INJECTION NEEDLE SHANK POSITIONING STRUCTURE OF SAFE INJECTION NEEDLE CYLINDER

摘要

PROBLEM TO BE SOLVED: To provide an injection needle shank positioning structure of a safe injection needle cylinder in which the cost is reduced and accuracy of a position of an injection needle body is improved.;SOLUTION: A projecting ring 12 is formed on the upper end of the neck part 11 of an injection needle cylinder 1 and an elastic and flexible fastening part 13 inwardly crossed upward from the inner edge on the lower end of the neck part 11 is integrally formed, and an inward hook body 14 is formed on its tip end. A trumpet shape hole 22 is inwardly formed on the bottom part of the injection needle shank 2 equipped with an injection needle body 21. The end of the hole is formed in an expanding hole 23. A guide face 24 is outwardly formed on the bottom end of the injection needle shank 2 and a dent part 25 is formed outside correspondingly to the hook body 14.;COPYRIGHT: (C)2004,JPO