Patent ID: 8513844

Claim:
A motor having a core configured to rotate around a shaft, a commutator configured to rotate together with the core, and a ring-shaped magnet surrounding the core, the motor further comprising: a casing for accommodating the commutator, the casing including an upper case and a lower case; a brush assembly including: a main body portion configured to move towards the commutator in a direction perpendicular to a rotational axis of the shaft by sliding along an inner surface of the lower case; a pair of brush pieces projecting from the main body portion, the pair of brush pieces being configured to slide by holding the commutator therebetween when the main body portion slides along the inner surface of the lower case; and a terminal exposed from the main body portion; an aligning unit configured to align the main body portion relative to the lower case by engaging the main body portion of the brush assembly with the lower case before the brush pieces come into contact with the commutator; and a guiding unit configured to guide the brush assembly in a direction perpendicular to the rotational axis of the shaft after the aligning unit aligns the main body portion relative to the lower case.