JPS6368617U - - Google Patents

Description

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

図面は本考案の一実施例を示し、第１図はズー
ムレンズ鏡胴の縦断側面図、第２図は同ズームレ
ンズ鏡胴の横断平面図、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図は移動筒とカム筒を省略した第１図上のＡ―
Ａ線縮小断面図、第６図は固定枠の部分的な斜視
図、第７図は第１図上のＡ―Ａ線縮小断面図、第
８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縦断側面図である。 １１……固定枠、１１ａ，１１ｂ……案内溝、
１１ｃ，１１ｄ……切欠孔、１２……移動筒、１
２ａ，１２ｂ……案内孔、１３……移動枠、１３
ａ，１３ｂ……円曲面部、１４……カム筒、１４
ａ〜１４ｄ……フランジ部、１４ｅ……歯車部、
１４ｆ，１４ｇ……凸状部、１７ａ，１７ｂ……
カムフオロア、２６ａ，２６ｂ……カムフオロア
、３１，３２……一方側カム、３３，３４……他
方側カム。 The drawings show an embodiment of the present invention; FIG. 1 is a vertical cross-sectional side view of the zoom lens barrel, FIG. 2 is a cross-sectional plan view of the zoom lens barrel, and FIG. 3 is an exploded perspective view of the zoom lens barrel. Figure 4 is an exploded view of the cam cylinder, and Figure 5 is A-- in Figure 1 with the movable cylinder and cam cylinder omitted.
6 is a partial perspective view of the fixed frame, FIG. 7 is a reduced sectional view taken along line A-A in FIG. 1, and FIG. 8 shows the state transitioned from the wide-angle position to the telephoto position. FIG. 3 is a longitudinal sectional side view of the zoom lens barrel shown in FIG. 11... fixed frame, 11a, 11b... guide groove,
11c, 11d...Notch hole, 12...Moving tube, 1
2a, 12b... Guide hole, 13... Moving frame, 13
a, 13b...Circular curved surface portion, 14...Cam cylinder, 14
a to 14d...flange part, 14e...gear part,
14f, 14g... Convex portion, 17a, 17b...
Cam follower, 26a, 26b... Cam follower, 31, 32... One side cam, 33, 34... Other side cam.

Claims (1)

【実用新案登録請求の範囲】 (1) カム筒のカム面に対接させたカムフオロア
を備えた移動枠が、固定枠に案内されながらカム
筒の回動に連動されて移動し、この移動枠に支持
されたレンズ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、上記カム筒が
、一端から筒軸方向に切り込み形成した形状で、
切り込み縁壁をカム面とした一方側カムと、その
他端から筒軸方向に切り込み形成した形状をなし
、上記一方側カムに対して筒周囲位置を変えて形
成し、切り込み縁壁をカム面とした他方側カムと
を備えることを特徴とするズームレンズ鏡胴のカ
ム筒。 (2) 上記カム筒が、筒状体の一端周縁の等間隔
位置から筒軸方向に沿つて切り込み形成した形状
の複数の一方側カムと、その筒状体の他端周縁か
ら上記一方側カムの各々の間に切り込み形成した
形状の複数の他方側カムとを備える実用新案登録
請求の範囲第(1)項に記載したズームレンズ鏡胴
のカム筒。[Claims for Utility Model Registration] (1) A movable frame equipped with a cam follower placed in contact with the cam surface of the cam barrel moves in conjunction with the rotation of the cam barrel while being guided by a fixed frame. In a zoom lens barrel configured to optically change magnification by changing the position of a lens supported by the cam barrel, the cam barrel has a shape in which a cut is formed from one end in the direction of the barrel axis,
One side cam has a cut edge wall as a cam surface, and a cut is formed from the other end in the cylinder axis direction, and the cylinder peripheral position is changed from the above one side cam, and the cut edge wall is a cam surface. A cam barrel for a zoom lens barrel, comprising: a cam on the other side of the zoom lens barrel; (2) The cam cylinder includes a plurality of one-side cams each having a shape in which cuts are formed along the cylinder axis direction from equally spaced positions on the periphery of one end of the cylindrical body, and the one-side cam from the periphery of the other end of the cylindrical body. 2. A cam barrel for a zoom lens barrel as set forth in claim (1) of the utility model registration claim, comprising: a plurality of other-side cams having a shape in which cuts are formed between each of the cams;