JPH09265647A - Optical pickup and its assembling method - Google Patents
Optical pickup and its assembling methodInfo
- Publication number
- JPH09265647A JPH09265647A JP7030996A JP7030996A JPH09265647A JP H09265647 A JPH09265647 A JP H09265647A JP 7030996 A JP7030996 A JP 7030996A JP 7030996 A JP7030996 A JP 7030996A JP H09265647 A JPH09265647 A JP H09265647A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- driving device
- lens driving
- optical pickup
- movable plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Optical Head (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、記録媒体である光
ディスクに、情報を記録再生するための光ピックアップ
装置に係り、特に、対物レンズ傾き調整機構にかかる部
分を改良した光ピックアップ装置及びその組立方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical pickup device for recording / reproducing information on / from an optical disc which is a recording medium, and more particularly to an optical pickup device and its assembly in which a portion related to an objective lens tilt adjusting mechanism is improved. Regarding the method.
【０００２】[0002]
【従来の技術】光ピックアップ装置は、一般に、対物レ
ンズを光ディスクのトラッキング方向やフォーカス方向
に移動させる対物レンズ駆動装置と、取付台上に光源や
受光部等が設けられ、対物レンズを介して、光ディスク
にレーザ光を投射し、その反射光を検出する光学系ブロ
ックとから構成され、前記対物レンズ駆動装置は、光学
系ブロックの取付台上に設置されている。2. Description of the Related Art In general, an optical pickup device is provided with an objective lens driving device for moving an objective lens in a tracking direction and a focusing direction of an optical disc, a light source, a light receiving portion and the like on a mounting base, and through an objective lens, An optical system block that projects a laser beam onto an optical disc and detects the reflected light thereof is provided. The objective lens driving device is installed on a mount of the optical system block.
【０００３】ところで、光ディスクに対する情報の記録
再生を正確に行うためには、対物レンズの光軸が、光デ
ィスクのディスク面に対して垂直となるように設定する
必要があり、その設定は、上記対物レンズ駆動装置を光
学系ブロックの取付台上に配置するときの傾きによって
調整している。In order to accurately record / reproduce information on / from the optical disc, it is necessary to set the optical axis of the objective lens to be perpendicular to the disc surface of the optical disc. It is adjusted by the inclination when the lens driving device is arranged on the mount of the optical system block.
【０００４】ここで、上記対物レンズの傾きを調整する
部分（以下、対物レンズ傾き調整機構という）は、光学
系ブロックの取付台上の対物レンズ駆動装置を配置する
部分に設けられ、対物レンズ駆動装置は対物レンズ傾き
調整機構を介して取付台上に設置されている。従って、
光ピックアップの薄型化が困難であった。Here, a portion for adjusting the inclination of the objective lens (hereinafter referred to as an objective lens inclination adjusting mechanism) is provided in a portion for disposing the objective lens driving device on the mount of the optical system block, and drives the objective lens. The device is installed on the mount via an objective lens tilt adjusting mechanism. Therefore,
It was difficult to make the optical pickup thinner.
【０００５】この問題を解決したものとしては、図８に
示したように光学系ブロックの取付台に貫通部３２又は
凹部を形成し、この部分に対物レンズ駆動装置１０の対
物レンズ傾き調整機構３０を構成する可動板３１の底部
３１ｂ（底面側突出部）を臨ませたものがある（特開平
７ー１２１８８２号公報）。ここでは、対物レンズ駆動
装置１０が可動板３１上に設けられ、可動板の底部３１
ｂが、光学系ブロックの取付台に設けられた貫通部３２
に落とし込まれているため、光ピックアップ全体の厚み
を薄くすることができる。As a solution to this problem, as shown in FIG. 8, a penetrating portion 32 or a concave portion is formed in the mount of the optical system block, and the objective lens tilt adjusting mechanism 30 of the objective lens driving device 10 is formed in this portion. There is one in which the bottom portion 31b (bottom surface side projection portion) of the movable plate 31 constituting the above is faced (JP-A-7-121882). Here, the objective lens driving device 10 is provided on the movable plate 31, and the bottom portion 31 of the movable plate 31 is provided.
b is a penetrating portion 32 provided on the mount of the optical system block.
The optical pickup as a whole can be made thinner because it has been dropped into.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、対物レ
ンズの傾きを調整するときに、可動板３１を傾斜させる
ための支点となる球体受容穴３１ｄ（又は球状凸部）や
傾き調整ネジ３６と螺合する雌ネジ穴（又は貫通穴）
が、可動板の曲げ加工部である鍔部３１ａに設けられる
ため、前記球体受容穴３１ｄ等の対物レンズ傾き調整機
構に関する部分を高い位置精度で設けることが困難とな
り、又、組立上の制約が多く組立がしにくいという問題
点があった。However, when adjusting the inclination of the objective lens, the spherical plate receiving hole 31d (or the spherical convex portion) serving as a fulcrum for inclining the movable plate 31 and the inclination adjusting screw 36 are screwed together. Female screw hole (or through hole)
However, since it is provided in the flange portion 31a which is a bent portion of the movable plate, it becomes difficult to provide a portion related to the objective lens tilt adjusting mechanism such as the spherical body receiving hole 31d with high position accuracy, and there is a restriction on assembly. There was a problem that many were difficult to assemble.
【０００７】そこで、本発明は、対物レンズ傾き調整機
構に関する部分を高い位置精度で設けること及び対物レ
ンズ駆動装置の組立が容易で、光ピックアップ全体の厚
みを薄くすることが可能な光ピックアップ装置及びその
組立方法を提供することを目的とする。Therefore, the present invention provides an optical pickup device capable of providing a portion related to the objective lens tilt adjusting mechanism with high positional accuracy and easily assembling the objective lens driving device, and reducing the thickness of the entire optical pickup. It is an object to provide an assembling method thereof.
【０００８】[0008]
【課題を解決するための手段】請求項１記載の光ピック
アップ装置は、対物レンズを備えた対物レンズ駆動装置
と、該対物レンズを介して光ディスクに光を投射し、反
射光を検出する光学系ブロックからなり、該光学系ブロ
ックの取付台に設けられた貫通部に、前記対物レンズ駆
動装置の底面側を臨ませた光ピックアップ装置に於い
て、上記取付台に取り付けられた対物レンズ駆動装置の
傾き調整機構の支点が、該取付台の底部側に設けられて
いることを特徴とするものである。An optical pickup device according to claim 1 is an objective lens driving device having an objective lens, and an optical system for projecting light onto an optical disk through the objective lens and detecting reflected light. In an optical pickup device, which comprises a block and has a bottom surface side of the objective lens driving device exposed to a penetrating portion provided on the mounting base of the optical system block, the objective lens driving device mounted on the mounting base is The fulcrum of the tilt adjusting mechanism is provided on the bottom side of the mounting base.
【０００９】請求項２記載の光ピックアップ装置は、請
求項１記載の光ピックアップ装置に於いて、上記取付台
の対物レンズ駆動装置の傾き調整機構の支点が設けられ
ている部分の面が、上記取付台の底部面よりも上方側に
位置にことを特徴とするものである。According to a second aspect of the present invention, there is provided the optical pickup device according to the first aspect, wherein the surface of a portion of the mounting base where the fulcrum of the tilt adjusting mechanism of the objective lens driving device is provided is the above-mentioned. It is characterized in that it is located above the bottom surface of the mounting base.
【００１０】つまり、請求項２記載の光ピックアップ装
置に於いては、取付台を底部側から見たときに、取付台
の傾き調整機構の支点が設けられている部分の面が、取
付台の底部面よりも低くなっている。That is, in the optical pickup device according to the second aspect, when the mount is viewed from the bottom side, the surface of the portion where the fulcrum of the tilt adjustment mechanism of the mount is provided is the mount. It is lower than the bottom surface.
【００１１】請求項３記載の光ピックアップ装置は、請
求項１記載の光ピックアップ装置に於いて、上記対物レ
ンズ駆動装置の磁気回路部の一部が、上記取付台に設け
られた貫通部に収容されていることを特徴とするもので
ある。According to a third aspect of the present invention, there is provided the optical pickup device according to the first aspect, wherein a part of a magnetic circuit portion of the objective lens driving device is housed in a penetrating portion provided on the mounting base. It is characterized by being.
【００１２】請求項４記載の光ピックアップ装置は、請
求項１記載の光ピックアップ装置に於いて、上記対物レ
ンズ駆動装置を、底面側から付勢する付勢部材が、磁気
回路の底面側の部位を付勢することを特徴とするもので
ある。According to a fourth aspect of the present invention, there is provided the optical pickup device according to the first aspect, wherein the urging member for urging the objective lens driving device from the bottom side is located on the bottom side of the magnetic circuit. It is characterized by urging.
【００１３】請求項５記載の光ピックアップ装置の組立
方法は、対物レンズを備えた対物レンズ駆動装置の底面
側を、光ディスクに光を投射し、反射光を検出する光学
系ブロックの取付台に設けられた貫通部に臨ませて取り
付ける際に、上記対物レンズ駆動装置を、取付台の底部
側から取り付けることを特徴とするものである。According to a fifth aspect of the present invention, in the method of assembling the optical pickup device, the bottom surface side of the objective lens driving device provided with the objective lens is provided on the mount of the optical system block for projecting light on the optical disk and detecting reflected light. It is characterized in that the objective lens driving device is attached from the bottom side of the attachment base when it is attached so as to face the penetrating portion.
【００１４】[0014]
［本発明にかかる光ピックアップ装置の構成］図１は、
本発明にかかる光ピックアップ装置における対物レンズ
駆動装置の取付部周辺を示した断面図である。[Structure of Optical Pickup Device According to the Present Invention] FIG.
FIG. 3 is a cross-sectional view showing the periphery of a mounting portion of an objective lens driving device in the optical pickup device according to the present invention.
【００１５】光ピックアップ装置は、取付台２０上に設
けられた光学系ブロックと、取付台２０の貫通部３２に
取り付けられた対物レンズ駆動装置１０で構成される。
ここで、光学系ブロックは、取付台２０上に設けられた
光源や受光部等からなり、対物レンズ１１を介して、光
ディスクにレーザ光を投射し、その反射光を検出する部
分である。一方、対物レンズ駆動装置１０は、対物レン
ズ１１を光ディスクのトラッキング方向やフォーカス方
向に移動させる装置であり、その底面側は取付台２０に
設けられた貫通部３２に落とし込まれ、対物レンズ駆動
装置１０の底面側にある可動板３１や、永久磁石１３及
びヨーク１４からなる磁気回路の一部は、貫通部３２内
に収容されている。The optical pickup device is composed of an optical system block provided on the mounting base 20 and an objective lens driving device 10 mounted on the penetrating portion 32 of the mounting base 20.
Here, the optical system block includes a light source, a light receiving unit, and the like provided on the mount 20, and is a portion that projects a laser beam onto the optical disc through the objective lens 11 and detects the reflected light. On the other hand, the objective lens driving device 10 is a device for moving the objective lens 11 in the tracking direction and the focusing direction of the optical disc, and the bottom surface side thereof is dropped into the penetrating portion 32 provided in the mounting base 20 to drive the objective lens driving device. The movable plate 31 on the bottom surface side of 10 and a part of the magnetic circuit including the permanent magnet 13 and the yoke 14 are housed in the through portion 32.
【００１６】対物レンズ駆動装置１０の底面側にある可
動板３１は、対物レンズ傾き調整機構にかかる部材であ
り、支点部（球状凸部３７、受容穴３１ｄ）、高さ調整
部（高さ調整ネジ３６、雌ネジ部３１ｅ）の一部を構成
する部分が設けられている。ここで、高さ調整ネジ３６
を調整することにより、可動板３１の傾きを調整した場
合、この可動板３１上に設けられている対物レンズ駆動
装置１０の対物レンズ１１の傾きが変化する。A movable plate 31 on the bottom surface side of the objective lens driving device 10 is a member related to the objective lens tilt adjusting mechanism, and includes a fulcrum portion (spherical convex portion 37, receiving hole 31d) and a height adjusting portion (height adjustment). A part of the screw 36 and the female screw part 31e) is provided. Here, the height adjustment screw 36
When the tilt of the movable plate 31 is adjusted by adjusting, the tilt of the objective lens 11 of the objective lens driving device 10 provided on the movable plate 31 changes.
【００１７】尚、本発明にかかる光学ピックアップ装置
に於いては、傾き調整機構にかかる支点部が、取付台２
０の底部２２側にあるため、可動板３１の曲げ加工が施
されていない部分に傾き調整機構にかかる支点部や高さ
調整部を設けることができる。In the optical pickup device according to the present invention, the fulcrum portion of the tilt adjusting mechanism is the mount 2.
Since it is on the bottom 22 side of 0, a fulcrum portion and a height adjusting portion for the tilt adjusting mechanism can be provided in a portion of the movable plate 31 which is not bent.
【００１８】従って、可動板３１に傾き調整機構にかか
る支点部や高さ調整部を高い位置精度で設けることがで
きる。つまり、従来は、傾き調整機構にかかる支点部や
高さ調整部を可動板３１の曲げ加工部に設けていたた
め、高い位置精度でこれらの部分を設けることが困難で
あったが、本発明にかかる光学ピックアップ装置に於い
ては、これらの部分を可動板３１の曲げ加工が施されて
いない部分に設けているため、その位置精度が向上す
る。又、対物レンズ駆動装置の組立も容易になる。Therefore, it is possible to provide the movable plate 31 with a fulcrum portion and a height adjusting portion for the tilt adjusting mechanism with high positional accuracy. That is, conventionally, since the fulcrum part and the height adjusting part of the tilt adjusting mechanism were provided in the bending part of the movable plate 31, it was difficult to provide these parts with high positional accuracy. In such an optical pickup device, since these portions are provided in the portion of the movable plate 31 which is not bent, the positional accuracy is improved. Also, the assembly of the objective lens driving device becomes easy.
【００１９】図２は、光学ブロックの取付台２０を、そ
の底部２２側から見た斜視図であり、傾き調整機構にか
かる部分のみを示し、その他の部分は省略している。FIG. 2 is a perspective view of the mounting base 20 of the optical block as seen from the bottom 22 side thereof, showing only the portion related to the tilt adjusting mechanism and omitting the other portions.
【００２０】同図に於いては、可動板３１は、取付台２
０に底部２２側から取り付けられ、取付台２０の底部２
２側に設けられた球状凸部３７と可動板３１に設けられ
た受容穴３１ｄとが当接する。同図に於いては、球状凸
部を取付台側に、受容穴を可動板側に設けているが、球
状凸部を可動板側に、受容穴を取付台側に設けてもよ
い。In the figure, the movable plate 31 is attached to the mount 2.
0 from the bottom portion 22 side, and the bottom portion 2 of the mounting base 20.
The spherical convex portion 37 provided on the second side and the receiving hole 31d provided in the movable plate 31 come into contact with each other. In the figure, the spherical convex portion is provided on the mounting base side and the receiving hole is provided on the movable plate side, but the spherical convex portion may be provided on the movable plate side and the receiving hole is provided on the mounting base side.
【００２１】又、可動板３１は付勢部材３５により上方
に付勢されているため、球状凸部３７と受容穴３１ｄと
は、常に接触した状態が保たれる。一方、可動板３１の
雌ネジ部３１ｅについては、可動板２０を付勢部材３５
が付勢する位置（可動板２０に付勢部材３５が接する位
置）により、取付台に近づく力、又は、取付台から離れ
る力が働く。ここで、付勢部材３５が付勢する箇所は、
対物レンズ駆動装置の磁気回路（永久磁石及びヨークか
らなる磁気回路）の底面側であれば、対物レンズ駆動時
の動作がより安定する。Further, since the movable plate 31 is biased upward by the biasing member 35, the spherical convex portion 37 and the receiving hole 31d are always kept in contact with each other. On the other hand, regarding the female screw portion 31 e of the movable plate 31, the movable plate 20 is attached to the biasing member 35.
Depending on the position at which the urging force is applied (the position where the urging member 35 contacts the movable plate 20), a force that approaches the mounting base or a force that separates from the mounting base acts. Here, the position where the biasing member 35 biases is
If the magnetic circuit (magnetic circuit including a permanent magnet and a yoke) of the objective lens driving device is on the bottom side, the operation during driving the objective lens is more stable.
【００２２】図２に示した傾き調整機構は、高さ調整部
に取付台に近づく力が働く場合を示したものであり、高
さ調整ネジ３６は可動板３１に設けられた雌ネジ部３１
ｅを貫通し取付台にその先端が当接するため、高さ調整
ネジ３６の突き出る量を調整することにより、可動板３
１上に設けられている対物レンズ駆動装置の対物レンズ
の傾きが変化する。上記傾き調整機構にかかる高さ調整
ネジ３６及び雌ネジ部３１ｅは、２箇所に設けられてい
るので、これら２つの高さ調整ネジ３６を調整すること
により、トラッキング方向（図４に示したＹ軸方向）及
びジッター方向（図４に示したＸ軸方向）の傾きを調整
することができる。The tilt adjusting mechanism shown in FIG. 2 shows a case where a force is exerted on the height adjusting portion to approach the mounting base, and the height adjusting screw 36 has the female screw portion 31 provided on the movable plate 31.
Since the end of the movable plate 3 is abutted against the mounting base by penetrating e, the movable plate 3 is adjusted by adjusting the protruding amount of the height adjusting screw 36.
The tilt of the objective lens of the objective lens driving device provided on the first lens changes. Since the height adjusting screw 36 and the female screw portion 31e of the tilt adjusting mechanism are provided at two locations, the tracking direction (Y shown in FIG. 4) can be adjusted by adjusting these two height adjusting screws 36. The tilts in the axial direction) and the jitter direction (X-axis direction shown in FIG. 4) can be adjusted.
【００２３】一方、高さ調整部に取付台から離れる力が
働く場合には、可動板側の高さ調整部（図２で雌ネジ部
３１ｅを設けた部分）に貫通穴を、取付台側の高さ調整
部（図２で高さ調整ネジの先端が当接する部分）に雌ネ
ジ部を設け、可動板の貫通穴を通り取付台の雌ネジ部と
螺合する高さ調整ネジを調整することにより、可動板の
高さ調整部に取付台に近づく力を与え対物レンズ駆動装
置の対物レンズの傾きを調整することができる。On the other hand, when a force is applied to the height adjusting portion to separate it from the mounting base, a through hole is formed in the height adjusting portion on the movable plate side (the portion where the female screw portion 31e is provided in FIG. 2), and the mounting base side. A female screw is provided on the height adjusting part (the part where the tip of the height adjusting screw abuts in FIG. 2), and the height adjusting screw that passes through the through hole of the movable plate and engages with the female screw of the mounting base is adjusted. By doing so, it is possible to adjust the inclination of the objective lens of the objective lens driving device by giving a force approaching the mount to the height adjusting portion of the movable plate.
【００２４】尚、取付台側の支点部や高さ調整部の周辺
を、取付台のその他の底部よりも底部側から見て低くし
てもよく、この様にすることにより対物レンズ駆動装置
の底面側が取付台の底部側から突出するの避けること、
又は突出する量を減らすことができる。この場合、取付
台側の支点部や高さ調整部の周辺面は、取付台の厚み方
向断面の両端縁（底部側とその反対側）の内側に位置す
る。The periphery of the fulcrum portion and the height adjusting portion on the mounting base side may be lower than the other bottom portions of the mounting base when viewed from the bottom side, and by doing so, the objective lens driving device Avoid the bottom side protruding from the bottom side of the mount,
Alternatively, the amount of protrusion can be reduced. In this case, the peripheral surfaces of the fulcrum portion and the height adjusting portion on the mount base side are located inside both end edges (bottom side and the opposite side) of the cross section in the thickness direction of the mount base.
【００２５】図３は、支点部を拡大した断面図である。
かかる支点部は、球状凸部と受容穴３１ｄが接触し、摺
動する部分であり、可動板つまり対物レンズ駆動装置
は、支点３３を中心として傾きが変化する。ここで、支
点部を構成する凸部とこれと接する受容穴（又は凹部）
の形状は、特にこだわらないが、同図に示したような半
球状の球状凸部３７とテーパ部３１ｃを有する受容穴３
１ｄとで支点部を構成すれば、傾きの設定（位置決め）
の安定度が良好となる。FIG. 3 is an enlarged sectional view of the fulcrum portion.
The fulcrum portion is a portion where the spherical convex portion and the receiving hole 31d come into contact with each other and slide, and the tilt of the movable plate, that is, the objective lens driving device changes about the fulcrum 33. Here, the convex portion forming the fulcrum portion and the receiving hole (or concave portion) in contact with the convex portion
The shape of is not particularly limited, but the receiving hole 3 having the hemispherical spherical convex portion 37 and the tapered portion 31c as shown in FIG.
If the fulcrum part is configured with 1d, tilt setting (positioning)
The stability of is good.
【００２６】図４は、対物レンズ駆動装置全体を示した
斜視図である。同図に於いては、可動板３１はヨーク１
４も兼ねており、このヨーク１４と永久磁石１３とで磁
気回路を構成している。この磁気回路により駆動力が生
じるトラッキングコイル及びフォーカシングコイルを有
するレンズホルダー１２が導電性弾性部材１５によって
支持されている。FIG. 4 is a perspective view showing the entire objective lens driving device. In the figure, the movable plate 31 is the yoke 1
The yoke 14 and the permanent magnet 13 form a magnetic circuit. A lens holder 12 having a tracking coil and a focusing coil that generate a driving force by this magnetic circuit is supported by a conductive elastic member 15.
【００２７】又、光学系ブロックの光源から出たレーザ
光は、折り返しミラー４０により、レンズホルダー１２
が具備する対物レンズ１１の方向に向けられる。従っ
て、光学系ブロックの光源から出たレーザ光は、対物レ
ンズ１１を介して、光ディスクに投射され、その反射光
は、対物レンズ１１を介して、光学系ブロックの受光部
で検出される。The laser light emitted from the light source of the optical system block is reflected by the folding mirror 40 to the lens holder 12.
Is directed toward the objective lens 11 included in. Therefore, the laser light emitted from the light source of the optical system block is projected onto the optical disc through the objective lens 11, and the reflected light is detected by the light receiving unit of the optical system block through the objective lens 11.
【００２８】ここで、折り返しミラー４０は、対物レン
ズ１１の下方（図４のＺ軸方向の対物レンズ１１より取
付台側）に配置する必要がある。一方、対物レンズ１１
を具備した対物レンズ駆動装置における傾き調整機構に
かかる支点部は、取付台の対物レンズ１１と反対側の面
にある。従って、取付台に対物レンズ駆動装置を取り付
けるときに、例えば、取付台の底部側から取り付ける場
合には、対物レンズ駆動装置の対物レンズを取付台の貫
通部を介してその上面側（底部と反対の側）に配置しな
ければならない。一方、取付台の上面側から取り付ける
場合には、対物レンズ駆動装置の可動板に設けられた支
点部や高さ調整部を取付台の貫通部を介してその底部側
に配置しなければならない。Here, the folding mirror 40 needs to be arranged below the objective lens 11 (on the mount base side of the objective lens 11 in the Z-axis direction in FIG. 4). On the other hand, the objective lens 11
The fulcrum portion of the tilt adjusting mechanism in the objective lens driving device having the above is located on the surface of the mount opposite to the objective lens 11. Therefore, when the objective lens driving device is mounted on the mounting base, for example, when mounting from the bottom side of the mounting base, the objective lens of the objective lens driving device is placed on the upper surface side (opposite the bottom part) through the penetrating portion of the mounting base. Side). On the other hand, when mounting from the upper surface side of the mounting base, the fulcrum portion and the height adjusting portion provided on the movable plate of the objective lens driving device must be arranged on the bottom side via the penetrating portion of the mounting base.
【００２９】上記２通りの取付方法を考えた場合、取付
台の底部側から取り付ける方法の方が容易であり、更
に、図４に示したように対物レンズ駆動装置の傾き調整
機構にかかる支点部（同図に於いては受容穴３１が設け
られた部分）を対物レンズ１１よりもＸ軸の＋方向に配
置すれば、より容易に対物レンズ駆動装置の取付を行う
ことができる。When considering the above two mounting methods, the mounting method from the bottom side of the mounting base is easier, and further, as shown in FIG. 4, the fulcrum portion of the tilt adjusting mechanism of the objective lens driving device is used. By arranging (the portion where the receiving hole 31 is provided in the figure) in the + direction of the X axis rather than the objective lens 11, the objective lens driving device can be attached more easily.
【００３０】［本発明にかかる光ピックアップ装置の組
立方法］次に、対物レンズ駆動装置を取付台の底部側か
ら取り付ける方法について、図５を参照して説明する。
同図に於いては、レンズホルダー１２の対物レンズ１１
が搭載された部分を、取付台２０の貫通部３２に底部側
から進入させ、対物レンズ駆動装置１０を取付台２０に
取り付ける具体例を示している。[Method of Assembling Optical Pickup Device According to the Present Invention] Next, a method of mounting the objective lens driving device from the bottom side of the mounting base will be described with reference to FIG.
In the figure, the objective lens 11 of the lens holder 12 is shown.
A specific example is shown in which the portion on which is mounted is inserted into the penetrating portion 32 of the mounting base 20 from the bottom side to mount the objective lens driving device 10 on the mounting base 20.
【００３１】まず、レンズホルダー１２の対物レンズ１
１が搭載された部分を、取付台２０の貫通部３２に底部
２２側から進入させ、続いて可動板２０の受容穴３１ｄ
を取付台に設けられた球状凸部３７に当接させ、その
後、接触状態を保持したまま支点部（受容穴３１ｄと球
状凸部３７を当接させた部分）を中心に可動板３１の高
さ調整部側（雌ネジ部３１ｅが設けられている側）を、
取付台２０の底部２２側に回転させ、対物レンズ駆動装
置１０を所望の位置に仮配置する。次に、付勢部材をネ
ジ止めし、高さ調整ネジを取り付けることにより、対物
レンズ駆動装置の取付を完了する。First, the objective lens 1 of the lens holder 12
The portion on which 1 is mounted is inserted into the penetrating portion 32 of the mounting base 20 from the bottom portion 22 side, and subsequently, the receiving hole 31d of the movable plate 20.
Is brought into contact with the spherical convex portion 37 provided on the mounting base, and then the height of the movable plate 31 is raised around the fulcrum portion (the portion where the receiving hole 31d and the spherical convex portion 37 are brought into contact) while maintaining the contact state. The adjustment section side (the side where the female screw section 31e is provided)
The objective lens driving device 10 is temporarily placed at a desired position by rotating the mounting base 20 toward the bottom 22 side. Next, the biasing member is screwed and the height adjusting screw is attached to complete the attachment of the objective lens driving device.
【００３２】ここでは、傾き調整機構の支点部である可
動板３１の受容穴３１ｄが対物レンズ１１よりもＸ軸の
＋方向にあるため、レンズホルダー１２の対物レンズ１
１が搭載された部分を、先に取付台２０の貫通部３２に
底部２２側から進入させることや、支点部を中心に可動
板３１を回転させることができる。又、容易に対物レン
ズ１１を、折り返しミラー４０の上方に配置することが
できる。Since the receiving hole 31d of the movable plate 31, which is the fulcrum of the tilt adjusting mechanism, is located in the + direction of the X axis relative to the objective lens 11, the objective lens 1 of the lens holder 12 is used.
The portion on which 1 is mounted can be inserted into the penetrating portion 32 of the mounting base 20 first from the bottom portion 22 side, or the movable plate 31 can be rotated around the fulcrum portion. Further, the objective lens 11 can be easily arranged above the folding mirror 40.
【００３３】図５に示したように、レンズホルダー１２
の対物レンズ１１が搭載された部分を、先に取付台２０
の貫通部３２に底部２２側から進入させ、その後、支点
部を中心に可動板３１を回転させることにより、図６の
斜視図に示した取付前の対物レンズ駆動装置と取付台
を、図７の斜視図に示したように組み立てることがで
き、又、対物レンズ１１を、折り返しミラー４０の上方
に配置することもできる。As shown in FIG. 5, the lens holder 12
The part on which the objective lens 11 of FIG.
7 from the bottom portion 22 side, and thereafter, the movable plate 31 is rotated around the fulcrum portion, so that the objective lens driving device and the mounting base before mounting shown in the perspective view of FIG. The objective lens 11 can be arranged above the folding mirror 40, as shown in FIG.
【００３４】[0034]
【発明の効果】以上、説明したように本発明にかかるピ
ックアップ装置、対物レンズの傾きを調整するときに、
可動板３１を傾斜させるための支点部や高さ調整部を、
可動板の曲げ加工部である鍔部に設ける必要がない（可
動板に鍔部を設ける曲げ加工を施す必要もない）ため、
対物レンズ傾き調整機構に関する部分を高い位置精度で
設けることが可能となり、又、対物レンズ駆動装置の組
立も容易になる。又、光ピックアップ全体の厚みも薄く
することができる。As described above, when the tilt of the pickup device and the objective lens according to the present invention is adjusted,
A fulcrum part and a height adjusting part for inclining the movable plate 31,
Since it is not necessary to provide it on the flange part that is the bending part of the movable plate (it is not necessary to perform the bending process to provide the flange part on the movable plate),
It is possible to provide a portion related to the objective lens tilt adjusting mechanism with high positional accuracy, and also the objective lens driving device can be easily assembled. Also, the thickness of the entire optical pickup can be reduced.
【図１】本発明にかかるピックアップ装置の対物レンズ
傾き調整機構の周辺を示した断面図である。FIG. 1 is a cross-sectional view showing the periphery of an objective lens tilt adjusting mechanism of a pickup device according to the present invention.
【図２】対物レンズ傾き調整機構にかかる可動板と取付
台との関係を示した斜視図である。FIG. 2 is a perspective view showing a relationship between a movable plate and a mounting base of an objective lens tilt adjusting mechanism.
【図３】対物レンズ傾き調整機構にかかる支点部を拡大
した断面図である。FIG. 3 is an enlarged sectional view of a fulcrum portion of an objective lens tilt adjusting mechanism.
【図４】対物レンズ駆動装置を示した斜視図である。FIG. 4 is a perspective view showing an objective lens driving device.
【図５】取付台に対物レンズ駆動装置を取り付ける工程
を示した断面図である。FIG. 5 is a cross-sectional view showing a step of mounting the objective lens driving device on the mounting base.
【図６】対物レンズ駆動装置と取付台との関係を示した
斜視図（取付前）である。FIG. 6 is a perspective view (before attachment) showing the relationship between the objective lens driving device and the attachment base.
【図７】対物レンズ駆動装置と取付台との関係を示した
斜視図（取付後）である。FIG. 7 is a perspective view (after attachment) showing the relationship between the objective lens driving device and the attachment base.
【図８】従来のピックアップ装置の対物レンズ傾き調整
機構の周辺を示した断面図である。FIG. 8 is a sectional view showing the periphery of an objective lens tilt adjusting mechanism of a conventional pickup device.
Claims (5)
と、該対物レンズを介して光ディスクに光を投射し、反
射光を検出する光学系ブロックからなり、該光学系ブロ
ックの取付台に設けられた貫通部に、前記対物レンズ駆
動装置の底面側を臨ませた光ピックアップ装置に於い
て、上記取付台に取り付けられた対物レンズ駆動装置の
傾き調整機構の支点が、該取付台の底部側に設けられて
いることを特徴とする光ピックアップ装置。1. An objective lens driving device having an objective lens, and an optical system block for projecting light onto an optical disc through the objective lens and detecting reflected light, the optical system block being provided on a mount of the optical system block. In the optical pickup device in which the bottom surface side of the objective lens driving device is exposed to the through portion, the fulcrum of the tilt adjusting mechanism of the objective lens driving device mounted on the mounting base is located on the bottom side of the mounting base. An optical pickup device characterized by being provided.
いて、上記取付台の対物レンズ駆動装置の傾き調整機構
の支点が設けられている部分の面が、上記取付台の底部
面よりも上方側に位置にことを特徴とする光ピックアッ
プ装置。2. The optical pickup device according to claim 1, wherein a surface of a portion of the mounting base where the fulcrum of the tilt adjusting mechanism of the objective lens driving device is provided is higher than a bottom surface of the mounting base. An optical pickup device characterized by being located on the side.
いて、上記対物レンズ駆動装置の磁気回路部の一部が、
上記取付台に設けられた貫通部に収容されていることを
特徴とする光ピックアップ装置。3. The optical pickup device according to claim 1, wherein a part of a magnetic circuit portion of the objective lens driving device is
An optical pickup device, wherein the optical pickup device is housed in a penetrating portion provided on the mount.
いて、上記対物レンズ駆動装置を、底面側から付勢する
付勢部材が、磁気回路の底面側の部位を付勢することを
特徴とする光ピックアップ装置。4. The optical pickup device according to claim 1, wherein a biasing member that biases the objective lens driving device from the bottom side biases a site on the bottom side of the magnetic circuit. Optical pickup device.
の底面側を、光ディスクに光を投射し、反射光を検出す
る光学系ブロックの取付台に設けられた貫通部に臨ませ
て取り付ける際に、上記対物レンズ駆動装置を、取付台
の底部側から取り付けることを特徴とする光ピックアッ
プ装置の組立方法。5. When mounting the objective lens driving device provided with an objective lens so as to face the bottom surface side to a penetrating portion provided in a mount of an optical system block that projects light onto an optical disc and detects reflected light. A method for assembling an optical pickup device, characterized in that the objective lens driving device is mounted from the bottom side of a mounting base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07030996A JP3247604B2 (en) | 1996-03-26 | 1996-03-26 | Optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07030996A JP3247604B2 (en) | 1996-03-26 | 1996-03-26 | Optical pickup device |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11252177A Division JP2000076661A (en) | 1999-09-06 | 1999-09-06 | Optical pickup device |
| JP2001235846A Division JP2002092911A (en) | 2001-08-03 | 2001-08-03 | Method for assembling optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09265647A true JPH09265647A (en) | 1997-10-07 |
| JP3247604B2 JP3247604B2 (en) | 2002-01-21 |
Family
ID=13427740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07030996A Expired - Fee Related JP3247604B2 (en) | 1996-03-26 | 1996-03-26 | Optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3247604B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011170906A (en) * | 2010-02-16 | 2011-09-01 | Sharp Corp | Optical pickup device and assembling method of the same |
-
1996
- 1996-03-26 JP JP07030996A patent/JP3247604B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011170906A (en) * | 2010-02-16 | 2011-09-01 | Sharp Corp | Optical pickup device and assembling method of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3247604B2 (en) | 2002-01-21 |
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