Patent ID: 8441164

Claim:
An outer rotor motor comprising: a stator comprising: a stator core having a plurality of teeth that extend outward in a radial direction of the stator core; coils each including a winding portion formed by winding a wire; and insulators retaining the coils and connected to each other in an annular configuration such that the teeth are inserted into the insulators, each of the insulators comprising: a body portion around which the wire is wound; and an outer peripheral flange provided at an outer end of the body portion in the radial direction; and a rotor comprising: a rotor holder; and a rotor yoke fixed to an inner peripheral surface of the rotor holder; the stator and the rotor being arranged to face each other with a gap between the stator and the rotor in the radial direction; and each of the insulators being provided with an auxiliary tooth portion on at least one of two axial ridge portions, the axial ridge portions including bonding portions between the body portion and the outer peripheral flange that face side surfaces of corresponding tooth among the teeth in a circumferential direction, the auxiliary tooth portion comprising: a rotor-facing surface facing the rotor; and a tooth-contacting surface contacting one of the side surfaces in the circumferential direction, wherein the auxiliary tooth portion has a substantially triangular columnar shape including an inclined surface connecting the rotor-facing surface and the tooth-contacting surface to each other.