An external magnetic field inverting apparatus for a magneto-optical disc apparatus.

摘要

The present invention relates to an external magnetic field inverting apparatus for a magneto-optical disc apparatus in which a permanent magnet (15) is used as external magnetic field generating means and a winding (25) is located so that upon supply of a current to that winding the said permanent magnet (15) can be rotated. A magnetic member (30) is located near the said permanent magnet (15) in such a manner that a magnetic flux generated from said winding (25) crosses that permanent magnet (15) with an inclination of a pretermined angle relative to an axis perpendicular to the longitudinal axis of the permanent magnet (15). Thereby the apparatus according to the invention can be reduced in cost, increased in reliability and miniaturized in size. <IMAGE>