Patent ID: 9083131
Filing Date: 2015-07-14
Classification: H01R,H02K

Abstract:
1. A brush comprising: a brush holder extending substantially in a radial direction of a commutator; a brush accommodated in the brush holder with a gap between the brush holder and the brush, the brush including a brush-tip end, which comes into contact with the commutator, and a brush-rear end located on a side opposite to the brush-tip end; and a torsion spring, which urges the brush-rear end toward the commutator, wherein the brush holder includes a first inner side surface and a second inner side surface, which are separate from each other in an axial direction of the commutator, the torsion spring urges the brush toward the commutator by pressing a portion-to-be-pressed of the brush-rear end, and the portion-to-be-pressed is located at a position deviated in the axial direction of the commutator from a brush-center line as a center line of the brush, by urging the brush by the torsion spring, the brush-tip end is brought into contact with the first inner side surface and the brush-rear end is brought into contact with the second inner side surface, the commutator includes a first commutator end, which is a first end in the axial direction, and a second commutator end, which is a second end on a side opposite from the first commutator end, the first inner side surface and the second inner side surface are inclined such that as they approach the commutator, they approach the first commutator end, the portion-to-be-pressed of the brush-rear end is located near the first commutator end with respect to the brush-center line of the brush-rear end, and the brush comes into contact with the commutator near the second commutator end with respect to the brush-center line.