US Patent 7518806 Lens module

A disclosed lens module includes a zooming actuator, a cam, an auto-focusing actuator and at least two sets of lenses. The cam is coupled to and driven by the zooming actuator. The cam 104 has at least two tracks. The auto-focusing actuator is coupled to and moved along one of the tracks of the cam. One of the sets of lenses is coupled to and driven by the auto-focusing actuator. Another one of the sets of lenses is coupled to the another track of the cam.