Bendable extension pipe having joint for vacuum cleaner

Abstract

A bendable extension pipe for a vacuum cleaner with a body bent by a button manipulation that forms a sealed fluid passage between a vacuum cleaner body and a suction brush, is disclosed. The bendable extension pipe includes a first extension pipe and a second extension pipe. The first and second extension pipes are rotatably connected. A locking button is elastically disposed on the first extension pipe to restrict rotation of the first and the second extension pipes. A sealing cover prevents the locking button from moving out of joint of the first and second extension pipes and seals the first and the second extension pipes.

1 . A bendable extension pipe for a vacuum cleaner with a body bent by a button manipulation, the bendable extension pipe forming a sealed fluid passage between a vacuum cleaner body and a suction brush, comprising: 
 a first extension pipe;    a second extension pipe rotatably connected with the first extension pipe;    a locking button elastically disposed on the first extension pipe to restrict rotation of the first and the second extension pipes; and    a sealing cover for preventing the locking button from moving out of joint of the first and second extension pipes and sealing the first and the second extension pipes.    
   
   
       2 . The bendable extension pipe of  claim 1 , wherein the locking button is formed on a seating protrusion which is protruded from a side of an axis of a rotation of a joint which movably connects the first extension pipe and the second extension pipe.  
   
   
       3 . The bendable extension pipe of  claim 2 , wherein the locking button comprises: 
 at least one interfering rib protruding along an outer circumference; and    a restriction projection for restricting the rotation of the first and the second extension pipes.    
   
   
       4 . The bendable extension pipe of  claim 2 , wherein the seating protrusion comprises at least one guide projection formed on the outer circumference, and a sliding groove formed in the locking button to correspond to the guide projection such that, in accordance with a push and release of the locking button, the sliding groove is guided by the guiding projection to prevent rotation of the locking button.  
   
   
       5 . The bendable extension pipe of  claim 4 , wherein an elastic member is disposed between the locking button and the seating protrusion such that, in accordance with the push of the locking button, the elastic member exerts a recovery force in a direction of releasing from the locking button.  
   
   
       6 . The bendable extension pipe of  claim 3 , wherein the second extension pipe comprises: 
 a slot plate comprising a sliding slot for a sliding engagement with the seating projection, the sliding slot having one open end; and    a locking part formed in a position corresponding to the restriction projection, to selectively lock the restriction projection in accordance with a displacement of the restriction projection in an axial direction.    
   
   
       7 . The bendable extension pipe of  claim 6 , wherein the locking part is separated from the slot plate by a distance equal to, or greater than a thickness of the restriction projection.  
   
   
       8 . The bendable extension pipe of  claim 1 , wherein the sealing cover comprises a first cover with a button hole corresponding in size with an outer circumference of the locking button, and a second cover engaged with the first cover and sealing connecting parts between the first and the second extension pipes.  
   
   
       9 . A bendable extension pipe for a vacuum cleaner with a body bent by a button manipulation, the bendable extension pipe forming a sealed fluid passage between a vacuum cleaner body and a suction brush, and comprising: 
 a first extension pipe comprising a seating protrusion formed on the center of a cylinder joint, with a locking button which is pushed and released by an elastic member, the cylinder joint having one open end;    a second extension pipe including a slot plate for a sliding engagement with the seating protrusion, and a locking part for selectively locking the locking button; and    a sealing cover for sealing connecting parts between the first and the second extension pipes, and including a button hole through which the locking button is exposed to the outside.    
   
   
       10 . The bendable extension pipe of  claim 9 , wherein the locking button comprises: 
 at least one interfering rib protruding along the outer circumference; and    a restriction projection for restricting rotation of the first and the second extension pipes.    
   
   
       11 . The bendable extension pipe of  claim 9 , wherein the seating protrusion comprises at least one guide projection formed on the outer circumference, and a sliding groove formed in the locking button to correspond to the guide projection such that, in accordance with a push and release of the locking button, the sliding groove is guided by the guiding projection to prevent rotation of the locking button.  
   
   
       12 . The bendable extension pipe of  claim 9 , wherein the second extension pipe comprises: 
 a slot plate comprising a sliding slot for a fitting-engagement with the seating protrusion; and    a locking part formed in the position corresponding to the restriction projection, to selectively lock the restriction projection in accordance with a displacement of the restriction projection in an axial direction.    
   
   
       13 . The bendable extension pipe of  claim 12 , wherein the locking part is separated from the slot plate by a distance equal to, or greater than the thickness of the restriction projection.  
   
   
       14 . The bendable extension pipe of  claim 9 , wherein the sealing cover comprises a first cover including the button hole, and a second cover engaged with the connecting parts of the first cover to seal the first and the second extension pipes, respectively.