LIGHT QUANTITY ADJUSTING DEVICE, AND LENS BARREL AND CAMERA PROVIDED THEREWITH,申请号JP19980282049-传众专利搜索

LIGHT QUANTITY ADJUSTING DEVICE, AND LENS BARREL AND CAMERA PROVIDED THEREWITH

申请公布号：JP2000098444(A)

申请号：JP19980282049

申请日期：1998.09.18

申请公布日期：2000.04.07

申请人：

CANON INC

发明人：MIYAGAWA MASAE;TANAKA HIDETOMO

分类号：H04N5/225;G02B7/10;G03B9/02;(IPC1-7):G03B9/02

主分类号：H04N5/225

摘要：PROBLEM TO BE SOLVED: To miniaturize a lens barrel and to stably drive a diaphragm in the case of driving a diaphragm blade by a diaphragm driving part and a driving lever. SOLUTION: This device is equipped with a first driving lever 31 provided on the output shaft of an iris stepping motor 30 supported by a second moving ring 5 holding a part of a lens group, and a second driving lever 32 turnably supported by a rotary shaft 32a at the optimum position of the ring 5, and the top pin 31a of the lever 31 is fit in the long groove 32b of the lever 32, and a driving pin 32c provided on the lever 32 is fit in the long groove 7b of a pair of diaphragm blades 7, and the blade 7 is turned by the driving force of the motor 30 through the levers 31 and 32, so that its stop amount is adjusted.