Patent ID: 7570441
Filing Date: 2009-08-04
Classification: G02B,G03B

Abstract:
1. A lens drive apparatus which electrically drives an operation member provided in a lens apparatus and allows manual operation of the operation member, comprising: an electric driving switch which is operated to instruct electric drive of the operation member; a motor which generates power to electrically drive the operation member; a clutch provided in a power transmission path from the motor to the operation member; a position detector which detects the position of the operation member; a range setter which sets a permissible movement range of the operation member; and a controller which controls the motor and the clutch in response to the operation of the electric driving switch, wherein, in a case where the detected position by the position detector changes from the inside of the permissible movement range to the outside thereof in a non-motor-driven state where the electric driving switch is not operated, the controller controls the clutch so that a load on the movement of the operation member is increased in comparison with a case where the detected position is within the permissible movement range.