公开(公告)号：US3667365A

公开(公告)日：1972-06-06

申请号：US3667365D

申请日：1969-03-21

申请人： RICOH KK

发明人： FUJIMOTO SAKAE ,  IMAI TADAYUKI

IPC分类号： G03B7/20 ,  G03B17/14 ,  G03B3/00

CPC分类号： G03B7/20 ,  G03B17/14

摘要： A device for compensating positional deviations in screwing interchangeable lenses into a single-lens reflex camera by means of an aperture setting ring including a pin mounted in a slot to determine its angular movement. A barrel lens has a hook element engagable with a notched area on the aperture setting ring. The hook element is mounted to have less angular movement than the aperture setting ring so that positive engagement is always provided within the range of movement of the barrel lens.

摘要翻译： 用于补偿通过孔安装环将可互换镜头旋入单透镜反光相机中的位置偏差的装置，该孔径设置环包括安装在槽中的销以确定其角度运动。 镜头镜头具有可与孔径设定环上的凹口区域接合的钩形元件。 钩元件被安装成具有比孔设置环更少的角度运动，使得在镜头镜头的运动范围内始终提供正接合。

公开(公告)号：US3685419A

公开(公告)日：1972-08-22

申请号：US3685419D

申请日：1971-05-17

申请人： RICOH KK

发明人： IMAI TADAYUKI

IPC分类号： G03B7/00 ,  G03B7/12 ,  G03B7/20 ,  G03B17/14

CPC分类号： G03B7/20 ,  G03B7/006 ,  G03B7/12 ,  G03B17/14

摘要： A ring for coupling an exposure meter to an aperture stop control means is disposed on the body of a single-lens reflex camera employing the screw-in type interchangeable lenses and is rotatable about the optical axis of the lens, and a clutch lever is rotatably fixed to this coupling ring. The free end of the clutch lever engages with a projection of a shutter release lever in such a way that the clutch lever is normally moved away from a horizontal coupling arm of an aperture stop control ring which is disposed in the lens and is provided with an aperture stop control cam, so long as the shutter release lever is not depressed or moved downwardly. Therefore, when the lens is mounted, the horizontal coupling arm will not engage with the clutch lever, so that the lens may be mounted and dismounted freely. Upon depression of the shutter release lever, the clutch lever moves into mechanical or frictional engagement with the coupling arm, and when the shutter release lever is further depressed the coupling ring is rotated through an angle corresponding to the angle of displacement of the pointer of the exposure meter so that the clutch lever rotates the control ring in unison with the coupling ring.

摘要翻译： 用于将曝光仪耦合到孔径光阑控制装置的环设置在使用螺旋式可互换镜头的单镜头反光相机的主体上，并且可围绕透镜的光轴旋转，并且离合器杆可旋转 固定在该联轴器环上。 离合器杆的自由端与快门释放杆的突起接合，使得离合器杆通常移动远离设置在透镜中的孔径光阑控制环的水平联接臂，并且设置有 孔径光阑控制凸轮，只要快门释放杆未被压下或向下移动。 因此，当安装透镜时，水平联轴器将不会与离合器杆接合，从而可以自由地安装和拆卸镜头。 当按下快门释放杆时，离合器杆与联接臂移动成机械或摩擦接合，并且当快门释放杆进一步被压下时，联接环旋转一定角度，该角度对应于指针的移动角度 曝光表，使得离合器杆使控制环与联接环一起旋转。

公开(公告)号：US3589259A

公开(公告)日：1971-06-29

申请号：US3589259D

申请日：1968-12-16

申请人： RICOH KK

发明人： IMAI TADAYUKI

IPC分类号： G03B9/07 ,  G03B9/06

CPC分类号： G03B9/07

摘要： An aperture control mechanism for a photographic taking lens system wherein a cam ring is provided with an automatic and manual aperture setting cam slots both of which are adjacent to and continuous with each other and which serve to control the range of angle of rotation of an aperture control lever for closing an aperture blade; and the cam ring is interlocked with an aperture setting ring, whereby automatic and manual aperture index scale regions can be disposed adjacent to each other upon the aperture setting ring.

公开(公告)号：US3911458A

公开(公告)日：1975-10-07

申请号：US42132373

申请日：1973-12-03

申请人： RICOH KK

发明人： IMAI TADAYUKI ,  SHIRATORI YOSHITAKA

IPC分类号： G03B7/16 ,  G03B7/12

CPC分类号： G03B7/12 ,  G03B7/16

摘要： A camera shutter mechanism wherein depression of a release button causes a connecting lever to be horizontally displaced over a distance dependent upon the angular position of the needle of an exposure meter, the position being indicative of the brightness of a subject, so that as the horizontal position of the connecting lever is displaced, the angular position of an aperture control cam is varied. When the release button is further depressed, a drive pawl is adapted to cause a flywheel to rotate so that a control pin extending from this flywheel is moved away from an arcuate cam surface of the aperture control cam to permit the rotation of a shutter blade drive lever until it engages with the arcuate cam surface of the control cam whereby the shutter blades are opened. When the control pin is returned to its initial position and engaged with the arcuate cam surface of the control cam again, the shutter blade drive lever is returned to its initial position to close the shutter blades. The degree of opening of the shutter blades is dependent upon the angle of rotation permitted to the shutter blade drive lever. When a flashcube is mounted, the exposure meter is made inoperative and the degree of opening of the shutter blades is dependent upon a distance to a subject by the stroke of displacement of a shutter blade drive pin which in turn is determined by a flashmatic cam which is operatively coupled to a distance setting ring.

摘要翻译： 一种相机快门机构，其中按下释放按钮使得连接杆在取决于曝光计的针的角度位置的水平位移一段距离，该位置指示被摄体的亮度，使得作为水平 连接杆的位置移动，孔径控制凸轮的角度位置变化。 当释放按钮被进一步按压时，驱动爪适于使飞轮旋转，使得从该飞轮延伸的控制销移动远离孔径控制凸轮的弓形凸轮表面，以允许快门叶片驱动 杆，直到其与控制凸轮的弓形凸轮表面接合，由此快门叶片打开。 当控制销返回到其初始位置并再次与控制凸轮的弓形凸轮表面接合时，快门叶片驱动杆返回其初始位置以关闭快门叶片。 快门叶片的打开程度取决于快门叶片驱动杆允许的旋转角度。

公开(公告)号：US3608448A

公开(公告)日：1971-09-28

申请号：US3608448D

申请日：1970-02-26

申请人： RICOH KK

发明人： IMAI TADAYUKI

IPC分类号： G03B7/08 ,  G03B17/42 ,  G03B17/00

CPC分类号： G03B17/42 ,  G03B7/0807

摘要： AN EXPOSURE METER SWITCH FOR CAMERAS WHEREIN A FIRST SWITCH WHICH IS OPENED OR CLOSED IN RESPONSE TO THE ACTUATION OF A SELECTION MEMBER FOR SELECTING EITHER AN AUTOMATIC EXPOSURE SETTING OR A MANUAL EXPOSURE SETTING AND A SECOND SWITCH WHICH IS CLOSED IN RESPONSE TO THE FILM WINDING AND IS AUTOMATICALLY OPENED IN RESPONSE TO THE SHUTTER RELEASE OPERATION ARE CONNECTED IN SERIES TO A CIRCUIT OF AN EXPOSURE METER.