| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a brush motor in which the pressing force to a commutator, incident to wear of a brush, can be held with only a torsion coil spring, and stable rotation drive can be obtained over a long term with a small size.SOLUTION: In a brush motor including a rotor, a commutator 9 provided in the rotor, a brush 5 in contact with the commutator 9, and a torsion coil spring 7 pressing one end face of the brush 5, the torsion coil spring 7 is provided with a plurality of protrusions 37, 39 in contact with one end face of the brush 5, so that the plurality of protrusions 37, 39 press one end face of the brush 5 in order, as the turning angle of the torsion coil spring 7 changes.</p> |
