JPS6418116A - Zoom mechanism of zoom lens - Google Patents
Zoom mechanism of zoom lensInfo
- Publication number
- JPS6418116A JPS6418116A JP17530687A JP17530687A JPS6418116A JP S6418116 A JPS6418116 A JP S6418116A JP 17530687 A JP17530687 A JP 17530687A JP 17530687 A JP17530687 A JP 17530687A JP S6418116 A JPS6418116 A JP S6418116A
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- cam
- zoom
- rotates
- 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.)
- Granted
Links
Abstract
PURPOSE:To reduce the size and driving force quantity of a zoom mechanism by obtaining a turning force associatively with the movement of a zoom frame in the direction of an optical axis, rotating a working cam with the turning force, and moving another lens group holding frame nonlinearly for zooming operation. CONSTITUTION:A feed screw 21 is rotated and the zoom frame 14 moves toward in front of a fixed frame 15 through a feed female screw hole 14b to move forth a focus lens group L1, so that a pinion 19 which engages a rack 20 rotates counterclockwise. When a gear 18 which is united with a support shaft 18a rotates in the same direction and a cam driving gear 17 rotates clockwise, the working cam 16 which is united with its also rotates in the same direction and a guide pin 13c which is fitted in the cam groove hole 16a of the working cam 16 moves along the cam groove hole 16a. Then a lens group L2 moves according to optical design values simultaneously with the focus lens group L1. Consequently, the size is reduced and the driving force quantity is also reduced.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62175306A JP2572772B2 (en) | 1987-07-13 | 1987-07-13 | Zoom mechanism of zoom lens |
DE3823714A DE3823714C2 (en) | 1987-07-13 | 1988-07-13 | Device for continuously adjusting the focal length of a zoom lens |
US07/218,701 US4948235A (en) | 1987-07-13 | 1988-07-13 | Zooming mechanism for zoom lens |
US07/730,109 USRE34059E (en) | 1987-07-13 | 1991-07-15 | Zooming mechanism for zoom lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62175306A JP2572772B2 (en) | 1987-07-13 | 1987-07-13 | Zoom mechanism of zoom lens |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6418116A true JPS6418116A (en) | 1989-01-20 |
JP2572772B2 JP2572772B2 (en) | 1997-01-16 |
Family
ID=15993790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62175306A Expired - Lifetime JP2572772B2 (en) | 1987-07-13 | 1987-07-13 | Zoom mechanism of zoom lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2572772B2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02166427A (en) * | 1988-12-20 | 1990-06-27 | Konica Corp | Optical system moving device for camera |
JPH02210314A (en) * | 1989-02-09 | 1990-08-21 | Fuji Photo Optical Co Ltd | Zoom lens driving mechanism |
JPH03180822A (en) * | 1989-12-08 | 1991-08-06 | Canon Inc | Zoom lens barrel |
JPH03223803A (en) * | 1990-01-30 | 1991-10-02 | Canon Inc | Zoom lens barrel |
US5464056A (en) * | 1992-12-21 | 1995-11-07 | Calsonic Corporation | Housingless type oil cooler and method for producing the same |
JP2001343577A (en) * | 2000-05-30 | 2001-12-14 | Canon Inc | Optical equipment and photographing device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57150842U (en) * | 1981-03-14 | 1982-09-21 | ||
JPS59176712A (en) * | 1983-03-25 | 1984-10-06 | Matsushita Electric Ind Co Ltd | Lens moving device |
JPS6180211A (en) * | 1984-09-28 | 1986-04-23 | Sony Corp | Zooming mechanism of zoom lens |
-
1987
- 1987-07-13 JP JP62175306A patent/JP2572772B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57150842U (en) * | 1981-03-14 | 1982-09-21 | ||
JPS59176712A (en) * | 1983-03-25 | 1984-10-06 | Matsushita Electric Ind Co Ltd | Lens moving device |
JPS6180211A (en) * | 1984-09-28 | 1986-04-23 | Sony Corp | Zooming mechanism of zoom lens |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02166427A (en) * | 1988-12-20 | 1990-06-27 | Konica Corp | Optical system moving device for camera |
JPH02210314A (en) * | 1989-02-09 | 1990-08-21 | Fuji Photo Optical Co Ltd | Zoom lens driving mechanism |
JPH03180822A (en) * | 1989-12-08 | 1991-08-06 | Canon Inc | Zoom lens barrel |
JPH03223803A (en) * | 1990-01-30 | 1991-10-02 | Canon Inc | Zoom lens barrel |
US5464056A (en) * | 1992-12-21 | 1995-11-07 | Calsonic Corporation | Housingless type oil cooler and method for producing the same |
US5513702A (en) * | 1992-12-21 | 1996-05-07 | Calsonic Corporation | Housingless type oil cooler and method for producing the same |
US5590709A (en) * | 1992-12-21 | 1997-01-07 | Calsonic Corporation | Housingless type oil cooler and method for producing the same |
JP2001343577A (en) * | 2000-05-30 | 2001-12-14 | Canon Inc | Optical equipment and photographing device |
Also Published As
Publication number | Publication date |
---|---|
JP2572772B2 (en) | 1997-01-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071024 Year of fee payment: 11 |