JPH0442611U

JPH0442611U -

Info

Publication number: JPH0442611U
Application number: JP8326990U
Authority: JP
Priority date: 1990-08-08
Filing date: 1990-08-08
Publication date: 1992-04-10

Description

[Brief explanation of the drawing]

第１図は本考案に係るレンズ鏡筒の一実施例を
示す要部拡大断面図、第２図は第１図における
−線断面図、第３図は第１図に示すレンズ鏡筒
のズーミング動作を行つた別の状態を示す要部拡
大断面図、第４図は第３図における−線断面
図、第５図は従来例を示す要部拡大断面図、第６
図はその−線断面図である。１……レンズ鏡筒、２……固定筒、３……ズー
ム操作環、４……移動筒、５……固定レンズ群保
持部材、６……ズーミングレンズ群保持部材、８
……カム筒、１１……絞り制御板、１３……貫通
穴、１４……絞り制御レバー、１５……遮光筒体
、１６……筒状空隙、１７……絞り連動レバー、
１８……開口穴、１９……溝状開口、２０……仕
切壁部、２１……空間部。 FIG. 1 is an enlarged cross-sectional view of essential parts showing an embodiment of the lens barrel according to the present invention, FIG. 2 is a cross-sectional view taken along the - line in FIG. 1, and FIG. 3 is a zooming view of the lens barrel shown in FIG. 1. FIG. 4 is an enlarged cross-sectional view of the main part showing another state in which the operation is performed; FIG. 4 is a cross-sectional view taken along the line - - in FIG. 3; FIG.
The figure is a sectional view taken along the - line. DESCRIPTION OF SYMBOLS 1... Lens barrel, 2... Fixed barrel, 3... Zoom operation ring, 4... Movable barrel, 5... Fixed lens group holding member, 6... Zooming lens group holding member, 8
...cam cylinder, 11 ... aperture control plate, 13 ... through hole, 14 ... aperture control lever, 15 ... light-shielding cylinder, 16 ... cylindrical gap, 17 ... aperture interlocking lever,
18...Opening hole, 19...Groove opening, 20...Partition wall portion, 21...Space portion.

Claims

[Claims for Utility Model Registration] A holding member that holds a fixed lens group in a part of the fixed cylinder and a holding member that is disposed opposite to each other on the rear side in the optical axis direction so as to form a cylindrical gap within the fixed cylinder. A through hole is opened in a portion of the holding member facing the cylindrical gap, facing substantially in the optical axis direction, and at least a part of the light shielding member is provided with a through hole on the outer peripheral side thereof. In a lens barrel in which an opening penetrating from the cylindrical gap to the inner circumferential side is bored, a part of the cylindrical gap facing the through hole on the holding member side is bored in the light shielding cylinder side in the circumferential direction. a partition wall extending in the optical axis direction so as to be defined from the opening, from a portion close to the through hole to at least a range beyond the perforated portion of the opening;
A lens barrel characterized in that it is provided substantially along the optical axis direction.