JPS635806B2 - - Google Patents
Info
- Publication number
- JPS635806B2 JPS635806B2 JP3850582A JP3850582A JPS635806B2 JP S635806 B2 JPS635806 B2 JP S635806B2 JP 3850582 A JP3850582 A JP 3850582A JP 3850582 A JP3850582 A JP 3850582A JP S635806 B2 JPS635806 B2 JP S635806B2
- Authority
- JP
- Japan
- Prior art keywords
- tracking
- fixed
- focus
- optical pickup
- permanent magnet
- 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 26
- 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
Landscapes
- 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トラツキング移動枠、フ
オーカス用平行板バネおよび上下左右移動部を介
して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 in an optical pickup device, and particularly relates to a device for moving an objective lens vertically and horizontally in an optical pickup device, and in particular, a tracking drive unit and a focus drive unit are moved via a tracking movement frame, a parallel plate spring for focus, and a vertical and horizontal movement unit. The present invention relates to a device for vertically and horizontally moving an objective lens of an optical pickup device, which is arranged parallel to and on the same line as a disk, and uses a pair of square bar-shaped permanent magnets as focus drive permanent magnets.
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Ｄ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 D.
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
と光ピツクアツプハウジングが同一側にある場
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光ピツクアツプハ
ウジング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が円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 optical pickup housing are on the same side, when picking up the inner circumference of the disk, the separation distance R1 between the optical axis and the outer surface of the optical pickup housing in the disk radial direction must be as small as possible. Although this is preferable, there is a problem in that 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 in a concentric circle, so 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
オーカス駆動部をトラツキング移動枠、フオーカ
ス用平行板バネおよび上下左右移動部を介してデ
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。 This invention has been made by focusing on the problems of the prior art, and is designed to move the tracking drive section and the focus drive section relative to the disk via a tracking movement frame, a parallel plate spring for focus, and an up/down/left/right movement section. It is an object of the present invention to solve the above-mentioned problems by arranging the permanent magnets in parallel and on the same line and using a pair of rectangular bar-shaped permanent magnets as focus drive permanent magnets.
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は光ピ
ツクアツプハウジング１２のトラツキング移動方
向（Ｘ軸方向）と平行な両側壁１２Ａ，１２Ｂの
内側に固定され、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 is fixed inside both side walls 12A and 12B of the optical pickup housing 12 which are parallel to the tracking movement direction (X-axis direction), and the longitudinal direction thereof is parallel to the tracking movement direction (X-axis direction). .
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、円筒形状のも
のよりも第４図に示す光軸と光ピツクアツプハウ
ジング１２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の中間部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が装着されている。１５はフ
オーカス用平行板バネで、上下左右移動部１３の
右端上部および右端下部にその一端が固定される
とともに長方形のトラツキング移動枠１６の右端
１６Ｒ上部および右端１６Ｒ下部にその他端が固
定されて形成されている。そしてフオーカス用平
行板バネ１５はトラツキング移動枠１６の右端で
上下左右移動部１３を片持ちでフオーカス移動方
向（Ｚ軸方向）自在に弾性支持する。なお平行板
バネとしたのはフオーカス（Ｚ軸方向）制御のと
き対物レンズ１のＺ軸が傾くのを防ぐためであ
る。１７はトラツキング制御用角形コイルで、ト
ラツキグ移動枠１６の左端１６Ｌ内壁にその一端
が固定されるとともに右端１６Ｒ側にその他端が
突出して形成されている。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
び平面逆Ｌ字状の磁性片１８Ｄおよび１８Ｅとか
ら構成されている。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が形成されている。トラツ
キング駆動用永久磁石１８はトラツキング移動枠
１６内に収納できる大きさであり、トラツキング
移動枠１６内において支持板１８Ｇ上に固定され
ている。支持板１８Ｇはトラツキング移動枠１６
のトラツキング移動方向（Ｘ軸方向）と平行な両
側壁１６Ｓに穿設された透孔１６Ｐを貫通し、そ
の両端は光ピツクアツプハウジング１２の両側壁
１２Ａ，１２Ｂの内側に固定されている。トラツ
キング駆動用永久磁石１８の空隙部１８Ｆにはト
ラツキング制御用角形コイル１７が挿入されてい
る。１９はトラツキング用平行板バネで、トラツ
キング移動枠１６の左端１６Ｌおよび右端１６Ｒ
外壁に中間部が固定されるとともに光ピツクアツ
プハウジング１２の両側壁１２Ａ，１２Ｂの内側
に両端部が固定されて形成されている。そしてト
ラツキング用平行板バネ１９はトラツキング移動
枠１６をトラツキング移動方向（Ｘ軸方向）自在
に弾性支持する。なおトラツキング用平行板バネ
１９の両端部の固定は、光ピツクアツプハウジン
グ１２の両側壁１２Ａ，１２Ｂの内側に突設され
た取付片１２Ｃにしてもよい。 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 optical pickup housing 12 shown in FIG. 4 can be made smaller than when using a cylindrical magnet. 13 is a vertically and horizontally moving section, which is a cube. A focus control rectangular coil 14 disposed in the gap 11D of the focus drive permanent magnet 11 is protruded around the middle of the vertical and horizontal moving section 13, and the objective lens 1 is attached to the center. Reference numeral 15 denotes a focus parallel plate spring, one end of which is fixed to the upper right end and the lower right end of the vertical and horizontal moving section 13, and the other end is fixed to the upper right end 16R and the lower right end 16R of the rectangular tracking movement frame 16. has been done. The focus parallel plate spring 15 elastically supports the up/down/left/right moving section 13 at the right end of the tracking moving frame 16 in a cantilevered manner so as to freely move the focus in the focus moving direction (Z-axis direction). The parallel plate springs are used to prevent the Z-axis of the objective lens 1 from tilting during focus (Z-axis direction) control. Reference numeral 17 denotes a rectangular coil for tracking control, one end of which is fixed to the inner wall of the left end 16L of the tracking moving frame 16, and the other end protrudes toward the right end 16R. 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-shaped and flat reversed magnetic piece 18C fixed to the N pole side of the two permanent magnet pieces. It is composed of L-shaped magnetic pieces 18D and 18E. And between the magnetic piece 18C and the magnetic piece 18D and between the magnetic piece 18C and the magnetic piece 18E
A gap 18F is formed between the two. The tracking drive permanent magnet 18 has a size that can be accommodated within the tracking movement frame 16, and is fixed on a support plate 18G within the tracking movement frame 16. The support plate 18G is the tracking movement frame 16
It passes through a through hole 16P formed in both side walls 16S parallel to the tracking movement direction (X-axis direction), and both ends thereof are fixed inside the both side walls 12A, 12B of the optical pickup housing 12. A square coil 17 for tracking control is inserted into the gap 18F of the permanent magnet 18 for tracking drive. Reference numeral 19 denotes a parallel leaf spring for tracking, which is attached to the left end 16L and right end 16R of the tracking movement frame 16.
An intermediate portion is fixed to the outer wall, and both end portions are fixed to the inner sides of both side walls 12A and 12B of the optical pickup housing 12. The tracking parallel leaf spring 19 elastically supports the tracking movement frame 16 freely in the tracking movement direction (X-axis direction). Note that both ends of the tracking parallel plate spring 19 may be fixed to mounting pieces 12C that protrude inside both side walls 12A and 12B of the optical pickup housing 12.
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、トラツキング移動枠１６、
フオーカス用平行板バネ１５および上下左右移動
部１３を介して、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
オーカス駆動部とデイスクＤに対して平行でかつ
同一線上に配置される。したがつて第５図に示す
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。なお、フオーカス制御用角形コイル１４の長
手方向（Ｘ軸方向）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。さらにはトラツキング移動枠１
６の透孔１６Ｐ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１６が支持板
１８Ｇに接触しないように定める。 In this way, the tracking drive section consisting of the tracking drive permanent magnet 18 and the tracking control rectangular coil 17 includes the tracking movement frame 16,
The focus drive permanent magnet 11 is connected via the focus parallel plate spring 15 and the vertical and horizontal moving parts 13
A focus drive section consisting of a rectangular focus control coil 14 and a focus control rectangular coil 14 are arranged parallel to and on the same line with the disk D. Therefore, the size H2 in the Z-axis direction of the optical pickup device shown in FIG. 5 is reduced, and the optical pickup device can be made thinner. The size of the focus control rectangular coil 14 in the longitudinal direction (X-axis 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). Furthermore, tracking moving frame 1
The size of the through hole 16P of No. 6 is determined by the tracking movement (X
axial direction), the tracking moving frame 16 is set so as not to come into contact with the support plate 18G.
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１５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はトラツキング移動枠１６と一体
となり、トラツキング移動枠１６に取り付けられ
ているトラツキング用平行板バネ１９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
ング移動枠１６、フオーカス用平行板バネ１５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５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２
１、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 action 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 15, 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 tracking control rectangular coil 17 is integrated with the tracking moving frame 16 and is elastically supported in the left-right direction (X-axis direction) by the tracking parallel plate spring 19 attached to the tracking moving frame 16. direction (X-axis direction). Therefore, the objective lens 1, which is integrated with the square coil 17 for tracking control, the tracking moving frame 16, the parallel plate spring 15 for focusing, and the vertically and horizontally 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 directing the laser beam of the semiconductor laser 20 to the collimator lens 2 as shown in FIG.
1. Polarizing beam splitter 22, 1/4 wavelength plate 23,
The reflected light from the disk D is guided to the 90° deflection mirror 24 and the objective lens 1, and then returned to the polarizing beam splitter 22 in the reverse order, deflected by 90°, and guided to the 4-split sensor via a light shielding plate (not shown) and a converging lens. I'm getting it.
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トラツキング
移動枠、フオーカス用平行板バネおよび上下左右
移動部を介して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ハウジングの外面との
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 described above, the present invention arranges the tracking drive section and the focus drive section parallel to and on the same line with the disk via the tracking movement frame, the parallel plate spring for focus, and the up/down and left/right movement section. By using a pair of rectangular rod-shaped permanent magnets for driving, it is possible to make the optical pickup device thinner, and the distance between the optical axis and the outer surface of the optical pickup housing can be reduced. Effects can be 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図はこ
の発明の一実施例を示す平面図、第５図は光学系
を含めた第４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……光ピツクアツプハウジング、１３…
…上下左右移動部、１４……フオーカス制御用角
形コイル、１５……フオーカス用平行板バネ、１
６……トラツキング移動枠、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……トラツキング用平行板バ
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 cross-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 embodiment of the present invention. FIG. 5, which is a plan view showing an example, is a schematic cross-sectional view taken along the line AA' in FIG. 4, including the optical system. 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 ... Optical pickup housing, 13 ...
... Up/down/left/right moving part, 14... Square coil for focus control, 15... Parallel plate spring for focus, 1
6... Tracking moving frame, 17... Rectangular coil for tracking control, 18... Permanent magnet for tracking drive, 19... Parallel plate spring for tracking, 20... Semiconductor laser, 21... Collimator lens, 22... Polarized light Beam splitter, 23...
...1/4 wavelength plate, 24...90° deflection mirror.
Claims (1)
動方向と平行な両側壁の内側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
イルが中間部に突設周設されるとともに対物レン
ズが中央部に装着された上下左右移動部と、該上
下左右移動部の右端上・下部に一端が固定される
とともにトラツキング移動枠の右端上・下部に他
端が固定されて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、該トラツキング移動
枠の左端内壁に一端が固定されるとともに右端側
に他端が突出しているトラツキング制御用角形コ
イルと、該トラツキング移動枠のトラツキング移
動方向と平行な両側壁に穿設された透孔を貫通し
両端が光ピツクアツプハウジングのトラツキング
移動方向と平行な両側壁の内側に固定された支持
板上の該トラツキング移動枠内の位置に固定され
るとともに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る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、該トラツ
キング移動枠の左端・右端外壁に中間部が固定さ
れるとともに該光ピツクアツプハウジングのトラ
ツキング移動方向と平行な両側壁の内側に両端部
が固定されて該トラツキング移動枠を弾性支持す
るトラツキング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 pair of rectangular rod-shaped focus drive permanent magnets made of a permanent magnet piece and a magnetic piece fixed to the inside of both side walls parallel to the tracking movement direction of the optical pickup housing, and a gap between the focus drive permanent magnets. A rectangular coil for focus control is disposed in the middle part, and an objective lens is attached to the center part of the vertically and horizontally moving part, and one end is fixed to the upper and lower right ends of the vertically and horizontally moving part. a parallel plate spring for focusing, the other end of which is fixed to the top and bottom of the right end of the tracking moving frame to elastically support the vertical and horizontal moving part; A rectangular coil for tracking control whose other end protrudes, and both ends of the tracking movement frame pass through a through hole drilled in both walls parallel to the tracking movement direction of the optical pickup housing. Tracking drive consisting of a permanent magnet piece and a magnetic piece that are fixed at a position within the tracking movement frame on a support plate fixed to the inside of the coil, and a part of which is inserted into the hollow part of the tracking control rectangular coil. A permanent magnet, an intermediate portion fixed to the left and right outer walls of the tracking moving frame, and both end portions fixed to the inner sides of both side walls parallel to the tracking moving direction of the optical pickup housing to elastically support the tracking moving frame. A device for vertically and horizontally moving an objective lens of an optical pickup device, comprising a parallel plate spring for tracking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3850582A JPS58155529A (en) | 1982-03-11 | 1982-03-11 | Up, down, left and right shifting device of objective lens for optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3850582A JPS58155529A (en) | 1982-03-11 | 1982-03-11 | Up, down, left and right shifting device of objective lens for optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58155529A JPS58155529A (en) | 1983-09-16 |
| JPS635806B2 true JPS635806B2 (en) | 1988-02-05 |
Family
ID=12527122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3850582A Granted JPS58155529A (en) | 1982-03-11 | 1982-03-11 | Up, down, left and right shifting device of objective lens for optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58155529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10696590B2 (en) | 2012-06-01 | 2020-06-30 | Db Group (Holdings) Ltd | Activator composition and method for making concrete |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4818066A (en) * | 1984-01-30 | 1989-04-04 | Canon Kabushiki Kaisha | Objective lens driving device |
-
1982
- 1982-03-11 JP JP3850582A patent/JPS58155529A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10696590B2 (en) | 2012-06-01 | 2020-06-30 | Db Group (Holdings) Ltd | Activator composition and method for making concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58155529A (en) | 1983-09-16 |
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