Joint cavity flushing device for temporomandibular joint

Abstract

The invention relates to the technical field of medical instruments, and discloses a temporal-mandibular joint cavity flushing device which comprises a main body mechanism. Comprising a device shell, a piston cylinder body arranged on the inner wall of the device shell, a driving rod arranged on the inner side of the piston cylinder body, a piston plate arranged at the end of the driving rod, a mounting assembly arranged at the end of the device shell and a needle tube assembly arranged on the mounting assembly. And an adjusting mechanism. Opening and closing adjustment of a side needle hole is achieved through relative rotation of the outer needle tube and the inner needle tube, rotary cutting is matched with a cutting blade, the problem that the needle hole is blocked in the flushing process is effectively solved, lifting of a protection support is achieved through thread transmission of the protection assembly, the puncture depth can be controlled, the needle head can be protected, and the sealing assembly is reset through a spring. And the locking assembly is matched with a clamping block through a limiting pin, so that the state of the side needle hole is stably locked, and a doctor is effectively prevented from touching the side needle hole by mistake.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to a joint cavity irrigation device for the temporomandibular joint. Background Technology

[0002] Joint lavage is a common clinical treatment for temporomandibular joint disorder. It mainly involves injecting lavage fluid into the joint cavity to remove effusion, inflammatory mediators, and adhesions, thereby relieving pain and improving joint function. The temporomandibular joint lavage device is the main equipment for this treatment.

[0003] Traditional temporomandibular joint irrigation devices have a single irrigation mode, making it difficult to flexibly adjust the irrigation range according to the location of the lesion. Furthermore, the precision of puncture depth control is insufficient, which can easily cause tissue damage due to improper operation. During use, the needle can easily become blocked by adhesions inside the joint cavity, requiring the device to be stopped and cleaned to continue use, thus affecting the continuity of the operation. In addition, after the needle is disassembled, the sealing performance of the syringe is poor, and the inside is easily contaminated, reducing the efficiency and safety of clinical operation and making it difficult to meet the needs of precise treatment. Summary of the Invention

[0004] In view of the problems existing in the joint cavity irrigation devices for the temporomandibular joint, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a joint cavity irrigation device for the temporomandibular joint.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including, The main structure includes a device housing, a piston cylinder disposed on the inner wall of the device housing, a drive rod disposed on the inner side of the piston cylinder, a piston plate disposed at the end of the drive rod, a mounting assembly disposed at the end of the device housing, and a needle assembly disposed on the mounting assembly; and, The adjustment mechanism includes a protective assembly disposed between the device housing and the piston cylinder, a sealing assembly disposed between the device housing and the mounting assembly, and a locking assembly disposed on the inner wall of the mounting assembly.

[0007] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the mounting assembly includes a mounting sleeve disposed at the end of the device housing, an outer tube mounting seat disposed inside the mounting sleeve, a switching knob disposed on one side of the outer tube mounting seat, a support plate disposed at the bottom of the outer tube mounting seat, and a mounting groove formed at the end of the device housing.

[0008] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the needle assembly includes an outer needle tube installed on the end face of the outer tube mounting seat, an inner needle tube disposed on the inner wall of the outer tube mounting seat, and a cutting blade disposed on the inner wall of the outer needle tube.

[0009] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the needle assembly further includes a front needle hole opened at the end of the outer needle tube, and a side needle hole that passes through both the outer needle tube and the inner needle tube.

[0010] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the protective component includes a drive ring rotatably sleeved on the outer surface of the device housing, a transmission roller disposed on the inner surface of the device housing, and an internally threaded sleeve disposed on the inner wall of the device housing.

[0011] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the protective component further includes a threaded cylinder disposed inside the inner threaded sleeve, and a protective bracket disposed on the top of the threaded cylinder.

[0012] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the sealing assembly includes a bearing slip ring disposed on the outer shell of the device, two guide posts disposed at the bottom of the bearing slip ring, and a limiting ring slidably sleeved on the outer surface of the guide posts, wherein the limiting ring is disposed on the inner wall of the top of the outer shell of the device.

[0013] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the sealing assembly further includes a sealing plate disposed at the bottom of the two guide posts, and a first return spring sleeved on the outer surface of the guide posts.

[0014] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the locking component includes a mounting bracket disposed on the inner wall of the outer tube mounting base, a limiting pin passing through the mounting bracket and slidingly contacting its inner surface, and a positioning piece disposed on the top of the limiting pin.

[0015] As a preferred embodiment of the temporomandibular joint cavity irrigation device of the present invention, the locking component further includes a second return spring sleeved on the outer surface of the limiting pin, and two limiting blocks disposed on the top of the bearing plate. The top of the limiting block has an arc surface that matches the bottom of the limiting pin.

[0016] The beneficial effects of this invention are as follows: By rotating the outer and inner needle tubes relative to each other, the opening and closing of the side needle hole can be adjusted. Combined with the rotating cutting blade, this effectively solves the problem of needle hole blockage during irrigation. The protective component uses a threaded drive to raise and lower the protective bracket, which can control the puncture depth and protect the needle. The sealing component uses a spring to reset and automatically closes the opening when disassembled, ensuring internal sterility. The locking component uses a limit pin and a locking block to stably lock the side needle hole, effectively preventing doctors from accidentally touching it. The overall device allows for flexible adjustment of the irrigation mode, improving operational safety and effectiveness. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. 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. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention.

[0019] Figure 3 This is a partial structural diagram of the main body of the present invention.

[0020] Figure 4 This is a partial cross-sectional schematic diagram of the main structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the installation component structure of the present invention.

[0022] Figure 6 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle.

[0023] Figure 7 This is a schematic diagram of the explosion of the protective component of the present invention.

[0024] Figure 8 This is a schematic diagram of the protective component of the present invention from another angle of explosion.

[0025] Figure 9 This is an exploded view of the sealing assembly of the present invention.

[0026] Figure 10 This is an exploded view of the mounting components of the present invention.

[0027] Figure 11 This is a schematic diagram of the locking component structure of the present invention.

[0028] 100. Main body; 101. Device housing; 102. Piston cylinder; 103. Drive rod; 104. Piston plate; 105. Mounting assembly; 105a. Mounting sleeve; 105b. Outer tube mounting base; 105c. Switching knob; 105d. Carrier plate; 105e. Mounting groove; 106. Needle assembly; 106a. Outer needle tube; 106b. Inner needle tube; 106c. Cutting blade; 106d. Positive needle hole; 106e. Side needle hole; 200. Adjustment mechanism; 201 1. Protective components; 201a. Drive ring; 201b. Transmission roller; 201c. Internal threaded sleeve; 201d. Threaded cylinder; 201e. Protective bracket; 202. Sealing components; 202a. Load-bearing slip ring; 202b. Guide post; 202c. Limiting ring; 202d. Sealing plate; 202e. First return spring; 203. Locking components; 203a. Mounting bracket; 203b. Limiting pin; 203c. Positioning piece; 203d. Second return spring; 203e. Limiting block. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0033] Example 1 Reference Figure 1-9 As a first embodiment of the present invention, a joint cavity irrigation device for the temporomandibular joint is provided, the device comprising, The main body 100 includes a device housing 101, a piston cylinder 102 disposed on the inner wall of the device housing 101, a drive rod 103 disposed inside the piston cylinder 102, a piston plate 104 disposed at the end of the drive rod 103, a mounting assembly 105 disposed at the end of the device housing 101, and a needle assembly 106 disposed on the mounting assembly 105; and, The adjustment mechanism 200 includes a protective component 201 disposed between the device housing 101 and the piston cylinder 102, and a sealing component 202 disposed between the device housing 101 and the mounting component 105.

[0034] It should be noted that the outer shell 101 of the device is a cylindrical hollow structure, and a piston cylinder 102 is fixedly installed on its inner wall. The piston cylinder 102 is equipped with a reciprocating drive rod 103 inside. One end of the drive rod 103 is connected to the piston plate 104, and the other end is equipped with a push plate for easy operation by doctors. The mounting assembly 105 is used to install the needle assembly 106. The piston plate 104 is sealed to the inner wall of the piston cylinder 102 for injecting or withdrawing the drug solution into or from the patient's body through the needle assembly 106.

[0035] Specifically, the mounting assembly 105 includes a mounting sleeve 105a disposed at the end of the device housing 101, an outer tube mounting seat 105b disposed inside the mounting sleeve 105a, a switching knob 105c disposed on one side of the outer tube mounting seat 105b, a support plate 105d disposed at the bottom of the outer tube mounting seat 105b, and a mounting groove 105e opened at the end of the device housing 101.

[0036] It should be noted that an operating groove is provided on one side of the mounting sleeve 105a. The bearing plate 105d is fixedly connected to the mounting sleeve 105a and slides in contact with the outer tube mounting seat 105b. The outer surface of the outer tube mounting seat 105b slides in fit with the inner surface of the mounting sleeve 105a. The rotation adjustment of the outer tube mounting seat 105b can be achieved by turning the switching knob 105c. The outer side of the bearing plate 105d is provided with a threaded protrusion, and the inner wall of the mounting groove 105e is provided with a threaded groove that engages with it. The bearing plate 105d can be aligned with the mounting groove 105e and then the mounting sleeve 105a can be turned to achieve quick removal and fixation of the mounting component 105.

[0037] Furthermore, the needle assembly 106 includes an outer needle tube 106a mounted on the end face of the outer tube mounting base 105b, an inner needle tube 106b disposed on the inner wall of the outer tube mounting base 105b, and a cutting blade 106c disposed on the inner wall of the outer needle tube 106a.

[0038] Furthermore, the needle assembly 106 also includes a front needle hole 106d opened at the end of the outer needle tube 106a, and a side needle hole 106e that passes through both the outer needle tube 106a and the inner needle tube 106b.

[0039] It should be noted that the inner needle tube 106b and the outer needle tube 106a are coaxially arranged and can rotate relative to each other. The inner wall of the outer needle tube 106a and the outer surface of the inner needle tube 106b are sealed together. The side needle hole 106e passes through both of them. The inner wall of the outer needle tube 106a is also provided with a cutting blade 106c to prevent adhesions in the joint cavity from being sucked into the needle tube and causing blockage. The top of the inner needle tube 106b is connected to the outer needle tube 106a. The medicine can enter the inner needle tube 106b through the positive needle hole 106d. Rotating the outer needle tube 106a can block or open the side needle hole 106e on the inner needle tube 106b, thereby opening and closing the side needle hole 106e.

[0040] The protective component 201 includes a drive ring 201a rotatably sleeved on the outer surface of the device housing 101, a transmission roller 201b disposed on the inner surface of the device housing 101, and an internal threaded sleeve 201c disposed on the inner wall of the device housing 101.

[0041] It should be noted that the outer surface of the drive ring 201a is provided with a rubber anti-slip pad, which facilitates the doctor's adjustment of the protective component 201. The inner side of the drive ring 201a is provided with several transmission bosses that mesh with the transmission roller 201b. The outer surface of the inner threaded sleeve 201c is also provided with several transmission bosses that mesh with the transmission roller 201b. Rotating the drive ring 201a can drive the transmission roller 201b to rotate through the transmission bosses, thereby driving the inner threaded sleeve 201c to rotate.

[0042] Preferably, the protective assembly 201 further includes a threaded cylinder 201d disposed inside the inner threaded sleeve 201c, and a protective bracket 201e disposed on the top of the threaded cylinder 201d.

[0043] It should be noted that the inner threaded sleeve 201c is threadedly engaged with the threaded cylinder 201d. The inner side of the threaded cylinder 201d is provided with a lifting guide groove to prevent it from rotating. When the inner threaded sleeve 201c rotates, it drives the threaded cylinder 201d to rise and fall, which in turn drives the connecting protective bracket 201e at the top of the threaded cylinder 201d to rise and fall. This bracket is used to control the length of the needle assembly 106 entering the patient's body during use, and to extend out to protect the needle assembly 106 when not in use.

[0044] Specifically, the sealing assembly 202 includes a bearing slip ring 202a disposed on the device housing 101, two guide posts 202b disposed at the bottom of the bearing slip ring 202a, and a limiting ring 202c slidably sleeved on the outer surface of the guide posts 202b, the limiting ring 202c being disposed on the top inner wall of the device housing 101.

[0045] Furthermore, the sealing assembly 202 also includes a sealing plate 202d disposed at the bottom of the two guide posts 202b, and a first return spring 202e sleeved on the outer surface of the guide posts 202b.

[0046] It should be noted that the limiting ring 202c is fixed to the inner wall of the top of the device housing 101. The two ends of the first return spring 202e are in contact with the top of the limiting ring 202c and the bottom of the bearing slip ring 202a, respectively. A rubber sealing ring is provided on the top of the sealing plate 202d. When the mounting assembly 105 is not installed, the first return spring 202e pushes the bearing slip ring 202a upward. The bearing slip ring 202a drives the sealing plate 202d to move upward through the guide post 202b, blocking the opening in the middle of the top of the device housing 101 used to connect the inner needle tube. The opening of 106b prevents the piston cylinder 102 from being contaminated. When the mounting assembly 105 is installed, the bearing plate 105d presses down on the bearing slip ring 202a, which in turn drives the sealing plate 202d to move downward through the guide post 202b. At this time, the sealing plate 202d is dislodged from the opening in the middle of the top of the device housing 101, and the inner needle tube 106b is reconnected to the inner cavity of the device housing 101. If it is necessary to drain the waste liquid in the inner cavity of the piston cylinder 102, simply press the bearing slip ring 202a downward manually when the mounting assembly 105 is not installed.

[0047] In use, the doctor first installs the mounting component 105 onto the device housing 101 via the threaded engagement of the support plate 105d and the mounting groove 105e. During installation, the support plate 105d presses against the support slip ring 202a, causing the sealing plate 202d to move downwards, thus connecting the inner needle tube 106b with the inner cavity of the device housing 101. When rinsing the joint cavity, the drive ring 201a is rotated according to the position of the patient's joint cavity, which drives the inner threaded sleeve 201c to rotate via the transmission roller 201b, thereby causing the threaded cylinder 201d to move the protective bracket 201e up and down. During use, the protective bracket 201e rests against the patient's skin surface, controlling the length of the needle tube assembly 106 that can enter the body; When increasing the flushing area, the angle of the outer tube mounting base 105b is adjusted by turning the switching knob 105c. When the outer tube mounting base 105b rotates, it drives the outer needle tube 106a to rotate, thereby controlling the opening or closing of the side needle hole 106e. Then, the drive rod 103 is operated to make the piston plate 104 move in the piston cylinder 102, injecting the flushing fluid into the joint cavity through the positive needle hole 106d and the side needle hole 106e on the inner needle tube 106b and the outer needle tube 106a, or extracting the fluid in the joint cavity. When the positive needle hole 106d is blocked, the switching knob 105c can be turned repeatedly to drive the cutting blade 106c in the outer needle tube 106a to rotate, cutting the adhesion tissue and preventing the needle tube from being blocked. After rinsing, reverse the installation sleeve 105a and remove the needle assembly 106 by removing the installation component 105. The sealing plate 202d is reset under the action of the first return spring 202e, sealing the opening of the device housing 101 to prevent contamination of the piston cylinder 102. When it is necessary to discharge waste liquid, the bearing slip ring 202a can be pressed manually, and the sealing plate 202d will leave the opening of the device housing 101, and the waste liquid can be discharged from the opening of the device housing 101.

[0048] In summary, the rotatable switching design of the needle assembly 106 enables adjustment of the flushing mode. The relative rotation of the outer needle tube 106a and the inner needle tube 106b controls the opening and closing of the side needle hole 106e. Combined with the rotational cutting action of the built-in cutting blade 106c, the problem of needle hole blockage during flushing is effectively solved. The protective assembly 201 achieves precise lifting and lowering adjustment of the protective bracket 201e through a threaded transmission mechanism, which can control the puncture depth during treatment and protect the needle when not in use. The sealing assembly 202 adopts a spring return structure, which automatically closes the device opening when the installation assembly 105 is disassembled, ensuring a sterile internal environment. The entire device can accurately locate the depth during needle insertion through the protective bracket 201e, and can be rotated to clear blockages immediately. It can also be quickly disassembled and cleaned after treatment. This integrated design ensures the safety and effectiveness of the treatment process and greatly improves the convenience of clinical operation.

[0049] Example 2 Reference Figure 10-11 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that this embodiment provides a locking component 203 for the temporomandibular joint cavity irrigation device based on the first embodiment, which solves the problem that the device cannot be fixed after the opening and closing of the switching side pinhole 106e and that switching is easily caused by accidental touch.

[0050] The adjustment mechanism 200 also includes a locking component 203 disposed on the inner wall of the mounting component 105.

[0051] Furthermore, the locking component 203 includes a mounting bracket 203a disposed on the inner wall of the outer tube mounting base 105b, a limiting pin 203b passing through the mounting bracket 203a and slidingly contacting its inner surface, and a positioning piece 203c disposed on the top of the limiting pin 203b.

[0052] Furthermore, the locking assembly 203 also includes a second return spring 203d sleeved on the outer surface of the limit pin 203b, and two limit blocks 203e disposed on the top of the support plate 105d; The top of the limiting block 203e has an arc surface that matches the bottom of the limiting pin 203b.

[0053] It should be noted that the second return spring 203d is sleeved on the outside of the limit pin 203b, providing a return force so that the limit pin 203b remains locked when not subjected to external force. The limit block 203e is located on the top of the bearing plate 105d, and its top has an arc surface that fits with the bottom of the limit pin 203b, forming a stable locking structure. When the switching knob 105c is turned, the limit pin 203b is moved to the limit block 203e through the outer tube mounting seat 105b and locked. At this time, more force is required until the limit pin 203b is pushed upward by the limit block 203e beyond the height of the limit pin 203b, the lock is released, and the outer tube mounting seat 105b can rotate normally.

[0054] When using the device, if the doctor needs to switch the opening and closing state of the side needle hole 106e, he only needs to turn the switching knob 105c. When the limit pin 203b passes the first limit block 203e, it will overcome the elastic force of the second return spring 203d and move upward, releasing the locked state. When it continues to rotate and passes the second limit block 203e, the limit pin 203b needs to overcome the elastic force of the second return spring 203d again and move upward. After passing the second limit block 203e, it will be re-engaged under the action of the spring, realizing a new lock. At this time, one side of the switching knob 105c is locked in the side wall of the slot of the installation sleeve, and the other side is locked with the limit block 203e through the limit pin 203b.

[0055] In summary, Example 2 adds a locking component 203 to Example 1. Through the cooperation of the limiting pin 203b, the limiting block 203e, and the second reset spring 203d, stable locking is achieved after the side needle hole 106e is adjusted. This further improves the stability and reliability of the device operation, ensuring clear gear position and convenient switching, and effectively preventing mode switching caused by accidental touch during treatment. This ensures the stability and reliability of the rinsing process, making the device safer and more practical in clinical use.

[0056] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0057] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0058] 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 joint cavity irrigation device for the temporomandibular joint, characterized in that: include, The main body (100) includes a device housing (101), a piston cylinder (102) disposed on the inner wall of the device housing (101), a drive rod (103) disposed on the inner side of the piston cylinder (102), a piston plate (104) disposed at the end of the drive rod (103), a mounting assembly (105) disposed at the end of the device housing (101), and a needle assembly (106) disposed on the mounting assembly (105); and, The adjustment mechanism (200) includes a protective component (201) disposed between the device housing (101) and the piston cylinder (102), a sealing component (202) disposed between the device housing (101) and the mounting component (105), and a locking component (203) disposed on the inner wall of the mounting component (105).

2. The temporomandibular joint cavity irrigation device according to claim 1, characterized in that: The mounting assembly (105) includes a mounting sleeve (105a) disposed at the end of the device housing (101), an outer tube mounting seat (105b) disposed inside the mounting sleeve (105a), a switching knob (105c) disposed on one side of the outer tube mounting seat (105b), a support plate (105d) disposed at the bottom of the outer tube mounting seat (105b), and a mounting groove (105e) formed at the end of the device housing (101).

3. The temporomandibular joint cavity irrigation device according to claim 2, characterized in that: The needle assembly (106) includes an outer needle tube (106a) mounted on the end face of the outer tube mounting base (105b), an inner needle tube (106b) disposed on the inner wall of the outer tube mounting base (105b), and a cutting blade (106c) disposed on the inner wall of the outer needle tube (106a).

4. The temporomandibular joint cavity irrigation device according to claim 3, characterized in that: The needle assembly (106) also includes a front needle hole (106d) opened at the end of the outer needle tube (106a) and a side needle hole (106e) that passes through both the outer needle tube (106a) and the inner needle tube (106b).

5. The temporomandibular joint cavity irrigation device according to claim 4, characterized in that: The protective assembly (201) includes a drive ring (201a) rotatably sleeved on the outer surface of the device housing (101), a transmission roller (201b) disposed on the inner surface of the device housing (101), and an internal threaded sleeve (201c) disposed on the inner wall of the device housing (101).

6. The temporomandibular joint cavity irrigation device according to claim 5, characterized in that: The protective assembly (201) further includes a threaded cylinder (201d) disposed inside the inner threaded sleeve (201c) and a protective bracket (201e) disposed on the top of the threaded cylinder (201d).

7. The temporomandibular joint cavity irrigation device according to claim 6, characterized in that: The sealing assembly (202) includes a bearing slip ring (202a) disposed on the device housing (101), two guide posts (202b) disposed at the bottom of the bearing slip ring (202a), and a limiting ring (202c) slidably sleeved on the outer surface of the guide posts (202b), the limiting ring (202c) being disposed on the top inner wall of the device housing (101).

8. The temporomandibular joint cavity irrigation device according to claim 7, characterized in that: The sealing assembly (202) further includes a sealing plate (202d) disposed at the bottom of the two guide posts (202b) and a first return spring (202e) sleeved on the outer surface of the guide posts (202b).

9. The temporomandibular joint cavity irrigation device according to claim 8, characterized in that: The locking assembly (203) includes a mounting bracket (203a) disposed on the inner wall of the outer tube mounting base (105b), a limiting pin (203b) passing through the mounting bracket (203a) and slidingly contacting its inner surface, and a positioning piece (203c) disposed on the top of the limiting pin (203b).

10. The temporomandibular joint cavity irrigation device according to claim 9, characterized in that: The locking assembly (203) also includes a second return spring (203d) sleeved on the outer surface of the limiting pin (203b), and two limiting blocks (203e) disposed on the top of the bearing plate (105d). The top of the limiting block (203e) is provided with an arc surface that matches the bottom of the limiting pin (203b).

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