Patent ID: 7755247

Claim:
A motor comprising: a motor housing having a cover portion and a cylindrical motor housing main body; a stator fixed in position on an inner side of the motor housing; a rotor rotatably provided on an inner side of the stator; a commutator provided on a rotation shaft of the rotor and rotating together with the rotor; a positive-pole-side brush one end portion of which is in contact with the commutator and another end portion of which is connected to a positive-pole-side lead wire; a negative-pole-side brush one end portion of which is in contact with the commutator and another end portion of which is connected to a negative-pole-side lead wire; and an insulating brush holding frame fixed in position on the inner side of the motor housing and having a positive-pole-side brush holding portion holding the positive-pole-side brush and a negative-pole-side brush holding portion holding the negative-pole-side brush, wherein the positive-pole-side brush holding portion and the negative-pole-side brush holding portion each curve about a circumference of the commutator; and wherein a thickness of an outer portion of the positive-pole-side brush holding portion in a circumferential direction of the commutator is greater than a thickness of an outer portion of the negative-pole-side brush holding portion in the circumferential direction of the commutator.