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 primary brush rotatably installed in the suction port and having a plurality of bristles arranged in a longitudinal direction thereof; a primary brush driving device for reciprocatingly rotating the primary brush within a range of a predetermined angle; and an auxiliary brush rotatably installed at one side of the primary brush and having a plurality of bristles arranged in a longitudinal direction thereof, for supplementing an operation of the primary brush with being rotated. According to this, an entire area occupied by the suction head can be evenly brushed, and brushed dust can be smoothly sucked.

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 primary brush rotatably installed in the suction port and having a plurality of bristles arranged in a longitudinal direction thereof;    a primary brush driving device for reciprocatingly rotating the primary brush within a range of a predetermined angle; and    an auxiliary brush rotatably installed at one side of the primary brush and having a plurality of bristles arranged in a longitudinal direction thereof, for supplementing an operation of the primary brush with being rotated.    
   
   
       2 . The suction head of  claim 1 , further comprising a rotational force transmitting unit for transmitting a rotational force of the fan motor to the auxiliary brush.  
   
   
       3 . The suction head of  claim 2 , wherein the rotational force transmitting unit is composed of: 
 a driving pulley connected to a motor shaft extended from the fan motor;    a driven pulley mounted at one side of the auxiliary brush; and    a belt for connecting the driving pulley and the driven pulley.    
   
   
       4 . The suction head of  claim 1 , further comprising: 
 a first suction duct having an inlet positioned corresponding to a direction of dust movement when the primary brush rotates in a forward direction; and    a second suction duct having an inlet positioned corresponding to a direction of dust movement when the primary brush rotates in a backward direction.    
   
   
       5 . The suction head of  claim 4 , 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.  
   
   
       6 . The suction head of  claim 5 , wherein the auxiliary brush is installed between the primary brush and the inlet of the second suction duct, and is rotated to brush dust on a floor towards the primary brush.  
   
   
       7 . The suction head of  claim 5 , wherein an outlet of the second suction duct is connected to the first suction duct.  
   
   
       8 . The suction head of  claim 1 , wherein the primary 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 primary brush so that the primary brush can be reciprocatingly rotated within a range of a predetermined angle.    
   
   
       9 . The suction head of  claim 8 , 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 primary 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.