A brushless motor, comprising: a printed circuit board having a plurality of locating holes therethrough; and an upper insulating bobbin including a plurality of locating bosses distributed along a circumference direction of an upper surface of the upper insulating bobbin, wherein each locating boss has a locating column projecting from a top surface thereof such that each locating column is inserted into a respective locating hole, and a plurality of terminal fixing blocks distributed along the circumference direction of an upper surface of the upper insulating bobbin, wherein the top surfaces of the locating bosses are higher than top surfaces of the terminal fixing blocks with respect to the upper surface of the upper insulating bobbin, wherein a bottom surface of the upper insulating bobbin includes a plurality of upper slot insulation portions configured to receive a corresponding portion of a stator, a lower end surface of the upper slot insulation portion being sloped to correct positional errors when mounted with the stator, and wherein the lower end surface of the upper slot insulation portion is sloped toward a center of the upper insulating bobbin, in particular, wherein an angle of the slope is 10o-60o. a printed circuit board having a plurality of locating holes therethrough; and an upper insulating bobbin including a plurality of locating bosses distributed along a circumference direction of an upper surface of the upper insulating bobbin, wherein each locating boss has a locating column projecting from a top surface thereof such that each locating column is inserted into a respective locating hole, and a plurality of terminal fixing blocks distributed along the circumference direction of an upper surface of the upper insulating bobbin, wherein the top surfaces of the locating bosses are higher than top surfaces of the terminal fixing blocks with respect to the upper surface of the upper insulating bobbin, wherein a bottom surface of the upper insulating bobbin includes a plurality of upper slot insulation portions configured to receive a corresponding portion of a stator, a lower end surface of the upper slot insulation portion being sloped to correct positional errors when mounted with the stator, and wherein the lower end surface of the upper slot insulation portion is sloped toward a center of the upper insulating bobbin, in particular, wherein an angle of the slope is 10o-60o. a plurality of locating bosses distributed along a circumference direction of an upper surface of the upper insulating bobbin, wherein each locating boss has a locating column projecting from a top surface thereof such that each locating column is inserted into a respective locating hole, and a plurality of terminal fixing blocks distributed along the circumference direction of an upper surface of the upper insulating bobbin, wherein the top surfaces of the locating bosses are higher than top surfaces of the terminal fixing blocks with respect to the upper surface of the upper insulating bobbin, wherein a bottom surface of the upper insulating bobbin includes a plurality of upper slot insulation portions configured to receive a corresponding portion of a stator, a lower end surface of the upper slot insulation portion being sloped to correct positional errors when mounted with the stator, and wherein the lower end surface of the upper slot insulation portion is sloped toward a center of the upper insulating bobbin, in particular, wherein an angle of the slope is 10o-60o. wherein the top surfaces of the locating bosses are higher than top surfaces of the terminal fixing blocks with respect to the upper surface of the upper insulating bobbin, wherein a bottom surface of the upper insulating bobbin includes a plurality of upper slot insulation portions configured to receive a corresponding portion of a stator, a lower end surface of the upper slot insulation portion being sloped to correct positional errors when mounted with the stator, and wherein the lower end surface of the upper slot insulation portion is sloped toward a center of the upper insulating bobbin, in particular, wherein an angle of the slope is 10o-60o.