Upright type vacuum cleaner

Abstract

An upright type vacuum cleaner is provided that includes a cleaner body having a body duct; a suction nozzle rotatably disposed at a lower portion of the cleaner body and having a brush duct; and a connecting duct having a smooth inner surface to connect the body duct with the brush duct so that when the cleaner body rotates with respect to the suction nozzle, the connecting duct allows the body duct to rotate with respect to the brush duct.

1 . An upright type vacuum cleaner, comprising:
 a cleaner body having a body duct;   a suction nozzle rotatably disposed at a lower portion of the cleaner body, the suction nozzle having a brush duct; and   a connecting duct having a smooth inner surface, the connecting duct being configured to connect the body duct with the brush duct so that when the cleaner body rotates with respect to the suction nozzle, the connecting duct allows the body duct to rotate with respect to the brush duct.   
   
   
       2 . The upright type vacuum cleaner of  claim 1 , wherein the cleaner body rotates on a first rotating axis with respect to the suction nozzle, and wherein the connecting duct is formed so that a rotating center of the connecting duct on which the body duct rotates with respect to the brush duct is located coaxially with the first rotating axis. 
   
   
       3 . The upright type vacuum cleaner of  claim 2 , wherein the body duct of the cleaner body comprises a center axis that is spaced apart from a center axis of the brush duct of the suction nozzle. 
   
   
       4 . The upright type vacuum cleaner of  claim 3 , wherein the connecting duct comprises:
 a first connecting pipe connected with the body duct; and   a second connecting pipe disposed at the suction nozzle, the second connecting pipe having a first end thereof connected with the brush duct and a second end thereof rotatably connected with the first connecting pipe.   
   
   
       5 . The upright type vacuum cleaner of  claim 4 , wherein the first connecting pipe comprises an expanding portion in which the second end of the second connecting pipe is inserted, and a sealing member disposed between the second connecting pipe and the expanding portion of the first connecting pipe. 
   
   
       6 . The upright type vacuum cleaner of  claim 5 , wherein the second end of the second connecting pipe comprises a fixing portion formed on an outer circumferential surface of the second end, the fixing portion being configured to fix the sealing member. 
   
   
       7 . The upright type vacuum cleaner of  claim 6 , wherein the sealing member comprises an O-ring. 
   
   
       8 . An upright type vacuum cleaner, comprising:
 a suction nozzle having a brush duct to fluidly communicate with a contaminants suction port;   a body supporting member rotatably disposed at the suction nozzle;   a cleaner body detachably disposed at the body supporting member, the cleaner body having a body duct; and   a connecting duct having a smooth inner surface, the connecting duct connecting the body duct with the brush duct so that when the body supporting member rotates with respect to the suction nozzle, wherein the connecting duct allows the body duct to rotate with respect to the brush duct.   
   
   
       9 . The upright type vacuum cleaner of  claim 8 , wherein the connecting duct comprises:
 a first connecting pipe disposed at the body supporting member;   a second connecting pipe disposed at the suction nozzle, and connected with the brush duct; and   a rotating portion formed between the first connecting pipe and the second connecting pipe to allow the first connecting pipe to rotate with respect to the second connecting pipe.   
   
   
       10 . The upright type vacuum cleaner of  claim 9 , wherein the rotating portion of the connecting duct comprises a center axis located coaxially with a first rotating axis on which the body supporting member rotates with respect to the suction nozzle. 
   
   
       11 . The upright type vacuum cleaner of  claim 10 , wherein the rotating portion comprises:
 an expanding portion formed at an end of the first connecting pipe or at an end of the second connecting pipe;   an inserting portion formed at the end of the second connecting pipe or at the end of the first connecting pipe to be inserted in the expanding portion; and   a sealing member disposed between the expanding portion and the inserting portion to seal between the expanding portion and the inserting portion.   
   
   
       12 . The upright type vacuum cleaner of  claim 11 , further comprising a fixing portion to fix the sealing member formed on an inner circumferential surface of the expanding portion or an outer circumferential surface of the inserting portion. 
   
   
       13 . The upright type vacuum cleaner of  claim 12 , wherein the sealing member comprises an O-ring. 
   
   
       14 . The upright type vacuum cleaner of  claim 10 , wherein the connecting duct is formed so that air entering from the brush duct flows parallel to the first rotating axis to the body duct.