Patent ID: 7508102

Claim:
A brushless motor comprising: a housing including a cylindrical bearing holder; a bearing portion disposed inside the bearing holder; a stator including an insulator, and a stator core having a plurality of teeth and coils, wherein each of the coils is wound around a corresponding one of the teeth, the stator being fixed to an outer surface of the bearing holder; a rotor with a rotary magnet fixed thereto, the rotor being supported in a rotatable manner about a rotational axis by the bearing portion, the rotary magnet being opposed to the stator in a radial direction perpendicular to the rotational axis; a circuit board disposed axially below the stator and electrically connected to the stator, wherein the circuit board has a central hole defining a plurality of connecting portions and a plurality of escape holes connected at the connecting portions to the central hole, the connecting portions being isolated from each other, the bearing holder being fitted into the central hole, lower portions of the coils of the stator being placed in the escape holes, respectively, wherein the insulator comprises inner projection portions disposed at the connecting portions, and inner portions disposed between adjacent inner projection portions when viewed from the below of the insulator, wherein the inner projection portions are fitted into the escape holes, wherein the inner portions face the upper surface of the circuit board at circumferential portions of the central hole.