| 摘要 |
A main driving member coupled with a stepping motor is advanced or returned by normal and reverse rotation of the stepping motor. When the main driving member is advanced, a lens driving member follows the main driving member to be advanced to a focused position and is engaged at the focused position. A shutter mechanism is opened and closed in the course of the returning of the main driving member and subsequently the engagement of the lens driving member is released in the course of the returning of the main driving member so that the lens driving member is returned to its initial position. Any one of a sensor for detecting the initial position of the main driving member or a sensor for detecting the initial position of the lens driving member is provided. By employing one of the two sensors, a single sensor is used to confirm the operation of both of the lens driving member and the main driving member.
|
