Device for separating the connecting end of a hypodermic needle from the tip of an injection instrument

摘要

The connecting end (2a) of the hypodermic needle is so designed that it can be attached to and then disconnected from the tip (3) of an injection instrument (4) by pressure, that is, an axial tractive force exerted between the said needle (2) and the said injection instrument (4). The extraction device has an opening (17) delimited by locking elements (13) forming one piece with elastic pieces (10b, 12) so as to allow its diameter to vary between a minimum diameter and a maximum diameter at least equal to the diameter of the said connecting end (2a) and at least one piece (13a) associated with the said locking elements (13) for the purpose of converting an axial force exerted on the said piece (13a) into at least one radial component capable of being applied to the said elastic pieces (10b, 12) so as to deform them radial in order to increase the diameter of the said opening (17) when axial pressure is exerted by the said connecting end (2a).