Patent ID: 7543312

Claim:
An optical pickup device comprising: a bobbin including an upper surface, at which first and second object lenses are mounted, an opened lower surface, and first and second side surfaces supported by a supporting unit, the first and second side surfaces being opposite to each other; a first focus coil and a first tracking coil mounted at a third side surface of the bobbin; a second focus coil and a second tracking coil mounted at a fourth side surface of the bobbin, which is opposite to the third side surface; and magnets disposed opposite to the first and second focus coils and the first and second tracking coils, wherein the first and second object lenses are mounted on the upper surface of the bobbin to support irradiation of a laser beam onto different types of optical media having different recording densities for data recording and/or reproduction; wherein the third side surface of the bobbin has a first closed surface formed at one side part thereof and a first opening formed at the other side part thereof, and the fourth side surface of the bobbin has a second closed surface, which is diagonally opposite to the first closed surface, and a second opening, which is diagonally opposite to the first opening, and wherein the first focus coil and the first tracking coil are mounted at the first closed surface, and the second focus coil and the second tracking coil are mounted at the second closed surface.