Suction head of vacuum cleaner

Abstract

A suction head of a vacuum cleaner, comprises: a housing having a suction port through which dust on a floor is sucked by an operation of a fan motor; a brush rotatably installed in the suction port and having a plurality of bristles arranged in a longitudinal direction thereof; a brush driving device for reciprocatingly rotating the brush within a range of a predetermined angle; a first suction duct having an inlet positioned corresponding to a direction of dust movement when the brush rotates in a forward direction; and a second suction duct having an inlet positioned corresponding to a direction of dust movement when the brush rotates in a backward direction. Brushed dust can be properly sucked according to a reciprocating rotation direction of the brush, and thereby a cleaning function of the cleaner can be increased.

1 . A suction head of a vacuum cleaner, comprising: 
 a housing having a suction port through which dust on a floor is sucked by an operation of a fan motor;    a brush rotatably installed in the suction port and having a plurality of bristles arranged in a longitudinal direction thereof;    a brush driving device for reciprocatingly rotating the brush within a range of a predetermined angle;    a first suction duct having an inlet positioned corresponding to a direction of dust movement when the brush rotates in a forward direction; and    a second suction duct having an inlet positioned corresponding to a direction of dust movement when the brush rotates in a backward direction.    
   
   
       2 . The suction head of  claim 1 , wherein the brush driving device is composed of: 
 a driving motor for providing a driving force; and    a driving force transmitting unit for transmitting a driving force of the driving motor to the brush so that the brush can be reciprocatingly rotated within a range of a predetermined angle.    
   
   
       3 . The suction head of  claim 2 , wherein the driving force transmitting unit is composed of: 
 a rotary link fixed to a motor shaft of the driving motor and concentrically rotated with the motor shaft;    a hinge bracket installed at one side of an outer circumferential surface of the brush; and    a connecting rod having one end hingedly connected to the rotary link at a position eccentric from a rotation center of the rotary link and having another end hingedly connected to the hinge bracket.    
   
   
       4 . The suction head of  claim 1 , wherein the inlet of the first suction duct is arranged at a rear side of the suction port, and the inlet of the second suction duct is arranged at a front side of the suction port and extended along an upper circumference of the suction port.  
   
   
       5 . The suction head of  claim 4 , wherein an outlet of the second suction duct is connected to the first suction duct.  
   
   
       6 . The suction head of  claim 5 , wherein a guide portion is formed at the outlet of the second suction duct, for guiding air passing through the second suction duct toward the first suction duct.  
   
   
       7 . The suction head of  claim 6 , wherein both surfaces of the guide portion are curvedly formed.  
   
   
       8 . The suction head of  claim 6 , wherein the guide portion is formed by protruding from a wall forming the second suction duct.  
   
   
       9 . The suction head of  claim 4 , wherein the inlet of the first suction duct is curvedly formed toward the suction port.  
   
   
       10 . The suction head of  claim 4 , wherein a width in right and left directions of the inlet of the second suction duct is substantially same as a width in right and left directions of the suction port.  
   
   
       11 . The suction head of  claim 10 , wherein a width in right and left directions of the second suction duct is gradually decreased from the inlet toward the outlet.  
   
   
       12 . The suction head of  claim 10 , wherein a width in front and rear directions of the second suction duct is gradually decreased towards a right side or a left side of the second suction duct.