JPS5860435A - Objective supporting and driving mechanism of optical disk player - Google Patents
Objective supporting and driving mechanism of optical disk playerInfo
- Publication number
- JPS5860435A JPS5860435A JP15893781A JP15893781A JPS5860435A JP S5860435 A JPS5860435 A JP S5860435A JP 15893781 A JP15893781 A JP 15893781A JP 15893781 A JP15893781 A JP 15893781A JP S5860435 A JPS5860435 A JP S5860435A
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- magnet
- elastic plates
- lens
- 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.)
- 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
-
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、構成を簡単にした光学式ディスクプレーヤの
対物レンズ支持駆動機構に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an objective lens support and drive mechanism for an optical disc player that has a simple configuration.
最近の光学式ディスクプレーヤは、光学系のコンパクト
化のため、光源に半導体レーザを採用し、対物レンズを
光軸と直交する方向に変位せしめてトランキング制卸を
可能にしている。しかしこのＳな光学系は、通常スピー
カの振動ノホ理な利用して対物レンズの支持とフォーカ
ス制御を為すと共に対物レンズ支持体を光軸とは直交す
るトラッキング方向に変位せしめてお９、構成に特別の
工夫を必要とするために機構が複雑になるばかシか組立
も繁雑となりた。そこで１本発明は、対物レンズの支持
と駆動を簡単な構成によりて実現Ｔると共に組立をも容
易にした新規且つ有効な対物レンズの支持駆動機構を提
案するものである。In order to make the optical system more compact, recent optical disc players employ a semiconductor laser as a light source and displace the objective lens in a direction perpendicular to the optical axis to enable trunking control. However, this S-type optical system usually utilizes the vibrations of the speaker to support the objective lens and control the focus, and also displaces the objective lens support in the tracking direction perpendicular to the optical axis9. Because it required special ingenuity, the mechanism became complicated, and assembly was also complicated. Accordingly, one object of the present invention is to propose a new and effective objective lens support and drive mechanism that realizes support and drive of the objective lens with a simple structure and is also easy to assemble.
以下１本発明を図示せる一実施例に従い説１］する。第
１図は本実施例機構の駆動原理を模式的に示す断面図で
あり、磁石（ＭＪが形成する磁束を横切２て配された磁
性板（Ｐ） Ｋコイル巻線（Ｃ）を施した状態を断面し
て示′「ものである。磁性板（ＰＪの配設によりて多く
の磁束は図示する株にＮ極より前記磁性板（Ｐ）を通っ
て該磁性板（１’）の両側より１１１でＳ極に至る磁路
を形成し、前記磁性＆（Ｐ）を貫く磁束は少ない。従り
て磁束に影響されて連１ＩＡＩＩＴるのは磁石と対向す
る仰］のコイル（Ｃ）のみであシ１図中削削記イル（Ｃ
）は右方への力を受けることになシ逆に前記磁石（Ｍ丹
ま左方への力を受けることになる。よって。The present invention will be explained below according to an embodiment illustrating the present invention. FIG. 1 is a sectional view schematically showing the driving principle of the mechanism of this embodiment, in which a magnetic plate (P) placed across the magnetic flux formed by the magnet (MJ) and a K coil winding (C) are installed. This is shown in cross section. Due to the arrangement of the magnetic plate (PJ), much of the magnetic flux passes from the N pole of the magnetic plate (P) through the magnetic plate (P) shown in the figure. A magnetic path is formed from both sides to the S pole at 111, and the magnetic flux penetrating the magnetic & (P) is small.Therefore, the coil (C) that is influenced by the magnetic flux and moves in the opposite direction to the magnet. Only one drawing is removed (C
) will receive a force to the right, but on the contrary, the magnet (M) will receive a force to the left.Thus.
コイル形成面に磁石の磁極を対向せしめてもコイルを断
面する方向に力？発生Ｔることができる。Even if the magnetic poles of the magnet are opposed to the coil formation surface, is there still a force in the direction that crosses the coil? It can occur.
本実施例はこの原理を利用して対物レンズを駆動せしめ
るものである。This embodiment utilizes this principle to drive the objective lens.
第２図は本実施例の支持機構を断面して示すものでるり
、指体を形成する支持体（１１右側板に対し支持体（１
）の底面と平行に２枚の第１弾曲板（２す（２ｂ）を固
定し、該第１弾性板（２ｍ） （２りの自由端にてＬ字
状の中間支持プロツ幻３ｊの一辺（６りを挟持固定し、
該中間支持ブロック（３）の他辺（！１り上に平行な２
枚の第２弾性板（４す（４りを直立固定し、該第２弾性
板（４ａ） （４ｂ） の自由端にて対物レンズ（５）
を配するレンズ支持ブロック（６）を挟持固定している
。従って１記中間支持ブロック（３）を上下に変位せし
めれば前記第１弾性板（２ａ）（２りのたわみによって
ｌ１ＴＪ記対物レンズ（５）がフォー力シングカ向に質
位し、前記レンズ支持ブロック（６）を左右に変位せし
めればｍＪ記第２弾性板（４ｍ）（４ｂ）のたわみによ
って前記対物レンズ（５）がトラッキング方向に変位す
ることになり、簡単な構成により対物レンズ（５）を上
下左右に狭位自在に支持することができる。同図中支持
体（１）、中間支持ブロック（３Ｊ及びレンズ支持ブロ
ック（６）には光通過用の透孔（１ａ）（５０）（６り
が穿設されており。Figure 2 is a cross-sectional view of the support mechanism of this embodiment.
), and fix two first elastic plates (2b) parallel to the bottom of the L-shaped intermediate support plate 3j at the free ends of the first elastic plates (2m). One side (6 sides) is clamped and fixed,
The other side of the intermediate support block (3) (2 parallel to
The second elastic plates (4) are fixed upright, and the objective lens (5) is attached to the free end of the second elastic plates (4a) (4b).
A lens support block (6) on which the lens is placed is clamped and fixed. Therefore, when the first intermediate support block (3) is vertically displaced, the first elastic plate (2a) (2a) deflects, and the objective lens (5) moves toward the force force, and the lens support If the block (6) is displaced from side to side, the objective lens (5) will be displaced in the tracking direction due to the deflection of the second elastic plates (4m) (4b). ) can be supported vertically and horizontally in a narrow manner.In the figure, the support body (1), the intermediate support block (3J), and the lens support block (6) have through holes (1a) (50) for light passage. (6 holes are drilled.
レンズ支持ブロック（６）の透孔（６ｍ）には対物レン
ズが嵌め込まれている（但し第２図は分解して図示しで
ある）。An objective lens is fitted into the through hole (6m) of the lens support block (6) (however, FIG. 2 shows the lens in an exploded view).
本実施例は、第２図に図示する支持機構ｌζ第１図に原
理的に図示した駆動ａｌｌ構を採用するものでｆ５シ、
第６図の平面図ｊＲ；４図の縦断面図に図ボする様に、
前記中間支持ブロック（３Ｊの一辺（６つの背面に第１
磁石（７）を固定しＡｉＪ後方向に磁束を形成し、１ｒ
ｉＪ記レンズ支持ブロック＋６１１７１１前後にも一対
の第２磁石（８ｍ） （８ｂ）を固定して前後方向に磁
束を形成しておシ、磁束は何れも対物レンズ（５）の変
位とは直交する方向に形成さね、る。本実施例は。This embodiment adopts the support mechanism lζ shown in FIG. 2 and the drive all structure shown in principle in FIG.
Plan view jR in Figure 6; As shown in the vertical cross-sectional view in Figure 4,
One side of the intermediate support block (3J)
Fix the magnet (7) and form a magnetic flux in the rear direction of AiJ, 1r
A pair of second magnets (8m) (8b) are fixed to the front and rear of the iJ lens support block +611711 to form a magnetic flux in the front and back direction, and both magnetic fluxes are orthogonal to the displacement of the objective lens (5). It forms in the direction. This example is.
前記第１磁石（７）？挾んで対＋ｉ’ｊｌ Ｔる位置に
コイル巻線を施した第１磁性板（９す（９ｂ）を配して
おり。Said first magnet (7)? A first magnetic plate (9b) with a coil winding is placed between the two.
該第１磁性板（９ａ） （９りのコイル巻線（０１）（
Ｃ麿）は横方向（即ちトラッキング方向）に形成されて
おり、一方のコイル面を前記支持体（１１の前後向に接
着固定している。更に本実施例は前記第２磁石（８Ｍ）
（８ｂ）にも同様に第２磁性板（１０す（１０ｂ）を
対向せしめており、コイル巻線（ＯＪ（ｅりは上下方向
（即ちフォーカシング方向）に施されて前記支持体（１
１の前後面に接着固定されている。The first magnetic plate (9a) (9 coil windings (01) (
The second magnet (8M) is formed in the horizontal direction (that is, the tracking direction), and one coil surface is adhesively fixed in the front and back direction of the support (11).
Similarly, a second magnetic plate (10b) is also opposed to the second magnetic plate (10b), and a coil winding (OJ
It is adhesively fixed to the front and rear surfaces of 1.
従ってトラッキング制御信号な第２磁性板（１０す（ｉ
ｏｂ）のコイルに印加すれば対物レンズ（５）が左右に
動いてトラッキングが為され、フォーカシング制御信号
を第２磁性板（１０す（１０りのコイルに印加すれば対
物レンズが上下に動いてフォーカス制卸が為される。第
５図は対物レンズの変位を模式的に示したものであシ、
図の△ｄは前記第１弾性板（２ｍ）（２ｂ）のたわみに
よって生ずるフォーカシング方向の変位置であり、△ｌ
は第２弾性板（４ｍ）（４ｂ）のたわみによって生ずる
トラッキング方向の変位ｌである。Therefore, the tracking control signal is the second magnetic plate (10s(i)
When the focusing control signal is applied to the coil of the second magnetic plate (10), the objective lens (5) moves left and right to perform tracking, and when the focusing control signal is applied to the coil of the second magnetic plate (10), the objective lens moves up and down. Focus control is performed. Figure 5 schematically shows the displacement of the objective lens.
△d in the figure is the displacement position in the focusing direction caused by the deflection of the first elastic plates (2m) (2b), and △l
is the displacement l in the tracking direction caused by the deflection of the second elastic plates (4m) (4b).
本発明によれば、対物レンズの変位方向と平行に磁性板
を配して磁石との間隔を一定に保つているため、制御信
号のレベル変動に対し対物レンズを直線的に変位せしめ
ることができる。面木発明に於て中間支持ブロックとレ
ンズ支持ブロックの両方を変位せしめてフォーカシング
制御を為しレンズ支持ブロックのみを変位せしめてトラ
ツキングを為す理由は、オデイオ用のコンパクトディス
クブレヤーがビデオディスクプレーヤに比しディスクの
面振れが少なくトラッキング制御を優先するためである
。According to the present invention, since the magnetic plate is arranged parallel to the direction of displacement of the objective lens and the distance from the magnet is kept constant, the objective lens can be displaced linearly in response to level fluctuations of the control signal. . In the Mengi invention, focusing control is performed by displacing both the intermediate support block and the lens support block, and tracking is performed by displacing only the lens support block. This is because there is less surface runout of the disk and priority is given to tracking control.
図は何れも不発り］の一実施例を示し、第１図は本実施
例の駆動原理説１月図、第２図は本実施例の支持機構の
一部切欠斜視図、第３図は本実施例機構の平面図、第４
図は本実施例８１横の縦断面図、第５図は本実施例機構
の変位状態を示す縦断１０１図をそれぞれ顕わす。
土な図番の説明
ｆｌｌ−・・支持体、 （２Ｍ）（２ｂ）−’ｆｆｉ
１弾性板、ｔ３７・・・中間支持ブロック、 （４
ｍ）（４ｂ）・・・第２弾性板。
（６）・・・レンズ支持ブロック、１７）・・・第１磁
石、（８畠）（８ｂ）−・・第２磁石、（９ａ） （９
ｂ） ・ｆｆｉ １１ｉ！性板。
（１０Ｂ）（１０ｂ）−％２１ｉｆｌ性板。
第１図
中ＦＯFig. 1 is a diagram of the drive principle of this embodiment, Fig. 2 is a partially cutaway perspective view of the support mechanism of this embodiment, and Fig. 3 is a partially cutaway perspective view of the support mechanism of this embodiment. Plan view of the mechanism of this embodiment, No. 4
The figure shows a lateral vertical sectional view of the embodiment 81, and FIG. 5 shows a longitudinal sectional view 101 showing the displacement state of the mechanism of this embodiment. Explanation of the earth figure number full-...Support, (2M) (2b)-'ffi
1 elastic plate, t37... intermediate support block, (4
m) (4b)...Second elastic plate. (6)... Lens support block, 17)... First magnet, (8ha) (8b) -... Second magnet, (9a) (9
b) ・ffi 11i! Sex plate. (10B) (10b)-%21ifl sex plate. FO in Figure 1
Claims (1)
交する面を形成する一対の第１弾性板と、該第１弾性板
の他端に一辺を挾持され他辺に光通過用の透孔を穿設し
て成る略り字状の中間支持グロックと、該中間支持ブロ
ックの他辺に一端を固デ 定されトラッキング方向に直交する面？形成する一対の
第２弾性板と％該第２弾性板の他端に映持さ九内方に対
物レンズを支持するレンズ支持ブロックと、＠配回動ブ
ロックの一辺背面に固定され磁束をフォーカシング及び
トラッキング方向と直交する方向に形成する第１磁石と
、トラッキング方向にコイル巻線を施さｔｉ削記第１磁
石の磁束に直りして前記支持体に固定される一対の第１
磁性板と、前記レンズ支持ブロックに固定され磁束をフ
ォーカシング及びトラッキング方向と直交する方向に磁
束を形成する第２磁石と、フォーカシング方向にコイル
巻線を施され前記第２磁石の磁束に直交して前記支持体
に固定さね、る一対の第２磁性板とをそれぞｎ、配しｓ
ＭｊＪ記中間ブロックをフォーカシング方向に変位せ
しめると共に＠記しンズ支持ブロックをトラッキング方
向に変位せしめることを特徴とする光学式ディスクプレ
ーヤの対物レンズ支持駆動機構。(1) A pair of first elastic plates having one end fixed to a support body and forming a surface perpendicular to the focusing direction, and one side of the first elastic plates being held at the other end and having a through hole for light passage on the other side. An abbreviated intermediate support glock formed by drilling, and a surface perpendicular to the tracking direction with one end fixed to the other side of the intermediate support block? A pair of second elastic plates are formed, a lens support block that supports the objective lens inwardly is held at the other end of the second elastic plate, and a lens support block is fixed to the rear side of one side of the rotating block to focus the magnetic flux. and a first magnet formed in a direction perpendicular to the tracking direction, and a pair of first magnets each having a coil winding in the tracking direction and fixed to the support body by the magnetic flux of the first magnet.
a magnetic plate, a second magnet fixed to the lens support block and forming a magnetic flux in a direction perpendicular to the focusing and tracking directions; and a second magnet having a coil wound in the focusing direction and perpendicular to the magnetic flux of the second magnet. and a pair of second magnetic plates fixed to the support body, respectively.
An objective lens support and drive mechanism for an optical disc player, characterized in that it displaces an intermediate block in a focusing direction and also displaces a lens support block in a tracking direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15893781A JPS5860435A (en) | 1981-10-05 | 1981-10-05 | Objective supporting and driving mechanism of optical disk player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15893781A JPS5860435A (en) | 1981-10-05 | 1981-10-05 | Objective supporting and driving mechanism of optical disk player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5860435A true JPS5860435A (en) | 1983-04-09 |
| JPH026136B2 JPH026136B2 (en) | 1990-02-07 |
Family
ID=15682596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15893781A Granted JPS5860435A (en) | 1981-10-05 | 1981-10-05 | Objective supporting and driving mechanism of optical disk player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5860435A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0092997A2 (en) * | 1982-04-23 | 1983-11-02 | Kabushiki Kaisha Toshiba | An optical pickup |
-
1981
- 1981-10-05 JP JP15893781A patent/JPS5860435A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0092997A2 (en) * | 1982-04-23 | 1983-11-02 | Kabushiki Kaisha Toshiba | An optical pickup |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH026136B2 (en) | 1990-02-07 |
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