| 摘要 |
PURPOSE:To simplify the structure and to hold high focusing precision, by providing a governing function, by which the operation speed of a charge member due to energizing of a spring is governed to an approximately constant value, in the transmission sequence from a motor to the carge member. CONSTITUTION:When an automatic focusing adjuster is in the charge state as shown in figure, a motor 15 is not rotated for charge because a switch S4 is turned off though a switch S3 is turned on; and when a release operating member 1 is depressed, the switch S3 is turned off, and a charge detaining member 5 is turned counterclockwise and is disenegaged from a charge member 6, and the charge member 6 is turned counterclockwise. In this constitution, since the speed governing function is provided in the speed reducing mechanism from the motor to the focusing operation member, the structure is simplified, and high focusing precision is held. |
