Reed for driving mechanism of camera lens

Abstract

The invention relates to a reed used on a camera lens drive mechanism; the entire reeds (1,2) are shaped as thin sheets and are composed of annular outer profiles (11,21) and annular inner profiles (12,22) inside the outer profiles; gaps are arranged between the inner walls of the outer profiles and the outer walls of the inner profiles; and at least two alternately arranged connecting spring wires (3,4) are connected between the outer profiles and the inner profiles. The invention is characterized in that the connecting spring wires are arranged in a circumferentially consecutive double-S-shaped coil form; in two adjacent S-shaped parts (31,41), the lower edges (311,411) of the front S-shaped part are connected with the upper edges (312,412) of the back S-shaped part; the outer profiles are square or rectangular, while the inner profiles are circular; and the connecting spring wires are arranged at the corners and edges of the outer profiles. Through the coiling effect of the S-shaped parts, the anti-deformation ability can be improved; the connecting spring wires are provided with good flexibility, and the overall stiffness and impact resistance can be effectively upgraded to ensure good imaging quality of the lens drive structure using the reed.

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

Images