Control mainboard and visual laryngoscope

Abstract

The utility model discloses a control mainboard and a visual laryngoscope, and relates to the field of printed circuit boards. Wherein the first printed circuit board is arranged on one side of the second printed circuit board in a center opposite pasting mode, control elements are embedded in the first printed circuit board and the second printed circuit board, and the multiple control elements are connected with corresponding interfaces in the first printed circuit board and the second printed circuit board. The interfaces corresponding to the plurality of control elements are mutually connected through conductive connecting wires, and each control element at least comprises a main control chip; the interfaces at least comprise a data address signal interface and an address and control signal interface. As the two printed circuit boards are transversely placed and are connected with each other in a central opposite attaching manner, the interfaces on the printed circuit boards are completely exposed and can be used, and the control mainboard which completely utilizes all the interfaces on the printed circuit boards is realized, so that the layout and wiring space of the control mainboard is increased.

Description

Technical Field

[0001] The utility model relates to the field of printed circuit boards, in particular to a control mainboard and a visual laryngoscope. Background Art

[0002] With the rapid development of medical laryngoscopes and printed circuit boards (PCBs), the control mainboard of existing medical laryngoscopes generally uses two printed circuits placed side by side, and various control components are arranged thereon. At this time, the side-by-side placement of the two printed circuit boards will cause the interfaces on the sides where the two printed circuit boards rely on each other to be unusable, resulting in a reduced and crowded layout and wiring space for the control mainboard.

[0003] In view of the above-mentioned prior art, it is an urgent problem to be solved by those skilled in the art to seek a control mainboard that fully utilizes all interfaces on a printed circuit board so as to increase the layout and wiring space of the control mainboard. Utility Model Content

[0004] The utility model aims to provide a control mainboard and a visual laryngoscope, which are used to solve the problem that two printed circuit boards are placed side by side, resulting in that all interfaces cannot be used, resulting in reduced and crowded layout and wiring space for the control mainboard.

[0005] In order to solve the above technical problems, the utility model also provides a control mainboard, comprising: a first printed circuit board, a second printed circuit board, and a plurality of control elements;

[0006] The first printed circuit board is arranged on one side of the second printed circuit board in a center-on-center manner, and control elements are embedded on both the first printed circuit board and the second printed circuit board. Multiple control elements are connected to corresponding interfaces on the first printed circuit board and the second printed circuit board, and the interfaces corresponding to the multiple control elements are interconnected through conductive connecting lines, wherein the control element at least includes a main control chip; and the interface at least includes a data address signal interface and an address and control signal interface.

[0007] In another aspect, the invention also includes: a plurality of vias;

[0008] The via holes are arranged on the first printed circuit board and the second printed circuit board, and the positions of the via holes arranged on the first printed circuit board correspond to the positions of the via holes arranged on the second printed circuit board.

[0009] On the other hand, a plurality of via holes are transversely arranged on the first printed circuit board and the second printed circuit board, and the number of the via holes is 28.

[0010] On the other hand, the data address signal interface is connected to the main control chip using a strip-shaped conductive connection line.

[0011] On the other hand, the address and control signal interfaces are connected to the main control chip through conductive connection lines in a T-type topology.

[0012] On the other hand, the first printed circuit board and the second printed circuit board constitute a double-layer printed circuit board.

[0013] In order to solve the above technical problems, the utility model also provides a visual laryngoscope, including: all the above control main boards.

[0014] On the other hand, it also includes: a host upper shell, a host lower shell;

[0015] The upper shell of the host is buckled with the lower shell of the host, and the control mainboard is arranged in a cavity formed by the upper shell of the host and the lower shell of the host.

[0016] On the other hand, it also includes: a display screen;

[0017] The display screen is embedded in the upper shell of the host.

[0018] On the other hand, it also includes: a rotating shaft, an upper rotating shaft cover, a lower rotating shaft cover, a left rotating shaft cover, and a right rotating shaft cover;

[0019] The shaft is connected to the lower shell of the main unit, and the shaft upper cover is buckled and connected to the shaft lower cover. The shaft left cover is arranged on the left side of the shaft upper cover and the shaft lower cover, and the shaft right cover is arranged on the right side of the shaft upper cover and the shaft lower cover.

[0020] On the other hand, it also includes: conductive cotton strips;

[0021] The conductive cotton strip is embedded in the control main board, and one side of the conductive cotton strip is in contact with the upper shell of the main machine.

[0022] The utility model also provides a control mainboard, wherein a first printed circuit board is arranged on one side of a second printed circuit board in a center-to-center manner, control elements are embedded on both the first printed circuit board and the second printed circuit board, a plurality of control elements are connected to corresponding interfaces on the first printed circuit board and the second printed circuit board, and the interfaces corresponding to the plurality of control elements are interconnected through conductive connecting lines, wherein the control element at least includes a main control chip; the interface at least includes a data address signal interface and an address and control signal interface. Since the two printed circuit boards are placed horizontally and interconnected in a center-to-center manner, the interfaces on the printed circuit boards are fully exposed and can be used, thereby realizing a control mainboard that fully utilizes all interfaces on the printed circuit boards, so as to increase the layout and wiring space of the control mainboard.

[0023] The utility model also provides a visual laryngoscope, which has the same effect as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A structural diagram of a control mainboard provided by the utility model;

[0026] Figure 2 The utility model provides a burst diagram of a visual laryngoscope.

[0027] Among them, 100 is the first printed circuit board, 111 is the second printed circuit board, 20 is a visual laryngoscope, 1 is a display screen, 2 is a round nail type light guide column, 3 is the upper shell of the host, 4 is a conductive cotton strip, 5 is the first self-tapping screw, 6 is the control main board, 7 is the lower shell of the host, 8 is a USB rubber plug, 9 is a screw, 10 is the host screw hole plug, 11 is the lower cover of the shaft, 12 is the shaft, 13 is the upper cover of the shaft, 14 is the right side cover of the shaft, 15 is the second self-tapping screw, 16 is the left side cover of the shaft, and 17 is a silicone button. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0029] The core of the utility model is to provide a control main board and a visual laryngoscope, by placing two printed circuit boards horizontally and interconnecting them in a center-to-center manner, so that the interfaces on the printed circuit boards are fully exposed and can be used, thereby realizing a control main board that fully utilizes all the interfaces on the printed circuit boards, so as to increase the layout and wiring space of the control main board.

[0030] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Figure 1 A structural diagram of a control mainboard provided by the utility model, such as Figure 1 As shown, the control main board includes: a first printed circuit board 100, a second printed circuit board 111, and a plurality of control elements;

[0032] The first printed circuit board is arranged on one side of the second printed circuit board in a center-on-center manner, and control elements are embedded on both the first printed circuit board and the second printed circuit board. Multiple control elements are connected to corresponding interfaces on the first printed circuit board and the second printed circuit board, and the interfaces corresponding to the multiple control elements are interconnected through conductive connecting lines, wherein the control element at least includes a main control chip; and the interface at least includes a data address signal interface and an address and control signal interface.

[0033] It should be noted that the printed circuit board can be set as a double data rate synchronous dynamic random access memory (Double Data Rate, DDR), and it should be noted that the double data rate synchronous dynamic random access memory is composed of a printed circuit board and a plurality of components mounted on the printed circuit board. In this case, the model of the double data rate synchronous dynamic random access memory is DDR3L SDRAM, and in this case, the first printed circuit board and the second printed circuit board are both placed horizontally based on the longer side length.

[0034] The topology of the double rate synchronous dynamic random access memory is classified into a T-type topology and a daisy chain topology. In some embodiments, the address and control signal interface is connected to the main control chip through a conductive connection line using a T-type topology, so that the length of the conductive connection line on each branch to the corresponding interface is consistent, ensuring that the corresponding interface receives the signal almost at the same time, which can effectively avoid signal asynchrony and the timing is easier to control;

[0035] It should be noted that the main control chip on the printed circuit board is also connected to a wireless connection module, an embedded memory standard module (Embedded Multi Media Card, EMMC), a camera module, a button and a lighting control module, a display screen, a debugging serial port module, and a power management chip; among them, the wireless connection module can be set to a WIFI module.

[0036] Since the two printed circuit boards are placed horizontally and interconnected in a center-to-center manner, the interfaces on the printed circuit boards are completely exposed and can be used, thereby realizing a control main board that fully utilizes all interfaces on the printed circuit boards, thereby increasing the layout and wiring space of the control main board.

[0037] It should be noted that the first printed circuit board and the second printed circuit board form a double-layer printed circuit board. At this time, a 6-layer stacking design is adopted for the combined double-layer printed circuit board to further improve the signal integrity and power integrity of the single board, wherein the memory capacity of DDR3L SDRAM is 512MB. The capacitors and resistors to be used are placed close to the interface of DDR3L SDRAM to reduce the layout space; the DDR3L SDRAM is placed horizontally and placed close to the main control chip, wherein the spacing between multiple control components set on the printed circuit board is about 5mm, thereby shortening the distance of the signal routing; wherein the data address signal interface is connected to the main control chip using a strip-shaped conductive connection line. The data address signal lines on the DDR3L SDRAM are grouped and processed, and the data lines are fanned out nearby. Here, a strip-shaped conductive connection line is used to connect to the main control chip, which can provide shielding and protection for the signal routing and reduce signal radiation and crosstalk.

[0038] According to the above embodiment, on the basis of connecting with the main control chip through the conductive connection line in the T-type topology, it also includes: multiple vias; the vias are arranged on the first printed circuit board and the second printed circuit board, and the position of the vias arranged on the first printed circuit board corresponds to the position of the vias arranged on the second printed circuit board. Among them, multiple vias are arranged horizontally on the first printed circuit board and the second printed circuit board, and the number of vias is 28; the vias are specifically arranged between the third column interface and the seventh column interface of the first printed circuit board and the second printed circuit board, so as to ensure that the conductive connection lines are connected to each other by vias, and to ensure that the lengths of the conductive connection lines passing through multiple vias are kept consistent as much as possible; wherein, the vias should be VIA vias, and the address and control signal lines led out from the vias are also connected to the main control chip using strip-shaped conductive connection lines, which can provide shielding and protection for the signal routing and reduce signal radiation and crosstalk.

[0039] In addition, it should be noted that all conductive connecting lines on the printed circuit board must have a complete reference surface to ensure the integrity of the copper plating of the power and / or ground planes. Too dense vias will interrupt the plane and directly affect the performance of DDR3LSDRAM.

[0040] It is understandable that additional speed testing equipment can also be used to test the speed of the control motherboard, test the stability of the memory, and test the fault tolerance capability.

[0041] The control mainboard embodiment is described in detail above, and the utility model also provides a corresponding embodiment of a visual laryngoscope.

[0042] The visual laryngoscope 20 provided by the present invention has, in addition to the control mainboard 6, a plurality of other components, in order to protect the visual laryngoscope and ensure that the structure is complete. Figure 2 A burst diagram of a visual laryngoscope provided by the utility model, such as Figure 2 As shown, the video laryngoscope also includes: a mainframe upper shell 3, a mainframe lower shell 7, and a display screen 1; the mainframe upper shell and the mainframe lower shell are buckled together, and the control mainboard is arranged in a cavity formed by the mainframe upper shell and the mainframe lower shell; the display screen is embedded in the mainframe upper shell.

[0043] On the basis of some embodiments, it also includes: a shaft 12, a shaft upper cover 13, a shaft lower cover 11, a shaft left cover 16, and a shaft right cover 14; the shaft is connected to the main body lower shell, and the shaft upper cover is buckled and connected with the shaft lower cover, the shaft left cover is arranged on the left side of the shaft upper cover and the shaft lower cover, and the shaft right cover is arranged on the right side of the shaft upper cover and the shaft lower cover. In order to ensure the conductivity of the visual laryngoscope, it also includes: a conductive cotton strip 4; the conductive cotton strip is embedded in the control main board, and one side of the conductive cotton strip is in contact with the main body upper shell.

[0044] In addition, it is also necessary to explain that a round nail-type light guide column 2 is provided in the upper right corner of the display screen to facilitate light recognition of the visual laryngoscope through the round nail-type light guide column; wherein, the first self-tapping screw 5 is used to fix the control mainboard, and the second self-tapping screw 15 is used to fix the rotating shaft 12; in order to prevent the visual laryngoscope from malfunctioning due to water ingress during use, a USB rubber plug 8 is also provided; in order to make the lower shell of the host and the upper shell of the host more stably fixed, a plurality of screws 9 are provided on the four corners of the lower shell of the host, and similarly, in order to prevent the screws from rusting due to water ingress during use of the visual laryngoscope, resulting in unstable fixation of the lower shell of the host and the upper shell of the host, a host screw hole plug 10 is also provided corresponding to the screw, and similarly, in order to prevent the buttons from rusting and becoming unusable due to water ingress during use of the visual laryngoscope, the buttons are also provided as silicone buttons 17.

[0045] It should also be noted that the video laryngoscope is composed of a lens, a charge-coupled device (CCD), an analog-to-digital converter, a microprocessor (MPU), a built-in memory, a display screen (LCD), an interface (at least: a computer interface and / or a WIFI / BT data transmission interface, etc.), a built-in lithium battery, etc., and the above devices are all installed inside the video laryngoscope.

[0046] The working principle of the video laryngoscope is as follows: when the shutter is pressed, the lens converges the light onto the photosensitive coupling component, and the photosensitive coupling component converts the light signal into an electrical signal. At this time, an electronic image corresponding to the photographed scene is obtained, and the electronic image is processed according to the digital signal process (DSP), and the analog signal of the electronic image is converted into a digital signal using an analog-to-digital converter. Further, a microprocessor is used to compress the electronic image of the digital signal and convert it into a specific image format, such as JPEG format. Finally, the electronic image file is stored in a built-in memory. At this time, the video laryngoscope views the captured electronic image through the display screen. At the same time, the video laryngoscope supports a continuous monitoring mode, which can continuously obtain external electronic images and display them on the display screen, with a time delay of less than 250ms. The video laryngoscope integrates multiple fill lights in different directions. When the video laryngoscope is continuously running, the fill lights are continuously lit, which is convenient for fill light in a lightless environment (throat) and obtains sufficient light to obtain a shadowless electronic image. In addition, an interface for connecting to a computer is provided to export electronic images to the computer. In addition, a reserved WIFI / BT data transmission interface can transmit electronic images to an external display device via WIFI and / or BT.

[0047] The video laryngoscope is at least equipped with a lens, a CCD, an analog-to-digital converter, a microprocessor, a storage device, a display screen, an output interface, and a battery. The specific uses of all the above components are as follows:

[0048] First, the lens: The focal length of the lens of a video laryngoscope is generally short, ranging from 6 mm to 50 mm; the lens can generally be set to: standard lens, wide-angle lens, telephoto lens and fisheye lens, which are used for general photography, landscape photography, portrait photography and special photography respectively. The different focal lengths of various lenses result in different shooting angles, and different shooting effects are also different. The video laryngoscope focuses on photographing the patient's internal disease condition, which belongs to close-focus shooting and framing. Therefore, the lens of the video laryngoscope needs to be set to a lens that allows close-focus shooting and framing;

[0049] Second, CCD: The visual laryngoscope uses CCD instead of the film of the camera. CCD is a surface photoelectric device made using microelectronic technology, which can realize the photoelectric conversion function. There are many photosensitive units on the CCD device, which can convert light into electric charge to form an electronic image corresponding to the scene. Each photosensitive unit corresponds to a pixel in the image. The more pixels, the clearer the image. It can be understood that if you want to get a high-definition image, you must increase the number of photosensitive units. In some embodiments, the visual laryngoscope generally gives multiple indicators about resolution, such as 640×480 and 1280×720. Among them, the product of the highest resolution is 1280720 (1280×720), and a 1 million pixel image can be obtained through CCD. It should be noted that CCD itself cannot distinguish colors. There are many ways to achieve color photography, including adding a color filter array (CFA) to the surface of the CCD device, or using a spectroscopic system to divide the light into red, green, and blue, which are received by 3 CCDs respectively.

[0050] Third, analog-to-digital converter: converts analog electrical signals into digital electrical signals; at this time, the main purpose of the analog-to-digital converter is conversion speed and quantization accuracy. Conversion speed refers to the time used to convert an analog signal into a digital signal. Due to the large number of pixels in high-resolution images, the conversion speed is very high. In some embodiments, a high-speed chip can also be provided to increase the conversion speed. Correspondingly, the provision of a high-speed chip will increase the cost of the visual laryngoscope; quantization accuracy refers to the ability to divide analog signals into multiple levels, specifically: quantizing the brightness or color value of each pixel in the photosensitive unit of the CCD into multiple levels, where the levels can be called color depth, which can also be understood as the number of color bits. The color bit number is in binary bits (bit), and the number of bits represents the number of colors. Common color bit numbers are 24 bits, 30 bits, and Or 36 bits, the total color depth of the three primary colors red, green and blue is the number of primary color bits multiplied by 3, that is, 8×3=24 bits, 10×3=30 bits or 12×3=36 bits; color depth reflects how much color the lens can correctly represent; taking 24 bits as an example, the three primary colors (red, green and blue) each occupy 8 bits of binary number, which means that red can be divided into 2^8=256 different levels, and the same is true for green and blue, then their combination is 256×256×256=16777216, or 16 million colors, while 30 bits can represent 1 billion colors and 36 bits can represent 68 billion colors; what can be understood at this time is that the higher the color depth value, the more realistic the color can be restored.

[0051] Fourth, microprocessor (MPU): The video laryngoscope must have a complete control system to realize operations such as light measurement, calculation, exposure, flash control, shooting logic control, and image compression processing. The video laryngoscope uses the MPU to achieve unified coordination and control of various operations. The camera control is manual control, which is manually controlled by the doctor. The picture is taken and saved by pressing a button or a screen camera control. It can be understood that the automatic exposure mode is programmed automatic exposure, specifically: the MPU automatically adjusts the aperture and shutter by analyzing the light sensitivity of the CCD to facilitate exposure adjustment.

[0052] Fifth, storage device: The function of the storage device in the video laryngoscope is to store image data. At this time, the image data in the storage device can be repeatedly recorded and deleted. The storage device is a semiconductor memory built into the video laryngoscope, which is used to temporarily store image data. When the image is transmitted to the microprocessor, it is transmitted through the Universal Serial Bus (USB). The storage device in this embodiment needs to transfer the image data to the microprocessor in time or manually delete the image data after storing the image data, otherwise the image data cannot be stored in the storage device. The amount of image data stored in the storage device depends on the capacity of the storage device (in MB), as well as the image quality and the size of an image file (in KB); the higher the image quality, the larger the image file, and the larger the storage space required. The storage device used in this embodiment is an 8GB EMMC with a read and write speed of up to 100MB / S, which can achieve instant shooting and storage. A single 720P picture is about 2.7MB, so excluding the instructions for the microprocessor to perform various operations and read and write and the space occupied by the operating system, the storage device can generally store 1000-2000 photos.

[0053] Sixth, display screen:

[0054] In this embodiment, the display screen can be set as a liquid crystal display (LCD). In some embodiments, the liquid crystal display screen is a thin film transistor liquid crystal display (TFT-LCD). In this case, a clear picture can be obtained from all angles. It should be noted that the functions of the liquid crystal display screen are: framing, display, and selection of function menus.

[0055] Seventh, capacitive touch screen:

[0056] The input interface of the video laryngoscope mainly includes three physical buttons and a capacitive touch panel. The capacitive touch screen is used to respond to the user's touch events; the display screen is used to display the operations and pages after the response. The capacitive touch screen senses the movement of the user's fingers to control the movement of the pointer. The capacitive touch panel is made of a printed circuit board into an array of rows and columns; the printed circuit board and the surface plastic film are bonded with a strong double-sided adhesive, and its sensing detection principle is capacitive sensing; an integrated circuit board is arranged under the surface of the printed circuit board. At this time, the integrated circuit board will measure and report the sensing trajectory in real time, thereby detecting the movement and position of the user's fingers. At this time, the operation mode of adding a capacitive touch screen and a button combination to the video laryngoscope can effectively improve the flexibility of the user in actual operation.

[0057] Eighth, output interface: The output interface of the video laryngoscope mainly includes a microprocessor communication interface, a WIFI interface for connecting to the network, and a Bluetooth interface for connecting to Bluetooth, so as to facilitate the export of data in a variety of ways.

[0058] Ninth, battery: The battery installed inside the video laryngoscope is a rechargeable lithium polymer battery with a battery voltage of 4.2V and a capacity of 1600mAh, which can support more than 4 hours of operation. At the same time, the video laryngoscope is integrated with a charging chip, which is charged through a USB interface. The charging time is about 1 hour, which is convenient for users to use and maintain the video laryngoscope.

[0059] The above is a detailed introduction to a control mainboard and a visual laryngoscope provided by the utility model. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0060] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A control motherboard, characterized in that: include: A first printed circuit board, a second printed circuit board, and a plurality of control components; The first printed circuit board is arranged on one side of the second printed circuit board in a center-on-center manner, and the control elements are embedded on both the first printed circuit board and the second printed circuit board. Multiple control elements are connected to corresponding interfaces on the first printed circuit board and the second printed circuit board, and the interfaces corresponding to the multiple control elements are interconnected through conductive connecting lines, wherein the control element includes at least a main control chip; and the interface includes at least a data address signal interface and an address and control signal interface.

2. The control mainboard according to claim 1, characterized in that: Also includes: Multiple vias; The via holes are arranged on the first printed circuit board and the second printed circuit board, and the positions of the via holes arranged on the first printed circuit board correspond to the positions of the via holes arranged on the second printed circuit board.

3. The control mainboard according to claim 2, characterized in that: The plurality of via holes are transversely arranged on the first printed circuit board and the second printed circuit board, and the number of the via holes is 28.

4. The control mainboard according to claim 1, characterized in that: The data address signal interface is connected to the main control chip using the strip-shaped conductive connection line.

5. The control mainboard according to claim 1, characterized in that: The address and control signal interface is connected to the main control chip through the conductive connection line in a T-type topology.

6. The control mainboard according to any one of claims 1 to 5, characterized in that: The first printed circuit board and the second printed circuit board form a double-layer printed circuit board.

7. A video laryngoscope, characterized in that: include: A control motherboard as claimed in any one of claims 1 to 6.

8. The video laryngoscope according to claim 7, characterized in that: Also includes: Host upper shell, host lower shell; The host upper shell and the host lower shell are buckled together, and the control mainboard is arranged in a cavity formed by the host upper shell and the host lower shell.

9. The video laryngoscope according to claim 8, characterized in that: Also includes: Display screen; The display screen is embedded in the upper shell of the host.

10. The video laryngoscope according to claim 8, characterized in that: Also includes: Rotating shaft, rotating shaft upper cover, rotating shaft lower cover, rotating shaft left cover, rotating shaft right cover; The rotating shaft is connected to the lower shell of the main body, and the rotating shaft upper cover is buckled and connected with the rotating shaft lower cover, the rotating shaft left cover is arranged on the left side of the rotating shaft upper cover and the rotating shaft lower cover, and the rotating shaft right cover is arranged on the right side of the rotating shaft upper cover and the rotating shaft lower cover.

11. The video laryngoscope according to claim 8, characterized in that: Also includes: Conductive cotton strips; The conductive cotton strip is embedded in the control main board, and one side of the conductive cotton strip is in contact with the main body upper shell.

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