Patent attributes
A drive mechanism of a zoom lens includes three movable members which support optical elements, including a front movable member, an intermediate movable member and a rear movable member; a common driving member including a driving device for moving the three movable members independently; and a biasing member including first and second spring members which bias the three movable members to remove backlash. One of the front movable member and the rear movable member serves as a common-engaging spring support member to which one end of each of the first and second spring members are connected, and the other of the front movable member and the rear movable member, and the intermediate movable member serve as two single-engaging spring support members to which the other ends of the first spring member and the second spring member are connected, respectively.
