| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a carbon brush for an electric machine which is small in ohmic loss and long in durability. Ž<P>SOLUTION: The carbon brush for the electric machine is constructed of a brush base material containing a resin bonded carbonaceous material formed by kneading graphite powder with a binder made of a thermosetting resin, the resin bonded carbonaceous material being cured and not carbonized, wherein a surface of the resin bonded brush base material 3 and the insides of fine pores of the surface are coated with electrically good conductive metal layers 1 by the electroless plating method, a hole for attaching a lead wire is formed on the coated brush base material 3, and the lead wire 4 is attached into the hole while being embedded with copper powder 5. A thickness of the electrically good conductive metal layer 1 is in a range of 3 to 10 μm. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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