| 摘要 |
PROBLEM TO BE SOLVED: To provide the electromagnetic driving gear which reduces the variation of the wear and the transfer force between a stator and a rotor stably for a long period. SOLUTION: A magnetic body 53 of a movable core 50 forms a rough-surfaced wall part 56 on the opposed side to a stator 41. The rough-surfaced wall part 56 forms an irregular asperity. The rough-surfaced wall part 56 on the peripheral part is covered with a plating layer part 54 by electroless plating. Further, the plating layer part 54 is covered by a lubrication layer part 55 including a lubrication particle 57. The lubrication particle 57 included in the lubrication layer part 55 is stored in the recess of the rough-surfaced wall part 56 formed by the magnetic body 53 of the movable core 50. Therefore, the lubrication particle 57 is supplied to the sliding part of the stator 41 and the movable core 50, even if the lubrication layer part 55 of the movable core 50 is worn while sliding the stator 41 with the movable core 50. Hereby, the wear of the stator 41 and the movable core 50 is reduced and the life is extended. COPYRIGHT: (C)2007,JPO&INPIT
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