专利名称：Optical apparatus发明人：Haruhisa Yamamoto申请号：US09/075667申请日：19980511公开号：US06025964A公开日：20000215
摘要：An optical apparatus includes an optical unit having an optical axis, a manualoperation member arranged to be manually operated to drive the optical unit, a drivingmotor for electrically driving the optical unit, and a driven member arranged to be drivenby the driving motor, wherein the manual operation member and the driven member arekept in contact with each other through a predetermined frictional force on a ring-shaped face whose center lies at the optical axis, and wherein a driving force of thedriving motor is transmitted via the driven member to the manual operation member,while a manual driving force onto the manual operation member is not transmitted to thedriven member.
申请人：CANON KABUSHIKI KAISHA
代理机构：Robin, Blecker & Daley
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