Tube shaft for a vacuum cleaner

Abstract

A tube shaft for a vacuum cleaner comprising upper and lower tube-shaped parts ( 11, 14 ) which by way of a link means ( 16 ) are pivotally connected to one another. The link means ( 16 ) is provided with a locking mechanism for locking the two tube-shaped parts in one or several angular positions with respect to one another. The tube shaft comprises an operating means ( 21 ) arranged at a distance from and above said link means ( 16 ). The operating means ( 21 ) is connectable to the locking mechanism for activating or deactivating the locking means.

1 . A tube shaft for a vacuum cleaner comprising an upper tube-shaped part ( 11 ); a lower tube-shaped part ( 14 ); a link means ( 16 ) pivotally connecting the lower tube-shaped part ( 14 ) to the upper tube-shaped part ( 11 ), the link means ( 16 ) being provided with a locking mechanism ( 32 ,  37 ) for locking the two tube-shaped parts in one or several angular positions with respect to one another, characterized in that there is an operating means ( 21 ) arranged at a distance from and above said link means ( 16 ), the operating means ( 21 ) being connected to the locking mechanism ( 32 ,  37 ) for activating or deactivating the locking means.  
     
     
         2 . The tube shaft according to  claim 1  characterized in that the operating means is connected to the locking mechanism ( 32 ,  37 ) by one of a wire, a draw bar and a push rod ( 20 ).  
     
     
         3 . The tube shaft according to  claim 1  or  2 , characterized in that the operating means ( 21 ) comprises a sleeve surrounding the upper tube-shaped part ( 11 ).  
     
     
         4 . The tube shaft according to  claim 1 , characterized in that the locking mechanism comprises a spring loaded latch means ( 32 ) for engaging a recesses ( 38 ) on a cam surface, the latch following a pivoting motion of one of the upper tube-shaped part and the lower tube-shaped part, and the cam surface following a pivoting motion of the other one of the upper tube-shaped part and the lower tube-shaped part.  
     
     
         5 . The tube shaft according to  claim 2 , characterized in that said one of the wire, the draw bar and the push rod is arranged in a groove ( 22 ) on the outside of the upper tube-shaped part ( 11 ).  
     
     
         6 . The tube shaft according to  claim 1 , characterized in that at least one of the upper tube-shaped part ( 11 ) and the lower tube-shaped part ( 14 ) is movable telescopically through the link means ( 16 ) when the upper tube-shaped part ( 11 ) is aligned with the lower tube-shaped part ( 14 ).  
     
     
         7 . The tube shaft according to  claim 1 , characterized in that the link means ( 16 ) comprises a first link member ( 23 ) and a second link member ( 24 ), the first link member ( 23 ) having a first tube-shaped connecting part ( 26 ) for the lower tube-shaped connecting part ( 14 ) and the second link member ( 24 ) having a second tube-shaped connecting part ( 29 ) for the upper tube-shaped part ( 11 ), the first link member ( 23 ) being pivotally connected to the second link member ( 24 ) at an axis ( 25 ) located outside the periphery of the upper tube-shaped part and the lower tube-shaped part.  
     
     
         8 . The tube shaft according to  claim 7 , characterized in that the first link member ( 23 ) and the second link member ( 24 ) are provided with a sealing surface ( 28 ) during a pivoting motion.  
     
     
         9 . The tube shaft according to  claim 1 , characterized in that the operating means ( 21 ) is located at an upper portion of the upper tube-shaped part ( 11 ).  
     
     
         10 . The tube shaft according to  claim 6 , characterized in that the operating means ( 21 ) is in a connectable position when the tube-shaped parts ( 11 ,  14 ) are in said angular positions.