Title:
LENS DRIVE DEVICE, CAMERA MODULE, AND CAMERA MOUNT DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/154781
Kind Code:
A1
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.
Inventors:
ARANAI MASAHIKO
Application Number:
PCT/JP2017/008535
Publication Date:
September 14, 2017
Filing Date:
March 03, 2017
Export Citation:
Assignee:
MITSUMI ELECTRIC CO LTD (JP)
ARANAI MASAHIKO
ARANAI MASAHIKO
International Classes:
G02B7/04; G03B15/00
Foreign References:
| JP2012032778A | 2012-02-16 | |||
| JPH0850515A | 1996-02-20 |
Other References:
See also references of EP 3428705A4
Attorney, Agent or Firm:
WASHIDA, Kimihito (JP)
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