| 摘要 |
A retractable needle syringe is disclosed which includes an elastomeric anchor connected at the distal end of a syringe barrel with a needle connector releasably connected in the anchor and adapted to carry a needle cannula. A plunger with a piston is provided with a coupling member movable into coupling engagement with a coupling member on the needle connector to connect the needle connector with the plunger. A seal on the piston prevents fluid from flowing out of the cannula when coupling engagement between the piston rod and the needle connector is effected. The coupling member on the plunger moves a portion of the anchor away from the needle connector to reduce the force necessary to remove the needle connector from the anchor. The plunger is moveable proximally in the barrel to move the needle connector and a needle connected thereto into the barrel. The plunger rod has a weakened portion to permit manual breakage of the rod.
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