Needle-free injection connector without positive pressure and negative pressure

Abstract

The invention relates to a needle-free injection connector without positive pressure and negative pressure, comprising a joint, wherein a receiving chamber is formed above a pipe body and a liquid medium inlet is arranged at the bottom of the receiving chamber; an elastic valve arranged in the receiving chamber and having an inner space, wherein an upper seam and a lower seam formed at the top and bottom of the elastic valve are communicated with the inner space, which can be opened to form opening shapes; when the lower seam is opened, the lower seam is communicated with the liquid medium inlet; and a bidirectional conducting element is arranged in the inner space of the elastic valve and used for opening the upper seam and the lower seam when use and provided with a liquid medium runner joint. The elastic valve returns to the status quo to close the upper seam and the lower seam after use and isolates outside air and prevents upstream of the liquid medium.

Description

technical field [0001] The invention relates to an injection connector, in particular to a needle-free injection connector without positive and negative pressure, which has a good airtight effect and can avoid air residue and medicament backflow. Background technique [0002] Traditional syringes and syringes are common medicament administration instruments. However, syringes and syringes are dangerous and need to be recycled, resulting in higher medical costs. [0003] Therefore, someone has developed a needle-free injection connector and a needle-free syringe for administering medicaments. This kind of device has low risk, can be reused, and can avoid the high cost caused by a large number of recycling. [0004] However, there are a lot of gaps inside the existing needle-free injection connectors, and the sealing effect is not good, resulting in considerable air or medicine remaining in it, and the medicine and blood flow back inappropriately and remain in other parts. Wh...

AI Technical Summary

Problems solved by technology

[0004] However, there are a lot of gaps inside the existing needle-free injection connectors, and the sealing effect is not good, resulting in considerable air or medicine remaining in it, and the medicine and blood flow back inappropriately and remain in other parts. When injecting medicine, air or residual medicine will be injected into the patient's body in a positive pressure manner, causing improper expansion of blood vessels and causing pain to the patient. Reverse flow back into the injection connector, such a reciprocating operation, causes the patient to bear the pain caused by the positive pressure expansion of the blood vessel when the drug is administered, and at the same time, the blood or body fluid backflow back into the patient's body will also cause repeated infection

[0005] In addition, the existing needle-free injection connector is mainly equipped with a piercing guide tube inside the elastic sleeve, and the upper and lower ends of the guide tube can extend out from the upper and lower ends of the elastic sleeve for injection. The through tube is assembled with each other through the upper and lower parts, so it is easy to leave a gap and the medicine and blood will remain in it

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