Patent ID: 7798731
Filing Date: 2010-09-21
Classification: G03B

Abstract:
1. A diaphragm driving device provided in a camera body of a digital camera to which an interchangeable lens is detachably attached, said interchangeable lens including a diaphragm mechanism having a diaphragm control bar for changing an aperture size by a rotation of said diaphragm control bar about an optical axis, wherein said camera body comprises: a diaphragm-driving slide plate which engages with said diaphragm control bar when said interchangeable lens is attached to said camera body; a diaphragm drive motor which rotates in both forward and reverse directions for moving said diaphragm-driving slide plate step wise in accordance with object brightness information of an object image formed through said interchangeable lens; and a converting mechanism for converting the rotation of said diaphragm drive motor in said forward and reverse directions into a force for moving said diaphragm-driving slide plate in corresponding diaphragm stop-down and diaphragm-opening directions; wherein said diaphragm drive motor can be rotated, via said converting mechanism, when said diaphragm-driving slide plate is forcibly moved.