A gastroscopy auxiliary device for gastroenterology

Abstract

This invention belongs to the field of medical device technology, specifically disclosing an auxiliary device for gastroscopy in gastroenterology. It includes a tray with a cushion, an insertion tube clamping mechanism located on the tray away from the cushion, a forehead fixation mechanism and a posterior skull fixation mechanism located on the tray on the front and back sides of the cushion, a clamping forceps located on the lower side of the tray away from the cushion, and a connecting rod at the front end of the tray. The insertion tube clamping mechanism includes side grooves symmetrically located on both edges of the tray, positioning drive shafts rotatably located within the two side grooves, and two L-shaped swing arms whose lower ends are respectively connected to the two positioning drive shafts. This invention innovatively employs a foot pedal control system, transferring the axial movement control of the insertion tube from the hand to the foot. It also utilizes a specially designed clamping and assisting mechanism, allowing physicians to conveniently and securely insert the insertion tube into the auxiliary mechanism using only one hand, achieving a fully automated single-person process from preoperative installation to intraoperative operation.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically referring to an auxiliary device for gastroscopy in gastroenterology. Background Technology

[0002] Electronic gastroscopy is an indispensable key device in modern medicine for the diagnosis and treatment of upper gastrointestinal diseases. It uses a flexible insertion tube integrating an optical imaging system and instrument channels, inserted through the patient's mouth into the esophagus, stomach, and duodenum, allowing the operator to directly observe lesions on the mucosal surface, such as inflammation, ulcers, polyps, and early tumors. It boasts advantages such as high diagnostic accuracy and the ability to simultaneously perform biopsies or minimally invasive treatments.

[0003] In routine gastroscopy procedures, patients typically assume a left lateral decubitus position with a bite block in their mouth to prevent biting the endoscope. The physician holds the endoscope's operating section with one hand, adjusting the curvature of the endoscope's tip using knobs or handles, while the other hand supports and guides the insertion tube, allowing the endoscope to move forward and backward within the digestive tract. During the examination, if suspicious lesions are found, biopsy forceps or other accessories are often inserted through the instrument channel on the operating section to collect tissue samples for pathological analysis. However, after long-term clinical practice, the above-mentioned traditional gastroscopy procedure has the following technical shortcomings:

[0004] First, the method of directly inserting the tube by hand relies on the physician's personal stability, making it difficult to guarantee an absolutely smooth delivery process. Slight shaking may occur during delivery, which not only increases the patient's discomfort such as nausea and vomiting, but may also affect the effectiveness of dynamic observation and precise positioning.

[0005] Secondly, in this traditional operating mode, the physician's hands are completely occupied by the operating section and the insertion tube. This makes it impossible for the physician to independently complete tasks requiring a third operation, especially during biopsy sampling. In such cases, an assistant must be relied upon to operate the biopsy forceps inserted through the instrument channel, performing actions such as opening, closing, pushing, and pulling. This two-person collaborative operating mode demands a very high degree of understanding and precision in cooperation between the physician and assistant, which inherently increases the complexity and potential risks of the operation. Existing technologies have developed some auxiliary propulsion devices designed to free up the physician's hand. These devices typically use clamping or transmission mechanisms to fix the insertion tube and allow the physician to control the device to automatically advance or retreat the insertion tube. However, in actual clinical applications, when guiding the scope to the lesion, the physician not only needs to control the end angle through the operating section but also needs to frequently and finely adjust the depth of advance and retreat of the insertion tube to obtain the optimal field of view and sampling position. This means that the hand "freed" is actually occupied by the task of controlling the auxiliary propulsion device, meaning that the technical difficulties encountered in performing accurate biopsies independently remain unresolved. Summary of the Invention

[0006] To address the above issues, this invention provides an auxiliary device for gastroscopy in gastroenterology. It innovatively employs a foot-operated control system, transferring the axial movement control of the insertion tube from the hand to the foot. A specially designed clamping and assisting mechanism allows physicians to conveniently and securely insert the insertion tube into the auxiliary mechanism using only one hand. This achieves a fully automated process from pre-operative installation to intraoperative operation, completely freeing up one of the physician's hands and enabling them to independently complete complex tasks such as biopsies, significantly improving the continuity and accuracy of the procedure.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes an auxiliary device for gastroscopy examination in gastroenterology, including a tray, a pillow pad on the tray, an insertion tube clamping mechanism disposed on the tray and away from the pillow pad, a forehead fixation mechanism and a posterior skull fixation mechanism disposed on the tray and located on the front and back sides of the pillow pad, a clamping forceps disposed on the lower side of the tray and away from the pillow pad, and a connecting rod disposed at the front end of the tray, wherein a foot switch is provided at the lower end of the connecting rod.

[0008] Furthermore, the insertion tube clamping mechanism includes side grooves symmetrically arranged on both edges of the tray, positioning drive shafts rotatably arranged in the two side grooves respectively, and two L-shaped swing arms whose lower ends are respectively connected to the two positioning drive shafts. The upper end of the L-shaped swing arm is rotatably provided with a clamping guide wheel.

[0009] Furthermore, it also includes a synchronous opening and closing force-saving mechanism located inside the tray. This mechanism is used to link the two L-shaped swing arms to open and close synchronously, allowing doctors to easily complete the clamping action with one hand, greatly improving the convenience of preoperative preparation.

[0010] Furthermore, it also includes a drive mechanism located inside the pallet, which is connected to two positioning drive shafts.

[0011] Furthermore, it also includes an insertion tube guide mechanism respectively located inside the two L-shaped swing arms. The insertion tube guide mechanism is connected to the positioning drive shaft and is used to drive the clamping guide wheel to rotate under the drive of the drive mechanism.

[0012] Furthermore, the synchronous opening and closing force-saving mechanism includes a first placement cavity connecting two side grooves and near the bottom of the tray. A horizontal rod is provided in the first placement cavity. A sliding column extending upward is symmetrically fixed on the upper side of the horizontal rod. A sliding hole for vertical sliding of the sliding column is opened on the top of the tray. A compression spring is provided in the sliding hole to abut against the sliding column and the top of the tray. Horizontal slide tracks are symmetrically opened at both ends of the horizontal rod. A rotating rod is provided on the lower side of the lower end of the L-shaped swing arm. A roller is provided on the rotating rod and the roller is slidably fitted in the slide track.

[0013] Furthermore, the drive mechanism includes a second placement cavity located inside the tray and a servo motor fixed inside the second placement cavity. Two positioning drive shafts pass through the tray and enter the second placement cavity. One of the positioning drive shafts is coaxially connected to the output end of the servo motor. A third sprocket is coaxially fixed on each of the two positioning drive shafts, and the two third sprockets are connected by a third chain drive.

[0014] Furthermore, the insertion tube guiding mechanism includes a first rotating shaft rotatably disposed at the corner of the L-shaped swing arm and a second rotating shaft perpendicularly adjacent to the first rotating shaft. A first sprocket is coaxially fixed on the positioning drive shaft. Another first sprocket and a second bevel gear are coaxially fixed on the first rotating shaft. The two first sprockets are connected by a first chain drive. A first bevel gear and a second sprocket are coaxially fixed on the second rotating shaft. The first bevel gear and the second bevel gear are perpendicularly meshed. Another second sprocket is coaxially fixed on the clamping guide wheel. The two second sprockets are connected by a second chain drive.

[0015] Furthermore, in the two L-shaped swing arms arranged opposite to each other, the meshing positions of the first bevel gear and the second bevel gear are arranged in opposite directions, so that the rotation directions of the two clamping guide wheels are opposite.

[0016] Furthermore, the posterior head fixation mechanism includes a first spiral propulsion assembly disposed on the support plate and a posterior head pad connected to the output end of the first spiral propulsion assembly; the forehead fixation mechanism includes a second spiral propulsion assembly disposed on the support plate and a forehead pad connected to the output end of the second spiral propulsion assembly. By fixing the head in both front and rear directions, it can suppress unconscious shaking that may occur during the examination to the greatest extent, providing a basic guarantee for the stability of the endoscopic operation.

[0017] Furthermore, the L-shaped swing arm has a hollow structure; when the two L-shaped swing arms are closed and docked, their ends together form a through hole for the insertion tube to pass through, and a set of latches is provided at the top of the two L-shaped swing arms to achieve docking and locking.

[0018] Furthermore, the foot switch is electrically connected to the servo motor and is used to control the forward and reverse rotation of the servo motor.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows:

[0020] (1) By setting up the cooperation between the insertion tube clamping mechanism and the drive mechanism, the present invention solves the problem of poor stability caused by physiological tremors when the insertion tube is delivered by hand in the traditional way. Specifically, the servo motor in the drive mechanism provides stable and precisely controllable power. This power is transmitted to the clamping guide wheel of the insertion tube clamping mechanism through the insertion tube guiding mechanism. The insertion tube is driven by pure mechanical transmission to achieve smooth and uniform axial advance and retreat. Its stability exceeds that of human power, thereby effectively reducing the patient's discomfort and significantly improving the accuracy of dynamic observation and precise positioning.

[0021] (2) The present invention innovatively adopts a foot switch to control the advance and retreat of the insertion tube, and combined with the design of a synchronous opening and closing force-saving mechanism, realizes the entire process of single-person operation from preoperative installation to intraoperative operation. The foot switch completely transfers the control of the advance and retreat of the insertion tube from the hand to the foot, completely freeing up one of the doctor's hands; at the same time, the synchronous opening and closing force-saving mechanism uses the lever and spring reset principle to enable the doctor to conveniently open and close the L-shaped swing arm to clamp the insertion tube with only one hand. This design solves the technical problem in the prior art that the doctor's two hands are occupied, or the freed hand still needs to control the auxiliary device and cannot independently complete complex operations such as biopsy, greatly improving the continuity and efficiency of the operation.

[0022] (3) The present invention constructs a double-stable reference system on the reference plate by combining the posterior head fixation mechanism, the frontal head fixation mechanism and the insertion tube clamping mechanism. This effectively avoids the impact of external disturbances on the end of the endoscope inside the digestive tract. The posterior head fixation mechanism and the frontal head fixation mechanism stabilize the patient's head relative to the plate, while the insertion tube clamping mechanism stabilizes the insertion tube near the mouth relative to the same plate. This double locking of relative positions ensures that unconscious micro-movements of the patient's head or accidental external contact with the insertion tube will not be transmitted to the end of the endoscope inside the digestive tract, thereby minimizing the risk of accidental damage to the digestive tract mucosa due to relative displacement. Attached Figure Description

[0023] Figure 1 This is a first three-dimensional structural diagram of an auxiliary device for gastroscopy in gastroenterology proposed in this invention.

[0024] Figure 2 This is a side view of an auxiliary device for gastroscopy in gastroenterology proposed in this invention.

[0025] Figure 3 This is a schematic diagram of the second three-dimensional structure of an auxiliary device for gastroscopy in gastroenterology proposed in this invention.

[0026] Figure 4 This is a schematic diagram showing the structural relationship between the L-shaped swing arm and the side groove of an auxiliary device for gastroscopy in gastroenterology proposed in this invention.

[0027] Figure 5 for Figure 3 Enlarged view of section A in the middle.

[0028] Figure 6 This is a schematic diagram of the drive mechanism of a gastroscopy auxiliary device for gastroenterology proposed in this invention.

[0029] Figure 7 This is a schematic diagram showing the relationship between the synchronous opening and closing force-saving mechanism and the position of the tray in a gastroscopy auxiliary device for gastroenterology proposed in this invention.

[0030] Figure 8 for Figure 7 Enlarged view of section B.

[0031] Figure 9 This is a schematic diagram of the insertion tube guiding mechanism on one side of a gastroscopy auxiliary device for gastroenterology proposed in this invention.

[0032] Figure 10 This is a schematic diagram of the insertion tube guiding mechanism on the other side of a gastroscopy auxiliary device for gastroenterology proposed in this invention.

[0033] Among them, 1. support plate, 11. cushion, 12. clamping clamp, 2. insertion tube clamping mechanism, 21. side groove, 22. positioning drive shaft, 23. L-shaped swing arm, 24. through hole, 25. clamping guide wheel, 26. lock, 3. synchronous opening and closing force-saving mechanism, 31. first placement cavity, 32. horizontal bar, 33. sliding column, 34. sliding hole, 35. compression spring, 36. slide rail, 37. rotating rod, 38. roller, 4. insertion tube guiding mechanism, 41. first sprocket, 42. first chain 43. First rotating shaft; 431. Second rotating shaft; 44. Second bevel gear; 45. First bevel gear; 46. Second chain; 47. Second sprocket; 5. Drive mechanism; 51. Second placement cavity; 52. Servo motor; 53. Third sprocket; 54. Third chain; 6. Connecting rod; 61. Foot switch; 7. Back skull fixing mechanism; 71. First spiral propulsion assembly; 72. Back skull pad; 8. Forehead fixing mechanism; 81. Second spiral propulsion assembly; 82. Forehead pad.

[0034] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, this invention proposes an auxiliary device for gastroscopy in gastroenterology, including a support plate 1 as a basic support structure. The support plate 1 is provided with a pillow 11 for the patient's head to lie on. In order to ensure the absolute stability of the patient's head during the examination, a forehead fixation mechanism 8 and a posterior head fixation mechanism 7 are respectively provided on the front and back sides of the pillow 11 on the support plate 1. Specifically, the posterior head fixation mechanism 7 includes a first spiral propulsion component 71 provided on the support plate 1 and a posterior head pad 72 connected to the output end of the component; the forehead fixation mechanism 8 includes a second spiral propulsion component 81 provided on the support plate 1 and a forehead pad 82 connected to the output end of the component. By manually turning the two spiral propulsion components, the posterior head pad 72 and the forehead pad 82 can be gently pressed against the back of the patient's head and forehead, respectively, thereby achieving stable fixation of the head.

[0038] In order to secure the entire device to the side of the examination bed, a clamping clamp 12 is provided on the underside of the tray 1, which is located away from the pillow 11, so as to be clamped on the side panel of the bed. At the front end of the tray 1, that is, the end away from the pillow 11, a connecting rod 6 is provided. The lower end of the connecting rod 6 extends to the vicinity of the ground and is equipped with a foot switch 61.

[0039] The core component of this invention is the insertion tube clamping mechanism 2 mounted on the tray 1. This mechanism includes side grooves 21 symmetrically opened along the two edges of the tray 1. A positioning drive shaft 22 is rotatably mounted in each side groove 21. The lower ends of two L-shaped swing arms 23 are respectively connected to the two positioning drive shafts 22, so that the L-shaped swing arms 23 can swing open and close around the axis of the positioning drive shaft 22. Each L-shaped swing arm 23 is a hollow structure to accommodate the internal transmission mechanism. Inside the upper end of the L-shaped swing arm 23, a clamping guide wheel 25 is rotatably mounted. When the two L-shaped swing arms 23 are closed and connected, their ends together form a through hole 24 for the gastroscopy insertion tube to pass through, and the two clamping guide wheels 25 can just clamp the insertion tube. In order to ensure stability in the closed state, a set of interlocking latches 26 are provided on the top of the two L-shaped swing arms 23.

[0040] To achieve synchronous opening and closing of the two L-shaped swing arms 23 and provide convenience for the operator, the present invention also provides a synchronous opening and closing force-saving mechanism 3. This mechanism is located inside the tray 1 and includes a first placement cavity 31 that connects the two side grooves 21 and is close to the bottom of the tray 1. A horizontal rod 32 is horizontally arranged in the first placement cavity 31. Two upwardly extending sliding columns 33 are symmetrically fixed on the upper side of the horizontal rod 32. The top of the tray 1 is correspondingly provided with sliding holes 34 for the sliding columns 33 to slide vertically. Each sliding hole 34 is provided with a compression spring 35. The compression spring 35 abuts against the top of the sliding column 33 and the inner wall of the top of the tray 1, providing downward pressure in the natural state. Horizontal slide rails 36 are symmetrically opened at both ends of the horizontal rod 32. Correspondingly, a rotating rod 37 is provided on the lower side of the lower end of each L-shaped swing arm 23. A roller 38 is provided on the rotating rod 37. The roller 38 slides in the slide rail 36.

[0041] The axial movement of the endoscope insertion tube is jointly accomplished by the drive mechanism 5 and the insertion tube guide mechanism 4. The drive mechanism 5 is located in the second placement cavity 51 inside the tray 1 and includes a servo motor 52 fixed in the cavity. Two positioning drive shafts 22 pass through the tray 1 and enter the second placement cavity 51. One of the positioning drive shafts 22 is coaxially connected to the output end of the servo motor 52. In order to ensure the synchronous rotation of the two positioning drive shafts 22, a third sprocket 53 is coaxially fixed on each of the two positioning drive shafts 22. The two third sprockets 53 are connected by a third chain 54.

[0042] The insertion tube guide mechanism 4 is respectively located inside two hollow L-shaped swing arms 23. Inside one L-shaped swing arm 23, a first sprocket 41 is coaxially fixed on the positioning drive shaft 22. At the corner of the L-shaped swing arm 23, a first rotating shaft 43 is rotatably provided. Another first sprocket 41 and a second bevel gear 44 are coaxially fixed on the first rotating shaft 43. The two first sprockets 41 are connected by a first chain 42. At a position perpendicular to and adjacent to the first rotating shaft 43, a second rotating shaft 431 is rotatably provided. A first bevel gear 45 and a second sprocket 47 are coaxially fixed on the second rotating shaft 431. The first bevel gear 45 and the second bevel gear 44 are perpendicularly meshed, realizing a 90-degree change in the transmission direction. Another second sprocket is coaxially fixed on the clamping guide wheel 25. 47. The two second sprockets 47 are connected by a second chain 46. In this way, the power of the servo motor 52 is transmitted to the clamping guide wheel 25 through a series of sprocket and bevel gear drives in the drive mechanism 5 and the insertion tube guide mechanism 4, driving it to rotate. Crucially, in the two L-shaped swing arms 23 arranged oppositely, the meshing positions of the first bevel gear 45 and the second bevel gear 44 inside are set in opposite directions. This ensures that when the servo motor 52 is driven, the rotation directions of the two clamping guide wheels 25 are opposite (one clockwise and one counterclockwise), so as to generate effective clamping and axial pushing or pulling force on the insertion tube. The foot switch 61 is electrically connected to the servo motor 52, and the two buttons on it are used to control the forward and reverse rotation of the servo motor 52, respectively.

[0043] The specific work process is as follows:

[0044] First, place the device next to the examination bed with the patient in a left lateral decubitus position. Secure the tray 1 to the bed board with clamps 12. The patient's head lies on the pillow pad 11 of the tray 1. The physician then manually operates the first spiral propulsion assembly 71 and the second spiral propulsion assembly 81 to press the posterior head pad 72 and the forehead pad 82 against the back of the patient's head and forehead respectively, thus reliably fixing the head.

[0045] After placing a mouthpiece in the patient's mouth, the physician holds the operating part of the gastroscope with their left hand and guides the insertion tube through the mouthpiece into the patient's oral cavity with their right hand. The physician then temporarily guides the insertion tube with their left hand and uses their right hand to move one of the L-shaped swing arms 23 outwards. Due to the action of the synchronous opening and closing force-saving mechanism 3, in the initial closed state, the compression spring 35 is in its natural state, pressing the horizontal rod 32 to the bottom. When the physician moves one of the L-shaped swing arms 23, the lower end of the rotating rod 37 and roller 38 rotate around the positioning drive shaft 22 and slide within the slide rail 36, thereby lifting the horizontal rod 32. Under the constraint of the sliding column 33 and the sliding hole 34, it overcomes the elastic force of the compression spring 35 and moves vertically upwards. The upward movement of the horizontal bar 32 will drive the other L-shaped swing arm 23 to make a completely symmetrical opening action through the slide 36, roller 38 and rotating rod 37 at the other end. After the two L-shaped swing arms 23 are opened, the doctor guides the insertion tube between the two clamping guide wheels 25 with his left hand, and then slowly resets the L-shaped swing arm 23 with his right hand. Under the reset force of the compression spring 35, the horizontal bar 32 moves down, driving the two L-shaped swing arms 23 to close synchronously until the two clamping guide wheels 25 just clamp the insertion tube. At the same time, the two L-shaped swing arms 23 are completely closed and connected. At this time, the top lock 26 is fastened, and the insertion tube is securely installed on the device and passes through the through hole 24.

[0046] After installation, the physician's left hand focuses on manipulating the endoscope's operating section to adjust the end angle, while the foot presses one of the two switches on the foot pedal 61 to control the forward or reverse rotation of the servo motor 52. The power of the servo motor 52 drives the two clamping guide wheels 25 to rotate in opposite directions through the drive mechanism 5 and the insertion tube guide mechanism 4, thus smoothly and accurately advancing or retracting the insertion tube. When a lesion is found during the examination that requires a biopsy, the physician's right hand is completely freed. The physician can independently insert the biopsy forceps through the instrument channel and use the right hand to perform fine operations such as opening and closing the biopsy forceps and sampling. At the same time, the left hand and foot continue to work together to finely adjust the position and depth of the endoscope, thus realizing a fully automated and precise operation by a single person, greatly improving examination efficiency and safety.

[0047] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0049] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A kind of gastroenterology gastroscopy auxiliary device, including supporting plate (1), pillow (11) is equipped on the supporting plate (1), it is characterized in that: The utility model also includes an insertion tube clamping mechanism (2) arranged on the supporting plate (1) and away from the pillow (11), a forehead fixing mechanism (8) and a rear skull fixing mechanism (7) arranged on the supporting plate (1) on the front and back sides of the pillow (11), a clamping forceps (12) arranged on the lower side of the supporting plate (1) and away from the pillow (11), and a connecting rod (6) arranged at the front end of the supporting plate (1), wherein the lower end of the connecting rod (6) is provided with a foot switch (61); The insertion tube clamping mechanism (2) comprises edge grooves (21) symmetrically arranged on the two edges of the supporting plate (1), positioning drive shafts (22) rotatably arranged in the two edge grooves (21) respectively, and two L-shaped swing arms (23) with lower ends rotatably connected to the two positioning drive shafts (22) respectively, and the L-shaped swing arms (23) are internally provided with clamping guide wheels (25) rotatably arranged at the upper ends thereof; The utility model also includes a synchronous opening and closing labor-saving mechanism (3) arranged in the supporting plate (1), which is used for synchronously opening and closing the two L-shaped swing arms (23); The utility model also includes a drive mechanism (5) arranged in the supporting plate (1), which is in transmission connection with the two positioning drive shafts (22); The utility model also includes insertion tube guide mechanisms (4) arranged in the two L-shaped swing arms (23) respectively, which are in transmission connection with the positioning drive shafts (22) and are used for driving the clamping guide wheels (25) to rotate under the driving of the drive mechanism (5); The insertion tube guide mechanism (4) comprises a first rotating shaft (43) rotatably arranged at the corner of the L-shaped swing arm (23) and a second rotating shaft (431) vertically and adjacently arranged with the first rotating shaft (43), the positioning drive shaft (22) is coaxially fixed with a first sprocket (41), the first rotating shaft (43) is coaxially fixed with another first sprocket (41) and a second bevel gear (44), the two first sprockets (41) are in transmission connection through a first chain (42), the second rotating shaft (431) is coaxially fixed with a first bevel gear (45) and a second sprocket (47), the first bevel gear (45) is in vertical meshing connection with the second bevel gear (44), the clamping guide wheel (25) is coaxially fixed with another second sprocket (47), and the two second sprockets (47) are in transmission connection through a second chain (46); In the two oppositely arranged L-shaped swing arms (23), the meshing position relationship between the first bevel gear (45) and the second bevel gear (44) is reversely arranged, so that the rotating directions of the two clamping guide wheels (25) are opposite, thereby being able to generate effective axial pushing force and pulling force on the insertion tube; The drive mechanism (5) comprises a second placing cavity (51) arranged in the supporting plate (1) and a servo motor (52) fixed in the second placing cavity (51), the foot switch (61) is in electrical connection with the servo motor (52) and is used for controlling the forward rotation and reverse rotation of the servo motor (52).

2. The auxiliary device for gastroenterology examination according to claim 1, characterized in that: The synchronous opening and closing power saving mechanism (3) comprises a first placing cavity (31) communicated with two side grooves (21) and close to the bottom of the supporting plate (1), a horizontal rod (32) is arranged in the first placing cavity (31), upward extending slide columns (33) are symmetrically fixed on the upper side of the horizontal rod (32), a slide hole (34) is arranged on the top of the supporting plate (1) and used for vertical sliding of the slide column (33), a compression spring (35) is arranged in the slide hole (34) and abuts between the slide column (33) and the top of the supporting plate (1), horizontal slide grooves (36) are symmetrically arranged at the two ends of the horizontal rod (32), a rotating rod (37) is arranged at the lower side of the lower end of the L-shaped swing arm (23), a roller (38) is arranged on the rotating rod (37) and is slidingly arranged in the slide groove (36).

3. The device according to claim 2, wherein: Two positioning driving shafts (22) pass through the supporting plate (1) and enter the second placing cavity (51), one of the two positioning driving shafts (22) is coaxially connected with the output end of the servo motor (52), third chain wheels (53) are coaxially fixed on the two positioning driving shafts (22) respectively, and the two third chain wheels (53) are drivingly connected through a third chain (54).

4. The device according to claim 3, wherein: The rear skull fixing mechanism (7) comprises a first screw propulsion assembly (71) arranged on the supporting plate (1) and a rear skull pad (72) connected with the output end of the first screw propulsion assembly (71); the forehead fixing mechanism (8) comprises a second screw propulsion assembly (81) arranged on the supporting plate (1) and a forehead pad (82) connected with the output end of the second screw propulsion assembly (81).

5. The device according to claim 4, wherein: The L-shaped swing arm (23) is a hollow structure; when the two L-shaped swing arms (23) are closed and butt-jointed, the end portions thereof jointly surround a through hole (24) for inserting a pipe, and a group of lock buckles (26) are arranged at the top of the two L-shaped swing arms (23) to realize butt-joint locking.

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