| 摘要 |
A syringe or like device which can be used for the conveyance of parenteral fluids which are to be introduced into or drawn from the body through the skin comprising a tubular body (11) having a forward end (26) and a rearward end (34) where the forward end is capable of receiving a hollow needle (20) to enable the needle to be able to project from the body, the needle (20) slidable relative to the body (11), the body (11) also including a chamber (14) capable of receiving a parenteral fluid and capable of being reduced in volume to expel the fluid contained therein, the needle (20) is capable of being manually retracted into the body (11) by a retracting means (28) such that the chamber reduces in volume to expel the fluid contained therein and such that the needle (20) is retracted to be wholly contained within the body (11). The needle is able to be supported at one end from the body by a plug (16) which is slidably and sealingly received in the body (11). The chamber (14) is located rearward of the plug (16) and the plug is adapted to enable the needle to communicate with the chamber (14) through the plug, a stop (18) provided in the body rearward of the plug (16) to define the rearward end of the chamber (14). The stop (18) being slidably and sealingly received in the body (11) whereby a greater degree of forces required to move the stop (18) than to move the plug (16). The rearward end (34) of the body slidably supporting a slider (38) for axial movement, an external protrusion (40) on the slider (38) for manipulation of the slider to effect axial movement. The retracting means (28) comprising a flexible member secured at one end to the plug (16) and secured at the other end to the slider (38) slidably and sealingly received through the stop (18).
|
