Electric fan

Abstract

An electric fan includes a motor unit, a pair of opposite fan units, a bracket, a stand, and a rotation-enabling mechanism. The motor unit includes a motor having two opposite output shafts, and a motor casing surrounding the motor and having a bottom side that has two opposite end portions. The fan units are coupled respectively to and driven by the output shafts. The bracket has two opposite securing portions respectively secured to the end portions of the bottom side of the motor casing, and a supporting shaft connected to and disposed between the securing portions. The stand is pivotally connected to the supporting shaft. The rotation-enabling mechanism includes a driving unit mounted on the bracket, and a linkage connected pivotally to the stand and driven by the driving unit.

1 . An electric fan comprising: 
 a motor unit including 
 a motor having two opposite output shafts, and  
 a motor casing surrounding said motor and having a bottom side that has two opposite end portions;  
   a pair of opposite fan units coupled respectively to and driven by said output shafts;    a bracket disposed below said motor unit and having two opposite securing portions that are respectively secured to said end portions of said motor casing, and a supporting shaft that is connected to and that is disposed between said securing portions;    a stand pivotally connected to said supporting shaft; and    a rotation-enabling mechanism including a driving unit that is mounted on said bracket, and a linkage that is connected pivotally to said stand and that is connected to and driven by said driving unit so as to be rotatable together with said bracket and said motor unit relative to said stand.    
   
   
       2 . The electric fan as claimed in  claim 1 , wherein said bracket includes a top plate that has two opposite end portions which define respectively said securing portions of said bracket, and a middle portion that is disposed between said end portions of said top plate, said supporting shaft extending downwardly from said middle portion of said top plate, said bracket further including an L-shaped plate that has a vertical portion extending downwardly from one of said end portions of said top plate, and a horizontal portion extending from said vertical portion and cooperating with said vertical portion to define a recess therebetween, said driving unit being mounted in said recess.  
   
   
       3 . The electric fan as claimed in  claim 2 , wherein said driving unit includes a controller that is mounted on said horizontal portion of said L-shaped plate and that is received in said recess, and a cam that is connected pivotally to said linkage.  
   
   
       4 . The electric fan as claimed in  claim 1 , wherein said bracket further has a U-shaped portion that is disposed between and that is connected to said securing portions of said bracket, said supporting shaft extending downwardly from said U-shaped portion of said bracket, said bracket further including an L-shaped plate that has a vertical portion secured to said U-shaped portion, and a horizontal portion extending from said vertical portion and cooperating with said vertical portion to define a recess therebetween, said driving unit being mounted on said horizontal portion within said recess.  
   
   
       5 . The electric fan as claimed in  claim 1 , wherein said bracket further has a U-shaped portion having two opposite ends which are respectively connected to said securing portions of said bracket, and defining a recess therein, said supporting shaft extending downwardly from said U-shaped portion of said bracket, said driving unit being mounted in said recess in said U-shaped portion.  
   
   
       6 . The electric fan as claimed in  claim 1 , wherein said motor casing is formed with a pair of protrusions that protrude respectively from said end portions of said bottom side of said motor casing, said securing portions of said bracket being respectively secured to said protrusions.  
   
   
       7 . The electric fan as claimed in  claim 6 , further comprising fastening screws for securing said securing portions of said bracket to said protrusions on said end portions of said bottom side of said motor casing.