Patent ID: 7824115

Claim:
A camera module comprising: a lens mount; a lens unit received in the lens mount, the lens unit comprising a lens barrel and a lens received therein; a magnet unit comprising at least one magnet mounted around the lens unit; a printed circuit board-based Rogowski coil fixed around the lens barrel, establishing an induced magnetic field when an electric current is applied thereto, the induced magnetic field of the printed circuit board-based Rogowski coil interacting with a magnetic field of the at least one magnet of the magnet unit to generate a magnetic force telescoping the lens unit with the printed circuit board-based Rogowski coil; and a blade spring fixed around the lens barrel, the blade spring comprising a first elastic element and a second elastic element spaced from each other, and at least two ribs, each of the first and the second elastic elements comprising an inner frame and an outer frame, the at least two ribs interconnected between the inner frames and the outer frames of the first and the second elastic elements respectively, the at least two ribs each comprising a moveable end connected with the lens unit and an opposite fixed end, the moveable ends moving together with the lens unit with respect to the fixed ends to cause the at least two ribs to distort and generate an elastic force during the telescopic movement of the lens unit, the lens unit stopping at a focal position when the magnetic force and the elastic force come to a balance; wherein each of the first and the second elastic elements forms a connecting pin on the inner frame, and the printed circuit board-based Rogowski coil forms a first pad and a second pad thereon for electrically connecting with the connecting pins of the first and the second elastic elements respectively.