| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of parts of an electromagnetic coil without making a magnetic field unstable, which is developed on the end of a coil yoke. SOLUTION: A plurality of coil windings 33a, 33b having different diameters are separately arranged on a single coil yoke 40 of almost disc shape, and a notch part 41 for guiding magnetic fluxes is formed on a section located between the adjacent coil windings 33a, 33b of an outer surface of the coil yoke 40. The developed magnetic fluxes on the adjacent coil windings 33a, 33b flowing through the coil yoke 40 are rectified by the notched part 41 for guiding the magnetic fluxes in the vicinity of the outer surface of the coil yoke 40, and are maintained so as to be resistant to being mutually mixed. COPYRIGHT: (C)2003,JPO
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