Patent ID: 7714469

Claim:
A base member for use in a motor rotatable about a center axis and having an armature arranged above the base member, comprising a bottom base portion extending in a radial direction, the bottom base portion having an axially lower surface facing in an axially downward direction, and an axially upper surface facing in an axially upward direction opposite the axially downward direction and disposed at such a position as to face a lower surface of the armature in the axial direction, wherein the axially lower surface includes a circuit board attaching portion to which a circuit board is to be attached, the circuit board attaching portion of the axially lower surface being offset in the axially upward direction relative to another portion of the axially lower surface such that the circuit board will not protrude in the axially downward direction beyond said another portion of the axially lower surface, the bottom base portion has at least one hole extending axially therein between the axially upper surface and the circuit board attaching portion of the axially lower surface, through which wire from the armature is to be led to the circuit board, and the axially upper surface has a first area juxtaposed in the axial direction with the circuit board attaching portion of the axially lower surface, and a second area offset in the axially downward direction relative to the first area.