Endoscope capable of preventing interference of impurities and used for gastroenterology department

Abstract

The invention relates to the technical field of medical instruments, in particular to an endoscope capable of preventing impurity interference and used for the gastroenterology department. Comprising an endoscope body, and an arc-shaped hole and a gap are formed in a lens of the endoscope body; the protective shell is connected to the outer side of the endoscope body; the fixed rods are symmetrically connected to the side surface of the lens; the rotating sleeve is rotationally connected to the fixed rod; and the arc-shaped doctor blade is connected between the two rotating sleeves, and the arc-shaped doctor blade is in contact with a lens in the lens. The swinging rod and the L-shaped sleeve can be driven to drive the arc-shaped scraping piece to move and scrape the surface of the lens by shifting the shifting piece, in the process, the arc-shaped scraping piece is always tightly attached to the lens surface under the support of the fixed rod and the rotating sleeve, pollutants with high adhesion can be effectively scraped, the problem that cleaning is not thorough due to insufficient pressure of traditional liquid flushing is solved, and the cleaning efficiency is improved. Meanwhile, light refraction or image distortion caused by the residual liquid film is completely eradicated, and the image definition and stability in the operation process are remarkably improved.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, and more particularly to a gastroenterological endoscope that prevents interference from impurities. Background Technology

[0002] In the clinical diagnosis and treatment of gastrointestinal diseases, endoscopes are used as a key visualization tool. However, in actual operation, the endoscope lens is easily contaminated by biological impurities such as blood, mucus, and food residue, which seriously affects the clarity of the image and thus interferes with the doctor's accurate judgment of the lesion.

[0003] For example, patent publication number CN114010137B discloses an anti-fogging and anti-contamination endoscope. It uses micro-spray nozzles around the lens to spray cleaning fluid onto the lens surface to flush away contaminants. While this design alleviates lens contamination to some extent, it still has significant drawbacks in practical applications. Because the endoscope operates inside the body's cavities, the spray pressure of the cleaning fluid must be kept low to avoid damage to delicate mucous membranes or patient discomfort caused by high-pressure liquid. This directly limits its ability to remove highly adhesive blood or viscous secretions. Furthermore, water stains or liquid films remaining on the lens surface after cleaning can interfere with light propagation, causing image distortion or reflection, further reducing image quality. This forces medical staff to frequently interrupt surgery to remove the endoscope for manual cleaning. This repeated insertion and removal not only significantly reduces surgical efficiency and increases patient pain and infection risk, but may also affect the overall quality and continuity of diagnosis and treatment due to operational interruptions. Summary of the Invention

[0004] In view of this, the present invention provides a gastroenterological endoscope that prevents interference from impurities, which overcomes the shortcomings of existing anti-pollution endoscopes that have poor cleaning effect when the lens is rinsed by spraying cleaning fluid, and are prone to leaving water stains or liquid films on the lens surface, thus affecting the image quality.

[0005] Technical solution: A gastroenterological endoscope for preventing interference from impurities, comprising: an endoscope body with an arc-shaped hole and gap at the lens; a protective shell connected to the outside of the endoscope body; a fixing rod symmetrically connected to the side of the lens; a rotating sleeve rotatably connected to the fixing rod; an arc-shaped scraper connected between the two rotating sleeves and in contact with the lens inside the lens; a moving component disposed inside the endoscope body for driving the arc-shaped scraper to move; and an isolation component disposed inside the endoscope body for isolating and protecting the lens inside the lens.

[0006] Furthermore, it is particularly preferred that the moving component includes: a swing rod rotatably connected to the inside of the lens; an L-shaped sleeve slidably connected to the swing rod, with the end of the L-shaped sleeve passing through an arc-shaped hole; a short rod connected to the L-shaped sleeve, with an arc-shaped groove inside the lens, the short rod sliding within the arc-shaped groove; a connecting rod rotatably connected to the end of the L-shaped sleeve, and the connecting rod connected to the arc-shaped scraper; and a swing mechanism disposed inside the endoscope body for driving the swing rod to swing.

[0007] Furthermore, it is particularly preferred that the swing mechanism includes: a U-shaped rod symmetrically connected to the swing rod; a first sleeve symmetrically connected to the inside of the endoscope body; a first pull rope slidably connected to the inside of the first sleeve, and one end of the first pull rope is connected to the U-shaped rod; a rotating frame rotatably connected to the inside of the endoscope body, and the other end of the first pull rope is connected to the rotating frame; and a lever connected to the rotating shaft of the rotating frame.

[0008] Furthermore, it is particularly preferred that the isolation assembly includes: a sliding frame slidably connected to the inside of the lens; a silicone baffle circumferentially spaced from the side of the sliding frame, with the silicone baffle passing through the gap and contacting each other to block the lens side; an opening and closing mechanism disposed inside the endoscope body for driving the silicone baffle to move and open and close; and a locking mechanism disposed inside the endoscope body for locking the position of the silicone baffle.

[0009] Furthermore, it is particularly preferred that the opening and closing mechanism includes: a return spring, with its two ends connected to the sliding frame and the lens respectively; a second sleeve, spaced apart and connected to the interior of the endoscope body; a second pull rope, slidably connected to the interior of the second sleeve, with one end of the second pull rope connected to the sliding frame; a rotating rod, rotatably connected to the endoscope body, with circumferentially spaced circular grooves on the rotating rod; a knob, connected to the end of the rotating rod; and a winding wheel, spaced apart and connected to the rotating rod, with the other end of the second pull rope wound around the winding wheel.

[0010] Furthermore, it is particularly preferred that the locking mechanism includes: a sliding bead, which is slidably connected to the top of the endoscope body at intervals and is engaged in a circular groove; and a connecting spring, which is connected at both ends to the sliding bead and the endoscope body respectively.

[0011] Furthermore, particularly preferably, it also includes: a hollow frame connected to the side of the endoscope body; a fan connected to the hollow frame and kept in communication; a heating element installed inside the hollow frame; an air outlet pipe connected to the inside of the endoscope body, with one end of the air outlet pipe connected to the hollow frame and kept in communication; an exhaust pipe connected to the inside of the endoscope body, with one end of the exhaust pipe connected to the hollow frame; a mounting rod symmetrically connected to the inside of the lens; and a return pipe connected to the mounting rod, with the other ends of the air outlet pipe and the exhaust pipe respectively connected to both ends of the return pipe and kept in communication.

[0012] In addition, it is particularly preferred that the lens also includes: a rotating ring, which is rotatably connected to the inside of the lens and blocks the side of the arc-shaped hole; and a rubber sheet, which is connected to the rotating ring and has an L-shaped sleeve passing through it.

[0013] The present invention has the following advantages: 1. By moving the paddle, the present invention can drive the swing rod and the L-shaped sleeve to move and scrape the arc-shaped scraper on the surface of the lens. During this process, the arc-shaped scraper is always in close contact with the lens surface under the support of the fixed rod and the rotating sleeve, which can effectively scrape off the highly adhesive contaminants, avoid the problem of incomplete cleaning caused by insufficient pressure in traditional liquid rinsing, and eliminate light refraction or image distortion caused by residual liquid film, significantly improving the image clarity and stability during the operation.

[0014] 2. During the insertion of the endoscope, multiple transparent silicone baffles close under the action of a return spring to form a conical protective cover, effectively isolating impurities from direct contact with the lens. After reaching the lesion site, the rotating knob drives the rotating rod and the winding wheel to wind the second pull rope, which can precisely control the sliding frame to retract the silicone baffles into the lens. At this time, the sliding ball of the locking mechanism is engaged in the circular groove under the action of the connecting spring, firmly locking the open state of the silicone baffles and ensuring that the surgical field is unobstructed. This design can not only ensure the anti-contamination capability during the insertion of the endoscope, but also avoid the interference of the protective structure on the imaging, and achieve seamless switching between protection and imaging functions.

[0015] 3. This invention heats the air inside the hollow frame using a heating tube, and then pumps the hot air through the exhaust pipe into the return pipe surrounding the lens, forming a continuous circulating hot airflow. This makes the temperature inside the lens more consistent with the environment of the human body cavity, fundamentally eliminating the fogging phenomenon on the lens surface caused by temperature difference. In addition, the combination design of the rotating ring and the rubber sheet ensures the flexible movement of the L-shaped sleeve while dynamically sealing the arc-shaped hole to prevent body fluid from flowing back into the lens, further improving the sealing safety and operational reliability of the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram from a first perspective of the present invention.

[0017] Figure 2 This is a schematic diagram of the specific structure of the lens of the endoscope body of the present invention.

[0018] Figure 3 This is a schematic diagram of the separation structure of the fixed rod and the rotating sleeve of the present invention.

[0019] Figure 4 This is a schematic diagram of the installation of the mobile component of the present invention.

[0020] Figure 5 This is a schematic diagram of the specific structure of the swing mechanism of the present invention.

[0021] Figure 6 This is a schematic diagram of the installation of the isolation component of the present invention.

[0022] Figure 7 This is a schematic diagram of the installation of the opening and closing mechanism of the present invention.

[0023] Figure 8 This is a schematic diagram of the installation of the locking mechanism of the present invention.

[0024] Figure 9 This is a three-dimensional structural schematic diagram of the invention from a second perspective.

[0025] Figure 10 This is a schematic diagram showing the installation of the fan, heating element, air outlet pipe, exhaust pipe, and return pipe of the present invention.

[0026] Figure 11 This is a schematic diagram of the installation of the rotating ring and rubber sheet of the present invention.

[0027] The meanings of the reference numerals in the diagram are as follows: 1-Endoscope body, 101-Lens, 102-Arc-shaped hole, 103-Gap, 2-Protective shell, 3-Fixing rod, 4-Rotating sleeve, 5-Arc-shaped scraper, 6-Swing rod, 7-L-shaped sleeve, 8-Short rod, 9-Arc-shaped groove, 10-Connecting rod, 11-U-shaped rod, 12-First sleeve, 13-First pull rope, 14-Rotating frame, 15-Paddle, 16-Sliding frame, 17-Silicone baffle, 18-Reset spring, 19-Second sleeve, 20-Second pull rope, 21-Rotating rod, 2101-Circular groove, 22-Knob, 23-Winding wheel, 24-Sliding bead, 25-Connecting spring, 26-Hollow frame, 27-Fan, 28-Heating tube, 29-Outlet pipe, 30-Exhaust pipe, 31-Mounting rod, 32-Return pipe, 33-Rotating ring, 34-Rubber sheet. Detailed Implementation

[0028] 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.

[0029] Example: A gastroenterological endoscope designed to prevent interference from impurities, such as... Figures 1-8As shown, the endoscope body 1 includes a protective shell 2, a fixing rod 3, a rotating sleeve 4, an arc-shaped scraper 5, a moving assembly, and an isolation assembly. The lens 101 of the endoscope body 1 has an arc-shaped hole 102 on the front right side, and a gap 103 is also opened on the right side of the lens 101. The protective shell 2 is fitted on the outer side of the endoscope body 1. The fixing rod 3 is symmetrically connected to the front and rear of the right side of the lens 101. A rotating sleeve 4 is rotatably connected to each of the two fixing rods 3. An arc-shaped scraper 5 is connected between the two rotating sleeves 4. The arc-shaped scraper 5 has a certain elasticity and toughness, and the left side of the arc-shaped scraper 5 contacts the right side of the lens inside the lens 101. The endoscope body 1 is equipped with a moving assembly for driving the arc-shaped scraper 5 to move. The endoscope body 1 is also equipped with an isolation assembly for isolating and protecting the lens inside the lens 101.

[0030] like Figure 2 , Figure 4 and Figure 5 As shown, the moving assembly includes a swing rod 6, an L-shaped sleeve 7, a short rod 8, a connecting rod 10, and a swing mechanism. The swing rod 6 is rotatably connected to the front interior of the lens 101. The right side of the swing rod 6 is slidably connected to the L-shaped sleeve 7, and the right end of the L-shaped sleeve 7 passes through an arc-shaped hole 102. The left rear side of the L-shaped sleeve 7 is connected to the short rod 8. An arc-shaped groove 9 is formed inside the lens 101, and the rear end of the short rod 8 slides within the arc-shaped groove 9. The right end of the L-shaped sleeve 7 is rotatably connected to the connecting rod 10, and the rear end of the connecting rod 10 is connected to the middle of the arc-shaped scraper 5. The endoscope body 1 has a swing mechanism inside for driving the swing rod 6 to swing; the swing mechanism includes… The endoscope body 1 consists of a U-shaped rod 11, a first sleeve 12, a first pull rope 13, a rotating frame 14, and a lever 15. The upper and lower sides of the swing rod 6 are connected to the U-shaped rod 11. The inner front side of the endoscope body 1 is symmetrically connected to two first sleeves 12. The inner sides of the two first sleeves 12 are slidably connected to the first pull ropes 13, and the right ends of the two first pull ropes 13 are respectively connected to the two U-shaped rods 11. The inner front left side of the endoscope body 1 is rotatably connected to the rotating frame 14. The left ends of the two first pull ropes 13 are respectively connected to the upper and lower sides of the rotating frame 14. The front end of the rotating shaft of the rotating frame 14 extends out of the front side of the endoscope body 1, and the front end of the rotating shaft of the rotating frame 14 is connected to the lever 15.

[0031] like Figures 6-8As shown, the isolation assembly includes a sliding frame 16, silicone baffles 17, an opening and closing mechanism, and a locking mechanism. The sliding frame 16 is slidably connected inside the lens 101. Multiple silicone baffles 17 are circumferentially spaced on the right side of the sliding frame 16. The silicone baffles 17 are made of transparent material and possess a certain degree of elasticity and toughness. All silicone baffles 17 pass through the gap 103, and adjacent silicone baffles 17 are in contact with each other, forming a conical cover on the right side of the lens 101. The endoscope body 1 has an opening and closing mechanism inside for driving the silicone baffles 17 to move and open / close. The endoscope body 1 also has a locking mechanism inside for locking the position of the silicone baffles 17. The opening and closing mechanism includes a return spring 18, a second sleeve 19, a second pull rope 20, a rotating rod 21, a knob 22, and a winding wheel 23. The sliding frame 16... A reset spring 18 is connected between the left side and the inner wall of the lens 101. Three second sleeves 19 are circumferentially connected inside the endoscope body 1. The inner sides of the three second sleeves 19 are slidably connected to second pull ropes 20, and the right ends of the three second pull ropes 20 are connected to the sliding frame 16. A rotating rod 21 is rotatably connected to the left side of the endoscope body 1. Multiple circular grooves 2101 are circumferentially spaced on the upper part of the rotating rod 21. A knob 22 is connected to the lower end of the rotating rod 21. Three winding wheels 23 are circumferentially connected to the rotating rod 21, and the left ends of the three second pull ropes 20 are respectively wound around the three winding wheels 23. The locking mechanism includes a sliding bead 24 and a connecting spring 25. Three sliding beads 24 are slidably connected to the top left side of the endoscope body 1, and the sliding beads 24 are locked in the circular grooves 2101. A connecting spring 25 is connected between the sliding beads 24 and the endoscope body 1.

[0032] In the initial state, such as Figure 2 As shown, the arc-shaped scraper 5 is located on the lower right side of the lens; when the doctor manipulates the endoscope body 1 to enter the human cavity, as... Figure 6As shown, multiple silicone baffles 17 are combined into a conical sleeve, covering the right side of the lens 101, effectively preventing impurities from adhering. Because the silicone baffles 17 are made of transparent material, the doctor can still clearly observe the path of the endoscope through the endoscope body 1 during insertion. When the lens 101 reaches the target position, the doctor rotates the knob 22, which drives the rotating rod 21 to rotate synchronously, overcoming the elasticity of the connecting spring 25 and causing the sliding bead 24 to disengage from the circular groove 2101. The rotating rod 21 drives the winding wheel 23 to rotate, winding the second pull rope 20. The second pull rope 20 pulls the sliding frame 16 to the left, pressing... The retraction spring 18 and sliding bracket 16 move all silicone baffles 17 to the left and retract them into the gap 103. At this time, all silicone baffles 17 are unfolded and no longer obstruct the right side of the lens. After stopping the rotation of knob 22, the sliding bead 24 is re-engaged into the circular groove 2101 under the action of connecting spring 25, locking the rotating rod 21 and thus fixing the unfolded state of the silicone baffles 17. In this state, even if impurities are attached to the surface of the silicone baffles 17, it will not affect the imaging quality of the endoscope body 1. In subsequent operations, if impurities are found on the lens, the doctor can push down the lever 15, which will drive the rotating rod 21 to retract into the gap 103. When the rotating frame 14 rotates, it pulls the upper first pull rope 13 to the left, while simultaneously releasing the lower first pull rope 13. The upper first pull rope 13 pulls the swing rod 6 upward through the U-shaped rod 11, causing the L-shaped sleeve 7 and the short rod 8 to swing upward. The short rod 8 slides upward along the arc groove 9. During the movement, the short rod 8 is guided by the contour of the arc groove 9 and will first move to the left and then to the right, causing the L-shaped sleeve 7 to produce a horizontal displacement on the swing rod 6, ultimately achieving a straight upward trajectory at the right end of the L-shaped sleeve 7. The L-shaped sleeve 7 pushes the middle part of the arc scraper 5 upward through the connecting rod 10. During this process, the arc scraper... 5. Under pressure, the curved scraper blade undergoes elastic deformation into a "W" shape and rotates adaptively on the fixed rod 3 via the rotating sleeve 4. When the center of the curved scraper blade 5 passes the center position between the two fixed rods 3, it quickly returns to its original shape due to its elasticity and is finally positioned on the upper right side of the lens. It is important to emphasize that throughout the entire movement, the curved scraper blade 5 maintains close contact with the lens surface, thereby effectively scraping away impurities attached to the lens surface. When the lens needs to be cleaned again, simply push the lever 15 upward to drive the curved scraper blade 5 to move from top to bottom along the lens surface to complete a new round of cleaning.

[0033] like Figure 9 and Figure 10As shown, it also includes a hollow frame 26, a fan 27, a heating element 28, an air outlet duct 29, an exhaust pipe 30, a mounting rod 31, and a return pipe 32. The hollow frame 26 is connected to the rear left side of the endoscope body 1. The fan 27 is installed on the rear left side of the hollow frame 26, and the air outlet of the fan 27 is in communication with the interior of the hollow frame 26. The heating element 28 is installed inside the hollow frame 26. The air outlet duct 29 is connected to the upper rear side of the interior of the endoscope body 1. The left end of the endoscope body 1 is connected to and maintains communication with the hollow frame 26. The lower rear side of the endoscope body 1 is connected to the exhaust pipe 30, and the left end of the exhaust pipe 30 is connected to the lower right side of the hollow frame 26. Multiple mounting rods 31 are connected at intervals on the right side of the lens 101. A return pipe 32 is connected between the multiple mounting rods 31. The return pipe 32 surrounds the lens. The right ends of the air outlet pipe 29 and the exhaust pipe 30 are respectively connected to the two ends of the return pipe 32 and maintain communication.

[0034] During continuous use of the endoscope body 1, the fan 27 and heating tube 28 can be activated. The heating tube 28 can heat the air inside the hollow frame 26, and the fan 27 can blow the hot air inside the hollow frame 26 into the return tube 32 through the air outlet 29. The gas in the return tube 32 can be discharged out through the exhaust pipe 30, so that there is a continuous flow of hot air inside the return tube 32. The return tube 32 can heat the inside of the lens 101 so that the temperature inside the lens 101 is close to the temperature inside the human body, thereby preventing fogging on the lens surface.

[0035] like Figure 11 As shown, it also includes a rotating ring 33 and a rubber sheet 34. The rotating ring 33 is rotatably connected to the right side of the inside of the lens 101, and the rotating ring 33 blocks the left side of the arc-shaped hole 102. The rubber sheet 34 is connected to the lower front side of the rotating ring 33, and the L-shaped sleeve 7 passes through the rubber sheet 34. When the L-shaped sleeve 7 swings up and down, it will squeeze the rotating ring 33 and the rubber sheet 34 to rotate. The rubber sheet 34 will deform adaptively under pressure so that the rotating ring 33 can always block the left side of the arc-shaped hole 102 to prevent body fluid from entering the inside of the lens 101 through the arc-shaped hole 102.

[0036] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A gastroenterological endoscope for preventing interference from impurities, comprising: an endoscope body (1); characterized in that, The endoscope body (1) has an arc-shaped hole (102) and a gap (103) at the lens (101); it also includes: a protective shell (2) connected to the outside of the endoscope body (1); a fixing rod (3) symmetrically connected to the side of the lens (101); a rotating sleeve (4) rotatably connected to the fixing rod (3); and an arc-shaped scraper (5) connected between the two rotating sleeves (4), and the arc-shaped scraper (5) contacts the lens inside the lens (101); The moving component is located inside the endoscope body (1) and is used to drive the arc-shaped scraper (5) to move; the isolation component is located inside the endoscope body (1) and is used to isolate and protect the lens inside the lens (101).

2. The gastroenterological endoscope for preventing interference from impurities according to claim 1, characterized in that, The moving components include: a swing rod (6), which is rotatably connected to the inside of the lens (101); an L-shaped sleeve (7), which is slidably connected to the swing rod (6), and the end of the L-shaped sleeve (7) passes through the arc-shaped hole (102); a short rod (8), which is connected to the L-shaped sleeve (7), and the inside of the lens (101) has an arc-shaped groove (9), and the short rod (8) slides in the arc-shaped groove (9); a connecting rod (10), which is rotatably connected to the end of the L-shaped sleeve (7), and the connecting rod (10) is connected to the arc-shaped scraper (5); and a swing mechanism, which is located inside the endoscope body (1) and is used to drive the swing rod (6) to swing.

3. A gastroenterological endoscope for preventing interference from impurities according to claim 2, characterized in that, The swing mechanism includes: a U-shaped rod (11), symmetrically connected to the swing rod (6); a first sleeve (12), symmetrically connected to the inside of the endoscope body (1); a first pull rope (13), slidably connected to the inside of the first sleeve (12), and one end of the first pull rope (13) is connected to the U-shaped rod (11); a rotating frame (14), rotatably connected to the inside of the endoscope body (1), and the other end of the first pull rope (13) is connected to the rotating frame (14); and a paddle (15), connected to the rotating shaft of the rotating frame (14).

4. A gastroenterological endoscope for preventing interference from impurities according to claim 1, characterized in that, The isolation assembly includes: a sliding frame (16) slidably connected to the inside of the lens (101); a silicone baffle (17) circumferentially spaced and connected to the side of the sliding frame (16), with the silicone baffle (17) passing through the gap (103) and contacting each other to block the lens side of the lens (101); an opening and closing mechanism, located inside the endoscope body (1), for driving the silicone baffle (17) to move and open and close; and a locking mechanism, located inside the endoscope body (1), for locking the position of the silicone baffle (17).

5. A gastroenterological endoscope for preventing interference from impurities according to claim 4, characterized in that, The opening and closing mechanism includes: a return spring (18), with its two ends connected to the sliding frame (16) and the lens (101) respectively; a second sleeve (19), which is connected to the inside of the endoscope body (1) at intervals; a second pull rope (20), which is slidably connected to the inside of the second sleeve (19), and one end of the second pull rope (20) is connected to the sliding frame (16); a rotating rod (21), which is rotatably connected to the endoscope body (1), and the rotating rod (21) has circumferentially spaced circular grooves (2101); a knob (22), which is connected to the end of the rotating rod (21); and a winding wheel (23), which is connected to the rotating rod (21) at intervals, and the other end of the second pull rope (20) is wound around the winding wheel (23).

6. A gastroenterological endoscope for preventing interference from impurities according to claim 5, characterized in that, The locking mechanism includes: a sliding bead (24) that is slidably connected to the top of the endoscope body (1) at intervals, and the sliding bead (24) is locked in the circular groove (2101); and a connecting spring (25) that is connected to the sliding bead (24) and the endoscope body (1) at both ends respectively.

7. A gastroenterological endoscope for preventing interference from impurities according to claim 2, characterized in that, It also includes: a hollow frame (26), connected to the side of the endoscope body (1); a fan (27), connected to the hollow frame (26) and kept in communication; a heating tube (28), installed inside the hollow frame (26); an air outlet tube (29), connected to the inside of the endoscope body (1), and one end of the air outlet tube (29) is connected to the hollow frame (26) and kept in communication; an exhaust tube (30), connected to the inside of the endoscope body (1), and one end of the exhaust tube (30) is connected to the hollow frame (26); a mounting rod (31), symmetrically connected to the inside of the lens (101); and a return tube (32), connected to the mounting rod (31), and the other ends of the air outlet tube (29) and the exhaust tube (30) are respectively connected to both ends of the return tube (32) and kept in communication.

8. A gastroenterological endoscope for preventing interference from impurities according to claim 2, characterized in that, It also includes: a rotating ring (33), which is rotatably connected to the inside of the lens (101), and the rotating ring (33) blocks the side of the arc-shaped hole (102); a rubber sheet (34), which is connected to the rotating ring (33), and an L-shaped sleeve (7) passes through the rubber sheet (34).

Images