Stopping structure of fan

Abstract

A stopping structure of a fan is described. An opening is opened on a surface of a frame, and a bearing support is disposed within the frame. A blade wheel is accommodated within the frame and pivoted to the bearing support. Then, a stopper is disposed at the frame corresponding to the opening, such that a distance between the stopper and the blade wheel is smaller than a distance between blades of the blade wheel and the frame. When the blade wheel moves outwards relative to the bearing support, the blade wheel is stopped by the stopper to prevent the blades from interfering with the frame, and a reactive force is generated at an axial center position of the blade wheel, so that an axle of the blade wheel is maintained on the same central axis as the bearing support when the axle restores an original position thereof.

1 . A stopping structure of a fan, comprising:
 a frame, comprising an opening opened on a surface thereof, wherein a bearing support corresponding to the opening is disposed within the frame;   a blade wheel, disposed within the frame, wherein the blade wheel comprises a hub and a plurality of blades annularly disposed on a peripheral edge of the hub, and the hub comprises an axle pivoted in the bearing support; and   a stopper, disposed at the frame corresponding to the opening, wherein the stopper is spaced apart from the hub by a first distance, the blades are spaced apart from the frame by a second distance, the first distance is smaller than the second distance, and when the blade wheel moves outwards relative to the bearing support, the hub is stopped by the stopper to prevent the blades from interfering with the frame, and a reactive force is generated at an axial center position of the hub, so as to maintain the axle on the same central axis as the bearing support when the axle restores an original position thereof.   
     
     
         2 . The stopping structure of a fan according to  claim 1 , wherein the stopper further comprises a bump corresponding to the hub, and the first distance is a distance between the bump and the hub. 
     
     
         3 . The stopping structure of a fan according to  claim 1 , wherein the hub further comprises a bump corresponding to the stopper, and the first distance is a distance between the bump and the stopper. 
     
     
         4 . The stopping structure of a fan according to  claim 1 , wherein the stopper further comprises at least one connecting rib, and the connecting rib is connected to the opening of the frame. 
     
     
         5 . The stopping structure of a fan according to  claim 1 , wherein the bearing support further comprises a bearing pivoted to the axle, a coil is disposed around an outer edge of the bearing support, and at least one magnet is disposed corresponding to the coil.