JPS5588038A - Aperture device for zoom lens or the like - Google Patents

Aperture device for zoom lens or the like

Info

Publication number
JPS5588038A
JPS5588038A JP15992978A JP15992978A JPS5588038A JP S5588038 A JPS5588038 A JP S5588038A JP 15992978 A JP15992978 A JP 15992978A JP 15992978 A JP15992978 A JP 15992978A JP S5588038 A JPS5588038 A JP S5588038A
Authority
JP
Japan
Prior art keywords
aperture
stop
lever
aperture blade
drive plate
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
JP15992978A
Other languages
Japanese (ja)
Other versions
JPS5946369B2 (en
Inventor
Takeshi Muryoi
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.)
Nikon Corp
Nippon Chemical Industrial Co Ltd
Original Assignee
Nippon Chemical Industrial Co Ltd
Nippon Kogaku KK
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 Nippon Chemical Industrial Co Ltd, Nippon Kogaku KK filed Critical Nippon Chemical Industrial Co Ltd
Priority to JP15992978A priority Critical patent/JPS5946369B2/en
Priority to US06/105,781 priority patent/US4264178A/en
Priority to DE19792951895 priority patent/DE2951895A1/en
Publication of JPS5588038A publication Critical patent/JPS5588038A/en
Publication of JPS5946369B2 publication Critical patent/JPS5946369B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Diaphragms For Cameras (AREA)

Abstract

PURPOSE: To eliminate aperture error, by providing an aperture blade control cam means and a means to block interlocking of stop-down lever and aperature blade drive plate.
CONSTITUTION: A cam groove 12a which displaces geometrically to the changes in the number of stages of a stop-down lever 13 in the region of vicinity of the initial stage of sop-down, displaces arithmetically to the changes in the number of aperture stages of the stop-down lever 13 in the subsequent region, permits the stop-down lever 13 in the subsequent region, permits the stop- down lever 13 to displace smoothly in the boundary of the region of vicinity of initial stage and the subsequent region, and has the boundary point set in the vicinity of the first stage of the aperture stages, is provided in an aperture blade drive plate 12, and an auxiliary lever 18 having a groove 18a is disposed between the aperture blade drive plate 12 and the stop-down lever 13. In this setting, when the lens group is moved to a wide angle position, aperture blade 11, aperture blade drive plate 12 and protrusion 21 integrally move to the right by distance L, and the aperture blade control plate 12 rotates, so that a pin 16 reaches the highest point of the groove 18a. Then, when an aperture setting lever 14 is moved, the pin 16 goes down to the lowest point in the groove 18a, and the aperture blade 11 operates through the auxiliary lever 18 and aperture blade drive plate 12.
COPYRIGHT: (C)1980,JPO&Japio
JP15992978A 1978-12-27 1978-12-27 Interchangeable lens aperture device Expired JPS5946369B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP15992978A JPS5946369B2 (en) 1978-12-27 1978-12-27 Interchangeable lens aperture device
US06/105,781 US4264178A (en) 1978-12-27 1979-12-20 Diaphragm device of a photographic lens
DE19792951895 DE2951895A1 (en) 1978-12-27 1979-12-21 VISOR DEVICE FOR A PHOTOGRAPHIC LENS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15992978A JPS5946369B2 (en) 1978-12-27 1978-12-27 Interchangeable lens aperture device

Publications (2)

Publication Number Publication Date
JPS5588038A true JPS5588038A (en) 1980-07-03
JPS5946369B2 JPS5946369B2 (en) 1984-11-12

Family

ID=15704228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15992978A Expired JPS5946369B2 (en) 1978-12-27 1978-12-27 Interchangeable lens aperture device

Country Status (1)

Country Link
JP (1) JPS5946369B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891435A (en) * 1981-11-27 1983-05-31 Canon Inc Aperture correction mechanism for optical equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891435A (en) * 1981-11-27 1983-05-31 Canon Inc Aperture correction mechanism for optical equipment

Also Published As

Publication number Publication date
JPS5946369B2 (en) 1984-11-12

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