JPS6364638A - Objective lens supporting device for optical recording and reproducing device - Google Patents
Objective lens supporting device for optical recording and reproducing deviceInfo
- Publication number
- JPS6364638A JPS6364638A JP20834986A JP20834986A JPS6364638A JP S6364638 A JPS6364638 A JP S6364638A JP 20834986 A JP20834986 A JP 20834986A JP 20834986 A JP20834986 A JP 20834986A JP S6364638 A JPS6364638 A JP S6364638A
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- conductive plate
- magnetic
- lens
- leaf 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims description 7
- 230000004907 flux Effects 0.000 claims abstract description 4
- 239000004020 conductor Substances 0.000 description 15
- 238000013016 damping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011345 viscous material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は丸字式記録再生装置の対物レンズ支持装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an objective lens support device for a round type recording/reproducing device.
本発明は光学的記録再生装置の対物レンズ支持装置にお
いて、固定部に構成された磁気回路の磁束中を対物レン
ズを支持する可動部材に固着された非磁性導体板が移動
する溝造により、可動部材に減衰力を与え、記録、再生
に有害な前記対物レンズの共振を低減させたものである
。The present invention provides an objective lens support device for an optical recording/reproducing device, in which a non-magnetic conductive plate fixed to a movable member supporting the objective lens moves through the magnetic flux of a magnetic circuit configured in a fixed part. A damping force is applied to the member to reduce the resonance of the objective lens that is harmful to recording and reproduction.
従来特開昭６０−２９９４５に記載され第２図に示すよ
うに、板バネの表面もしくは投数の板バネ間に粘性材あ
るいは緩衝材を密着させた対物レンズ支持装置が知られ
ていた。As described in Japanese Unexamined Patent Publication No. 60-29945 and shown in FIG. 2, an objective lens support device has been known in which a viscous material or a cushioning material is brought into close contact with the surface of a leaf spring or between a number of leaf springs.
しかし、従来の対物レンズ支持装置は粘性材。 However, conventional objective lens support devices are made of viscous material.
もしくは緩衝材の変型庖度に対する減衰力の育腺性が悪
く、シかも温度変化による符性の変化が大きいという欠
点を有していた。そこで、本発明はこのような問題点を
解決するもので、その目的とするところは対物レンズ支
持装置の減衰力を速度及び温度変化に対、して安定させ
たうえで対物レンズの共振を抑制し、前記対物レンズの
制御性の向上をはかるものである。Another problem is that the damping force does not grow well with respect to the deformation of the cushioning material, and the sign of the damping force changes greatly due to temperature changes. The present invention is intended to solve these problems, and its purpose is to stabilize the damping force of the objective lens support device against speed and temperature changes, and to suppress the resonance of the objective lens. This is intended to improve the controllability of the objective lens.
本発明の光学的記録再生装置の対物レンズ支持装置は、
可動部に可動方向と平行な非磁性導体板を有し、かも前
記非磁性導体板の厚さ方向に磁束を通すことが可能な磁
気回路を固定部に構成したことを特徴とする。The objective lens support device of the optical recording and reproducing device of the present invention includes:
The movable part has a non-magnetic conductor plate parallel to the movable direction, and the fixed part has a magnetic circuit that can pass magnetic flux in the thickness direction of the non-magnetic conductor plate.
上記の様に構成された、光学的記録再生装置の対物レン
ズ支持装置の可動部を、電磁力などを用いて動かすこと
により、前記非磁性導体板には渦電流が生じ、前記非磁
性導体板の速度に応じた減衰力を固定部の磁界から受け
ることになる。その結果高次の共振が抑制され制御性が
向上する。By moving the movable part of the objective lens support device of the optical recording/reproducing apparatus configured as described above using electromagnetic force or the like, an eddy current is generated in the non-magnetic conductor plate. It receives a damping force from the magnetic field of the fixed part depending on the speed of the motor. As a result, higher-order resonance is suppressed and controllability is improved.
以下に９本ハ明の実施例を図面にもと、づいて説明する
。第１図において磁石６と外側継鉄５．後側継−鉄４．
内側継鉄９がシャーシ等に固定され、これらは固定部と
して磁気回路を構成する。磁石６と内側継鉄９との空隙
には第４図に示すように非磁性導体板３と前記非磁性導
体板３に固着されたトラッキングコイル７とフォーカシ
ングコイル８が磁気回路に非接触となるように支持され
る。前記非磁性導体板３は第５図に示すように非磁性導
体を７字形に切断した後、角パイプ状に成形したもので
非磁性導体とフォーカシング用板バネを兼ねる。非磁性
導体板３０未満は接続部材２を介してトラッキング用板
バネ１に固定され、さらに前記トラッキング用板バネ１
の他端は前記磁気回路と同様にシャーシ等に固定される
。非磁性導体板３の先端にはレンズホルダー１１が固着
され、さらにその内部には対物レンズ１０が固定されて
いる。A nine-piece embodiment will be described below with reference to the drawings. In FIG. 1, magnet 6 and outer yoke 5. Rear side joint - iron 4.
The inner yoke 9 is fixed to a chassis or the like, and these constitute a magnetic circuit as a fixed part. As shown in FIG. 4, in the gap between the magnet 6 and the inner yoke 9, a non-magnetic conductor plate 3 and a tracking coil 7 and a focusing coil 8 fixed to the non-magnetic conductor plate 3 are placed in a non-contact manner with the magnetic circuit. It is supported as follows. As shown in FIG. 5, the nonmagnetic conductor plate 3 is made by cutting a nonmagnetic conductor into a 7-shape and then forming it into a rectangular pipe shape, which serves both as a nonmagnetic conductor and as a focusing leaf spring. The non-magnetic conductor plate 30 is fixed to the tracking plate spring 1 via the connecting member 2, and further attached to the tracking plate spring 1.
The other end is fixed to the chassis etc. similarly to the magnetic circuit. A lens holder 11 is fixed to the tip of the non-magnetic conductor plate 3, and an objective lens 10 is further fixed inside the lens holder 11.
以上の様な構成においてトラッキングコイル７、および
フォーカシングコイル８に対物レンズ１０の駆動用の電
流を流すことにより磁気回路中の各コイルが力を受は対
物レンズ１０は、トラッキング用板バネ１と非磁性導体
板Ｓの７オ一カシング用板バネ部によって各バネの面と
垂直な方向にのみ駆動される。この際、非磁性導体板３
の磁気回路中にある部分には渦電流が発生し、対物レン
ズ１０の動きに対する抵抗力となる。この渦電流による
抵抗力は非磁性導体板３と磁石６の相対速度に比例し、
従って対物レンズの制御に有害な高次の共振が抑制され
、制御性が向上する。本実施例においては、製作コスト
の低減と軽量化を目的として非磁性導体板３はフォーカ
シング用板バネと一体としたが、これらは各々独立にす
ることも可能であり、その場谷各々の材質゛、板厚など
を変えることができ特性上の最適化設計が可能となる。In the above configuration, each coil in the magnetic circuit receives a force by passing a current for driving the objective lens 10 through the tracking coil 7 and the focusing coil 8. The magnetic conductor plate S is driven only in the direction perpendicular to the surface of each spring by the seven occasing leaf spring parts. At this time, the non-magnetic conductor plate 3
An eddy current is generated in a portion of the magnetic circuit, which acts as a resistance force against the movement of the objective lens 10. The resistance force due to this eddy current is proportional to the relative speed between the nonmagnetic conductor plate 3 and the magnet 6,
Therefore, high-order resonance harmful to control of the objective lens is suppressed, and controllability is improved. In this embodiment, the non-magnetic conductive plate 3 is integrated with the focusing leaf spring in order to reduce manufacturing costs and weight, but these can also be made independent, and the material can be changed depending on the situation.゛It is possible to change the plate thickness, etc., making it possible to design to optimize characteristics.
本発明はコンパクトディスク、ＯＤＲＯＭ、ビデオディ
スク、データファイル用ディスク等、光学的記録再生装
置に適用でき製品の安定性を大幅に向上することができ
る。The present invention can be applied to optical recording and reproducing devices such as compact discs, ODROMs, video discs, and data file discs, and can greatly improve product stability.
本発明は、以上説明したように、対物レンズを移動可能
に支持する装置において可動部の非磁性導体板に発生す
る渦電流により、速度に対する直線性及び温度変化に対
する安定性に良好な抵抗力を発生させ、一対物レンズの
制御を容易に、かつ安定にする効果がある。As explained above, the present invention provides good resistance to linearity with respect to speed and stability with respect to temperature changes by means of eddy currents generated in the non-magnetic conductive plate of the movable part in a device that movably supports an objective lens. This has the effect of making the control of one objective lens easier and more stable.
第１図は本発明にかかる対物レンズ支持装置の斜視図、
第２図は従来の対物レンズ支持装置の断面図、第５図は
従来の対物レンズ支持装置に使用されている板バネの断
面図、第４図は本発明にかかる磁気回路の部分断面図、
第５図はこの発明の非磁性導体板形状の実施例を示す斜
視図である。
１・・・・・・トラッキング用板バネ
２・・・・・・接続部材
３・・・・・・非磁性導体板
４・・・・・・・・・後側継鉄
５・・・・・・・・・外側継鉄
６・・・・・・・・・磁 石
７・・・・・・・・・トラッキングコイル８・・・・・
・・・・フォーカシングコイル９・・・・・・・・・内
側継鉄
１０４、・・・・・・対物レンズ
１１：・・・・・レンズホルダー
１２・・・・・・鏡 枠
１３・・・・・・制御用ばね
１４・・・・・・粘性材層
１５・・・・・・板ばね
１６・・・・・・シリコン樹脂層
以上FIG. 1 is a perspective view of an objective lens support device according to the present invention;
FIG. 2 is a sectional view of a conventional objective lens support device, FIG. 5 is a sectional view of a leaf spring used in the conventional objective lens support device, and FIG. 4 is a partial sectional view of a magnetic circuit according to the present invention.
FIG. 5 is a perspective view showing an embodiment of the nonmagnetic conductor plate shape of the present invention. 1... Tracking leaf spring 2... Connection member 3... Non-magnetic conductor plate 4... Rear yoke 5... ...Outer yoke 6 ... Magnet 7 ... Tracking coil 8 ...
...Focusing coil 9...Inner yoke 104, ...Objective lens 11: ...Lens holder 12...Mirror frame 13... ... Control spring 14 ... Viscous material layer 15 ... Leaf spring 16 ... Silicone resin layer or higher
Claims (1)
生、消去する為の対物レンズを移動可能に支持する装置
において、可動部に可動方向と平行な非磁性導体板を有
し、かつ前記非磁性導体板の厚さ方向に磁束を通すこと
が可能な磁気回路を固定部に構成したことを特徴とする
、光学的記録再生装置の対物レンズ支持装置。(1) In a device that movably supports an objective lens for recording, reproducing, and erasing information on a recording medium using optical means, the movable part has a nonmagnetic conductive plate parallel to the movable direction, An objective lens support device for an optical recording/reproducing device, characterized in that a magnetic circuit capable of passing a magnetic flux in the thickness direction of the non-magnetic conductive plate is configured in a fixed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20834986A JPS6364638A (en) | 1986-09-04 | 1986-09-04 | Objective lens supporting device for optical recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20834986A JPS6364638A (en) | 1986-09-04 | 1986-09-04 | Objective lens supporting device for optical recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6364638A true JPS6364638A (en) | 1988-03-23 |
Family
ID=16554806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20834986A Pending JPS6364638A (en) | 1986-09-04 | 1986-09-04 | Objective lens supporting device for optical recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6364638A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5164936A (en) * | 1990-05-29 | 1992-11-17 | Alps Electric Co., Ltd. | Optical pickup system with vibration protection |
| US5232755A (en) * | 1990-09-14 | 1993-08-03 | Toppan Printing Co., Ltd. | Laminated tube container |
| US5314561A (en) * | 1990-09-14 | 1994-05-24 | Toppan Printing Co., Ltd. | Method of preparing laminated packaging material |
| US5903539A (en) * | 1996-06-18 | 1999-05-11 | Asahi Kogaku Kogyo Kabushiki Kaisha | Electromagnetic objective lens driving apparatus of optical data recording and reproducing apparatus |
-
1986
- 1986-09-04 JP JP20834986A patent/JPS6364638A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5164936A (en) * | 1990-05-29 | 1992-11-17 | Alps Electric Co., Ltd. | Optical pickup system with vibration protection |
| US5232755A (en) * | 1990-09-14 | 1993-08-03 | Toppan Printing Co., Ltd. | Laminated tube container |
| US5314561A (en) * | 1990-09-14 | 1994-05-24 | Toppan Printing Co., Ltd. | Method of preparing laminated packaging material |
| US5612106A (en) * | 1990-09-14 | 1997-03-18 | Toppan Printing Co, Ltd. | Laminated tube container |
| DE4130538C2 (en) * | 1990-09-14 | 2002-09-26 | Toppan Printing Co Ltd | Multi-layer tubular body container |
| US5903539A (en) * | 1996-06-18 | 1999-05-11 | Asahi Kogaku Kogyo Kabushiki Kaisha | Electromagnetic objective lens driving apparatus of optical data recording and reproducing apparatus |
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