Patent ID: 6870290

Claim:
A direct current motor comprising: an armature having a plurality of teeth equally spaced apart in a circumferential direction and a plurality of coils wound on the teeth in a distributed winding form, each of the coils being wound on a predetermined number of the teeth; and magnets each of which extends in a circumferential direction and faces the teeth, wherein the magnet includes a main part, which extends a first angular interval corresponding to an angle of spacing between two circumferential end teeth of the predetermined number of teeth, and wherein the magnet includes an extension part that is connected to the main part at a location at which each of the teeth arrives after passing along the main part and extends in the circumferential direction a second angular interval corresponding to an angle of spacing between adjacent two of the teeth, the extension part corresponding to a commutating interval and having a thickness in the radial direction that gradually decreases from the main part in a rotating direction of the armature.