ELECTRO-MAGNETIC AUTO FOCUS ACTUATOR

PURPOSE: An automatic focus lens actuating device is provided to maximize magnetic force by using a structure for minimizing the inner diameter of a yoke and a magnet. CONSTITUTION: An automatic focus lens actuating device comprises a case(110), a first spring(120), a spacer(140), a second spring(180), a movable carrier(130), a ring-shaped magnet(160), a ring-shaped yoke(170), and a base(190). The case has a spring mounting surface. A leaf spring unit is formed between the inner and outer diameters of the first spring. The spacer is adhered to the outer diameter of the first spring. The second spring is cut and is divided into two parts. Each divided part has an electrode. The movable carrier is coupled to an inner screw unit and the inner diameter of the first and second springs. The ring-shaped magnet is magnetized in the optical axis direction of a lens. The ring-shaped yoke is coupled to the surface of the magnet.