A Simple Voice Coil Motor Lens Driving Device

Abstract

The invention discloses a lens driving device for a simple voice coil motor. A pedestal acts as the base, the four corners of the pedestal are provided with a positioning column respectively. The external sides of the positioning columns are curved surfaces. The upper plane of the pedestal of the side edges of the positioning columns is provided with positioning pins. The opposite surfaces of the adjacent positioning columns are vertical surfaces which are parallel with each other. Rear springs are clamped on the pedestal via the positioning pins and the vertical surfaces. Lens supporting bodies are nested in the internal circumference of the rear springs and then clamped via the four positioning columns. The lens supporting bodies are externally sleeved by a coil. A shell is internally provided with magnets which are clamped via the curved surfaces of the external sides of the positioning columns. The beneficial effects of the lens driving device for the simple voice coil motor are that the structure is simple and optimized, positioning is completed by the pedestal and the positioning columns arranged on the pedestal, and the key control factor is reduced to one component so that positioning precision is easier to control, an AF function and a two-phase function can be realized and cost can be reduced. Besides, stability of the optical axis can be further enhanced via arrangement of front springs.

Description

technical field [0001] The present invention relates to a lens driving device, in particular to a lens driving device of a simple voice coil motor, which is used for a camera with an auto-focus function, and is specifically applied to a mobile phone, a camera, a video camera or a detection sensor vision system, a robot vision system, etc. with a camera function. equipment. Background technique [0002] The similar lens driving device adopted by domestic and foreign miniature cameras mostly adopts the scheme disclosed in the disclosed lens driving device of Chinese Patent Publication No. CN1683946A, and the stator part is composed of an iron shell and four magnets of the same shape. They are respectively assembled at the four corners of the iron shell; the coil and the lens support are fixed together and placed inside the stator, and the lens support, together with the coil, moves forward and backward along the central direction inside the iron shell and magnet of the stator....

AI Technical Summary

Problems solved by technology

[0003] The structure of this lens driving device is mainly positioned and guided through the shell, which requires about 12 parts. The structure is complex, there are many parts, the assembly process is complicated and defective products are easy to appear, and the function can only realize the AF function.

Images