An acupuncture needle

Abstract

The acupuncture needle described in the present invention includes a needle tube and a needle core; a needle tip is provided at one end of the needle tube, an adjustment portion is provided at the other end of the needle tube, and a receiving hole is provided in the needle tube along the length direction thereof and parallel to the needle tube body; the needle core passes through the receiving hole, and the end of the needle core corresponding to the needle tip of the needle tube is provided with a curved blunt-mouth structure, and a pull-out handle is provided at the end of the needle core close to the needle tube adjustment portion, and the needle core is connected to the adjustment portion of the needle tube via a connector; pushing the pull-out handle drives the curved blunt-mouth structure to extend outward from the needle tip of the needle tube. In addition, the needle core is made of a composite needle core material. The acupuncture needle described in the present invention can flexibly adjust the sweeping length, and because the overall bending strength and fracture toughness of the needle core material are greatly improved, and because it can continuously release antibacterial ions, it can greatly reduce the treatment pain and risks of patients with psoriasis.

Description

Technical Field

[0001] The present invention relates to the technical field related to biomedical equipment, and in particular to an acupuncture needle for treating gynecomastia based on a composite material. Background Art

[0002] In the treatment of hickeys, acupuncture, as a traditional and widely used Chinese medicine method, plays an important role. Acupuncture stimulates specific acupuncture points to adjust the body's qi, blood, and meridians to relieve symptoms related to hickeys, such as pain, soreness, and swelling, thereby improving the patient's physical condition. In recent years, floating needle therapy, as an innovative external treatment method, performs a sweeping operation in the superficial subcutaneous layer near or distal to the painful area without piercing the muscle. By loosening fascial adhesions, it promotes local blood circulation, quickly relieves muscle tension and pain, and thus has a good effect on the treatment of hickeys. However, the acupuncture needles currently used in the floating needle therapy for the treatment of hickeys are still of traditional structure, and there are many disadvantages in actual application.

[0003] First, the sweeping distance cannot be flexibly adjusted. During acupuncture treatment, the sweeping action is intended to better stimulate the meridian qi and promote the circulation of qi and blood, thereby enhancing the therapeutic effect. Patients with bulges of wealth vary in size, location, severity, and individual constitution. In theory, the sweeping distance should be able to be flexibly adjusted to precisely target the affected area. However, existing acupuncture needles are often designed with a fixed sweeping distance that cannot be adjusted to suit specific treatment needs. This makes it difficult for acupuncturists to implement the most appropriate treatment for the diverse and complex bulges of wealth, potentially affecting treatment effectiveness and failing to fully meet diverse clinical treatment needs. For example, for smaller and shallow bulges of wealth, an excessively large fixed sweeping distance may irritate unwanted surrounding tissues and cause discomfort. For larger and deeper bulges of wealth, an excessively small fixed sweeping distance may not fully cover the affected area, preventing the treatment from reaching its full potential. Consequently, in practice, multiple needles must be replaced during a single treatment, resulting in significant material waste and the corresponding need for multiple punctures, which is painful for the patient.

[0004] Secondly, the floating needle therapy for guillotine bag requires frequent sweeping, which places high demands on the strength and toughness of the acupuncture needles. However, existing ordinary acupuncture needles have certain defects in material and manufacturing process. The lack of strength makes the acupuncture needles prone to bending or even breaking when encountering tougher tissues. Once an acupuncture needle breaks inside the patient's body, it will not only cause great pain to the patient, but may also cause serious medical accidents. At the same time, the poor toughness makes the acupuncture needles unable to adapt well to the complex human tissue environment during routine operations such as sweeping, and the operation feel is poor, affecting the acupuncturist's operation accuracy and treatment effect. For example, when acupuncturing the tougher muscles or fascia tissues around the guillotine bag, the acupuncture needles are prone to bending, and the acupuncturist has to spend extra energy to adjust the position and angle of the needle, which not only increases the difficulty of operation, but may also prolong the treatment time and reduce the patient's treatment experience.

[0005] Furthermore, acupuncture treatment requires the needle to be inserted directly into the human skin. If the needle's antibacterial properties are insufficient, it can easily lead to infection risks during use. In clinical use, ordinary acupuncture needles themselves have poor antibacterial properties. Even after routine disinfection, acupuncture needles may still carry bacteria and other microorganisms, causing localized infection, such as redness, swelling, increased pain, and fever at the puncture site, affecting the patient's physical health and subsequent treatment progress. This risk is even greater for patients with low immunity or underlying diseases.

[0006] Therefore, the present invention aims to develop an acupuncture needle for treating dysplasia pellucida to better meet actual needs. Summary of the Invention

[0007] The technical problem solved by the present invention is to provide an acupuncture needle to solve the problems in the prior art that the sweeping distance of ordinary acupuncture needles during the treatment of gynecological hives cannot be flexibly adjusted, frequent punctures are required in actual application, and materials are wasted.

[0008] The technical problem solved by the present invention further lies in improving the strength and toughness of ordinary acupuncture needles to prevent needle breakage, bending, etc. during the Fuguibao floating needle therapy.

[0009] The technical problem solved by the present invention is to further improve the antibacterial properties of acupuncture needles to prepare acupuncture needles for treating gynecomastia with excellent comprehensive performance.

[0010] The technical solutions of the present invention are as follows:

[0011] An acupuncture needle comprises a needle tube and a needle core; a needle tip is provided at one end of the needle tube, an adjustment portion is provided at the other end of the needle tube, and a receiving through hole parallel to the needle tube body is provided in the needle tube along the length direction; the needle core passes through the receiving through hole, and the end of the needle core corresponding to the needle tip of the needle tube is provided with a curved blunt-mouth structure, and a pulling handle is provided at the end of the needle core close to the needle tube adjustment portion, and the needle core is connected to the adjustment portion of the needle tube through a connecting piece; pushing the pulling handle drives the curved blunt-mouth structure to extend outward from the needle tip of the needle tube, and adjusting the connection position of the connecting piece and the adjustment portion on the needle tube changes the extension distance of the curved blunt-mouth structure.

[0012] Furthermore, a plurality of mounting through holes are arranged on the needle tube adjustment portion at intervals along the length direction of the needle tube body, and the connecting piece is an elastic pin structure, which is clamped in different mounting through holes so that the arc-shaped blunt-mouth structure has different extension distances.

[0013] Furthermore, at least three mounting through holes are arranged on the needle tube adjusting portion at intervals along the length direction of the needle tube body.

[0014] Furthermore, the elastic pin structure includes an elastic column and a pressing column connected to the elastic column, the elastic column is fixedly connected to the needle core, and the pressing column is adapted to the mounting through hole on the needle tube.

[0015] Furthermore, a limiting groove adapted to the elastic pin structure is provided on the inner wall of the needle tube along the length direction.

[0016] Furthermore, the sweeping arc of the needle core is 50-70°.

[0017] Furthermore, a protruding limiting ring is provided on the outside of the needle tube.

[0018] Furthermore, the needle core is made of a composite needle core material, and the preparation method of the composite needle core material includes the following steps:

[0019] 1) Using nickel-titanium alloy wire as the needle core substrate, the surface of the needle core substrate is sandblasted with aluminum oxide particles;

[0020] 2) Under nitrogen protection, a nanocrystalline Ni-Ti alloy matrix bonding layer, a TiN / Ni-Ti mixed transition layer, and a high-hardness TiN surface layer are sequentially formed on the sandblasted needle core surface;

[0021] 3) Immersing the needle core substrate treated in step 2) in an ethanol suspension containing silver nanoparticles and copper ions, applying a pulsed electric field to direct the adsorption of the nanoparticles on the surface of the needle body substrate; then heating in a vacuum furnace to allow the Ag-Cu nanoparticles to bond to the needle core substrate, thereby forming an Ag-Cu-Ti ternary antibacterial layer on the surface of the needle core substrate;

[0022] 4) Etching a spiral groove on the surface of the needle core substrate treated in step 3).

[0023] Furthermore, in step 2), a pulsed laser cladding technology is used to form a composite layer on the surface of the needle core that has been sandblasted, wherein the laser power is 700-900 W and the scanning speed is 4-6 mm / s.

[0024] Furthermore, in step 2), the thickness of the substrate bonding layer is 20 to 30 μm, and the grain size of the Ni-Ti alloy powder in the substrate bonding layer is ≤100 nm; the thickness of the transition layer is 20 to 30 μm, and the transition layer is a mixture of nano-titanium nitride and Ni-Ti alloy powder in a mass ratio of 1:2 to 4; the thickness of the TiN surface layer is 10 to 15 μm.

[0025] Beneficial Effects: The acupuncture needles described herein utilize a core-tube combination. After the tube pierces the skin, the core extends further to adjust the length of the needle according to the desired length of the needle. This flexible adjustment allows for precise treatment of hickeys, eliminating the need for frequent needle changes and punctures, significantly saving material costs and reducing the risk of infection from frequent punctures. Furthermore, the core tip is designed with a curved blunt-ended structure, which can loosen fascial adhesions, promote local blood circulation, and rapidly relieve muscle tension and pain while significantly reducing the risk of subcutaneous blood vessel puncture and bleeding and alleviating pain, significantly reducing the pain and risks of treatment for patients.

[0026] The acupuncture needles described in the present invention have a core made of a composite core material. Compared with ordinary acupuncture needles, their overall bending strength and fracture toughness are greatly improved, and they can release antibacterial ions for a long time. The antibacterial rate against Staphylococcus aureus is greater than 99.5% within 72 hours. Therefore, the acupuncture needles for treating gynecomastia described in the present invention have excellent strength and toughness, as well as good antibacterial properties, and have excellent comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the acupuncture needle in Example 1 of the present invention.

[0028] Figure 2 Schematic diagram of the connection structure between the needle core and the needle tube in Example 1 of the present invention.

[0029] Figure 3 This is a schematic structural diagram of the limiting groove on the inner wall of the needle tube in Example 1 of the present invention.

[0030] Figure 4 This is a structural schematic diagram of the needle core extending from the needle tip of the needle tube in Example 1 of the present invention.

[0031] Among them: 1. needle tube; 11. adjustment part; 111. installation through hole; 112. limiting groove; 12. needle tip; 13. tube mouth; 14. limiting ring; 15. accommodating through hole; 2. needle core; 21. connecting part; 211. elastic column; 212. pressing column; 22. arc-shaped blunt-mouth structure; 23. pull-out handle. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific embodiments.

[0033] Example 1

[0034] An acupuncture needle for treating gynecomastia, such as Figure 1 As shown, it includes a needle tube 1 and a needle core 2; a needle tip 12 is provided at one end of the needle tube 1, and the needle tip 12 is used for rapid subcutaneous puncture, an adjustment portion 11 is provided at the other end of the needle tube 1, and an accommodating through hole 15 is provided in the needle tube 1 along the length direction and parallel to the needle tube body of the needle tube 1.

[0035] The needle core 2 passes through the accommodating through hole 15, and there is a gap between the needle core 2 and the inner wall of the accommodating through hole 15. The end of the needle core 2 corresponding to the needle tip 12 of the needle tube 1 is set to a curved blunt-mouth structure 22, preferably a hemispherical structure, or a spherical structure, so that when a large area of ​​subcutaneous tissue is swept during the treatment of pimples, fascia adhesions can be loosened, local blood circulation can be promoted, and muscle tension and pain can be quickly relieved. At the same time, the risk of puncture and bleeding of subcutaneous blood vessels is greatly reduced and pain is relieved, greatly reducing the patient's treatment pain and risk.

[0036] A pulling handle 23 is provided on the needle core 2 at one end close to the adjusting portion 11 of the needle tube 1, and the needle core 2 is connected to the adjusting portion 11 of the needle tube 1 through the connecting piece 21; the needle core 2 is pulled by the pulling handle 23, and the pulling handle 23 is pushed to drive the arc-surface blunt-mouth structure 22 of the needle core 2 to extend outward from the needle tip 12 of the needle tube 1, and the connection position of the connecting piece 21 and the adjusting portion 11 on the needle tube 1 is adjusted to change the extension distance of the arc-surface blunt-mouth structure 22.

[0037] Specifically, such as Figure 1 As shown, the needle tube 1 adjustment portion 11 is provided with a plurality of mounting through holes 111 spaced apart along the length direction of the needle tube 1. In this embodiment, there are preferably at least three mounting through holes 111, so that at least three levels of adjustment can be performed. The connecting member 21 is an elastic pin structure, such as Figure 2As shown, the elastic pin structure is locked in different mounting holes 111, so that the curved blunt-mouthed structure 22 has different extension distances. The elastic pin structure includes an elastic column 211 and a pressing column 212 connected to the elastic column 211. The elastic column 211 is fixedly connected to the needle core 2, and the pressing column 212 is adapted to the mounting hole 111 on the needle tube 1. Therefore, in actual application, by pressing the pressing column 212, the elastic pin structure as a whole can be retracted inward, and then the needle core 2 can be pushed by pushing the handle. When it is pushed to the next adjacent mounting hole 111, the pressing column 212 is free to deform and pop out and lock into the corresponding mounting hole 111, thereby completing the adjustment of different sweeping distances.

[0038] like Figure 3 As shown, the inner wall of the needle tube 1 is provided with a limiting groove 112 along its length that is compatible with the elastic pin structure. As the needle core 2 is pushed, the elastic pin structure slides along the limiting groove 112, making the adjustment process smooth and accurate. In some improved embodiments, the elastic pin structure on the surface of the needle core 2 is arranged with multiple reinforcing columns at intervals along the circumference; the inner wall of the needle tube 1 is provided with a second limiting groove 112 along its length that is compatible with the reinforcing columns, thereby further improving the smoothness and accuracy of the sliding of the elastic pin structure during the pushing of the needle core 2.

[0039] In the present invention, a protruding stop ring 14 is provided on the exterior of the needle tube 1. This is used to control the depth of penetration of the needle tip 12 of the needle tube 1 into the skin. After penetration, the sweeping distance is further controlled by the push of the needle core 2 and the extension of the curved blunt-end structure 22. During the sweeping process, the sweeping distance can be flexibly adjusted. In the present invention, after the needle tube 1 penetrates the skin and the sweeping distance is determined, the needle is moved through the needle core 2, and the sweeping arc of the needle core 2 is 50 to 70 degrees, preferably 60 degrees.

[0040] Example 2

[0041] This embodiment is based on the embodiment 1, and the applicant has made further improvements. The needle core is made of a composite needle core material. The preparation method of the composite needle core material includes the following steps:

[0042] 1) Nickel-titanium alloy wire is used as the needle core substrate. The needle core substrate is subjected to stress relief annealing treatment under vacuum conditions, and then the surface of the needle core substrate is sandblasted with 120-mesh alumina particles to form a micron-level roughness on the surface of the needle core substrate. After treatment, the Ra value of the needle core substrate surface is about 1.8μm, which can enhance the subsequent coating bonding strength.

[0043] 2) Under nitrogen protection, a nanocrystalline Ni-Ti alloy matrix bonding layer, a TiN / Ni-Ti mixed transition layer, and a high-hardness TiN surface layer are sequentially formed on the sandblasted needle core surface;

[0044] Specifically, pulse laser cladding technology is used to form a composite layer on the sandblasted needle core surface, with a laser power of 800 W and a scanning speed of 5 mm / s. The thickness of the substrate bonding layer is 25 μm, and the grain size of the Ni-Ti alloy powder in the substrate bonding layer is ≤100 nm; the thickness of the transition layer is 20 μm, and the transition layer is a mixture of nano-titanium nitride and Ni-Ti alloy powder in a mass ratio of 1:3; the thickness of the TiN surface layer is 12 μm.

[0045] 3) Immersing the needle core substrate treated in step 2) in an ethanol suspension containing silver nanoparticles and copper ions, wherein the molar ratio of Ag to Cu in the suspension is 3:1; applying a pulsed electric field at a voltage of 50 V and a frequency of 100 Hz to directionally adsorb the nanoparticles onto the surface of the needle substrate; then heating in a vacuum furnace to 400° C. for 30 minutes to allow the Ag-Cu nanoparticles to bond to the needle core substrate, thereby forming an Ag-Cu-Ti ternary antibacterial layer on the surface of the needle core substrate;

[0046] 4) Using femtosecond laser micromachining, a spiral groove is etched on the surface of the needle core substrate treated in step 3). The groove has a width of 50 μm, a depth of 10 μm, and a spiral angle of 45°. This operation can reduce the puncture resistance by more than 40% compared to a smooth surface, while enhancing the tissue adhesion effect during sweeping.

[0047] Example 3

[0048] This embodiment is based on the embodiment 1, and the applicant has made further improvements. The needle core is made of a composite needle core material. The preparation method of the composite needle core material includes the following steps:

[0049] 1) Nickel-titanium alloy wire is used as the needle core substrate. The needle core substrate is subjected to stress relief annealing treatment under vacuum conditions, and then the surface of the needle core substrate is sandblasted with 120-mesh alumina particles to form a micron-level roughness on the surface of the needle core substrate. After treatment, the Ra value of the needle core substrate surface is about 1.8μm, which can enhance the subsequent coating bonding strength.

[0050] 2) Under nitrogen protection, a nanocrystalline Ni-Ti alloy matrix bonding layer, a TiN / Ni-Ti mixed transition layer, and a high-hardness TiN surface layer are sequentially formed on the sandblasted needle core surface;

[0051] Specifically, pulsed laser cladding technology is used to form a composite layer on the sandblasted needle core surface, with a laser power of 900 W and a scanning speed of 6 mm / s. The thickness of the substrate bonding layer is 30 μm, and the grain size of the Ni-Ti alloy powder in the substrate bonding layer is ≤100 nm; the thickness of the transition layer is 20 μm, and the transition layer is a mixture of nano-titanium nitride and Ni-Ti alloy powder in a mass ratio of 1:4; the thickness of the TiN surface layer is 15 μm.

[0052] 3) Immersing the needle core substrate treated in step 2) in an ethanol suspension containing silver nanoparticles and copper ions, wherein the molar ratio of Ag to Cu in the suspension is 4:1; applying a pulsed electric field at a voltage of 50 V and a frequency of 100 Hz to directionally adsorb the nanoparticles onto the surface of the needle substrate; then heating to 420° C. in a vacuum furnace for 28 minutes to allow the Ag-Cu nanoparticles to bond to the needle core substrate, thereby forming an Ag-Cu-Ti ternary antibacterial layer on the surface of the needle core substrate;

[0053] 4) Using femtosecond laser micromachining, a spiral groove with a width of 50 μm, a depth of 10 μm, and a spiral angle of 45° is etched on the surface of the needle core substrate processed in step 3).

[0054] Comparative Example 1

[0055] In this comparative example, the needle core is made of a composite needle core material, and the preparation method of the composite needle core material includes the following steps:

[0056] 1) A nickel-titanium alloy wire is used as a needle core substrate, and the needle core substrate is subjected to stress relief annealing treatment under vacuum conditions.

[0057] 2) Under nitrogen protection, a nanocrystalline Ni-Ti alloy matrix bonding layer, a TiN / Ni-Ti mixed transition layer, and a high-hardness TiN surface layer are sequentially formed on the sandblasted needle core surface;

[0058] Specifically, pulse laser cladding technology is used to form a composite layer on the sandblasted needle core surface, with a laser power of 800 W and a scanning speed of 5 mm / s. The thickness of the substrate bonding layer is 25 μm, and the grain size of the Ni-Ti alloy powder in the substrate bonding layer is ≤100 nm; the thickness of the transition layer is 20 μm, and the transition layer is a mixture of nano-titanium nitride and Ni-Ti alloy powder in a mass ratio of 1:3; the thickness of the TiN surface layer is 12 μm.

[0059] 3) Immersing the needle core substrate treated in step 2) in an ethanol suspension containing silver nanoparticles and copper ions, wherein the molar ratio of Ag to Cu in the suspension is 3:1; applying a pulsed electric field at a voltage of 50 V and a frequency of 100 Hz to directionally adsorb the nanoparticles onto the surface of the needle substrate; then heating in a vacuum furnace to 400° C. for 30 minutes to allow the Ag-Cu nanoparticles to bond to the needle core substrate, thereby forming an Ag-Cu-Ti ternary antibacterial layer on the surface of the needle core substrate;

[0060] 4) Using femtosecond laser micromachining, a spiral groove is etched on the surface of the needle core substrate treated in step 3). The groove has a width of 50 μm, a depth of 10 μm, and a spiral angle of 45°. This operation can reduce the puncture resistance by more than 40% compared to a smooth surface, while enhancing the tissue adhesion effect during sweeping.

[0061] Comparative Example 2

[0062] In this comparative example, the needle core is made of a composite needle core material, and the preparation method of the composite needle core material includes the following steps:

[0063] 1) Nickel-titanium alloy wire is used as the needle core substrate. The needle core substrate is subjected to stress relief annealing treatment under vacuum conditions, and then the surface of the needle core substrate is sandblasted with 120-mesh alumina particles to form a micron-level roughness on the surface of the needle core substrate. After treatment, the Ra value of the needle core substrate surface is about 1.8μm, which can enhance the subsequent coating bonding strength.

[0064] 2) Under nitrogen protection, a high-hardness TiN surface layer is formed on the sandblasted surface of the needle core; specifically, a pulsed laser cladding technology is used to form a high-hardness TiN surface layer on the sandblasted surface of the needle core, with a laser power of 800 W and a scanning speed of 5 mm / s. The thickness of the TiN surface layer is 12 μm.

[0065] 3) Immersing the needle core substrate treated in step 2) in an ethanol suspension containing silver nanoparticles and copper ions, wherein the molar ratio of Ag to Cu in the suspension is 3:1; applying a pulsed electric field at a voltage of 50 V and a frequency of 100 Hz to directionally adsorb the nanoparticles onto the surface of the needle substrate; then heating in a vacuum furnace to 400° C. for 30 minutes to allow the Ag-Cu nanoparticles to bond to the needle core substrate, thereby forming an Ag-Cu-Ti ternary antibacterial layer on the surface of the needle core substrate;

[0066] 4) Using femtosecond laser micromachining, a spiral groove is etched on the surface of the needle core substrate treated in step 3). The groove has a width of 50 μm, a depth of 10 μm, and a spiral angle of 45°. This operation can reduce the puncture resistance by more than 40% compared to a smooth surface, while enhancing the tissue adhesion effect during sweeping.

[0067] Comparative Example 3

[0068] In this comparative example, the needle core is made of a composite needle core material, and the preparation method of the composite needle core material includes the following steps:

[0069] 1) Nickel-titanium alloy wire is used as the needle core substrate. The needle core substrate is subjected to stress relief annealing treatment under vacuum conditions, and then the surface of the needle core substrate is sandblasted with 120-mesh alumina particles to form a micron-level roughness on the surface of the needle core substrate. After treatment, the Ra value of the needle core substrate surface is about 1.8μm, which can enhance the subsequent coating bonding strength.

[0070] 2) Under nitrogen protection, a nanocrystalline Ni-Ti alloy matrix bonding layer, a TiN / Ni-Ti mixed transition layer, and a high-hardness TiN surface layer are sequentially formed on the sandblasted needle core surface;

[0071] Specifically, pulse laser cladding technology is used to form a composite layer on the sandblasted needle core surface, with a laser power of 800 W and a scanning speed of 5 mm / s. The thickness of the substrate bonding layer is 25 μm, and the grain size of the Ni-Ti alloy powder in the substrate bonding layer is ≤100 nm; the thickness of the transition layer is 20 μm, and the transition layer is a mixture of nano-titanium nitride and Ni-Ti alloy powder in a mass ratio of 1:3; the thickness of the TiN surface layer is 12 μm.

[0072] 3) coating the surface of the needle core substrate treated in step 2) with an antibacterial coating containing silver nanoparticles;

[0073] 4) Using femtosecond laser micromachining, a spiral groove is etched on the surface of the needle core substrate treated in step 3). The groove has a width of 50 μm, a depth of 10 μm, and a spiral angle of 45°. This operation can reduce the puncture resistance by more than 40% compared to a smooth surface, while enhancing the tissue adhesion effect during sweeping.

[0074] Comparative Example 4

[0075] Ordinary stainless steel 316 acupuncture needles were used.

[0076] The acupuncture needles described in Examples 2 to 3 and Comparative Examples 1 to 4 were subjected to performance testing.

[0077] The flexural strength was tested according to ISO 7438 “Bending Tests for Metallic Materials”, and the fracture toughness test was tested according to the micro-compact tensile (CT) specimen method in ASTM E399 “Standard Test Method for Plane Strain Fracture Toughness of Metallic Materials”. The antibacterial performance was tested by in vitro bacterial co-culture for 24 h and 72 h, according to the quantitative suspension method of ISO 22196. The results are shown in Table 1.

[0078] Table 1 Test results of needle core material properties in various embodiments and comparative examples

[0079]

[0080] As shown in Table 1, the composite needle core prepared in this application exhibits excellent comprehensive performance in terms of bending resistance, toughness, and antibacterial properties, far surpassing traditional stainless steel acupuncture needles. This effectively prevents traditional acupuncture needles from breaking and bending due to their lack of toughness, making them unsuitable for the complex human tissue environment during the treatment of lumps of pus. This significantly reduces the risk faced by acupuncturists during lumps of pus treatment and improves operational convenience and accuracy. Furthermore, this application exhibits excellent long-term antibacterial properties, achieving an antibacterial activity against Staphylococcus aureus exceeding 99.9% through the sustained release of antibacterial ions, thereby further reducing the risk of infection. As shown in the various comparative examples, the process of this application is holistic, with control of each process step and parameter being crucial and synergistic between the steps. As shown in Comparative Example 3, improper control of the composite layer formed using pulsed laser cladding technology can adversely affect the antibacterial rate of the resulting needle core material.

[0081] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An acupuncture needle, characterized in that: The needle tube comprises a needle core; a needle tip is provided at one end of the needle tube, an adjustment portion is provided at the other end of the needle tube, and a receiving hole is provided in the needle tube along the length direction thereof and parallel to the needle tube body; the needle core passes through the receiving hole, and the end of the needle core corresponding to the needle tip of the needle tube is provided with a curved blunt-mouth structure, and a pull-out handle is provided at the end of the needle core close to the needle tube adjustment portion, and the needle core is connected to the adjustment portion of the needle tube via a connecting piece; pushing the pull-out handle drives the curved blunt-mouth structure to extend outward from the needle tip of the needle tube, and adjusting the connection position of the connecting piece and the adjustment portion on the needle tube changes the extension distance of the curved blunt-mouth structure; There is a gap between the needle core and the inner wall of the accommodating through hole, the connecting piece is an elastic pin structure, and the sweeping arc of the needle core is 50 to 70 degrees; The needle core includes a needle core substrate and an Ag-Cu-Ti ternary antibacterial layer arranged on the surface of the needle core substrate; The needle core is made of a composite needle core material, and the preparation method of the composite needle core material includes the following steps: 1) Using nickel-titanium alloy wire as the needle core substrate, the surface of the needle core substrate is sandblasted with aluminum oxide particles; 2) Under nitrogen protection, a nanocrystalline Ni-Ti alloy matrix bonding layer, a TiN / Ni-Ti mixed transition layer, and a high-hardness TiN surface layer are sequentially formed on the sandblasted needle core surface; 3) Immersing the needle core substrate treated in step 2) in an ethanol suspension containing silver nanoparticles and copper ions, applying a pulsed electric field to direct the adsorption of the nanoparticles on the surface of the needle body substrate; then heating in a vacuum furnace to allow the Ag-Cu nanoparticles to bond to the needle core substrate, thereby forming an Ag-Cu-Ti ternary antibacterial layer on the surface of the needle core substrate; 4) Etching a spiral groove on the surface of the needle core substrate treated in step 3).

2. The acupuncture needle according to claim 1, characterized in that A plurality of mounting through holes are arranged at intervals on the needle tube adjustment portion along the length direction of the needle tube body, and the elastic pin shaft structure is clamped in different mounting through holes so that the arc-surface blunt-mouth structure has different extension distances.

3. The acupuncture needle according to claim 2, characterized in that: At least three mounting through holes are arranged on the needle tube adjusting portion at intervals along the length direction of the needle tube body.

4. The acupuncture needle according to claim 2, characterized in that: The elastic pin structure includes an elastic column and a pressing column connected to the elastic column. The elastic column is fixedly connected to the needle core, and the pressing column is adapted to the mounting through hole on the needle tube.

5. The acupuncture needle according to claim 2, characterized in that: The inner wall of the needle tube is provided with a limiting groove adapted to the elastic pin structure along the length direction.

6. The acupuncture needle according to claim 1, characterized in that A protruding limiting ring is arranged on the outside of the needle tube.

7. The acupuncture needle according to claim 1, characterized in that In step 2) of preparing the composite needle core material, a pulsed laser cladding technique is used to form a composite layer on the sandblasted needle core surface, with a laser power of 700 to 900 W and a scanning speed of 4 to 6 mm / s.

8. The acupuncture needle according to claim 7, characterized in that: In step 2) of preparing the composite needle core material, the thickness of the substrate bonding layer is 20 to 30 μm, and the grain size of the Ni-Ti alloy powder in the substrate bonding layer is ≤100 nm; the thickness of the transition layer is 20 to 30 μm, and the transition layer is a mixture of nano-titanium nitride and Ni-Ti alloy powder in a mass ratio of 1:2 to 4; the thickness of the TiN surface layer is 10 to 15 μm.

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