EMI-proof miniature lens focusing mechanism

An EMI-proof miniature lens focusing mechanism, comprising:

• a frame in the form of a hollow member having four equal vertical sides, each of the four vertical sides having a central opening for receiving a magnetic element therein;
• a lens holder in the form of a hollow member internally defining an axially extended opening for holding a miniature lens therein, and being enclosed in a winding element;
• at least one elastic element being in the form of a flat plate and having a central portion cut away to provide a round opening corresponding to the axial opening of the lens holder;
• the elastic element including a fixed outer portion and a movable inner portion connected to the fixed outer portion via four substantially L-shaped narrow bands;
• and the fixed outer portion being connected to the frame, and the movable inner portion being connected to the lens holder, such that the lens holder is elastically and movably supported on the elastic element and suspended in the hollow frame;
• an upper and a lower cover being located above and below the frame, respectively, to assist in connecting the at least one elastic element to the frame;
• and
• a metal housing enclosing an assembly of the upper cover, the elastic element, the lens holder, the frame, and the lower cover;
• the metal housing being provided at a lower end with at least one conducting plate for electrically connecting to a ground, so that electromagnetic effects produced by the winding element and the magnetic elements on external environment can be eliminated, and EMI and ESD from external environment can be isolated.