Novel fan blade of a ceiling fan

Abstract

The present invention relates to novel fan blade of a ceiling fan, wherein whole or partial perimeter of the blades was designed to project outwardly, for example, the cross section of the outwardly perimeter of the fan blade can be presented in a shape of circular arc, oval, taper with circular arc, obliquity with circular arc, truncated taper, truncated oblique or taper with circular arc in which two sides of the projecting base have a raised bench. A comparison test showed that, the rotational speed and air volume of the novel fan blade according to the present invention is 15-24% and 5-10% greater than those of the traditional fan blades respectively, therefore resulting in saving of materials and energy.

1 . A fan blade structure for a ceiling fan comprising: 
 A fan blade; and    A mounting bracket to which one end of the fan blade is mounted and by which the fan blade is locked to a motor; if necessary, the fan blade may be directly mounted to the motor, characterized in that whole or partial perimeter of the fan blade is made in an outwardly projecting shape.    
   
   
       2 . The fan blade of  claim 1 , wherein the cross section of the outwardly projecting perimeter of the fan blade is in circular arc shape.  
   
   
       3 . The fan blade of  claim 2 , wherein that the radius of the circular arc (R 1 ) is 1.0-5.0 mm.  
   
   
       4 . The fan blade of  claim 1 , wherein the cross section of the outwardly projecting perimeter of the fan blade is in the shape of taper with circular arc or in oval shape.  
   
   
       5 . The fan blade of  claim 4 , wherein the radius of the circular arc (R 2 ) is 1-5 mm, and the taper angle (a 1 ) is 10-60 degree, preferably 25 degree.  
   
   
       6 . The fan blade of  claim 1 , wherein the cross section of the outwardly projecting perimeter of the fan blade is in the shape of obliquity with circular arc.  
   
   
       7 . The fan blade of  claim 6 , wherein the radius of the circular arc (R 3 ) is 1-5 mm, the obliquity (α 2 ) is 10-60 degree, preferably 25 degree.  
   
   
       8 . The fan blade of  claim 1 , wherein the cross section of the outwardly projecting perimeter of the fan blade is in the truncated taper shape.  
   
   
       9 . The fan blade of  claim 8 , wherein that the taper angle (α 3 ) is 10-60 degree, and the truncated width W 1  is 1-5 mm, preferably 3 mm.  
   
   
       10 . The fan blade of  claim 1 , wherein that the cross section of the outwardly projecting perimeter of the fan blade is in the truncated oblique shape.  
   
   
       11 . The fan blade of  claim 10 , wherein the obliquity (α 4 ) is 10-60 degree, and the truncated width (W 2 ) is 1-5 mm, preferably 3 mm.  
   
   
       12 . The fan blade of  claim 4 , wherein the cross section of the outwardly projecting perimeter of the fan blade is in the shape of taper with circular arc, in which the radius of the circular arc (R 4 ) is 1-5 mm, and the taper angle (αS) is 10-60 degree, preferably 25 degree; two sides of the projecting base have a raised bench (d) respectively, the height of which is 0.01-2 mm, preferably d is 0.05 mm.  
   
   
       13 . The fan blade of  claim 1 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       14 . The fan blade of  claim 2 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       15 . The fan blade of  claim 3 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       16 . The fan blade of  claim 4 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       17 . The fan blade of  claim 5 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       18 . The fan blade of  claim 6 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       19 . The fan blade of  claim 7 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       20 . The fan blade of  claim 8 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       21 . The fan blade of  claim 9 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       22 . The fan blade of  claim 10 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       23 . The fan blade of  claim 11 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.  
   
   
       24 . The fan blade of  claim 12 , wherein the fan blades are made of wood plates, plywood, decorative fiberboard or other complex wooden board, or plastic or other resin materials.