JPS6233658B2 - - Google Patents
Info
- Publication number
- JPS6233658B2 JPS6233658B2 JP20699481A JP20699481A JPS6233658B2 JP S6233658 B2 JPS6233658 B2 JP S6233658B2 JP 20699481 A JP20699481 A JP 20699481A JP 20699481 A JP20699481 A JP 20699481A JP S6233658 B2 JPS6233658 B2 JP S6233658B2
- Authority
- JP
- Japan
- Prior art keywords
- tracking
- permanent magnet
- focus
- fixing base
- plate spring
- 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
- 230000003287 optical effect Effects 0.000 claims description 13
- 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
- 230000004907 flux Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000000694 effects 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
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 device for vertically and horizontally moving an objective lens of an optical pickup device using a pair of square rods.
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。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 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. 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. However, since the focus drive section consisting of the voice coil 5 and the voice coil electromagnetic drive section 8 and the objective lens 1 are arranged concentrically, there is a problem that it is impossible to make the size smaller beyond a certain point.
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
石として一対の角棒状のものを用いることによつ
て上記問題点を解決することを目的としている。 The present invention has been made by focusing on the problems of the prior art, and includes arranging a tracking drive section and a focus drive section parallel to and on the same line with respect to the disk, and using a pair of corner magnets as focus drive permanent magnets. The purpose is to solve the above problems by using a rod-shaped object.
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
る永久磁石片１１Ａより大きい断面長方形の磁性
片１１Ｂと、永久磁石片１１Ａの下面に固定され
る断面Ｌ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は永久
磁石固定台１１Ｅの中央部に穿設された透孔１１
Ｆを挾んで永久磁石固定台１１Ｅに固定され、そ
の長手方向はトラツキング移動方向（Ｘ軸方向）
と平行である。 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 a rectangular cross section larger than the permanent magnet piece 11A fixed to the upper surface of the permanent magnet piece 11A, and a magnetic piece 11B fixed to the lower surface of the permanent magnet piece 11A. A gap 11D is formed between the magnetic pieces 11B and 11C. The focus drive permanent magnet 11 has a through hole 11 bored in the center of the permanent magnet fixing base 11E.
F is fixed to the permanent magnet fixing base 11E with F in between, and its longitudinal direction is the tracking movement direction (X-axis direction).
is parallel to
フオーカス駆動用永久磁石１１として１対の角
棒形状のものを用いることにより、第４図に示す
如く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ス駆動用永久磁
石１１の空隙部１１Ｄに配置されるフオーカス制
御用角形コイル１４が突設周設され、中央部には
対物レンズ１が装着され、または中央部から下向
に中空円柱の下部支持片１３Ａが突設されてい
る。下部支持片１３Ａは透孔１１Ｆを挿通する。
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。永久磁石
固定台１１Ｅは長方形孔１５Ａを挿通し、その両
端は外枠１２に固定されている。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用平行板バ
ネ１６の右側面中央部に取り付けられている。左
側のトラツキング用平行板バネ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，１８
Ｂ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１８Ｃ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１
８Ｆ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上に配置される。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。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、フオ
ーカス駆動用永久磁石１１に接触しいように定め
る。 By using a pair of rectangular bar-shaped permanent magnets 11 for focus driving, the separation distance R 2 between the optical axis and the outer surface of the pickup body can be made smaller than that using a cylindrical magnet as shown in FIG. 13
is a part that moves vertically and horizontally, and is a cube. A square coil 14 for focus control, which is disposed in the gap 11D of the permanent magnet 11 for focus driving, is protrudingly provided on the four side walls of the vertical and horizontal moving part 13, and the objective lens 1 is attached to the center part, or A hollow cylindrical lower support piece 13A projects downward from the center. The lower support piece 13A is inserted through the through hole 11F.
Reference numeral 15 denotes a tracking moving frame whose size is larger than that of the focus control rectangular coil 14. Rectangular holes 15A are formed on both side surfaces parallel to the tracking movement direction (X-axis direction). The permanent magnet fixing base 11E is inserted through the rectangular hole 15A, and both ends thereof are fixed to the outer frame 12. 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 side parallel plate spring 16 for tracking. The left side of the left tracking parallel leaf spring 16 is
It is in contact with the outer frame 12. 18 is a permanent magnet for tracking drive, and two permanent magnet pieces 18A, 18
B, a flat T-shaped magnetic piece 18C sandwiched between the S poles of the two permanent magnet pieces 18A and 18B, and a flat L-shape and flat surface fixed to the N pole sides of the two permanent magnet pieces. It is composed of letter-shaped magnetic pieces 18D and 18E. And magnetic piece 18C and magnetic piece 18D
A gap 18F is formed between the magnetic pieces 18C and 18E. A tracking drive permanent magnet 18 is fixed to the outer frame 12 and
A rectangular coil 17 for tracking control is inserted into 8F. 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 of the optical pickup device in the Z-axis direction
H 2 becomes smaller, 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. 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 it comes 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１６、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１
６、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゜偏向ミラー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 integrated with the parallel plate spring 16 for tracking and the tracking moving frame 15, and is moved in the left-right direction (X-axis direction) by the parallel plate spring 16 for tracking attached to the tracking moving frame 15.
Since it is elastically supported, it moves in the left-right direction (X-axis direction). Therefore, the square coil 17 for tracking control and the parallel plate spring 1 for tracking
6. The objective lens 1, which is integrated with the tracking moving frame 15, the focusing parallel leaf spring 19, and the vertical and horizontal moving section 13, also moves in the left-right direction (X-axis 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 the tracking error signal are generated by converting the laser beam of the semiconductor laser 20 into the collimator lens 21, polarizing beam splitter 22, 1/2 as shown in FIG.
The reflected light from the disk D is guided to a four-wave plate 23, a 90° deflection mirror 24, and an objective lens 1, and is returned to the polarizing beam splitter 22 in the reverse order, deflected by 90°, and then passes through a light shielding plate and a converging lens (not shown). It is obtained by guiding it to a 4-split sensor.
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 is achieved by arranging the tracking drive section and the focus drive section parallel to the disk and on the same line, and using a pair of square rod-shaped permanent magnets as the focus drive permanent magnets. As a result, the optical pickup device can be made thinner, and the distance between the optical axis and the outer surface of the optical pickup device can be reduced.
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
両端が外枠に固定されかつ中央部に穿設された透
孔を有する永久磁石固定台と、該永久磁石固定台
の透孔を挾んでトラツキング移動方向と平行に該
永久磁石固定台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
設され中央部に対物レンズが装着されるとともに
中央部から該永久磁石固定台の透孔を挿通する下
向の中空円柱である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 permanent magnet fixing base which is fixed to the outer frame at both ends through rectangular holes drilled on both sides parallel to the tracking movement direction of the tracking moving frame and has a through hole drilled in the center; A pair of square rod-shaped focus drive permanent magnets, each consisting of a permanent magnet piece and a magnetic piece, fixed to the permanent magnet fixing base parallel to the tracking movement direction by sandwiching a through hole in the magnet fixing base; A rectangular focus control coil placed in the gap of the permanent magnet is protruded around the circumference, an objective lens is attached to the center part, and a downward hollow cylinder is inserted from the center through the through hole of the permanent magnet fixing base. A vertical and horizontal moving part from which a certain lower support piece is protruded, a tracking parallel plate spring attached to both sides of the tracking movement frame perpendicular to the tracking movement direction, and the right side of the tracking parallel plate spring on the right side. A permanent magnet for tracking drive consisting of a square coil for tracking control fixed to the center of the surface, and a permanent magnet piece and a magnetic piece partially inserted into the hollow part of the square coil for tracking control and fixed to the outer frame. A device for vertically and horizontally moving an objective lens of an optical pickup device, comprising: an outer frame, and a focus parallel plate spring inserted between the upper and lower surfaces of the tracking moving frame to elastically support the tracking moving frame and the vertically and horizontally moving section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20699481A JPS58111137A (en) | 1981-12-23 | 1981-12-23 | Vertical and horizontal moving device for objective lens of light pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20699481A JPS58111137A (en) | 1981-12-23 | 1981-12-23 | Vertical and horizontal moving device for objective lens of light pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58111137A JPS58111137A (en) | 1983-07-02 |
| JPS6233658B2 true JPS6233658B2 (en) | 1987-07-22 |
Family
ID=16532420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20699481A Granted JPS58111137A (en) | 1981-12-23 | 1981-12-23 | Vertical and horizontal moving device for objective lens of light pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58111137A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0158829U (en) * | 1987-10-09 | 1989-04-13 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6236736A (en) * | 1985-08-12 | 1987-02-17 | Pioneer Electronic Corp | Optical pickup device |
| US5001694A (en) * | 1986-05-06 | 1991-03-19 | Pencom International Corp. | Tracking and focus actuator for a holographic optical head |
-
1981
- 1981-12-23 JP JP20699481A patent/JPS58111137A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0158829U (en) * | 1987-10-09 | 1989-04-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58111137A (en) | 1983-07-02 |
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