Syringe with a snapping device for backward pulling the needle into the syringe after syringing

A syringe with a snapping device for backward pulling the needle into the syringe after syringing, the syringe comprising:

• a hollow barrel having an inner periphery, an outer periphery, a front end and a flange extending from the inner periphery of the hollow barrel near the first end of the hollow barrel;
• a plunger partially and movably received in the hollow barrel, the plunger including a front end toward the first end of the hollow barrel and abutting the inner periphery of the hollow barrel, and a connector centrally extending from the front end of the plunger toward the first end of the hollow barrel;
• and
• a snapping device slidably received in the hollow barrel and selectively connected to the connector of the plunger, the snapping device including:
• a body slidably received in the hollow barrel and selectively engaged to the connector of the plunger;
• an annular protrusion extending from an outer periphery of the body;
• two locking member downward extending from the annular protrusion and diametrically corresponding to each other, each locking member having a first hook formed on a middle portion of the locking member and extending toward the inner periphery of the hollow barrel to engage to the hollow barrel, a hollow stub centrally and longitudinally extending from the body, an annular slit defined in the hollow stub, a second hook extending from the locking member opposite to the first hook and selectively engaged to the annular slit of the hollow stub and a pusher extending through the hollow barrel such that the first hook is detached from the hollow barrel when the pusher is inward compressed.