Vacuum cleaning device

Abstract

A vacuum cleaning device which includes a body and an extension pipe assembly. The body includes a fan motor that generates an inhalation force, a dust collecting unit that collects dust, and wheels for driving the body. The extension pipe assembly includes an inhalation nozzle that inhales air and an extension pipe that guides air inhaled through the inhalation nozzle. The extension pipe assembly is rotatably coupled to the body so that a load of the body and a load of the extension pipe assembly are dispersed into the wheels and the inhalation nozzle and are supported on a ground. Since a load of the vacuum cleaning device is not transferred to a user, usage conveniences can be improved, and an aesthetic sense can be improved with a simple and discriminative design.

What is claimed is: 
     
         1 . A vacuum cleaning device comprising:
 a body comprising a dust collecting unit that collects dust, and wheels for driving the body; and   an extension pipe assembly comprising an inhalation nozzle that inhales air and an extension pipe that guides air inhaled through the inhalation nozzle, the extension pipe assembly being rotatably coupled to the body so that a load of the body and a load of the extension pipe assembly are dispersed into the wheels and the inhalation nozzle and are supported on a ground.   
     
     
         2 . The vacuum cleaning device of  claim 1 , wherein the body further comprises:
 a body hinge portion that protrudes so that the body is capable of being coupled to the extension pipe assembly, and   the extension pipe assembly comprises an extension pipe hinge portion that protrudes so as to be adjacent to an axial direction of the body hinge portion.   
     
     
         3 . The vacuum cleaning device of  claim 2 , wherein:
 the body hinge portion comprises a hinge shaft accommodation portion that is formed to be recessed in the axial direction, and   the extension pipe hinge portion comprises a hinge shaft portion that protrudes in the axial direction so that the hinge shaft portion is capable of being accommodated in the hinge shaft accommodation portion.   
     
     
         4 . The vacuum cleaning device of  claim 3 , further comprising a connection hose that perforates the extension pipe hinge portion so as to guide air of the extension pipe assembly toward the body. 
     
     
         5 . The vacuum cleaning device of  claim 4 , wherein the extension pipe hinge portion further comprises a host accommodation portion that accommodates the connection hose and a drawing port formed on a circumferential surface of the extension pipe hinge portion so that the connection hose of the hose accommodation portion is capable of being drawn toward an outer portion of the extension pipe hinge portion. 
     
     
         6 . The vacuum cleaning device of  claim 5 , wherein the body comprises an insertion port which is formed to correspond to the circumferential surface of the extension pipe hinge portion and through which the connection hose is inserted. 
     
     
         7 . The vacuum cleaning device of  claim 3 , wherein the extension pipe hinge portion further comprises a first channel formed in the extension pipe hinge portion so as to guide air of the extension pipe assembly toward the body, the first channel having an outlet formed at the hinge shaft portion. 
     
     
         8 . The vacuum cleaning device of  claim 7 , wherein the body hinge portion further comprises a second channel formed in the body hinge portion so as to communicate with the first channel, the second channel having an inlet formed at the hinge shaft accommodation portion. 
     
     
         9 . The vacuum cleaning device of  claim 1 , wherein the body further comprises an upper body coupled to the extension pipe assembly and a lower body that is coupled to the upper body so as to be moved forward and backward so that the body is capable of being extended. 
     
     
         10 . The vacuum cleaning device of  claim 1 , wherein the body further comprises a wheel mounting portion on which the wheels are mounted and which has a shape of a ring that is perforated. 
     
     
         11 . The vacuum cleaning device of  claim 10 , wherein the body further comprises a discharge port through which air from which dust is filtered by the dust collecting unit, is discharged, the disparage port being formed at an inner side of the wheel mounting portion so as to discharge air into an inner empty space of the wheel mounting portion. 
     
     
         12 . The vacuum cleaning device of  claim 11 , wherein the body further comprises an air cleaning unit that is disposed between the dust collecting unit and the discharge port so as to purify air from which dust is filtered by the dust collecting unit, again. 
     
     
         13 . The vacuum cleaning device of  claim 1 , wherein the extension pipe assembly further comprises a handle for user's manipulation. 
     
     
         14 . The vacuum cleaning device of  claim 1 , wherein the body further comprises a fan motor that generates an inhalation force. 
     
     
         15 . A vacuum cleaning device comprising:
 a body having a fan motor that generates an inhalation force;   an extension pipe assembly having an inhalation nozzle that inhales air using the inhalation force of the fan motor; and   a hinge portion which rotatably couples the body and the extension pipe assembly to each other and through which a guide flow path on which air of the extension pipe assembly is guided toward the body, passes.   
     
     
         16 . The vacuum cleaning device of  claim 15 , wherein the hinge portion comprises a body hinge portion that protrudes from the body and an extension pipe hinge portion that protrudes from the extension pipe assembly so as to be adjacent to an axial direction of the body hinge portion. 
     
     
         17 . The vacuum cleaning device of  claim 16 , wherein the guide flow path comprises a connection hose that perforates one of the body hinge portion and the extension pipe hinge portion so as to guide air of the extension pipe assembly toward the body. 
     
     
         18 . The vacuum cleaning device of  claim 16 , wherein the guide flow path comprises a first channel formed in the body hinge portion and a second channel formed in the extension pipe hinge portion so as to communicate with the first channel using a shaft coupling portion of the body hinge portion and the extension pipe hinge portion. 
     
     
         19 . A vacuum cleaning device comprising:
 a body comprising a dust collecting unit that collects dust;   an extension pipe assembly having an inhalation nozzle that inhales air; and   a hinge portion which rotatably couples the body and the extension pipe assembly to each other,   wherein the body and the extension pipe assembly are configured to rotate about the hinge portion between a predetermined minimum angle and a predetermined maximum angle.