Extractor for free body in articular cavity

Abstract

The invention relates to the technical field of free body taking-out devices, and discloses an intra-articular cavity free body taking-out device which comprises a shell sleeve, one end of the shell sleeve is provided with a catching head for catching free bodies, the catching head is of a soft structure, and one end of the shell sleeve is provided with an expanding and supporting mechanism for driving the catching head to be adjusted to be in a net cover shape. Compared with the prior art, the device has the advantages that the angle of the expanding and supporting mechanism can be adjusted through the adjusting mechanism, then the angle of the catching head is adjusted, a larger degree of freedom is obtained in the limited space of a joint cavity, the use convenience is improved, and the device is suitable for popularization and application. The catching head of the mesh-shaped structure can catch the free body in the articular cavity, the free body does not need to be grabbed, the catching head can be suitable for the small or special free body, the catching head of the mesh-shaped structure can catch a plurality of free bodies at the same time, the treatment time of a patient is shortened, and the pain of the patient is relieved.

Description

Technical Field

[0001] The invention relates to the technical field of loose body removal devices, in particular to a loose body remover in a joint cavity. Background Art

[0002] Loose bodies in the joint cavity are tissue fragments that fall off from the tissues in the joint due to joint degeneration, injury, etc. Loose bodies can cause symptoms such as joint pain and locking, affecting joint function. With the help of an intra-articular loose body remover, these loose bodies can be removed from the joint cavity, thereby alleviating the patient's symptoms, preventing further damage to the joint, and restoring the normal function of the joint.

[0003] Existing loose body extractors in the joint cavity are usually grasping forceps and basket forceps. Grasping forceps can grasp loose bodies by controlling the opening and closing of the jaws through a handle, while basket forceps can cut and decompose larger or irregularly shaped loose bodies before removing them. They are suitable for loose bodies of different sizes and textures. However, when in use, existing loose body extractors can only remove one loose body at a time, while there are usually multiple loose bodies, resulting in low removal efficiency and prolonged treatment time for patients. Furthermore, existing loose body extractors have difficulty in grasping and fixing smaller loose bodies or loose bodies with special textures, further reducing the efficiency of loose body removal. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a device for removing loose bodies in the joint cavity.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: an intra-articular loose body extractor, comprising a shell sleeve, a catcher for catching the loose body at one end of the shell sleeve, the catcher being a soft structure, a support mechanism for driving the catcher to be adjusted into a mesh shape at one end of the shell sleeve, an adjustment mechanism for supporting and adjusting the direction of the support mechanism is provided in the shell sleeve, the support mechanism comprises a fixed plate fixedly connected to the adjustment mechanism, an extension frame is provided on the side of the fixed plate away from the shell sleeve, a driving arm is rotatably provided on the side wall of the extension frame, and a plurality of driving arms are equidistantly arranged along the circumferential direction of the fixed plate, a plurality of groups of driving arms are rotatably provided at the ends of the plurality of groups of driving arms, matching arms are symmetrically rotatably provided on the connecting heads, matching heads are rotatably provided between two adjacent groups of matching arms, a positioning slide is provided at one end of the extension frame away from the fixed plate, a positioning slider is slidably provided in the positioning slide, a driving connecting rod is rotatably provided on the side wall of the positioning slider, a driving sleeve rotatably connected to the driving connecting rod is provided on the driving arm, a positioning spring connected to the extension frame is provided on the positioning slider, and a traction rope is provided on the positioning slider.

[0006] As an improvement, the surge mechanism includes a surge sleeve arranged at one end of the positioning slide away from the extension frame, and two interconnected cavities are provided in the surge sleeve, one of the cavities is provided with a liquid inlet pipe, and the other cavity is provided with a liquid outlet pipe. The surge sleeve is provided with a one-way flow mechanism that drives the liquid to flow from the liquid inlet pipe into the surge sleeve and then out of the liquid outlet pipe as the positioning slide slides.

[0007] As an improvement, the one-way circulation mechanism includes a sealing piston which is slidingly connected to one of the cavity seals, the sealing piston is connected to the positioning slider, a connecting pipe is provided inside the sealing piston, a plurality of drainage ports are provided on the connecting pipe along the circumferential direction, one end of the connecting pipe is a narrowing structure, a sealing ball head is movably sealed and connected inside the connecting pipe, one end of the sealing ball head is provided with a sealing spring connected to the sealing piston, one end of the other cavity is a gradually narrowing structure, a sealing ball head is movably sealed and connected inside the cavity, a sealing spring connected to the surge sleeve is provided at the lower end of the sealing ball head.

[0008] As an improvement, the adjustment mechanism includes a lever and a bearing column, which are respectively arranged at both ends of the shell. The lever extends out of the shell, and the bearing column is connected to the fixed plate at one end away from the lever. A synchronization mechanism is provided in the shell to drive the bearing column to move with the lever.

[0009] As an improvement, the synchronization mechanism includes a fixed bracket and a longitudinal bracket arranged in a shell sleeve, a horizontal rotating bracket is rotatably provided on the fixed bracket, a longitudinal rotating column fixedly connected to the shift rod is rotatably provided on the horizontal rotating bracket, the rotation directions of the horizontal rotating bracket and the longitudinal rotating column are perpendicular to each other, and connecting ball heads are provided at both ends of the longitudinal rotating column, a longitudinal rotating bracket is rotatably provided on the longitudinal bracket, a horizontal rotating column fixedly connected to the bearing column is rotatably provided on the longitudinal rotating bracket, the rotation directions of the horizontal rotating column and the longitudinal rotating bracket are perpendicular to each other, matching ball heads are provided at both ends of the horizontal rotating column, a synchronization rod is provided between the matching ball head and the connecting ball head, and synchronization ball sleeves are provided at both ends of the synchronization rod, which respectively roll with the matching ball head and the connecting ball head.

[0010] As an improvement, a guide groove wheel is rotatably provided at the lower end of the longitudinal bracket, a matching groove wheel is rotatably provided inside the shell sleeve, a push block is slidably provided on the shell sleeve, and the traction rope passes through the guide groove wheel and the matching groove wheel in sequence and is connected to the push block.

[0011] As an improvement, supporting pipe racks are provided on both sides of the shell, and a water inlet pipe and a water outlet pipe are respectively provided on the two supporting pipe racks, and one end of the water inlet pipe and the water outlet pipe both extend out of the shell.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the adjustment mechanism can adjust the angle of the extension mechanism, and then adjust the angle of the catcher head, so as to obtain greater freedom in the limited space of the joint cavity, and improve the convenience of use; the catcher head with a mesh cover structure can capture the loose bodies in the joint cavity without grabbing the loose bodies, and can be suitable for small or special loose bodies; the catcher head with a mesh cover structure can capture multiple loose bodies at the same time, and reduce the treatment time of the patient and relieve the pain of the patient. Specifically: 1. Press the push block, and the push block pulls the positioning slider to slide along the positioning slide through the traction rope. The positioning slider drives the driving arm to rotate and open through the cooperation of the driving connecting rod and the driving sleeve. The driving arm drives the connecting head, the matching arm and the matching head to move and open synchronously. The fixing plate, the connecting head and the matching head cooperate to pull the catching head. The catching head opens to form a net cover structure, which is convenient for capturing loose bodies in the joint cavity and improves the efficiency of capturing loose bodies. 2. As the sealing piston slides, the liquid outside the surge sleeve enters the surge sleeve through the liquid inlet pipe and flows out through the liquid outlet pipe, so that the liquid in the joint cavity drives the loose body to flow, avoiding the loose body from getting stuck in the corner of the joint cavity, reducing the difficulty of capturing the loose body, improving the efficiency of capturing the loose body, and shortening the capture time of the loose body; 3. By turning the lever, the supporting column drives the support mechanism to rotate in the same direction, so that the angle of the support mechanism can be easily adjusted in a small space of the joint cavity, and then the angle of the capture head can be adjusted, so as to collect multiple loose bodies faster and shorten the patient's treatment time. At the same time, the lever and the supporting column rotate in the same direction, which is in line with operating habits and reduces the operator's learning cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic structural diagram of a loose body extractor in a joint cavity.

[0014] Figure 2 It is an exploded view of an intra-articular loose body extractor of the present invention.

[0015] Figure 3 The present invention is a cross-sectional view of a loose body extractor in a joint cavity.

[0016] Figure 4 The present invention is a kind of intra-articular loose body extractor Figure 3 Enlarged view of part A.

[0017] Figure 5 The present invention is a schematic structural diagram of the cooperation between a support mechanism and a capture head of a loose body extractor in a joint cavity.

[0018] Figure 6 It is an exploded view of a support mechanism of an intra-articular loose body extractor of the present invention.

[0019] Figure 7 The present invention is a kind of intra-articular loose body extractor Figure 6 Magnified view of part B.

[0020] Figure 8 It is an exploded view of a surge mechanism of an intra-articular loose body extractor of the present invention.

[0021] Fig. 9 The present invention is a cross-sectional view of a surge mechanism of a loose body extractor in a joint cavity.

[0022] Fig.10 The present invention is a schematic structural diagram of an adjustment mechanism of an intra-articular loose body extractor.

[0023] Fig.11 It is an exploded view of an adjustment mechanism of an intra-articular loose body extractor of the present invention.

[0024] Fig.12 The present invention is a schematic structural diagram of a shell sleeve of a loose body extractor in a joint cavity.

[0025] As shown in the figure: 1. Shell; 11. Support pipe rack; 12. Water inlet pipe; 13. Water outlet pipe; 14. Handle; 15. Matching groove wheel; 2. Extension mechanism; 21. Fixed plate; 211. Extension frame; 212. Driving arm; 213. Driving sleeve; 214. Driving connecting rod; 22. Connecting head; 221. Matching arm; 222. Matching head; 23. Positioning slide; 24. Positioning slide; 241. Positioning spring; 25. Traction rope; 26. Press block; 3. Catching head; 4. Adjustment mechanism; 41. Fixed bracket; 411. Horizontal rotating frame; 412 , longitudinal rotating column; 413, connecting ball head; 414, shift rod; 42, synchronization rod; 421, synchronization ball sleeve; 43, longitudinal bracket; 431, longitudinal rotating frame; 432, horizontal rotating column; 433, matching ball head; 434, bearing column; 435, guide groove wheel; 5, surge mechanism; 51, surge sleeve; 511, liquid inlet pipe; 512, liquid outlet pipe; 513, sealing spring; 514, sealing ball head; 52, sealing piston; 521, sealing ring; 522, drain port; 523, connecting pipe; 524, sealing spring; 525, sealing ball head. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 With attached Fig.12As shown, a device for removing loose bodies in a joint cavity comprises a shell 1. The shell 1 is an L-shaped structure with one end open as a whole. A handle 14 is provided on the shell 1. A catch head 3 for catching loose bodies is provided at one end of the shell 1. The catch head 3 is a soft structure. A support mechanism 2 for driving the catch head 3 to adjust to a mesh shape is provided at one end of the shell 1. An adjustment mechanism 4 for supporting and adjusting the direction of the support mechanism 2 is provided in the shell 1. The catch head 3 is made of polyester wire through weaving. Support pipe racks 11 are provided on both sides of the shell 1. A water inlet pipe 12 and a water outlet pipe 13 are respectively provided on the two support pipe racks 11. A groove for indicating the flow direction of the water inlet pipe 12 and the water outlet pipe 13 is provided on the support pipe rack 11. One end of the water inlet pipe 12 and the water outlet pipe 13 extend out of the shell 1.

[0028] The working principle of the present invention is as follows: the shell 1 is moved, and the shell 1 can drive the catching head 3, the support mechanism 2 and the adjustment mechanism 4 to synchronously approach or move away from the target area of ​​the joint cavity. When the shell 1 drives the support mechanism 2 and the catching head 3 to reach the target point through the adjustment mechanism 4, at this time, the adjustment mechanism 4 can be operated to further adjust the angle of the support mechanism 2, and then adjust the angle of the catching head 3, so as to obtain a greater degree of freedom in the limited space of the joint cavity and improve the convenience of use. Afterwards, the catching head 3 is unfolded to form a mesh structure through the support mechanism 2, and the catching head 3 with the mesh structure can capture the loose bodies in the joint cavity. The catching head 3 with the mesh structure can capture multiple loose bodies at the same time. The setting of the adjustment mechanism 4 enables the catching head 3 to quickly capture more loose bodies without multiple captures, thereby reducing the treatment time of the patient and alleviating the pain of the patient. The L-shaped shell 1 is matched with the setting of the handle 14, which is convenient for the operator to hold, reduces the operating fatigue and improves the stability of the operation. The arrangement of the water inlet pipe 12 and the blow pipe can conveniently inject transition liquid into the joint cavity. The transition liquid can be physiological saline. The injection of the transition liquid facilitates the capture of loose bodies while cleaning the patient's wound surface to prevent the patient from infection during treatment.

[0029] Combined with Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 With attached Figure 7 As shown, the extension mechanism 2 includes a fixed plate 21 fixedly connected to the adjustment mechanism 4, an extension frame 211 is provided on the side of the fixed plate 21 away from the shell 1, a driving arm 212 is rotatably provided on the side wall of the extension frame 211, and four groups of driving arms 212 are equidistantly arranged along the circumferential direction of the fixed plate 21, and the ends of the multiple groups of driving arms 212 are all rotatably provided with connecting heads 22, and matching arms 221 are symmetrically rotatably provided on the connecting heads 22, and a matching head 222 is rotatably provided between two adjacent groups of matching arms 221, and the connecting heads 22, matching heads 222 and the fixed plate 21 are all connected to the catcher 3; The extension frame 211 is provided with a positioning slide 23 at one end away from the fixed plate 21, and a positioning slider 24 is slidably provided in the positioning slide 23. A driving connecting rod 214 is rotatably provided on the side wall of the positioning slider 24. A driving sleeve 213 rotatably connected to the driving connecting rod 214 is provided on the driving arm 212, and a positioning spring 241 connected to the extension frame 211 is provided on the positioning slider 24. A traction rope 25 is provided on the positioning slider 24. A guide groove wheel 435 is rotatably provided at the lower end of the longitudinal bracket 43, and a matching groove wheel 15 is rotatably provided in the shell sleeve 1. A pressing block 26 is slidably provided on the shell sleeve 1, and the traction rope 25 passes through the guide groove wheel 435 and the matching groove wheel 15 in sequence and then is connected to the pressing block 26.

[0030] The working principle of the extension mechanism 2 is as follows: the pressing block 26 is pressed, the pressing block 26 slides along the shell 1 and pulls the positioning slide block 24 synchronously along the positioning slide frame 23 through the traction rope 25, the positioning slide block 24 squeezes the positioning spring 241, and the positioning spring 241 is forced to shrink. In this process, the positioning slide block 24 drives multiple groups of equidistantly arranged driving arms 212 to rotate and open through the cooperation of the driving connecting rod 214 and the driving sleeve 213, and the driving arm 212 drives the connecting head 22, the matching arm 221 and the matching head 222 to move and open synchronously. Since the connecting head 22, the matching head 222 and the fixing plate 21 are all connected to the catching head 3, the fixing plate 21, the connecting head 22 and the matching head 222 cooperate to pull the catching head 3 to form a skeleton structure of different heights, so that the catching head 3 is opened and forms a net-like structure, so as to facilitate the capture of loose bodies in the joint cavity; Furthermore, after releasing the push block 26, the positioning spring 241 is reset and drives the positioning slider 24 to reset, and the traction rope 25 reacts on the push block 26 to drive the push block 26 to slide and reset along the shell 1. At the same time, the positioning slider 24 drives the connecting head 22, the matching arm 221 and the matching head 222 to be synchronously recovered and drive the catching head 3 to be narrowed through the cooperation of the driving sleeve 213 and the driving support arm 212, thereby facilitating the removal of the catching head 3 from the joint cavity. Since the catching head 3 is a soft structure, after narrowing, the captured loose body is stored inside the catching head 3 and can be taken out of the joint cavity together with the catching head 3, thereby completing the removal operation of the loose body.

[0031] Combined with Figure 3 , Attachment Figure 4 , Attachment Figure 8 With attached Fig. 9As shown, the surge mechanism 5 includes a surge sleeve 51 arranged at one end of the positioning slide 23 away from the extension frame 211, and two mutually connected cavities are arranged in the surge sleeve 51. One of the cavities is connected with a liquid inlet pipe 511, and the other cavity is connected with a liquid outlet pipe 512. Multiple groups of liquid outlet pipes 512 are arranged around the circumference of the surge sleeve 51. The diameter of the liquid inlet pipe 511 is larger than that of the liquid outlet pipe 512. A one-way flow mechanism is arranged in the surge sleeve 51, which drives the liquid to flow from the liquid inlet pipe 511 into the surge sleeve 51 and then flow out of the liquid outlet pipe 512 as the positioning slide 24 slides; The one-way flow mechanism includes a sealing piston 52 which is sealingly and slidingly connected to one of the cavities, a sealing ring 521 is sleeved on the sealing piston 52, one end of the sealing piston 52 extending out of the surge sleeve 51 is connected to the positioning slider 24, a connecting pipe 523 is provided in the sealing piston 52, and a plurality of liquid discharge ports 522 are provided on the connecting pipe 523 along the circumferential direction, one end of the connecting pipe 523 is a narrowing structure, a sealing ball head 525 is movably and sealingly connected in the connecting pipe 523, and a sealing spring 524 connected to the sealing piston 52 is provided at one end of the sealing ball head 525, and one end of the other cavity is a gradually narrowing structure, a sealing ball head 514 is movably and sealingly connected in the cavity, and a sealing spring 513 connected to the surge sleeve 51 is provided at the lower end of the sealing ball head 514.

[0032] The working principle of the surge mechanism 5: the sealing piston 52 moves synchronously with the positioning slider 24 to attach Fig. 9 From a different perspective, when the sealing piston 52 slides to the right, the sealing piston 52 drives the sealing spring 524 and the sealing ball head 525 to move synchronously. At this time, the sealing ball head 525 seals the connecting pipe 523. As the sealing piston 52 moves, the liquid outside the surge sleeve 51 enters the surge sleeve 51 through the liquid inlet pipe 511 and is stored on the left side of the sealing piston 52. The liquid squeezes the sealing ball head 514, and the sealing spring 513 is forced to shrink synchronously. During this process, the liquid on the right side of the sealing piston 52 flows out through the liquid outlet pipe 512. After that, the sealing piston 52 slides to the left. At this time, the sealing spring 513 is reset and drives the sealing ball head. 514 is reset to achieve the sealing of the liquid inlet pipe 511, and the liquid on the left side of the sealing piston 52 enters the connecting pipe 523 and squeezes the sealing ball head 525. The sealing spring 524 is forced to shrink, and the liquid enters the right side of the sealing piston 52 from the left side of the sealing piston 52 through the connecting pipe 523 and the drain port 522 to achieve the transfer of liquid. The above process can be repeated to achieve the operation of introducing the external liquid of the surge sleeve 51 from the liquid inlet pipe 511 and unidirectionally flowing out through the liquid outlet pipe 512, so that the liquid in the joint cavity drives the free body to flow, avoids the free body from being stuck in the corner of the joint cavity, reduces the difficulty of capturing the free body, and shortens the capture time of the free body.

[0033] Combined with Figure 3 , Attachment Fig.10 With attached Fig.11 As shown, the adjustment mechanism 4 includes a lever 414 and a bearing column 434, the lever 414 and the bearing column 434 are respectively arranged at two ends of the shell 1, the lever 414 extends out of the shell 1, and the end of the bearing column 434 away from the lever 414 is connected to the fixing plate 21, and a synchronization mechanism for driving the bearing column 434 to move with the lever 414 is provided in the shell 1; The synchronization mechanism includes a fixed bracket 41 and a longitudinal bracket 43 arranged in the shell 1, a horizontal rotating bracket 411 is rotatably provided on the fixed bracket 41, a longitudinal rotating column 412 is rotatably provided on the horizontal rotating bracket 411 and a longitudinal rotating column 412 is fixedly connected to the lever 414, the rotation directions of the horizontal rotating bracket 411 and the longitudinal rotating column 412 are perpendicular to each other, connecting ball heads 413 are provided at both ends of the longitudinal rotating column 412, a longitudinal rotating bracket 431 is rotatably provided on the longitudinal bracket 43, a horizontal rotating column 432 fixedly connected to the bearing column 434 is rotatably provided on the longitudinal rotating bracket 431, the rotation directions of the horizontal rotating column 432 and the longitudinal rotating bracket 431 are perpendicular to each other, matching ball heads 433 are provided at both ends of the horizontal rotating column 432, a synchronization rod 42 is provided between the matching ball head 433 and the connecting ball head 413, and synchronization ball sleeves 421 are provided at both ends of the synchronization rod 42, which are respectively rollingly matched with the matching ball head 433 and the connecting ball head 413.

[0034] Working principle of the adjustment mechanism 4: the lever 414 is rotated in the horizontal direction. Since the fixed bracket 41 limits the rotation of the horizontal rotating frame 411, the lever 414 drives the horizontal rotating frame 411 to rotate in the horizontal direction through the longitudinal rotating column 412. During the synchronous rotation of the connecting ball head 413, the matching ball head 433 is driven to rotate synchronously through the synchronous ball sleeve 421 and the synchronous rod 42. Since the longitudinal rotating frame 431 limits the rotation of the bearing column 434, the bearing column 434 rotates synchronously, thereby driving the extension mechanism 2 to rotate in the horizontal direction. Furthermore, when the lever 414 is rotated in the vertical direction, the longitudinal rotating column 412 rotates along the horizontal rotating frame 411, and with the cooperation of the synchronization rod 42 and the synchronization ball sleeve 421, the connecting ball head 413 drives the matching ball head 433 to rotate synchronously, and the matching ball head 433 drives the horizontal rotating column 432 and the longitudinal rotating frame 431 to rotate synchronously, and the supporting column 434 drives the support mechanism 2 to rotate in the vertical direction. The combination of the above two directions of movement makes it convenient for the operator to adjust the angle by driving the supporting column 434 by turning the lever 414. The setting of the adjustment mechanism 4 makes it possible to conveniently adjust the angle of the support mechanism 2 in a smaller space of the joint cavity, and then adjust the angle of the capture head 3, so as to facilitate faster collection of multiple loose bodies and shorten the treatment time of patients.

[0035] When the present invention is implemented, firstly, a comprehensive physical examination is performed on the patient, including assessing the range of motion, pain level, swelling of the joints and performing imaging examinations, selecting a suitable anesthesia method according to the surgical site and the patient's condition, and preparing all surgical instruments; Afterwards, multiple incisions are established around the joint as the entrances of the arthroscope and the device of the present invention to avoid damaging the surrounding blood vessels, nerves and tendons, and the joint cavity is fully explored through the arthroscope lens. A transition liquid (herein, physiological saline is used as an example) is injected into the joint cavity through the water inlet pipe 12 to expand the joint cavity. Afterwards, the lever 414 is rotated to drive the bearing column 434 to rotate synchronously through the lever 414 to adjust the position of the catcher 3, and the push block 26 is pressed to open the catcher 3. In this process, the push block 26 is pressed and released multiple times to move the loose body in the joint cavity and enter the catcher 3. The catcher 3 with a soft mesh cover structure captures and wraps around the loose body to fix it, thereby achieving the capture of the loose body. Finally, continue to inject physiological saline into the joint cavity to rinse the wound surface, remove debris and blood clots generated during the operation, complete the loose body removal operation, press the button block 26 to open the capture head 3 to remove the loose body and clean and disinfect the device of the present invention.

[0036] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A loose body extractor in a joint cavity, comprising a shell (1), one end of the shell (1) being provided with a catcher (3) for catching the loose body, characterized in that: The catch head (3) is a soft structure, one end of the shell (1) is provided with a support mechanism (2) for driving the catch head (3) to adjust to a mesh shape, and the shell (1) is provided with an adjustment mechanism (4) for supporting the support mechanism (2) and adjusting the direction of the support mechanism (2); The extension mechanism (2) comprises a fixed plate (21) fixedly connected to the adjustment mechanism (4); an extension frame (211) is provided on a side of the fixed plate (21) away from the shell (1); a driving support arm (212) is rotatably provided on a side wall of the extension frame (211); a plurality of driving support arms (212) are equidistantly arranged in a circumferential direction of the fixed plate (21); a connecting head (22) is rotatably provided at the end of each of the plurality of driving support arms (212); a matching support arm (221) is symmetrically rotatably provided on the connecting head (22); a matching head (222) is rotatably provided between two adjacent groups of matching support arms (221); A positioning slide (23) is provided at one end of the extension frame (211) away from the fixed plate (21), a positioning slider (24) is slidably provided inside the positioning slider (23), a driving connecting rod (214) is rotatably provided on the side wall of the positioning slider (24), a driving sleeve (213) rotatably connected to the driving connecting rod (214) is provided on the driving support arm (212), a positioning spring (241) connected to the extension frame (211) is provided on the positioning slider (24), and a traction rope (25) is provided on the positioning slider (24).

2. The intra-articular loose body extractor according to claim 1, characterized in that: The surge mechanism (5) comprises a surge sleeve (51) arranged at one end of the positioning slide (23) away from the extension frame (211), the surge sleeve (51) being provided with two mutually connected cavities, one of the cavities being connected with a liquid inlet pipe (511), and the other of the cavities being connected with a liquid outlet pipe (512), and the surge sleeve (51) being provided with a one-way flow mechanism which drives liquid to flow from the liquid inlet pipe (511) into the surge sleeve (51) and then flow out from the liquid outlet pipe (512) as the positioning slide (24) slides.

3. The intra-articular loose body extractor according to claim 2, characterized in that: The one-way flow mechanism comprises a sealing piston (52) which is sealingly and slidably connected to one of the cavities. The sealing piston (52) is connected to a positioning slider (24). A connecting pipe (523) is provided in the sealing piston (52). A plurality of liquid discharge ports (522) are provided on the connecting pipe (523) along a circumferential direction. One end of the connecting pipe (523) is a narrowing structure. A sealing ball head (525) is movably and sealingly connected in the connecting pipe (523). One end of the sealing ball head (525) is provided with a sealing spring (524) connected to the sealing piston (52). One end of the other cavity is a gradually narrowing structure. A sealing ball head (514) is movably and sealingly connected in the cavity. A sealing spring (513) connected to the surge sleeve (51) is provided at the lower end of the sealing ball head (514).

4. The intra-articular loose body extractor according to claim 1, characterized in that: The adjustment mechanism (4) comprises a lever (414) and a bearing column (434), the lever (414) and the bearing column (434) being respectively arranged at two ends of the shell (1), the lever (414) extending out of the shell (1), the bearing column (434) being connected to the fixing plate (21) at one end away from the lever (414), and a synchronization mechanism for driving the bearing column (434) to move with the lever (414) being arranged in the shell (1).

5. The intra-articular loose body extractor according to claim 4, characterized in that: The synchronization mechanism comprises a fixed bracket (41) and a longitudinal bracket (43) arranged in the housing (1); a horizontal rotating bracket (411) is rotatably provided on the fixed bracket (41); a longitudinal rotating column (412) fixedly connected to a lever (414) is rotatably provided on the horizontal rotating bracket (411); the rotation directions of the horizontal rotating bracket (411) and the longitudinal rotating column (412) are perpendicular to each other; and connecting ball heads (413) are provided at both ends of the longitudinal rotating column (412); A longitudinal rotating frame (431) is rotatably provided on the longitudinal bracket (43), a horizontal rotating column (432) fixedly connected to a bearing column (434) is rotatably provided on the longitudinal rotating frame (431), the horizontal rotating column (432) and the longitudinal rotating frame (431) rotate in perpendicular directions to each other, matching ball heads (433) are provided at both ends of the horizontal rotating column (432), a synchronous rod (42) is provided between the matching ball head (433) and the connecting ball head (413), and synchronous ball sleeves (421) are provided at both ends of the synchronous rod (42) for rolling cooperation with the matching ball head (433) and the connecting ball head (413), respectively.

6. The intra-articular loose body extractor according to claim 5, characterized in that: A guide groove wheel (435) is rotatably provided at the lower end of the longitudinal bracket (43), a matching groove wheel (15) is rotatably provided inside the shell (1), a pressing block (26) is slidably provided on the shell (1), and the traction rope (25) passes through the guide groove wheel (435) and the matching groove wheel (15) in sequence and is then connected to the pressing block (26).

7. The intra-articular loose body extractor according to claim 1, characterized in that: Support pipe racks (11) are provided on both sides of the shell (1), and a water inlet pipe (12) and a water outlet pipe (13) are provided on the two support pipe racks (11), respectively, and one end of the water inlet pipe (12) and the water outlet pipe (13) extend out of the shell (1).

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