Protective cover for fan

Abstract

Protective cover for a fan includes a center pole and two protecting members connected to opposite ends of the center pole. Each protecting member includes an outer frame, a plurality of connecting poles connected to the center pole and the outer frame, and a plurality of protecting bars connected to the connecting poles and arranged between the center pole and the outer frame. Each connecting pole defines a plurality of locking holes. The distance from the locking holes of each connecting pole to the center pole is different.

What is claimed is: 
     
         1 . A protective cover for a fan, comprising:
 a center pole;   two protecting members connected to opposite ends of the center pole, each protecting member comprising an outer frame;   a plurality of connecting poles connected to the center pole and the outer frame, each connecting pole defining a plurality of locking holes; and   a plurality of protecting bars connected to the connecting poles and arranged between the center pole and the outer frame;   wherein the distance from the locking holes of each connecting pole to the center pole is different.   
     
     
         2 . The protective cover of  claim 1 , wherein a cross-section of the protecting bars of each protecting member are circular; and the diameters of the protecting bars are different. 
     
     
         3 . The protective cover of  claim 1 , wherein a perimeter of the outer frame of each protecting member is rectangular; and the connecting poles are connected to the center pole and four corners of the outer frame. 
     
     
         4 . The protective cover of  claim 1 , wherein the locking holes of each connecting pole are arranged along a lengthwise direction of the connecting pole. 
     
     
         5 . A fan module, comprising:
 a fan comprising a board, the board defining a plurality of mounting holes;   a protective cover comprising:   a center pole;   two protecting members connected to opposite ends of the center pole, each protecting member comprising an outer frame;   a plurality of connecting poles connected to the center pole and the outer frame, each connecting pole defining a plurality of locking holes; and   a plurality of protecting bars connected to the connecting poles and arranged between the center pole and the outer frame;   wherein a plurality of fasteners extends through the mounting holes and engages in the corresponding locking holes of the connecting poles.   
     
     
         6 . The fan module of  claim 5 , wherein a cross-section of the protecting bars of each protecting member are circular; and the diameters of the protecting bars are different. 
     
     
         7 . The fan module of  claim 5 , wherein a perimeter of the outer frame of each protecting member is rectangular; and the connecting poles are connected to the center pole and four corners of the outer frame. 
     
     
         8 . The fan module of  claim 5 , wherein the locking holes of each connecting pole are arranged along a lengthwise direction of the connecting pole. 
     
     
         9 . A fan module, comprising:
 a first fan comprising a first board, the first board defining a plurality of first mounting holes;   a second fan smaller than the first fan, the second fan comprising a second board, the second board defining a plurality of second mounting holes;   a protective cover comprising:   a center pole;   two protecting members connected to opposite ends of the center pole, each protecting member comprising an outer frame;   a plurality of connecting poles connected to the center pole and the outer frame, each connecting pole defining a plurality of locking holes; and   a plurality of protecting bars connected to the connecting poles and arranged between the center pole and the outer frame, each connecting pole defining a plurality of locking holes;   wherein the distance from the locking holes of each connecting pole to the center pole is different, a plurality of first fasteners extends through the first mounting holes and engages in the corresponding locking holes of the connecting poles, and a plurality of second fasteners extends through the second mounting holes and engages in the corresponding locking holes of the connecting poles.   
     
     
         10 . The fan module of  claim 9 , wherein a cross-section of the protecting bars of each protecting member are circular; and the diameters of the protecting bars are different. 
     
     
         11 . The fan module of  claim 9 , wherein a perimeter of the outer frame of each protecting member is rectangular; and the connecting poles are connected to the center pole and four corners of the outer frame. 
     
     
         12 . The fan module of  claim 9 , wherein the locking holes of each connecting pole are arranged along a lengthwise direction of the connecting pole.