| 摘要 |
A moving core includes a magnetic body having a rough face-shaped wall portion at a side facing a stationary core, a plated layer portion provided on the magnetic body and including a micro concave and convex portion on the surface layer of the plated layer portion, and a lubricating layer portion provided so as to cover the plated layer portion to store lubricating particles in the concave portions of the plated layer portion. A clearance between adjacent convex portions of the micro concave and convex portion is smaller than a clearance between adjacent convex portions of concavity and convexity of the plated layer portion. The lubricating particle is larger than the clearance between the adjacent convex portions of the micro concave and convex portion and smaller than the clearance between adjacent convex portions of the plated layer portion.
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