SUPPORTING MECHANISM FOR LEAD SCREW SHAFT OF MOTOR FOR DRIVING MAGNETIC HEAD OF MAGNETIC RECORDER

摘要

PURPOSE:To reduce a bearing friction loss torque by providing a pivot ball bearing at the edge part of one side of a lead screw shaft and providing a bearing to support an outer diameter at other edge part. CONSTITUTION:A ball 4 is housed in a hole part 3 of the tip of one side of a lead screw shaft 1, and the ball 4 and a pivot ball bearing 5 housed and fixed to a hole 11 provided at a fitting frame 10 are connected. At other edge of the lead screw shaft 1, a bearing 6 to support the outer circumference is provided, further, at other edge part of the lead screw shaft 1, a slot 9 is provided at a shaft direction, a coil spring 12 is housed in the slot 9, a ball 13 is arranged to the outside of the coil spring 12 and a holding cover 14 provided at the outside of the ball 13 is brought into contact with the ball 13. Thus, the magnetic head position can be easily controlled correctly, and the energy necessary to drive a head carriage can be reduced.