JPS6133010U - zoom lens barrel - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図はこの考案の実施例の半断面側面図。 第２図は構成部品の部分的分解斜視図。 図中、１・・・固定鏡筒、ｌａｗ ｉｂ，ｌｃ・・・
直線みぞ、２，３・・・レンズ枠、４・・・カム筒、４
ａ，４ｂ・・・湾曲カム孔、４ｃ・・・傾斜カム孔、５
・・・スライドｉ、５ａ・・・雄ヘリコイド、５ｂｔ５
ｃ・・・ピン、６・・・フォーカスリング、７・・・ズ
ームリング、９・・・基準線。FIG. 1 is a half-sectional side view of an embodiment of this invention. FIG. 2 is a partially exploded perspective view of the components. In the figure, 1... fixed lens barrel, law ib, lc...
Straight groove, 2, 3... Lens frame, 4... Cam tube, 4
a, 4b...Curved cam hole, 4c...Slanted cam hole, 5
...Slide i, 5a...male helicoid, 5bt5
c...Pin, 6...Focus ring, 7...Zoom ring, 9...Reference line.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ズームリング７の回転により複数のレンズ枠を移動させ
てズーミングを行う式のズームレンズ鏡胴において、固
定鏡筒１を一重のものとしてその周面に複数の光軸に平
行な直線みぞｌａ，ｌｂ，１ｃを設け、その外側には上
記直線みぞ１ａ，１ｂ，１ｃとそれぞれ交差重合する湾
曲カム孔４ａ，４ｂおよび傾斜カム孔４Ｃを有し前記ズ
ームリング７と一体にしたカム筒４を回転するように嵌
，合し、該カム筒４の外側には前端部上面と下面にピン
５ｂ，５ｃを有すると共に後半部周面に光軸に平行な基
準線９を設けたスライド筒５を摺動ずるように嵌合し、
上面のピン５ｂはスライド筒５の前端部に螺合したフォ
ーカスリング６の内面切欠部６ａに係合させ、下面のピ
ン５ｃはカム筒４の傾斜カム孔４ｃおよび固定鏡筒１の
直線みぞ１ｃに係合させてなるズームレンズの鏡筒。In a zoom lens barrel that performs zooming by moving a plurality of lens frames by rotating a zoom ring 7, the fixed lens barrel 1 is made into a single layer, and a plurality of linear grooves la, lb are formed on the circumferential surface of the lens barrel parallel to the optical axes. , 1c, and has curved cam holes 4a, 4b and an inclined cam hole 4C on the outside thereof, which cross overlap with the linear grooves 1a, 1b, 1c, respectively, and rotates the cam cylinder 4 integrated with the zoom ring 7. The slide cylinder 5 has pins 5b and 5c on the upper and lower surfaces of the front end and a reference line 9 parallel to the optical axis on the circumferential surface of the rear half of the cam cylinder 4. Fits snugly,
The pin 5b on the top surface is engaged with the inner notch 6a of the focus ring 6 screwed onto the front end of the slide barrel 5, and the pin 5c on the bottom surface is engaged with the inclined cam hole 4c of the cam barrel 4 and the linear groove 1c of the fixed lens barrel 1. A zoom lens barrel that is engaged with a lens.