Optical element driving mechanism

An optical element driving mechanism, comprising:

• a fixed portion;
• a movable portion, connected to an optical element with an optical axis, movable relative to the fixed portion;
• a driving assembly, driving the movable portion to move relative to the fixed portion;
• a limiting assembly, disposed on the movable portion and connected with the driving assembly, wherein the driving assembly is limited to move within a movable range relative to the fixed portion by the limiting assembly;
• and
• an adhesive assembly, comprising a first adhesive element, a second adhesive element, a third adhesive element, and a fourth adhesive element,
• wherein the limiting assembly comprises a first limiting element and a second limiting element,
• wherein when viewed along a first direction parallel to the optical axis, the first limiting element and the second limiting element at least partially overlap,
• wherein when viewed along a second direction perpendicular to the first direction, the first limiting element and the second limiting element are symmetrically arranged,
• wherein when viewed along a third direction perpendicular to the first direction and the second direction, the first limiting element and the second limiting element do not overlap,
• wherein the driving assembly comprises a first driving element and a second driving element, the first driving element and the second driving element have a shape memory alloy, and the first driving element and the second driving element are elongated structures,
• wherein two ends of the first driving element are connected to the fixed portion, the first driving element is in contact with the first limiting element and is limited to move by the first limiting element, two ends of the second driving element are connected to the fixed portion, and the second driving element is in contact with the second limiting element and is limited to move by the second limiting element,
• wherein when viewed along the second direction, the first driving element and the second driving element do not overlap over the entirety of the lengths of the first driving element and the second driving element;
• wherein the first adhesive element is injected from a first side of the first limiting element to fix the first driving element and the first limiting element,
• wherein the second adhesive element is injected from a second side of the first limiting element to fix the first driving element and the first limiting element, wherein the first side of the first limiting element and the second side of the first limiting element are opposite to each other,
• wherein the third adhesive element is injected from a first side of the second limiting element to fix the second driving element and the second limiting element,
• wherein the fourth adhesive element is injected from a second side of the second limiting element to fix the second driving element and the second limiting element, wherein the first side of the second limiting element and the second side of the second limiting element are opposite to each other.