Patent ID: 7431343
Filing Date: 2008-10-07
Classification: F16L,H02G

Abstract:
1. A joint structure for connecting a corrugated pipe to a fixed part, the corrugated pipe having a plurality of bulgy portions and a plurality of concave portions formed at an outer surface thereof, comprising: a main body comprising a first screw thread and a second screw thread respectively formed at two ends thereof, the first screw thread of the main body being configured for locking a packing screw cap, the second screw thread being configured to be locked to the fixed part via a screw cap set thereon; a clamping claw that is an annular ring, two ends thereof respectively contacting against an end of the main body and an inner end of the packing screw cap, the clamping claw defining a cut through slot to make the clamping claw have a margin for enlarging an inside diameter thereof, the cut through slot extending along an axis direction of the clamping claw, a plurality of elastic inner claws being formed at an edge of the clamping claw, a locking part protruding towards the center of the clamping claw being formed at an end of each of the inner claws, an end of the locking part corresponding to the packing screw cap forming an oblique guiding surface, another end of the locking part corresponding to the main body forming an erect stopping surface such that as the corrugated pipe inserts into the clamping claw, the bulgy portions push on the oblique guiding surfaces to make the inner claws move outwardly until the locking parts are engaged in one of the concave portions, and as the corrugated pipe is dropped out from the clamping claw, the bulgy portions push on the erect stopping surfaces but are stopped thereby so that the corrugated pipe is not drawn out unless completely releasing the packing screw cap from being engaged with the main body; and a waterproof tightening ring provided within the first screw thread and contacting against the clamping claw, wherein the waterproof tightening ring is made from a flexible waterproof material, and an annular flange is formed at an inner surface of the waterproof tightening ring to be engaged in another one of the concave portions.