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1. (WO2017154781) LENS DRIVE DEVICE, CAMERA MODULE, AND CAMERA MOUNT DEVICE

Pub. No.:    WO/2017/154781    International Application No.:    PCT/JP2017/008535
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 04 00:59:59 CET 2017
IPC: G02B 7/04
G03B 15/00
Applicants: MITSUMI ELECTRIC CO., LTD.
ミツミ電機株式会社
ARANAI, Masahiko
荒内 正彦
Inventors: ARANAI, Masahiko
荒内 正彦
Title: LENS DRIVE DEVICE, CAMERA MODULE, AND CAMERA MOUNT DEVICE
Abstract:
Provided are a lens drive device, a camera module, and a camera mount device which have a desired thrust and linear performance, and which can be made smaller and thinner. The lens drive device is provided with: a flat AF coil, having a first linear part positioned on the light-receiving side in the optical axis direction, and a second linear part positioned on the image-forming side in the optical axis direction; a single-surface-two-pole AF magnet, configured with a first magnet facing the first linear part and a second magnet facing the second linear part; and a yoke arranged so as to cover the surface of the first magnet on the light-receiving side in the optical axis direction. The surface area of the first magnet surface facing the first linear part is greater than the surface area of the second magnet surface facing the second linear part, and the magnetic flux that crosses the first linear part is greater than the magnetic flux that crosses the second linear part across the entire movable range of an AF moving part.