Laryngoscope based on gear rack drive

Abstract

The present invention discloses a laryngoscope based on a gear rack transmission, comprising a handle (1) and an inner tube (3), wherein the bottom of the handle (1) is fixedly connected to an inner tube accommodating portion (2), a partition (4) is arranged inside the handle (1), a movable plate (5) and a movable plate driving mechanism are arranged on the partition (4), one end of the inner tube (3) is fixedly connected to the movable plate (5), the other end of the inner tube (3) is slidably connected to the inner tube accommodating portion (2), and the movable plate driving mechanism is used to drive the movable plate (5) to move on the partition (4); a controller (33) is also arranged inside the handle (1), and the movable plate driving mechanism is electrically connected to the controller (33). The present invention can adopt a conventional motor and is applicable to various laryngoscopes, has a wide range of applications, and has a low manufacturing cost.

Description

Technical Field

[0001] The invention relates to a laryngoscope, in particular to a laryngoscope based on gear rack transmission. Background Art

[0002] The technology of modern video laryngoscopes has developed rapidly, and fixed-lens laryngoscopes have gradually failed to meet the needs of difficult intubation. The micro-motor that electrically controls the extension and retraction of the adjustable laryngoscope lens is placed inside the laryngoscope tube. Due to the limited volume of the laryngoscope tube, although placing the micro-motor inside the laryngoscope tube is a feasible solution, it requires non-standard customization of the micro-motor, which takes a long time and is costly, and is still difficult to produce.

[0003] In order to solve the problem that the micro motor needs to be customized in a non-standard way, some laryngoscopes are set up as curved mirror tubes, the motor is set in the handle of the laryngoscope, and a screw structure is set in the handle. The screw structure is used to drive the inner tube of the laryngoscope to achieve telescopic adjustment of the camera. However, it is found that there is a certain amount of noise during operation, which is determined by the screw transmission structure itself and is difficult to eliminate. Therefore, it is very important to invent a curved laryngoscope with stable transmission and good mute effect.

[0004] In addition, in actual operation, even if the glottis is exposed through the above-mentioned retractable laryngoscope, the doctor still needs to hold the video laryngoscope with one hand and the catheter containing the guide wire with the other hand for intubation. At this time, an assistant is also needed to help remove the guide wire. When intubation is difficult, due to the limited space in the laryngopharynx, intubation takes a long time, and repeated intubation will affect the patient's life safety. There is still no good solution. Summary of the invention

[0005] The purpose of the present invention is to provide a laryngoscope based on gear rack transmission to solve the technical problems in the prior art that the motor needs to be customized and there is noise during operation.

[0006] The present invention provides a laryngoscope based on gear rack transmission, comprising a handle and an inner tube, the bottom of the handle being fixedly connected to an inner tube accommodating portion, a partition being arranged inside the handle, a movable plate and a movable plate driving mechanism being arranged on the partition, one end of the inner tube being fixedly connected to the movable plate, the other end of the inner tube being slidably connected to the inner tube accommodating portion, the movable plate driving mechanism being used to drive the movable plate to move on the partition; a controller is also arranged inside the handle, and the movable plate driving mechanism is electrically connected to the controller.

[0007] In the aforementioned laryngoscope based on gear rack transmission, preferably, a rotating shaft is rotatably mounted on the handle, and one end of the rotating shaft is fixedly connected to the display screen; two parallel and oppositely arranged limit plates are fixedly provided on one side of the partition, and the two limit plates are arranged along the length direction of the handle, and the movable plate is located between the two limit plates.

[0008] In the aforementioned laryngoscope based on gear rack transmission, preferably, a gear avoidance hole extending along the length direction of the movable plate is opened in the middle part, a rack is fixedly provided on one side of the gear avoidance hole, and the movable plate driving mechanism includes a first driving motor and a driving gear, the first driving motor is fixedly mounted on the partition, the first driving motor and the movable plate are located on opposite sides of the partition, the output shaft of the first driving motor passes through the partition and is fixedly connected to the driving gear, and the driving gear is located in the gear avoidance hole and meshes with the rack.

[0009] In the aforementioned laryngoscope based on gear rack transmission, preferably, two elongated holes are also provided on the movable plate, and the two elongated holes are symmetrically arranged relative to the gear avoidance hole. Two guide columns are respectively passed through the two elongated holes and are threadedly connected to the partition, and end caps are fixedly provided at the ends of the guide columns, and the diameter of the end caps is larger than the width of the elongated holes; a connecting ring is fixedly provided at one end of the movable plate, and one end of the inner tube is plug-connected to the connecting ring and fixed with screws.

[0010] In the aforementioned laryngoscope based on gear rack transmission, preferably, a mounting frame is provided on the side wall of the movable plate, a second driving motor is fixed on the mounting frame, a winding wheel is fixed on the output shaft of the second driving motor, the end of the inner tube is connected to the first camera through a snake tube, and two wires of the snake tube are wound around the winding wheel.

[0011] In the aforementioned laryngoscope based on gear rack transmission, preferably, a second camera is fixedly provided in the inner tube accommodating portion.

[0012] In the aforementioned laryngoscope based on gear rack transmission, preferably, the inner tube accommodating portion is composed of a bottom plate, a side plate and a top plate, one side of the bottom plate is fixedly connected to the lower end of the side plate, one side of the top plate is fixedly connected to the upper end of the side plate, and the width of the top plate is smaller than the width of the bottom plate.

[0013] The aforementioned laryngoscope based on gear rack transmission preferably also includes a tongue depressor assembly, which includes a fixed portion and a tongue depressor plate, the tongue depressor plate is fixedly connected to the fixed portion, a clamping plate is formed on the fixed portion, and the fixed portion is clamped and fixed to the inner tube accommodating portion by the clamping plate.

[0014] The aforementioned laryngoscope based on rack and pinion transmission preferably also includes an AI control module, which includes a central processing unit and a memory, and the memory is electrically connected to the central processing unit; a radar visual recognition sensor and a pressure sensor are also provided at the end of the snake tube, and the radar visual recognition sensor and the pressure sensor are both electrically connected to the controller.

[0015] In the aforementioned laryngoscope based on gear rack transmission, preferably, the central processing unit is connected to the controller via a wireless communication module.

[0016] Compared with the prior art, the present invention includes a handle, an inner tube accommodating portion and an inner tube, the bottom of the handle is fixedly connected to the inner tube accommodating portion, a partition is arranged in the handle, a movable plate and a movable plate driving mechanism are arranged on the partition, one end of the inner tube is fixedly connected to the movable plate, the other end of the inner tube is slidably connected to the inner tube accommodating portion, and the movable plate driving mechanism is used to drive the movable plate to move on the partition; a controller is also arranged in the handle, and the movable plate driving mechanism is electrically connected to the controller. The present invention arranges the movable plate and the movable plate driving mechanism in the handle, and since there is sufficient space in the handle, a conventional motor can be used without separate customization, which solves the problem of high cost of separate customization of motors in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an axonometric view of an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure after the handle and the inner tube receiving part are cut open;

[0019] Figure 3 It is an axonometric view of the moving plate and the driving mechanism of the moving plate;

[0020] Figure 4 yes Figure 3 Exploded diagram of

[0021] Figure 5 It is the structural block diagram of the controller and AI control module;

[0022] Figure 6 is a layout diagram of the first camera, the visual recognition sensor, and the pressure sensor;

[0023] Figure 7 is an axonometric view of another embodiment of the present invention;

[0024] Figure 8 yes Figure 7 An axonometric view of the inner tube receiving portion and the tongue depressing assembly in FIG.

[0025] Fig. 9 It is a schematic diagram of the waterproof structure of the inner tube.

[0026] Explanation of the reference numerals: handle 1, inner tube accommodating portion 2, inner tube 3, partition 4, movable plate 5, rotating shaft 6, display screen 7, limit plate 8, gear avoidance hole 9, rack 10, first drive motor 11, drive gear 12, long hole 13, guide column 14, end cap 15, connecting ring 16, mounting frame 17, second drive motor 18, winding wheel 19, snake tube 20, first camera 21, second camera 22, bottom plate 23, side plate 24, top plate 25, fixing portion 26, tongue depressor 27, card plate 28, PCB printed circuit board 29, control button 30, central processing unit 31, memory 32, controller 33, radar visual recognition sensor 34, pressure sensor 35, baffle 36, bellows 37. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0028] Embodiment 1 of the present invention: Figure 1-Figure 5 As shown, a laryngoscope based on gear rack transmission includes a handle 1 and an inner tube 3, the bottom of the handle 1 is fixedly connected to the inner tube accommodating portion 2, a partition 4 is arranged in the handle 1, a movable plate 5 and a movable plate driving mechanism are arranged on the partition 4, one end of the inner tube 3 is fixedly connected to the lower end of the movable plate 5, and the other end of the inner tube 3 is slidably connected to the inner tube accommodating portion 2, and the movable plate driving mechanism is used to drive the movable plate 5 to move on the partition 4; a controller 33 is also arranged in the handle 1, and the movable plate driving mechanism is electrically connected to the controller 33.

[0029] In this embodiment, the inner tube accommodating portion 2 is a round tube or a square tube, and the inner tube accommodating portion 2 can be either a straight tube or an arc tube. A PCB printed circuit board 29 is fixedly installed in the handle 1, and a controller 33 is arranged on the PCB printed circuit board 29. A plurality of control buttons 30 are also arranged on the PCB printed circuit board 29, and the control buttons 30 at least include an extension button, a contraction button, an upturn button, a power button and a downturn button. A evasion hole for avoiding the control button 30 is provided on the handle 1, so that the control button 30 can extend out of the handle 1, which is convenient for the user to operate. The extension button, the contraction button, the upturn button, the power button and the downturn button are all electrically connected to the controller 33. It should be noted that the control button 30 in this embodiment adopts a mechanical button, and the control button 30 can also adopt a touch button according to the needs. Both mechanical buttons and touch buttons are prior art and can be obtained by purchase.

[0030] A rotating shaft 6 is rotatably mounted on the handle 1, and one end of the rotating shaft 6 is fixedly connected to a display screen 7. The display screen 7 is electrically connected to the controller 33, and the display screen 7 is used to display images.

[0031] Furthermore, two parallel and opposite limiting plates 8 are fixedly provided on one side of the partition plate 4 . The two limiting plates 8 are arranged along the length direction of the handle 1 , and the movable plate 5 is located between the two limiting plates 8 .

[0032] The two sides of the moving plate 5 are slidably connected to the two limiting plates 8, which are used to limit the moving direction of the moving plate 5 so that the moving plate 5 can only move along the length direction of the handle 1, thereby preventing the moving plate 5 from being stuck or causing the inner tube 3 to move unsmoothly due to the skewness of the moving plate 5.

[0033] Furthermore, a gear avoidance hole 9 extending along the length direction of the movable plate 5 is opened in the middle part, and a rack 10 is fixedly provided on one side of the gear avoidance hole 9. The movable plate driving mechanism includes a first driving motor 11 and a driving gear 12. The first driving motor 11 is fixedly provided on the partition 4. The first driving motor 11 and the movable plate 5 are located on the opposite side of the partition 4. The output shaft of the first driving motor 11 passes through the partition 4 and is fixedly connected with the driving gear 12. The driving gear 12 is located in the gear avoidance hole 9 and the driving gear 12 is meshed with the rack 10.

[0034] The gear avoidance hole 9 is parallel to the two limit plates 8. The first drive motor 11 is electrically connected to the controller 33. When the first drive motor 11 is working, the drive gear 12 rotates, and the drive gear 12 cooperates with the rack 10 to move the rack 10, thereby driving the movable plate 5 to move. The movement of the movable plate 5 drives the inner tube 3 to move.

[0035] Furthermore, two elongated holes 13 are provided on the movable plate 5, and the two elongated holes 13 are symmetrically arranged relative to the gear avoidance hole 9. Two guide columns 14 pass through the two elongated holes 13 respectively and are threadedly connected to the partition 4. An end cap 15 is fixedly provided at the end of the guide column 14, and the diameter of the end cap 15 is larger than the width of the elongated hole 13.

[0036] The two long holes 13 are parallel to the gear avoidance hole 9 and the limit plate 8. The setting of the guide column 14 plays a double insurance role. When one of the limit plates 8 is damaged and fails, the cooperation between the guide column 14 and the long hole 13 can still ensure that the movable plate 5 can move along the axial direction of the handle 1 without being skewed. The setting of the end cap 15 can limit the freedom of the movable plate 5 in the axial direction of the guide column 14, thereby preventing the movable plate 5 from being separated from the driving gear 12.

[0037] Furthermore, a connecting ring 16 is fixedly arranged at one end of the moving plate 5 close to the inner tube 3, and one end of the inner tube 3 is plug-connected with the connecting ring 16 and fixed with screws. The setting of the connecting ring 16 facilitates the disassembly and assembly of the inner tube 3 and the moving plate 5, and improves the disassembly and assembly speed.

[0038] It should be noted that there is a certain distance between the lower end of the partition 4 and the bottom end of the handle 1, and the distance is required to ensure that the connecting ring 16 will not contact the connection position between the handle 1 and the inner tube accommodating portion 2 when the inner tube 3 extends outward to the maximum length.

[0039] Furthermore, a mounting frame 17 is provided on the side wall of the movable plate 5, and a second driving motor 18 is fixed on the mounting frame 17. A winding wheel 19 is fixed on the output shaft of the second driving motor 18. The end of the inner tube 3 is connected to the first camera 21 through a snake tube 20, and two drawing wires of the snake tube 20 are wound around the winding wheel 19.

[0040] The second drive motor 18 is electrically connected to the controller 33. When the second drive motor 18 is working, the winding wheel 19 rotates, so that the two wires on the snake bone tube 20 are pulled and loosened one by one, thereby changing the angle of the snake bone tube 20, thereby improving the visual range of the first camera 21. The snake bone tube 20 is a prior art and can be directly purchased and obtained. Its specific structure is not repeated in this embodiment. It should be noted that a single wire drawing snake bone tube 20 can also be used in the present invention.

[0041] The first camera 21 is electrically connected to the controller 33 via a data line. When the first camera 21 is working, it transmits the collected image information to the controller 33 . The controller 33 processes the signal and sends it to the display screen 7 , which displays the image.

[0042] Working principle: turn on the power supply when in use. Of course, a battery can also be set in the handle 1 or in the shell of the display screen 7. The laryngoscope is turned on by pressing the power button. After turning on, a switch signal is sent to the controller 33 by operating the corresponding control button 30. The controller 33 controls the working status of the first drive motor 11, the second drive motor 18 and the first camera 21 according to the corresponding switch signal.

[0043] When the first camera 21 needs to extend outward from the inner tube accommodating portion 2, the extension button is pressed. After receiving the signal, the controller 33 controls the first drive motor 11 to rotate, and the movable plate 5 moves downward under the cooperation of the driving gear 12 and the rack 10. The movable plate 5 drives one end of the inner tube 3 to move downward through the connecting ring 16, and the inner tube 3 slides in the inner tube accommodating portion 2, and the first camera 21 extends outward; if the first camera 21 needs to be retracted, only the retraction button needs to be pressed. After receiving the signal, the controller 33 controls the first drive motor 11 to rotate in the opposite direction, and the movable plate 5 moves upward while driving the inner tube 3 upward, and the first camera 21 moves toward the inner direction of the inner tube accommodating portion 2.

[0044] When the first camera 21 is in the extended state, if you want to adjust the working angle of the first camera 21, you only need to press the up flip button or the down flip button. After receiving the corresponding signal, the controller 33 controls the second drive motor 18 to work. When the second drive motor 18 works, it drives the winding wheel 19 to rotate, so that one wire provides tension and the other wire is released. The snake tube 20 will bend, thereby changing the working angle of the first camera 21. When the first camera 21 needs to rotate in the opposite direction, the second drive motor 18 is controlled by the controller 33 to rotate in the opposite direction. At this time, the working states of the two wires are interchanged to achieve the reverse bending of the snake tube 20.

[0045] Embodiment 2 of the present invention: Based on Embodiment 1, Figure 1-6 As shown, an AI control module is also provided, and the AI ​​control module can be fixed on the outer shell of the handle 1, or can be separately provided with the handle 1.

[0046] The AI ​​control module includes a central processing unit 31 and a memory 32. The memory 32 is electrically connected to the central processing unit 31. The central processing unit 31 is connected to the controller 33 by wire or wirelessly. It should be noted that the wireless connection also requires a wireless communication module to be set on the AI ​​control module and the PCB printed circuit board 29. Figure 6 The wired connection method is shown in Figure 2.

[0047] The memory 32 stores a control program, which has learned 1000 frames of photos of the patient's epiglottis structure and glottis structure. Through the learning of the control program, the first camera 21 can automatically identify the epiglottis structure and the glottis structure.

[0048] A radar visual recognition sensor 34 and a pressure sensor 35 are also provided at the end of the snake tube 20 , and both the radar visual recognition sensor 34 and the pressure sensor 35 are electrically connected to the controller 33 .

[0049] In this embodiment, the control button 30 also includes an automatic / manual switching button. When working, the automatic / manual switching button is pressed to turn on or off the AI ​​auxiliary function. When the handheld laryngoscope is placed in the patient's oral cavity and throat, the AI ​​function button can be pressed when the lens finds the epiglottis. When the AI ​​auxiliary function is turned on, the first camera 21 collects image information and sends it to the controller 33, the radar visual recognition sensor 34 is used to collect the distance information between the epiglottis, the pharyngeal wall mucosa, and the glottis and send it to the controller 33, the pressure sensor 35 is used to collect pressure information and send it to the controller 33, and the controller 33 sends all the received information to the central processor 31 via wired or wireless means. The central processor 31 calls the control program stored in the memory 32, and according to the degree of picture matching of machine learning, all the collected data are calculated through the control program to calculate the data that needs to be adjusted for the snake bone tube 20, such as the first camera extends forward 1.5 cm and the angle is adjusted upward by 30 degrees. The central processing unit 31 sends the adjustment data to the controller 33, and the controller 33 controls the operation of the first drive motor 11 and the second drive motor 18, adjusts the angle and the extension amount, so that the first camera 21 automatically aligns with the glottis position. At this time, the automatic / manual switching button can be used to switch to the manual mode and perform the intubation operation manually.

[0050] The function of the radar visual recognition sensor 34 is to measure the distance between the camera and the target. In order to maintain good clarity after the lens is automatically focused, when the lens is at a certain distance from the target, such as 1 cm, the control program instruction of the AI ​​function automatically stops approaching the target.

[0051] The main function of the pressure sensor 35 is to prevent the AI ​​from contacting the patient's oral and pharyngeal mucosa during assistance and causing damage to the patient. When the pressure value of the pressure sensor 35 reaches the threshold, the AI ​​assistance function automatically stops.

[0052] Embodiment 3 of the present invention: Figure 1-Figure 4 As shown, on the basis of Example 1 or Example 2, a second camera 22 is fixedly provided at the end of the inner tube accommodating portion 2, and the second camera 22 is electrically connected to the controller 33. By setting the second camera 22, the visual range can be further improved. In this embodiment, the control button 30 also includes a screen switching button. By pressing the screen switching button, the display screen 7 can display the screen of the first camera 21 alone, or the display screen 7 can display the screen of the second camera 22 alone, or the display screen 7 can simultaneously display the screen of the first camera 21 and the second camera 22 in the form of split screen or picture-in-picture.

[0053] Embodiment 4 of the present invention: Figure 7 and Figure 8 As shown, based on Embodiment 1, Embodiment 2 and Embodiment 3, this embodiment improves the structure of the inner tube accommodating portion 2.

[0054] In this embodiment, the inner tube accommodating portion 2 is composed of a bottom plate 23, a side plate 24 and a top plate 25. One side of the bottom plate 23 is fixedly connected to the lower end of the side plate 24, and one side of the top plate 25 is fixedly connected to the upper end of the side plate 24. The width of the top plate 25 is smaller than that of the bottom plate 23.

[0055] Since the structure of the inner tube accommodating portion 2 has been changed, the structure of the tongue depressor assembly also needs to be changed. The tongue depressor assembly includes a fixing portion 26 and a tongue depressor 27. The tongue depressor 27 is fixedly connected to the fixing portion 26. The fixing portion 26 is designed to be contoured with the inner tube accommodating portion 2. A clamping plate 28 is formed on the fixing portion 26. The fixing portion 26 is clamped and fixed to the inner tube accommodating portion 2 by the clamping plate 28.

[0056] In this embodiment, the total length of the inner tube accommodating portion 2 is 20 cm-36 cm, preferably 35 cm, and the length of the inner tube 3 also needs to be increased accordingly.

[0057] Through the inner tube accommodating portion 2 with an open structure on one side, when working, the catheter can be firstly sleeved on the first camera 21, the snake tube 20 and the inner tube 3, and then the laryngoscope can be placed in the patient's mouth. The angle of the first camera 21 can be adjusted by manual control or AI-assisted method, so that the catheter can be quickly and accurately aligned with the position where the intubation is required. After the catheter is inserted, one hand presses the end of the catheter outside the patient's mouth, and the other hand pulls the laryngoscope outward to complete the catheter intubation work, which greatly improves the work efficiency and reduces the difficulty of operation.

[0058] Embodiment 5 of the present invention: Based on Embodiment 4, please combine Figure 7-Figure 9 Since the inner tube accommodating portion 2 is a semi-open structure, liquid, dust, etc. may enter the handle 1 from the bottom end, which may affect the structure inside the handle 1 and cause the problem of difficulty in disinfection. Therefore, in this embodiment, a baffle 36 is provided at the connection position between the handle 1 and the inner tube accommodating portion 2. A hole is provided in the middle of the baffle 36. The outer wall of one end of the bellows 37 is fixedly and sealedly connected to the hole on the baffle 36. The inner tube 3 passes through the bellows 37. The inner walls of both ends of the bellows 37 are fixedly and sealedly connected to the outer wall of the inner tube 3.

[0059] The bellows 37 can prevent dust and liquid from entering the handle 1 , thereby protecting the structure inside the handle 1 and solving the problem that the handle 1 cannot be disinfected.

[0060] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A laryngoscope based on a gear rack transmission, comprising a handle (1) and an inner tube (3), characterized in that: The bottom of the handle (1) is fixedly connected to the inner tube accommodating portion (2); a partition (4) is arranged inside the handle (1); a movable plate (5) and a movable plate driving mechanism are arranged on the partition (4); one end of the inner tube (3) is fixedly connected to the movable plate (5); the other end of the inner tube (3) is slidably connected to the inner tube accommodating portion (2); the movable plate driving mechanism is used to drive the movable plate (5) to move on the partition (4); a controller (33) is also arranged inside the handle (1); the movable plate driving mechanism is electrically connected to the controller (33); A rotating shaft (6) is rotatably mounted on the handle (1), and one end of the rotating shaft (6) is fixedly connected to the display screen (7); Two parallel and oppositely arranged limiting plates (8) are fixedly provided on one side of the partition plate (4), the two limiting plates (8) are arranged along the length direction of the handle (1), and the movable plate (5) is located between the two limiting plates (8); A gear avoidance hole (9) extending along the length direction of the movable plate (5) is provided in the middle part thereof, a rack (10) is fixedly provided on one side of the gear avoidance hole (9), the movable plate driving mechanism comprises a first driving motor (11) and a driving gear (12), the first driving motor (11) is fixedly provided on the partition (4), the first driving motor (11) and the movable plate (5) are located on the opposite side of the partition (4), the output shaft of the first driving motor (11) passes through the partition (4) and is fixedly connected to the driving gear (12), the driving gear (12) is located in the gear avoidance hole (9) and the driving gear (12) is meshed with the rack (10); The movable plate (5) is also provided with two elongated holes (13), the two elongated holes (13) are symmetrically arranged relative to the gear avoidance hole (9), two guide columns (14) respectively pass through the two elongated holes (13) and are threadedly connected to the partition plate (4), and end caps (15) are fixedly provided at the ends of the guide columns (14), and the diameter of the end caps (15) is greater than the width of the elongated holes (13); A connecting ring (16) is fixedly provided at one end of the movable plate (5), and one end of the inner tube (3) is plug-connected to the connecting ring (16) and fixed with screws; A mounting frame (17) is provided on the side wall of the movable plate (5), a second driving motor (18) is fixed on the mounting frame (17), a winding wheel (19) is fixed on the output shaft of the second driving motor (18), the end of the inner tube (3) is connected to the first camera (21) through a snake tube (20), and two wires of the snake tube (20) are wound on the winding wheel (19).

2. The laryngoscope based on gear rack transmission according to claim 1, characterized in that: A second camera (22) is fixedly arranged in the inner tube accommodating portion (2).

3. The laryngoscope based on gear rack transmission according to claim 1 or 2, characterized in that: The inner tube accommodating portion (2) is composed of a bottom plate (23), a side plate (24) and a top plate (25); one side of the bottom plate (23) is fixedly connected to the lower end of the side plate (24); one side of the top plate (25) is fixedly connected to the upper end of the side plate (24); and the width of the top plate (25) is smaller than the width of the bottom plate (23).

4. The laryngoscope based on gear rack transmission according to claim 3, characterized in that: The invention also comprises a tongue depressor assembly, the tongue depressor assembly comprising a fixing portion (26) and a tongue depressor plate (27), the tongue depressor plate (27) being fixedly connected to the fixing portion (26), a clamping plate (28) being formed on the fixing portion (26), and the fixing portion (26) being clamped and fixed to the inner tube accommodating portion (2) via the clamping plate (28).

5. The laryngoscope based on gear rack transmission according to claim 1, characterized in that: It also includes an AI control module, the AI ​​control module includes a central processing unit (31) and a memory (32), and the memory (32) is electrically connected to the central processing unit (31); A radar visual recognition sensor (34) and a pressure sensor (35) are also provided at the end of the snake tube (20), and the radar visual recognition sensor (34) and the pressure sensor (35) are both electrically connected to the controller (33).

6. The laryngoscope based on gear rack transmission according to claim 5, characterized in that: The central processing unit (31) is connected to the controller (33) via a wireless communication module.

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