Endoscope

Abstract

According to the endoscope, a first channel arranged in a tube body is used as an independent observation channel, when an operation is carried out, only one minimally invasive channel needs to be established, the tube body extends into an operation area in the channel, and the situation of the operation area can be directly observed through an external observation barrel under the reflection effect of a mirror surface; the second channel is arranged on the outer side of the tube body to serve as an independent instrument channel, so that surgical instruments can reach a surgical area and are prevented from interfering with observation sight, surgical operation can be performed while observation is performed, and surgical efficiency and safety are improved; the second channel can be closed through a cover plate to enhance a sterile barrier and reduce the risk of tissue damage, the cover plate can be removed as needed to provide a larger instrument operation space and carry out an endoscopic fusion operation, the operation safety and efficiency are both considered, the overall structure is designed through modularization and self-centering, the assembly process is simplified, and the assembly efficiency is improved. And the use convenience and clinical applicability of the equipment are improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology and relates to a surgical instrument for intervertebral foramen, specifically an endoscope. Background Technology

[0002] Currently, endoscopic techniques, such as percutaneous endoscopic discectomy and interlaminar endoscopic discectomy, are widely used in minimally invasive spinal surgery to treat conditions like lumbar disc herniation, spinal stenosis, and endoscopic fusion. Traditional endoscope designs typically integrate the optical imaging system and surgical instrument channel into the same cannula. This results in the optical imaging system and instrument channel occupying the same storage space. When various endoscopic surgical instruments are used to perform surgical operations through the instrument channel, interference can easily occur with the optical imaging system within the same storage space. Furthermore, when larger-diameter surgical instruments are required, a larger-diameter endoscopic cannula is needed, meaning a larger-diameter endoscopic cannula must be used to enter the patient's body. This increases patient trauma and restricts the operating space for surgical instruments, increasing the difficulty of the surgery and limiting the expansion of surgical indications. Summary of the Invention

[0003] To address the technical problems existing in the background art, this invention proposes an endoscope with an independent instrument channel and a modular connection structure, which improves surgical adaptability and operation.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] An endoscope includes: a tube body, a mounting base, and an observation tube. The tube body is inserted into and connected to the mounting base from one end. The tube body has a first channel that runs through the middle. A rear end cap is inserted into the other end of the mounting base. The rear end cap blocks the first channel from the rear end of the tube body. A slot communicating with the first channel is opened on the tube wall. The observation tube passes through the side wall of the mounting base and is connected to the mounting base. The observation tube communicates with the first channel through the slot. The slot extends along the axial direction of the tube body to the rear end of the tube body. A prism mounting surface is inclinedly provided on the rear end cap so that the prism can reflect all the light that enters the first channel from the front end of the tube body into the observation tube.

[0006] Furthermore, the radial section of the pipe includes a first annular segment and a second annular segment, which are connected end to end to form a closed loop. The first annular segment extends smoothly along the axial direction to form the first pipe wall of the pipe, and the second annular segment extends smoothly along the axial direction to form the second pipe wall of the pipe. The first channel is closed between the first pipe wall and the second pipe wall, and the outside of the first pipe wall has an open second channel.

[0007] Furthermore, a cover plate is detachably connected to the pipe body. The radial section of the cover plate is a third annular segment. The cover plate is formed by the smooth axial extension of the third annular segment. The third annular segment can be closedly connected with the first annular segment so that when the cover plate is connected to the pipe body, the second channel that is open on the outside of the first pipe wall is closed, so that the second channel can switch between closed and open states.

[0008] Furthermore, the mounting base has an axially formed first arc-shaped groove that matches the second wall of the tube body. The rear end of the tube body is adapted to be inserted into the first arc-shaped groove and connected to the mounting base. A sliding cover is adapted to be installed on the first arc-shaped groove. One end of the sliding cover has an axially formed second arc-shaped groove that matches the cover plate. The cover plate is inserted into the second arc-shaped groove and connected to the first wall of the tube body to close. The other end of the sliding cover has a through groove that communicates with the second channel.

[0009] Furthermore, the mounting base has a sliding groove that matches the sliding cover. The sliding cover is inserted into the sliding groove and connected to the mounting base. Limiting plates are provided on both sides of the groove wall. Limiting grooves that match the limiting plates are provided on both sides of the sliding cover. By moving the sliding cover along the sliding groove, the limiting plates are locked into the limiting grooves.

[0010] Furthermore, a lighting module is provided in the first channel of the tube to illuminate the surgical area outside the first channel from the front end of the tube. A first through hole is provided on the side wall of the mounting base. The first through hole is connected to the first channel through a slot. The lighting module passes through the first through hole and is connected to the light source.

[0011] Furthermore, a cleaning module is provided in the first channel of the tube to rinse the surgical area outside the first channel from the front end of the tube. One or more second through holes are provided on the side wall of the mounting base. The second through holes are connected to the first channel through slots. The cleaning modules are connected to the water source through one or more second through holes.

[0012] Furthermore, the rear end cover includes: a cover body and an insert block. One end of the insert block is adapted to be inserted into the first arc-shaped groove of the mounting base and docks with the rear end of the tube body. The cover body is fixedly connected to the other end of the insert block to block the first channel. The groove is opened on the second tube wall of the tube body to form an insertion part at the rear end of the tube body. A first slot adapted to the insertion part is opened on the insert block. The tube body is inserted into the first slot through the insertion part and connected to the insert block.

[0013] Furthermore, the end of the insert that connects with the tube body has a beveled end face, the prism mounting surface is arranged along the beveled end face, and a mounting groove is provided in the middle of the beveled end face, and the prism is rotatably connected in the mounting groove.

[0014] Furthermore, the first arc-shaped groove of the mounting base is provided with two partitions, and the partitions are provided with a second slot that matches the plug-in part. The tube body is inserted into the second slot through the plug-in part and connected to the partition. A light-transmitting hole is provided in the middle of the partition. A transparent water-proof membrane is provided between the two partitions. The two partitions are connected by bolts to clamp and fix the water-proof membrane.

[0015] The beneficial effects of this invention are as follows: The endoscope provided in this application utilizes a first channel within the tube as an independent observation channel. During surgery, only one minimally invasive channel needs to be established. The tube is inserted into the surgical area within the channel, and through the reflection of the prism, the surgical area can be directly observed through the external observation tube. By setting a second channel on the outside of the tube as an independent instrument channel, surgical instruments can reach the surgical area without interfering with the observation line of sight. This allows for simultaneous observation and surgical operation, improving the efficiency and safety of the surgery. The second channel can be sealed with a cover plate to enhance... The sterile barrier reduces the risk of tissue damage, and the cover can be removed when needed to provide more space for instrument operation, balancing surgical safety and efficiency. The lighting and cleaning module, through the integrated design of arc-shaped slots and multiple through holes, achieves a compact layout of optical paths and pipelines, reducing assembly precision requirements and improving reliability and maintenance convenience. The adjustable mirror angle and water-proof membrane design ensure a clear surgical field of view and prevent liquid from entering the observation system, further ensuring the stability and visibility of the surgical process. The overall structure, through modular and self-centering design, simplifies the assembly process and improves the ease of use and clinical applicability of the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the optical path of the present invention.

[0018] Figure 3 This is a schematic diagram of the fitting state of the tube body and the cover plate of the present invention.

[0019] Figure 4 This is a radial cross-sectional schematic diagram of the tube body and cover plate in the mating state of the present invention.

[0020] Figure 5 This is a schematic diagram of the radial cross-section of the tube body of the present invention.

[0021] Figure 6 This is a schematic diagram of the radial cross-section of the cover plate of the present invention.

[0022] Figure 7 This is a schematic diagram showing the mating state of the mounting base and the sliding cover of the present invention.

[0023] Figure 8 This is a three-dimensional schematic diagram of the mounting base of the present invention.

[0024] Figure 9 This is a three-dimensional schematic diagram of the sliding cover of the present invention.

[0025] Figure 10 This is a three-dimensional schematic diagram of the rear end cover of the present invention.

[0026] Figure 11 This is a three-dimensional schematic diagram of the tube body of the present invention.

[0027] Figure 12 This is a schematic diagram of the tube body and the partition plate in the cooperation state of the present invention.

[0028] Figure 13 This is a three-dimensional schematic diagram of the partition of the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figure 1-2 As shown, this invention provides an endoscope, comprising: a tube body 1, a mounting base 3, and an observation tube 8. The tube body 1 is detachably connected to the mounting base 3 by inserting it into the mounting base 3 from one end, facilitating intraoperative adjustment or postoperative cleaning and sterilization. Furthermore, various tube bodies 1 with different lengths, internal spatial structures, or functions can be provided, and can be detachably mounted on the mounting base 3 as needed, greatly improving the targeted and flexible use of the endoscope. The tube body 1 has an axially penetrating first channel 15 in its middle. A rear end cap 7 is inserted into the other end of the mounting base 3, and the rear end cap 7 seals the first channel 15 from the rear end of the tube body 1 to prevent external dust from entering and contaminating the first channel 15. The tube body 1 has an arc-shaped slot 17 that communicates with the first channel 15 on its tube wall. The observation tube 8 passes through the side wall of the mounting base 3 and is connected to the mounting base 3. The observation tube 8 communicates with the first channel 15 through the arc-shaped slot 17. The arc-shaped slot 17 extends along the axis of the tube body 1 to the rear end of the tube body 1. A prism mounting surface is inclined on the rear end cover 7 so that the prism 9 can reflect all the light that enters the first channel 15 from the front end of the tube body 1 into the observation tube 8. When the tube body 1 is inserted into the position of the patient's spine where surgery is required, the doctor can directly observe the situation of the surgical position through the observation tube 8. The angle between the observation tube 8 and the tube body 1 is greater than 100°, which makes it convenient for the doctor to observe and perform surgical operations at the same time.

[0031] like Figure 3-4As shown, the radial section of the tube body 1 includes a first annular segment 11 and a second annular segment 12. The first annular segment 11 and the second annular segment 12 are connected end to end to form a closed loop. The first annular segment 11 extends smoothly along the axial direction to form the first tube wall 13 of the tube body 1. The second annular segment 12 extends smoothly along the axial direction to form the second tube wall 14 of the tube body 1. The first channel 15 is closedly disposed between the first tube wall 13 and the second tube wall 14. The outside of the first tube wall 13 has an open second channel 16. The second channel 16 is used to pass surgical instruments. By setting the second channel 16 to be open, the surgical instruments can be used without being restricted or limited. Moreover, the second channel 16 is not limited to annular; other structures that can achieve the same function are also acceptable.

[0032] A cover plate 2 is detachably connected to the tube body 1. The radial section of the cover plate 2 is a third annular segment 21, which is smoothly extended axially from the third annular segment 21. The third annular segment 21 can be closedly connected to the first annular segment 11, so that when the cover plate 2 is connected to the tube body 1, it closes the second channel 16 that is open on the outside of the first tube wall 13, allowing the second channel 16 to switch between closed and open states. This allows the cover plate 2 to be installed on the tube body 1 when the size of the surgical instruments is not critical, reducing the risk of the surgical instruments in the second channel 16 scratching surrounding tissues during use, while also enhancing the sterile barrier. Only when larger instruments, such as interbody fusion cages or nucleus pulposus forceps, are needed, can the cover plate 2 be removed, restoring the second channel 16 to its open state, providing more operating space and improving surgical efficiency. Specifically, as... Figure 5-6 As shown, the second annular segment 12 and the third annular segment 21 are closed to form the first ring 20. The first annular segment 11 is part of the second ring 10. The second ring 10 intersects the first ring 20 at the two connection points of the first annular segment 11 and the second annular segment 12. The first annular segment 11 is located inside the first ring 20. Thus, when the cover plate 2 is closed with the tube body 1, a complete annular cross section can be formed, which significantly improves the bending resistance of the second channel 16, avoids deformation of the second channel 16 during the operation of large instruments, and ensures the smooth passage of instruments.

[0033] like Figure 7-9 As shown, the mounting base 3 has an axially formed first arc-shaped groove 31 that matches the second tube wall 14 of the tube body 1. The rear end of the tube body 1 is inserted into the first arc-shaped groove 31 and connected to the mounting base 3. A sliding cover 4 is detachably mounted on the first arc-shaped groove 31. One end of the sliding cover 4 has an axially formed second arc-shaped groove 41 that matches the cover plate 2. The cover plate 2 is inserted into the second arc-shaped groove 41 and connected to the sliding cover 4, so that when the sliding cover 4 is fitted onto the mounting base 3, the cover plate 2 and the first tube wall 13 of the tube body 1 are connected and closed. The other end of the sliding cover 4 has a through groove 42 that communicates with the second channel 16. The inner radial direction of the through groove 42 gradually increases away from the second channel 16. In use, surgical instruments can enter the second channel 16 through the through groove 42.

[0034] Specifically, the mounting base 3 has a sliding groove 32 that matches the sliding cover 4. The sliding cover 4 is inserted into the sliding groove 32 and connected to the mounting base 3. Limiting plates 33 are provided on both sides of the groove 32. Limiting grooves 43 that match the limiting plates 33 are provided on both sides of the sliding cover 4. By moving the sliding cover 4 along the sliding groove 32, the limiting plates 33 are locked into the limiting grooves 43. Through the locking mechanism of the limiting plates 33 and the limiting grooves 43, a stable connection between the mounting base 3 and the sliding cover 4 is achieved. At the same time, it supports quick disassembly and assembly, and facilitates the replacement of different specifications of pipe body 1 and cover plate 2.

[0035] An illumination module is installed in the first channel 15 of the tube body 1 to illuminate the surgical area outside the first channel 11 from the front end of the tube body 1. A first through hole 34 is provided on the side wall of the mounting base 3. The first through hole 34 communicates with the first channel 15 through an arc-shaped groove 17. The illumination module passes through the first through hole 34 and connects to the light source. The arc-shaped groove 17 forms a wide docking space in the axial extension range, allowing a certain positional tolerance between the first through hole 34 and the arc-shaped groove 17. Even if there is a slight offset when the mounting base 3 docks with the tube body 1, the first through hole 34 can still dock smoothly with the arc-shaped groove 17, which greatly reduces the installation accuracy requirements of the tube body 1 and facilitates installation and disassembly. Specifically, the lighting module includes: fiber optic cable and cable connector 5. The fiber optic cable is installed close to the inner wall of the tube body 1 in the first channel 15. One end of the fiber optic cable is located at the front end of the tube body 1, and the other end passes through the arc-shaped slot 17 to connect to the cable connector 5 installed in the first through hole 34. When the external cold light source beam is installed at the cable connector 5, the external cold light source can be guided to the fiber optic cable. The fiber optic cable can illuminate the surgical area outside the first channel 11, thereby facilitating the observation of the surgical area during surgery.

[0036] A cleaning module is installed in the first channel 15 of the tube body 1 to rinse the surgical area outside the first channel 11 from the front end of the tube body 1. Two second through holes 38 are opened on the side wall of the mounting base 3. Both second through holes 38 are connected to the first channel 15 through an arc-shaped groove 17. The cleaning module is connected to a water source through each of the two second through holes 38. Through the above arrangement, a "many-to-one" connection relationship is formed between the first through hole 34 and the two second through holes 38 of the mounting base 3 and the arc-shaped groove 17 of the tube body 1. Different functional pipelines can independently pass through the corresponding first through hole 34 or second through hole 38, and then merge into the first channel 15 through the arc-shaped groove 17, simplifying the pipeline integration design. Specifically, the cleaning module includes two water pipes and two water pipe connectors 6. The two water pipes are installed close to the inner wall of the pipe body 1 in the first channel 15. One end of the two water pipes is located at the front end of the pipe body 1, and the other end passes through the arc-shaped groove 17 and is connected to the two water pipe connectors 6 installed in the two second through holes 38 respectively. When blood or other fluids generated during the operation obstruct the view, the water pipe connectors 6 are connected to an external water source. Water is led through the water pipes to the front end of the pipe body 1 and sprayed out towards the surgical area outside the first channel 11 to rinse the surgical area and ensure the visibility of the surgical area.

[0037] like Figure 10 As shown, the rear cover 7 includes: a cover body 71 and an insert block 72. One end of the insert block 72 is adapted to be inserted into the first arc-shaped groove 31 of the mounting base 3 and docks with the rear end of the tube body 1, supporting quick disassembly and assembly, facilitating cleaning and sterilization of the inside of the tube body 1. The cover body 71 is fixedly connected to the other end of the insert block 72, forming a blockage of the first channel 15. Specifically, the cover body 71 is provided with multiple insert rods 76, and the end wall of one end of the mounting base 3 is provided with multiple insertion holes 39 corresponding to the multiple insert rods 76. When the insert block 72 is adapted to be inserted into the first arc-shaped groove 31, the multiple insert rods 74 are respectively inserted into the multiple insertion holes 39 for interference fit, so as to lock the end cover 7 and the mounting base 3, making installation convenient and efficient. Figure 11 As shown, an arc-shaped groove 17 is formed on the second pipe wall 14 of the pipe body 1 to form an M-shaped insertion part 18 at the rear end of the pipe body 1. An M-shaped first slot 73 adapted to the insertion part 18 is formed on the insertion block 72. The pipe body 1 is connected to the insertion block 72 by inserting the insertion part 18 into the first slot 73. Thus, the self-centering design is achieved through the M-shaped snap-fit ​​structure. During assembly, the insertion part 18 only needs to be pushed into the first slot 73 along the axial direction to automatically complete the precise positioning without complicated adjustments, which significantly improves the assembly efficiency.

[0038] The end of the insert 72 that connects to the tube body 1 has a beveled end face 74. The prism mounting surface is arranged along the beveled end face 74. By installing the prism 9, a light path connection is formed between the first channel 15 and the observation tube 8 through light reflection. The surgical area outside the first channel 15 can be observed through the observation tube 8 via the prism. A mounting groove 75 is provided in the middle of the beveled end face 74. The prism 9 is rotatably connected in the mounting groove 75, thereby changing the mounting angle of the prism 9 and adjusting the light reflection angle within the first channel 15, so that all the light within the first channel 15 is reflected to the observation tube 8.

[0039] like Figure 12-13 As shown, the first arc-shaped groove 31 of the mounting base 3 is provided with two partitions 35. Each partition 35 has an M-shaped second slot 36 that matches the insertion part 18. The tube 1 is inserted into the second slot 36 through the insertion part 18 and connected to the partition 35. The partition 35 isolates the tube 1 from the observation tube 2, preventing blood and fluid generated during surgery from flowing into the observation tube 8 along the first channel 15, thus reducing the risk of equipment malfunction. A light-transmitting hole 37 is provided in the middle of each partition 35. A transparent water-resistant membrane is placed between the two partitions 35. The two partitions 35 are connected by bolts to clamp and fix the water-resistant membrane, thereby ensuring unobstructed light path while isolating blood and fluid.

[0040] When using this endoscope, firstly, a hole is drilled at the location on the spine where surgery is needed to create a surgical channel. The tube 1 is then inserted into the patient's body along this channel. Surgical instruments are then inserted into the surgical area via a separate second channel 16 outside the tube 1, avoiding interference with the lighting and cleaning components within the first channel 15. The open second channel 16 is closed by a cover plate 2, enhancing the sterile barrier and reducing the risk of surgical instruments scratching surrounding tissues during use. When larger instruments are needed, the cover plate 2 is removed, restoring the second channel 16 to its open state and providing greater operating space. The instruments are not restricted or limited, improving surgical efficiency. Then, the cable connector 5 of the lighting component is connected to an external cold light source, illuminating the surgical area through fiber optic cables. The surgical area can be observed through the observation tube 8. Then, the surgical instruments are used to perform the operation, which can eliminate blind spots when operating in the surgical area and allow the instruments to work under the direct line of sight of the endoscope. The second channel 16 allows the surgical instruments and the line of sight to move coaxially along the central axis of the tube 1. When blood or fluid obstructs the view during the operation, the water pipe connector 6 is connected to a water source, and water is sprayed through the water pipe to rinse the surgical area, ensuring the visibility of the surgical area.

[0041] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. An endoscope, characterized in that, include: The tube (1), mounting base (3), and observation tube (8) are connected. The tube (1) is inserted into the mounting base (3) from one end and connected to the mounting base (3). The tube (1) has an axially penetrating first channel (15) in the middle. The other end of the mounting base (3) is connected to a rear end cap (7). The rear end cap (7) blocks the first channel (15) from the rear end of the tube (1). The tube wall of the tube (1) is provided with a slot (17) that communicates with the first channel (15). The observation tube (8) penetrates the side wall of the mounting base (3) and is connected to the mounting base (3). The observation tube (8) communicates with the first channel (15) through the slot (17). The slot (17) extends along the axial direction of the tube (1) to the rear end of the tube (1). A prism mounting surface is inclined on the rear end cap (7) so that the prism (9) can reflect all the light that enters the first channel (15) from the front end of the tube (1) into the observation tube (8).

2. The endoscope according to claim 1, characterized in that, The radial section of the tube (1) includes a first annular segment (11) and a second annular segment (12). The first annular segment (11) and the second annular segment (12) are connected end to end to form a closed loop. The first annular segment (11) extends smoothly along the axial direction to form the first tube wall (13) of the tube (1). The second annular segment (12) extends smoothly along the axial direction to form the second tube wall (14) of the tube (1). The first channel (15) is closed between the first tube wall (13) and the second tube wall (14). The outside of the first tube wall (13) has an open second channel (16).

3. The endoscope according to claim 2, characterized in that, A cover plate (2) is detachably connected to the pipe body (1). The radial section of the cover plate (2) is a third annular segment (21). The cover plate (2) is formed by the smooth axial extension of the third annular segment (21). The third annular segment (21) can be closedly connected with the first annular segment (11) so that when the cover plate (2) is connected to the pipe body (1), the second channel (16) open on the outside of the first pipe wall (13) is closed.

4. The endoscope according to claim 3, characterized in that, The mounting base (3) has an axially formed first arc groove (31) that is adapted to the second pipe wall (14) of the pipe body (1). The rear end of the pipe body (1) is adapted to be inserted into the first arc groove (31) and connected to the mounting base (3). A sliding cover (4) is adapted to be installed on the first arc groove (31). One end of the sliding cover (4) has an axially formed second arc groove (41) that is adapted to the cover plate (2). The cover plate (2) is inserted into the second arc groove (41) and connected to the first pipe wall (13) of the pipe body (1) to close. The other end of the sliding cover (4) has a through groove (42) that communicates with the second channel (16).

5. The endoscope according to claim 4, characterized in that, The mounting base (3) has a sliding groove (32) that matches the sliding cover (4). The sliding cover (4) is inserted into the sliding groove (32) and connected to the mounting base (3). Limiting plates (33) are provided on both sides of the sliding groove (32). Limiting grooves (43) that match the limiting plates (33) are provided on both sides of the sliding cover (4). By moving the sliding cover (4) along the sliding groove (32), the limiting plates (33) are locked into the limiting grooves (43).

6. The endoscope according to claim 4, characterized in that, The tube body (1) is provided with a lighting module in the first channel (15) to illuminate the surgical area outside the first channel (11) from the front end of the tube body (1). The mounting base (3) has a first through hole (34) on its side wall. The first through hole (34) is connected to the first channel (15) through the slot (17). The lighting module passes through the first through hole (34) to connect to the light source.

7. The endoscope according to claim 6, characterized in that, A cleaning module is provided in the first channel (15) of the tube body (1) to rinse the surgical area outside the first channel (11) from the front end of the tube body (1). One or more second through holes (38) are provided on the side wall of the mounting base (3). The second through holes (38) are connected to the first channel (15) through the slot (17). The cleaning module is connected to the water source through one or more second through holes (38).

8. The endoscope according to claim 7, characterized in that, The rear cover (7) includes: a cover body (71) and a plug (72). One end of the plug (72) is adapted to be inserted into the first arc-shaped groove (31) of the mounting base (3) and docks with the rear end of the tube body (1). The cover body (71) is fixedly connected to the other end of the plug (72) to block the first channel (15). The slot (17) is opened on the second tube wall (14) of the tube body (1) to form a plug-in part (18) at the rear end of the tube body (1). A first slot (73) adapted to the plug-in part (18) is opened on the plug (72). The tube body (1) is inserted into the first slot (73) through the plug-in part (18) and connected to the plug (72).

9. The endoscope according to claim 8, characterized in that, The end of the insert (72) that connects with the tube body (1) has a beveled end face (74). The prism mounting surface is arranged along the beveled end face (74). The middle part of the beveled end face (74) is provided with a mounting groove (75). The prism (9) is rotatably connected in the mounting groove (75).

10. The endoscope according to claim 9, characterized in that, The mounting base (3) has two partitions (35) in the first arc groove (31). The partitions (35) have a second slot (36) that matches the plug-in part (18). The tube (1) is inserted into the second slot (36) through the plug-in part (18) and connected to the partition (35). The partition (35) has a light-transmitting hole (37) in the middle. A transparent water-proof membrane is provided between the two partitions (35). The two partitions (35) are connected by bolts to clamp and fix the water-proof membrane.

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