Acupuncture needle for treating drastic bag

Abstract

The acupuncture needle for treating the drastic bag comprises a needle tube and a needle core, a needle tip part is arranged at one end of the needle tube, an adjusting part is arranged at the other end of the needle tube, and a containing through hole parallel to a needle tube body is formed in the needle tube in the length direction; the needle core penetrates through the containing through hole, the end, corresponding to the needle point portion of the needle tube, of the needle core is arranged to be of an arc face blunt opening structure, the end, close to the adjusting portion of the needle tube, of the needle core is provided with a drawing handle, and the needle core is connected with the adjusting portion of the needle tube through a connecting piece. The drawing handle is pushed to drive the cambered-surface blunt-mouth-shaped structure to extend outwards from the needle point part of the needle tube, and in addition, the needle core is made of a composite needle core material. According to the acupuncture needle for treating the drastic skin, the sweeping length can be flexibly adjusted, the overall bending strength and fracture toughness of the needle core material are greatly improved, and antibacterial ions can be continuously released, so that the treatment pain and risk of a patient with the drastic skin can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of biomedical devices, and particularly relates to an acupuncture needle for treating fat pads on the back of the neck based on composite materials. Background Art

[0002] In the treatment of fat pads on the back of the neck, acupuncture, as a traditional and widely used Chinese medical therapy, plays an important role. Acupuncture stimulates specific acupoints to adjust the qi and blood as well as the meridians of the human body, so as to relieve symptoms related to fat pads on the back of the neck, such as pain, soreness and swelling, and further improve the physical condition of patients. In recent years, as an innovative external treatment method, the floating needle therapy performs a sweeping and dispersing operation in the subcutaneous superficial layer near or distal to the pain site without piercing into the muscle by shallow subcutaneous puncture. By releasing the adhesion of the fascia and promoting local blood circulation, it can quickly relieve muscle tension and pain, and thus has a good therapeutic effect on the treatment of fat pads on the back of the neck. However, for the floating needle therapy currently used for the treatment of fat pads on the back of the neck, the acupuncture needles adopted still have the traditional structure, and there are many drawbacks in the actual application process.

[0003] First of all, the sweeping and dispersing distance cannot be flexibly adjusted. During the acupuncture treatment process, the sweeping and dispersing action is to better stimulate the meridian qi and promote the qi and blood circulation to enhance the treatment effect. There are differences in the size, location, severity of the condition, and individual constitutions of fat pads on the back of the neck among different patients. In theory, it is necessary to be able to flexibly adjust the sweeping and dispersing distance to accurately act on the lesion site. However, in the design of the existing acupuncture needles, the sweeping and dispersing distance is often fixed and cannot be changed according to specific treatment requirements. This results in that when facing various complex and diverse cases of fat pads on the back of the neck, acupuncturists are difficult to perform the most appropriate treatment operations, which may affect the treatment effect and cannot fully meet the diverse clinical treatment needs. For example, for some small and shallow fat pads on the back of the neck, an overly large fixed sweeping and dispersing distance may stimulate unnecessary surrounding tissues and cause discomfort; while for large and deep fat pads on the back of the neck, a too small fixed sweeping and dispersing distance is difficult to fully cover the lesion area, making it difficult to give full play to the therapeutic effect. Therefore, in actual application, multiple acupuncture needles need to be replaced during one treatment, resulting in serious waste of materials, and correspondingly, multiple punctures are required, bringing pain to patients.

[0004] Secondly, the floating needle therapy for the "wealthy bag" requires frequent sweeping, thus posing high requirements for the strength and toughness of acupuncture needles. However, there are certain defects in the materials and manufacturing processes of existing ordinary acupuncture needles. Insufficient strength causes the acupuncture needles to bend or even break easily when encountering relatively tough tissues. Once an acupuncture needle breaks inside the patient's body, it will not only bring great pain to the patient but may also lead to serious medical accidents. At the same time, poor toughness results in the acupuncture needles not being able to well adapt to the complex human tissue environment during routine operations such as sweeping, with a poor operation feel, affecting the operation accuracy and treatment effect of acupuncturists. For example, when acupuncture is performed on the relatively tough muscle or fascia tissues around the "wealthy bag", the acupuncture needles are prone to bending, and acupuncturists have to spend extra effort to adjust the position and angle of the needles, which not only increases the operation difficulty but may also prolong the treatment time and reduce the patient's treatment experience.

[0005] Furthermore, acupuncture treatment requires directly inserting acupuncture needles into the human skin. If the antibacterial performance of acupuncture needles is insufficient, it is extremely likely to cause infection risks during use. In clinical use, the antibacterial performance of ordinary acupuncture needles is poor. Even after routine disinfection, the acupuncture needles may still carry bacteria and other microorganisms, leading to local infections, such as symptoms like redness, swelling, increased pain, and fever at the acupuncture site, affecting the patient's physical health and subsequent treatment process. This risk is more prominent for patients with the "wealthy bag" who have lower immunity or underlying diseases.

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

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

[0008] The technical problem to be further solved by the present invention is to improve the strength and toughness of ordinary acupuncture needles to prevent phenomena such as broken needles and bending during the floating needle therapy for the "wealthy bag".

[0009] The technical problem to be further solved by the present invention is to improve the antibacterial performance of acupuncture needles to prepare an acupuncture needle for treating the "wealthy bag" with excellent comprehensive performance.

[0010] The technical solution of the present invention is as follows: An acupuncture needle for treating a dowager's hump, characterized in that it comprises a needle tube and a needle core; one end of the needle tube is provided with a needle tip part, the other end of the needle tube is provided with an adjusting part, and an accommodating through hole parallel to the tube body of the needle tube is arranged along the length direction inside the needle tube; the needle core passes through the accommodating through hole, one end of the needle core corresponding to the needle tip part of the needle tube is arranged in an arc-shaped blunt mouth structure, a pulling handle is arranged at one end of the needle core close to the adjusting part of the needle tube, and the needle core is connected with the adjusting part of the needle tube through a connecting piece; pushing the pulling handle drives the arc-shaped blunt mouth structure to extend outwards from the needle tip part of the needle tube, and adjusting the connection position between the connecting piece and the adjusting part on the needle tube changes the extension distance of the arc-shaped blunt mouth structure; The sweeping radian of the needle core is 50-70°; The needle core comprises a needle core base material and an Ag-Cu-Ti ternary antibacterial layer arranged on the surface of the needle core base material.

[0011] Furthermore, a plurality of mounting through holes are arranged at intervals along the length direction of the tube body of the needle tube on the adjusting part of the needle tube, the adjusting piece is a elastic pin shaft structure, and the elastic pin shaft structure is clamped in different mounting through holes so that the arc-shaped blunt mouth structure has different extension distances.

[0012] Furthermore, at least 3 mounting through holes are arranged at intervals along the length direction of the tube body of the needle tube on the adjusting part of the needle tube.

[0013] Furthermore, the elastic pin shaft structure comprises an elastic column and a pressing column connected with the elastic column, the elastic column is fixedly connected with the needle core, and the pressing column is adapted to the mounting through hole on the needle tube.

[0014] Furthermore, a limiting groove adapted to the elastic pin shaft structure is arranged along the length direction on the inner wall of the needle tube.

[0015] Furthermore, a protruding limiting ring is arranged outside the needle tube.

[0016] Furthermore, the needle core is prepared from a composite needle core material, and the preparation method of the composite needle core material comprises the following steps: (1) Using a nickel-titanium alloy wire as the needle core base material, and performing sandblasting treatment on the surface of the needle core base material with alumina particles; (2) Under the protection of nitrogen, 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 surface of the needle core after sandblasting treatment; (3) Immersing the needle core base material processed in step (2) into an ethanol suspension containing silver nanoparticles and copper ions, applying a pulsed electric field to enable the nanoparticles to be adsorbed on the surface of the needle body base material directionally; then heating in a vacuum furnace to enable the Ag-Cu nanoparticles to be combined with the needle core matrix, and an Ag-Cu-Ti ternary antibacterial layer is generated on the surface of the needle core matrix; (4) It is only necessary to etch spiral grooves on the surface of the needle core substrate processed in step (3).

[0017] Further, in step (2), the pulse laser cladding technology is adopted to form a composite layer on the surface of the needle core after sandblasting treatment, wherein the laser power is 700 - 900W and the scanning speed is 4 - 6mm / s.

[0018] Further, in step (2), the thickness of the matrix bonding layer is 20 - 30μm, and the grain size of the Ni-Ti alloy powder in the matrix bonding layer is ≤100nm; the thickness of the transition layer is 20 - 30μm, and the transition layer is composed of nano-titanium nitride and Ni-Ti alloy powder mixed in a mass ratio of 1:2 - 4; the thickness of the TiN surface layer is 10 - 15μm.

[0019] Beneficial effects: The acupuncture needle for treating the fat pad adopts the combination of the needle core and the needle tube. After the needle tube pierces the skin, the needle core can further adjust the extended length according to the required length of the sweeping and scattering, and can be flexibly adjusted according to the situation during the treatment of the fat pad, so there is no need to frequently replace the acupuncture needle and frequently pierce, greatly saving the material consumption and reducing the infection risk brought by frequent piercing. In addition, the end of the needle core is set into an arc-shaped blunt mouth structure, which can loosen the fascia adhesion, promote local blood circulation, quickly relieve muscle tension and pain, while greatly reducing the risk of stabbing and bleeding of subcutaneous blood vessels and relieving the pain sensation, greatly reducing the treatment pain and risk of patients.

[0020] The acupuncture needle for treating the fat pad of the present invention is prepared by using a composite needle core material. Compared with ordinary acupuncture needles, its overall bending strength and fracture toughness are greatly improved, and it can release antibacterial ions for a long time, and the antibacterial rate against Staphylococcus aureus is >99.5% within 72h. Therefore, the acupuncture needle for treating the fat pad of the present invention has good strength and toughness, and at the same time has good antibacterial properties, and the comprehensive performance is excellent. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the acupuncture needle in Embodiment 1 of the present invention.

[0022] Figure 2 It is a schematic connection structure diagram of the needle core and the needle tube in Embodiment 1 of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the limiting groove on the inner wall of the needle tube in Embodiment 1 of the present invention.

[0024] Figure 4 It is a schematic structural diagram of the needle core extending from the tip of the needle tube in Embodiment 1 of the present invention.

[0025] Wherein: 1. Syringe tube; 11. Adjusting part; 111. Mounting through-hole; 112. Limiting groove; 12. Needle tip part; 13. Tube mouth part; 14. Limiting ring; 15. Accommodating through-hole; 2. Needle core; 21. Connecting piece; 211. Elastic column; 212. Pressing column; 22. Arc-shaped blunt end structure; 23. Pulling handle. Detailed implementation mode

[0026] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further elaborated below in conjunction with specific embodiments.

[0027] Embodiment 1

[0028] An acupuncture needle for treating "rich neck", as Figure 1 shown, includes a syringe tube 1 and a needle core 2; a needle tip part 12 is arranged at one end of the syringe tube 1, and the needle tip part 12 is used for quickly piercing under the skin. An adjusting part 11 is arranged at the other end of the syringe tube 1, and an accommodating through-hole 15 parallel to the tube body of the syringe tube 1 is arranged in the syringe tube 1 along the length direction.

[0029] 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. One end of the needle core 2 corresponding to the needle tip part 12 of the syringe tube 1 is arranged as an arc-shaped blunt end structure 22, preferably a hemispherical structure or a spherical structure. Thus, when performing large-area sweeping under the skin during the treatment of "rich neck", it can loosen the fascia adhesion, promote local blood circulation, quickly relieve muscle tension and pain. At the same time, it greatly reduces the risk of stabbing and bleeding of subcutaneous blood vessels and relieves the pain sensation, greatly reducing the treatment pain and risk of patients.

[0030] One end of the needle core 2 close to the adjusting part 11 of the syringe tube 1 is provided with a pulling handle 23, and the needle core 2 is connected to the adjusting part 11 of the syringe tube 1 through a connecting piece 21; by pulling the pulling handle 23 to pull the needle core 2, the arc-shaped blunt end structure 22 of the needle core 2 is pushed to extend outwards from the needle tip part 12 of the syringe tube 1, and the connection position between the connecting piece 21 and the adjusting part 11 on the syringe tube 1 is adjusted to change the extension distance of the arc-shaped blunt end structure 22.

[0031] Specifically, as Figure 1 shown, a plurality of mounting through-holes 111 are arranged at intervals along the length direction of the tube body of the adjusting part 11 of the syringe tube 1. In this embodiment, preferably at least three, so as to perform at least three-level adjustment. The adjusting part is an elastic pin shaft structure, as Figure 2As shown, the elastic pin shaft structure is clamped in different mounting through holes 111, so that the arc-shaped blunt end structure 22 has different extension distances. The elastic pin shaft 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 through hole 111 on the needle tube 1. Thus, in practical applications, by pressing the pressing column 212, the whole elastic pin shaft structure can be contracted inward, and then the needle core 2 is pushed by the push-pull handle. When it is pushed to the next adjacent mounting through hole 111, the pressing column 212 elastically deforms and pops out to be clamped in the corresponding mounting through hole 111, thereby completing the adjustment of different sweeping distances.

[0032] As Figure 3 shown, a limiting groove 112 adapted to the elastic pin shaft structure is arranged along the length direction on the inner wall of the needle tube 1. Thus, during the pushing process of the needle core 2, the elastic pin shaft structure slides along the limiting groove 112, and the adjustment process is smooth and accurate. In some improved embodiments, a plurality of reinforcing columns are circumferentially and spacedly arranged on the surface of the needle core 2 around the elastic pin shaft structure; a second limiting groove 112 adapted to the reinforcing columns is arranged along the length direction on the inner wall of the needle tube 1, thereby further improving the smoothness and accuracy of the sliding of the elastic pin shaft structure during the pushing process of the needle core 2.

[0033] In the present invention, a protruding limiting ring 14 is arranged outside the needle tube 1. It is used to control the depth of the tip 12 of the needle tube 1 piercing into the skin. After piercing into the skin, the sweeping distance is further controlled by the pushing of the needle core 2 and the extension of the arc-shaped blunt end structure 22. During the sweeping process, the sweeping distance can be flexibly adjusted. In the present invention, after the needle tube 1 pierces into the skin and the sweeping distance is determined, the needle core 2 is used to move the needle, and the sweeping arc of the needle core 2 is 50° - 70°, preferably 60°.

[0034] Embodiment 2

[0035] On the basis of Embodiment 1, this embodiment is further improved. The needle core is prepared from a composite needle core material, and the preparation method of the composite needle core material includes the following steps: (1) Using a nickel-titanium alloy wire as the needle core substrate, the thickness of the needle core substrate is 3.5 cm. The needle core substrate is subjected to stress relief annealing treatment under vacuum conditions, and then sandblasted with 120-mesh alumina particles on the surface of the needle core substrate, so as to form a micron-level roughness on the surface of the needle core substrate. The Ra value of the surface of the treated needle core substrate is about 1.8 μm, thereby enhancing the subsequent coating adhesion.

[0036] (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 surface of the sandblasted needle core; Specifically, the pulse laser cladding technology is adopted to form a composite layer on the surface of the needle core after sandblasting treatment. The laser power is 800 W, and the scanning speed is 5 mm / s. The thickness of the matrix bonding layer is 25 μm, and the grain size of the Ni-Ti alloy powder in the matrix bonding layer is ≤100 nm; the thickness of the transition layer is 20 μm, and the transition layer is composed of nano titanium nitride and Ni-Ti alloy powder mixed according to a mass ratio of 1:3; the thickness of the TiN surface layer is 12 μm.

[0037] (3) Immerse the needle core substrate processed in step (2) into an ethanol suspension containing silver nanoparticles and copper ions. The molar ratio of Ag to Cu in the suspension is 3:1; apply a pulsed electric field with a voltage of 50 V and a frequency of 100 Hz to enable the nano-particles to be adsorbed on the surface of the needle substrate in a directional manner; then heat it to 400 °C in a vacuum furnace and maintain it for 30 min to bond the Ag-Cu nanoparticles to the needle core matrix, and a ternary antibacterial layer of Ag-Cu-Ti is formed on the surface of the needle core matrix. (4) Adopt femtosecond laser microfabrication to etch spiral grooves on the surface of the needle core substrate processed in step (3). The groove width is 50 μm, the depth is 10 μm, and the helix is 45°. This operation can reduce the puncture resistance by more than 40% compared with a smooth surface, and at the same time enhance the tissue adhesion effect during sweeping and scattering.

[0038] Example 3

[0039] This example is further improved on the basis of Example 1. 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) Use a nickel-titanium alloy wire as the needle core substrate. The thickness of the needle core substrate is 3.5 cm. The needle core substrate is subjected to stress relief annealing treatment under vacuum conditions, and then sandblasted with 120-mesh alumina particles on the surface of the needle core substrate to form a micron-level roughness on the surface of the needle core substrate. The Ra value of the processed needle core substrate surface is about 1.8 μm, thereby enhancing the subsequent coating bonding force.

[0040] (2) Under nitrogen protection, a nano-crystalline 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 surface of the needle core after sandblasting treatment. Specifically, the pulse laser cladding technology is adopted to form a composite layer on the surface of the needle core after sandblasting treatment. The laser power is 900 W, and the scanning speed is 6 mm / s. The thickness of the matrix bonding layer is 30 μm, and the grain size of the Ni-Ti alloy powder in the matrix bonding layer is ≤100 nm; the thickness of the transition layer is 20 μm, and the transition layer is composed of nano titanium nitride and Ni-Ti alloy powder mixed according to a mass ratio of 1:4; the thickness of the TiN surface layer is 15 μm.

[0041] (3) Immerse the needle core substrate processed in step (2) into an ethanol suspension containing silver nanoparticles and copper ions. The molar ratio of Ag to Cu in the suspension is 4:1. Apply a pulsed electric field with a voltage of 50 V and a frequency of 100 Hz to enable the directional adsorption of nanoparticles on the surface of the needle substrate. Then heat it in a vacuum furnace to 420 °C and maintain for 28 min to bond the Ag-Cu nanoparticles with the needle core matrix, and form an Ag-Cu-Ti ternary antibacterial layer on the surface of the needle core matrix; (4) Use femtosecond laser micromachining to etch spiral grooves on the surface of the needle core substrate processed in step (3). The groove width is 50 μm, the depth is 10 μm, and the helix is 45°.

[0042] Comparative Example 1 In this comparative example, the needle core is prepared from a composite needle core material. The preparation method of the composite needle core material includes the following steps: (1) Use a nickel-titanium alloy wire as the needle core substrate. The thickness of the needle core substrate is 3.5 cm. The needle core substrate is subjected to stress relief annealing treatment under vacuum conditions.

[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 surface of the needle core after sandblasting treatment; Specifically, use pulsed laser cladding technology to form a composite layer on the surface of the needle core after sandblasting treatment. The laser power is 800 W, and the scanning speed is 5 mm / s. The thickness of the matrix bonding layer is 25 μm, and the grain size of the Ni-Ti alloy powder in the matrix bonding layer is ≤100 nm; the thickness of the transition layer is 20 μm, and the transition layer is composed of nanocrystalline titanium nitride and Ni-Ti alloy powder mixed in a mass ratio of 1:3; the thickness of the TiN surface layer is 12 μm.

[0044] (3) Immerse the needle core substrate processed in step (2) into an ethanol suspension containing silver nanoparticles and copper ions. The molar ratio of Ag to Cu in the suspension is 3:1. Apply a pulsed electric field with a voltage of 50 V and a frequency of 100 Hz to enable the directional adsorption of nanoparticles on the surface of the needle substrate. Then heat it in a vacuum furnace to 400 °C and maintain for 30 min to bond the Ag-Cu nanoparticles with the needle core matrix, and form an Ag-Cu-Ti ternary antibacterial layer on the surface of the needle core matrix; (4) Use femtosecond laser micromachining to etch spiral grooves on the surface of the needle core substrate processed in step (3). The groove width is 50 μm, the depth is 10 μm, and the helix is 45°. This operation can reduce the puncture resistance by more than 40% compared to a smooth surface, and at the same time enhance the tissue adhesion effect during sweeping and scattering.

[0045] Comparative Example 2 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: (1) Using a nickel-titanium alloy wire as the needle core substrate, the thickness of the needle core substrate is 3.5 cm. The needle core substrate is subjected to stress relief annealing under vacuum conditions, and then sandblasted with 120-mesh alumina particles on the surface of the needle core substrate, so as to form a micron-level roughness on the surface of the needle core substrate. The Ra value of the surface of the treated needle core substrate is about 1.8 μm, which can enhance the subsequent coating adhesion.

[0046] (2) Under nitrogen protection, a high-hardness TiN surface layer is formed on the sandblasted needle core surface; specifically, the pulsed laser cladding technology is used to form a high-hardness TiN surface 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 TiN surface layer is 12 μm.

[0047] (3) Immerse the needle core substrate treated in step (2) into an ethanol suspension containing silver nanoparticles and copper ions. The molar ratio of Ag to Cu in the suspension is 3:1; apply a pulsed electric field with a voltage of 50 V and a frequency of 100 Hz to make the nanoparticles adsorb on the surface of the needle substrate directionally; then heat it to 400 °C in a vacuum furnace and maintain it for 30 min to make the Ag-Cu nanoparticles combine with the needle core matrix, and an Ag-Cu-Ti ternary antibacterial layer is formed on the surface of the needle core matrix; (4) Use femtosecond laser micromachining to etch spiral grooves on the surface of the needle core substrate treated in step (3), with a groove width of 50 μm, a depth of 10 μm, and a helix of 45°. This operation can reduce the puncture resistance by more than 40% compared with a smooth surface, and at the same time enhance the tissue adhesion effect during sweeping and dispersing.

[0048] Comparative Example 3 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: (1) Using a nickel-titanium alloy wire as the needle core substrate, the thickness of the needle core substrate is 3.5 cm. The needle core substrate is subjected to stress relief annealing under vacuum conditions, and then sandblasted with 120-mesh alumina particles on the surface of the needle core substrate, so as to form a micron-level roughness on the surface of the needle core substrate. The Ra value of the surface of the treated needle core substrate is about 1.8 μm, which can enhance the subsequent coating adhesion.

[0049] (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; Specifically, the pulse laser cladding technology is adopted to form a composite layer on the surface of the needle core after sandblasting treatment. The laser power is 800 W, and the scanning speed is 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 composed of nano titanium nitride and Ni-Ti alloy powder mixed in a mass ratio of 1:3; the thickness of the TiN surface layer is 12 μm.

[0050] (3) Coat the surface of the needle core substrate processed in step (2) with an antibacterial coating containing silver nanoparticles; (4) Use femtosecond laser micromachining to etch spiral grooves on the surface of the needle core substrate processed in step (3). The groove width is 50 μm, the depth is 10 μm, and the helix is 45°. This operation can reduce the puncture resistance by more than 40% compared with a smooth surface, and at the same time enhance the tissue adhesion effect during sweeping and scattering.

[0051] Control Example 4

[0052] Implement ordinary stainless steel 316 acupuncture needles.

[0053] Perform performance tests on the acupuncture needles described in Examples 2-3 and Control Examples 1-4.

[0054] Among them, the bending strength refers to ISO 7438 "Metallic materials - Bend test", and the fracture toughness test refers to the miniaturized compact tension (CT) specimen method in ASTM E399 "Standard test method for plane-strain fracture toughness of metallic materials". The antibacterial performance is tested by in vitro bacterial co-culture for 24 h and 72 h, referring to the ISO 22196 standard quantitative suspension method. The results are shown in Table 1.

[0055]

[0056] As can be seen from Table 1, the composite needle core prepared in this application has good comprehensive performance in terms of bending resistance, toughness and antibacterial properties, far superior to traditional stainless steel acupuncture needles. It can effectively prevent the traditional acupuncture needles from breaking and bending due to poor toughness and being unable to adapt to the complex human tissue environment during the treatment of the rich neck mass, greatly reducing the risk for acupuncturists during the treatment of the rich neck mass, and improving the operation convenience and accuracy. In addition, this application also has good long-term antibacterial properties. By continuously releasing antibacterial ions, the antibacterial property against Staphylococcus aureus is higher than 99.9%, thus better reducing the infection risk. From each control example, it can be seen that the process of this application is integral, the control of each process step and parameter is extremely critical, and there is a synergistic effect between each step. As can be seen from Control Example 3, when the composite layer formed by the pulse laser cladding technology is not properly controlled, it also has an adverse effect on the antibacterial rate of the obtained needle core material.

[0057] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An acupuncture needle for treating a dowager's hump, characterized in that, It includes a needle tube and a needle core; one end of the needle tube is provided with a needle tip part, the other end of the needle tube is provided with an adjusting part, and an accommodation through hole parallel to the needle tube body is arranged along the length direction inside the needle tube; the needle core passes through the accommodation through hole, one end of the needle core corresponding to the needle tip part of the needle tube is set into an arc-shaped blunt mouth structure, a pulling handle is arranged at one end of the needle core close to the adjusting part of the needle tube, and the needle core is connected to the adjusting part of the needle tube through a connecting piece; pushing the pulling handle drives the arc-shaped blunt mouth structure to extend outward from the needle tip part of the needle tube, and adjusting the connection position between the connecting piece and the adjusting part on the needle tube changes the extension distance of the arc-shaped blunt mouth structure. The sweeping arc of the needle core is 50~70°. The needle core includes a needle core substrate and an Ag-Cu-Ti ternary antibacterial layer provided on the surface of the needle core substrate.

2. The acupuncture needle for treating dowager's hump according to claim 1, wherein, A plurality of installation through holes are arranged at intervals along the length direction of the needle tube body on the needle tube adjusting part, the adjusting piece is an elastic pin shaft structure, and the elastic pin shaft structure is clamped in different installation through holes so that the arc-shaped blunt mouth structure has different extension distances.

3. The acupuncture needle for treating the rich neck mass according to claim 2, wherein, At least 3 installation through holes are arranged at intervals along the length direction of the needle tube body on the needle tube adjusting part.

4. The acupuncture needle for treating the "wealthy bag" according to claim 2, wherein The elastic pin shaft 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 installation through hole on the needle tube.

5. The acupuncture needle for treating the buffalo hump according to claim 2, wherein, A limiting groove adapted to the elastic pin shaft structure is arranged along the length direction on the inner wall of the needle tube.

6. The acupuncture needle for treating the "wealthy pack" according to claim 1, characterized in that, A protruding limiting ring is arranged outside the needle tube.

7. The acupuncture needle for treating the buffalo hump according to claim 1, wherein, The needle core is prepared from a composite needle core material, and the preparation method of the composite needle core material includes the following steps: (1) Using a nickel-titanium alloy wire as the needle core substrate, and performing sandblasting treatment on the surface of the needle core substrate with alumina 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 surface of the sandblasted needle core. (3) Immersing the needle core substrate processed in step (2) into an ethanol suspension containing silver nanoparticles and copper ions, applying a pulsed electric field to make the nanoparticles adsorb on the surface of the needle body substrate directionally; then heating in a vacuum furnace to bond the Ag-Cu nanoparticles with the needle core matrix, and an Ag-Cu-Ti ternary antibacterial layer is generated on the surface of the needle core matrix. (4) Etching spiral grooves on the surface of the needle core substrate processed in step (3) can be done.

8. The acupuncture needle for treating the buffalo hump according to claim 7, wherein, In step (2), a pulsed laser cladding technique is used to form a composite layer on the surface of the sandblasted needle core, the laser power is 700~900W, and the scanning speed is 4~6mm / s.

9. The acupuncture needle for treating the buffalo hump according to claim 8, wherein, In step (2), the thickness of the matrix bonding layer is 20~30μm, the grain size of the Ni-Ti alloy powder in the matrix bonding layer ≤100nm; the thickness of the transition layer is 20~30μm, and the transition layer is composed of nano-titanium nitride and Ni-Ti alloy powder mixed in a mass ratio of 1:2~4; the thickness of the TiN surface layer is 10~15μm.

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