Fan

A fan comprising:

• a stationary portion;
• a rotating portion rotatably supported by the stationary portion;
• and
• a plurality of blades arranged on an outer circumference of the rotating portion to generate a flow of air by rotation of the rotating portion;
• wherein
• the stationary portion includes:
• a stator;
• a bearing housing arranged on an inside of the stator, and defined by a molded metal integral one-piece member;
• a bearing portion arranged in the bearing housing;
• and
• abase portion made of molded resin and arranged to support the bearing housing;
• the rotating portion includes:
• a rotor holder having a cylindrical or substantially cylindrical shape with a cover;
• a rotor magnet arranged on a radially outer side of the stator and on an inner side of an inner circumferential surface of the rotor holder;
• and
• a shaft connected to the cover of the rotor holder and inserted into the bearing portion;
• the bearing housing includes:
• a cylindrical portion;
• and
• a protruding portion expanding radially outwards from a lower portion of the cylindrical portion;
• the cylindrical portion includes, on an outer circumferential surface, at least one groove portion extending in an axial direction and arranged in a circumferential direction;
• and
• the at least one groove portion is joined to a region on a lower side of the protruding portion along a side of a connecting position between the cylindrical portion and the protruding portion such that a resin positioned on an upper side of the protruding portion as a portion of the base portion, a resin positioned on a lower side, and a resin existing in the at least one groove portion are all continuously provided with one another.