Miniature needle table and injection needle assembly

Abstract

The invention provides a miniature needle table and an injection needle assembly. According to the invention, a plurality of needle tube clamping grooves are arranged on the side wall of the miniatureneedle table at intervals, and are parallel to one another; and the groove diameter of each needle tube clamping groove is matched with the outer diameter of a needle tube of a miniature injection needle. The injection needle assembly comprises a needle tube seat, a plurality of miniature injection needles and the miniature needle table, wherein the needle tube seat is provided with a liquid medicine cavity and a mounting cavity matched with the miniature needle table; the miniature injection needles are mounted on the needle tube clamping grooves of the miniature needle table; and the miniature needle table is mounted in the mounting cavity. According to the invention, the miniature injection needles are installed into the needle tube clamping grooves in advance in the mode that the miniature needle table with the side wall provided with the needle tube clamping grooves is additionally arranged, and the plurality of miniature injection needles can be fixedly installed on the miniature needle table in advance under the action of the pre-tightening force of the needle tube clamping grooves, so the purpose that the orientation of the openings of the installed miniature injection needles can still be kept consistent is achieved.

Description

technical field [0001] The invention relates to the field of injection needles, in particular to a micro-needle platform and an injection needle assembly. Background technique [0002] Intradermal or subcutaneous injection is an injection operation that injects the drug below the epidermis of the skin and above the subcutaneous tissue layer. The needle does not penetrate the subcutaneous fat and muscle tissue, such as hyaluronic acid compound solution injection, amino acid injection, saline injection, BCG vaccine injections and skin test injections of penicillin and cephalosporins, for which microneedles are usually used. [0003] Due to the high density of the skin itself and the relatively thin skin itself, when performing intradermal or subcutaneous injections, especially when intradermal injections, the injection site is relatively shallow, so that the injection site is relatively shallow when using a single micro-injection needle. The resistance is relatively high. Alt...

AI Technical Summary

Problems solved by technology

[0003] Due to the high density of the skin itself and the relatively thin skin itself, when performing intradermal or subcutaneous injections, especially when intradermal injections, the injection site is relatively shallow, so that the injection site is relatively shallow when using a single micro-injection needle. The resistance is relatively high. Although it is possible to reduce the injection resistance by installing multiple micro-injection needles on one syringe, this type of syringe with multiple micro-injection needles still cannot be widely used in the existing market. Application, the reason is mainly due to the insufficient installation accuracy of micro-injection needles

[0004] At present, the installation method of installing multiple injection needles on a syringe is mainly: firstly, the manipulator directly clamps multiple injection needles, then inserts the multiple injection needles into the needle tube seat connected to the syringe, and then inserts the multiple injection needles into the needle tube seat. Inject sealing glue into the gap between the injection needle and the injection needle to bond the injection needle and the needle tube seat together. It takes time for the sealing glue to coagulate, and the mechanical equipment itself will generate slight vibration, and the micro-injection needle itself has a small diameter (diameter They are basically below 0.5mm) and have a tubular structure. Therefore, during the coagulation process of the sealant, the needle tip opening (that is, the bevel end of the needle tip) of the injection needle at the beginning is facing the same injection needle. Deflection or self-rotation, so that after the sealant glue solidifies, the opening of the injection needle is facing inconsistently. Because the skin itself is relatively thin, such as figure 1 As shown, during the injection operation, if the directions of multiple injections 1' are inconsistent, it will have a greater impact on the injection effect, because some injection needles will fail to penetrate the skin and the drug solution will not be able to be absorbed. The problem of completely injecting into the skin, the liquid medicine cannot completely enter the skin, the actual injection volume will be reduced, and then there will be problems affecting the injection effect and medical effect, and the sealing glue will be affected by the injection needle during the coagulation process. The deflection causes the phenomenon of pulling the sealing glue that is about to condense, so that air bubbles or side holes appear in the sealing glue, and then it is easy to cause side leakage of the liquid medicine during use, so that the liquid medicine cannot be completely entered through the injection needle. Intradermal problems affect product quality

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