Motor with commutator and brushes with contact portions

A motor comprising:

• a magnet;
• a plurality of teeth opposing the magnet;
• a plurality of coils;
• a commutator including a plurality of segments, wherein the number of the plurality of segments is twice the number of the plurality of teeth;
• and
• a plurality of brushes, each of the plurality of brushes including a contact portion in contact with one or more of the plurality of segments in a circumferential direction, wherein the number of the plurality of brushes is two,
• wherein for each coil of the plurality of coils:
• the coil extends over and is wound around two teeth of the plurality of teeth,
• a winding direction of the coil around one tooth of the two teeth is opposite to a winding direction of the coil around the other tooth of the two teeth, such that when a current is applied to the coil, the current flows clockwise around the one tooth and counter-clockwise around the other tooth, and
• in the circumferential direction, the coil wound around the one tooth is connected to one segment of two adjacent segments of the plurality of segments, and the coil wound around the other tooth is connected to the other segment of the two adjacent segments.