Lens drive unit

JP2024545541AActive Publication Date: 2024-12-10CHANGZHOU RAYTECH OPTRONICS CO LTD
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Patent Information

Application Number
JP2023530553
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-11-23
Filing Date
2023-04-03
Publication Date
2024-12-10
Estimated Expiration
2043-04-03

AI Technical Summary

Technical Problem

Conventional lens driving devices require a large number of components, including drive coils, anti-vibration coils, and magnetic steels installed at multiple locations, leading to increased complexity and cost.

Method used

A simplified lens driving device design with a support stand featuring magnetic sets on three sides, anti-vibration coils on the pedestal, and drive coils on the lens barrel, reducing the number of components while maintaining performance.

Benefits of technology

The reduced component count ensures cost-effectiveness and maintains autofocus and anti-vibration capabilities, with improved magnetic force and linearity through a magnetically conductive ring and adhesive fixing of magnetic steels, enhancing stability and performance.

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Abstract

The present application provides a lens driving device. [Solution] The lens driving device includes a base, a housing, a support stand, a lens barrel, an anti-vibration drive assembly, a magnetic circuit assembly, and a focus drive assembly, wherein the support stand includes two first enclosing walls facing and parallel to each other and two second enclosing walls facing and parallel to each other, the extension directions of the first enclosing walls and the second enclosing walls being perpendicular to each other, the magnetic circuit assembly includes a first magnetic set fixed to one of the first enclosing walls, a counterweight fixed to the other first enclosing wall, and two second magnetic sets fixed to the two second enclosing walls, respectively, the anti-vibration drive assembly includes three anti-vibration coils fixed to the base and spaced apart from the first magnetic set and the two second magnetic sets, and the focus drive assembly includes two drive coils fixed to the outside of the lens barrel and spaced apart from the inside of the two second magnetic sets, respectively.
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Citation Information

Patent Citations

  • Lens drive device

    JP2015114555A

  • Anti-shake device

    JP2017156775A

  • Electromagnetic driving device for mobile apparatus

    JP2018173583A

  • Lens driving device, camera module, and camera-mounted device

    JP2022095846A

  • Lens driving device and camera module

    WO2020122126A1