Retractable upright pole for a camping tent

Abstract

A retractable upright pole for a tent has multiple tubes receivable in one another and each tube having a ball-spring combination and multiple bores defined to correspond to the ball-spring combination of another tube to secure the connection between two adjacent tubes. The upright pole further has a chain-spring combination inside the tube to be in combination with the ball-spring combination to secure the connection between two adjacent tubes.

What is claimed is:  
     
         1 . A retractable upright pole for a tent, the upright pole comprising: 
 multiple tubes of different sizes and sequentially receivable in one another and each tube having a neck in one end, an open end in the other end, multiple bores defined in a periphery of the tube and a ball-spring combination securely provided inside the tube, the ball-spring combination being able to extend to a corresponding one of the bores of another tube to secure the connection between the neck and the open end of two adjacent tubes of different sizes.    
     
     
         2 . The upright tube as claimed in  claim 1  further having a chain-spring combination provided in at least one of the tubes to secure the connection between two adjacent tubes.  
     
     
         3 . A retractable upright pole for a tent, the upright pole comprising: 
 multiple tubes of different sizes and each tube having a neck in one end, an open end in the other end, multiple bores defined in a periphery of the tube and a chain-spring combination securely provided inside the tube, the chain-spring combination being able to secure the connection between the neck and the open end of two adjacent tubes of different sizes.    
     
     
         4 . The upright tube as claimed in  claim 3  further comprising a ball-spring combination provided in at least one of the tubes to secure the connection between two adjacent tubes.