JPH026137B2 - - Google Patents
Info
- Publication number
- JPH026137B2 JPH026137B2 JP16170881A JP16170881A JPH026137B2 JP H026137 B2 JPH026137 B2 JP H026137B2 JP 16170881 A JP16170881 A JP 16170881A JP 16170881 A JP16170881 A JP 16170881A JP H026137 B2 JPH026137 B2 JP H026137B2
- Authority
- JP
- Japan
- Prior art keywords
- focusing
- tracking
- fixed
- magnet
- block
- 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
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000004804 winding Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000004065 semiconductor Substances 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
- Optical Recording Or Reproduction (AREA)
Description
【発明の詳細な説明】
本発明は、小型で然も生産性に優れた光学式デ
イスクプレーヤのレンズ駆動機構に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens drive mechanism for an optical disk player that is compact and has excellent productivity.
光学式デイスクプレーヤは、PCMコンパクト
デイスクプレーヤ等の開発によつて、より小型の
光学系を必要としており、光源に半導体レーザを
採用すると共にトラツキングミラーを解消した光
学系が開発されている。斯る光学系は、対物レン
ズを光軸を含む面に関して２次元的に変位自在に
支持すると共にその変位量を制御信号によつてコ
ントロールするものであり、支持機構と駆動機構
はその構成を複雑にすると共に組立作業をも繁雑
にしていた。 With the development of PCM compact disk players and the like, optical disc players require smaller optical systems, and optical systems that employ semiconductor lasers as light sources and eliminate tracking mirrors have been developed. Such an optical system supports the objective lens so that it can be displaced two-dimensionally with respect to a plane that includes the optical axis, and the amount of displacement is controlled by a control signal, and the structure of the support mechanism and drive mechanism is complicated. This also made assembly work more complicated.
そこで本発明では、上述する点に鑑み、コイル
巻線を施した２種類の磁性板をブロツクの同一面
に固定してレンズ支持機構に対向固定する簡単な
組立構成を採用した小型のレンズ支持駆動機構組
立体を提案せんとするものである。 Therefore, in view of the above-mentioned points, the present invention has developed a compact lens support drive that employs a simple assembly structure in which two types of magnetic plates with coil windings are fixed on the same surface of the block and fixed oppositely to the lens support mechanism. This paper aims to propose a mechanism assembly.
以下、まず本発明の駆動原理に付いて第１図の
原理図に従い説明する。第１図は、磁石Ｍの磁極
面（Ｎ極）にコイル巻線を施した磁性板Ｐの板面
を対向せしめた状態を示す断面図を示す。図示す
る様にＮ極より出る磁束の多くは磁性板Ｐ内でそ
の方向を変更されて板面に沿つて外方に向いその
端辺よりＳ極に向つており、僅かな磁束が磁性板
Ｐを貫く。従つて磁極側コイルの電流のみが力を
受け図示する電流方向の場合、磁性板Ｐは図の右
方F0への力を受け、その抗力が磁石Ｍを左方F1
へ駆動する。よつて磁石Ｍはコイルの電流に応じ
て磁性板Ｐの長手方向に沿つて変位せしめられ
る。本発明はこの駆動原理を利用してトラツキン
グ制御とフオーカシング制御を為すものである。
第２図は本発明の一実施例の一部分解斜視図を示
す。本実施例は図示する様に、支持体１の左右両
側面に２枚のトラツキング用弾性板２ａ，２ｂの
一端を接着固定して板面を平行に対向せしめ、該
トラツキング用弾性板２ａ，２ｂの他端に略直方
体状の中間ブロツク３を接着固定して該中間ブロ
ツク３を左右（トラツキング方向）に変位可能に
支持している。更にこの中間ブロツク３の上面と
下面には２枚のトラツキング用弾性板４ａ，４ｂ
の一端を接着固定しており、このトラツキング用
弾性板４ａ，４ｂの他端にはレンズ支持ブロツク
５を接着固定して該レンズ支持ブロツク５を上下
方向にも変位可能に支持している。前記レンズ支
持ブロツク５には光通過用透孔（図示省略）が形
成されその透孔上に対物レンズ（図示省略）を内
挿したレンズ筒体６が固定されており、該透孔の
前後両側には磁極を前後面に形成する一対のフオ
ーカシング用磁石７，７が固定され、前記レンズ
支持ブロツク５の右端には前後面に磁極を形成す
るトラツキング用磁石８が固定されている。本実
施例はこの様なレンズ支持機構を接着組立してい
る。 Hereinafter, first, the driving principle of the present invention will be explained according to the principle diagram shown in FIG. FIG. 1 is a sectional view showing a state in which the surface of a magnetic plate P on which a coil winding is applied is opposed to the magnetic pole surface (N pole) of a magnet M. As shown in the figure, most of the magnetic flux emitted from the N pole is changed in direction within the magnetic plate P, facing outward along the plate surface, and is directed toward the S pole from the edge, and a small amount of magnetic flux is directed to the S pole from the edge of the magnetic plate P. Penetrate. Therefore, when only the current in the magnetic pole side coil receives a force and the current direction is as shown, the magnetic plate P receives a force in the right direction F 0 in the figure, and the drag forces the magnet M in the left direction F 1
drive to. Therefore, the magnet M is displaced along the longitudinal direction of the magnetic plate P according to the current in the coil. The present invention utilizes this driving principle to perform tracking control and focusing control.
FIG. 2 shows a partially exploded perspective view of an embodiment of the invention. In this embodiment, as shown in the figure, one ends of two tracking elastic plates 2a, 2b are adhesively fixed to both left and right side surfaces of a support body 1, so that the plate surfaces are parallel to each other, and the tracking elastic plates 2a, 2b are made to face each other in parallel. A substantially rectangular parallelepiped-shaped intermediate block 3 is adhesively fixed to the other end to support the intermediate block 3 so as to be movable left and right (tracking direction). Furthermore, two elastic plates 4a and 4b for tracking are provided on the upper and lower surfaces of the intermediate block 3.
One end is fixed with adhesive, and a lens support block 5 is fixed with adhesive on the other end of the tracking elastic plates 4a, 4b, and the lens support block 5 is supported so as to be movable in the vertical direction. A light passage hole (not shown) is formed in the lens support block 5, and a lens barrel 6 in which an objective lens (not shown) is inserted is fixed onto the hole. A pair of focusing magnets 7, 7 having magnetic poles formed on the front and rear surfaces are fixed to the lens supporting block 5, and a tracking magnet 8 having magnetic poles formed on the front and rear surfaces is fixed to the right end of the lens support block 5. In this embodiment, such a lens support mechanism is assembled by adhesive.
本実施例は、このレンズ支持体を駆動する駆動
機構の配列を特徴とする。即ち、本実施例は、フ
オーカシング用磁石とトラツキング磁石の着磁方
向を対物レンズの変位方向と直交する方向とし、
固定ブロツクの同一面に磁性板を固定可能にして
いる。そこで、本実施例の駆動機構は一対の固定
ブロツク９ａ，９ｂを磁極に対向固定する前にそ
れぞれの対向面にコイル巻線を施したフオーカシ
ング用磁性板１０ａ，１０ｂとトラツキング用磁
性板１１ａ，１１ｂを接着固定しており、前記フ
オーカシング用磁性板１０ａ，１０ｂに巻回せし
めたフオーカシング用コイル巻線Cf，Cfはトラツ
キング方向にフオーカシング制御電流を流す様に
前記フオーカシング用磁性板１０ａ，１０ｂを直
立しせしめて接着せしめており、前記トラツキン
グ用磁性板１１ａ，１１ｂに巻回せしめたトラツ
キング用コイル巻線Ct，Ctはフオーカシング方向
に制御電流を流す様に前記トラツキング用磁性板
１１ａ，１１ｂを横向きに接着固定しており、両
磁性板が接着固定された後に固定ブロツク９ａ，
９ｂを磁極面に対向固定せしめるだけで組立は完
了する。従つて、本発明によれば、互いの面が直
交する２対の弾性板にてレンズ支持ブロツクを支
持してレンズ支持機構を構成し、フオーカシング
方向とトラツキング方向とは直交する方向を着磁
方向とする２種類の磁石をレンズ支持ブロツクに
固定すると共に、磁極対向面にコイル巻回方向を
異にする２種類の磁性板を対向せしめてレンズ駆
動機構を構成するため、簡単な構成でレンズの支
持と駆動が可能になり組立も容易となりその効果
は大である。 This embodiment is characterized by the arrangement of drive mechanisms that drive this lens support. That is, in this embodiment, the direction of magnetization of the focusing magnet and the tracking magnet is perpendicular to the direction of displacement of the objective lens,
The magnetic plate can be fixed on the same surface of the fixed block. Therefore, in the drive mechanism of this embodiment, a pair of fixing blocks 9a and 9b are formed by coil windings on their opposing surfaces before they are fixed oppositely to the magnetic poles, focusing magnetic plates 10a and 10b and tracking magnetic plates 11a and 11b. The focusing coil windings C f and C f wound around the focusing magnetic plates 10 a and 10 b connect the focusing magnetic plates 10 a and 10 b so that a focusing control current flows in the tracking direction. The tracking coil windings C t and C t wound around the tracking magnetic plates 11a and 11b are placed upright and bonded together, and the tracking coil windings C t and C t are wound around the tracking magnetic plates 11a and 11b so that a control current flows in the focusing direction. is glued and fixed horizontally, and after both magnetic plates are glued and fixed, the fixing block 9a,
Assembly is completed by simply fixing 9b facing the magnetic pole surface. Therefore, according to the present invention, the lens support block is supported by two pairs of elastic plates whose surfaces are orthogonal to each other to constitute the lens support mechanism, and the focusing direction and the tracking direction are orthogonal to each other as the magnetization direction. The lens drive mechanism is constructed by fixing two types of magnets to the lens support block and opposing two types of magnetic plates with different coil winding directions on the opposite sides of the magnetic poles. It is possible to support and drive it, and it is easy to assemble, which has great effects.
第１図は本発明の駆動原理説明図、第２図は本
発明の一実施例機構の一部分解斜視図をそれぞれ
示す。
主な図番の説明 ２ａ，２ｂ……トラツキング
用弾性板、３……中間ブロツク、４ａ，４ｂ……
フオーカシング用弾性板、５……レンズ支持ブロ
ツク、７ａ，７ｂ……フオーカシング用磁石、８
……トラツキング用磁石、１０ａ，１０ｂ……フ
オーカシング用磁性板、１１ａ，１１ｂ……トラ
ツキング用磁性板。
FIG. 1 is a diagram illustrating the driving principle of the present invention, and FIG. 2 is a partially exploded perspective view of a mechanism according to an embodiment of the present invention. Explanation of main drawing numbers 2a, 2b...Elastic plate for tracking, 3...Intermediate block, 4a, 4b...
Focusing elastic plate, 5... Lens support block, 7a, 7b... Focusing magnet, 8
...Tracking magnet, 10a, 10b...Magnetic plate for focusing, 11a, 11b...Magnetic plate for tracking.
Claims (1)
直交する面を形成するトラツキング用弾性板と、
該トラツキング用弾性板の他端に固定される中間
ブロツクと、該中間ブロツクに一端を固定されフ
オーカシング方向と直交する面を形成するフオー
カシング用弾性板と、該フオーカシング用弾性板
の他端に固定され対物レンズを固定するレンズ支
持ブロツクと、該レンズ支持ブロツクに固定され
フオーカシング方向及びトラツキング方向に直交
する方向に磁極面を形成するフオーカシング用磁
石並びにトラツキング用磁石と、前記レンズ支持
ブロツクに対向してフオーカシング方向及びトラ
ツキング方向に平行な対向面を有する固定ブロツ
クと、前記フオーカシング用磁石に対向しトラツ
キング方向にフオーカシング用コイル巻線を施さ
れて前記対向面に固定されたフオーカシング用磁
性板と、前記トラツキング用磁石に対向しフオー
カシング方向にトラツキング用コイル巻線を施さ
れて前記対向面に固着されたトラツキング用磁性
板とを、それぞれ配して成る光学式デイスクプレ
ーヤのレンズ支持駆動機構組立体。1. An elastic plate for tracking that has one end fixed to a support and forms a surface perpendicular to the tracking direction;
an intermediate block fixed to the other end of the tracking elastic plate; a focusing elastic plate having one end fixed to the intermediate block and forming a surface perpendicular to the focusing direction; and a focusing elastic plate fixed to the other end of the focusing elastic plate. A lens support block that fixes an objective lens; a focusing magnet and a tracking magnet that are fixed to the lens support block and form magnetic pole surfaces in a direction perpendicular to the focusing direction and the tracking direction; and a focusing magnet that faces the lens support block. a fixed block having opposing surfaces parallel to the tracking direction and the tracking direction; a focusing magnetic plate facing the focusing magnet and having a focusing coil wound in the tracking direction and fixed to the opposing surface; A lens support drive mechanism assembly for an optical disc player, comprising a tracking magnetic plate facing a magnet and having a tracking coil wound in the focusing direction and fixed to the opposing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16170881A JPS5862836A (en) | 1981-10-08 | 1981-10-08 | Lens supporting and driving mechanism assembly of optical disk player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16170881A JPS5862836A (en) | 1981-10-08 | 1981-10-08 | Lens supporting and driving mechanism assembly of optical disk player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5862836A JPS5862836A (en) | 1983-04-14 |
| JPH026137B2 true JPH026137B2 (en) | 1990-02-07 |
Family
ID=15740362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16170881A Granted JPS5862836A (en) | 1981-10-08 | 1981-10-08 | Lens supporting and driving mechanism assembly of optical disk player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5862836A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0528536U (en) * | 1991-09-30 | 1993-04-16 | 株式会社クボタ | Powder and granular material feeder |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4720088A (en) * | 1983-05-18 | 1988-01-19 | Canon Kabushiki Kaisha | Optical system supporting device |
| NL8304141A (en) * | 1983-12-01 | 1985-07-01 | Philips Nv | ELECTRO-OPTICAL DEVICE FOR ELECTRO-DYNAMIC CONTROL OF THE POSITION OF A RADIANT SPOT. |
| DE3574302D1 (en) * | 1984-10-02 | 1989-12-21 | Toshiba Kk | Optical head apparatus for recording and reproducing data on a recording medium |
-
1981
- 1981-10-08 JP JP16170881A patent/JPS5862836A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0528536U (en) * | 1991-09-30 | 1993-04-16 | 株式会社クボタ | Powder and granular material feeder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5862836A (en) | 1983-04-14 |
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