Patent ID: 8356381

Claim:
A structure for automatically rotating a spiral rod, the structure comprising: the spiral rod composed essentially of a rod body, the rod body having an end extended with an extension; a rotating element mounted around the extension of the spiral rod and having an inner wall circumferentially provided with teeth; a torsion spring mounted around the extension of the spiral rod; a retaining ring mounted around a distal end of the extension of the spiral rod; a base connected to an end of the rotating element such that the extension of the spiral rod is located in a receiving cavity of the base; and a pulling element provided on a side of the base and having an end configured for pressing against the teeth in the rotating element; wherein a dusting cloth mounted around the spiral rod and the rotating element is turned into a spiral shape along the spiral rod by rotating the rotating element, the torsion spring generating a restoring torque while the rotating element is being rotated, the pulling element pressing against the teeth in the rotating element and thereby keeping the dusting cloth in the spiral shape once the rotating element is no longer rotated; and when the pulling element is moved away from the teeth of the rotating element, the rotating element automatically rotates in a reverse direction due to the restoring torque of the torsion spring and thereby brings the dusting cloth to a flat shape, allowing the dusting cloth to be removed from the spiral rod for replacement.