| 摘要 |
PURPOSE:To clearly separate an N-pole, an S-pole and a neutral zone as well as to easily obtain a ring magnet at a lower cost than a separated magnet by a method wherein pair of magnetizing members are formed facing each other, and a magnetizing work is performed in the state wherein the material to be magnetized is pinched between said magnetizing members. CONSTITUTION:The material to be magnetized is pinched by magnetizing members 10A and 10A'. After this pinching work has been finished, a power source switch is turned ON, and a current is applied to magnetizing coils 5 and 5'. This current begins to run (semi-black circle symbol mark) from the lower side toward the upper side of the terminal surface of the upper first winding of a coil 5a for a protruded part 4a, and it runs (X) mark) toward the lower side from the upper side of the terminal surface of the cross-section on the reverse side of the magnetizing coil 5. When the current runs as above-mentioned, an S-pole appears on the lower surface 13 of the protruded part 4a. On the other hand, as a current runs to the protruded part 4a' located at the lower part facing the protruded part 4a, an N-pole appears on the upper surface 14 of the protruded part 4a' of the lower side magnetizing member 10A', and an S-pole appears on the lower side. |
