Abstract: A hollow brushless motor is provided. The hollow brushless motor includes a hollow shape rotor to be rotatable about a rotation axis, a hollow shape stator spaced apart from the rotor by a distance in a direction of the rotation axis and arranged to face the rotor, and a first support to maintain a gap between the rotor and the stator, and arranged between the rotor and the stator to support the rotor and the stator such that the rotor rotates with respect to the stator.

Abstract: A lens driving module for driving a lens along an optical axis is provided. The lens driving module includes a stator having a hollow cylindrical shape through which the optical axis passes through and including coils, a rotator having a hollow shape through which the optical axis passes, mounted on an outer side of the stator, capable of rotating with respect to the stator with the optical axis as a center line, and including magnets facing the coils, and at least one of rotation connecting members connecting the rotator to the stator such that the rotator may rotate with respect to the stator to maintain a gap between the coils and the magnets.

Abstract: A lens driving module for driving a lens along an optical axis is provided. The lens driving module includes a stator having a hollow cylindrical shape through which the optical axis passes through and including coils, a rotator having a hollow shape through which the optical axis passes, mounted on an outer side of the stator, capable of rotating with respect to the stator with the optical axis as a center line, and including magnets facing the coils, and at least one of rotation connecting members connecting the rotator to the stator such that the rotator may rotate with respect to the stator to maintain a gap between the coils and the magnets.

Abstract: A hollow brushless motor is provided. The hollow brushless motor includes a hollow shape rotor to be rotatable about a rotation axis, a hollow shape stator spaced apart from the rotor by a distance in a direction of the rotation axis and arranged to face the rotor, and a first support to maintain a gap between the rotor and the stator, and arranged between the rotor and the stator to support the rotor and the stator such that the rotor rotates with respect to the stator.

Abstract: A power transmitting mechanism assembly including a supporting plate; a first roller, which is rotatably attached to the supporting plate; a first plate, which contacts a first end of the first roller and is arranged to be able to rotate with respect to the supporting plate; a power generating unit, which generates power for rotating the first plate when a signal is applied; a second plate, which is arranged to contact a second end of the first roller; and a friction changing unit, which is attached to at least one of the first roller, the first plate, and the second plate and changes friction of a portion of a contacting surface between the first roller and the first plate or friction of a portion of a contacting surface between the first roller and the second plate.

Abstract: A power transmitting mechanism assembly including a supporting plate; a first roller, which is rotatably attached to the supporting plate; a first plate, which contacts a first end of the first roller and is arranged to be able to rotate with respect to the supporting plate; a power generating unit, which generates power for rotating the first plate when a signal is applied; a second plate, which is arranged to contact a second end of the first roller; and a friction changing unit, which is attached to at least one of the first roller, the first plate, and the second plate and changes friction of a portion of a contacting surface between the first roller and the first plate or friction of a portion of a contacting surface between the first roller and the second plate.