Display screen
Through the T-shaped floor tiles pedal-driven up and down movement and automatic cleaning system, the problem of difficult attention and high cleaning costs for outdoor advertising screens is solved, and efficient publicity effects and energy-saving automatic cleaning are achieved.
Patent Information
- Application Number
- CN202411496940.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-01-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing large outdoor advertising screens are difficult to attract the attention of pedestrians, and require frequent manual cleaning, resulting in low publicity effects and high cleaning costs.
A display display screen is designed to move up and down through the pedal of T-shaped floor tiles, combining air flow and the use of solenoid valves to automatically clean up dust, use lever system and return spring to achieve movement without external energy supply, and dissipate heat Fins and blade monitoring mechanisms improve cleaning efficiency.
It improves the publicity effect of the display, reduces the frequency and cost of manual cleaning, and at the same time realizes the energy-saving and automated cleaning process, ensuring the normal working temperature and clean state of the display.
Smart Images
Figure CN119267721A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of display screens, and in particular to a display screen. Background Art
[0002] When companies promote their products, playing advertisements on outdoor display screens is a common display method. Outdoor display screens are generally set up in the squares of shopping malls or streets with large traffic, so that pedestrians can gain a certain understanding of the company's products by watching the promotional videos displayed on the screens, and are guided to have a further in-depth understanding.
[0003] In the prior art, large advertising screens are often fixed on the ground. When pedestrians pass by, they generally know that it is a device for playing advertisements. Therefore, it cannot attract further attention of pedestrians, resulting in mediocre publicity effects of existing large advertising screens. Moreover, advertising screens are often placed outdoors, and dust or other debris will adhere to their surfaces, requiring regular cleaning, which is labor-intensive and has high personnel costs. Summary of the invention
[0004] The purpose of the present invention is to solve the problems in the prior art and to provide a display screen.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A display screen comprises a hollow base, the base is fixedly arranged in the ground, a sliding sleeve is passed through and fixedly connected to the top wall of the base, a slider is sealingly and slidably connected in the sliding sleeve, a fixing frame is fixedly connected to the upper surface of the slider, a display screen is fixedly connected to the inner wall of the fixing frame, and an interactive mechanism is arranged in the base; The interactive mechanism includes a connecting rod, which is rotatably connected to the inner wall of the base through a bearing, and the connecting rod is passed through and fixedly connected to a lever plate, and a through hole is opened in the top wall of the base, and a T-shaped floor tile is slidably connected in the through hole, and the lower surface of the T-shaped floor tile is abutted against the upper surface of the lever plate, and the sliding sleeve is passed through and slidably connected to a plurality of top columns, one end of the top column extends through the sliding sleeve and is fixedly connected to the bottom wall of the slider, and the other end extends through the base and is abutted against the upper surface of the lever plate, the inner wall of the base is fixedly connected to a fixing plate, the T-shaped floor tile is slidably connected to the fixing plate, and a plurality of reset springs are fixedly connected between the T-shaped floor tile and the fixing plate.
[0006] Furthermore, a cleaning mechanism is provided in the fixed frame, and the cleaning mechanism includes an air storage chamber opened in the top wall of the fixed frame, a sliding plate is sealingly and slidably connected in the air storage chamber, a force storage spring is fixedly connected between the sliding plate and the inner end wall of the air storage chamber, an exhaust pipe is fixedly connected through the sliding sleeve, the exhaust pipe is slidably connected through the fixed frame and extends into the air storage chamber, a plurality of air inlet holes are provided on the side wall of the sliding sleeve, a plurality of injection pipes are fixedly connected through the fixed frame, an electromagnetic valve is provided in the injection pipe, a delay switch is fixedly connected to the inner end wall of the air storage chamber, and the delay switch is electrically connected to the electromagnetic valve through a wire.
[0007] Furthermore, a plurality of heat dissipation fins are fixedly connected to the side wall of the display screen, the exhaust pipe is penetrated and fixedly connected with the heat dissipation fins, and the heat dissipation fins and the exhaust pipe are both made of copper alloy.
[0008] Furthermore, one-way valves are provided in the air inlet and the exhaust pipe.
[0009] Furthermore, a monitoring mechanism is provided in the fixed frame, and the monitoring mechanism includes a dust exhaust hole and a cavity opened in the bottom wall of the fixed frame, the inner wall of the dust exhaust hole is rotatably connected to a rotating rod through a bearing, and the side wall of the rotating rod is fixedly connected to a plurality of fan blades, one of the side walls of the fan blades is fixedly connected to a conductive rod, a permanent magnet plate is provided in the bottom wall of the fixed frame, an electric push rod is fixedly connected to the bottom wall of the cavity, and the electric push rod is electrically connected to the conductive rod through a wire, a button switch is fixedly connected to the top wall of the cavity, an indicator light is fixedly connected to the upper surface of the fixed frame, and the button switch and the indicator light are electrically connected through a wire.
[0010] Furthermore, a sealing ring is provided at the sliding connection between the T-shaped floor tile and the base.
[0011] The present invention has the following advantages: 1. When pedestrians pass by the device, they step on the T-shaped floor tiles, and then the lever plate is set, so that the fixed frame drives the display screen to move upward. When pedestrians leave the T-shaped floor tiles, under the action of gravity and the reset spring, the fixed frame drives the display screen to move downward and reset. When pedestrians pass by, the display screen moves up and down. People inherently think that the display screen is fixed and will not move. At this time, the display screen moves, which can attract the attention of pedestrians and turn their eyes to the display screen, thereby greatly improving the publicity effect of the display screen; 2. When the display screen moves up and down, air is sucked into the sliding sleeve through the air inlet hole, and then pumped into the air storage chamber through the exhaust pipe, so that the sliding plate slides and compresses the force storage spring, and the force is stored through the force storage spring until the sliding plate contacts the delay switch. At this time, the solenoid valve opens, and the accumulated pressurized air is ejected through the jet pipe, which impacts the display screen and blows off the dust and debris attached to its surface, so as to prevent dust and debris from affecting the display effect and reduce the cost of frequent manual cleaning; 3. When the display screen moves up and down to absorb and store air, the heat generated by the display screen during operation is discharged through the heat dissipation fins, and then the heat discharged by the heat dissipation fins is taken away through the air flow in the exhaust pipe, thereby playing a certain heat dissipation role on the display screen and ensuring its normal working temperature; 4. Through the setting of the dust discharge hole, the air that impacts the screen will flow along the screen and then enter the dust discharge hole. The air flow impacts the fan blades, causing the fan blades to rotate around the rotating rod. The amount of dust and impurities on the screen determines the power loss when the air flows through, that is, determines the rotation speed of the fan blades. The rotation speed of the fan blades determines the size of the current generated on the conductive rod, thereby determining the extension length of the electric push rod, and ultimately determines whether the indicator light is on. The cleaning staff can observe the indicator light to understand the cleanliness of the display screen and decide whether manual cleaning is needed; 5. The present invention does not require external energy supply during cleaning, but relies on pedestrian movement for energy supply, which is more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 A schematic diagram of the structure of a display screen proposed by the present invention; Figure 2 for Figure 1 A in the enlarged view; Figure 3 for Figure 1 The enlarged view of point B in the figure; Figure 4 for Figure 1 Cross-sectional view at CC in ; Figure 5 A side view of a display screen proposed by the present invention; Figure 6 The present invention is a schematic diagram of the circuit connection of an electric push rod in a display screen.
[0013] In the figure: 1 base, 2 sliding sleeve, 3 slider, 4 fixed frame, 5 display screen, 6 T-shaped floor tile, 7 connecting rod, 8 lever plate, 9 top column, 10 fixed plate, 11 return spring, 12 air inlet, 13 exhaust pipe, 14 air storage cavity, 15 sliding plate, 16 storage spring, 17 jet pipe, 18 solenoid valve, 19 delay switch, 20 heat dissipation fin, 21 dust exhaust hole, 22 rotating rod, 23 fan blade, 24 conductive rod, 25 permanent magnet plate, 26 cavity, 27 electric push rod, 28 button switch, 29 indicator light, 30 through hole. DETAILED DESCRIPTION
[0014] Reference Figure 1-6 A display screen includes a hollow base 1, the base 1 is fixedly arranged in the ground, a sliding sleeve 2 is fixedly connected to the top wall of the base 1, a slider 3 is sealed and slidably connected in the sliding sleeve 2, a fixed frame 4 is fixedly connected to the upper surface of the slider 3, a display screen 5 is fixedly connected to the inner wall of the fixed frame 4, and an interactive mechanism is arranged in the base 1; The interactive mechanism includes a connecting rod 7, which is rotatably connected to the inner wall of the base 1 through a bearing, and the connecting rod 7 is fixedly connected to a lever plate 8 through the connecting rod 7, and a through hole 30 is opened on the top wall of the base 1, and a T-shaped floor tile 6 is slidably connected in the through hole 30, and the lower surface of the T-shaped floor tile 6 is against the upper surface of the lever plate 8, and the sliding sleeve 2 is slidably connected to a plurality of top columns 9, and a sealing gasket is provided at the sliding connection between the top column 9 and the sliding sleeve 2 to ensure the sealing of the connection between the two, one end of the top column 9 extends through the sliding sleeve 2 and is fixedly connected to the bottom wall of the slider 3, and the other end extends through the base 1 and is against the upper surface of the lever plate 8, and the inner wall of the base 1 is fixedly connected to a fixing plate 10, and the T-shaped floor tile 6 is slidably connected to the fixing plate 10, and the setting of the fixing plate 10 ensures that the T-shaped floor tile 6 can move vertically up and down, and a plurality of reset springs 11 are fixedly connected between the T-shaped floor tile 6 and the fixing plate 10, and the connecting rod 7 and The distance between the contact points of the T-shaped floor tile 6 and the lever plate 8 is greater than the distance between the contact points of the connecting rod 7 and the top column 9 and the lever plate 8. A lever system is formed by the T-shaped floor tile 6, the connecting rod 7 and the top column 9, and the power arm of the lever system is greater than the resistance arm. It is a labor-saving lever, that is, the display screen 5 can be lifted up by the body weight. When pedestrians pass by the device, the pedestrians step on the T-shaped floor tile 6, and then the lever plate 8 is set, so that the fixed frame 4 drives the display screen 5 to move upward. When the pedestrians leave the T-shaped floor tile, under the action of gravity and the reset spring 11, the fixed frame 4 drives the display screen 5 to move downward and reset. When pedestrians pass by, the display screen 5 moves up and down. People inherently believe that the display screen 5 is fixed and will not move. At this time, the display screen 5 moves, which can attract the attention of pedestrians and turn their eyes to the display screen, thereby greatly improving the publicity effect of the display screen.
[0015] It is worth mentioning that when children or adults with strong curiosity pass by the T-shaped floor tiles 6, they find that after stepping on the T-shaped floor tiles 6, the display screen 5 can be moved up and down. They will repeatedly step on the T-shaped floor tiles 6, so that the display screen 5 moves up and down repeatedly. The frequent up and down movement of the display screen 5 will attract the attention of more people. As the number of people watching the display screen 5 continues to increase, the group effect will be stimulated, and more people will gather in front of the display screen 5. The more people gather, the more attention will be attracted, so that the content of the display screen 5 can be paid attention to by more people, further improving its publicity effect.
[0016] A cleaning mechanism is provided in the fixed frame 4, and the cleaning mechanism includes an air storage chamber 14 opened in the top wall of the fixed frame 4, such as Figure 2 As shown, the part of the air storage chamber 14 located on the left side of the sliding plate 15 is communicated with the outside, ensuring that the sliding plate 15 can slide freely inside it, the air storage chamber 14 is sealed and slidably connected with the sliding plate 15, and a sealing gasket is provided at the sliding connection between the sliding plate 15 and the inner side wall of the air storage chamber 14 to ensure the sealing of the left and right sides of the sliding plate 15, and a storage spring 16 is fixedly connected between the sliding plate 15 and the inner end wall of the air storage chamber 14, the sliding sleeve 2 is penetrated and fixedly connected with the exhaust pipe 13, the exhaust pipe 13 is penetrated and slidably connected with the fixed frame 4 and extends into the air storage chamber 14, a plurality of air inlet holes 12 are opened on the side wall of the sliding sleeve 2, and a plurality of air injection pipes 17 are penetrated and fixedly connected with the fixed frame 4, as shown in FIG. Figure 2 As shown, one end of the air jet pipe 17 extends into the air storage chamber 14, and the other end is tilted toward the display screen 5, so that the air ejected therefrom can flow along the surface of the display screen 5, and the dust and debris are blown off by the air impact force, thereby achieving a cleaning effect. An electromagnetic valve 18 is arranged in the air jet pipe 17, and the electromagnetic valve 18 is a normally closed electromagnetic valve, which is opened by power. A delay switch 19 is fixedly connected to the inner end wall of the air storage chamber 14, and the delay switch 19 is electrically connected to the electromagnetic valve 18 through a wire. When the delay switch 19 is pressed, the electromagnetic valve 18 can be energized for a certain period of time. This is a prior art and will not be described in detail here. During the up and down movement of the display screen 5, air is sucked into the sliding sleeve 2 through the air inlet 12, and then pumped into the air storage chamber 14 through the exhaust pipe 13, so that the sliding plate 15 slides and compresses the force storage spring 16, and force is stored through the force storage spring 16 until the sliding plate 15 contacts the delay switch 19. At this time, the solenoid valve 18 opens, and the accumulated pressurized air is ejected through the jet pipe 17, and the air impacts the screen of the display screen 5 to blow off the dust and debris attached to its surface, thereby preventing dust and debris from affecting the display effect and avoiding the high labor intensity of frequent cleaning of the display screen.
[0017] A plurality of heat dissipation fins 20 are fixedly connected to the side wall of the display screen 5, and the exhaust pipe 13 is fixedly connected to the heat dissipation fins 20 through the exhaust pipe 13. Both the heat dissipation fins 20 and the exhaust pipe 13 are made of copper alloy, which has better thermal conductivity. When the display screen 5 moves up and down to absorb and store air, the heat generated when the display screen is working is discharged through the heat dissipation fins 20, and then the heat discharged by the heat dissipation fins 20 is taken away through the air flow in the exhaust pipe 13, thereby playing a certain heat dissipation role on the display screen 5 and ensuring its normal working temperature.
[0018] One-way valves are provided in both the air inlet 12 and the exhaust pipe 13 . The one-way valve in the air inlet 12 only allows air to enter the sleeve 2 from the outside, and the one-way valve in the exhaust pipe 13 only allows air to enter the air storage chamber 14 from the sleeve 2 .
[0019] A monitoring mechanism is provided in the fixed frame 4, and the monitoring mechanism includes a dust discharge hole 21 and a cavity 26 provided in the bottom wall of the fixed frame 4. Figure 3 As shown, the dust discharge hole 21 is L-shaped, and the air that impacts the screen can flow along the screen and then enter the dust discharge hole 21, so that the blown dust and debris are discharged through the dust discharge hole 21. The inner wall of the dust discharge hole 21 is rotatably connected to a rotating rod 22 through a bearing, and the side wall of the rotating rod 22 is fixedly connected to a plurality of fan blades 23, one of the fan blades 23 The side wall is fixedly connected to a conductive rod 24, and a permanent magnetic plate 25 is arranged in the bottom wall of the fixed frame 4. The conductive rod 24 can cut the magnetic flux of the permanent magnetic plate 25 when it rotates to generate an induced current. An electric push rod 27 is fixedly connected to the bottom wall of the cavity 26. The electric push rod 27 is a servo electric push rod, and its extension length can change with the size of the current passing through it, and it automatically retracts after power failure. It is a prior art and will not be described in detail here. The electric push rod 27 is electrically connected to the conductive rod 24 through a wire, such as Figure 6As shown, the conductive rod 24 is connected in series with a diode and then connected in series with the electric push rod 27, so that when the conductive rod 24 generates an induced current, only current in one direction can flow into the electric push rod 27. A button switch 28 is fixedly connected to the top wall of the cavity 26, and an indicator light 29 is fixedly connected to the upper surface of the fixed frame 4. The button switch 28 and the indicator light 29 are electrically connected through a wire. After the button switch 28 is pressed, the indicator light 29 can be lit. After the air impacts the display screen 5, dust and impurities are blown off. The amount of dust and impurities on the screen determines the power loss when the air flows through, that is, determines the speed of the airflow entering the dust exhaust hole 21. The speed impacts the fan blade 23, causing the fan blade 23 to rotate. The amount of dust determines the fan blade 23. Rotation speed: From E=BLV, it can be known that the rotation speed of the fan blade 23 determines the speed at which the conductive rod 24 cuts the magnetic flux lines of the permanent magnet plate 25, that is, it determines the magnitude of the current generated on the conductive rod 24, thereby determining the extension length of the electric push rod 27. When there is less dust and impurities, the fan blade 23 rotates faster, and the electric push rod 27 extends longer, which can trigger the button switch 28 and light up the indicator light 29. When there is more dust and impurities, the air flow speed entering the dust exhaust hole 21 is slower, that is, the extension length of the electric push rod 27 is not enough to contact the button switch 28. At this time, the indicator light 29 does not light up for a long time. The cleaning staff can understand the cleanliness of the display screen by observing the indicator light 29 and decide whether manual cleaning is needed.
[0020] A sealing ring is provided at the sliding connection between the T-shaped floor tile 6 and the base 1, and the sealing ring ensures the sealing of the sliding connection between the T-shaped floor tile 6 and the base 1, thereby preventing rainwater from leaking into the base 1 through the connection and affecting its internal structure.
[0021] In the present invention, when a pedestrian passes by the device, he steps on the T-shaped floor tile 6, which moves downward and pushes the lever plate 8, so that the lever plate 8 rotates, the left end descends, and the right end rises. The rise of the right end of the lever plate 8 causes the top column 9 to rise together, and the top column 9 drives the slider 3 to rise, and the slider 3 drives the fixed frame 4 to rise, so that the display screen 5 in the fixed frame 4 rises together. When the pedestrian leaves the T-shaped floor tile 6, the display screen 5 is reset under the action of the reset spring 11 and the gravity of the display screen 5 itself, that is, when the pedestrian passes by the display screen 5, the display screen 5 will move up and down, and the inherent thinking of the display screen 5 is that it is fixed. At this time, the display screen 5 moves, which will definitely attract the attention of passers-by, so that they turn their eyes to the screen to watch the content played on the display screen 5, thereby improving the publicity effect of the display screen.
[0022] During the up and down reciprocating motion of the display screen 5, the up and down reciprocating motion of the slider 3 draws outside air into the sliding sleeve 2 through the air inlet 12, and then pumps the inhaled air into the air storage chamber 14 through the exhaust pipe 13. When the air enters the air storage chamber 14 through the exhaust pipe 13, the heat dissipated by the heat sink 20 is taken away by the flow of air, which has a certain heat dissipation effect on the display screen 5.
[0023] As the air continuously enters the air storage chamber 14, the sliding plate 15 continuously moves to the left and compresses the force storage spring 16, and energy is accumulated through the elastic force of the force storage spring 16. As the sliding plate 15 continuously moves, it moves until it contacts the delay switch 19, at which time the delay switch 19 is triggered, so that the solenoid valve 18 is powered on and opened for a period of time. At this time, the accumulated pressure is released, and air with a certain pressure is sprayed through the air injection pipe 17 and sprayed onto the surface of the display screen 5, and the dust and impurities on the surface are blown off by the pressurized air. After a period of time, the solenoid valve 18 is powered off and closed again, and continues to accumulate air, waiting to be opened next time.
[0024] The air ejected from the air jet 17 blows off the dust and impurities on the surface of the display screen 5 while flowing along the surface of the display screen 5 until the impurities and dust are brought into the dust discharge hole 21, and the blown impurities and dust are discharged through the dust discharge hole 21. At the same time, the air entering the dust discharge hole 21 impacts the fan blade 23, causing the fan blade 23 to rotate. The amount of dust and impurities on the screen determines the power loss when the air flows through, that is, determines the speed of the airflow entering the dust discharge hole 21. The speed impacts the fan blade 23, causing the fan blade 23 to rotate. The amount of dust determines the rotation speed of the fan blade 23. It can be seen from E=BLV that the rotation speed of the fan blade 23 determines the speed at which the conductive rod 24 cuts the magnetic flux lines of the permanent magnet plate 25, that is, determines the size of the current generated on the conductive rod 24, thereby determining the extension length of the electric push rod 27. When the conductive rod 24 rotates to the left side of the rotating rod 22, due to the setting of the diode, the current cannot pass into the electric push rod 27, causing it to be powered off and retracted.
[0025] When there is less dust and impurities, the fan blade 23 rotates quickly and the electric push rod 27 extends to a longer length, which can trigger the button switch 28 and light up the indicator light 29. When there is more dust and impurities, the air flow speed entering the dust exhaust hole 21 is slow, so that the electric push rod 27 is not extended long enough to contact the button switch 28.
[0026] That is, during the dust removal process, if the indicator light 29 lights up, turns off, and then lights up again, it means that the dust and impurities on the screen can be cleaned by the cleaning mechanism. If the indicator light 29 is always off, it means that there is a lot of dust and impurities on the surface of the display screen 5, and the cleaning mechanism may not be able to clean it effectively, and it needs to be cleaned.
Claims
1. A display screen, comprising a hollow base (1), wherein the base (1) is fixedly arranged in the ground, and characterized in that: A sliding sleeve (2) is fixedly connected to the top wall of the base (1), a sliding block (3) is sealingly and slidably connected inside the sliding sleeve (2), a fixing frame (4) is provided on the upper surface of the sliding block (3), a display screen (5) is fixedly connected to the inner wall of the fixing frame (4), and an interactive mechanism is provided inside the base (1); The interactive mechanism comprises a connecting rod (7), wherein the connecting rod (7) is rotatably connected to the inner side wall of the base (1) via a bearing, the connecting rod (7) is penetrated and fixedly connected to a lever plate (8), the top wall of the base (1) is provided with a through hole (30), a T-shaped floor tile (6) is slidably connected in the through hole (30), the lower surface of the T-shaped floor tile (6) is against the upper surface of the lever plate (8), the sliding sleeve (2) is penetrated and slidably connected to a plurality of top columns (9), one end of the top column (9) extends through the sliding sleeve (2) and is fixedly connected to the bottom wall of the slider (3), and the other end extends through the base (1) and is against the upper surface of the lever plate (8), the inner side wall of the base (1) is fixedly connected to a fixing plate (10), the T-shaped floor tile (6) is penetrated and slidably connected to the fixing plate (10), and a plurality of return springs (11) are fixedly connected between the T-shaped floor tile (6) and the fixing plate (10).
2. A display screen according to claim 1, characterized in that: A cleaning mechanism is provided in the fixed frame (4), the cleaning mechanism comprising an air storage chamber (14) provided in the top wall of the fixed frame (4), a sliding plate (15) being sealingly and slidably connected in the air storage chamber (14), a force storage spring (16) being fixedly connected between the sliding plate (15) and the inner end wall of the air storage chamber (14), an exhaust pipe (13) being passed through and fixedly connected in the sliding sleeve (2), the exhaust pipe (13) being passed through and slidably connected to the fixed frame (4) and extending into the air storage chamber (14), a plurality of air inlet holes (12) being provided in the side wall of the sliding sleeve (2), a plurality of air injection pipes (17) being passed through and fixedly connected in the fixed frame (4), an electromagnetic valve (18) being provided in the air injection pipe (17), a delay switch (19) being fixedly connected to the inner end wall of the air storage chamber (14), the delay switch (19) being electrically connected to the electromagnetic valve (18) via a wire.
3. A display screen according to claim 2, characterized in that: A plurality of heat dissipation fins (20) are fixedly connected to the side wall of the display screen (5); the exhaust pipe (13) and the heat dissipation fins (20) are penetrated and fixedly connected; and the heat dissipation fins (20) and the exhaust pipe (13) are both made of copper alloy.
4. A display screen according to claim 2, characterized in that: Both the air inlet (12) and the exhaust pipe (13) are provided with a one-way valve.
5. The display screen according to claim 1, characterized in that: A monitoring mechanism is arranged in the fixed frame (4), and the monitoring mechanism comprises a dust discharge hole (21) and a cavity (26) provided in the bottom wall of the fixed frame (4); the inner side wall of the dust discharge hole (21) is rotatably connected to a rotating rod (22) via a bearing; a plurality of fan blades (23) are fixedly connected to the side wall of the rotating rod (22); a conductive rod (24) is fixedly connected to the side wall of one of the fan blades (23); a permanent magnetic plate (25) is arranged in the bottom wall of the fixed frame (4); an electric push rod (27) is fixedly connected to the bottom wall of the cavity (26); the electric push rod (27) and the conductive rod (24) are electrically connected via a wire; a button switch (28) is fixedly connected to the top wall of the cavity (26); an indicator light (29) is fixedly connected to the upper surface of the fixed frame (4); the button switch (28) and the indicator light (29) are electrically connected via a wire.
6. The display screen according to claim 1, characterized in that: A sealing ring is provided at the sliding connection between the T-shaped floor tile (6) and the base (1).