Anti-laceration hemodialysis needle

Abstract

The application discloses an anti-puncture hemodialysis puncture needle and relates to the technical field of hemodialysis medical devices.The anti-puncture hemodialysis puncture needle comprises a mounting sleeve, a needle tip which is slidably connected to the inner surface wall of the mounting sleeve, and a group of protection components which are arranged on the outer surface of the mounting sleeve.The protection components, the squeezing components, the first electromagnetic plate, the first spring and the limiting column are cooperated to automatically assist in wrapping the needle tip, and the medical staff does not need to provide a pushing force with one hand, so that the problem of force exertion is solved, the protection sleeve is ensured to smoothly slide to the position of the needle tip to avoid exposure, meanwhile, the squeezing components drive the roller shaft through the electromagnetic guide rod to cooperate with the capsule to form secondary protection on the needle tip, so that the risk of puncture is further reduced, in addition, the sawtooth strip and the limiting block can limit the movement of the protection sleeve, the microwave dry method breaking device is convenient for processing the capsule, the PLC controller is cooperated to regulate and control to ensure the stable operation of the protection structure, the probability of accidental puncture of the medical staff is effectively reduced, and the risk of blood-borne disease infection is reduced.

Description

Technical Field

[0001] This invention relates to the field of hemodialysis medical device technology, specifically a hemodialysis puncture needle designed to prevent puncture injuries. Background Technology

[0002] In the treatment of end-stage renal diseases such as chronic renal failure and uremia, hemodialysis is one of the core means of sustaining life. This treatment process requires the establishment of a pathway between the patient's blood vessels and the external dialysis equipment through a puncture needle to achieve the extraction, purification and reinfusion of blood. Therefore, the safety and reliability of the puncture needle are directly related to the treatment effect and the health of both doctors and patients.

[0003] Puncture-resistant hemodialysis needles are primarily designed to prevent cross-infection of the needle tip. While existing safety devices include a protective sheath that is pushed to cover the needle after it is withdrawn, thus preventing accidental needle injuries to medical staff after treatment, this approach still presents the following problems: Existing active safety devices for hemodialysis needles require healthcare workers to use one hand to pull out the needle and the other hand to continuously press on the puncture site to prevent bleeding during removal. This is inconvenient for healthcare workers. Specifically, after pulling out the needle, they need to push the protective sleeve with one hand. However, with one hand, the angle of force exerted by the fingers is limited and the force is dispersed, making it difficult to provide sufficient pushing force to allow the protective sleeve to slide smoothly to the needle tip. The needle tip is still noticeably exposed. This incomplete protection makes healthcare workers prone to needle stick injuries due to minor hand movements or accidental contact when handling the needle, thus increasing the risk of bloodborne disease infection.

[0004] Therefore, we have proposed a puncture-resistant hemodialysis needle to address the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a puncture-resistant hemodialysis needle to address the problem described in the background art. Existing active safety devices for hemodialysis needles require medical personnel to use one hand to pull out the needle while simultaneously applying continuous pressure to the puncture site with the other hand to prevent bleeding during removal. This inconvenience is specifically manifested in the following: after removing the needle, the medical personnel need to push the protective sleeve with one hand. However, with one hand, the angle of force exerted by the fingers is limited and the force is dispersed, making it difficult to provide sufficient pushing force to smoothly slide the protective sleeve to the needle tip, leaving the needle tip still noticeably exposed. This incomplete protection makes it easy for medical personnel to be punctured by minor hand movements or accidental contact when handling the needle, thus increasing the risk of bloodborne disease infection.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a puncture-resistant hemodialysis needle, comprising: The mounting sleeve is used to protect the internal puncture needle; The needle tip is slidably connected to the inner surface wall of the mounting sleeve; A protective component is disposed opposite to the outer surface of the mounting sleeve along the central axis of the mounting sleeve in a first direction. The protective component is used to cover the needle tip to prevent puncture. A compression assembly is disposed inside the mounting sleeve along a first direction, and the compression assembly is used for secondary protection of the needle tip. The protective assembly includes a protective sleeve and a set of first springs. A first electromagnetic plate is slidably connected to the inner surface of the protective sleeve. The front end and the end end of the first springs are fixedly installed to the surface of the protective sleeve and the first electromagnetic plate, respectively. The protective assembly uses electromagnetic force to make the protective sleeve automatically cover the needle tip without the need for medical personnel to push it, thus preventing the needle tip from being exposed. The extrusion assembly includes a roller, an electromagnetic guide rod, and a capsule. A second U-shaped plate is fixedly installed at the end of the electromagnetic guide rod. The roller rotates around the axis of the second U-shaped plate. The outer surface of the capsule is adhesively connected to the inner wall of the needle tip. The extrusion assembly compresses air to move the gel flowing out after the capsule is broken to the needle tip opening. After the gel solidifies, it forms a secondary protection.

[0007] Preferably, the outer surfaces of both sides of the mounting sleeve are provided with slots near the bottom, one end of the needle tip is fixedly connected to a connecting sleeve, one end of the connecting sleeve is fixedly connected to a needle tube, a PLC controller is fixedly installed on the outer surface of the mounting sleeve, and a set of limiting posts are symmetrically fixedly installed on the outer surface of the first electromagnetic plate, and the outer surface of the set of limiting posts is slidably connected to the inner wall of the protective sleeve.

[0008] Preferably, a set of the protective components further includes: a serrated strip and a fixing block, wherein the outer surface of the serrated strip is fixedly installed on the outer surface of the mounting sleeve, and limit blocks are fixedly installed on both outer surfaces of the serrated strip, the limit blocks being used to limit the movement of the protective sleeve; a mounting plate is fixedly installed on the outer surface of the first electromagnetic plate, and a microwave dry crushing device is fixedly installed on the outer surface of the mounting plate near the center, the microwave dry crushing device being used to crush capsules.

[0009] Preferably, a memory metal sheet is fixedly installed on the inner wall of the protective sleeve, a second spring is fixedly installed on the outer surface of the protective sleeve, an installation block is fixedly connected to the outer surface of the fixing block, a first rotating rod is rotatably connected to the inner wall of the installation block, and a pawl is fixedly connected to the outer surface of the first rotating rod. The pawl is used to limit the movement of the protective sleeve.

[0010] Preferably, a first connecting plate is fixedly connected to the outer surface of the fixing block, and a second electromagnetic plate is fixedly installed on the outer surface of the first connecting plate near the upper part. The outer surface of the fixing block is fixedly connected to the outer surface of the mounting sleeve, and the outer surface of the protective sleeve is slidably connected to the outer surface of the mounting sleeve.

[0011] Preferably, one set of the extrusion assembly further includes a first U-shaped plate, the inner wall of the first U-shaped plate is rotatably connected to a second rotating rod, the outer surface of the second rotating rod is fixedly connected to a second connecting plate, the outer surface of the second connecting plate is fixedly installed with the outer surface of the electromagnetic guide rod, and the outer surface of the first U-shaped plate is fixedly connected to the inner wall of the mounting sleeve.

[0012] Preferably, a set of disassembly components is provided on both outer surfaces of the needle tube, and the set of disassembly components facilitates the disassembly of the needle tube; One set of the disassembly components includes a third connecting plate and a fourth connecting plate. The outer surface of the third connecting plate is provided with a triangular groove, and a triangular block is slidably connected to the inner surface wall of the triangular groove.

[0013] Preferably, a connecting rod is fixedly connected to the outer surface of the triangular block near the center, a third spring is provided on the outer surface of the connecting rod, and a fixing plate is slidably connected to the outer surface of the connecting rod.

[0014] Preferably, the outer surface of the fixing plate is fixedly connected to the inner wall of the slot, and the outer surface of the fourth connecting plate is fixedly mounted with a third electromagnetic plate.

[0015] Preferably, the outer surface of the fourth connecting plate is fixedly connected to the outer surface of the fixing block, and the outer surface of the third connecting plate is fixedly installed to the outer surface of the needle.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the protective and squeezing components enable the first electromagnetic plate in the protective component, in conjunction with the first spring and the limiting post, to automatically assist in wrapping the needle tip. This eliminates the need for medical personnel to provide pushing force with one hand, solving the problem of applying force and ensuring that the protective sleeve smoothly slides to the needle tip to prevent exposure. At the same time, the squeezing component, through the electromagnetic guide rod driving the roller shaft, works with the capsule to form a secondary protection for the needle tip, further reducing the risk of puncture wounds. In addition, the serrated strip and the limiting block can limit the movement of the protective sleeve, and the microwave dry crushing equipment facilitates the processing of the capsule. With the help of the PLC controller, the protective structure is kept running stably, effectively reducing the probability of accidental puncture wounds to medical personnel and lowering the risk of infection with blood-borne diseases.

[0017] 2. In this invention, by using the disassembly components, the PLC controller can drive the triangular block to detach and release the needle tube fixation, thus separating disposable waste parts from reusable protective devices. There is no need to discard the entire device, and the separation process is tool-free and easy to operate. This reduces the wear and tear on reusable parts during disassembly, allowing these protective devices to be sterilized and reused with new puncture needles. This not only reduces the cost of consumables for a single hemodialysis session but also reduces the amount of medical waste generated. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a puncture-resistant hemodialysis needle according to the present invention; Figure 2 This is a cross-sectional view of the overall structure of a puncture-resistant hemodialysis needle according to the present invention; Figure 3 This is a schematic diagram of the protective component in a puncture-resistant hemodialysis needle according to the present invention; Figure 4 This is an enlarged schematic diagram of a portion of the protective component structure in a puncture-resistant hemodialysis needle according to the present invention; Figure 5 This is a plan view of the protective component in a puncture-resistant hemodialysis needle according to the present invention; Figure 6 This is a plan view of the squeezing component in a puncture-resistant hemodialysis needle according to the present invention; Figure 7 This is a schematic diagram of a partial compression component in a puncture-resistant hemodialysis needle according to the present invention; Figure 8 This is a schematic diagram of the disassembly assembly in a puncture-resistant hemodialysis needle according to the present invention; Figure 9 This is an enlarged view of the disassembly assembly in a puncture-resistant hemodialysis needle according to the present invention; Figure 10 This is a structural plan view of the disassembly assembly in a puncture-resistant hemodialysis needle according to the present invention.

[0019] In the diagram: 1. Mounting sleeve; 12. Slot; 2. Needle tube; 3. Connecting sleeve; 4. Needle tip; 5. Protective component; 501. Protective sleeve; 502. First electromagnetic plate; 503. First spring; 504. Limiting post; 505. Mounting plate; 506. Microwave dry crushing equipment; 507. Sawtooth strip; 508. Limiting block; 509. Memory metal sheet; 510. Second spring; 511. Fixing block; 512. Mounting block; 513. First rotating rod; 514. Pawl; 515. First connecting rod 516. Second electromagnetic plate; 6. Extrusion assembly; 601. First U-shaped plate; 602. Second rotating rod; 603. Second connecting plate; 604. Electromagnetic guide rod; 605. Second U-shaped plate; 606. Roller; 607. Capsule; 7. Disassembly assembly; 701. Third connecting plate; 702. Triangular groove; 703. Triangular block; 704. Connecting rod; 705. Third spring; 706. Fixing plate; 707. Fourth connecting plate; 708. Third electromagnetic plate; 8. PLC controller. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0021] Example 1, Figure 1 and Figure 7 As shown: A puncture-resistant hemodialysis needle, comprising: Installation sleeve 1 is used to protect the internal puncture needle; Needle tip 4 is slidably connected to the inner wall of mounting sleeve 1; The protective component 5 is disposed opposite to the outer surface of the mounting sleeve 1 along the central axis of the mounting sleeve 1 in the first direction. The protective component 5 is used to cover the needle tip 4 to prevent puncture. The extrusion assembly 6 is disposed inside the mounting sleeve 1 along the first direction, and the extrusion assembly 6 is used for secondary protection of the needle tip 4. A set of protective components 5 includes a protective sleeve 501 and a set of first springs 503. The inner surface of the protective sleeve 501 is slidably connected to a first electromagnetic plate 502. The front end and the end of the set of first springs 503 are fixedly installed on the surfaces of the protective sleeve 501 and the first electromagnetic plate 502, respectively. The protective components 5 use electromagnetic force to make the protective sleeve 501 automatically cover the needle tip 4 without the need for medical personnel to push it, thus preventing the needle tip 4 from being exposed. A set of extrusion components 6 includes a roller 606, an electromagnetic guide rod 604, and a capsule 607. A second U-shaped plate 605 is fixedly installed at the end of the electromagnetic guide rod 604. The roller 606 rotates around the axis of the second U-shaped plate 605. The outer surface of the capsule 607 is adhesively connected to the inner wall of the needle tip 4. The extrusion component 6 compresses air to move the gel flowing out after the capsule 607 is broken to the nozzle of the needle tip 4. After the gel solidifies, it forms a secondary protection. The outer surfaces of both sides of the mounting sleeve 1 are provided with slots 12 near the bottom. One end of the needle tip 4 is fixedly connected to a connecting sleeve 3, and one end of the connecting sleeve 3 is fixedly connected to a needle tube 2. A PLC controller 8 is fixedly installed on the outer surface of the sleeve 1. A set of limiting posts 504 are symmetrically fixedly installed on the outer surface of the first electromagnetic plate 502. The outer surface of the set of limiting posts 504 is slidably connected to the inner wall of the protective sleeve 501. A set of protective components 5 further includes: a serrated strip 507 and a fixing block 511. The outer surface of the serrated strip 507 is fixedly installed on the outer surface of the mounting sleeve 1. Limiting blocks 508 are fixedly installed on both outer surfaces of the serrated strip 507. The limiting blocks 508 are used to limit the movement of the protective sleeve 501. A mounting plate 505 is fixedly installed on the outer surface of the first electromagnetic plate 502. The outer surface of the mounting plate 505 is close to the inner wall of the protective sleeve 501. A microwave dry crushing device 506 is fixedly installed near the center. The microwave dry crushing device 506 is used to crush the capsule 607. A memory metal sheet 509 is fixedly installed on the inner wall of the protective sleeve 501. A second spring 510 is fixedly installed on the outer surface of the protective sleeve 501. An installation block 512 is fixedly connected to the outer surface of the fixing block 511. A first rotating rod 513 is rotatably connected to the inner wall of the installation block 512. A pawl 514 is fixedly connected to the outer surface of the first rotating rod 513. The pawl 514 is used to limit the movement of the protective sleeve 501. A first connecting plate 515 is fixedly connected to the outer surface of the fixing block 511. A second electromagnetic plate 516 is fixedly installed on the outer surface of the connecting plate 515 near the top. The outer surface of the fixing block 511 is fixedly connected to the outer surface of the mounting sleeve 1. The outer surface of the protective sleeve 501 is slidably connected to the outer surface of the mounting sleeve 1. A set of extrusion components 6 further includes a first U-shaped plate 601. A second rotating rod 602 is rotatably connected to the inner wall of the first U-shaped plate 601. A second connecting plate 603 is fixedly connected to the outer surface of the second rotating rod 602. The outer surface of the second connecting plate 603 is fixedly installed to the outer surface of the electromagnetic guide rod 604. The outer surface of the first U-shaped plate 601 is fixedly connected to the inner wall of the mounting sleeve 1.

[0022] The effect achieved by the entire embodiment 1 is as follows: after completing hemodialysis for the patient, the medical staff first needs to remove the needle. At this time, one hand needs to continuously press the puncture point to prevent bleeding after needle removal, while the other hand slowly and steadily pulls the needle tip 4 of the puncture needle out of the patient's puncture site. During the gradual removal of the needle tip 4, the medical staff needs to simultaneously press the PLC controller 8 on the top of the mounting sleeve 1. The PLC controller 8 sends an energizing signal to the second electromagnetic plate 516 on the first connecting plate 515, so that the second electromagnetic plate 516 obtains electrical energy and generates electromagnetic induction. Since the pawl 514 itself is made of electromagnet material, it will interact with the energized second electromagnetic plate 516. The pawl 514 is connected to the mounting block 512 via the first rotating rod 513. The device forms a rotating connection, so under the electromagnetic force of the second electromagnetic plate 516, the pawl 514 will swing directionally around the first rotating rod 513. This swinging motion directly releases the pawl 514 from the pre-compressed and energy-storing second spring 510. When the second spring 510 is freed from the constraint of the pawl 514, its stored elastic potential energy is rapidly released, moving towards the needle tip 4 and pushing the protective sleeve 501 on the outside of the mounting sleeve 1 towards the position of the needle tip 4. During the movement of the protective sleeve 501, the pre-set limiting block 508 in the device will contact the specific mating structure of the protective sleeve 501, strictly limiting the movement trajectory of the protective sleeve 501 and preventing the protective sleeve 501 from moving sideways due to factors such as uneven force. The protective sleeve 501 is shifted towards the needle tip 4 to ensure that it remains precisely close to the needle tip 4. As the protective sleeve 501 continues to advance towards the needle tip 4, the first electromagnetic plate 502, which was originally blocked and limited by the outer surface of the mounting sleeve 1, is gradually exposed. The first electromagnetic plate 502 is pre-connected to the first spring 503, which is in a compressed state. At this time, the first spring 503 is no longer suppressed by the mounting sleeve 1 and releases its elastic force to pop out the first electromagnetic plate 502. During the pop-out process of the first electromagnetic plate 502, the limiting post 504 slides on the inner surface of the protective sleeve 501 to limit the pop-out trajectory and displacement of the first electromagnetic plate 502, preventing the first electromagnetic plate 502 from shifting due to excessive pop-out speed or unstable force, and ensuring that it always moves in the preset direction. When the front end of the protective sleeve 501 moves to be fully aligned with the position of the needle tip 4 that has just been removed, the two opposing first electromagnetic plates 502, due to their magnetic attraction, begin to move towards each other and eventually attract each other, forming a complete and tight cover for the needle tip 4 that has just been removed from the patient's puncture point. It should also be noted that the first electromagnetic plates 502 have pre-drilled slots that are exactly the same width as the needle tip 4. The size design of these slots ensures that the needle tip 4 can be accurately embedded in the slots, further improving the sealing and stability of the cover and preventing partial exposure of the needle tip 4. Throughout the entire process of the protective sleeve 501 moving towards the needle tip 4, the memory metal sheet 509 on the inner surface of the protective sleeve 501 simultaneously contacts the patient's skin.The memory metal sheet 509 is made of nickel-titanium alloy, which has unique temperature-sensitive deformation characteristics. When it comes into contact with human skin at a room temperature of approximately 36-37°C, it will immediately undergo a preset deformation reaction. Specifically, the rear end of the memory metal sheet 509 bends towards the serrated strip 507 and eventually engages with the tooth groove of the serrated strip 507. This engagement structure forms a firm and fixed connection between the protective sleeve 501 and the mounting sleeve 1, effectively preventing the protective sleeve 501 from slipping during subsequent operations, thereby avoiding the needle tip 4 from slipping due to the protective sleeve 501. Upon re-exposed, the needle tip 4 is completely withdrawn from the patient's puncture site, and preliminary full-coverage protection is achieved through the synergistic action of the protective sleeve 501 and the first electromagnetic plate 502. Next, the microwave dry fragmentation device 506, pre-aligned with the capsule 607 inside the needle tip 4, is activated under the further control of the PLC controller 8. The microwave dry fragmentation device 506 above the mounting plate 505 generates microwave energy of a specific frequency, which directly acts on the capsule 607 inside the needle tip 4, efficiently fragmenting the capsule 607 into a gel. Simultaneously, as... Figure 6 As shown, the PLC controller 8 synchronously starts the electromagnetic guide rod 604. The telescopic end of the electromagnetic guide rod 604 extends outward under the action of electromagnetic driving force, pushing the connected second U-shaped plate 605 towards the needle tip 4. The roller 606 installed on the second U-shaped plate 605 moves synchronously with the second U-shaped plate 605, generating a uniform squeezing effect on the rubber connecting sleeve 3, causing the connecting sleeve 3 to undergo adaptive deformation to cooperate with the overall movement. During the extension of the telescopic end of the electromagnetic guide rod 604, under the support of the first U-shaped plate 601, the guidance of the second rotating rod 602, and the second connecting plate 603, the surrounding air is pushed to form a directional airflow. This airflow flows along a preset path towards the needle tip 4, smoothly pushing the broken gel to the nozzle position of the needle tip 4. After a preset period of time, the gel pushed to the nozzle position of the needle tip 4 gradually solidifies under the influence of ambient temperature and air contact, forming... A dense, sealed structure provides secondary protection for the needle tip 4. This secondary protection effectively prevents the risk of needle stick injuries caused by accidental collisions during the subsequent insertion of the needle into the sharps container, ensuring the safety of medical personnel. With the combined action of the protective component 5 and the squeezing component 6, medical personnel do not need to push the protective sleeve 501 with one hand after needle removal. The pre-compressed spring in the protective component 5 has an automatic reset driving force, and the squeezing component 6 can be triggered synchronously during needle removal, eliminating the need for medical personnel to apply additional pushing force. This allows medical personnel to maintain a stable operating posture of removing the needle with one hand and pressing the puncture point with the other. Through double protection, the needle is fully covered from the time it is pulled out of the puncture site until it is inserted into the sharps container, fundamentally preventing medical personnel from being easily stick-injured by minor hand movements or accidental touches when handling the needle, thereby reducing the risk of infection from blood-borne diseases.

[0023] Preferably, following the technical solution described in Embodiment 1 above, to address the issue of the need to disassemble and destroy the syringe 2, a solution is proposed, specifically, as follows: Figure 1 - Figure 2 as well as Figure 8 and Figure 10 As shown: A set of disassembly components 7 is provided on both outer surfaces of the needle tube 2, which facilitates the disassembly of the needle tube 2. A set of disassembly components 7 includes a third connecting plate 701 and a fourth connecting plate 707. The outer surface of the third connecting plate 701 is provided with a triangular groove 702. A triangular block 703 is slidably connected to the inner wall of the triangular groove 702. A connecting rod 704 is fixedly connected to the outer surface of the triangular block 703 near the center. A third spring 705 is provided on the outer surface of the connecting rod 704. A fixing plate 706 is slidably connected to the outer surface of the connecting rod 704. The outer surface of the fixing plate 706 is fixedly connected to the inner wall of the slot 12. A third electromagnetic plate 708 is fixedly installed on the outer surface of the fourth connecting plate 707. The outer surface of the fourth connecting plate 707 is fixedly connected to the outer surface of the fixing block 511. The outer surface of the third connecting plate 701 is fixedly installed on the outer surface of the needle tube 2.

[0024] The overall effect of implementation 2 is as follows: after completing the comprehensive protection of the needle tip 4, medical staff, through the operation of the PLC controller 8, send a power-on command to the third electromagnetic plate 708 installed on the fourth connecting plate 707, causing the third electromagnetic plate 708 to be quickly energized and generate a stable electromagnetic attraction force. It is important to note that the connecting rod 704 corresponding to the third electromagnetic plate 708 is made of electromagnet material and possesses the characteristic of interacting with electromagnetic forces. Therefore, after the third electromagnetic plate 708 is energized and generates an attraction force, it immediately forms a directional attraction effect on the connecting rod 704. Driven by this attraction force, the connecting rod 704 moves linearly along a preset trajectory. One end of the connecting rod 704 is connected to the triangular block 703, and this movement synchronously drives the triangular block 703. As block 703 moves, it eventually causes the triangular block 703, which was originally engaged in the pre-set triangular groove 702 of the third connecting plate 701, to gradually disengage from the limiting position of the triangular groove 702. This disengagement of the triangular block 703 directly releases the limiting and fixing effect on the needle tube 2. Previously, the triangular block 703, through its engagement with the triangular groove 702, formed a stable fixing constraint on the needle tube 2. After disengagement, this constraint disappears, allowing the needle tube 2, the connecting sleeve 3 connected to the needle tube 2, and the protected needle tip 4 to have room to move. Medical personnel can then easily remove the needle tube 2, the connecting sleeve 3, and the needle tip 4 together from the mounting sleeve 1. Since the needle tip 4 was previously tightly covered by the capsule 607, forming a reliable anti-puncture protection structure, the removal and transfer of these components are easier. During the assembly process, the needle tip 4 will not pose a risk of puncture wounds to medical personnel. Subsequently, the medical personnel will accurately place the removed needle tip 4, connecting sleeve 3, and needle tube 2 into a sharps container for centralized storage in accordance with medical waste disposal regulations. At the same time, the remaining protective device will be placed in a dedicated sterilization device, and the sterilization program will be started to perform comprehensive disinfection and sterilization to eliminate potential pathogenic microorganisms and ensure hygiene and safety for subsequent reuse. After the sterilization process is completed, the medical personnel will remove the sterilized protective device and prepare to install a new needle tube 2 for the next hemodialysis operation. At this time, the medical personnel will align the new needle tube 2 with the rear opening of the mounting sleeve 1 in the protective device and smoothly push the new needle tube 2 forward along the mounting sleeve 1. During the process of pushing the new needle tube 2, the first The third connecting plate 701 contacts and compresses the triangular block 703. As the pushing force continues to be applied, the triangular block 703 gradually moves into the preset slot 12 under the compression. At the same time, the pre-set fixing plate 706 in the device forms a contact limit with the side of the triangular block 703, effectively preventing the triangular block 703 from slipping or deviating from the preset trajectory when moving into the slot 12, ensuring that the triangular block 703 always moves along the direction of the slot 12. As the new needle tube 2 continues to advance, the triangular groove 702 on the third connecting plate 701 gradually aligns with the triangular block 703 in the slot 12. When the two are completely aligned, the third spring 705, which was originally in a compressed state, is no longer constrained and quickly releases the stored elastic potential energy.Under the elastic force of the third spring 705, the triangular block 703 is quickly pushed into the triangular groove 702. Through the tight engagement of the triangular block 703 and the triangular groove 702, the third connecting plate 701 is re-securely positioned, thus achieving stable fixation of the new needle tube 2. After the third connecting plate 701 and the needle tube 2 are securely fixed, the assembly and preparation of the entire puncture needle are complete. Medical personnel can then use the assembled puncture needle to perform hemodialysis on patients according to the standard operating procedure. Under the action of the disassembly component 7, the PLC controller 8 can drive the triangular block 703 to detach and release the needle tube 2, separating disposable waste parts from reusable protective devices. This eliminates the need to discard the entire device, and the separation process is tool-free and convenient, reducing wear and tear on reusable parts during disassembly. These protective devices can be sterilized and reused with new puncture needles, thereby reducing not only the cost of consumables per hemodialysis session but also the amount of medical waste generated.

[0025] The working principle of the entire device is as follows: After the patient completes hemodialysis, the medical staff continuously presses the puncture site with one hand to prevent bleeding, and smoothly pulls out the needle tip 4 with the other hand. At the same time, they press the PLC controller 8 on the mounting sleeve 1. The PLC controller 8 sends an energizing signal to the second electromagnetic plate 516. Because the pawl 514 is made of electromagnet, it will swing around the first rotating rod 513 under the action of electromagnetic force, releasing the limit on the second spring 510. The second spring 510 releases elastic potential energy, pushing the protective sleeve 501 to move towards the needle tip 4, and the limiting block 5... 08. To limit its trajectory and prevent deviation, after the protective sleeve 501 moves, the first electromagnetic plate 502, which was previously blocked, loses its pressure. The first spring 503 pushes the first electromagnetic plate 502, and the limiting post 504 controls its trajectory. The two first electromagnetic plates 502 close due to magnetic attraction, tightly covering the needle tip 4 through the reserved groove. At the same time, the memory metal sheet 509 inside the protective sleeve 501 deforms after contacting human skin at 36-37℃, engaging the serrated strip 507 to fix the protective sleeve 501, preventing displacement of the protective sleeve 501 that would expose the needle tip 4. Subsequently, the PLC controller 8 starts the microwave dry crushing equipment 506, crushing the capsule 607 inside the needle tip 4. Simultaneously, the electromagnetic guide rod 604 is activated, its telescopic end pushing the second U-shaped plate 605 and roller 606 to form a directional airflow that pushes the crushed capsule 607 to the nozzle of the needle tip 4. The capsule 607 particles solidify to form a secondary seal. Afterward, medical staff operate the PLC controller 8 to energize the third electromagnetic plate 708, attracting the electromagnet connecting rod 704, which drives the triangular block 703 to detach from the third connecting plate 701. Corner groove 702, release needle tube 2 from fixation, remove needle tube 2, connecting sleeve 3 and needle tip 4 from mounting sleeve 1 and put them into sharps box. The remaining protective device is sterilized. When used next time, push the new needle tube 2 into mounting sleeve 1. The third connecting plate 701 squeezes the triangular block 703 to move towards the slot 12. The fixing plate 706 limits the movement to prevent displacement. After the triangular groove 702 and triangular block 703 are aligned, the third spring 705 pushes the triangular block 703 to engage the triangular groove 702, fixing the new needle tube 2. The assembly is complete and the next hemodialysis can be carried out.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A puncture-resistant hemodialysis needle, characterized in that, include: Installation sleeve (1), which is used to protect the internal puncture needle; The needle tip (4) is slidably connected to the inner wall of the mounting sleeve (1); The protective component (5) is disposed opposite to the outer surface of the mounting sleeve (1) along the central axis of the mounting sleeve (1) in a first direction. The protective component (5) is used to cover the needle tip (4) to prevent puncture. The extrusion assembly (6) is disposed inside the mounting sleeve (1) along a first direction, and the extrusion assembly (6) is used for secondary protection of the needle tip (4); The protective component (5) includes a protective sleeve (501) and a set of first springs (503). The inner wall of the protective sleeve (501) is slidably connected to a first electromagnetic plate (502). The front end and the end of the set of first springs (503) are fixedly installed on the surface of the protective sleeve (501) and the first electromagnetic plate (502) respectively. The protective component (5) uses electromagnetic force to make the protective sleeve (501) automatically cover the needle tip (4) without the need for medical staff to push it, thus avoiding the needle tip (4) from being exposed. A set of the extrusion assembly (6) includes a roller (606), an electromagnetic guide rod (604), and a capsule (607). A second U-shaped plate (605) is fixedly installed at the end of the electromagnetic guide rod (604). The roller (606) rotates around the axis of the second U-shaped plate (605). The outer surface of the capsule (607) is adhesively connected to the inner wall of the needle tip (4). The extrusion assembly (6) extrudes air to move the gel flowing out after the capsule (607) is broken to the nozzle of the needle tip (4). After the gel solidifies, it forms a secondary protection.

2. The anti-puncture hemodialysis puncture needle according to claim 1, characterized in that: The mounting sleeve (1) has slots (12) on both sides of its outer surface near the bottom. One end of the needle tip (4) is fixedly connected to a connecting sleeve (3), and one end of the connecting sleeve (3) is fixedly connected to a needle tube (2). A PLC controller (8) is fixedly installed on the outer surface of the mounting sleeve (1). A set of limiting posts (504) are symmetrically fixedly installed on the outer surface of the first electromagnetic plate (502). The outer surface of the set of limiting posts (504) is slidably connected to the inner wall of the protective sleeve (501).

3. The anti-puncture hemodialysis puncture needle according to claim 1, characterized in that: A set of the protective components (5) further includes: a serrated strip (507) and a fixing block (511). The outer surface of the serrated strip (507) is fixedly installed on the outer surface of the mounting sleeve (1). Limiting blocks (508) are fixedly installed on both outer surfaces of the serrated strip (507). The limiting blocks (508) are used to limit the movement of the protective sleeve (501). An mounting plate (505) is fixedly installed on the outer surface of the first electromagnetic plate (502). A microwave dry crushing device (506) is fixedly installed on the outer surface of the mounting plate (505) near the center. The microwave dry crushing device (506) is used to crush capsules (607).

4. A puncture-resistant hemodialysis needle according to claim 3, characterized in that: The inner wall of the protective sleeve (501) is fixedly fitted with a memory metal sheet (509), the outer surface of the protective sleeve (501) is fixedly fitted with a second spring (510), the outer surface of the fixing block (511) is fixedly connected with an installation block (512), the inner wall of the installation block (512) is rotatably connected with a first rotating rod (513), the outer surface of the first rotating rod (513) is fixedly connected with a pawl (514), and the pawl (514) is used to limit the movement of the protective sleeve (501).

5. A puncture-resistant hemodialysis needle according to claim 4, characterized in that: The outer surface of the fixing block (511) is fixedly connected to a first connecting plate (515), and a second electromagnetic plate (516) is fixedly installed on the outer surface of the first connecting plate (515) near the top. The outer surface of the fixing block (511) is fixedly connected to the outer surface of the mounting sleeve (1), and the outer surface of the protective sleeve (501) is slidably connected to the outer surface of the mounting sleeve (1).

6. A puncture-resistant hemodialysis needle according to claim 1, characterized in that: The extrusion assembly (6) further includes a first U-shaped plate (601), the inner wall of the first U-shaped plate (601) is rotatably connected to a second rotating rod (602), the outer surface of the second rotating rod (602) is fixedly connected to a second connecting plate (603), the outer surface of the second connecting plate (603) is fixedly installed with the outer surface of the electromagnetic guide rod (604), and the outer surface of the first U-shaped plate (601) is fixedly connected to the inner wall of the mounting sleeve (1).

7. A puncture-resistant hemodialysis needle according to claim 2, characterized in that: A set of disassembly components (7) is provided on both outer surfaces of the needle tube (2), and the set of disassembly components (7) facilitates the disassembly of the needle tube (2); A set of the disassembly components (7) includes a third connecting plate (701) and a fourth connecting plate (707). The outer surface of the third connecting plate (701) is provided with a triangular groove (702), and a triangular block (703) is slidably connected to the inner surface wall of the triangular groove (702).

8. A puncture-resistant hemodialysis needle according to claim 7, characterized in that: A connecting rod (704) is fixedly connected to the outer surface of the triangular block (703) near the center. A third spring (705) is provided on the outer surface of the connecting rod (704). A fixing plate (706) is slidably connected to the outer surface of the connecting rod (704).

9. A puncture-resistant hemodialysis needle according to claim 8, characterized in that: The outer surface of the fixing plate (706) is fixedly connected to the inner wall of the slot (12), and the outer surface of the fourth connecting plate (707) is fixedly installed with the third electromagnetic plate (708).

10. A puncture-resistant hemodialysis needle according to claim 9, characterized in that: The outer surface of the fourth connecting plate (707) is fixedly connected to the outer surface of the fixing block (511), and the outer surface of the third connecting plate (701) is fixedly installed to the outer surface of the needle tube (2).

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