Digital media communication device for information and communication engineering

Abstract

The invention discloses a digital media transmission device for information and communication engineering, and relates to the technical field of information transmission, the digital media transmission device comprises a bottom plate, the bottom plate and a transverse plate are jointly provided with a media transmission adjusting assembly, the rotation of a rotating rod can drive a rotating shaft to rotate, and the rotation of the rotating shaft can drive a screw rod to rotate. A screw rod rotates to drive a moving disc to move back and forth in the vertical direction, a servo motor is started to drive a second rotating disc to rotate, the second rotating disc rotates to enable the moving disc to rotate through a telescopic rod, and a media fluctuation propagation assembly is arranged on the moving disc. The media fluctuation transmission assembly comprises a spherical disc, a motor, an L-shaped rod and a display screen which are movably connected to the movable disc, the motor is started to drive the spherical disc to swing up and down, the spherical disc swings up and down to drive the L-shaped rod to move up and down, and the L-shaped rod moves up and down to drive the display screen to move up and down.

Description

Technical Field

[0001] The present invention relates to the field of information dissemination technology, and in particular to a digital media dissemination device for information and communication engineering. Background Art

[0002] Information and Communication Engineering is a first-level discipline with two second-level disciplines. This comprehensive program encompasses a broad foundation of knowledge and a wide range of applications, covering numerous high-tech areas, including wireless communications, multimedia and image processing, electromagnetic fields and microwaves, medical X-ray digital imaging, array signal processing, phase-space wave propagation and imaging, and satellite mobile video. Digital media refers to information carriers that record, process, transmit, and acquire information in the form of binary numbers. These carriers include sensory media such as digitized text, graphics, images, sound, video, and animation, as well as the representational media that represent these sensory media, collectively referred to as logical media, and the physical media that store, transmit, and display logical media.

[0003] After searching, the invention patent with Chinese patent number CN113781915B discloses a digital media communication device used in information and communication engineering. Compared with the existing technology, the invention patent with Chinese patent number CN113781915B has a display screen fixedly connected to the upper side of the base, the display screen and the control center are matched, a heat sink is provided in the connecting groove, and a plurality of through holes are symmetrically provided on the upper side of the heat sink. Threaded rods are provided in the plurality of through holes, and the threaded rods pass through the through holes and cooperate with the rotating rod and the wire wheel to complete the length adjustment of the connecting line on the outside of the base, thereby reducing the excess length of the connecting line on the outside of the base, improving the utilization rate of the connecting line, and reducing the obstruction to other objects.

[0004] However, during actual use of the above-mentioned device, the display screen is fixed on the base. In the field of information and communication engineering, the dissemination of digital media content often needs to adapt to different scenarios and audience needs. The fixed display screen greatly limits the visual display of information, so that the audience can only obtain information from a specific perspective. Therefore, it is necessary to propose a digital media dissemination device for information and communication engineering. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that the display screen is fixed on a base. In the field of information and communication engineering, the dissemination of digital media content often needs to adapt to different scenarios and audience needs. The fixed display screen greatly limits the display angle and range of information, so that the audience can only obtain information from a specific perspective. A digital media dissemination device for information and communication engineering is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A digital media propagation device for information and communication engineering, comprising a bottom plate, an upper part of the bottom plate is movably connected with a cross plate, and a media propagation adjustment component is jointly arranged on the bottom plate and the cross plate. The media propagation adjustment component includes a rotating rod, a rotating shaft, a screw rod, a moving disk, a servo motor, a second rotating disk and a telescopic rod which are movably connected on the cross plate. The rotation of the rotating rod drives the rotation of the rotating shaft, the rotation of the rotating shaft drives the rotation of the screw rod, the rotation of the screw rod drives the moving disk to move back and forth in the vertical direction, the start of the servo motor drives the rotation of the second rotating disk, and the rotation of the second rotating disk drives the moving disk to rotate through the telescopic rod. A media fluctuation propagation component is arranged on the moving disk. The media fluctuation propagation component includes a spherical disk, a motor, an L-shaped rod and a display screen which are movably connected on the moving disk. The start of the motor drives the spherical disk to swing up and down, the up and down swing of the spherical disk drives the L-shaped rod to move up and down, and the up and down movement of the L-shaped rod drives the display screen to move up and down.

[0008] The above technical solution further includes:

[0009] A plurality of support columns are fixedly connected to one side of the bottom plate close to the cross plate, and the ends of the support columns away from the bottom plate are fixedly connected to the cross plate. The support columns mainly play a role in supporting the cross plate.

[0010] A U-shaped block is fixedly connected to one side of the cross plate close to the bottom plate. The number of the U-shaped blocks is two groups. The outer sides of the two groups of U-shaped blocks are jointly rotatably connected to the rotating rod. The U-shaped block is used to connect the cross plate and the rotating rod, and the rotating rod can rotate outside the U-shaped block.

[0011] A first bevel gear is fixedly connected to one end of the rotating rod close to the servo motor. A hollow tube is fixedly connected to the outside of the cross plate. The inside of the hollow tube is rotatably connected to the rotating shaft. A second bevel gear is fixedly connected to one end of the rotating shaft close to the bottom plate. The second bevel gear meshes with the first bevel gear. The first bevel gear meshes with the second bevel gear. The rotation of the first bevel gear drives the rotation of the second bevel gear, and the rotation of the second bevel gear drives the rotation of the rotating shaft.

[0012] One end of the rotating shaft away from the second bevel gear is fixedly connected to the screw rod. The screw rod is in threaded connection with a threaded tube. One end of the threaded tube away from the second bevel gear is movably connected to the moving disk. The rotation of the screw rod makes the threaded tube move back and forth in the vertical direction.

[0013] An L-shaped block is fixedly connected to one side of the cross plate close to the bottom plate. The outside of the L-shaped block is fixedly connected to the servo motor. The end of the output shaft of the servo motor is fixedly connected to a first rotating disk. The rotation of the end of the output shaft of the servo motor drives the rotation of the first rotating disk.

[0014] The outer side of the hollow tube is rotatably connected to the second rotating disk. A belt is sleeved on the outer sides of the second rotating disk and the first rotating disk. The rotation of the first rotating disk drives the belt to rotate. The side of the second rotating disk away from the cross plate is fixedly connected to the telescopic rod. The number of telescopic rods is two groups. The ends of the two groups of telescopic rods away from the second rotating disk are fixedly connected to the moving disk together.

[0015] A conical disk is fixedly connected to the side of the moving disk away from the cross plate. A connecting plate is fixedly connected to the outer side of the moving disk. One end of the connecting plate away from the moving disk is fixedly connected to a fixed disk. The connecting plate can support the fixed disk.

[0016] The side of the fixed disk close to the moving disk is fixedly connected to the motor. The end of the output shaft of the motor is fixedly connected to a first fixed rod. The first fixed rod is threadedly connected to the lead screw. The lead screw is threadedly connected to the second fixed rod. One end of the second fixed rod away from the lead screw is fixedly connected to the spherical disk. One end of the moving disk away from the cross plate is fixedly connected to a conical disk. The end of the conical disk away from the cross plate is movably connected to the spherical disk.

[0017] A plurality of flexible pads are movably connected to the side of the spherical disk away from the moving disk. The plurality of flexible pads are evenly distributed in a circular pattern along the spherical disk. One end of the flexible pad away from the spherical disk is fixedly connected to the L-shaped rod. A spring is fixedly connected to the outer side of the L-shaped rod. One end of the spring away from the L-shaped rod is fixedly connected to the fixed disk. The L-shaped rod is slidably connected to the fixed disk. One end of the L-shaped rod away from the flexible pad is fixedly connected to the display screen. The fixed disk can play a role in limiting the L-shaped rod. The spring mainly serves the purpose of buffering when the L-shaped rod moves up and down. The up and down movement of the L-shaped rod can drive the display screen to move up and down.

[0018] The present invention has the following beneficial effects:

[0019] 1. In the present invention, by setting the media transmission adjustment component, the rotation of the rotating rod drives the rotation of the rotating shaft. The rotation of the rotating shaft drives the rotation of the screw rod. The rotation of the screw rod drives the moving disk to move back and forth in the vertical direction. The start of the servo motor drives the rotation of the second rotating disk. The rotation of the second rotating disk causes the moving disk to rotate through the telescopic rod. Through the action of the moving disk and the second rotating disk, the display screen can be moved and rotated, effectively solving the situation that when digital media content is transmitted, the fixed display screen greatly limits the display angle and range of information, making the audience can only obtain information from a specific perspective.

[0020] 2. In the present invention, further, while the multiple display screens rotate through the moving disk, by providing a media fluctuation propagation component, the start of the motor will drive the spherical disk to swing up and down in a high-low manner. The up-and-down swing of the spherical disk will drive multiple L-shaped rods to move up and down, and the up-and-down movement of the multiple L-shaped rods will drive the multiple display screens to fluctuate up and down. The multiple display screens that fluctuate up and down can flexibly adjust the displayed content according to different scenarios and requirements, providing a more comfortable viewing experience for the audience. Especially in public places with a large flow of people, it can effectively reduce visual blind spots and ensure the comprehensive coverage of information. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a schematic diagram of the overall structure of a digital media propagation device for information and communication engineering proposed by the present invention;

[0022] Figure 2 FIG. is a schematic diagram of the overall bottom view structure of a digital media propagation device for information and communication engineering proposed by the present invention;

[0023] Figure 3 FIG. is a schematic diagram of the overall sectional structure of a digital media propagation device for information and communication engineering proposed by the present invention;

[0024] Figure 4 is Figure 1 a schematic enlarged view of the structure at A in;

[0025] Figure 5 is Figure 3 a schematic enlarged view of the structure at B in;

[0026] Figure 6 is Figure 3 a schematic enlarged view of the structure at C in;

[0027] Figure 7 is Figure 3 a schematic enlarged view of the structure at D in.

[0028] In the figure: 1, bottom plate; 2, support column; 3, cross plate; 4, U-shaped block; 5, rotating rod; 6, first bevel gear; 7, second bevel gear; 8, rotating shaft; 9, hollow tube; 10, screw rod; 11, threaded tube; 12, moving disk; 13, L-shaped block; 14, servo motor; 15, first rotating disk; 16, belt; 17, second rotating disk; 18, telescopic rod; 19, conical disk; 20, spherical disk; 21, connecting plate; 22, fixed disk; 23, motor; 24, first fixing rod; 25, second fixing rod; 26, lead screw; 27, flexible pad; 28, L-shaped rod; 29, spring; 30, display screen. DETAILED DESCRIPTION OF THE INVENTION

[0029] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] As Figures 1 - 7 shown, a digital media propagation device for information and communication engineering proposed by the present invention includes a bottom plate 1. A transverse plate 3 is movably connected to the upper part of the bottom plate 1. A media propagation adjustment component is jointly arranged on the bottom plate 1 and the transverse plate 3. The media propagation adjustment component includes a rotating rod 5, a rotating shaft 8, a screw rod 10, a moving disk 12, a servo motor 14, a second rotating disk 17 and a telescopic rod 18 that are movably connected to the transverse plate 3. The rotation of the rotating rod 5 will drive the rotation of the rotating shaft 8. The rotation of the rotating shaft 8 will drive the rotation of the screw rod 10. The rotation of the screw rod 10 will drive the moving disk 12 to move back and forth in the vertical direction. The start of the servo motor 14 will drive the rotation of the second rotating disk 17. The rotation of the second rotating disk 17 will drive the moving disk 12 to rotate through the telescopic rod 18. A media fluctuation propagation component is arranged on the moving disk 12. The media fluctuation propagation component includes a spherical disk 20, a motor 23, an L-shaped rod 28 and a display screen 30 that are movably connected to the moving disk 12. The start of the motor 23 will drive the spherical disk 20 to swing up and down. The up and down swing of the spherical disk 20 will drive the up and down movement of the L-shaped rod 28. The up and down movement of the L-shaped rod 28 will drive the up and down movement of the display screen 30.

[0032] A plurality of support columns 2 are fixedly connected to one side of the bottom plate 1 close to the transverse plate 3. One end of the support column 2 away from the bottom plate 1 is fixedly connected to the transverse plate 3. The support column 2 mainly serves to support the transverse plate 3.

[0033] A U-shaped block 4 is fixedly connected to one side of the transverse plate 3 close to the bottom plate 1. The number of the U-shaped blocks 4 is two groups. The outside of the two groups of U-shaped blocks 4 is jointly rotatably connected to the rotating rod 5. The function of the U-shaped block 4 is to connect the transverse plate 3 and the rotating rod 5. The rotating rod 5 can rotate outside the U-shaped block 4.

[0034] One end of the rotating rod 5 close to the servo motor 14 is fixedly connected to a first bevel gear 6. A hollow tube 9 is fixedly connected to the outside of the transverse plate 3. The inside of the hollow tube 9 is rotatably connected to the rotating shaft 8. One end of the rotating shaft 8 close to the bottom plate 1 is fixedly connected to a second bevel gear 7. The second bevel gear 7 is meshed with the first bevel gear 6. The first bevel gear 6 and the second bevel gear 7 are meshed with each other. The rotation of the first bevel gear 6 will drive the rotation of the second bevel gear 7. The rotation of the second bevel gear 7 will drive the rotation of the rotating shaft 8.

[0035] One end of the rotating shaft 8 away from the second bevel gear 7 is fixedly connected to the screw rod 10. The screw rod 10 is threadedly connected to the threaded tube 11. One end of the threaded tube 11 away from the second bevel gear 7 is movably connected to the moving plate 12. The rotation of the screw rod 10 will cause the threaded tube 11 to move back and forth in the vertical direction.

[0036] On the side of the horizontal plate 3 close to the bottom plate 1, there is a fixedly connected L-shaped block 13. The outside of the L-shaped block 13 is fixedly connected to the servo motor 14. The end of the output shaft of the servo motor 14 is fixedly connected to the first rotating disk 15. The rotation of the end of the output shaft of the servo motor 14 will drive the first rotating disk 15 to rotate.

[0037] The outside of the hollow tube 9 is rotatably connected to the second rotating disk 17. A belt 16 is sleeved on the outside of the second rotating disk 17 and the first rotating disk 15 together. The rotation of the first rotating disk 15 will drive the belt 16 to rotate. One side of the second rotating disk 17 away from the horizontal plate 3 is fixedly connected to the telescopic rod 18. The number of telescopic rods 18 is two groups. The ends of the two groups of telescopic rods 18 away from the second rotating disk 17 are fixedly connected to the moving plate 12 together.

[0038] In this embodiment, the rotation of the rotating rod 5 drives the rotation of the rotating shaft 8. The rotation of the rotating shaft 8 drives the rotation of the screw rod 10. The rotation of the screw rod 10 drives the moving disk 12 to move back and forth in the vertical direction. The start of the servo motor 14 drives the rotation of the second rotating disk 17. The rotation of the second rotating disk 17 causes the moving disk 12 to rotate through the telescopic rod 18. Through the actions of the moving disk 12 and the second rotating disk 17, the display screen can be moved and rotated. The specific implementation method is as follows: The function of the support column 2 is to connect the bottom plate 1 and the support column 2. The support column 2 mainly plays the role of supporting the cross plate 3. The function of the U-shaped block 4 is to connect the cross plate 3 and the rotating rod 5. The rotating rod 5 can rotate outside the U-shaped block 4. The rotation of the rotating rod 5 can drive the rotation of the first bevel gear 6. Since the first bevel gear 6 and the second bevel gear 7 are meshed with each other, the rotation of the first bevel gear 6 drives the rotation of the second bevel gear 7. The rotation of the second bevel gear 7 drives the rotation of the rotating shaft 8. The rotation of the rotating shaft 8 drives the rotation of the screw rod 10. Since the screw rod 10 is in threaded connection with the threaded tube 11, the rotation of the screw rod 10 causes the threaded tube 11 to move back and forth in the vertical direction. The back-and-forth movement of the threaded tube 11 drives the moving disk 12 to move back and forth in the vertical direction. The rotating shaft 8 can rotate inside the hollow tube 9. The function of the hollow tube 9 is to connect the cross plate 3 and the rotating shaft 8, and to connect the cross plate 3 and the second rotating disk 17. The second rotating disk 17 can rotate outside the hollow tube 9. The function of the L-shaped block 13 is to connect the cross plate 3 and the servo motor 14. When the servo motor 14 is started, the rotation of the end of the output shaft of the servo motor 14 drives the rotation of the first rotating disk 15. The rotation of the first rotating disk 15 drives the rotation of the belt 16. The rotation of the belt 16 drives the rotation of the second rotating disk 17. The rotation of the second rotating disk 17 drives the rotation of the two telescopic rods 18. The rotation of the telescopic rod 18 drives the rotation of the moving disk 12.

[0039] Embodiment Two

[0040] As Figures 1 - 7 shown, based on Embodiment One, a conical disk 19 is fixedly connected to the side of the moving disk 12 away from the cross plate 3. A connecting plate 21 is fixedly connected to the outside of the moving disk 12. One end of the connecting plate 21 away from the moving disk 12 is fixedly connected to a fixed disk 22. The connecting plate 21 can support the fixed disk 22.

[0041] The fixed disk

[0042] A plurality of flexible pads 27 are movably connected to the side of the spherical disk 20 away from the moving disk 12. The plurality of flexible pads 27 are arranged in a circumferentially uniform distribution along the spherical disk 20. One end of the flexible pad 27 away from the spherical disk 20 is fixedly connected to an L-shaped rod 28. A spring 29 is fixedly connected to the outside of the L-shaped rod 28. One end of the spring 29 away from the L-shaped rod 28 is fixedly connected to a fixed disk 22. The L-shaped rod 28 is slidably connected to the fixed disk 22. One end of the L-shaped rod 28 away from the flexible pad 27 is fixedly connected to a display screen 30. The fixed disk 22 can play a role in limiting the L-shaped rod 28. The spring 29 mainly serves to buffer the up and down movement of the L-shaped rod 28. The up and down movement of the L-shaped rod 28 can drive the display screen 30 to move up and down.

[0043] In this embodiment, the start of the motor 23 will drive the spherical disk 20 to swing up and down. The up and down swing of the spherical disk 20 will drive the L-shaped rod 28 to move up and down. The up and down movement of the L-shaped rod 28 will drive the display screen 30 to move up and down. The specific implementation method is as follows. Before use, the inclination angle of the spherical disk 20 can be adjusted by adjusting the positional relationship between the first fixing rod 24 and the second fixing rod 25. When the motor 23 is started, the rotation of the end of the output shaft of the motor 23 will drive the first fixing rod 24 to rotate. The rotation of the first fixing rod 24 will drive the second fixing rod 25 to rotate. The lead screw 26 can fix the first fixing rod 24 and the second fixing rod 25. The rotation of the second fixing rod 25 can drive the spherical disk 20 to rotate. The rotation of the spherical disk 20 will drive the L-shaped rod 28 to move up and down. The L-shaped rod 28 is slidably connected to the fixed disk 22. The fixed disk 22 can play a role in limiting the L-shaped rod 28. The spring 29 mainly serves to buffer the up and down movement of the L-shaped rod 28. The up and down movement of the L-shaped rod 28 can drive the display screen 30 to move up and down. The up and down fluctuating display screen can flexibly adjust the display angle according to different scenarios and requirements, providing a more comfortable viewing experience for the audience.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in 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 digital media dissemination device for information and communication engineering, comprising a bottom plate (1), characterized in that, A cross plate (3) is movably connected to the upper part of the bottom plate (1). A media transmission adjustment component is jointly arranged on the bottom plate (1) and the cross plate (3). The media transmission adjustment component includes a rotating rod (5), a rotating shaft (8), a screw rod (10), a moving disk (12), a servo motor (14), a second rotating disk (17) and a telescopic rod (18) which are movably connected to the cross plate (3). The rotation of the rotating rod (5) drives the rotation of the rotating shaft (8). The rotation of the rotating shaft (8) drives the rotation of the screw rod (10). The rotation of the screw rod (10) drives the moving disk (12) to move back and forth in the vertical direction. The start of the servo motor (14) drives the rotation of the second rotating disk (17). The rotation of the second rotating disk (17) makes the moving disk (12) rotate through the telescopic rod (18). A media fluctuation transmission component is arranged on the moving disk (12). The media fluctuation transmission component includes a spherical disk (20), a motor (23), an L-shaped rod (28) and a display screen (30) which are movably connected to the moving disk (12). The start of the motor (23) drives the spherical disk (20) to swing up and down. The up and down swing of the spherical disk (20) drives the L-shaped rod (28) to move up and down. The up and down movement of the L-shaped rod (28) drives the display screen (30) to move up and down.

2. The digital media transmission device for information and communication engineering according to claim 1, characterized in that A plurality of support columns (2) are fixedly connected to one side of the bottom plate (1) close to the cross plate (3). One end of the support column (2) far from the bottom plate (1) is fixedly connected to the cross plate (3).

3. A digital media dissemination device for information and communication engineering according to claim 1, characterized in that, A U-shaped block (4) is fixedly connected to one side of the cross plate (3) close to the bottom plate (1). The number of the U-shaped blocks (4) is two groups. The outside of the two groups of U-shaped blocks (4) is jointly rotatably connected to the rotating rod (5).

4. A digital media dissemination device for information and communication engineering according to claim 1, characterized in that, A first bevel gear (6) is fixedly connected to one end of the rotating rod (5) close to the servo motor (14). A hollow tube (9) is fixedly connected to the outside of the cross plate (3). The inside of the hollow tube (9) is rotatably connected to the rotating shaft (8). A second bevel gear (7) is fixedly connected to one end of the rotating shaft (8) close to the bottom plate (1). The second bevel gear (7) is meshed with the first bevel gear (6).

5. An information and communication engineering digital media transmission device according to claim 1, characterized in that, One end of the rotating shaft (8) far from the second bevel gear (7) is fixedly connected to the screw rod (10). The screw rod (10) is in threaded connection with a threaded tube (11). One end of the threaded tube (11) far from the second bevel gear (7) is movably connected to the moving disk (12).

6. An information and communication engineering digital media dissemination device according to claim 1, characterized in that, An L-shaped block (13) is fixedly connected to one side of the cross plate (3) close to the bottom plate (1). The outside of the L-shaped block (13) is fixedly connected to the servo motor (14). A first rotating disk (15) is fixedly connected to the end of the output shaft of the servo motor (14).

7. An information and communication engineering digital media transmission device according to claim 4, characterized in that The outer side of the hollow tube (9) is rotatably connected to the second rotating disc (17). A belt (16) is sleeved on the outer sides of the second rotating disc (17) and the first rotating disc (15) together. The side of the second rotating disc (17) away from the cross plate (3) is fixedly connected to the telescopic rod (18). The number of the telescopic rods (18) is two groups. The ends of the two groups of telescopic rods (18) away from the second rotating disc (17) are fixedly connected to the moving disc (12) together.

8. An information and communication engineering digital media transmission device according to claim 1, characterized in that A conical disc (19) is fixedly connected to the side of the moving disc (12) away from the cross plate (3). A connecting plate (21) is fixedly connected to the outer side of the moving disc (12). One end of the connecting plate (21) away from the moving disc (12) is fixedly connected to a fixed disc (22).

9. An information and communication engineering digital media dissemination device according to claim 8, characterized in that, The side of the fixed disc (22) close to the moving disc (12) is fixedly connected to a motor (23). The end of the output shaft of the motor (23) is fixedly connected to a first fixing rod (24). The first fixing rod (24) is threadedly connected to a lead screw (26). The lead screw (26) is threadedly connected to a second fixing rod (25). The end of the second fixing rod (25) away from the lead screw (26) is fixedly connected to a spherical disc (20). A conical disc (19) is fixedly connected to the end of the moving disc (12) away from the cross plate (3). The end of the conical disc (19) away from the cross plate (3) is movably connected to the spherical disc (20).

10. A digital media dissemination device for information and communication engineering according to claim 1, characterized in that, A plurality of flexible pads (27) are movably connected to the side of the spherical disc (20) away from the moving disc (12). The plurality of flexible pads (27) are arranged in a circumferentially uniform distribution along the spherical disc (20). One end of the flexible pad (27) away from the spherical disc (20) is fixedly connected to an L-shaped rod (28). A spring (29) is fixedly connected to the outer side of the L-shaped rod (28). One end of the spring (29) away from the L-shaped rod (28) is fixedly connected to the fixed disc (22). The L-shaped rod (28) is slidably connected to the fixed disc (22). One end of the L-shaped rod (28) away from the flexible pad (27) is fixedly connected to a display screen (30).

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