JPH026136B2 - - Google Patents
Info
- Publication number
- JPH026136B2 JPH026136B2 JP15893781A JP15893781A JPH026136B2 JP H026136 B2 JPH026136 B2 JP H026136B2 JP 15893781 A JP15893781 A JP 15893781A JP 15893781 A JP15893781 A JP 15893781A JP H026136 B2 JPH026136 B2 JP H026136B2
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- focusing
- support block
- tracking
- magnetic
- 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
- 230000004907 flux Effects 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000010586 diagram Methods 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
-
- 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)
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イスクプ
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 disk player that has a simple configuration.
最近の光学式デイスクプレーヤは、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
めてトラツキング制御を可能にしている。しかし
この様な光学系は、通常スピーカの振動原理を利
用して対物レンズの支持とフオーカス制御を為す
と共に対物レンズ支持体を光軸とは直交するトラ
ツキング方向に変位せしめており、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り
か組立も繁雑となつた。そこで、本発明は、対物
レンズの支持と駆動を簡単な構成によつて実現す
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 disk players employ a semiconductor laser as a light source, and enable tracking control by displacing the objective lens in a direction perpendicular to the optical axis. However, such optical systems usually use the principle of vibration of the speaker to support the objective lens and control the focus, while also displacing the objective lens support in the tracking direction perpendicular to the optical axis. Not only did the mechanism become complicated because it required ingenuity, but it also became complicated to assemble. Therefore, the present invention proposes 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、本発明を図示せる一実施例に従い説明す
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Ｍが形成する磁束を断切
つて配された磁性板Ｐにコイル巻線Ｃを施した状
態を断面して示すものである。磁性板Ｐの配設に
よつて多くの磁束は図示する様にＮ極より前記磁
性板Ｐを通つて該磁性板Ｐの両側より出てＳ極に
至る磁路を形成し、前記磁性板Ｐを貫く磁束は少
ない。従つて磁束に影響されて運動するのは磁石
と対向する側のコイルC′のみであり、図中前記コ
イルＣは右方への力を受けることになり逆に前記
磁石Ｍは左方への力を受けることになる。よつ
て、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を発生することができ
る。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。 Hereinafter, the present invention will be explained according to an illustrative embodiment. FIG. 1 is a cross-sectional view schematically showing the driving principle of the mechanism of this embodiment, and shows a cross-sectional view of a coil winding C applied to a magnetic plate P arranged to cut off the magnetic flux formed by a magnet M. It is something. Due to the arrangement of the magnetic plate P, a large amount of magnetic flux forms a magnetic path from the north pole, passes through the magnetic plate P, exits from both sides of the magnetic plate P, and reaches the south pole, as shown in the figure. The magnetic flux that penetrates is small. Therefore, only the coil C' on the side facing the magnet moves under the influence of the magnetic flux, and in the figure, the coil C receives a force to the right, and conversely, the magnet M receives a force to the left. You will receive power. Therefore, even if the magnetic poles of the magnet are opposed to the coil forming surface, a force can be generated in the direction that crosses the coil. 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
のであり、箱体を形成する支持体１右側板に対し
支持体１の底面と平行に２枚の第１弾性板２ａ，
２ｂを固定し、該第１弾性板２ａ，２ｂの自由端
にてＬ字状の中間支持ブロツク３の一辺３ａを挾
持固定し、該中間支持ブロツク３の他辺３ｂ上に
平行な２枚の第２弾性板４ａ，４ｂ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ツク６を挾持固定
している。従つて前記中間支持ブロツク３を上下
に変位せしめれば前記第１弾性板２ａ，２ｂのた
わみによつて前記対物レンズ５がフオーカシング
方向に変位し、前記レンズ支持ブロツク６を左右
に変位せしめれば前記第２弾性板４ａ，４ｂのた
わみによつて前記対物レンズ５がトラツキング方
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を上下左右に変位自在に支持することが
できる。尚図中支持体１、中間支持ブロツク３及
びレンズ支持ブロツク６には光通過用の透孔１
ａ，３ｃ，６ａが穿設されており、レンズ支持ブ
ロツク６の透孔６ａ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てある）。 FIG. 2 shows a cross-section of the support mechanism of this embodiment, in which two first elastic plates 2a,
2b is fixed, one side 3a of the L-shaped intermediate support block 3 is clamped and fixed by the free ends of the first elastic plates 2a and 2b, and two parallel plates are fixed on the other side 3b of the intermediate support block 3. The second elastic plates 4a and 4b are fixed upright, and a lens support block 6 on which an objective lens 5 is disposed is clamped and fixed at the free ends of the second elastic plates 4a and 4b. Therefore, if the intermediate support block 3 is moved up and down, the objective lens 5 will be moved in the focusing direction due to the deflection of the first elastic plates 2a and 2b, and if the lens support block 6 is moved left and right, the objective lens 5 will be moved in the focusing direction. The objective lens 5 is displaced in the tracking direction due to the deflection of the second elastic plates 4a and 4b, and the objective lens 5 can be supported with a simple structure so as to be movable vertically and horizontally. In addition, in the figure, the support body 1, the intermediate support block 3, and the lens support block 6 have through holes 1 for light passage.
a, 3c, and 6a, and an objective lens is fitted into the through hole 6a of the lens support block 6 (however, it is shown exploded in FIG. 2).
本実施例は、第２図に図示する支持機構に第１
図に原理的に図示した駆動機構を採用するもので
あり、第３図の平面図第４図の縦断面図に図示す
る様に、前記中間支持ブロツク３の一辺３ａの背
面に第１磁石７を固定し前後方向に磁束を形成
し、前記レンズ支持ブロツク６の前後にも一対の
第２磁石８ａ，８ｂを固定して前後方向に磁束を
形成しており、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れる。本実施例は、前
記第１磁石７を挾んで対向する位置にコイル巻線
を施した第１磁性板９ａ，９ｂを配しており、該
第１磁性板９ａ，９ｂのコイル巻線C1，C2は横
方向（即ちトラツキング方向）に形成されてお
り、一方のコイル面を前記支持体１の前後面に接
着固定している。更に本実施例は前記第２磁石８
ａ，８ｂにも同様に第２磁性板１０ａ，１０ｂを
対向せしめており、コイル巻線C3，C4は上下方
向（即ちフオーカシング方向）に施されて前記支
持体１の前後面に接着固定されている。 In this embodiment, the support mechanism shown in FIG.
As shown in the plan view of FIG. 3 and the vertical sectional view of FIG. A pair of second magnets 8a and 8b are also fixed at the front and rear of the lens support block 6 to form a magnetic flux in the front and rear direction. It is formed in a direction perpendicular to the displacement. In this embodiment, first magnetic plates 9a and 9b each having a coil winding are disposed at opposite positions sandwiching the first magnet 7, and the coil winding C1 of the first magnetic plates 9a and 9b is , C2 are formed in the lateral direction (that is, in the tracking direction), and one coil surface is adhesively fixed to the front and rear surfaces of the support 1. Furthermore, in this embodiment, the second magnet 8
Similarly, second magnetic plates 10a and 10b are placed opposite to a and 8b, and coil windings C 3 and C 4 are applied in the vertical direction (that is, in the focusing direction) and are adhesively fixed to the front and rear surfaces of the support 1. has been done.
従つてトラツキング制御信号を第２磁性板１０
ａ，１０ｂのコイルに印加すれば対物レンズ５が
左右に動いてトラツキングが為され、フオーカシ
ング制御信号を第２磁性板１０ａ，１０ｂのコイ
ルに印加すれば対物レンズが上下に動いてフオー
カス制御が為される。第５図は対物レンズの変位
を模式的に示したものであり、図の△ｄは前記第
１弾性板２ａ，２ｂのたわみによつて生ずるフオ
ーカシング方向の変位量であり、△ｌは第２弾性
板４ａ，４ｂのたわみによつて生ずるトラツキン
グ方向の変位量である。 Therefore, the tracking control signal is transmitted to the second magnetic plate 10.
When a focusing control signal is applied to the coils of the second magnetic plates 10a and 10b, the objective lens 5 moves left and right to perform tracking, and when the focusing control signal is applied to the coils of the second magnetic plates 10a and 10b, the objective lens moves up and down to perform focus control. be done. FIG. 5 schematically shows the displacement of the objective lens, and Δd in the figure is the amount of displacement in the focusing direction caused by the deflection of the first elastic plates 2a and 2b, and Δl is the displacement of the second elastic plate. This is the amount of displacement in the tracking direction caused by the deflection of the elastic plates 4a and 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。尚本発明
に於て中間支持ブロツクとレンズ支持ブロツクの
両方を変位せしめてフオーカシング制御を為しレ
ンズ支持ブロツ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イス
クプレヤーがビデオデイスクプレーヤに比しデイ
スクの面振れが少なくトラツ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 present 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.The reason is that a compact disc player for audio is compared to a video disc player. This is because there is less surface runout of the disk and priority is given to tracking control.
図は何れも本発明の一実施例を示し、第１図は
本実施例の駆動原理説明図、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図は本実施例機構の縦断面図、
第５図は本実施例機構の変位状態を示す縦断面図
をそれぞれ顕わす。
主な図番の説明 １……支持体、２ａ，２ｂ…
…第１弾性板、３……中間支持ブロツク、４ａ，
４ｂ……第２弾性板、６……レンズ支持ブロツ
ク、７……第１磁石、８ａ，８ｂ……第２磁石、
９ａ，９ｂ……第１磁性板、１０ａ，１０ｂ……
第２磁性板。
Each of the figures shows an embodiment of the present invention. Fig. 1 is an explanatory diagram of the driving principle of this embodiment, Fig. 2 is a partially cutaway perspective view of the support mechanism of this embodiment, and Fig. 3 is an embodiment of the present invention. A plan view of the mechanism, FIG. 4 is a longitudinal sectional view of the mechanism of this embodiment,
FIG. 5 shows longitudinal sectional views showing the displacement state of the mechanism of this embodiment. Explanation of main drawing numbers 1...Support, 2a, 2b...
...First elastic plate, 3... Intermediate support block, 4a,
4b... Second elastic plate, 6... Lens support block, 7... First magnet, 8a, 8b... Second magnet,
9a, 9b...first magnetic plate, 10a, 10b...
Second magnetic plate.
Claims (1)
に直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Ｌ字状の中間支持ブロ
ツクと、該中間支持ブロツクの他辺に一端を固定
されトラツキング方向に直交する面を形成する一
対の第２弾性板と、該第２弾性板の他端に挾持さ
れ内方に対物レンズを支持するレンズ支持ブロツ
クと、前記可動ブロツクの一辺背面に固定され磁
束をフオーカシング及びトラツキング方向と直交
する方向に形成する第１磁石と、トラツキング方
向にコイル巻線を施され前記第１磁石の磁束に直
交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ツクに固定され磁束をフ
オーカシング及びトラツ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、フオーカシング
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れる一対の第２磁性
板とをそれぞれ配し、前記中間ブロツクをフオー
カシング方向に変位せしめると共に前記レンズ支
持ブロツクをトラツキング方向に変位せしめるこ
とを特徴とする光学式デイ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; one side of the first elastic plates being held at the other end, and a through hole for light passage being bored in the other side; a substantially L-shaped intermediate support block, a pair of second elastic plates having one end fixed to the other side of the intermediate support block and forming a surface orthogonal to the tracking direction; and the other end of the second elastic plates. a first magnet fixed to the rear surface of one side of the movable block to form magnetic flux in a direction perpendicular to the focusing and tracking directions, and a coil winding in the tracking direction. a pair of first magnetic plates fixed to the support body and perpendicular to the magnetic flux of the first magnet; and a first magnetic plate fixed to the lens support block to form magnetic flux in a direction perpendicular to the focusing and tracking directions. 2 magnets and a pair of second magnetic plates each having a coil winding in the focusing direction and fixed to the support body perpendicular to the magnetic flux of the second magnet, and displacing the intermediate block in the focusing direction. An objective lens support and drive mechanism for an optical disk player, characterized in that the lens support block is moved 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 JPS5860435A (en) | 1983-04-09 |
| JPH026136B2 true 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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4553227A (en) * | 1982-04-23 | 1985-11-12 | Tokyo Shibaura Denki Kabushiki Kaisha | Optical pickup |
-
1981
- 1981-10-05 JP JP15893781A patent/JPS5860435A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5860435A (en) | 1983-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4679904A (en) | Lens driving device for an optical pickup unit with simplified construction | |
| JP2676342B2 (en) | Optical component drive for optical pickup | |
| JP3678729B2 (en) | Actuator for optical pickup | |
| JP2003045057A (en) | Optical pickup actuator | |
| US5640280A (en) | Objective lens driving device for an optical pickup | |
| US5359459A (en) | Optical system driving apparatus | |
| JPH026136B2 (en) | ||
| JPH05334697A (en) | Driving device for optical pick-up objective lens | |
| JPH0725858Y2 (en) | Optical component drive for optical pickup | |
| JPH026137B2 (en) | ||
| JPS5862832A (en) | Lens driving mechanism of optical disk player | |
| JPH064886A (en) | Optical head actuator | |
| US5333124A (en) | Magnetic optical disk player having improved servoresponse sensitivity | |
| JP2828249B2 (en) | Optical system drive | |
| JP2620221B2 (en) | Optical pickup actuator | |
| JP2700005B2 (en) | Objective lens drive | |
| JPH0127134Y2 (en) | ||
| JP2897090B2 (en) | Objective lens drive | |
| JP2515977Y2 (en) | Optical pickup device used for optical disc player | |
| JPS6222246A (en) | Interior magnetic type actuator optical head | |
| JPH0519854Y2 (en) | ||
| JPH055831Y2 (en) | ||
| JP2001023200A (en) | Biaxial actuator | |
| JPH0391122A (en) | Objective lens driving device | |
| JPS60226031A (en) | Objective lens driving device |