Connection structure of tent poles

Abstract

In the connection structure of tent poles, both ends of a connecting rod are inserted into opposing ends of a pair of tent poles to connect the tent poles and the connecting rod has an outer diameter corresponding to inner diameters of the tent poles. A widened tubular part is formed on at least one of ends of the tent poles and has a diameter larger than that of the end on which the widened tubular part is formed. An end of the connecting rod has an outer diameter corresponding to an inner diameter of the widened tubular part and is inserted and fixed into the widened tubular part. A magnitude of the moment of inertia of the connecting rod is 60% or more of the moment of inertia of the widened tubular part of the tent pole.

1 . A connection structure for connecting a pair of tent poles comprising: 
 a connecting rod having an outer diameter corresponding to inner diameter of the tent poles, both ends of the connecting rod being inserted into opposing ends of the tent poles to connect the tent poles; and    a widened tubular part formed on at least one end of the tent poles and having a diameter larger than that of the end on which the widened tubular part is formed,    wherein one end of the connecting rod has an outer diameter corresponding to an inner diameter of the widened tubular part and is inserted and fixed into the widened tubular part, and a magnitude of the moment of inertia of the connecting rod is 60% or more of the moment of inertia of the widened tubular part of the tent pole.    
   
   
       2 . The connection structure as claimed in  claim 1 , wherein the magnitude of the moment of inertia of the connecting rod is 60-80% of the moment of inertia of the widened tubular part of the tent pole.  
   
   
       3 . The connection structure as claimed in  claim 1 , wherein a diameter increment of the widened tubular part is 10% or less for the diameter of the tent pole to which the widened tubular part is formed.  
   
   
       4 . The connection structure as claimed in  claim 1 , wherein the tent poles have same diameters, and the widened tubular part is respectively formed on opposing ends of the tent poles.  
   
   
       5 . The connection structure as claimed in  claim 1 , wherein the tent poles have different diameters, and the widened tubular part has a diameter equal to that of the tent pole having a larger diameter and is formed on an end of the tent pole having a smaller diameter.  
   
   
       6 . The connection structure as claimed in  claim 1 , wherein the tent poles have different diameters, an end of the tent pole having a larger diameter is formed with a reduced tubular part having a diameter smaller than that of the tent pole having the larger diameter, and the widened tubular part having a diameter equal to the reduced tubular part is formed on an end of the tent pole having a smaller diameter.