Optical element driving mechanism

An optical element driving mechanism used for driving an optical element, comprising:

• a fixed portion;
• a movable portion movable relative to the fixed portion and comprising a first top wall, a second top wall protruding from the first top wall, and a third top wall protruding from the first top wall, wherein the optical element is disposed on the first top wall of the movable portion, a first top wall surface of the first top wall faces the optical element, a second top wall surface of the second top wall faces the optical element, and a third top wall surface of the third top wall faces the optical element;
• and
• a driving assembly used for driving the optical element to move relative to the fixed portion in a first dimension, wherein the first dimension is rotation relative to a rotational axis parallel to a first axis,
• wherein the driving assembly comprises:
• a coil;
• a first magnetic element corresponding to the coil;
• and
• a second magnetic element corresponding to the coil, wherein the first top wall is disposed between the first magnetic element and the second magnetic element;
• wherein:
• the coil, the first magnetic element, and the second magnetic element are arranged in a second axis;
• the coil and the optical element are arranged in a third axis;
• and
• the first axis, the second axis, and the third axis are mutually perpendicular.