Brush assembly of cleaner

Abstract

A brush assembly of a cleaner includes a driving motor mounted at a cleaner main body, for generating a rotary force; a brush rotatably disposed at a suction opening formed at the cleaner main body; and a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring a rotary force of the driving motor to the brush, and protecting the driving motor by preventing transfer of a load generated at the brush to the driving motor. Accordingly, the driving motor can be continuously rotated even if the brush cannot be rotated by being caught by a stuff or the like, thereby preventing motor damage.

1 . A brush assembly of a cleaner comprising: 
 a driving motor mounted at a cleaner main body, for generating a rotary force;    a brush rotatably disposed at a suction opening formed at the cleaner main body; and    a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring a rotary force of the driving motor to the brush, and protecting the driving motor by preventing transfer of a load generated at the brush to the driving motor.    
   
   
       2 . The brush assembly of  claim 1 , wherein the driving force transfer device comprises: 
 a first magnet mounted at a rotary shaft of the driving motor; and    a second magnet mounted at a rotary shaft of the brush and disposed to face the first magnet so that an attractive force can work between itself and the first magnet.    
   
   
       3 . The brush assembly of  claim 2 , wherein the attractive force working between the first magnet and the second magnet is set to be smaller than the rotary force of the driving motor.  
   
   
       4 . The brush assembly of  claim 1 , wherein the driving force transfer device comprises: 
 a magnetic body mounted at a rotary shaft of the motor; and    a magnet mounted at a rotary shaft of the brush and disposed to face the magnetic body.    
   
   
       5 . The brush assembly of  claim 4 , wherein an attractive force working between the magnetic body and the magnet is set to be smaller than the rotary force of the driving motor.  
   
   
       6 . The brush assembly of  claim 1 , wherein the driving force transfer device comprises: 
 a magnet mounted at a rotary shaft of the driving motor; and    a magnetic body mounted at a rotary shaft of the brush and disposed to face the magnet.    
   
   
       7 . A brush assembly of a robot cleaner provided with a suction opening at the center of a bottom of a cleaner main body, performing a cleaning operation while moving for itself, and automatically charging a battery, comprising: 
 a driving motor mounted at the cleaner main body, for generating a rotary force;    a brush rotatably disposed at the suction opening; and    a driving force transfer device installed between the driving motor and the brush, rotating the brush by transferring the rotary force of the driving motor to the brush, and preventing transfer of a load generated at the brush to the motor.    
   
   
       8 . The brush assembly of  claim 7 , wherein the driving force transfer device comprises: 
 a first magnet mounted at a rotary shaft of the driving motor; and    a second magnet mounted at a rotary shaft of the brush and disposed to face the first magnet so that an attractive force can work between itself and the first magnet.    
   
   
       9 . The brush assembly of  claim 8 , wherein the attractive force working between the first magnet and the second magnet is set to be smaller than the rotary force of the driving motor.  
   
   
       10 . The brush assembly of  claim 7 , wherein the driving force transfer device comprises: 
 a magnetic body mounted at a rotary shaft of the motor; and    a magnet mounted at a rotary shaft of the brush and disposed to face the magnetic body.    
   
   
       11 . The brush assembly of  claim 10 , wherein the attractive force working between the magnetic body and the magnet is set to be smaller than the rotary force of the driving motor.  
   
   
       12 . The brush assembly of  claim 7 , the driving force transfer device comprises: 
 a magnet mounted at a rotary shaft of the driving motor; and    a magnetic body mounted at a rotary shaft of the brush and disposed to face the magnet.