Patent ID: 7242127

Claim:
A brush device comprising a brush and a spring, the brush including a brush arm made of carbon, which is substantially arc shaped-and which has a contact face that conducts electricity when in contact with a commutator, and a brush base mounted so as to rotate around a support post, the brush being mounted in a brush holder so that rotation around the support post puts a contact face in contact with the commutator, the spring impeling the brush toward the conmmutator, wherein one end of the support post at a face side of the brush base is formed with a hollow cylinder and the other end is formed with a projection, the projection of the support post is fixed into the brush holder by insert molding, a guide is formed on a part of the brush base, a recess is formed in the brush holder within which one end of a winding of the coil spring is stopped by the brush base and the other end is stopped by the brush holder, the coil spring and brush are placed in substantially the same plane in such a manner that a longitudinal direction of the coil spring matches a direction of a surface of the brush holder and the winding of the coil spring follows the shape of at least one of the guide and the recess, and the one end of the support post is fixed to the surface of the brush base by spreading the hollow cylindrical end of the support post.