JP2003123289A - Device for supporting objective lens - Google Patents

Device for supporting objective lens

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Publication number
JP2003123289A
JP2003123289A JP2001315918A JP2001315918A JP2003123289A JP 2003123289 A JP2003123289 A JP 2003123289A JP 2001315918 A JP2001315918 A JP 2001315918A JP 2001315918 A JP2001315918 A JP 2001315918A JP 2003123289 A JP2003123289 A JP 2003123289A
Authority
JP
Japan
Prior art keywords
wire
objective lens
lens frame
elastic members
lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001315918A
Other languages
Japanese (ja)
Inventor
Tsutomu Matsui
勉 松井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Funai Electric Co Ltd
Original Assignee
Funai Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Funai Electric Co Ltd filed Critical Funai Electric Co Ltd
Priority to JP2001315918A priority Critical patent/JP2003123289A/en
Publication of JP2003123289A publication Critical patent/JP2003123289A/en
Pending legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an objective lens supporting device which hardly receives inertial force due to movement of the device itself is excellent in the fast followability of tracking and hardly causes displacement such as rolling and pitching. SOLUTION: In this objective lens supporting device, a lens frame 2 with an objective lens 21 attached thereto is supported by a supporting base body 3 with four wire-like elastic members W1a to W1d. Left and right wire-like elastic members W1a and W1b with each other among the wire-like elastic members W1a to W1d are arranged while gradually getting close to point parts of each other so as to be nonparallel and symmetrical with respect to a perpendicular plane that goes through the center of the objective lens and a turning center and are fixed to the supporting base body 3 and the lens frame 2. A point K of intersection on extending lines of the left and right wire-like elastic members is located between the center (S) of the objective lens and the rotation center of the lens frame.

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、コンパクトディス
ク(CD)、デジタルバーサタイルディスク(DVD)、レ
ーザディスク(LD)、光磁気ディスク(MO)、ミニ
ディスク(MD)などの光磁気ディスク等の記録媒体に対
して情報の記録または再生を行う光ピックアップの対物
レンズ駆動装置に用いられる対物レンズ支持装置に関す
る。
TECHNICAL FIELD The present invention relates to recording on a magneto-optical disk such as a compact disk (CD), a digital versatile disk (DVD), a laser disk (LD), a magneto-optical disk (MO) and a mini disk (MD). The present invention relates to an objective lens supporting device used in an objective lens driving device of an optical pickup that records or reproduces information on a medium.

【0002】[0002]

【従来の技術】従来から、たとえばコンパクトディスク
(CD)などのディスク型の媒体に記録されている情報
を光学的に読み出して電気信号として出力する光ピック
アップには、対物レンズ支持装置が設けられている。従
来における対物レンズ支持装置の構成は、軸摺動型と、
特開平3−54736号公報、特開平6−223393
号公報、特開平8−293123号公報、特開平293
124号公報、特開平10−312558号公報、特開
平11−167734号公報、特開平11−30656
0号公報、特開2000−76672号公報、特開20
01−34971号公報、特開2001−52357号
公報に示すようなワイヤ支持型に大別される。
2. Description of the Related Art Conventionally, an optical pickup for optically reading information recorded on a disc type medium such as a compact disc (CD) and outputting it as an electric signal is provided with an objective lens supporting device. There is. A conventional objective lens supporting device has a shaft sliding type,
JP-A-3-54736, JP-A-6-223393
Japanese Patent Laid-Open No. 8-293123, Japanese Patent Laid-Open No. 293123
No. 124, No. 10-31558, No. 11-167734, No. 11-30656.
No. 0, JP 2000-76672 A, JP 20
No. 01-34971 and Japanese Unexamined Patent Publication No. 2001-52357 are roughly classified into wire support types.

【0003】軸摺動型の対物レンズ支持装置は、対物レ
ンズがレンズ枠に取付けられ、レンズ枠の側面には駆動
コイルが装着されていると共に、対物レンズの光軸方向
に延びる摺動軸がレンズ枠に回動自在に挿通されてい
る。また、光ピックアップ本体側に摺動軸が固定されて
おり、摺動軸を中心としてレンズ枠を角変位させてトラ
ッキング用サーボ制御を行うようになっている。また、
レンズ枠の外周にはフォーカスコイルが設けられ、光ピ
ックアップ本体側に形成される1対のヨークに装着され
るフォーカス用磁石と作用して対物レンズを軸方向にス
ライドさせてフォーカス調整を行う。また、レンズ枠の
外周にはフォーカスコイルに直交するように巻かれた1
対のトラッキングコイルが設けられ、光ピックアップ本
体側に形成される1対のヨークに装着されるトラッキン
グ用磁石と作用して対物レンズを摺動軸を中心に所定角
度回転させて対物レンズのトラッキング調整を行うよう
になっている。
In an axial-sliding type objective lens supporting device, an objective lens is attached to a lens frame, a drive coil is attached to the side surface of the lens frame, and a sliding shaft extending in the optical axis direction of the objective lens is provided. It is rotatably inserted in the lens frame. A sliding shaft is fixed to the optical pickup main body side, and the servo control for tracking is performed by angularly displacing the lens frame around the sliding shaft. Also,
A focus coil is provided on the outer periphery of the lens frame, and it works with a focus magnet mounted on a pair of yokes formed on the optical pickup body side to slide the objective lens in the axial direction for focus adjustment. In addition, the outer circumference of the lens frame is wound so as to be orthogonal to the focus coil.
A pair of tracking coils is provided, which works with a pair of tracking magnets mounted on a pair of yokes formed on the optical pickup body side to rotate the objective lens about a sliding axis by a predetermined angle to adjust the tracking of the objective lens. Is supposed to do.

【0004】一方、ワイヤ支持型の対物レンズ支持装置
は、図8及び図9に示すように、対物レンズ10がレン
ズ枠200に取付けられ、レンズ枠200には駆動コイ
ル300が装着されている。ワイヤホルダ400から上
下2対(計4本)のワイヤ状弾性部材Wが平行状態で延
設され、レンズ枠200側の取付部200aに固定され
ている。これにより、レンズ枠200はワイヤ状弾性部
材Wによりワイヤホルダ400に片持ち状態で支持され
る。ワイヤ支持型の対物レンズ支持装置のより詳細な構
成について説明すると、図9に示すように、対物レンズ
10を保持するレンズ枠200は、例えばフォーカスコ
イル300aとトラッキングコイル300bを巻いたボ
ビン状とされている。
On the other hand, in the wire supporting type objective lens supporting device, as shown in FIGS. 8 and 9, the objective lens 10 is attached to the lens frame 200, and the driving coil 300 is attached to the lens frame 200. Two pairs of upper and lower (four in total) wire-shaped elastic members W are extended in parallel from the wire holder 400 and fixed to the mounting portion 200a on the lens frame 200 side. As a result, the lens frame 200 is supported by the wire holder 400 by the wire elastic member W in a cantilevered state. A more detailed structure of the wire supporting type objective lens supporting device will be described. As shown in FIG. 9, the lens frame 200 holding the objective lens 10 is, for example, a bobbin shape in which a focus coil 300a and a tracking coil 300b are wound. ing.

【0005】ワイヤホルダ400は光ピックアップ本体
500と一体に設けられ、上下2対(計4本)のワイヤ
状弾性部材Wが平行状態で延設されてレンズ枠200側
の取付部200aに固定される。そして、光ピックアッ
プ本体500側に形成される1対のヨーク600および
700に装着される磁石M3と作用して対物レンズ10
を垂直方向に移動させてフォーカス調整を行う。この際
に、各ワイヤ状弾性部材Wは垂直方向の駆動力に応じて
レンズ枠200を追従移動させるように垂直方向にそれ
ぞれ変形する。また、トラッキングコイル300bと磁
石M3が作用して対物レンズ10を水平方向に移動させ
てトラッキング調整を行うようになっている。この際
に、各ワイヤ状弾性部材Wは水平方向の駆動力(駆動
力)に応じてレンズ枠200を追従移動させるように水
平方向にそれぞれ変形する。なお、ワイヤ支持型の対物
レンズ支持装置においては、各ワイヤ状弾性部材Wは、
フォーカスコイル300aおよびトラッキングコイル3
00bに給電する役割を兼ねている。
The wire holder 400 is provided integrally with the optical pickup body 500, and two pairs of upper and lower (four in total) wire-shaped elastic members W are extended in parallel and fixed to the mounting portion 200a on the lens frame 200 side. . Then, it acts on the magnet M3 mounted on the pair of yokes 600 and 700 formed on the optical pickup body 500 side, and the objective lens 10
Move the in the vertical direction to adjust the focus. At this time, each wire-shaped elastic member W is deformed in the vertical direction so as to move the lens frame 200 in accordance with the driving force in the vertical direction. In addition, the tracking coil 300b and the magnet M3 act to move the objective lens 10 in the horizontal direction to perform tracking adjustment. At this time, each wire-shaped elastic member W is deformed in the horizontal direction so as to move the lens frame 200 in accordance with the horizontal driving force (driving force). In the wire supporting type objective lens supporting device, each wire-shaped elastic member W is
Focus coil 300a and tracking coil 3
It also serves to supply power to 00b.

【0006】[0006]

【発明が解決しようとする課題】ところが、軸摺動型の
対物レンズ支持装置は、摺動軸とレンズ枠との間で、摺
動時および回転時に摩擦抵抗を生じるためフォーカス速
度が比較的遅く、トラッキングの追従性も劣るという難
点があった。特に昨今は、CDドライブ装置やDVDド
ライブ装置等の読込速度や書込速度の向上に伴い、CD
ディスクやDVDディスク等の回転速度も高速化する傾
向にある。そのため、その回転速度の高速化に伴って光
ピックアップにもフォーカス速度やトラッキングの高速
な追従性が要求されるが、上記軸摺動型の対物レンズ支
持装置ではその高速化の要求に十分に応えることができ
ないという問題があった。また、軸摺動型では、摩擦抵
抗を少なくするために摺動軸とレンズ枠の軸受孔のクリ
アランスを大きくすると、対物レンズの光軸に傾きを生
じ易くなり、フォーカシングやトラッキングの精度が低
下するという問題を生じる。
However, the objective lens support device of the shaft sliding type has a relatively low focus speed because frictional resistance is generated between the sliding shaft and the lens frame during sliding and rotation. However, there is a drawback that tracking performance is poor. In particular, recently, with the improvement of reading speed and writing speed of CD drive devices and DVD drive devices, CD
The rotation speed of disks and DVD disks also tends to increase. Therefore, as the rotation speed increases, the optical pickup is also required to have high tracking speed for tracking the focus speed and tracking, but the above-mentioned shaft sliding type objective lens supporting device sufficiently meets the request for high speed. There was a problem that I could not. Further, in the shaft sliding type, if the clearance between the sliding shaft and the bearing hole of the lens frame is increased in order to reduce the frictional resistance, the optical axis of the objective lens is likely to be tilted and the accuracy of focusing and tracking deteriorates. Causes the problem.

【0007】一方のワイヤ支持型の対物レンズ支持装置
は、フォーカス速度やトラッキングの高速追従性に優れ
る反面、変位に対しての自由度が大きいため、特に、対
物レンズ支持装置自体の移動による慣性力を受けやす
く、トラッキングに影響を与えるローリング(回転)や
ピッチング(振動)などを含む多方向の変位が生じやす
く、外乱や振動に対して弱いという難点がある。
On the other hand, the wire-supported objective lens support device is excellent in focus speed and tracking at high speed, but has a large degree of freedom in displacement. Therefore, the inertial force due to the movement of the objective lens support device itself is particularly large. However, it is susceptible to disturbances and vibrations because it is susceptible to multi-directional displacements such as rolling (pitching) and pitching (vibration) that affect tracking.

【0008】この発明は、上記問題点を解決すべく案出
されたものであり、装置自体の移動による慣性力を受け
にくく、トラッキングの高速追従性に優れると共に、ロ
ーリングやピッチングなどの変位を生じ難い対物レンズ
支持装置を提供することを目的としている。
The present invention has been devised in order to solve the above-mentioned problems. It is difficult to receive an inertial force due to the movement of the device itself, is excellent in high-speed tracking of tracking, and causes displacement such as rolling or pitching. An object is to provide a difficult objective lens supporting device.

【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、本発明は、ディスク型媒体上を移動することで、前
記ディスク型媒体に同心円若しくはスパイラル上に多数
形成されたトラックへの光ビームスポットの焦点合わせ
および位置合わせを行うための光ピックアップの対物レ
ンズ支持装置において、前記ディスク型媒体に光ビーム
を照射する対物レンズ(21)が取付けられ、回転する
ことで前記対物レンズの光軸を光軸方向に垂直なトラッ
ク方向に変位させるレンズ枠(2)と、前記レンズ枠に
設けられ、該レンズ枠を回転させる駆動力を受ける手段
(例えば、トラッキングコイルC2)と、前記レンズ枠
に設けられる前記駆動力を受ける手段に対して駆動力を
発生させる手段(例えば駆動用磁石35)が設けられる
光ピックアップ本体の支持基体(3)と、前記支持基体
から延設され、先端部が前記レンズ枠に設けられたワイ
ヤ固定部材(25,26)に前記レンズ枠の回転中心
(R)より前記対物レンズ側の位置で固定されて、該レ
ンズ枠を片持ち状態で揺動可能に支持する左右1対また
は上下2対のワイヤ状弾性部材(W1a,W1b,W1
c,W1d)とを備え、前記左右1対または上下2対の
ワイヤ状弾性部材のうち左右のワイヤ状弾性部材(例え
ばW1a,W1b)どうしは、非平行で且つ前記対物レ
ンズ中心及び回動中心を通る垂直な平面に対して対称と
なるように、互いの先端部に向かって漸次接近し、これ
ら左右のワイヤ状弾性部材の延長線上の交点(K)が、
前記対物レンズの中心(S)と前記レンズ枠の回転中心
との間に位置するように配置されたものとした。
In order to achieve the above object, the present invention is to move a disk-shaped medium so that a light beam to a plurality of tracks formed concentrically or spirally on the disk-shaped medium. In an objective lens supporting device of an optical pickup for focusing and aligning a spot, an objective lens (21) for irradiating a light beam to the disk type medium is attached, and the optical axis of the objective lens is rotated by rotating the objective lens. A lens frame (2) that is displaced in the track direction perpendicular to the optical axis direction, a means (for example, a tracking coil C2) that is provided in the lens frame and receives a driving force that rotates the lens frame, and the lens frame. Optical pickup book provided with means (for example, driving magnet 35) for generating driving force with respect to the means for receiving the driving force Of the support base (3) and a wire fixing member (25, 26) extending from the support base and having a tip portion provided on the lens frame, on the objective lens side from the rotation center (R) of the lens frame. One pair of right and left or two pairs of upper and lower wire-shaped elastic members (W1a, W1b, W1) which are fixed in position and swingably support the lens frame in a cantilever state.
c, W1d), the left and right wire-shaped elastic members (for example, W1a, W1b) of the pair of left and right wire-shaped elastic members (for example, W1a, W1b) are non-parallel, and the objective lens center and the rotation center So as to be symmetric with respect to a vertical plane passing through, gradually approaching each other toward their tips, and the intersection point (K) on the extension line of these left and right wire-like elastic members is
It was arranged so as to be located between the center (S) of the objective lens and the center of rotation of the lens frame.

【0010】これにより、トラッキングの高速追従性が
確保されつつ、従来の上下2対のワイヤ状弾性部材を平
行状態で延設した構成に比して光ピックアップの移動に
よる慣性力を受けにくくローリングやピッチングなどの
トラッキングに悪影響を及ぼす変位を生じ難くすること
ができる。詳細には、対物レンズ支持装置自体の移動後
でもその慣性力によるレンズ枠自体のトラック方向の変
位は極めて小さく慣性力補正などが必要なく、従来の上
下2対のワイヤ状弾性部材を平行状態で延設した構成に
比してトラッキングの追従性を向上させることができ
る。
As a result, while ensuring high-speed tracking of tracking, compared to the conventional structure in which two pairs of upper and lower wire-shaped elastic members are extended in parallel, it is less susceptible to inertial force due to movement of the optical pickup, and rolling or It is possible to make it difficult to cause a displacement that adversely affects tracking such as pitching. More specifically, the displacement of the lens frame itself in the track direction due to its inertial force is extremely small even after the movement of the objective lens supporting device itself, and the inertial force correction is not required. Tracking followability can be improved as compared with the extended structure.

【0011】また、前記左右のワイヤ状弾性部材の延長
線上の交点が、前記対物レンズの中心と前記レンズ枠の
回動中心との間の中点となるように、前記左右のワイヤ
状弾性部材が前記ワイヤ固定部材を介して前記レンズ枠
に固定するとよい。これにより上述した構成のものより
さらにトラッキングの追従性を向上させることができ
る。さらに、上記発明において、前記レンズ枠を、前記
支持基体から延出された上下2対のワイヤ状弾性部材に
より揺動可能に支持されるように構成し、前記ワイヤ状
弾性部材を、レンズ枠の高さ方向に対しては上下で互い
に平行に、且つ横方向に対しては非平行で平面視ハ字状
となるように配置してもよい。この場合、前記レンズ枠
の上下面にワイヤ固定部材を夫々設けられ、これらワイ
ヤ固定部材に先端部を固定する。これら上下面のワイヤ
固定部材は、それぞれ前記上面及び下面から離間する方
向に突出し、前記ワイヤ状弾性部材の先端が挿入される
挿入孔を備える突出部と、前記突出部に隣接して設けら
れ該突出部の挿入孔に先端が挿入されたワイヤ状弾性部
材の先端部分が半田付けにより固着される固着部とを備
え、前記固着部は、ワイヤ状弾性部材の先端部分を前記
レンズ枠の上方、下方または側方のうちいずれか一方か
ら半田付けにより固着可能な位置に配置されている構成
とする。これにより、前記ワイヤ状弾性部材をワイヤ固
定部材に固定する作業を、前記レンズ枠の上方、下方ま
たは側方のうちいずれか一方からの半付けにより容易に
行うことができる。
Further, the left and right wire-like elastic members are arranged so that an intersection on the extension lines of the left and right wire-like elastic members is a midpoint between the center of the objective lens and the rotation center of the lens frame. May be fixed to the lens frame via the wire fixing member. As a result, it is possible to further improve the tracking capability of the tracking as compared with the configuration described above. Further, in the above invention, the lens frame is configured to be swingably supported by two pairs of upper and lower wire-shaped elastic members extending from the support base, and the wire-shaped elastic member is provided in the lens frame. They may be arranged vertically in parallel with each other in the height direction and non-parallel in the lateral direction so as to have a V-shape in plan view. In this case, wire fixing members are provided on the upper and lower surfaces of the lens frame, and the tip portions are fixed to these wire fixing members. The wire fixing members on the upper and lower surfaces are provided adjacent to the projecting portion, each projecting in a direction separating from the upper surface and the lower surface, the projecting portion having an insertion hole into which the tip of the wire-like elastic member is inserted, A wire-shaped elastic member whose tip is inserted into the insertion hole of the protrusion; and a fixing portion fixed by soldering, wherein the fixing portion has a tip portion of the wire-shaped elastic member above the lens frame, It is arranged such that it can be fixed by soldering from either the lower side or the side. Accordingly, the work of fixing the wire-like elastic member to the wire fixing member can be easily performed by half-fitting the lens frame from above, below, or laterally.

【0012】さらに、前記固着部は、前記左右のワイヤ
状弾性部材の先端が挿入される挿入孔の間で、且つ前記
左右のワイヤ状弾性部材の先端部に隣接して配置された
構成としてもよい。これより、左右のワイヤ状弾性部材
の先端部を側方から前記固着部に半田付けすることがで
き、前記ワイヤ状弾性部材をレンズ枠に容易に固定する
ことができる。また、前記固着部は、前記左右のワイヤ
状弾性部材の先端が挿入される挿入孔と前記ワイヤ固定
部材が取り付けられた上面及び下面のそれぞれとの間に
配置されるとともに、前記左右のワイヤ状弾性部材の先
端部に隣接して配置されている構成としても良い。これ
より、左右のワイヤ状弾性部材の先端部を上方及び側方
から前記固着部に半田付けすることができ、前記ワイヤ
状弾性部材をレンズ枠に容易に固定することができる。
Further, the fixing portion may be arranged between the insertion holes into which the tips of the left and right wire-like elastic members are inserted and adjacent to the tip portions of the left and right wire-like elastic members. Good. As a result, the tip ends of the left and right wire-shaped elastic members can be soldered from the side to the fixing portion, and the wire-shaped elastic members can be easily fixed to the lens frame. The fixed portion is disposed between the insertion hole into which the tip of the left and right wire-shaped elastic members is inserted and each of the upper surface and the lower surface to which the wire fixing member is attached, and The elastic member may be arranged adjacent to the tip of the elastic member. As a result, the tip ends of the left and right wire-shaped elastic members can be soldered to the fixing portion from above and laterally, and the wire-shaped elastic members can be easily fixed to the lens frame.

【0013】[0013]

【発明の実施の形態】以下、本発明の好適な実施形態を
図面に基づいて説明する。本実施の形態の対物レンズ支
持装置は、同心円若しくはスパイラル上に多数形成され
たトラックへの光ビームスポットの焦点合わせおよび位
置合わせを行うための光ピックアップの一部を成すもの
である。図1に示すように、対物レンズ支持装置1は、
対物レンズ21および対物レンズ21焦点合わせ、位置
合わせを行うための駆動力を受ける手段としての3種類
のコイル(C1、C2、C3)を備えたレンズ枠2と、
前記駆動力を発生させる手段としての磁気回路を備えた
支持基体3と、この支持基体3から延設され、先端部が
ワイヤ固定部材25,26を介してレンズ枠2に固定さ
れることで、レンズ枠2を片持ち状態で揺動可能に支持
する4本のワイヤ状弾性部材W1a〜W1dと、これら
を上方から覆うカバー部4等とを備える。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. The objective lens supporting device of the present embodiment forms a part of an optical pickup for focusing and positioning a light beam spot on a number of tracks formed concentrically or spirally. As shown in FIG. 1, the objective lens supporting device 1 is
A lens frame 2 provided with an objective lens 21 and three types of coils (C1, C2, C3) as means for receiving a driving force for focusing and aligning the objective lens 21;
By supporting base 3 provided with a magnetic circuit as a means for generating the driving force, and extending from this support base 3, and the tip end being fixed to lens frame 2 via wire fixing members 25 and 26, It is provided with four wire-shaped elastic members W1a to W1d that swingably support the lens frame 2 in a cantilever state, a cover portion 4 that covers these from above, and the like.

【0014】前記支持基体3は、前記磁気回路を構成す
る基体部3aと、先端部がレンズ枠2にワイヤ固定部材
25を介してレンズ枠2に固定されたワイヤ状弾性部材
W1a〜W1dの基端部が固定される支持部3b等とを
有する。基体部3aは、板金もしくはロストワックス成
形による鉄材をベースにしたもので構成され、底面は、
光ディスクのトラックが形成された情報記録面とほぼ平
行に配置される。この基体部3aの底面部には挿入部3
2を介して、磁気回路を構成する磁石用ヨーク31が挿
入され、ビス33によって固定されている。また、前記
底面部には、所定間隔をあけて揺動自在なレンズ枠2を
挟んで対峙するように側壁部34が立設され、側壁部3
4には、それぞれ一対の駆動用磁石(マグネット)35
がレンズ枠2の3種類のコイルC1,C2,C3を挟む
ように固定されている。上記基体部3a、磁石用ヨーク
31及び一対の駆動用磁石35等により磁気回路は構成
されている。
The support base 3 is a base of a base portion 3a constituting the magnetic circuit, and wire-like elastic members W1a to W1d whose distal end is fixed to the lens frame 2 via a wire fixing member 25. It has the support part 3b etc. to which an edge part is fixed. The base portion 3a is composed of a sheet metal or an iron material formed by lost wax molding as a base, and the bottom surface is
The optical disk is arranged substantially parallel to the information recording surface on which the tracks are formed. The insertion portion 3 is provided on the bottom surface of the base portion 3a.
A magnet yoke 31 forming a magnetic circuit is inserted through the connector 2 and is fixed by screws 33. A side wall portion 34 is erected on the bottom surface portion so as to face each other with the swingable lens frame 2 interposed therebetween at a predetermined interval.
4 includes a pair of driving magnets (magnets) 35, respectively.
Are fixed so as to sandwich the three types of coils C1, C2, C3 of the lens frame 2. A magnetic circuit is configured by the base portion 3a, the magnet yoke 31, the pair of driving magnets 35, and the like.

【0015】支持部3bは、基体部3aの一端部側から
上方に凹状に突出して設けられた壁部36に内嵌され、
これにより、レンズ枠2はワイヤ状弾性部材W1a〜W
1dを介して支持基体3の基体部3aの中央部上方で上
下左右に揺動可能に支持された状態となる。詳細には支
持部3bでは、両側部に形成された溝にワイヤ状弾性部
材の基端部を内嵌させた状態でゲルが充填され、支持部
3bの背部に設けられた背板部の孔部にワイヤ状弾性部
材の基端を挿通し半田により固定している。ゲルは制振
部材としての機能を有する。なお、支持部3bの後端側
にはワイヤ状弾性部材W1に電源線等を接続するフレキ
シブル基板が設けられる。
The support portion 3b is fitted into a wall portion 36 provided so as to project upward in a concave shape from one end side of the base portion 3a,
As a result, the lens frame 2 has the wire-shaped elastic members W1a to W1.
It is in a state of being swingably supported vertically and horizontally above the central portion of the base portion 3a of the support base 3 via 1d. Specifically, in the support portion 3b, the gel is filled with the base end portions of the wire-shaped elastic members fitted in the grooves formed on both sides, and the holes of the back plate portion provided on the back portion of the support portion 3b are provided. The base end of the wire-shaped elastic member is inserted into the portion and fixed by soldering. The gel has a function as a vibration damping member. A flexible substrate for connecting a power line or the like to the wire-shaped elastic member W1 is provided on the rear end side of the support portion 3b.

【0016】レンズ枠2は、上面に取り付けられたワイ
ヤ固定部材25を介してワイヤ状弾性部材W1a,W1
bの先端部が固定されたレンズ枠本体22と、対物レン
ズ21が嵌め込まれたレンズホルダ24と、レンズ枠本
体22の下部に一体的に形成されてコイルC1、C2、
C3が取り付けられるとともに下面に取り付けられたワ
イヤ固定部材26を介してワイヤ状弾性部材W1c,W
1dの先端部が固定されたコイル取付部23等とを備え
る。
The lens frame 2 has wire-like elastic members W1a and W1 via a wire fixing member 25 attached to the upper surface.
The lens frame main body 22 to which the front end of b is fixed, the lens holder 24 into which the objective lens 21 is fitted, and the coils C1 and C2 integrally formed on the lower portion of the lens frame main body 22.
The wire-shaped elastic members W1c, W are attached via the wire fixing member 26 to which C3 is attached and which is attached to the lower surface.
The coil mounting portion 23 and the like having a fixed tip portion of 1d.

【0017】前記レンズホルダ24は、図1、図2及び
図3に示すように前記対物レンズ21が嵌め込まれた筒
状部24aを有し、支持基体3から延設されたワイヤ状
弾性部材W1a,W1bの延在方向にレンズ枠本体22
に一体に形成されている。
The lens holder 24 has a cylindrical portion 24a in which the objective lens 21 is fitted as shown in FIGS. 1, 2 and 3, and a wire-shaped elastic member W1a extending from the support base 3. , W1b extending in the lens frame body 22
Is formed integrally with.

【0018】コイル取付部23には3種類のコイルつま
り、レンズ枠2とともに対物レンズ21を光ビームの光
軸方向に移動させるためのフォーカスコイルC1、レン
ズ枠2とともに対物レンズ21を光ビームの光軸と垂直
方向に変位させるためのトラッキングコイルC2、レン
ズ枠2とともに対物レンズ21を傾斜させることで光軸
を傾斜させるためのチルトコイルC3等が取り付けられ
ている。
The coil mounting portion 23 has three types of coils, that is, a focus coil C1 for moving the objective lens 21 together with the lens frame 2 in the optical axis direction of the light beam, and the objective lens 21 together with the lens frame 2 with the light beam of the light beam. A tracking coil C2 for displacing in the direction perpendicular to the axis, a tilt coil C3 for tilting the optical axis by tilting the objective lens 21 together with the lens frame 2 and the like are attached.

【0019】フォーカスコイルC1は、略矩形状に巻回
された角形コイルから成るもので、前記コイル取付部2
3に下方から内嵌するようにして取り付けられている。
フォーカスコイルC1は前記磁気回路の駆動用磁石3
5,35間に配置され、通電されることで磁気回路によ
る磁束の作用を受け、フレミングの左手の法則により、
光ビームスポットの焦点を合わせるために光ビームの光
軸方向にレンズ枠2と該レンズ枠2に一体的に設けられ
た対物レンズ21とを移動させる。
The focus coil C1 is composed of a rectangular coil wound in a substantially rectangular shape, and has the coil mounting portion 2
3 is attached so as to be internally fitted from below.
The focus coil C1 is a magnet 3 for driving the magnetic circuit.
It is placed between 5 and 35, and when it is energized, it is affected by the magnetic flux from the magnetic circuit, and according to Fleming's left-hand rule,
In order to focus the light beam spot, the lens frame 2 and the objective lens 21 provided integrally with the lens frame 2 are moved in the optical axis direction of the light beam.

【0020】トラッキングコイルC2は、フォーカスコ
イルC1の巻回方向と直交する方向に巻回された一対の
角形コイルであり、フォーカスコイルC1を挟むととも
に、それぞれ駆動用磁石35に対向し、平面視して固定
部材25部分を中心に対角する位置となるようにコイル
取付部23に固定されている。そして、これらトラッキ
ングコイルC2のそれぞれの端部は、トラッキングコイ
ルC2が取り付けられた側面と隣り合う側面から突出し
た状態となっている。
The tracking coil C2 is a pair of rectangular coils wound in a direction orthogonal to the winding direction of the focus coil C1. The tracking coil C2 sandwiches the focus coil C1 and faces the driving magnets 35, respectively, and is seen in a plan view. And is fixed to the coil attachment portion 23 so as to be diagonally positioned with the fixing member 25 portion as the center. Each end of these tracking coils C2 is in a state of protruding from the side surface adjacent to the side surface to which the tracking coil C2 is attached.

【0021】これにより、トラッキングコイルC2は、
通電されて前記磁気回路の磁束の作用を受けることによ
ってフレミングの左手の法則により、レンズ枠本体22
に駆動力を与え、レンズ枠本体22は回転中心部を中心
に略水平方向に揺動し、該レンズ枠本体22と一体に形
成されたレンズホルダ24を介して対物レンズ21を、
トラッキング方向、つまり、光ビームの光軸に対して垂
直な方向に変位させることができる。よって、光ディス
クに記載された情報を読み取る際に、光ビームスポット
のトラック方向の位置を正確に決定することができる。
なお、トラッキングコイルC2は、駆動用磁石35間
で、且つフォーカスコイルC1を挟んだ状態で一対設け
られているので、レンズ枠2が回転中心(図5の符号
R)を中心に水平方向に回転する際に、バランスよく水
平方向に回転できるものとなっている。このように対物
レンズ支持装置においてはフォーカス方向は並進、トラ
ッキング方向は回転によって制御され、トラッキング方
向の一次共振周波数を高く設定可能となっている。な
お、フォーカスに対して√3倍の一次共振周波数として
いる。
As a result, the tracking coil C2 is
By being energized and receiving the action of the magnetic flux of the magnetic circuit, the lens frame main body 22
To drive the objective lens 21 through a lens holder 24 formed integrally with the lens frame main body 22.
It can be displaced in the tracking direction, that is, in the direction perpendicular to the optical axis of the light beam. Therefore, when reading the information written on the optical disc, the position of the light beam spot in the track direction can be accurately determined.
Since a pair of tracking coils C2 are provided between the drive magnets 35 and sandwiching the focus coil C1, the lens frame 2 rotates horizontally about the rotation center (reference numeral R in FIG. 5). When doing so, it can rotate in a horizontal direction with good balance. As described above, in the objective lens support device, the focus direction is controlled by translation and the tracking direction is controlled by rotation, and the primary resonance frequency in the tracking direction can be set high. The primary resonance frequency is √3 times the focus.

【0022】チルトコイルC3は、扁平角形状に巻回さ
れた一対のコイルから成り、フォーカスコイルC1およ
びトラッキングコイルC2を挟んで、且つ、駆動用磁石
35間でこれら駆動用磁石35に対向するコイル取付部
23の側面部に固定されている。詳細には、トラッキン
グコイルC2の外面側で、レンズ枠2のコイル取付部2
3の下方に突出した状態で銅線の巻回方向がフォーカス
コイルC1の巻回方向と直交するように取り付けられて
いる。このチルトコイルC3は、対物レンズ21を介し
て光ビームを照射することで光ディスクのトラックに情
報を記憶させたり、トラックから情報を読みとったりす
る際に、光ディスクを回転させるスピンドルモータ等の
回転手段の軸振れや光ディスク単体の反りによって生じ
る光ディスクの傾きに追従させて、対物レンズ21の光
軸を傾斜させ、光ビームを光ディスクの読み取り面に対
して垂直に入射させる駆動力を受けるものである。
The tilt coil C3 is composed of a pair of coils wound in a flat rectangular shape. The tilt coil C3 sandwiches the focus coil C1 and the tracking coil C2 and faces the drive magnets 35 between the drive magnets 35. It is fixed to the side surface of the mounting portion 23. Specifically, the coil attachment portion 2 of the lens frame 2 is provided on the outer surface side of the tracking coil C2.
3 is attached so that the winding direction of the copper wire is orthogonal to the winding direction of the focus coil C1 while protruding downward. The tilt coil C3 serves as a rotation unit such as a spindle motor that rotates the optical disk when the information is stored in the track of the optical disk or is read from the track by irradiating the optical beam through the objective lens 21. The optical axis of the objective lens 21 is tilted so as to follow the tilt of the optical disk caused by the axial runout or the warp of the optical disk itself, and a driving force for making the light beam enter perpendicularly to the reading surface of the optical disk is received.

【0023】前記上下2対のワイヤ状弾性部材W1a〜
W1dは、それぞれ、例えば、ベリリウム・銅合金から
成るもので、その直径が約0.1mmのワイヤで構成さ
れ、レンズ枠の高さ方向に対しては上下で互いに平行
に、且つ横方向に対しては非平行で且つ前記対物レンズ
21中心及び回転中心を通る垂直な平面に対して対称と
なるように、互いの先端部に向かって漸次接近するよう
に配置されている。
Two pairs of upper and lower wire-shaped elastic members W1a
Each W1d is made of, for example, beryllium-copper alloy, and is composed of a wire having a diameter of about 0.1 mm. The W1d is vertically parallel to the height direction of the lens frame, and laterally. Are non-parallel and symmetrical with respect to a vertical plane that passes through the center of the objective lens 21 and the center of rotation, and are arranged so as to gradually approach each other toward their tips.

【0024】詳細には、それぞれ左右のワイヤ状弾性部
材どうし、ここでは上側左右のワイヤ状弾性部材W1
a,w1bどうしと、下側の左右のワイヤ状弾性部材W
1c,W1dどうしが、それぞれ互いに先端側に向かっ
て、水平状態で収斂するようにレンズ枠2の上下面のワ
イヤ固定部材25,26に半田付けされている。つま
り、左右に並んで水平状態に取り付けられるワイヤ状弾
性部材W1aとW1b、W1cとW1dは、それぞれの
先端部がワイヤ固定部材25,26に固定されること
で、平面視においてハ字状に配置された状態となってい
る。このように前記基体部3aに固定された支持部3b
に取り付けられたワイヤ状弾性部材Wを介してレンズ枠
2は前記支持基体3に、片持ち状態で、上下左右に揺動
可能に支持されたものとなっている。
More specifically, the left and right wire-like elastic members, here, the upper left and right wire-like elastic members W1, respectively.
a, w1b and the lower left and right wire-shaped elastic members W
1c and W1d are soldered to the wire fixing members 25 and 26 on the upper and lower surfaces of the lens frame 2 so as to converge in a horizontal state toward the front end side of each other. That is, the wire-shaped elastic members W1a and W1b, and W1c and W1d that are horizontally mounted side by side are arranged in a V shape in a plan view by fixing the respective tip portions to the wire fixing members 25 and 26. It is in the state of being The support portion 3b fixed to the base portion 3a in this way
The lens frame 2 is supported by the support base 3 in a cantilever state so as to be swingable vertically and horizontally via a wire-like elastic member W attached to.

【0025】また、この上下2対のワイヤ状弾性部材W
は、レンズ枠2を支持するだけではなく、レンズ枠2取
り付けられた各種コイルC1、C2、C3に電力を供給
する給電線の役割も担っている。
Further, the upper and lower pairs of wire-like elastic members W
Not only supports the lens frame 2, but also plays a role of a power supply line that supplies electric power to the various coils C1, C2, and C3 attached to the lens frame 2.

【0026】ワイヤ固定部材25は、図2、図4及び図
5に示すように、レンズ枠本体22の平面視略中心部分
の上面に取り付けられ、上面から離間する方向、つまり
上方に突出し、ワイヤ状弾性部材W1a,W1bの先端
が挿入される挿入孔251a,251aを備える突条部
(突出部)251と、突条部251に隣接し、挿入孔2
51a,251aに先端が挿入されたワイヤ状弾性部材
W1a,W1bの先端部分がそれぞれ半田付けにより固
着された固着板部(固着部)252とを備える。
As shown in FIGS. 2, 4 and 5, the wire fixing member 25 is attached to the upper surface of the central portion of the lens frame main body 22 in plan view and protrudes in a direction away from the upper surface, that is, upward. Ridges (projections) 251 having insertion holes 251a, 251a into which the tips of the elastic members W1a, W1b are inserted, and the insertion holes 2 adjacent to the projections 251.
The wire-shaped elastic members W1a and W1b, the tip ends of which are inserted into 51a and 251a, respectively, are provided with a fixing plate portion (fixing portion) 252 that is fixed by soldering.

【0027】固着板部252の上面(表面)には、図5
に示すように、先端に向かって漸次接近するワイヤ状弾
性部材W1a,W1bの先端部が嵌め込まれる溝部25
2a,252aが形成されている。これら溝部252
a,252aは、対物レンズ21側に向かって収斂する
ように平面視ハ字状に形成されている。
On the upper surface (front surface) of the fixing plate portion 252, as shown in FIG.
As shown in FIG. 5, the groove portion 25 into which the tip portions of the wire-like elastic members W1a and W1b that gradually approach toward the tip ends are fitted.
2a and 252a are formed. These grooves 252
The a and 252a are formed in a C-shape in a plan view so as to converge toward the objective lens 21 side.

【0028】ワイヤ状弾性部材W1a,W1bの先端を
挿入孔251a,251aに挿入する際に、ワイヤ状弾
性部材W1a,W1bの先端を溝部252a,252a
内に挿通させていくことで、先端を挿入孔251a,2
51aにガイドし、該挿入孔251a,251aに先端
を容易に挿入させることができる。固着板部252に
は、先端が挿入孔251a,251aのそれぞれに挿入
された状態のワイヤ状弾性部材W1a,W1bの先端部
が上方からの半田付け(図4参照)により固定されてい
る。
When inserting the tips of the wire-like elastic members W1a and W1b into the insertion holes 251a and 251a, the tips of the wire-like elastic members W1a and W1b are inserted into the groove portions 252a and 252a.
By inserting the tip into the insertion holes 251 a, 2
The tip can be easily inserted into the insertion holes 251a, 251a by being guided by 51a. To the fixing plate portion 252, the tip ends of the wire-shaped elastic members W1a and W1b with the tips inserted into the insertion holes 251a and 251a are fixed by soldering from above (see FIG. 4).

【0029】ワイヤ固定部材26は、ワイヤ固定部材2
5と同様に形成され、同様に取り付けられる、つまり、
図3に示すように、コイル取付部23の下面に、且つワ
イヤ固定部材25の鉛直下方に取り付けられ、下面から
離間する方向、つまり下方に突出し、ワイヤ状弾性部材
W1c,W1dの先端が挿入される挿入孔261a,2
61aを備える突条部(突出部)261と、突条部26
1に隣接し、挿入孔261a,261aに先端が挿入さ
れたワイヤ状弾性部材W1c,W1dの先端部分がそれ
ぞれ半田付けにより固着された固着板部(固着部)26
2とを備える。
The wire fixing member 26 is the wire fixing member 2
5, formed and attached in the same way, that is,
As shown in FIG. 3, the wire-shaped elastic members W1c and W1d are attached to the lower surface of the coil attachment portion 23 and vertically below the wire fixing member 25, projecting in a direction away from the lower surface, that is, downward. Insertion holes 261a, 2
A ridge portion (projection portion) 261 including 61a, and a ridge portion 26.
1. Adhesion plate portion (adhesion portion) 26 adjacent to No. 1 and to which the tip end portions of the wire-like elastic members W1c and W1d whose tip ends are inserted into the insertion holes 261a and 261a are attached by soldering, respectively.
2 and.

【0030】固着板部262の下面(表面)には、上述
したワイヤ固定部材25の固着板部252と同様に、図
3に示すように、先端に向かって漸次接近するワイヤ状
弾性部材W1c,W1dの先端部が嵌め込まれる溝部2
62a,262aが形成されている。そして、これら溝
部262a,262aは、ワイヤ状弾性部材W1a,W
1bの先端を挿入孔261a,261aに挿入する際
に、ワイヤ状弾性部材W1a,W1bの先端を溝部26
2a,262a内に挿通させていくことで、先端を挿入
孔261a,261aにガイドし、該挿入孔261a,
261aに先端を容易に挿入させることができる。
As shown in FIG. 3, the lower surface (front surface) of the fixing plate portion 262, like the fixing plate portion 252 of the wire fixing member 25, has wire-like elastic members W1c, which gradually approach toward the tip. Groove 2 into which the tip of W1d is fitted
62a and 262a are formed. And these groove parts 262a and 262a are wire-shaped elastic members W1a and W.
1b is inserted into the insertion holes 261a, 261a, the tip ends of the wire-shaped elastic members W1a, W1b are inserted into the groove portion 26.
2a, 262a, the tip is guided to the insertion holes 261a, 261a by inserting the insertion holes 261a, 262a.
The tip can be easily inserted into 261a.

【0031】固着板部262には、固着板部252と同
様に、先端が挿入孔261a,261aのそれぞれに挿
入された状態のワイヤ状弾性部材W1c,W1dの先端
部が下方からの半田付けにより固定されている。なお、
上下のワイヤ固定部材25.26の両側部分には、レン
ズ枠本体22及びコイル取付部23とを貫通する挿通孔
22aが形成され、この挿通孔22aには、磁石用ヨー
ク31が挿通される。
Like the fixing plate portion 252, the fixing plate portion 262 is soldered from below to the tip portions of the wire-like elastic members W1c and W1d with the tips inserted into the insertion holes 261a and 261a, respectively. It is fixed. In addition,
Insertion holes 22a are formed in both sides of the upper and lower wire fixing members 25.26 so as to penetrate the lens frame body 22 and the coil attachment portion 23, and the magnet yoke 31 is inserted into the insertion holes 22a.

【0032】このように固着板部252(262)は、
それぞれ左右のワイヤ状弾性部材W1aとW1b(W1
cとW1d)の先端が挿入される挿入孔251a(26
1a)とワイヤ固定部材25,26が取り付けられた上
面及び下面のそれぞれとの間に配置されるとともに、左
右のワイヤ状弾性部材W1aとW1b(W1cとW1
d)の先端部に隣接して配置された構成となっているの
で、左右のワイヤ状弾性部材W1aとW1b(W1cと
W1d)の先端部を上方及び側方から固着板部252,
262に半田付けすることができ、ワイヤ状弾性部材W
1aとW1b(W1cとW1d)をレンズ枠2に容易に
固定することができる。
Thus, the fixing plate portion 252 (262) is
The left and right wire-shaped elastic members W1a and W1b (W1
c and W1d) the insertion holes 251a (26
1a) and each of the upper and lower surfaces to which the wire fixing members 25 and 26 are attached, and the left and right wire-shaped elastic members W1a and W1b (W1c and W1).
Since it is arranged so as to be adjacent to the tip portion of d), the tip portions of the left and right wire-shaped elastic members W1a and W1b (W1c and W1d) are fixed to the fixing plate portion 252 from above and sideways.
262 can be soldered to the wire-like elastic member W
1a and W1b (W1c and W1d) can be easily fixed to the lens frame 2.

【0033】次に、対物レンズ支持装置1における、ワ
イヤ固定部材25,26により先端部がレンズ枠2に固
定されたワイヤ状弾性部材W1a〜W1dの配置につい
て説明する。なお、レンズ枠2の上面のワイヤ状弾性部
材W1a,W1bの組と、下面のワイヤ状弾性部材W1
c,W1dの組とは水平面に対して上下対称であるの
で、レンズ枠2の上面側で固定されたワイヤ状弾性部材
W1a、W1bの組の配置についてのみ説明し、下面の
ワイヤ状弾性部材W1c,W1dの組の説明は省略す
る。
Next, the arrangement of the wire-like elastic members W1a to W1d of which the tips are fixed to the lens frame 2 by the wire fixing members 25 and 26 in the objective lens supporting device 1 will be described. The set of the wire-like elastic members W1a and W1b on the upper surface of the lens frame 2 and the wire-like elastic member W1 on the lower surface.
Since the pair of c and W1d is vertically symmetrical with respect to the horizontal plane, only the arrangement of the pair of wire-shaped elastic members W1a and W1b fixed on the upper surface side of the lens frame 2 will be described, and the wire-shaped elastic member W1c on the lower surface will be described. , W1d will be omitted.

【0034】図5に示すように、ワイヤ状弾性部材W1
a、W1bは、平面視ハ字状となるように、互いの先端
部に向かって漸次接近し、これら左右のワイヤ状弾性部
材W1a,W1bの延長線上の交点Kが、対物レンズ2
1の中心Sと、トラッキングコイルC2を介して回転す
るレンズ枠2の回動中心Rとの間の位置、ここでは両者
の中点の位置となるように配置されている。このよう
に、レンズ枠2を支持するワイヤ状弾性部材が、上下2
本ずつで、それぞれ左右のワイヤ状弾性部材(W1aと
W1b、W1cとW1d)どうしが平面視ハ字状に配置
された状態となっているので、対物レンズ支持装置1自
体を支持基体3をディスクの半径方向に移動、つまりト
ラック方向に変位させた際でも、上下とも平行なワイヤ
状弾性部材で支持された従来に比べて、慣性力によりワ
イヤ状弾性部材は変形しない。このため、所定のトラッ
クの情報を読み取るために、対物レンズ支持装置1自体
を所定のトラック上に移動させて、対物レンズ21をフ
ォーカス方向及びトラッキング方向に移動させることで
前記所定のトラック上に正確に光ビームスポットを照射
する制御を確実に行えるようになっている。
As shown in FIG. 5, the wire-shaped elastic member W1
a and W1b gradually approach each other so as to have an inverted V shape in a plan view, and an intersection point K on an extension line of the left and right wire-shaped elastic members W1a and W1b is set to the objective lens 2
It is arranged so as to be at a position between the center S of 1 and the rotation center R of the lens frame 2 which rotates via the tracking coil C2, which is the midpoint between the two in this case. In this way, the wire-like elastic member supporting the lens frame 2 is
Since the left and right wire-shaped elastic members (W1a and W1b, W1c and W1d) are arranged in a V shape in a plan view, the objective lens supporting device 1 itself is supported by the supporting substrate 3 and the supporting substrate 3 is a disk. Even when the wire-shaped elastic member is moved in the radial direction, that is, displaced in the track direction, the wire-shaped elastic member is not deformed by the inertial force as compared with the conventional case in which the wire-shaped elastic member is supported both vertically. Therefore, in order to read information on a predetermined track, the objective lens supporting device 1 itself is moved onto a predetermined track, and the objective lens 21 is moved in the focus direction and the tracking direction, so that the target lens is accurately moved onto the predetermined track. It is possible to reliably control the irradiation of the light beam spot.

【0035】次に、本実施形態に係る対物レンズ支持装
置の動作について説明する。図示しない光ピックアップ
制御装置の制御により、ワイヤ状弾性部材W1a〜dを
介してフォーカスコイルC1に通電されると、フォーカ
スコイルC1と駆動用磁石35の作用により垂直方向の
駆動力を生じ、レンズ枠2は図2の矢印A方向に移動せ
られ、焦点合わせ動作(フォーカシング)が行われる。
この際に、ワイヤ状弾性部材W1a〜dは変形してレン
ズ枠2の垂直方向の移動に追従するが、W1aとW1
b、W1cとW1dは、それぞれ水平状態での延長線の
交点Kが対物レンズ21の中心Sとトラッキングコイル
C2によるレンズ枠2自体の回転中心Rとの中点に位置
するように、先端部でワイヤ固定部材25,26により
回転中心R近傍で且つ対物レンズ21側よりの位置に、
それぞれ固定されているため、ローリングやピッチング
などのフォーカシングに悪影響を及ぼす変位を生じ難
く、対物レンズ21からの光ビームスポットの焦点位置
を所定のトラック上に正確に合わせることができる。
Next, the operation of the objective lens support device according to this embodiment will be described. When the focus coil C1 is energized through the wire-shaped elastic members W1a to Wd by the control of the optical pickup control device (not shown), the focus coil C1 and the driving magnet 35 act to generate a vertical driving force, and the lens frame. 2 is moved in the direction of arrow A in FIG. 2 to perform a focusing operation (focusing).
At this time, the wire-shaped elastic members W1a to W1d are deformed and follow the vertical movement of the lens frame 2.
b, W1c, and W1d are the tip portions such that the intersection K of the extension lines in the horizontal state is located at the midpoint between the center S of the objective lens 21 and the rotation center R of the lens frame 2 itself by the tracking coil C2. By the wire fixing members 25 and 26, at a position near the rotation center R and from the objective lens 21 side,
Since they are fixed, displacements that adversely affect focusing such as rolling and pitching are unlikely to occur, and the focal position of the light beam spot from the objective lens 21 can be accurately aligned on a predetermined track.

【0036】また、ワイヤ状弾性部材W1a〜dを介し
てトラッキングコイルC2,C2に通電されると、トラ
ッキングコイルC2,C2と駆動用磁石35の作用によ
り水平方向の駆動力を生じ、レンズ枠2は図1の矢印B
方向に移動させられ、ディスク上の所望のトラックへの
位置合わせを行うトラッキングが行われる。
When the tracking coils C2, C2 are energized via the wire-shaped elastic members W1a-d, the tracking coils C2, C2 and the driving magnet 35 act to generate a horizontal driving force, and the lens frame 2 Is arrow B in FIG.
Tracking is performed by moving the disk in the direction and aligning it with a desired track on the disk.

【0037】ここで、レンズ枠2の水平方向の動きを図
5を参照して説明する。トラッキングコイルC2,C2
と駆動用磁石35の作用により水平方向の駆動力を生じ
た場合に、ワイヤ状弾性部材W1a〜dによって支持さ
れているレンズ枠2は、S(回転中心)を中心に回転す
る。詳細には、トラッキングコイルC2,C2に互いに
逆方向の力がかかるように電流を流す。これにより駆動
力を得たレンズ枠2により左右のワイヤ状弾性部材のう
ちの一方のワイヤ状弾性部材は内側に撓み、他方のワイ
ヤ状弾性部材は外側に撓み、レンズ枠2自体はSを中心
に回転する。このレンズ枠2の回転とともに、該レンズ
枠2のレンズホルダ24に設けられた対物レンズ21は
トラック方向に変位する。
The horizontal movement of the lens frame 2 will be described with reference to FIG. Tracking coils C2, C2
When a horizontal driving force is generated by the action of the driving magnet 35, the lens frame 2 supported by the wire-shaped elastic members W1a to W1d rotates about S (center of rotation). Specifically, the currents are applied so that the tracking coils C2 and C2 are applied with forces in opposite directions. Due to the lens frame 2 which has obtained the driving force, one of the left and right wire-shaped elastic members is bent inward, the other wire-shaped elastic member is bent outward, and the lens frame 2 itself is centered on S. Rotate to. With this rotation of the lens frame 2, the objective lens 21 provided on the lens holder 24 of the lens frame 2 is displaced in the track direction.

【0038】このように、ワイヤ状弾性部材W1aとW
1b、W1cとW1dがそれぞれ水平状態での延長線の
交点が対物レンズ21の中心とトラッキングコイルC2
によるレンズ枠2自体の回転中心との中点に位置するよ
うに配置され、先端部が回転中心S近傍で且つ対物レン
ズ21側の位置でワイヤ固定部材25,26にそれぞれ
固定されているため、図示しない対物レンズ支持装置1
自体がディスクのトラック方向に移動され所定のトラッ
ク上に位置した直後でも、ワイヤ状弾性部材W1aとW
1b、W1cとW1dが撓みレンズ枠2が所定角度回転
することで対物レンズの光軸をトラッキング方向に移動
させ正確にトラック方向の位置あわせ制御を行うことが
できる。また、従来の上下2対のワイヤ状弾性部材を平
行状態で延設した構成に比して、ローリングやピッチン
グなどのトラッキングに悪影響を及ぼす変位を生じ難く
することができる。
Thus, the wire-like elastic members W1a and W1
1b, W1c, and W1d are horizontal, and the intersections of the extension lines are the center of the objective lens 21 and the tracking coil C2.
Is arranged so as to be located at a midpoint between the rotation center of the lens frame 2 itself and the tip end portion thereof is fixed to the wire fixing members 25 and 26 near the rotation center S and at the position on the objective lens 21 side, respectively. Objective lens support device 1 not shown
Even immediately after itself is moved in the track direction of the disk and positioned on a predetermined track, the wire-like elastic members W1a and W1a
1b, W1c, and W1d are bent, and the optical axis of the objective lens is moved in the tracking direction by rotating the lens frame 2 by a predetermined angle, so that alignment control in the track direction can be accurately performed. Further, as compared with the conventional configuration in which two pairs of upper and lower wire-shaped elastic members are extended in parallel, it is possible to make it difficult to cause displacement such as rolling and pitching, which adversely affects tracking.

【0039】上記構成の対物レンズ支持装置1によれ
ば、トラッキングの高速追従性が確保されつつ、従来の
上下2対のワイヤ状弾性部材を平行状態で延設した構成
に比して装置自体の移動による慣性力を受けにくくロー
リングやピッチングなどのトラッキングに悪影響を及ぼ
す変位を生じ難くすることができる。詳細には、対物レ
ンズ支持装置自体の移動後でもその慣性力によるレンズ
枠自体のトラック方向の変位は極めて小さく慣性力補正
などが必要なく、従来の上下2対のワイヤ状弾性部材を
平行状態で延設した構成に比してトラッキングの追従性
を向上させることができる。よって、例えば振動の多い
車載用のCD機器やDVD機器等へ適用することも可能
となる。
According to the objective lens supporting device 1 having the above-described structure, the high-speed tracking of the tracking is ensured, and in comparison with the conventional structure in which two pairs of upper and lower wire-like elastic members are extended in parallel, It is possible to prevent an inertial force due to movement from being easily received, and to prevent displacement such as rolling and pitching, which adversely affects tracking, from occurring. More specifically, the displacement of the lens frame itself in the track direction due to its inertial force is extremely small even after the movement of the objective lens supporting device itself, and the inertial force correction is not required. Tracking followability can be improved as compared with the extended structure. Therefore, it can be applied to, for example, a vehicle-mounted CD device, a DVD device, or the like that has a lot of vibration.

【0040】以上本発明を実施形態に基づき具体的に説
明したが、本発明は上記実施形態に限定されるものでは
なく、その要旨を逸脱しない範囲で変更可能である。例
えば、本実施形態に係る対物レンズ支持装置では、ワイ
ヤ状弾性部材を上下2対の4本(W1a〜d)でレンズ
枠2を支持する場合について述べたが、これに限らず、
左右一対のワイヤ状弾性部材(W1aとW1bまたはW
1cとW1d)で構成することも可能である。
Although the present invention has been specifically described above based on the embodiments, the present invention is not limited to the above embodiments and can be modified within the scope of the invention. For example, in the objective lens supporting device according to the present embodiment, the case where the lens frame 2 is supported by the upper and lower two pairs of four wires (W1a to d) has been described, but the present invention is not limited to this.
Left and right pair of wire-like elastic members (W1a and W1b or W
1c and W1d).

【0041】また、レンズ枠2に設けられるワイヤ固定
部材25,26は、支持基体3にレンズ枠2を方持ち状
態で支持させるワイヤ状弾性部材W1a〜W1dが、平
面視してハ字状に配置され、且つ、ハ字状に配置された
左右のワイヤ状弾性部材(W1aとW1b、W1cとW
1d)の交点が、対物レンズ21をトラック方向に移動
させるために回転するレンズ枠本体22の回転中心と、
対物レンズ21のレンズ中心との中点部分に位置してい
れば、どのように構成されていてもよい。その変形例を
図6及び図7に示す。
In the wire fixing members 25 and 26 provided on the lens frame 2, the wire-like elastic members W1a to W1d for supporting the lens frame 2 on the supporting base 3 in a cantilevered state are formed in a V shape in plan view. The left and right wire-shaped elastic members (W1a and W1b, W1c and W) that are arranged in a V shape.
1d) intersects with the center of rotation of the lens frame main body 22 that rotates to move the objective lens 21 in the track direction,
Any configuration may be adopted as long as it is located at the midpoint between the objective lens 21 and the lens center. A modified example thereof is shown in FIGS. 6 and 7.

【0042】図6に示すワイヤ固定部材27は、レンズ
枠本体22の上面に、光軸と垂直な方向、トラッキング
移動する方向に延在し、且つ上方に突出して設けられた
突出部271と、突出部271の略中央部に結合され、
結合部分から支持部3b側に延在する平面視等脚台形状
の本体部272とを有する。
The wire fixing member 27 shown in FIG. 6 has a protrusion 271 provided on the upper surface of the lens frame main body 22 so as to extend in the direction perpendicular to the optical axis and the direction of tracking movement, and to protrude upward. Is coupled to the substantially central portion of the protrusion 271,
The main body 272 has an isosceles trapezoidal shape in plan view and extends from the coupling portion to the support portion 3b side.

【0043】突出部271の支持部側の側面には、ワイ
ヤ状弾性部材の先端が挿入される挿入孔271aが本体
部272に対して左右対称に形成されている。また、挿
入孔271aが設けられた支持部側の側面と隣り合う本
体部272の両側面は、それぞれ挿入孔271aに先端
が挿入されたワイヤ状弾性部材の先端部分が半田付けに
より固着される固着部となっている。この構成により、
ワイヤ状弾性部材W1a,W1bをワイヤ固定部材27
に半田付けする際に、側方から半田付けできる。つま
り、容易にワイヤ状弾性部材W1a,W1bをレンズ枠
2に固定し、該レンズ枠2を支持させることができる。
なお、このようにワイヤ状弾性部材が取り付けられたレ
ンズ支持装置では、レンズ枠2を支持する4本のワイヤ
状弾性部材のうち、下側の左右一対のワイヤ状弾性部材
W1c,W1dも、図7に示すように、ワイヤ固定部材
27と同様に形成された固定部材28を介してレンズ枠
2の下面、詳細にはコイル取付部23の下面に、ワイヤ
固定部材27と同一垂直線上で、且つワイヤ固定部材2
7と同様に取り付けられたものとなっている。
An insertion hole 271 a into which the tip of the wire-shaped elastic member is inserted is formed symmetrically with respect to the main body portion 272 on the side surface of the protruding portion 271 on the support portion side. Further, on both side surfaces of the main body portion 272 adjacent to the side surface on the side of the supporting portion where the insertion hole 271a is provided, the tip end portion of the wire-like elastic member whose tip is inserted into the insertion hole 271a is fixed by soldering. It is a division. With this configuration,
The wire elastic members W1a and W1b are connected to the wire fixing member 27.
When soldering to, it can be soldered from the side. That is, the wire-shaped elastic members W1a and W1b can be easily fixed to the lens frame 2 to support the lens frame 2.
In the lens supporting device to which the wire-shaped elastic members are attached in this manner, among the four wire-shaped elastic members that support the lens frame 2, the pair of lower left and right wire-shaped elastic members W1c and W1d are also shown in FIG. As shown in FIG. 7, on the lower surface of the lens frame 2, more specifically, the lower surface of the coil mounting portion 23, via the fixing member 28 formed similarly to the wire fixing member 27, on the same vertical line as the wire fixing member 27, and Wire fixing member 2
It is attached in the same manner as 7.

【0044】このように、前記本体部272は、それぞ
れ左右のワイヤ状弾性部材W1aとW1b(W1cとW
1d)の先端が挿入される挿入孔271a,271aの
間に配置され、両側面が左右のワイヤ状弾性部材W1a
とW1b(W1cとW1d)の先端部に隣接した構成と
なっているので、左右のワイヤ状弾性部材W1aとW1
b(W1cとW1d)の先端部をそれぞれ側方から本体
部272の両側面(固着部)に半田付けすることがで
き、ワイヤ状弾性部材W1aとW1b(W1cとW1
d)をレンズ枠2に容易に固定することができる。
As described above, the main body portion 272 includes the wire-shaped elastic members W1a and W1b (W1c and W1) on the left and right, respectively.
1d) is disposed between the insertion holes 271a and 271a into which the tip ends are inserted, and the wire-shaped elastic member W1a has left and right side surfaces.
And W1b (W1c and W1d) are adjacent to the tip end portions of the wire-shaped elastic members W1a and W1.
The tip portions of b (W1c and W1d) can be soldered to the both side surfaces (fixed portions) of the main body 272 from the side, respectively, and the wire-shaped elastic members W1a and W1b (W1c and W1) can be soldered.
d) can be easily fixed to the lens frame 2.

【0045】[0045]

【発明の効果】本発明に従うと、トラッキングの高速追
従性が確保されつつ、従来の上下2対のワイヤ状弾性部
材を平行状態で延設した構成に比して装置自体の移動に
よる慣性力を受けにくくローリングやピッチングなどの
トラッキングに悪影響を及ぼす変位を生じ難くすること
ができる。詳細には、対物レンズ支持装置自体の移動後
でもその慣性力によるレンズ枠自体のトラック方向の変
位は極めて小さく慣性力補正などが必要なく、従来の上
下2対のワイヤ状弾性部材を平行状態で延設した構成に
比してトラッキングの追従性を向上させることができ
る。
According to the present invention, the high-speed tracking capability of tracking is ensured, and the inertial force due to the movement of the apparatus itself is compared with the conventional structure in which two pairs of upper and lower wire-shaped elastic members are extended in parallel. It is possible to make it difficult to generate a displacement that is hard to receive and adversely affects tracking such as rolling and pitching. More specifically, the displacement of the lens frame itself in the track direction due to its inertial force is extremely small even after the movement of the objective lens supporting device itself, and the inertial force correction is not required. Tracking followability can be improved as compared with the extended structure.

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

【図1】本実施形態に係る対物レンズ支持装置の詳細な
構成を示す分解斜視図である。
FIG. 1 is an exploded perspective view showing a detailed configuration of an objective lens support device according to this embodiment.

【図2】本実施形態に係る対物レンズ支持装置の要部の
概略構成を示す図であり、装置の要部を上側から見た図
である。
FIG. 2 is a diagram showing a schematic configuration of a main part of an objective lens support device according to the present embodiment, and is a view of the main part of the device seen from above.

【図3】本実施形態に係る対物レンズ支持装置の要部の
概略構成を示す図であり、装置の要部を下側から見た図
である。
FIG. 3 is a diagram showing a schematic configuration of a main part of an objective lens support device according to the present embodiment, and is a view of the main part of the device as seen from below.

【図4】レンズ枠にワイヤ状弾性部材を取り付けた状態
を示すワイヤ固定部材の概略側面図である。
FIG. 4 is a schematic side view of the wire fixing member showing a state where the wire-shaped elastic member is attached to the lens frame.

【図5】本実施の形態の対物レンズ支持装置においてレ
ンズ枠を支持するワイヤ状弾性部材の配置を示す概略平
面図である。
FIG. 5 is a schematic plan view showing the arrangement of wire-like elastic members that support the lens frame in the objective lens support device of the present embodiment.

【図6】ワイヤ固定部材の変形例を備えた対物レンズ支
持装置の要部の概略構成を示す図であり、装置の要部を
上側から見た図である。
FIG. 6 is a view showing a schematic configuration of a main part of an objective lens supporting device including a modified example of a wire fixing member, and is a view of the main part of the device as viewed from above.

【図7】図6の対物レンズ支持装置の要部を下側から見
た図である。
7 is a view of the main part of the objective lens support device of FIG. 6 viewed from below.

【図8】従来のワイヤ支持型の対物レンズ支持装置の構
成例の要部を示す斜視図である。
FIG. 8 is a perspective view showing a main part of a configuration example of a conventional wire supporting type objective lens supporting device.

【図9】従来のワイヤ支持型の対物レンズ支持装置の構
成例の詳細を示す斜視図である。
FIG. 9 is a perspective view showing details of a configuration example of a conventional wire support type objective lens support device.

【符号の説明】[Explanation of symbols]

1 対物レンズ支持装置 2 レンズ枠 3 支持基体 21 対物レンズ 25,26,27,28 ワイヤ固定部材 251,261 突条部(突出部) 271 突出部 251a,261a、271a 挿入孔 252,262 固着板部(固着部) 272 本体部(固着部) 35 駆動用磁石(駆動力を発生させる手段) W1a〜d ワイヤ状弾性部材 C2 トラッキングコイル(駆動力を受ける手段) S 対物レンズ中心 R 回転中心 K 交点 1 Objective lens support device 2 lens frame 3 Support substrate 21 Objective lens 25, 26, 27, 28 Wire fixing member 251 and 261 ridge (projection) 271 protrusion 251a, 261a, 271a insertion holes 252, 262 fixing plate part (fixing part) 272 Body part (fixed part) 35 Driving Magnet (Means for Generating Driving Force) W1a-d Wire-like elastic member C2 tracking coil (means for receiving driving force) S Objective lens center R center of rotation K intersection

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 ディスク型媒体上を移動することで、前
記ディスク型媒体に同心円若しくはスパイラル上に多数
形成されたトラックへの光ビームスポットの焦点合わせ
および位置合わせを行うための光ピックアップの対物レ
ンズ支持装置において、 対物レンズが取付けられ、回転することで前記対物レン
ズの光軸を光軸方向に垂直なトラック方向に変位させる
レンズ枠と、前記レンズ枠に設けられ、該レンズ枠を回
転させる駆動力を受ける手段と、前記レンズ枠に設けら
れる前記駆動力を受ける手段に対して駆動力を発生させ
る手段が設けられる光ピックアップ本体の支持基体と、
前記支持基体から延設され、先端部が前記レンズ枠の上
下面にそれぞれ設けられたワイヤ固定部材に固定され
て、前記レンズ枠を片持ち状態で揺動可能に支持する上
下2対のワイヤ状弾性部材とを備え、 前記上下2対のワイヤ状弾性部材は、レンズ枠の高さ方
向に対しては上下で互いに平行に配置され、横方向に対
しては非平行で且つ前記対物レンズ中心及びレンズ枠の
回転中心を通る垂直な平面に対して対称となるように、
互いの先端部に向かって漸次接近して配置されていると
ともに、先端部に向かって漸次接近する左右のワイヤ状
弾性部材の延長線上の交点が、前記対物レンズの中心と
前記回動中心との間の中点に位置し、 前記上下面に設けられたワイヤ固定部材は、それぞれ取
り付けられた面から離間する方向に突出して設けられ、
前記ワイヤ状弾性部材の先端が挿入される挿入孔を備え
る突出部と、前記突出部に隣接し、該突出部の挿入孔に
先端が挿入されたワイヤ状弾性部材の先端部分が半田付
けにより固着される固着部とを備え、前記固着部は、前
記左右のワイヤ状弾性部材の先端が挿入される挿入孔の
間で、且つ前記左右のワイヤ状弾性部材の先端部に隣接
して配置され、前記ワイヤ状弾性部材の先端部は、前記
回転中心より前記対物レンズ側の位置で前記固着部の表
面側から半田付けされていることを特徴とする対物レン
ズ支持装置。
1. An objective lens of an optical pickup for focusing and positioning a light beam spot on a plurality of tracks formed concentrically or spirally on the disk type medium by moving the disk type medium. In a supporting device, an objective lens is attached, and a lens frame for displacing the optical axis of the objective lens in a track direction perpendicular to the optical axis direction by rotating the lens frame, and a drive provided on the lens frame for rotating the lens frame A means for receiving a force, a support base of the optical pickup body provided with means for generating a driving force with respect to the means for receiving the driving force provided on the lens frame,
Two pairs of upper and lower wires extending from the supporting base and having tip portions fixed to wire fixing members respectively provided on the upper and lower surfaces of the lens frame to swingably support the lens frame in a cantilever state. And a pair of upper and lower wire-shaped elastic members which are arranged parallel to each other vertically with respect to the height direction of the lens frame, are non-parallel with respect to the lateral direction, and have the objective lens center and To be symmetric with respect to a vertical plane that passes through the center of rotation of the lens frame,
The intersections on the extension lines of the left and right wire-shaped elastic members which are arranged so as to gradually approach each other toward the distal ends thereof and which gradually approach toward the distal ends, form the center of the objective lens and the rotation center. Positioned at the midpoint between, the wire fixing members provided on the upper and lower surfaces are provided so as to project in a direction away from the respective attached surfaces,
A protrusion having an insertion hole into which the tip of the wire-like elastic member is inserted, and a tip portion of the wire-like elastic member that is adjacent to the protrusion and has its tip inserted into the insertion hole of the protrusion is fixed by soldering. And a fixed portion disposed between the insertion holes into which the tips of the left and right wire-shaped elastic members are inserted and adjacent to the tip portions of the left and right wire-shaped elastic members, The objective lens supporting device, wherein a tip end portion of the wire-like elastic member is soldered from a surface side of the fixing portion at a position closer to the objective lens than the rotation center.
【請求項2】 ディスク型媒体上を移動することで、前
記ディスク型媒体に同心円若しくはスパイラル上に多数
形成されたトラックへの光ビームスポットの焦点合わせ
および位置合わせを行うための光ピックアップの対物レ
ンズ支持装置において、 対物レンズが取付けられ、回転することで前記対物レン
ズの光軸を光軸方向に垂直なトラック方向に変位させる
レンズ枠と、前記レンズ枠に設けられ、該レンズ枠を回
転させる駆動力を受ける手段と、前記レンズ枠に設けら
れる前記駆動力を受ける手段に対して駆動力を発生させ
る手段が設けられる光ピックアップ本体の支持基体と、
前記支持基体から延設され、先端部が前記レンズ枠の上
下面にそれぞれ設けられたワイヤ固定部材に固定され
て、前記レンズ枠を片持ち状態で揺動可能に支持する上
下2対のワイヤ状弾性部材とを備え、 前記上下2対のワイヤ状弾性部材は、レンズ枠の高さ方
向に対しては上下で互いに平行に配置され、横方向に対
しては非平行で且つ前記対物レンズ中心及び前記レンズ
枠の回転中心を通る垂直な平面に対して対称となるよう
に、互いの先端部に向かって漸次接近して配置されてい
るとともに、先端部に向かって漸次接近する左右のワイ
ヤ状弾性部材の延長線上の交点が、前記対物レンズの中
心と前記回動中心との間の中点に位置し、 前記上下面に設けられたワイヤ固定部材は、それぞれ取
り付けられた面から離間する方向に突出して設けられ、
前記ワイヤ状弾性部材の先端が挿入される挿入孔を備え
る突出部と、前記突出部に隣接し、該突出部の挿入孔に
先端が挿入されたワイヤ状弾性部材の先端部分が半田付
けにより固着される固着部とを備え、前記固着部は、前
記左右のワイヤ状弾性部材の先端が挿入される挿入孔と
前記ワイヤ固定部材が取り付けられた面との間に配置さ
れるとともに、前記左右のワイヤ状弾性部材の先端部に
隣接して配置され、前記ワイヤ状弾性部材の先端部は、
前記回転中心より前記対物レンズ側の位置で、前記固着
部の表面側から半田付けされていることを特徴とする対
物レンズ支持装置。
2. An objective lens of an optical pickup for focusing and aligning a light beam spot on a plurality of tracks formed concentrically or spirally on the disk medium by moving on the disk medium. In a supporting device, an objective lens is attached, and a lens frame for displacing the optical axis of the objective lens in a track direction perpendicular to the optical axis direction by rotating the lens frame, and a drive provided on the lens frame for rotating the lens frame A means for receiving a force, a support base of the optical pickup body provided with means for generating a driving force with respect to the means for receiving the driving force provided on the lens frame,
Two pairs of upper and lower wires extending from the supporting base and having tip portions fixed to wire fixing members respectively provided on the upper and lower surfaces of the lens frame to swingably support the lens frame in a cantilever state. And a pair of upper and lower wire-shaped elastic members which are arranged parallel to each other vertically with respect to the height direction of the lens frame, are non-parallel with respect to the lateral direction, and have the objective lens center and The left and right wire-shaped elastic members are arranged so as to be gradually closer to each other so as to be symmetrical with respect to a vertical plane that passes through the rotation center of the lens frame, and are gradually closer to each other. The intersection on the extension line of the member is located at the midpoint between the center of the objective lens and the center of rotation, and the wire fixing members provided on the upper and lower surfaces are separated from the respective attached surfaces. Provided protruding It is,
A protrusion having an insertion hole into which the tip of the wire-like elastic member is inserted, and a tip portion of the wire-like elastic member that is adjacent to the protrusion and has its tip inserted into the insertion hole of the protrusion is fixed by soldering. The fixing portion is disposed between the insertion hole into which the tips of the left and right wire-shaped elastic members are inserted and the surface on which the wire fixing member is attached, and the left and right fixing portions are provided. The wire-shaped elastic member is disposed adjacent to the tip thereof, and the tip of the wire-shaped elastic member is
The objective lens supporting device is characterized in that it is soldered from the surface side of the fixing portion at a position closer to the objective lens than the center of rotation.
【請求項3】 ディスク型媒体上を移動することで、前
記ディスク型媒体に同心円若しくはスパイラル上に多数
形成されたトラックへの光ビームスポットの焦点合わせ
および位置合わせを行うための光ピックアップの対物レ
ンズ支持装置において、 前記ディスク型媒体に光ビームを照射する対物レンズが
取付けられ、回転することで前記対物レンズの光軸を光
軸方向に垂直なトラック方向に変位させるレンズ枠と、
前記レンズ枠に設けられ、該レンズ枠を回転させる駆動
力を受ける手段と、前記レンズ枠に設けられる前記駆動
力を受ける手段に対して駆動力を発生させる手段が設け
られる光ピックアップ本体の支持基体と、前記支持基体
から延設され、先端部が前記レンズ枠に設けられたワイ
ヤ固定部材に前記レンズ枠の回転中心より前記対物レン
ズ側の位置で固定されて、該レンズ枠を片持ち状態で揺
動可能に支持する左右1対または上下2対のワイヤ状弾
性部材とを備え、 前記左右1対または上下2対のワイヤ状弾性部材のうち
左右のワイヤ状弾性部材どうしは、非平行で且つ前記対
物レンズ中心及び回転中心を通る垂直な平面に対して対
称となるように、互いの先端部に向かって漸次接近し、
これら左右のワイヤ状弾性部材の延長線上の交点が、前
記対物レンズの中心と前記レンズ枠の回動中心との間に
位置するように配置されていることを特徴とする対物レ
ンズ支持装置。
3. An objective lens of an optical pickup for focusing and aligning a light beam spot on a plurality of tracks formed concentrically or spirally on the disk type medium by moving the disk type medium. In the supporting device, an objective lens for irradiating a light beam to the disk-shaped medium is attached, and a lens frame for displacing the optical axis of the objective lens in a track direction perpendicular to the optical axis direction by rotating,
A support base for an optical pickup main body, which is provided in the lens frame and receives a driving force for rotating the lens frame, and a unit for generating a driving force with respect to the driving force receiving unit provided in the lens frame. And the tip end portion is fixed to a wire fixing member provided on the lens frame at a position closer to the objective lens than the rotation center of the lens frame, and the lens frame is cantilevered. A pair of left and right wire-like elastic members that swingably support the left and right wire-like elastic members among the pair of left and right wire-like elastic members and two pairs of upper and lower wire-like elastic members are non-parallel and In order to be symmetric with respect to a vertical plane passing through the center of the objective lens and the center of rotation, they gradually approach each other toward their tips,
An objective lens support device, characterized in that the intersections on the extension lines of the left and right wire-like elastic members are located between the center of the objective lens and the center of rotation of the lens frame.
【請求項4】 請求項3記載の対物レンズ支持装置にお
いて、 前記左右のワイヤ状弾性部材の延長線上の交点が、前記
対物レンズの中心と前記レンズ枠の回動中心との間の中
点となるように、前記左右のワイヤ状弾性部材が前記ワ
イヤ固定部材を介して前記レンズ枠に固定されているこ
とを特徴とする対物レンズ支持装置。
4. The objective lens support device according to claim 3, wherein an intersection of extension lines of the left and right wire-like elastic members is a midpoint between a center of the objective lens and a rotation center of the lens frame. As described above, the left and right wire-like elastic members are fixed to the lens frame via the wire fixing members.
【請求項5】 請求項3または4記載の対物レンズ支持
装置において、 前記レンズ枠は、前記支持基体から延出された上下2対
のワイヤ状弾性部材により揺動可能に支持され、 前記上下2対のワイヤ状弾性部材は、レンズ枠の高さ方
向に対して上下で互いに平行となるように配置されると
ともに、先端部が前記レンズ枠の上下面に夫々設けられ
たワイヤ固定部材に固定され、 これら上下面のワイヤ固定部材のそれぞれは、前記上面
及び下面から離間する方向に突出し、前記ワイヤ状弾性
部材の先端が挿入される挿入孔を備える突出部と、前記
突出部に隣接して設けられ該突出部の挿入孔に先端が挿
入されたワイヤ状弾性部材の先端部分が半田付けにより
固着される固着部とを備え、 前記固着部は、ワイヤ状弾性部材の先端部分を前記レン
ズ枠の上方、下方または側方のうちいずれか一方から半
田付けにより固着可能な位置に配置されていることを特
徴とする対物レンズ支持装置。
5. The objective lens support device according to claim 3, wherein the lens frame is swingably supported by two pairs of upper and lower wire-shaped elastic members extending from the support base. The pair of wire-shaped elastic members are arranged so as to be parallel to each other vertically with respect to the height direction of the lens frame, and the tips are fixed to the wire fixing members provided on the upper and lower surfaces of the lens frame, respectively. Each of the wire fixing members on the upper and lower surfaces is provided adjacent to the projecting portion, which projects in a direction away from the upper surface and the lower surface and has an insertion hole into which the tip of the wire-like elastic member is inserted. And a fixing portion to which a tip portion of the wire-shaped elastic member whose tip is inserted in the insertion hole of the protrusion is fixed by soldering, and the fixing portion includes the tip portion of the wire-shaped elastic member to the lens. Above, the objective lens supporting device, characterized in that disposed in a securable position by soldering from either the lower or lateral.
【請求項6】 請求項5記載の対物レンズ支持装置にお
いて、 前記固着部は、前記左右のワイヤ状弾性部材の先端が挿
入される挿入孔の間で、且つ前記左右のワイヤ状弾性部
材の先端部に隣接して配置されていることを特徴とする
対物レンズの支持装置。
6. The objective lens supporting device according to claim 5, wherein the fixing portion is between the insertion holes into which the tips of the left and right wire-like elastic members are inserted, and the tips of the left and right wire-like elastic members. An apparatus for supporting an objective lens, which is arranged adjacent to the section.
【請求項7】 請求項5記載の対物レンズ支持装置にお
いて、 前記固着部は、前記左右のワイヤ状弾性部材の先端が挿
入される挿入孔と前記ワイヤ固定部材が取り付けられた
上面及び下面のそれぞれとの間に配置されるとともに、
前記左右のワイヤ状弾性部材の先端部に隣接して配置さ
れていることを特徴とする対物レンズ支持装置。
7. The objective lens supporting device according to claim 5, wherein the fixing portion has an insertion hole into which the tips of the left and right wire-like elastic members are inserted, and an upper surface and a lower surface to which the wire fixing member is attached, respectively. It is placed between and
An objective lens support device, wherein the objective lens support device is arranged adjacent to the tip ends of the left and right wire-shaped elastic members.
JP2001315918A 2001-10-12 2001-10-12 Device for supporting objective lens Pending JP2003123289A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001315918A JP2003123289A (en) 2001-10-12 2001-10-12 Device for supporting objective lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001315918A JP2003123289A (en) 2001-10-12 2001-10-12 Device for supporting objective lens

Publications (1)

Publication Number Publication Date
JP2003123289A true JP2003123289A (en) 2003-04-25

Family

ID=19134013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001315918A Pending JP2003123289A (en) 2001-10-12 2001-10-12 Device for supporting objective lens

Country Status (1)

Country Link
JP (1) JP2003123289A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7593294B2 (en) 2004-06-17 2009-09-22 Funai Electric Co., Ltd. Optical pickup

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7593294B2 (en) 2004-06-17 2009-09-22 Funai Electric Co., Ltd. Optical pickup

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