| 摘要 |
FIELD: medicine.SUBSTANCE: self-destroying insulin syringe includes a barrel, a push rod, a rubber piston and a needle saddle. The push rod has a front end connected to a tapered boss by a latching core. The needle saddle is detachably connected to the front end of the barrel and comprises a needle bushing for the needle insertion. Between the needle bushing and the needle saddle, there is a water-permeable flexible round O-ring. The needle bushing extends downwards to form a retaining ring and has an annular projection in the retaining ring. The annular ring comprises a needle hole. The barrel comprises a saddle for the needle attachment interacting with the needle bushing. The saddle for the needle attachment is provided with a hole for an injection solution; it rests against and is fixed to a front end of the barrel by means of a support saddle. An upper end of the saddle for the needle attachment comprises a lock ring which penetrates into the retaining ring hole and is latched with the retaining ring. An inner wall of the retaining ring conically seats on an outer wall of the lock ring. When the lock ring connects to the retaining ring, the lock ring hole squeezes the annular projection inside.EFFECT: invention enables changing the needles with various characteristics for medical indications and drawing the needles into the barrel upon completion of the injection.2 cl, 15 dwg |
