Vacuum cleaner and a suction brush assembly thereof

Abstract

A vacuum cleaner having an upper casing, a lower casing, and an extension pipe connector, and a brush assembly for the vacuum cleaner. The brush assembly comprises a casing constructing a body of the brush assembly, an extension pipe connector connected to the casing, and a locking unit for releasably connecting the casing and the extension pipe connector to each other. The locking unit omits at least one bolt connector, thereby simplifying the structure and assembly procedure, and fewer parts are used in accordance with the invention.

1 . A brush assembly for a vacuum cleaner, comprising: 
 a casing assembly including an upper casing and a lower casing;    an extension pipe connector connected at a rear of the casing assembly; and    a locking unit formed on the casing assembly and the extension pipe connector to releasably connect the casing assembly to the extension pipe connector.    
   
   
       2 . The brush assembly of  claim 1 , wherein the locking unit further comprises: 
 a locking rib formed on at least one of the lower or upper casing or the extension pipe connector; and    a rib receiving space formed in at least the other one of the lower or upper casing or on the extension pipe connector.    
   
   
       3 . The brush assembly of  claim 2 , wherein the locking rib is formed on the extension pipe connector, and the rib receiving space is formed in the upper or lower casing.  
   
   
       4 . The brush assembly of  claim 3 , wherein a locking projection is formed in the rib receiving space, and the locking rib has a locking groove for receiving the locking projection, and 
 the locking projection engages the locking groove by the insertion of the locking rib in the rib receiving space.    
   
   
       5 . The brush assembly of  claim 3 , wherein the locking rib extends as a flange on both sides of the extension pipe connector, and the rib receiving space is formed in each side of the upper casing.  
   
   
       6 . The brush assembly of  claim 1 , further comprising: 
 a hook is formed on a front of one of the upper casing or the lower casing; and    a hook recess is formed on the other one of the upper casing or the lower casing for engagement with the hook.    
   
   
       7 . The brush assembly of  claim 1 , wherein the upper and the lower casings respectively comprise at least one fastening boss disposed at a rear portion of the casing assembly.  
   
   
       8 . A vacuum cleaner comprising: 
 a cleaner body having a suction force generating part;    an extension pipe for directing dust and air toward the cleaner body;    an extension pipe connector connected to the extension pipe;    a casing assembly connected to the extension pipe for drawing in dust on a surface being cleaned; and    a locking unit formed on the casing assembly and the extension pipe connector to releasably connect the casing assembly and the extension pipe connector to each other.    
   
   
       9 . The vacuum cleaner of  claim 8 , wherein the locking unit further comprises: 
 a locking rib formed on at least one of the casing assembly or the extension pipe connector; and    a rib receiving space formed in at least the other one of the casing assembly or the extension pipe connector.    
   
   
       10 . The vacuum cleaner of  claim 9 , wherein the locking rib is formed on the extension pipe connector, and the rib receiving space is formed in the casing assembly.  
   
   
       11 . The vacuum cleaner of  claim 10 , wherein the rib receiving space has a locking projection therein and the locking rib has a locking groove for receiving the locking projection, and 
 the locking projection engages the locking groove by the insertion of the locking rib into the rib receiving space.