Reed for camera lens drive mechanism

Abstract

The invention relates to a spring leaf used in a camera lens drive mechanism. The whole spring leaf takes a slice shape, and the spring leaf consists of an annular outer profile and an annular inner profile positioned in the outer profile, the inner wall of the outer profile and the outer wall of the inner profile are spaced, and at least two groups of connecting spring wire groups between the outer profile and the inner profile at intervals. The spring leaf is characterized in that each group of the spring wire groups comprises two S-shaped connecting spring wires which are arranged in a mirror image manner, the upside of a regular S-shaped connecting spring wire is connected with the upside of a reverse S-shaped connecting spring wire, the lower side of the right regular S-shaped connecting spring wire is connected with the inner wall of the outer profile, meanwhile, the lower side of the reverse S-shaped connecting spring wire is connected with the outer wall of the inner profile. The anti-distortion capacity can be improved by the coiling action of the S-shaped connecting spring wires, and the connecting spring wires have good elastic effect, both the integrated rigidity and the impact resistance can be effectively enhanced, which ensures that a lens drive structure using the spring leaf has better imaging quality.

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 Invention Patent No. 200410017724.3, which includes a cylindrical magnetic yoke installed on the base A magnet and a coil are placed in the yoke ring, and a lens with a lens support is arranged on the inner peripheral side of the coi...

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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