JPS612612U

JPS612612U - Zoom lens focus adjustment mechanism

Info

Publication number: JPS612612U
Application number: JP8719284U
Authority: JP
Inventors: 茂雄林
Original assignee: オリンパス光学工業株式会社
Priority date: 1984-06-12
Filing date: 1984-06-12
Publication date: 1986-01-09
Also published as: JPH0248805Y2

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、従来の焦点調整機！を具備したズームレ
ンズの一例を示す十半部の断面図、第２図け、上記第１
図中の焦点調整機構の主要部の分解斜視図、第３図は、
本考案の一実施例を示す焦点調整機構を具備したズーム
レンズの上半部の断面図、第４図は、上記第３図中の焦
点調整機構の主要部の分解斜視図、第５図は、上起第３
，４図中におけるズームリングの平面図、第６図は、上
記第５図中のＸ−Ｘ線に沿う断面図、第７図Ａ，は、上
記第３図のズームレンズにおけ２固定枠と焦点位置調整
環の保合状態をそれぞれ示す要部拡大断面図である。０１，２０・・・ズームレンズ、４・・・固定枠、５・
・・カム枠、７．２１・・・ズームリング、１０・・・
カム枠′ビン−２１ａ・・・カム溝孔、２１ｂ・・・位
置決め用長孔、２２・・・焦点位置調整環、２２ａ・・
・カム溝孔、２３・・・固定用ねじ（固定手段）。．． Figure 1 shows a conventional focus adjustment machine! FIG. 2 is a sectional view showing an example of a zoom lens equipped with
Figure 3 is an exploded perspective view of the main parts of the focus adjustment mechanism in the figure.
FIG. 4 is an exploded perspective view of the main parts of the focus adjustment mechanism shown in FIG. 3, and FIG. , Kamiki No. 3
, 4 is a plan view of the zoom ring in FIG. 4, FIG. 6 is a sectional view taken along the line X-X in FIG. 5, and FIG. 7A is a plan view of the zoom ring in FIG. and FIG. 7 are enlarged cross-sectional views of main parts showing the locked state of the focus position adjustment ring. 01,20...Zoom lens, 4...Fixed frame, 5.
...Cam frame, 7.21...Zoom ring, 10...
Cam frame 'bin - 21a...Cam slot, 21b...Long hole for positioning, 22...Focus position adjustment ring, 22a...
- Cam slot, 23...fixing screw (fixing means).

Claims

[Claims for Utility Model Registration] A focus position adjustment ring rotatably fitted to the fixed frame and provided with a cam slot inclined in the circumferential direction; A zoom ring with a cam slot in the optical axis direction and a positioning hole in the circumferential direction is rotatably fitted to the fixed frame, and both the focus position adjustment ring and the zoom resig are A cam frame for moving the lens frame, in which a cam frame pin that fits into the cam slot is fixed on the outer peripheral surface, and the focus position adjustment ring are integrated into the zoom ring after adjusting the focus position. A focus adjustment mechanism for a zoom lens, comprising: (a) a fixing means for fixing the focus;