Abstract: A stepping motor for use in a magnetic disc reproducing apparatus for causing radial scanning movement of a magnetic head relative to a magnetic disc having many picture information recorded on concentric tracks, comprises a casing, a rotor, stator coils to which current is supplied according to a sequence of phase cycles, and a rotor positions detector which includes two electrically-connected contactors mounted on the rotor, and an annular conductor pattern and an arcuate conductor pattern provided in the casing to make continuous and temporary contact with the respective contactors. The arcuate conductor pattern covers a range corresponding to an angle through which the rotor rotates in a predetermined one cycle among the phase cycles of current supply to the coils.

Abstract: A rotary magnetic sheet apparatus for recording and reproducing still picture information on and from a magnetic recording medium in the form of a magnetic sheet comprises a drive motor causing rotation of a magnetic sheet mounted at its center core on a drive shaft of the motor, a center-core pressing member disposed opposite to the drive shaft on the side nearer to the center core than the drive shaft so as to press the center core onto the drive shaft, and a member or members for mechanically connecting a movable part of the actuating switch to the center-core pressing member to cause operation of the center-core pressing member in response to manipulation of the actuating switch.

Abstract: A magnetic disc device applicable to an electronic still camera system or a reproducer in an electronic camera system, wherein a subject is still-photographed pure-electronically and recorded into a rotating magnetic disc, and the reproduction of an image is carried out by a television, a printer or the like.A lid of this magnetic disc device is provided with a regulating plate at a position opposed to a magnetic head, for disposing the magnetic disc along the magnetic head. The regulating plate is finely movably provided on the lid, and attracted and fixed by magnets, when the lid is closed, whereby, even if the regulating plate is finely movably provided such that the regulating plate can be positioned at a predetermined position, the regulating plate can be held unmovably at the time of the reproduction of the magnetic record when the lid is closed.