Patent ID: 7099088
Filing Date: 2006-08-29
Classification: G02B

Abstract:
1. A lens drive mechanism comprising: a rotatable lead screw driven to rotate about an axis thereof, said axis extending parallel to an optical axis of a lens group; a non-rotatable guide shaft which extends parallel to said rotatable lead screw; a nut member made of synthetic resin which includes a screw engaging portion, with which said rotatable lead screw is screw-engaged, and a rotation-prevention portion, which is engaged with said non-rotatable guide shaft to prevent said nut member from rotating about said rotatable lead screw; and a lens support frame which supports said lens group and is movable together with said nut member in an optical axis direction, wherein said rotation-prevention portion of said nut member includes a pair of holding portions which are formed integral with said nut member so as to resiliently contact said non-rotatable guide shaft so that at least one of said pair of holding portions is resiliently deformed.