Cooling fan

Abstract

A cooling fan, which may be installed on a corresponding position of the cooling fins of a CPU or a cooling hole-plate of a computer mainframe, includes: a fan body, a fan frame and a fan impeller. The fan frame is circular in shape. The fan body is arranged along the outer circumference of the fan frame. The fan impeller is installed in the fan frame. A rubber layer, which is formed by secondary injection molding, is arranged at the outer surface of the fan body and the contact parts between the cooling fins and the upper and lower edges of the fan frame, respectively. Through holes are provided at the upper and lower parts of four end corners of the fan body, respectively, and rubber layers are also provided at the inner walls of the through holes.

1 . A cooling fan, which is installed at a corresponding position of a cooling element, comprising a fan body, a fan frame and a fan impeller, wherein the fan frame is circular in shape, the fan body is arranged along an outer circumference of the fan frame, and the fan impeller is installed in the fan frame, the cooling fan further comprising a rubber layer, which is formed by secondary injection molding, arranged at an outer surface of the fan body and contact parts between the cooling element and upper and lower edges of the fan frame, respectively. 
     
     
         2 . The cooling fan according to  claim 1 , wherein the cooling element is a set of cooling fins for a CPU in a computer mainframe. 
     
     
         3 . The cooling fan according to  claim 1 , wherein the cooling element is a cooling hole-plate of a computer mainframe. 
     
     
         4 . The cooling fan according to  claim 1 , wherein through holes are provided at upper and lower parts of four end corners of the fan body, respectively, and rubber layers are also provided at inner walls of the through holes, so that after secondary injection molding, outer edges of the through holes are made level with the corresponding upper and lower edges of the fan frame. 
     
     
         5 . The cooling fan according to  claim 2 , wherein an assembled cooling fan is fastened by a steel wire button to the corresponding positions of the set of cooling fins, wherein the contact parts between the cooling fan and the cooling fins are rubber layers that are formed by secondary injection molding. 
     
     
         6 . The cooling fan according to  claim 5 , wherein the four frames of the fan body are in the shape of a three-dimensional X, wherein the upper and lower parts of the end corners are parallel with each other; through holes are provided within the planes of the upper and lower parts of the end corners, respectively; and wherein supporting portions are provided between the upper and lower parts of the end corners, the supporting portions being integrally formed with the fan body. 
     
     
         7 . The cooling fan according to  claim 5 , wherein the four frames of the fan body are in the shape of a three-dimensional double U, wherein the U-shaped openings face the end corners of the fan body and the U-shaped openings of adjacent frames converge and are connected as one piece; the upper and lower parts of the end corners are parallel with each other; through holes are provided within the planes of the upper and lower parts of the end corners, respectively; and wherein supporting portions are provided between the upper and lower parts of the end corners, the supporting portions being integrally formed with the fan body. 
     
     
         8 . The cooling fan according to  claim 3 , wherein an assembled cooling fan is fastened by vibration absorbing screws to the cooling hole-plate of the computer mainframe, wherein through holes of the computer mainframe are provided on the cooling hole-plate and are co-axial with the corresponding through holes of the fan body; the vibration absorbing screws are provided with a conical portion and a clipping position; and wherein when fixing the assembled cooling fan, the conical portion sequentially passes the mainframe through holes, the lower through holes of the end corner of the fan body, the cooling hole-plate of the computer mainframe and the lower part of the end corner, and is clipped within the clipping position. 
     
     
         9 . The cooling fan according to  claim 8 , wherein the vibration absorbing screw is made of rubber. 
     
     
         10 . The cooling fan according to  claim 8 , wherein the fan body consists of four end corners disposed on the outer circumference of the fan frame at uniform intervals, wherein the upper and lower parts of the end corners being parallel with each other; the through holes of the fan body are provided within the planes of the upper and lower parts of the end corners, respectively; and wherein supporting portions are provided between the upper and lower parts of the end corners, the supporting portions being integrally formed with the fan body.