JPS59131703U - Lens barrel feeding device - 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 the drawing]

第１図は従来のレンズ鏡筒の一例を示す正面図である。 第２図〜第５図は本考案の一実施例を示し、第２図は正
面半断面図、第３図はその要部拡大部、第４図は正面図
、第５図は絞り駆動板の斜視図である。 〔主要部分の符号の説明〕、２２・・・・・・固定鏡筒
、２４・・・・・・光学系保持鏡筒、２６・・・・・・
繰出環、２８・・・・・・ピン、３２・・・・・・らせ
んみぞ。 ８　６２　４ ｔｔ　　　　　　１−　　　　　１FIG. 1 is a front view showing an example of a conventional lens barrel. Figures 2 to 5 show an embodiment of the present invention, with Figure 2 being a front half-sectional view, Figure 3 being an enlarged view of its main parts, Figure 4 being a front view, and Figure 5 being a diaphragm drive plate. FIG. [Description of symbols of main parts], 22...Fixed lens barrel, 24...Optical system holding lens barrel, 26...
Feeding ring, 28...pin, 32...spiral groove. 8 62 4 tt 1- 1

Claims (1)

【実用新案登録請求の範囲】 １　固定鏡筒と、光軸まわりに回動可能とされた繰出環
と、光軸方向に移動可能とされた光学系保持鏡筒とを含
み、繰出環を回動操作することによって保持部材を光軸
方向に移動させるようになっているレンズ鏡筒において
、 前記光学系保持鏡筒を光軸方向に移動可能かつ光軸まわ
りに回動可能とし、該保持鏡筒と前記繰出環との間に連
動機構を請けて、該繰出環の回動操作に伴ない保持鏡筒
は光軸まわりに回動しつつ光軸方向に移動するようにし
たことを特徴とするレンズ鏡筒の繰出装置。 ２　前記固定鏡筒、繰出環及び光学系保持部材は、固定
鏡筒を間にして外側に繰出環が、内側に保持鏡筒が配置
され、固定鏡筒に形成されたらせんみそと、保持鏡筒に
立設され該らせんみぞを貫通後繰出環に連結されたピン
とによって前記連動機構が構成されている実用新案登録
請求の範囲第１項に記載のレンズ鏡筒の繰出装置。 ３　前記保持鏡筒には、移動部材が、該保持鏡筒と光軸
方向には一体的に移動するが、保持鏡筒が光軸まわりに
回動してもこれに連れ回らないように取り付けられ、か
つ該移動部材は固定鏡筒との間に掛は渡された付勢部材
によって光軸方向の一方向に付勢されている実用新案登
録請求の範囲第２項に記載のレンズ鏡筒の繰出装置′。 　　−４前記光学系保持鏡筒は可変絞り機構部を有し、
かつ固定鏡筒に固定されて絞り径を調整する絞り調整板
はらせん形状とされている実用新案登録請求の範囲第２
項に記載のレンズ鏡筒の繰出装置。[Claims for Utility Model Registration] 1. Includes a fixed lens barrel, a feeding ring that is rotatable around the optical axis, and an optical system holding lens barrel that is movable in the direction of the optical axis. In the lens barrel in which the holding member is moved in the optical axis direction by a mechanical operation, the optical system holding barrel is movable in the optical axis direction and rotatable around the optical axis, and the holding member is An interlocking mechanism is provided between the barrel and the feeding ring, so that the holding lens barrel rotates around the optical axis and moves in the optical axis direction as the feeding ring rotates. A device for feeding out the lens barrel. 2. The fixed lens barrel, the extending ring, and the optical system holding member are arranged such that the extending ring is arranged on the outside with the fixed lens barrel in between, and the holding lens barrel is arranged on the inside, and the spiral groove formed on the fixed lens barrel and the holding mirror are arranged in the fixed lens barrel. 2. The lens barrel feeding device according to claim 1, wherein the interlocking mechanism is constituted by a pin which is provided upright in the tube and is connected to the feeding ring after passing through the spiral groove. 3. The moving member is attached to the holding lens barrel so that it moves integrally with the holding lens barrel in the optical axis direction, but does not rotate with the holding lens barrel when it rotates around the optical axis. and the movable member is biased in one direction in the optical axis direction by a biasing member disposed between the movable member and the fixed lens barrel. feeding device′. -4 The optical system holding lens barrel has a variable diaphragm mechanism,
In addition, the aperture adjusting plate fixed to the fixed lens barrel and adjusting the aperture diameter has a spiral shape.
The lens barrel feeding device described in 2.