JP2541875Y2 - Drive - Google Patents
DriveInfo
- Publication number
- JP2541875Y2 JP2541875Y2 JP1985163121U JP16312185U JP2541875Y2 JP 2541875 Y2 JP2541875 Y2 JP 2541875Y2 JP 1985163121 U JP1985163121 U JP 1985163121U JP 16312185 U JP16312185 U JP 16312185U JP 2541875 Y2 JP2541875 Y2 JP 2541875Y2
- Authority
- JP
- Japan
- Prior art keywords
- support shaft
- lens holder
- holder
- coil
- longitudinal direction
- 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 - Lifetime
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は駆動装置，特に光学式デイスクの情報記録面
に集光される光スポツトのトラツクずれ及び焦点ずれを
制御するようにした再生装置又は記録・再生装置の光学
手段駆動装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a drive device, in particular, a reproducing device or a reproducing device which controls a track shift and a focus shift of an optical spot focused on an information recording surface of an optical disk. The present invention relates to an optical device driving device of a recording / reproducing device.
従来，光学手段の駆動装置としては，第２図乃至第５
図に示すものがある。Conventionally, as a driving device of an optical means, FIGS.
Some are shown in the figure.
同図において，（１）は対物レンズ，（２）はカウン
ターウエイト，（３）は筒状の可動軸受（3a）を有する
レンズホルダ，（４）は支軸であり，周方向に回動自在
でかつ長手方向に摺動自在に，上記可動軸受（3a）が嵌
装される。（５）はレンズホルダ（３）を保持する支持
ゴム，（６）は永久磁石，（７），（８）はヨーク，
（９）は固定ホルダ，（10）は焦点制御用コイル，（11
a），（11b）はトラツク制御用コイル，（12a），（12
b）は固定ねじ，（13）はカバー，（14）はコイルホル
ダ，（15a），（15b），（15c），（15d）はリード線，
（16a），（16b），（16c），（16d）はコイル引出用の
基板である。In the figure, (1) is an objective lens, (2) is a counterweight, (3) is a lens holder having a cylindrical movable bearing (3a), and (4) is a support shaft, which is rotatable in the circumferential direction. The movable bearing (3a) is fitted so as to be slidable in the longitudinal direction. (5) is a supporting rubber for holding the lens holder (3), (6) is a permanent magnet, (7) and (8) are yokes,
(9) is a fixed holder, (10) is a focus control coil, (11)
a) and (11b) are track control coils, (12a) and (12b)
b) is a fixing screw, (13) is a cover, (14) is a coil holder, (15a), (15b), (15c), and (15d) are lead wires.
(16a), (16b), (16c), and (16d) are coil extraction substrates.
上記構成の駆動装置では，支軸（４）に筒状の可動軸
受（3a）が嵌装されているので，レンズホルダ（３）は
支軸（４）の長手方向すなわち第２図矢印Ａのように摺
動自在に支持されると共に，第４図矢印Ｂのように支軸
（４）を中心に回動自在に保持される。ここで，焦点制
御用コイル（10）に所望の電流を流すことによりレンズ
ホルダ（３）を矢印Ａ方向に移動させることによりフオ
ーカス制御ができ，また支軸（４）より一定距離離間し
て対物レンズ（１）をコイルホルダ（14）に固定してい
るので，トラツク制御用コイル（11a），（11b）に所望
の電流を流して矢印Ｂ方向に対物レンズ（１）を回動さ
せることによりトラツク制御を行うことができる。In the driving device having the above configuration, since the cylindrical movable bearing (3a) is fitted on the support shaft (4), the lens holder (3) is moved in the longitudinal direction of the support shaft (4), that is, as indicated by an arrow A in FIG. And slidably supported about the support shaft (4) as shown by arrow B in FIG. Here, focus control can be performed by moving the lens holder (3) in the direction of arrow A by passing a desired current through the focus control coil (10), and the objective can be separated from the support shaft (4) by a certain distance. Since the lens (1) is fixed to the coil holder (14), a desired current is applied to the track control coils (11a) and (11b) to rotate the objective lens (1) in the direction of arrow B. Track control can be performed.
従来の駆動装置によれば，支軸（４）の材質として
は，ステンレス材もしくは，ステンレス材にフッ素樹脂
系の低摩擦材料をコーテイングするのが一般的であつ
た。このため第５図に示すように支軸（４）が磁性体で
あるため，支軸（４）を経由する磁路が形成され，結果
としてコイルを配置する空隔部（Ｐ点部分）の磁束密度
が低下するという問題があり，小型化・性能向上の制約
となつていた。According to the conventional driving device, as the material of the support shaft (4), it is common to coat a stainless steel material or a fluororesin-based low friction material on the stainless steel material. For this reason, as shown in FIG. 5, since the support shaft (4) is a magnetic material, a magnetic path passing through the support shaft (4) is formed. As a result, the space (point P) where the coil is arranged is formed. There was a problem that the magnetic flux density was reduced, which was a constraint on miniaturization and performance improvement.
本考案は上記の問題点を解決するためになされたもの
であり，コイルを配置する空隔部の効率を向上させた駆
動装置を提供することを目的としている。The present invention has been made to solve the above problems, and has as its object to provide a drive device in which the efficiency of a space where a coil is arranged is improved.
〔問題点を解決するための手段〕 上記目的を達成するための本考案に係る駆動装置の特
徴は，支軸を非磁性体材料で構成したことにある。[Means for Solving the Problems] A feature of the drive device according to the present invention for achieving the above object is that the support shaft is made of a non-magnetic material.
上記のように構成したので支軸を経由する磁路が形成
されにくく，結果として必要な空隔（Ｐ点部分）部での
磁束密度低下がなく，効率劣化がない。With the above configuration, it is difficult to form a magnetic path passing through the support shaft, and as a result, there is no reduction in magnetic flux density at a necessary space (point P), and there is no deterioration in efficiency.
以下，本考案に係る駆動装置の実施例について図面を
用いて詳細に説明する。第１図は本考案の一実施例を説
明するためのものであり，第２図乃至第５図と同一符号
を付したものは，同一又は相当する部材を示している。Hereinafter, embodiments of the driving device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is for explaining one embodiment of the present invention, in which the same reference numerals as in FIGS. 2 to 5 indicate the same or corresponding members.
図において，支軸（40）は摺動性の良好なプラスチツ
ク材料（フッ素樹脂系）で形成されており，支軸（40）
を経由する磁路が形成されにくく必要とする空隔（Ｐ点
付近）の磁束密度が最も有効に得られる磁路が形成され
る。In the figure, the support shaft (40) is made of a plastic material (fluororesin) with good slidability.
A magnetic path through which the magnetic flux density is most effectively obtained in a required space (around point P) is hardly formed.
この場合軸受部（3a）は，アルミ等の材料で形成すれ
ばよい。In this case, the bearing (3a) may be formed of a material such as aluminum.
以上のように構成することにより不要な部分の磁路が
形成されにくくなる。すなわち非磁性材料で支軸
（４），軸受部（3a）を形成することにより等価的にパ
ーミアンスを上げることができ，必要な空隔部の磁束密
度が向上し駆動装置の駆動効率を向上できる。又，小型
化にも適する。With the above configuration, it is difficult to form an unnecessary portion of the magnetic path. That is, by forming the support shaft (4) and the bearing portion (3a) with a non-magnetic material, the permeance can be increased equivalently, the magnetic flux density in the necessary space can be improved, and the drive efficiency of the drive device can be improved. . It is also suitable for miniaturization.
第１図は本考案に係る駆動装置の一実施例を説明するた
めの部分断面図，第２図は従来の駆動装置の一例を示す
部分断面図，第３図は同じく分解斜視図，第４図は同じ
くレンズホルダの平面図，第５図は同じく部分断面図で
ある。 図において（６）は永久磁石，（７），（８）はヨー
ク，（40）は支軸である。 図中，同一符号は同一又は相当部分を示す。FIG. 1 is a partial cross-sectional view illustrating an embodiment of a driving device according to the present invention, FIG. 2 is a partial cross-sectional view illustrating an example of a conventional driving device, FIG. The figure is a plan view of the lens holder, and FIG. 5 is a partial sectional view of the lens holder. In the figure, (6) is a permanent magnet, (7) and (8) are yokes, and (40) is a support shaft. In the drawings, the same reference numerals indicate the same or corresponding parts.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭53−114406（ＪＰ，Ａ) 実開 昭60−80516（ＪＰ，Ｕ) 実開 昭60−169720（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-53-114406 (JP, A) JP-A-60-80516 (JP, U) JP-A-60-169720 (JP, U)
Claims (1)
向に回動可能かつ長手方向に移動可能にされた筒状の可
動軸受と、この可動軸受に固定され、上記支軸の延長方
向と平行な光軸を有する対物レンズを保持するレンズホ
ルダと、このレンズホルダに固定されたコイルホルダ
と、このコイルホルダに取り付けられ、上記レンズホル
ダを上記支軸の周方向及び長手方向に駆動するように付
勢する電磁コイルと、上記レンズホルダを駆動し上記対
物レンズを介してディスクに集光される光スポットのト
ラックずれ及び焦点ずれを制御する駆動手段を備えた駆
動装置において、上記支軸を非磁性体とし、上記駆動手
段を上記支軸に対してそれぞれ同心的に配置された環状
永久磁石及び環状ヨークとで構成するとともに、上記環
状永久磁石を内周側に上記支軸の長手方向に着磁して配
置し、上記環状ヨークを外周側に配置して構成される磁
気回路中に上記電磁コイルを挿入するようにしたことを
特徴とする駆動装置。1. A support shaft, a cylindrical movable bearing fitted to the support shaft, rotatable in a circumferential direction of the support shaft and movable in a longitudinal direction, fixed to the movable bearing, A lens holder for holding an objective lens having an optical axis parallel to the direction in which the support shaft extends, a coil holder fixed to the lens holder, and a lens holder attached to the coil holder, the lens holder being mounted in the circumferential direction of the support shaft. An electromagnetic coil for urging the lens holder to be driven in the longitudinal direction, and a drive unit for driving the lens holder and controlling a track shift and a focus shift of a light spot focused on a disk via the objective lens. In the device, the support shaft is made of a non-magnetic material, and the driving means is constituted by an annular permanent magnet and an annular yoke which are respectively arranged concentrically with respect to the support shaft, and the annular permanent magnet is disposed on an inner circumferential side. Place magnetized in the longitudinal direction of the support shaft, the drive device being characterized in that so as to insert the electromagnetic coil in the magnetic circuit formed by arranging the annular yoke on the outer peripheral side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985163121U JP2541875Y2 (en) | 1985-10-24 | 1985-10-24 | Drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985163121U JP2541875Y2 (en) | 1985-10-24 | 1985-10-24 | Drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6273325U JPS6273325U (en) | 1987-05-11 |
| JP2541875Y2 true JP2541875Y2 (en) | 1997-07-23 |
Family
ID=31091025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985163121U Expired - Lifetime JP2541875Y2 (en) | 1985-10-24 | 1985-10-24 | Drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2541875Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6080516U (en) * | 1983-11-05 | 1985-06-04 | ソニー株式会社 | Objective lens drive device for optical pickup equipment |
| JPS60169720U (en) * | 1984-04-16 | 1985-11-11 | シャープ株式会社 | objective lens device |
| JPS63114406A (en) * | 1986-10-31 | 1988-05-19 | Toshiba Corp | Gain control device for variable amplifier circuit |
-
1985
- 1985-10-24 JP JP1985163121U patent/JP2541875Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6273325U (en) | 1987-05-11 |
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