Lens driving device

Abstract

The drive set includes a base, a collar extension setup on the base, and a magnet located inside the collar extension. Characters are that the drive set also includes a first and a second lens drive modules setup inside same collar extension and the magnet jointly. The first lens drive module consists of first coil inside the magnet, first lens supporter and lens setup inside the first coil. The second lens drive module consists of second coil inside the first coil, second lens supporter and lens setup inside the second coil. Two drive modules share the collar extension and the magnet so as to make drives set miniaturization. Friction tabling between lens supporters and the collar extension makes supporters possible to move smoothly. Installed spring guarantees stabilizing force for the lens supporters. Thus, it is difficult to shake lens supporters even if camera is suffered from bump or impulsion. Features are: excellent impact resistance, simplified structure and few parts.

Description

technical field [0001] The invention relates to a lens driving device, in particular to a lens driving device installed in a small camera or a mobile phone to drive a variable focus lens and an automatic focus lens. Background technique [0002] The lens driving device in the prior art usually has two functions, that is, after using the zoom lens and the focus lens, it can perform auto-focus (auto-zoom) and magnification change. Such a lens driving device usually converts the rotary motion in the form of a spiral into a linear motion to move the lens toward the optical axis. Please refer to the announcement published in Japanese Patent No. 1996-140523 (Heisei 7-140523) for the above-mentioned technical content. [0003] However, the mechanical lens driving device of the prior art, which converts the rotary motion into a linear motion by using a spiral method to move the lens to the optical axis, can achieve the required function on a large camera, but it is used in a portab...

AI Technical Summary

Problems solved by technology

[0003] However, the mechanical lens driving device of the prior art, which converts the rotary motion into a linear motion by using a spiral method to move the lens to the optical axis, can achieve the required function on a large camera, but it is used in a portable camera. In small cameras, the direction of thrust and the direction of lens movement are not consistent, resulting in greater drive loss; at the same time, it causes defects such as slowed down of lens movement and slow response

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