JPH0235109U

JPH0235109U -

Info

Publication number: JPH0235109U
Application number: JP11210288U
Authority: JP
Priority date: 1988-08-29
Filing date: 1988-08-29
Publication date: 1990-03-07

Description

[Brief explanation of drawings]

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、１２ｃ……ヘリコイドねじ、１
２ｄ……シフト出し調整用の長孔、１３……ズー
ミング用のカム筒、１３ａ……第１のカム孔、１
３ｂ……第２のカム孔、１３ｄ……弧状細孔、１
４……焦点整合用のカム筒、１４ａ……カム孔、
１４ｃ……弧状細孔、１５……第１移動枠、１６
……第２移動枠、１８ａ，１８ｂ，１８ｃ……カ
ムフオロア、１９……セル枠、１９ａ……ヘリコ
イドねじ、１９ｂ……固定用のタツプ、２３ａ，
２３ｂ，２３ｃ……カムフオロア、２６ａ，２６
ｂ，２６ｃ……カムフオロア。 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, 12c... Helicoid screw, 1
2d...Long hole for shift adjustment, 13...Cam cylinder for zooming, 13a...First cam hole, 1
3b...second cam hole, 13d...arc-shaped pore, 1
4... Cam barrel for focusing, 14a... Cam hole,
14c... Arc-shaped pore, 15... First moving frame, 16
... Second moving frame, 18a, 18b, 18c... Cam follower, 19... Cell frame, 19a... Helicoid screw, 19b... Fixing tap, 23a,
23b, 23c...cam follower, 26a, 26
b, 26c... cam follower.

Claims

[Scope of utility model registration request]

In a zoom lens barrel configured to perform optical magnification and focusing control by moving multiple movable frames that support the optical system in the optical axis direction, a helicoid screw is formed on the inner surface of the tip of one movable frame. At the same time, this movable frame is provided with a long hole that extends in the circumferential direction along the thread slope of the helicoid screw, and on the other hand, a tap corresponding to the helicoid screw and the above-mentioned long hole is provided around the support frame of a specific optical system. and connect the support frame to the movable frame with a helicoid screw, and at the position adjusted by shifting by rotating the support frame according to the helicoid screw, screw the small screw inserted through the long hole into the tap, and then tighten the optical system. A zoom lens barrel characterized by being fixed to a moving frame.