Patent ID: 7826159

Claim:
A focus module comprising: a substrate with at least one first magnet formed thereon and an aperture therein; a frame fixed on the substrate and defining a hole aligning with the aperture of the substrate; a holder with a lens received therein positioned on the substrate and received in the hole of the frame; at least one second magnet corresponding to the first magnet being fixed on the holder and facing the at least one first magnet, and the at least one first magnet and the at least one second magnet being electromagnets; and an elastic element connecting the holder to the frame, the elastic element being strip-shaped and comprising a first end fixed to the side surface of the holder, a second end fixed on the inner surface of the hole, and at least one U-shape bend connecting the first and second ends, two sides of the U-shape bend paralleling to the side surface of the holder and the inner surface of the hole to make the holder capable of movable relative to the substrate along an optical axis of the lens.