JPH0255224U

JPH0255224U -

Info

Publication number: JPH0255224U
Application number: JP13496088U
Authority: JP
Priority date: 1988-10-15
Filing date: 1988-10-15
Publication date: 1990-04-20

Description

[Brief explanation of drawings]

第１図は本考案の１実施例に係るレンズシヤツ
タ機構を示す縦断面図、第２図は地板と後側プレ
ートの間の斜視組立図、第３図は後側プレートを
被写体側から見た平面図、第４図は前側プレート
及び後側プレートの部分を第３図の矢示Ａ方向に
切断した断面図、第５図は本考案の動作タイミン
グを示すタイムチヤート。１……地板、２……カバープレート、３……ガ
イドポール、４……前側プレート、４ａ……前玉
レンズ群、５……後側プレート、５ａ……後玉レ
ンズ群、６……レンズ駆動モータ、７……カムリ
ング、７ａ……カム面、８，９……シヤツタ羽根
、１１……開閉レバー、１３……開口防止ボス、
２０……ＡＦリング、２０ａ……ギア、２０ｂ…
…カムフオロア。 Fig. 1 is a vertical cross-sectional view showing a lens shutter mechanism according to an embodiment of the present invention, Fig. 2 is a perspective assembly diagram between the main plate and the rear plate, and Fig. 3 is a plane view of the rear plate as viewed from the subject side. 4 is a sectional view of the front plate and the rear plate taken in the direction of arrow A in FIG. 3, and FIG. 5 is a time chart showing the operation timing of the present invention. 1... Main plate, 2... Cover plate, 3... Guide pole, 4... Front plate, 4a... Front lens group, 5... Rear plate, 5a... Rear lens group, 6... Lens. Drive motor, 7... cam ring, 7a... cam surface, 8, 9... shutter blade, 11... opening/closing lever, 13... opening prevention boss,
20...AF ring, 20a...gear, 20b...
...Come after you.

Claims

[Claims for Utility Model Registration] (1) In a camera in which focus is adjusted by moving all or at least some of the lens groups constituting the lens system in the optical axis direction, the moving lens group and a lens shutter mechanism that integrally moves in the optical axis direction, at least one movement limit of the moving range of the moving lens group is set outside the effective focus adjustment range, and the moving lens group is positioned outside the effective focus adjustment range. 1. A mechanism for preventing an opening of a shutter, characterized in that a protrusion that engages the opening/closing member of the lens shutter mechanism in a closed position when the shutter is opened is disposed at a fixed position with respect to a camera body. (2) In an automatic focusing camera that adjusts the focus by moving all or at least some of the lens groups constituting the lens system from the origin position in the optical axis direction in a step before the exposure operation, the above-mentioned movement is performed. A lens shutter mechanism that moves integrally with the lens group in the optical axis direction, the origin position of the moving lens group is set outside the effective focus adjustment range, and when the moving lens group is located at the origin position, the lens shutter mechanism A shutter characterized in that a protruding part that engages the opening/closing member in the closed position is arranged at a fixed position with respect to the camera body, and returns the moving lens group to the original position at the end of photographing. Opening prevention mechanism.