A PICC catheter placement stent that can prevent catheter displacement

Abstract

This invention discloses a PICC catheter insertion frame that can prevent catheter displacement. It includes a first fixing sleeve, a second fixing sleeve rotatably connected to the first fixing sleeve, a telescopic mechanism on the first fixing sleeve, a self-locking mechanism, a first sliding groove, a support mechanism, and a universal ball joint on the telescopic mechanism, a support mechanism slidably connected within the first sliding groove, a guide plate rotatably connected to the support mechanism, a lifting mechanism between the telescopic mechanism and the guide plate, and an abdominal pressure mechanism, a guide ring, and a sterilization mechanism within the guide plate. The catheter insertion frame of this invention can effectively change the angle and position of the catheter insertion, preventing foreign objects from entering the body during insertion, reducing secondary injury to the patient, and further improving the practicality of the device.

Description

Technical Field

[0001] This invention relates to a catheter placement frame, and more particularly to a PICC catheter placement frame that can prevent catheter displacement. Background Technology

[0002] Peripherally inserted central venous catheter (PICC) is a deep vein catheterization technique that is inserted from a peripheral vein and terminates in a central vein. It is suitable for medium- to long-term intravenous infusion, tumor chemotherapy, parenteral nutrition, and infusion for elderly patients, providing patients with medium- to long-term intravenous infusion therapy. Therefore, the PICC catheter will remain in the patient's body for a long time, usually from 7 days to 1 year. PICC catheters are mostly inserted through veins in the patient's upper limb. After insertion, the tip of the PICC catheter is located in the superior vena cava. During insertion, the PICC catheter is encased in a shell, which needs to be peeled off beforehand. This peeling increases the risk of infection. Therefore, a technical solution was disclosed in patent number CN202011082035.6 to solve the above problems. However, this technical solution still has some problems in use. This technical solution can cut the material and then insert the catheter into the human body. However, in use, the device is fixed to the arm. The upper cutting components and placement components are relatively fixed to the arm, so the angle and tilt of the device cannot be changed when the catheter is inserted into the human body. This can cause the catheter to tilt or shift during placement because the tilt and height cannot be adjusted, affecting the stability of the catheter during placement, increasing the patient's pain, and affecting the subsequent treatment effect.

[0003] Based on this, the present invention designs a PICC catheter placement frame that can avoid catheter displacement, in order to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a PICC catheter placement frame that can prevent catheter displacement, thereby solving the problem mentioned in the background art that the placement angle cannot be adjusted during catheter placement, which leads to increased pain for the patient and affects subsequent catheter treatment.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A PICC catheter insertion frame that can prevent catheter displacement includes a first fixing sleeve, a second fixing sleeve rotatably connected to the first fixing sleeve, a telescopic mechanism on the first fixing sleeve, a self-locking mechanism on the telescopic mechanism, a universal ball rotatably connected to the telescopic mechanism, a first sliding groove on the telescopic mechanism, a support mechanism on the telescopic mechanism, the support mechanism being slidably connected within the first sliding groove, a guide plate rotatably connected to the support mechanism, a lifting mechanism between the telescopic mechanism and the guide plate, an abdominal pressure mechanism within the guide plate, a guide ring within the guide plate, and a sterilization mechanism on the guide ring.

[0007] As a further embodiment of the present invention, two torsion springs are provided between the first fixing sleeve and the second fixing sleeve, the torsion springs are located on both sides of the second fixing sleeve, and a rubber skin-friendly layer is provided on the inner side of both the first fixing sleeve and the second fixing sleeve.

[0008] As a further embodiment of the present invention, the telescopic mechanism includes a fixed rod, a first spring, and a sliding sleeve. The fixed rod is fixedly connected to the first fixed sleeve. Two first springs are fixedly connected to one end of the fixed rod. The sliding sleeve is fixedly connected between the two first springs. The sliding sleeve is slidably connected to the fixed rod. The universal ball is rotatably connected to the fixed rod. The first groove is formed on the sliding sleeve.

[0009] As a further embodiment of the present invention, the self-locking mechanism includes a second spring, a locking block, and a locking groove. The second spring is fixedly connected to both sides of the fixed rod. A locking block is installed at one end of the second spring. The surface of the locking block is arc-shaped. Multiple locking grooves are opened on both sides of the sliding sleeve. The locking block is movably connected in the locking groove. Track grooves are provided between the multiple locking grooves.

[0010] As a further embodiment of the present invention, the support mechanism includes a vertical rod, an arc-shaped plate, an arc-shaped groove, and a support rod. The vertical rod is slidably connected in the first groove. The vertical rod is provided with two other self-locking mechanisms. The locking grooves of the self-locking mechanisms are opened on both sides of the inner wall of the first groove. The arc-shaped plate is slidably connected in the vertical rod. The bottom surface of the arc-shaped plate is provided with an arc-shaped groove. The locking grooves of the other self-locking mechanism are opened on both sides of the inner wall of the arc-shaped groove. The support rod is fixedly connected in the arc-shaped plate.

[0011] As a further embodiment of the present invention, the lifting mechanism includes a base, a sliding seat, a hydraulic rod, a vertical groove and a horizontal groove. The base is mounted on the universal ball. The bottom surface of the guide plate has a vertical groove and multiple horizontal grooves. The multiple horizontal grooves are located on both sides of the vertical groove. A sliding seat is slidably connected in the vertical groove. Another self-locking mechanism is provided on the sliding seat. The locking groove in the self-locking mechanism is opened on both sides of the inner wall of the horizontal groove. A hydraulic rod is rotatably connected between the base and the sliding seat.

[0012] As a further embodiment of the present invention, the abdominal pressure mechanism includes an abdominal pressure wheel, a fixed frame and blades. Two abdominal pressure wheels are rotatably connected inside the guide plate, and a fixed frame is fixedly connected inside the guide plate. Two blades are installed inside the fixed frame, and the two blades are installed opposite to each other.

[0013] As a further embodiment of the present invention, the disinfection mechanism includes a disinfection box, a pump and a delivery pipe. The disinfection box is provided on one side of the first fixed sleeve, the pump is installed on the disinfection box, the delivery pipe is provided between the pump and the guide ring, and the guide ring is provided with a sponge soft layer.

[0014] This invention, through the coordinated operation of the lifting and supporting mechanisms, allows for adjustments to the angle and position of the catheter insertion according to the patient's needs. This avoids the increased pain caused by a fixed insertion position, which prevents the catheter from being adjusted and thus enhances the device's practicality and ease of use. Simultaneously, the coordinated components of the abdominal pressure and sterilization mechanisms enable the device to effectively break open the catheter's outer sheath during operation, eliminating the need for manual breaking and increasing efficiency. During insertion, the sterilization mechanism effectively disinfects and wipes the catheter, ensuring its cleanliness and preventing secondary infections caused by dust and foreign matter, thus further improving the device's safety. Attached Figure Description

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the top view of a PICC catheter placement frame that can prevent catheter displacement according to the present invention.

[0017] Figure 2 This is a schematic diagram of the lower side view of a PICC catheter placement frame that can prevent catheter displacement according to the present invention.

[0018] Figure 3 This is a partial frontal view of the internal structure of a PICC catheter placement frame that can prevent catheter displacement according to the present invention.

[0019] Figure 4 This is a partial lower side view of the internal structure of a PICC catheter placement frame that can prevent catheter displacement according to the present invention.

[0020] Figure 5This is a partial right-side view structural diagram of a PICC catheter placement frame that can prevent catheter displacement according to the present invention.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] 1. First fixed sleeve; 2. Second fixed sleeve; 3. Torsion spring; 4. Telescopic mechanism; 5. Fixed rod; 6. First spring; 7. Sliding sleeve; 8. Self-locking mechanism; 9. Second spring; 10. Locking block; 11. Locking groove; 12. Universal ball; 13. First sliding groove; 14. Support mechanism; 15. Upright pole; 16. Arc plate; 17. Arc groove; 18. Support rod; 19. Guide plate; 20. Lifting mechanism; 21. Base; 22. Sliding seat; 23. Hydraulic rod; 24. Vertical groove; 25. Horizontal groove; 26. Abdominal pressure mechanism; 27. Abdominal pressure wheel; 28. Fixed frame; 29. ​​Blade; 30. Guide ring; 31. Disinfection mechanism; 32. Disinfection box; 33. Pump; 34. Delivery pipe. Detailed Implementation

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] Please see Figure 1-Figure 5 This invention provides a technical solution: a PICC catheter placement frame that can prevent catheter displacement. A preferred embodiment includes a first fixing sleeve 1, a second fixing sleeve 2 rotatably connected to the first fixing sleeve 1, a telescopic mechanism 4 on the first fixing sleeve 1, a self-locking mechanism 8 on the telescopic mechanism 4, a universal ball joint 12 rotatably connected to the telescopic mechanism 4, a first sliding groove 13 on the telescopic mechanism 4, a support mechanism 14 on the telescopic mechanism 4, the support mechanism 14 slidably connected within the first sliding groove 13, a guide plate 19 rotatably connected to the support mechanism 14, a lifting mechanism 20 between the telescopic mechanism 4 and the guide plate 19, an abdominal pressure mechanism 26 within the guide plate 19, a guide ring 30 within the guide plate 19, and a disinfection mechanism 31 on the guide ring 30.

[0025] During operation, the first fixing sleeve 1 and the second fixing sleeve 2 are wrapped around the patient's arm, and the telescopic mechanism 4 is pulled to adapt to the length of the patient's arm, thereby positioning the catheter in the patient's armpit. The device is then adjusted according to the angle at which the catheter enters the patient's body. When the lifting mechanism 20 is adjusted, it lifts the guide plate 19, causing it to rotate on the support mechanism 14, tilting the guide plate 19 and thus changing the angle at which the catheter enters the patient's body. When the catheter needs to change its lateral position, the support mechanism 14 can be pushed, causing it to slide in the first groove 13. At this time, the lifting mechanism 20 at one end of the guide plate 19 rotates on the universal ball 12, causing the guide plate 19 to be tilted relative to the telescopic mechanism 4, thereby changing the catheter's insertion position.

[0026] When the position of the catheter insertion needs to be changed, the guide plate 19 can be rotated with the help of the lifting mechanism, so that the guide plate 19 rotates in an arc with the upright rod 15 in the support mechanism 14 as the fulcrum, thereby changing the current position of the equipment. When the catheter is inserted, the disinfection mechanism 31 can be opened to flush the guide ring 30 with disinfectant to wipe the catheter, thereby avoiding the presence of a large number of bacteria and dust on the surface of the catheter.

[0027] This invention, through the cooperation of the lifting mechanism 20 and the supporting mechanism 14 in the device, allows the angle and position of the catheter insertion to be changed according to the patient's needs during use. This avoids the increased pain caused by the catheter's fixed insertion position, which prevents adjustment of its angle and position. This further improves the practicality and ease of use of the device. During installation, the cooperation of the telescopic mechanism 4, the first fixing sleeve 1, and the second fixing sleeve 2 allows the device to be adjusted according to the patient's arm length. This prevents the device from being unable to fully unfold due to the patient's arm being too short or too long, thus affecting the insertion of the catheter. The cooperation of the various parts in the device allows for sufficient adjustment of the insertion angle, position, and inclination when supporting and guiding the catheter, ensuring the ease of use of the catheter and reducing secondary injury to the patient.

[0028] The components in the abdominal pressure mechanism 26 and the disinfection mechanism 31 work together to allow the device to fully open the outer skin of the catheter during operation, thereby avoiding manual opening and increasing the efficiency of opening. During the insertion of the catheter, the components in the disinfection mechanism 31 effectively disinfect and wipe the catheter to ensure its cleanliness and prevent the catheter from containing a large amount of dust and foreign objects, which could cause secondary infection in the patient, thus further improving the safety of the device.

[0029] As a further embodiment of the present invention, two torsion springs 3 are provided between the first fixing sleeve 1 and the second fixing sleeve 2. The torsion springs 3 are located on both sides of the second fixing sleeve 2, and a rubber skin-friendly layer is provided on the inner side of both the first fixing sleeve 1 and the second fixing sleeve 2.

[0030] During operation, pulling the first fixing sleeve 1 and the second fixing sleeve 2 causes the second fixing sleeve 2 to rotate on the first fixing sleeve 1. At this time, the torsion spring 3 is compressed. When the first fixing sleeve 1 and the second fixing sleeve 2 are wrapped around the patient's arm, the first fixing sleeve 1 and the second fixing sleeve 2 are held tightly against the patient's arm by the torsion of the torsion spring 3, thereby ensuring the stability of the equipment during use and preventing the equipment from shaking during use.

[0031] The telescopic mechanism 4 includes a fixed rod 5, a first spring 6, and a sliding sleeve 7. The fixed rod 5 is fixedly connected to the first fixed sleeve 1. Two first springs 6 are fixedly connected to one end of the fixed rod 5. The sliding sleeve 7 is fixedly connected between the two first springs 6 and is slidably connected to the fixed rod 5. A universal ball joint 12 is rotatably connected to the fixed rod 5. A first groove 13 is formed on the sliding sleeve 7. Pulling the sliding sleeve 7 causes it to slide on the fixed rod 5. At this time, the first spring 6 between the sliding sleeve 7 and the fixed rod 5 is stretched, and the self-locking mechanism 8 slides between the sliding sleeve 7 and the fixed rod 5. When the sliding sleeve 7 is pulled to a suitable position, the length of the telescopic mechanism 4 is fixed. The telescopic mechanism 4 then adapts to the length of the patient's arm, effectively adapting the device to patients with different arm lengths. This avoids the device being too long or too short during use, preventing drawbacks and further improving the practicality and convenience of the device.

[0032] The self-locking mechanism 8 includes a second spring 9, a locking block 10, and a locking groove 11. The second spring 9 is fixedly connected to both sides of the fixed rod 5. The locking block 10 is installed at one end of the second spring 9. The surface of the locking block 10 is arc-shaped. Multiple locking grooves 11 are opened on both sides of the sliding sleeve 7. The locking block 10 is movably connected in the locking groove 11. Track grooves are provided between the multiple locking grooves 11.

[0033] When the self-locking mechanism 8 is working, the locking block 10 in the self-locking mechanism 8 slides in the locking groove 11. At this time, the locking block 10 squeezes the first spring 6, so that the length of the first spring 6 is compressed. When the locking block 10 moves from one locking groove 11 to another locking groove 11, the first spring 6 is in a compressed and then extended state, so that the locking block 10 cooperates with the first spring 6 to fix the parts, so as to ensure that the parts in the equipment are more convenient and stable during adjustment, and further improve the adjustment convenience and ease of use of the equipment.

[0034] The support mechanism 14 includes a vertical rod 15, an arc-shaped plate 16, an arc-shaped groove 17, and a support rod 18. The vertical rod 15 is slidably connected in the first sliding groove 13. The vertical rod 15 is provided with two other self-locking mechanisms 8. The locking groove 11 of the self-locking mechanism 8 is opened on both sides of the inner wall of the first sliding groove 13. The arc-shaped plate 16 is slidably connected to the vertical rod 15. The bottom surface of the arc-shaped plate 16 is provided with an arc-shaped groove 17. The locking groove 11 of the other self-locking mechanism 8 is opened on both sides of the inner wall of the arc-shaped groove 17. The support rod 18 is fixedly connected to the arc-shaped plate 16.

[0035] When the insertion angle or position of the catheter needs to be changed, the upright rod 15 is first pushed, causing it to slide in the first groove 13. As the upright rod 15 slides in the first groove 13, it drives the arc plate 16 and the support rod 18 to slide in the first groove 13. At this time, the self-locking mechanism 8 on the upright rod 15 works simultaneously. When the upright rod 15 slides, the guide plate 19 on the support rod 18 tilts simultaneously. At this time, the guide plate 19 is placed in a cross shape (similar to an X shape) relative to the telescopic mechanism 4 to ensure that the position of the catheter can be changed when it is inserted, avoiding secondary pain to the patient when the catheter is inserted. When the guide plate 19 rotates to the catheter insertion position, it drives the support plate and the arc plate 16 to rotate, causing the upright rod 15 to rotate in the arc groove 17. At this time, the guide plate 19 rotates in an arc shape with the upright rod 15 as the fulcrum, making catheter insertion more convenient and preventing catheter displacement.

[0036] As a further embodiment of the present invention, the lifting mechanism 20 includes a base 21, a sliding seat 22, a hydraulic rod 23, a vertical groove 24, and a horizontal groove 25. The base 21 is mounted on the universal ball 12. The bottom surface of the guide plate 19 has a vertical groove 24 and multiple horizontal grooves 25. The multiple horizontal grooves 25 are located on both sides of the vertical groove 24. The sliding seat 22 is slidably connected in the vertical groove 24. Another self-locking mechanism 8 is provided on the sliding seat 22. The locking groove 11 in the self-locking mechanism 8 is opened on both sides of the inner wall of the horizontal groove 25. The hydraulic rod 23 is rotatably connected between the base 21 and the sliding seat 22.

[0037] During operation, when the guide plate 19 rotates around the upright 15, the sliding seat 22 slides into the transverse groove 25. At this time, the self-locking mechanism 8 on the sliding seat 22 locks itself into the sliding groove to ensure the stability of the equipment after adjustment. When the guide plate 19 slides in the first sliding groove 13 under the drive of the upright 15, the base 21 deflects at a certain angle under the drive of the universal ball 12, thus ensuring that the guide plate 19 and the telescopic mechanism 4 change in an X shape. When it is necessary to change the inclination angle of the catheter insertion, the hydraulic rod 23 is extended or shortened to make the sliding seat 22 slide in the vertical groove 24. At this time, the sliding seat 22 can adjust the angle of the guide seat according to the extension or shortening of the hydraulic rod 23 to adapt to the change of the catheter insertion angle during use, thereby ensuring the effectiveness of the equipment during use and avoiding the situation where the catheter is misaligned or the position and angle cannot be adjusted due to the equipment, which could cause secondary injury to the patient during catheter insertion.

[0038] The abdominal pressure mechanism 26 includes abdominal pressure wheels 27, a fixed frame 28 and blades 29. Two abdominal pressure wheels 27 are rotatably connected inside the guide plate 19. A fixed frame 28 is fixedly connected inside the guide plate 19. Two blades 29 are installed inside the fixed frame 28 and are installed opposite to each other.

[0039] The catheter is placed between two pressure rollers 27 and the pressure rollers 27 are pushed forward, so that the two pressure rollers 27 apply abdominal pressure to the material. When the material passes through the two blades 29, the two blades 29 simultaneously cut the upper and lower sides of the material, so that the material after passing through the two blades 29 is in a broken state. At this time, the broken material is inserted into the guide ring 30. At this time, the sterilization mechanism 31 is activated, and the sterilized catheter is pulled out from the other end of the guide ring 30 and enters the patient's body. This avoids manual cutting, making the catheter more convenient and faster to enter the body, further ensuring the efficiency of catheter cutting, and also ensuring that the catheter enters the patient's body more accurately after passing through the pressure rollers 27, avoiding the possibility of catheter displacement.

[0040] As a further embodiment of the present invention, the disinfection mechanism 31 includes a disinfection box 32, a pump 33, and a delivery pipe 34. The disinfection box 32 is located on one side of the first fixing sleeve 1, and the pump 33 is mounted on the disinfection box 32. The delivery pipe 34 is located between the pump 33 and the guide ring 30, and a sponge layer is provided inside the guide ring 30. During operation, the pump 33 is turned on, causing it to draw liquid from the disinfection box 32 and deliver it through the delivery pipe 34 to the guide ring 30. At this time, the sponge layer inside the guide ring 30 absorbs the disinfectant and wipes and disinfects the catheter passing through the guide ring 30, ensuring the cleanliness of the catheter surface and preventing secondary infection of the patient due to a large number of bacteria and foreign objects on the catheter surface. This further improves the safety of catheter insertion and ensures the usability of the equipment.

Claims

1. A PICC catheter placement frame capable of preventing catheter displacement, comprising a first fixing sleeve (1), characterized in that: A second fixed sleeve (2) is rotatably connected to the first fixed sleeve (1). A telescopic mechanism (4) is provided on the first fixed sleeve (1). A self-locking mechanism (8), a first sliding groove (13), and a support mechanism (14) are provided on the telescopic mechanism (4). A universal ball (12) is also rotatably connected to the telescopic mechanism (4). The support mechanism (14) is slidably connected in the first sliding groove (13). A guide plate (19) is rotatably connected to the support mechanism (14). A lifting mechanism (20) is provided between the telescopic mechanism (4) and the guide plate (19). An abdominal pressure mechanism (26) and a guide ring (30) are provided in the guide plate (19). A disinfection mechanism (31) is provided on the guide ring (30). The lifting mechanism (20) includes a base (21), a sliding seat (22), a hydraulic rod (23), a vertical groove (24), and a horizontal groove (25). The base (21) is mounted on the universal ball (12). The bottom surface of the guide plate (19) is provided with a vertical groove (24) and multiple horizontal grooves (25). The multiple horizontal grooves (25) are located on both sides of the vertical groove (24). The sliding seat (22) is slidably connected in the vertical groove (24). Another self-locking mechanism (8) is provided on the sliding seat (22). The locking groove (11) in the self-locking mechanism (8) is opened on both sides of the inner wall of the horizontal groove (25). The hydraulic rod (23) is rotatably connected between the base (21) and the sliding seat (22).

2. A PICC catheter placement frame that can prevent catheter displacement according to claim 1, characterized in that: Two torsion springs (3) are provided between the first fixing sleeve (1) and the second fixing sleeve (2). The torsion springs (3) are located on both sides of the second fixing sleeve (2). The inner sides of the first fixing sleeve (1) and the second fixing sleeve (2) are provided with a rubber skin-friendly layer.

3. A PICC catheter placement frame that can prevent catheter displacement according to claim 1, characterized in that: The telescopic mechanism (4) includes a fixed rod (5), a first spring (6), and a sliding sleeve (7). The fixed rod (5) is fixedly connected to the first fixed sleeve (1). Two first springs (6) are fixedly connected to one end of the fixed rod (5). The sliding sleeve (7) is fixedly connected between the two first springs (6). The sliding sleeve (7) is slidably connected to the fixed rod (5). The universal ball (12) is rotatably connected to the fixed rod (5). The first groove (13) is formed on the sliding sleeve (7).

4. A PICC catheter placement frame that can prevent catheter displacement according to claim 3, characterized in that: The self-locking mechanism (8) includes a second spring (9), a locking block (10), and a locking groove (11). The second spring (9) is fixedly connected to both sides of the fixed rod (5). A locking block (10) is installed at one end of the second spring (9). The surface of the locking block (10) is arc-shaped. Multiple locking grooves (11) are provided on both sides of the sliding sleeve (7). The locking block (10) is movably connected in the locking groove (11). Track grooves are provided between the multiple locking grooves (11).

5. A PICC catheter placement frame that can prevent catheter displacement according to claim 1, characterized in that: The support mechanism (14) includes a vertical rod (15), an arc plate (16), an arc groove (17), and a support rod (18). The vertical rod (15) is slidably connected in the first sliding groove (13). The vertical rod (15) is provided with two other self-locking mechanisms (8). The locking groove (11) in the self-locking mechanism (8) is opened on both sides of the inner wall of the first sliding groove (13). The arc plate (16) is slidably connected in the vertical rod (15). The bottom surface of the arc plate (16) is provided with an arc groove (17). The locking groove (11) in the other self-locking mechanism (8) is opened on both sides of the inner wall of the arc groove (17). The support rod (18) is fixedly connected in the arc plate (16).

6. A PICC catheter placement frame that can prevent catheter displacement according to claim 1, characterized in that: The abdominal pressure mechanism (26) includes an abdominal pressure wheel (27), a fixed frame (28) and a blade (29). Two abdominal pressure wheels (27) are rotatably connected inside the guide plate (19). A fixed frame (28) is fixedly connected inside the guide plate (19). Two blades (29) are installed inside the fixed frame (28). The two blades (29) are arranged opposite to each other.

7. A PICC catheter placement frame according to claim 1 that can prevent catheter displacement, characterized in that: The disinfection mechanism (31) includes a disinfection box (32), a pump (33) and a delivery pipe (34). The disinfection box (32) is provided on one side of the first fixing sleeve (1). The pump (33) is installed on the disinfection box (32). The delivery pipe (34) is provided between the pump (33) and the guide ring (30). The guide ring (30) is provided with a sponge soft layer.

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