Patent ID: 7199500

Claim:
A claw-pole electric generator comprising: a circumferentially arranged permanent magnet; a ring-shaped coil configured and arranged on an internal peripheral side of the permanent magnet to rotate relative to the permanent magnet; a yoke having a stator yoke portion disposed between the coil and the permanent magnet, and a core yoke portion magnetically linked to the stator yoke portion and disposed on an external periphery of the coil such that the yoke is rotatable relative to the permanent magnet; and a cover member covering at least part of an external peripheral surface of the yoke, the cover member being disposed between the yoke and the permanent magnet, and formed by heat-shrinking a cylindrical member made of a heat-shrinkable synthetic resin, the cover member includes a heat-shrinkable synthetic resin selected from the group consisting of vinyl chloride resin, fluorine resin, silicone resin and ethylene-propylene resin; the stator yoke portion including a plurality of first and second yoke sections disposed on opposite sides of the coil in an axial direction, respectively, with each of the first and second yoke sections having a plurality of plate-shaped pieces in a stacked arrangement.