JPS5994306U

JPS5994306U - zoom lens barrel

Info

Publication number: JPS5994306U
Application number: JP18920482U
Authority: JP
Inventors: 鎌田　滋
Original assignee: キヤノン株式会社
Priority date: 1982-12-16
Filing date: 1982-12-16
Publication date: 1984-06-27

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図は従来例のズームレンズ鏡胴の光軸上断面図、第
２図は同じくその第２移動筒の組立状態を一部断面図で
示した要部背面図、第３図は本考案に係るズームレンズ
鏡胴の一実施例の光軸上断。面図、第４図は同じくその第２移動筒の組立状態を一部
断面で示した要部背面図、第５図はそのカム筒の要部展
開図、第６図は第２移動筒のカムフォロアーの形状の他
の実施例を示す要部平面図である。１・・・・・・第１固定筒、２・・・・・・第２固定筒
、４・・・・・・指標筒、６・・・・・・距離リング、
７・・・・・・カム筒、訃・・・・・第２移動筒、８ａ
・・・・・・ガイドキ一部、Ｂｂ。１１．１４・・・・・・カムフォロアー、９″・・・・
・・ガイド　　　゛キー、１２・・・・・・保持筒、１
３・・・・・・第１移動筒、１５・・・・・・ズーム環
。６　　２ｃ４　１ｍ　　？ｈ′７ｔ？１５　９ａ’　　
、１２６７峰、−１１’ 第５図Fig. 1 is a sectional view on the optical axis of a conventional zoom lens barrel, Fig. 2 is a rear view of the main part showing the assembled state of the second movable barrel, and Fig. 3 is a rear view of the main parts of the zoom lens barrel according to the present invention. 1 is a cross-sectional view on the optical axis of an embodiment of the zoom lens barrel according to the invention. 4 is a rear view of the main part showing the assembled state of the second movable cylinder, FIG. 5 is an exploded view of the main part of the cam cylinder, and FIG. FIG. 7 is a plan view of main parts showing another example of the shape of the cam follower. 1...First fixed barrel, 2...Second fixed barrel, 4...Indicator barrel, 6...Distance ring,
7...Cam cylinder, tail...second moving cylinder, 8a
・・・・・・Part of the guide, Bb. 11.14...Cam follower, 9''...
...Guide key, 12...Holding cylinder, 1
3...First movable barrel, 15...Zoom ring. 6 2c4 1m? h'7t? 15 9a'
, 1267 peak, -11' Figure 5

Claims

[Scope of Claim for Utility Model Registration] 1. A cam cylinder rotatably fitted with a cam cylinder provided with a plurality of cam grooves for controlling the movement of a plurality of movable lens groups in the optical axis direction, and a fixed cylinder provided with a linear guide groove; . A zoom lens barrel having a movable barrel for holding the lens group, wherein at least one of the plurality of cam followers fitted into the cam groove is integrally molded. 2. A utility model registration claim characterized in that the movable tube is slidably fitted into the inner diameter of the fixed tube, and the movable tube and at least one of the plurality of cam followers are integrally molded from a single piece of plastic material. A zoom lens barrel according to scope 1. 3. The zoom lens barrel according to claim 2, wherein the rear end of the fixed barrel has an opening larger than the outer diameter of the movable barrel. 4. The zoom lens barrel according to claim 1, wherein the cam groove of the cam barrel has an opening extending beyond the range of normal use. 5. The cam follower integrally formed with the movable cylinder is characterized in that it has a portion that makes surface contact with the cam groove. A zoom lens barrel according to claim 1 of the utility model registration claim.