Subcutaneous infusion needle stick prevention device using needle hub retraction

A needle stick prevention device for a medical device the needle stick prevention device comprising:

• a needle shield for selectively covering a distal end of a needle, the needle shield including an outer wall with a passageway communicating with a proximal end and a distal end, wherein the distal end of the needle shield includes a transverse receptacle communicating with a distal opening extending through the distal end of the needle shield;
• a needle hub movably received within the passageway of the needle shield, the needle hub including:
• a proximal end;
• a distal end;
• a needle fixedly connected to the distal end of the needle hub;
• and
• a transverse opening disposed proximal to the distal end of the needle hub;
• an actuation plug movably received in the transverse opening of the needle hub and the transverse receptacle of the needle shield to engage the needle shield, and engage the needle hub and the medical device within the needle shield;
• and
• a spring disposed between the needle hub and the actuation plug;
• wherein the actuation plug further comprises first and second arcuate members disposed on respective inner surfaces of first and second arms, each of the first and second arcuate members having a cantilevered arm with a projection disposed at a free end thereof, wherein the cantilevered arms are slidably disposed in the transverse opening of the needle hub;
• wherein the needle shield comprises a distal plate at the distal end of the needle shield, the distal plate being connected with a remainder of the needle shield by a mating portion and a wall, and the cantilevered arms are slidably disposed on opposing lateral sides of the mating portion.