JPS63194311U

JPS63194311U -

Info

Publication number: JPS63194311U
Application number: JP8382487U
Authority: JP
Priority date: 1987-05-30
Filing date: 1987-05-30
Publication date: 1988-12-14

Description

[Brief explanation of the drawing]

第１図は、本考案の実施例を示すズームレンズ
鏡胴の全体構成を一部破断して示す斜視図、第２
図は、第１図に示すズームレンズ鏡胴の収納時に
おけるレンズ位置を概念的に示す断面図、第３図
は、同じく最広角時の状態を示す断面図、第４図
は、同じく最望遠時の状態を示す断面図である。１……カメラ本体、２，３，１５〜１７……ガ
イド棒、４……第１の鏡胴、５……第１の送りね
じ、６，８，９，９ａ，９ｂ，１０，１１，２０
ｂ，２１，２６，２８…歯車、１２……第２の鏡
胴、Ｌ１〜Ｌ３……第１群〜第３群レンズ、１３
，１４……第１群、第２群レンズ枠、１８……圧
縮ばね、２０……カム部材、２５……駆動軸、２
７……送りねじ。 FIG. 1 is a partially cutaway perspective view showing the overall structure of a zoom lens barrel showing an embodiment of the present invention;
The figure is a sectional view conceptually showing the lens position when the zoom lens barrel shown in Fig. 1 is stored, Fig. 3 is a sectional view showing the state at the widest angle, and Fig. 4 is the same at the maximum telephoto position. FIG. 1... Camera body, 2, 3, 15-17... Guide rod, 4... First lens barrel, 5... First feed screw, 6, 8, 9, 9a, 9b, 10, 11, 20
b, 21, 26, 28...Gear, 12...Second lens barrel, L1 to L3...First to third group lenses, 13
, 14...First group, second group lens frame, 18...Compression spring, 20...Cam member, 25...Drive shaft, 2
7...Feed screw.

Claims

[Scope of utility model registration request]

a first lens barrel that is moved in the optical axis direction by rotation of the rotational drive source; and a second lens barrel supported by the first lens barrel and moved in the optical axis direction by rotation of the rotational drive source. , the first forming the zoom lens optical system
A first group lens frame is provided in the front part of the second lens barrel in which a group lens is supported, and a second group lens frame forming a zoom lens optical system is supported and in the second lens barrel. A second group lens frame is provided behind the first group lens frame and is movable in the optical axis direction, and the second group lens frame is rotated by the rotational drive source and engaged with the second group lens frame, and maintaining a zoom movement distance interval of the second group lens frame with respect to the first group lens frame in a predetermined relationship;
1. A zoom lens barrel comprising: a cam member having a cam surface for holding the second group lens frame in a storage position when the lens barrel is retracted from a zooming area to a storage area.