Up-right type vacuum cleaner

Abstract

The present invention relates to an up-right type vacuum cleaner having a weight compensation unit to share weight of main body. The up-right type vacuum cleaner includes a brush assembly having a pair of wheels, a main body being rotatably disposed to the brush assembly, a spiral spring being disposed at a connecting part of one side of the brush assembly, and a spring wrap reel being disposed at the connecting part of one side of the main body corresponding to the spiral spring and on which one end of the spiral spring is fixed, wherein the spiral spring gets loosen and wound round the spring wrap reel as the main body angles downwards.

1 . An up-right type vacuum cleaner, comprising: 
 a brush assembly having a pair of wheels;    a main body being rotatably disposed to the brush assembly;    a spiral spring being disposed at a connecting part at one side of the brush assembly; and    a spring wrap reel being disposed at the connecting part at one side of the main body corresponding to the spiral spring, the spring wrap reel having one end of the spiral spring fixed thereto;    wherein the spiral spring gets loosen and wound around the spring wrap reel as the main body is angled downwards with respect to a vertical axis.    
   
   
       2 . The up-right type vacuum cleaner of  claim 1 , further comprising: 
 a second spiral spring being disposed at a second connecting part at the other side of the brush assembly; and    a second spring wrap reel being disposed at the second connecting part at the other side of the main body corresponding to the second spiral spring.    
   
   
       3 . The up-right type vacuum cleaner of  claim 2 , wherein the spring wrap reel and the second spring wrap reel are disposed on the main body in front of rotation shafts of the pair of wheels.  
   
   
       4 . The up-right type vacuum cleaner of  claim 3 , wherein the spiral spring and the second spiral spring are disposed at the brush assembly below and behind the rotation shafts of the pair of wheels.  
   
   
       5 . The up-right type vacuum cleaner of  claim 1 , wherein the connecting part comprises: 
 a pair of hinge shafts disposed at a bottom of the main body; and    a pair of hinge grooves disposed in the brush assembly to support the pair of hinge shafts.    
   
   
       6 . The up-right type vacuum cleaner of  claim 5 , wherein the spring wrap reel and the second spring wrap reel are disposed at the pair of hinge shafts, respectively.  
   
   
       7 . The up-right type vacuum cleaner of  claim 1 , wherein the spring wrap reel has a diameter with a ratio to the diameter of the spiral spring of substantially  2 : 1 .  
   
   
       8 . An up-right type vacuum cleaner, comprising: 
 a brush assembly;    a main body;    a connecting part rotatably connecting the main body to the brush assembly so that the main body is moveably between a vertical position and a horizontal position; and    a first weight compensating unit having a spiral spring on the brush assembly and a spring wrap reel on the main body, the spiral spring having one end fixed to the spring wrap reel,    wherein the spring wrap reel rotates in a first direction as the main body is moved from the vertical position to the horizontal position so that the free end is wound around the spring wrap reel and the spring wrap reel rotates in a second direction as the main body is moved from the horizontal position to the vertical position so that the free end is unwound from the spring wrap reel.    
   
   
       9 . The up-right type vacuum cleaner of  claim 8 , further comprising a second weight compensating unit.  
   
   
       10 . The up-right type vacuum cleaner of  claim 8 , further comprising a pair of wheels on the brush assembly, the pair of wheels rotating about rotation shafts, respectively.  
   
   
       11 . The up-right type vacuum cleaner of  claim 10 , wherein the spring wrap reel is on the main body in front of the rotation shafts.  
   
   
       12 . The up-right type vacuum cleaner of  claim 10 , wherein the spiral spring is on the brush assembly below and behind the rotation shafts.  
   
   
       13 . The up-right type vacuum cleaner of  claim 8 , wherein the spring wrap reel has a diameter with a ratio to the diameter of the spiral spring of substantially  2 : 1 .  
   
   
       14 . The up-right type vacuum cleaner of  claim 8 , wherein the brush assembly has a front portion that is not lifted up from a cleaning floor until the main body is substantially in the horizontal position.