JPS60150512U

JPS60150512U - Zoom lens focus adjustment mechanism

Info

Publication number: JPS60150512U
Application number: JP3724384U
Authority: JP
Inventors: 中根　毅
Original assignee: オリンパス光学工業株式会社
Priority date: 1984-03-15
Filing date: 1984-03-15
Publication date: 1985-10-05

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 the drawing]

第１図は、ズームレンズの各レンズ群の移動状態を示す
線図、第２図は、ズームレンズの最短焦　　　　゛点位
！及び最長焦点位置におけるピント位置のすれ及びピン
ト面からのずれの状態を示す線図、第　　。３図及び第４図は、従来のズームレンズのピント調整機
構の例を夫々示す断面図、第５図は、本考案の一実施例
を示すズームレンズのピント調整機構の断面図、第６図
は、上記第５図のズームレンズのピント調整機構の要部
拡大断面図、第、７図は、上記第６図のズームレンズの
ピント調整機構の要部の分解斜視図である。１１・・・固定枠、１２・・・前枠、１３・・・操作枠
、１３ａ・・・カム溝（カム機構）、２１・・・調整枠
、２２・・・前枠ピン（規制手段）（カム機構）、２３
・・・止どス（固定子株）、２４ａ・・・周溝（規制手
段）、２４ｂ・・・周溝（固定手段）。　　　　　　　
　。Figure 1 is a diagram showing the movement status of each lens group of the zoom lens, and Figure 2 is the minimum focus point of the zoom lens! and a line diagram showing the state of focus position blur and deviation from the focus plane at the longest focal position. 3 and 4 are cross-sectional views showing examples of a conventional zoom lens focus adjustment mechanism, respectively. FIG. 5 is a cross-sectional view of a zoom lens focus adjustment mechanism showing an embodiment of the present invention. FIG. 7 is an enlarged sectional view of a main part of the focus adjustment mechanism of the zoom lens shown in FIG. 5, and FIGS. 7A and 7B are exploded perspective views of main parts of the focus adjustment mechanism of the zoom lens shown in FIG. 6. DESCRIPTION OF SYMBOLS 11... Fixed frame, 12... Front frame, 13... Operation frame, 13a... Cam groove (cam mechanism), 21... Adjustment frame, 22... Front frame pin (regulating means) (cam mechanism), 23
...Stator stock (stator stock), 24a... Circumferential groove (regulating means), 24b... Circumferential groove (fixing means).
.

Claims

[Scope of Claim for Utility Model Registration] A one-piece zoom lens that performs zooming operation by moving the operation frame in the optical axis direction and focusing operation by rotating the operation frame around the optical axis, which holds a focus zoom lens group and A front frame that adjusts focus by moving in the optical axis direction by rotating relative to the frame, and a front frame that is interposed between this front frame and the operation frame to transmit operating force from the operation frame to the front frame. In addition, an adjustment frame for adjusting the relative position of both frames, and a cam mechanism provided in this adjustment frame and the operation frame to allow relative movement of both frames only in the optical axis direction. , a regulating means for preventing movement of the adjustment frame in the optical axis direction with respect to the front frame, and a fixing means for fixing the relative rotational position of the front frame and the adjustment frame after adjustment. A zoom lens focus adjustment mechanism characterized by: