JPS6479968A - Motor - Google Patents

Abstract

PURPOSE:To make a motor thin in size by rotatably bearing a rotating shaft at its one edge by means of a first shaft bearing part, and simultaneously, holding the rotating shaft so that it can maintain a vertical position by means of a magnetic repulsing force in a disk-shaped part to extend in a diameter direction from the rotating shaft. CONSTITUTION:A rotor is composed by forming a disk-shaped part 2 to extend in the diameter direction in being unified with a rotating shaft 1, and a rotor magnet 3 in which N and S poles are alternately magnetized in a prescribed interval is fixed on the lower surface of the disk 2. A coil 9 is provided to be face to a magnet 3 in a proper angle interval on a substrate 8, and the rotating shaft 1 is rotated by an attracting force and the repulsing force between the magnet 3 and coil 9. A shaft bearing member 6 is provided on the substrate 8, a cone recessed part 7 is formed at the upper edge, a cone recessed part 4 is formed also at the lower edge of the shaft 1, a steel ball 5 is made to intervene between the recessed parts 7 and 4, and the shaft 1 is made rotatable. An annular permanent magnet 10 is fixed in the peripheral part on the disk 2 upper surface, a permanent magnet 11 is also fixed on the lower surface of a magnet shaft bearing and holding member 12, both magnetics 10 and 11 are made into the S pole and S pole or the N pole and N pole, and the repulsing force is always made to work.