Patent ID: 8922089

Claim:
A direct-current motor armature, the direct-current motor being an 8-pole-10-slot-20-segment or 12-pole-15-slot-30-segment, the armature comprising: a rotation shaft pivotably supported by a yoke, the yoke having a plurality of magnetic poles; an armature core comprising an armature core body attached to the rotation shaft; a plurality of teeth attached to the rotation shaft and extending radially in radial directions; armature cores having a plurality of slots extending in an axial direction, the slots formed between the teeth; and a commutator provided on the rotation shaft adjacent to the armature cores and having a plurality of segments disposed in a circumferential direction, wherein the motor is a five-phase motor, a riser is formed by bending a part of each segment radially outward, every five segments having a same degree of electric potential is short-circuited by means of a short-circuiting wire wound around the riser under a state that the commutator and the armature are provided on the rotation shaft, a coil is connected electrically to the segments having a potential difference that is equal to a potential difference between the adjacent segments, the coil is wound around the teeth, the coil and the short-circuiting wire are together fixed to the riser.