Goutstone cleaning brush used under arthroscope

Abstract

The invention discloses a tophus cleaning brush used under an arthroscope, and particularly relates to the technical field of medical auxiliary instruments, the tophus cleaning brush comprises an outer shell, a mounting head, a driving shaft, a brush head, bristles, a liquid backflow channel, a collecting cavity, a rotary driving unit and a scraping plate; and the moving driving unit is used for driving the two scraping plates on the brush head to move towards the radial direction of the brush head when the brush head rotates. Two brush heads are arranged to synchronously and reversely rotate, then the two brush heads can drive scraped gout crystals into a mounting cavity, when the brush heads rotate, scraping plates on the two brush heads are driven by a movable driving unit to move in the radial direction of the brush heads, and when the two corresponding scraping plates on the two brush heads are close to each other, the scraping plates on the two brush heads are driven by the movable driving unit to move in the radial direction of the brush heads. The scraper moves towards the radial outer side of the brush head, so that gout crystals in the articular cavity of the patient are well repelled, the gout crystals are rapidly and accurately collected into the mounting cavity in cooperation with the brush head, and percolate in the articular cavity flows into the collecting cavity through the liquid backflow channel.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary instruments, and more particularly to a tophi cleaning brush used under arthroscopy. Background Art

[0002] Gout arthritis is a common orthopedic disease. In the early and middle stages, it is mainly controlled by diet control, increased water intake, and oral uric acid-lowering drugs. In the middle and late stages, gout crystals are easily attached to the articular cartilage and meniscus, and further corrode the articular cartilage, while increasing the friction coefficient of the articular cartilage and the degree of wear of the joint cavity, leading to joint pain symptoms in patients. When the patient's joint pain recurs and cannot be controlled by oral medication, which seriously affects the functional activities of the affected limb and the patient's quality of life, arthroscopic gout crystal removal is required.

[0003] Chinese patent publication number CN214966293U discloses an arthroscopic articular cartilage gout crystal cleaning brush, which relates to the technical field of gout crystal scraping. It solves the problem that although the existing planer can partially remove gout crystals, it also scrapes away part of the articular cartilage, causing great damage to the articular cartilage, poor postoperative recovery of patients, and repeated attacks of joint pain. The main points of its technical solution are: it includes a hollow handle rod, the outer ring surface of the handle rod is provided with anti-skid grooves arranged at intervals, a mounting head is fixedly installed in the middle of the front end of the handle rod, a bearing plate is fixedly installed in the middle of the mounting head, and a protective tube is threadedly installed at the end of the mounting 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 cleaning gout crystals. When collecting gout crystals, the bristles on the brush head scrape off the gout crystals, and then negative pressure adsorption force is required to collect the gout crystals into the protective cover. It is known that when the brush head rotates, the bristles may scrape off the gout crystals and throw them to the outside of 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 of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a tophi cleaning brush for use under arthroscopy. The technical problem to be solved by the present invention is that when the cleaning brush in the prior art collects gout crystals, the gout crystals will be thrown away from the cleaning brush, resulting in the inability to accurately collect the gout crystals.

[0006] To achieve the above object, the present invention provides the following technical solution: an arthroscopic tophi cleaning brush, comprising:

[0007] An outer shell and a mounting head fixedly connected to one end of the outer shell, an mounting cavity is provided 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 installed at 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 connected to the mounting cavity is provided inside the mounting head, a collecting cavity is provided inside the outer shell, and the collecting cavity is connected to the liquid reflux channel;

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

[0009] The scrapers are arranged in groups of two 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 driving unit is used for driving 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 penetrates 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 with a driving gear, one end of the two driving 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 driving unit includes a sliding shaft coaxially penetrated in the driving shaft and spline-connected to the driving shaft, one end of the sliding shaft penetrated into the brush head is fixedly connected with two ear plates, the ear plate is penetrated by a sliding pin, a mounting hole for installing the ear plate is provided in the brush head, the through groove is connected with the mounting hole, the scraper is provided with a clearance 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, the partition is provided with a reciprocating structure, and the reciprocating structure is used to drive the sliding shaft to reciprocate horizontally when the driving shaft rotates.

[0014] Furthermore, the reciprocating structure includes a fixed ring connected to the outer wall of the partition, the end face of the fixed ring is fixedly connected to two arc-shaped protrusions, the end of the sliding shaft passing through the partition is fixedly connected to a mounting block, the mounting block is fixedly connected to one end facing the fixed ring with two mounting columns, the end of the mounting column is rotatably embedded with a ball, the ball rollingly contacts 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 direction of 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 two ends of the spring elastic force direction elastically press against the rotating ring and the inner wall of the motor installation cavity respectively.

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

[0017] Furthermore, a partition is fixedly connected in the installation cavity, and the partition and the bottom wall of the installation 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 installation 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 connecting cavity and its outer diameter increases successively in the direction away from the fixed sleeve, the expansion sleeve is coaxially provided with a connecting 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 connecting 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 fixedly connected 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 fixedly connected to a cross plate, and the scraper is used in conjunction with the cross plate.

[0019] Furthermore, a plurality of the deformation grooves are arranged in an axial array along 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 producing 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 driven to rotate synchronously, so that the ball rolls on the end face of the fixed ring and the surface of the arc-shaped protrusion, and then the elastic resistance of the spring to the rotating ring is supported, 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. Through the relative sliding of the sliding pin and the wall of the waist-shaped hole, the scraper can be driven 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 of 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 of 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 elastic contraction of the expansion sleeve, thereby reducing the orifice of the connecting 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 connecting hole and enter the collection cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of a tophi cleaning brush used under arthroscopy in the present invention;

[0025] Figure 2 for Figure 1 A 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 A schematic diagram of the 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 structure in FIG.

[0031] Figure 8 for Figure 4 A schematic diagram of the structure from a frontal angle;

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

[0033] Fig.10 for Fig. 9 A schematic cross-sectional view of the structure;

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

[0035] Fig.12 It is a schematic diagram of the structure after the outer shell and the mounting head are assembled in the present invention;

[0036] Fig.13 for Fig.12 A schematic cross-sectional view of the structure;

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

[0038] Fig.15 for Fig.14 A schematic cross-sectional view of the structure;

[0039] Fig.16 It is a structural schematic diagram of the scraper in the present invention;

[0040] Fig.17 It is a schematic diagram of the structure after the fixed sleeve and the expansion sleeve are assembled in the present invention;

[0041] Fig.18 for Fig.17 A schematic cross-sectional view of the structure;

[0042] Fig.19 It is a schematic diagram of the structure after the movable sleeve and the horizontal plate are assembled in the present invention;

[0043] Fig. 20 for Fig.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. driving 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0046] like Figure 1-Figure 20As shown, the present invention provides: an arthroscopic tophi cleaning brush, comprising an outer shell 2 and a mounting head 3 fixedly connected to one end of the outer shell 2, and the mounting head 3 can be integrally connected to 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, and a brush head 6 is installed at one end of the drive shaft 12 that penetrates into the installation cavity 8, and a plurality of bristles 5 are provided on the surface of the brush head 6, a liquid reflux channel 11 connected to 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 connected to the liquid reflux channel 11, and two scrapers 7 are symmetrically installed on each brush head 6 along its axial direction, and the two scrapers 7 are preferably made of stainless steel, so that the scrapers 7 can be used for cleaning 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 form a group, so that a total of two groups of scrapers 7 are arranged on the two brush heads 6. A through groove 33 is provided on the periphery of the brush head 6 for the scrapers 7 to pass freely. The end of the outer shell 2 away from the mounting head 3 is open and is threadedly connected with an 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 an external negative pressure device through an air pipe. After the negative pressure device is started, air can be evacuated from the collection chamber 17 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. A mounting hole for the ear plate 4 is provided in the brush head 6, and the through groove 33 is connected with the mounting hole. 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 forms an angle with 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. The partition encloses the collection chamber 17 into a motor installation chamber 15. A motor installation sleeve 16 is installed in the motor installation chamber 15. A micro motor 24 is installed in the motor installation sleeve 16. The output shaft of the micro motor 24 is connected to the driving gear 18. The two drive shafts 12 One end that penetrates into the motor installation 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 with a fixing ring 23 by screws, and 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, and 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 with two mounting columns 26 at one end facing the fixing ring 23. The end of the mounting column 26 is rotatably embedded with a ball 27, and 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 through an installation 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 and contact with the end surface 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, and then the meshing transmission of the two driven gears 13 makes 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 (reference, Figure 4 , the brush head 6 on the left rotates clockwise, and the brush head 6 on the right 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, since the driving shaft 12 is splined with 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 repeats this process, so that the sliding shaft 14 repeatedly moves on the driving shaft 12, and then the sliding shaft 14 can 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, and the scrapers 7 on the two brush heads 6 rotate synchronously in the opposite directions. When the two brush heads 6 are relatively When the two corresponding scrapers 7 approach each other, the scrapers 7 also move toward the radial outer side of the brush head 6 at the same time, so that the length of the scrapers 7 exposed from the brush head 6 increases, so that the scrapers 7 can scrape the gout crystals, and because the length of the scrapers 7 exposed from the brush head 6 increases during the rotation of 90 degrees, the scraped gout crystals can be quickly driven into the mounting cavity 8. Since the scrapers 7 change their moving direction on the brush head 6 each time they rotate 90 degrees, the scrapers 7 retract into the brush head 6 when not scraping the gout crystals, avoiding affecting the cleaning of the gout part of the joint cavity by the bristles 5. In addition, it also avoids the scrapers 7 being exposed from 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 fixedly connected in 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 with the liquid reflux channel 11. A fixing sleeve 20 is passed through the partition 9, and the fixing sleeve 20 is connected with the installation cavity 8 and the connecting cavity 19. An expansion sleeve 34 is integrally formed and fixedly connected to the lower end of the fixing sleeve 20, and 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. A connecting hole 36 that is connected with the fixing sleeve 20 is coaxially opened on the expansion sleeve 34, and a plurality of deformation grooves 35 that penetrate the connecting hole 36 are opened on the outer wall of the expansion sleeve 34. 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, and the movable sleeve 10 is coaxially opened with a tapered hole 37 used in conjunction with the expansion sleeve 34. A plurality of sliding rods 30 are fixedly connected to the upper end surface of the sleeve 10. 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 fixedly connected to the cross plate 29. 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 rods 30 and the cross plate 29 to move upward. At this time, the opening amplitude 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 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 located 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 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 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 changed to ensure the adsorption capacity of the exudate, so as to avoid the excessive power of the external negative pressure equipment and cause the absorption of the exudate, which affects other parts of the joint cavity.In addition, since the opening width of the communicating hole 36 in this embodiment is adjusted in real time as the scraper 7 rotates, when the opening width of the communicating hole 36 is large, the gout crystals scraped off enter the liquid reflux channel 11 and enter the collection chamber 17, and when the opening width of the communicating hole 36 is small, it can generate a greater suction force 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 on 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 for transmission, and then the meshing transmission of the two driven gears 13 causes the two driven gears 13 to 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 (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 can scrape gout crystals in the patient's joint cavity. In addition, when the drive shaft 12 rotates, since the drive shaft 12 is splined with 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 and so forth, so that the sliding shaft 14 repeatedly moves on the drive shaft 12, so that the sliding shaft 14 can drive the ear plate 4 to rotate. When the ear plate 4 moves repeatedly, the sliding pin 31 will slide in the waist-shaped hole 32, and the sliding pin 31 and the inner wall of the waist-shaped hole 32 will slide relative to each other, 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 outer side 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 the gout crystals, and because the length of the scraper 7 exposed from the brush head 6 increases during the 90-degree rotation of the scraper 7, the scraped gout crystals can be quickly driven into the mounting cavity 8;

[0049] During the rotation of the brush head 6, the scraper 7 will move along the radial direction of the brush head 6. When the scraper 7 is not in contact with 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, so that the movable sleeve 10 slides 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, and the power of the external negative pressure device remains unchanged. 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 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 located 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 move upward. The sleeve 10 slides 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. 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 grooves 35 gradually close, 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 and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0051] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[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 protection scope of the present invention.

Claims

1. An arthroscopic tophi cleaning brush, characterized in that: include: An outer shell (2) and a mounting head (3) fixedly connected to one end of the outer shell (2); an mounting 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); a brush head (6) is installed at one end of the drive shaft (12) that penetrates into the mounting cavity (8); a plurality of bristles (5) are provided on the surface of the brush head (6); a liquid reflux channel (11) communicating with the mounting cavity (8) is provided inside the mounting head (3); a collecting cavity (17) is provided inside the outer shell (2); the collecting cavity (17) is communicated with the liquid reflux channel (11); A rotation drive unit installed 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), wherein 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) to form a motor installation chamber (15), wherein a motor installation sleeve (16) is installed in the motor installation chamber (15), wherein a micro motor (24) is installed in the motor installation sleeve (16), wherein an output shaft of the micro motor (24) is drivingly connected to a driving gear (18), wherein one end of the two driving shafts (12) that penetrate into the motor installation chamber (15) is fixedly sleeved with a driven gear (13), wherein the two driven gears (13) are externally meshed, and wherein 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 comprises a sliding shaft (14) coaxially inserted into the driving shaft (12) and spline-connected to the driving 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-running 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) forms an angle with the sliding direction of the scraper (7) on the brush head (6); the partition is provided with a reciprocating movement structure, and the reciprocating movement structure is used to drive the sliding shaft (14) to reciprocate horizontally when the driving shaft (12) rotates.

5. The arthroscopic tophi cleaning brush according to claim 4, characterized in that: The reciprocating structure comprises a fixed ring (23) connected to the outer wall of the partition, the end surface of the fixed ring (23) is fixedly connected with two arc-shaped protrusions (28), one end of the sliding shaft (14) passing through the partition is fixedly connected with a mounting block (25), the end of the mounting block (25) facing the fixed ring (23) is fixedly connected with two mounting columns (26), the end of the mounting column (26) is rotatably embedded with a ball (27), the ball (27) rollingly contacts the end surface of the fixed ring (23) and the arc-shaped protrusion (28), and 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); 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 comprises 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 connecting cavity (19) and its outer diameter increases gradually in a direction away from the fixed sleeve (20); the expansion sleeve (34) is coaxially provided with a connecting hole (36) penetrating the fixed sleeve (20); the outer wall of the expansion sleeve (34) is provided with a plurality of deformation grooves (35) penetrating the connecting 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). A plurality of sliding rods (30) are fixedly connected to the upper end surface of the movable sleeve (10), 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 fixedly connected to a cross plate (29), and the scraper (7) is used in conjunction with the cross 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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