Patent ID: 7652834

Claim:
A lens driving unit comprising: a housing; a driving source fixed to the housing; a lead screw extending in an optical axis direction and being configured to be rotated and driven by the driving source; a nut configured to be screwed with the lead screw; a lens frame holding a lens and supported movably in the optical axis direction; a contact portion provided at the lens frame so as to be brought into contact with the nut from one end side of the optical axis direction; and a spring urging at least one of the nut and the contact portion so that the nut and the contact portion are brought into contact with each other, wherein the nut is unrotatably and movably engaged with the housing, the nut being moveably engaged with the housing in the optical axis direction; and wherein the contact portion and the nut are configured so as to be brought into partial contact with each other in a projected plane of the nut in the optical axis direction.