JPS6418116A - Zoom mechanism of zoom lens - Google Patents

Zoom mechanism of zoom lens

Info

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
Application number
JP17530687A
Other languages
Japanese (ja)
Other versions
JP2572772B2 (en
Inventor
Hiroshi Akitake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP62175306A priority Critical patent/JP2572772B2/en
Priority to DE3823714A priority patent/DE3823714C2/en
Priority to US07/218,701 priority patent/US4948235A/en
Publication of JPS6418116A publication Critical patent/JPS6418116A/en
Priority to US07/730,109 priority patent/USRE34059E/en
Application granted granted Critical
Publication of JP2572772B2 publication Critical patent/JP2572772B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
JP62175306A 1987-07-13 1987-07-13 Zoom mechanism of zoom lens Expired - Lifetime JP2572772B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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