Patent ID: 8014089

Claim:
A lens driving device to make a first lens group and a second lens group for an imaging device slide independently in the optical axis direction of a lens by using a lens driving unit which makes a lens group holding frame for holding a lens group slide in the optical axis direction of a lens by using a motor, wherein the lens driving unit is such that the lens group holding frame is supported to be able to slide by connecting to a guide pole arranged in parallel with the optical axis; and a driving force transmission means consisting of a pinion which is mounted on the output shaft of the motor and rotates in the direction of rotation of the output shaft of the motor and a rack formed in the lens group holding frame is provided to transmit a driving force of the motor to the lens group holding frame by gearing the pinion with the rack and the lens group holding frame is made to slide along the guide pole by the driving force transmission means, wherein a first guide pole provided in a first lens driving unit to make the first lens group slide and a second guide pole provided in a second lens driving unit to make the second lens group slide are provided in parallel on the outside of the lens group holding frame; a first rack formed in the first lens driving unit and a second rack formed in the second lens driving unit are arranged to be able to slide independently; and a first pinion provided in the first lens driving unit and a second pinion provided in the second lens driving unit are arranged between the first guide pole and the second guide pole arranged in parallel.