JPS612611U

JPS612611U - Focal plane adjustment device for zoom lens barrel

Info

Publication number: JPS612611U
Application number: JP8497484U
Authority: JP
Inventors: 英夫菅野
Original assignee: 株式会社ニコン
Priority date: 1984-06-08
Filing date: 1984-06-08
Publication date: 1986-01-09

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図は本考案の実施例を示す断面図、第２図は本考案
の要部をなす第１図のズーミング筒、固定鏡筒およびキ
ー部材を示す平面展開図、第３図は第１図中のキー部材
の平面図、第４図は第３図のＣ二Ｃ拡大断面図ミ第５図
は第１図のＡ−Ａ断面図、第６図は第５図のＢ−Ｂ断面
図、第７図は第１図のズーミング筒番移動させるための
偏心ドライバーの使用法説明図そある。〔主！部分φ符号の説明〕、２・・・フォー力シング操
作環（フォーカシング操作部材）、６・・・固定鏡筒、
９・・・ズーミング筒、１２・・・摺動溝、１３・・・
摺呻キー（キー部材）、２５・・・ズーミング操作環（
ズーミング操作部材）、ＬＬ，Ｌ２９Ｌ′３，ｔ，
・・・移動レンズ1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a developed plan view showing the zooming barrel, fixed lens barrel, and key member of FIG. A plan view of the key member in the figure, FIG. 4 is an enlarged sectional view of C2C in FIG. 3, FIG. 5 is a sectional view taken along line A-A in FIG. 7 are explanatory diagrams of how to use the eccentric driver for moving the zooming cylinder number shown in FIG. 1. 〔main! Explanation of part φ symbols], 2...Forcing operation ring (focusing operation member), 6...Fixed lens barrel,
9...zooming tube, 12...sliding groove, 13...
Sliding key (key member), 25...zooming operation ring (
zooming operation member), LL, L29 L'3, t,
...moving lens

Claims

[Scope of utility model registration request]

(1) In a zoom lens that performs focusing by moving part of a plurality of movable lenses that move in accordance with the rotation of a zooming operation member in the optical axis direction with the rotation of a focusing operation member, a sliding groove that is long in the circumferential direction is used. and a zooming barrel which is rotated by the zooming operation member and is provided so as to be rotatable seven times with respect to the fixed lens barrel, and a key member that engages with the sliding groove is fixed to the fixed lens barrel, and the key member is fixed to the fixed lens barrel. By displacing the mounting position of the key member in the optical axis direction, the plurality of movable lenses can be finely adjusted in the optical axis direction without relative displacement. 1. A focal plane adjustment device for a zoom lens mirror, characterized in that it is configured to be adjustable.

(2) The key member 13 has a countersunk screw hole in the center of the sliding groove 17 formed parallel to both side surfaces that contact the sliding groove 12, and is screwed into the countersunk screw hole 16. The focal plane adjustment device for a zoom lens barrel according to claim 1, wherein the width W of the focal plane adjustment device is adjustable by means of mating countersunk screws 15.

(3) The zooming tube 9 is connected to the sliding groove 12 and the first moving lens group L1, l, ! on the front side among the front moving lenses u L2, L3, L4. and a second cam groove 9' that moves the rear second movable lens groups L3 and L4, and the first movable lens groups Li and L2 move the focusing operation member. The zoom lens barrel focal plane adjusting device according to claim 1, wherein the zoom lens barrel focal plane adjusting device is configured to be further moved in accordance with the rotation of the zoom lens barrel.