safety syringe

Abstract

The invention discloses a safe syringe. The safe syringe comprises a needle cylinder, a piston and a needle, wherein an injection end communicated with the interior of the needle cylinder is arranged at the upper end of the needle cylinder, the piston is sleeved with the needle cylinder, the needle is fixedly arranged on the injection end through a needle base, the center axis of the injection end is not coaxial with the center axis of the needle cylinder, and a limiting groove is formed in the inner side wall of the injection end. After drug injection is finished with the safe syringe, the needle can be bent in the needle cylinder, so that secondary recovery is avoided and staff infection caused by stabbing or scratching of the needle is avoided during syringe collection.

Description

technical field [0001] The invention relates to an injector, in particular to an injector capable of realizing the retraction of an injection needle. Background technique [0002] In the medical field, syringes are widely used in the injection of liquid medicine and the extraction of blood from patients with some diseases. After the syringe is used, a safety shield is generally placed on the needle of the syringe, and then the syringe is recovered. During the working process of the syringe, once the operation is improper, the staff is easy to be stabbed, and then increases At the same time, when a large number of discarded syringes are stored together, the protective cover of the needle is easy to scratch off. When the staff cleans up the recycled syringes, some exposed needles will affect the recycling work. Injuries to personnel will also increase the possibility of some diseases and infections. For this reason, many medical equipment manufacturers are working on developi...

AI Technical Summary

Problems solved by technology

[0004] 1. Since the puncture cone cannot pierce the film area, the upper end surface of the rubber piston cannot be fitted with the inner bottom end surface of the syringe, which results in more air remaining in the syringe. After the drug is drawn , requiring multiple exhaust procedures

[0005] 2. The puncture cone is a solid body, and its own elastic compression is small. In the process of pulling back the needle, if you accidentally use too much force, it is very likely that the puncture cone will be detached from the elastic chuck, and the return of the needle cannot be achieved. shrink

[0006] 3. After the puncture cone has been inserted into the elastic collet, one end surface of the elastic collet cooperates with the end surface with an inclined angle of the puncture cone, so that the elastic collet has a lateral pressure on the needle seat through the puncture cone , resulting in difficulty in pulling back the needle seat. At the same time, the elastic collet will also exert a lateral pressure on the piercing cone, which will easily cause the piercing cone to deform, and then make the needle seat be pulled back into the syringe. When the needle seat does not tilt, which reduces the reliability of the syringe

[0007] 4. When the puncture cone is inserted into the elastic clip hole, it needs to be pushed hard. The puncture cone quickly snaps into the elastic clip hole during this process. Due to the high speed, the medicine cannot be slowly and steadily pushed into the patient's body, which will cause the patient pain and discomfort

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