An acupuncture needle insertion assisting device

Abstract

The application discloses an acupuncture needle insertion assisting device, and belongs to the field of medical instruments. The device comprises an ejection assembly, a guide tube, a sleeve, a support and a locking bolt. The ejection assembly drives a hammer to slide along the axial direction through an elastic member. The hammer switches between a compression position and a firing position. The hammer hits the handle of an acupuncture needle to make the handle pass through an elastic sheet in the guide tube and be ejected. The sleeve is sleeved outside the guide tube and can move axially. A baffle at the end of the sleeve limits the depth of the needle body through an opening. The support is rotationally connected with the guide tube through a connecting shaft. The locking bolt passes through a limiting groove of the support and abuts against the outer wall of the sleeve to lock the included angle between the guide tube and the support. The device realizes rapid needle insertion through ejection driving, continuously adjusts the penetration depth through axial movement of the sleeve, and locks the needle insertion angle through cooperation of the support and the locking bolt. The device solves the problem of insufficient control precision of the traditional needle insertion depth and angle, and improves the safety and operability of needle insertion.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an acupuncture acupuncture assist device. Background Technology

[0002] As an invasive physical therapy method, the clinical efficacy of acupuncture is directly related to the geometric precision of the needling operation, mainly reflected in the control of the insertion angle and depth. In clinical practice, different acupoints have different requirements for the insertion angle. For example, facial acupoints are mostly needled horizontally at about 15°, while the limbs and trunk are often needled perpendicularly at 90° or obliquely at 45°. Deviations in needle depth can directly affect the sensation of Qi or cause organ damage. It is evident that the efficient use of acupuncture devices is inseparable from their ability to adjust the angle and depth.

[0003] In existing technologies, research and development directions for acupuncture auxiliary devices include efforts to mechanize the needle insertion process. For example, invention patent CN121910600A discloses a catapult acupuncture device, which uses an elastic energy storage component inside a capsule-shaped shell and a multi-level annular groove and protrusion engagement structure between the cover and the shell to achieve energy storage and position fixation before firing. Although this device can ensure the sterility of the needle and achieve automatic retraction through a sealing membrane, the locking engagement between the cover and the shell can only provide a limited number of discrete depth settings, and cannot be continuously fine-tuned according to the actual anatomical needs of the acupoint. This results in the inability to meet the clinical requirements for adjustment accuracy when dealing with acupoints requiring precise depth control, such as 0.5 cun or 0.8 cun. In addition, this existing technology does not include an angle adjustment mechanism, and the needle insertion angle depends entirely on the operator's hand position on the shell, lacking quantitative standards.

[0004] Research and development also includes auxiliary positioning for needle insertion angle. For example, utility model patent CN213099410U discloses an auxiliary device for controlling the needle insertion angle. Angle adjustment is achieved through the rotational connection between a positioning plate and the needle tube, and scale lines are set on the positioning plate to read the angle value. However, its depth control relies on the operator manually pushing the needle to its relative position within the needle tube. This open adjustment method lacks a clear axial reference and cannot maintain depth stability during firing. Furthermore, it lacks an independent ejection drive source, still requiring manual pressing of the pressure head to provide insertion power, making it difficult to maintain uniform needle insertion force. In addition, its angle adjustment mechanism lacks a locking structure; when manually pressing the needle, the needle tube is easily deflected due to force, causing a deviation between the actual insertion angle and the preset angle. Summary of the Invention

[0005] To simultaneously overcome the problems of continuous adjustment of puncture depth and quantitative locking of puncture angle mentioned in the prior art, this invention proposes an acupuncture application auxiliary device: it is equipped with a depth limiting component and an angle adjustment component. In the threaded depth limiting component, the sleeve engages with the external thread of the guide tube through the internal thread; rotating the sleeve can continuously adjust the axial position of the baffle, precisely controlling the needle insertion depth. In the arc-shaped locking angle adjustment component, the guide tube is rotatably connected to a graduated support through a radial connecting shaft; the set bolt slides along the arc groove and abuts against the outer wall of the sleeve, locking the angle between the guide tube and the support. This device specifically includes: The ejection assembly includes a firing chamber, an elastic element, and a hammer, wherein the hammer is disposed within the firing chamber and is capable of sliding linearly along the axial direction under the drive of the elastic element; A guide tube is coaxially fixed to the side of the firing chamber facing the human body. An elastic sheet is disposed inside the guide tube, and an axially oriented through-hole is formed within the through-hole. The inner diameter of the through-hole is smaller than the outer diameter of the acupuncture needle handle but larger than the outer diameter of the needle body. The elastic sheet is made of biocompatible polyurethane, silicone rubber, or other elastic materials and is pre-tightly fixed to the inner wall of the guide tube. The use of medical-grade elastic materials ensures safe use and avoids potential contamination from contact between internal components and the needle.

[0006] A sleeve is coaxially fitted on the outside of the guide tube and can move axially relative to the guide tube. A baffle is fixed at the end of the sleeve, and an opening is provided on the baffle for the needle body to pass through. Along the axial direction of the guide tube, the opening is aligned with the through hole. The guide tube and the sleeve form a depth limiting assembly. The guide tube is rotatably connected to the support via a connecting shaft. The set bolt has a limiting groove on the support. When the set bolt passes through the limiting groove and abuts against the outer wall of the sleeve, it locks the included angle between the guide tube and the support. The support and the set bolt together form an angle adjustment assembly.

[0007] When the elastic element is compressed and stores energy, it pulls the hammer to a compressed position, and the firing part of the hammer is located at the end of the guide tube away from the human body. When the hammer is released from the compressed position and moves to a firing position, the firing part strikes the handle, causing the handle to squeeze and pass through the through hole of the elastic sheet and finally be intercepted by the opening.

[0008] Furthermore, the hammer includes a driven part and a firing part along the axial direction. The cross-sectional profile of the driven part is adapted to the cross-sectional profile of the inner wall of the firing chamber to restrict the hammer to slide only axially within the firing chamber. The inner diameter of the guide tube is smaller than the inner diameter of the firing chamber, and the cross-sectional profile of the firing part is adapted to the cross-sectional profile of the inner wall of the guide tube, so that when the hammer is in the firing position, the firing part extends into the guide tube and strikes the handle. Hammer wobbling can lead to a decrease in firing accuracy. By setting a firing chamber adapted to the profile of the driven part and an inner wall of the guide tube adapted to the profile of the firing part, the movement of the hammer is restricted to axial sliding only, thereby ensuring firing accuracy and achieving stability of the ejection drive.

[0009] Furthermore, the guide tube has a needle insertion notch on its wall, the size of which allows the handle to pass through and be inserted into the guide tube.

[0010] Furthermore, a radially penetrating slot is provided on the tube wall of the guide tube and the sleeve, the width of which allows the handle to disengage radially; an elastic baffle is embedded in the slot, which partially covers the slot in its natural state to prevent the handle from disengaging.

[0011] Furthermore, a ring is rotatably connected to the end of the sleeve that is axially away from the human body. The inner wall of the ring is provided with an internal thread, and the outer wall of the guide tube is provided with an external thread. When the sleeve rotates around the guide tube, the engagement of the internal thread and the external thread drives the sleeve to move axially, thereby adjusting the distance of the baffle relative to the end of the guide tube.

[0012] Furthermore, a traction member is provided at the top of the firing chamber. The traction member passes through the top wall of the firing chamber and is connected to the hammer. When the traction member is pulled by an external force, it drives the hammer to move from the firing position to the compression position and maintains the position to lock the energy storage state of the elastic element.

[0013] Furthermore, one exposed end of the traction member is connected to a power device configured to provide automated traction force to replace manual operation and automate the acupuncture needle ejection process. Alternatively, the traction member has an exposed traction end that slides along the axial direction of the guide tube on the outside of the guide tube. The traction end is specifically constructed as a single piece, which, as it approaches the human body surface along the axial direction of the guide tube, pulls the hammer towards the compression position. When the traction end is released, the hammer, pushed by the elastic element, strikes the acupuncture needle's handle at the firing position.

[0014] Furthermore, the support includes a base plate and an arc-shaped arm with an angle scale, the two ends of the connecting shaft are respectively connected to the arc-shaped arm, and the limiting groove is provided on the arc-shaped arm.

[0015] Furthermore, the set bolt is threadedly connected to a nut, and a slider is fixed to one side of the nut. The slider slides against the edge of the arc-shaped arm. During assembly, the set bolt passes sequentially through the slider, the limiting groove, and the nut, restricting the nut to slide only along the arc-shaped edge of the arc-shaped arm. During the rotation of the guide tube around the connecting shaft, when the set bolt moves to the corresponding position along the limiting groove, the set bolt always faces the central axis of the guide tube. The slider forces the bolt to slide along the arc-shaped trajectory, ensuring the locking force is aligned with the sleeve and preventing the bolt from slipping during locking, which would cause the set bolt's orientation to shift.

[0016] Furthermore, it also includes an elastic reset component connected between the arc-shaped arm and the sleeve. When the guide tube is perpendicular to the base plate, the elastic reset component is in its natural state. When the sleeve rotates around the connecting shaft, it stretches the elastic reset component. When the set bolt is released, the elastic reset component drives the sleeve to reset. The elastic reset component automatically drives the assembly back to its initial position, improving operational efficiency and solving the problem of manual reset after each use.

[0017] Furthermore, the baffle at the end of the sleeve is annular, and the opening is a circular hole located at the center of the annular baffle. The diameter of the circular hole is larger than the diameter of the needle body but smaller than the diameter of the handle, so as to limit the length of the needle body extending beyond the end of the guide tube when the hammer strikes the handle. More specifically, the baffle includes at least two strip structures symmetrically arranged around the central axis of the guide tube, with the circular hole located between the two strip structures. The guide tube has a guide groove along its central axis towards its end facing the human body. The strip structures are adapted to the guide groove, so that the sleeve and the guide tube do not rotate circumferentially during relative sliding, thus avoiding mechanical interference between the movement of the sleeve and the movement of the elastic reset member.

[0018] Furthermore, after one acupuncture treatment, by radially translating the guide tube, the handle overcomes the resistance of the elastic baffle and radially disengages from the slot, thereby leaving the acupuncture needle on the patient's body surface, while the needle ejector body separates from the acupuncture needle. This clarifies the action of translating the guide tube and achieves non-destructive separation of the device and the needle.

[0019] The beneficial effects of this invention are: 1. This invention discloses a threaded engagement structure between a sleeve and a guide tube. The engagement of the inner thread of the sleeve's inner wall with the outer thread of the guide tube's outer wall converts rotational motion into axial displacement, allowing the baffle at the end of the sleeve to steplessly change its distance relative to the end of the guide tube. Compared to the discrete locking positions in the prior art, this allows for precise quantification of the length of the acupuncture needle puncture portion protruding from the baffle.

[0020] 2. This invention discloses a mating structure of a support, a connecting shaft, and a set bolt. The arc-shaped limiting groove guides the set bolt to press against the outer wall of the sleeve, thus fixing the angle between the guide tube and the patient's body surface. The slider's sliding along the edge of the arc-shaped arm prevents radial displacement of the sleeve during locking, effectively avoiding angular deflection caused by needle application pressure. This better addresses the problem of poor therapeutic efficacy or safety hazards due to angle instability during needle application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 A perspective view of an assembly structure of the present invention with the hammer in the firing position; Figure 2 for Figure 1 A magnified view of the structure at point A in the middle; Figure 3 This is a front view of an assembly structure according to the present invention; Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure along the BB direction; Figure 5 for Figure 3 A schematic diagram of the cross-sectional structure along the CC direction; Figure 6 for Figure 5 A magnified view of the structure at point D in the middle; Figure 7 This is a right view of an assembly structure according to the present invention; Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure along the EE direction; Figure 9 for Figure 8 A magnified view of the structure at point F in the middle; Figure 10 for Figure 8 A magnified view of the local structure at point G; Figure 11 for Figure 8 A magnified view of the structure at point H in the middle; In the diagram, 11. Firing chamber; 12. Elastic element; 13. Hammer; 131. Driven part; 132. Firing part; 14. Traction element; 141. Traction end; 2. Guide tube; 21. Elastic plate; 211. Through hole; 22. Needle loading notch; 23. Groove; 231. Baffle; 24. External thread; 3. Sleeve; 31. Baffle; 311. Opening; 32. Collar; 321. Internal thread; 4. Support; 41. Base plate; 42. Arc arm; 421. Connecting shaft; 422. Elastic reset element; 423. Scale mark; 43. Slider; 431. Nut; 5. Set bolt; 51. Limiting groove; 61. Handle; 62. Needle body. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention are clearly and completely described below through specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] An acupuncture needle application aid device, such as Figure 1-11 As shown, it includes: a catapult assembly, including a firing chamber 11, an elastic element 12, and a hammer 13. The hammer 13 is disposed in the firing chamber 11 and can slide linearly along the axial direction under the drive of the elastic element 12. The elastic element 12 is a 304 stainless steel conical helical spring, with its large-diameter end abutting the top of the firing chamber 11 and its small-diameter end connected to the hammer 13 through a hook structure. The hammer 13 includes a driven part 131 and a firing part 132 along the axial direction. The driven part 131 has a circular cross-section and cooperates with a circular hole in the inner wall of the firing chamber 11. The firing part 132 has a square cross-section and is clearance-fitted with a square hole in the inner wall of the guide tube 2.

[0024] The guide tube 2 is coaxially fixed to the side of the firing chamber 11 facing the human body. An elastic sheet 21 is installed inside the guide tube 2, with an axially oriented through-hole 211. The inner diameter of the through-hole 211 is smaller than the outer diameter of the acupuncture needle handle 61 but larger than the outer diameter of the needle body 62. The elastic sheet 21 is made of biocompatible polyurethane, silicone rubber, or other elastic materials and is pre-tightly fixed to the inner wall of the guide tube 2. The use of medical-grade elastic materials ensures safe use and avoids potential contamination from contact between internal components and the needle.

[0025] Sleeve 3 is coaxially fitted on the outside of guide tube 2 and can move axially relative to guide tube 2. A baffle 31 is fixed at the end of sleeve 3. The baffle 31 has an opening 311 for needle body 62 to pass through. Along the axial direction of guide tube 2, opening 311 is aligned with through hole 211. Guide tube 2 and sleeve 3 form a depth limiting assembly. A collar 32 is rotatably connected to the end of sleeve 3 away from the human body. The inner wall of collar 32 has an internal thread 321 with a pitch of 0.5mm. The outer wall of guide tube 2 has an external thread 24. Sleeve 3 moves axially by 0.5mm for each rotation. The baffle 31 is connected to the end of sleeve 3 through a snap-fit ​​structure. Baffles 31 with different hole diameters can be replaced.

[0026] Support 4 and guide tube 2 are rotatably connected to support 4 via a connecting shaft 421. Support 4 includes an arc-shaped base plate 41 conforming to the curvature of the human body and an arc-shaped arm 42 with angle scales. The two ends of the connecting shaft 421 are respectively connected to the arc-shaped arm 42, and a limiting groove 51 is provided on the arc-shaped arm 42. By setting the base plate 41 and the arc-shaped arm 42, it is helpful to establish a clear rotation reference and reading interface. The arc scale mark 423 is set on the outside of the arc-shaped arm 42, with an angle value range of 0°-90° and a scale range of 0°-90°, with each division representing 5°. Along the axial direction of the set bolt 5, when the sleeve is perpendicular to the base plate 41, the central axis of the sleeve is aligned with the 90° reading of the arc scale mark 423.

[0027] The set bolt 5 has a limiting groove 51 on the support 4. When the set bolt 5 passes through the limiting groove 51 and abuts against the outer wall of the sleeve 3, it locks the included angle between the guide tube 2 and the support 4. The end of the set bolt 5 is a rubber pressure head, corresponding to the mesh pattern on the outer wall of the sleeve 3; or it is a toothed metal head, corresponding to the annular toothed groove on the outer wall of the sleeve 3. The support 4 and the set bolt 5 work together to form an angle adjustment assembly.

[0028] When the elastic element 12 is compressed and stores energy, the traction hammer 13 moves to a compressed position, and the firing part 132 of the hammer 13 is located at the end of the guide tube 2 away from the human body; when the hammer 13 is released from the compressed position and moves to a firing position, the firing part 132 strikes the handle 61, causing the handle 61 to squeeze and pass through the through hole 211 of the elastic sheet 21 and finally be intercepted by the opening 311.

[0029] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 1 , 3As shown in Figures 4 and 8, the hammer 13 includes a driven part 131 and a firing part 132 along the axial direction. The cross-sectional profile of the driven part 131 is adapted to the cross-sectional profile of the inner wall of the firing chamber 11 to limit the hammer 13 to only slide axially within the firing chamber 11. The inner diameter of the guide tube 2 is smaller than the inner diameter of the firing chamber 11, and the cross-sectional profile of the firing part 132 is adapted to the cross-sectional profile of the inner wall of the guide tube 2, so that when the hammer 13 is in the firing position, the firing part 132 extends into the guide tube 2 and strikes the handle 61. The wobbling of the hammer 13's movement will cause a decrease in firing accuracy. By setting the firing chamber 11 to match the profile of the driven part 131 and the inner wall of the guide tube 2 to match the profile of the firing part 132, the movement of the hammer 13 is limited to only axial sliding, thereby ensuring firing accuracy and achieving stability of the ejection drive.

[0030] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 1 , 2 As shown in Figures 4 and 8, a needle loading notch 22 is provided on the wall of the guide tube 2. The size of the needle loading notch 22 allows the handle 61 to pass through and be inserted into the guide tube 2. To ensure that the needle is quickly and accurately loaded into the guide tube 2, the needle loading notch 22 is located above the elastic plate 21. After the handle 61 is inserted, it is blocked by the elastic plate 21, and its upper end is lower than the lower surface of the firing position of the hammer 13. To ensure that the needle is quickly and accurately loaded into the guide tube 2, a notch with a length greater than that of the acupuncture needle is provided radially on the wall of the guide tube 2; or, a long, straight or curved connecting channel is provided between the outer and inner walls of the guide tube 2, and the inner diameter of the connecting channel is greater than the outer diameter of the handle 61. The opening 311 of the connecting channel on the outer wall of the guide tube 2 is the needle loading notch 22. The setting of the needle loading notch 22 provides a dedicated needle loading channel and simplifies the operation process.

[0031] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 2 , 4 As shown in Figures 8 and 9, radially penetrating slots 23 are formed on the walls of the guide tube 2 and sleeve 3. The width of the slots 23 allows the handle 61 to disengage radially. An elastic baffle 231 is embedded in the slots 23. In their natural state, the baffles 231 on both sides cover 1 / 3 to 1 / 2 of the width of the slots 23 respectively. In their natural state, the baffles 231 partially cover the slots 23 to prevent the handle 61 from disengaging. The baffles 231 are configured to elastically deform when the handle 61 is struck by the hammer 13, giving way to the handle 61. The slots 23 allow the needle handle to disengage, enabling needle retention on the body surface after acupuncture, while the elastic baffles 231 prevent the acupuncture needle from falling out of the guide tube 2 during the movement after firing.

[0032] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 1 ,2 As shown in Figures 3, 4, and 8, a ring 32 is rotatably connected to the end of the sleeve 3 furthest from the human body in the axial direction. The inner wall of the ring 32 has an internal thread 321, and the outer wall of the guide tube 2 has an external thread 24. When the ring 32 rotates around the guide tube 2, the engagement of the internal thread 321 and the external thread 24 drives the sleeve 3 to move axially, thereby adjusting the distance between the baffle 31 and the end of the guide tube 2. When the sleeve 3 and the guide tube 2 are only slidably assembled, the puncture depth of the acupuncture needle can indeed be adjusted. However, the axial force applied to the device by the operator can easily cause axial slippage between the sleeve 3 and the guide tube 2, and stepless fine adjustment of the depth cannot be achieved. The rotational motion is converted into axial movement through thread engagement, thus achieving continuous adjustment.

[0033] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 1 , 4 As shown in Figure 8, a traction member 14 is provided at the top of the firing chamber 11. The traction member 14 passes through the top wall of the firing chamber 11 and is connected to the hammer 13. A silicone sealing ring is provided between the traction member 14 and the top wall of the firing chamber 11. When the traction member 14 is pulled by an external force, it drives the hammer 13 to move from the firing position to the compression position and maintains this position to lock the energy storage state of the elastic member 12.

[0034] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 1 , 4 As shown in Figure 8, one exposed end of the traction member 14 is connected to a power device configured to provide automated traction force to replace manual operation and realize an automated acupuncture needle ejection process. Alternatively, the traction member 14 has an exposed traction end 141, which is slidably connected to the outside of the guide tube 2 along the axial direction. The traction end 141 is specifically constructed as a block structure. As it approaches the human body surface along the axial direction of the guide tube 2, it drives the traction member 14 to pull the hammer 13 towards the compression position. When the traction end 141 is released, the hammer 13 is pushed by the elastic member 12 to the firing position and strikes the acupuncture needle handle 61.

[0035] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 3 , 7As shown in Figures 8 and 10, the set bolt 5 is threadedly connected to a nut 431. A slider 43 is fixed to one side of the nut 431. The slider 43 slides with the edge of the arc-shaped arm 42. During assembly, the set bolt 5 passes through the slider 43, the limiting groove 51, and the nut 431 in sequence, restricting the nut 431 to slide only along the arc-shaped edge of the arc-shaped arm 42. During the rotation of the guide tube 2 around the connecting shaft 421, when the set bolt 5 moves to the corresponding position along the limiting groove 51, the set bolt 5 always faces the central axis of the guide tube 2. The slider 43 can force the bolt to slide along the arc-shaped trajectory, ensuring that the locking force is aligned with the sleeve 3 and preventing the bolt from sliding during locking, which would cause the orientation of the set bolt 5 to shift.

[0036] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 3 , 7 As shown in Figure 8, the system also includes an elastic reset component 422, which is connected between the arc-shaped arm 42 and the sleeve 3. When the guide tube 2 is perpendicular to the base plate 41, the elastic reset component 422 is in its natural state. When the sleeve 3 rotates around the connecting shaft 421, it stretches the elastic reset component 422. When the locking bolt 5 is released, the elastic reset component 422 drives the sleeve 3 to reset. The elastic reset component 422 automatically drives the assembly to return to its initial position, which improves operating efficiency and solves the problem of having to manually reset it after each use.

[0037] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 4 , 8 As shown, there are fitting gaps between the driven part 131 of the hammer 13 and the inner wall of the firing chamber 11, and between the firing part 132 of the hammer 13 and the inner wall of the guide tube 2. The fitting gaps are configured to allow the hammer 13 to slide smoothly while limiting its radial runout. When the friction between the hammer 13 and the chamber wall is too great or the gap is too large, the fitting gaps can balance the smoothness of sliding and the limitation of radial runout. The fitting gaps are no greater than 0.1 mm, preferably 0.02 mm to 0.05 mm.

[0038] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 2 , 4As shown in Figures 5, 6, 8, and 9, the baffle 31 at the end of the sleeve 3 is annular, and the opening 311 is a circular hole located at the center of the annular baffle 31. The diameter of the circular hole is larger than the diameter of the needle body 62 and smaller than the diameter of the handle 61, so as to limit the length of the needle body 62 extending out of the end of the guide tube 2 when the hammer 13 strikes the handle 61. More specifically, the baffle 31 includes at least two strip structures symmetrically arranged around the central axis of the guide tube 2, and the circular hole is located between the two strip structures. The guide tube 2 is provided with a guide groove along the central axis toward its end facing the human body. The strip structures are adapted to the guide groove, so that the sleeve 3 and the guide tube 2 do not rotate circumferentially during relative sliding, thus avoiding mechanical interference between the movement of the sleeve 3 and the movement of the elastic reset member 422.

[0039] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 3 , 7 As shown in Figures 8 and 10, the end of the set bolt 5 is provided with a conical surface, and the corresponding position of the outer wall of the sleeve 3 is provided with a toothed groove. When the set bolt 5 is tightened, the end abuts into the toothed groove to increase the friction. Combined with the axial movement of the sleeve 3 and the guide tube 2 without relative rotation, the toothed groove of the outer wall of the set bolt 5 and the sleeve 3 can be engaged with each other at various angles. When the set bolt 5 is pressed against the sleeve 3, it cannot continue to move towards the sleeve 3. If the set bolt 5 is continued to be tightened, the relative rotation between it and the nut 431 will cause the arc arm 42 and the sleeve 3 to have a tendency to increase the distance between them, or even cause displacement. This will strengthen the connection stability between the set bolt 5 and the sleeve 3, or the support 4 and the guide tube 2 by increasing the contact pressure, and prevent the locked angle from changing.

[0040] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 2 , 4 As shown in Figures 8 and 9, the needle insertion notch 22 is located above the elastic plate 21. When the acupuncture needle is inserted, the handle 61 is restricted to the upper part of the elastic plate 21, and the upper end of the handle 61 is lower than the lower surface of the hammer 13 when it is in the firing position, ensuring that the handle 61 is effectively blocked by the elastic plate 21.

[0041] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 1 , 3 As shown in Figures 4 and 8, the firing chamber 11, guide tube 2, sleeve 3, and support 4 are all made of opaque medical materials, such as high-density polyethylene or rigid polyvinyl chloride, to obstruct the patient's view when the acupuncture needle is fired, reducing the risk of fainting. Alternatively, the firing chamber 11, guide tube 2, sleeve 3, and support 4 can be made of transparent materials, such as polycarbonate or polypropylene, to allow the observer to view the internal needle status. This provides both opaque and transparent material options to suit different scenarios.

[0042] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 1 , 4 As shown in Figure 8, the elastic element 12 is a conical helical spring, with a larger diameter at the end near the top of the firing chamber 11 and a smaller diameter at the end near the hammer 13, and it is coaxially sleeved on the outside of the hammer 13. The conical spring can provide a more stable axial driving force, avoid lateral tilting, and prevent uneven spring force from causing fluctuations in the ejection force.

[0043] The elastic reset element 422 is a tension spring, with its two ends connected to the outer wall of the sleeve 3 and the inner side of the arc-shaped arm 42, respectively. The tension spring structure is simple and reliable, ensuring the long-term effectiveness of the reset function. Alternatively, the elastic reset element 422 can be a rope made of elastic rubber, which maintains the position of the sleeve 3 through its own elasticity.

[0044] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 2 , 4 As shown in Figures 8 and 9, after one acupuncture treatment, the handle 61 overcomes the resistance of the elastic baffle 231 and radially disengages from the slot 23 by radially shifting the guide tube 2, thus leaving the acupuncture needle on the patient's body surface, while the needle ejector body separates from the acupuncture needle. This clarifies the action of shifting the guide tube 2 and achieves non-destructive separation of the device and the needle.

[0045] In some embodiments of this application, such as Figure 1-11 As shown, especially as Figure 1 , 4 As shown in Figure 8, when the hammer 13 is in the compressed position, the deformation of the elastic element 12 reaches its design limit. At this time, the firing part 132 of the hammer 13 maintains a preset safe distance from the top of the guide tube 2 to prevent accidental firing. This prevents accidental firing due to accidental activation when the energy storage is not complete.

[0046] During assembly, first insert the driven part 131 of the hammer 13 into the circular hole of the firing chamber 11, and connect the large diameter end of the conical spring to the top of the firing chamber 11. The firing chamber 11 is specifically constructed in a cylindrical structure with a cover, and the top cover is located at the end of the cylindrical structure away from the guide tube 2. Then, the elastic plate 21 is pressed into the annular groove on the inner wall of the guide tube 2 to ensure that the through hole 211 is aligned.

[0047] Next, insert the sleeve 3 into the guide tube 2, screw in the collar 32 to make the internal and external threads 24 engage, and install the baffle 31; finally, rotatably connect the guide tube 2 and the arc arm 42 of the support 4 through the connecting shaft 421, and install the elastic reset component 422 and the set bolt 5 assembly.

[0048] First, insert the needle by placing the acupuncture needle handle 61 through the notch in the guide tube 2. The elastic plate 21 blocks the handle 61, and the needle body 62 passes through the through hole 211 and the opening 311 of the baffle 31. Then, rotate the collar 32 around the guide tube 2 and adjust the position of the baffle 31 according to the scale lines to set the insertion depth. When adjusting the angle, rotate the guide tube 2 around the connecting shaft 421 and align the target angle through the scale of the arc arm 42. Tighten the set bolt 5 to lock the included angle of the guide tube 2. Pull the manual pull ring or the electric traction component 14, and the hammer 13 compresses the spring to the compressed position. Release the traction component 14, and the hammer 13 strikes the handle 61, causing the needle body 62 to penetrate the elastic plate 21 and pierce the subcutaneous tissue. Finally, move the guide tube 2 radially, and the handle 61 overcomes the elastic baffle 231 and disengages from the slot 23, leaving the needle on the body surface. The device is then disassembled.

[0049] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0050] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0051] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent implementations or modifications made without departing from the spirit of the art of this application, such as combinations, divisions or repetitions of features, should be included within the scope of protection of this application.

Claims

1. An acupuncture needle application aid device, comprising an acupuncture needle consisting of a handle and a needle body, characterized in that, include: The ejection assembly includes a firing chamber, an elastic element, and a hammer, wherein the hammer is disposed within the firing chamber and is capable of sliding linearly along the axial direction under the drive of the elastic element; A guide tube is coaxially fixed to the side of the firing chamber facing the human body. An elastic sheet is provided inside the guide tube, and a through hole is opened along the axial direction. The inner diameter of the through hole is smaller than the outer diameter of the acupuncture needle handle and larger than the outer diameter of the needle body. A sleeve is coaxially fitted on the outside of the guide tube and can move axially relative to the guide tube. A baffle is fixed at the end of the sleeve, and an opening is provided on the baffle for the needle body to pass through. Along the axial direction of the guide tube, the opening is aligned with the through hole. The guide tube is rotatably connected to the support via a connecting shaft. The set bolt has a limiting groove on the support. When the set bolt passes through the limiting groove and abuts against the outer wall of the sleeve, it locks the included angle between the guide tube and the support. When the elastic element is compressed and stores energy, it pulls the hammer to a compressed position, and the firing part of the hammer is located at the end of the guide tube away from the human body. When the hammer is released from the compressed position and moves to a firing position, the firing part strikes the handle, causing the handle to squeeze and pass through the through hole of the elastic sheet and finally be intercepted by the opening.

2. The acupuncture needle application auxiliary device according to claim 1, characterized in that, The hammer includes a driven part and a firing part along the axial direction. The cross-sectional profile of the driven part is adapted to the cross-sectional profile of the inner wall of the firing chamber to limit the hammer to slide only axially within the firing chamber. The inner diameter of the guide tube is smaller than the inner diameter of the firing chamber. The cross-sectional profile of the firing part is adapted to the cross-sectional profile of the inner wall of the guide tube, so that when the hammer is in the firing position, the firing part extends into the guide tube and strikes the handle.

3. The acupuncture needle application auxiliary device according to claim 1, characterized in that, The guide tube has a needle insertion notch on its wall, and the size of the needle insertion notch allows the handle to pass through and be inserted into the guide tube.

4. The acupuncture needle application auxiliary device according to claim 1, characterized in that, The guide tube and the sleeve have radially through slots on their walls, the width of which allows the handle to disengage radially; an elastic baffle is embedded in the slot, which partially covers the slot in its natural state to prevent the handle from disengaging.

5. The acupuncture needle application auxiliary device according to claim 1, characterized in that, The sleeve is rotatably connected to a ring at the end away from the human body in the axial direction. The inner wall of the ring is provided with an internal thread, and the outer wall of the guide tube is provided with an external thread. When the sleeve rotates around the guide tube, the engagement of the internal thread and the external thread drives the sleeve to move axially, thereby adjusting the distance of the baffle relative to the end of the guide tube.

6. The acupuncture needle application auxiliary device according to claim 1, characterized in that, A traction member is provided at the top of the firing chamber. The traction member passes through the top wall of the firing chamber and is connected to the hammer. When the traction member is pulled by an external force, it drives the hammer to move from the firing position to the compression position and maintains the position to lock the energy storage state of the elastic element.

7. The acupuncture needle application auxiliary device according to claim 1, characterized in that, The support includes a base plate and an arc-shaped arm with an angle scale. The two ends of the connecting shaft are respectively connected to the arc-shaped arm, and the limiting groove is provided on the arc-shaped arm.

8. An acupuncture needle application auxiliary device according to claim 7, characterized in that, The set bolt is threaded with a nut, and a slider is fixed to one side of the nut. The slider slides with the edge of the arc-shaped arm. When the set bolt is assembled, it passes through the slider, the limiting groove, and the nut in sequence, so that the nut is restricted to sliding only along the arc-shaped edge of the arc-shaped arm. During the rotation of the guide tube around the connecting shaft, when the set bolt moves to the corresponding position along the limiting groove, the set bolt always faces the central axis of the guide tube.

9. An acupuncture needle application auxiliary device according to claim 7, characterized in that, It also includes an elastic reset member, which is connected between the arc-shaped arm and the sleeve. When the guide tube is perpendicular to the base plate, the elastic reset member is in its natural state. When the sleeve rotates around the connecting shaft, it stretches the elastic reset member. When the locking bolt is released, the elastic reset member drives the sleeve to reset.

10. An acupuncture needle application auxiliary device according to claim 5, characterized in that, The baffle at the end of the sleeve is annular, and the opening is a circular hole located at the center of the annular baffle. The diameter of the circular hole is larger than the diameter of the needle body and smaller than the diameter of the handle, so as to limit the length of the needle body that extends out of the end of the guide tube when the hammer strikes the handle.

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