A video kiosk system

Abstract

The application provides a video exhibition stand system, comprising: an exhibition stand body, a supporting plate, an electromagnet assembly and a control system; the supporting plate is rotationally connected with the exhibition stand body, and the supporting plate can rotate relative to the exhibition stand body to a closed position and an open position; the electromagnet assembly is arranged on the exhibition stand body, and the electromagnet assembly is magnetically attracted to the supporting plate when the supporting plate rotates to the closed position. Compared with the prior art, in the video exhibition stand system, the supporting plate can be locked or unlocked by the electromagnet assembly, without the need of using a mechanical mechanism to achieve locking, so that wear can be reduced, and the terminal equipment in the classroom can be operated by the control system to control the electromagnet assembly to unlock the supporting plate, and at the same time, other terminal equipment is synchronously started, so that the one-key starting function is achieved, and the preparation work of the teacher is facilitated; the elastic ejection structure and the elastic buffer structure can automatically eject the supporting plate and slowly and stably open the supporting plate, so that the safe and automatic opening mode of the supporting plate is achieved.

Description

Technical Field

[0001] This invention relates to the field of exhibition booth technology, and more specifically to a video exhibition booth system. Background Technology

[0002] Video display stand systems are indispensable equipment in multimedia classrooms. By connecting to output devices such as projectors and televisions, they can display materials, handouts, physical objects, and slides, making them extremely convenient to use. A video display stand system typically consists of a stand body and a support plate. The support plate rotates and engages with the stand body. When the support plate is open relative to the stand body, it can be used to hold the items to be displayed. When not in use, the support plate can rotate towards the stand body to close.

[0003] In existing technologies, the tray needs a latching structure to lock with the display stand body when closed. The latching structure usually includes a latching groove on the tray and a button latch on the display stand body. The button latch engages with the latching groove to lock the tray. Teachers need to manually press the button latch to unlock the tray. However, as teaching equipment becomes increasingly intelligent, teachers need to turn on many teaching devices before class, such as the projector, the projection screen, and the computer on the podium. Teachers not only need to turn on each teaching device one by one, but also need to press mechanical mechanisms such as button latches, making the pre-class preparation work quite cumbersome. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a video display stand system.

[0005] One embodiment of the present invention provides a video display stand system, including: a display stand body, a support plate, an electromagnet assembly, and a control system;

[0006] The tray is rotatably engaged with the main body of the booth, and the tray can rotate relative to the main body of the booth to a closed position and an open position;

[0007] The electromagnet assembly is mounted on the display stand body. When the tray rotates to the closed position, the electromagnet assembly magnetically engages with the tray.

[0008] The control system is connected to the electromagnet assembly. When the electromagnet assembly receives a control signal from the control system, the electromagnet assembly releases its magnetic attraction to the tray, and the tray moves toward the open position under its own gravity.

[0009] In some optional embodiments, the main body of the display stand is provided with an elastic ejection structure. When the tray is rotated to the closed position, the tray presses against the elastic ejection structure to cause the elastic ejection structure to undergo elastic deformation.

[0010] In some alternative embodiments, the elastic ejection structure includes an ejector pin and an ejection spring, the ejection spring being disposed on the main body of the display stand, the ejector pin being movably disposed on the main body of the display stand, and the ejector pin being connected to the ejection spring;

[0011] When the tray is rotated to the closed position, the tray presses against the ejector pin to compress or stretch the ejector spring.

[0012] In some optional embodiments, the electromagnet assembly includes a circuit board and a plurality of electromagnets, the circuit board and the electromagnets being disposed on the main body of the exhibition stand, and the circuit board being provided with conductive spring pins that press against the electromagnets.

[0013] The electromagnet is magnetically attracted to the tray.

[0014] In some optional embodiments, the tray is provided with a plurality of magnetic attraction components, and when the tray is rotated to the closed position, the electromagnet assembly magnetically engages with the magnetic attraction components.

[0015] In some alternative implementations, the video display stand system further includes an elastic buffer structure connected to both the stand body and the tray. When the tray rotates from the closed position to the open position, the stand body and the tray cause the elastic buffer structure to undergo elastic deformation.

[0016] In some alternative implementations, the video booth system also includes a rotating shaft and a shaft support that rotate with each other.

[0017] The pivot component is disposed on the display stand body, and the pivot bracket is disposed on the tray, or the pivot component is disposed on the tray, and the pivot bracket is disposed on the display stand body;

[0018] The elastic buffer structure is a torsion spring, which is sleeved on the outside of the rotating shaft. One end of the torsion spring is connected to the rotating shaft bracket, and the other end of the torsion spring is connected to the rotating shaft. When the tray rotates from the closed position to the open position, the rotating shaft bracket and the rotating shaft drive the torsion spring to torsion and deform.

[0019] In some alternative implementations, the video booth system also includes a rotating shaft and a shaft support that rotate with each other.

[0020] The pivot component is disposed on the display stand body, and the pivot bracket is disposed on the tray, or the pivot component is disposed on the tray, and the pivot bracket is disposed on the display stand body;

[0021] The rotating shaft is provided with a support and a compression spring. The support, the rotating shaft bracket and the compression spring are arranged sequentially along the axial direction of the rotating shaft. The compression spring presses the rotating shaft bracket against the support.

[0022] In some alternative embodiments, the end of the rotating shaft is further provided with a threaded part, one end of the compression spring abuts against the threaded part through a first washer, and the other end of the compression spring abuts against the rotating shaft bracket through a second washer.

[0023] In some optional embodiments, the display stand body is provided with a stop portion, and the tray is provided with a stop engagement portion. When the tray is rotated to the open position, the stop engagement portion engages with the stop portion for a limiting fit.

[0024] In some optional embodiments, the control system further includes a control module and a terminal device. The control module is connected to the terminal device for control. The control module is used to send the control signal. When the electromagnet assembly receives the control signal and releases its magnetic attraction with the tray, the terminal device synchronously receives the control signal and responds to the corresponding function.

[0025] In some alternative implementations, the video display system also includes a one-button control button, which is signal-connected to the control system, and the control system responds to user operations through the one-button control button.

[0026] Compared to existing technologies, the video display system of this invention uses an electromagnet assembly to lock or unlock the tray, eliminating the need for mechanical locking mechanisms. This reduces wear and extends service life. Furthermore, the terminal devices in the classroom can be operated through the control system. While the electromagnet assembly unlocks the tray, it simultaneously activates other terminal devices, enabling one-button start-up and facilitating faster teacher preparation. In addition, the elastic ejection and buffer structures allow the tray to be automatically ejected and opened slowly and steadily, achieving a safe and automatic tray opening method.

[0027] To provide a clearer understanding of the present invention, the specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a video display stand system according to an embodiment of the present invention;

[0029] Figure 2 This is a cross-sectional view of a video display system according to an embodiment of the present invention when the tray is rotated to the open position;

[0030] Figure 3This is a cross-sectional view of a video display system according to an embodiment of the present invention when the tray is rotated to the closed position;

[0031] Figure 4 for Figure 3 The enlarged view at point A is shown below;

[0032] Figure 5 This is a schematic diagram of the rotating shaft component, elastic buffer structure, and rotating shaft support according to an embodiment of the present invention;

[0033] Figure 6 This is an exploded view of a rotating shaft, an elastic buffer structure, and a rotating shaft support according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Main body of the booth; 11. Elastic ejection structure; 111. Ejector pin; 112. Ejection spring; 20. Support plate; 21. Magnetic attraction component; 30. Electromagnet assembly; 31. Circuit board; 311. Conductive spring pin; 32. Electromagnet; 40. Elastic buffer structure; 50. Rotating shaft component; 51. Support part; 52. Compression spring; 521. First washer; 522. Second washer; 53. Threaded component; 54. Stop component; 60. Rotating shaft bracket; 61. Stop part. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more, and "a number" means one or more. Furthermore, unless otherwise stated, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "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.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In the description of this invention, references to terms such as "one embodiment," "some alternative implementations," or "some optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] In existing technologies, the tray needs a latching structure to lock with the display stand body when closed. The latching structure usually includes a latching groove on the tray and a button latch on the display stand body. The button latch engages with the latching groove to lock the tray. Teachers need to manually press the button latch to unlock the tray. However, as teaching equipment becomes increasingly intelligent, teachers need to turn on many teaching devices before class, such as the projector, the projection screen, and the computer on the podium. Teachers not only need to turn on each teaching device one by one, but also need to actively find and press the button latches and other mechanical mechanisms, making the pre-class preparation work cumbersome and difficult to adapt to increasingly intelligent application scenarios.

[0041] In the video display system of this invention, an electromagnet assembly is used to lock or unlock the tray. The control system simultaneously unlocks the tray and activates other teaching devices or software, allowing teachers to quickly complete pre-class preparations with simple operation of the control system. Furthermore, the combination of an elastic ejection structure and an elastic buffer structure allows the tray to be automatically ejected and opened slowly and steadily, achieving automatic, stable, and safe opening. Since no mechanical locking mechanism is required, wear is reduced, and service life is increased.

[0042] Please see Figure 1 and Figure 2 One embodiment of the present invention provides a video display stand system, including: a display stand body 10, a support plate 20 and an electromagnet assembly 30;

[0043] Please see Figure 2 and Figure 3The tray 20 is rotatably engaged with the main body 10 of the display stand, and the tray 20 can rotate relative to the main body 10 to a closed position and an open position. An electromagnet assembly 30 is mounted on the main body of the display stand. When the tray 20 rotates to the closed position, the electromagnet assembly 30 magnetically engages with the tray 20. When it is necessary to open the tray 20, the electromagnet assembly 30 releases its magnetic attraction, allowing the tray 20 to rotate to the open position. Locking or unlocking the tray 20 using the electromagnet assembly 30 is convenient and quick. Compared to existing technologies, it eliminates the need for a mechanical mechanism to lock the tray 20, reducing wear and increasing its service life.

[0044] The control system is connected to the electromagnet assembly 30. When the electromagnet assembly 30 receives a control signal from the control system, it releases its magnetic attraction to the tray 20, and the tray moves towards the open position under its own weight, thus automatically opening the tray 20. Modern smart classrooms typically have control systems for various teaching devices or software. Linking the electromagnet assembly 30 of the video display system with the smart classroom's control system eliminates the need for teachers to locate mechanical mechanisms for unlocking, simplifying teacher use and lesson preparation. When the tray 20 is not needed, it can be flipped back to the closed position. The electromagnet assembly 30 can then be restarted via the control system or other control switches to re-engage with the tray 20.

[0045] The control system also includes a control module and a terminal device. The control module is connected to the terminal device. The control module is used to send control signals. When the electromagnet assembly 30 receives the control signal and releases its magnetic attraction with the tray 20, the terminal device synchronously receives the control signal and responds to the corresponding function.

[0046] The terminal equipment includes one or more of the following: projection equipment, projection screen equipment, lectern equipment, audio equipment, microphone equipment, and door / window equipment. The terminal equipment's response function can be to turn on the terminal equipment or launch software within it. For example, when the terminal equipment includes a projection equipment, projection screen equipment, lectern equipment, audio equipment, microphone equipment, and door / window equipment, the projection equipment receives a control signal and turns on the projection equipment; the projection screen equipment receives a control signal and unfolds the projection screen; the lectern equipment receives a control signal and turns on the computer on the lectern equipment; the audio equipment receives a control signal and turns on the audio equipment; the microphone equipment receives a control signal and turns on the microphone equipment; the door / window equipment receives a control signal and closes the door / window equipment; the lectern equipment receives a control signal and launches the software within the computer on the lectern equipment; the camera located on the display stand body 10 receives a control signal and launches the control software corresponding to the camera, and so on. Of course, in other embodiments, the terminal equipment may also include other equipment, not limited to those described above. Unified control of the electromagnet assembly 30 and the terminal equipment through the control module facilitates faster preparation for teachers.

[0047] Because teachers can quickly and synchronously control other terminal devices when the tray 20 is opened through the control system, without the need for teachers to operate them individually, the teaching preparation time of teachers is greatly shortened.

[0048] In this embodiment, the terminal device includes a podium device, and the control module is built into the podium device; of course, the control module can also be set on the booth body 10, and this example is not limited.

[0049] In some optional embodiments, the video display stand system also includes a one-button control button. The one-button control button is signal-connected to the control module of the control system, and the control system responds to user operations via the one-button control button. After the teacher triggers the one-button control button, the control system sends a control signal, causing the electromagnet assembly 30 to disengage from the magnetic attraction of the tray 20. Simultaneously, the teaching function equipment and / or teaching software synchronously activate their corresponding functions. This allows the teacher to perform the corresponding pre-class preparation work simply by clicking the one-button control button, simplifying the teacher's pre-class preparation work, greatly facilitating teaching, improving teaching efficiency, and providing a better user experience. In this embodiment, the teaching function equipment includes a lectern, and the one-button control button is located on the lectern. Of course, the one-button control button can also be located on the display stand body 10 or other suitable locations; this example is not limited to this one.

[0050] Please see Figure 3 and Figure 4In some optional embodiments, the main body 10 of the display stand is provided with an elastic ejection structure 11. When the tray 20 rotates to the closed position, the tray 20 presses against the elastic ejection structure 11, causing the elastic ejection structure 11 to undergo elastic deformation. After the electromagnet assembly 30 unlocks the tray 20, the elastic force of the elastic ejection structure 11 will drive the tray 20 to rotate toward the open position, achieving an automatic pop-out effect, so that the teacher does not need to manually rotate the tray 20 to the open position. After class, the teacher can manually rotate the tray 20 back to the closed position, causing the elastic ejection structure 11 to be squeezed again.

[0051] Please see Figure 4 The specific structure of the elastic ejection structure 11 can be selected according to actual needs. For example, in some optional embodiments, the elastic ejection structure 11 includes an ejector pin 111 and an ejection spring 112. The ejection spring 112 is disposed on the display stand body 10, and the ejector pin 111 is movably disposed on the display stand body 10, and the ejector pin 111 is connected to the ejection spring 112. When the tray 20 rotates to the closed position, the tray 20 presses against the ejector pin 111 to compress or stretch the ejection spring 112. In this embodiment, the ejector pin 111 presses against the ejection spring 112 to compress the ejection spring 112. After the electromagnet assembly 30 unlocks the tray 20, the elastic force of the ejection spring 112 will drive the ejector pin 111 to push the tray 20, causing the tray 20 to rotate toward the open position.

[0052] Please see Figure 3 and Figure 4 The specific structure of the electromagnet assembly 30 can be selected according to actual needs. For example, the electromagnet assembly 30 includes several electromagnets 32 magnetically engaged with the trays 20. The electromagnets 32 are mounted on the display stand body and electrically connected to the control system on the display stand body, thus facilitating teacher operation. In this embodiment, the electromagnet assembly 30 includes a circuit board 31 and several electromagnets 32 magnetically engaged with the trays 20. The circuit board 31 and the electromagnets 32 are mounted on the display stand body 10. The circuit board 31 is provided with conductive spring pins 311, which press against the electromagnets 32, thereby realizing the electrical connection between the circuit board 31 and the electromagnets 32. The circuit board 31 can be designed with appropriate circuitry to control and power the electromagnets 32. The number of electromagnets 32 can be one or more.

[0053] Please see Figure 3 and Figure 4The magnetic attraction method between the electromagnet assembly 30 and the tray 20 can be selected according to actual needs. For example, the tray 20 can be made entirely or partially of a magnetic metal material, such as iron, so that the tray 20 can be magnetically attracted to the electromagnet assembly 30. Alternatively, the tray 20 can be made of a non-magnetic material, but a magnetic structure that magnetically engages with the electromagnet assembly 30 can be provided on the tray 20. For example, in some optional embodiments, the tray 20 has several magnetic engaging parts 21. When the tray 20 rotates to the closed position, the electromagnet assembly 30 magnetically engages with the magnetic engaging parts 21. The magnetic engaging parts 21 can be magnets or iron. The number of magnetic engaging parts 21 can be one or more. In this embodiment, there are two electromagnets 32 and two magnetic engaging parts 21, and the electromagnets 32 and the magnetic engaging parts 21 are magnetically engaged in a one-to-one correspondence.

[0054] Please see Figure 5 In some optional embodiments, the video display stand system further includes an elastic buffer structure 40, which is connected to both the display stand body and the tray 20. When the tray 20 rotates from the closed position to the open position, the display stand body and the tray 20 drive the elastic buffer structure 40 to undergo elastic deformation, generating a buffering force. This buffering force acts on the tray 20 to reduce the speed at which the tray 20 rotates towards the open position, allowing the tray 20 to rotate slowly. This improves the safety of opening the tray 20 and prevents it from rotating rapidly due to gravity or other reasons. In this embodiment, although the tray 20 can be automatically opened via the elastic ejection structure 11, the tray 20 is ejected at a relatively high speed, which can easily cause the tray 20 to rotate too fast, potentially colliding with other structures or causing injury to the user. The elastic buffer structure 40 provides cushioning for the tray 20, allowing it to open automatically while also rotating stably and safely to the open position, resulting in a better user experience.

[0055] Please see Figure 2 and Figure 5 In some optional embodiments, the video display stand system further includes a rotating shaft 50 and a rotating shaft bracket 60 that rotate and cooperate with each other; the rotating shaft 50 is disposed on the display stand body and the rotating shaft bracket 60 is disposed on the tray 20, or the rotating shaft 50 is disposed on the tray 20 and the rotating shaft bracket 60 is disposed on the display stand body. In this embodiment, the rotating shaft 50 is disposed on the tray 20 and the rotating shaft bracket 60 is disposed on the display stand body as an example for explanation.

[0056] The specific structure of the elastic buffer structure 40 can be selected according to actual needs. For example, in some optional embodiments, the elastic buffer structure 40 is a torsion spring, which is sleeved on the outside of the rotating shaft 50. One end of the torsion spring is connected to the rotating shaft support 60, and the other end of the torsion spring is connected to the rotating shaft 50. When the tray 20 rotates from the closed position to the open position, the rotating shaft support 60 and the rotating shaft 50 drive the torsion spring to twist and deform. The elastic force of the torsion spring can then apply a buffering effect to the tray 20 through the rotating shaft 50. Of course, the elastic buffer structure 40 can also be a tension spring, with both ends of the tension spring connected to the display stand body and the tray 20, respectively.

[0057] In this embodiment, a pivot component 50 is provided on both sides of the tray 20, and a torsion spring is provided on each of the two pivot components 50. The display stand body is provided with two pivot brackets 60 that cooperate with the pivot components 50, thereby improving the stability of the rotation of the tray 20.

[0058] Please see Figure 5 and Figure 6 In some optional embodiments, the rotating shaft 50 is provided with a support 51 and a compression spring 52. The support 51, the rotating shaft bracket 60 and the compression spring 52 are arranged sequentially along the axial direction of the rotating shaft 50. The compression spring 52 presses the rotating shaft bracket 60 against the support 51, so that the rotating shaft bracket 60 is tightly pressed against the support 51, and it is not easy for the rotating shaft bracket 60 to wobble when it rotates relative to the rotating shaft 50.

[0059] Please see Figure 5 and Figure 6 In some optional embodiments, the end of the pivot 50 is further provided with a threaded part 53. One end of the compression spring 52 abuts against the threaded part 53 via a first washer 521, and the other end of the compression spring 52 abuts against the pivot bracket 60 via a second washer 522. The threaded part 53 can adjust the compression force of the compression spring 52 on the pivot bracket 60. The first washer 521 and the second washer 522 together make the pressure of the compression spring 52 on the threaded part 53 and the pivot bracket 60 more uniform.

[0060] Please see Figure 5 and Figure 6 In some optional embodiments, the display stand body is provided with a stop part 61 and the tray 20 is provided with a stop engaging part 54. When the tray 20 is rotated to the open position, the stop engaging part 54 engages with the stop part 61 to limit the rotation angle of the tray 20, so that the tray 20 is accurately stopped in the open position.

[0061] The structures of the stop portion 61 and the stop mating portion 54 can be selected according to actual needs. For example, the stop portion 61 can be a step formed on the display stand body, and the stop mating portion 54 can be the bottom of the tray 20. When the tray 20 is rotated to the open position, the bottom of the tray 20 abuts against the step, thus limiting the tray 20. In some optional embodiments, the rotating shaft 50 is provided with the stop mating portion 54, and the rotating shaft bracket 60 is provided with the stop portion 61. When the tray 20 is rotated to the open position, the stop mating portion 54 and the stop portion 61 are engaged in a limiting fit. This design is beneficial for integrating the stop portion 61 and the stop mating portion 54 onto the rotating shaft bracket 60 and the rotating shaft 50, which simplifies the tray 20 and the display stand body. In this embodiment, the stop mating portion 54 is provided on both the second gasket 522 and the support portion 51, while the stop portion 61 is provided on both sides of the rotating shaft bracket 60.

[0062] In this embodiment, the stop part 61, the stop mating part 54, the support part 51, the torsion spring, and the compression spring 52 are all integrated on the rotating shaft part 50 and the rotating shaft bracket 60, which allows the stop part 61, the stop mating part 54, the support part 51, the torsion spring, the compression spring 52, the rotating shaft part 50, and the rotating shaft bracket 60 to form a modular structure, which facilitates production and assembly.

[0063] In addition, in this embodiment, due to the buffering effect of the elastic buffer structure 40, the stop part 61 and the stop mating part 54 are less likely to collide violently when the tray reaches the open position, thus improving the structural stability.

[0064] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A video display stand system, characterized in that, include: The main body of the booth, the support plate, the electromagnet assembly, and the control system; The tray is rotatably engaged with the main body of the booth, and the tray can rotate relative to the main body of the booth to a closed position and an open position; The electromagnet assembly is mounted on the display stand body. When the tray rotates to the closed position, the electromagnet assembly magnetically engages with the tray. The control system is connected to the electromagnet assembly. When the electromagnet assembly receives a control signal from the control system, the electromagnet assembly releases its magnetic attraction to the tray, and the tray moves toward the open position under its own gravity.

2. The video display stand system according to claim 1, characterized in that: The main body of the exhibition stand is provided with an elastic ejection structure. When the tray is rotated to the closed position, the tray presses against the elastic ejection structure to cause the elastic ejection structure to undergo elastic deformation.

3. The video display stand system according to claim 2, characterized in that: The elastic ejection structure includes an ejector pin and an ejection spring. The ejection spring is disposed on the main body of the display stand, the ejector pin is movably disposed on the main body of the display stand, and the ejector pin is connected to the ejection spring. When the tray is rotated to the closed position, the tray presses against the ejector pin to compress or stretch the ejector spring.

4. The video display stand system according to claim 1, characterized in that: The electromagnet assembly includes a circuit board and several electromagnets. The circuit board and the electromagnets are disposed on the main body of the exhibition stand. The circuit board is provided with conductive spring pins, which press against the electromagnets. The electromagnet is magnetically attracted to the tray.

5. A video display stand system according to claim 1, characterized in that: The tray is provided with several magnetic attraction components. When the tray is rotated to the closed position, the electromagnet assembly and the magnetic attraction components are magnetically attracted to each other.

6. A video display stand system according to any one of claims 1 to 5, characterized in that, Also includes: An elastic buffer structure is provided, which is connected to the display stand body and the tray respectively. When the tray rotates from the closed position to the open position, the display stand body and the tray drive the elastic buffer structure to produce elastic deformation.

7. A video display stand system according to claim 6, characterized in that, It also includes rotating shafts and shaft supports that rotate and cooperate with each other; The pivot component is disposed on the display stand body, and the pivot bracket is disposed on the tray, or the pivot component is disposed on the tray, and the pivot bracket is disposed on the display stand body; The elastic buffer structure is a torsion spring, which is sleeved on the outside of the rotating shaft. One end of the torsion spring is connected to the rotating shaft bracket, and the other end of the torsion spring is connected to the rotating shaft. When the tray rotates from the closed position to the open position, the rotating shaft bracket and the rotating shaft drive the torsion spring to torsion and deform.

8. A video display stand system according to any one of claims 1 to 5, characterized in that, It also includes rotating shafts and shaft supports that rotate and cooperate with each other; The pivot component is disposed on the display stand body, and the pivot bracket is disposed on the tray, or the pivot component is disposed on the tray, and the pivot bracket is disposed on the display stand body; The rotating shaft is provided with a support and a compression spring. The support, the rotating shaft bracket and the compression spring are arranged sequentially along the axial direction of the rotating shaft. The compression spring presses the rotating shaft bracket against the support.

9. A video display stand system according to claim 8, characterized in that: The end of the rotating shaft is also provided with a threaded part. One end of the compression spring abuts against the threaded part through a first washer, and the other end of the compression spring abuts against the rotating shaft bracket through a second washer.

10. A video display stand system according to any one of claims 1 to 5, characterized in that: The display stand body is provided with a stop part, and the tray is provided with a stop mating part. When the tray is rotated to the open position, the stop mating part and the stop part are limited to engage.

11. A video display stand system according to any one of claims 1 to 5, characterized in that: The control system further includes a control module and a terminal device. The control module is connected to the terminal device. The control module is used to send the control signal. When the electromagnet assembly receives the control signal and releases its magnetic attraction with the tray, the terminal device synchronously receives the control signal and responds to the corresponding function.

12. A video display stand system according to any one of claims 1 to 5, characterized in that: It also includes a one-button control button, which is signal-connected to the control system, and the control system responds to user operations through the one-button control button.

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