Modular tiled display for large conference rooms

Abstract

The application discloses a modular splicing display screen for large meeting rooms, and relates to the field of splicing display screens.The modular splicing display screen for large meeting rooms comprises a splicing screen, which is fixed on the ground through a supporting structure, and two mobile mechanisms connected to the two sides of the splicing screen, wherein the two groups of mobile mechanisms slide up and down on the outside of the supporting structure of the splicing screen, and a coiled protective film is connected between the two groups of mobile mechanisms.The mobile mechanism drives the protective film to move on the side of the splicing screen.The application can also clean the protective film through the mobile mechanism and a cleaning mechanism.When the protective film is cleaned, the rotating scraper, the mounting frame and the splicing screen are aligned by rotating the motor, the attached protective film is scraped and cleaned through the rotating scraper, the air is heated through the heating rod, the heated air is blown to the inside of the protective film through the air pump, the protective film is prevented from adhering to the outside of the cleaning mechanism, and the cleaning effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of spliced ​​display screens, in particular to a modular spliced ​​display screen used in a large conference room. Background Art

[0002] LCD splicing display is a versatile large-screen function that can realize screen splitting for single-screen display or multi-screen display according to different usage requirements. It can be divided into single-screen split display, single-screen independent display, arbitrary combination display, full-screen LCD splicing, double-splicing LCD splicing screen and vertical screen display. The image border can be optionally compensated or covered, and it supports roaming, zooming and stretching of digital signals and cross-screen display. It also supports the setting and operation of various display plans and real-time processing of full HD signals. Due to its free combination characteristics, the splicing display can be applied to different environments, especially in large conference rooms where multiple people are present and it is necessary to build a display that meets the size requirements.

[0003] During the assembly process of existing splicing display screens, a metal frame is usually used to limit and fix the modular display screens, and then the display screen is connected to the power supply and signal connector so that the splicing screen can be used normally. During the splicing process, the spacing (gap) between each group of splicing screens needs to be adjusted and controlled to avoid large gaps between each group of display screens, resulting in poor display effect of the splicing screen. After the display screen is assembled, it is also necessary to cover the surface of the splicing screen with a protective film to reduce damage to the display screen by the external environment. However, due to the characteristics of the splicing screen (large and composed of multiple groups of screens), two methods are usually used during the lamination process. One is to use multiple groups of small protective films to laminate each group of splicing screens in turn. This method has many repetitive steps and is too cumbersome. In addition, the lamination process cannot ensure 100% accuracy. After lamination, the corners between the groups of films can easily interfere with each other, affecting the use of the splicing screen. Another method is to use an entire large protective film to directly protect the entire splicing screen. However, this method has a large lamination area, which makes the lamination process more difficult, and it is difficult to expel bubbles from between the films during lamination. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a modular splicing display screen for use in large conference rooms to solve the technical problem that existing display screens are inconvenient to coat.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a modular splicing display screen for use in a large conference room, comprising a splicing screen, which is fixed to the ground by a support structure, wherein two sides of the splicing screen are respectively connected to a moving mechanism, and two groups of the moving mechanisms slide up and down on the outside of the support structure of the splicing screen, a rolled protective film is connected between the two groups of moving mechanisms, and the moving mechanism drives the protective film to move along the side of the splicing screen, and an extrusion plate is connected to the interior of each group of moving mechanisms, and the moving mechanism squeezes the protective film to adhere to the outside of the splicing screen through the extrusion plate, and a cleaning mechanism is installed between the two groups of moving mechanisms, the cleaning mechanism is located above the protective film, the cleaning mechanism is connected to cleaning cotton near the splicing screen, and the cleaning mechanism is connected to a rotating scraper on the side near the protective film, a rotating motor is connected to the side of each group of moving mechanisms, and the output end of the rotating motor drives an air pump to rotate, the cleaning cotton is provided inside the cleaning mechanism, and the two ends of the cleaning cotton are respectively aligned with the cleaning cotton and the rotating scraper, and a breathable net is provided on the side of the rotating scraper near the splicing screen, and a heating rod is connected inside the cleaning mechanism above the rotating scraper.

[0006] By adopting the above technical solution, the protective film can be easily applied, reducing errors in manual operation, and the spliced ​​screen can be cleaned by the cleaning mechanism, reducing the generation of bubbles and other impurities during the application process.

[0007] The present invention is further configured such that a mounting frame is connected to the back of the splicing screen, a bottom end of the mounting frame is connected to a base, both sides of the splicing screen are connected to side baffles, and guide rails and slots are provided on the outer sides of the side baffles.

[0008] By adopting the above technical solution, the spliced ​​screen can be conveniently fixed.

[0009] The present invention is further configured such that a driving motor is provided on the side of each group of the moving mechanisms, and the output end of the driving motor is connected to a transmission tooth, and the driving motor is engaged with the guide rail through the transmission tooth. The inner side of the moving mechanism is also connected to a power-connecting slider, and the power-connecting slider slides in the slot, and a conductive sheet connected to an external power supply is provided in the slot.

[0010] By adopting the above technical solution, the mobile mechanism drives other mechanisms to move to achieve film application, and at the same time, the mobile mechanism is connected to the external power supply through the power-connecting slider to enable the mechanism to operate normally.

[0011] The present invention is further configured such that a fixed frame is connected to the side of each group of the moving mechanisms, a spring rod is connected to the inside of the fixed frame, and a handle is connected to the end of the spring rod. The rolled protective film is connected to the inside of the moving mechanism by rotating the spring rod, and the limit on the rolled protective film can be released by pulling the spring rod to move by the handle.

[0012] By adopting the above technical solution, the rolled protective film can be easily disassembled and replaced.

[0013] The present invention is further configured such that a fixing plate is fixedly connected to the side of each group of moving mechanisms, a side of the fixing plate close to the extrusion plate is connected to a spring, and the fixing plate is movably connected to the extrusion plate through the spring.

[0014] By adopting the above technical solution, the extrusion plate can be extruded and pushed by the spring, which facilitates the extrusion of protective films of different thicknesses.

[0015] The present invention is further configured such that the interior of the cleaning mechanism is hollow, and a partition is provided in the hollow portion of the cleaning mechanism, and multiple groups of air pumps are fixed on the partition. The air pumps can run forward and backward to drive the air flow between the cleaning cotton and the breathable net.

[0016] By adopting the above technical solution, the airflow can flow conveniently in the cleaning mechanism, thereby achieving cleaning of the spliced ​​screen.

[0017] The present invention is further configured such that an air jet slot is provided between the rotating scraper and the cleaning mechanism. When the rotating scraper does not rotate, the air jet slot is closed and the air flow can only flow through the air permeable net. When the rotating scraper rotates, the air jet slot is opened and the air flow is discharged through the air jet slot.

[0018] By adopting the above technical solution, the air flow can be conveniently ejected through the air jet slot to clean the impurities under the shovel.

[0019] The present invention is further configured such that the rotating scraper is rotatably connected to the side of the cleaning mechanism. When the protective film is attached, the rotating scraper does not rotate. At this time, the breathable mesh is aligned with the outer wall of the splicing screen, and the air flow passes through the breathable mesh to clean the splicing screen. When the protective film is removed, the rotating scraper rotates, and the end of the rotating scraper scrapes off the protective film. At the same time, the heating rod is started, and the air flow is heated by the heating rod and blown toward the protective film under the scraping.

[0020] By adopting the above technical solution, the heated airflow can reduce the adhesion of the protective film under the shovel to the outside of the cleaning mechanism.

[0021] In summary, the present invention mainly has the following beneficial effects:

[0022] 1. The present invention is provided with a moving mechanism and a cleaning mechanism, which can drive the protective film to move on the outside of the splicing screen through the moving mechanism, so that the protective film is attached to the outside of the splicing screen, and the protective film is squeezed by the extrusion plate to make the protective film tightly attached to the outside of the splicing screen, thereby improving the bonding effect. In the bonding process, the surface of the splicing screen is cleaned by the cleaning mechanism to reduce the adhesion of impurities between the protective film and the splicing screen, thereby improving the adhesion effect of the protective film.

[0023] 2. The present invention also has a cleaning mechanism, which can suck air from the connection position between the protective film and the splicing screen through the inhaled air flow during the cleaning process of the splicing screen surface, thereby reducing bubbles between the protective film and the splicing screen, improving the adhesion effect, and scraping off impurities in the cleaning process through the air flow generated by the air pump to avoid impurity adhesion.

[0024] 3. The present invention can also use the moving mechanism and the cleaning mechanism. When cleaning the protective film, the rotating scraper is driven by the rotating motor to align with the mounting frame and the splicing screen, and the attached protective film is scraped and cleaned by the rotating scraper. At the same time, the air is heated by the heating rod, and the air pump blows the heated air to the inside of the protective film, thereby reducing the adhesion of the protective film to the outside of the cleaning mechanism and improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a side structural schematic diagram of the present invention;

[0027] Figure 3 For the present invention Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 4 It is a schematic structural diagram of the moving mechanism and cleaning mechanism of the present invention;

[0029] Figure 5 For the present invention Figure 4 A schematic diagram of the partially enlarged structure at point B in the middle;

[0030] Figure 6 It is a schematic structural diagram of the mobile mechanism of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure in which the protective film of the present invention is attached to the outer side of the splicing screen;

[0032] Figure 8 For the present invention Figure 7 A schematic diagram of the partially enlarged structure at point C in the middle;

[0033] Figure 9 This is a schematic diagram of the structure after the angle of the rotating scraper of the present invention is adjusted.

[0034] In the figure: 1. Splicing screen; 101. Mounting frame; 102. Base; 103. Support legs; 104. Side baffles; 105. Guide rails; 106. Slots; 2. Protective film; 3. Moving mechanism; 301. Driving motor; 302. Power slider; 303. Rotating motor; 304. Fixing frame; 305. Spring rod; 306. Handle; 307. Fixing plate; 308. Extrusion plate; 4. Cleaning mechanism; 401. Cleaning cotton; 402. Air pump; 403. Heating rod; 404. Rotating scraper; 405. Breathable net; 406. Jet slot. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0036] The following describes an embodiment of the present invention based on its overall structure.

[0037] A modular splicing display screen for use in a large conference room, as shown in the figure, includes a splicing screen 1, which is fixed to the ground by a supporting structure. Moving mechanisms 3 are respectively connected to both sides of the splicing screen 1. Two groups of moving mechanisms 3 slide up and down on the outside of the supporting structure of the splicing screen 1. A rolled protective film 2 is connected between the two groups of moving mechanisms 3. The moving mechanisms 3 drive the protective film 2 to move along the side of the splicing screen 1. An extrusion plate 308 is connected to the interior of each group of moving mechanisms 3. A fixed plate 307 is fixedly connected to the side of each group of moving mechanisms 3. A spring is connected to the side of the fixed plate 307 close to the extrusion plate 308. The fixed plate 307 is movably connected to the extrusion plate 308 through the spring. The moving mechanism 3 squeezes the protective film 2 through the extrusion plate 308 to fit it to the outside of the splicing screen 1.

[0038] A cleaning mechanism 4 is installed between the two groups of moving mechanisms 3. The cleaning mechanism 4 is located above the protective film 2. The cleaning mechanism 4 is connected to a cleaning cotton 401 close to the splicing screen 1. The cleaning mechanism 4 is connected to a rotating scraper 404 on the side close to the protective film 2. A rotating motor 303 is connected to the side of each group of moving mechanisms 3, and the output end of the rotating motor 303 drives the air pump 402 to rotate. Cleaning cotton 401 is opened inside the cleaning mechanism 4. The two ends of the cleaning cotton 401 are aligned with the cleaning cotton 401 and the rotating scraper 404 respectively. A breathable net 405 is provided on the side of the moving scraper 404 close to the splicing screen 1. A heating rod 403 is connected to the interior of the cleaning mechanism 4 above the rotating scraper 404. An air jet slot 406 is provided between the rotating scraper 404 and the cleaning mechanism 4. When the rotating scraper 404 does not rotate, the air jet slot 406 is closed, and the air flow can only flow through the breathable net 405. When the rotating scraper 404 rotates, the air jet slot 406 is opened, and the air flow is discharged through the air jet slot 406, and the air pump 402 is started, and the air pump 402 removes the air flow from the rotating scraper 404. 04's breathable net 405 is sucked in. At this time, the breathable net 405 is aligned with the fitting position of the protective film 2 and the base 102. The negative pressure generated can extract the air at the fitting position, thereby reducing the bubbles when the protective film 2 and the splicing screen 1 are fitted. The cleaning cotton 401 of the cleaning mechanism 4 will scrape and clean the surface of the splicing screen 1. At the same time, the airflow inhaled by the air pump 402 will be blown out through the inside of the cleaning cotton 401 to blow away the scraped impurities, avoiding the accumulation of impurities between the cleaning cotton 401 and the splicing screen 1, reducing the splicing. To repair the damage to the receiving screen 1, start the moving mechanism 3 to drive the cleaning mechanism 4 to move along the outside of the protective film 2 to clean the outside of the protective film 2. During the downward movement, the protective film 2 is cleaned by rotating the scraper 404, and the air pump 402 is started. The air pump 402 sprays air from the breathable net 405 to clean the impurities scraped off. When moving upward, the air pump 402 is started in reverse to clean the protective film 2 through the cleaning cotton 401. The air flow is sprayed through the cleaning cotton 401 to clean the impurities scraped off the cleaning cotton.

[0039] The rotating scraper 404 is rotatably connected to the side of the cleaning mechanism 4. When the protective film 2 is attached, the rotating scraper 404 does not rotate. At this time, the air permeable mesh 405 is aligned with the outer wall of the splicing screen 1, and the air flow passes through the air permeable mesh 405 to clean the splicing screen 1. When the protective film 2 is removed, the rotating motor 303 is started to drive the rotating scraper 404 to rotate, and the angle of the rotating scraper 404 is adjusted so that the edge position of the rotating scraper 404 is attached to the mounting frame 101 and is located at the top of the protective film 2. The air jet slot 406 is opened, and then the heating rod 403 and the air pump 402 are started. The air pump 402 draws the airflow from the cleaning cotton 401 and ejects it through the air jet slot 406. The heating rod 403 heats the airflow, and the moving mechanism 3 is started to move downward, driving the rotating scraper 404 of the cleaning mechanism 4 to scrape and clean the protective film 2. The heated airflow can reduce the cleaning of the scraped protective film 2 that is attached to the outside of the cleaning mechanism 4.

[0040] See also Figure 1 and Figure 2 , the back of the splicing screen 1 is connected to a mounting frame 101, the bottom end of the mounting frame 101 is connected to a base 102, and the side of the base 102 is connected to a supporting foot 104, which is used to limit the base 102. Side baffles 104 are connected to both sides of the splicing screen 1, and guide rails 105 and slots 106 are provided on the outer sides of the side baffles 104. A driving motor 301 is provided on the side of each group of moving mechanisms 3, and the output end of the driving motor 301 is connected to a transmission tooth, and the driving motor 301 engages with the guide rail 105 through the transmission tooth. The inner side of the moving mechanism 3 is also connected to a power-connected slider 302, which slides in the slot 106, and a conductive sheet connected to an external power supply is provided in the slot 106, which facilitates the cleaning mechanism 4 to move outside the splicing screen 1 through the moving mechanism 3, and the moving mechanism 3 and the cleaning mechanism 4 are powered by the power-connected slider 302.

[0041] See also Figure 5 The side of each group of moving mechanisms 3 is connected to a fixed frame 304, the interior of the fixed frame 304 is connected to a spring rod 305, the end of the spring rod 305 is connected to a handle 306, and the rolled protective film 2 is connected to the interior of the moving mechanism 3 by rotating through the spring rod 305. The spring rod 305 is pulled by the handle 306 to move the rolled protective film 2, which can release the limit on the rolled protective film 2 and facilitate the removal of the rolled protective film 2 from the moving mechanism 3.

[0042] See also Figure 8 and Figure 9 The interior of the cleaning mechanism 4 is hollow, and a partition is provided in the hollow part of the cleaning mechanism 4. Multiple groups of air pumps 402 are fixed on the partition. The air pumps 402 can run forward and backward to drive the air flow between the cleaning cotton 401 and the breathable net 405, which facilitates the air flow to flow in the cleaning mechanism 4.

[0043] In the process of assembling the spliced screen, first, the mounting frame 101 is assembled, then the spliced screen 1 is mounted on the mounting frame 101, then the moving mechanism 3 is mounted on the side baffle 104 of the edge of the mounting frame 101, and the power connection sliding block 302 is inserted into the slot 106 through the gear connected with the guide rail 105 at the output end of the driving motor 301, so as to realize the installation and power connection of the moving mechanism 3. Start the moving mechanism 3 and move to the outside of the base 102. Then, pull the spring rod 305 through the handle 306, then place the rotating roller on the protective film 2 between the moving mechanisms 3, release the handle 306, and the spring rod 305 returns to its original position. The spring rod limits the protective film 2. Then pull the port of the protective film 2 apart, pull the extrusion plate 308, separate the extrusion plate 308 from the outer wall of the base 102, pass the end of the protective film 2 through the extrusion plate 308, and attach the protective film 2 to the outer wall of the base 102. Release the extrusion plate 308 to extrude the protective film 2, so that the protective film 2 is attached to the outside of the base 102. Start the air pump 402, and the air pump 402 sucks air from the air-permeable net 405 of the rotating scraper 404 (the rotating scraper 404 is kept at a distance from the spliced screen 1, so that air can flow through the air-permeable net 405). At this time, the air-permeable net 405 is aligned with the attachment position of the protective film 2 and the base 102 (and the spliced screen 1), so that the negative pressure generated can extract the air at the attachment position, thereby reducing the air bubbles when the protective film 2 is attached to the spliced screen 1. At this time, start the moving mechanism 3, which moves the protective film 2 upward, extrudes and pulls the protective film 2 through the extrusion plate 308, so that the protective film 2 is tightly attached to the spliced screen 1, and the protective film 2 is attached to the spliced screen 1 from bottom to top. Move to the top end of the mounting frame 101. While the moving mechanism 3 moves, the cleaning cotton 401 of the cleaning mechanism 4 will scrape and clean the surface of the spliced screen 1, and the air flow sucked by the air pump 402 will be blown out through the inside of the cleaning cotton 401 to blow the scraped impurities, avoiding the accumulation of impurities between the cleaning cotton 401 and the spliced screen 1, and reducing the damage to the spliced screen 1.

[0044] After the film is attached, the attached protective film 2 is cut by hand, so that the top end of the protective film 2 is attached to the outside of the mounting frame 101. During the use of the protective film 2, impurities are easily attached to the surface of the protective film 2. At this time, start the moving mechanism 3 to drive the cleaning mechanism 4 to move along the outside of the protective film 2 to clean the outside of the protective film 2. During the downward movement, the protective film 2 is cleaned by the rotating scraper 404, and the air pump 402 is started to blow air from the air-permeable net 405 to clean the scraped impurities. When moving upward, the air pump 402 is started in the opposite direction to clean the protective film 2 through the cleaning cotton 401, and the air flow is blown out through the cleaning cotton 401 to clean the scraped impurities of the cleaning cotton.

[0045] After the protective film 2 has been used for a long time, it needs to be replaced. At this time, the moving mechanism 3 is first started to drive the cleaning mechanism 4 to move to the top of the protective film 2, and the rotating motor 303 is started to drive the rotating scraper 404 to rotate. The angle of the rotating scraper 404 is adjusted so that the edge position of the rotating scraper 404 is in contact with the mounting frame 101 and is located at the top of the protective film 2. The jet slot 406 is opened, and then the heating rod 403 and the air pump 402 are started. The air pump 402 draws air from the cleaning cotton 401 and ejects it through the jet slot 406. The heating rod 403 heats the air flow, and the moving mechanism 3 is started to move downward, driving the rotating scraper 404 of the cleaning mechanism 4 to scrape and clean the protective film 2. The heated air flow can reduce the scraped protective film 2 from sticking to the outside of the cleaning mechanism 4, thereby preventing the protective film 2 from being blocked on the outside of the cleaning mechanism 4, making it convenient to scrape off the protective film 2, and the attached glue can be scraped off by rotating the scraper 404, thereby improving the cleaning effect.

[0046] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A modular splicing display screen for use in a large conference room, comprising a splicing screen (1), wherein the splicing screen (1) is fixed to the ground via a supporting structure, and is characterized in that: The two sides of the splicing screen (1) are respectively connected with moving mechanisms (3), and two groups of the moving mechanisms (3) slide up and down on the outside of the supporting structure of the splicing screen (1). A rolled protective film (2) is connected between the two groups of moving mechanisms (3), and the moving mechanisms (3) drive the protective film (2) to move on the side of the splicing screen (1). An extrusion plate (308) is connected inside each group of moving mechanisms (3), and the moving mechanisms (3) squeeze the protective film (2) through the extrusion plate (308) to fit the outer side of the splicing screen (1). A cleaning mechanism (4) is installed between the two groups of moving mechanisms (3), and the cleaning mechanism (4) is located above the protective film (2). The cleaning mechanism (4) is close to the splicing screen (1). ) is connected with cleaning cotton (401), the side of the cleaning mechanism (4) close to the protective film (2) is connected with a rotating scraper (404), the side of each group of moving mechanisms (3) is connected with a rotating motor (303), and the output end of the rotating motor (303) drives the air pump (402) to rotate, the interior of the cleaning mechanism (4) is provided with cleaning cotton (401), the two ends of the cleaning cotton (401) are respectively aligned with the cleaning cotton (401) and the rotating scraper (404), the rotating scraper (404) is provided with a breathable net (405) on the side close to the splicing screen (1), and the interior of the cleaning mechanism (4) is located above the rotating scraper (404) and is connected with a heating rod (403); An air jet slot (406) is provided between the rotating scraper (404) and the cleaning mechanism (4). When the rotating scraper (404) does not rotate, the air jet slot (406) is closed, and the air flow can only flow through the air permeable net (405). When the rotating scraper (404) rotates, the air jet slot (406) is opened, and the air flow is discharged through the air jet slot (406). The rotating scraper (404) is rotatably connected to the side of the cleaning mechanism (4). When the protective film (2) is attached, the rotating scraper (404) does not rotate. At this time, the air permeable net (405) is aligned with the outer wall of the splicing screen (1), and the air flow passes through the air permeable net (405) to clean the splicing screen (1). When the protective film (2) is removed, the rotating scraper (404) rotates, and the end of the rotating scraper (404) scrapes off the protective film (2). At the same time, the heating rod (403) is started, and the air flow is heated by the heating rod (403) and blown toward the protective film (2) under the scraping.

2. The modular splicing display screen for use in a large conference room according to claim 1, characterized in that: The back of the splicing screen (1) is connected to a mounting frame (101), the bottom end of the mounting frame (101) is connected to a base (102), both sides of the splicing screen (1) are connected to side baffles (104), and the outer sides of the side baffles (104) are provided with guide rails (105) and slots (106).

3. The modular splicing display screen for use in a large conference room according to claim 2, characterized in that: A driving motor (301) is provided on the side of each group of the moving mechanisms (3), and the output end of the driving motor (301) is connected to a transmission tooth, and the driving motor (301) is engaged with the guide rail (105) through the transmission tooth. The inner side of the moving mechanism (3) is also connected to a power supply slider (302), and the power supply slider (302) slides in the slot (106), and a conductive sheet connected to an external power supply is provided in the slot (106).

4. The modular splicing display screen for use in a large conference room according to claim 1, characterized in that: The side of each group of the moving mechanisms (3) is connected to a fixing frame (304), the interior of the fixing frame (304) is connected to a spring rod (305), the end of the spring rod (305) is connected to a handle (306), the rolled protective film (2) is rotatably connected to the interior of the moving mechanism (3) via the spring rod (305), and the spring rod (305) is pulled by the handle (306) to move, thereby releasing the limit on the rolled protective film (2).

5. The modular splicing display screen for use in a large conference room according to claim 1, characterized in that: A fixed plate (307) is fixedly connected to the side of each group of moving mechanisms (3), and a spring is connected to the side of the fixed plate (307) close to the extrusion plate (308). The fixed plate (307) is movably connected to the extrusion plate (308) via the spring.

6. The modular splicing display screen for use in a large conference room according to claim 1, characterized in that: The interior of the cleaning mechanism (4) is hollow, and a partition is provided in the hollow portion of the cleaning mechanism (4). A plurality of air pumps (402) are fixed on the partition. The air pumps (402) can operate forward and reversely to drive air flow between the cleaning cotton (401) and the breathable net (405).

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