Patent ID: 6700247
Filing Date: 2004-03-02
Classification: G06K,H02K

Abstract:
A diskette incorporating a thin type permanent magnet generator comprisinga diskette case of a floppy magnetic disc shape, a disc-shaped rotor having a soft magnetic disc-shaped hub provided inside the diskette and caused to rotate around a rotational axis by an external drive mechanism, and a flat ring-shaped permanent magnet concentrically fitted to an end face of the hub; the permanent magnet being axially magnetized so as to have a plurality of magnetic poles of alternately different polarities in the circumferential direction on each end face thereof; and the magnetic poles on an end face of the permanent magnet being magnetically short-circuited by the hub, and the magnetic poles on the other end face serving as rotor magnetic poles, and a stator fitted to the diskette case having a plurality of magnetic pole teeth having on an end each of a plurality of stator magnetic poles that can face the rotor magnetic poles at the same pole intervals via an axial gap and extending radially outward from the state magnetic poles; the magnetic pole teeth being connected at the other end to each other by a soft magnetic yoke and having coils wound on the intermediate portions thereof; the ratio of generator thickness/diagonal length on the end face of the generator is not more than 6%.