JPS6480935A - Zoom lens barrel - Google Patents
Zoom lens barrelInfo
- Publication number
- JPS6480935A JPS6480935A JP23929187A JP23929187A JPS6480935A JP S6480935 A JPS6480935 A JP S6480935A JP 23929187 A JP23929187 A JP 23929187A JP 23929187 A JP23929187 A JP 23929187A JP S6480935 A JPS6480935 A JP S6480935A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- wheel
- lens frame
- stop
- rotary body
- 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
Abstract
PURPOSE:To correct a stop diameter in zooming operation without rotating a lens frame by rotating a rotary body for stopping down an aperture blade according to the movement quantity of the rotary body when the rotary body is moved in the direction of the optical axis. CONSTITUTION:A stop mechanism 7 consists of a blade case 8, the aperture blade 9, a wheel (rotary body) 10, and a C ring 11, and the wheel 10 is fitted while the stop driving pin 17 of the aperture blade 9 is fitted in the stop driving groove 18 of the wheel 10; and a gear 20 is provided to the projection on the periphery of the wheel 10 and an output bearing 24 having an output gear 23 which engages it is supported pivotally while disabled to move forth and back in the direction of the optical axis. When the lens frame 5 is moved forth in the optical axis direction in the zooming operation, the lens frame 5 does not rotate around the optical axis and the gear 20 of the wheel 10 and the output gear 23 are formed of beveled gears, so the forward movement of the lens frame 5 in the optical axis direction is converted into rotation around the optical axis for the blade case 8 to stop down the aperture blade 9. Consequently, the rotation of the lens frame is eliminated and the stop diameter is corrected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23929187A JPS6480935A (en) | 1987-09-24 | 1987-09-24 | Zoom lens barrel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23929187A JPS6480935A (en) | 1987-09-24 | 1987-09-24 | Zoom lens barrel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6480935A true JPS6480935A (en) | 1989-03-27 |
Family
ID=17042548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23929187A Pending JPS6480935A (en) | 1987-09-24 | 1987-09-24 | Zoom lens barrel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6480935A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7192843B2 (en) | 2001-10-02 | 2007-03-20 | Rohm Co., Ltd. | Method of fabricating semiconductor device |
JP2013148631A (en) * | 2012-01-17 | 2013-08-01 | Tricore Corp | Diaphragm device |
-
1987
- 1987-09-24 JP JP23929187A patent/JPS6480935A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7192843B2 (en) | 2001-10-02 | 2007-03-20 | Rohm Co., Ltd. | Method of fabricating semiconductor device |
JP2013148631A (en) * | 2012-01-17 | 2013-08-01 | Tricore Corp | Diaphragm device |
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