Patent ID: 8021354
Filing Date: 2011-09-20
Classification: A61M,B29C,B29K,B29L

Abstract:
1. A needleless injection structure comprising: a duct having a through channel extending a top through a bottom thereof, and a ring channel and a transverse channel both indented on the top thereof, wherein the transverse channel communicates the ring channel with the through channel; a stuff base disposed on the top of the duct, the stuff base having an uneven portion, a first fillet, and a plurality of first protrusions; wherein the uneven portion is arranged on a top of the stuff, the first protrusions are annularly disposed around an external wall of the stuff; the stuff base further includes a closed space formed therein and a buffering area arranged over the closed space; and a casing assembled on the duct; the casing having an opening, a second fillet, an accommodating space and a plurality of second protrusions; wherein the opening communicates with the accommodating space; the second fillet corresponding to the first fillet and being with a second guide angle less than one of first fillet; the stuff base is disposed in the accommodating space; the second protrusions retain against the external wall of the duct, while the first protrusions retain against the internal wall of the casing.