JPS6011313U

JPS6011313U - Zoom lens structure that allows for extremely close-up photography

Info

Publication number: JPS6011313U
Application number: JP10342083U
Authority: JP
Inventors: 岡島　秀和; 小「峰」　義男
Original assignee: キヤノン株式会社
Priority date: 1983-07-05
Filing date: 1983-07-05
Publication date: 1985-01-25

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図ないし第３図は従来例のズームレンズ構体で、第
１図はその断面図、第２図はそのカム筒の展開図、第３
図はその光軸に垂直な平面での要部断面図、第４図ない
し第７図は本考案に係るズームレンズ構体の一実施例で
、第４図はその光軸上断面図、第５図はその要部の分解
斜視図、第６図はそのカム筒の展開図、第７図はズーム
環とマクロ切換環との関係説明図で、ａはズーム操作時
、ｂはズーム・マクロ切換時Ｃはマクロ操作時、をそれ
ぞれ示す。３・・・・・・ズーム光学系の補正系レンズ、５・・・
・・・固定筒、８・・・・・・補正系移動環、９・・・
・・・ガイドバー、１１・・・・・・ガイドピン、１２
・・・・・・カムＭ、１２ｂ−・・・・・カム虐、１３
・・・・・・ズーム環、１３ａ・・・・・・切欠部、２
１・・・・・・保持筒、２２・・・・・・ピン、２３・
・・・・・マクロ用直進溝、２５・・・・・・コイルば
ね、２６・・・・・・マクロ切換環、２６Ｃ・・・・・
・切欠部、２７・・・・・・マクロ繰り出し部材、２８
・・・・・・マウント筒、２９・・・・・・ばね、３０
・・・・・・マクロロックつマミ。６　　　Ｉｎ　　　！Ｓ　　　ｌ＞ＭＡＣＲＯFigures 1 to 3 show a conventional zoom lens structure, with Figure 1 being a cross-sectional view, Figure 2 being a developed view of its cam barrel, and Figure 3 being an exploded view of its cam barrel.
The figure is a cross-sectional view of the main part in a plane perpendicular to the optical axis, and Figures 4 to 7 are examples of the zoom lens structure according to the present invention, and Figure 4 is a cross-sectional view on the optical axis. The figure is an exploded perspective view of the main parts, Figure 6 is an exploded view of the cam cylinder, and Figure 7 is an explanatory diagram of the relationship between the zoom ring and macro switching ring. Time C indicates the time of macro operation. 3...Correction lens for zoom optical system, 5...
...Fixed barrel, 8...Correction system moving ring, 9...
... Guide bar, 11 ... Guide pin, 12
...Cam M, 12b-...Cam Massage, 13
...Zoom ring, 13a...Notch, 2
1... Holding cylinder, 22... Pin, 23.
... Macro straight groove, 25 ... Coil spring, 26 ... Macro switching ring, 26C ...
・Notch part, 27...Macro feeding member, 28
...Mount tube, 29 ...Spring, 30
...Macro lock knob. 6 In! S l> MACRO

Claims

[Scope of utility model registration request]

In a zoom lens that performs macro photography by displacing a correction lens of a zoom optical system, a holding cylinder of the correction lens and a correction system moving ring are linearly guided and connected to each other, and the holding cylinder is moved along the correction system moving ring during zoom operation. A macro switching ring and a macro feeding member integrated therewith are provided independently of the zoom ring which is moved integrally with the macro switching ring, and when the macro switching ring is operated, the macro feeding member moves only the holding cylinder in the optical axis direction. A zoom lens structure capable of extremely close-up photography, characterized in that it is configured to be able to be displaced.