Cannula device for temporomandibular arthroscope approach

Abstract

The invention discloses a cannula device for temporomandibular arthroscope approach, and relates to the technical field of medical instruments, the cannula device comprises a cannula assembly and a handle, one end of the handle is provided with a cannula piece, the top of the handle is sleeved with a sealing cover, one side of the handle is fixedly provided with a flushing pipe, and the other side of the handle is fixedly provided with an injection pipe. According to the invention, each passage can be opened and closed synchronously, it is ensured that only one passage is opened in the operation process, pipeline pollution caused by backflow of internal liquid is avoided, the other two passages are closed in the operation process, the operation process is not influenced by the other two passages, the whole structure is divided into three gears, and the operation is convenient. By means of the technical scheme, quick switching of the channels can be achieved only by manually rotating the rotating disc, the operation convenience of medical staff is greatly improved, automatic exhaust probing can be conducted after the channels are closed, and compared with manual probing through a probe, probing is faster, and operation time is saved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a cannula device for temporomandibular arthroscopy. Background Technology

[0002] Temporomandibular joint arthroscopy is a minimally invasive technique used to diagnose and treat temporomandibular joint disorders. The procedure requires frequent irrigation, endoscopic observation, and drug injection. In traditional surgery, these procedures are often performed through multiple independent instruments or channels, which not only increases the complexity of the surgery but also prolongs the operation time. Especially when switching between different functions (such as irrigation and injection), the tubing needs to be repeatedly connected and disconnected, which can easily lead to fluid reflux, cross-contamination, or air ingress, affecting the clarity of the surgical field and the safety of the operation.

[0003] The existing cannula device used for temporomandibular arthroscopy usually has multiple interconnected pathways. During procedures such as irrigation and injection, the irrigation fluid or medication may flow back into other pathways, increasing the risk of contamination. Postoperatively or between procedures, to prevent blockage of small tubes, medical staff usually need to manually probe them with a probe. This process is time-consuming and requires high precision, further prolonging the operation time and potentially introducing operational errors. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing cannula devices for temporomandibular arthroscopy, the present invention is proposed.

[0006] Therefore, the problem that this invention aims to solve is that the rinsing solution or medicine may flow back into other pathways, increasing the risk of contamination. After the operation or between procedures, in order to prevent blockage of small tubes, medical staff usually need to manually use a probe to open them. This process is time-consuming and requires high operational precision, which further prolongs the operation time and may also introduce operational errors.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a cannula device for temporomandibular arthroscopy, comprising: a cannula assembly including a handle, a cannula fitting at one end of the handle, a sealing cap fitted on the top of the handle, an irrigation tube fixed on one side of the handle, an injection tube fixed on the other side of the handle, a length compensator fixed on the top of the sealing cap; and a sealing assembly including a housing fitted around the outer ring of the length compensator, a sliding plate fixed on the top of the housing, support plates fixed on both sides of the inner cavity of the housing, a push-pull member provided in the inner cavity of the housing, a switching member fixed on one side of the push-pull member, a first stop provided at the bottom of the sealing cap, second stops provided on both sides of the top of the sealing cap, a sealing element provided on the surface of the sliding plate, a locking element provided on the surface of the sealing element, a probe fixed on one side of the inner cavity of the housing, a check valve provided in the inner cavity of the handle, and locking holes provided on both sides of the inner cavity of the housing.

[0008] As a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the cannula includes a first cannula, which is threadedly connected to the inner cavity of the handle, and an arc-shaped baffle is fixed to the inner wall of the handle.

[0009] In a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the push-pull component includes a push rod slidably connected to both sides of the inner cavity of the outer shell. One end of the push rod is movably fitted with a push-pull plate, and both ends of the push rod are fixed with fixing plates. A positioning rod is slidably connected to the surface of the fixing plate. A second spring is fitted around the outer ring of the positioning rod. One end of the second spring is fixed to the surface of the positioning rod, and the other end of the second spring is fixed to the surface of the fixing plate. A roller is fitted around the outer ring of the push rod.

[0010] As a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the switching component includes a turntable fixed to one end of a push rod, an identification plate fixed to the outer ring of the turntable, a connecting rod rotatably connected to the surface of the turntable, a positioning groove provided on one side of the turntable, and a compression plate fixed to one end of the push rod.

[0011] In a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the first stop includes a rotating rod rotatably connected to the bottom of the sealing cover, one end of the rotating rod is fixed with a first sealing plate, and the other end of the rotating rod is fixed with a gear.

[0012] In a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the second stop includes a sliding rod slidably connected to the top of the sealing cover, a second sealing plate fixed to the bottom of the sliding rod, a first spring sleeved on the surface of the sliding rod, a cover fixed to both sides of the top of the sealing cover, one end of the first spring fixed to the surface of the sliding rod, the other end of the first spring fixed to the inner wall of the cover, and a sliding post fixed to one end of the sliding rod.

[0013] As a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the sealing element includes a first cover plate slidably connected to the top of the length compensator, a second cover plate slidably connected to the top of both the irrigation tube and the injection tube, a toothed plate fixed to one side of the first cover plate, and oblique perforated plates fixed to both the front and rear sides of the second cover plate.

[0014] In a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the locking device includes a sleeve fixed to both sides of the first cover plate and the second cover plate, a third spring fixed in the inner cavity of the sleeve, a connecting rod fixed to one end of the third spring, a locking rod fixed to one end of the connecting rod, and an inclined plate fixed to the bottom of the connecting rod.

[0015] As a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the probe includes an airbag fixed to one side of the inner cavity of the outer shell, a pipe fixed to one side of the airbag, and a one-way pressure valve fixed to the surface of the pipe.

[0016] As a preferred embodiment of the cannula device for temporomandibular arthroscopy access described in this invention, the anti-return element includes a rotating shaft rotatably connected to both sides of the inner cavity of the handle, one end of the rotating shaft is fixed with a third sealing plate, and the other end of the rotating shaft is fitted with a torsion spring, one end of the torsion spring is fixed to the surface of the rotating shaft, and the other end of the torsion spring is fixed to the surface of the handle.

[0017] The beneficial effects of this invention are as follows: the sealing component can seal the inlet and outlet of the flushing tube, length compensator, and injection tube, and the sealing structure can open and close simultaneously, ensuring that only one passage is open during operation, avoiding internal liquid backflow and contamination of the pipeline. Furthermore, the other two passages are closed during operation, preventing the operation from being affected by the other two passages. The overall structure has three positions, allowing for rapid switching of passages simply by manually rotating the turntable, greatly improving the ease of operation for medical personnel. After the passage is closed, automatic air venting and probing can be performed, which is faster than manually probing with a probe, saving surgical time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of the cannula device used for temporomandibular arthroscopy.

[0020] Figure 2 This is a rear view of the cannula device used for temporomandibular arthroscopy.

[0021] Figure 3 This is a partial structural cross-sectional view of the cannula device used for temporomandibular arthroscopy.

[0022] Figure 4 Cannula for Temporomandibular Arthroscopy Figure 3 A magnified view of A in the middle.

[0023] Figure 5 This is a partial structural diagram of the cannula device used for temporomandibular arthroscopy.

[0024] Figure 6 A partial structural diagram of the sealing assembly of the cannula device used for temporomandibular arthroscopy.

[0025] Figure 7 Cannula for Temporomandibular Arthroscopy Figure 6 A magnified view of B in the middle.

[0026] Figure 8 Another structural view of the sealing assembly of the cannula device for temporomandibular arthroscopy.

[0027] Figure 9 Cannula for Temporomandibular Arthroscopy Figure 8 Enlarged view of C

[0028] Figure 10 This is a structural diagram of the check valve component of the cannula device used for temporomandibular arthroscopy.

[0029] Figure 11 An exploded view of the sealing and locking components of the cannula device used for temporomandibular arthroscopy.

[0030] Figure 12 This is a structural diagram of the second stop of the cannula device used for temporomandibular arthroscopy.

[0031] Figure 13 This is a structural diagram of the cannula component of a cannula device used for temporomandibular arthroscopy.

[0032] In the diagram: 1. Sleeve assembly; 11. Handle; 12. Sleeve fitting; 121. First sleeve; 122. Second sleeve; 123. Third sleeve; 13. Sealing cap; 14. Flushing pipe; 15. Length compensator; 16. Injection pipe; 17. Arc baffle; 2. Sealing assembly; 21. Housing; 22. First stop; 221. Rotating rod; 222. First sealing plate; 223. Gear; 23. Seal; 231. First cover plate; 232. Second cover plate; 233. Inclined hole plate; 234. Toothed plate; 24. Second stop; 241. Sliding rod; 242. Second sealing plate; 243. First spring; 244. Cover; 245. Sliding column; 25. Cutting Replacement parts; 251, turntable; 252, connecting rod; 253, marking plate; 254, positioning groove; 26, probe; 261, airbag; 262, pipe; 263, one-way pressure valve; 27, push-pull part; 271, push rod; 272, roller; 273, push-pull plate; 274, fixing plate; 275, positioning rod; 276, second spring; 277, extrusion plate; 28, fastener; 281, housing; 282, third spring; 283, connecting rod; 284, locking rod; 285, inclined plate; 29, check valve; 291, third sealing plate; 292, rotating shaft; 293, torsion spring; 210, sliding plate; 211, support plate; 212, locking hole.

[0033] Specific implementation party

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1, referring to Figure 1 and Figure 2This is the first embodiment of the present invention, which provides a cannula device for temporomandibular joint arthroscopy. The cannula device includes a cannula assembly 1 and a sealing assembly 2. By setting the cannula assembly 1 and the sealing assembly 2, irrigation, endoscopy and injection operations can be performed sequentially during surgery. The entire process is completed by this device, and it can automatically close other passages during operation to prevent backflow of liquid inside the device and cause contamination. Automatic probing is performed after each operation, saving the time of manual probing with a probe in conventional surgery and greatly improving surgical efficiency.

[0038] Specifically, the cannula assembly 1 includes a handle 11, a cannula fitting 12 is provided at one end of the handle 11, a sealing cap 13 is fitted on the top of the handle 11, a flushing tube 14 is fixed on one side of the handle 11, an injection tube 16 is fixed on the other side of the handle 11, and a length compensator 15 is fixed on the top of the sealing cap 13.

[0039] Specifically, the sealing assembly 2 includes a housing 21 fitted around the outer ring of the length compensator 15. A sliding plate 210 is fixed to the top of the housing 21. Support plates 211 are fixed to both sides of the inner cavity of the housing 21. A push-pull member 27 is provided in the inner cavity of the housing 21. A switching member 25 is fixed to one side of the push-pull member 27. A first stop member 22 is provided at the bottom of the sealing cover 13. A second stop member 24 is provided on both sides of the top of the sealing cover 13. A sealing member 23 is provided on the surface of the sliding plate 210. A fastener 28 is provided on the surface of the sealing member 23. A probe member 26 is fixed to one side of the inner cavity of the housing 21. A check member 29 is provided in the inner cavity of the handle 11. A locking hole 212 is provided on both sides of the inner cavity of the housing 21.

[0040] The slide plate 210 is provided with a slide groove for the seal 23 to move. By setting the slide groove, the seal 23 can move stably and avoid shaking during operation. By setting the switching element 25, the open passage can be switched, so that medical personnel can quickly switch to the required passage to perform surgical operations, improve convenience, reduce the number of times the device is disassembled and replaced, and reduce the complexity of the surgical procedure.

[0041] By setting the seal 23, the inlets of the length compensator 15, flushing pipe 14, and injection pipe 16 can be covered, and the inlets of the three can be sealed to prevent external dust from entering the equipment and causing contamination during storage.

[0042] By setting the fastener 28, the seal 23 can be fixed in a designated position, which can prevent the seal 23 from being accidentally displaced during the operation, thus preventing the passage from being opened or closed accidentally, ensuring operational stability and reducing the risk of human error.

[0043] By setting the probe 26, gas can be automatically released to impact the cannula passage after each operation, replacing the manual probe to open the passage, saving operation time, improving operation efficiency, and avoiding damage to the passage caused by manual operation.

[0044] By setting the push-pull component 27, the sealing component 23 can be moved and the airbag 261 can be squeezed, so that sealing and probing can be carried out automatically in sequence, saving manual operation steps and improving the convenience of operation for medical staff.

[0045] By setting the length compensator 15, it can be adapted to endoscope probes of different lengths, meet the probe length requirements in different surgical scenarios, and improve the versatility of the device.

[0046] Example 2, refer to Figures 3-13 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0047] Specifically, it also includes a sleeve 12, which includes a first sleeve 121, which is threaded to the inner cavity of the handle 11, and an arc-shaped baffle 17 is fixed to the inner wall of the handle 11.

[0048] Specifically, the push-pull component 27 includes a push rod 271 slidably connected to both sides of the inner cavity of the outer shell 21. One end of the push rod 271 is movably fitted with a push-pull plate 273. Both ends of the push rod 271 are fixed with a fixing plate 274. A positioning rod 275 is slidably connected to the surface of the fixing plate 274. A second spring 276 is fitted around the outer ring of the positioning rod 275. One end of the second spring 276 is fixed to the surface of the positioning rod 275, and the other end of the second spring 276 is fixed to the surface of the fixing plate 274. A roller 272 is fitted around the outer ring of the push rod 271.

[0049] By setting the push rod 271, it can move stably along the inner cavity of the outer shell 21 under the drive of the push-pull plate 273, thereby driving the roller 272 on the surface of the push rod 271 to move synchronously. By setting the roller 272, the push rod 271 can roll into contact with the inclined plate 285 of the fastener 28 when it moves, reducing the frictional resistance between the two, making the push rod 271 push the fastener 28 to move more smoothly and avoiding jamming. By setting the push-pull plate 273, a convenient force application point can be provided for medical staff, making it easy to control the movement of the push rod 271 by pushing and pulling with their hands, reducing the difficulty of operation.

[0050] Specifically, the switching component 25 includes a turntable 251 fixed to one end of the push rod 271, an identification plate 253 fixed to the outer ring of the turntable 251, a connecting rod 252 rotatably connected to the surface of the turntable 251, a positioning groove 254 opened on one side of the turntable 251, and an extrusion plate 277 fixed to one end of the push rod 271.

[0051] By setting up the turntable 251, the position of the push rod 271 can be adjusted when it rotates, thereby switching the correspondence between the roller 272 and the different channel fasteners 28. By setting up the linkage 252, the two turntables 251 can be linked in opposite directions to ensure that when one turntable 251 drives the push rod 271 to align with the target channel, the other turntable 251 simultaneously drives the corresponding push rod 271 to align with the target channel. By setting up the label plate 253, medical staff can quickly identify the currently opened channel type and avoid operational errors.

[0052] Specifically, the first stop 22 includes a rotating rod 221 rotatably connected to the bottom of the sealing cover 13. One end of the rotating rod 221 is fixed with a first sealing plate 222, and the other end of the rotating rod 221 is fixed with a gear 223.

[0053] By setting the rotating rod 221, the first sealing plate 222 and the gear 223 can rotate synchronously, and the bearing connection ensures that the rotating rod 221 can rotate flexibly without jamming.

[0054] Specifically, the second stop 24 includes a sliding rod 241 slidably connected to the top of the sealing cover 13, a second sealing plate 242 fixed to the bottom of the sliding rod 241, a first spring 243 sleeved on the surface of the sliding rod 241, a cover 244 fixed on both sides of the top of the sealing cover 13, one end of the first spring 243 fixed to the surface of the sliding rod 241, the other end of the first spring 243 fixed to the inner wall of the cover 244, and a sliding post 245 fixed to one end of the sliding rod 241.

[0055] By setting the first spring 243, the sliding rod 241 can be pushed downward by the compression force in the initial state, so that the second sealing plate 242 is kept in a sealed state. When the sliding rod 241 is pushed upward, it stores force. After the pushing force disappears, it automatically drives the sliding rod 241 to reset, so as to realize the automatic closing of the second sealing plate 242.

[0056] By setting the cover 244, a closed protective space can be provided for the sliding rod 241 and the first spring 243, preventing impurities from entering during the operation and affecting the operation of the parts or causing damage to the parts by collision. At the same time, it provides a stable fixed end point for the first spring 243, ensuring that the sliding rod 241 moves in a specific direction.

[0057] Specifically, the sealing element 23 includes a first cover plate 231 slidably connected to the top of the length compensator 15, a second cover plate 232 slidably connected to the top of the flushing pipe 14 and the injection pipe 16, a toothed plate 234 fixed on one side of the first cover plate 231, and oblique hole plates 233 fixed on both the front and rear sides of the second cover plate 232.

[0058] By setting the first cover plate 231, the inlet of the length compensator 15 can be tightly covered when the endoscopic passage is not in use, preventing external dust and impurities from entering the interior of the length compensator 15. By setting the second cover plate 232, the inlet of the corresponding pipeline can be covered when the flushing or injection operation is not started, preventing the unused passage from being connected to the outside and causing pollution.

[0059] Specifically, the fastener 28 includes a housing 281 fixed to both sides of the first cover plate 231 and the second cover plate 232. A third spring 282 is fixed inside the housing 281. A connecting rod 283 is fixed to one end of the third spring 282. A locking rod 284 is fixed to one end of the connecting rod 283. An inclined plate 285 is fixed to the bottom of the connecting rod 283.

[0060] By setting the housing 281, an installation support space can be provided for the third spring 282 and the connecting rod 283. By setting the third spring 282, elastic force can be generated when the locking rod 284 is disengaged from the locking hole 212. When the locking rod 284 moves to the new position of the locking hole 212, it will automatically push the locking rod 284 into place, realizing the rapid positioning and locking of the seal 23. By setting the locking rod 284, it can be locked into the inside of the locking hole 212 to prevent the seal 23 from shifting due to collision or vibration during the surgical operation.

[0061] Specifically, the probe 26 includes an airbag 261 fixed to one side of the inner cavity of the outer shell 21, a pipe 262 fixed to one side of the airbag 261, and a one-way pressure valve 263 fixed to the surface of the pipe 262.

[0062] By setting up an airbag 261, gas can be stored when the push rod 271 drives the extrusion plate 277 to compress. Once the pressure reaches a threshold, the gas is released, allowing it to automatically explore the internal passage of the device. By setting up a pipe 262, the gas released by the airbag 261 can be precisely guided to the sleeve 12 at the bottom of the handle 11. By setting up a one-way pressure valve 263, the gas can be controlled to flow only from the airbag 261 to the sleeve 12, preventing liquid or impurities in the sleeve from flowing back into the airbag 261. At the same time, it ensures that the gas is released only when the extrusion pressure of the airbag 261 reaches the set value, ensuring sufficient exploration force.

[0063] Specifically, the check valve 29 includes a rotating shaft 292 rotatably connected to both sides of the inner cavity of the handle 11. One end of the rotating shaft 292 is fixed with a third sealing plate 291, and the other end of the rotating shaft 292 is fitted with a torsion spring 293. One end of the torsion spring 293 is fixed to the surface of the rotating shaft 292, and the other end of the torsion spring 293 is fixed to the surface of the handle 11.

[0064] The arc-shaped baffle 17 has a semi-circular structure. By setting the arc-shaped baffle 17, the third sealing plate 291 can be blocked, so that it can only be opened from the top downwards, but cannot be opened from the bottom upwards, so that gas will not enter the upper part of the handle 11 during the exploration process.

[0065] By setting the rotating shaft 292, a stable rotation fulcrum can be provided for the third sealing plate 291, ensuring that the third sealing plate 291 can rotate smoothly when the flushing fluid impacts or the torsion spring 293 resets. At the same time, in conjunction with the torsion spring 293, the third sealing plate 291 can be automatically driven to reset and close after the flushing fluid stops being input, preventing the reverse backflow of residual liquid inside the handle 11.

[0066] Example 3, referring to Figures 3-13 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0067] Specifically, the cover 244 is fitted onto the surface of the first spring 243, and the outer ring of the push rod 271 is rotatably connected to the push-pull plate 273 via a bearing.

[0068] Specifically, there are three positioning slots 254, which are evenly distributed on the surface of the turntable 251. One end of the connecting rod 252 is rotatably connected to the top of one side of the turntable 251, and the other end of the connecting rod 252 is rotatably connected to the bottom of one side of the other turntable 251.

[0069] Specifically, a first sealing ring is fixed to the surface of the second sealing plate 242. By setting the first sealing ring, the sealing performance of the second sealing plate 242 at the outlet of the flushing pipe 14 and the injection pipe 16 can be improved. A second sealing ring is fixed to the surface of the first sealing plate 222, which can improve the sealing performance of the first sealing plate 222 at the outlet of the length compensator 15.

[0070] By setting the first sealing ring, when the second sealing plate 242 covers the outlet of the flushing tube 14 and the injection tube 16, the gap between the second sealing plate 242 and the pipeline outlet can be filled, preventing flushing fluid or injection agent from leaking from the gap. By setting the second sealing ring, when the first sealing plate 222 covers the outlet of the length compensator 15, the sealing effect can be enhanced, preventing external impurities from entering or internal gas from leaking when the endoscopic passage is not in use.

[0071] Specifically, the toothed plate 234 is meshed with the gear 223, and the surface of the sliding column 245 is provided with an oblique hole. The sliding column 245 extends into the inner cavity of the oblique hole and slides in contact with its inner wall.

[0072] Specifically, rollers 272 are located on both sides of the inclined plate 285. The rollers 272 are divided into three groups and set on the surface of the push rod 271. The three groups of rollers 272 are evenly distributed on the surface of the push rod 271 at an angle of 120°.

[0073] Specifically, the outlet end of pipe 262 is fixed to the bottom of the surface of handle 11, and one-way pressure valve 263 is located at the outlet of pipe 262.

[0074] Specifically, a sealing treatment is applied between the surface of the rotating shaft 292 and the connection point of the handle 11. The locking holes 212 are divided into three groups, with four locking holes 212 in each group. Two locking holes 212 are located at the locking rod 284, and the other two locking holes 212 are located on one side of the locking rod 284.

[0075] Specifically, the sleeve fitting 12 also includes a second sleeve 122 and a third sleeve 123. The dimensions of the first sleeve 121, the second sleeve 122 and the third sleeve 123 are as follows: the outer diameter of the first sleeve 121 is 3.0 mm and the inner diameter is 2.3 mm; the outer diameter of the second sleeve 122 is 2.8 mm and the inner diameter is 2.1 mm; the dimensions of the third sleeve 123 are the same as those of the second sleeve 122 but the interface is different. The working length of all three is 44 mm.

[0076] When in use, the third sleeve 123 is installed at the bottom of the handle 11. The endoscope is inserted into the skin of the temporomandibular joint. A hole is punctured in the skin with a probe and the hole is enlarged with force. At the same time, it is inserted deeper into the temporomandibular joint. The third sleeve 123 is slipped on one end of the probe and the hole is enlarged with a little force to enter the skin and the temporomandibular joint. In the initial state, the roller 272 on the surface of the push rod 271 is located at the fastener 28 above the quasi-rinse tube 14.

[0077] At this time, the push-pull plate 273 is pushed, and the push-pull plate 273 drives the push rod 271 to move towards the airbag 261, thereby driving the roller 272 to move towards the inclined plate 285 of the fastener 28. When the roller 272 contacts the inclined plate 285, the roller 272 squeezes the inclined surface of the inclined plate 285, causing it to drive the connecting rod 283 to move, thereby driving the locking rod 284 to move out of the locking hole 212, and the third spring 282 is compressed.

[0078] When the locking rod 284 is removed, the roller 272 contacts the protruding part on the surface of the inclined plate 285, preventing the inclined surface on the inclined plate 285 from continuing to move in the direction of the roller 272. When the push rod 271 is pushed, the locking device 28 will move towards the airbag 261. The locking device 28 will cause the second cover plate 232 on the surface of the flushing pipe 14 to move away from the inlet of the flushing pipe 14.

[0079] During the movement of the second cover plate 232, the inclined hole plate 233 will move, and the push rod 271 will drive the extrusion plate 277 to extrude the airbag 261, causing the sliding column 245 inside the inclined hole plate 233 to move upward inside the inclined hole, thereby driving the sliding rod 241 to move upward, so that the second sealing plate 242 is removed from the outlet of the flushing pipe 14. When the locking rod 284 moves to the locking hole 212 on the other side, the locking rod 284 is locked into the locking hole 212 at the current position for re-fixing, and the third spring 282 is reset. At this time, the outlet and inlet of the flushing pipe 14 are fully opened.

[0080] The flushing pump introduces flushing fluid into the flushing pipe 14 to flush the enlarged hole position. After the flushing fluid enters the handle 11, it impacts the third sealing plate 291, causing it to rotate. This allows the flushing fluid to be discharged into the enlarged hole position through the third sleeve 123. After flushing, the probe is removed, and the push-pull plate 273 is pushed a short distance further, causing the airbag 261 to be squeezed to its maximum state. The one-way pressure valve 263 reaches the threshold and opens, allowing the gas inside the airbag 261 to be discharged into the handle 11 through the pipe 262. This allows the airbag to impact and probe the third sleeve 123 at the bottom, preventing blockage.

[0081] Then, push rod 271 is reset, closing the outlet and inlet of flushing pipe 14 again. Then, turntable 251 is rotated 120°, causing roller 272 located at length compensator 15 to rotate to the position of inclined plate 285 at length compensator 15. At this time, turntable 251 on the other side rotates in the opposite direction under the action of connecting rod 252, rotating roller 272 on the surface of another push rod 271 to the position of inclined plate 285 at length compensator 15. Then, push-pull plate 273 is pushed again, opening the first cover plate 231 from the inlet of length compensator 15. The first cover plate 231 drives toothed plate 234 to move, causing gear 223 to rotate, thereby driving rotating rod 221 to rotate, opening the first sealing plate 222 from the outlet of length compensator 15.

[0082] At this point, the endoscope probe can be inserted for operation. If the third sleeve 123 is not thick enough, the probe needs to be used to enlarge the hole. Reinsert the probe into the sleeve and first use the third sleeve 123 and the probe to perform the enlargement operation simultaneously. After enlarging the hole, replace the third sleeve 123 with the second sleeve 122. When inserting the second sleeve 122, you also need to apply a little force to enlarge the hole so that the sleeve can enter the skin and temporomandibular joint. At this time, pull out the probe and insert the endoscope probe through the length compensator 15. If the second sleeve 122 is still not thick enough, you need to continue the enlargement operation, insert the probe again, and repeat the above operation. At this time, the first sleeve 121 needs to replace the second sleeve 122.

[0083] After the endoscopy is completed, the probe 26 repeats the above probing steps to perform one probing, resets the push-pull plate 273, and continues to rotate the turntable 251 by 120°, so that the roller 272 located at the injection tube 16 rotates to the position of the inclined plate 285 at the injection tube 16. Then, it continues to push, and the push-pull plate 273 can open the inlet and outlet of the injection tube 16 at the same time, and then the injection operation can be performed. After the injection is completed, the probe 26 repeats the above steps to perform one probing, and then resets the push-pull plate 273, so that all components are reset to their original state.

[0084] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A cannula device for temporomandibular arthroscopy, characterized in that: include, The cannula assembly (1) includes a handle (11), one end of which is provided with a cannula fitting (12), a sealing cap (13) fitted onto the top of the handle (11), a flushing tube (14) fixed to one side of the handle (11), an injection tube (16) fixed to the other side of the handle (11), and a length compensator (15) fixed to the top of the sealing cap (13). The sealing assembly (2) includes a housing (21) fitted around the outer ring of the length compensator (15). A sliding plate (210) is fixed to the top of the housing (21). Support plates (211) are fixed to both sides of the inner cavity of the housing (21). A push-pull member (27) is provided in the inner cavity of the housing (21). A switching member (25) is fixed to one side of the push-pull member (27). A first stop (22) is provided at the bottom of the sealing cover (13). A second stop (24) is provided on both sides of the top of the sealing cover (13). A sealing member (23) is provided on the surface of the sliding plate (210). A fastener (28) is provided on the surface of the sealing member (23). A probe (26) is fixed to one side of the inner cavity of the housing (21). A check valve (29) is provided in the inner cavity of the handle (11). A locking hole (212) is provided on both sides of the inner cavity of the housing (21).

2. The cannula device for temporomandibular arthroscopy as described in claim 1, characterized in that: The sleeve (12) includes a first sleeve (121), which is threaded to the inner cavity of the handle (11), and an arc-shaped baffle (17) is fixed to the inner wall of the handle (11).

3. The cannula device for temporomandibular arthroscopy as described in claim 2, characterized in that: The push-pull component (27) includes a push rod (271) slidably connected to both sides of the inner cavity of the outer shell (21). One end of the push rod (271) is movably fitted with a push-pull plate (273). Both ends of the push rod (271) are fixed with a fixing plate (274). A positioning rod (275) is slidably connected to the surface of the fixing plate (274). A second spring (276) is fitted on the outer ring of the positioning rod (275). One end of the second spring (276) is fixed to the surface of the positioning rod (275), and the other end of the second spring (276) is fixed to the surface of the fixing plate (274). A roller (272) is fitted on the outer ring of the push rod (271).

4. The cannula device for temporomandibular arthroscopy as described in claim 3, characterized in that: The switching component (25) includes a turntable (251) fixed to one end of a push rod (271), an identification plate (253) fixed on the outer ring of the turntable (251), a connecting rod (252) rotatably connected to the surface of the turntable (251), a positioning groove (254) is provided on one side of the turntable (251), and an extrusion plate (277) is fixed to one end of the push rod (271).

5. The cannula device for temporomandibular arthroscopy as described in claim 4, characterized in that: The first stop (22) includes a rotating rod (221) rotatably connected to the bottom of the sealing cover (13). One end of the rotating rod (221) is fixed with a first sealing plate (222), and the other end of the rotating rod (221) is fixed with a gear (223).

6. The cannula device for temporomandibular arthroscopy as described in claim 5, characterized in that: The second stop (24) includes a sliding rod (241) slidably connected to the top of the sealing cover (13). A second sealing plate (242) is fixed to the bottom of the sliding rod (241). A first spring (243) is sleeved on the surface of the sliding rod (241). A cover (244) is fixed on both sides of the top of the sealing cover (13). One end of the first spring (243) is fixed to the surface of the sliding rod (241), and the other end of the first spring (243) is fixed to the inner wall of the cover (244). A sliding column (245) is fixed to one end of the sliding rod (241).

7. The cannula device for temporomandibular arthroscopy as described in claim 6, characterized in that: The sealing element (23) includes a first cover plate (231) slidably connected to the top of the length compensator (15), and a second cover plate (232) slidably connected to the top of the flushing pipe (14) and the injection pipe (16). A toothed plate (234) is fixed on one side of the first cover plate (231), and oblique hole plates (233) are fixed on both the front and rear sides of the second cover plate (232).

8. The cannula device for temporomandibular arthroscopy as described in claim 7, characterized in that: The fastener (28) includes a housing (281) fixed to both sides of the first cover plate (231) and the second cover plate (232). A third spring (282) is fixed in the inner cavity of the housing (281). A connecting rod (283) is fixed to one end of the third spring (282). A locking rod (284) is fixed to one end of the connecting rod (283). An inclined plate (285) is fixed to the bottom of the connecting rod (283).

9. The cannula device for temporomandibular arthroscopy as described in claim 8, characterized in that: The probe (26) includes an airbag (261) fixed to one side of the inner cavity of the outer shell (21), a pipe (262) fixed to one side of the airbag (261), and a one-way pressure valve (263) fixed to the surface of the pipe (262).

10. The cannula device for temporomandibular arthroscopy as described in claim 9, characterized in that: The check valve (29) includes a rotating shaft (292) rotatably connected to both sides of the inner cavity of the handle (11). One end of the rotating shaft (292) is fixed with a third sealing plate (291), and the other end of the rotating shaft (292) is fitted with a torsion spring (293). One end of the torsion spring (293) is fixed to the surface of the rotating shaft (292), and the other end of the torsion spring (293) is fixed to the surface of the handle (11).

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