| 摘要 |
<p>To eliminate needle-stick risk by encapsulating the needle of a syringe immediately after discharge of syringe contents (43), the entire syringe, such as a pre-filled miniature glass syringe (40), is housed in a device comprising a hollow body (10), a spring (20) and a plunger (30). The barrel (41) of the syringe (40) is held in the body interior against the force of the spring (20) by latching formations (IS) internal to the body (10). The plunger (30) itself is hollow so as to provide a chamber (36) to receive the syringe piston means (45, 46) and at least part of the barrel (41) upon retraction of the syringe. The plunger (30) has deflectable engagement elements (33) at its forward end so that as it is pushed in to the body (10), it reliably displaces the syringe piston/rod (45, 46) to discharge the syringe contents (43) via a hollow needle (42), the elements (33) ultimately being deflected outwards as the contents are fully discharged so as not to impede syringe retraction into the hollow plunger (30). The plunger (30) also has latch opening projections (34) at its forward end which, as the plunger (30) is pushed home, serve to disengage, e.g. by deflection, the latch formations (18). The syringe barrel (41), together with the needle (42) and piston means (45, 46) are then immediately retracted into the device by force of the spring (20).</p> |
