Double-channel endoscope working sleeve

Abstract

The invention discloses a double-channel endoscope working cannula, and belongs to the technical field of endoscopic surgery, the double-channel endoscope working cannula comprises an arc-shaped frame, and the arc-shaped frame is slidably connected with two moving mechanisms; adjusting mechanisms are mounted at the front ends of the two moving mechanisms, and fixing mechanisms are mounted on the two adjusting mechanisms; and a main sleeve and an auxiliary sleeve are respectively arranged in the two fixing mechanisms. By designing the arc-shaped frame and the moving mechanism, the device can slide at will, rapid limiting and clamping are achieved, the distance between the main sleeve and the auxiliary sleeve can be accurately adjusted, a doctor can conveniently conduct surgical operation, meanwhile, follow-up endoscopes and surgical instruments can be conveniently and accurately inserted into the body of a patient, the surgical effect is improved, and the working efficiency is improved. Meanwhile, the angles of the main sleeve and the auxiliary sleeve inserted into the body of the patient are adjusted according to specific requirements, subsequent surgical treatment of the patient by a doctor is facilitated, and the surgical efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of endoscopic surgery, and in particular relates to a double-channel endoscope working sleeve. Background Art

[0002] A dual-channel endoscope is a medical endoscope equipped with two independent working channels, allowing doctors to simultaneously insert multiple instruments (such as forceps, electrocautery, and suction tubes) during minimally invasive surgery or examinations. Its designs are divided into rigid endoscopes (such as laparoscopes and thoracoscopes) and flexible endoscopes (such as gastroenteroscopes and bronchoscopes). It is widely used in gastroenterology (such as polypectomy and ERCP), surgery (such as gallbladder surgery), and respiratory medicine (such as bronchial biopsy). The advantage of dual channels is that they reduce instrument switching, improve surgical efficiency, and support complex operations (such as simultaneous hemostasis and suction). The main channel (endoscope channel) is used to place the endoscope (with a camera and light source), providing a real-time high-definition field of view. The secondary channel (instrument channel) is used specifically for inserting surgical instruments (such as nucleus pulposus forceps, curettes, laser fibers, bipolar coagulation, etc.).

[0003] Existing dual-channel endoscope cannulas are usually integrated, easy to operate, requiring only a single puncture, reducing patient pain, but they are less flexible and cannot meet different surgical needs. Moreover, the existing split dual-channel endoscope cannula structure design is too simple. During surgery, the doctor needs to pick up the main cannula and the auxiliary cannula with both hands respectively, making it impossible to pick up other surgical tools during the operation. The cooperation of medical staff is required, which reduces the efficiency of the operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a dual-channel endoscope working cannula.

[0005] The technical solution adopted to solve the above technical problems is: a dual-channel endoscope working sleeve, comprising an arc-shaped frame, on which two moving mechanisms are slidably connected; The front ends of the two moving mechanisms are both equipped with adjustment mechanisms, and the two adjustment mechanisms are both equipped with fixing mechanisms; A main sleeve and a secondary sleeve are respectively provided in the two fixing mechanisms.

[0006] Furthermore, a handle is fixedly connected to the top center of the arc frame, a first scale is provided at the rear end of the arc frame, an arc-shaped rack is installed inside the arc frame, and a limiting groove is provided at the bottom of the arc frame.

[0007] Through the above technical solution, when performing endoscopic surgery, after installing the main sleeve and the auxiliary sleeve, the doctor can pick up the entire device through the handle with one hand, and perform surgical mechanical operations on the patient's body through the auxiliary sleeve with the other hand, reducing the steps of medical staff transferring surgical tools and improving surgical efficiency. The first scale is used to adjust the angle of the main sleeve and the auxiliary sleeve. When moving the moving mechanism, the specified distance and angle that need to be adjusted are observed through the first scale, thereby facilitating the precise insertion of the endoscope and surgical instruments into the patient's body and improving surgical efficiency.

[0008] Furthermore, the moving mechanism includes a moving shell slidably connected to the outer wall of the arc frame, a first pointer is provided at the rear end center of the moving shell, a limiting column is provided at the inner center of the moving shell, the top end of the limiting column is fixedly connected to a mounting plate, the outer wall of the limiting column is sleeved with a first spring, and the bottom front end of the mounting plate is fixedly connected to a limiting tooth.

[0009] Through the above technical solution, when the movable shell needs to be moved to the specified position, the limit column is pushed so that the limit column pushes the connected mounting plate, thereby pushing the connected limit tooth, so that the limit tooth is separated from the arc-shaped rack, and the movable shell is slid to the specified position, that is, the distance between the main sleeve and the auxiliary sleeve, and the limit column is released. Under the action of the first spring, the mounting plate is reset, driving the limit tooth to engage with the arc-shaped rack. Each tooth in the arc-shaped rack corresponds to one degree. Therefore, when the limit tooth engages with the arc-shaped rack, the distance between the main sleeve and the auxiliary sleeve can be accurately adjusted, which is convenient for the doctor's surgical operation, and also facilitates the subsequent endoscope and surgical instruments to be accurately inserted into the patient's body, thereby improving the surgical effect.

[0010] Furthermore, the limiting column passes through the bottom of the movable shell and is slidably connected to the limiting groove. The top of the first spring is fixedly connected to the mounting plate, and the bottom end thereof is fixedly connected to the movable shell. The limiting tooth engages with the arc-shaped rack.

[0011] Through the above technical solution, the first spring can help the limit column reset, thereby facilitating the next adjustment. The entire movable shell can slide freely and can be quickly limited and clamped with high precision, which greatly improves the efficiency of the operation.

[0012] Furthermore, the adjustment mechanism includes a circular sleeve fixedly connected to the front end of the movable shell, the front and rear ends of the outer wall of the circular sleeve are provided with arc grooves, the front end of the circular sleeve is provided with a second scale, the center of the outer wall of the circular sleeve is fixedly connected to a worm gear, the outer wall of the circular sleeve is slidably connected to an adjustment block, the front bottom of the adjustment block is fixedly connected to a second pointer, the front and rear ends of the bottom of the adjustment block are fixedly connected to a limit pin, the bottom ends of the outer walls of the two adjustment blocks are fixedly connected to a connecting block, a worm is installed inside the adjustment block, and one end of the worm is fixedly connected to the first rotating head.

[0013] Through the above technical solution, after the moving mechanism is adjusted, when it is necessary to adjust the insertion angle of the main sleeve and the auxiliary sleeve, the first rotating head is rotated to drive the connected worm to rotate. Since the adjusting block is slidably connected to the circular sleeve, and the worm wheel is fixedly connected to the circular sleeve, when the worm rotates, it drives the adjusting block to slide on the circular sleeve, so that the entire adjusting block slides in an arc. According to specific needs, the adjusting block is adjusted to a specified angle, that is, the angle at which the main sleeve and the auxiliary sleeve are inserted into the patient's body, which is convenient for subsequent doctors to perform surgical treatment on the patient. Any angle can be adjusted at will according to the surgical needs of different patients. The operation is simple, which greatly improves the surgical efficiency.

[0014] Furthermore, the two limit pins respectively pass through the corresponding arc-shaped grooves, and the two connecting blocks are both slidably connected to the circular sleeve.

[0015] Through the above technical solution, when the adjusting block slides, the limit pin slides in the arc groove, and at the same time the connecting block and the circular sleeve slide, which has a certain stability, thereby improving the stability of the main sleeve and the auxiliary sleeve.

[0016] Furthermore, both ends of the worm rotate by friction with the circular sleeve, and the worm is engaged with the worm wheel, and the worm rotates by friction with the circular sleeve.

[0017] Through the above technical solution, during the operation, the first rotating head will not rotate randomly, which prevents the entire adjustment block from sliding and improves the quality of the operation.

[0018] Furthermore, the fixing mechanism includes a fixing box fixedly connected to the front end of the adjusting block, a cavity is provided in the fixing box, a fixing block is slidably connected in the cavity, the front and rear ends of the fixing block are fixedly connected to connecting plates, one side of the two connecting plates is fixedly connected to a second spring, one side of the fixing block is movably connected to a threaded rod, the other end of the threaded rod is fixedly connected to a second rotating head, and a circular hole is opened in the center of the front end of the fixing box.

[0019] Through the above technical solution, after adjusting the distance between the main sleeve and the auxiliary sleeve, as well as the various insertion angles required, the main sleeve and the auxiliary sleeve need to be inserted into the corresponding adjustment blocks and fixed. First, the main sleeve is passed through the adjustment block, and its bottom end is inserted into the patient's body. After insertion into the designated position, the second rotating head is rotated to drive the threaded rod to rotate in the adjustment block, thereby driving the fixed block to move, so that the fixed block is tightly attached to the outer wall of the main sleeve, thereby achieving clamping of the main sleeve. Similarly, the auxiliary sleeve is inserted into the patient's body and clamped by the fixing mechanism. During the surgical operation, the doctor can hold the handle with one hand and adjust the insertion depth and angle of the main sleeve with the other hand, and can also adjust the insertion depth and angle of the auxiliary sleeve. During the operation, the main sleeve is inserted into the endoscope and the auxiliary sleeve is inserted into the surgical instrument. The doctor can pick up the entire device by the handle with one hand and quickly change the surgical instrument with the other hand to insert it into the auxiliary sleeve for surgical treatment, reducing the number of steps for medical staff to pass, thereby improving surgical efficiency, reducing surgical time, and improving the success rate of the operation.

[0020] Furthermore, one end of each of the two second springs is fixedly connected to the fixing box, and the threaded rod is threadedly connected to the fixing box.

[0021] Through the above technical solution, the fixed block has a certain buffering effect during the clamping process due to the action of the two second springs. The elastic force of the two second springs is much smaller than the clamping force of the fixed block, and only plays a buffering role, making it easier for the fixed block to slowly clamp the main sleeve and the auxiliary sleeve.

[0022] Furthermore, the two fixing blocks are respectively tightly attached to the outer walls of the main sleeve and the auxiliary sleeve.

[0023] Through the above technical solution, clamping can be performed according to the insertion depth of the main sleeve and the auxiliary sleeve, which has strong functionality and improves the surgical effect.

[0024] The beneficial effects of the present application are as follows: (1) the present application can slide randomly by designing the arc-shaped frame and the moving mechanism, and the specified distance and angle to be adjusted can be observed through the first scale on the arc-shaped frame, so as to facilitate the accurate insertion of the endoscope and surgical instruments into the patient's body, improve the operation efficiency, and can realize rapid limiting and clamping, so as to accurately adjust the distance between the main sleeve and the auxiliary sleeve, facilitate the operation of the doctor, and also facilitate the subsequent accurate insertion of the endoscope and surgical instruments into the patient's body, improve the operation effect; (2) the present application can adjust the angle of the main sleeve and the auxiliary sleeve inserted into the patient's body according to specific needs by designing the adjusting mechanism, which is convenient for the doctor to perform surgical treatment on the patient, and can also adjust any angle at will according to the needs of different patients' surgery, which is simple to operate and greatly improves the operation efficiency; (3) the present application can quickly fix the inserted main sleeve and auxiliary sleeve by designing the fixing mechanism, and can adjust the insertion depth of the main sleeve and the auxiliary sleeve, so that the doctor can hold the whole device by one hand through the handle, and the other hand can quickly replace the surgical instrument inserted into the auxiliary sleeve for surgical treatment, reducing the transmission steps of medical staff, thereby improving the operation efficiency, reducing the operation time, and improving the operation success rate. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the first perspective view of the present application as a whole; Figure 2 is the second perspective view of the present application as a whole; Figure 3 is the overall front view of the present application; Figure 4 is the arc-shaped frame sectional view of the present application; Figure 5 is the moving shell structure schematic view of the present application; Figure 6 is the moving mechanism part structure schematic view of the present application; Figure 7 is the adjusting mechanism expansion view of the present application; Figure 8 is the adjusting mechanism and fixing mechanism structure schematic view of the present application; Figure 9 is the fixing mechanism sectional view of the present application; Figure 10 is the fixing mechanism part structure schematic view of the present application; Figure 11 is the fixing mechanism appearance view of the present application; Figure 12 is Figure 4 is the local enlarged view of A in the figure.

[0026] 1. The worm gear is a gear selected from the group consisting of a first gear and a second gear. 2. The worm gear is a gear selected from the group consisting of a first gear and a second gear. 3. The worm gear is a gear selected from the group consisting of a first gear and a second gear. 4. The worm gear is a gear selected from the group consisting of a first gear and a second gear. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figures 1-12 As shown, a dual-channel endoscope working sleeve of this embodiment includes an arc-shaped frame 1, a handle 11 is fixedly connected to the top center of the arc-shaped frame 1, a first scale 12 is provided at the rear end of the arc-shaped frame 1, an arc-shaped rack 13 is installed inside the arc-shaped frame 1, and a limiting groove 14 is provided at the bottom of the arc-shaped frame 1. When performing endoscopic surgery, after the main sleeve 5 and the auxiliary sleeve 6 are installed, the doctor can pick up the entire device through the handle 11 with one hand, and perform surgical mechanical operations on the patient's body through the auxiliary sleeve 6 with the other hand, reducing the steps of medical staff to transfer surgical tools and improving surgical efficiency. The first scale 12 is used to adjust the angle of the main sleeve 5 and the auxiliary sleeve 6. When moving the moving mechanism 2, the specified distance and angle that need to be adjusted are observed through the first scale 12, thereby facilitating the precise insertion of the endoscope and surgical instruments into the patient's body and improving surgical efficiency. The main sleeve 5 and the auxiliary sleeve 6 are respectively provided in the two fixing mechanisms 4.

[0029] like Figures 1-12As shown, there are two moving mechanisms 2 slidably connected to the arc frame 1. The moving mechanism 2 includes a moving shell 201 slidably connected to the outer wall of the arc frame 1. The center of the rear end of the moving shell 201 is provided with a first pointer 202. The center of the inner part of the moving shell 201 is provided with a limiting column 203. The top of the limiting column 203 is fixedly connected to the mounting plate 204. The outer wall of the limiting column 203 is sleeved with a first spring 205. The bottom front end of the mounting plate 204 is fixedly connected to the limiting tooth 206. When the moving shell 201 needs to be moved to the specified position, the limiting column 203 is pushed so that the limiting column 203 pushes the connected mounting plate 204, thereby pushing the connected limiting tooth 206, so that the limiting tooth 206 is separated from the arc rack 13, and the moving shell 201 is slid to the specified position, that is, the distance between the main sleeve 5 and the auxiliary sleeve 6. The limiting column 203 is released and under the action of the first spring 205 The first spring 205 can help the limit column 203 to reset, thereby facilitating the next adjustment. The entire movable shell 201 can slide freely and can be quickly limited and clamped at the same time, with high precision, which greatly improves the efficiency of the operation.

[0030] like Figures 1-8As shown, the front ends of the two moving mechanisms 2 are both equipped with an adjustment mechanism 3, which includes a circular sleeve 301 fixedly connected to the front end of the moving shell 201, an arc groove 302 is provided on the front and rear ends of the outer wall of the circular sleeve 301, a second scale 303 is provided on the front end of the circular sleeve 301, a worm gear 304 is fixedly connected to the center of the outer wall of the circular sleeve 301, an adjustment block 305 is slidably connected to the outer wall of the circular sleeve 301, a second pointer 306 is fixedly connected to the bottom front end of the adjustment block 305, and the front and rear ends of the bottom of the adjustment block 305 are fixedly connected to the limited The bottom ends of the outer walls of the two adjusting blocks 305 are fixedly connected with connecting blocks 308. A worm 309 is installed inside the adjusting block 305. One end of the worm 309 is fixedly connected with a first rotating head 310. After the moving mechanism 2 is adjusted, when the insertion angle of the main sleeve 5 and the auxiliary sleeve 6 needs to be adjusted, the first rotating head 310 is rotated to drive the connected worm 309 to rotate. Since the adjusting block 305 is slidably connected to the circular sleeve 301 and the worm wheel 304 is fixedly connected to the circular sleeve 301, the worm 309 rotates. When the adjusting block 305 is driven to slide on the circular sleeve 301, the entire adjusting block 305 slides in an arc shape. The adjusting block 305 is adjusted to a specified angle according to specific needs, that is, the angle at which the main sleeve 5 and the auxiliary sleeve 6 are inserted into the patient's body, which is convenient for subsequent doctors to perform surgical treatment on the patient. Any angle can be adjusted at will. According to the surgical needs of different patients, the operation is simple and the surgical efficiency is greatly improved. The two limit pins 307 respectively pass through the corresponding arc grooves 302, and the two connecting blocks 308 are slidably connected to the circular sleeve 301. During the sliding process of the adjustment block 305, the limit pin 307 slides in the arc groove 302, and at the same time, the connecting block 308 slides with the circular sleeve 301, which has a certain stability, thereby improving the stability of the main sleeve 5 and the auxiliary sleeve 6. The two ends of the worm 309 rotate with the circular sleeve 301 by friction, and the worm 309 engages with the worm wheel 304. Since the worm 309 rotates with the circular sleeve 301 by friction, during the operation, the first rotating head 310 will not rotate at will, preventing the entire adjustment block 305 from sliding, thereby improving the quality of the operation.

[0031] like Figures 1-11As shown, the two adjustment mechanisms 3 are both equipped with a fixing mechanism 4, which includes a fixing box 401 fixedly connected to the front end of the adjustment block 305, a cavity 402 is provided in the fixing box 401, a fixing block 403 is slidably connected in the cavity 402, the front and rear ends of the fixing block 403 are both fixedly connected to connecting plates 404, one side of the two connecting plates 404 is fixedly connected to a second spring 405, one side of the fixing block 403 is movably connected to a threaded rod 406, the other end of the threaded rod 406 is fixedly connected to a second rotating head 407, and a circular hole 408 is opened in the center of the front end of the fixing box 401. After adjusting the distance between the main sleeve 5 and the auxiliary sleeve 6, as well as the angles required for insertion, the main sleeve 5 and the auxiliary sleeve 6 need to be inserted into the corresponding adjustment blocks 305 and fixed. First, the main sleeve 5 passes through the adjustment block 305, and its bottom end is inserted into the patient's body. After inserting into the designated position, the second rotating head 407 is rotated to drive the threaded rod 406 to rotate in the adjustment block 305, thereby driving the fixing block 403 to move, so that the fixing block 403 is tightly attached to the outer wall of the main sleeve 5, thereby achieving clamping of the main sleeve 5. Similarly, the auxiliary sleeve 6 is inserted into the patient's body and And it is clamped by the fixing mechanism 4. During the operation, the doctor can hold the handle 11 with one hand and adjust the insertion depth and angle of the main sleeve 5 and the insertion depth and angle of the auxiliary sleeve 6 with the other hand. During the operation, the main sleeve 5 is inserted into the endoscope and the auxiliary sleeve 6 is inserted into the surgical instrument. The doctor can pick up the entire device with one hand through the handle 11 and quickly replace the surgical instrument with the other hand to insert it into the auxiliary sleeve 6 for surgical treatment, reducing the number of steps for medical staff to pass, thereby improving the efficiency of the operation, reducing the operation time, and improving the success rate of the operation. The two second springs 4 One end of 05 is fixedly connected to the fixing box 401, and the threaded rod 406 is threadedly connected to the fixing box 401. During the clamping process, the fixing block 403 has a certain buffering effect through the action of the two second springs 405. The elastic force of the two second springs 405 is much smaller than the clamping force of the fixing block 403, and it only plays a buffering role, making it convenient for the fixing block 403 to slowly clamp the main sleeve 5 and the auxiliary sleeve 6. The two fixing blocks 403 are respectively tightly attached to the outer walls of the main sleeve 5 and the auxiliary sleeve 6, and can be clamped according to the insertion depth of the main sleeve 5 and the auxiliary sleeve 6. It has strong functionality, thereby improving the surgical effect.

[0032] The working principle of this embodiment is as follows: when performing endoscopic surgery, it is first necessary to adjust the position between the two moving mechanisms 2, push the limiting column 203, so that the limiting column 203 pushes the connected mounting plate 204, thereby pushing the connected limiting tooth 206, so that the limiting tooth 206 is separated from the arc-shaped rack 13, and observes the specified distance and angle that need to be adjusted according to the first scale 12. After sliding the moving shell 201 to the specified position, that is, the distance between the main sleeve 5 and the auxiliary sleeve 6, loosen the limiting column 203, and under the action of the first spring 205, the mounting plate 204 is reset, driving the limiting tooth 206 to engage with the arc-shaped rack 13, thereby achieving adjustment of the two moving shells 201, that is, the position distance adjustment between the main sleeve 5 and the auxiliary sleeve 6; When the insertion angle of the main sleeve 5 and the auxiliary sleeve 6 needs to be adjusted, the first rotating head 310 is rotated to drive the connected worm 309 to rotate. Since the adjustment block 305 is slidably connected to the circular sleeve 301, and the worm wheel 304 is fixedly connected to the circular sleeve 301, when the worm 309 rotates, it drives the adjustment block 305 to slide on the circular sleeve 301, so that the entire adjustment block 305 slides in an arc. According to specific needs, the adjustment block 305 is adjusted to a specified angle to complete the angle adjustment of the adjustment block 305, that is, the angle at which the main sleeve 5 and the auxiliary sleeve 6 are inserted into the patient's body; After adjustment, the main sleeve 5 and the auxiliary sleeve 6 need to be inserted. First, the main sleeve 5 is passed through the adjustment block 305, and its bottom end is inserted into the patient's body. After insertion into the designated position, the second rotating head 407 is rotated to drive the threaded rod 406 to rotate in the adjustment block 305, thereby driving the fixed block 403 to move, so that the fixed block 403 is tightly attached to the outer wall of the main sleeve 5, thereby achieving clamping of the main sleeve 5. Similarly, the auxiliary sleeve 6 is inserted into the patient's body and clamped by the fixing mechanism 4. After that, the doctor can pass the endoscope through the main sleeve 5. Inserted into the patient's body, the surgical instrument is inserted through the auxiliary sleeve 6 to achieve dual-channel endoscopic surgery on the patient. During the operation, the doctor can hold the handle 11 with one hand and adjust the insertion depth and angle of the main sleeve 5 with the other hand, and can also adjust the insertion depth and angle of the auxiliary sleeve 6. During the operation, the main sleeve 5 is inserted into the endoscope and the auxiliary sleeve 6 is inserted into the surgical instrument. The doctor can pick up the entire device through the handle 11 with one hand and quickly change the surgical instrument with the other hand to insert it into the auxiliary sleeve 6 for surgical treatment, thereby achieving rapid endoscopic surgical treatment.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A dual-channel endoscope working sleeve, comprising an arc-shaped frame (1), characterized in that: Two moving mechanisms (2) are slidably connected to the arc-shaped frame (1); The front ends of the two moving mechanisms (2) are both equipped with adjustment mechanisms (3), and the two adjustment mechanisms (3) are both equipped with fixing mechanisms (4); A main sleeve (5) and a secondary sleeve (6) are respectively provided in the two fixing mechanisms (4).

2. A dual-channel endoscope working cannula according to claim 1, characterized in that: A handle (11) is fixedly connected to the center of the top of the arc frame (1), a first scale (12) is provided at the rear end of the arc frame (1), an arc-shaped rack (13) is installed inside the arc frame (1), and a limiting groove (14) is provided at the bottom of the arc frame (1).

3. The dual-channel endoscope working cannula according to claim 2, characterized in that: The moving mechanism (2) comprises a moving shell (201) slidably connected to the outer wall of the arc frame (1); a first pointer (202) is provided at the rear end center of the moving shell (201); a limiting column (203) is provided at the inner center of the moving shell (201); a top end of the limiting column (203) is fixedly connected to a mounting plate (204); a first spring (205) is sleeved on the outer wall of the limiting column (203); and a limiting tooth (206) is fixedly connected to the bottom front end of the mounting plate (204).

4. The dual-channel endoscope working cannula according to claim 3, characterized in that: The limiting column (203) passes through the bottom of the movable shell (201) and is slidably connected to the limiting groove (14); the top of the first spring (205) is fixedly connected to the mounting plate (204), and the bottom end thereof is fixedly connected to the movable shell (201); and the limiting tooth (206) is engaged with the arc-shaped rack (13).

5. The dual-channel endoscope working cannula according to claim 3, characterized in that: The adjustment mechanism (3) comprises a circular sleeve (301) fixedly connected to the front end of the movable shell (201); the front and rear ends of the outer wall of the circular sleeve (301) are both provided with arc grooves (302); the front end of the circular sleeve (301) is provided with a second scale (303); the center of the outer wall of the circular sleeve (301) is fixedly connected to a worm gear (304); the outer wall of the circular sleeve (301) is slidably connected to an adjustment block (305); the front bottom of the adjustment block (305) is fixedly connected to a second pointer (306); the front and rear ends of the bottom of the adjustment block (305) are both fixedly connected to a limit pin (307); the bottom ends of the outer walls of the two adjustment blocks (305) are both fixedly connected to a connecting block (308); a worm (309) is installed inside the adjustment block (305); and one end of the worm (309) is fixedly connected to a first rotating head (310).

6. The dual-channel endoscope working cannula according to claim 5, characterized in that: The two limiting pins (307) respectively penetrate the corresponding arc-shaped slots (302), and the two connecting blocks (308) are both slidably connected to the circular sleeve (301).

7. The dual-channel endoscope working cannula according to claim 5, characterized in that: The two ends of the worm (309) rotate by friction with the circular sleeve (301), and the worm (309) is meshed with the worm wheel (304).

8. The dual-channel endoscope working cannula according to claim 5, characterized in that: The fixing mechanism (4) comprises a fixing box (401) fixedly connected to the front end of the adjusting block (305); a cavity (402) is provided in the fixing box (401); a fixing block (403) is slidably connected in the cavity (402); the front and rear ends of the fixing block (403) are fixedly connected to connecting plates (404); one side of each of the two connecting plates (404) is fixedly connected to a second spring (405); one side of the fixing block (403) is rotatably connected to a threaded rod (406); the other end of the threaded rod (406) is fixedly connected to a second rotating head (407); and a circular hole (408) is provided at the center of the front end of the fixing box (401).

9. The dual-channel endoscope working cannula according to claim 8, characterized in that: One end of each of the two second springs (405) is fixedly connected to the fixing box (401), and the threaded rod (406) is threadedly connected to the fixing box (401).

10. The dual-channel endoscope working cannula according to claim 8, characterized in that: The two fixing blocks (403) are respectively tightly attached to the outer walls of the main sleeve (5) and the auxiliary sleeve (6).

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