JPH01181123U - - Google Patents
Info
- Publication number
- JPH01181123U JPH01181123U JP7793288U JP7793288U JPH01181123U JP H01181123 U JPH01181123 U JP H01181123U JP 7793288 U JP7793288 U JP 7793288U JP 7793288 U JP7793288 U JP 7793288U JP H01181123 U JPH01181123 U JP H01181123U
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- movable body
- axis direction
- housing
- generates
- 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
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims 2
- 239000012530 fluid Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
図面は本考案の一実施例を示すもので、第１図
は断面図、第２図は周波数特性図、第３図は光軸
方向動作特性図である。
１…対物レンズ、２…レンズ保持枠、４…コイ
ルボビン、５…可動体、６…ハウジング、７，８
…板ばね、１５…外ヨーク、１６…磁石、１７…
内ヨーク、１９…コイル、２３…エアギヤツプ、
２４…絞り孔。
The drawings show an embodiment of the present invention; FIG. 1 is a sectional view, FIG. 2 is a frequency characteristic diagram, and FIG. 3 is an optical axis direction operating characteristic diagram. DESCRIPTION OF SYMBOLS 1... Objective lens, 2... Lens holding frame, 4... Coil bobbin, 5... Movable body, 6... Housing, 7, 8
...Plate spring, 15...Outer yoke, 16...Magnet, 17...
Inner yoke, 19...coil, 23...air gap,
24...Aperture hole.
Claims (1)
グに支持されて対物レンズを収納保持するレンズ
保持枠とコイルボビンとを光軸方向に一体化した
可動体を設け、前記ハウジングに固定された永久
磁石と外ヨークと内ヨークとにより形成される磁
気回路中にて前記コイルボビンに巻回されたコイ
ルへの通電制御により発生する電磁駆動力により
前記可動体を光軸方向に可動させるムービングコ
イル型の対物レンズ駆動装置において、流出入す
る空気の流体抵抗により前記可動体の光軸方向に
対する減衰力を生成するエアギヤツプを形成し、
流出入する空気の流体抵抗により前記可動体の光
軸直角方向に対する減衰力を生成する絞り孔を形
成したことを特徴とする対物レンズ駆動装置。 A movable body is provided in which a lens holding frame and a coil bobbin, which are supported by a housing so as to be movable in the optical axis direction via a plate spring and which house and hold the objective lens, are integrated in the optical axis direction, and a permanent magnet is fixed to the housing. A moving coil type objective that moves the movable body in the optical axis direction by an electromagnetic driving force generated by controlling energization of a coil wound around the coil bobbin in a magnetic circuit formed by an outer yoke and an inner yoke. In the lens driving device, an air gap is formed that generates a damping force in the optical axis direction of the movable body due to fluid resistance of air flowing in and out;
An objective lens driving device characterized in that an aperture hole is formed that generates a damping force in a direction perpendicular to the optical axis of the movable body due to fluid resistance of air flowing in and out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7793288U JPH01181123U (en) | 1988-06-13 | 1988-06-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7793288U JPH01181123U (en) | 1988-06-13 | 1988-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01181123U true JPH01181123U (en) | 1989-12-27 |
Family
ID=31302889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7793288U Pending JPH01181123U (en) | 1988-06-13 | 1988-06-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01181123U (en) |
-
1988
- 1988-06-13 JP JP7793288U patent/JPH01181123U/ja active Pending
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