Stator unit, motor, and fan motor

A stator unit covered with a resin, the stator unit comprising:

• a stator core that includes an annular core back which is disposed around a central axis extending in an up-and-down direction which is parallel to an axial direction and a plurality of teeth which protrude outwards in a radial direction from the annular core back;
• a coil that is defined by a conducting wire wound around each of the plurality of teeth;
• a circuit board that is disposed below the stator core in the axial direction;
• and
• an insulator that covers at least a portion of each of the plurality of teeth, wherein the insulator includes:
• a cylindrical portion, which surrounds the central axis, below the stator core in the up-and-down direction, and
• a circumferential-direction positioning portion that protrudes outwards in the radial direction from a radially outer circumferential surface of the cylindrical portion,
• at least a portion of the circuit board and the circumferential-direction positioning portion are directly opposed in a circumferential direction extending about the central axis such that a side surface of the circuit board that is parallel to the up-and-down direction and a side surface of the circumferential-direction positioning portion that is parallel to the up-and-down direction are able to come in contact with each other in the circumferential direction at a position radially outward from the radially outer circumferential surface of the cylindrical portion,
• all portions of the circumferential-direction positioning portion are positioned above a lowermost end of the cylindrical portion,
• the cylindrical portion and the circumferential-direction positioning portion are defined by a single member, and
• an inner circumferential surface of the circuit board contacts the cylindrical portion.