Lens driving unit and lens driving device
AssigneeTamron Co., Ltd.
InventorYoshio Kakuta
Life of this patent
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Abstract
Object of the present invention is to provide a lens driving unit in small size and perform a high ratio optical zooming and a lens driving device. To achieve the object, the lens driving unit in which the lens group holding frame supported to be able to slide by connecting to a guide pole arranged in parallel with the optical axis; and a drive transmission unit consisting of a pinion mounted on the output shaft of the motor and a rack formed in the lens group holding frame is adopted, and a driving force of the motor is transmitted to the lens group holding frame by gearing the pinion with the rack to make the lens group holding frame slide along the guide pole, and a lens driving device comprising the lens driving unit is adopted.
Claims11
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.
Dependencies are inferred from the claim text.