| 摘要 |
FIELD: medical equipment. ^ SUBSTANCE: protection device is attached to syringe to transform it to single-use automatic safety syringe. Syringe has case, plunger and injection needle. Case is hollow from inside and open from back and front. Plunger slides inside case from back position when syringe is completely filled to front position when it is empty. Plunger is provided with piston, which piston can be driven into motion manually and withdrawn out of case of syringe by means of its rear end. Needle is built in needle carrier attached to head of syringe's case. Protection device can be preliminary assembled and it has hollow cylinder, spring and support member. Cylinder is mounted for slide onto case of syringe. Spring is placed into cylinder. Support member for spring is also placed into cylinder and integrated with front part pf syringe's case. Fixation devices are absent in cylinder, which devices work together with support member used for fixing cylinder when it is in its front safe position. Fixation device for fixating cylinder in safe position have pair of front tongues formed in cylinder. Pair of front tongues has rear support surfaces being capable of resting against shoulder of support member. Pair of rear tongues has front support surfaces for resting against rear edge of case of support member. ^ EFFECT: universality; simple at manufacture and mounting. ^ 16 cl, 8 dwg |
