LINEAR DRIVING DEVICE AND INFORMATION RECORDING AND REPRODUCING DEVICE USING THE SAME

PURPOSE:To prevent mechanical resonance and to enable stable velocity control over a wide frequency band by arranging the center of gravity of a movable body and a contact point between the movable body and a linear guide so as to be almost included in a plane passing through the effective coiling part of a driving coil. CONSTITUTION:When a current flows to a coil 21 positioned in a magnetic field, driving force in the direction of an arrow A is applied to a carriage 15 and an objective lens 9 is moved in the radial direction of an optical disk 7 along guide rails 13 and 13. In such a case, the surface wobbling and eccentricity of the optical disk 7 are corrected by a pickup head supporting mechanism 17 and information are recorded and reproduced. On the other hand, since the position of the driving force, namely, an upper side 21a of the coil 21, where the driving force is generated, is almost coincident in an axial line Y, the generation of the mechanical vibration such as pitching, etc., is suppressed to be small. Thus, the stable velocity control can be executed over the wide frequency band.