Patent ID: 7902732

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 a 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 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, at one area thereof, and another portion constituting the remaining area of the axially lower surface, the circuit board attaching portion of the axially lower surface is offset in the axially upward direction relative to said another portion of the axially lower surface such that the circuit board will not protrude in the axially downward direction beyond the level of said another portion of the axially lower surface, the 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 said another portion of the axially lower surface has a concavity therein such that said another portion of the axially lower surface of the base member constitutes a rim surrounding the concavity.