Reed for camera lens drive mechanism

Abstract

The invention relates to reeds for a camera lens drive mechanism, the reeds (1, 2) are shaped like flakes as a whole and consist of annular outer profiles (11, 21) and annular inner profiles which are positioned in the outer profiles (11, 21), spacing intervals are provided between the inner walls of the outer profiles and the outer walls of the inner profiles, the outer profiles and the inner profiles are connected by at least two connection reed threads (3, 4) which are arranged at intervals, and the connection reed threads (3, 4) are coiled and arranged along a circumferential continuous shape of U. The outer profiles are square or rectangular, the inner profiles are circular, and the connection reed threads are arranged at the side angels in the outer profiles. The connection reed threads can improve the anti-deformation capacity through the U-shaped coiling role, and the connection reed threads further have good elastic effect and can effectively improve overall stiffness and impact resistance performance, thereby ensuring the good imaging quality of the lens drive mechanism which uses the reeds.

Description

technical field [0001] The invention belongs to the field of camera lens driving devices; in particular, it relates to a reed used for a camera lens driving mechanism which maintains its motion balance and stability during the lens driving process. The invention is mainly used in the lens driving mechanism of the miniature camera with automatic focusing function, and is matched with miniaturized and high-quality sensors, and is especially suitable for supporting applications in mobile phones, computers, automobiles and robots. Background technique [0002] The structure of the similar lens driving device adopted in existing miniature cameras at home and abroad is relatively common, such as the scheme disclosed in "Lens Driving Device" in Chinese Patent No. 200410017724.3, which includes a cylindrical yoke ring installed on the base , a magnet and a coil are arranged in the yoke ring, and a lens with a lens support is arranged on the inner peripheral side of the coil; the mag...

AI Technical Summary

Problems solved by technology

[0005] Yet one of its weak points is that the annular outer profile and the annular inner profile in the above-mentioned front and rear reeds are only connected by a plurality of substantially linear spring wires, therefore, the whole front and rear reeds Rigidity, impact resistance and deformation resistance are relatively poor. When such front and rear reeds are stressed, the spring wires on them are easily deformed, which will cause the lens in the lens driving structure using the reed to lose light. Deviation occurs when the axis is displaced, which affects the imaging quality of the camera

[0006] Secondly, the shape of the front and rear reeds is annular and dislocated in the same direction. Therefore, when the reeds are deformed in the forward and backward displacement, a rotational force in the same direction will be generated at the same time, which will easily cause the lens support to rotate and deviate.

[0007] Again, the connection and positioning device between the front reed and the rear reed and the lens support has a lot of procedures, and the positioning of the front reed and the rear reed depends on the position of the external frame and the base. The inner edge and the outer edge of the front reed and the rear reed are coordinated and positioned. Once there is a problem with the tolerance of one of the above-mentioned components, it is very easy to cause a large concentricity and optical axis deviation of the supported lens support. degrade image quality

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