Multifunctional transparent cap of painless gastrointestinal endoscope

Abstract

The invention relates to the technical field of medical instruments, in particular to a multifunctional transparent cap of a painless gastrointestinal endoscope. The multifunctional transparent cap comprises an insertion tube, the side face of the insertion tube is provided with a deformation protection structure used for dilating and observing lesions, the insertion tube is internally provided with an adjusting structure used for resecting the lesions, and the deformation protection structure and the adjusting structure are located on the same horizontal line. Normal tissues of a patient can be protected, meanwhile, when the endoscope tube moves to drive the transparent cap and the side hole to deform, the transparent cap deforms to be cylindrical, so that medical staff can more accurately observe the lesion subsequently, and when the side hole deforms to the maximum, gas not exhausted by the transparent cap can be prevented from atomizing an objective lens in the transparent cap, so that the medical staff can observe the lesion more accurately. And meanwhile, entering gas can be quickly discharged from the deformed side holes, so that subsequent resection of lesions by workers is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a multifunctional transparent cap of a painless gastroenteroscope. Background Art

[0002] The transparent cap is a transparent cap-shaped object installed at the end of the gastrointestinal lens, mainly used to assist endoscopic operation and diagnosis and treatment. The main functions of the transparent cap include protecting the lens, exposing the visual field, assisting in hemostasis, removing foreign bodies, and assisting in minimally invasive treatment under endoscopy. Most of the existing transparent caps are in the shape of straight cylinder, oblique mouth, dome and duckbill, etc. However, most of the existing ones are in the shape of straight cylinder, because during gastroscopy, the straight cylinder transparent cap can provide a more direct field of view. For observing the relatively open areas in the stomach, such as the stomach body, gastric antrum and other parts, the straight cylinder transparent cap can play a good role and help doctors clearly see the situation of the mucosal surface. However, when this straight cylinder enters the patient's stomach, the straight cylinder transparent cap has a large diameter, which is easy to cause discomfort or damage the patient's normal intestinal tissue when entering the patient's stomach, because the patient's intestines are constantly peristaltic, and the straight cylinder transparent cap is easy to contact with the patient's intestines, thereby easily damaging the patient's normal intestinal tissue; In addition, when existing medical staff use the gastrointestinal scope and the transparent cap to cooperate, they need to remove the lesion when they find it needs to be removed. However, after the patient's lesion is removed with forceps, the lesion is taken out with forceps or a snare. However, the forceps used for gastrointestinal surgery are usually thinner, and the doctor needs to accurately control the opening and closing degree and clamping force of the forceps to ensure that the lesion tissue is firmly clamped to avoid falling off during the removal process. Therefore, when the lesion is taken out with forceps, the lesion is easy to detach from the forceps, and the removed lesion will fall into the patient's stomach and intestines, further endangering the patient's life. In view of this, we propose a multifunctional transparent cap for a painless gastroenteroscope. Summary of the invention

[0003] The object of the present invention is to provide a multifunctional transparent cap for a painless gastroenteroscope to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides a multifunctional transparent cap for a painless gastroscope, comprising an insertion tube, a deformation protection structure for expanding and observing lesions is arranged on the side of the insertion tube, an adjustment structure for removing lesions is arranged inside the insertion tube, and the deformation protection structure and the adjustment structure are at the same horizontal line; When in use, the adjusting structure is moved close to the lesion to facilitate cutting, and the deformable protective structure is driven to become cylindrical to expand the observation range. When not in use, the adjusting structure is reset, moved and pulled out, and the deformable protective structure is driven to become conical to clamp out the lesion.

[0005] Preferably, the deformation protection structure comprises a transparent cap and an observation port, the transparent cap and the insertion tube are detachably mounted, the observation port is arc-shaped, and a side hole is provided on the side of the transparent cap.

[0006] Preferably, the adjustment structure includes an endoscope tube, which is slidably connected to the inner wall of the insertion tube, and the outer ring surface of the endoscope tube is provided with two groups of sliding grooves, and two groups of sliding blocks are slidably connected inside the two groups of sliding grooves respectively, and the two groups of sliding blocks are fixedly connected to the inner wall of the insertion tube at a side away from the sliding grooves, and the end of the endoscope tube close to the sliding block is fixedly connected to a cylindrical tube for deforming the transparent cap, and an adjustment port is opened through the side of the cylindrical tube, and the end of the cylindrical tube away from the endoscope tube is set to an arc shape.

[0007] Preferably, an objective lens for observing lesions is provided at one end of the endoscope tube close to the cylindrical barrel, and a forceps channel opening is also provided at one end of the endoscope tube close to the cylindrical barrel for facilitating the forceps to enter the patient's stomach and intestines. The objective lens is arranged at the center of the endoscope tube, the size of the objective lens is adapted to the minimum state of the observation port, and the forceps channel opening is arranged on the side of the objective lens.

[0008] Preferably, when the transparent cap is in a conical shape, the cylindrical tube fixed at the end of the endoscope tube is located at the end of the transparent cap close to the endoscope tube; when the transparent cap is in a cylindrical shape, the cylindrical tube fixed at the end of the endoscope tube is located near the observation port.

[0009] Preferably, when the transparent cap is in a conical shape, the sliding block is placed close to the end of the endoscope tube, and when the transparent cap is in a cylindrical shape, the sliding block is placed away from the end of the endoscope tube.

[0010] Preferably, when the transparent cap is in a conical shape, the side hole and the observation port are in an undeformed state, and when the transparent cap is in a cylindrical shape, the side hole and the observation port are in a deformed state.

[0011] Preferably, when the side hole is not deformed, the smaller part of the adjustment opening is matched with the undeformed side hole, and when the side hole is deformed, the larger part of the adjustment opening is matched with the deformed side hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In the multifunctional transparent cap of the painless gastroenteroscope, when the transparent cap and the side hole are not deformed, the normal tissues of the patient can be protected. At the same time, when the endoscope tube moves to drive the transparent cap and the side hole to deform, the transparent cap is deformed into a cylindrical shape, which can improve the accuracy of subsequent observation of lesions by medical staff. When the side hole is deformed to the maximum, the gas that has not been discharged from the transparent cap can be prevented from fogging the objective lens in the transparent cap. At the same time, the gas that has entered can be quickly discharged from the deformed side hole, thereby improving the subsequent removal of lesions by the staff.

[0013] 2. In the multifunctional transparent cap of the painless gastroenteroscope, after the transparent cap and the side hole are reset and deformed, the deformed conical transparent cap can protect the lesion clamped by tweezers. On the one hand, it is to reduce the range of movement of the lesion, so that even if the lesion clamped by the medical staff is detached, the lesion cannot fall off. On the other hand, after the lesion is cut and stretched out, the transparent cap can also reduce the protection of the patient's normal gastrointestinal tissue, which is beneficial to improve the effect of lesion removal and reduce the damage to the patient's normal tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention; Figure 2 It is a cutaway stereoscopic view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the assembly and disassembly of the overall structure of the present invention; Figure 4 It is a cutaway perspective view of the deformation protection structure of the present invention; Figure 5 It is a schematic diagram of the regulating structure of the present invention; Figure 6 It is a schematic diagram of the motion state of the overall structure of the present invention; Figure 7 It is a schematic diagram of the overall structure of the present invention after the motion state; Figure 8 It is a rear cutaway stereoscopic diagram of the overall structure of the present invention in a moving state; Fig. 9 It is a schematic diagram of the overall structure of the present invention in a reset state; Fig.10 for Fig. 9 Enlarged schematic diagram at point A in the middle.

[0015] The meaning of each number in the figure is: 1. Insertion tube; 200. Deformation protection structure; 201. Transparent cap; 202. Side hole; 203. Observation port; 300. Adjustment structure; 301. Endoscope tube; 302. Objective lens; 303. Forceps channel opening; 304. Cylindrical tube; 305. Adjustment port; 306. Slide groove; 307. Sliding block. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The existing straight-cylindrical transparent cap 201 has a large diameter, which can easily cause discomfort or damage the patient's normal intestinal tissue when entering the patient's stomach and intestines, because the patient's intestines are constantly peristaltic, and the straight-cylindrical transparent cap 201 can easily contact the patient's intestines, thereby damaging the patient's normal intestinal tissue. In addition, when the existing medical staff finds a lesion using the gastrointestinal lens and the transparent cap 201, it needs to be removed. However, after the patient's lesion is removed by forceps, the lesion needs to be taken out by forceps or a snare. However, the forceps used for the stomach and intestines are usually thinner, and the doctor needs to accurately control the opening and closing degree and the clamping force of the forceps to ensure that the lesion tissue is firmly clamped to avoid falling off during the removal process. Therefore, when the lesion is taken out by forceps, the lesion is easy to detach from the forceps, and the removed lesion falls into the patient's stomach and intestines, further endangering the patient's life. For this purpose, we propose a multifunctional transparent cap 201 for painless gastroenteroscope, please refer to Figure 1-Figure 10 , comprising an insertion tube 1, a deformation protection structure 200 for expanding and observing lesions is arranged on the side of the insertion tube 1, an adjustment structure 300 for removing lesions is arranged inside the insertion tube 1, and the deformation protection structure 200 and the adjustment structure 300 are at the same horizontal line; When in use, the adjusting structure 300 is moved close to the lesion to facilitate cutting, and the deformable protective structure 200 is driven to change into a cylindrical shape to expand the observation range. When not in use, the adjusting structure 300 is reset, moved and pulled out, and the deformable protective structure 200 is driven to change into a cone shape to clamp out the lesion. In addition, please refer to Figure 1-Figure 6 , it is necessary to disclose the specific structural connection method in detail. The deformation protection structure 200 and the adjustment structure 300 are both detachably installed with the insertion tube 1, and the deformation protection structure 200 and the adjustment structure 300 are also detachably installed. The specific connection method is to connect through a plug (not marked in the text) of the deformation protection structure 200 and a socket (not marked in the text) of another adjustment structure 300. The principle is that the plug is usually a protrusion with a certain shape and size, and the socket is a matching concave part. After the plug is inserted into the socket, it is fixed by friction, clamping, etc. When disassembling, the plug is directly pulled out That is, this detachable connection method allows, on the one hand, the deformable protective structure 200 to be separated from the adjustment structure 300 for easy cleaning after use, and on the other hand, a suitable deformable protective structure 200 can be replaced according to the specific conditions of the patient's gastrointestinal lesions. Because the gastrointestinal tracts of different patients are different in shape, size and structure, for example, some patients have a larger intestinal curvature, and some patients may have a relatively small stomach cavity. By replacing the transparent cap 201 suitable for the patient's gastrointestinal tract, it can better fit the gastrointestinal wall, expand the lumen, and reduce the blind spot of observation, thereby improving the accuracy of subsequent observation of lesions by medical staff; The lesions here refer to polyps or adenomatous lesions. Intestinal polyps refer to the protruding growths on the surface of the intestinal mucosa, which are usually formed due to excessive proliferation of intestinal mucosal cells. Adenomatous lesions are a type of polyp with the potential for malignant transformation. Their occurrence is related to genetic factors, long-term chronic inflammatory stimulation, and bad eating habits. On the basis of the above, the following specific structures need to be disclosed in detail: First, the deformable protective structure 200 should be inserted into the patient's stomach to better enter and reduce damage to the patient's normal tissue. The following specific structures need to be disclosed in detail. Please refer to Figure 1-Figure 6 The deformation protection structure 200 includes a transparent cap 201 and an observation port 203. The transparent cap 201 and the insertion tube 1 are detachably installed. The connection method is the same as the connection method of the plug and the socket mentioned above. In addition, a side hole 202 for discharging air pressure is opened through the side of the transparent cap 201. An observation port 203 is opened at the end of the transparent cap 201 away from the insertion tube 1. The observation port 203 is set in an arc shape, and the specific arc angle is between 100 degrees and 180 degrees. This is because the observation port 203 will first contact the patient's stomach when entering the patient's stomach. Therefore, the observation port 203 is set in an arc shape. On the one hand, it can reduce the damage of the sharp part to the patient's normal gastrointestinal tissue when entering the patient's stomach. On the other hand, this angle of the arc port can be more convenient when entering the patient's stomach and other parts. The angle of the transparent cap 201 is well fitted to the stomach wall to reduce damage to the gastric mucosa, and at the same time provide a suitable viewing angle for observation and operation. Next, the transparent cap 201 is set with silicone, specifically set to medical grade silicone, because medical grade silicone is a silicone material specially used in the medical field, it has good biocompatibility, which means that the human immune system and tissues react less to it, and it is not easy to cause adverse reactions such as allergies and inflammation. Its chemical properties are stable and will not react chemically with gastric acid, digestive enzymes and other substances in the stomach and intestines. It is also flexible, on the one hand to avoid damage to the stomach and intestines due to chemical corrosion or the production of harmful substances, and on the other hand to protect the gastrointestinal mucosa from collision with the observation port 203. Here, it is explained that the insertion tube 1 and the transparent cap 201 are set to the same silicone, and the benefits are the same as those of the transparent cap 201; Next, in order to describe the specific position of the adjustment structure 300, the following specific structure needs to be disclosed in detail, please refer to Figure 1-Figure 6The adjustment structure 300 includes an endoscope tube 301, which is slidably connected to the inner wall of the insertion tube 1. Two groups of slide grooves 306 are provided on the outer ring surface of the endoscope tube 301. Two groups of sliding blocks 307 are slidably connected inside the two groups of slide grooves 306. The two groups of sliding blocks 307 are fixedly connected to the inner wall of the insertion tube 1 at one side away from the slide grooves 306. As for the two groups of slide grooves 306 and sliding blocks 307, they are respectively provided with two groups on the outer ring surface of the endoscope tube 301 to limit the position of the endoscope tube 301 when it is pushed by medical staff, so as to prevent the endoscope tube 301 from rotating during the moving process, which affects the medical staff's observation of the patient's lesions. As for the blocks (not shown in the text) provided at both ends of the slide groove 306, they are to block the sliding block 307 when the sliding block 307 slides the maximum distance, which is beneficial to improve the stability of the slide groove 306 during the movement process and prevent the sliding block 307 from sliding off the slide groove 306. The end of the endoscope tube 301 close to the sliding block 307 is fixedly connected to a cylindrical tube 304 for deforming the transparent cap 201. An adjustment port 305 is provided through the side of the cylindrical tube 304. The end of the cylindrical tube 304 away from the endoscope tube 301 is set to an arc shape. It is explained here that the arc shape of one end of the cylindrical tube 304 has the same advantages and angles as the setting of the observation port 203. In order to describe other structures of the adjustment structure 300 in more detail, the following specific structures need to be disclosed in detail, please refer to Figure 1-Figure 6 The end of the endoscope tube 301 close to the cylindrical tube 304 is provided with an objective lens 302 for observing lesions. The end of the endoscope tube 301 close to the cylindrical tube 304 is also provided with a forceps channel opening 303 for facilitating the forceps to enter the patient's stomach. The objective lens 302 is arranged at the center of the endoscope tube 301. The purpose of being arranged at the center of the endoscope tube 301 is to facilitate penetrating the patient's lesions and determining the position. The size of the objective lens 302 is mutually adapted to the minimum state of the observation port 203. The forceps channel opening 303 is arranged beside the objective lens 302. In addition, the adjustment port 305 is transparently arranged to facilitate medical staff to observe lesions without being affected; The following describes a detailed movement process for protecting the patient's stomach and intestines. First, the medical staff needs to install the deformable protection structure 200 as a whole to the end of the insertion tube 1, and the adjustment structure 300 as a whole to the inside of the insertion tube 1. Then the medical staff will insert the installed insertion tube 1 into the patient's stomach and intestines. At this time, because the transparent cap 201 is set at the front end, it will first contact the patient's stomach and intestines. Even if the front end of the transparent cap 201 accidentally contacts the patient's normal stomach and intestine tissue, the observation port 203 can reduce the damage to the patient's normal stomach and intestine tissue. However, the conical transparent cap 201 in the initial state can prevent the patient's stomach and intestines from moving, reduce the contact between the transparent cap 201 and the patient's stomach and intestines, and reduce the damage to the normal part of the patient's stomach and intestines. At the same time, in the process of probing into the observation of the lesion, since the initial opening of the observation port 203 is small, the patient's stomach and intestines A small amount of gas generated during normal operation will enter the transparent cap 201. Even the gas that enters can be discharged from the side hole 202, so as to minimize the gas that enters the transparent cap 201 during normal operation. This is because there is a certain amount of gas in the human stomach and intestines at ordinary times. However, under normal physiological conditions, these gases are in a relatively stable distribution and pressure state. When the transparent cap 201 is inserted, if the gas is not exhausted in time, the injected air or the original gas will gather, which will cause the pressure in the stomach and intestines to increase and cause excessive expansion of the stomach and intestines. This will not only change the normal shape and physiological curvature of the stomach and intestines, but also may affect the normal peristalsis and digestive function of the stomach and intestines, and may even cause serious complications such as intestinal perforation in extreme cases. Therefore, when the transparent cap 201 is inserted into the patient's stomach and intestines, a side hole 202 needs to be opened on the side of the transparent cap 201 to facilitate the normal operation of the patient's stomach and intestines. When the deformable protection structure 200 and the insertion tube 1 are inserted into the patient's stomach and intestines, the medical staff can observe the lesions in the patient's stomach and intestines through the objective lens 302. Even if the end of the endoscope tube 301 close to the objective lens 302 is provided with a transparent cap 201 and a cylindrical tube 304, the transparent cap 201 and the cylindrical tube 304 are transparent, and therefore do not affect the observation range of the objective lens 302. When the medical staff observes and needs to cut the lesion, the medical staff can push the endoscope tube 301 to slide inside the insertion tube 1, so that the slide groove 306 provided on the outer annular surface of the endoscope tube 301 slides linearly under the limit of the sliding block 307 fixed on the insertion tube 1, so that the endoscope tube 301 will not rotate accidentally during the sliding process, so that the angle of the objective lens 302 will not change, but can only approach the lesion, thereby keeping the lesion observed by the medical staff through the objective lens 302 always at a fixed angle, and the endoscope tube 301 can be brought close to the lesion position, which is convenient for subsequent medical staff to perform other treatment methods such as resection of the lesion; When the endoscope tube 301 moves toward the patient's lesion, it will simultaneously drive the cylindrical tube 304 to move toward the lesion. When the cylindrical tube 304 gradually moves, it will contact the inner side of the transparent cap 201, so that the transparent cap 201 changes from a cone to a cylinder. For details, please refer to Figure 7 When the transparent cap 201 is deformed, the side hole 202 provided on the side of the transparent cap 201 and the observation port 203 provided on the end of the transparent cap 201 will synchronously change from a smaller state to a larger state. This is because when the transparent cap 201 is deformed as a whole under the action of an external force, the side hole 202 and the observation port 203 provided on the side of the transparent cap 201 will also be stretched or compressed accordingly. Since the transparent cap 201, the side hole 202 and the observation port 203 are an integral whole, the size and shape of the side hole 202 and the observation port 203 will inevitably change with the deformation of the transparent cap 201 body. Therefore, when the transparent cap 201 is deformed into a cylindrical shape, it can wrap the patient's lesion and facilitate subsequent medical personnel to remove it. In addition, the side hole 2 02 and the observation port 203 will change from a smaller state to a larger state respectively. Considering that the amount of gas entering the enlarged observation port 203 will increase in the future, the side hole 202 will also become larger, so that the air pressure in the transparent cap 201 can be quickly discharged. This is because when the observation port 203 becomes larger, the side hole 202 will also become larger, so that the ratio of the gas entering the observation port 203 and the gas discharged from the side hole 202 is the same, thereby preventing the undischarged gas from atomizing the objective lens 302 in the transparent cap 201 and blocking the objective lens 302 to affect the field of view and operation. Then, when it is necessary to remove the lesion, the medical staff will insert the tweezers or other medical tools from the tweezers channel opening 303 and remove the patient's lesion. In order to realize the clipping of the patient's lesion, the following specific structure needs to be disclosed in detail: when the transparent cap 201 is in a conical shape, the sliding block 307 is placed close to the end of the endoscope tube 301; when the transparent cap 201 is in a cylindrical shape, the sliding block 307 is placed away from the end of the endoscope tube 301; When the transparent cap 201 is in a conical shape, the cylindrical tube 304 fixed at the end of the endoscope tube 301 is located at the end of the transparent cap 201 close to the endoscope tube 301; when the transparent cap 201 is in a cylindrical shape, the cylindrical tube 304 fixed at the end of the endoscope tube 301 is located near the observation port 203; When the transparent cap 201 is in a conical shape, the side hole 202 and the observation port 203 are in an undeformed state, and when the transparent cap 201 is in a cylindrical shape, the side hole 202 and the observation port 203 are in a deformed state; When the side hole 202 is not deformed, the smaller part of the adjustment opening 305 is matched with the undeformed side hole 202, and when the side hole 202 is deformed, the larger part of the adjustment opening 305 is matched with the deformed side hole 202; When the medical staff removes the patient's lesion, the staff will reset and pull out the endoscope tube 301, so that the endoscope tube 301 moves synchronously and changes the deformed cylindrical transparent cap 201 back to a conical shape, and the rear side hole 202 and the observation port 203 are synchronously deformed to a smaller state. Then, when the medical staff removes the lesion with tweezers, the tweezers will clamp the lesion. At the same time, the deformed conical transparent cap 201 can protect the lesion clamped by the tweezers. On the one hand, it is to reduce the range of movement of the lesion. Even if the lesion clamped by the medical staff is detached, the lesion cannot fall off. On the other hand, after the lesion is cut, when it is pulled out, the transparent cap 201 can also reduce the protection of the patient's normal gastrointestinal tissue, which is beneficial to improve the effect of lesion removal and reduce damage to the patient's normal tissue.

[0018] The above shows and describes 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 by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multifunctional transparent cap for a painless gastroenteroscope, comprising an insertion tube (1), characterized in that: A deformable protective structure (200) for expanding and observing lesions is arranged on the side of the insertion tube (1), and an adjustment structure (300) for removing lesions is arranged inside the insertion tube (1), wherein the deformable protective structure (200) and the adjustment structure (300) are located at the same horizontal line; When in use, the adjusting structure (300) is moved close to the lesion to facilitate cutting, while driving the deformable protective structure (200) to change into a cylindrical shape to expand the observation range; when not in use, the adjusting structure (300) is reset, moved and pulled out, while driving the deformable protective structure (200) to change into a conical shape to clamp out the lesion.

2. The multifunctional transparent cap for painless gastroenteroscope according to claim 1, characterized in that: The deformation protection structure (200) comprises a transparent cap (201) and an observation port (203); the transparent cap (201) and the insertion tube (1) are detachably mounted; the observation port (203) is arranged in an arc shape; and a side hole (202) for discharging air pressure is provided on the side of the transparent cap (201).

3. The multifunctional transparent cap for painless gastroenteroscope according to claim 1, characterized in that: The adjustment structure (300) comprises an endoscope tube (301), wherein the endoscope tube (301) is slidably connected to the inner wall of the insertion tube (1), and the outer annular surface of the endoscope tube (301) is provided with two groups of slide grooves (306), and two groups of sliding blocks (307) are slidably connected inside the two groups of slide grooves (306), respectively, and the two groups of sliding blocks (307) are fixedly connected to the inner wall of the insertion tube (1) at a side away from the slide grooves (306), and a cylindrical tube (304) for deforming the transparent cap (201) is fixedly connected to one end of the endoscope tube (301) close to the sliding block (307), and an adjustment port (305) is provided through the side of the cylindrical tube (304), and the end of the cylindrical tube (304) away from the endoscope tube (301) is arranged in an arc shape.

4. The multifunctional transparent cap for painless gastroenteroscope according to claim 3, characterized in that: An objective lens (302) for observing lesions is arranged at one end of the endoscope tube (301) close to the cylindrical tube (304), and a forceps channel opening (303) for facilitating forceps to enter the patient's stomach is also arranged at one end of the endoscope tube (301) close to the cylindrical tube (304). The objective lens (302) is arranged at the center of the endoscope tube (301), and the size of the objective lens (302) is mutually adapted to the minimum state of the observation port (203). The forceps channel opening (303) is arranged beside the objective lens (302).

5. The multifunctional transparent cap for painless gastroenteroscope according to claim 2, characterized in that: When the transparent cap (201) is in a conical shape, the cylindrical tube (304) fixed at the end of the endoscope tube (301) is located at the end of the transparent cap (201) close to the endoscope tube (301); when the transparent cap (201) is in a cylindrical shape, the cylindrical tube (304) fixed at the end of the endoscope tube (301) is located close to the observation port (203).

6. The multifunctional transparent cap for painless gastroenteroscope according to claim 2, characterized in that: When the transparent cap (201) is in a conical shape, the sliding block (307) is placed close to the end of the endoscope tube (301); when the transparent cap (201) is in a cylindrical shape, the sliding block (307) is placed away from the end of the endoscope tube (301).

7. The multifunctional transparent cap for painless gastroenteroscope according to claim 2, characterized in that: When the transparent cap (201) is in a conical shape, the side hole (202) and the observation port (203) are in an undeformed state; when the transparent cap (201) is in a cylindrical shape, the side hole (202) and the observation port (203) are in a deformed state.

8. The multifunctional transparent cap for painless gastroenteroscope according to claim 2, characterized in that: When the side hole (202) is not deformed, the smaller portion of the adjustment opening (305) is mutually compatible with the undeformed side hole (202); when the side hole (202) is deformed, the larger portion of the adjustment opening (305) is mutually compatible with the deformed side hole (202).

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