Endoscope optical front end with real-time self-cleaning and anti-pollution imaging functions

Abstract

The invention discloses an endoscope optical front end with real-time self-cleaning and anti-pollution imaging functions. The endoscope optical front end comprises an outer shell with an opening in one end. The optical imaging assembly is arranged in the outer shell; the self-cleaning assembly is matched with the optical imaging assembly and is used for removing pollutants on the surface of the optical imaging assembly; and the anti-pollution imaging adjusting assembly is arranged in the outer shell and is used for compensating imaging distortion. According to the endoscope optical front end with the real-time self-cleaning and anti-pollution imaging functions, through the synergistic effect of the arranged super-hydrophobic composite coating and the micro piezoelectric ceramic vibration piece, initial attachment of pollutants can be effectively reduced through the super-hydrophobic composite coating, attached pollutants can be rapidly and efficiently shaken off through high-frequency micro vibration, and the real-time self-cleaning and anti-pollution imaging functions are achieved. The real-time online cleaning of the lens is realized, the endoscope does not need to be withdrawn, the examination time is remarkably shortened, the examination efficiency is improved, and the pain of a patient is relieved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an endoscope optical front end with real-time self-cleaning and anti-fouling imaging. Background Technology

[0002] Medical gastrointestinal endoscopes are indispensable tools in modern medicine for the diagnosis and treatment of gastrointestinal diseases. Their optical front end, as the core imaging component, directly determines the quality of the acquired images, thus affecting the doctor's clinical diagnosis. During endoscopic examinations, the internal environment of the digestive tract is complex, containing large amounts of gastric juice, intestinal juice, mucus, and undigested food residue, among other contaminants.

[0003] The aforementioned contaminants readily adhere to the lens surface of the endoscope's optical tip during use, causing problems such as blurred images, reduced image contrast, and loss of detail. In severe cases, they can even completely obstruct the field of vision, greatly hindering doctors' observation and assessment of lesions. Current technologies typically employ a hydrophobic coating on the lens surface to mitigate this issue. However, a single hydrophobic coating is insufficient to completely prevent the adhesion of highly viscous mucus and other contaminants. Once contaminants adhere, they cannot be removed in real time, requiring doctors to withdraw the endoscope from the patient and manually clean it before continuing the examination. This significantly prolongs examination time, increases patient discomfort and pain, and disrupts the continuity of the examination. Furthermore, different regions of the digestive tract (such as the stomach, small intestine, and colon) contain media (such as air, gastric juice, and intestinal juice) with varying refractive indices. When light passes through these media with different refractive indices, refractive distortion occurs, further reducing image quality. Current endoscope optical systems are mostly designed with a fixed focal length, unable to dynamically compensate for changes in the refractive index of these media, leading to imaging deviations.

[0004] Therefore, it is necessary to propose an endoscope optical front end with real-time self-cleaning and anti-fouling imaging to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide an endoscope optical front end with real-time self-cleaning and anti-fouling imaging, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An endoscope optical front end with real-time self-cleaning and anti-fouling imaging includes an outer shell with one open end; an optical imaging component disposed inside the outer shell; a self-cleaning component that cooperates with the optical imaging component and is used to remove contaminants from its surface; and an anti-fouling imaging adjustment component disposed inside the outer shell and used to compensate for imaging distortion.

[0008] The self-cleaning component includes a superhydrophobic composite coating applied to the surface of the front lens of the optical imaging component, and a micro piezoelectric ceramic vibrator attached to the lens mount of the optical imaging component, wherein the vibration direction of the micro piezoelectric ceramic vibrator is perpendicular to the optical axis of the optical imaging component.

[0009] The anti-fouling imaging adjustment component includes a miniature liquid lens disposed in the optical path of the optical imaging component and a refractive index detection unit disposed inside the opening end of the outer shell.

[0010] Preferably, the refractive index detection unit includes a light emitter and a light receiver symmetrically arranged inside the opening end of the housing.

[0011] Preferably, the optical imaging assembly includes an optical lens group, an image sensor, and a signal transmission line arranged coaxially in sequence, with the optical lens group close to the opening end of the housing and the signal transmission line away from the opening end of the housing.

[0012] Preferably, the inner wall of the outer casing is provided with a heat insulation layer.

[0013] Preferably, the superhydrophobic composite coating includes a SiO2 transition layer disposed on the lens surface of the optical lens group, a fluorosilane-modified nano-TiO2 layer disposed on the side of the SiO2 transition layer away from the optical lens group, and a perfluoropolyether coating disposed on the side of the fluorosilane-modified nano-TiO2 layer away from the SiO2 transition layer.

[0014] Preferably, a circuit board is provided on the inner side of the housing near the end of the signal transmission line.

[0015] Preferably, the outer shell is provided with a maintenance and inspection component, the maintenance and inspection component includes a first maintenance and inspection port provided on one side of the outer shell, a maintenance and inspection cylinder is movably sleeved on the outer side of the outer shell, and a second maintenance and inspection port adapted to the first maintenance and inspection port is provided on one side of the maintenance and inspection cylinder.

[0016] Preferably, the maintenance and inspection component is provided with a sealing component, the sealing component including a first sealing ring embedded on the outer side of both ends of the outer shell, the first sealing ring corresponding to the end of the first maintenance and inspection port, and a first sealing strip embedded on both sides of the first maintenance and inspection port, and the two ends of the first sealing strip corresponding to the first sealing ring.

[0017] The inner walls at both ends of the inspection tube are fitted with second sealing rings, and the inner walls of the inspection tube are fitted with a pair of second sealing strips corresponding to the first sealing strip.

[0018] Preferably, the outer casing is provided with a secondary sealing assembly, which includes a hollow pressure box installed at one end of the outer casing. The second sealing ring and the second sealing strip are hollow structures that are interconnected. One end of the maintenance tube is provided with an insertion hole communicating with the second sealing ring. One end of the pressure box is movably and sealingly connected to an air tube corresponding to and adapted to the insertion hole. The end of the air tube near the maintenance tube is provided with a notch. A third sealing ring is provided on the outer side of the end of the air tube near the notch. The inner side of the pressure box is away from the air tube. One end of the pressure box is movably and sealed with a piston plate. An air hole is provided on the side of the pressure box near the piston plate. A lead screw is rotatably provided on the inner side of the pressure box near the piston plate. One end of the lead screw extends to the outer side of the pressure box and is provided with a rotating head. The piston plate is threadedly engaged with the lead screw. A connecting bracket corresponding to the air pipe is provided on one side of the piston plate. A guide rod is provided on the side wall of the air pipe near the connecting bracket. The end of the connecting bracket away from the piston plate is movably sleeved on the outer side of the guide rod. A spring is sleeved on the outer side of the end of the guide rod away from the connecting bracket.

[0019] Preferably, one end of the inspection tube and one end of the outer shell are provided with corresponding indicators, and when the two indicators correspond, the air tube just matches the insertion hole.

[0020] Compared with the prior art, the present invention provides an endoscope optical front end with real-time self-cleaning and anti-fouling imaging, which has the following beneficial effects:

[0021] 1. This endoscope optical front end with real-time self-cleaning and anti-fouling imaging utilizes a superhydrophobic composite coating and a micro-piezoelectric ceramic vibrator. The superhydrophobic composite coating effectively reduces initial contaminant adhesion, while the high-frequency micro-vibration quickly and efficiently removes existing contaminants, enabling real-time online cleaning of the lens without the need to withdraw the endoscope. This significantly shortens examination time, improves efficiency, and reduces patient discomfort. A refractive index detection unit monitors changes in the refractive index of the digestive tract medium in real time, and a micro-liquid lens dynamically adjusts the optical focal length, effectively compensating for imaging distortion caused by medium changes. This ensures clear, stable, and accurate images in various digestive tract environments, improving the diagnostic accuracy of lesions. This invention novelly integrates the self-cleaning component and the anti-fouling imaging adjustment component within the limited space of the endoscope front end, resulting in a compact structure and small size, meeting the design requirements for a slender endoscope optical front end. Furthermore, all components use medical-grade materials and mature, stable control logic, ensuring safety in clinical use and reliability in long-term operation.

[0022] 2. The endoscope optical front end with real-time self-cleaning and anti-fouling imaging can be easily opened for maintenance and inspection of the interior of the outer shell through the set maintenance and inspection components. The sealing components can increase the sealing between the maintenance and inspection components and the outer shell, and the secondary sealing components can further enhance the sealing, preventing liquid substances from entering the interior of the outer shell during use. It is easy to operate and has a good sealing effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0025] Figure 3 This is a structural schematic diagram of the inspection cylinder and outer shell of the present invention in a disassembled state;

[0026] Figure 4 This is a schematic diagram of the structure of the inspection cylinder of the present invention;

[0027] Figure 5 This is a schematic diagram of the pressure box of the present invention;

[0028] Figure 6 This is a cross-sectional structural diagram of the pressure box of the present invention;

[0029] Figure 7 This is a schematic cross-sectional view of the superhydrophobic composite coating of the present invention.

[0030] In the diagram: 1. Outer shell; 2. Inspection tube; 3. Signal transmission line; 4. Air vent; 5. Indicator; 6. Light emitter; 7. Light receiver; 8. Optical lens assembly; 9. Miniature piezoelectric ceramic vibrator; 10. Miniature liquid lens; 11. Image sensor; 12. Circuit board; 13. Pressure box; 14. First inspection port; 15. First sealing ring; 16. First sealing strip; 17. Second inspection port; 18. Second sealing ring; 19. Second sealing strip; 20. Insertion hole; 21. Air tube; 22. Rotating head; 23. Lead screw; 24. Piston plate; 25. Connecting frame; 26. Third sealing ring; 27. Notch; 28. Guide rod; 29. ​​Spring; 30. SiO2 transition layer; 31. Fluorosilane modified nano-TiO2 layer; 32. Perfluoropolyether coating. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] like Figure 1-7As shown, an endoscope optical front end with real-time self-cleaning and anti-fouling imaging is specifically demonstrated. First, the optical front end includes an outer shell 1, which is a cylindrical structure with an open front end. The entire shell is made of medical-grade 316L stainless steel with a diameter of 8mm to ensure its biocompatibility and structural strength in the human body. To protect the digestive tract tissue from the heat generated by the internal electronic components during operation and to improve patient comfort, a 0.5mm thick polyimide heat insulation layer is attached to the inner wall of the cylindrical structure.

[0033] Inside the outer casing 1, an optical imaging assembly is provided. This assembly consists of three parts arranged coaxially: an optical lens group 8, an image sensor 11, and a signal transmission line 3. The optical lens group 8 is closest to the front opening of the outer casing 1. It is composed of three spherical lenses and one aspherical lens, with a fixed focal length of 10mm, and is used to acquire optical images of the digestive tract. Following the optical lens group is the image sensor 11. In this embodiment, a 1 / 2.8-inch CMOS sensor with a resolution of up to 4K is used. It is responsible for converting the optical images acquired by the optical lens group 8 into high-definition electrical signals. The rear end of the image sensor 11 is connected via the signal transmission line 3, which is a flexible coaxial cable used to stably transmit the image electrical signals to the rear host of the endoscope.

[0034] To achieve real-time cleaning of the lens surface, the optical front end also includes a self-cleaning component. This self-cleaning component consists of a superhydrophobic composite coating, a micro piezoelectric ceramic vibrator 9, and a control module. The superhydrophobic composite coating is applied to the outer surface of the foremost lens of the optical lens assembly 8. This coating consists of a three-layer structure with a total thickness of 65 nm. Its preparation process is as follows: First, a 20 nm thick SiO2 transition layer 30 is deposited on the lens surface using magnetron sputtering to enhance the adhesion between the coating and the lens substrate. Next, a 30 nm thick fluorosilane-modified nano-TiO2 layer 31 is coated on the SiO2 transition layer 30 using a sol-gel method. Finally, a 15 nm thick layer of all-phase material is coated on the outermost surface using vacuum evaporation. The fluorinated polyether coating 32, the completed composite coating, has a water contact angle of up to 155° and a roll-off angle of less than 4°, exhibiting excellent resistance to liquid and viscous adhesion. The micro piezoelectric ceramic vibrator 9 is a circular piezoelectric ceramic with a diameter of 5mm, which is firmly attached to the metal mount of the optical lens assembly with conductive adhesive. The control module is integrated on a circuit board 12 at the rear of the housing 1. It includes an STM32F103 MCU and an H-bridge drive circuit. The micro piezoelectric ceramic vibrator 9 is electrically connected to the vibration control circuit of the control module. The MCU can precisely control the vibrator to perform high-frequency micro-vibration at a frequency of 30kHz and an amplitude of 8μm through this circuit, and its vibration direction is perpendicular to the optical axis of the optical lens assembly.

[0035] To achieve dynamic adjustment of imaging quality, the optical front end also includes an anti-fouling imaging adjustment component, which consists of a miniature liquid lens 10, a refractive index detection unit, and a drive unit. The miniature liquid lens 10 is a commercial electrowetting liquid lens with a diameter of 6 mm and a focal length adjustment range of 8-15 mm. Structurally, it is positioned between the optical lens group 8 and the image sensor 11 and is coaxial with both. The refractive index detection unit is used to monitor the refractive index of the medium in the digestive tract environment where the endoscope front end is located in real time. It includes a light emitter 6 and a light receiver 7. The light emitter 6 is a 650 nm wavelength laser diode, and the light receiver 7 is a PIN photodiode. The two are symmetrically arranged on the inner side of the opening end of the housing 1, and their respective central axes are at a 45° angle to the optical axis centerline of the optical lens group 8. The drive unit is a piezoelectric ceramic actuator, which is connected to the voltage adjustment structure of the miniature liquid lens through a displacement amplification mechanism. At the same time, the drive unit is also electrically connected to the control module.

[0036] In addition, to facilitate maintenance and inspection, a maintenance and inspection assembly is provided on the outer shell 1. The maintenance and inspection assembly includes a first maintenance and inspection port 14 located on one side of the outer shell 1, and a maintenance and inspection cylinder 2 movably sleeved on the outer side of the outer shell 1. A second maintenance and inspection port 17 adapted to the first maintenance and inspection port 14 is provided on one side of the maintenance and inspection cylinder 2. To achieve sealing, a sealing assembly is provided on the maintenance and inspection assembly. As one embodiment, the sealing assembly includes a first sealing ring 15 embedded on the outer sides of both ends of the outer shell 1. The first sealing ring 15 corresponds to the end of the first maintenance and inspection port 14. A first sealing strip 16 is embedded on both sides of the first maintenance and inspection port 14, and the two ends of the first sealing strip 16 correspond to the first sealing ring 15. A second sealing ring 18 is embedded on the inner walls of both ends of the maintenance and inspection cylinder 2. A pair of second sealing strips 19 corresponding to the first sealing strips 16 are embedded on the inner wall of the maintenance and inspection cylinder 2. In the sealed state, the second sealing strips 19 correspond to the first sealing strips 16, and the second sealing rings 18 correspond to the first sealing rings 15.

[0037] Furthermore, to further enhance the sealing performance, a secondary sealing assembly is provided on the outer casing 1. In a preferred embodiment, the secondary sealing assembly includes a hollow pressure box 13 installed at one end of the outer casing 1. The second sealing ring 18 and the second sealing strip 19 are configured as interconnected hollow structures. One end of the maintenance cylinder 2 is provided with an insertion hole 20 communicating with the second sealing ring 18. One end of the pressure box 13 is movably and sealed with an air tube 21 corresponding to and adapted to the insertion hole 20. The end of the air tube 21 near the maintenance cylinder 2 is provided with a notch 27. A third sealing ring 26 is provided on the outer side of the end of the air tube 21 near the notch 27. The third sealing ring 26 is used to increase the sealing performance between the air tube 21 and the insertion hole 20. The inner side of the pressure box 13 away from the air tube 21 is movably sealed. A piston plate 24 is connected to the pressure box 13. An air hole 4 is provided on the side of the pressure box 13 near the piston plate 24. A lead screw 23 is rotatably provided on the inner side of the pressure box 13 near the piston plate 24. One end of the lead screw 23 extends to the outer side of the pressure box 13 and is provided with a rotating head 22. The piston plate 24 is threadedly engaged with the lead screw 23. A connecting bracket 25 corresponding to the air pipe 21 is provided on one side of the piston plate 24. A guide rod 28 is provided on the side wall of the end of the air pipe 21 near the connecting bracket 25. The end of the connecting bracket 25 away from the piston plate 24 is movably sleeved on the outer side of the guide rod 28. A spring 29 is sleeved on the outer side of the end of the guide rod 28 away from the connecting bracket 25. One end of the maintenance cylinder 2 and one end of the outer shell 1 are provided with corresponding indicator marks 5. When the two indicator marks 5 correspond, the air pipe 21 is exactly matched with the insertion hole 20.

[0038] The specific working principle of this optical front end is as follows: During use, in the process of endoscopic examination, the refractive index detection unit of the anti-fouling imaging adjustment component works continuously. Its light emitter 6 continuously emits a 650nm monochromatic light beam. After being reflected by the medium in the digestive tract, such as gastric juice or intestinal juice, the light beam is received by the light receiver 7. The light receiver 7 converts the intensity of the received light signal into an electrical signal and transmits it to the control module. According to the preset calibration relationship, the MCU calculates the refractive index of the current medium in real time by analyzing the change in the refraction angle of the reflected light signal. The detection accuracy can reach ±0.001. When the MCU detects that the change in the refractive index of the medium exceeds the preset threshold of 0.005, it indicates that the endoscope has entered a different medium region, and will immediately change the application through the drive unit. A voltage is applied to the micro liquid lens 10 to precisely adjust its radius of curvature to change the system focal length, dynamically compensating for imaging distortion caused by changes in the refractive index of the medium. At the same time, the control module of the self-cleaning component continuously analyzes the image sharpness parameters output in real time by the image sensor 11. When the MCU determines that the image sharpness is lower than the preset threshold due to contaminant adhesion, it will activate the self-cleaning function. The vibration control circuit drives the micro piezoelectric ceramic vibrator 9 to generate high-frequency micro-vibration for 3-5 seconds. This high-frequency vibration perpendicular to the optical axis can effectively shake off the contaminants attached to the surface of the superhydrophobic composite coating, thereby quickly restoring the image sharpness. Once the MCU detects that the image sharpness has recovered to above the threshold, it stops vibrating.

[0039] The maintenance principle is as follows: During maintenance, the rotating head 22 is turned using a screwdriver or similar tool. The rotating head 22 drives the lead screw 23 to rotate, which in turn causes the piston plate 24 and connecting frame 25 to shift as a whole. The spring 29 gradually returns to its original position. Subsequently, the connecting frame 25 pulls the air tube 21 to shift via the guide rod 28, causing one end of the air tube 21 to disengage from the insertion hole 20. This causes the second sealing strip 19 and the second sealing ring 18 to deflate and contract, reducing the pressure on the first sealing ring 15 and the first sealing strip 16. Then, the maintenance cylinder 2 is rotated so that the second maintenance port 17 matches the first maintenance port 14. Maintenance work is then performed. When sealing again, the maintenance cylinder 2 is turned so that it closes the first maintenance port 14 and the two indicator marks 5 correspond. At this time, the second sealing strip 19 matches the first sealing strip 16, and the insertion hole 20 always matches the first sealing ring 15. Then, the second sealing strip 19 matches the first sealing strip 16, and the insertion hole 20 always matches the first sealing ring 15. Twisting the rotating head 22 in the opposite direction causes the lead screw 23 to move the connecting frame 25. The connecting frame 25 first pushes the air tube 21 to move by the elastic force of the spring 29, so that one end of the air tube 21 enters the insertion hole 20. After insertion, the air tube 21 cannot move further. As the connecting frame 25 continues to move, it will compress the spring 29. The displacement of the piston plate 24 will squeeze the gas at one end of the pressure box 13. The gas enters the inner side of the second sealing ring 18 and the second sealing strip 19 through the notch 27 on the air tube 21, causing the second sealing ring 18 and the second sealing strip 19 to expand. As a result, the second sealing ring 18 and the second sealing strip 19 can fit more tightly on the first sealing ring 15 and the first sealing strip 16, thereby achieving a good sealing effect. The air hole 4 is used for the air to enter and exit at one end when the piston plate 24 moves. The third sealing ring 26 can increase the sealing between the air tube 21 and the inner wall of the insertion hole 20.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An endoscope optical front end with real-time self-cleaning and anti-fouling imaging, comprising: It includes an outer shell (1) with one end open; an optical imaging assembly disposed inside the outer shell (1); a self-cleaning assembly that cooperates with the optical imaging assembly and is used to remove contaminants from its surface; and an anti-fouling imaging adjustment assembly disposed inside the outer shell (1) and used to compensate for imaging distortion. The self-cleaning component includes a superhydrophobic composite coating applied to the surface of the front lens of the optical imaging component, and a micro piezoelectric ceramic vibrator (9) attached to the lens mount of the optical imaging component. The vibration direction of the micro piezoelectric ceramic vibrator (9) is perpendicular to the optical axis of the optical imaging component. The anti-fouling imaging adjustment component includes a miniature liquid lens (10) disposed in the optical path of the optical imaging component and a refractive index detection unit disposed inside the opening end of the outer shell (1).

2. The optical front end of an endoscope with real-time self-cleaning and anti-fouling imaging according to claim 1, characterized in that: The refractive index detection unit includes a light emitter (6) and a light receiver (7) symmetrically arranged inside the opening of the outer shell (1).

3. The optical front end of an endoscope with real-time self-cleaning and anti-fouling imaging according to claim 1, characterized in that: The optical imaging assembly includes an optical lens group (8), an image sensor (11), and a signal transmission line (3) arranged coaxially in sequence. The optical lens group (8) is close to the opening end of the housing (1), and the signal transmission line (3) is far away from the opening end of the housing (1).

4. The optical front end for endoscope with real-time self-cleaning and anti-fouling imaging of claim 1, wherein: The inner wall of the outer shell (1) is provided with a heat insulation layer.

5. The optical front end of an endoscope with real-time self-cleaning and anti-fouling imaging according to claim 1, characterized in that: The superhydrophobic composite coating includes a SiO2 transition layer (30) disposed on the lens surface of the optical lens group (8), a fluorosilane-modified nano-TiO2 layer (31) disposed on the side of the SiO2 transition layer (30) away from the optical lens group (8), and a perfluoropolyether coating (32) disposed on the side of the fluorosilane-modified nano-TiO2 layer (31) away from the SiO2 transition layer (30).

6. The optical front end for endoscope with real-time self-cleaning and anti-fouling imaging of claim 1, wherein: A circuit board (12) is provided on the inner side of the outer casing (1) near the end of the signal transmission line (3).

7. An endoscope optical front end with real-time self-cleaning and anti-fouling imaging as described in claim 1, characterized in that: The outer shell (1) is provided with a maintenance and inspection component. The maintenance and inspection component includes a first maintenance and inspection port (14) located on one side of the outer shell (1). A maintenance and inspection cylinder (2) is movably sleeved on the outer side of the outer shell (1). A second maintenance and inspection port (17) adapted to the first maintenance and inspection port (14) is provided on one side of the maintenance and inspection cylinder (2).

8. An endoscope optical front end with real-time self-cleaning and anti-fouling imaging as described in claim 7, characterized in that: The maintenance and inspection component is provided with a sealing component, which includes a first sealing ring (15) embedded on the outer side of both ends of the outer shell (1). The first sealing ring (15) corresponds to the end of the first maintenance and inspection port (14). The two sides of the first maintenance and inspection port (14) are each provided with a first sealing strip (16), and the two ends of the first sealing strip (16) correspond to the first sealing ring (15). The inner walls of both ends of the inspection tube (2) are fitted with second sealing rings (18), and the inner walls of the inspection tube (2) are fitted with a pair of second sealing strips (19) corresponding to the first sealing strip (16).

9. An endoscope optical front end with real-time self-cleaning and anti-fouling imaging as described in claim 8, characterized in that: A secondary sealing assembly is provided on the outer shell (1). The secondary sealing assembly includes a pressure box (13) installed at one end of the outer shell (1) and is hollow. The second sealing ring (18) and the second sealing strip (19) are hollow structures that are interconnected. One end of the maintenance tube (2) is provided with an insertion hole (20) that communicates with the second sealing ring (18). One end of the pressure box (13) is movably and sealed with an air tube (21) that corresponds to and is adapted to the insertion hole (20). The end of the air tube (21) near the maintenance tube (2) is provided with a notch (27). The outer side of the end of the air tube (21) near the notch (27) is provided with a third sealing ring (26). The inner side of the pressure box (13) away from the air tube (21) is movably and sealed with a piston plate. (24) The pressure box (13) is provided with an air hole (4) on the side near the piston plate (24). A screw (23) is rotatably provided on the inner side of the pressure box (13) near the piston plate (24). One end of the screw (23) extends to the outer side of the pressure box (13) and is provided with a rotating head (22). The piston plate (24) is threadedly engaged with the screw (23). A connecting frame (25) corresponding to the air pipe (21) is provided on one side of the piston plate (24). A guide rod (28) is provided on the side wall of the end of the air pipe (21) near the connecting frame (25). The end of the connecting frame (25) away from the piston plate (24) is movably sleeved on the outer side of the guide rod (28). A spring (29) is sleeved on the outer side of the end of the guide rod (28) away from the connecting frame (25).

10. An endoscope optical front end with real-time self-cleaning and anti-fouling imaging as described in claim 9, characterized in that: One end of the inspection tube (2) and one end of the outer shell (1) are provided with corresponding indicator marks (5), and when the two indicator marks (5) correspond, the air tube (21) matches the insertion hole (20).

Images