Furthermore, as shown in FIG. 1 and FIG. 3, two side openings 1-1025 are formed on the outer frame 1-102 so that the outermost movable cantilevers 1-1143 can pass through the side openings 1-1025 to the outside of the outer frame 1-102. When the photosensitive element driving mechanism 1-100 is assembled, the side openings 1-1025 of the outer frame 1-102 can assist the movable cantilevers 1-1143 to be positioned, thereby improving the overall structural strength and improving workability at the same time, making it easy to produce and assemble.