Abstract: A magnetic head is provided at its front end with respect to the surface of a magnetic disk with a stepped portion to cause a vortex of air stream so as to take dust away from the disk surface.

Abstract: A magnetic disk drive includes a braking mechanism for controlling a braking force to the arm to position the magnetic head over a magnetic disk. The braking force, which is normally not applied to the magnetic head arm, is applied to the head arm when the magnetic head leaves a region which is somewhat smaller than the data recording region.

Abstract: A magnetic disc apparatus includes a magnetic disc drive assembly on a base for driving a magnetic disc, a magnetic head supporting assembly disposed on the base for supporting and moving a magnetic head with respect to the magnetic disc for magnetic recording and reproducing and a control circuit for controlling the head supporting assembly. The head supporting assembly includes a rotary actuator, an actuator arm connected to the rotary actuator to swing the head along the surface of the disc in the radial direction thereof, a resilient suspension arm extending from one end of the actuator arm in the longitudinal direction thereof, for resiliently supporting at the extending end thereof a magnetic head.

Abstract: A magnetic disc apparatus including a magnetic recording disc having at least two tracks formed thereon and a magnetic head assembly comprising a rotary shaft, an actuator arm connected to said rotary shaft, suspension arms mounted on the actuator arm and magnetic heads, each of which is mounted on one end of a corresponding suspension arm for magnetic recording and reproducing on the disc, the suspension arms being mounted on one end of the actuator arm in the longitudinal direction thereof, and the mounting distance and angle of one of the suspension arms relative to the other are determined on the basis of the thermal coefficient of the material of the disc, and the thermal coefficient of the material and the length of the actuator arm and the suspension arms, whereby the distance between the head and that between the tracks vary at substantially the same rate as a function of changes in temperature, so that no positional separation of the heads with respect to the tracks occurs.

Abstract: A fixed magnetic disk device having a spindle for rotating a disk and an actuator for moving a magnetic head, which comprises a housing having a trapezoidal or triangular shape with two openings on its sides at right angles, one of the openings being provided with a mounting flange for supporting both ends of the spindle, and the other opening adapted to receive the actuator, and a pair of covers flanged to both the openings.

Abstract: A CSS-type fixed magnetic disk apparatus is disclosed which has a magnetic disk with a landing zone on which no positional information is recorded. A swinging arm actuator which supports a magnetic head has a plate mounted on it which is subjected to wind pressure produced by the rotation of the disk. When the rotational speed of the disk reaches a certain level, the wind pressure acting on the plate rotates the actuator outwards so that the magnetic head is automatically moved from the landing zone into the data zone of the disk. When the magnetic head is in the data zone, the position of the magnetic head is controlled by servo control using a voice coil motor.