To provide a cock power generator with the power generation efficiency improved.
The cock power generator is provided with a moving blade, installed in a water supply passage so that it can rotate around a center axis which is substantially parallel to the water supply passage; a magnet which shows a cylindrical shape, where a magnetic domain to which an N pole is magnetized and a magnetic domain to which an S pole is magnetized are formed alternately along a circumferential direction and which can integrally rotate with the moving blade; a coil arranged to confront with an end face in an axial direction of the magnet and a yoke which has a plurality of pole teeth, installed to be separated along the circumferential direction between the end face of the magnet and the coil and is formed of a magnetic object disposed to surround the coil. In the yoke, a counterbore, notched from one end side where the pole teeth are arranged, is disposed in a part confronted with the peripheral face part of the coil, and the pole teeth face the end face of the magnet so that they will always straddle the boundary of the magnetic domain, to which the N pole is magnetized and the magnetic domain, to which the S pole is magnetized.
HATAKEYAMA MAKOTO
ONODERA NAOYUKI
SATO TOMOKO
KUROISHI MASAHIRO
Hiroshi Ichikawa
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