JPH0457806U - - Google Patents
Info
- Publication number
- JPH0457806U JPH0457806U JP9983290U JP9983290U JPH0457806U JP H0457806 U JPH0457806 U JP H0457806U JP 9983290 U JP9983290 U JP 9983290U JP 9983290 U JP9983290 U JP 9983290U JP H0457806 U JPH0457806 U JP H0457806U
- Authority
- JP
- Japan
- Prior art keywords
- focus lens
- lens group
- focus
- zoom
- frame
- 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
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Description
第１図は本願ズームレンズ鏡胴の全体構成を示
す断面図、第２図は本願ズームレンズ鏡胴の第１
の実施例におけるフオーカスレンズ群の構成を示
す斜視図、第３図は本願ズームレンズ鏡胴の第２
の実施例におけるフオーカスレンズ群の駆動系を
示す断面図である。
１……ズームレンズ鏡胴本体、２……回転胴、
２ａ……案内溝、３……固定胴、３ａ，３ｂ……
カム溝、４……ズーム筒、４ａ……直進溝、１０
……フオーカスレンズ群、１０ａ……第１フオー
カスレンズ群、１０ｂ……第２フオーカスレンズ
群、１１……第１ズームレンズ群、１２……第２
ズームレンズ群、２０ａ，２０ｂ，２１，２２…
…レンズ枠、２０ｄ……回動リング、３０……フ
レア防止部材、３１……回動部材、３２，３３…
…遮光羽根、３４……地板、Ｐ１，Ｐ２……カム
ピン、Ｃ１，Ｃ３……端面カム、Ｃ２……カムピ
ン、Ｈ１，Ｈ２……ヘリコイド、Ｂ……バネ、Ｍ
……モータ、Ｚ……ズームレンズ系。
FIG. 1 is a cross-sectional view showing the overall configuration of the zoom lens barrel of the present invention, and FIG.
FIG. 3 is a perspective view showing the configuration of the focus lens group in the embodiment of the present invention, and FIG.
FIG. 3 is a cross-sectional view showing a drive system for a focus lens group in the embodiment. 1...Zoom lens barrel body, 2...Rotating barrel,
2a...Guide groove, 3...Fixed barrel, 3a, 3b...
Cam groove, 4... Zoom tube, 4a... Straight groove, 10
...Focus lens group, 10a...First focus lens group, 10b...Second focus lens group, 11...First zoom lens group, 12...Second
Zoom lens group, 20a, 20b, 21, 22...
...Lens frame, 20d... Rotating ring, 30... Flare prevention member, 31... Rotating member, 32, 33...
...shading blade, 34 ... main plate, P 1 , P 2 ... cam pin, C 1 , C 3 ... end cam, C 2 ... cam pin, H 1 , H 2 ... helicoid, B ... spring, M
...Motor, Z...Zoom lens system.
Claims (1)
フオーカスレンズ群と第２フオーカスレンズ群と
に２分割し、かつ両フオーカスレンズ群の相対間
隔を適宜変化させながら合焦可能なズームレンズ
鏡胴において、前記第２フオーカスレンズ群を回
動可能に構成して、固定側に形成したヘリコイド
に螺合し、第１フオーカスレンズ群のレンズ枠を
、固定側または第２フオーカスレンズ群のレンズ
枠に形成した端面カムに対してのみ回動可能に構
成して、バネ付勢により該端面カムに係合したこ
とを特徴とするズームレンズ鏡胴。 The focus lens group of the zoom lens system is
The second focus lens group is rotated in a zoom lens barrel that is divided into two, a focus lens group and a second focus lens group, and is capable of focusing while appropriately changing the relative distance between the two focus lens groups. The lens frame of the first focus lens group is configured to be movable and is screwed into the helicoid formed on the fixed side, so that the lens frame of the first focus lens group is only connected to the end face cam formed on the lens frame of the fixed side or the second focus lens group. A zoom lens barrel configured to be rotatable and engaged with the end cam by spring bias.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9983290U JPH0457806U (en) | 1990-09-25 | 1990-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9983290U JPH0457806U (en) | 1990-09-25 | 1990-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0457806U true JPH0457806U (en) | 1992-05-18 |
Family
ID=31842036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9983290U Pending JPH0457806U (en) | 1990-09-25 | 1990-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0457806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006276596A (en) * | 2005-03-30 | 2006-10-12 | Nidec Copal Corp | Lens-driving device |
-
1990
- 1990-09-25 JP JP9983290U patent/JPH0457806U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006276596A (en) * | 2005-03-30 | 2006-10-12 | Nidec Copal Corp | Lens-driving device |
| JP4619174B2 (en) * | 2005-03-30 | 2011-01-26 | 日本電産コパル株式会社 | Lens drive device |
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