JPS6182337A - Pickup device - Google Patents
Pickup deviceInfo
- Publication number
- JPS6182337A JPS6182337A JP18502085A JP18502085A JPS6182337A JP S6182337 A JPS6182337 A JP S6182337A JP 18502085 A JP18502085 A JP 18502085A JP 18502085 A JP18502085 A JP 18502085A JP S6182337 A JPS6182337 A JP S6182337A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- coil
- optical axis
- coils
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- Mechanical Optical Scanning Systems (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は光学的に情報を記録したディスク、主としてビ
デオディスクプレーヤーのピックアップの改良に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the pickup of optically recorded information discs, primarily video disc players.
光学的に情報を記録したディスク、主に光学式ビデオデ
ィスクのプレーヤーのピックアップの働きとしては読み
取りビー１、をディスク面に集束させるフォーカシング
と、読み取りビームを情報トラックに追従さゼるトラッ
キングとがある。従来フォーカシングは対物レンツ゛を
光軸方向に動かし、トラッキングはガルバノミラ−を動
かして対物レンズに入射する読取り用のビームを（頃け
てそれぞれ行なっていた。The pickup functions of a player for optically recorded information, mainly optical video discs, include focusing, which focuses the reading beam 1 on the disk surface, and tracking, which causes the reading beam to follow the information track. . Conventionally, focusing was performed by moving the objective lens in the direction of the optical axis, and tracking was performed by moving a galvanometer mirror to direct the reading beam incident on the objective lens.
しかし、トラッキングを行なうためにガルバノミラ−、
を相当の高速度で動かずためにＩＩ大きな力が必要とな
り、また装置の機構は人がかりなものとなり、消費する
電力も大きくならざる、を得なかった。However, in order to perform tracking, a galvano mirror,
A large amount of force was required in order to keep the device moving at a fairly high speed, and the mechanism of the device required a lot of manual labor, necessitating a large amount of power consumption.
本発明は」−記欠点を解決した小型軽量のピックアップ
装置を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a small and lightweight pickup device that solves the above drawbacks.
本発明は記録媒体上に記録された情報を読み取るために
、レンズをレンズ光軸方向並びにレンズ光軸方向と直角
方向の二次元方向に馴′動するピンクアップ装置におい
て、
レンズ光軸を取り囲むように巻回されたレンジングと一
体的に移動すると共に、前記両コイルの一部が互にほぼ
直交状態で、交差するコイル部分、即ち交差部が形成さ
れるように両コイルを前記レンズに固定し、
前記交差部を貫ぬく共通の磁束と、前記両コイルへの通
電に基づき、前記交差部の両コイルの導線に作用する互
にほぼ直交する力を利用して前記レンズを前記二次元方
向に駆動するようにしたものである。In order to read information recorded on a recording medium, the present invention uses a pink-up device that moves a lens in the optical axis direction of the lens and in a two-dimensional direction perpendicular to the optical axis direction of the lens. Both coils are fixed to the lens so that the coils move integrally with the lensing wound around the lens, and parts of the coils are substantially orthogonal to each other, forming an intersecting coil portion, that is, an intersection. , the lens is moved in the two-dimensional direction by using a mutually orthogonal force acting on the conductors of both coils at the intersection, based on a common magnetic flux penetrating the intersection and energization of both the coils. It is designed to be driven.
以下図面に基づき本発明の詳細な説明する。The present invention will be described in detail below based on the drawings.
第１図はレンズ駆動機構の光軸に沿った断面図である。FIG. 1 is a cross-sectional view of the lens drive mechanism taken along the optical axis.
レンズ１２は円筒形にフランジのついた形状のレンズ枠
１３に取り（１けられ、レンズ枠１３はばね１４及びダ
ンパー１５を介してマグネットから成る磁界発生手段１
６に取り付けられている。ばね１４はレンズ１２の光軸
方向に曲がり、レンズ１２の半径方向にも伸縮性を有す
るものであり、従ってレンズ枠１３は光軸方向並びに半
径方向に動くことができる。The lens 12 is mounted in a cylindrical lens frame 13 with a flange.
It is attached to 6. The spring 14 is bent in the optical axis direction of the lens 12 and has elasticity in the radial direction of the lens 12, so that the lens frame 13 can move in the optical axis direction as well as in the radial direction.
さらにレンズ枠１３にはコイルボビン１７が取り（ｌけ
られてい”Ｃ１これに第２図に示す構造のコイルが形成
されている。第２図（ａ）はコイルの斜視図、第２図（
ｂ）ばコイルを光軸方向から見た図である。図示するよ
うにボビン１７の表面にはプリントコイルとすることが
できる４つのコイル１８〜２１が設けられており、更に
これらのコイル１８〜２１の上には光軸方向駆動用のコ
イル２２が巻かれている。Furthermore, a coil bobbin 17 is attached to the lens frame 13, and a coil having the structure shown in FIG. 2 is formed therein. FIG. 2(a) is a perspective view of the coil,
b) A diagram of the coil viewed from the optical axis direction. As shown in the figure, four coils 18 to 21, which can be printed coils, are provided on the surface of the bobbin 17, and a coil 22 for driving in the optical axis direction is wound on top of these coils 18 to 21. It's dark.
磁界発生手段１６によってギャップ２３には第３図（レ
ンズ駆動機構の光軸に垂直な断面図を示す）の様に外側
から内側へ向う磁界が形成されているので、コイル１８
〜２１に適当な方向の電流を流・ｌばレンズ１２が固定
されているボビン１７はレンズ光軸と直角な方向に動き
、またコイル２２に電流を流すとコイルボビン１７は光
軸方向に動く。A magnetic field directed from the outside to the inside is formed in the gap 23 by the magnetic field generating means 16 as shown in FIG.
When a current is passed in an appropriate direction through the coil 21, the bobbin 17 to which the lens 12 is fixed moves in a direction perpendicular to the optical axis of the lens, and when a current is passed through the coil 22, the coil bobbin 17 moves in the direction of the optical axis.
以下コイル１８〜２１への通電についての一例を以下に
説明する。″
コイル１８のコイル導線１８−１に関し紙面の上から下
へ向って（■印で示す）通電する。An example of energizing the coils 18 to 21 will be described below. '' The coil conducting wire 18-1 of the coil 18 is energized from the top to the bottom of the page (indicated by the ■ mark).
従ってコイル導線１８−２には紙面の下がら上に向って
（Ｏ印で示す）通電される。このとき、コイル１８のコ
イル導線１８−１にはフレミングの左手の法則に従いレ
ンズ光軸と直行する方向、即ちほぼＸ軸方向に力Ａが作
゛用する。一方コイル導線１８−２には同様にほぼＹ軸
方向の力Ｂが作用する。Therefore, the coil conducting wire 18-2 is energized upward from the bottom of the paper (indicated by O mark). At this time, a force A is applied to the coil conducting wire 18-1 of the coil 18 in a direction perpendicular to the lens optical axis, that is, approximately in the X-axis direction according to Fleming's left-hand rule. On the other hand, a force B approximately in the Y-axis direction similarly acts on the coil conducting wire 18-2.
一方、コイル１８″と対向するコイル２ｏのコイル導線
２０−１に、紙面の下から上に向って通電する。従って
コイル導線２０−２には紙面の上から下に向かって通電
されることになる。On the other hand, the coil conductor 20-1 of the coil 2o facing the coil 18'' is energized from the bottom to the top of the page. Therefore, the coil conductor 20-2 is energized from the top to the bottom of the page. Become.
このとき、コイル導線２０−１にはＸ軸方向の力Ｅ、コ
イル導線２０−２にはＹ軸方向の力Ｆが作用する。At this time, a force E in the X-axis direction acts on the coil conductor 20-1, and a force F in the Y-axis direction acts on the coil conductor 20-2.
以上の様に対向して配置されたコイル１８と２０に上記
の様な通電を行うと、各コイル導線１８−１．１８−２
．２０−１．２０−２のそれぞれに作用する力Ａ、Ｂ、
Ｅ、Ｆは合成されコイルボビンはＸ軸とＹ軸に４５度の
傾きを持つＸ軸方向に移動し、結果としてレンズ１２は
レンズ光軸と直角な方向に移動する。このＸ軸方向をト
ラック方向とほぼ直交する方向に設定すればコイル１８
及び２０にトラッキング信号を供給することによりレン
ズ“１２をトラッキング駆動させることができる。When the coils 18 and 20 arranged facing each other are energized as described above, each coil conductor 18-1, 18-2
．． 20-1. Forces A, B acting on each of 20-2,
E and F are combined, and the coil bobbin moves in the X-axis direction with an inclination of 45 degrees between the X-axis and the Y-axis, and as a result, the lens 12 moves in a direction perpendicular to the lens optical axis. If this X-axis direction is set almost perpendicular to the track direction, the coil 18
By supplying a tracking signal to the lens "12" and "20," the lens "12" can be driven for tracking.
一方、コイル１９について、コイル導線１９−１に関し
紙面の下から上へ向かって通電する。On the other hand, the coil 19 is energized from the bottom to the top of the drawing with respect to the coil conducting wire 19-1.
従って、コイル導線１９−２には紙面の上から下に向っ
て通電される。このときコイル導線１９−１にはＹ軸方
向の力Ｃが、コイル導線１９−２にはＸ軸方向と逆方向
の力りがそれぞれ作用する。Therefore, the coil conducting wire 19-2 is energized from the top to the bottom of the paper. At this time, a force C in the Y-axis direction acts on the coil conducting wire 19-1, and a force in the opposite direction to the X-axis direction acts on the coil conducting wire 19-2.
同様にコイル２１について、コイル導線２１−１に関し
紙面の上から下に向って通電する。Similarly, the coil 21 is energized from the top to the bottom of the paper with respect to the coil conducting wire 21-1.
従って、コイル導＆Ｈ１−２には紙面の下から上へ向っ
て電流が流れることになる。この結果コイル導線２１−
１にはＹ軸方向の力Ｇ、コイル導線２１−２にはＸ軸方
向とは逆方向の力１１がそれぞれ作用する。Therefore, a current flows through the coil conductor &H1-2 from the bottom to the top of the paper. As a result, the coil conductor 21-
A force G in the Y-axis direction acts on the coil conductor 21-2, and a force 11 in the opposite direction to the X-axis direction acts on the coil conductor 21-2.
以上の様にコイル１９及び２１の各コイルに上記の方向
で通電を行うと、コイル導線１９−１及び２１−１のそ
れぞれに作用するＹ軸方向の力Ｃ及びＧと、コイル１ｌ
ｌｓ１９−２及び２１−２のそれぞれに作用するＸ軸方
向と逆方向の力り及びＨの合成力によってレンズ１２を
Ｘ軸方向と直交するＷ軸方向へ移動させることになる。As described above, when each of the coils 19 and 21 is energized in the above direction, the forces C and G in the Y-axis direction acting on the coil conductors 19-1 and 21-1, respectively, and the coil 1l
The lens 12 is moved in the W-axis direction perpendicular to the X-axis direction by the force in the direction opposite to the X-axis direction acting on each of ls19-2 and ls19-2 and the combined force of H.
従って、このＷ軸方向を、はぼ情報トラック方向に設定
すれば、コイル１９及び２１にタイムベースコレクタ信
号を流すことによりレンズ１２をトラック方向に駆動さ
せることができる。Therefore, if this W-axis direction is set in the information track direction, the lens 12 can be driven in the track direction by flowing the time base collector signal to the coils 19 and 21.
更に本実施例においては４つのコイル１８〜２１に前記
の方向でトラッキング用信号を流すことによってレンズ
を第３図のＹ軸方向に駆動させることができる。この場
合コイル導線１９−２と２０−１のそれぞれに作用する
互に逆方向の力りとＥ、並びにコイル導線１８−１と２
１−２のそれぞれに作用する逆方向の力ＡとＩＩはお互
に相殺され、結果としてレンズ１２の移動には無関係な
力となり、Ｙ軸方向の力Ｂ。Furthermore, in this embodiment, the lens can be driven in the Y-axis direction in FIG. 3 by sending tracking signals to the four coils 18 to 21 in the aforementioned directions. In this case, the forces E acting in opposite directions on the coil conductors 19-2 and 20-1, and the coil conductors 18-1 and 2
Forces A and II in opposite directions acting on each of lenses 1-2 cancel each other out, resulting in a force unrelated to the movement of lens 12, and force B in the Y-axis direction.
Ｃ，Ｆ、Ｇの合成力によりレンズ１２をＹ軸方向に移動
させることができる。このＹ軸方向をディスクの情報ト
ラック方向とほぼ直交するようにピックアップ装置を設
置すれば、レンズ１２をトラッキング駆動させることが
できる。The lens 12 can be moved in the Y-axis direction by the combined force of C, F, and G. If the pickup device is installed so that the Y-axis direction is substantially orthogonal to the information track direction of the disk, the lens 12 can be driven for tracking.
−１二述した説明においてＸ軸方向及びＷ軸方向又はＹ
軸方向に関し、逆方向への移動は通電方向を一様に逆に
すれば可能であることは明らかである。-1 In the above description, the X-axis direction and W-axis direction or the Y-axis direction
Regarding the axial direction, it is clear that movement in the opposite direction is possible by uniformly reversing the direction of energization.
以］二の様に本発明はレンズ光軸を取り囲むように巻回
されたレンズ光軸方向駆動用のコイル体的に移動するよ
うにレンズに固定すると共に、両コイルの一部が互にほ
ぼ直交状態で交差するコイル部分（交差部）が形成され
るように両コイルを配置し、この交差部に共通の磁束を
貫ぬかせたとき、通電時において交差部の両コイルに作
用する互にほぼ直交する力を利用してレンズをレンズ光
軸方向とレンズ光軸方向と直角方向の二次元方向に駆動
するもので、その特徴する構成は第１，２コイルをレン
ズに一体的に固定すると共に交差部に共通の磁束を貰ぬ
かせた点にある。As described in [2] above, in the present invention, a coil for driving the lens optical axis is wound around the optical axis of the lens, and is fixed to the lens so as to be physically movable, and a portion of both coils are approximately aligned with each other. When both coils are arranged so that a coil part (crossing part) that intersects in an orthogonal state is formed, and a common magnetic flux is passed through this crossing part, the mutual magnetic flux that acts on both coils at the crossing part when energized is almost the same. This device uses orthogonal forces to drive the lens in two-dimensional directions: the direction of the lens optical axis and the direction perpendicular to the lens optical axis. Its characteristic structure is that the first and second coils are integrally fixed to the lens, and The point is that the common magnetic flux is not received at the intersection.
かかる構成としたことにより、本発明の磁界発生手段は
著しく簡単且つ小型なものとなり結果としてピックアッ
プ装置を小型にできるという効果を有するものである。With such a configuration, the magnetic field generating means of the present invention is extremely simple and compact, and as a result, the pickup device can be made compact.
なお本発明は上述した実施例に限られるものではなく、
又ビデオディスク再生装置に限らず、例えば音楽情報を
記録したディスク再生装置等にも使用できることはもち
ろんである。Note that the present invention is not limited to the above-mentioned embodiments,
It goes without saying that the present invention can be used not only for video disk playback devices but also for example for disk playback devices on which music information is recorded.
【図面の簡単な説明】
一９＝
第１図はレンズを各方向に動かず機構の一例を示す線図
、第２図（ａ）および（ｂ）はレンズを各方向に動かす
コイルの斜視図および光軸方向から見た線図、第３図は
レンズ駆動機構の光軸に垂直な断面図を示したものであ
る。[Brief explanation of the drawings] 19= Figure 1 is a diagram showing an example of a mechanism that does not move the lens in each direction, and Figures 2 (a) and (b) are perspective views of a coil that moves the lens in each direction. FIG. 3 shows a cross-sectional view of the lens drive mechanism perpendicular to the optical axis.
Claims (1)
をレンズ光軸方向並びにレンズ光軸方向と直角方向の二
次元方向に駆動するピックアップ装置において、 レンズ光軸を取り囲むように巻回されたレンズ光軸方向
駆動用の第１コイルとレンズ光軸方向と直角方向への駆
動用の偏平状の第２コイルとが前記レンズと一体的に移
動すると共に、前記両コイルの一部が互にほぼ直交状態
で交差するコイル部分、即ち交差部が形成されるように
両コイルをレンズに固定し、 前記交差部を貫ぬく共通の磁束と、前記両コイルへの通
電に基づき、前記交差部の両コイルの導線に作用する互
にほぼ直交する力を利用して前記レンズを前記二次元方
向に駆動するようにしたピックアップ装置。[Claims] In a pickup device that drives a lens in a two-dimensional direction in the direction of the optical axis of the lens and in a direction perpendicular to the direction of the optical axis of the lens in order to read information recorded on a recording medium, A first coil wound around the lens for driving the lens in the optical axis direction and a flat second coil for driving in the direction perpendicular to the lens optical axis move integrally with the lens. Both coils are fixed to the lens so that a coil portion, in other words, an intersection, is formed, with parts of the coils intersecting each other in a substantially orthogonal state, and based on a common magnetic flux passing through the intersection and energization of both coils. . A pickup device that drives the lens in the two-dimensional direction by using forces that are substantially orthogonal to each other and that act on the conductive wires of both coils at the intersection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60185020A JPH0612576B2 (en) | 1985-08-24 | 1985-08-24 | Pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60185020A JPH0612576B2 (en) | 1985-08-24 | 1985-08-24 | Pickup device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2678A Division JPS5494007A (en) | 1978-01-05 | 1978-01-05 | Pickup for disc recorder recorded optically with information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6182337A true JPS6182337A (en) | 1986-04-25 |
| JPH0612576B2 JPH0612576B2 (en) | 1994-02-16 |
Family
ID=16163367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60185020A Expired - Lifetime JPH0612576B2 (en) | 1985-08-24 | 1985-08-24 | Pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0612576B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5222056A (en) * | 1989-03-30 | 1993-06-22 | Asahi Kogaku Kogyo K.K. | Optical pickup apparatus having a compact structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935201U (en) * | 1972-06-30 | 1974-03-28 | ||
| JPS52138903A (en) * | 1976-05-12 | 1977-11-19 | Philips Nv | Optical scanner |
-
1985
- 1985-08-24 JP JP60185020A patent/JPH0612576B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4935201U (en) * | 1972-06-30 | 1974-03-28 | ||
| JPS52138903A (en) * | 1976-05-12 | 1977-11-19 | Philips Nv | Optical scanner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5222056A (en) * | 1989-03-30 | 1993-06-22 | Asahi Kogaku Kogyo K.K. | Optical pickup apparatus having a compact structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0612576B2 (en) | 1994-02-16 |
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