Self-cleaning anti-static flight information display screen

Abstract

The application relates to the technical field of display screens and discloses a self-cleaning anti-static flight information display screen, which comprises a display screen coated with an anti-static coating and a frame, further comprises a cleaning structure detachably mounted on the frame, the cleaning structure comprises a cleaning roller capable of reciprocating along the surface of the display screen, the outer wall of the cleaning roller is provided with a dust suction gap extending in the axial direction, the inside of the cleaning roller is provided with a negative pressure cavity in communication with the dust suction gap, and the negative pressure cavity can form a continuous negative pressure; the cleaning structure further comprises a switching part capable of adjusting the reciprocating rotation of the cleaning roller around the axis as the center, and the cleaning roller has two states of normal wiping and gap cleaning. The cleaning roller is switched back and forth between the two states of normal wiping and gap cleaning, the integrated cleaning of the screen surface and the splicing joint is realized, and the accumulation of impurities, the scratching of the coating and the formation of the splicing joint ash line are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of display screen technology, specifically to a self-cleaning anti-static flight information display screen. Background Technology

[0002] In airports, flight information displays typically employ large-screen systems composed of multiple panels to meet passengers' demands for large, high-definition viewing. However, due to the working principle and structural characteristics of LCD screens, their surfaces are prone to accumulating static electricity during use, attracting dust, fibers, and other fine particles from the air, thus affecting display clarity and the viewing experience. To address this issue, existing technologies generally employ two methods: one is to coat the display surface with an anti-static coating to reduce static electricity buildup; the other is to regularly clean the display surface to keep it clean.

[0003] Regarding dust removal and cleaning, Chinese Patent Publication No. CN118486241B proposes an improved solution. This solution involves setting an intermittently rotating cleaning roller, which continuously changes the contact surface between the roller and the screen during wiping, allowing accumulated impurities to be separated from the screen surface in a timely manner and preventing them from accumulating into clumps. This solution not only removes dust from the display screen surface but also addresses the problem of dust accumulation scratching the coating to some extent.

[0004] However, this solution is primarily designed for flat screens and has limitations for the splicing displays commonly used in airports. Splicing screens are composed of multiple independent screen units, with gaps between them. In actual use, dust easily accumulates deep within these gaps. While the seams parallel to the cleaning roller's movement direction are relatively easy to clean due to the roller's elasticity, the seams perpendicular to the roller's movement direction tend to form noticeable dust lines. This, especially after repeated cleaning, can severely affect display quality, and the accumulated dust lines may even corrode the display, causing localized dead pixels. Existing cleaning solutions, whether using fixed-surface wiping or the intermittent surface-swapping method mentioned above, are ineffective at removing dust accumulated deep within these gaps. Summary of the Invention

[0005] The purpose of this invention is to provide a self-cleaning anti-static flight information display screen to solve the problem that traditional cleaning methods are difficult to effectively remove gray lines from splicing seams, thus achieving integrated cleaning of the screen surface and splicing seams.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning anti-static flight information display screen, comprising a display screen coated with an anti-static coating and a frame, and further comprising a cleaning structure detachably mounted on the frame. The cleaning structure includes a cleaning roller capable of reciprocating along the surface of the display screen. The outer wall of the cleaning roller has an axially extending dust-absorbing slit. The interior of the cleaning roller has a negative pressure chamber communicating with the dust-absorbing slit, and a continuous negative pressure can be formed within the negative pressure chamber. The cleaning structure also includes a switching part that allows the cleaning roller to reciprocate and adjust around an axis, and allows the cleaning roller to have two states: normal wiping and gap cleaning. When the cleaning roller is in the normal wiping state, the rear edge of the dust-absorbing slit contacts the surface of the display screen along the moving direction of the cleaning roller. When the cleaning roller is in the gap cleaning state, the cleaning roller moves to the splicing seam of the display screen, and the two sides of the dust-absorbing slit contact the display screen surfaces on both sides of the splicing seam, so that the dust-absorbing slit and the splicing seam form a negative pressure channel.

[0007] Optionally, it also includes a movable mounting component for mounting the cleaning roller, the movable mounting component including two sets of fasteners that can be mounted on two opposite sidewalls of the frame, and each of the two fasteners is equipped with a reciprocating electric slider, the cleaning roller being detachably mounted between the two electric sliders.

[0008] Optionally, the cleaning roller includes an inner tube and a roller sleeve that are rotatably inserted into each other. The end faces of the two electric sliders are provided with through holes. The two ends of the inner tube are respectively inserted into and fixed in the two through holes. The negative pressure chamber is axially extended through the inner tube. The dust suction slit is opened on the outer wall of the roller sleeve. The outer wall of the inner tube is also provided with a connecting slit that keeps the negative pressure chamber and the dust suction slit connected. A baffle is also provided in the middle of the connecting slit. A negative pressure component that communicates with the negative pressure chamber is also installed on the electric slider.

[0009] Optionally, the negative pressure assembly includes an eccentric groove formed on the end face of the electric slider and a piston box located within the eccentric groove. The outer wall of the piston box is connected to a one-way suction tube, which is inserted into the through hole of the electric slider and communicates with the negative pressure chamber. The piston box can continuously rotate around the axis of the one-way suction tube. A piston block is slidably installed on the inner wall of the piston box, and the piston block divides the interior of the piston box into two cavities. A piston rod is slidably installed through the interior of the piston box, and the piston rod passes through the piston block and is fixedly connected to the through point of the piston block. One-way air outlets are formed on both outer walls of the piston box, and the two one-way air outlets are respectively connected to the two cavities. The center of the inner arc surface of the eccentric groove is eccentrically set with the axis of the one-way suction tube. When the piston box rotates, the two ends of the piston rod will alternately contact and slide with the inner arc surface of the eccentric groove.

[0010] Optionally, it also includes a drive unit for driving the rotation of the one-way inhalation tube. The drive unit includes a power gear coaxially fixed to the outer wall of the one-way inhalation tube and a transmission gear rotatably mounted on the inner wall of the eccentric groove. The power gear and the transmission gear mesh with each other, and the diameter of the transmission gear is larger than the diameter of the power gear. The outer wall of the buckle is also fixed with a rack that meshes with the transmission gear.

[0011] Optionally, it also includes a filter element disposed between the one-way inhalation tube and the inner tube. The filter element includes a filter screen installed at the air inlet end of the one-way inhalation tube and a dust collection cylinder that can be detachably connected to the air inlet end of the one-way inhalation tube. The air inlet of the dust collection cylinder is opposite to and connected to the negative pressure chamber of the inner tube, and the air inlet of the dust collection cylinder is provided with a folded edge.

[0012] Optionally, the filter screen is cone-shaped, with the cone tip facing into the ash storage cylinder.

[0013] Optionally, the switching unit includes a motor drive unit and a sensor controller mounted on the outer wall of the electric slider. The motor drive unit is connected to the cleaning roller via a transmission belt structure, and the sensor controller controls the forward and reverse rotation of the motor drive unit by detecting the position of the splice seam.

[0014] Optionally, the outer wall of the roller sleeve is covered with a flexible layer, and the hardness of the flexible layer is lower than the hardness of the antistatic coating on the surface of the display screen.

[0015] Optionally, the axial length of the cleaning roller is greater than the width of the display screen, and the length of the dust suction slit is greater than or equal to the width of the display screen.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: I. This invention uses a cleaning roller that moves back and forth along the surface of the display screen, combined with a scraping contact at the rear edge of the dust suction seam. This effectively prevents impurities from accumulating and scratching the anti-static coating. At the same time, the narrow gap between the front edge of the dust suction seam and the screen surface generates a high-speed scouring airflow, achieving both a cleaning effect of wiping and suctioning simultaneously, and the dual purpose of loosening stubborn impurities in advance and preventing floating dust from escaping, thus improving cleaning efficiency and quality.

[0017] Second, this invention drives the cleaning roller to rotate and adjust by switching, so that the edges on both sides of the dust suction seam simultaneously contact the screen surfaces on both sides of the splicing seam to form a negative pressure channel, thereby achieving the effect of targeted suction and removal of dust inside the splicing seam, effectively eliminating the problem of dust lines in the splicing seam, and realizing integrated and comprehensive cleaning of the screen surface and the splicing seam.

[0018] Third, this invention drives the piston block to reciprocate through the eccentric fit design of the piston box and the eccentric groove, achieving the effect of synchronously generating continuous pulse negative pressure using the kinetic energy of the moving cleaning roller, thus realizing continuous suction without the need for an additional power source; at the same time, the combination design of the conical filter screen and the detachable dust collection cylinder extends the filter screen clogging cycle and facilitates the centralized cleaning of dust, reducing maintenance frequency and operation difficulty. Moreover, the cleaning structure is integrated into the display screen bezel, solving the safety problem of manual high-altitude operations. Furthermore, the automated cleaning process is far more efficient than manual cleaning, saving time and effort. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the display screen and frame of the present invention; Figure 2 This is a three-dimensional structural diagram of the cleaning structure mounted on the frame of the present invention; Figure 3 This is an enlarged cross-sectional view of the top surface of the negative pressure component of the present invention; Figure 4 This is a front view of the cleaning structure mounted on the frame of the present invention; Figure 5 For the present invention Figure 4 A partial sectional view along the center AA; Figure 6 This is an exploded cross-sectional perspective view of the negative pressure component and filter element of the present invention. Figure 7 For the present invention Figure 4 Half-section view along the middle edge BB; Figure 8 For the present invention Figure 7 Enlarged view at point C; Figure 9 This is a cross-sectional view of the roller sleeve under the condition of gap cleaning according to the present invention; Figure 10 For the present invention Figure 9 Enlarged view at point D; Figure 11 This is a radial sectional view and a partially enlarged view of the roller sleeve of the present invention.

[0020] In the picture: 1. Display screen; 11. Splicing seam; 2. Border; 3. Cleaning roller; 31. Inner tube; 32. Roller sleeve; 33. Negative pressure chamber; 34. Connecting seam; 35. Dust suction seam; 36. Flexible layer; 37. Baffle strip; 4. Movable mounting components; 41. Fasteners; 42. Electric sliders; 5. Negative pressure assembly; 51. Piston box; 52. Piston block; 53. Piston rod; 54. Eccentric groove; 55. One-way suction tube; 56. One-way exhaust port; 6. Drive unit; 61. Power gear; 62. Transmission gear; 63. Rack; 7. Switching unit; 71. Motor drive unit; 72. Sensor controller; 8. Filter element; 81. Filter screen; 82. Ash collection cylinder; 83. Folded-back edge. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0022] Please see Figures 1 to 11 The present invention provides a technical solution: a self-cleaning anti-static flight information display screen, including a display screen 1 coated with an anti-static coating, a frame 2, and a cleaning structure detachably mounted on the frame 2. The cleaning structure includes a cleaning roller 3 that can reciprocate along the surface of the display screen 1. The outer wall of the cleaning roller 3 is provided with a dust-absorbing slit 35 extending axially. The interior of the cleaning roller 3 is provided with a negative pressure cavity 33 communicating with the dust-absorbing slit 35, and a continuous negative pressure can be formed in the negative pressure cavity 33. The cleaning structure also includes a switching part 7 that allows the cleaning roller 3 to reciprocate around the axis, and allows the cleaning roller 3 to have two states: normal wiping and crevic cleaning. When the cleaning roller 3 is in normal wiping state, along the moving direction of the cleaning roller 3, the rear edge of the dust suction slit 35 contacts the surface of the display screen 1; When the cleaning roller 3 is in the gap cleaning state, the cleaning roller 3 moves to the splicing seam 11 of the display screen 1, and the two sides of the dust suction seam 35 contact the display screen 1 surface on both sides of the splicing seam 11, so that the dust suction seam 35 and the splicing seam 11 form a negative pressure channel.

[0023] Currently, airport flight information display screens (screen 1) are generally composed of multiple independent screen units spliced ​​together. For passenger viewing convenience, the overall hanging position is relatively high. Manual cleaning would be inconvenient and pose safety hazards due to the high altitude, and would require numerous and inconvenient tools. Therefore, to clean dust and impurities within the splicing seams 11 between the screen units, a detachable cleaning structure is integrated into the frame 2 of the display screen 1. Figure 1 As shown, the specific cleaning method is as follows: When cleaning of the display screen 1 is required, the cleaning roller 3 is controlled to move along the surface of the display screen 1, and at the same time, the rear edge of the dust suction slit 35 opened on the cleaning roller 3 contacts the surface of the display screen 1, such as... Figure 7 and Figure 8 As shown in the figure, a and b refer to the front and rear edges of the dust suction slit 35, respectively. The specific location is determined according to the moving direction of the cleaning roller 3. For ease of subsequent description, this case takes a as the rear edge and b as the front edge as an example.

[0024] During the movement of the cleaning roller 3, point a first contacts the screen surface of display screen 1 (i.e., this is the normal wiping state). The dust and impurities on the screen surface of display screen 1 are scraped off by scraping. The collected dust and impurities are temporarily stored on the inner wall of the suction slit 35 near the a side. The design of the suction slit 35 can form a space to accommodate dust and impurities, preventing excessive accumulation of impurities between the wiping point (point a) and the screen surface. On the other hand, during the movement of the cleaning roller 3, the internal negative pressure chamber 33 will start to form a continuous negative pressure. Combined with the suction slit 35, an airflow can be formed to flow into the negative pressure chamber 33, thereby sucking the dust and impurities temporarily stored on the inner wall of the suction slit 35 near the a side back into the negative pressure chamber 33. This achieves the effect of wiping and sucking at the same time, so that the accumulated impurities are separated from the screen surface in time, preventing impurities from accumulating into clumps and preventing dust accumulation from scratching the anti-static coating on the surface of display screen 1.

[0025] Similarly, the cleaning roller 3 can also perform the cleaning purpose during the return stroke. The difference is that during the return stroke, the normal wiping state is switched to point b contacting the screen surface of the display screen 1. In this way, the cleaning roller 3 can perform the cleaning function on both the outward and return strokes, thus improving the cleaning efficiency.

[0026] Furthermore, it is worth mentioning that because the opening of the dust extraction slit 35 is relatively small, a very narrow gap will be formed between point b and the screen surface of display screen 1, such as... Figure 8 As shown, when external airflow is drawn into the dust-collecting slit 35 through the gap, the airflow velocity increases due to the small flow cross-section, thus forming a high-speed scouring airflow in the gap at point b. Before scraping at point a, the scouring airflow acts on the floating dust on the surface of the display screen 1, which can prevent the floating dust from escaping. At the same time, the scouring airflow also helps to loosen the more stubborn impurities attached to the screen surface, thereby improving the subsequent scraping and cleaning effect at point a. Moreover, after the scouring airflow enters the dust-collecting slit 35, it will also directly impact the dust and impurities temporarily stored at point a, thereby dispersing the accumulated dust and drawing it into the negative pressure chamber 33 with the airflow, avoiding the accumulation of impurities on the inner wall of the dust-collecting slit 35 and improving the cleaning effect. At the same time, the scouring airflow also plays a role in cleaning the impurities attached to point b, so that point b can be kept clean during the return process.

[0027] As the cleaning roller 3 moves to the splicing seam 11 of the display screen 1, the switching unit 7 controls the cleaning roller 3 to rotate and adjust around its own axis, so that the two sides of the dust suction seam 35 contact the surfaces of the display screen 1 on both sides of the splicing seam 11 (i.e., the edges on both sides a and b are in contact with the screen surface), thereby forming a negative pressure channel between the dust suction seam 35 and the splicing seam 11. Figure 9 and Figure 10 As shown, the negative pressure suction acts directly on the splicing seam 11, thereby sucking out the impurities in the splicing seam 11 to achieve the purpose of eliminating the dust layer line in the splicing seam 11. Then, after the cleaning roller 3 passes over the splicing seam 11, the switching unit 7 controls the cleaning roller 3 to reset and rotate, and switches again to contact the screen surface only at point a (i.e., normal wiping state).

[0028] In this way, the cleaning roller 3 adjusts the wiping state according to the wiping position, thereby achieving effective cleaning of the screen surface and splicing seam 11, and thus preventing dust from accumulating in the splicing seam 11 perpendicular to the wiping direction to form obvious gray lines.

[0029] It is worth noting that the axial length of the cleaning roller 3 is greater than the width of the display screen 1, and the length of the dust suction slit 35 is greater than or equal to the width of the display screen 1. This ensures that the cleaning range can cover the display screen 1. Furthermore, the opening width of the dust suction slit 35 is greater than the width of the splicing seam 11, so that the dust suction slit 35 can completely cover the splicing seam 11. In addition, to improve the smoothness of the cleaning process, the rotation and movement adjustment of the cleaning roller 3 can be carried out simultaneously. This allows the opening width of the dust suction slit 35 to completely cover the splicing seam 11 during the adjustment process, thus allowing for a certain range of rotational error during adjustment. (That is, the range of movement deviation after a and b both come into contact with the screen surface of display 1). Within this error range, the dust suction seam 35 can completely cover the splicing seam 11. That is, the rotation adjustment of the cleaning roller 3 at the splicing seam 11 can be adjusted during its movement, or the cleaning roller 3 can be stopped when it is adjusted at the splicing seam 11, and then moved again after the dust suction of the splicing seam 11 is completed. Both methods are acceptable. The difference between the two is that if the cleaning roller 3 is adjusted during its movement, then the dust suction time for the splicing seam 11 will be shorter. Conversely, if it is stopped at the splicing seam 11, the cleaning time at that point can be controlled and extended to achieve the purpose of focused cleaning.

[0030] In one preferred embodiment, to facilitate the installation of the cleaning roller 3, an installation method for the cleaning roller 3 is provided to facilitate its disassembly and installation, specifically as follows: Figure 2As shown, the installation structure includes a movable mounting component 4 for mounting the cleaning roller 3. The movable mounting component 4 includes two sets of fasteners 41 that can be mounted on two opposite sidewalls of the frame 2, and each of the two fasteners 41 is equipped with an electric slider 42 that can slide back and forth. The cleaning roller 3 is detachably mounted between the two electric sliders 42.

[0031] During installation, the two clips 41 are installed on the upper and lower sides of the frame 2 respectively. Specifically, a clip-on method can be used, such as pre-cutting slots on the outer wall of the frame 2 and inserting the clips 41 into the slots. Figure 2 As shown, it can also be installed by bolts or other means for easy disassembly. The preferred installation position is the long side of the frame 2, which can shorten the axial length of the cleaning roller 3 and avoid its own deformation due to excessive length, which would affect the cleaning effect. After installing the buckle 41, the cleaning roller 3 is installed between the two electric sliders 42. The movement of the electric sliders 42 will drive the cleaning roller 3 to move along the surface of the display screen 1 to achieve the cleaning process.

[0032] Moreover, since the cleaning roller 3 moves through the buckle 41 and the electric slider 42, the path and force of each cleaning are highly consistent, which not only ensures a long-term and stable cleaning effect, but also avoids physical damage to the antistatic coating or display screen 1 caused by improper force during manual cleaning.

[0033] In order to facilitate the installation and disassembly of the cleaning roller 3, and also to ensure that the negative pressure chamber 33 inside the cleaning roller 3 can form a continuous negative pressure, a specific structure of the cleaning roller 3 is provided in a preferred embodiment, such as... Figure 5 and Figure 7 As shown, the cleaning roller 3 includes an inner tube 31 and a roller sleeve 32 that are rotatably inserted into each other. The end faces of the two electric sliders 42 are provided with through holes. The two ends of the inner tube 31 are respectively inserted into and fixed in the two through holes. The negative pressure chamber 33 is axially opened through the inner tube 31. The dust suction slit 35 is opened on the outer wall of the roller sleeve 32. The outer wall of the inner tube 31 is also provided with a connecting slit 34 that keeps the negative pressure chamber 33 and the dust suction slit 35 connected. A baffle 37 is also provided in the middle of the connecting slit 34. The electric slider 42 is also equipped with a negative pressure component 5 that communicates with the negative pressure chamber 33.

[0034] First, during installation, insert and fix both ends of the inner tube 31 into the through holes of the two electric sliders 42 respectively, so that the negative pressure chamber 33 is connected to the negative pressure component 5, in preparation for the subsequent generation of negative pressure in the negative pressure chamber 33 for air intake.

[0035] Secondly, when the state of the suction slit 35 needs to be switched, it can be adjusted by rotating the roller sleeve 32 driven by the switching part 7. The switching part 7 includes a motor drive unit 71 and a sensor controller 72 mounted on the outer wall of the electric slider 42. The motor drive unit 71 is connected to the cleaning roller 3 via a transmission belt structure. (See attached image) Figure 4 and Figure 5 The transmission belt structure includes a transmission wheel fixed coaxially with the roller sleeve 32 and a transmission wheel mounted on the output shaft of the motor drive unit 71. The two transmission wheels are driven by a transmission belt. The transmission belt structure is preferably a sprocket and chain drive to prevent transmission slippage.

[0036] Meanwhile, as the electric slider 42 drives the cleaning roller 3 to move, the sensor controller 72 controls the forward and reverse rotation of the motor drive unit 71 by detecting the position of the splice seam 11, so as to achieve the purpose of switching between the roller sleeve 32 and the dust suction seam 35 on it in the normal wiping state and the gap cleaning state. Moreover, in the return state, the motor drive unit 71 can drive the roller sleeve 32 to rotate to complete the switch from wiping a to wiping b, and complete the cleaning in the return process. The state switching in the return process is the same as that in the outgoing process, so it will not be described again.

[0037] In order to ensure that both points a and b can contact the screen surface, a flexible layer 36 is wrapped around the outer wall of the roller sleeve 32. The hardness of the flexible layer 36 is lower than that of the anti-static coating on the surface of the display screen 1. The flexible layer 36 can be made of fine elastic cotton. In this way, under normal wiping conditions, the compression deformation of the flexible layer 36 at point a can improve the cleaning effect. Moreover, after switching to the gap cleaning state, the flexible layer 36 can also make the edges shown at points a and b contact the screen surface at the same time to ensure the formation of the negative pressure channel.

[0038] The sensor controller 72 can use a distance sensor, such as detecting the moving distance of the electric slider 42 to detect whether it has moved to the splice seam 11, or it can use a laser sensor, such as detecting the return laser when the laser shines on the splice seam to determine whether it has moved to the splice seam 11. The specific structure and method can be selected according to the actual situation, or other existing detection sensors can be used.

[0039] It is worth mentioning that, see Figure 11 The suction slit 35 and the negative pressure chamber 33 are connected by a connecting slit 34. The design of the baffle 37 inside the connecting slit 34 can block the connecting surface of the suction slit 35 and the connecting slit 34 when the roller sleeve 32 switches to the gap cleaning state, thereby reducing the connecting area and increasing the flow rate of the negative pressure airflow, thus improving the adsorption effect. In this way, the cleaning effect can be further improved by increasing the airflow rate in the gap cleaning state.

[0040] It is worth noting that the baffle 37 is designed to be located in the middle of the connecting seam 34, ensuring that it does not obstruct airflow during normal wiping, and only obstructs airflow when rotating to the seam cleaning state.

[0041] Based on the above, in order to synchronize the cleaning process with the formation of negative pressure in the negative pressure chamber 33, an implementation of the negative pressure component 5 is provided, which can be seen in the following details. Figure 3 and Figure 5 The negative pressure assembly 5 includes an eccentric groove 54 formed on the end face of the electric slider 42 and a piston box 51 located within the eccentric groove 54. A one-way suction tube 55 is connected to the middle outer wall of the piston box 51. The one-way suction tube 55 is inserted into the through hole of the electric slider 42 and communicates with the negative pressure chamber 33. The piston box 51 can continuously rotate around the axis of the one-way suction tube 55. A sealing ring is installed between the one-way suction tube 55 and the through hole to prevent air leakage. A piston block 52 is slidably mounted on the inner wall of the piston box 51, and the piston block 52 pushes the piston... The piston box 51 is divided into two cavities. A piston rod 53 is slidably installed inside the piston box 51. The piston rod 53 passes through the piston block 52 and is fixedly connected to the through point of the piston block 52. One-way air outlets 56 are opened on both outer walls of the piston box 51, and the two one-way air outlets 56 are respectively connected to the two cavities. The center of the inner arc surface of the eccentric groove 54 is eccentrically set with the axis of the one-way air intake tube 55. When the piston box 51 rotates, the two ends of the piston rod 53 will alternately contact and slide with the inner arc surface of the eccentric groove 54.

[0042] like Figure 5 As shown, a one-way air valve is installed in both the one-way suction tube 55 and the one-way air outlet 56. The structure of the one-way air valve is adopted, but the specific structure is not shown in the figure.

[0043] The negative pressure assembly 5 also includes a drive unit 6 for driving the rotation of the one-way inhalation tube 55. The drive unit 6 includes a power gear 61 coaxially fixed to the outer wall of the one-way inhalation tube 55 and a transmission gear 62 rotatably mounted on the inner wall of the eccentric groove 54. The power gear 61 and the transmission gear 62 mesh with each other, and the diameter of the transmission gear 62 is larger than the diameter of the power gear 61. The outer wall of the buckle 41 is also fixed with a rack 63 that meshes with the transmission gear 62.

[0044] During the cleaning process, when the electric slider 42 moves the cleaning roller 3, the transmission gear 62 on it will move along the rack 63, and at the same time drive the power gear 61 to rotate, thereby driving the one-way suction tube 55 and the piston box 51 to rotate together. Since the diameter of the transmission gear 62 is larger than the diameter of the power gear 61, the transmission ratio of the power gear 61 can be increased, thereby increasing the rotational speed of the piston box 51, preparing for the continuous formation of negative pressure.

[0045] See Figure 3 When the piston box 51 rotates, the two ends of the piston rod 53 alternately contact the inner arc surface of the eccentric groove 54. Because the inner arc surface of the eccentric groove 54 is eccentrically designed with respect to the axis of the one-way suction tube 55, when one end of the piston rod 53 contacts the inner arc surface of the eccentric groove 54, as the piston box 51 rotates, the piston rod 53 will drive the piston block 52 to slide within the piston box 51 until it slides to… Figure 3 As shown in the diagram, as the piston box 51 continues to rotate, the other end of the piston rod 53 will contact the inner arc surface of the eccentric groove 54. Thus, the continuous rotation of the piston box 51 can drive the piston block 52 to slide back and forth in the piston box 51 through the piston rod 53. Combined with the one-way suction of the one-way suction tube 55 and the one-way exhaust of the one-way exhaust port 56, a suction effect is formed. The cavities on both sides of the piston block 52 alternately draw air from the negative pressure chamber 33 through the one-way suction tube 55, thereby achieving the purpose of creating a negative pressure state inside it.

[0046] To reduce wear between the piston rod 53 and the inner arc surface of the eccentric groove 54, rollers can be installed at both ends of the piston rod 53 to convert sliding friction into rolling friction, thereby reducing wear. See details [link to documentation]. Figure 6 .

[0047] It is worth mentioning that the length of the piston rod 53 is less than the width of the eccentric groove 54 passing through the center of the one-way suction tube 55, that is... Figure 3 The length shown in the middle L is designed to prevent the piston rod 53 from jamming when the piston box 51 rotates to the vertical position.

[0048] Furthermore, the thickness of the piston block 52 is greater than the inner diameter of the one-way suction tube 55. This ensures that the air pressure changes in the spaces on both sides of the piston block 52 do not affect each other. During the suction process, there is a delay when the negative pressure cavity of the piston block 52 connects with the one-way suction tube 55 (i.e., before the piston block 52 is exposed). This creates a pressure release effect when the negative pressure cavity connects with the one-way suction tube 55, resulting in a transiently enhanced suction effect in the negative pressure cavity 33. This leads to short, rapid airflows in the connecting seam 34 and the dust suction seam 35. Through the alternating action of the two cavities on both sides of the piston block 52, a continuous pulsed suction airflow can be formed in the connecting seam 34 and the dust suction seam 35. The pulsed suction method can further enhance the impact of the airflow, which can further remove stubborn dust adhering to the screen surface, thereby improving the cleaning effect of airflow and scraping.

[0049] This integrated design of the negative pressure component 5 with the cleaning mechanism not only reduces the need for connection to external equipment (such as the need for external connection if negative pressure is generated by air pump), but also reduces noise generation and minimizes the impact on surrounding passengers.

[0050] Furthermore, in order to separate and filter the dust drawn into the negative pressure chamber 33, a filter element 8 is provided between the one-way suction tube 55 and the inner tube 31, such as... Figure 5 and Figure 6 As shown, the filter element 8 includes a filter screen 81 installed at the air inlet end of the one-way air inlet tube 55 and a dust collection cylinder 82 that can be detachably connected to the air inlet end of the one-way air inlet tube 55. The air inlet of the dust collection cylinder 82 is opposite to and connected to the negative pressure chamber 33 of the inner tube 31. The air inlet of the dust collection cylinder 82 is provided with a folded edge 83.

[0051] Furthermore, the filter screen 81 is cone-shaped, with the cone tip facing inwards towards the ash storage cylinder 82.

[0052] The design of the conical filter screen 81 allows the filtered impurities to roll along the conical surface to the edge area, thus extending the clogging time of the filter screen 81 and reducing the cleaning frequency of the filter screen 81. Furthermore, the design of the dust collection cylinder 82 and the folded edge 83 ensures that when the filtered impurities roll to the edge area of ​​the filter screen 81, they will fall into the folded edge 83 under the action of gravity, preventing them from falling back into the negative pressure chamber 33, thus playing a role in centralized collection. This is mainly for the filter element 8 located above the cleaning roller 3, while the dust particles on the filter element 8 located below the cleaning roller 3 will be concentrated in the edge area of ​​the filter screen 81 under the action of gravity.

[0053] During cleaning, after removing the electric slider 42 from the through hole of the one-way suction tube 55, the ash collection cylinder 82 can be removed for cleaning. The ash collection cylinder 82 and the one-way suction tube 55 can be connected by threads, and a sealing ring is added at the connection to ensure the sealing degree after the two are connected.

[0054] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning antistatic flight information display screen, comprising a display screen (1) coated with an antistatic coating and a frame (2), characterized in that, It also includes a cleaning structure that can be detachably installed on the frame (2). The cleaning structure includes a cleaning roller (3) that can reciprocate along the surface of the display screen (1). The outer wall of the cleaning roller (3) is provided with a dust suction slit (35) extending in the axial direction. The interior of the cleaning roller (3) is provided with a negative pressure chamber (33) that communicates with the dust suction slit (35), and a continuous negative pressure can be formed in the negative pressure chamber (33). The cleaning structure also includes a switching part (7) that allows the cleaning roller (3) to reciprocate around the axis, and allows the cleaning roller (3) to have two states: normal wiping and crevice cleaning. When the cleaning roller (3) is in normal wiping state, along the moving direction of the cleaning roller (3), the rear edge of the dust suction seam (35) contacts the surface of the display screen (1); When the cleaning roller (3) is in the gap cleaning state, the cleaning roller (3) moves to the splicing seam (11) of the display screen (1), and the two sides of the dust suction seam (35) contact the display screen (1) surfaces on both sides of the splicing seam (11), so that the dust suction seam (35) and the splicing seam (11) form a negative pressure channel.

2. The self-cleaning anti-static flight information display screen according to claim 1, characterized in that, It also includes a movable mounting part (4) for mounting the cleaning roller (3), the movable mounting part (4) including two sets of fasteners (41) that can be mounted on two opposite sidewalls of the frame (2), and each of the two fasteners (41) is equipped with an electric slider (42) that can slide back and forth, and the cleaning roller (3) is detachably mounted between the two electric sliders (42).

3. The self-cleaning anti-static flight information display screen according to claim 2, characterized in that: The cleaning roller (3) includes an inner tube (31) and a roller sleeve (32) that are rotatably inserted into each other. The end faces of the two electric sliders (42) are provided with through holes. The two ends of the inner tube (31) are respectively inserted into and fixed in the two through holes. The negative pressure chamber (33) is axially opened in the inner tube (31). The dust suction slit (35) is opened on the outer wall of the roller sleeve (32). The outer wall of the inner tube (31) is also provided with a connecting slit (34) that keeps the negative pressure chamber (33) and the dust suction slit (35) connected. A baffle (37) is also provided in the middle of the connecting slit (34). The electric slider (42) is also equipped with a negative pressure component (5) that communicates with the negative pressure chamber (33).

4. The self-cleaning anti-static flight information display screen according to claim 3, characterized in that: The negative pressure assembly (5) includes an eccentric groove (54) formed on the end face of the electric slider (42) and a piston box (51) located in the eccentric groove (54). The middle outer wall of the piston box (51) is connected to a one-way suction tube (55). The one-way suction tube (55) is inserted into the through hole of the electric slider (42) and communicates with the negative pressure chamber (33). The piston box (51) can rotate continuously around the axis of the one-way suction tube (55). A piston block (52) is slidably installed on the inner wall of the piston box (51), and the piston block (52) divides the interior of the piston box (51) into two cavities. A piston rod (53) is slidably installed inside the piston box (51). The piston rod (53) passes through the piston block (52) and is fixedly connected to the through part of the piston block (52). One-way air outlets (56) are opened on both outer walls of the piston box (51), and the two one-way air outlets (56) are respectively connected to two cavities. The center of the inner arc surface of the eccentric groove (54) is eccentrically set with the axis of the one-way suction tube (55). When the piston box (51) rotates, the two ends of the piston rod (53) will alternately contact and slide with the inner arc surface of the eccentric groove (54).

5. The self-cleaning anti-static flight information display screen according to claim 4, characterized in that: It also includes a drive unit (6) for driving the rotation of the one-way inhalation cannula (55). The drive unit (6) includes a power gear (61) coaxially fixed to the outer wall of the one-way inhalation cannula (55) and a transmission gear (62) rotatably mounted on the inner wall of the eccentric groove (54). The power gear (61) and the transmission gear (62) mesh with each other, and the diameter of the transmission gear (62) is larger than the diameter of the power gear (61). The outer wall of the buckle (41) is also fixed with a rack (63) that meshes with the transmission gear (62).

6. The self-cleaning anti-static flight information display screen according to claim 4, characterized in that: It also includes a filter element (8) disposed between the one-way inhalation tube (55) and the inner tube (31). The filter element (8) includes a filter screen (81) installed at the air inlet of the one-way inhalation tube (55) and a dust collection cylinder (82) that can be detachably connected to the air inlet of the one-way inhalation tube (55). The air inlet of the dust collection cylinder (82) is opposite to and connected to the negative pressure chamber (33) of the inner tube (31). The air inlet of the dust collection cylinder (82) is provided with a folded edge (83).

7. The self-cleaning anti-static flight information display screen according to claim 6, characterized in that: The filter screen (81) is cone-shaped with the tip of the cone facing into the ash storage cylinder (82).

8. The self-cleaning anti-static flight information display screen according to any one of claims 1-7, characterized in that: The switching unit (7) includes a motor drive unit (71) and a sensor controller (72) installed on the outer wall of the electric slider (42). The motor drive unit (71) is connected to the cleaning roller (3) by a transmission belt structure. The sensor controller (72) controls the forward and reverse rotation of the motor drive unit (71) by detecting the position of the splice seam (11).

9. The self-cleaning anti-static flight information display screen according to any one of claims 3-6, characterized in that: The outer wall of the roller sleeve (32) is covered with a flexible layer (36), and the hardness of the flexible layer (36) is lower than the hardness of the antistatic coating on the surface of the display screen (1).

10. The self-cleaning anti-static flight information display screen according to any one of claims 1-7, characterized in that: The axial length of the cleaning roller (3) is greater than the width of the display screen (1), and the length of the dust suction slit (35) is greater than or equal to the width of the display screen (1).

Images