| 摘要 |
Disclosed is to a safety syringe. An adapter having a needle is threaded into a neck part of a cylinder, preventing fluctuation of the needle, so the needle can be precisely pricked. Grooves are defined in the adapter, and projections are formed on the plunger so that the projections can be smoothly engaged into the grooves. If the plunger is rotated, as the adapter is integrally rotated, the adapter is unthreaded from the cylinder. A rod having a hook is eccentrically formed on the plunger, and the adapter is formed with a hollow part and a hook engaging portion. Therefore, the rod can be inserted into the hollow part while being bent inward, and the hook can be engaged with the hook engaging portion. In this sate, as the plunger is pulled backward, the needle is withdrawn into the cylinder, and subsequently collapsed by pushing the plunger. |
