JPS58115635A - Pickup of optical disk player - Google Patents
Pickup of optical disk playerInfo
- Publication number
- JPS58115635A JPS58115635A JP20988681A JP20988681A JPS58115635A JP S58115635 A JPS58115635 A JP S58115635A JP 20988681 A JP20988681 A JP 20988681A JP 20988681 A JP20988681 A JP 20988681A JP S58115635 A JPS58115635 A JP S58115635A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- magnetic
- pickup
- track
- disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
Abstract
Description
【発明の詳細な説明】
こＯ発明は、ピディオディスクあるいはデジタルオーデ
ィオディスク（ＤムＤ）等に−Ｊ５ける光学式ディスク
プレーヤのピックアップに闘し１さらに詳しくは、対物
レンズを磁気機構によって浮かせ、かつ、ディスクのト
ラックに対して位置調整させるピックアップに係る。[Detailed Description of the Invention] The present invention deals with the pickup of an optical disc player such as a Pidio disc or a digital audio disc (DM).More specifically, the objective lens is floated by a magnetic mechanism. , and relates to a pickup whose position is adjusted relative to the track of the disk.
ピックアップは１デイスクが一転すゐと會に生じる１ｉ
ｌｉれに対物レンズを追随させてビフ）−にビー＾が焦
点を結ぶようＫさせ、また、ディスクが回転するＩＩＫ
偏心によって牛径方肉に生じるシラフタ振れにビームを
追随させ、さらに、スピンドルモーター〇回転むらある
いは偏心によって生じるトラックの接線方向の速度誤差
を吸収させる必要がある。The pickup is 1i that occurs in the meeting when 1 disc turns over.
The objective lens is made to follow the lens so that the beam is focused on
It is necessary to make the beam follow the shirafuta runout that occurs in beef radial meat due to eccentricity, and also to absorb speed errors in the tangential direction of the track caused by uneven rotation of the spindle motor or eccentricity.
従来、面振れに対しては対物レンズをフォーカス方向（
ディスクの面直方向）へ駆動させ・また・トラック振れ
に対してはトラッキング方向、速度岨差に対してはタン
ゼンシャル方向へビームをミラーで振っていたものがあ
った０
しかし、ミラーで振られたビームは、その光軸をトラッ
クに対して、垂直に維持することができず、ＯＮ比（復
調前の搬送波振幅と維音振輻との比）Ｖ劣化を生じてい
た。Conventionally, to prevent surface wobbling, the objective lens was moved in the focus direction (
In some cases, the beam was driven in the direction perpendicular to the surface of the disk (in the direction perpendicular to the surface of the disk), and the beam was swung by a mirror in the tracking direction for track runout, and in the tangential direction for speed differences. The beam could not maintain its optical axis perpendicular to the track, resulting in a deterioration of the ON ratio (ratio of carrier wave amplitude to fiber sound vibration before demodulation) V.
また、特開昭５５−１４６６３５号に記載されているよ
うに、対物レンズを板バネ等で支持し、磁石によって、
対物レンズをトラ、キング方向等へ駆動させるものがあ
った。In addition, as described in Japanese Patent Application Laid-Open No. 55-146635, the objective lens is supported by a leaf spring or the like, and a magnet is used to
There was one in which the objective lens was driven in the center and king directions.
しかしながら、板バネ等で支持していたため１対物レン
ズを駆動させる速度によっては、対物レンズが振動して
しまい、ビームに悪い影醤が生じる虞があり、良好な再
生画像および再生音を得ることができない場合があった
。However, since it is supported by a plate spring, etc., depending on the speed at which the objective lens is driven, there is a risk that the objective lens may vibrate and cause a negative shadow on the beam, making it difficult to obtain good reproduced images and reproduced sound. There were times when I couldn't do it.
この発明は、このような従来の問題点に着目してなされ
たもので、対物レンズを磁気機構を用いて浮かせ、かつ
、ディスクのトラックに対して位置調整させた光学式デ
ィスクプレーヤのピックアップとすることにより、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 in view of these conventional problems, and provides a pickup for an optical disc player in which an objective lens is made to float using a magnetic mechanism and its position is adjusted relative to the tracks of the disc. This aims to solve the above problems.
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１図および第２図はこの発明の第１実施例を示す図で
ある。FIGS. 1 and 2 are diagrams showing a first embodiment of the present invention.
まず構成を説明する。図中符号１は対物レンズが保持さ
れた筒状の対物レンズ枠で、ディスク２に対して離隔し
対向している。First, the configuration will be explained. In the figure, reference numeral 1 denotes a cylindrical objective lens frame holding an objective lens, which is opposed to and spaced from the disk 2.
このディスク２は、鋏像信号および音声信号が記録され
たトラックが、螺旋状に形成されており、図外のスピン
ドルモータで回転させられる。This disk 2 has a spiral track on which a scissor image signal and an audio signal are recorded, and is rotated by a spindle motor (not shown).
そして、対物レンズ枠１を有するピックアップ３は、図
外の送り機構によって、ディスク２に翅し半径方向に移
動自在とされている。このピックアップ３には、対物レ
ンズ枠１を浮上させ、かつ蔦ディスク２のトラックに対
しレーザー光の位置調整をさせる第１磁気機構４および
第２磁気機構５が設けられている。A pickup 3 having an objective lens frame 1 is mounted on the disk 2 and is movable in the radial direction by a feeding mechanism (not shown). The pickup 3 is provided with a first magnetic mechanism 4 and a second magnetic mechanism 5 that levitate the objective lens frame 1 and adjust the position of the laser beam relative to the track of the vine disk 2.
第１磁気機構４は、対物レンズ枠１の図中上部位置およ
び下部位置に設けられ、対物レンズ枠１の外周壁に円環
状の磁性部材４１が固着されている。The first magnetic mechanism 4 is provided at the upper and lower positions of the objective lens frame 1 in the figure, and an annular magnetic member 41 is fixed to the outer peripheral wall of the objective lens frame 1.
この磁性部材４＆に対応して２つの電磁石４ｂが設けら
れている。この電磁石４ｂは、第２図に示すように、略
Ｕ字状を呈し、対物レンズ枠１を中心としてトラッキン
グ方向Ｂに互いに対向して図示省略の部′材に固定され
、図外の駆動回路と接続されている。Two electromagnets 4b are provided corresponding to the magnetic members 4&. As shown in FIG. 2, the electromagnets 4b have a substantially U-shape, are fixed to a member (not shown) facing each other in the tracking direction B with the objective lens frame 1 as the center, and are connected to a drive circuit (not shown). is connected to.
一方、第２磁気機構５は、対物レンズ枠１が遊挿されｅ
ｌ１１日−り５＆と円環状のＩＩ２ヨーク５ｂとの間に
円環状の永久磁石５ｏが挾持されて、ボイスコイル願の
磁気回路が形成されている。この磁気回路を構成する部
材５＆＋５ｂ、５ａは、図示省略の部材に固定されてい
る。そして、対物レンズ枠１にボビン５ｄが固定され、
このボビン５ｄに巻かれたコイル５ｅが、磁気−路内の
ギャップム関に配置されている。On the other hand, the second magnetic mechanism 5 has the objective lens frame 1 loosely inserted therein.
An annular permanent magnet 5o is held between the annular II yoke 5b and the annular II yoke 5b to form a magnetic circuit of the voice coil. The members 5&+5b, 5a constituting this magnetic circuit are fixed to a member not shown. Then, the bobbin 5d is fixed to the objective lens frame 1,
A coil 5e wound around the bobbin 5d is placed at a gap in the magnetic path.
次に作用を説明する。ディスク２がスピンドルモータで
回転させられ、ディスク２に形成されたトラ、りに追随
するようにピックアップ３が半径方向へ移動させられる
。（スピンドルモータｃｚｆｉ転数とピックアップの位
置は無関係）
この際、ディスク２に面振れが生じると、フォーカス制
御信号が検出され、この信号が制御電流に変換され、第
２磁気機構５ｖコイル５・に流され、対物レンズ枠１が
フォーカス方向りに駆動されて、ビッシ面にビームの焦
点が結ばれる。ここで、制御電流が強い場合には、ディ
スク２の下方で浮かべられた対物レンズ枠１がさらに上
に押６し上げられ、ディスク２に接近する。Next, the effect will be explained. The disk 2 is rotated by a spindle motor, and the pickup 3 is moved in the radial direction so as to follow the tracks formed on the disk 2. (The rotation speed of the spindle motor czfi and the position of the pickup are unrelated.) At this time, when surface wobbling occurs on the disk 2, a focus control signal is detected, this signal is converted into a control current, and the second magnetic mechanism 5V coil 5. The objective lens frame 1 is driven in the focus direction, and the beam is focused on the Bissi plane. Here, when the control current is strong, the objective lens frame 1 floating below the disk 2 is further pushed upward 6 and approaches the disk 2.
また、ディスク２が偏心して回転し、半径方向にトラッ
ク振れが生じると、トラッキング制御信号が検出され、
この信号が制御電流に羨換され、第１磁気機構４Ｑ）電
磁石４ｂに流される。この制御電流が、対向している電
磁石４ｂ 、 ４ｂにトラッキング誤差信号の量に応じ
た差をつけて流され、それぞれの電磁石４ｂが磁性部材
４ａを引く電流の差に応じて生ずる吸引力の差によって
、対物レンズ枠１がトラッキング方向Ｂへ駆動される。Further, when the disk 2 rotates eccentrically and track runout occurs in the radial direction, a tracking control signal is detected,
This signal is converted into a control current and sent to the first magnetic mechanism 4Q) electromagnet 4b. This control current is applied to the opposing electromagnets 4b, 4b with a difference depending on the amount of the tracking error signal, and the difference in attractive force generated in accordance with the difference in the current that each electromagnet 4b draws on the magnetic member 4a. As a result, the objective lens frame 1 is driven in the tracking direction B.
この際、上下に設けられたＩＩＩ磁気機構４によって、
対物レンズ枠１は平行移動させられ、枠１内の対物レン
ズを通ったビームは、トラックに対し常に垂直で、トラ
ック振れに追随し、一本のトラックをなぞって行く。At this time, the III magnetic mechanism 4 provided above and below,
The objective lens frame 1 is moved in parallel, and the beam passing through the objective lens within the frame 1 is always perpendicular to the track, follows the track deflection, and traces a single track.
対物レンズ枠１は、ＩＩＩ磁気機構４および第２磁気機
構５の磁気作用によって、浮かべられて駆動させられて
おり、外部０ｆｉｉ＃が伝達されることはない。The objective lens frame 1 is floated and driven by the magnetic action of the III magnetic mechanism 4 and the second magnetic mechanism 5, and external 0fii# is not transmitted.
第３図には、第２実施例を示す。FIG. 3 shows a second embodiment.
この実施例は、第１実施例のＩｌｌｌｌ磁気機構４りに
第３磁気機構６を設けたものである。In this embodiment, a third magnetic mechanism 6 is provided in addition to the Illll magnetic mechanism 4 of the first embodiment.
ｊＩ３磁気機構６は、対物レンズ枠１の上部およ１
び下部に設けられ、２個の永久、、−石６＆と１個の
電磁石６ｂとからなっている。２個の永久磁石６＆は、
対物レンズ枠１の外周壁に、トラッキング方向Ｈに配置
され、しかも、互いに同じ極が外側に向けられて固定さ
れている。電磁石６ｂは、リップ溝形を呈し、端部６ｏ
、６ｏが永久磁石５ｃに所定間隔で対向シ、図外の部材
に固定されている。The jI3 magnetic mechanism 6 is attached to the upper part of the objective lens frame 1 and
It consists of two permanent magnets 6& and one electromagnet 6b. The two permanent magnets 6 &
They are arranged on the outer peripheral wall of the objective lens frame 1 in the tracking direction H, and are fixed with the same poles facing outward. The electromagnet 6b has a lip groove shape and has an end 6o.
, 6o are fixed to a member not shown, facing the permanent magnet 5c at a predetermined interval.
こ（ｔ）ｌ１３磁気機構６で対物レンズ枠ｌを所望の移
動方向に、所ｇ（Ｄ￥離だけ駆動させて調整するには
ｍ磁石６ｂに流す電流の向きを変え、永久磁石６＆との
反発位置と吸引位置とｔ逆転させて、所望の移動方向へ
駆動させ、電磁石６ｂに流す電流の強弱によって、所望
の距離だけ駆動させる。To adjust the objective lens frame l by driving it in the desired moving direction by a distance g (D\) using the l13 magnetic mechanism 6.
m Change the direction of the current flowing through the magnet 6b, reverse the repulsive position and attraction position with the permanent magnet 6&, drive it in the desired moving direction, and drive the desired distance by changing the strength of the current flowing through the electromagnet 6b. .
他の構成および作用は＠１実施例と同様であるので説明
を省略する。The other configurations and operations are the same as those in the @1 embodiment, so their explanations will be omitted.
第４図にはＩＩ３Ｉ３実施例す。FIG. 4 shows the II3I3 embodiment.
この実施例は、第１実施例の第１磁気機構４および＃！
２磁気機構５に、さらに、Ｗ！４磁気機構７を設けたも
のである。This embodiment uses the first magnetic mechanism 4 and #! of the first embodiment.
2 magnetic mechanism 5, furthermore, W! 4 magnetic mechanisms 7 are provided.
第４＠気機構７は、対物レンズ枠ｌの−Ｆ部および下部
で、Ｉ１１１１磁気４と略同位置に設けられている。こ
０第４磁気機構７は、ｍＩＭｉ気機構４０円環状の磁性
部材４ａ′ｆｔ使用し、この磁性部材４＆に対応してａ
ｌｌ磁気機構４の電磁石４ｂと同形Ｏ電磁石７ｍが２Ｉ
ｇ設けられている。この２個の電磁石７１はＸ第１磁気
機構４の電磁石４ｂが設けられているＦラッキング方向
Ｐさらにフォーカス方向りと直交する１タンゼンシヤル
方向０に配置されている０
スピンドルモータの回転むら等に起因して、トラックの
接線方向に速度誤差が生じると、タンゼンシャル制御信
号が検出され、この信号が制御電流に変換されて電磁石
７ａに流され、ＩＨ１磁気機構４と同様な作用により、
対物レンズ枠１はタンゼンシャル方向０に駆動される。The fourth @air mechanism 7 is provided at the -F section and lower part of the objective lens frame 1 at approximately the same position as the I1111 magnetic field 4. This fourth magnetic mechanism 7 uses an annular magnetic member 4a'ft of the mIMi mechanism 40, and a corresponding to this magnetic member 4&.
The O electromagnet 7m of the same shape as the electromagnet 4b of the ll magnetic mechanism 4 is 2I
g is provided. These two electromagnets 71 are arranged in the racking direction P, in which the electromagnet 4b of the first magnetic mechanism 4 is provided, and in the 1 tangential direction 0, which is perpendicular to the focusing direction. When a speed error occurs in the tangential direction of the track, a tangential control signal is detected, and this signal is converted into a control current and sent to the electromagnet 7a, and by the same action as the IH1 magnetic mechanism 4,
The objective lens frame 1 is driven in the tangential direction 0.
対物レンズ枠ｌを通るビームもタンゼンシャル方向０に
平行移動され、速度誤差が吸収される。The beam passing through the objective lens frame l is also translated in the tangential direction 0, and speed errors are absorbed.
他の構成および作用はＩｌｌ実施例と同様であるので説
明を省略する。The other configurations and operations are the same as those in the Ill embodiment, so their explanations will be omitted.
ａＳ図にはＩＩ４実施例を示す。The aS diagram shows the II4 embodiment.
この実施例は、１１１１実施例の第１磁気機構４の代り
に第５磁気機構８を設けたものである。In this embodiment, a fifth magnetic mechanism 8 is provided in place of the first magnetic mechanism 4 of the 1111 embodiment.
第５磁気機構８は、第２磁気機構５と同様な原理を利用
したもので、対物レンズ枠１の上部および下部に設けら
れている。まず、対物レンズ枠ｌの外周壁に、ボビン８
ａがトラ、キング方向Ｂに向けて固定され、このボビン
８ａにコイル＆が巻かれティる。一方、中心にボール８
ｃｔｆす２＋ｌ１１！−り８ｄと円環状の永久磁石８・
およびｌＩ ２３１−り８ｆとでボイスコイル型の磁気
回路が形成され、図外の部材に固定されている。この磁
気回路内のギヤ。The fifth magnetic mechanism 8 utilizes the same principle as the second magnetic mechanism 5, and is provided at the upper and lower parts of the objective lens frame 1. First, attach the bobbin 8 to the outer peripheral wall of the objective lens frame l.
A is fixed facing toward the front and back directions B, and a coil & is wound around this bobbin 8a. Meanwhile, ball 8 in the center
ctfsu2+l11! - 8d and an annular permanent magnet 8.
A voice coil type magnetic circuit is formed by the II 231-RI 8f, and is fixed to a member not shown. Gears in this magnetic circuit.
ジム間に前記コイル８ｂが配置されている。The coil 8b is arranged between the gyms.
ディスク２が半径方向にトラック振れを生じると、制御
電流がフィル８ｂに流され、対物レンズ枠ｌがトチ、キ
ング方向ＢＫ平行移動させられる。When the disk 2 causes track runout in the radial direction, a control current is applied to the filter 8b, and the objective lens frame 1 is moved in parallel in the leading and king directions BK.
他の構成および作用は第１実施例と同様であるので説明
を省略する。The other configurations and operations are the same as those in the first embodiment, so their explanations will be omitted.
第６図には１８５実施例を示す。FIG. 6 shows a 185 embodiment.
この実施例は、第１実施−の第１磁気機構４の代りに第
６磁気機構９を設けたものであ冬。In this embodiment, a sixth magnetic mechanism 9 is provided in place of the first magnetic mechanism 4 of the first embodiment.
ｌ！６磁気機構９も、第２磁気機構′５と同様な作用を
利用したもので、対物レンズ枠１の上部および下部に設
けられている。まず、対物レンズ枠１の外周壁に、円板
状にコイル９＆が巻がれ、このコイル９ａの周縁部が、
曹−り％、 ９ｃおよび永久磁石９ｄからなるボイスコ
イル蓋の磁気回路のギヤフッ１ＭＫ装置されている。こ
の磁気回路は、対物レンズ枠１に対し、Ｆラッキング方
向Ｂに設けられている。l! 6. The magnetic mechanism 9 also utilizes the same effect as the second magnetic mechanism '5, and is provided at the upper and lower portions of the objective lens frame 1. First, a coil 9& is wound around the outer peripheral wall of the objective lens frame 1 in a disc shape, and the peripheral edge of this coil 9a is
A gear hook 1MK device is used for the magnetic circuit of the voice coil lid, which consists of a carbon steel 9c and a permanent magnet 9d. This magnetic circuit is provided in the F racking direction B with respect to the objective lens frame 1.
ディスク２が半径方向にトラック振れを生じると、制御
電流がコイル９ａＫ流され、対物レンズ枠１がトラ、キ
ング方向Ｂへ平行移動させられる。When the disk 2 causes track runout in the radial direction, a control current is passed through the coil 9aK, and the objective lens frame 1 is moved in parallel in the front and back directions B.
この際１コイル９ａに対し適当な向きおよび強さの電流
を流すことによって、対物レンズ枠１が所望の移動方向
に所望の距離だけ駆動させられる。At this time, by passing a current of an appropriate direction and strength to one coil 9a, the objective lens frame 1 is driven by a desired distance in a desired moving direction.
他の構成および作用はＩ１１１１実施同様であるので説
明を省略する。The other configurations and operations are the same as in the I1111 implementation, so their explanations will be omitted.
第７図には第６実施例を示す。FIG. 7 shows a sixth embodiment.
この実施例は、ＩＩ５実施例の第６磁気機構のヨーク９
ｂ 、 ９ｃおよび永久磁石９ｄを電磁石１０ａとし、
１：：１
さらに１この電磁石１０＆を対物レンズ枠１に対しタン
ゼンシャル方向Ｃにも設けたものである。This embodiment is based on the yoke 9 of the sixth magnetic mechanism of the II5 embodiment.
b, 9c and the permanent magnet 9d as an electromagnet 10a,
1::1 Further, one electromagnet 10& is provided in the tangential direction C with respect to the objective lens frame 1.
この実施例では、トラ、キング制御信号およびタン七ン
シャル制御信号が変換された制御電流が、それぞれ所定
の電磁石１０ｍに流され、各電磁石１０ｍにおける電流
の向きおよび強さによって、対物レンズ枠１がトラッキ
ング方向およびタンゼンシャル方向へ駆動させられる。In this embodiment, control currents obtained by converting tiger, king control signals, and tangent control signals are respectively passed through predetermined electromagnets 10m, and the direction and strength of the current in each electromagnet 10m determines the direction of the objective lens frame 1. It is driven in the tracking direction and tangential direction.
なお、第４実施例における第５磁気機構８をタンゼンシ
ャル方向Ｃに設けることもできる。Note that the fifth magnetic mechanism 8 in the fourth embodiment can also be provided in the tangential direction C.
以上説明してきたように、この発明によれば、対物レン
ズを磁気機構を用いて浮上させ、かつ、ディスクのトラ
ックに対して位置調整させた光学式ディスクプレーヤの
ピックアップとしたため、ビームを常にトラックに対し
垂直に当てることができ、ＯＮ比が劣化することなく、
良質な信号を検出することができる。また、従来のよう
な板バネ等の支持を必要とせず、対物レンズが共振現象
を起こすことがないので、ディスクに投射されるビーム
に悪影響を及ぼすことがなく、良好な再生両像および再
生音を得ることができる。As explained above, according to the present invention, the objective lens is made to float using a magnetic mechanism and is used as a pickup for an optical disc player whose position is adjusted with respect to the track of the disc, so that the beam is always aligned with the track. It can be applied perpendicularly to the target without deteriorating the ON ratio.
Can detect high quality signals. Additionally, unlike conventional systems, support such as plate springs is not required, and the objective lens does not cause resonance, so there is no negative effect on the beam projected onto the disk, and good reproduction of both images and reproduction sound is achieved. can be obtained.
ｊＩＩ図はこの発明のＪＩ１１実施例のピックアップを
示す断面説明図、第２図は同ピックア、プの電磁石、磁
性部材および対物レンズ枠を示す平面図、１８３図は第
２実施例を示す第２図と同様な図、第４図は第３実施例
を示す第２図と同様な図、１１５図は８１４実施例を示
す５１１１図と同様な図、ＩＩ６図は１１５実施例を示
す第５図と同様な図、第７図は＠６実施例を示す１１４
図と同様な図である。
ｌ・・・１物レンズ枠、２・・・ディスク、３・・・ピ
ックアップ、４・・・第１磁気機構、４１・・・磁性部
材、４ｂ・・・電磁石、５・・・ＩＩ２磁気機構、５＆
・・・１１１ローク、５ｂ・・・第２Ｍ−り、５０・・
・永久磁石、５ｅ・・・コイル、６・・・Ｉｓ３磁気機
構、６＆・・・永久磁石、６ｂ・・・電磁石、７・・・
第４磁気機構、７ａ・・・電磁石、８・・・第５磁気機
構、ｂ・・・コイル、８ｄ・・・總１ｍ−り、８・・・
・永久磁石、８ｆ・・・第２ｍ−り、９・・・ＩＩ６Ｉ
６磁気機構＆・・・コイル、９ｂｌ ９０・・・冒−り
、９１１・・・永久磁石、ム・・・ギヤ、プ、Ｂ・・・
トラッキング方向、０・・・タン七ンシャル方向、Ｄ・
・・フォーカス方向。
第２図
第３図
−
第４図
第５図
第６図
第７図Figure 183 is a cross-sectional explanatory diagram showing the pickup of the JI11 embodiment of the present invention, Figure 2 is a plan view showing the electromagnet, magnetic member, and objective lens frame of the same pickup, and Figure 183 is a second diagram showing the pickup according to the second embodiment. Figure 4 is a diagram similar to Figure 2 showing the third embodiment, Figure 115 is a diagram similar to Figure 5111 showing the 814 embodiment, Figure II6 is Figure 5 showing the 115 embodiment. Figure 7 is similar to 114 showing the @6 embodiment.
It is a figure similar to the figure. l... Single object lens frame, 2... Disk, 3... Pickup, 4... First magnetic mechanism, 41... Magnetic member, 4b... Electromagnet, 5... II2 magnetic mechanism , 5&
...111 Rourke, 5b...2nd M-ri, 50...
・Permanent magnet, 5e...Coil, 6...Is3 magnetic mechanism, 6&...Permanent magnet, 6b...Electromagnet, 7...
4th magnetic mechanism, 7a... Electromagnet, 8... Fifth magnetic mechanism, b... Coil, 8d... 1 m long, 8...
・Permanent magnet, 8f...2nd m-ri, 9...II6I
6 Magnetic mechanism &...Coil, 9bl 90...Flash, 911...Permanent magnet, Mu...Gear, P, B...
Tracking direction, 0...Tangential direction, D.
...Focus direction. Figure 2 Figure 3 - Figure 4 Figure 5 Figure 6 Figure 7
Claims (1)
ィスクのシラツクに対して位置調整さ々々ことを特徴と
する光学式ディスクプレーヤのピックアップ０ （２）） 磁気機構は、対物レンズに取り付けられた少
なくとも２個の磁性部材あるいは磁石と、該磁性部材あ
るいは磁石に対応して設けられた電磁石とからなること
を特徴とする特許−求０＠ＩＩ膓１項記−の光学式ディ
スクプレーヤのピックアップ０ （２）磁気−一は、少なくとも２個のボイスコイル１１
ｔ）ａ気闘踏と、蒙磁気回路Ｏイ↑ツブ岡に介在し対物
レンズに取り付けられたコイルとからなることを曹徽と
する＊＊請求の＠ｍｌｍｌ第１晟記晟ｖ式デ４スクプレ
ーヤのピックアップ。 （４） 磁気―僕は、＃５’ｙ命ングおよびまたはタ
ンゼンシャル方向の調整用に装着されたことを特徴とす
る特許請求ＯＳＳ第２１１［記載の光学式ディスクプレ
ーヤのピックアップ。 （５） 磁気機構は、フォーカス、シックキング、タ
ン（ンシャルの各方向あるいはこれらを組み会わせた方
向Ｏ調整用に装着されたことを特徴とする特許請求ｏｍ
ｓｓａ項記ＩＩＯ光学式ディスクプレーヤのピックアッ
プ。[Scope of Claims] (1) A pickup for an optical disc player characterized in that the objective lens is floated using a magnetic mechanism and its position is adjusted with respect to the disk rack. (2) The magnetic mechanism is: The optical system according to the patent - request 0 @ II 膓 item 1 - characterized in that it consists of at least two magnetic members or magnets attached to an objective lens and an electromagnet provided corresponding to the magnetic members or magnets. (2) Magnetic disk player pickup 0 (2) Magnetic one has at least two voice coils 11
t) Cao Hui is composed of a air force and a magnetic circuit Oi ↑ a coil interposed in the tube oka and attached to the objective lens. Scraplayer pickup. (4) Magnetic pickup for an optical disc player according to claim OSS No. 211, characterized in that the pickup is installed for adjusting the #5'y direction and/or the tangential direction. (5) A patent claim characterized in that the magnetic mechanism is attached to adjust the focus, thickening, and tangential directions, or a combination of these directions.
SSA Item IIO Optical Disc Player Pickup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20988681A JPS58115635A (en) | 1981-12-28 | 1981-12-28 | Pickup of optical disk player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20988681A JPS58115635A (en) | 1981-12-28 | 1981-12-28 | Pickup of optical disk player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58115635A true JPS58115635A (en) | 1983-07-09 |
Family
ID=16580271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20988681A Pending JPS58115635A (en) | 1981-12-28 | 1981-12-28 | Pickup of optical disk player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58115635A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100761630B1 (en) | 2003-04-16 | 2007-09-27 | 니혼 덴산 산쿄 가부시키가이샤 | Apparatus for driving lens and mobile equipment having camera attached thereto |
-
1981
- 1981-12-28 JP JP20988681A patent/JPS58115635A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100761630B1 (en) | 2003-04-16 | 2007-09-27 | 니혼 덴산 산쿄 가부시키가이샤 | Apparatus for driving lens and mobile equipment having camera attached thereto |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4472024A (en) | Apparatus for driving objective lens | |
| US20040052180A1 (en) | Optical pick-up actuator | |
| GB2133575A (en) | Optical system support and positioning device for use in an optical reading apparatus | |
| US4408313A (en) | Objective lens driving device for tracking and focus corrections | |
| US20100067353A1 (en) | Objective lens actuator and a disc apparatus applying the same therein | |
| EP0442443B1 (en) | Optical unit actuator for information recording/reproducing apparatus | |
| US5050158A (en) | Magnetic clamp for a disk medium | |
| US4796248A (en) | Objective lens drive device | |
| JPS58115635A (en) | Pickup of optical disk player | |
| JPS6349294B2 (en) | ||
| US7272840B2 (en) | Objective lens driving apparatus used with an optical pickup | |
| KR100230268B1 (en) | Operation device of objective lens | |
| KR19990079635A (en) | Optical Pickup Actuator Using Concentrated Magnetization | |
| JPH0522297B2 (en) | ||
| JPS58137140A (en) | Optical system driving device of optical information recording and reproducing device | |
| JPS6089838A (en) | Device for setting neutral position in track direction of objective lens driver in optical information recording and reproducing device | |
| JPS6076039A (en) | Objective lens driver | |
| KR100220965B1 (en) | A tracking apparatus of actuator | |
| KR970003483Y1 (en) | Object lens driving apparatus for optical pick-up | |
| JPH08194962A (en) | Biaxial actuator | |
| JPS6185640A (en) | Optical head device | |
| SU847355A1 (en) | Head for contact-free optical reproducing of information | |
| JPS624908Y2 (en) | ||
| JPH0150012B2 (en) | ||
| KR19980019661U (en) | Objective lens drive |