JPS648222U - - Google Patents
Info
- Publication number
- JPS648222U JPS648222U JP10098787U JP10098787U JPS648222U JP S648222 U JPS648222 U JP S648222U JP 10098787 U JP10098787 U JP 10098787U JP 10098787 U JP10098787 U JP 10098787U JP S648222 U JPS648222 U JP S648222U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- cover
- drive
- drive device
- light
- 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
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図および第２図はこの考案の一実施例のそ
れぞれ対物レンズ保護キヤツプ取付前および取付
後の平面図、第３図は第２図の―線に沿う平
面での断面図、第４図は従来の対物レンズ駆動装
置のカバーを透視して示す平面図、第５図は第４
図の―線に沿う平面での断面図、第６図は第
４図の―線に沿う平面での断面図、第７図は
平面図である。
３……対物レンズ、７……トラツキング方向制
御用コイル（駆動用コイル）、１２……トラツキ
ング方向制御用永久磁石（駆動用磁石）、２２…
…カバー、２３……対物レンズ用穴（穴）、２４
……位置決め部、２５……対物レンズ保護キヤツ
プ、２６……磁性体。なお、各図中、同一符号は
同一または相当部分を示す。
Figures 1 and 2 are plan views of an embodiment of this invention before and after the objective lens protection cap is attached, respectively, Figure 3 is a sectional view taken along the line - in Figure 2, and Figure 4. 5 is a plan view showing the cover of a conventional objective lens drive device as seen through, and FIG.
FIG. 6 is a cross-sectional view taken along the line - in FIG. 4, and FIG. 7 is a plan view. 3... Objective lens, 7... Tracking direction control coil (drive coil), 12... Tracking direction control permanent magnet (drive magnet), 22...
...Cover, 23...Objective lens hole (hole), 24
...Positioning unit, 25...Objective lens protection cap, 26...Magnetic material. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
ツトを形成して情報を記録再生すべく、対物レン
ズを焦点方向に駆動するとともに、前記光スポツ
トをトラツクに追従させるために前記対物レンズ
を駆動する駆動用コイルおよび駆動用磁石を備え
、前記対物レンズよりの出射光を通す穴をもつカ
バーにて保護される対物レンズ駆動装置において
、前記カバーに内接して配置された前記駆動用磁
石と、前記カバー上で前記穴を塞ぎ前記駆動用磁
石の漏れ磁束で吸着される磁性体が装着された対
物レンズ保護キヤツプとを備えてなることを特徴
とする光学式デイスク装置の対物レンズ駆動装置
。 (2) カバーを非磁性材とし、このカバーに内接
する駆動用磁石が前記カバーに内接位置決めでき
るように前記カバーに位置決め部が設けられてい
る実用新案登録請求の範囲第１項記載の光学式デ
イスク装置の対物レンズ駆動装置。[Claims for Utility Model Registration] (1) In order to collect light from a light source and form a light spot on a disk to record and reproduce information, an objective lens is driven in the focal direction and the light spot is tracked. In the objective lens drive device, the objective lens drive device includes a drive coil and a drive magnet for driving the objective lens to follow the objective lens, and is protected by a cover having a hole through which light emitted from the objective lens passes. an objective lens protection cap, which is equipped with a magnetic material that closes the hole on the cover and is attracted by the leakage magnetic flux of the drive magnet. Objective lens drive device for type disk device. (2) The optical system according to claim 1, wherein the cover is made of a non-magnetic material, and the cover is provided with a positioning part so that the drive magnet inscribed in the cover can be positioned in the cover. Objective lens drive device for type disk device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10098787U JPS648222U (en) | 1987-07-02 | 1987-07-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10098787U JPS648222U (en) | 1987-07-02 | 1987-07-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS648222U true JPS648222U (en) | 1989-01-18 |
Family
ID=31329566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10098787U Pending JPS648222U (en) | 1987-07-02 | 1987-07-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS648222U (en) |
-
1987
- 1987-07-02 JP JP10098787U patent/JPS648222U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS58163908U (en) | Objective lens drive device | |
| JPS648222U (en) | ||
| JPH0230120U (en) | ||
| JPH0268301U (en) | ||
| JPS62285261A (en) | Leakage magnetic field correcting device | |
| JPH075551Y2 (en) | Magneto-optical head | |
| JPS58137140A (en) | Optical system driving device of optical information recording and reproducing device | |
| JPS6120663Y2 (en) | ||
| JPH0320038U (en) | ||
| JPS6112596Y2 (en) | ||
| JPH0416627U (en) | ||
| JPS63176932U (en) | ||
| JP2552494Y2 (en) | External magnetic field application device for magneto-optical recording device | |
| JPS63173725U (en) | ||
| JPS62133215U (en) | ||
| JPS591131U (en) | Focus control device for optical recording media | |
| JPS62180322U (en) | ||
| JPS6255219U (en) | ||
| JPS5848032U (en) | Objective lens drive device for optical information recording and reproducing equipment | |
| JPH0258749A (en) | Optical head | |
| JPS627622U (en) | ||
| JPS6229636U (en) | ||
| JPH0193617U (en) | ||
| JPH02149116U (en) | ||
| JPS60142825U (en) | Optical pickup objective lens drive device |