Equipment and method for switching conference video signals

Abstract

The invention discloses equipment and a method for switching conference video signals. HDMI interfaces are arranged on the left side and the right side of the front end of the screen projector, signal lines are arranged on the left side and the right side of the screen projector, a fixing box is fixedly connected to the top of the screen projector, and clamping mechanisms are fixedly connected to the left side and the right side of the inner wall of the fixing box. And the clamping mechanism comprises connecting plates, a cross rod, a sliding plate, a connecting block and a C-shaped buckle, and the connecting plates are fixedly connected to the left side and the right side of the inner wall of the fixing box. Through the arrangement of the clamping mechanism, the sliding plates can get close to or away from each other under the action of external force, when the sliding plates move towards the inner side along the surface of the cross rod and drive the connecting blocks, the connecting blocks move towards the inner side to drive the C-shaped buckles to move along with the sliding plates, and the C-shaped buckles get close to an HDMI interface to clamp and fix a plugged cable connector; and the cable is prevented from being separated from the HDMI interface to interrupt video signal output.

Description

Technical Field

[0001] The present invention relates to the technical field of video signal switching, and specifically to a device and method for switching conference video signals. Background Art

[0002] Video signals such as HDMI, SDI, HDBaseT, optical fiber, etc. can receive video signals from different devices and in different formats, and perform flexible switching and transmission. They are suitable for conference environments with diverse device types and complex signal formats, and can meet the need to switch various video source signals to different display terminals.

[0003] In the comparative case, the patent application number is CN221509674U. The present utility model discloses a video capture card and a device for video signal capture. Among them, the video capture card includes a first main board and a video capture unit. The technical solution of the present utility model connects the first main board and the second main board, and connects the MSATA interface and the MSATA slot, so that the video signal captured by the video capture unit is converted into a USB signal. Through the USB protocol, the converted signal is input into the device main board. After installing the MSATA video capture card, the device is transformed into a device capable of capturing video signals, avoiding the influence on the appearance of the device by externally hanging a USB video capture card, and inserting the video capture card on the device main board, avoiding the modification of the device main board and reducing costs and improving efficiency.

[0004] However, in the implementation of related technologies, it is found that the above-mentioned video capture card and video signal capture device have the following problems. In the comparative case, by connecting the first main board and the second main board, and connecting the MSATA interface and the MSATA slot, the video signal captured by the video capture unit is converted into a USB signal. Through the USB protocol, the converted signal is input into the device main board. After installing the MSATA video capture card, the device is transformed into a device capable of capturing video signals, avoiding the influence on the appearance of the device by externally hanging a USB video capture card. Existing video conferences generally consist of a sending end and a receiving end. The sending end can be connected to video signal source devices such as computers and mobile phones, and the receiving end is connected to a display device. The video signal is transmitted from the sending end to the receiving end through a wireless signal to achieve wireless screen mirroring and signal switching. The sending end uses two methods to connect and project the data signal. One is to establish a local area network through Bluetooth or Wi-Fi to achieve signal output synchronization, and the other is to plug in an HDMI high-definition cable to output the video signal wired. Among them, the HDMI high-definition cable is easily pulled at the interface and separated from the terminal video signal, reducing the safety of using the video signal device.

[0005] Therefore, it is necessary to design and transform the video signal device to effectively prevent its video conferencing system, which generally consists of a sending end and a receiving end. The sending end can be connected to video signal source devices such as computers and mobile phones, and the receiving end is connected to a display device. The video signal is transmitted from the sending end to the receiving end through a wireless signal to achieve wireless screen mirroring and signal switching. The sending end has two ways to connect and project the data signal. One is to establish a local area network through Bluetooth or Wi-Fi to achieve signal output synchronization, and the other is to plug in an HDMI high-definition cable to output the video signal. However, when the HDMI high-definition cable is plugged into the interface, it is easily pulled and disconnected from the terminal video signal. Summary of the Invention

[0006] To solve the problems raised in the above background technology, the purpose of the present invention is to provide a device and method for switching conference video signals, which has the advantage of secure connection. The video conferencing system generally consists of a sending end and a receiving end. The sending end can be connected to video signal source devices such as computers and mobile phones, and the receiving end is connected to a display device. The video signal is transmitted from the sending end to the receiving end through a wireless signal to achieve wireless screen mirroring and signal switching. The sending end has two ways to connect and project the data signal. One is to establish a local area network through Bluetooth or Wi-Fi to achieve signal output synchronization, and the other is to plug in an HDMI high-definition cable to output the video signal. However, when the HDMI high-definition cable is plugged into the interface, it is easily pulled and disconnected from the terminal video signal.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: A device and method for switching conference video signals, including; A screen mirroring device, on the left and right sides of the front end of the screen mirroring device, there are HDMI interfaces respectively. On the left and right sides of the screen mirroring device, there are signal lines respectively. On the top of the screen mirroring device, there is a fixed box fixedly connected. On the left and right sides of the inner wall of the fixed box, there are clamping mechanisms fixedly connected respectively; The clamping mechanism includes a connecting plate, a cross bar, a sliding plate, a connecting block and a C-shaped buckle. On the left and right sides of the inner wall of the fixed box, there are connecting plates fixedly connected respectively. At the front and back ends of the inner side of the connecting plate, there are cross bars fixedly connected horizontally respectively. On the left and right sides of the surface of the cross bar, there are sliding plates slidingly connected respectively. At the front end of the sliding plate, there is a connecting block fixedly connected. The front end of the connecting block passes through the front end of the fixed box and is fixedly connected with a C-shaped buckle. On the inner side of the sliding plate, there is a connecting mechanism fixedly connected.

[0008] Preferably, the connecting mechanism includes a rectangular plate, a rod, an extension rod and a fixing plate. On the inner side of the sliding plate, there is a rectangular plate fixedly connected. In the inner cavity of the rectangular plate, there is a rod slidingly connected. The front end and the back end of the rod pass through the front end and the back end of the rectangular plate respectively and are fixedly connected with extension rods. On the top of the extension rod, there is a fixing plate fixedly connected. On the left and right sides of the top of the fixed box, there are driving mechanisms fixedly connected respectively.

[0009] Preferably in the present invention, the driving mechanism includes a screw sleeve, a screw rod and a turntable. Screws sleeves are fixedly connected to both the left and right sides of the top of the fixed box. The inner cavity of the screw sleeve is movably connected to the screw rod through a thread. The bottom of the screw rod penetrates to the inside of the fixed box and is movably connected to the top of the fixing plate through a bearing. The top of the screw rod penetrates to the top of the fixed box and is fixedly connected to the turntable. A balance component is horizontally fixedly connected to the back end of the inner cavity of the fixed box.

[0010] Preferably in the present invention, the balance component includes a frame and a slider. The frame is horizontally fixedly connected to the back end of the inner wall of the fixed box. Sliders are slidably connected to both the left and right sides of the front end of the frame. The front ends of the sliders are fixedly connected to the back end of the slide plate. Auxiliary components are fixedly connected to the four corners of the bottom of the screen mirroring device.

[0011] Preferably in the present invention, the auxiliary component includes a C-shaped magnet and a rubber sticker. C-shaped magnets are fixedly connected to the four corners of the bottom of the screen mirroring device. The bottom of the C-shaped magnet is fixedly adhered with a rubber sticker.

[0012] Preferably in the present invention, a rubber pad is fixedly adhered to the inner side of the C-shaped buckle, and the rubber pad is used in cooperation with the C-shaped buckle.

[0013] Preferably in the present invention, inclined slots are provided on the surface of the rectangular plate corresponding to the positions of the rod bars, and the inclined slots are used in cooperation with the rod bars.

[0014] Preferably in the present invention, slide rails are provided on the surface of the frame corresponding to the positions of the sliders, and the slide rails are used in cooperation with the sliders.

[0015] Preferably in the present invention, the following steps are included; S1; The user places the screen mirroring device near the display screen by hand and turns it on. The screen mirroring device outputs a sending end signal through a signal line. The sending end can be connected to video signal source devices such as a computer and a mobile phone. The receiving end is connected to the display device. The video signal is transmitted from the sending end to the receiving end through a wireless signal to achieve wireless screen mirroring and signal switching. The user can also switch the video signal of other devices to the screen of this device for display through the wireless screen mirroring function of the device itself. In addition, a high-definition cable can be inserted and the other end of the cable is connected to the display screen at the HDMI interface to achieve wired video signal output. At this time, operate the mechanical component to make the slide plate move closer or farther away under an external force. When the slide plate moves inward along the surface of the cross bar and drives the connecting block, the connecting block moves inward and drives the C-shaped buckle to move accordingly. The C-shaped buckle approaches the HDMI interface to clamp and fix the inserted cable connector, preventing the cable from detaching from the HDMI interface and interrupting the video signal output.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the setting of the clamping mechanism in the present invention, the sliding plate can move closer to or away from under an external force. When the sliding plate moves inward along the surface of the cross bar and drives the connecting block, the connecting block moves inward and drives the C-shaped buckle to move accordingly. The C-shaped buckle approaches the HDMI interface to clamp and fix the inserted cable connector, preventing the cable from detaching from the HDMI interface and interrupting the video signal output.

[0017] 2. Through the setting of the connecting mechanism in the present invention, the fixed plate can move up and down under an external force, thereby driving the extension rod to move accordingly. When the extension rod moves upward, it drives the rod to move accordingly. When the rod moves, it forces the rectangular plate to move closer inward, and the movement of the rectangular plate drives the sliding plate to move accordingly, completing the mechanical power transmission.

[0018] 3. Through the setting of the driving mechanism in the present invention, the turntable can be rotated clockwise by hand. The rotation of the turntable drives the screw rod to rotate accordingly. While the screw rod rotates and cooperates with the rotation of the nut sleeve, it screws out downward. The downward movement of the screw rod pushes the fixed plate to move accordingly, completing the power transmission. Similarly, when the turntable is rotated counterclockwise, the rotation of the turntable drives the screw rod to screw out upward, thereby driving the fixed plate upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention; Figure 2 of the present invention Figure 1 is a three-dimensional view of the structure of the fixed box in the present invention; Figure 3 of the present invention Figure 2 is a three-dimensional view of the structure of the connecting plate, cross bar and sliding plate in the present invention; Figure 4 of the present invention Figure 2 is a three-dimensional view of the structure of the frame and slider in the present invention; Figure 5 of the present invention Figure 2 is a three-dimensional view of the structure of the rectangular plate, rod and extension rod in the present invention; Figure 6 of the present invention Figure 1 is a three-dimensional view of the structure of the connecting block and C-shaped buckle in the present invention; Figure 7 of the present invention Figure 1 is a three-dimensional view of the structure of the C-shaped magnet and rubber sticker in the present invention; Figure 8 of the present invention Figure 2 is a three-dimensional view of the structure of the nut sleeve, screw rod and turntable in the present invention.

[0020] In the figure: 1, a screen mirroring device; 2, an HDMI interface; 3, a signal line; 4, a fixing box; 5, a clamping mechanism; 51, a connecting plate; 52, a cross bar; 53, a sliding plate; 54, a connecting block; 55, a C-shaped buckle; 6, a connecting mechanism; 61, a rectangular plate; 62, a rod; 63, an extension rod; 64, a fixing plate; 7, a driving mechanism; 71, a screw sleeve; 72, a screw rod; 73, a turntable; 8, a balancing component; 81, a frame; 82, a slider; 9, an auxiliary component; 91, a C-shaped magnet; 92, a rubber sticker; 10, a rubber pad; 11, an inclined groove; 12, a slide rail. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 to 8 shown, a device and method for switching conference video signals provided by the present invention include; A screen mirroring device 1, HDMI interfaces 2 are provided on both the left and right sides of the front end of the screen mirroring device 1, signal lines 3 are provided on both the left and right sides of the screen mirroring device 1, a fixing box 4 is fixedly connected to the top of the screen mirroring device 1, and clamping mechanisms 5 are fixedly connected to both the left and right sides of the inner wall of the fixing box 4; The clamping mechanism 5 includes a connecting plate 51, a cross bar 52, a sliding plate 53, a connecting block 54 and a C-shaped buckle 55. Connecting plates 51 are fixedly connected to both the left and right sides of the inner wall of the fixing box 4. Cross bars 52 are horizontally fixedly connected to both the front end and the back end of the inner side of the connecting plate 51. Sliding plates 53 are slidably connected to both the left and right sides of the surface of the cross bar 52. A connecting block 54 is fixedly connected to the front end of the sliding plate 53. The front end of the connecting block 54 penetrates through the front end of the fixing box 4 and is fixedly connected to a C-shaped buckle 55. A connecting mechanism 6 is fixedly connected to the inner side of the sliding plate 53.

[0023] Refer to Figure 5 , the connecting mechanism 6 includes a rectangular plate 61, a rod 62, an extension rod 63 and a fixing plate 64. A rectangular plate 61 is fixedly connected to the inner side of the sliding plate 53. A rod 62 is slidably connected to the inner cavity of the rectangular plate 61. The front end and the back end of the rod 62 penetrate through the front end and the back end of the rectangular plate 61 and are fixedly connected to an extension rod 63. A fixing plate 64 is fixedly connected to the top of the extension rod 63. Driving mechanisms 7 are fixedly connected to both the left and right sides of the top of the fixing box 4.

[0024] As a technical optimization solution of the present invention, through the setting of the connecting mechanism 6, the fixing plate 64 can move up and down under an external force, thereby driving the extension rod 63 to move accordingly. When the extension rod 63 moves upward, it drives the rod 62 to move accordingly, and when the rod 62 moves, it forces the rectangular plate 61 to move closer inward. The movement of the rectangular plate 61 drives the sliding plate 53 to move accordingly, completing the mechanical power transmission.

[0025] Reference Figure 3 , the driving mechanism 7 includes a screw sleeve 71, a screw rod 72 and a turntable 73. The left and right sides of the top of the fixed box 4 are fixedly connected with screw sleeves 71. The inner cavity of the screw sleeve 71 is movably connected with the screw rod 72 through a thread. The bottom of the screw rod 72 penetrates to the inside of the fixed box 4 and is movably connected with the top of the fixing plate 64 through a bearing. The top of the screw rod 72 penetrates to the top of the fixed box 4 and is fixedly connected with a turntable 73. The back end of the inner cavity of the fixed box 4 is horizontally fixedly connected with a balance assembly 8.

[0026] As a technical optimization solution of the present invention, through the setting of the driving mechanism 7, the turntable 73 can be held and rotated clockwise. The rotation of the turntable 73 drives the screw rod 72 to rotate accordingly. While the screw rod 72 rotates and cooperates with the rotation of the screw sleeve 71, it screws out downward. The downward movement of the screw rod 72 pushes the fixing plate 64 to move accordingly, completing the power transmission. Similarly, when the turntable 73 is rotated counterclockwise, the turntable 73 rotates to drive the screw rod 72 to screw out upward, thereby driving the fixing plate 64 upward.

[0027] Reference Figure 4 , the balance assembly 8 includes a frame 81 and a slider 82. The back end of the inner wall of the fixed box 4 is horizontally fixedly connected with a frame 81. The left and right sides of the front end of the frame 81 are both slidably connected with sliders 82. The front ends of the sliders 82 are fixedly connected with the back end of the sliding plate 53. The four corners of the bottom of the projection device 1 are all fixedly connected with an auxiliary assembly 9.

[0028] As a technical optimization solution of the present invention, through the setting of the balance assembly 8, the slider 82 can move left and right inside the frame 81, and at the same time play a role in limiting, avoiding the phenomenon of the slider 82 tilting during the movement.

[0029] Reference Figure 7 , the auxiliary assembly 9 includes a C-shaped magnet 91 and a rubber sticker 92. The four corners of the bottom of the projection device 1 are all fixedly connected with C-shaped magnets 91, and the bottom of the C-shaped magnet 91 is fixedly adhered with a rubber sticker 92.

[0030] As a technical optimization solution of the present invention, through the setting of the auxiliary assembly 9, the C-shaped magnet 91 can be magnetically fixed to the metal, and at the same time, the rubber sticker 92 is used to increase the frictional resistance of the contact surface, avoiding the phenomenon of the projection device 1 slipping on the inclined surface.

[0031] Reference Figure 6, a rubber pad 10 is fixedly bonded to the inner side of the C-shaped buckle 55, and the rubber pad 10 is used in cooperation with the C-shaped buckle 55.

[0032] As a technical optimization scheme of the present invention, through the arrangement of the rubber pad 10, it can assist the C-shaped buckle 55 to work, and at the same time play a protective role, avoiding the phenomenon that the C-shaped buckle 55 directly contacts the joint to cause scratch and wear.

[0033] Reference Figure 5 , an inclined groove 11 is provided on the surface of the rectangular plate 61 corresponding to the position of the rod 62, and the inclined groove 11 is used in cooperation with the rod 62.

[0034] As a technical optimization scheme of the present invention, through the arrangement of the inclined groove 11, it can assist the rod 62 to work, and at the same time play a limiting role, avoiding the situation that the rod 62 cannot force the rectangular plate 61 to move during the movement.

[0035] Reference Figure 4 , a slide rail 12 is provided on the surface of the frame 81 corresponding to the position of the slider 82, and the slide rail 12 is used in cooperation with the slider 82.

[0036] As a technical optimization scheme of the present invention, through the arrangement of the slide rail 12, it can assist the slider 82 to work, and at the same time play a limiting role, avoiding the phenomenon that the slider 82 tilts during the movement.

[0037] Reference Figure 2 , including the following steps; S1; The user places the handheld screen mirroring device 1 near the display screen and turns it on. The screen mirroring device 1 outputs a transmitter signal through the signal line 3. The transmitter can be connected to video signal source devices such as a computer and a mobile phone. The receiver is connected to the display device. The video signal is transmitted from the transmitter to the receiver through the wireless signal to achieve wireless screen mirroring and signal switching. The user can also use the wireless screen mirroring function of the device itself to switch the video signal of other devices to the screen of this device for display. In addition, a high-definition cable can be inserted at the HDMI interface 2 and the other end of the cable is connected to the display screen to achieve wired video signal output. At this time, operate the mechanical component to make the slide plate 53 move closer or farther under an external force. When the slide plate 53 moves inward along the surface of the cross bar 52 and drives the connecting block 54, the connecting block 54 moves inward to drive the C-shaped buckle 55 to move accordingly. The C-shaped buckle 55 approaches the HDMI interface 2 to clamp and fix the inserted cable joint, preventing the cable from detaching from the HDMI interface 2 and interrupting the video signal output.

[0038] Working principle and usage process of the present invention: When in use, hold the screen mirroring device 1 and place it near the display screen. Fix it magnetically with the C-shaped magnet 91 and turn it on. The screen mirroring device 1 outputs a transmitter signal through the signal line 3. The transmitter can be connected to video signal source devices such as computers and mobile phones, and the receiver is connected to the display device. The video signal is transmitted from the transmitter to the receiver through a wireless signal to achieve wireless screen mirroring and signal switching. Users can also use the wireless screen mirroring function of the device itself to switch the video signal of other devices to the screen of this device for display. In addition, a high-definition cable can be inserted at the HDMI interface 2, and the other end of the cable is connected to the display screen to achieve wired video signal output. When the high-definition interface is inserted, manually rotate the turntable 73. The rotation of the turntable 73 drives the screw rod 72 to rotate counterclockwise. The rotation of the screw rod 72 cooperates with the nut sleeve 71 to screw out upward. The screw rod 72 screws out upward and pushes the fixing plate 64 to move upward. The upward movement of the fixing plate 64 drives the extension rod 63 and the rod 62 to move synchronously. The rod 62 cooperates with the inclined slot 11 to force the rectangular plate 61 to move closer to the inside. The inward movement of the rectangular plate 61 drives the slide plate 53 to move accordingly. The slide plate 53 stably moves along the surface of the cross bar 52. When the slide plate 53 moves, it cooperates with the slider 82 to move inside the slide rail 12 of the frame 81. Then the movement of the slide plate 53 drives the connecting block 54 and the C-shaped buckle 55 to move synchronously. The two C-shaped buckles 55 move closer to each other to clamp and fix the cable connector, preventing it from detaching and ensuring high-definition video signal output.

[0039] In summary: For the device used for conference video signal switching, through the cooperation of the screen mirroring device 1, HDMI interface 2, signal line 3, fixed box 4, clamping mechanism 5, connecting plate 51, cross bar 52, slide plate 53, connecting block 54, C-shaped buckle 55 and connecting mechanism 6, during operation, the slide plate 53 moves closer or farther away under the action of an external force. When the slide plate 53 moves inward along the surface of the cross bar 52 and drives the connecting block 54, the inward movement of the connecting block 54 drives the C-shaped buckle 55 to move accordingly. The C-shaped buckle 55 approaches the HDMI interface 2 to clamp and fix the inserted cable connector, preventing the cable from detaching from the HDMI interface 2 and interrupting the video signal output. It solves the problem that existing video conferences generally consist of a transmitter and a receiver. The transmitter can be connected to video signal source devices such as computers and mobile phones, and the receiver is connected to the display device. The video signal is transmitted from the transmitter to the receiver through a wireless signal to achieve wireless screen mirroring and signal switching. The transmitter has two ways to connect and project the data signal. One is to establish a local area network through Bluetooth or Wi-Fi to achieve signal output synchronization, and the other is to output the video signal wired through the insertion of an HDMI high-definition cable. The HDMI high-definition cable is easily pulled and detached from the interface, resulting in the interruption of the terminal video signal.

[0040] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0041] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for switching conference video signals, comprising: A screen projector (1), wherein HDMI interfaces (2) are arranged on the left and right sides of the front end of the screen projector (1), signal lines (3) are arranged on the left and right sides of the screen projector (1), a fixing box (4) is fixedly connected to the top of the screen projector (1), and a clamping mechanism (5) is fixedly connected to the left and right sides of the inner wall of the fixing box (4); The invention is characterized in that the clamping mechanism (5) comprises a connecting plate (51), a cross bar (52), a slide plate (53), a connecting block (54) and a C-shaped buckle (55); the left and right sides of the inner wall of the fixing box (4) are fixedly connected to the connecting plate (51); the front end and the back end of the inner side of the connecting plate (51) are transversely fixedly connected to the cross bar (52); the left and right sides of the surface of the cross bar (52) are slidably connected to the slide plate (53); the front end of the slide plate (53) is fixedly connected to the connecting block (54); the front end of the connecting block (54) passes through the front end of the fixing box (4) and is fixedly connected to the C-shaped buckle (55); and the inner side of the slide plate (53) is fixedly connected to the connecting mechanism (6).

2. The device for conference video signal switching according to claim 1, characterized in that: The connecting mechanism (6) comprises a rectangular plate (61), a rod (62), an extension rod (63) and a fixed plate (64); the inner side of the slide plate (53) is fixedly connected to the rectangular plate (61); the inner cavity of the rectangular plate (61) is slidably connected to the rod (62); the front end and the back end of the rod (62) both pass through the front end and the back end of the rectangular plate (61) and are fixedly connected to the extension rod (63); the top of the extension rod (63) is fixedly connected to the fixed plate (64); and the left and right sides of the top of the fixed box (4) are fixedly connected to the driving mechanism (7).

3. The device for conference video signal switching according to claim 2, characterized in that: The driving mechanism (7) comprises a screw sleeve (71), a screw rod (72) and a rotating disk (73); the screw sleeve (71) is fixedly connected to the left and right sides of the top of the fixed box (4); the inner cavity of the screw sleeve (71) is movably connected to the screw rod (72) via a thread; the bottom of the screw rod (72) penetrates into the interior of the fixed box (4) and is movably connected to the top of the fixed plate (64) via a bearing; the top of the screw rod (72) penetrates into the top of the fixed box (4) and is fixedly connected to the rotating disk (73); and the back end of the inner cavity of the fixed box (4) is transversely fixedly connected to a balancing component (8).

4. The device for conference video signal switching according to claim 3, characterized in that: The balancing component (8) comprises a frame (81) and a slider (82); the frame (81) is laterally fixedly connected to the back end of the inner wall of the fixed box (4); the left and right sides of the front end of the frame (81) are slidably connected to the slider (82); the front end of the slider (82) is fixedly connected to the back end of the slide plate (53); and the four corners of the bottom of the projector (1) are fixedly connected to the auxiliary components (9).

5. The device for conference video signal switching according to claim 1, characterized in that: The auxiliary component (9) comprises a C-shaped magnet (91) and a rubber patch (92); the four corners of the bottom of the projection device (1) are fixedly connected to the C-shaped magnet (91); and the bottom of the C-shaped magnet (91) is fixedly bonded to the rubber patch (92).

6. The device for conference video signal switching according to claim 1, characterized in that: A rubber pad (10) is fixedly bonded to the inner side of the C-shaped buckle (55), and the rubber pad (10) is used in conjunction with the C-shaped buckle (55).

7. The device for conference video signal switching according to claim 2, characterized in that: An oblique groove (11) is provided on the surface of the rectangular plate (61) at a position corresponding to the rod (62), and the oblique groove (11) is used in conjunction with the rod (62).

8. The device for conference video signal switching according to claim 4, characterized in that: A slide rail (12) is provided on the surface of the frame (81) at a position corresponding to the slide block (82), and the slide rail (12) is used in conjunction with the slide block (82).

9. The method for using the device for conference video signal switching according to claim 1, characterized in that: The steps include: S1; the user places the handheld screen projector (1) near the display screen and turns it on. The screen projector (1) outputs a signal from a transmitting end through a signal line (3). The transmitting end can be connected to a video signal source device such as a computer or a mobile phone. The receiving end is connected to a display device. The video signal is transmitted from the transmitting end to the receiving end through a wireless signal to achieve wireless screen projection and signal switching. The user can also use the device's own wireless screen projection function to switch the video signal of other devices to the screen of the device for display. In addition, a high-definition cable can be inserted into the HDMI interface (2) and the other end of the cable can be connected to the display screen to achieve wired video signal output. At this time, the mechanical component is operated to make the slide plate (53) approach or move away under external force. When the slide plate (53) moves inward along the surface of the crossbar (52) and drives the connecting block (54), the connecting block (54) moves inward and drives the C-shaped buckle (55) to move with it. The C-shaped buckle (55) is close to the HDMI interface (2) to clamp and fix the plugged cable connector to prevent the cable from being separated from the HDMI interface (2) and interrupting the video signal output.

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