Patent ID: 7671506
Filing Date: 2010-03-02
Classification: H01R

Abstract:
1. A brush apparatus comprising: a brush having a rectangular solid shape and coming into sliding contact with a commutator which is connected to an armature coil; and a brush holder that holds the brush, wherein the brush includes a pigtail having a plurality of lead wires tightly bonded into a flat shape, wherein the pigtail is embedded in the brush at a substantially widthwise center of a wider side thereof that extends orthogonally to a surface of the brush which comes into contact with the commutator in such a manner that the longitudinal side in cross-section of the pigtail extends in parallel with the surface of the brush which comes into contact with the commutator, wherein the brush holder includes: a brush holding member for storing the brush; a brush spring for pressing a surface of the brush opposite from the surface which comes into contact with the commutator against the commutator in order to bring the brush into sliding contact with the commutator, a base for holding the brush holding member and electrically connecting the same to a ground circuit, and a connection lug provided on the base, wherein the brush holding member includes a notch formed on a wider side thereof by trimming away the brush holding member from an upper end thereof for allowing a downward movement of the pigtail when the brush wears and hence is pressed downward, and wherein a distal end of the pigtail is connected to the connection lug.