An acupuncture needle ejection system

Abstract

This invention discloses an acupuncture needle ejection system, including an acupuncture needle ejection buffer device and an acupuncture needle ejection box. The acupuncture needle ejection buffer device is used to adjust the needle insertion depth in conjunction with the acupuncture needle ejection box. The acupuncture needle ejection box includes a first sleeve, and an ejection rod for ejecting the acupuncture needle is connected to the end face of the first sleeve. The buffer device is located in the moving direction of the first sleeve and includes a rotating core, an outer nut, and a buffer pad. The buffer pad is located near the end face of the rotating core close to the first sleeve. The ejection rod extends outward through the buffer pad and the rotating core. The outer side of the rotating core is threadedly connected to the inner side of the outer nut to form a screw-nut pair, allowing the rotating core and the buffer pad to move in the moving direction of the first sleeve, thereby adjusting the distance between the buffer pad and the end face of the first sleeve. This invention can adjust the needle insertion depth, avoid excessive needle insertion depth, prevent damage to the patient's subcutaneous organs, avoid danger to the patient, and improve safety.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to an acupuncture needle ejection system. Background Technology

[0002] Acupuncture, as an invasive treatment method, inevitably causes some pain to patients. During acupuncture, due to the rich distribution of nerves and blood vessels under the skin, the pain from needle insertion becomes the main source of pain. Clinically, the skill and stability of the needle insertion technique determine the degree of skin pain; significant skin pain not only increases patients' fear of needles but also often affects the efficacy of acupuncture. To reduce the pain associated with needle insertion, previous studies have often attempted to provide quick and stable ejector needle insertion devices. However, current devices cannot adjust the insertion depth of the acupuncture needle. Different patients and different acupoints require different insertion depths. Without adjustable depth, not only will the treatment effect be affected, but excessive insertion may also damage subcutaneous organs, posing a danger to the patient. Therefore, to avoid the shortcomings of existing technology, it is necessary to improve it. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an acupuncture needle ejection buffer device, which can adjust the depth of needle insertion, avoid excessive needle depth that could damage the patient's subcutaneous organs, prevent danger to the patient, and improve safety.

[0004] According to one aspect of the present invention, an acupuncture needle ejection buffer device is provided for adjusting the needle insertion depth in conjunction with an acupuncture needle ejection box. The acupuncture needle ejection box includes a first sleeve, and an ejection rod for ejecting the acupuncture needle is connected to the end face of the first sleeve. The buffer device is disposed in the moving direction of the first sleeve. The buffer device includes a rotating core, an outer nut, and a buffer pad. The buffer pad is disposed at the end face of the rotating core near the first sleeve. The ejection rod extends outward through the buffer pad and the rotating core. The outer side of the rotating core is threadedly connected to the inner side of the outer nut to form a screw-nut pair, so that the rotating core and the buffer pad can move in the moving direction of the first sleeve to adjust the distance between the buffer pad and the end face of the first sleeve.

[0005] In some embodiments, the buffer pad is disposed in the moving direction of the first sleeve, and the buffer pad is capable of colliding with the end face of the first sleeve during the movement of the first sleeve.

[0006] In some embodiments, the cushioning pad is made of polyurethane material to reduce noise when the cushioning pad collides with the end face of the first sleeve.

[0007] In some embodiments, the rotating core has a guide plate at one end away from the first sleeve for guiding the ejector rod, the ejector rod passing through the guide plate.

[0008] In some embodiments, the diameter of the ejector rod is 1.5 mm, and the opening diameter of the guide plate is 1.6~1.8 mm.

[0009] In some embodiments, the adjustable distance between the buffer pad and the end face of the first sleeve is 4~8mm.

[0010] In some embodiments, the thickness of the cushioning pad is 3-4 mm.

[0011] According to another aspect of the present invention, an acupuncture needle ejection system is also provided, comprising an acupuncture needle ejection buffer device as described in the first aspect of the present invention, and further comprising an acupuncture needle ejection box; the acupuncture needle ejection box comprises a second sleeve, a first sleeve, a second elastic element, and a trigger element; in a compressed state, one end of the second elastic element abuts against the inner end face of the second sleeve, and the other end abuts against the inner end face of the first sleeve; a U-shaped mounting groove is provided on the side of the second sleeve, and a snap-fit ​​structure is provided at the end of the first sleeve, the snap-fit ​​structure being able to enter through the opening of the U-shaped mounting groove and, after rotation, snap-fit ​​against the end edge of the U-shaped mounting groove under the elastic force of the second elastic element; the second sleeve is configured to be movable relative to the first sleeve, an ejection rod is connected to the outer side of the end of the first sleeve, and a first window is provided on the side of the first sleeve; the trigger element is slidably disposed in the first window, the trigger element snaps against the end of the first window, and the trigger element is capable of elastic deformation outward along the side of the first sleeve; wherein, both the second sleeve and the first sleeve are circular tubes.

[0012] In some embodiments, the acupuncture needle ejection box further includes a housing, the second sleeve and the first sleeve are disposed inside the housing, and the trigger is mounted on the inner wall of the housing.

[0013] In some embodiments, a sleeve track is provided inside the housing, and the first sleeve is slidably disposed within the sleeve track.

[0014] In some embodiments, the diameter of the first sleeve is smaller than the diameter of the second sleeve, the first sleeve is inserted into the second sleeve, and the snap-fit ​​structure extends outward along the side of the first sleeve.

[0015] In some embodiments, the outer nut protrudes from the housing.

[0016] In some embodiments, the outer nut is also marked with graduations.

[0017] The acupuncture needle ejection buffer device according to the embodiments of the present invention has at least the following beneficial effects: the present invention can adjust the depth of needle insertion, avoid excessive needle insertion depth, prevent damage to the patient's subcutaneous organs, avoid causing danger to the patient, improve safety, and play a buffering and shock-absorbing role when the acupuncture needle ejection box ejects the acupuncture needle, making the acupuncture needle ejection box more stable when ejecting the acupuncture needle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of the acupuncture needle ejection system of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the internal structure of the acupuncture needle ejection system of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the acupuncture needle ejection system of the present invention. Figure 3 ; Figure 4 This is an external schematic diagram of the acupuncture needle ejection system of the present invention; Figure 5 This is a partially enlarged view of the outer nut, rotating core, and buffer pad of the present invention; Figure 6 This is a schematic diagram of the first sleeve, the second sleeve, and the trigger component of the present invention; Figure 7 This is a partially enlarged view of the connection point between the first sleeve and the second sleeve of the present invention.

[0019] In the diagram: 100, First sleeve; 110, First window; 120, Ejector rod; 130, Snap-fit ​​structure; 200, Second sleeve; 210, U-shaped assembly groove; 211, Insertion section; 212, Transition section; 213, Snap-fit ​​section; 220, Second elastic element; 300, Outer shell; 310, Sleeve track; 320, Acupuncture needle box mounting part; 330, Partition plate; 340, Sleeve cavity; 350, Reset cavity; 400, Trigger component; 410, Snap-fit ​​recess; 420, Snap-fit ​​protrusion; 430, Strip groove; 500, Pressing device; 510, Reset spring; 600, Outer nut; 610, Rotating core; 620, Buffer pad; 700, Guide plate. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figures 1-7As shown, an acupuncture needle ejection buffer device of the present invention is used to adjust the needle insertion depth in conjunction with an acupuncture needle ejection box. The acupuncture needle ejection box includes a first sleeve 100, and an ejection rod 120 for ejecting acupuncture needles is connected to the end face of the first sleeve 100. The buffer device is positioned in the moving direction of the first sleeve 100. The buffer device includes a rotating core 610, an outer nut 600, and a buffer pad 620. The buffer pad 620 is positioned near the end face of the rotating core 610 close to the first sleeve 100. The ejector rod 120 extends outward through the buffer pad 620 and the rotating core 610. The outer side of the rotating core 610 is threadedly connected to the inner side of the outer nut 600 to form a screw-nut pair, allowing the rotating core 610 and the buffer pad 620 to move in the moving direction of the first sleeve 100, thereby adjusting the distance between the buffer pad 620 and the end face of the first sleeve 100.

[0022] like Figure 1 , 2 As shown in Figures 3 and 5, the rotating core 610 is a cylindrical structure with threads on its surface. The inner side of the outer nut 600 has threads that mate with the threads on the surface of the rotating core 610. The rotating core 610 passes through the center of the outer nut 600. The threads on the outer surface of the cylindrical structure of the rotating core 610 are connected to the threads on the inner side of the outer nut 600. When the outer nut 600 rotates, it can drive the rotating core 610 to move along the axis of the outer nut 600. The surface of the outer nut 600 is also provided with an uneven anti-slip structure to increase the friction of the surface of the outer nut 600, making it easier for the user to rotate the outer nut 600 to adjust the position of the rotating core 610, thereby adjusting the distance between the buffer pad 620 connected to the rotating core 610 and the end face of the first sleeve 100.

[0023] When the first sleeve 100 moves for ejection, the buffer device acts as a shock absorber, making the ejection rod 120 connected to the end face of the first sleeve 100 more stable during ejection. The buffer pad 620 is set on the end face of the rotating core 610 near the first sleeve 100. When the first sleeve 100 moves a certain distance, the end face of the first sleeve 100 will collide with the buffer pad 620. Once the end face of the first sleeve 100 touches the buffer pad 620, it can no longer move forward. The buffer pad 620 acts as a barrier to the movement of the first sleeve 100, thus providing cushioning. The distance between the initial position of the rubber pad 620 and the end face of the first sleeve 100 is the movable distance of the first sleeve 100. Since the end face of the first sleeve 100 is connected to the ejector rod 120 for ejecting the acupuncture needle, the movable distance of the first sleeve 100 is also the movable distance of the ejector rod 120. The ejector rod 120 is used to push the acupuncture needle to insert into the patient. Therefore, the moving distance of the ejector rod 120 determines the insertion depth of the acupuncture needle. The insertion depth of the acupuncture needle can be adjusted by adjusting the distance between the initial position of the buffer rubber pad 620 and the end face of the first sleeve 100.

[0024] A buffer pad 620 is positioned on the end face of the rotating core 610 near the first sleeve 100. By changing the position of the rotating core 610, the initial distance between the buffer pad 620 and the end face of the first sleeve 100 can be adjusted. Since the outer surface of the rotating core 610 and the inner surface of the outer nut 600 are threaded together to form a screw-nut pair, rotating the outer nut 600 drives the rotating core 610 to move, thereby changing the initial distance between the buffer pad 620 and the end face of the first sleeve 100. Specifically, when it is necessary to reduce the depth of needle insertion, rotating the outer nut 600 moves the rotating core 610 towards the first sleeve 100, causing the buffer pad 620 to move towards the first sleeve 100, thus reducing the distance between the buffer pad 620 and the end face of the first sleeve 100. The distance between the initial position of the end face of the first sleeve 100 and the outer nut 600 is such that when the first sleeve 100 moves the ejector rod 120 to eject, the end face of the first sleeve 100 will stop upon colliding with the buffer pad 620, thus shortening the moving distance of the first sleeve 100 and reducing the depth of needle insertion. Conversely, by rotating the outer nut 600 in the opposite direction, the rotating core 610 moves away from the first sleeve 100, increasing the distance between the initial position of the buffer pad 620 and the end face of the first sleeve 100. This means that the first sleeve 100 needs to move a greater distance during ejection before colliding with the buffer pad 620 and stopping, increasing the moving distance of the ejector rod 120 and thus increasing the depth of needle insertion.

[0025] It should be noted that the initial distance between the buffer pad 620 and the end face of the first cannula 100 should not be set too large, so as to ensure that the maximum distance between the buffer pad 620 and the end face of the first cannula 100 is within a safe range, and to prevent the needle from being inserted too deeply and endangering the patient.

[0026] like Figures 1-3 As shown, the buffer pad 620 is positioned in the moving direction of the first sleeve 100. The buffer pad 620 can collide with the end face of the first sleeve 100 during its movement. When the first sleeve 100 moves, it will stop upon colliding with the buffer pad 620, thereby stopping the ejector rod 120. Therefore, the buffer pad 620 needs to collide with the end face of the first sleeve 100 to make surface contact, which can better stop the first sleeve 100. The buffer pad 620 collides with the end face of the first sleeve 100, so that the surface contact area during the collision is large, which can stably collide with the end face of the first sleeve 100 and stop the first sleeve 100 from moving.

[0027] To reduce the noise generated when the buffer pad 620 collides with the end face of the first sleeve 100, the buffer pad 620 is made of polyurethane material. This reduces the noise when the buffer pad 620 collides with the end face of the first sleeve 100. Polyurethane material has good sound insulation and sound absorption properties. Every time the ejected acupuncture needle is used, the buffer pad 620 collides with the end face of the first sleeve 100. Reducing the noise generated by the collision can alleviate the patient's fear during acupuncture treatment.

[0028] like Figure 1 , 2 As shown in Figures 3 and 5, in order to make the ejection rod 120 more stable, the rotating core 610 is provided with a guide plate 700 at the end away from the first sleeve 100 for guiding the ejection rod 120. The ejection rod 120 passes through the guide plate 700, and the guide plate 700 guides the movement of the ejection rod 120, making the movement direction of the ejection rod 120 more stable. Specifically, when the first sleeve 100 moves and drives the ejection rod 120 to eject the acupuncture needle, the ejection rod 120 will only eject along the guide hole of the guide plate 700 because it passes through the guide plate 700. In this way, the ejection direction is consistent each time, and it is not easy for deviation to occur, which would affect the ejection direction of the acupuncture needle.

[0029] The ejector rod 120 has a diameter of 1.5 mm, and the guide plate 700 has an opening diameter of 1.6~1.8 mm. Since the diameter of a common acupuncture needle is 1.3 mm, the diameter of the ejector rod 120 is set to 1.5 mm, which is slightly larger than the diameter of a common acupuncture needle. This ensures that the ejector rod 120 can stably push the acupuncture needle for insertion. The opening diameter of the guide plate 700 is 1.6~1.8 mm, which is slightly larger than the diameter of the ejector rod 120, so that the ejector rod 120 can pass through without friction with the ejector rod 120 when it is ejected.

[0030] To ensure safety, the adjustable distance between the buffer pad 620 and the end face of the first sleeve 100 is 4-8mm. The distance between the buffer pad 620 and the end face of the first sleeve 100 is the distance that the ejector rod 120 pushes the acupuncture needle to move when ejected. To ensure safety, the distance between the buffer pad 620 and the end face of the first sleeve 100 should not be too large, otherwise it will cause the needle to penetrate too deeply and endanger the patient. The minimum distance between the buffer pad 620 and the end face of the first sleeve 100 is 4mm to ensure that the needle can be inserted into the skin when inserted, and the maximum distance is 8mm to avoid the needle penetration depth being too deep. Generally speaking, the needle penetration depth is within 16mm, which is a safe distance. The maximum ejection needle penetration depth is set to 8mm. After the acupuncture needle is ejected and inserted into the patient's skin, the medical staff will adjust the needle penetration depth to ensure that the acupuncture needle enters the human body aseptically and safely.

[0031] The thickness of the cushioning pad 620 is 3~4mm. The cushioning pad 620 should not be too thin, otherwise it will easily become fatigued during long-term use, thus weakening the cushioning effect.

[0032] The diameter of the first sleeve 100 is 6mm, and the buffer pad 620 is equal to or smaller than the diameter of the first sleeve 100, ensuring that the first sleeve 100 can collide head-on with the buffer pad 620 during its movement to play a buffering role.

[0033] According to another aspect of the present invention, an acupuncture needle ejection system is also provided, comprising an acupuncture needle ejection buffer device as described in the first aspect of the present invention, and further comprising an acupuncture needle ejection box; the acupuncture needle ejection box comprises a second sleeve 200, a first sleeve 100, a second elastic element 220, and a trigger element 400; in a compressed state, one end of the second elastic element 220 abuts against the inner end face of the second sleeve 200, and the other end abuts against the inner end face of the first sleeve 100; a U-shaped mounting groove 210 is provided on the side of the second sleeve 200, and a snap-fit ​​structure 130 is provided at the end of the first sleeve 100. The snap-fit ​​structure 130 can enter through the opening of the U-shaped assembly groove 210 and, after rotation, snap into the end edge of the U-shaped assembly groove 210 under the elastic force of the second elastic member 220. The second sleeve 200 is configured to be movable relative to the first sleeve 100. The outer side of the end of the first sleeve 100 is connected to a catapult rod 120. The side of the first sleeve 100 is provided with a first window 110. The trigger member 400 is slidably disposed in the first window 110. The trigger member 400 is snapped into the end of the first window 110. The trigger member 400 can undergo elastic deformation outward along the side of the first sleeve 100.

[0034] The U-shaped assembly groove 210 and the snap-fit ​​structure 130 can also prevent the acupuncture needle from being inserted too deeply. However, if only the U-shaped assembly groove 210 and the snap-fit ​​structure 130 are used to block the ejection of the acupuncture needle, fatigue is likely to occur after prolonged use.

[0035] The second elastic element 220 abuts against the inner end face of the second sleeve 200 and the inner end face of the first sleeve 100 respectively in the compressed state. Therefore, the elastic force of the second elastic element 220 will generate a pushing force in opposite directions to the second sleeve 200 and the first sleeve 100, so that the snap-fit ​​structure 130 can snap with the end edge of the U-shaped assembly groove 210 under the pushing force generated by the elastic force.

[0036] like Figure 6 , Figure 7As shown, the U-shaped assembly groove 210 allows the first sleeve 100 to be easily assembled with the second sleeve 200. During assembly, the snap-fit ​​structure 130 at the end of the first sleeve 100 simply enters through the opening of the U-shaped assembly groove 210. This process requires overcoming the elastic force of the second elastic element 220 and further compressing the second elastic element 220 until the snap-fit ​​structure 130 enters along the opening of the U-shaped assembly groove 210 and touches the edge of the U-shaped assembly groove 210. Then, the first sleeve 100 is rotated and twisted to allow the snap-fit ​​structure 130 to continue moving along the U-shaped assembly groove 210. Finally, when the snap-fit ​​structure 130 moves to the end of the U-shaped assembly groove 210, it moves along the edge of the U-shaped assembly groove 210. 10 moves to the end of the U-shaped assembly groove 210. During this process, the elastic force of the second elastic element 220 is released, and the second elastic element 220 extends, allowing the snap-fit ​​structure 130 to snap into the end edge of the U-shaped assembly groove 210 under the action of the elastic force of the second elastic element 220. At this time, although the second elastic element 220 has been extended, it has not yet returned to its initial length when it is not compressed. Therefore, the second elastic element 220 is still in a compressed state and will generate elastic force in both directions, that is, in the direction of the inner end face of the second sleeve 200 and in the direction of the inner end face of the first sleeve 100, thereby keeping the snap-fit ​​structure 130 snapped into the end edge of the U-shaped assembly groove 210.

[0037] It should be noted that the end of the U-shaped assembly groove 210 can be set either clockwise or counterclockwise from the opening of the U-shaped assembly groove 210. If it is set clockwise, when the snap-fit ​​structure 130 enters along the opening of the U-shaped assembly groove 210 and touches the edge of the U-shaped assembly groove 210, the first sleeve 100 is rotated clockwise. Conversely, the first sleeve 100 is rotated counterclockwise.

[0038] The trigger 400 engages with the end of the first window 110. Under external force, the trigger 400 can undergo elastic deformation outward along the side of the first sleeve 100. Specifically, since the second sleeve 200 is movable relative to the first sleeve 100, during its movement towards the first sleeve 100, the edge of the second sleeve 200 contacts the trigger 400 when it reaches the end position of the first window 110. During the continued movement, the end edge of the second sleeve 200 will push the trigger 400 outward, thereby causing the trigger 400 to disengage from the end of the first window 110. The trigger 400 leaves the first window 110 and disengages from the lock, unlocking the first sleeve 100. As the second sleeve 200 moves toward the first sleeve 100, it further compresses the second elastic element 220. At this time, the compressed second elastic element 220 will release elastic potential energy, causing the first sleeve 100 to move away from the second sleeve 200, pushing the ejection rod 120 on the first sleeve 100 to eject.

[0039] like Figure 6 As shown, specifically, the trigger component 400 has strip-shaped grooves 430 on both sides. The trigger component 400 includes a locking recess 410 and a locking protrusion 420, which are separated by the strip-shaped grooves 430. The locking recess 410 is slidably disposed in the first window 110. When it slides to the end of the first window 110, it engages and locks with the end of the first window 110, restricting the first sleeve 100 from moving away from the second sleeve 200. The locking protrusion 420 is inclined outward. When the edge of the end of the second sleeve 200 moves to the first window 110, it will press the locking protrusion 420 outward, thereby causing the locking recess 410 to disengage from the locking with the edge of the first window 110.

[0040] In other embodiments, the trigger 400 can also be of other shapes. It is only necessary that the trigger 400 can be released from the locking of the first window 110 by external force during the movement of the second sleeve 200, so that the second elastic member 220 can release elastic potential energy to push the first sleeve 100 and cause the ejection rod 120 to be ejected.

[0041] Both the second sleeve 200 and the first sleeve 100 are round tubes. The round tube structure makes it easier to snap the structure 130 into the opening of the U-shaped assembly groove 210. When the structure 130 enters and touches the edge of the U-shaped assembly groove 210, the first sleeve 100 can be rotated and twisted, making it easier to assemble the first sleeve 100 and the second sleeve 200.

[0042] In other embodiments, the second sleeve 200 and the first sleeve 100 can also be octagonal or hexagonal. As long as the second sleeve 200 and the first sleeve 100 have enough rotation space, the U-shaped assembly groove 210 can be used to make it easier to assemble the first sleeve 100 and the second sleeve 200.

[0043] The acupuncture needle ejection box also includes a housing 300, a second sleeve 200 and a first sleeve 100 disposed inside the housing 300, and a trigger 400 installed on the inner wall of the housing 300. By installing the trigger 400 on the inner wall of the housing 300, the position of the trigger 400 is fixed, which can ensure that the needle is stably triggered. When squeezed by the second sleeve 200, it can promptly undergo elastic deformation along the side of the first sleeve 100 to release the engagement with the end of the first window 110.

[0044] The outer casing 300 has a sleeve track 310 inside, and the first sleeve 100 is slidably disposed in the sleeve track 310. The sleeve track 310 is a hollow circular tube structure that guides the first sleeve 100. It is made of metal material so that the surface is smooth and does not affect the movement of the first sleeve 100.

[0045] The diameter of the first sleeve 100 is smaller than the diameter of the second sleeve 200. The first sleeve 100 is inserted into the second sleeve 200. The snap-fit ​​structure 130 extends outward along the side of the first sleeve 100. The diameter of the first sleeve 100 is smaller than the diameter of the second sleeve 200 so that the second sleeve 200 is outside the first sleeve 100. This allows the second sleeve 200 to move towards the first sleeve 100. When it moves to the first window 110, it can touch the trigger 400. Under the action of the second sleeve 200, the trigger 400 undergoes elastic deformation outward along the side of the first sleeve 100, releasing the snap-fit ​​from the end of the first window 110.

[0046] like Figure 7 As shown, specifically, the U-shaped assembly groove 210 includes an insertion section 211, a transition section 212, and a snap-fit ​​section 213. The snap-fit ​​structure 130 can be inserted and installed along the insertion section 211, the transition section 212, and the snap-fit ​​section 213. The snap-fit ​​structure 130 snaps with the end edge of the snap-fit ​​section 213. The snap-fit ​​structure 130 enters the insertion section 211 from the opening of the U-shaped assembly groove 210. When it reaches the end of the insertion section 211, the first sleeve 100 is rotated and twisted, causing the snap-fit ​​structure 130 to move along the transition section 212. When the snap-fit ​​structure 130 moves to the end of the transition section 212, the rotation of the first sleeve 100 is stopped, allowing the snap-fit ​​structure 130 to move along the snap-fit ​​section 213, eventually moving to the end of the snap-fit ​​section 213, i.e., the end of the U-shaped assembly groove 210, so that the snap-fit ​​structure 130 snaps with the end edge of the U-shaped assembly groove 210 under the elastic force of the second elastic member 220.

[0047] To ensure force balance during snap-fit, two U-shaped mounting grooves 210 are provided on the side of the second sleeve 200. The two U-shaped mounting grooves 210 are symmetrical about the axis of the second sleeve 200. The end of the first sleeve 100 is also provided with two snap-fit ​​structures 130 that are symmetrical about the axis. During assembly, the two snap-fit ​​structures 130 enter the two U-shaped mounting grooves 210 at the same time. The movement causes the ends of the two U-shaped mounting grooves 210 to snap into the edge of the end of the two U-shaped mounting grooves 210 respectively, so that the forces on both sides of the first sleeve 100 are balanced during snap-fit, and the snap-fit ​​is stable.

[0048] The trigger 400 is engaged with the end of the first window 110. Under the action of external force, the trigger 400 can undergo elastic deformation outward along the side of the first sleeve 100, thereby releasing the engagement with the end of the first window 110. By releasing the engagement, the elastic potential energy of the second elastic element 220 is released, making the ejection rod 120 more stable when ejected. Moreover, the engagement is released each time the second sleeve 200 moves to the first window 110, so that the elastic potential energy released by the second elastic element 220 each time remains stable, and the ejection force of the ejection rod 120 is stable.

[0049] To ensure a stable snap-fit ​​connection, the snap-fit ​​structure 130 is designed as a hook. The hook structure allows the snap-fit ​​structure 130 to hook onto the outer side of the second sleeve 200 during snap-fit, making the snap-fit ​​connection more stable and reliable.

[0050] To facilitate the movement of the second sleeve 200 toward the first sleeve 100 in practical use, a pressing device 500 is connected to the end of the second sleeve 200 that is away from the first sleeve 100. The pressing device 500 can push the second sleeve 200 toward the first sleeve 100 to compress the second elastic element 220. By pressing the pressing device 500, the second sleeve 200 can be stably driven to move toward the first sleeve 100. In practical use, the structure is simple, the operation is convenient, and it is not easy to get stuck.

[0051] The housing 300 is equipped with a return spring 510. When the pressing device 500 moves toward the second sleeve 200, it can compress the return spring 510. After each pressing of the pressing device 500, the return spring 510 can reset the pressing device 500. Moreover, the second sleeve 200 is connected to the pressing device 500. The reset of the pressing device 500 also drives the second sleeve 200 to reset. After the second sleeve 200 resets, it no longer squeezes the trigger 400, which undergoes elastic deformation outward along the side of the first sleeve 100. The trigger 400 also resets and re-engages with the end of the first window 110. The pressing device 500 can be used continuously and conveniently. After one ejection of the acupuncture needle, the pressing device 500 resets under the action of the return spring 510 and can be pressed again to eject the acupuncture needle, thus continuously ejecting the acupuncture needle and achieving the effect of continuous needle ejection.

[0052] The housing 300 includes a reset cavity 350 and a sleeve cavity 340, which are separated by a partition 330. A first sleeve 100 is disposed in the sleeve cavity 340, and a second sleeve 200 passes through the partition 330 to penetrate both the reset cavity 350 and the sleeve cavity 340. A reset spring 510 is sleeved on the outside of the second sleeve 200. One end of the reset spring 510 is connected to the partition 330, and the other end is connected to the pressing device 500. By connecting the reset spring 510 through the partition 330, the pressing device 500 can be pressed. When the pressing device 500 and the partition 330 are pressed together, the return spring 510 is compressed, allowing the return spring 510 to store elastic potential energy, preparing for the reset of the pressing device 500. The partition 330 provides a connection for the return spring 510. Otherwise, the return spring 510, which is sleeved outside the second sleeve 200, cannot be compressed and the pressing device 500 cannot be reset. At the same time, the reset of the pressing device 500 can also drive the second sleeve 200 connected to the pressing device 500 to be reset. In this way, the acupuncture needle can be continuously ejected by manual pressing.

[0053] like Figures 1-3 As shown, the acupuncture needle ejection box is provided with an acupuncture needle box mounting part 320 for mounting the acupuncture needle box and cooperating with the ejection rod 120 to eject the acupuncture needle.

[0054] To facilitate the adjustment of the position of the buffer pad 620 by medical staff, the outer nut 600 protrudes from the outer casing 300. This allows medical staff to rotate the outer nut 600 without disassembling the outer casing 300, thereby adjusting the position of the rotating core 610 to adjust the distance between the buffer pad 620 and the end face of the first sleeve 100. This, in turn, adjusts the movement distance of the ejection rod 120 to adjust the insertion depth of the acupuncture needle during ejection.

[0055] The outer nut 600 is also marked with a scale, so when the outer nut 600 is rotated to adjust the distance between the buffer pad 620 and the end face of the first sleeve 100, the adjustment can be made precisely according to the scale, thereby determining how far the outer nut 600 needs to be rotated, so that the insertion depth of the acupuncture needle ejection can be adjusted more accurately and stably.

[0056] The acupuncture needle ejection buffer device according to an embodiment of the present invention has at least the following beneficial effects: The present invention can adjust the depth of needle insertion. The outer side of the rotating core 610 and the inner side of the outer nut 600 are threadedly connected to form a screw-nut pair. Rotating the outer nut 600 causes the rotating core 610 to move along the axial direction of the outer nut 600, thereby driving the buffer pad 620 on the rotating core 610 to move. By moving the buffer pad 620, the position of the buffer pad 620 is changed, and the distance between the buffer pad 620 and the end face of the first sleeve 100 is adjusted. When the first sleeve 100 moves, it will stop when its end face collides with the buffer pad 620, causing the ejector rod 120 to stop moving as well. Therefore, by changing the distance between the buffer pad 620 and the end face of the first sleeve 100, the distance at which the ejector rod 120 ejects the acupuncture needle can be adjusted, thereby adjusting the insertion depth of the acupuncture needle during ejection. This avoids excessive insertion depth, which could damage the patient's subcutaneous organs, thus preventing danger to the patient and improving safety. The ejector box also acts as a buffer and shock absorber when ejecting the acupuncture needle, making the ejector box more stable when ejecting the acupuncture needle.

[0057] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An acupuncture needle ejection system, characterized in that, include: Acupuncture needle ejection buffer device and acupuncture needle ejection box; The acupuncture needle ejection box includes: a first sleeve, a second sleeve, a second elastic element, and a trigger element; In the compressed state, one end of the second elastic element abuts against the inner end face of the second sleeve, and the other end abuts against the inner end face of the first sleeve. The second sleeve has a U-shaped assembly groove on its side, and the end of the first sleeve has a snap-fit ​​structure. The snap-fit ​​structure can enter through the opening of the U-shaped assembly groove and, after rotation, snap-fit ​​with the end edge of the U-shaped assembly groove under the elastic force of the second elastic element. The second sleeve is designed to be movable relative to the first sleeve. A ejector rod for ejecting acupuncture needles is connected to the end face of the first sleeve. The side of the first sleeve has a first window. The trigger component is slidably disposed in the first window, the trigger component is engaged with the end of the first window, and the trigger component can undergo elastic deformation outward along the side of the first sleeve. Both the second sleeve and the first sleeve are round tubes; The acupuncture needle ejection buffer device is used to adjust the needle insertion depth in conjunction with the acupuncture needle ejection box. The buffer device is set in the moving direction of the first sleeve. The buffer device includes a rotating core, an outer nut, and a buffer pad. The buffer pad is set at the end face of the rotating core near the first sleeve. The ejection rod extends outward through the buffer pad and the rotating core. The outer side of the rotating core is threadedly connected to the inner side of the outer nut to form a screw-nut pair, so that the rotating core and the buffer pad can move in the moving direction of the first sleeve to adjust the distance between the buffer pad and the end face of the first sleeve.

2. The acupuncture needle ejection system according to claim 1, characterized in that, The buffer pad is disposed in the moving direction of the first sleeve, and the buffer pad can collide with the end face of the first sleeve during the movement of the first sleeve.

3. The acupuncture needle ejection system according to claim 2, characterized in that, The buffer pad is made of polyurethane material to reduce noise when it collides with the end face of the first sleeve.

4. The acupuncture needle ejection system according to claim 3, characterized in that, The rotating core has a guide hole plate at the end away from the first sleeve for guiding the ejector rod, and the ejector rod passes through the guide hole plate.

5. The acupuncture needle ejection system according to claim 4, characterized in that, The ejector rod has a diameter of 1.5 mm, and the guide plate has an opening diameter of 1.6~1.8 mm.

6. The acupuncture needle ejection system according to any one of claims 1 to 5, characterized in that, The adjustable distance between the buffer pad and the end face of the first sleeve is 4~8mm.

7. The acupuncture needle ejection system according to any one of claims 1 to 5, characterized in that, The thickness of the cushioning pad is 3~4mm.

8. The acupuncture needle ejection system according to claim 1, characterized in that, The acupuncture needle ejection box also includes a housing, with the second sleeve and the first sleeve disposed inside the housing, and the trigger element installed on the inner wall of the housing.

9. The acupuncture needle ejection system according to claim 8, characterized in that, The outer nut protrudes from the outer shell.

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