JPH01130107U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の実施例を示し、第１図はズーム
レンズ鏡胴の断面図、第２図は第１図上のＡ―Ａ
線に沿つて同ズームレンズ鏡胴を切断した断面図
、第３図は同ズームレンズ鏡胴の分解斜視図、第
４図はカム筒の展開図、第５図は移動筒の後端面
に支持させたレンズ支持枠の止着構造を示す部分
的な断面図、第６図は移動筒の部分的な後面図、
第７図は広角位置から望遠位置に移行した状態を
示す上記ズームレンズ鏡胴の断面図である。 １１…固定筒、１１ａ，１１ｂ…案内溝、１１
ｃ，１１ｄ…切欠孔、１１ｇ…凹条溝、１２…移
動筒、１２ａ，１２ｂ…案内孔、１２ｅ…凸条部
、１２ｆ…ねじ孔、１３…移動枠、１３ａ，１３
ｂ…円曲面部、１３ｅ，１３ｆ…凹条溝、１４…
カム筒、１４ｇ…歯車部、１７ａ，１７ｂ…カム
フオロア、２６ａ，２６ｂ…カムフオロア、３１
，３２…一方側カム孔、３３，３４…他方側カム
孔。 The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of a zoom lens barrel, and FIG. 2 is a cross-sectional view taken along A-A in FIG.
A cross-sectional view of the zoom lens barrel taken along a line, FIG. 3 is an exploded perspective view of the zoom lens barrel, FIG. 4 is an exploded view of the cam barrel, and FIG. 5 is a movable barrel supported on the rear end surface. FIG. 6 is a partial rear view of the movable barrel;
FIG. 7 is a cross-sectional view of the zoom lens barrel showing a state shifted from the wide-angle position to the telephoto position. 11... Fixed tube, 11a, 11b... Guide groove, 11
c, 11d...Notch hole, 11g...Concave groove, 12...Moving tube, 12a, 12b...Guide hole, 12e...Protruding strip, 12f...Screw hole, 13...Moving frame, 13a, 13
b...Circular curved surface portion, 13e, 13f...Concave groove, 14...
Cam cylinder, 14g... Gear part, 17a, 17b... Cam follower, 26a, 26b... Cam follower, 31
, 32... one side cam hole, 33, 34... other side cam hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] カム筒のカム面に対接させたカムフオロアを備
えた移動筒がカム筒の回動に連動されて固定筒に
沿つて移動し、この移動筒に支持された光学系を
位置変化させて光学的に変倍する構成のズームレ
ンズ鏡胴において、固定筒の周囲に移動筒を、こ
の移動筒の周囲にカム筒を各々重合すると共に、
固定筒外面には光学系の光軸方向に沿つた凹条溝
を、移動筒内面には上記凹条溝に摺動自在に嵌合
する筒端間に延びる凸条部を各々設け、かつ、上
記凸条部が位置する移動筒端面にレンズ支持枠を
止着する構成としたことを特徴とするズームレン
ズ鏡胴。 A movable barrel equipped with a cam follower that is in contact with the cam surface of the cam barrel moves along the fixed barrel in conjunction with the rotation of the cam barrel, and changes the position of the optical system supported by this movable barrel to perform optical In a zoom lens barrel configured to change magnification, a movable barrel is superimposed around a fixed barrel, and a cam barrel is superimposed around this movable barrel, and
The outer surface of the fixed cylinder is provided with a concave groove along the optical axis direction of the optical system, and the inner surface of the movable cylinder is provided with a convex groove that extends between the ends of the cylinder and slidably fits into the groove, and A zoom lens barrel characterized in that a lens support frame is fixed to the end surface of the movable barrel where the protruding stripes are located.