Vacuum cleaner with controllable brush

Abstract

A vacuum cleaner comprises a vacuum cleaner main body having a vacuum resource and a dust-collecting receptacle for the drawn dust; a suction part main body connected with the vacuum cleaner main body in fluid-communication; a rotating brush mounted to the suction part main body; a driving pulley mounted to the rotating brush; an idle pulley disposed adjacent to the driving pulley; a belt located on one of the driving pulley or the idle pulley, and on an axis of the vacuum resource; a belt guide unit having a belt guide member moved between the first position connecting the belt with the driving pulley and the second position connecting the belt with the idle pulley; and a belt guide member controller for moving the belt guide member to one of the first position and the second position.

1 . A vacuum cleaner comprising: 
 a vacuum cleaner main body having a vacuum resource and a dust-collecting receptacle for the drawn dust;    a suction part main body connected with the vacuum cleaner main body in fluid-communication therewith;    a rotating brush mounted to the suction part main body;    a driving pulley mounted to the rotating brush;    an idler pulley disposed adjacent to the driving pulley;    a belt located on one of the driving pulley or the idler pulley, and on an axis of the vacuum resource;    a belt guide unit having a belt guide member moved between the first position connecting the belt with the driving pulley and the second position connecting the belt with the idler pulley; and    a belt guide member controller for moving the belt guide member to one of the first position and the second position.    
   
   
       2 . The vacuum cleaner according to  claim 1 , wherein the belt guide unit further comprises: 
 a spring for biasing the belt guide member toward the first position.    
   
   
       3 . The vacuum cleaner according to  claim 2 , wherein the belt guide member controller is a belt control knob rotatably mounted to the suction part main body and for moving the belt guide member to one of a first position or a second position by the contact with the belt guide member when the belt control knob is rotated.  
   
   
       4 . The vacuum cleaner according to  claim 3 , wherein the belt control knob comprises: 
 a knob part exposed to the suction part main body and rotatably mounted to the main body, and a cam member configured as a half cylinder,    wherein the cam member is contacted with the belt guide member when the knob part is located on a certain position, and for moving the belt guide member to the second position.    
   
   
       5 . The vacuum cleaner according to  claim 1 , further comprising: 
 a cam member contacted with the belt guide member to prevent the belt guide member from moving to the first position when the cleaner main body is substantially upright,    wherein the cleaner main body is inclinably mounted to the suction part main body.    
   
   
       6 . The vacuum cleaner according to  claim 5 , wherein the belt guide member comprises: 
 a first member of which one end restricts and moves the belt to one of the first position or the second position, and the other end is attached to the suction part main body;    a second member connected with the first member and extended to the cleaner main body by a certain length, and when the cleaner main body is substantially upright, the second member is contacted with the cam member of the cleaner main body to prevent the first member from moving to the first position.    
   
   
       7 . The vacuum cleaner according to  claim 2 , wherein the belt guide member controller is: 
 a button unit mounted to the suction part main body and for moving the belt guide member to one of the first position or the second position by a button operation.    
   
   
       8 . The vacuum cleaner according to  claim 7 , wherein the button unit comprises: 
 a button exposed to the suction part main body;    a press member contacted with a lower portion of the button, and moved to the press direction of the button according to the movement of the press operation of the button;    a return spring contacted with a lower portion of the press member; and    a lever of which one end is located on a lower portion of the press member, and the other end is attached to the belt guide member,    wherein the lever is moved according to the movement of the lower portion of the press member to move the belt guide member to the first position or the second position.    
   
   
       9 . The vacuum cleaner according to  claim 8 , wherein the button unit further comprises: 
 a stop spring located on the return spring, and for preventing the press member from further moving to the press direction when the press member is located on a certain position; and    a housing for at least the return spring and the stop spring.