An optical element driving mechanism is provided, including a fixed portion, a movable portion, and a driving assembly. The movable portion is movably connected to the fixed portion and includes a holder to hold an optical element having a main axis. The driving assembly is disposed on the movable portion or the fixed portion for driving the movable portion to move relative to the fixed portion.

A lens driving device includes a first housing; a bobbin disposed in the first housing; an aperture disposed on the bobbin; a board disposed on the first housing; a second coil and a fourth coil disposed on the board; a second magnet disposed on the bobbin and facing the second coil; a fourth magnet disposed on the aperture and facing the fourth coil; and a fourth sensor disposed on the board and configured to sense the fourth magnet. The fourth coil is overlapped with the second coil in a first direction perpendicular to an optical axis direction.

An optical unit has a lens frame that has a slit in a cylinder, and a blade driving device, comprising an insertion portion for insertion into the slit, wherein an opening, provided in the insertion portion, is disposed between lenses in a lens frame, wherein: the blade driving device comprises a frame that has a recessed lens frame storing portion with the insertion portion protruding; a cylinder of the lens frame comprises a pair of supporting faces that are perpendicular to the optical axis of the lens; and the lens frame storing portion of the frame has contact surfaces that contact each of a pair of supporting faces.

An optical unit has a lens frame that has a slit in a cylinder, and a blade driving device, comprising an insertion portion for insertion into the slit, wherein an opening, provided in the insertion portion, is disposed between lenses in a lens frame, wherein: the blade driving device comprises a frame that has a recessed lens frame storing portion with the insertion portion protruding; a cylinder of the lens frame comprises a pair of supporting faces that are perpendicular to the optical axis of the lens; and the lens frame storing portion of the frame has contact surfaces that contact each of a pair of supporting faces.

A mobile terminal includes: a terminal body; and a camera module provided at one side of the terminal body, wherein the camera module includes: a first lens assembly; a second lens assembly provided below the first lens assembly; a diaphragm disposed between the first and second lens assemblies, and having its aperture changed; and an actuator disposed close to the first lens assembly, and configured to reciprocate the first lens assembly, wherein the diaphragm includes: a first blade having a through hole therein; a second blade having a through hole therein, and configured to change an aperture of the diaphragm by a relative motion with respect to the first blade; a link member coupled to end parts of the first and second blades, and configured to move the first and second blades by being rotated; and a motor coupled to one side of the link member, and configured to rotate the link member.

A mobile terminal includes: a terminal body; and a camera module provided at one side of the terminal body, wherein the camera module includes: a first lens assembly; a second lens assembly provided below the first lens assembly; a diaphragm disposed between the first and second lens assemblies, and having its aperture changed; and an actuator disposed close to the first lens assembly, and configured to reciprocate the first lens assembly, wherein the diaphragm includes: a first blade having a through hole therein; a second blade having a through hole therein, and configured to change an aperture of the diaphragm by a relative motion with respect to the first blade; a link member coupled to end parts of the first and second blades, and configured to move the first and second blades by being rotated; and a motor coupled to one side of the link member, and configured to rotate the link member.

An effect that drive of one of a first magnetic driving unit and a second magnetic driving unit prevents a movement of the other magnetic driving unit is not generated to appropriately control movements of first opening and closing blades and second opening and closing blades. A blade opening and closing device includes a base body which includes an opening for transmitting light, a first magnetic driving unit which includes a first magnet and a first coil, a second magnetic driving unit which includes a second magnet and a second coil, first opening and closing blades which are moved by the first magnetic driving unit relative to the base body and to open and close the opening, and second opening and closing blades which are moved by the second magnetic driving unit relative to the base body and to open and close the opening. A magnetic flux direction of the first magnetic driving unit is opposite to a magnetic flux direction of the second magnetic driving unit.

A lens unit with a central axis is provided. The lens unit includes a fixed portion, a movable portion, and a first driving assembly. The fixed portion includes an outer frame and a bottom combined with the outer frame. The outer frame and the bottom are arranged along the central axis. The movable portion is movably connected to the fixed portion, and carries a lens with an optical axis. The central axis is not parallel to the optical axis. The first driving assembly is connected to the movable portion, and drives the movable portion to move relative to the fixed portion. The first driving assembly also includes a biasing element made of a shape memory alloy.

A lens unit with a central axis is provided. The lens unit includes a fixed portion, a movable portion, and a first driving assembly. The fixed portion includes an outer frame and a bottom combined with the outer frame. The outer frame and the bottom are arranged along the central axis. The movable portion is movably connected to the fixed portion, and carries a lens with an optical axis. The central axis is not parallel to the optical axis. The first driving assembly is connected to the movable portion, and drives the movable portion to move relative to the fixed portion. The first driving assembly also includes a biasing element made of a shape memory alloy.

An optical element driving mechanism is provided. The optical element driving mechanism includes a fixed part, a movable part, a driving assembly, and a sensing assembly. The movable part moves relative to the fixed part. The driving assembly drives the movable part to move relative to the fixed part. The sensing assembly senses the movement of the movable part.