Patent ID: 7732957

Claim:
A brushless motor comprising: a motor drive unit including a rotor rotatable about a rotational axis; a circuit board including a driving circuit arranged to drive the motor drive unit, the circuit board having an upper surface, a lower surface and a plurality of through holes formed in the upper surface and the lower surface; and a motor attachment plate including a plate-shaped base portion and plate-shaped fixing portions integral with the base portion, the base portion being arranged substantially parallel to the circuit board, the fixing portions being provided in a corresponding relationship with the through holes to fix the circuit board in place; wherein each of the fixing portions includes: a support portion arranged to make contact with a surface of the circuit board that faces the motor attachment plate to support the circuit board; an arm portion, extended from the support portion, bent in a direction that is parallel or substantially parallel to the rotational axis; and a protrusion portion, extended from the arm portion, inserted into the corresponding one of the through holes from the surface of the circuit board that faces the motor attachment plate, the protrusion portion having at least one overhang extension protruding from the corresponding one of the through holes; and the overhang extension of the protrusion is bent in a direction that is perpendicular or substantially perpendicular to the rotational axis.