| 摘要 |
PROBLEM TO BE SOLVED: To obtain a brush that induces a favorable rectifying action to a commutator no matter which case of a cylindrical commutator, where a plurality of segments are arranged in its circumferential direction, and a planar commutator, where segments are arranged in its radial direction, it may be in. SOLUTION: In the brush 10, its one end is a sliding side end face 10A which slides on the segment of the commutator. In the sliding side end face 10A, its low resistance part 36 in its view in the direction of an arrow R is circular, and its high resistance part 35 is annular, and it is circular as a whole. That is, for the low resistance part 36, its cross section is circular, and for the high resistance part 35, its cross section is annular, and for the sliding side end face 10A, its cross section is circular. COPYRIGHT: (C)2009,JPO&INPIT
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