The utility model can avoid the safety injector of reuse,It includes there is a syringe,And one can stretch the piston rod set in the what syringe； Wherein,The outer wall of the stack shell of the syringe crushes block up to being convexly equipped with one less,The thickness of block contact position is crushed on the stack shell and with non-this of the small what of the thickness for crushing block contact position simultaneously； ThereforeBlock is crushed through this and oppresses the design of the stack shell thinner thickness of block periphery,Except can reach design structure it is simplified,It reduces outside production cost,And this, which can be easily pressed, using Hou crushes block,The stack shell can be made to crush the rupture of block peripheral region by this,Promote the safety injector that there is preferable safety and prevent from being used by recycling again.本新型可避免重複使用之安全注射器，其包含有一針筒，以及一可伸置於該針筒內之活塞桿；其中，該針筒之筒身之外壁上至少凸設有一壓破塊，同時該筒身上且與該壓破塊接觸處之厚度小於非該壓破塊接觸處之厚度；是以，透過該壓破塊與壓迫塊周緣之筒身厚度較薄之設計，除能達到設計結構簡化、降低生產成本外，並且使用後可輕易的按壓該壓破塊，即可使該筒身由該壓破塊周緣處破裂，促使該安全注射器具有較佳安全性與防止被再次回收使用。
