Patent ID: 7643744

Claim:
A lens driving device, comprising: a first lens holder for supporting a first set of lens elements; a second lens holder for supporting a second set of lens elements which is disposed in a direction of an optical axis of the first set of lens elements and is positioned more to an image pickup plane side than the first set of lens elements is; a first driving unit for driving the first lens holder in the direction of the optical axis; and a second driving unit for driving the second lens holder in the direction of the optical axis, wherein the first driving unit comprises: a first motor disposed on a lateral side of the first set of lens elements and having an output shaft disposed in parallel with the optical axis of the first set of lens elements; a first gear fitted around the output shaft of the first motor; a first lead screw rotated by the first gear; and a first nut which is fitted around the first lead screw and is movable in the direction of the optical axis, the second driving unit comprises: a second motor disposed on a lateral side of the second set of lens elements, the first motor and the second motor being disposed on the same lateral side with respect to the first set and second set of lens elements, and the second motor having an output shaft disposed in parallel with the optical axis of the first set of lens elements; a second gear fitted around the output shaft of the second motor; a second lead screw rotated by the second gear; and a second nut which is fitted around the second lead screw and is movable in the direction of the optical axis, the output shaft of the first motor and the output shaft of the second motor overlap each other at least partially in an axial direction of the output shafts, the first driving unit moves the first lens holder in the direction of the optical axis via the first nut moving in the direction of the optical axis, the second driving unit moves the second lens holder in the direction of the optical axis via the second nut moving in the direction of the optical axis, and a position of an image pickup plane side end face of the first motor is more to the image pickup plane side than a position most to the subject side of the second lens holder is.