Electric vacuum cleaner

Abstract

An electric vacuum cleaner comprises a vertical type cleaner body provided with a dust collection chamber a handle protrusively provided on an upper portion of the cleaner body, a suction nozzle provided on an lower portion of the cleaner body in such a manner as to communicate with the dust collection chamber being rotatable back and forth with respect to the cleaner body, and being contactable with a surface to be cleaned, an electric fan provided in the suction nozzle, and a rotary brush which is rotated by the electric fan and is built in the suction nozzle. A clutch mechanism which transmits and interrupts power to the rotary brush is provided between the rotary brush and the electric fan. The suction nozzle is rotatably provided on the cleaner body via a hinge mechanism. The clutch mechanism is coupled to the hinge mechanism by a link mechanism.

1 . An electric vacuum cleaner comprising: 
 a vertical type cleaner body provided with a dust collection chamber;    a handle protrusively provided on an upper portion of said cleaner body;    a suction nozzle provided on an lower portion of said cleaner body in such a manner as to communicate with said dust collection chamber being rotatable back and forth with respect to said cleaner body and being contactable with a surface to be cleaned;    an electric fan having a motor and provided in said suction nozzle;    a rotary brush which is rotated by said motor of said electric fan, and is built in said suction nozzle; and    a clutch mechanism which is provided between said rotary brush and said electric fan, and transmits and interrupts power to said rotary brush.    
   
   
       2 . The electric vacuum cleaner according to  claim 1 , wherein said suction nozzle is rotatably provided on said cleaner body via a hinge mechanism, and said clutch mechanism is coupled to said hinge mechanism by a link mechanism.  
   
   
       3 . The electric vacuum cleaner according to  claim 1 , further comprising a pulley which is provided on a driving side of said clutch mechanism, a first belt which is stretched over said pulley and an output shaft of said electric fan, a follower gear which is provided on a follower side of said clutch mechanism, and a second belt which is stretched over said follower gear and said rotary brush.  
   
   
       4 . The electric vacuum cleaner according to  claim 3 , wherein there are a pair of said rotary brushes, each having a coaxial interlocking gear, and a third belt which is stretched over said interlocking gears.  
   
   
       5 . The electric vacuum cleaner according to  claim 2 , wherein said link mechanism comprises a first joint member engaged with said hinge mechanism, a second joint member engaged with said clutch mechanism, and a link which links said first joint member to said second joint member.  
   
   
       6 . The electric vacuum cleaner according to  claim 5 , wherein said link comprises a tabular member formed in an approximately L shape, and is axially supported to said suction nozzle by a pin.  
   
   
       7 . The electric vacuum cleaner according to  claim 5 , further comprising a guide so provided in said suction nozzle as to support said second joint member.