The utility model relates to an aperture driving mechanism, a lens driving device and a
camera module, comprising an aperture support and a plurality of aperture blades moving relative to the aperture support in a plane vertical to an
optical axis, an aperture driving frame for driving the aperture blade to move so as to change the aperture of the light inlet hole is arranged on the aperture bracket, one of a driving
magnet or a driving coil is arranged on the aperture driving frame, and the driving
magnet and the driving coil are oppositely distributed at intervals along the direction of the
optical axis or perpendicular to the direction of the
optical axis. The camera has the advantages that the single
magnet driving structure is simple and is not easily interfered by an external
magnetic field, the precise control and stability of the aperture are improved, only one magnet is needed, the size of the driving part is smaller, the light and
miniaturization of the camera design is facilitated, only the single magnet is needed to drive the aperture, the structure is simpler, parts and
assembly processes are reduced, and the cost is reduced. In the aspect of diaphragm anti-shake, a lighter and thinner design is used, so that the memory
alloy wire and the conductive
layout occupy less space in the optical axis direction.