Patent ID: 8829757

Claim:
A motor comprising: 8 magnetic poles; an armature including 10 tooth sections; a commutator including 20 commutator segments; and a brush-set including 2 positive electrode brushes and 2 negative electrode brushes; wherein a hook-holding section arranged to hook-hold conductor wires is installed on each of the commutator segments; a group of coils is provided by a single conductor wire that has been wound onto each of the plurality of tooth sections and has been hooked onto the plurality of hook holding sections; the group of coils is defined by a concentrated winding of the single conductor wire; when each of the 10 tooth sections are respectively serially designated as first through tenth tooth sections in either a clockwise or counterclockwise direction starting from a certain predetermined tooth section, the winding starts at the first tooth section, and the single conductor wire is wound onto the fourth tooth section, the second tooth section, the fifth tooth section, the third tooth section, the sixth tooth section, the ninth tooth section, the seventh tooth section, and the tenth tooth section in this order, and the winding ends at the tenth tooth section; and a state in which the brushes of the brush-set are energized during operation of the motor is capable of being switched between at least two different modes.