Fan and cooling apparatus

A fan comprising:

• an impeller rotatable about an axis extending in a first direction;
• a motor to rotate the impeller;
• and
• an integrally molded member, comprising:
• a housing for supporting the motor, comprising a frame member extending in a second direction perpendicular to the first direction, the frame member having an outer periphery including a first linear side and a second linear side parallel to the first linear side;
• a first holding arm having a first surface extending in the first direction from the first linear side;
• a second holding arm having a second surface extending in the first direction from the second linear side, the first surface being parallel to the second surface;
• a first catch projection extending in the second direction from a first lower end of the first surface toward the second surface;
• and
• a second catch projection extending in the second direction from a second lower end of the second surface toward the first surface, the first catch projection being opposed to and parallel to the second catch projection;
• wherein an imaginary surrounding wall extends to surround the outer periphery, the imaginary surrounding wall being perpendicular to the second direction,
• wherein the first and second catch projections are located outside the imaginary surrounding wall, and
• wherein a line extending from the first and second catch projections along the first direction is not blocked by any other portion of the integrally molded member.