| 摘要 |
PURPOSE:To increase the positioning accuracy of a magnetic head, by attaching a ferromagnetic material bar on a bobbin and thus suppressing the vibration of a carriage system. CONSTITUTION:A plural number of ferromagnric material bars 30 are attached equidistantly around the main body of a bobbin 5. Thus the magnetic force of a single direction is applied to each bar 30 to attract the bar 30 toward three magnets provided around the magnetic field in the gap of a voice coil motor magnetic circuit or toward a center yoke 2. This is equivalent to the fact that a reinforcing member is provided around the main body of the bobbin 5 to stretch the bobbin toward the outer or inner side. As a result, the circular vibration toward the radius of the bobbin 5 is suppressed significantly. |
