Patent attributes
An auto-focus lens module uses electromagnetic force to drive a lens moving for focusing. The auto-focus lens is composed by a lens holder, a coil and an upper frame clipped on outer circumference of a lens so as to form a lens holder set. And the coil is fixed between the lens holder and the upper frame so as to reduce diameter and volume of the coil. Two arched magnets are disposed on left and right sides of the coil and are positioned by a top cover so that the volume of the magnets is reduced. Two springs are disposed on two guide pins on opposite angles, elastically supported between the lens holder and the inner surface of the top cover for providing the lens holder homogeneous support while moving for focusing. Thereby, the components of the lens module are simplified, the volume of the device is minimized, and the lens holder moves stably for focusing.
