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Disposable safe syringe with automatically-retracted and replaceable needle

A safety syringe and automatic retraction technology, applied in the field of medical devices, can solve the problem of no replacement of needles, etc., and achieve the effects of high qualification rate, reasonable structure design and reliable function

Inactive Publication Date: 2012-04-11
徐昊华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing disposable syringes, especially safety syringes whose needles can retract automatically, generally do not have the function of changing needles.

Method used

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  • Disposable safe syringe with automatically-retracted and replaceable needle
  • Disposable safe syringe with automatically-retracted and replaceable needle
  • Disposable safe syringe with automatically-retracted and replaceable needle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The present invention is a disposable safety syringe with a needle that can be retracted automatically and can be replaced. Figure 1 to Figure 5 As shown, it includes a syringe 1 and a push rod 2, the push rod 2 is inserted into the inner cavity of the syringe 1, and is characterized in that it also includes a dispensing needle 3 and an injection needle 4. The medicine dispensing needle 3 includes a medicine dispensing needle tube 3a and a medicine dispensing needle base 3b, and the medicine dispensing needle tube 3a is fixed on the medicine dispensing needle base 3b. The injection needle 4 has a device and function that can be triggered (triggered) to automatically retract, and its components include an injection needle tube 4a, an injection needle seat 4b, a needle seat cover 4c, a compression spring 4d and a compression spring cap 4e. The rear end of the injection needle holder 4b is fixedly connected to the disc 4b2 through the integral sheet 4b1, and the inject...

Embodiment 2

[0035]This embodiment is basically similar to Embodiment 1, except that the syringe of the present invention further includes a dispensing needle sheath 3c, which is looped on the dispensing needle base 3b to protect the dispensing needle tube 3a; There are butterfly wings 3b2 or edges and corners 3b4 or surface knurling, and the butterfly wings 3b2 or edges and corners 3b4 are evenly distributed on the outer periphery of the dispensing needle base 3b, which is convenient for holding and screwing; the dispensing needle tube 3a of the dispensing needle 3 is made of oblique incision needle tip , or the needle tip is made into a conical tip 3a1 and a structure with a side hole 3a2.

Embodiment 3

[0037] This embodiment is basically similar to Embodiment 1, such as Figure 4 As shown, the difference is that the syringe of the present invention further includes an injection needle sheath 4f, which is looped over the front end of the needle seat sheath 4c of the injection needle 4 to protect the injection needle tube 4a. Corresponding inner tooth grooves 4f1 and outer tooth grooves 4c2 are respectively provided on the inner edge of the injection needle sheath 4f and the outer edge of the needle seat sleeve 4c. When the injection needle sheath 4f and the needle seat sleeve 4c are sleeved together, their inner tooth grooves 4f1 and the outer tooth slot 4c2 are staggered (inserted) with each other, the outer edge of the injection needle sheath 4f is also provided with butterfly wings 4f2 or edges and corners 3b4 or surface knurling, and the outer edge of the needle seat cover 4c also has surface knurling, and the butterfly wings 4f2 Or the edges and corners 4f3 are evenly di...

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Abstract

The invention discloses a disposable safe syringe with an automatically-retracted and replaceable needle, and relates to the technical field of medical instruments. The disposable safe syringe comprises a needle cylinder (1) and a push rod (2), and also comprises a dosing needle (3) and an injection needle (4); and the dosing needle (3) or the injection needle (4) can be replaced according to use requirement, so the needle cannot be deformed and the finish and sharpness of the needle are not influenced due to injection, and further the adverse effect on a human body cannot be generated. During clinical use, the traditional operating habits are not basically changed, the syringe has the advantages of convenient use and reliable function, the injection needle after the injection can be retracted and hidden through an automatic retract mechanism, the medical staff and the patient are ensured not to be accidentally injured by the polluted needle point, the syringe used cannot be repeatedly used, the disposable use of the syringe in the true sense is realized, and the transmission of blood borne diseases is avoided. Due to the reasonable structural design, the disposable safe syringe is suitable for automatic assembly in production lines, and has the advantages of good quality and high qualification rate.

Description

technical field [0001] The present invention relates to the technical field of medical instruments, in particular to a disposable safety syringe with an automatically retractable and replaceable needle. Background technique [0002] The use of disposable sterile syringes for clinical injection of medicinal liquids and vaccinations has played a positive role in controlling iatrogenic infectious diseases and preventing cross-infection. However, various existing disposable syringes—including self-destructing, manual retracting, self-retracting and other forms of disposable syringes—due to imperfect design and structure, lack some required functions, and cannot Fully meet the needs of use. For example, when a dry powder injection is used to prepare a liquid, after the solution is injected into the sealed powder drug container, the syringe needle will inevitably be deformed and the smoothness and sharpness of the needle will be affected. Strictly speaking, the puncture stopper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/178A61M5/32
Inventor 蒋文俊徐昊华
Owner 徐昊华
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