Disposable injector

Abstract

The disposable injector includes one cylinder, one needle assembly, one medicine tube inside the cylinder and one pushing unit for pushing medicine liquid and the medicine tube. The needle assembly possesses one locating unit inside the cylinder, one ring seat between the locating unit and the outlet of the cylinder, one needle penetrating the ring seat and extending beyond the cylinder, and one elastic element between the ring seat and the outlet of the cylinder. The pushing unit can push medicine liquid for injection. After finishing injection, the medicine tube is pushed for the locating unit to move toward the outlet of the cylinder so as to release the location to the ring seat, and the elastic element is started to push the ring seat, so that the needle and the medicine tube are hidden inside the cylinder and the pushing unit is withdrawn simultaneously. The present invention has capacity of simplifying injection operation and raised injection safety.

Description

technical field [0001] The invention relates to a syringe, in particular to a disposable syringe which contains medicinal liquid in advance, can simplify the operation procedure of injecting medicine in clinical medicine, and can improve the safety and efficacy of injection operation. Background technique [0002] Please refer to Fig. 1 and Fig. 2. Fig. 1 is a cross-sectional view illustrating US Pat. Taking the U.S. Patent No. US6229055 case as an example, the syringe 9 mainly includes a syringe 91, a positioning member 92, a needle seat 93, a needle body 94, an elastic element 95, a cartridge 96, a push rod 97, An elastic body 98 and a ring 99 . The syringe 91 has an inlet port 911 and an outlet port 912 opposite to each other. The positioning member 92 is detachably fastened in the syringe 91 and adjacent to the outlet end 912 . The needle seat 93 is limited between the inlet end 912 of the syringe 91 and the positioning member 92 . The needle body 94 is fixed with th...

AI Technical Summary

Problems solved by technology

[0005] 1. Generally speaking, the main purpose of using a syringe containing liquid medicine is to simplify the process of pre-extracting the liquid medicine in the medicine tank with the injection syringe in clinical operations, and then injecting it. In addition to simplifying the medical operation procedures, It is also possible to avoid situations such as contamination or needle sticking in the process of preparing medicine such as extracting medicinal liquid with a syringe, but the cartridge 96 of the syringe 9 cannot be directly accommodated in the syringe 91, otherwise the needle will body 94 pierces the situation of the cartridge 96 closure 963, therefore, the cartridge 96 must be packaged separately from the syringe 9, and when used, the cartridge 96 is combined with the push rod 97 before being assembled into the cartridge 96. In the syringe 91, obviously, the syringe 9 just changes the action of extracting the medicinal liquid into the action of assembling it into the cartridge 96, and does not really achieve the simplification of the operation procedure of clinical medical injection drug treatment

[0006] 2. Since the needle body 94 and the needle seat 93 are retracted and hidden in the inner pipe section 971 of the push rod 97 after use, the positioning member 92 and the needle seat must be released synchronously before the elastic element 95 is activated. 93, the sealing member 963 and the cartridge 92, and the elastic body 98, the collar 99 and the cartridge 96, not only have more key components but also have a more complicated structure, thereby forming a problem in manufacturing and use. on the trouble

[0007] This shows that above-mentioned existing injector obviously still has inconvenience and defect in structure and use, and demands urgently further improving

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

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