Needle withdrawing safety protection device for non-injury needle in infusion port

Abstract

The invention relates to the technical field of medical instruments, in particular to an infusion port non-injury needle withdrawal safety protection device which comprises a notch ring, a supporting rod and a bent rod are fixedly connected to the upper side of the notch ring, a linkage shaft is rotatably arranged in the supporting rod in an up-down sliding mode, and a hook is detachably connected to the lower side of the linkage shaft. A reset mechanism is arranged at the end of the linkage shaft, a pull-out mechanism is arranged between the bent rod and the linkage shaft, a self-locking mechanism is arranged on one side of the bent rod, and a first sliding groove, a second sliding groove and a mounting part are formed in the top of the bent rod; the self-locking mechanism is arranged to be matched with the hook to pull out the needle, linear pull-out of the butterfly wing non-injury needle is facilitated, in the pull-out process, the hand of a medical worker does not need to make contact with the butterfly wing non-injury needle, and therefore the situation that the butterfly wing non-injury needle accidentally hurts the medical worker is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically to a non-destructive needle removal safety protection device for an infusion port. Background Art

[0002] An infusion port is a closed infusion device that is completely implanted in the human body. It can be implanted subcutaneously and left in place for a long time. As a device for intravenous infusion in the body, a non-destructive butterfly needle is inserted through the skin into the injection seat to directly deliver the drug solution to the superior vena cava.

[0003] Publication No. CN116850377A discloses a safety protection device for removing needles without damage to infusion ports, comprising: a main support, the main support comprises a main cross bar, parallel bars are fixed at both ends of the main cross bar, a support bar is fixed at one end of the parallel bar away from the main cross bar, each support bar is provided with a T-shaped slide, and a vertical groove connected to the T-shaped slide is provided on the parallel bar; two slide plates, the two slide plates are respectively installed in two T-shaped slides, the slide plates are provided with mounting grooves with openings facing upward, and a fixing rod is fixed on the bottom surface of the mounting groove; two lifting plates, the two lifting plates are respectively installed in two mounting grooves, and the lifting plates are provided with lifting holes for the fixing rods to pass through; a lifting device, the lifting device is used to drive the two lifting plates to move upward. The present invention can drive the slide plate to move by rotating the lifting screw, and can also drive the lifting plate to move upward after driving the slide plate to move. Only one lifting screw needs to be rotated to pull out the butterfly wing without damage needle, and the operation is very convenient.

[0004] When removing the butterfly-wing non-destructive needle after the patient's treatment, one hand is required to fix the injection seat and the other hand to remove the needle. Due to the large resistance and inertia of the injection seat, it is very difficult to manually pull it out. The needle is prone to rebound, causing the needle track to deviate, which may cause damage to the patient's skin and the medical staff's hands, and easily cause cross infection to the medical staff. Although ordinary needle removal is convenient, it is easy to squeeze the infusion port and cause unnecessary damage, and it is not suitable for one-handed operation. For this reason, we propose an infusion port non-destructive needle removal safety protection device. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a non-destructive needle removal safety protection device for an infusion port to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solutions: a non-destructive needle removal safety protection device for an infusion port, comprising a gap ring, a support rod and a curved rod are fixedly connected to the upper side of the gap ring, a linkage shaft is provided in the support rod for sliding up and down and rotating, a curved hook is detachably connected to the lower side of the linkage shaft, a reset mechanism is provided at the end of the linkage shaft, a removal mechanism is provided between the curved rod and the linkage shaft, a self-locking mechanism is provided on one side of the curved rod, and a first slide groove, a second slide groove and a mounting portion are provided on the top of the curved rod;

[0007] The pulling mechanism includes a rack, an ear shaft and a spur gear. The upper end of the rack is slidably connected to the first slide groove, the second slide groove is fixedly connected to the lower end of the rack, the linkage shaft passes through the ear shaft, the spur gear is rotatably connected to the mounting portion, and the rack is meshed with the spur gear.

[0008] Furthermore, both sides of the support rod are provided with sliding grooves, and sliding blocks are slidably connected in the two sliding grooves. The linkage shaft is rotatably connected between the two sliding blocks and extends to both sides.

[0009] Furthermore, a reinforcement sleeve is fixedly connected to the circumferential surface of the linkage shaft, a lower needle rod is fixedly connected to the bottom of the reinforcement sleeve via an easy-to-tighten bolt, and a lower end of the lower needle rod is fixedly connected to a curved hook.

[0010] Furthermore, the reset mechanism includes a limit plate, a first lever, a mounting groove, an arc rod, a first spring and a push plate, the limit plate is fixedly connected to the outer side of one of the support rods, the first lever is connected to one end of the linkage shaft, the push plate is fixedly connected to the other end of the linkage shaft, a mounting groove is provided in the limit plate, the push plate is located in the mounting groove, the arc rod is fixedly connected to the inner wall of the mounting groove, the first spring is sleeved on the surface of the arc rod, and the push plate is slidably connected to the surface of the arc rod.

[0011] Furthermore, the self-locking mechanism includes a ratchet, a pawl, a second lever and a third spring, the ratchet is fixedly connected to one end of the axis of the spur gear, the pawl is rotatably connected to one side of the curved rod, the ratchet is meshed with the pawl, the second lever is fixedly connected to the upper side of the pawl, and the third spring is fixedly connected between the lower side of the pawl and the side of the curved rod.

[0012] Furthermore, a straight rod is fixedly connected to the upper side of the ear shaft, the upper end of the straight rod is slidably connected to the second sliding groove, and the circumferential surface of the straight rod is sleeved with a second spring.

[0013] Furthermore, a handle is installed on the surface of the bent rod, and the spur gear is exposed outside the mounting portion.

[0014] Furthermore, the notched ring, support rod, curved rod and curved hook are all made of stainless steel, and the diameter of the notched ring is 7-15 cm.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention is conducive to the straight-line extraction of the butterfly-wing non-damage needle by providing a self-locking mechanism in conjunction with the curved hook for needle extraction. During the extraction process, the medical staff's hands do not need to touch the butterfly-wing non-damage needle, thereby avoiding accidental injury to the medical staff by the butterfly-wing non-damage needle. The pawl is used to block the rotation of the ratchet wheel, thereby blocking the rack from moving downward, thereby automatically locking the position of the rack after moving upward, ensuring that the needle will not fall back when being extracted, thereby improving the stability and safety of needle extraction, and being able to adjust the initial height of the rack, that is, the initial position of the curved hook, to adapt to lower needle rods of different lengths, thereby expanding the scope of use.

[0017] 2. The present invention provides a notch ring with a notch position corresponding to the catheter position of the infusion port, thereby avoiding squeezing of the catheter, preventing the catheter from being blocked or damaged, affecting the normal infusion of the drug, and ensuring the safety of the patient's medication.

[0018] 3. The present invention is provided with a design control structure, the first lever and the spur gear are located close to the spur gear, which is conducive to direct operation by the thumb, convenient for medical staff to use with one hand, simple and efficient and more in line with practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a side structural schematic diagram of the present invention.

[0021] Figure 3 It is a cross-sectional structural schematic diagram of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the hook of the present invention.

[0023] Figure 5 It is a schematic diagram of the reset mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the rack structure of the present invention.

[0025] Figure 7 It is a schematic diagram of the bending rod structure of the present invention.

[0026] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at point A.

[0027] The accompanying drawings are marked as follows: 1. notched ring; 2. support rod; 201. slide groove; 202. slider; 3. linkage shaft; 4. hook; 401. lower needle rod; 402. reinforcement sleeve; 5. reset mechanism; 501. limit plate; 502. first lever; 503. mounting groove; 504. arc rod; 505. first spring; 506. push piece; 6. bent rod; 601. first slide groove; 602. second slide groove; 603. mounting portion; 604. handle; 7. extraction mechanism; 701. rack; 702. ear shaft; 703. spur gear; 8. straight rod; 801. second spring; 9. self-locking mechanism; 901. ratchet; 902. pawl; 903. second lever; 904. third spring. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The non-destructive needle removal safety protection device for an infusion port involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Reference Figure 1-Figure 8 The present invention provides a non-destructive needle removal safety protection device for an infusion port, comprising a notch ring 1, a support rod 2 and a curved rod 6 are fixedly connected to the upper side of the notch ring 1, a linkage shaft 3 is provided in the support rod 2 to slide up and down and rotate, a curved hook 4 is detachably connected to the lower side of the linkage shaft 3, a reset mechanism 5 is provided at the end of the linkage shaft 3, a removal mechanism 7 is provided between the curved rod 6 and the linkage shaft 3, a self-locking mechanism 9 is provided on one side of the curved rod 6, and a first slide groove 601, a second slide groove 602 and a mounting portion 603 are provided on the top of the curved rod 6;

[0030] The pulling mechanism 7 includes a rack 701, an ear shaft 702 and a spur gear 703. The upper end of the rack 701 is slidably connected to the first slide groove 601, and the second slide groove 602 is fixedly connected to the lower end of the rack 701. The linkage shaft 3 passes through the ear shaft 702, and the spur gear 703 is rotatably connected to the mounting portion 603, and the rack 701 is meshed with the spur gear 703.

[0031] In this embodiment, it is necessary to specifically explain that: the notch ring 1 is an annular structure, and the notch position corresponds to the catheter position of the infusion port, so as to avoid squeezing the catheter, prevent the catheter from being blocked or damaged, affect the normal infusion of the drug, and ensure the safety of the patient's medication. The slider 202 is used to support the linkage shaft 3 to rotate and move up and down. The hook 4 is used to pull out the butterfly wing non-damage needle. The hook 4 adopts a commonly used forked structure and can be inserted into the needle position of the butterfly wing non-damage needle. The reset mechanism 5 is used to rotate the position of the hook 4 and control the hook 4 to automatically reset. When in use, the notch ring 1 is placed around the infusion port, and then the linkage shaft is rotated by toggling the first lever 502. 3. The linkage shaft 3 drives the reinforcement sleeve 402 to rotate, and finally rotates to adjust the position of the curved hook 4 so that the curved hook 4 is close to the needle position of the butterfly-wing non-damage needle, and then the first lever 502 is released. Under the reset effect of the reset mechanism 5, the needle position of the butterfly-wing non-damage needle is automatically inserted. At this time, the extraction mechanism 7 controls the curved hook 4 to move upward in a straight line, so as to extract the butterfly-wing non-damage needle. During the extraction process, the medical staff's hands do not need to touch the butterfly-wing non-damage needle, thereby avoiding accidental injury to the medical staff by the butterfly-wing non-damage needle. Moreover, the notch ring 1 is located at the position of the infusion port, which will not cause squeezing to the infusion port, thereby ensuring the normal function of the infusion port and the safety of the patient.

[0032] The main difference between the present embodiment and the prior art is that the present embodiment adopts the pull-out mechanism 7 and the self-locking mechanism 9 to be used with one hand. Specifically, when working, the medical staff holds the curved rod 6 with one hand, and the pull-out mechanism 7 corresponds to the thumb position of the medical staff. After the curved hook 4 is inserted into the needle position of the butterfly-wing non-damage needle, the spur gear 703 is rotated by the thumb, and the spur gear 703 drives the rack 701 to move upward, the rack 701 drives the ear shaft 702 to move upward, the ear shaft 702 drives the linkage shaft 3 to move upward, and finally drives the reinforcement sleeve 402, the lower needle rod 401 and the curved hook 4 to move upward synchronously, so as to realize the straight-line pull-out of the butterfly-wing non-damage needle without touching the butterfly-wing non-damage needle, and the self-locking mechanism 9 is designed to be used in conjunction with the pull-out mechanism 7, and the ratchet 901 follows the spur gear When the wheel 703 rotates, the ratchet 901 can rotate normally when the rack 701 moves upward. When the rack 701 moves downward, the pawl 902 is used to block the ratchet 901 from rotating, thereby blocking the rack 701 from moving downward, and automatically locking the position of the rack 701 after it moves upward, ensuring that the needle will not fall back when it is pulled out, improving the stability and safety of the needle pulling out, and the second lever 903 can unlock the self-locking of the pawl 902, and the ratchet 901 and the spur gear 703 can rotate in the opposite direction. At this time, the rack 701 is reset under the elastic action of the second spring 801. The design of the control structure first lever 502 and the spur gear 703 are close to the spur gear 703, which is conducive to direct operation by the thumb, convenient for medical staff to use with one hand, simple and efficient, and more in line with practical use.

[0033] The above structure is the main structure of this embodiment, which solves the problem of accidentally injuring medical staff when pulling out the needle, and the curved hook 4 is an existing structure. The specific structure and connection method of the curved hook 4 for pulling out the butterfly wing without damaging the needle are not described in detail in this embodiment. In addition, the self-locking of the self-locking mechanism 9 also belongs to the existing technology. Therefore, this application does not make detailed limitations.

[0034] Reference Figure 3-4 A slide groove 201 is provided on both sides of the support rod 2, and a slider 202 is slidably connected in the two slide grooves 201. The linkage shaft 3 is rotatably connected between the two sliders 202 and extends to both sides.

[0035] In this embodiment, it needs to be specifically explained that: the slide groove 201 is used to limit the linear sliding of the slider 202 up and down, the slider 202 is used to support the rotation of the linkage shaft 3, and at the same time the linkage shaft 3 can follow the slider 202 to move linearly up and down. The limit plate 501 is fixed to one of the sliders 202, and the limit plate 501 and the first lever 502 are located at different ends of the linkage shaft 3.

[0036] Reference Figure 3 The circumferential surface of the linkage shaft 3 is fixedly connected with a reinforcement sleeve 402 , the bottom of the reinforcement sleeve 402 is fixedly connected with a lower needle rod 401 through an easy-to-tighten bolt, and the lower end of the lower needle rod 401 is fixedly connected to the hook 4 .

[0037] In this embodiment, it should be specifically explained that: the curved hook 4 and the lower needle rod 401 are an integral structure. During assembly, the lower needle rod 401 is inserted into the lower end of the reinforcing sleeve 402, and then the position of the lower needle rod 401 is fixed by an easy-to-tighten bolt. The butterfly wing non-damage needle models are different, and their sizes including diameter and length are usually different. The present solution designs a detachable curved hook 4, and different sizes of curved hooks 4 can be selected according to actual conditions to ensure that needle removal is safer and more stable.

[0038] Reference Figure 4-5 The reset mechanism 5 includes a limit plate 501, a first lever 502, a mounting groove 503, an arc rod 504, a first spring 505 and a push piece 506. The limit plate 501 is fixedly connected to the outer side of one of the support rods 2, the first lever 502 is connected to one end of the linkage shaft 3, the push piece 506 is fixedly connected to the other end of the linkage shaft 3, a mounting groove 503 is opened in the limit plate 501, the push piece 506 is located in the mounting groove 503, the arc rod 504 is fixedly connected to the inner wall of the mounting groove 503, the first spring 505 is sleeved on the surface of the arc rod 504, and the push piece 506 is slidably connected to the surface of the arc rod 504.

[0039] In this embodiment, it should be specifically explained that: the arc rod 504, the first spring 505 and the push piece 506 are all located in the installation groove 503, the arc rod 504 is a semi-annular structure, the limit plate 501 and the first lever 502 are located at different ends of the linkage shaft 3, and the first lever 502 can be driven to drive the linkage shaft 3 to rotate slightly when the linkage shaft 3 rotates. The push piece 506 rotates along the surface of the arc rod 504, thereby squeezing the first spring 505 into a compressed state. After the first lever 502 is released, the push piece 506 returns to its original position under the elastic action of the first spring 505, and finally drives the linkage shaft 3 and the hook 4 back to their original positions, thereby realizing the effect of automatic resetting, so that the hook 4 can be inserted into the needle tip position of the butterfly wing without damaging the needle, thereby helping to remove the needle more easily.

[0040] Reference Figure 7-8 The self-locking mechanism includes a ratchet 901, a pawl 902, a second lever 903 and a third spring 904. The ratchet 901 is fixedly connected to one end of the axis of the spur gear 703, the pawl 902 is rotatably connected to one side of the curved rod 6, the ratchet 901 is meshed with the pawl 902, the second lever 903 is fixedly connected to the upper side of the pawl 902, and the third spring 904 is fixedly connected between the lower side of the pawl 902 and the side of the curved rod 6.

[0041] In this embodiment, it should be specifically explained that the ratchet 901 is fixed to the spur gear 703, and the ratchet 901 rotates synchronously when the spur gear 703 rotates, and the pawl 902 is used to limit the clockwise rotation. Figure 8 For example, the rack 701 is blocked from descending, and the second lever 903 is used to unlock the self-locking, and the pawl 902 is deflected by moving the second lever 903, and the pawl 902 is separated from the ratchet 901. At this time, the spur gear 703 can rotate forwards and backwards, and the rack 701 can move up and down. After releasing the second lever 903, under the elastic action of the third spring 904, the pawl 902 re-engages with the ratchet 901 and automatically resets. The self-locking properties of the ratchet 901 and the pawl 902 are utilized to automatically lock the position of the rack 701 after it moves upward, ensuring that it will not fall back when the needle is pulled out, thereby improving the stability and safety of the needle pulling out, and the initial height of the rack 701, that is, the initial position of the hook 4, can be adjusted to adapt to lower needle rods 401 of different lengths, thereby expanding the scope of use.

[0042] Reference Figure 4 A straight rod 8 is fixedly connected to the upper side of the ear shaft 702 , and the upper end of the straight rod 8 is slidably connected to the second sliding groove 602 . A second spring 801 is sleeved on the circumferential surface of the straight rod 8 .

[0043] In this embodiment, it should be specifically explained that: the second spring 801 moves up and down with the rack 701, the upper end of the straight rod 8 is located on the upper side of the curved rod 6, and the design of the second spring 801 is that after the needle is pulled out, the second spring 801 is in a compressed state due to the upward movement of the ear shaft 702. After the second lever 903 is pushed to unlock the self-locking, under the elastic action of the second spring 801, the rack 701, the ear shaft 702, the linkage shaft 3 and the curved hook 4 return to their original positions, without the need for manual adjustment, and the structural linkage operation is simplified.

[0044] Reference Figure 7 A handle 604 is installed on the surface of the curved rod 6, and the spur gear 703 is exposed outside the mounting portion 603.

[0045] In this embodiment, it should be specifically explained that: the handle 604 is tilted, which is more suitable for one-handed holding and convenient for medical staff to use with one hand. The spur gear 703 is located close to the handle 604, which is convenient for the thumb to directly turn it. The sophisticated structure is conducive to the actual use of medical staff.

[0046] Reference Figure 4 The notch ring 1, the support rod 2, the curved rod 6 and the curved hook 4 are all made of stainless steel, and the diameter of the notch ring 1 is 7-15 cm.

[0047] In this embodiment, it should be specifically explained that the diameter of the infusion port mainly includes the diameter of the infusion seat, also known as the infusion port body, and the diameter of the catheter port. The diameter of the infusion seat is usually larger, with a bottom diameter of about cm and a top diameter of about cm. The notch ring 1 with a diameter of 7-15 cm is designed to have a sufficient safety distance from the infusion port to avoid accidents caused by squeezing. In addition, stainless steel has excellent corrosion resistance and antibacterial properties and will not be damaged or deteriorated due to these contacts. Its antibacterial properties help reduce the risk of cross infection and ensure the safety of patients. The strength and durability of stainless steel are also very suitable for medical devices. It can be reused after cleaning and can be used for a long time without frequent replacement, thereby reducing medical costs.

[0048] Working principle of the present invention:

[0049] The main problem solved by this embodiment is: controlling the lifting of the hook 4 by the extraction mechanism 7 to assist in extracting the butterfly-wing non-damage needle, which is beneficial for medical staff to avoid touching the butterfly-wing non-damage needle with their hands, and solves the problem of the butterfly-wing non-damage needle accidentally injuring medical staff. The position of the self-locking hook 4 of the self-locking mechanism 9 is designed to automatically lock the position of the rack 701 after it moves upward, ensuring that the needle will not fall back when being extracted, improving the stability and safety of the needle extraction, and solving the problem of unexpected needle extraction situations. The control structure is designed so that the first lever 502 and the spur gear 703 are located close to the spur gear 703, which is beneficial for direct operation by the thumb and convenient for medical staff to use with one hand.

[0050] The specific steps are as follows: place the notch ring 1 around the infusion port, with the notch position corresponding to the position of the catheter, then turn the first lever 502 to drive the linkage shaft 3 to rotate slightly, and the linkage shaft 3 drives the push piece 506 and the reinforcement sleeve 402 to rotate synchronously. At this time, the arc rod 504 is in a compressed state, and the lower needle rod 401 and the curved hook 4 follow the deflection of the reinforcement sleeve 402, so that the position of the curved hook 4 is close to the needle head position of the butterfly wing non-damage needle, and then release the first lever 502, and the push piece 506 returns to its original position under the elastic action of the arc rod 504, and the linkage shaft 3, the reinforcement sleeve 402 and the first lever 502 are reset, thereby driving the curved hook 4 to insert into the needle head position of the butterfly wing non-damage needle, at this time, turn the spur gear 703 to rotate, and the spur gear 703 drives the rack 701 to move upward, and the ear shaft 702, the linkage shaft 3, the reinforcement sleeve 402, the lower needle rod 401 and the curved hook 4 follow the rack 701 to move upward, so as to realize the removal of the butterfly wing non-damage needle.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A non-destructive needle removal safety protection device for an infusion port, comprising a gap ring (1), characterized in that: The upper side of the notch ring (1) is fixedly connected with a support rod (2) and a bent rod (6); a linkage shaft (3) is provided in the support rod (2) so as to slide up and down and rotate; a bent hook (4) is detachably connected to the lower side of the linkage shaft (3); a reset mechanism (5) is provided at the end of the linkage shaft (3); a pull-out mechanism (7) is provided between the bent rod (6) and the linkage shaft (3); a self-locking mechanism (9) is provided on one side of the bent rod (6); and a first slide groove (601), a second slide groove (602) and a mounting portion (603) are provided at the top of the bent rod (6); The extraction mechanism (7) comprises a rack (701), an ear shaft (702) and a spur gear (703); the upper end of the rack (701) is slidably connected to the first slide groove (601); the second slide groove (602) is fixedly connected to the lower end of the rack (701); the linkage shaft (3) passes through the ear shaft (702); the spur gear (703) is rotatably connected to the mounting portion (603); and the rack (701) is meshed with the spur gear (703).

2. The infusion port non-destructive needle removal safety protection device according to claim 1, characterized in that: Slide grooves (201) are provided on both sides of the support rod (2), and sliders (202) are slidably connected in the two slide grooves (201). The linkage shaft (3) is rotatably connected between the two sliders (202) and extends to both sides.

3. The infusion port non-destructive needle removal safety protection device according to claim 1, characterized in that: A reinforcing sleeve (402) is fixedly connected to the circumferential surface of the linkage shaft (3), a lower needle rod (401) is fixedly connected to the bottom of the reinforcing sleeve (402) via an easy-to-tighten bolt, and the lower end of the lower needle rod (401) is fixedly connected to the hook (4).

4. The infusion port non-destructive needle removal safety protection device according to claim 1, characterized in that: The reset mechanism (5) comprises a limit plate (501), a first lever (502), a mounting groove (503), an arc rod (504), a first spring (505) and a push piece (506); the limit plate (501) is fixedly connected to the outer side of one of the support rods (2); the first lever (502) is connected to one end of the linkage shaft (3); the push piece (506) is fixedly connected to the other end of the linkage shaft (3); a mounting groove (503) is provided in the limit plate (501); the push piece (506) is located in the mounting groove (503); the arc rod (504) is fixedly connected to the inner wall of the mounting groove (503); the first spring (505) is sleeved on the surface of the arc rod (504); and the push piece (506) is slidably connected to the surface of the arc rod (504).

5. The infusion port non-destructive needle removal safety protection device according to claim 1, characterized in that: The self-locking mechanism comprises a ratchet (901), a pawl (902), a second lever (903) and a third spring (904); the ratchet (901) is fixedly connected to one end of the axis of the spur gear (703); the pawl (902) is rotatably connected to one side of the curved rod (6); the ratchet (901) is meshed with the pawl (902); the second lever (903) is fixedly connected to the upper side of the pawl (902); and the third spring (904) is fixedly connected between the lower side of the pawl (902) and the side of the curved rod (6).

6. The infusion port non-destructive needle removal safety protection device according to claim 1, characterized in that: A straight rod (8) is fixedly connected to the upper side of the ear shaft (702), the upper end of the straight rod (8) is slidably connected to the second sliding groove (602), and a second spring (801) is sleeved on the circumferential surface of the straight rod (8).

7. The infusion port non-destructive needle removal safety protection device according to claim 1, characterized in that: A handle (604) is installed on the surface of the curved rod (6), and the spur gear (703) is exposed outside the installation portion (603).

8. The infusion port non-destructive needle removal safety protection device according to claim 1, characterized in that: The notched ring (1), the support rod (2), the bent rod (6) and the bent hook (4) are all made of stainless steel. The diameter of the notched ring (1) is 7-15 cm.

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