Gout stone cleaning brush under arthroscopy

Abstract

The application discloses a tophi cleaning brush under arthroscopy, and particularly relates to the technical field of medical auxiliary instruments, which comprises a shell body, a mounting head, a driving shaft, a brush head, brush hairs, a liquid backflow channel, a collecting cavity, a rotary driving unit and a scraper plate; a moving driving unit is arranged to drive the two scraper plates on the brush head to move radially when the brush head rotates. The two brush heads are arranged to rotate synchronously in opposite directions, so that the two brush heads can drive the scraped tophi crystals into the mounting cavity. When the brush head rotates, the scraper plates on the two brush heads are driven by the moving driving unit to move radially. When the two scraper plates on the two brush heads move close to each other, the scraper plates move radially outward, so that the tophi crystals in the joint cavity of the patient can be effectively driven. Then, the tophi crystals are quickly and accurately collected into the mounting cavity by the brush head. The effusion in the joint cavity flows into the collecting cavity through the liquid backflow channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical auxiliary devices, and more particularly to a gout tophi cleaning brush used under arthroscopy. BACKGROUND

[0002] Gouty arthritis is a common disease in orthopedics. In the early and middle stages, it is mainly controlled by diet control, increasing water intake, and oral administration of uric acid-lowering drugs. In the middle and late stages, gout crystals are easily attached to the articular cartilage and meniscus, further corroding the articular cartilage, increasing the friction coefficient of the articular cartilage, and increasing the degree of wear of the articular cavity, resulting in joint pain in patients. When the patient's joint pain repeatedly occurs, oral administration of drugs cannot control it, which seriously affects the functional activity of the affected limb and the quality of life of the patient, and therefore gout crystal cleaning under arthroscopy is required.

[0003] A gout crystal cleaning brush under arthroscopy is disclosed in Chinese Patent Publication No. CN214966293U, which relates to the technical field of gout crystal removal and solves the problem that the existing planer can partially remove gout crystals, but also removes part of the articular cartilage, causing greater damage to the articular cartilage, poor postoperative recovery, and repeated joint pain. The technical solution is as follows: a hollow handle rod is provided, a plurality of anti-slip grooves are formed on the outer ring surface of the handle rod, an installation head is fixedly installed at the middle of the front end of the handle rod, a bearing plate is fixedly installed at the middle of the installation head, and a protective tube is threadedly installed at the end of the installation head away from the handle rod.

[0004] The cleaning brush in the above-mentioned prior art collects gout crystals by rotating the brush head. When collecting gout crystals, the bristles on the brush head scrape down the gout crystals, and then negative pressure adsorption is required to collect the gout crystals into the protective cover. As known, when the brush head rotates, the bristles may scrape down the gout crystals and throw them outside the protective cover, causing the gout crystals to be unable to accurately enter the protective cover. Therefore, a cleaning device that can more accurately collect gout crystals is needed. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present application provide a gout tophi cleaning brush used under arthroscopy, which solves the problem that the cleaning brush in the prior art can throw gout crystals away from the cleaning brush when collecting gout crystals, causing the phenomenon that gout crystals cannot be accurately collected.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a gout tophi cleaning brush used under arthroscopy, comprising:

[0007] An outer shell and a mounting head fixedly connected to one end of the outer shell, a mounting cavity is defined at one end of the mounting head away from the outer shell, the mounting head is rotatably connected to two drive shafts, a brush head is mounted on one end of the drive shaft that penetrates into the mounting cavity, a plurality of bristles are provided on the surface of the brush head, a liquid reflux channel communicating with the mounting cavity is defined inside the mounting head, a collection chamber is defined inside the outer shell, and the collection chamber is communicated with the liquid reflux channel;

[0008] A rotation drive unit mounted on the outer shell and configured to drive the two drive shafts to rotate synchronously and in opposite directions;

[0009] The scrapers are arranged in pairs on the brush head, the two scrapers on the brush head are symmetrically arranged along the axial direction of the brush head, and the periphery of the brush head is provided with a through groove for the scrapers to pass freely;

[0010] A moving drive unit is used to drive the two scrapers on the brush head to move radially toward the brush head when the brush head rotates.

[0011] Furthermore, one end of the outer shell away from the mounting head is open and is detachably connected to an end cover, and the end cover is provided with a pipe interface that passes through the collecting chamber.

[0012] Furthermore, the rotation drive unit includes a partition fixedly connected to the collection chamber, the partition encloses the collection chamber into a motor mounting chamber, a motor mounting sleeve is installed in the motor mounting chamber, a micro motor is installed in the motor mounting sleeve, the output shaft of the micro motor is driven and connected to a driving gear, one end of the two drive shafts passing through the motor mounting chamber is fixedly sleeved with a driven gear, the two driven gears are externally meshed, and one of the driven gears is meshed with the driving gear.

[0013] Furthermore, the mobile drive unit includes a sliding shaft coaxially passed through the drive shaft and spline-connected to the drive shaft, one end of the sliding shaft passing through the brush head is fixed with two ear plates, the ear plate is passed through a sliding pin, and a mounting hole for mounting the ear plate is provided in the brush head, the through groove is connected to the mounting hole, the scraper is provided with a free-passing groove for the ear plate to pass freely, the scraper is provided with a waist-shaped hole for the sliding pin to be inserted, the length direction of the waist-shaped hole forms an angle with the sliding direction of the scraper on the brush head, and the partition is provided with a reciprocating structure, which is used to drive the sliding shaft to move reciprocatingly horizontally when the drive shaft rotates.

[0014] Furthermore, the reciprocating structure includes a fixed ring connected to the outer wall of the partition, two arc-shaped protrusions are fixed to the end face of the fixed ring, one end of the sliding shaft passing through the partition is fixed with a mounting block, and two mounting columns are fixed to the end of the mounting block facing the fixed ring, and balls are rotatably embedded in the end of the mounting column, and the balls roll in contact with the end face of the fixed ring and the arc-shaped protrusion, and the sliding shaft is provided with an elastic driving component for driving the mounting block to move toward the fixed ring.

[0015] Furthermore, the elastic drive assembly includes a rotating ring rotatably sleeved on the sliding shaft, the sliding shaft sleeve is wound with a spring, and both ends of the spring in the direction of elastic force elastically press against the rotating ring and the inner side wall of the motor installation cavity respectively.

[0016] Furthermore, the scraper is made of stainless steel.

[0017] Furthermore, a partition is fixedly connected to the mounting cavity, and the partition and the bottom wall of the mounting cavity form a connecting cavity, and the connecting cavity is connected to the liquid reflux channel. The partition is penetrated by a fixed sleeve, and the fixed sleeve is connected to the mounting cavity and the connecting cavity, and the fixed sleeve is provided with a flow control unit, and the flow control unit is used to intermittently adjust the gas flow in the fixed sleeve when the brush head rotates.

[0018] Furthermore, the flow control unit includes an expansion sleeve that is integrally formed and fixed to the lower end of the fixed sleeve. The expansion sleeve is located in the communicating cavity and its outer diameter increases successively in the direction away from the fixed sleeve. The expansion sleeve is coaxially provided with a communicating hole that passes through the fixed sleeve. The outer wall of the expansion sleeve is provided with a plurality of deformation grooves that pass through the communicating hole. The expansion sleeve is connected with a movable sleeve. The movable sleeve is coaxially provided with a tapered hole used in conjunction with the expansion sleeve. A plurality of sliding rods are fixed to the upper end surface of the movable sleeve. The sliding rods pass through the partition and can slide freely. One end of the sliding rod passing through the partition is fixed to a horizontal plate, and the scraper is used in conjunction with the horizontal plate.

[0019] Furthermore, a plurality of the deformation grooves are arranged in an array along the axial direction of the expansion sleeve.

[0020] Technical effects and advantages of the present invention:

[0021] By setting the two brush heads to rotate synchronously in opposite directions, the two brush heads can drive the scraped gout crystals into the installation cavity, and when the brush heads rotate, the mobile driving unit drives the scrapers on the two brush heads to move radially toward the brush heads. When the two corresponding scrapers on the two brush heads approach each other, the scrapers will move radially outwards of the brush heads, thereby having a better driving effect on the gout crystals in the patient's joint cavity, and then cooperate with the brush heads to quickly and accurately collect the gout crystals into the installation cavity, and the exudate in the joint cavity will flow into the collection cavity through the liquid reflux channel;

[0022] When the driving shaft is set to rotate, the sliding shaft is driven to rotate. When the sliding shaft rotates, the mounting block is synchronously driven to rotate, so that the ball rolls on the end face of the fixed ring and the surface of the arc-shaped protrusion, and then the spring elastically resists the rotating ring, so that the sliding shaft can reciprocate along the axial direction of the driving shaft. When the sliding shaft moves, the sliding pin will slide in the waist-shaped hole of the scraper. The relative sliding of the sliding pin and the wall of the waist-shaped hole can drive the scraper to move along the radial direction of the brush head, thereby achieving the effect of driving the scraper to move when the brush head rotates. The whole process is automated and no manual operation is required.

[0023] By setting a fixed sleeve, an expansion sleeve and a movable sleeve, when the scraper starts to move radially outward from the brush head and exposes the periphery of the brush head, the scraper will come into contact with the cross plate, and as the scraper continues to move radially outward from the brush head, the scraper drives the cross plate to move downward. When the cross plate moves downward, the movable sleeve and the outer wall of the expansion sleeve slide relative to each other. During the relative sliding, the expansion sleeve can be squeezed, causing the expansion sleeve to produce elastic contraction, thereby reducing the size of the orifice of the communicating hole. After the orifice is reduced, the power of the external negative pressure device remains unchanged, thereby increasing the suction force of the negative pressure device on the liquid in the installation cavity, so that the exudate in the joint cavity can be quickly sucked into the liquid reflux channel from the communicating hole and enter the collection cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of an arthroscopic tophi cleaning brush of the present invention;

[0025] Figure 2 for Figure 1 Schematic cross-sectional view of the structure;

[0026] Figure 3 for Figure 1 A schematic cross-sectional view of the structure from a frontal perspective;

[0027] Figure 4 for Figure 1 The schematic diagram of the structure after the outer shell is omitted;

[0028] Figure 5 for Figure 4 Schematic diagram of the middle structure from a side view;

[0029] Figure 6 for Figure 5 A magnified schematic diagram of the local structure at point A;

[0030] Figure 7 for Figure 4 A schematic side view of the mid-structure;

[0031] Figure 8 for Figure 4 Schematic diagram of the structure from a frontal perspective;

[0032] Figure 9 This is a schematic diagram of the structure of the drive shaft, sliding shaft and brush head after assembly in the present invention;

[0033] Figure 10 for Figure 9 Schematic cross-sectional view of the structure;

[0034] Figure 11 for Figure 10 A magnified schematic diagram of the local structure at point B in the middle;

[0035] Figure 12 This is a schematic diagram of the structure of the outer shell and the mounting head after assembly in the present invention;

[0036] Figure 13 for Figure 12 Schematic cross-sectional view of the structure;

[0037] Figure 14 This is a schematic diagram of the structure of the drive shaft and brush head after assembly in the present invention;

[0038] Figure 15 for Figure 14 Schematic cross-sectional view of the structure;

[0039] Figure 16 Schematic diagram of the structure of the scraper in the present invention;

[0040] Figure 17 This is a schematic diagram of the structure of the fixed sleeve and the expansion sleeve after assembly in the present invention;

[0041] Figure 18 for Figure 17 Schematic cross-sectional view of the structure;

[0042] Figure 19 This is a schematic diagram of the structure of the movable sleeve and the horizontal plate after assembly in the present invention;

[0043] Figure 20 for Figure 19 Schematic cross-sectional view of the structure.

[0044] The accompanying drawings are marked as follows: 1. end cover; 2. outer shell; 3. mounting head; 4. ear plate; 5. bristles; 6. brush head; 7. scraper; 8. mounting cavity; 9. partition; 10. movable sleeve; 11. liquid reflux channel; 12. drive shaft; 13. driven gear; 14. sliding shaft; 15. motor mounting cavity; 16. motor mounting sleeve; 17. collecting cavity; 18. driving gear; 19. connecting cavity; 20. fixed sleeve; 21. rotating ring; 22. spring; 23. fixed ring; 24. micro motor; 25. mounting block; 26. mounting column; 27. ball; 28. arc-shaped protrusion; 29. ​​cross plate; 30. sliding rod; 31. sliding pin; 32. waist-shaped hole; 33. through groove; 34. expansion sleeve; 35. deformation groove; 36. connecting hole; 37. tapered hole. DETAILED DESCRIPTION

[0045] 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 creative efforts are within the scope of protection of the present invention.

[0046] like Figures 1-20As shown, the present invention provides: an arthroscopic tophi cleaning brush, comprising an outer shell 2 and a mounting head 3 fixed to one end of the outer shell 2, and the mounting head 3 can be integrally connected to the outer shell 2, and a mounting cavity 8 is provided at one end of the mounting head 3 away from the outer shell 2, and the mounting head 3 is rotatably connected to two drive shafts 12, and a brush head 6 is installed at one end of the drive shaft 12 that penetrates into the mounting cavity 8, and a plurality of bristles 5 are provided on the surface of the brush head 6, and a liquid reflux channel 11 connected to the mounting cavity 8 is provided inside the mounting head 3, and a collecting chamber 17 is provided inside the outer shell 2, and the collecting chamber 17 is connected to the liquid reflux channel 11, and each brush head 6 is symmetrically provided with two scrapers 7 along its axial direction, and the two scrapers 7 are preferably made of stainless steel, so that the scrapers 7 can effectively clean the liquid in the joint cavity. No rust will occur after the liquid comes into contact. In addition, the two scrapers 7 on each brush head 6 are a group, so that a total of two groups of scrapers 7 are set on the two brush heads 6. A through groove 33 is provided on the periphery of the brush head 6 for the scraper 7 to pass freely. The end of the outer shell 2 away from the mounting head 3 is open and is threadedly connected to the end cover 1. The end cover 1 is provided with a pipe interface that passes through the collection chamber 17. The pipe interface is connected to the external negative pressure equipment through the air pipe. After the negative pressure equipment is started, the collection chamber 17 can be evacuated through the pipe interface. A sliding shaft 14 is coaxially penetrated on the drive shaft 12. The sliding shaft 14 and the drive shaft 12 are splined, so that the sliding shaft 14 and the drive shaft 12 can rotate synchronously, and the sliding shaft 14 can slide on the drive shaft 12 along the axial direction of the drive shaft 12. In addition, the sliding One end of the shaft 14 that penetrates into the brush head 6 is welded with two ear plates 4, and the two ear plates 4 are symmetrically arranged along the axial direction of the sliding shaft 14. The ear plate 4 is penetrated by a sliding pin 31, and a mounting hole for the ear plate 4 is provided in the brush head 6. The groove 33 is connected with the mounting hole, and the scraper 7 is provided with an air avoidance groove for the ear plate 4 to pass freely. The scraper 7 is provided with a waist-shaped hole 32 for the sliding pin 31 to be inserted. The length direction of the waist-shaped hole 32 is at an angle to the sliding direction of the scraper 7 on the brush head 6. A partition is welded on the inner wall of the collection chamber 17, and the partition encloses the collection chamber 17 into a motor mounting chamber 15. A motor mounting sleeve 16 is installed in the motor mounting chamber 15, and a micro motor 24 is installed in the motor mounting sleeve 16. The output shaft of the micro motor 24 is driven and connected with a driving gear 18. The two drive shafts 12 One end that penetrates into the motor mounting cavity 15 is fixedly sleeved with a driven gear 13, and the two driven gears 13 are meshed externally, and one of the driven gears 13 is meshed with the driving gear 18. The outer wall of the interlayer is connected to a fixing ring 23 by screws. The ring hole of the fixing ring 23 can allow the sliding shaft 14 to pass freely. In addition, the sliding shaft 14 penetrates the interlayer and can slide freely horizontally. The end face of the fixing ring 23 is fixedly connected with two arc-shaped protrusions 28. The end of the sliding shaft 14 that passes through the interlayer is fixedly connected with a mounting block 25. The mounting block 25 is fixedly connected to one end of the fixing ring 23 with two mounting posts 26. The end of the mounting post 26 is rotatably embedded with a ball 27. The ball 27 rolls in contact with the end face of the fixing ring 23 and the arc-shaped protrusion 28. The sliding shaft 14 is fixedly sleeved with a rotating ring 21 by installing a bearing.The sliding shaft 14 is sleeved with a spring 22, and the two ends of the spring 22 in the elastic direction elastically press against the rotating ring 21 and the inner wall of the motor installation cavity 15 respectively. In the initial state, the spring 22 generates an elastic pressing force on the rotating ring 21, so that the sliding shaft 14 slides toward the inner side of the motor installation cavity 15, and makes the ball 27 roll in contact with the end face of the fixing ring 23 or the surface of the arc-shaped protrusion 28. An external power supply is connected and the micro motor 24 is started. The output shaft of the micro motor 24 drives the driving gear 18 to rotate, and the driving gear 18 meshes with one of the driven gears 13 for transmission. Then, through the meshing transmission of the two driven gears 13, the two driven gears 13 respectively drive the two driving shafts 12 to rotate synchronously in the opposite direction, so that the two brush heads 6 rotate synchronously in the opposite direction. When the brush heads 6 rotate synchronously in the opposite direction (reference, Figure 4 The left brush head 6 rotates clockwise, and the right brush head 6 rotates counterclockwise), which will make the bristles 5 on the brush head 6 rotate and can scrape gout crystals in the patient's joint cavity. In addition, when the driving shaft 12 rotates, the driving shaft 12 is splined with the sliding shaft 14, which makes the sliding shaft 14 rotate synchronously and drives the mounting block 25 to rotate. When the mounting block 25 rotates, the ball 27 rolls from the end face of the fixing ring 23 to the surface of the arc-shaped protrusion 28, and then rolls from the surface of the arc-shaped protrusion 28 to the end face of the fixing ring 23, and so on. Repeatedly, the sliding shaft 14 produces repeated movement on the driving shaft 12, which can make the sliding shaft 14 drive the ear plate 4 to move repeatedly. When the ear plate 4 moves repeatedly, the sliding pin 31 slides in the waist-shaped hole 32, and the sliding pin 31 slides relative to the inner wall of the waist-shaped hole 32, thereby driving the scraper 7 to move repeatedly along the radial direction of the brush head 6. The scrapers 7 on the two brush heads 6 rotate synchronously in opposite directions. When the two brush heads 6 are relatively When the two scrapers 7 approach each other, the scrapers 7 also move toward the radial outside of the brush head 6, so that the length of the scrapers 7 exposed to the brush head 6 increases, so that the scrapers 7 can scrape the gout crystals, and because the length of the scrapers 7 exposed to the brush head 6 increases during the 90-degree rotation, the gout crystals scraped off can be quickly driven into the mounting cavity 8. Since the scrapers 7 change their movement direction on the brush head 6 each time they rotate 90 degrees, when the scrapers 7 do not scrape the gout crystals, the scrapers 7 retract into the brush head 6, avoiding affecting the cleaning of the gout area of ​​the joint cavity by the bristles 5. In addition, it also avoids the scrapers 7 being exposed to the brush head 6 for a long time. When they rotate, they produce rigid contact with the joint cavity, thereby causing greater damage to the joint cavity. The external negative pressure device works and generates negative pressure suction on the collection cavity 17 and the liquid reflux channel 11. Under the action of the negative pressure suction, the exudate in the joint cavity will be sucked into the mounting cavity 8, and then discharged through the liquid reflux channel 11 and the collection cavity 17.

[0047] A partition 9 is integrally formed and fixed in the installation cavity 8. The partition 9 and the inner bottom wall of the installation cavity 8 form a connecting cavity 19. The connecting cavity 19 is connected to the liquid reflux channel 11. The partition 9 is penetrated by a fixing sleeve 20. The fixing sleeve 20 is connected to the installation cavity 8 and the connecting cavity 19. The lower end of the fixing sleeve 20 is integrally formed and fixed with an expansion sleeve 34. The expansion sleeve 34 is located in the connecting cavity 19 and its outer diameter increases successively in the direction away from the fixing sleeve 20. The expansion sleeve 34 is coaxially provided with a connecting hole 36 that is connected to the fixing sleeve 20. The outer wall of the expansion sleeve 34 is provided with a plurality of deformation grooves 35 that pass through the connecting hole 36. The plurality of deformation grooves 35 are arranged in an axial array along the expansion sleeve 34. The expansion sleeve 34 is sleeved with a movable sleeve 10. The movable sleeve 10 is coaxially provided with a tapered hole 37 used in conjunction with the expansion sleeve 34. The upper end surface of the sleeve 10 is fixed with a plurality of sliding rods 30, which pass through the partition 9 and can slide freely. One end of the sliding rod 30 passing through the partition 9 is fixed with a cross plate 29, and the scraper 7 is used in conjunction with the cross plate 29. When the scraper 7 is not in contact with the cross plate 29, the elastic deformation of the expansion sleeve 34 itself causes the expansion sleeve 34 to be in an elastically expanded state, so that the outer wall of the expansion sleeve 34 and the inner wall of the tapered hole 37 on the movable sleeve 10 slide relative to each other, causing the movable sleeve 10 to slide upward. When the movable sleeve 10 slides upward, it will drive the sliding rod 30 and the cross plate 29 to move upward. At this time, the opening amplitude of the lower end portion of the connecting hole 36 is the largest, the power of the external negative pressure device remains unchanged, and the minimum aperture of the connecting hole 36 is large, so the suction force of the negative pressure device on the exudate is also relatively small at this time. The scraper 7 does not scrape off the gout crystals (or the length of the scraper 7 exposed from the brush head 6 is short), and when the length of the scraper 7 exposed from the brush head 6 begins to increase, the two scrapers 7 on the lower side will begin to conflict with the top surface of the cross plate 29, thereby driving the cross plate 29 to drive the sliding rod 30 and the movable sleeve 10 to slide downward. When the movable sleeve 10 slides downward, the inner wall of the tapered hole 37 on the movable sleeve 10 and the outer wall of the expansion sleeve 34 slide relative to each other, and since the outer wall of the expansion sleeve 34 is provided with a plurality of deformation grooves 35, the expansion sleeve 34 will produce elastic contraction deformation. When the expansion sleeve 34 elastically contracts, the mouth of the lower end of the communicating hole 36 begins to shrink, and the deformation groove 35 gradually closes, thereby reducing the opening amplitude of the communicating hole 36, while the power of the external negative pressure device remains unchanged, thereby making The gas flow rate at the connecting hole 36 (the direction of the air flow is along the installation cavity 8 and the connecting cavity 19 into the liquid reflux channel 11) is increased, so that the adsorption capacity of the exudate is improved. In addition, since the scraper 7 begins to drive the gout crystals into the installation cavity 8 at this time, the gout crystals are also simultaneously affected by the negative pressure suction, so that part of the gout crystals are sucked into the liquid reflux channel 11 and then enter the collection cavity 17. It should be noted that the suction force of the negative pressure equipment in the general medical field cannot be too large. Therefore, the above-mentioned setting of the opening amplitude of the connecting hole 36 mouth is set to ensure the adsorption capacity of the exudate, while avoiding the excessive power of the external negative pressure equipment causing the absorption of the exudate to affect other parts of the joint cavity.In addition, since the opening of the communicating hole 36 in this embodiment is adjusted in real time as the scraper 7 rotates, when the opening of the communicating hole 36 is large, the gout crystals scraped off enter the liquid reflux channel 11 and then the collection chamber 17. When the opening of the communicating hole 36 is small, a greater suction force is generated on the joint cavity exudate, thereby improving the collection efficiency of the exudate.

[0048] The working principle of the present invention is as follows: the external power supply is started, so that the micro motor 24 can be powered and rotated, the output shaft of the micro motor 24 drives the driving gear 18 to rotate, the driving gear 18 is meshed with one of the driven gears 13, and then the two driven gears 13 are meshed and driven, thereby making the two driven gears 13 drive the two driving shafts 12 to rotate synchronously in the opposite direction, so that the two brush heads 6 rotate synchronously in the opposite direction. When the brush heads 6 rotate synchronously in the opposite direction (refer to Figure 4 , the left brush head 6 rotates clockwise, and the right brush head 6 rotates counterclockwise), which will cause the bristles 5 on the brush head 6 to rotate and be able to scrape gout crystals in the patient's joint cavity. In addition, when the drive shaft 12 rotates, since the drive shaft 12 is spline-connected to the sliding shaft 14, the sliding shaft 14 rotates synchronously and drives the mounting block 25 to rotate. When the mounting block 25 rotates, the ball 27 rolls from the end face of the fixing ring 23 to the surface of the arc-shaped protrusion 28, and then rolls from the surface of the arc-shaped protrusion 28 to the end face of the fixing ring 23, and so on. Repeatedly, the sliding shaft 14 moves repeatedly on the drive shaft 12, which can enable the sliding shaft 14 to drive the ear plate 4 to rotate. When the ear plate 4 moves repeatedly, the sliding pin 31 slides in the waist-shaped hole 32, and the sliding pin 31 slides relative to the inner wall of the waist-shaped hole 32, thereby driving the scraper 7 to move repeatedly along the radial direction of the brush head 6. The scrapers 7 on the two brush heads 6 rotate synchronously in opposite directions. When the two corresponding scrapers 7 on the two brush heads 6 approach each other, the scraper 7 also moves toward the radial outside of the brush head 6, so that the length of the scraper 7 exposed from the brush head 6 increases, so that the scraper 7 can scrape gout crystals, and because the length of the scraper 7 exposed from the brush head 6 increases during the 90-degree rotation, the gout crystals scraped off can be quickly driven into the mounting cavity 8;

[0049] When the brush head 6 rotates, the scraper 7 will move along the radial direction of the brush head 6. When the scraper 7 does not contact the cross plate 29, the elastic deformation of the expansion sleeve 34 itself makes the expansion sleeve 34 in an elastically expanded state, so that the outer wall of the expansion sleeve 34 and the inner wall of the tapered hole 37 on the movable sleeve 10 slide relative to each other, causing the movable sleeve 10 to slide upward. When the movable sleeve 10 slides upward, it will drive the sliding rod 30 and the cross plate 29 to move upward. At this time, the opening of the lower end of the connecting hole 36 is the largest, the power of the external negative pressure device remains unchanged, and the minimum aperture of the connecting hole 36 is large, so the suction force of the negative pressure device on the exudate is also small at this time. At this time, the scraper 7 does not scrape off the gout crystals (or the length of the scraper 7 exposed from the brush head 6 is short), and when the length of the scraper 7 exposed from the brush head 6 begins to increase, the two scrapers 7 on the lower side will begin to conflict with the top surface of the cross plate 29, thereby driving the cross plate 29 to drive the sliding rod 30 and the movable sleeve 10 As the sleeve 10 slides downward, the inner wall of the tapered hole 37 on the movable sleeve 10 slides relative to the outer wall of the expansion sleeve 34, and since the outer wall of the expansion sleeve 34 is provided with a plurality of deformation grooves 35, the expansion sleeve 34 will produce elastic contraction deformation. When the expansion sleeve 34 elastically contracts, the mouth of the lower end of the connecting hole 36 begins to shrink, and the deformation groove 35 gradually closes, thereby reducing the opening amplitude of the connecting hole 36, while the power of the external negative pressure device remains unchanged, thereby increasing the gas flow rate at the connecting hole 36 (the direction of the air flow is along the installation cavity 8 and the connecting cavity 19 into the liquid reflux channel 11), thereby improving the adsorption capacity of the exudate. In addition, since the scraper 7 begins to drive the gout crystals into the installation cavity 8 at this time, the gout crystals are also simultaneously affected by the negative pressure suction force, so that part of the gout crystals are sucked into the liquid reflux channel 11 and then enter the collection cavity 17.

[0050] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0051] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0052] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An arthroscopic tophi cleaning brush, characterized in that: include: An outer shell (2) and a mounting head (3) fixed to one end of the outer shell (2), an installation cavity (8) is provided at one end of the mounting head (3) away from the outer shell (2), the mounting head (3) is rotatably connected to two drive shafts (12), one end of the drive shaft (12) that penetrates into the installation cavity (8) is mounted with a brush head (6), a surface of the brush head (6) is provided with a plurality of bristles (5), a liquid reflux channel (11) in communication with the installation cavity (8) is provided inside the mounting head (3), a collecting cavity (17) is provided inside the outer shell (2), and the collecting cavity (17) is in communication with the liquid reflux channel (11); a rotation drive unit mounted on the outer shell (2) and used for driving the two drive shafts (12) to rotate synchronously and in opposite directions; The scrapers (7) are arranged in pairs on the brush head (6), the two scrapers (7) on the brush head (6) are symmetrically arranged along the axial direction of the brush head (6), and the periphery of the brush head (6) is provided with a through groove (33) for the scrapers (7) to pass freely; A moving drive unit is used for driving the two scrapers (7) on the brush head (6) to move radially toward the brush head (6) when the brush head (6) rotates.

2. The arthroscopic tophi cleaning brush according to claim 1, characterized in that: One end of the outer shell (2) away from the mounting head (3) is open and is detachably connected to an end cover (1), and the end cover (1) is provided with a pipe interface that is in communication with the collecting chamber (17).

3. The arthroscopic tophi cleaning brush according to claim 1, characterized in that: The rotary drive unit comprises a partition fixedly connected to the collecting chamber (17), wherein the partition encloses the collecting chamber (17) into a motor mounting chamber (15), a motor mounting sleeve (16) is installed in the motor mounting chamber (15), a micro motor (24) is installed in the motor mounting sleeve (16), an output shaft of the micro motor (24) is driven and connected to a driving gear (18), one end of the two driving shafts (12) passing through the motor mounting chamber (15) is fixedly sleeved with a driven gear (13), the two driven gears (13) are externally meshed, and one of the driven gears (13) is meshed with the driving gear (18).

4. The arthroscopic tophi cleaning brush according to claim 3, characterized in that: The mobile drive unit includes a sliding shaft (14) coaxially inserted into the drive shaft (12) and spline-connected to the drive shaft (12); one end of the sliding shaft (14) inserted into the brush head (6) is fixedly connected to two ear plates (4); the ear plate (4) is penetrated by a sliding pin (31); a mounting hole for mounting the ear plate (4) is provided in the brush head (6); the through groove (33) is connected to the mounting hole; the scraper (7) is provided with a free-passing groove for the ear plate (4); the scraper (7) is provided with a waist-shaped hole (32) for the sliding pin (31) to be inserted; the length direction of the waist-shaped hole (32) forms an angle with the sliding direction of the scraper (7) on the brush head (6); the partition is provided with a reciprocating moving structure, and the reciprocating moving structure is used to drive the sliding shaft (14) to move back and forth horizontally when the drive shaft (12) rotates.

5. The arthroscopic tophi cleaning brush according to claim 4, characterized in that: The reciprocating structure includes a fixed ring (23) connected to the outer wall of the partition, the end face of the fixed ring (23) is fixed with two arc-shaped protrusions (28), one end of the sliding shaft (14) passing through the partition is fixed with a mounting block (25), the mounting block (25) is fixed with two mounting columns (26) facing one end of the fixed ring (23), the end of the mounting column (26) is rotatably embedded with a ball (27), the ball (27) rolling contact the end face of the fixed ring (23) and the arc-shaped protrusion (28), the sliding shaft (14) is provided with an elastic driving component for driving the mounting block (25) to move toward the fixed ring (23).

6. The arthroscopic tophi cleaning brush according to claim 5, characterized in that: The elastic drive assembly comprises a rotating ring (21) rotatably sleeved on the sliding shaft (14); the sliding shaft (14) is sleeved with a spring (22); and the two ends of the spring (22) in the elastic force direction elastically press against the rotating ring (21) and the inner wall of the motor installation cavity (15) respectively.

7. The arthroscopic tophi cleaning brush according to claim 1, characterized in that: The scraper (7) is made of stainless steel.

8. The arthroscopic tophi cleaning brush according to claim 1, characterized in that: A partition (9) is fixedly connected to the installation cavity (8), and the partition (9) and the inner bottom wall of the installation cavity (8) form a connecting cavity (19), and the connecting cavity (19) is connected to the liquid reflux channel (11). The partition (9) is penetrated by a fixing sleeve (20), and the fixing sleeve (20) is connected to the installation cavity (8) and the connecting cavity (19), and the fixing sleeve (20) is provided with a flow control unit, and the flow control unit is used to intermittently adjust the gas flow in the fixing sleeve (20) when the brush head (6) rotates.

9. The arthroscopic tophi cleaning brush according to claim 8, characterized in that: The flow control unit includes an expansion sleeve (34) integrally formed and fixed to the lower end of the fixed sleeve (20), the expansion sleeve (34) is located in the communicating cavity (19) and its outer diameter increases in sequence in the direction away from the fixed sleeve (20), the expansion sleeve (34) is coaxially provided with a communicating hole (36) that passes through the fixed sleeve (20), the outer wall of the expansion sleeve (34) is provided with a plurality of deformation grooves (35) that pass through the communicating hole (36), and the expansion sleeve (34) is provided with a plurality of deformation grooves (35) that pass through the communicating hole (36). The sleeve (34) is sleeved with a movable sleeve (10), and the movable sleeve (10) is coaxially provided with a tapered hole (37) for use with the expansion sleeve (34). The upper end surface of the movable sleeve (10) is fixed with a plurality of sliding rods (30), and the sliding rods (30) pass through the partition (9) and can slide freely. One end of the sliding rod (30) passing through the partition (9) is fixed with a transverse plate (29), and the scraper (7) is used in conjunction with the transverse plate (29).

10. The arthroscopic tophi cleaning brush according to claim 9, characterized in that: The plurality of deformation grooves (35) are arranged in an axial array along the expansion sleeve (34).

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