Air shutter and radiating fan including the same

A radiating fan, comprising:

• a wind generating mechanism;
• and
• an air shutter attaching to one side of the wind generating mechanism and comprising:
• a holder comprising:
• a central hub,
• an outer frame sleeved outside the central hub and comprising two annular grooves, and
• a plurality of connecting pieces each connecting to the central hub and the outer frame, wherein a plane in which the connecting pieces are located is positioned between the two annular grooves;
• two compressible elastic members received in the two annular grooves;
• a plurality of blades with an equal number of the connecting pieces;
• and
• two cover plates located on opposing sides of the holder and configured for limiting positions of the two compressible elastic members;
• wherein, each of the plurality of blades is located between two adjacent connecting pieces and one end of the blade is pivotally connected to the central hub and another end of the blade is pivotally connected to the two compressible elastic members, and the blades are capable of rotating to change a distance between the two compression elastic members;
• wherein, in a windless state, a gap between adjacent two of the connecting pieces is closed by one of the blades, and when the windless state changes to a windy state, each of the plurality of blades is rotated by a wind force to increase the distance between the two compressible elastic members and area of the gap expands with the increase of the wind force;
• and
• wherein, when the windy state changes to the windless state, the distance between the two compressible elastic members decreases, and each of the plurality of blades is rotated by a resilient force of the two compressible elastic members to close the gap.