Uniform injection depth telescopic insulin syringe

Abstract

The invention discloses a uniform injection depth telescopic insulin syringe which comprises a syringe body, a limiting stopper, a positioning sleeve, a limiting nut and a contraction sleeve assembly, the limiting stopper is provided with an inner cavity, the outer wall of the limiting stopper is provided with limiting wings, the syringe body is installed in the inner cavity, a needle head extends out of the limiting stopper, the positioning sleeve is provided with a middle cavity, the upper part of the outer wall of the positioning sleeve is provided with a vertical sliding groove, the lower part is provided with external threads, the limiting wings are embedded into the vertical sliding groove and extends out of the positioning sleeve, the limiting stopper is arranged in the middle cavity in a vertically sliding mode, the limiting nut is provided with an outer cavity, internal threads are arranged in the outer cavity, and the positioning sleeve is connected in the outer cavity in a threaded mode. When the limiting nut is rotated, the upper end face of the limiting nut abuts against the limiting wings to limit the length of the needle extending out of the positioning sleeve. According to the syringe, the defect that the injection depth is limited by the length of the needle is overcome, the defect that the injection depth can only be manually controlled is overcome, meanwhile, fear of an injected person to the needle is eliminated, and comfort in the treatment and rehabilitation process is achieved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a unified injection depth retractable insulin syringe. Background technique [0002] With the increasing number of diabetic patients, daily insulin injections have become very frequent. Insulin syringes are currently commonly used injection tools for insulin therapy. They are used with needles for insulin syringes to complete subcutaneous injections. The thickness of the human skin is generally 0.5-3mm (excluding the subcutaneous tissue). In order to allow the needle to inject into the subcutaneous tissue and prevent injection into the muscle, the safe injection depth of insulin is generally 4-6mm. [0003] At present, the needle types commonly used in clinical practice are 4mm, 5mm, 6mm, 8mm and 12.7mm. Most of the existing insulin syringe needles use 4-6mm needles to prevent injection into muscle tissue, causing insulin to absorb too quickly and unstable blood sugar co...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a telescopic insulin syringe with uniform injection depth, which overcomes the problem that needles of different specifications and lengths cannot accurately achieve safe injection (that is, the injection depth is uniform between 4-6mm), and at the same time eliminates the need for injection. The fear of needles, the elimination of pain, and the realization of comfort during therapeutic rehabilitation

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