Ceiling Fan

Abstract

A ceiling fan includes a fan unit and a plurality of blade units connected with the fan unit. Each of the blade units includes an upper blade, a lower blade combined with the upper blade, and a light source located between the upper blade and the lower blade. Thus, each of the blade units is made of a plastic material to decrease the cost of fabrication of the ceiling fan and to reduce the weight of the ceiling fan.

1 . A ceiling fan, comprising:
 a fan unit; and   a plurality of blade units connected with the fan unit; wherein:   each of the blade units includes:   an upper blade;   a lower blade combined with the upper blade; and   a light source located between the upper blade and the lower blade.   
     
     
         2 . The ceiling fan of  claim 1 , wherein the upper blade of each of the blade units is made of a transparent plastic material. 
     
     
         3 . The ceiling fan of  claim 1 , wherein the lower blade of each of the blade units is made of a transparent plastic material. 
     
     
         4 . The ceiling fan of  claim 1 , wherein:
 the upper blade of each of the blade units has a side provided with at least one reinforcing strip; and   the lower blade of each of the blade units has a side provided with at least one reinforcing channel combined with the reinforcing strip of the upper blade.   
     
     
         5 . The ceiling fan of  claim 4 , wherein the reinforcing channel of the lower blade of each of the blade units is combined with the reinforcing strip of the upper blade by ultrasonic waves. 
     
     
         6 . The ceiling fan of  claim 1 , wherein:
 the upper blade of each of the blade units has an edge provided with a flange; and   the lower blade of each of the blade units has an edge provided with a groove combined with the flange of the upper blade.   
     
     
         7 . The ceiling fan of  claim 6 , wherein the groove of the lower blade of each of the blade units is combined with the flange of the upper blade by ultrasonic waves. 
     
     
         8 . The ceiling fan of  claim 1 , wherein the light source of each of the blade units is mounted on the lower blade. 
     
     
         9 . The ceiling fan of  claim 1 , wherein the light source of each of the blade units is covered by the upper blade. 
     
     
         10 . The ceiling fan of  claim 1 , wherein the light source of each of the blade units is light emitting diode (LED) lamp. 
     
     
         11 . The ceiling fan of  claim 1 , wherein the light source of each of the blade units has multiple colors to enhance the aesthetic quality of each of the blade units. 
     
     
         12 . The ceiling fan of  claim 1 , wherein:
 each of the blade units has a first end and a second end and has a thickness that is increased gradually from the first end to the second end thereof; and   each of the blade units is designed by an aerodynamic principle to have a tapered shape with a variable thickness, so as to reduce an electro-mechanical load, to increase its rotation speed, and to stabilize a downward air current.