| 摘要 |
A retractable and destructible safety syringe including a syringe barrel 21, a plunger 36, a needle holder 32, a needle 24, clicks 25 formed on the needle holder or the plunger and a one-way movable detent 26 formed on the plunger or the needle holder. When a piston of the plunger is pushed to the bottom, the detent engages with the clicks, whereby the needle holder and the needle are pulled back into the barrel. In addition, the tip of the needle is pressed against a shoulder section of the barrel and bent. Sealing fixing rings are formed on the outer wall of the needle holder and inner wall of the needle holder cavity. An ensurance latch plate may be disposed between the barrel and the plunger to prevent the plunger from being pushed to latch the clicks with the detent by mistake. |
