Injection needle

Abstract

The utility model relates to the technical field of medical instruments and discloses an injection needle which comprises a needle tube, a push rod is slidably connected to the middle of the needle tube, a piston is fixedly connected to the bottom of the push rod, a needle seat is slidably connected to the bottom of the needle tube, and a needle body is fixedly connected to the middle of the bottom side of the needle seat. A plurality of side holes which are uniformly distributed are formed in the bottom of the needle head, the protection assembly comprises a protection sleeve, the protection sleeve is slidably connected to the periphery of the needle head, the top of the protection sleeve is slidably connected to the periphery of the bottom of the needle seat, the sealing assembly comprises a sealing ring, and the sealing ring is fixedly connected to the periphery of the bottom of the needle seat. A sealing groove is formed in the inner side of the top of the protective sleeve, and the sealing ring is connected into the sealing groove in an embedded mode. According to the utility model, the side holes are formed in the periphery of the bottom end of the needle head, and liquid medicine can uniformly flow out in the injection process through the uniformly distributed holes in the side surface, so that the local pressure and stimulation of the liquid medicine to tissues are reduced, and the local discomfort is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an injection needle. Background Art

[0002] A syringe is a medical device used to inject medicine, liquid or other substances into the human or animal body. It is one of the common tools in the medical and nursing fields, used to give patients precise doses and ensure that the medicine can be effectively delivered to the target location. The syringe needle is an indispensable part of the syringe. The syringe needle is the tip part connected to the syringe, which is used to penetrate the skin and tissue to deliver medicine or liquid into the body.

[0003] Chinese patent announcement number: CN208481819U discloses a syringe needle, which includes a needle seat, a needle body and a needle cap. The open end of the needle cap is provided with a first magnetic attraction component, and the end of the needle seat connected to the needle body is provided with a second magnetic attraction component. When the needle cap is buckled on the needle seat, the needle cap and the needle seat are magnetically connected through the first magnetic attraction component and the second magnetic attraction component. That is, the magnetic force generated by the first magnetic attraction component and the second magnetic attraction component of the syringe provided by the utility model when approaching has a guiding effect, so that the needle cap can be more easily and accurately put back on the needle body through the magnetic force with a guiding effect when it is put back, effectively reducing the situation where the needle body stabs medical staff; in addition, when the needle cap is put on the needle body, it can be more tightly connected to the needle seat through the magnetic force between the first magnetic attraction component and the second magnetic attraction component, so that the needle cap is not easy to fall off, which can effectively reduce the damage caused by the falling of the needle cap to the relevant contact personnel. Compared with the syringe needle in the prior art, it has better safety performance.

[0004] The above-mentioned syringe needle has only one injection hole, which will cause uneven distribution of the drug in the tissue around the injection point, affecting the absorption and effect of the drug, especially when the treatment requires widespread dispersion of the drug. Therefore, an injection needle is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides an injection needle, which aims to improve the problem in the prior art that the local uneven distribution of drugs causes some areas to be affected by higher doses while other areas are affected by lower doses, making the treatment effect difficult to predict and control.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an injection needle, including a needle tube, a push rod slidably connected to the middle of the needle tube, a piston fixedly connected to the bottom of the push rod, a needle seat slidably connected to the bottom of the needle tube, a needle fixedly connected to the middle of the bottom side of the needle seat, a plurality of evenly distributed side holes are opened at the bottom of the needle, and a protective component is arranged on the periphery of the needle.

[0007] Through the above technical solution, multiple evenly distributed side holes allow the drug to be evenly released from multiple directions during injection, which helps to expand the distribution range of the drug in the target tissue or blood flow and improve the effectiveness of the injection.

[0008] Furthermore, the protection component includes a protection sleeve, which is slidably connected to the outer periphery of the needle, and the top of which is slidably connected to the outer periphery of the bottom of the needle seat. A sealing component is provided on the inner side of the top of the protection sleeve and the outer periphery of the bottom of the needle seat.

[0009] Through the above technical solution, the protective cover as a protective suit effectively prevents the needle from being contaminated by the outside world. It is wrapped around the outer periphery of the needle and provides a physical barrier to prevent bacteria, dust or other contaminants from adhering to the surface of the needle.

[0010] Furthermore, the sealing assembly comprises a sealing ring, which is fixedly connected to the outer periphery of the bottom of the needle seat. A sealing groove is provided on the inner side of the top of the protective sleeve, and the sealing ring is embedded in the sealing groove.

[0011] Through the above technical solution, the combination of the sealing ring and the sealing groove ensures the internal sealing of the protective sleeve, and effectively prevents the drug solution from leaking from the side hole and the needle injection hole.

[0012] Furthermore, the piston is slidably connected to the inner side of the needle tube.

[0013] Through the above technical solution, the piston slides in the needle tube through the push rod, thereby pushing the drug solution into the needle.

[0014] Furthermore, the material used for the piston is ethylene propylene rubber.

[0015] Through the above technical solutions, EPDM rubber exhibits good chemical stability in many chemical environments and has excellent tolerance to a variety of drugs and chemicals.

[0016] Furthermore, the material used for the needle is stainless steel.

[0017] Through the above technical solution, stainless steel has excellent corrosion resistance and can be used for a long time in a humid environment without rusting or corroding. This is especially important for medical devices because needles will come into contact with various drugs and biological fluids and need to have good corrosion resistance to ensure safety and hygiene.

[0018] Furthermore, the bottom of the needle is designed to be beveled.

[0019] Through the above technical solution, the beveled design helps to reduce the tingling sensation during puncture. Compared with the flat-cut bottom, the beveled bottom can penetrate the skin and tissue more smoothly, reducing direct contact with nerve endings, thereby alleviating pain.

[0020] Furthermore, the needle tube, the needle seat and the needle are connected.

[0021] Through the above technical solution, the needle tube, the needle seat and the needle are connected, ensuring that the drug solution can be pushed into the needle by the piston.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the present invention, by providing a plurality of evenly distributed side holes at the injection end of the needle, a wider distribution range of the drug solution can be achieved during injection, which helps to evenly distribute the drug in the target tissue or blood flow, improves the injection effect, and ensures that the drug can cover the target area more comprehensively.

[0024] 2. In the utility model, a protective sleeve is arranged on the outer periphery of the needle, which not only protects the sanitary condition of the needle, but also improves the overall safety of the syringe. By effectively preventing external contamination and leakage of liquid medicine, the use process of the syringe is more reliable and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional schematic diagram of an injection needle proposed by the utility model;

[0026] Figure 2 This is a schematic structural diagram of a piston of an injection needle proposed by the utility model;

[0027] Figure 3 This is a structural schematic diagram of a needle seat of an injection needle proposed by the utility model;

[0028] Figure 4 for Figure 3 A magnified image of point A;

[0029] Figure 5 for Figure 3 Enlarged view of point B.

[0030] Legend:

[0031] 1. Needle tube; 2. Push rod; 3. Needle seat; 4. Needle; 5. Protective cover; 6. Side hole; 7. Sealing ring; 8. Sealing groove; 9. Piston. DETAILED DESCRIPTION

[0032] The following will be combined with the attached embodiment of the present utility model Figures 1 to 5, clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1 , Figure 2 and Figure 4 The utility model provides an embodiment: an injection needle, including a needle tube 1, a push rod 2 is slidably connected to the middle of the needle tube 1, a piston 9 is fixedly connected to the bottom of the push rod 2, the piston 9 is slidably connected to the inner side of the needle tube 1, the material used for the piston 9 is ethylene propylene rubber, a needle seat 3 is interference fit at the bottom of the needle tube 1, a needle 4 is fixedly connected to the middle of the bottom side of the needle seat 3, the material used for the needle 4 is stainless steel, the bottom of the needle 4 is an oblique design, a plurality of evenly distributed side holes 6 are opened at the bottom of the needle 4, the needle tube 1, the needle seat 3 and the needle 4 are connected, and a protective component is arranged on the periphery of the needle 4.

[0034] Specifically, the needle tube 1 is a tubular part for containing and guiding the medicine, the push rod 2 is a sliding connection part for pushing the piston 9 during the injection process, pushing the medicine through the needle 4 and injecting it into the patient's body, the piston 9 is a part for pushing the medicine during the injection process, the piston 9 is made of EPDM and has good sealing and durability, the needle seat 3 is a sliding connection part located at the bottom of the needle tube 1, and is used to fix the needle 4, the needle 4 is a part for penetrating the patient's skin and tissue to inject the medicine into the body, and is made of stainless steel, with a beveled bottom design to reduce the resistance during puncture, a plurality of evenly distributed side holes 6 are provided at the bottom of the needle 4 to improve the dispersion of the medicine during the injection process, the side holes 6 are multiple evenly distributed holes, located at the bottom of the needle 4, which help to ensure that the medicine is more evenly dispersed into the tissue during the injection process, the needle tube 1, the needle seat 3 and the needle 4 are connected to form a continuous channel to ensure that the medicine is smoothly injected from the needle tube 1 into the patient's body.

[0035] Reference Figure 1 , Figure 3 The protection component includes a protection sleeve 5, which is sleeved on the outer periphery of the needle 4, and its top is interference fit on the outer periphery of the bottom of the needle seat 3. A sealing component is provided on the inner side of the top of the protection sleeve 5 and the outer periphery of the bottom of the needle seat 3.

[0036] Specifically, the protective sleeve 5 is a sleeve-shaped part used to provide additional safety and protection. The protective sleeve 5 is sleeved on the outer periphery of the needle 4 , and the top of the protective sleeve 5 is interference-fitted on the outer periphery of the bottom of the needle seat 3 .

[0037] Reference Figure 3 , Figure 5The sealing assembly includes a sealing ring 7, which is fixedly connected to the outer periphery of the bottom of the needle seat 3. A sealing groove 8 is opened on the inner side of the top of the protective sleeve 5, and the sealing ring 7 is embedded in the sealing groove 8.

[0038] Specifically, the sealing ring 7 is a ring-shaped component used to provide sealing properties, which is fixedly connected to the outer periphery of the bottom of the needle seat 3. The sealing groove 8 is a groove-shaped structure located on the inner side of the top of the protective sleeve 5, which is used to accommodate the sealing ring 7. The design of the sealing groove 8 allows the sealing ring 7 to be fully embedded and connected therein, ensuring that an effective seal is formed between the protective sleeve 5 and the needle 4 to prevent drug leakage or contamination.

[0039] Working principle: Push the push rod 2 to drive the piston 9 to push the liquid medicine in the syringe 1 into the needle 4, and insert the injection end of the needle 4 into the patient's blood vessel. Because the bottom end of the needle 4 is provided with a plurality of evenly distributed side holes 6, the liquid medicine can be dispersed in a wider area, so that the medicine is more evenly distributed to the tissue or organ that needs to be treated, which helps to ensure the effectiveness and therapeutic effect of the medicine.

[0040] The protective sleeve 5 is slidably connected to the outer periphery of the needle 4, and its top sealing groove 8 is engaged with the sealing ring 7 on the outer periphery of the needle seat 3, so that the inside of the protective sleeve 5 is completely sealed to prevent the drug solution from leaking from the side hole 6 and the injection hole of the needle 4. The protective sleeve 5 can also ensure that the outer periphery of the needle 4 will not be contaminated, keeping the needle 4 hygienic.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection needle, comprising a needle tube (1), characterized in that: The middle of the needle tube (1) is slidably connected to a push rod (2), the bottom of the push rod (2) is fixedly connected to a piston (9), the needle tube (1) is interference-fitted with a needle seat (3), the middle of the bottom side of the needle seat (3) is fixedly connected to a needle head (4), the bottom of the needle head (4) is provided with a plurality of evenly distributed side holes (6), and a protective component is arranged on the periphery of the needle head (4).

2. An injection needle according to claim 1, characterized in that: The protection component comprises a protection sleeve (5), the protection sleeve (5) being sleeved on the outer periphery of the needle head (4), the top of the protection sleeve (5) being interference-fitted on the outer periphery of the bottom of the needle seat (3), and a sealing component being arranged on the inner side of the top of the protection sleeve (5) and the outer periphery of the bottom of the needle seat (3).

3. An injection needle according to claim 2, characterized in that: The sealing assembly comprises a sealing ring (7), the sealing ring (7) being fixedly connected to the outer periphery of the bottom of the needle seat (3), a sealing groove (8) being provided on the inner side of the top of the protective sleeve (5), and the sealing ring (7) being engaged and connected in the sealing groove (8).

4. The injection needle according to claim 1, characterized in that: The piston (9) is slidably connected to the inner side of the needle tube (1).

5. The injection needle according to claim 1, characterized in that: The material used for the piston (9) is ethylene propylene rubber.

6. The injection needle according to claim 1, characterized in that: The material used for the needle (4) is stainless steel.

7. An injection needle according to claim 1, characterized in that: The bottom of the needle (4) is designed to be beveled.

8. The injection needle according to claim 1, characterized in that: The needle tube (1), the needle seat (3) and the needle head (4) are connected.

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