Patent ID: 8264108

Claim:
A brushless motor comprising: a shaft extending in a vertical direction along a rotation center axis, and arranged to rotate about the rotation center axis; a bearing member arranged to rotatably support the shaft; a rotor hub in a shape of a cup with a downward opening, and arranged to join together with the shaft; a rotor magnet arranged radially inside the rotor hub; a stator arranged radially inward of the rotor magnet and opposite the rotor magnet with a gap defined therebetween; and a housing including a cylindrical portion, wherein said stator is position radially outside of said cylindrical portion; wherein the stator includes an annular core back portion, a plurality of teeth extending radially outward from an outer circumference of the core back portion, and coils defined by a conductor wire wound around a separate one of the teeth; the cylindrical portion includes a contact portion and a coming-off preventing portion arranged above the contact portion on an outer circumference of the cylindrical portion; the core back portion includes a small-diameter opening defining portion and a large-diameter opening defining portion arranged above the small-diameter opening defining portion; the cylindrical portion is arranged radially inward of the core back portion; the stator is supported by the cylindrical portion with a lower surface of the core back portion arranged in contact with the contact portion and an upper surface of the small-diameter opening defining portion arranged in contact with the coming-off preventing portion; the bearing member is arranged radially inside the large-diameter opening defining portion; and the bearing member is arranged above the coming-off preventing portion.