An LED mobile information display device

Abstract

This invention relates to the field of educational demonstrations, specifically an LED mobile information demonstration device, including a support assembly, a maintenance box, and a display screen for educational demonstrations. The support assembly has the display screens arranged on six sides, and includes a door slot and a door body. The maintenance box and display screen are mounted on the door body. An active mechanism inside the door body drives the maintenance box to move aside. The maintenance box in the middle of the door body serves as a trigger structure for opening the door. The display screen and speaker are located at the edge of the support assembly, with sound holes on the display screen. The active mechanism includes a trigger drive group and a linkage group. This invention arranges the display screens on all six sides of the space, and combines the sound holes on the display screens with the speaker to maintain a good sound experience and an unobstructed demonstration. The movement of the display screens at the top, middle, and bottom of the door body avoids the door body from affecting the edges of the top and bottom display screens when opening and closing. Furthermore, the door opening operation is combined with the avoidance action of the display screens, avoiding the need for additional door opening structures that would affect the continuity of the demonstration.

Description

Technical Field

[0001] This invention relates to the field of educational demonstrations, specifically to an LED mobile information demonstration device. Background Technology

[0002] With the development of education, multi-faceted mobile information display space equipment has begun to be added to educational demonstration tools. This is an immersive virtual teaching demonstration environment based on five or six walls, allowing learners to feel as if they are there. For example, students can stand in a huge model of the solar system and intuitively observe the position and trajectory of various galaxies. They can "walk into" the interior of a protein molecule and observe how its three-dimensional structure combines with drug molecules. It transforms the scale that cannot be experienced in person into an explorable space, changing the way students understand scientific concepts, and thus gradually occupying an important position in educational demonstration equipment.

[0003] However, existing multi-faceted information display spaces typically have five display surfaces. Some use the remaining surface as an opening area and a speaker placement area, while others place the remaining surface on the ground, then open an opening in the display area on the wall as a doorway, and then hang the speaker overhead. This makes the former's display effect insufficient, while the latter's display effect is not only insufficient but also often obstructed, failing to achieve a good display effect. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an LED mobile information demonstration device that solves the problem of doors and speakers obstructing the demonstration area by covering the entire six-sided frame with a display screen and using specially designed doors and speakers.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an LED mobile information display device, comprising a support assembly, a maintenance box fixed to the support assembly, and a display screen mounted on the maintenance box. The support assembly is a cuboid six-sided frame, and the display screen is arranged along the six sides of the frame. The support assembly has a door slot for entry and exit, and a door body is movably mounted within the door slot. The door body includes a door frame structure, on which the maintenance box and the display screen are mounted for continuous display with the surrounding display screens. The support assembly has a door opening component for moving the door body to open and close the door. The gantry structure includes a movable mechanism that moves the maintenance box on the gantry to avoid the display screen on the support assembly. The maintenance box in the middle of the gantry serves as the trigger structure for opening the gantry. Corner mounting brackets are located at the edges of the six-sided frame. A display screen is mounted at the bottom of each corner mounting bracket, connecting with the surrounding display screens for continuous display. A speaker is installed inside each corner mounting bracket, and the display screen at the bottom of the corner mounting bracket has several penetrating sound holes. The movable mechanism includes a trigger drive group and a linkage group. The trigger drive group is connected to the maintenance box in the middle of the gantry, and the linkage group is connected to the maintenance boxes at the top and bottom of the gantry.

[0006] Furthermore, the gate frame structure includes a central frame and upper and lower side frames. A sliding frame is fixed on the maintenance box in the middle of the gate. The sliding frame is slidably connected to the central frame via a linear guide. The maintenance box in the middle of the gate provides space for the maintenance boxes at the upper and lower ends of the gate to move. The trigger drive group includes a central moving frame and a shifting elastic element. The central moving frame is fixed on the maintenance box in the middle of the gate. The shifting elastic element is elastic and has one end fixed on the central moving frame and the other end fixed on the central frame. The trigger drive group also includes a drive motor. The central moving frame is connected to the drive motor for transmission. The drive motor is used to drive the central moving frame to move while retaining the freedom to slide independently into the gate.

[0007] Furthermore, the linkage assembly includes several linkages, which are hinged to the maintenance box and the side frame respectively. The linkages form a parallelogram mechanism. The side frame is equipped with a telescopic actuator, which is connected to the linkage of the linkage assembly to drive the maintenance boxes at the upper and lower ends of the door to move. The middle frame is equipped with a switch sensor to detect the position of the middle moving frame.

[0008] Furthermore, the shifting elastic element is provided in several symmetrically distributed on both sides of the central moving frame. The shifting elastic elements on both sides are used to provide elastic force to drive the central moving frame to move outward or inward of the door body. The position where the shifting elastic element applies elastic force to the central moving frame in the vertical direction is taken as the middle position. The angle between the shifting elastic element and the middle position after the central moving frame is moved to the extreme position outward is smaller than the angle between the shifting elastic element and the middle position after the central moving frame is moved to the extreme position inward.

[0009] Furthermore, the trigger drive assembly also includes a rack, a gear, and a drive motor. The rack is fixedly mounted on the central moving frame and perpendicular to the display screen. The drive motor is fixed on the central frame and has a bidirectional three-axis moving shaft. The gear is nested on the bidirectional three-axis moving shaft and meshes with the rack. The drive motor is a geared motor. The bidirectional three-axis moving shaft is used to drive the gear to actively drive the rack to move to the outside of the door or to the inside of the door. The bidirectional three-axis moving shaft retains the degree of freedom for the rack to actively drive the gear to move to the inside of the door on the bidirectional three-axis moving shaft.

[0010] Furthermore, the bidirectional three-movement shaft is provided with double-moving teeth and single-moving ratchets in sequence along the axial direction. Several double-moving teeth and single-moving ratchets are arranged around the bidirectional three-movement shaft. The bidirectional three-movement shaft has a movable groove, and the single-moving ratchet is rotatably mounted within the movable groove. An external top spring is provided between the single-moving ratchet and the movable groove to drive the single-moving ratchet to move outward. The gear has a driven groove on its inner side, which engages with either the double-moving tooth or the single-moving ratchet. The trigger drive assembly also includes a shift guide frame for driving the gear to move on the bidirectional three-movement shaft. The shift guide frame is fixed to both sides of the rack. The shift guide frame has protruding double-moving tops and single-moving tops. The double-moving top is located at the end closer to the central moving frame, while the single-moving top is located at the end farther from the central moving frame. The double-moving top is used to abut against the gear, driving the gear to move onto the double-moving teeth on the bidirectional three-movement shaft. The single-moving top is used to abut against the gear, driving the gear to move onto the single-moving ratchet on the bidirectional three-movement shaft.

[0011] Furthermore, the rotation axis of the single-action ratchet is parallel to the axis of the bidirectional three-action shaft. The rack moving towards the inside of the door body drives the gear to squeeze the single-action ratchet, causing the single-action ratchet to retract into the movable groove. The distance between the double-action top and the single-action top in the length direction of the rack is greater than the sum of the thicknesses of the display screen and the maintenance box, and also greater than the distance in the horizontal direction between the bottom and top of the shifting elastic element after the shifting elastic element drives the middle frame to move to the extreme position outside the door body.

[0012] Furthermore, the display screen on the maintenance box in the middle of the door is a dot matrix display screen. The display screen includes several arrayed LED beads and a screen body wrapped around the sides of the LED beads. The screen body has a transparent layer at the edge of the maintenance box in the middle of the door. The screen body has a light strip at the transparent layer on the inside of the screen body. The light strip is used to make the display screen on the maintenance box in the middle of the door form individual bright lights at the edge of the maintenance box.

[0013] Furthermore, the support assembly includes a base frame and a ground frame fixed on the base frame. The door slot is located on the ground frame, and the base frame extends outward to form a platform. A top slide rail is fixed to the ground frame at the top of the door slot via a crossbeam. A bottom slide rail is provided on the platform. The door body includes an outer shell located outside the door frame structure. A slider is provided at the top and bottom of the outer shell, and the slider slides and engages within the top and bottom slide rails. Height positioning pins are provided on both sides of the outer shell, and height positioning seats are provided on the ground frames on both sides of the door slot. During the closing process of the door body, the height positioning pins are embedded and engaged within the height positioning seats. An outer wall is provided on the outside of the ground frame, and a switch is provided on the outer wall for activating the door opening assembly. The door opening assembly includes a sprocket motor fixedly mounted on the ground frame, a drive sprocket mounted on the sprocket motor, several driven sprockets rotatably mounted on the crossbeam, and a chain winding around the drive sprocket and driven sprockets. A connecting frame is provided on the chain, and the connecting frame is connected to the slider at the top of the outer shell.

[0014] Furthermore, the top and bottom slide rails are bent and include an outer moving rail and a side yielding rail. The outer moving rail is perpendicular to the maintenance box on the door body, and the side yielding rail extends laterally from the outer end of the outer moving rail. The side of the chain near the top slide rail is bent in the same way as the top slide rail. The length of the outer moving rail is greater than the thickness of the outer shell in the length direction of the outer moving rail. There is one slider at the top of the outer shell and at least two sliders at the bottom of the outer shell.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In order to achieve a continuous six-sided demonstration, this invention lays a display screen on each of the six sides of the six-sided frame space, and combines the sound holes of the display screen with the speakers. While maintaining an unobstructed demonstration inside the space, it also allows for a good sound experience inside the space. At the same time, the display screen is integrated with the door structure to reduce the discontinuous effect of the separate door structure on the display.

[0017] Furthermore, this invention uses three sets of maintenance boxes on the door to move and avoid the display screens at the top, middle, and bottom, preventing the edges of the display screens from being affected by the door sinking or the track undulating during movement. It also combines the door opening operation inside the space with the display screen's avoidance action to trigger the door opening, resulting in a more direct door opening operation and avoiding the need to add a door opening structure that would affect the continuity of the demonstration. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an LED mobile information display device according to the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the display screen and maintenance box of the present invention mounted on the bracket assembly.

[0020] Figure 3 This is a three-dimensional structural diagram of the speaker and display screen of the present invention, as well as a partial structural diagram of the display screen.

[0021] Figure 4 This is a three-dimensional structural diagram of the door body, support assembly, and door opening assembly of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the door opening assembly, top slide rail, and bottom slide rail of the present invention in conjunction with the door shell.

[0023] Figure 6 This is a three-dimensional structural diagram of the interior of the door body of the present invention.

[0024] Figure 7 This is a three-dimensional structural diagram of the maintenance box, the middle frame, and the trigger drive group of the present invention, as well as a partial three-dimensional diagram of the edge of the display screen.

[0025] Figure 8 This is a schematic diagram showing the changes in the working state inside the door of the present invention.

[0026] Figure 9 This is a three-dimensional structural schematic diagram of the trigger drive group of the present invention and a partial schematic diagram of the gear movement driven by the shift guide frame.

[0027] Figure 10 This is a three-dimensional structural diagram of the gear of the present invention in cooperation with a two-way three-moving shaft, and a side view of the gear in cooperation with a single-moving ratchet or a double-moving tooth.

[0028] In the diagram: 1. Bracket assembly; 2. Maintenance box; 3. Exterior wall; 4. Display screen; 5. Speaker; 6. Door; 7. Door opening assembly; 8. Screen controller; 9. Corner mounting bracket;

[0029] 11. Ground shelf; 12. Ground shelf; 13. Platform; 14. Top slide rail; 15. Bottom slide rail; 16. Horizontal frame; 17. Height positioning seat; 1a. Doorway; 1b. Outer moving rail; 1c. Side clearance rail; 21. Sliding frame; 22. Linear rail; 41. Screen body; 42. LED beads; 43. Transparent layer; 44. LED strip; 45. Sound hole; 61. Outer shell; 62. Middle frame; 63. Side frame; 64. Trigger drive group; 65. Linkage group; 66. Telescopic actuator; 67. Slider; 68. Switch sensor; 71. Sprocket motor; 72. Drive sprocket; 73. Driven sprocket; 74. Chain; 75. Connecting frame;

[0030] 611. Height positioning pin; 641. Central moving frame; 642. Shifting elastic element; 643. Rack; 644. Gear; 645. Drive motor; 646. Two-way three-moving shaft; 647. Shifting guide frame;

[0031] 6441, Driven groove; 6461, Moving groove; 6462, Single-acting ratchet; 6463, External top spring; 6464, Double-acting tooth; 6471, Double-acting top; 6472, Single-acting top. Detailed Implementation

[0032] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but 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.

[0033] Examples, such as Figures 1-10 As shown: This invention provides an LED mobile information demonstration device for educational demonstrations using closely connected images. It includes a support assembly 1, a maintenance box 2 fixed to the support assembly 1, and a display screen 4 mounted on the maintenance box 2. The support assembly 1 is a cuboid six-sided frame, including a base frame 12 and a ground frame 11 fixed to the base frame 12. The base frame 12 serves as the ground, while the ground frame 11 forms a frame above it. The maintenance box 2 and the display screen 4 are arranged closely along the six sides of the six-sided frame. It should be noted that this close arrangement is for visual preservation... To ensure continuity, rather than having each display screen 4 completely sealed off, there are objective gaps between each display and the maintenance box 2, which also makes the space not a completely sealed environment. The maintenance box 2 is equipped with a screen controller 8, which is usually a power supply and control motherboard, used to provide power to the display screen 4 and transmit data. The bracket assembly 1 is equipped with a door slot 1a for entry and exit, and a door 6 is movable in the door slot 1a. The maintenance box 2 and the display screen 4 are connected to the surrounding display screen 4 on the door frame structure to make a continuous display. The display screen 4 is covered by a six-sided frame, thus forming a complete and continuous display space.

[0034] The display screen 4 is a dot matrix display screen 4, which includes several arrayed LED beads 42 and a screen body 41 wrapped around the sides of the LED beads 42. In this embodiment, the screen body 41 is square and is wrapped around the sides of the LED beads 42 with plastic. The LED beads 42 are LED beads 42. The back of the screen body 41 is provided with magnets and ribbon cables. The magnets are used to attach to the maintenance box 2 for installation, and the ribbon cables are used to connect to the screen controller 8. In this embodiment, six display screens 4 are installed on one maintenance box 2, arranged in two rows of three. The size of a single display screen 4 is 32cm*32cm.

[0035] Regarding sound, in existing technologies, demonstration rooms with continuous visuals typically have one side without a screen, serving as an entrance and housing the speaker 5. Some demonstration rooms place the speaker 5 directly inside the room, resulting in discontinuous visuals. In this embodiment, a corner mounting bracket 9 is provided at the edge of the six-sided frame, specifically at the four corners of the top of the six-sided frame. The maintenance box 2 at this location is also correspondingly notched to provide space for the corner mounting bracket 9. A display screen 4 is installed at the bottom of the corner mounting bracket 9 to provide continuous visuals with the surrounding display screens 4. The speaker 5 is installed inside the corner mounting bracket 9. The display screen 4 at the bottom of the corner mounting bracket 9 has several penetrating sound holes 45. Specifically, penetrating holes are provided between the LED beads 42 on the main body of the screen 41, allowing the front and back of the display screen 4 to be connected. This allows the sound emitted by the speaker 5 inside the corner mounting bracket 9 to be transmitted through the display screen 4. By arranging multiple speakers 5, a better sound experience can be obtained while ensuring continuous visuals. At the same time, sound holes 45 can be opened in the display screen 4 in the required areas for ventilation.

[0036] For the door structure, the door body 6 includes a door frame structure, the door frame structure of the door body 6 includes a middle frame 62 in the middle and side frames 63 at the top and bottom ends. The door body 6 includes an outer shell 61 outside the door frame structure. The support assembly 1 is provided with a door opening assembly 7 for driving the door body 6 to move and open and close the door. The outer wall 3 is provided on the outside of the ground frame 11. The switch is provided on the outer wall 3 for activating the door opening assembly 7. The door groove 1a is provided on the ground frame 11. The ground frame 12 extends outward to provide a platform 13. The top of the ground frame 11 at the top of the door groove 1a is fixed with a top slide rail 14 by a cross frame 16. The platform 13 is provided with a bottom slide rail 15. The top and bottom ends of the outer shell 61 are provided with sliders 67. The top and bottom sliders 67 are slidably engaged in the top slide rail 14 and the bottom slide rail 15.

[0037] The door opening assembly 7 includes a sprocket motor 71 fixedly mounted on the ground frame 11, a drive sprocket 72 mounted on the sprocket motor 71, several driven sprockets 73 rotatably mounted on the crossbeam 16, and a chain 74 winding around the drive sprocket 72 and the driven sprockets 73. A connecting frame 75 is provided on the chain 74, and the connecting frame 75 is connected to the slider 67 at the top of the outer casing 61. The top slide rail 14 and the bottom slide rail 15 are bent and include an outer moving rail 1b and a side yielding rail 1c. The outer moving rail 1b is perpendicular to the maintenance box 2 on the door body 6, and the side yielding rail 1c extends laterally from the outer end of the outer moving rail 1b in an L-shape. The side of 74 near the top slide rail 14 is bent in the same way as the top slide rail 14. It should be noted that the length of the outer moving rail 1b is greater than the thickness of the outer shell 61 in the length direction of the outer moving rail 1b, so as to ensure that there is enough space for the door 6 to move outward. There is one slider 67 at the top of the outer shell 61 and at least two at the bottom of the outer shell 61, so as to form a stable structure to determine the left and right position of the door 6 in the door groove 1a, so that the top sprocket motor 71 can drive the chain 74 to move, so that the chain 74 pulls the top of the outer shell 61, thereby pulling the door 6 to move and open the door within the top slide rail 14 and the bottom slide rail 15.

[0038] Height positioning pins 611 are provided on both sides of the outer shell 61, and height positioning seats 17 are provided on the ground frame 11 on both sides of the door slot 1a. During the closing process of the door body 6, the height positioning pins 611 are embedded and engaged in the height positioning seats 17, thereby forming a stable structure to determine the vertical position of the door body 6 in the door slot 1a.

[0039] Furthermore, when the door 6 moves, the upper and lower edges of the upper and lower display screens 4 are affected by the sinking or undulation of the track. Therefore, the door frame structure is equipped with a movable mechanism to move the maintenance box 2 on the door 6 to avoid the display screens 4 on the bracket assembly 1. Specifically, it avoids the display screens 4 at the top and bottom of the door 6. At the same time, the continuity of the internal display needs to be considered. There is no separate switch for opening the door. Therefore, the maintenance box 2 in the middle of the door 6 is used as the trigger structure for opening the door.

[0040] In this embodiment, since it is difficult to determine which display screen 4 the image is on after the image is output, it is possible to display the door opening prompt through the source video and display it on the display screen 4 in the middle of the door body 6 in the prior art, but it would require a lot of debugging. Therefore, in this embodiment, the screen body 41 is provided with a transparent layer 43 at the edge of the maintenance box 2 in the middle of the door body 6, and a light strip 44 is provided on the inner side of the screen body 41 at the transparent layer 43. The light strip 44 is an LED light strip 44 in the prior art. The light strip 44 is used to make the display screen 4 on the maintenance box 2 in the middle of the door body 6 form a separate bright light at the edge of the maintenance box 2. When the light strip 44 is not bright, the transparent layer 43 on the side of the display screen 4 and the adjacent display screen 4 have a natural transition. After the light strip 44 is bright, the six display screens 4 on the maintenance box 2 in the middle of the door body 6 form a large outer contour halo.

[0041] In this embodiment, the active mechanism includes a trigger drive group 64 and a linkage group 65. The trigger drive group 64 is connected to the maintenance box 2 in the middle of the door body 6, and the linkage group 65 is connected to the maintenance boxes 2 at the upper and lower ends of the door body 6.

[0042] For the linkage group 65, the linkage group 65 includes several links, which are hinged to the maintenance box 2 and the side frame 63 respectively. The links form a parallelogram mechanism. The side frame 63 is equipped with a telescopic actuator 66, which is connected to the links of the linkage group 65 to drive the maintenance boxes 2 at the upper and lower ends of the door body 6 to move. The telescopic actuator 66 is an electric push rod. When the door is opened, after the maintenance box 2 in the middle moves to the appropriate position, the telescopic actuator 66 drives the linkage group 65 to swing so that the maintenance boxes 2 at the upper and lower ends move towards the middle of the door body 6. When the door is closed, after the door body 6 moves to the closed position on the track, the telescopic actuator 66 drives the linkage group 65 to swing so that the maintenance boxes 2 on both sides move towards the sides of the door body 6. Then the maintenance box 2 in the middle extends and abuts against the maintenance boxes 2 at the upper and lower ends.

[0043] For the trigger drive assembly 64, a sliding frame 21 is fixed on the maintenance box 2 in the middle of the door body 6. The sliding frame 21 is slidably connected to the middle frame 62 through the linear guide 22, so that the maintenance box 2 can slide in the middle frame 62. The sliding direction is outward of the door. The maintenance box 2 in the middle of the door body 6 provides space for the maintenance boxes 2 at the upper and lower ends of the door body 6 to move. The trigger drive assembly 64 includes a central moving frame 641 and a shifting elastic element 642. The central moving frame 641 is fixed on the middle of the maintenance box 2 in the middle of the door body 6. The shifting elastic element 642 is elastic and one end is fixed on the central moving frame 641 and the other end is fixed on the middle frame 62. The trigger drive assembly 64 also includes a drive motor 645. The central moving frame 641 is connected to the drive motor 645. The drive motor 645 is used to drive the central moving frame 641 to move and retains the freedom to slide alone inward of the door body 6. That is, it allows the central moving frame 641 to move alone in the direction of the drive motor 645 while maintaining the connection.

[0044] It should be noted that a switch sensor 68 is provided on the middle frame 62 to detect the position of the middle moving frame 641. In this embodiment, a control board is provided for the electrical connection between the drive motor 645, the telescopic driver 66, the door opening switch, the sprocket motor 71 and the switch sensor 68. This board is used to receive feedback from the switch sensor 68, receive control from the switch, and control the drive motor 645 and the telescopic driver 66 to work. The switch sensor 68 is an infrared sensor. A reflector is provided below the middle frame 62 to receive the infrared sensor. After the middle moving frame 641 moves to a certain position, it blocks the infrared light, thereby triggering other mechanisms.

[0045] Several repositioning elastic elements 642 are provided and symmetrically distributed on both sides of the central moving frame 641. The repositioning elastic elements 642 on both sides are used to provide elastic force to drive the central moving frame 641 to move outward or inward to the door body 6. The position where the repositioning elastic element 642 applies elastic force to the central moving frame 641 in the vertical direction is the middle position, which is the critical position. When the repositioning elastic element 642 drives the central moving frame 641 to move outward to the door body 6, if the central moving frame 641 moves inward to the door body 6, after crossing the critical position, the repositioning elastic element 642 will change the direction of force application to drive the central moving frame 641 to move inward to the door body 6.

[0046] It should be noted that the angle between the shifting elastic element 642 and the middle position after the central moving frame 641 moves to the extreme position outside the door 6 is smaller than the angle between the shifting elastic element 642 and the middle position after the central moving frame 641 moves to the extreme position inside the door 6. This results in a smaller stroke and force required to push the maintenance box 2. It should also be noted that the shifting elastic element 642 is a spring. The required spring force can be set by those skilled in the art according to actual needs. In this embodiment, the spring is nested on a set of telescopic rods. The telescopic rods include an outer tube and a middle rod nested together. The purpose is to guide the deformation direction of the spring, so that the springs at the upper and lower ends apply a more uniform force to the central moving frame 641 in the middle.

[0047] Meanwhile, the trigger drive group 64 also includes a rack 643, a gear 644, and a drive motor 645. The rack 643 is fixedly mounted on the intermediate frame 641 and is perpendicular to the display screen 4. The drive motor 645 is fixed on the intermediate frame 62 and is equipped with a bidirectional three-axis 646. The gear 644 is nested on the bidirectional three-axis 646 and meshes with the rack 643. The drive motor 645 is a geared motor, that is, the motor output shaft is first connected to the gearbox, and the transmission is transmitted outward through the gearbox to obtain greater torque. However, the gearbox is difficult to input rotation in the reverse direction. The bidirectional three-axis 646 is used to drive the gear 644 to actively drive the rack 643 to move outward or inward to the door body 6. The bidirectional three-axis 646 retains the degree of freedom for the rack 643 to actively drive the gear 644 to move inward to the door body 6, that is, it allows the intermediate frame 641 to move independently towards the drive motor 645 while keeping the gear 644 and rack 643 meshed.

[0048] Specifically, the bidirectional three-moving shaft 646 is provided with a double-moving gear 6464 and a single-moving ratchet 6462 in sequence along the axial direction. Several double-moving gears 6464 and single-moving ratchets 6462 are arranged around the bidirectional three-moving shaft 646. The bidirectional three-moving shaft 646 is provided with a movable groove 6461. The single-moving ratchet 6462 is rotatably mounted in the movable groove 6461. An external top spring 6463 is provided between the single-moving ratchet 6462 and the movable groove 6461 to drive the single-moving ratchet 6462 to move outward. A driven groove 6441 is provided inside the gear 644. The driven groove 6441 engages with either the double-moving gear 6464 or the single-moving ratchet 6462. The rotation axis of the tooth 6462 is parallel to the axis of the bidirectional three-movement shaft 646. The rack 643, which moves towards the inside of the door body 6, drives the gear 644 to squeeze the single-movement ratchet 6462, causing the single-movement ratchet 6462 to retract into the movable groove 6461. Thus, when the rack 643 moves towards the inside of the outer shell 61, it can press the single-movement ratchet 6462 through the gear 644, and is not blocked by the rotating shaft. When the drive motor 645 wants to actively drive the rack 643 to move towards the inside of the outer shell 61, it can directly drive the gear 644 to rotate through the single-movement ratchet 6462 against the gear 644, so that the rack 643 moves towards the inside of the outer shell 61.

[0049] Meanwhile, the trigger drive assembly 64 also includes a shift guide 647 for driving the gear 644 to move on the bidirectional three-movement shaft 646. The shift guide 647 is fixed on both sides of the rack 643. The shift guide 647 is provided with a protruding double-movement top 6471 and a single-movement top 6472. The double-movement top 6471 is located at the end closer to the central moving frame 641, while the single-movement top 6472 is located at the end away from the central moving frame 641. The double-movement top 6471 is used to abut against the gear 644, driving the gear 644 to move on the double-movement tooth 6464 on the bidirectional three-movement shaft 646. The single-movement top 6472 is used to abut against the gear 644, driving the gear 644 to move on the single-movement ratchet 6462 on the bidirectional three-movement shaft 646. When the rack moves inward toward the inside of the housing 61, the gear 644 engages in the area of ​​the single-action ratchet 6462. At this time, the rack 643 needs to cross the middle position inward, and the display screen 4 and the maintenance box 2 need to retract into the housing 61 to make enough room for movement. Then, the shifting elastic element 642 drives the rack 643 to continue forward, reducing the burden on the user's hand. At the same time, the double-action top 6471 is ready to abut against the gear 644, driving the gear 644 to move axially on the bidirectional three-action shaft 646, thereby entering the area of ​​the double-action ratchet 6464. Since the double-action ratchet 6464 and the bidirectional three-action shaft 646 do not rotate at this time, the movement of the rack 643 will be restricted, but enough space has been made to avoid affecting the maintenance boxes 2 at the upper and lower ends.

[0050] It should be noted that the distance between the double-action top 6471 and the single-action top 6472 along the length of the rack 643 is greater than the sum of the thicknesses of the display screen 4 and the maintenance box 2. It is also greater than the distance between the bottom and top of the shifting elastic element 642 in the horizontal direction after the shifting elastic element 642 drives the middle frame 641 to move to the extreme position outside the door 6. That is, the distance between the bottom of the shifting elastic element 642 and the middle position.

[0051] In summary, in this embodiment, when the user activates the switch on the outer wall 3, the switch controls the drive motor 645 to work, and the bidirectional three-moving shaft 646 rotates. At this time, the gear 644 meshes with the single-moving ratchet 6462. The rotation of the single-moving ratchet 6462 abuts against the gear 644, causing the rack 643 to move inward toward the outer shell 61. This causes the maintenance box 2 in the middle of the door 6 to move inward toward the outer shell 61. The telescopic actuators 66 on both sides work to drive the connecting rod to swing toward the middle of the outer shell 61, causing the maintenance boxes 2 on both sides to move toward the middle, avoiding the upper and lower sides. Then, the sprocket motor 71 works to drive the chain 74 to move, so that the door 6 moves along the outer moving rail 1b and the slider 67. The side rail 1c moves to the outside of the bracket assembly 1, opening the door slot 1a to allow the user to enter. Then, each mechanism is reset in reverse order, i.e., the sprocket motor 71 works, the telescopic driver 66 works, and the drive motor 645 works. At this time, the double-acting top 6471 abuts against the gear 644, causing the gear 644 to be locked on the double-acting tooth 6464. The bidirectional three-acting shaft 646 drives the gear 644 to rotate through the double-acting tooth 6464, pushing the rack 643 to reset, allowing the door 6 to close, so that the bracket assembly 1 forms a six-sided continuous demonstration space, allowing the user to watch the educational demonstration on the display screen 4 and feel the sound through the hidden speaker 5 in the corner.

[0052] After the viewing ends, the light strip 44 inside the display screen 4 in the middle of the door 6 lights up, and the six display screens 4 on the maintenance box 2 in the middle of the door 6 form a large outer contour light ring. The user pushes this area, causing the display screen 4, maintenance box 2 and rack 643 to move into the outer shell 61. The driven groove 6441 of the gear 644 presses the single-acting ratchet 6462, causing the single-acting ratchet 6462 to swing and retract into the movable groove 6461, thus no longer being blocked by the bidirectional three-acting shaft 646. After the shifting elastic member 642 passes the middle position, the shifting elastic member 642 drives the rack 643 to continue forward, reducing the burden of the user's push. At the same time, the double-acting top 6471 prepares to abut against the gear 644, driving the gear 644 to move axially on the bidirectional three-acting shaft 646, thus entering the double-acting tooth 6464 area. At this time, the switch sensor 68 detects that the middle moving frame 641 has blocked it, drives the telescopic driver 66 to work, and then drives the sprocket motor 71 to work, thereby opening the door.

[0053] Thus, while preserving the internal continuity of the display, a sound experience is obtained, and the display screen 4 is integrated with the door structure on the door body 6, reducing the impact of the separate door opening structure on the display. Through the movement and avoidance of the display screen 4, the edge of the display screen 4 is prevented from being affected by the sinking or track undulation when the door body 6 moves. Furthermore, the avoidance action of the display screen 4 is combined with the door opening trigger to obtain a more direct door opening operation.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An LED mobile information display device, characterized in that: The device includes a support assembly, a maintenance box fixed to the support assembly, and a display screen mounted on the maintenance box. The support assembly is a six-sided cuboid frame, and the display screen is arranged along the six sides of the frame. The support assembly has a door slot for entry and exit, and a door is movably mounted within the door slot. The door includes a gantry structure, and the maintenance box and display screen are mounted on the gantry structure. The display screen on the maintenance box is connected to the surrounding display screens for a continuous display. The bracket assembly is equipped with a door opening component for moving the door to open and close the door. The gantry structure is equipped with a movable mechanism to move the maintenance box on the door to avoid the display screen on the bracket assembly. The maintenance box in the middle of the door serves as the trigger structure for opening the door. The six-sided frame is provided with a corner mounting bracket at its edge. A display screen is installed at the bottom of the corner mounting bracket and is connected to the surrounding display screens for continuous display. A speaker is installed inside the corner mounting bracket, and the display screen at the bottom of the corner mounting bracket is provided with several penetrating sound holes. The active mechanism includes a trigger drive group and a linkage group. The trigger drive group is connected to the maintenance box in the middle of the door body, and the linkage group is connected to the maintenance boxes at the upper and lower ends of the door body. The gate frame structure includes a middle frame in the middle and side frames at the top and bottom. A sliding frame is fixed on the maintenance box in the middle of the gate. The sliding frame is slidably connected to the middle frame via a linear rail. The maintenance box in the middle of the gate provides space for the maintenance boxes at the top and bottom of the gate to move by sliding. The trigger drive group includes a central moving frame and a shifting elastic element. The central moving frame is fixed on the maintenance box in the middle of the door body. The shifting elastic element is elastic and has one end fixed on the central moving frame and the other end fixed on the central frame. The trigger drive group also includes a drive motor, and the central moving frame is connected to the drive motor for transmission. The drive motor is used to drive the central moving frame to move while retaining the degree of freedom to slide independently into the door body. The trigger drive group also includes a rack, a gear and a drive motor. The rack is fixedly mounted on the central moving frame and is perpendicular to the display screen. The drive motor is fixed on the central frame and is provided with a bidirectional three-moving shaft. The gear is nested on the bidirectional three-moving shaft and meshes with the rack. The drive motor is a geared motor. The bidirectional three-movement shaft is used to drive the gear to actively drive the rack to move to the outside of the door or to the inside of the door. The bidirectional three-movement shaft retains the degree of freedom for the rack to actively drive the gear to move to the inside of the door on the bidirectional three-movement shaft. The bidirectional three-movement shaft is provided with double-movement teeth and single-movement ratchet teeth in sequence in the axial direction.

2. The LED mobile information display device according to claim 1, characterized in that: The linkage assembly includes several links, which are hinged to the maintenance box and the side frame respectively. The links form a parallelogram mechanism. The side frame is equipped with a telescopic actuator, which is connected to the links of the linkage assembly to move the maintenance boxes at the upper and lower ends of the door. The middle frame is equipped with a switch sensor to detect the position of the middle moving frame.

3. The LED mobile information display device according to claim 1, characterized in that: The shifting elastic element is provided in several parts and symmetrically distributed on both sides of the central moving frame. The shifting elastic element on both sides is used to provide elastic force to drive the central moving frame to move outward or inward of the door body. The position of the shifting elastic member is the position where the elastic force is applied to the central moving frame in the vertical direction. The angle between the shifting elastic member and the central moving frame after the central moving frame moves to the extreme position outside the door is smaller than the angle between the shifting elastic member and the central moving frame after the central moving frame moves to the extreme position inside the door.

4. The LED mobile information display device according to claim 1, characterized in that: The double-acting teeth and single-acting ratchets are provided in a plurality of form and are arranged around the bidirectional three-acting shaft. The bidirectional three-acting shaft is provided with a movable groove. The single-acting ratchet is rotatably mounted in the movable groove. An external top spring is provided between the single-acting ratchet and the movable groove to drive the single-acting ratchet to move outward. The gear is provided with a driven groove on its inner side. The driven groove is engaged with the double-acting teeth or single-acting ratchet. The trigger drive assembly also includes a shift guide for driving the gear to move on a bidirectional three-movement shaft. The shift guide is fixed on both sides of the rack. The shift guide has a raised double-movement top and a single-movement top. The double-movement top is located at one end closer to the central moving frame, while the single-movement top is located at one end farther from the central moving frame. The double-movement top is used to abut against the gear and drive the gear to move on the double-movement teeth on the bidirectional three-movement shaft. The single-movement top is used to abut against the gear and drive the gear to move on the single-movement ratchet teeth on the bidirectional three-movement shaft.

5. The LED mobile information display device according to claim 4, characterized in that: The rotation axis of the single-acting ratchet is parallel to the axis of the two-way three-acting shaft. The rack moving towards the inside of the door body drives the gear to squeeze the single-acting ratchet, causing the single-acting ratchet to retract into the movable groove. The distance between the double-acting top and the single-acting top in the length direction of the rack is greater than the sum of the thicknesses of the display screen and the maintenance box, and is also greater than the distance between the bottom and top of the shifting elastic element in the horizontal direction after the shifting elastic element drives the middle frame to move to the extreme position outside the door.

6. The LED mobile information display device according to claim 1, characterized in that: The display screen on the maintenance box in the middle of the door is a dot matrix display screen. The display screen includes several arrayed LED beads and a screen body wrapped around the sides of the LED beads. The screen body has a transparent layer at the edge of the maintenance box in the middle of the door. The screen body has a light strip at the transparent layer on the inside of the screen body. The light strip is used to make the display screen on the maintenance box in the middle of the door form individual bright lights at the edge of the maintenance box.

7. The LED mobile information display device according to claim 1, characterized in that: The support assembly includes a base frame and a ground frame fixed on the base frame. The door slot is located on the ground frame. The base frame extends outward to provide a platform. The ground frame at the top of the door slot is fixed with a top slide rail by a crossbar. A bottom slide rail is provided on the platform. The door body includes an outer shell located outside the door frame structure. The top and bottom of the outer shell are provided with sliders. The sliders slide and engage in the top and bottom slide rails. The outer shell is provided with height positioning pins on both sides, and height positioning seats are provided on the ground frame on both sides of the door slot. During the closing process of the door, the height positioning pins are embedded and engaged in the height positioning seats. The outer side of the ground frame is provided with an outer wall, and the outer wall is provided with a switch for activating the door opening assembly. The door opening assembly includes a sprocket motor fixedly installed on the ground frame, a drive sprocket installed on the sprocket motor, several driven sprockets rotatably installed on the cross frame, and a chain wrapped around the drive sprocket and driven sprockets. The chain is provided with a connecting frame, and the connecting frame is connected to the slider at the top of the outer shell.

8. The LED mobile information display device according to claim 7, characterized in that: The top and bottom slide rails are bent and include an outer moving rail and a side yielding rail. The outer moving rail is perpendicular to the maintenance box on the door. The side yielding rail extends laterally from the outer end of the outer moving rail. The side of the chain near the top slide rail is bent in the same way as the path of the top slide rail. The length of the outer moving rail is greater than the thickness of the outer shell in the direction of the length of the outer moving rail; The slider is provided at the top of the housing and at least two at the bottom of the housing.

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