JPS6411212A - Zooming mechanism for zoom lens - Google Patents

Zooming mechanism for zoom lens

Info

Publication number
JPS6411212A
JPS6411212A JP16661187A JP16661187A JPS6411212A JP S6411212 A JPS6411212 A JP S6411212A JP 16661187 A JP16661187 A JP 16661187A JP 16661187 A JP16661187 A JP 16661187A JP S6411212 A JPS6411212 A JP S6411212A
Authority
JP
Japan
Prior art keywords
frame
cam
lens
zoom
lens group
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
JP16661187A
Other languages
Japanese (ja)
Other versions
JPH07104470B2 (en
Inventor
Hiroshi Akitake
Takeshi Ito
Koji Kato
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 JP16661187A priority Critical patent/JPH07104470B2/en
Publication of JPS6411212A publication Critical patent/JPS6411212A/en
Publication of JPH07104470B2 publication Critical patent/JPH07104470B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Lens Barrels (AREA)

Abstract

PURPOSE:To reduce the size, cost, and driving force quantity of a zoom lens by zooming the lens by a mechanism which uses a helicoid screw and a solid cam. CONSTITUTION:When a 1st lens group holding frame 12 is moved forth through the helicoid screws 14a and 12a of 1st and 2nd lens holding frames 12 and 13 by rotating a zoom frame 14 manually or by a motor while both are on wide-angle sides, a cam frame 23 and the 2nd lens group holding frame 13 also move forth in one body. At this time, a cam frame 23 rotates together with the zoom frame 14 through the cam frame rotating groove 14b of the zoom frame 14 and the pin 24 of the cam frame 23, so the 2nd lens group holding frame 13 moves forth toward the 1st lens group holding frame 12 through an engagement pin 22 pressed against the cam surface 23a of said cam frame 23. Consequently, a zooming mechanism for a zoom lens is obtained which is low in working cost and small in size and driving force quantity and has high accuracy.
JP16661187A 1987-07-03 1987-07-03 Zoom lens zoom mechanism Expired - Lifetime JPH07104470B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16661187A JPH07104470B2 (en) 1987-07-03 1987-07-03 Zoom lens zoom mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16661187A JPH07104470B2 (en) 1987-07-03 1987-07-03 Zoom lens zoom mechanism

Publications (2)

Publication Number Publication Date
JPS6411212A true JPS6411212A (en) 1989-01-13
JPH07104470B2 JPH07104470B2 (en) 1995-11-13

Family

ID=15834517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16661187A Expired - Lifetime JPH07104470B2 (en) 1987-07-03 1987-07-03 Zoom lens zoom mechanism

Country Status (1)

Country Link
JP (1) JPH07104470B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0289012A (en) * 1988-09-26 1990-03-29 Asahi Optical Co Ltd Lens barrel for zoom lens
JPH02245714A (en) * 1989-03-18 1990-10-01 Canon Inc lens barrel
JPH0573615U (en) * 1992-03-12 1993-10-08 旭精密株式会社 Zoom lens barrel
US5469300A (en) * 1989-10-27 1995-11-21 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens barrel
DE4042657C2 (en) * 1989-10-27 2000-02-03 Asahi Optical Co Ltd Zoom lens barrel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0289012A (en) * 1988-09-26 1990-03-29 Asahi Optical Co Ltd Lens barrel for zoom lens
JPH02245714A (en) * 1989-03-18 1990-10-01 Canon Inc lens barrel
US5469300A (en) * 1989-10-27 1995-11-21 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens barrel
DE4042657C2 (en) * 1989-10-27 2000-02-03 Asahi Optical Co Ltd Zoom lens barrel
JPH0573615U (en) * 1992-03-12 1993-10-08 旭精密株式会社 Zoom lens barrel

Also Published As

Publication number Publication date
JPH07104470B2 (en) 1995-11-13

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