Cleaner head

Abstract

The present invention relates to a cleaner head including: a front housing and a rear housing disposed side by side on front and rear sides thereof respectively, the rear housing having an air outlet formed thereon; a front brush rotatably disposed on the front housing in such a manner as to be exposed from the underside of the front housing; a rear brush rotatably disposed the rear housing in such a manner as to be exposed from the underside of the rear housing; driving motors built in the rear housing to rotate the front brush and the rear brush through a power transmission mechanism; a lifting unit disposed on one side of the rear housing to move up and down the front housing with respect to the rear housing in a hinged manner; and a sensing part disposed on any one of the front housing and the rear housing and a part to be sensed disposed on the other, wherein when the front housing is stretched out with respect to the rear housing, rotating power is transferred to the front brush from the corresponding driving motor, and when the front housing is lifted, the rotating power transferred to the front brush cuts off to stop the rotation of the front brush.

1 . A cleaner head comprising:
 a front housing and a rear housing disposed side by side on front and rear sides thereof respectively, the rear housing having an air outlet formed thereon;   a front brush rotatably disposed on the front housing in such a manner as to be exposed from the underside of the front housing;   a rear brush rotatably disposed on the rear housing in such a manner as to be exposed from the underside of the rear housing;   driving motors built in the rear housing to rotate the front brush and the rear brush through a power transmission mechanism; and   a lifting unit disposed on one side of the rear housing to move up and down the front housing with respect to the rear housing in a hinged manner,   wherein when the front housing is stretched out with respect to the rear housing, rotating power is transferred to the front brush from the driving motor, and when the front housing is lifted, the rotating power to the front brush cuts off to stop the rotation of the front brush.   
     
     
         2 . The cleaner head according to  claim 1 , further comprising a sensing part disposed on any one of the front housing and the rear housing and a part to be sensed disposed on the other. 
     
     
         3 . The cleaner head according to  claim 2 , wherein any one of the sensing part and the part to be sensed is disposed on the inner side of one side frame of the front housing, and the other is disposed on one side surface of the rear housing, so that when the front housing is stretched out with respect to the rear housing, the sensing part and the part to be sensed are facingly arranged close to each other. 
     
     
         4 . The cleaner head according to  claim 2 , wherein the sensing part is a hall sensor and the part to be sensed is a magnet. 
     
     
         5 . The cleaner head according to  claim 2 , wherein the sensing part is a light receiving sensor and the part to be sensed is a light source. 
     
     
         6 . The cleaner head according to  claim 1 , wherein on-off switches are disposed between the front housing and the rear housing respectively. 
     
     
         7 . The cleaner head according to  claim 1 , wherein the lifting unit comprises:
 a housing frame disposed on one side of the rear housing;   a driving and rotating piece rotatably coupled to the housing frame, coupled to one side of the front housing, and having first gear teeth formed on at least a portion of a periphery thereof;   an intermediate gear rotatably coupled to the housing frame and having second gear teeth engaging with the first gear teeth;   a locking and supporting piece extended from the intermediate gear in a direction of a rotating shaft of the intermediate gear;   a rotating and locking piece rotatably coupled to the housing frame and intermittently engageable with the locking and supporting piece; and   a spring connected at one end thereof to the driving and rotating piece and at the other end thereof to the housing frame.   
     
     
         8 . The cleaner head according to  claim 7 , wherein the locking and supporting piece has a locking threshold part formed thereon in a circumferential direction thereof, and the rotating and locking piece has a hook formed on one end thereof in such a manner as to be lockable on the locking threshold part. 
     
     
         9 . The cleaner head according to  claim 7 , wherein the lifting unit further comprises an operating pedal hinge-movable up and down with respect to the housing frame in such a manner as to come into contact with the rotating and locking piece to allow the rotating and locking piece to be reciprocatingly hinge-movable to the housing frame. 
     
     
         10 . The cleaner head according to  claim 7 , wherein one end of the spring is connected to the driving and rotating piece by means of a load connecting piece. 
     
     
         11 . The cleaner head according to  claim 10 , wherein the driving and rotating piece and the load connecting piece are coupled to each other in a hinge-movable manner. 
     
     
         12 . The cleaner head according to  claim 9 , wherein the housing frame has a hinge part extended in a direction toward the longitudinal center of the cleaner head in such a manner as to be hinge-coupled to the operating pedal. 
     
     
         13 . The cleaner head according to  claim 12 , wherein the hinge part has hinge grooves open upward on top thereof, and the operating pedal has a hinge pin disposed on the front top side thereof in such a manner as to be hinge-coupled to the hinge grooves. 
     
     
         14 . The cleaner head according to  claim 12 , wherein the rotating and locking piece has a locking groove formed on one end thereof in such a manner as to be open on the underside thereof, and the operating pedal has a locking protrusion extended laterally from the front lower end thereof in such a manner as to be inserted into the locking groove. 
     
     
         15 . The cleaner head according to  claim 13 , wherein a compression spring is connected between a point spaced downward from the hinge grooves of the housing frame and a point spaced downward from the hinge pin of the operating pedal. 
     
     
         16 . The cleaner head according to  claim 7 , wherein a damping gear is rotatably coupled to the housing frame in such a manner that the damping gear is engaged with the intermediate gear. 
     
     
         17 . The cleaner head according to  claim 7 , wherein the driving and rotating piece comprises a first coupling portion protruding from the outer surface thereof in such a manner as to have the same center as the rotary shaft of the rear brush and a second coupling portion formed spaced apart from the first coupling portion, and the front housing comprises a third coupling portion and a fourth coupling portion formed on one side end thereof in such a manner as to be coupled correspondingly to the first coupling portion and the second coupling portion.