JPS6233657B2 - - Google Patents
Info
- Publication number
- JPS6233657B2 JPS6233657B2 JP20699381A JP20699381A JPS6233657B2 JP S6233657 B2 JPS6233657 B2 JP S6233657B2 JP 20699381 A JP20699381 A JP 20699381A JP 20699381 A JP20699381 A JP 20699381A JP S6233657 B2 JPS6233657 B2 JP S6233657B2
- Authority
- JP
- Japan
- Prior art keywords
- tracking
- focus
- permanent magnet
- frame
- moving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000013585 weight reducing agent Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 description 13
- 238000000926 separation method Methods 0.000 description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/093—Electromechanical actuators for lens positioning for focusing and tracking
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0925—Electromechanical actuators for lens positioning
- G11B7/0932—Details of sprung supports
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】
この発明は、光ピツクアツプ装置の対物レンズ
上下左右移動装置に係り、特にトラツキング駆動
部とフオーカス駆動部をデイスクに対して平行か
つ同一線上に配置するとともにフオーカス駆動用
永久磁石として１対の角棒状のものを用い、かつ
対物レンズをフオーカス駆動部の中心位置よりデ
イスク半径内周方向にずらして配置した光ピツク
アツプ装置の対物レンズ上下左右移動装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for moving an objective lens vertically and horizontally for an optical pickup device, and in particular, a tracking drive unit and a focus drive unit are disposed parallel to and on the same line with respect to a disk, and a permanent magnet for focus drive is arranged. The present invention relates to a vertical and horizontal movement device for an objective lens of an optical pickup device, in which a pair of square rod-shaped objects are used, and the objective lens is shifted from the center position of a focus drive unit in the inner peripheral direction of the disk radius.
従来の光ピツクアツプ装置におけるフオーカス
およびトラツキング制御の一例を第１図および第
２図に示すが、これによるとフオーカス（Ｚ軸方
向）制御はボイスコイル電磁駆動、またトラツキ
ング（Ｘ軸方向）制御はリニアモータ電磁駆動に
より行つており、その駆動対象はいずれも対物レ
ンズ１である。 An example of focus and tracking control in a conventional optical pickup device is shown in Figures 1 and 2. According to these, focus (Z-axis direction) control is performed by voice coil electromagnetic drive, and tracking (X-axis direction) control is performed by linear drive. This is done by electromagnetic driving of a motor, and the object to be driven is the objective lens 1 in both cases.
つまりレンズ筒２内に取り付けられたトラツキ
ング用平行板バネ３上に対物レンズ１が固定され
た円筒状永久磁石４を装着するとともにレンズ筒
２中間部からボイスコイル５を突設周設し、かつ
円筒状永久磁石４、ボイスコイル５をそれぞれ収
納筒６の上部に内設されたリニアモータ電磁駆動
部７内、収納筒６の中間部に内設されたボイスコ
イル電磁駆動部８内に配置して、中央部に円孔を
有するフオーカス用平行板バネ９を用いて収納筒
６内部にレンズ筒２を保持し、ボイスコイル５ま
たリニアモータ電磁駆動部８内のコイル１０に流
れる電流の方向および大きさにより対物レンズ１
をＺ軸方向またはＸ軸方向に移動させるものであ
る。このようにデイスクに対してトラツキング駆
動部とフオーカス駆動部が垂直２段に配置されて
いる。 That is, a cylindrical permanent magnet 4 to which the objective lens 1 is fixed is mounted on a parallel plate spring 3 for tracking mounted inside the lens barrel 2, and a voice coil 5 is provided around the middle of the lens barrel 2, protruding from the middle part of the lens barrel 2. A cylindrical permanent magnet 4 and a voice coil 5 are arranged in a linear motor electromagnetic drive unit 7 installed in the upper part of the storage cylinder 6 and in a voice coil electromagnetic drive unit 8 installed in the middle part of the storage cylinder 6, respectively. The lens barrel 2 is held inside the storage barrel 6 using a focus parallel plate spring 9 having a circular hole in the center, and the direction of the current flowing in the voice coil 5 and the coil 10 in the linear motor electromagnetic drive unit 8 is determined. Objective lens 1 depending on the size
is moved in the Z-axis direction or the X-axis direction. In this way, the tracking drive section and the focus drive section are arranged in two stages perpendicular to the disk.
この従来技術において、トラツキング用平行板
バネ３はトラツキング動作範囲を大きくとるため
にはバネ定数の小さいものが望ましく、また自立
するためにはある程度バネ定数の大きいものが必
要となる。更に温度変化の影響を受けないものと
なると、金属製のものが好ましい。以上を総合に
勘案して概して金属製の長い板バネを用いてい
る。したがつて光ピツクアツプ装置のＺ軸方向の
大きさH1は大となり、そのため光ピツクアツプ
装置が大型となり重量も重いという問題点があつ
た。 In this prior art, it is desirable that the tracking parallel plate spring 3 has a small spring constant in order to widen the range of tracking operation, and it is also necessary to have a somewhat large spring constant in order to be able to stand on its own. Furthermore, metal is preferable because it is not affected by temperature changes. Taking all of the above into consideration, long metal leaf springs are generally used. Accordingly, the size H1 of the optical pickup device in the Z-axis direction becomes large, which poses a problem in that the optical pickup device becomes large and heavy.
またデイスク回転駆動用モータのハウジングと
ピツクアツプ本体が同一側にある場合、デイスク
内周をピツクアツプするとなるとデイスク半径方
向について光軸とピツクアツプ本体の外面との離
隔距離R1は、できるだけ小さいことが好ましい
が、ボイスコイル５とボイスコイル電磁駆動部８
とから構成されるフオーカス駆動部と対物レンズ
１が同心円状に配置されているため、ある程度以
上小さくすることができないという問題点があつ
た。 In addition, when the housing of the disk rotation drive motor and the pickup body are on the same side, when picking up the inner circumference of the disk, it is preferable that the separation distance R 1 between the optical axis and the outer surface of the pickup body in the disk radial direction be as small as possible. , voice coil 5 and voice coil electromagnetic drive section 8
Since the focus drive section and the objective lens 1 are arranged concentrically, there is a problem in that the size cannot be reduced beyond a certain level.
この発明は、このような従来技術の問題点に着
目してなされたもので、トラツキング駆動部とフ
オーカス駆動部をデイスクに対して平行かつ同一
線上に配置するとともにフオーカス駆動用永久磁
石として１対の角棒状のものを用い、かつ対物レ
ンズをフオーカス駆動部の中心位置よりデイスク
半径内周方向にずらして配置することによつて上
記問題点を解決することを目的としている。 The present invention was made by focusing on the problems of the prior art, and includes a tracking drive section and a focus drive section arranged parallel to and on the same line with respect to the disk, and a pair of permanent magnets used as focus drive permanent magnets. The object of the present invention is to solve the above-mentioned problems by using a rectangular bar-shaped object and arranging the objective lens offset from the center position of the focus drive section in the direction of the inner radius of the disk.
以下、この発明を図面に基づいて説明する。 The present invention will be explained below based on the drawings.
第３図は、この発明の一実施例を示す分解斜視
図である。 FIG. 3 is an exploded perspective view showing an embodiment of the present invention.
まず構成を説明すると、１１はフオーカス駆動
用永久磁石で、１対の角棒形状である。フオーカ
ス駆動用永久磁石１１は、断面長方形の永久磁石
片１１Ａと、永久磁石片１１Ａの上面に固定され
る断面Ｌ字状の磁性片１１Ｂと、永久磁石片１１
Ａの下面に固定される断面」字状の磁性片１１Ｃ
とから構成され、磁性片１１Ｂ，１１Ｃ間には空
隙部１１Ｄが形成されている。フオーカス駆動用
永久磁石１１は外枠１２に固定され、その長手方
向がトラツキング移動方向（Ｘ軸方向）と平行で
ある。フオーカス駆動用永久磁石として１対の角
棒形状のものを用いることにより、円筒形状のも
のよりも光軸とピツクアツプ本体の外面との離隔
距離R2は小さくできる。１３は上下左右移動部
で、立方体である。上下左右移動部１３の４側壁
面にはフオーカン駆動用永久磁石１１の空隙部１
１Ｄに配置されるフオーカス制御用角形コイル１
４が突設周設され、左下部分には対物レンズ１が
装着され対物レンズ１と対角線上の右上部分には
バランスウエイト１３Ａが取り付けられている。
また上下左右移動部１３の右下および左上部分に
は重量軽減用透孔１３Ｂが穿設され、中央部分か
らは下向に下部支持片１３Ｃが穿設されている。
このように対物レンズ１は、第４図に示す如くフ
オーカス駆動用永久磁石１１とフオーカス制御用
角形コイル１４とからなるフオーカス駆動部の中
心位置よりデイスクＤ半径内周方向にずれて配置
されている。したがつて光軸とピツクアツプ本体
の外面との離隔距離R2は従来技術に比べて小く
できる。１５はトラツキング移動枠で、その寸法
はフオーカス制御用角形コイル１４より大きい。
そしてトラツキング移動方向（Ｘ軸方向）と平行
する両側面には長方形孔１５Ａが穿設されてい
る。フオーカス駆動用永久磁石１１の一部は長方
形孔１５Ａを挿通しフオーカス駆動用永久磁石１
１の空隙部１１Ｄはトラツキング移動枠１５の内
側に配置されている。１６はトラツキング用平行
板バネで、トラツキング移動枠１５のトラツキン
グ移動方向（Ｘ軸方向）と直交する両側面に装着
されている。１７はトラツキング制御用角形コイ
ルで、右側のトラツキング平行板バネ１６の右側
面中央部に取り付けられている。左側のトラツキ
ング平行板バネ１６の左側面は外枠１２に接触し
ている。１８はトラツキング駆動用永久磁石で、
２個の永久磁石片１８Ａ，１８Ｂと、２個の永久
磁石片１８Ａ，１８ＢのＳ極間に挾着される平面
Ｔ字状の磁性片１８Ｃと２個の永久磁石片のＮ極
側に固着される平面Ｌ字形および平面」字状の磁
性片１８Ｄおよび１８Ｅとから構成される。そし
て磁性片８Ｃと磁性片１８Ｄとの間および磁性片
１８Ｃと磁性片１８Ｅとの間に空隙部１８Ｆが形
成される。トラツキング駆動用永久磁石１８は外
枠１２に固定され、空隙部１８Ｆにトラツキング
制御用角形コイル１７が挿入される。このように
トラツキング駆動用永久磁石１８とトラツキング
制御用角形コイル１７とからなるトラツキング駆
動部はデイスクＤに平行でかつフオーカス駆動部
と同一線に配置される。したがつて光ピツクアツ
プ装置のＺ軸方向の大きさH2は小さくなり、光
ピツクアツプ装置の薄形化が図れる。１９はフオ
ーカス用平行板バネで外枠１２とトラツキング移
動枠１５の上面および下面間に挿入され、トラツ
キング移動枠１５および上下左右移動部１３を弾
性支持する。 First, the structure will be explained. Reference numeral 11 denotes a focus drive permanent magnet, which has the shape of a pair of square rods. The focus drive permanent magnet 11 includes a permanent magnet piece 11A having a rectangular cross section, a magnetic piece 11B having an L-shaped cross section fixed to the upper surface of the permanent magnet piece 11A, and a permanent magnet piece 11
Magnetic piece 11C with a ”-shaped cross section fixed to the lower surface of A
A gap 11D is formed between the magnetic pieces 11B and 11C. The focus drive permanent magnet 11 is fixed to the outer frame 12, and its longitudinal direction is parallel to the tracking movement direction (X-axis direction). By using a pair of rectangular bar-shaped permanent magnets as the focus drive permanent magnets, the separation distance R 2 between the optical axis and the outer surface of the pickup body can be made smaller than when using a cylindrical permanent magnet. 13 is a vertically and horizontally moving section, which is a cube. On the four side wall surfaces of the vertical and horizontal moving section 13, there is a gap 1 of a permanent magnet 11 for focusing focus drive.
Square coil 1 for focus control placed in 1D
An objective lens 1 is attached to the lower left portion, and a balance weight 13A is attached to the upper right portion diagonally to the objective lens 1.
Weight reduction through holes 13B are formed in the lower right and upper left portions of the vertical and horizontal moving portion 13, and a lower support piece 13C is formed downward from the center portion.
As shown in FIG. 4, the objective lens 1 is disposed offset in the radial inner circumferential direction of the disk D from the center position of the focus drive section consisting of the focus drive permanent magnet 11 and the focus control rectangular coil 14. . Therefore, the separation distance R2 between the optical axis and the outer surface of the pickup body can be made smaller than in the prior art. Reference numeral 15 denotes a tracking moving frame, the size of which is larger than the focus control rectangular coil 14.
Rectangular holes 15A are formed on both side surfaces parallel to the tracking movement direction (X-axis direction). A part of the focus drive permanent magnet 11 is inserted through the rectangular hole 15A.
The first gap 11D is arranged inside the tracking movement frame 15. Parallel plate springs 16 for tracking are attached to both side surfaces of the tracking movement frame 15 perpendicular to the tracking movement direction (X-axis direction). Reference numeral 17 denotes a rectangular coil for tracking control, which is attached to the center of the right side of the right tracking parallel plate spring 16. The left side surface of the left tracking parallel plate spring 16 is in contact with the outer frame 12. 18 is a permanent magnet for tracking drive,
Two permanent magnet pieces 18A, 18B, a flat T-shaped magnetic piece 18C sandwiched between the S poles of the two permanent magnet pieces 18A, 18B, and fixed to the N pole side of the two permanent magnet pieces. The magnetic pieces 18D and 18E each have an L-shaped plane and a '-shaped plane. A gap 18F is formed between the magnetic piece 8C and the magnetic piece 18D and between the magnetic piece 18C and the magnetic piece 18E. The tracking drive permanent magnet 18 is fixed to the outer frame 12, and the tracking control rectangular coil 17 is inserted into the gap 18F. In this way, the tracking drive section consisting of the tracking drive permanent magnet 18 and the tracking control rectangular coil 17 is arranged parallel to the disk D and on the same line as the focus drive section. Therefore, the size H2 of the optical pickup device in the Z-axis direction is reduced, and the optical pickup device can be made thinner. A focus parallel plate spring 19 is inserted between the upper and lower surfaces of the outer frame 12 and the tracking movement frame 15, and elastically supports the tracking movement frame 15 and the vertical and horizontal movement parts 13.
なおフオーカス制御用角形コイル１４の長手方
向の大きさは、トラツキング移動（Ｘ軸方向）の
際フオーカス制御用角形コイル１４がフオーカス
駆動用永久磁石１１に接触しないように定める。
またトラツキング制御用角形コイル１７の高さ
は、フオーカス移動（Ｚ軸方向）の際トラツキン
グ制御用角形コイル１７がトラツキング駆動用永
久磁石１８の磁性片１８Ｃに接触しないように定
める。さらにはトラツキング移動枠１５の長方形
孔１５Ａの大きさは、トラツキング移動（Ｘ軸方
向）の際トラツキング移動枠１５がフオーカス駆
動用永久磁石１１に接触しないように定める。 The size of the focus control rectangular coil 14 in the longitudinal direction is determined so that the focus control rectangular coil 14 does not come into contact with the focus drive permanent magnet 11 during tracking movement (X-axis direction).
The height of the tracking control rectangular coil 17 is determined so that the tracking control rectangular coil 17 does not come into contact with the magnetic piece 18C of the tracking drive permanent magnet 18 during focus movement (in the Z-axis direction). Furthermore, the size of the rectangular hole 15A of the tracking movement frame 15 is determined so that the tracking movement frame 15 does not come into contact with the focus drive permanent magnet 11 during tracking movement (in the X-axis direction).
次に作用を説明する。フオーカス誤差信号また
はトラツキング誤差信号がゼロであるときは、フ
オーカス制御用角形コイル１４またはトラツキン
グ制御用角形コイル１７には電流が流れず対物レ
ンズ１は所定の位置に静止してい和る。いまフオ
ーカス誤差信号があるとフオーカス制御用角形コ
イル１４に電流が流れる。この電流の方向とフオ
ーカス駆動用永久磁石１１による磁束の方向は直
交しているから、フレミングの左手の法則に基づ
いてフオーカス制御用角形コイル１４は上下方向
（Ｚ軸方向）に力を受ける。そしてフオーカス制
御用角形コイル１４は上下左右移動部１３と一体
となり、フオーカス用平行板バネ１９によつて弾
性支持されているから、上下方向（Ｚ軸方向）に
移動する。したがつてフオーカス制御用角形コイ
ル１４と上下左右移動部１３を介して一体となつ
ている対物レンズ１も上下方向（Ｚ軸方向）に移
動する。なお移動方向および移動量はフオーカス
制御用角形コイル１４に流れる電流の方向および
大きさによつて定まる。次にトラツキング誤差信
号があるとトラツキング制御用角形コイル１７に
電流が流れる。この電流の方向とトラツキング駆
動用永久磁石１８による磁束の方向は直交してい
るから、フレミングの左手の法則に基づいてトラ
ツキング制御用角形コイル１７は左右方向（Ｘ軸
方向）に力を受ける。そしてトラツキング制御用
角形コイル１７はトラツキング用平行板バネ１
６、トラツキング移動枠１５と一体となり、トラ
ツキング移動枠１５に取り付けられているトラツ
キング用平行板バネ１６によつて左右方向（Ｘ軸
方向）に関し弾性支持されているから、左右方向
（Ｘ軸方向）に移動する。したがつてトラツキン
グ制御用角形コイル１７とトラツキング用平行板
バネ１６、トラツキング移動枠１５、フオーカス
用平行板バネ１９および上下左右移動部１３を介
して一体となつてなる対物レンズ１も左右方向
（Ｘ軸方向）に移動する。移動方向および移動量
はトラツキング制御用角形コイル１７に流れる電
流の方向および大きさによつて定まる。なおフオ
ーカス誤差信号およびトラツキング誤差信号は、
第４図に示すように半導体レーザ２０のレーザ光
をコリメータレンズ２１、偏光ビームスプリツタ
２２、1/4波長板２３、90゜偏光ミラー２４、対
物レンズ１に導き、デイスクＤからの反射光を逆
の順序で偏光ビームスプリツタ２２まで戻し、90
゜偏向させ、図示しない遮光板、収束レンズを経
て４分割センサに導いて得ている。 Next, the effect will be explained. When the focus error signal or the tracking error signal is zero, no current flows through the focus control rectangular coil 14 or the tracking control rectangular coil 17, and the objective lens 1 remains stationary at a predetermined position. If there is a focus error signal now, a current flows through the focus control rectangular coil 14. Since the direction of this current and the direction of the magnetic flux from the focus drive permanent magnet 11 are perpendicular to each other, the focus control rectangular coil 14 receives a force in the vertical direction (Z-axis direction) based on Fleming's left hand rule. Since the focus control rectangular coil 14 is integrated with the vertical and horizontal moving section 13 and is elastically supported by the focus parallel plate spring 19, it moves in the vertical direction (Z-axis direction). Accordingly, the objective lens 1, which is integrated with the focus control rectangular coil 14 and the vertical and horizontal moving section 13, also moves in the vertical direction (Z-axis direction). Note that the direction and amount of movement are determined by the direction and magnitude of the current flowing through the focus control rectangular coil 14. Next, when there is a tracking error signal, a current flows through the tracking control rectangular coil 17. Since the direction of this current and the direction of the magnetic flux from the tracking drive permanent magnet 18 are perpendicular to each other, the tracking control rectangular coil 17 receives a force in the left-right direction (X-axis direction) based on Fleming's left-hand rule. The square coil 17 for tracking control is the parallel plate spring 1 for tracking.
6. It is integrated with the tracking moving frame 15 and is elastically supported in the left-right direction (X-axis direction) by the tracking parallel plate spring 16 attached to the tracking moving frame 15. Move to. Therefore, the objective lens 1, which is integrated through the tracking control rectangular coil 17, the tracking parallel plate spring 16, the tracking movement frame 15, the focus parallel plate spring 19, and the vertical and horizontal movement section 13, also moves in the left-right direction (X axial direction). The direction and amount of movement are determined by the direction and magnitude of the current flowing through the tracking control rectangular coil 17. Note that the focus error signal and tracking error signal are
As shown in FIG. 4, the laser beam from the semiconductor laser 20 is guided to a collimator lens 21, a polarizing beam splitter 22, a quarter-wave plate 23, a 90° polarizing mirror 24, and an objective lens 1, and the reflected light from the disk D is Return to the polarizing beam splitter 22 in the reverse order, 90
It is obtained by deflecting the light by .degree. and guiding it to a 4-split sensor via a light-shielding plate and a converging lens (not shown).
以上説明してきたように、この発明は、トラツ
キング駆動部とフオーカス駆動部をデイスクに対
して平行でかつ同一線上に配置するとともにフオ
ーカス駆動用永久磁石として１対の角棒状のもの
を用い、かつ対物レンズをフオーカス駆動部の中
心位置よりデイスク半径内周方向にずらして配置
することによつて光ピツクアツプ装置の薄形化を
図ることができ、光軸と光ピツクアツプ装置の外
面との離隔距離を小さくすることができるという
効果が得られる。 As explained above, the present invention arranges the tracking drive section and the focus drive section parallel to the disk and on the same line, uses a pair of rectangular rod-shaped permanent magnets as focus drive permanent magnets, and By arranging the lens offset from the center position of the focus drive unit toward the inner radius of the disk, the optical pickup device can be made thinner, and the separation distance between the optical axis and the outer surface of the optical pickup device can be reduced. The effect of being able to do this is obtained.
第１図は従来技術の断面図、第２図は従来技術
のトラツキング駆動部の分解斜視図、第３図はこ
の発明の一実施例を示す分解斜視図、第４図は光
学系を含めた第３図のA′―Ａ略断面図である。
１……対物レンズ、２……レンズ筒、３……ト
ラツキング用平行板バネ、４……円筒状永久磁
石、５……ボイスコイル、６……収納筒、７……
リニアモータ電磁駆動部、８……ボイスコイル電
磁駆動部、９……フオーカス用平行板バネ、１０
……コイル、１１……フオーカス駆動用永久磁
石、１２……外枠、１３……上下左右移動部、１
４……フオーカス制御用角形コイル、１５……ト
ラツキング移動枠、１６……トラツキング用平行
板バネ、１７……トラツキング制御用角形コイ
ル、１８……トラツキング駆動用永久磁石、１９
……フオーカス用平行板バネ、２０……半導体レ
ーザ、２１……コリメータレンズ、２２……偏光
ビームスプリツタ、２３……1/4波長板、２４…
…90゜偏向ミラー。
Fig. 1 is a sectional view of the prior art, Fig. 2 is an exploded perspective view of a tracking drive unit of the prior art, Fig. 3 is an exploded perspective view showing an embodiment of the present invention, and Fig. 4 is an exploded perspective view of a tracking drive unit of the prior art. It is a schematic sectional view taken along line A'-A in FIG. 3. 1... Objective lens, 2... Lens barrel, 3... Parallel leaf spring for tracking, 4... Cylindrical permanent magnet, 5... Voice coil, 6... Storage tube, 7...
Linear motor electromagnetic drive section, 8...Voice coil electromagnetic drive section, 9...Parallel plate spring for focus, 10
... Coil, 11 ... Permanent magnet for focus drive, 12 ... Outer frame, 13 ... Up/down/left/right moving part, 1
4... Square coil for focus control, 15... Tracking moving frame, 16... Parallel plate spring for tracking, 17... Square coil for tracking control, 18... Permanent magnet for tracking drive, 19
... Parallel plate spring for focus, 20 ... Semiconductor laser, 21 ... Collimator lens, 22 ... Polarizing beam splitter, 23 ... 1/4 wavelength plate, 24 ...
...90° deflection mirror.
Claims (1)
と平行する両側面に穿設された長方形孔を挿通し
該トラツキング移動枠の内側に一部が突出しかつ
長手方向がトラツキング移動方向と平行で外枠に
固定された永久磁石片と磁性片とからなる１対の
角棒状のフオーカス駆動用永久磁石と、該フオー
カス駆動用永久磁石の空隙部に配置されるフオー
カス制御用角形コイルが突設周設され左下部分に
対物レンズが装着され該対物レンズと対角線上の
右上部分にバランスウエイトが取り付けられると
ともに右下部分および左上部分に重量軽減用透孔
が穿設され、かつ中央部分から下向に下部支持片
が突設されている上下左右移動部と、該トラツキ
ング移動枠のトラツキング移動方向と直交する両
側面に装着されたトラツキング用平行板バネと、
右側の該トラツキング用平行板バネの右側面中央
部に固定されたトラツキング制御用角形コイル
と、該トラツキング制御用角形コイルの中空部に
一部が挿入されかつ外枠に固定された永久磁石片
と磁性片とからなるトラツキング駆動用永久磁石
と外枠と該トラツキング移動枠の上面および下面
間に挿入されて該トラツキング移動枠および該上
下左右移動部を弾性支持するフオーカス用平行板
バネとからなる光ピツクアツプ装置の対物レンズ
上下左右移動装置。1 A part of the tracking moving frame is inserted into a rectangular hole drilled on both sides of the tracking moving frame parallel to the tracking moving direction, and is fixed to the outer frame with the longitudinal direction parallel to the tracking moving direction. A pair of rectangular bar-shaped focus drive permanent magnets made of a permanent magnet piece and a magnetic piece, and a focus control square coil placed in the gap between the focus drive permanent magnets are protruded around the circumference, and an objective is located in the lower left part. A lens is attached, and a balance weight is attached to the upper right part on the diagonal line with the objective lens, weight reduction through holes are bored in the lower right part and upper left part, and a lower support piece is provided downward from the center part. a vertical and horizontal moving part, and a parallel plate spring for tracking mounted on both sides of the tracking movement frame perpendicular to the tracking movement direction;
A rectangular coil for tracking control fixed to the center of the right side of the parallel plate spring for tracking on the right side, and a permanent magnet piece partially inserted into the hollow part of the rectangular coil for tracking control and fixed to the outer frame. A light consisting of a tracking drive permanent magnet made of a magnetic piece, an outer frame, and a focus parallel plate spring inserted between the upper and lower surfaces of the tracking movement frame to elastically support the tracking movement frame and the vertical and horizontal movement parts. A device for moving the objective lens up/down/left/right of a pick-up device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20699381A JPS58111136A (en) | 1981-12-23 | 1981-12-23 | Vertical and horizontal moving device for objective lens of light pick-up device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20699381A JPS58111136A (en) | 1981-12-23 | 1981-12-23 | Vertical and horizontal moving device for objective lens of light pick-up device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58111136A JPS58111136A (en) | 1983-07-02 |
| JPS6233657B2 true JPS6233657B2 (en) | 1987-07-22 |
Family
ID=16532403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20699381A Granted JPS58111136A (en) | 1981-12-23 | 1981-12-23 | Vertical and horizontal moving device for objective lens of light pick-up device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58111136A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4818066A (en) * | 1984-01-30 | 1989-04-04 | Canon Kabushiki Kaisha | Objective lens driving device |
| KR102131420B1 (en) * | 2013-12-04 | 2020-07-08 | 엘지이노텍 주식회사 | Motor for actuating lens |
| KR102484016B1 (en) * | 2021-02-17 | 2023-01-03 | 엘지이노텍 주식회사 | Motor for actuating lens |
-
1981
- 1981-12-23 JP JP20699381A patent/JPS58111136A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58111136A (en) | 1983-07-02 |
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