Quantitative self-destruction syringe

Abstract

The invention relates to a quantitative self-destruction syringe, and belongs to the field of sterile medical instruments. The quantitative self-destruction syringe comprises an outer sleeve, a core rod and a piston, and a pull-back ring and a check ring are sequentially arranged on the core rod; a quantitative self-destruction clamping seat is arranged at the opening end of the outer sleeve, an elastic sleeve piece is arranged in the quantitative self-destruction clamping seat, a quantitative boss is arranged on the inner wall of the quantitative self-destruction clamping seat in an outward protruding mode, and the elastic sleeve piece is arranged outside the core rod in a sleeving mode; the elastic sleeve comprises a sleeve body, an elastic buckle arranged around the central axis is arranged at the front end of the sleeve body, a hollow positioning boss is arranged at the rear end of the sleeve body, a quantitative clamping groove is inwards formed in the outer surface of the positioning boss, and the quantitative clamping groove and the quantitative boss are arranged in a matched mode; a pull-back ring is arranged at the front end of the core rod, and a check ring is arranged in the middle of the core rod. According to the self-destruction syringe, liquid can be quantitatively sucked, self-destruction is completed after injection, the self-destruction state is stable, safe and reliable, bubbles are not increased in the suction process, secondary exhaust is not needed, the workload of medical staff is reduced, infection is reduced, and use is safer.

Description

technical field [0001] The invention relates to a quantitative self-destruct syringe, which belongs to the field of aseptic medical instruments. Background technique [0002] At present, ordinary syringes are widely used in China. When ordinary syringes suck liquid medicine, they usually use the operation mode of marking the scale, and the medical staff visually confirm the suction volume. At present, the common quantitative self-destructing syringe has a complex structure. Many manufacturers have specially designed the head of the plunger and the needle seat. After the plunger is pushed to the bottom, the needle seat is stuck to realize self-destruction. [0003] There are following technical defects in the prior art: [0004] 1. The dose of the pumped liquid medicine is uncertain, and there are hidden dangers in drug safety. During the use of ordinary syringes, it is easy to draw more than the predetermined dose of liquid medicine. On the one hand, it will cause waste, a...

AI Technical Summary

Problems solved by technology

[0004] 1. The dosage of the pumped liquid medicine is uncertain, and there are hidden dangers in drug safety

During the use of ordinary syringes, it is easy to draw more than the predetermined dose of liquid medicine. On the one hand, it will cause waste, and on the other hand, excessive administration will also cause harm to patients.

[0005] 2. At present, the common self-destructing syringes are complex in structure and have certain limitations in reliability. For example, the utility patent with the notification number CN2770678Y discloses an anchor piston needle retractable safety syringe, which has a needle seat, a needle, and a pusher. The rod, the jacket, the needle head is arranged on the top of the needle seat, the needle head is fixedly connected with the needle seat, the push rod is arranged in the jacket, the front end of the push rod is provided with a groove, the head of the jacket is provided with a barrel neck, and the needle seat is arranged in the barrel neck, The outer ring of the needle seat is provided with a convex annular sealing ring, the needle seat and the cylinder neck are tightly connected through the convex annular sealing ring, and the lower part of the needle seat is provided with an anchor head

[0006] 3. There are too many bubbles during the suction process, which requires secondary exhaust, which not only increases the workload of medical staff, increases the work intensity of medical staff, but also reduces work efficiency and increases the probability of infection

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