Optical element driving mechanism

An optical element driving mechanism, comprising:

• a first movable part, including an optical element;
• a fixed assembly, wherein the first movable part is movable relative to the fixed assembly;
• a first driving assembly, configured to drive the first movable part to move relative to the fixed assembly;
• wherein the optical element driving mechanism further includes a strengthening assembly configured to strengthen the fixed assembly to bear a force along a first axis;
• wherein the fixed assembly includes an outer frame and a base;
• the outer frame is configured to be assembled to the base;
• the outer frame includes a top wall extending along a third axis, and the third axis is perpendicular to the first axis;
• wherein the strengthening assembly includes:
• a first side wall, extending from the top wall;
• a second side wall, extending from the top wall;
• and
• a third side wall, extending from the top wall;
• wherein before the outer frame is assembled to the base, the first side wall, the second side wall and the third side wall extend along the first axis;
• wherein when viewed along the third axis, the second side wall and the third side wall are located on opposite sides of the top wall;
• wherein when viewed along the third axis, and after the outer frame is assembled to the base, the second side wall having a plate-shaped structure is not parallel to the third side wall having a plate-shaped structure;
• wherein the strengthening assembly further includes:
• a first supporting portion, corresponding to the first side wall;
• a second supporting portion corresponding to the second side wall;
• and
• a third supporting portion, corresponding to the third side wall;
• in the first axis, a shortest distance between the first side wall and the first supporting portion is smaller than a shortest distance between the fixed assembly and an optical module corresponding to the optical element driving mechanism.