JPS63113109U

JPS63113109U -

Info

Publication number: JPS63113109U
Application number: JP435387U
Authority: JP
Priority date: 1987-01-14
Filing date: 1987-01-14
Publication date: 1988-07-21
Anticipated expiration: 2002-01-14
Also published as: JPH0614175Y2

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
図はカムフオロア部分を拡大して示した第１図上
の部分的な拡大図、第９図は変形例を示す第８図
同様の拡大図、第１０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、第１１図は他の実施例を示す第４図同
様のカム筒の展開図、第１２図は第１１図に示す
カム筒を組付けた状態のカムフオロア部分を示す
第８図同様の拡大図である。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，１４ｂ……被板部、１４ａ_１，１４ｂ_１……
カム面平行壁、１４ｃ，１４ｄ……フランジ部、
１４ｅ……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; FIG. 1 is a longitudinal 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 a developed view of the cam cylinder, and Figure 5 is a developed view of the cam cylinder.
The figure is A-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 the line A--A in FIG. 1, and FIG.
The figure is a partial enlarged view of the cam follower part shown in Figure 1, Figure 9 is an enlarged view similar to Figure 8 showing a modified example, and Figure 10 is a state shifted from the wide-angle position to the telephoto position. FIG. 11 is a developed view of the cam barrel similar to FIG. 4 showing another embodiment, and FIG. 12 is a side view of the zoom lens barrel with the cam barrel shown in FIG. 11 assembled. FIG. 9 is an enlarged view similar to FIG. 8 showing a cam follower portion. 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, 14b...covered part, 14a ₁ , 14b ₁ ...
Cam surface parallel wall, 14c, 14d...flange part,
14e...Gear portion, 17a, 17b...Cam follower, 26a, 26b...Cam follower, 31,
32... Cam hole on one side, 33, 34... Cam hole on the other side.

Claims

【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、一端から筒軸
方向に切り込み形成した形状で、切り込み縁壁部
をカム面とした一方側カム孔と、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
側カム孔に対して筒周囲位置を変えて形成し、切
り込み縁壁部をカム面とした他方側カム孔とを有
するカム筒を設け、かつ、このカム筒の周囲には
一方側カム孔及び他方側カム孔の両方またはそれ
らの一方を被う被板部を設けると共に、この被板
部の一部にカム面に圧接する上記カムフオロアと
接近させたカム面平行壁を形成したことを特徴と
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孔と、その筒状体の他端周縁
から上記一方端カム孔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孔とを備えると共に
、一方側カム孔及び他方側カム孔の両方またはこ
れら一方に被板部を設けた実用新案登録請求の範
囲第(1)項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 the magnification by changing the position of a lens supported by a lens, a cam hole on one side is formed with a cut in the direction of the cylinder axis from one end, and the edge wall of the cut is a cam surface. , a cam cylinder having a shape in which a cut is formed from the other end in the direction of the cylinder axis, and a cam hole on the other side is formed at a different position around the cylinder with respect to the cam hole on the one side, and the cam hole on the other side has a cut edge wall portion as a cam surface. is provided, and a covering part is provided around the cam cylinder to cover both or one of the cam holes on one side and the cam hole on the other side, and a part of this covering part is pressed against the cam surface. A cam barrel for a zoom lens barrel, characterized in that a wall parallel to the cam surface is formed close to the cam follower. (2) The cam cylinder has a plurality of one side cam holes formed by cutting along the cylinder axis direction from equally spaced positions on the periphery of one end of the cylindrical body, and from the periphery of the other end of the cylindrical body to the one end of the cylindrical body. Claims for registration of a utility model, which includes a plurality of cam holes on the other side having a shape in which cuts are formed between each cam hole, and a covered portion is provided on both or one of the cam holes on the one side and the cam hole on the other side. The cam barrel of the zoom lens barrel described in paragraph (1).