 佐竹
Tetsuo Ito
徹雄 伊東
Shuji Takahashi
修治 高橋
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.)
Hitachi Ltd
Hitachi Media Electronics Co Ltd
Original Assignee
Hitachi Ltd
Hitachi Media Electronics 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 Hitachi Ltd, Hitachi Media Electronics Co Ltd filed Critical Hitachi Ltd
Priority to JP2001042678A priority Critical patent/JP3583074B2/en
Publication of JP2002245646A publication Critical patent/JP2002245646A/en
Application granted granted Critical
Publication of JP3583074B2 publication Critical patent/JP3583074B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an object lens driving device which drives an object lens for condensing light onto the recording surface of an optical disk even in the tilt direction of the optical axis of the object lens in addition to the focusing direction and the tracking direction in order to perform excellent recording/ reproducing in the optical disk device made high in density. SOLUTION: In the object lens driving device, four linear supporting members are fixedly inserted into a hole provided in the side surface of a lens holder, and two supporting members, each in which a coil shaped part or a bending part is provided at its middle part, are fixed to a groove provided in the side surface of the lens holder. Also, two supporting members, which are fixed along the groove provided in the side surface of the lens holder, are fixed to the side nearer to the object lens than the center of the fixed position of four linear supporting members in the direction of the optical axis of the object lens.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、光ディスクの記録
面に光を集光する対物レンズを、フォーカシング方向と
トラッキング方向と対物レンズの光軸の傾き方向に駆動
する対物レンズ駆動装置および光ディスク装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an objective lens driving device for driving an objective lens for condensing light on a recording surface of an optical disk in a focusing direction, a tracking direction, and a tilt direction of an optical axis of the objective lens, and an optical disk device. .

【0002】[0002]

【従来の技術】高密度化が進む光ディスク装置において
良好な記録再生を行うために、光ディスクの記録面に光
を集光する対物レンズを、フォーカシング方向とトラッ
キング方向に加えて、対物レンズの光軸の傾き方向にも
駆動し、光ディスクの傾きに対しても補正する対物レン
ズ駆動装置が求められている。このような対物レンズ駆
動装置としては、例えば特開平6−162540号公報
に開示されている。
2. Description of the Related Art In order to perform good recording / reproduction in an optical disk device with a high density, an objective lens for condensing light on a recording surface of an optical disk is added to a focusing direction and a tracking direction, and an optical axis of the objective lens is provided. There is a demand for an objective lens driving device that also drives in the tilt direction of the optical disk and corrects the tilt of the optical disk. Such an objective lens driving device is disclosed in, for example, JP-A-6-162540.

【0003】特開平6−162540号公報によれば、
対物レンズホルダーを傾動可能に支持する支持材は、8
本の平行な直線形状とし、一端を対物レンズホルダーの
側面に、他端は基台の支持固定部に固着し、可動部をフ
ォーカス方向、トラッキング方向、傾き方向の3方向に
移動および傾動可能に支持している。また、上記8本の
支持材は、4本の直線状の弾性体からなる支持材を、対
物レンズホルダー側面とこの対物レンズホルダーを情報
記録媒体の周方向に挟むように配置された支持材固定部
とに固定後、対物レンズホルダー側面中央にて切断する
ことにより構成されている。
According to JP-A-6-162540,
The supporting material for tiltably supporting the objective lens holder is 8
A parallel linear shape with one end fixed to the side of the objective lens holder and the other end fixed to the supporting and fixing part of the base, so that the movable part can be moved and tilted in three directions: focus direction, tracking direction and tilt direction I support it. In addition, the eight support members are formed by fixing four support members made of a linear elastic body to a side of the objective lens holder and a support member arranged so as to sandwich the objective lens holder in the circumferential direction of the information recording medium. It is configured by cutting at the center of the side of the objective lens holder after fixing to the part.

【0004】[0004]

【発明が解決しようとする課題】光ディスク装置におい
て、対物レンズで集光された光をフォーカシング方向と
トラッキング方向および対物レンズの光軸の傾き方向に
高速・高精度に、なおかつ低消費電力で位置決めするた
めには、対物レンズ駆動装置の各方向への動作感度を高
める必要がある。
SUMMARY OF THE INVENTION In an optical disc apparatus, light condensed by an objective lens is positioned at high speed, with high accuracy, and with low power consumption in a focusing direction, a tracking direction, and a tilt direction of an optical axis of the objective lens. For this purpose, it is necessary to increase the operation sensitivity of the objective lens driving device in each direction.

【0005】対物レンズの光軸の傾き方向への静的な動
作感度Stは、駆動電圧Vを印加したときに、対物レン
ズを含む可動部を固定部に対して支持する支持部材の中
心回りに作用するモーメントをM、各支持部材のばね定
数をki、支持部材の中心から各支持部材の固定位置ま
での距離をLiとすると、
[0005] The static operation sensitivity St of the objective lens in the direction of inclination of the optical axis is such that when the driving voltage V is applied, the movable member including the objective lens is supported around the center of the support member that supports the movable portion with respect to the fixed portion. Assuming that the acting moment is M, the spring constant of each support member is ki, and the distance from the center of the support member to the fixed position of each support member is Li,

【0006】[0006]

【数1】 と表される。ここで添字のiは複数本の支持部材の何番
目かを示す。この式から、傾き方向への動作感度を高め
るためには、支持部材の中心回りに作用するモーメント
を大きくするのは当然として、支持部材のばね定数を小
さくすることと、支持部材の中心から各支持部材の固定
位置までの距離を小さくすることが必要である。
(Equation 1) It is expressed as Here, the subscript i indicates the order of the plurality of support members. From this equation, in order to increase the operation sensitivity in the tilt direction, it is natural that the moment acting around the center of the support member is increased, the spring constant of the support member is reduced, It is necessary to reduce the distance to the fixing position of the support member.

【0007】しかし、上記特開平6−162540号公
報では、8本の直線状の支持部材がレンズホルダの側面
に固着されており、支持部材の中心から各支持部材の固
定位置までの距離が大きく、動作感度の向上という点に
関しては必ずしも十分とは言えない。また、4本の直線
状の弾性体からなる支持材を、対物レンズホルダー側面
とこの対物レンズホルダーを情報記録媒体の周方向に挟
むように配置された支持材固定部とに固定後、対物レン
ズホルダー側面中央にて切断し8本の支持材とすること
は、切断作業が増えコストが高くなるという問題があっ
た。
However, in Japanese Patent Application Laid-Open No. 6-162540, eight linear support members are fixed to the side surface of the lens holder, and the distance from the center of the support member to the fixing position of each support member is large. However, the improvement of the operation sensitivity is not always sufficient. After fixing the support made of four linear elastic bodies to the side surface of the objective lens holder and a support fixing portion arranged so as to sandwich the objective lens holder in the circumferential direction of the information recording medium, the objective lens Cutting at the center of the side of the holder into eight support members has a problem that the number of cutting operations increases and the cost increases.

【0008】本発明はこのような点に鑑み、対物レンズ
で集光された光をフォーカシング方向とトラッキング方
向および対物レンズの光軸の傾き方向に駆動制御する場
合に、動作感度の向上と組立作業性の向上を図った対物
レンズ駆動装置を提供することを目的とする。
In view of the foregoing, the present invention improves the operational sensitivity and assembles the light when the light condensed by the objective lens is driven and controlled in the focusing direction, the tracking direction, and the inclination direction of the optical axis of the objective lens. It is an object of the present invention to provide an objective lens driving device with improved operability.

【0009】[0009]

【課題を解決するための手段】上記目的を達成するため
に本発明の対物レンズ駆動装置は、対物レンズを保持す
るレンズホルダを含む可動部を固定部に対してフォーカ
シング方向とトラッキング方向と対物レンズの光軸の傾
き方向に動作可能に支持する直線状の4本の支持部材
と、中間にコイル形状部もしくは屈曲部を設けた2本の
支持部材とを有し、直線状の4本の支持部材はレンズホ
ルダの側面に設けた穴に挿入して固定し、中間にコイル
形状部もしくは屈曲部を設けた2本の支持部材は前記レ
ンズホルダの側面に設けた固定溝にて固定した構成とし
た。
In order to achieve the above object, an objective lens driving apparatus according to the present invention comprises a movable part including a lens holder for holding an objective lens, a focusing part, a tracking direction, and an objective lens. Four linear support members having four linear support members operably supported in the direction of inclination of the optical axis and two support members provided with a coil-shaped portion or a bent portion in the middle. The member is inserted and fixed in a hole provided on the side surface of the lens holder, and two support members provided with a coil-shaped portion or a bent portion in the middle are fixed by fixing grooves provided on the side surface of the lens holder. did.

【0010】また、レンズホルダの側面に設けた固定溝
に固定した2本の支持部材を、対物レンズの光軸方向に
おいて、直線状の4本の支持部材の固定位置の中心より
も対物レンズに近い側で固定する構成とした。以上のよ
うに2本の支持部材の中間にコイル形状部もしくは屈曲
部を設けることで、支持部材のばね定数を小さくするこ
とができ、傾き方向の動作感度の向上が図れる。また、
前記中間にコイル形状部もしくは屈曲部を設けた2本の
支持部材を、前記レンズホルダの側面に設けた溝に沿わ
せて固定することにより、支持部材の組立作業性を向上
することができる。さらに、中間にコイル形状部もしく
は屈曲部を設けた2本の支持部材の固定位置を、直線状
の4本の支持部材の固定位置の中心よりも対物レンズに
近い側にすることで、支持部材の支持中心と可動部の重
心を近接させることができるので、静的にも動的にもバ
ランスのとれた対物レンズ駆動装置を実現できる。
[0010] Further, two support members fixed to the fixing grooves provided on the side surface of the lens holder are arranged closer to the objective lens than the center of the fixed position of the four linear support members in the optical axis direction of the objective lens. It was configured to be fixed on the near side. By providing the coil-shaped portion or the bent portion between the two support members as described above, the spring constant of the support member can be reduced, and the operation sensitivity in the tilt direction can be improved. Also,
By fixing the two support members provided with the coil-shaped portions or the bent portions in the middle along the grooves provided on the side surfaces of the lens holder, the workability of assembling the support members can be improved. Further, the fixing position of the two supporting members provided with the coil-shaped portion or the bent portion in the middle is closer to the objective lens than the center of the fixing positions of the four linear supporting members, so that the supporting member is The center of gravity of the movable part can be made close to the center of support of the movable part, so that an objective lens driving device that is statically and dynamically balanced can be realized.

【0011】[0011]

【発明の実施の形態】以下、本発明の実施例を、図面を
用いて説明する。図1は本発明の対物レンズ駆動装置の
構成を示す斜視図である。対物レンズ1を保持するレン
ズホルダ2には、2個のフォーカシングコイル3と4個
のトラッキングコイル4及び2個の傾き動作用コイル1
1が取り付けられる。フォーカシングコイル3と傾き動
作用コイル11は上下に並んで配設されている。ここで
は、フォーカシングコイル3を上に、傾き動作用コイル
11を下に示したが、上下逆でも構わない。対物レンズ
1とレンズホルダ2とフォーカシングコイル3とトラッ
キングコイル4及び傾き動作用コイル11が可動部5と
なる。直線状の4本の支持部材6a、6b、6c、6d
は、一端をレンズホルダ2の外縁部に固定し、他端を固
定部7に固定する。2本の支持部材6e、6fは、中間
に屈曲部を有しており、一端をレンズホルダ2に他端を
固定部7に固定する。この6本の支持部材6a、6b、
6c、6d、6e、6fにより可動部5を固定部7に対
して動作可能に支持している。永久磁石8は、対物レン
ズ1の両側に位置するフォーカシングコイル3とトラッ
キングコイル4および傾き動作用コイル11を挟むよう
に相対向し、磁性体から成るヨーク9に固着される。ヨ
ーク9の底面からはインナーヨーク10が、フォーカシ
ングコイル3と傾き動作用コイル11の内側に位置する
よう設けられる。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the configuration of the objective lens driving device of the present invention. A lens holder 2 for holding the objective lens 1 includes two focusing coils 3, four tracking coils 4, and two tilt operation coils 1.
1 is attached. The focusing coil 3 and the tilt operation coil 11 are arranged vertically. Here, the focusing coil 3 is shown above and the tilting coil 11 is shown below, but it may be upside down. The movable part 5 includes the objective lens 1, the lens holder 2, the focusing coil 3, the tracking coil 4, and the tilt operation coil 11. Four linear support members 6a, 6b, 6c, 6d
Has one end fixed to the outer edge of the lens holder 2 and the other end fixed to the fixing part 7. The two support members 6e and 6f have a bent portion in the middle, and fix one end to the lens holder 2 and the other end to the fixing portion 7. These six support members 6a, 6b,
The movable portion 5 is operably supported by the fixed portion 7 by 6c, 6d, 6e, and 6f. The permanent magnet 8 opposes the focusing coil 3 and the tracking coil 4 and the tilting coil 11 located on both sides of the objective lens 1 and is fixed to a yoke 9 made of a magnetic material. An inner yoke 10 is provided from the bottom surface of the yoke 9 so as to be located inside the focusing coil 3 and the tilt operation coil 11.

【0012】対物レンズ駆動装置の駆動は次のように行
う。2個のフォーカシングコイル3には、永久磁石8か
らの磁束との作用により生じる電磁力が同方向となるよ
うに駆動電流を印加し、可動部5を対物レンズ1の光軸
方向であるフォーカシング方向に駆動する。また、2個
の傾き動作用コイル11には、永久磁石8からの磁束と
の作用により生じる電磁力が逆方向となるように駆動電
流を印加する。それにより、可動部5を6本の支持部材
の剛性バランスで決まる支持中心の回りに回転駆動す
る。また、4個のトラッキングコイル4には、永久磁石
8からの磁束との作用により生じる電磁力が同方向とな
るように駆動電流を印加し、可動部5を光ディスクの半
径方向であるトラッキング方向に駆動する。
The driving of the objective lens driving device is performed as follows. A drive current is applied to the two focusing coils 3 so that the electromagnetic force generated by the action of the magnetic flux from the permanent magnet 8 is in the same direction, and the movable part 5 is moved in the focusing direction which is the optical axis direction of the objective lens 1. Drive. A drive current is applied to the two tilt operation coils 11 so that the electromagnetic force generated by the action of the magnetic flux from the permanent magnet 8 is in the opposite direction. Thereby, the movable part 5 is driven to rotate around the support center determined by the rigidity balance of the six support members. Also, a drive current is applied to the four tracking coils 4 so that the electromagnetic force generated by the action of the magnetic flux from the permanent magnet 8 is in the same direction, and the movable part 5 is moved in the tracking direction, which is the radial direction of the optical disk. Drive.

【0013】ここで、6本の支持部材6a、6b、6
c、6d、6e、6fの取付方法について図2を用いて
説明する。直線状の4本の支持部材6a、6b、6c、
6dは、レンズホルダ2の外縁部に設けた穴12a、1
2b、12c、12dと固定部7に設けた穴17a、1
7b、17c、17dに挿入し、接着剤あるいは半田な
どによりレンズホルダ2と固定部7に固定する。ここで
は支持部材6a、6b、6c、6dをレンズホルダ2側
から固定部7へ向かって挿入しているが、固定部7側か
らレンズホルダ2へ向かって挿入してももちろん構わな
い。中間に屈曲部を有する2本の支持部材6e、6f
は、固定部側を固定部7に設けた穴17e、17fに挿
入し、レンズホルダ側をレンズホルダ2の側面に設けた
溝13e、13fに沿わせるように位置決めし、接着剤
あるいは半田などによりレンズホルダ2と固定部7に固
定する。なお、6本の支持部材6a、6b、6c、6
d、6e、6fは、図示はしていないが、フォーカシン
グコイル3とトラッキングコイル4と傾き動作用コイル
11と半田などにより電気的に接続される。なお、6本
全ての支持部材を導電部材で形成する必要はなく、少な
くともレンズ中心を通る線に対して対称に配置された支
持部材のうち2本の支持部材が導電部材で形成されてい
ればよい。すなわち、ばね作用が左右で略均等になるよ
うに導電部材で形成された支持部材が配置されていれば
良い。
Here, six support members 6a, 6b, 6
The mounting method of c, 6d, 6e, 6f will be described with reference to FIG. Four linear support members 6a, 6b, 6c;
6d are holes 12a, 1 provided in the outer edge of the lens holder 2.
2b, 12c, 12d and holes 17a, 1
7b, 17c, and 17d, and fixed to the lens holder 2 and the fixing portion 7 with an adhesive or solder. Here, the support members 6a, 6b, 6c, and 6d are inserted from the lens holder 2 side toward the fixing unit 7, but may be inserted from the fixing unit 7 side toward the lens holder 2. Two support members 6e and 6f having a bent portion in the middle
Is inserted into the holes 17e, 17f provided on the fixing portion 7 on the fixing portion 7 and the lens holder side is positioned along the grooves 13e, 13f provided on the side surface of the lens holder 2, and is fixed with an adhesive or solder. It is fixed to the lens holder 2 and the fixing part 7. The six support members 6a, 6b, 6c, 6
Although not shown, d, 6e, and 6f are electrically connected to the focusing coil 3, the tracking coil 4, the tilt operation coil 11, and solder. It is not necessary to form all six support members with conductive members, provided that at least two of the support members arranged symmetrically with respect to a line passing through the center of the lens are formed of conductive members. Good. That is, a support member formed of a conductive member may be disposed so that the spring action is substantially equal on the left and right.

【0014】本実施例のように2本の支持部材6e、6
fの中間に屈曲部を設けることで、支持部材6e、6f
の全長を長くでき、ばね定数を小さくすることができ
る。前述のように、傾き方向の動作感度は支持部材のば
ね定数に反比例となるので、支持部材6e、6fの中間
に屈曲部を設けることにより傾き方向の動作感度を向上
することができる。
As in this embodiment, two support members 6e and 6
The support members 6e, 6f
Can be lengthened, and the spring constant can be reduced. As described above, since the operation sensitivity in the tilt direction is inversely proportional to the spring constant of the support member, the operation sensitivity in the tilt direction can be improved by providing a bent portion between the support members 6e and 6f.

【0015】また、中間に屈曲部を設けた支持部材6
e、6fを、レンズホルダ2と固定部7の両方共に穴に
挿入して固定しようとすると、どちらか一方へ支持部材
6e、6fを深く挿入し、もう一方へ折り返すようにし
て挿入する必要があり、作業が困難になる。これに対し
て本実施例では、レンズホルダ2への支持部材6e、6
fの固定は、レンズホルダ2の側面に設けた溝13e、
13fに沿わせて行うため、支持部材を折り返す必要が
無く、作業が容易になる。
A supporting member 6 having a bent portion in the middle
In order to insert and fix both the lens holders e and 6f into the holes of both the lens holder 2 and the fixing portion 7, it is necessary to insert the supporting members 6e and 6f deeply into one of them and bend back to the other. Yes, making work difficult. On the other hand, in this embodiment, the support members 6e and 6
f is fixed by grooves 13e provided on the side surface of the lens holder 2,
Since the operation is performed along 13f, there is no need to turn back the support member, and the operation is facilitated.

【0016】さらに本実施例では、レンズホルダ2の側
面に設けた溝13e、13fに沿わせて固定した2本の
支持部材6e、6fの固定位置を、図3に示すように、
対物レンズ1の光軸方向において、直線状の4本の支持
部材6a、6b、6c、6dの固定位置の中心よりも対
物レンズ1に近い側としている。これにより、6本の支
持部材6a、6b、6c、6d、6e、6fの剛性バラ
ンスで決まる支持中心を対物レンズ1に近づけることが
できる。図3のように、対物レンズ1をレンズホルダ2
の上部に取り付けた場合は、可動部5の重心は4本の支
持部材6a、6b、6c、6dの固定位置の中心よりも
対物レンズ1側にある。従って、本構成により支持中心
と可動部5の重心を近接させることが可能となり、静的
にも動的にもバランスのとれた対物レンズ駆動装置を実
現できる。
Further, in this embodiment, the fixing positions of the two support members 6e and 6f fixed along the grooves 13e and 13f provided on the side surface of the lens holder 2 are as shown in FIG.
In the optical axis direction of the objective lens 1, it is closer to the objective lens 1 than the center of the fixed position of the four linear support members 6a, 6b, 6c, 6d. Thereby, the support center determined by the rigidity balance of the six support members 6a, 6b, 6c, 6d, 6e, 6f can be brought closer to the objective lens 1. As shown in FIG. 3, the objective lens 1 is
Is mounted on the objective lens 1 with respect to the center of the fixed position of the four support members 6a, 6b, 6c, 6d. Therefore, with this configuration, the center of support and the center of gravity of the movable portion 5 can be brought close to each other, and an objective lens driving device that is statically and dynamically balanced can be realized.

【0017】なお、レンズホルダ2の下部にバランスウ
エイトなどを取り付けて、可動部5の重心が4本の支持
部材6a、6b、6c、6dの固定位置の中心に対して
対物レンズ1と反対側になる場合には、支持部材6e、
6fの固定位置を、対物レンズ1の光軸方向において、
4本の支持部材6a、6b、6c、6dの固定位置の中
心に対して対物レンズ1と反対側とすれば良い。いずれ
の場合も、支持部材6e、6fの固定位置を、対物レン
ズ1の光軸方向において、4本の支持部材6a、6b、
6c、6dの固定位置の中心に対して可動部5の重心に
近い側とすれば良い。
A balance weight or the like is attached to the lower part of the lens holder 2 so that the center of gravity of the movable part 5 is on the opposite side of the center of the fixed position of the four support members 6a, 6b, 6c, 6d from the objective lens 1. When it becomes, the support member 6e,
6f in the optical axis direction of the objective lens 1
What is necessary is just to make it the side opposite to the objective lens 1 with respect to the center of the fixed position of four support members 6a, 6b, 6c, 6d. In any case, the fixing positions of the support members 6e, 6f are changed in the optical axis direction of the objective lens 1 by the four support members 6a, 6b,
What is necessary is just to set it as the side near the center of gravity of the movable part 5 with respect to the center of the fixed position of 6c, 6d.

【0018】次に、本発明の他の実施例を図4に示す。
本実施例では、第1の実施例における支持部材6e、6
fを、中間にコイル形状部を有する支持部材16e、1
6fとしたものである。このように支持部材16e、1
6fの中間にコイル形状部を設けることで、ばね定数を
さらに小さくすることができ、傾き方向の動作感度を向
上することができる。その他の構成および効果について
は第1の実施例と同様である。
Next, another embodiment of the present invention is shown in FIG.
In this embodiment, the support members 6e, 6
f, supporting members 16e, 1
6f. Thus, the support members 16e, 1
By providing the coil-shaped portion in the middle of 6f, the spring constant can be further reduced, and the operating sensitivity in the tilt direction can be improved. Other configurations and effects are the same as those of the first embodiment.

【0019】図5に前述の対物レンズ駆動装置を用した
光ディスク装置の斜視図を示す。ディスク装置は、円盤
状の情報記録媒体であるディスク51を装置内へ搬送
し、その後、スピンドルモータ52の回転軸に設けられ
たターンテーブルへ搭載し、その後固定するディスクロ
ーディング機構を備えている。このディスクローディン
グ機構は、ディスクトレー61と、図示していないロー
ディング用モータと、モータの駆動力を伝達するギア
と、駆動力伝達部材およびディスク51をスピンドルモ
ータ52のターンテーブルに固定するディスククランパ
53によって構成されている。ディスクローディング動
作は、まず、ディスク51を装置内に搬入あるいは、装
置外に搬出するため、搬送時にディスク1を載せるディ
スクトレー61を装置のフロントパネル60に設けた搬
入出孔より出し入れする動作がある。さらに、装置内に
搬入されたディスク1をスピンドルモータ52のターン
テーブルに搭載し、トップカバー58のディスク51に
対面する面に備えているディスククランパ53により固
定するため、スピンドルモータ52、ディスク51の情
報を再生あるいは記録再生する光ヘッド54と、これら
を保持しているユニットメカシャシ55を一体的に上下
昇降させる動作とからなる。ディスク51がスピンドル
モータ52に固定されると、スピンドルモータ52は規
定の回転数で回転し、ユニットメカシャシ55に備えた
前記光ヘッド54により、ディスク51に記録された情
報の再生を行ったり、またはディスク51に情報を記録
する。
FIG. 5 is a perspective view of an optical disk device using the above-described objective lens driving device. The disk device includes a disk loading mechanism that transports a disk 51, which is a disc-shaped information recording medium, into the device, and then mounts the disk 51 on a turntable provided on a rotation shaft of a spindle motor 52, and then fixes the disk. The disk loading mechanism includes a disk tray 61, a loading motor (not shown), a gear for transmitting the driving force of the motor, a driving force transmitting member, and a disk clamper 53 for fixing the disk 51 to a turntable of the spindle motor 52. It is constituted by. In the disk loading operation, first, in order to carry the disk 51 into or out of the apparatus, there is an operation in which the disk tray 61 on which the disk 1 is loaded is taken in and out through a carry-in / out hole provided in the front panel 60 of the apparatus. . Further, the disc 1 loaded into the apparatus is mounted on a turntable of a spindle motor 52 and fixed by a disc clamper 53 provided on a surface of the top cover 58 facing the disc 51. The operation includes an optical head 54 for reproducing or recording / reproducing information, and an operation of vertically moving up and down the unit mechanical chassis 55 holding them. When the disk 51 is fixed to the spindle motor 52, the spindle motor 52 rotates at a specified number of revolutions, and reproduces information recorded on the disk 51 by the optical head 54 provided in the unit mechanical chassis 55, Alternatively, information is recorded on the disk 51.

【0020】この光ヘッド54は、ディスク51の方向
にレンズを移動させる駆動手段に加え、半径方向に移動
させる駆動手段を備えている。また、ユニットメカシャ
シ55には、スピンドルモータ52や、前記光ヘッド5
4が取付けられている。装置外部からユニットメカシャ
シ55に伝わる振動や衝撃は、インシュレータ56a、
b、c、d(弾性部材)により減衰される。ユニットメ
カシャシ5は、このインシュレータ56a、b、c、d
を介して図示していないユニットホルダーに取り付けら
れている。さらに、前記ユニットホルダーはメカベース
57部に嵌合結合している。このメカベース部57の下
には、スピンドルモータ等の制御を行う回路基板が取付
けられ、その外側はボトムカバーで覆われる構成となっ
ている。ディスク装置は、ボトムカバー59及びトップ
カバー58が取り付けられた状態でコンピュータ装置等
に組み込まれるよう構成されている。
The optical head 54 has a driving means for moving the lens in the radial direction in addition to a driving means for moving the lens in the direction of the disk 51. The unit mechanical chassis 55 includes the spindle motor 52 and the optical head 5.
4 are attached. Vibrations and shocks transmitted from the outside of the device to the unit mechanical chassis 55 are transmitted to the insulator 56a,
Damped by b, c, d (elastic members). The unit mechanical chassis 5 includes the insulators 56a, b, c, and d.
Through a unit holder (not shown). Further, the unit holder is fitted and connected to the mechanical base 57. A circuit board for controlling a spindle motor and the like is attached below the mechanical base 57, and the outside thereof is covered with a bottom cover. The disk device is configured to be incorporated in a computer device or the like with the bottom cover 59 and the top cover 58 attached.

【0021】光ヘッド54を駆動し、情報の読み出し又
は書込みを行う時に、対物レンズを駆動して、光ディス
ク面上の情報記録一に焦点を合す必要が有るが、その時
にレンズが傾いたり、また、変形したディスク面となっ
ている時には、レンズ自体を傾き制御行う必要が有る。
そのため、先の実施例で述べた対物レンズ駆動装置を適
用することで、高速にしかも高精度に位置合わせが可能
となる。
When the optical head 54 is driven to read or write information, it is necessary to drive the objective lens to focus on the information recording on the optical disk surface. When the disk surface is deformed, it is necessary to control the tilt of the lens itself.
Therefore, by applying the objective lens driving device described in the previous embodiment, high-speed and high-accuracy positioning can be performed.

【0022】[0022]

【発明の効果】このように本発明によれば、2本の支持
部材の中間にコイル形状部もしくは屈曲部を設けること
で、支持部材のばね定数を小さくすることができ、傾き
方向の動作感度の向上が図れる。また、中間にコイル形
状部もしくは屈曲部を設けた2本の支持部材を、レンズ
ホルダの側面に設けた溝に沿わせて固定することによ
り、支持部材の組立作業性を向上することができる。さ
らに、中間にコイル形状部もしくは屈曲部を設けた2本
の支持部材の固定位置を、直線状の4本の支持部材の固
定位置の中心よりも対物レンズに近い側にすることで、
支持部材の支持中心と可動部の重心を近接させることが
できるので、静的にも動的にもバランスのとれた対物レ
ンズ駆動装置を実現できる。
As described above, according to the present invention, by providing a coil-shaped portion or a bent portion between two support members, the spring constant of the support member can be reduced, and the operation sensitivity in the tilt direction can be reduced. Can be improved. Further, by fixing two support members provided with a coil-shaped portion or a bent portion in the middle along a groove provided on the side surface of the lens holder, the assembling workability of the support member can be improved. Furthermore, by setting the fixed position of the two support members provided with the coil-shaped portion or the bent portion in the middle closer to the objective lens than the center of the fixed position of the four linear support members,
Since the center of support of the supporting member and the center of gravity of the movable part can be brought close to each other, an objective lens driving device that is statically and dynamically balanced can be realized.

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

【図1】本発明の対物レンズ駆動装置の実施例を示す図
である。
FIG. 1 is a diagram showing an embodiment of an objective lens driving device according to the present invention.

【図2】本発明の実施例における支持部材の取付方法を
示す図である。
FIG. 2 is a diagram illustrating a method of attaching a support member according to an embodiment of the present invention.

【図3】本発明の実施例における支持部材の取付位置を
示す図である。
FIG. 3 is a diagram illustrating a mounting position of a support member according to the embodiment of the present invention.

【図4】本発明の他の実施例を示す図である。FIG. 4 is a diagram showing another embodiment of the present invention.

【図5】本発明の対物レンズ駆動装置を適用した光ディ
スク装置の斜視図である。
FIG. 5 is a perspective view of an optical disk device to which the objective lens driving device according to the present invention is applied.

【符号の説明】[Explanation of symbols]

1…対物レンズ、2…レンズホルダ、3…フォーカシン
グコイル、4…トラッキングコイル、5…可動部、6
a、6b、6c、6d、6e、6f…支持部材、7…固
定部、8…永久磁石、9…ヨーク、10…インナーヨー
ク、11…傾き動作用コイル、12a、12b、12
c、12d…レンズホルダに設けた穴、12e、12f
…レンズホルダに設けた溝、17a、17b、17c、
17d…固定部に設けた穴。
DESCRIPTION OF SYMBOLS 1 ... Objective lens, 2 ... Lens holder, 3 ... Focusing coil, 4 ... Tracking coil, 5 ... Moving part, 6
a, 6b, 6c, 6d, 6e, 6f: support member, 7: fixing portion, 8: permanent magnet, 9: yoke, 10: inner yoke, 11: coil for tilting operation, 12a, 12b, 12
c, 12d: holes provided in the lens holder, 12e, 12f
... grooves provided in the lens holder, 17a, 17b, 17c,
17d: holes provided in the fixing portion.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐竹 光雄 岩手県水沢市真城字北野1番地 株式会社 日立メディアエレクトロニクス内 (72)発明者 伊東 徹雄 神奈川県横浜市戸塚区吉田町292番地 株 式会社日立画像情報システム内 (72)発明者 高橋 修治 岩手県水沢市真城字北野1番地 株式会社 日立メディアエレクトロニクス内 Fターム(参考) 5D118 AA06 AA13 BA01 DC03 EA02 EF07 FA30 FB10 FB12 FB20 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Mitsuo Satake, 1 Kitano, Makino, Mizusawa-shi, Iwate Prefecture Inside Hitachi Media Electronics Co., Ltd. (72) Tetsuo Ito 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Japan Hitachi Image Information System (72) Inventor Shuji Takahashi 1 Kitano, Majo, Mizusawa-shi, Iwate F-term in Hitachi Media Electronics Co., Ltd. 5D118 AA06 AA13 BA01 DC03 EA02 EF07 FA30 FB10 FB12 FB20

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】光ディスクの記録面に光を集光する対物レ
ンズと、前記対物レンズを保持するレンズホルダと、前
記レンズホルダを含む可動部を固定部に対してフォーカ
シング方向とトラッキング方向と前記対物レンズの光軸
の傾き方向に動作可能に支持する直線状の4本の支持部
材と、中間にコイル形状部もしくは屈曲部を設けた2本
の支持部材とを有し、前記レンズホルダの側面に前記直
線状の4本の支持部材を固定する貫通孔と、前記中間に
コイル形状部もしくは屈曲部を設けた2本の支持部材を
固定する溝を設けたことを特徴とする対物レンズ駆動装
置。
1. An objective lens for condensing light on a recording surface of an optical disk, a lens holder for holding the objective lens, and a movable part including the lens holder being fixed to a fixed part in a focusing direction, a tracking direction, and the objective part. It has four linear support members that are operably supported in the direction of inclination of the optical axis of the lens, and two support members that are provided with a coil-shaped portion or a bent portion in the middle. An objective lens driving device comprising: a through hole for fixing the four linear support members; and a groove for fixing two support members having a coil-shaped portion or a bent portion in the middle.
【請求項2】請求項1に記載の対物レンズ駆動装置にお
いて、前記レンズホルダの側面に設けた溝に沿わせて固
定した2本の支持部材を、前記対物レンズの光軸方向に
おいて、前記直線状の4本の支持部材の固定位置の中心
よりも前記対物レンズに近い側で固定することを特徴と
する対物レンズ駆動装置。
2. The objective lens driving device according to claim 1, wherein two support members fixed along a groove provided on a side surface of the lens holder are connected to the straight line in the optical axis direction of the objective lens. An objective lens driving device, wherein the four supporting members are fixed on a side closer to the objective lens than a center of a fixing position of the four supporting members.
【請求項3】請求項1に記載の対物レンズ駆動装置にお
いて、前記レンズホルダの側面に設けた溝に沿わせて固
定した2本の支持部材を、前記対物レンズの光軸方向に
おいて、前記直線状の4本の支持部材の固定位置の中心
よりも前記可動部の重心に近い側で固定することを特徴
とする対物レンズ駆動装置。
3. The objective lens driving device according to claim 1, wherein two support members fixed along a groove provided on a side surface of the lens holder are connected to the straight line in the optical axis direction of the objective lens. An objective lens driving device, wherein the fixed portion is fixed on a side closer to the center of gravity of the movable portion than the center of the fixed position of the four support members.
【請求項4】請求項1から3のいづれか1項に記載の対
物レンズ駆動装置において、少なくとも前記2本の支持
部材は導電部材で形成されていることを特徴とする対物
レンズ駆動装置。
4. The objective lens driving device according to claim 1, wherein at least the two support members are formed of a conductive member.
【請求項5】請求項1から4のいずれか1項に記載の対
物レンズ駆動装置を用いた光ディスク装置。
5. An optical disk device using the objective lens driving device according to claim 1.
JP2001042678A 2001-02-20 2001-02-20 Objective lens driving device and optical disk device Expired - Fee Related JP3583074B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001042678A JP3583074B2 (en) 2001-02-20 2001-02-20 Objective lens driving device and optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001042678A JP3583074B2 (en) 2001-02-20 2001-02-20 Objective lens driving device and optical disk device

Publications (2)

Publication Number Publication Date
JP2002245646A true JP2002245646A (en) 2002-08-30
JP3583074B2 JP3583074B2 (en) 2004-10-27

Family

ID=18904939

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP3583074B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005327378A (en) * 2004-05-14 2005-11-24 Sony Corp Optical pickup and optical disk system
JP2006134437A (en) * 2004-11-04 2006-05-25 Funai Electric Co Ltd Objective lens driving device
US7272840B2 (en) 2002-08-24 2007-09-18 Samsung Electronics Co., Ltd. Objective lens driving apparatus used with an optical pickup
US7768879B2 (en) 2006-04-28 2010-08-03 Sony Corporation Optical pickup and optical disk apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7272840B2 (en) 2002-08-24 2007-09-18 Samsung Electronics Co., Ltd. Objective lens driving apparatus used with an optical pickup
JP2005327378A (en) * 2004-05-14 2005-11-24 Sony Corp Optical pickup and optical disk system
JP4569166B2 (en) * 2004-05-14 2010-10-27 ソニー株式会社 Optical pickup and optical disk apparatus
JP2006134437A (en) * 2004-11-04 2006-05-25 Funai Electric Co Ltd Objective lens driving device
US7768879B2 (en) 2006-04-28 2010-08-03 Sony Corporation Optical pickup and optical disk apparatus

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