Patent ID: 7812497

Claim:
An armature comprising: a commutator; an armature core that is rotatable together with the commutator and includes a plurality of teeth, which are arranged one after another at generally equal angular intervals; and a plurality of windings, each of which is wound around corresponding two or more of the plurality of teeth and is connected to the commutator, wherein: each circumferentially adjacent two of the plurality of windings partially circumferentially overlap with each other; a total number of the plurality of windings is an even number; the plurality of windings is divided into a first winding group and a second winding group; the windings of the first winding group are arranged one after another at generally equal angular intervals without circumferentially overlapping with each other; and the windings of the second winding group are arranged one after another at generally equal angular intervals without circumferentially overlapping with each other and are wound separately from the windings of the first winding group; and each of the windings of the first winding group is diametrically opposed to and is generally parallel to a corresponding one of the windings of the second winding group.