lens driver

Abstract

The invention relates to a lens driving device. The present invention utilizes the novel main body iron shell with bosses as the assembling skeleton, so that all parts can be positioned and assembled in the main body iron shell, and the main body iron shell can shield the magnetic field. The iron shell of the main body has a boss, which can be stamped and formed by a mold, so as to better control the size and tolerance and improve the assembly accuracy. The lens support body and the base, as well as the coil and the lens support body are embedded respectively, so as to effectively prevent light leakage inside the product and prevent foreign objects from falling out. The base adopts metal insert molding method to increase strength. Using metal laser welding, the main iron shell, stator iron shell, and embedded metal inserts of the base are welded together, which has better strength than using glue. Parts are assembled in a single direction, which is easy to automate.

Description

technical field [0001] The present invention relates to a lens driving device, in particular to a camera for autofocus function, which is specifically applied to mobile phones, cameras, video cameras or detection sensor vision systems, robot vision systems and other equipment with camera functions to drive lens displacement to A driving device in the micro-image field of the lens that realizes focusing. Background technique [0002] The similar lens driving devices adopted by domestic and foreign miniature cameras mostly adopt the disclosed scheme in the "lens driving device" disclosed in Chinese Patent Publication No. CN 1683946A. The stator part is composed of an iron shell and four magnets of the same shape. The magnets 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 back and forth along the central direction inside the iron sh...

AI Technical Summary

Problems solved by technology

[0006] The lens driving device achieves the purpose of the present invention through the following technical means: first, an additional external main body iron shell is used to enhance the electromagnetic shielding effect and meet the needs of some customers for the electromagnetic shielding effect; second, the use of an integrated shell avoids In the prior art, the burrs in the molding of plastic parts are not easy to control and the flatness of plastic parts cannot be controlled, because metal stamping parts have better plasticity, reliability and better precision; third, between the lens support and the base 1. The coil and the lens support body are respectively embedded, which prevents light leakage and foreign objects from falling out from the structural design; 4. The lens support body and the coil adopt positioning matching points to achieve double positioning, so as to ensure the right and left assembly of the two Position deviation and concentric deviation; fifth, the external iron shell has a boss, which can be used as the installation skeleton of all components, and each component is assembled separately, which is easy to realize automatic installation; finally, the base adopts metal inlay molding to get more Good strength, and laser welding can be used to weld the outer iron shell, stator iron shell, and base inlaid metal parts together, so that the combination of various parts has better strength

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