Patent ID: 7841530

Claim:
A read head comprising: a light emitting member outputting a predetermined laser beam to a data recording portion; a light receiving member receiving a return beam reflected by the data recording portion and detecting data included in the return beam; a movable section mounting the light emitting member and the light receiving member thereon; a fixed section, including: a fixed member; and a support mechanism swingably supporting the movable section; and a driving mechanism swinging the movable section with respect to the fixed section, wherein the driving mechanism includes: a magnetic field generator disposed on one of the movable section and the fixed section; and a magnetic driver disposed on the other of the movable section and the fixed section, wherein the magnetic field generator includes: a first yoke having a first base portion and a plurality of first arm portions protruding outwardly from the first base portion; a second yoke having a second base portion and a plurality of second arm portions protruding outwardly from the second base portion; and a magnet disposed between the first base portion and the second base portion, the first arm portions and the corresponding second arm portions being opposed to each other; wherein the magnetic driver includes a plurality of coils, and wherein each of the second arm portions is disposed in corresponding one of the coils with a movement margin.