JPH0255225U

JPH0255225U -

Info

Publication number: JPH0255225U
Application number: JP13496188U
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……羽根押えボス、
２０……ＡＦリング、２０……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... blade presser boss,
20...AF ring, 20...gear, 20b...
Came follower.

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, a plurality of shutter blades and a pair of plate members arranged before and after the plurality of shutter blades in the optical axis direction at a distance that does not impede the travel of the shutter blades, and move integrally with the moving lens group in the optical axis direction. A lens shutter mechanism is provided, the movement limit of at least one of the moving ranges of the moving lens group is set outside the effective focus adjustment range, and when the moving lens group is located outside the effective focus adjustment range, Penetrating the plate member outside the effective focus adjustment range and abutting the shutter blade furthest outside the effective focus adjustment range among the plurality of shutter blades to direct the shutter blade toward the other plate member of the pair of plate members. A light leakage prevention mechanism for a shutter, characterized in that a protruding part that is pressed by the shutter is arranged 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 that make up the lens system from the origin position in the optical axis direction in the pre-exposure operation, multiple shutters are used. a pair of plate members disposed before and behind the plurality of shutter blades in the optical axis direction at a distance that does not impede the movement of the shutter blades, and integrally with the moving lens group in the optical axis direction a lens shutter mechanism that moves the lens shutter mechanism, 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 plate member on the origin side of the pair of plate members is moved. A protruding portion that penetrates and comes into contact with a shutter blade closest to the origin of the plurality of shutter blades to press the shutter blade toward the other one of the pair of plate members is fixed to the camera body. A mechanism for preventing light leakage of the shutter, which is characterized by being arranged in a position that allows the shutter to prevent light leakage.