Title:
AUTOMATIC FOCUSING DEVICE BASED ON MOVABLE SENSOR DRIVEN BY SMA WIRE
Document Type and Number:
WIPO Patent Application WO/2023/130644
Kind Code:
A1
Abstract:
Provided in the present invention is an automatic focusing device based on a movable sensor driven by an SMA wire. The automatic focusing device comprises: a housing having a first mounting slot and a second mounting slot, which communicate with each other; a lens, which is fixed in the first mounting slot; a sensor assembly, which is arranged in the second mounting slot and can reciprocate in the optical axis direction of the lens; a driving element, which comprises an SMA wire, two ends of the SMA wire being fixed to the housing and a middle portion thereof being connected to the sensor assembly, and the middle portion being further away from the lens than the ends and being used for driving the sensor assembly to move under heat shrinkage; and an elastic element, which is connected to the sensor assembly and is used for providing a restoring force for the sensor assembly, so that the sensor assembly returns to an initial position. The automatic focusing device provided in the present invention has a simple and reliable movement mechanism and a movement mode, and can achieve product miniaturization.
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Inventors:
JARNO MATIKAINEN (CN)
Application Number:
PCT/CN2022/093425
Publication Date:
July 13, 2023
Filing Date:
May 18, 2022
Export Citation:
Assignee:
AAC OPTICS SUZHOU CO LTD (CN)
International Classes:
G02B7/09; G03B13/36
Foreign References:
| CN112887520A | 2021-06-01 | |||
| US20210195073A1 | 2021-06-24 | |||
| CN113472978A | 2021-10-01 | |||
| CN108111724A | 2018-06-01 | |||
| US20080198249A1 | 2008-08-21 |
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