JPH0235110U

JPH0235110U -

Info

Publication number: JPH0235110U
Application number: JP11336188U
Authority: JP
Priority date: 1988-08-31
Filing date: 1988-08-31
Publication date: 1990-03-07
Anticipated expiration: 2003-08-31
Also published as: JPH0723766Y2

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示し、第１図は第２
図上のＢ−Ｂ線に沿つて切断したズームレンズ鏡
胴の断面図、第２図は第１図上のＡ−Ａ線に沿つ
て切断して同ズームレンズ鏡胴の断面図、第３図
は第２図上のＣ−Ｃ線に沿つて切断した同ズーム
レンズ鏡胴の上半部分の断面図、第４図は同ズー
ムレンズ鏡胴の分解斜視図、第５図ａはズーミン
グ用カム筒の前面を示す簡略図、第５図ｂは同カ
ム筒の後面を示す簡略図、第６図ａは焦点整合用
カム筒の前面を示す簡略図、第６図ｂは同カム筒
の後面を示す簡略図、第７図はばね受枠を移動筒
に固着するねじ止め構造を示す部分図、第８図は
ズーミングの動作を示す部分断面図、第９図は焦
点の整合動作を示す部分断面図である。１１……固定枠、１２……移動筒、１２ａ，１
２ｂ……凸条部、１３……ズーミング用のカム筒
、１３ａ……第１のカム孔、１３ｂ……第２のカ
ム孔、１３ｄ……弧状細孔、１３ｅ……切込溝、
１４……焦点整合用のカム筒、１４ａ……カム孔
、１４ｃ……弧状細孔、１４ｄ……切込溝、１５
……第１移動枠、１６……第２移動枠、１８ａ，
１８ｂ，１８ｃ……カムフオロア、２１ｃ……ス
トツパー、２３ａ，２３ｂ，２３ｃ……カムフオ
ロア、２６ａ，２６ｂ，２６ｃ……カムフオロア
、２８……プログラムレンズシヤツタ、３０ｃ…
…ストツパー。 The drawings show one embodiment of the present invention, and FIG.
2 is a cross-sectional view of the zoom lens barrel taken along line B-B in the figure; FIG. 2 is a cross-sectional view of the zoom lens barrel taken along line A-A in FIG. 1; The figure is a sectional view of the upper half of the zoom lens barrel taken along line C-C in Figure 2, Figure 4 is an exploded perspective view of the zoom lens barrel, and Figure 5a is for zooming. FIG. 5b is a simplified diagram showing the rear surface of the cam barrel, FIG. 6a is a simplified diagram showing the front surface of the focusing cam barrel, and FIG. 6b is a simplified diagram showing the front surface of the cam barrel. A simplified view showing the rear surface, FIG. 7 is a partial view showing the screwing structure for fixing the spring receiving frame to the movable tube, FIG. 8 is a partial cross-sectional view showing the zooming operation, and FIG. 9 is a partial view showing the focus alignment operation. FIG. 11... fixed frame, 12... movable cylinder, 12a, 1
2b... Convex strip, 13... Cam cylinder for zooming, 13a... First cam hole, 13b... Second cam hole, 13d... Arc-shaped pore, 13e... Cut groove,
14... Cam barrel for focusing, 14a... Cam hole, 14c... Arc-shaped pore, 14d... Cut groove, 15
...First moving frame, 16... Second moving frame, 18a,
18b, 18c...Cam follower, 21c...Stopper, 23a, 23b, 23c...Cam follower, 26a, 26b, 26c...Cam follower, 28...Program lens shutter, 30c...
…stopper.

Claims

[Scope of utility model registration request]

A second cam frame is connected to a zooming moving frame that moves in the optical axis direction in conjunction with the first cam frame, and is connected to the zooming moving frame so that it can rotate around the optical axis and move together in the optical axis direction. and moving the focusing moving frame in the optical axis direction in conjunction with the second cam frame,
A zoom lens barrel characterized in that the focusing moving frame is provided with a program lens shutter in addition to an optical system, and the shutter is displaced in the optical axis direction during zooming and focusing operations.