Patent ID: 8142214

Claim:
A joint structure, comprising: a body provided internally with a hollow core, provided externally with threads, and connected to a cable terminal and an installation end; a sleeve disposed in the body, wherein a positioning ring is disposed at an end of the sleeve; a resilient element disposed in the sleeve and provided with longitudinal slashes, wherein a positioning ring and a bump are disposed at two ends of the resilient element, respectively; and a metallic pipe being slash-free and hollow and having an end with an aperture for admitting the resilient element and the other end having an aperture for admitting a rod; wherein the rod has a positioning ring disposed at an appropriate portion of the rod, the rod having an end insertable into the metallic pipe, and having another end for penetrating two washers and a packing, the washers and packing, being positioned at the positioning ring; and the packing being sandwiched between the two washers; wherein the two washers and the packing are disposed around the rod and engaged with the body circumferentially and tightly; wherein the aforesaid elements together form the joint structure, such that the resilient element having the positioning ring facilitates assembling and positioning and efficiently reduces return loss and insertion loss of signals, and the bumps reduce metal fatigue of the resilient element.