Drive mechanism and corresponding lift electronic screen

Abstract

The application provides a driving mechanism and a corresponding lifting electronic screen. The lifting electronic screen comprises an electronic screen body, a shell, a driving mechanism, a cleaning mechanism and a liquid supply mechanism. The electronic screen body is vertically and slidably connected with the shell. The driving mechanism is installed in the shell. The cleaning mechanism is installed on the left side of the driving mechanism. The liquid supply mechanism is fixedly installed on the cleaning mechanism. The driving mechanism is in transmission connection with the electronic screen body. The application saves the use amount of cleaning liquid without reducing other functions of the lifting electronic screen body, and provides a good storage environment for the electronic screen body.

Description

[0001] This application is a divisional application. The original application has the application number "202110866689.6" and the application date is "July 29, 2021". The invention title is "Lifting Electronic Screen". Technical Field

[0002] This invention relates to the production of electronic screen bodies, specifically a driving mechanism and a corresponding lifting electronic screen. Background Technology

[0003] Electronic screens, including LED screens and OLED screens, are both composed of several combinable display units, along with a suitable controller (main control board or control system). Therefore, various specifications of display units, combined with controllers using different control technologies, can form many types of electronic screens to meet the needs of different environments and display requirements.

[0004] Conventional electronic screen cleaning methods often involve spraying cleaning fluid onto a cleaning unit and then sliding the screen from one end to the other for cleaning. However, to ensure sufficient cleaning fluid for the entire cleaning process, residual cleaning fluid inevitably remains on the first end of the screen being cleaned, and some may even drip into the casing, resulting in waste. Furthermore, if cleaning is performed while the screen is being removed from the sealed casing, it's equally difficult to prevent fluid dripping into the casing. Additionally, stubborn stains become increasingly difficult to remove as the screen remains outside the casing, increasing the likelihood of incomplete cleaning due to the sealed nature of the casing. This makes it difficult for residual cleaning fluid to drain from the casing, thereby increasing the humidity inside the casing and storing the electronic screen in a high-humidity environment, which further reduces the lifespan of the electronic screen. On the other hand, reducing the amount of cleaning fluid sprayed to prevent residual cleaning fluid on the screen surface will result in a lack of cleaning fluid at the end of the cleaning process, leading to poor cleaning effect and incomplete cleaning. It is difficult to achieve a balance between the two.

[0005] Based on this, the present invention designs a driving mechanism and a corresponding lifting electronic screen to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a driving mechanism that is connected to both the electronic screen body and the cleaning mechanism, for driving the electronic screen body to move at a constant speed on the housing, and also driving the cleaning mechanism to move intermittently. The driving mechanism includes a first transmission mechanism and a second transmission mechanism.

[0007] The first transmission mechanism includes a first lead screw, a third gear fixedly connected to the lower end of the first lead screw, a second slider threadedly connected to the first lead screw, the second slider being slidably connected to the housing, a second gear vertically slidably connected to the upper end of the first lead screw, the second gear being rotatably mounted on the top surface of the second slider, the second slider being connected to the electronic screen body, and the drive cleaning mechanism being rotatably connected to the upper end of the first lead screw.

[0008] The second transmission mechanism is located below the third gear. The second transmission mechanism includes a second lead screw, and a wheel is threadedly connected to the top end of the second lead screw. The wheel includes a turntable, and a slide rail is provided on the turntable. The third gear is slidably connected to the slide rail. A fourth gear is fixedly connected to the upper end of the turntable, and the fourth gear meshes with the third gear. A motor is drivenly connected to the lower end of the second lead screw, and the motor is fixedly connected to the housing.

[0009] A first rotating shaft is installed inside the housing, and a plurality of equally spaced gear teeth are vertically mounted on the first rotating shaft. The gear teeth are located below the second gear and mesh with the second gear.

[0010] The maximum static friction force of the threaded connection between the first lead screw and the second slider is much smaller than the maximum static friction force of the threaded connection between the second lead screw and the wheel, so that when the first transmission mechanism and the second transmission mechanism are in a free state, the second friction force will preferentially overcome the maximum static friction force of the threaded connection between the first lead screw and the second slider, wherein the second friction force is the friction force generated between the first lead screw and the second slider.

[0011] In this invention, during operation, the motor drives the second lead screw to rotate, and the second lead screw drives the wheel to rotate or rotate relative to the wheel;

[0012] When the second lead screw drives the wheel to rotate, the second slider drives the electronic screen body to slide downwards, and the cleaning mechanism will not be displaced.

[0013] When the second gear, which slides downward, meshes with the gear teeth, the second lead screw rotates relative to the wheel, and the second slider and the second gear move downward accordingly, thereby driving the electronic screen body and the cleaning mechanism to move downward simultaneously. During the descent, the cleaning mechanism cleans the screen surface of the electronic screen body.

[0014] In this invention, a second guide rail is fixedly installed on the inner wall of the right side of the housing, and the second slider is vertically slidably connected to the second guide rail. A first guide rail is fixedly installed on the inner wall of the left side of the housing, and a first slider is slidably connected inside the first guide rail. The first slider and the second slider are respectively fixedly connected to the bottom of the left and right side walls of the electronic screen body. The first rotating shaft is vertically installed on the second guide rail.

[0015] In this invention, the gear teeth are elastic telescopic components that can elastically contract in the vertical direction.

[0016] In this invention, the track grooves of the first guide rail, the second guide rail, and the third guide rail are square.

[0017] In this invention, the upper end of the housing is detachable.

[0018] The present invention also includes a lifting electronic screen, which includes the above-mentioned driving mechanism, as well as a cleaning mechanism and a liquid supply mechanism;

[0019] The cleaning mechanism includes a fixed block, and a second connecting rod is fixedly connected to the side wall of the fixed block. The second connecting rod is rotatably connected to the upper end of the first lead screw. A wiping mechanism is horizontally installed through the fixed block. The wiping mechanism includes a second rotating shaft, which is movably installed through and on the fixed block. A plurality of sponge blocks are fixedly connected to the outer wall of the second rotating shaft in an equidistant manner.

[0020] The driving mechanism is connected to the sponge block and can drive the cleaning surface of the sponge block toward the liquid supply mechanism, or drive the cleaning surface of the sponge block toward and in close contact with the screen surface of the electronic screen body.

[0021] The second rotating shaft has a third slider horizontally mounted on its left end, and a third guide rail and a rack are vertically mounted on the inner wall of the left side of the housing. The third slider is slidably connected to the third guide rail. The sponge block is located between the third slider and the fixed block.

[0022] A third connecting rod is fixedly connected to the side wall of the third slider, and a fourth connecting rod is rotatably connected to the second rotating shaft. A fifth gear is rotatably connected to the front end of the third connecting rod. The fifth gear meshes with a rack. A connecting rod is rotatably mounted on the end face of the fifth gear. The other end of the connecting rod is rotatably connected to the fourth connecting rod.

[0023] In addition, a second guide rail is fixedly installed on the inner wall of the right side of the housing, and a first rotating shaft is vertically installed on the second guide rail. The first rotating shaft and the second guide rail are rotatably connected by a torsion spring, and the rotation angle is fixed. A first gear is provided on the side wall of the first rotating shaft, and the first gear is a part of the arc surface of a complete gear segment. A telescopic rod is fixedly connected to the right end of the second rotating shaft, and a first bevel gear is fixedly connected to the right end of the telescopic rod. A first connecting rod is fixedly connected to the fixed block, and a second bevel gear is rotatably connected to the first connecting rod. The second bevel gear meshes with the first bevel gear and the first gear respectively.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This invention drives a cleaning mechanism to move intermittently relative to the electronic screen body. During this relative movement, cleaning fluid is sprayed; when the mechanism is stationary, the screen body is cleaned. This ensures that a small amount of cleaning fluid is sprayed to clean a portion of the screen surface, precisely covering the screen surface without leaving any residue. Furthermore, this process does not affect the screen body's retraction process. During retraction, the screen body maintains a uniform downward linear motion relative to the housing. This saves on cleaning fluid usage without compromising other functions of the screen body and provides a suitable storage environment for the screen body.

[0026] 2. This invention utilizes two interconnected lead screw drives for transmission. When the nut component in one lead screw drive is fixed, the other lead screw drive moves. This ensures seamless coordination between the two drives, resulting in uniform movement of the electronic screen body and intermittent movement of the cleaning mechanism. Of the two drives, the upper drive only controls the movement of the electronic screen body, while the lower drive controls both the electronic screen body and the cleaning mechanism. When the transmission between the two drives is seamless, the electronic screen body moves at a uniform speed, while the cleaning mechanism moves intermittently with the distance traveled by each drive in a single cycle. Furthermore, the displacement of the cleaning mechanism relative to the electronic screen body is fixed each time it comes to rest. This ensures that, unlike traditional drives where the electronic screen body moves at a uniform speed and the cleaning mechanism moves intermittently, the movements of the electronic screen body and the cleaning mechanism are typically controlled independently. The previous method of linking via electronic components introduces motion errors, causing misalignment between the electronic screen body and the cleaning mechanism relative to the predetermined displacement. Long-term use amplifies these errors, leading to significant misalignment in the coordinated movement between the electronic screen body and the cleaning mechanism. This prevents the cleaning mechanism from completely cleaning the electronic screen body. For example, if the cleaning mechanism's displacement is relatively small compared to the predetermined value, after repeated use, it may be positioned below its initial position at the start of cleaning, thus preventing the upper part of the electronic screen body from being cleaned. In contrast, this invention uses a mechanical structure to coordinate the movement between the electronic screen body and the cleaning mechanism in the mechanical transmission stage. This ensures that the electronic screen body and the cleaning mechanism do not misalign, thereby guaranteeing that the entire plane of the electronic screen body can be cleaned, improving the cleaning effect of the equipment.

[0027] 3. By utilizing the elastic contraction property of the gear teeth, even when the tooth gap of the gear teeth is not vertically aligned with the second gear, the second gear will not damage the gear teeth as it continues to move downwards, thus preventing equipment damage and improving equipment stability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2This is a schematic cross-sectional view of the overall structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the overall structure of the present invention after the shell has been removed;

[0031] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0032] Figure 5 This is a schematic diagram of the drive mechanism;

[0033] Figure 6 This is a schematic diagram of the cleaning mechanism;

[0034] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0035] Figure 8 for Figure 6 Enlarged view of point C in the middle;

[0036] Figure 9 A front view schematic diagram of the liquid supply mechanism structure;

[0037] Figure 10 This is a rear view schematic diagram of the liquid supply mechanism.

[0038] The attached diagram lists the components represented by each number as follows:

[0039] Electronic screen body 1, first slider 1-1, housing 2, first guide rail 2-1, drive mechanism 3, second guide rail 3-1, first rotating shaft 3-2, first gear 3-2-1, gear teeth 3-2-2, first transmission mechanism 3-3, first lead screw 3-3-1, second gear 3-3-2, second slider 3-3-3, third gear 3-3-4, second transmission mechanism 3-4, second lead screw 3-4-1, wheel 3-4-2, fourth gear 3-4-2-1, turntable 3-4-2-2, slide rail 3-4-2-3, motor 3-5, cleaning mechanism 4, rack 4-1, third guide rail 4-2, wiping mechanism 4-3, second rotating shaft 4 -3-1, Sponge block 4-3-2, Telescopic rod 4-3-3, First bevel gear 4-3-4, Fixing block 4-4, First connecting rod 4-4-1, Second bevel gear 4-4-2, Connecting ring 4-4-3, Second connecting rod 4-4-4, Third slider 4-4-5, Third connecting rod 4-4-6, Fifth gear 4-4-7, Connecting rod 4-4-8, Fourth connecting rod 4-4-9, Liquid supply mechanism 5, Spraying mechanism 5-1, Fixing rod 5-1-1, Fifth connecting rod 5-1-2, Nozzle 5-1-3, Liquid outlet cylinder 5-2, Pressure plate 5-3, Sixth connecting rod 5-3-1, Liquid outlet pipe 5-2-1, Liquid inlet pipe 5-2-2. Detailed Implementation

[0040] Please see Figure 1-10 The present invention provides a technical solution: a lifting electronic screen, comprising an electronic screen body 1, a housing 2, a driving mechanism 3, a cleaning mechanism 4, and a liquid supply mechanism 5; the electronic screen body 1 is vertically slidably connected to the housing 2, the driving mechanism 3 is installed inside the housing 2, the cleaning mechanism 4 is installed on the left side of the driving mechanism 3, the liquid supply mechanism 5 is fixedly installed on the cleaning mechanism 4, and the driving mechanism 3 and the electronic screen body 1 are connected by transmission; the driving mechanism 3 is used to drive the electronic screen body 1 to move at a uniform speed, and also drives the cleaning mechanism 4 to move intermittently.

[0041] During operation, as the electronic screen body 1 is retracted into the housing 2, the drive mechanism 3 drives the electronic screen body 1 to move downwards at a constant speed relative to the housing 2. After each downward movement of the electronic screen body 1, the cleaning mechanism 4 and the liquid supply mechanism 5 remain stationary relative to the housing 2. This distance is also the distance that the electronic screen body 1 moves downwards relative to the cleaning mechanism 4. The liquid supply mechanism 5 sprays cleaning liquid onto the cleaning part of the cleaning mechanism 4. The cleaning mechanism 4 moves downwards synchronously with the electronic screen body 1 at a constant speed and cleans the surface of the part of the electronic screen body 1 that has moved downwards relative to the cleaning mechanism 4. Then, the cleaning mechanism 4 becomes stationary relative to the housing 2 again, and the above process is repeated until the screen surface of the electronic screen body 1 is completely cleaned by the cleaning mechanism 4.

[0042] Finally, during the process of the electronic screen body 1 being raised from the housing 2, the drive mechanism 3 first drives the cleaning mechanism 4 to move the electronic screen body 1 upward at a constant speed, while the cleaning mechanism 4 cleans the electronic screen body 1. Then, the electronic screen body 1 moves upward at a constant speed on its own, but during this process, the liquid supply mechanism 5 no longer sprays cleaning liquid onto the cleaning part of the cleaning mechanism 4. Then, this process is repeated until the electronic screen body 1 is completely raised from the housing 2. It should be noted that during the raising process, the liquid supply mechanism 5 does not spray cleaning liquid onto the cleaning part of the cleaning mechanism 4.

[0043] Conventional methods for cleaning the electronic screen body 1 typically involve spraying cleaning fluid onto the cleaning section, which then slides the screen body 1 from one end to the other for cleaning. However, to meet the required cleaning fluid volume throughout the entire cleaning process, residual cleaning fluid inevitably accumulates on the screen surface at the first end cleaned. Some cleaning fluid may even drip into the housing 2, resulting in waste. Furthermore, if cleaning is performed while the screen body 1 is being removed from the sealed housing 2, it's equally difficult to prevent cleaning fluid from dripping into the housing 2. Additionally, after the screen body 1 has been outside the housing 2, stubborn stains become increasingly difficult to remove as they remain attached. Cleaning during the removal process further complicates matters, increasing the difficulty of cleaning stains and making incomplete cleaning highly likely due to the sealed nature of the housing 2. This makes it difficult for residual cleaning fluid to drain from the housing 2, thereby increasing the humidity inside the housing 2 and storing the electronic screen body 1 in a high-humidity environment, which further reduces the service life of the electronic screen body 1. On the other hand, reducing the amount of cleaning fluid sprayed in order to prevent residual cleaning fluid on the screen surface will result in a lack of cleaning fluid at the end of the cleaning process, leading to poor cleaning effect and incomplete cleaning. It is difficult to achieve a balance between the two.

[0044] This invention drives the cleaning mechanism 4 to move intermittently relative to the electronic screen body 1. During this relative movement, cleaning fluid is sprayed; when the mechanism is stationary, the electronic screen body 1 is cleaned. This ensures that a small amount of cleaning fluid is sprayed to clean a portion of the screen surface, guaranteeing that each spray is sufficient for cleaning without leaving any residue. Furthermore, this process does not affect the retraction of the electronic screen body 1. During retraction, the electronic screen body 1 maintains a constant downward linear motion relative to the housing 2. This saves on cleaning fluid usage without compromising other functions of the lifting electronic screen body, and also provides a suitable storage environment for the electronic screen body 1.

[0045] As a further embodiment of the present invention, the driving mechanism 3 includes a first transmission mechanism 3-3 and a second transmission mechanism 3-4. The first transmission mechanism 601 includes a first lead screw 3-3-1, a third gear 3-3-4 fixedly connected to the lower end of the first lead screw 3-3-1, a second slider 3-3-3 threadedly connected to the first lead screw 3-3-1, and a second gear 3-3-2 vertically slidably connected to the upper end of the first lead screw 3-3-1. The second gear 3-3-2 is rotatably mounted on the top surface of the second slider 3-3-3.

[0046] A second transmission mechanism 3-4 is provided below the third gear 3-3-4. The second transmission mechanism 3-4 includes a second lead screw 3-4-1. The top end of the second lead screw 3-4-1 is threadedly connected to a wheel 3-4-2. The wheel 3-4-2 includes a turntable 3-4-2-2. A slide rail 3-4-2-3 is provided on the turntable 3-4-2-2. The third gear 3-3-4 is slidably connected to the slide rail 3-4-2-3. A fourth gear 3-4-2-1 is fixedly connected to the upper end of the turntable 3-4-2-2. The fourth gear 3-4-2-1 meshes with the third gear 3-3-4. A motor 3-5 is drivenly connected to the lower end of the second lead screw 3-4-1. The motor 3-5 is fixedly connected to the housing 2.

[0047] A second guide rail 3-1 is fixedly installed on the inner wall of the right side of the housing 2. The second slider 3-3-3 is vertically slidably connected to the second guide rail 3-1. A first guide rail 2-1 is fixedly installed on the inner wall of the left side of the housing 2. A first slider 1-1 is slidably connected inside the first guide rail 2-1. The first slider 1-1 and the second slider 3-3-3 are respectively fixedly connected to the bottom of the left and right side walls of the electronic screen body 1. A first rotating shaft 3-2 is vertically installed on the second guide rail 3-1. A plurality of equally spaced gear teeth 3-2-2 are vertically installed on the first rotating shaft 3-2. The gear teeth 3-2-2 are located below the second gear 3-3-2 and can mesh with the gear teeth 3-3-2.

[0048] The maximum static friction force of the threaded connection between the first lead screw 3-3-1 and the second slider 3-3-3 is much smaller than the maximum static friction force of the threaded connection between the second lead screw 3-4-1 and the wheel 3-4-2; the transmission ratio from the motor 3-5 to the second slider 3-3-3 is the same as the transmission ratio from the motor 3-5 to the wheel 3-4-2.

[0049] During operation, motor 3-5 drives the second lead screw 3-4-1 to rotate. At this time, the second lead screw 3-4-1 drives the wheel 3-4-2 to rotate or rotates relative to the wheel 3-4-2.

[0050] If the second lead screw 3-4-1 drives the wheel 3-4-2 to rotate, the fourth gear 3-4-2-1 on the wheel 3-4-2 will drive the first lead screw 3-3-1 to rotate through the third gear 3-3-4. Similarly, the first lead screw 3-3-1 will drive the second slider 3-3-3 to rotate or rotate relative to the second slider 3-3-3. Since the second slider 3-3-3 is vertically slidably connected to the second guide rail 3-1, the second slider 3-3-3 cannot rotate. Therefore, the first lead screw 3-3-1 can only rotate relative to the second slider 3-3-3. Furthermore, the first lead screw 3-3-1 drives the second slider 3-3-3 to slide downward through a threaded transmission. Furthermore, the electronic screen body 1, which is fixedly connected to the second slider 3-3-3, slides downward, while the cleaning mechanism 4 installed on the second gear 3-3-2 will not be displaced.

[0051] If the second lead screw 3-4-1 rotates relative to the wheel 3-4-2, the second lead screw 3-4-1 drives the wheel 3-4-2 to slide downward through the threaded transmission. The third gear 3-3-4 of the first transmission mechanism 3-3, which is slidably connected to the slide rail 3-4-2-3 in the wheel 3-4-2, is a part of the first transmission mechanism 3-3. Therefore, the third gear 3-3-4 and the slide rail 3-4-2-3 are slidably connected. This can be seen as the first transmission mechanism 3-3 and the slide rail 3-4-2-3 sliding downward with the wheel 3-4-2. Furthermore, the second slider 3-3-3 and the second gear 3-3-2 move downward accordingly, thereby driving the electronic screen body 1 and the cleaning mechanism 4 to move downward simultaneously.

[0052] like Figure 5When the second lead screw 3-4-1 rotates, a frictional force (hereinafter referred to as the first frictional force) is generated between the second lead screw 3-4-1 and the wheel 3-4-2. Obviously, the magnitude of the first frictional force is proportional to the interaction force between the fourth gear 3-4-2-1 and the third gear 3-3-4. This interaction force causes the first lead screw 3-3-1 to have a rotational tendency, and further, causes the first lead screw 3-3-1 to have a rotational tendency relative to the second slider 3-3-3, thus generating a frictional force (hereinafter referred to as the second frictional force) between the first lead screw 3-3-1 and the second slider 3-3-3. The maximum static frictional force of the threaded connection between the first lead screw 3-3-1 and the second slider 3-3-3 is much smaller than that of the second lead screw 3-4-1. The maximum static friction force of the threaded connection between the first transmission mechanism 3-3 and the second transmission mechanism 3-4 is such that when the first transmission mechanism 3-3 and the second transmission mechanism 3-4 are in a free state, the second friction force will preferentially overcome the maximum static friction force of the threaded connection between the first lead screw 3-3-1 and the second slider 3-3-3. At the same time, the interaction force between the fourth gear 3-4-2-1 and the third gear 3-3-4 cannot allow the first friction force to overcome the maximum static friction force of the threaded connection between the second lead screw 3-4-1 and the wheel 3-4-2. Therefore, in summary, the wheel 3-4-2 drives the first lead screw 3-3-1 to rotate, and further, the second slider 3-3-3 drives the electronic screen body 1 to slide downward, and the cleaning mechanism 4 will not be displaced.

[0053] As the second slider 3-3-3 slides downwards, the second gear 3-3-2, which slides downwards, moves down to the tooth 3-2-2 of the first rotating shaft 3-2 and meshes with it. Since the tooth 3-2-2 cannot rotate, it limits the second gear 3-3-2, preventing it from rotating. Furthermore, the second gear 3-3-2 prevents the first lead screw 3-3-1 from rotating. At this point, the entire first transmission mechanism 3-3 becomes a fixed part that can only slide up and down along the second guide rail 3-1. Consequently, the interaction force between the fourth gear 3-4-2-1 and the third gear 3-3-4 allows the first frictional force to overcome the second lead screw 3-4-2-1. The maximum static friction between the threaded connection 1 and the wheel 3-4-2 causes the second lead screw 3-4-1 to rotate relative to the wheel 3-4-2. Further, the second slider 3-3-3 and the second gear 3-3-2 move downwards, thereby driving the electronic screen body 1 and the cleaning mechanism 4 to move downwards simultaneously, until the second slider 3-3-3 passes over the gear tooth 3-2-2. The device then resumes operation where the second slider 3-3-3 drives the electronic screen body 1 to slide downwards, and the cleaning mechanism 4 does not experience displacement. Thus, as the second slider 3-3-3 moves downwards with the drive mechanism 3, it intermittently passes over the gear tooth 3-2-2, ensuring that the second slider 3-3-3 always maintains a downward movement, while the cleaning mechanism 4 intermittently performs a downward movement.

[0054] This invention utilizes two interconnected lead screw drives for transmission. When the nut component in one lead screw drive is fixed, the other lead screw drive moves, ensuring seamless coordination between the two drives. This allows the electronic screen body 1 to move at a constant speed, while the cleaning mechanism 4 moves intermittently. Of the two drives, the upper drive only controls the movement of the electronic screen body, while the lower drive controls both the electronic screen body 1 and the cleaning mechanism 4. When the transmission between the two drives is seamless, the electronic screen body 1 moves at a constant speed, while the cleaning mechanism 4 moves intermittently with the distance traveled by each drive as its amplitude. Furthermore, the displacement of the cleaning mechanism 4 relative to the electronic screen body 1 is fixed each time it is stationary. This ensures that, unlike traditional drives where the electronic screen body 1 moves at a constant speed and the cleaning mechanism 4 moves intermittently, the movements of the electronic screen body 1 and the cleaning mechanism 4 are typically controlled independently. The method of linking via electronic components can introduce motion errors, causing misalignment between the electronic screen body 1 and the cleaning mechanism 4 relative to the predetermined displacement. Long-term use amplifies these errors, leading to significant misalignment in the coordinated movement between the electronic screen body 1 and the cleaning mechanism 4. This prevents the cleaning mechanism 4 from completely cleaning the electronic screen body 1. For example, if the displacement of the cleaning mechanism 4 is relatively small compared to the predetermined value, after repeated use, the cleaning mechanism 4 may be below its initial position at the beginning of the cleaning process, preventing the upper part of the electronic screen body 1 from being cleaned. In contrast, this invention uses a mechanical structure to coordinate the movement between the electronic screen body 1 and the cleaning mechanism 4 in the mechanical transmission stage. This ensures that the electronic screen body 1 and the cleaning mechanism 4 do not misalign, thus guaranteeing that the entire plane of the electronic screen body 1 can be cleaned, improving the cleaning effect of the equipment.

[0055] As a further embodiment of the present invention, the gear tooth 3-2-2 is an elastic telescopic member that can elastically contract in the vertical direction.

[0056] During operation, when the second gear 3-3-2 is about to move downwards to the tooth 3-2-2, if the tooth 3-2-2 is not vertically aligned with the tooth gap of the second gear 3-3-2, the second gear 3-3-2 will press the tooth 3-2-2 downwards, causing the tooth 3-2-2 to retract downwards. As the second gear 3-3-2 rotates until the tooth 3-2-2 is vertically aligned with the tooth gap of the second gear 3-3-2, the tooth 3-2-2, under the action of its own elastic element, extends upwards and engages in the tooth gap of the second gear 3-3-2, thereby stopping the second gear 3-3-2 from rotating.

[0057] By utilizing the elastically contractible nature of gear tooth 3-2-2, when the tooth gap of gear tooth 3-2-2 is not vertically aligned with the second gear 3-3-2, the second gear 3-3-2 will not damage gear tooth 3-2-2 as it continues to move downwards, thus preventing equipment damage and improving equipment stability.

[0058] As a further embodiment of the present invention, the cleaning mechanism 4 includes a fixed block 4-4, a second connecting rod 4-4-4 fixedly connected to the side wall of the fixed block 4-4, the second connecting rod 4-4-4 being rotatably connected to the upper end of the first lead screw 3-3-1, a wiping mechanism 4-3 horizontally mounted through the fixed block 4-4, the wiping mechanism 4-3 including a second rotating shaft 4-3-1, the second rotating shaft 4-3-1 passing through and movably mounted on the fixed block 4-4, a third slider 4-4-5 horizontally movably mounted on the left end of the second rotating shaft 4-3-1, a third guide rail 4-2 and a rack 4-1 vertically mounted on the left inner wall of the housing 2, the third slider 4-4-5 being connected to the first lead screw 3-3-1. Three guide rails 4-2 are slidably connected; multiple sponge blocks 4-3-2 are fixedly connected to the outer wall of the second rotating shaft 4-3-1, which are equidistantly distributed and located between the third slider 4-4-5 and the fixed block 4-4; a third connecting rod 4-4-6 is fixedly connected to the side wall of the third slider 4-4-5; a fourth connecting rod 4-4-9 is rotatably connected to the second rotating shaft 4-3-1; a fifth gear 4-4-7 is rotatably connected to the third connecting rod 4-4-6; the fifth gear 4-4-7 meshes with the rack 4-1; a connecting rod 4-4-8 is rotatably mounted on the end face of the fifth gear 4-4-7; and the other end of the connecting rod 4-4-8 is rotatably connected to the fourth connecting rod 4-4-9.

[0059] During operation, the first transmission mechanism 3-3 in the drive mechanism 3 first drives the electronic screen body 1 to descend, while the cleaning mechanism 4 remains stationary. At the same time, the liquid supply mechanism 5 sprays cleaning liquid onto the sponge block 4-3-2 in the cleaning mechanism 4. Then, the drive mechanism 3 switches to the second transmission mechanism 3-4, and the electronic screen body 1 descends. The first lead screw 3-3-1 drives the cleaning mechanism 4 to descend. During this descent, the cleaning mechanism 4 drives the fifth gear 4-4-7 to descend. During the descent, the fifth gear 4-4-7 rotates under the action of the rack 4-1 meshing with it. Then, the fifth gear 4-4-7 drives the fourth connecting rod 4-4-9 to reciprocate horizontally through the connecting rod 4-4-8. In turn, the fourth connecting rod 4-4-9 drives the wiping mechanism 4-3 to reciprocate horizontally, thereby enabling the sponge block 4-3-2 on the wiping mechanism 4-3 to clean the screen surface of the electronic screen body 1.

[0060] The cleaning mechanism 4 is driven by a purely mechanical structure to clean the screen body 1 when it is relatively stationary. This avoids the problem of insufficient cleaning time of the cleaning mechanism 4 when it is relatively stationary due to errors in conventional electronic control, which leads to poor cleaning effect of the screen body 1. Furthermore, this invention makes the cleaning process more stable and efficient.

[0061] As a further embodiment of the present invention, the first rotating shaft 3-2 and the second guide rail 3-1 are rotatably connected by a torsion spring, and the rotation angle is fixed. A first gear 3-2-1 is provided on a portion of the side wall of the first rotating shaft 3-2, and the first gear 3-2-1 is a part of a complete gear segment arc surface. A telescopic rod 4-3-3 is fixedly connected to the right end of the second rotating shaft 4-3-1, and a first bevel gear 4-3-4 is fixedly connected to the right end of the telescopic rod 4-3-3. A first connecting rod 4-4-1 is fixedly connected to the fixing block 4-4, and a second bevel gear 4-4-2 is rotatably connected to the first connecting rod 4-4-1. The second bevel gear 4-4-2 meshes with the first bevel gear 4-3-4 and the first gear 3-2-1 respectively.

[0062] During operation, when the cleaning mechanism 4 is not moving downwards, that is, when gear 3-2-2 is not meshing with the second gear 3-3-2, at this time, if Figure 6 The cleaning surface of the sponge block 4-3-2 faces upward, and the liquid supply mechanism 5 sprays cleaning liquid onto the cleaning surface. Then, when the cleaning mechanism 4 moves downward, the gear teeth 3-2-2 mesh with the second gear 3-3-2. At this time, the first rotating shaft 3-2 rotates at a fixed angle through the gear teeth 3-2-2. Then, the first rotating shaft 3-2 stops and limits the second gear 3-3-2, preventing it from rotating. During this process, the first gear 3-2-1 on the first rotating shaft 3-2 drives the first bevel gear 4-3-4 to rotate through the second bevel gear 4-4-2, which in turn drives the wiping mechanism 4-3 to rotate, so that the cleaning surface of the sponge block 4-3-2 faces and is in close contact with the screen surface of the electronic screen body 1.

[0063] By spraying the cleaning solution directly onto the cleaning surface of the sponge block 4-3-2 with the cleaning surface facing upwards towards the liquid supply mechanism 5 when adding cleaning solution to the cleaning mechanism 4, the cleaning solution can act more directly on the electronic screen body 1 when the cleaning mechanism 4 is working, thereby further enhancing the cleaning effect.

[0064] As a further embodiment of the present invention, a scraper is fixedly installed at the lower end of the cleaning mechanism 4, and the electronic screen body 1 will come into close contact with the scraper when it passes over the scraper.

[0065] During operation, when the electronic screen body 1 is scraped, the screen surface of the electronic screen body 1 is in close contact with the scraper, so that the scraper can scrape the screen surface once, and further remove the foam or washing marks that may be generated on the screen surface during the cleaning process.

[0066] By scraping the screen surface with a scraper, foam or washing marks that may be generated during the cleaning process are removed, further improving the cleaning quality of the electronic screen body 1.

[0067] As a further embodiment of the present invention, the liquid supply mechanism 5 includes a spraying mechanism 5-1, which is installed above the wiping mechanism 4-3. The spraying mechanism 5-1 includes a fixing rod 5-1-1, which is fixedly connected to a fifth connecting rod 5-1-2. The fifth connecting rod 5-1-2 is fixedly connected to the upper end of the fixing block 4-4. The lower end of the fifth connecting rod 5-1-2 is fixedly installed with a nozzle 5-1-3 at the position corresponding to the sponge block 4-3-2.

[0068] The liquid supply mechanism 5 also includes a liquid outlet cylinder 5-2, which is fixedly connected to the third slider 4-4-5. A pressure plate 5-3 is vertically slidably mounted on the liquid outlet cylinder 5-2. The liquid outlet cylinder 5-2 and the pressure plate 5-3 together form a sealed container. A sixth connecting rod 5-3-1 is fixedly connected to the upper end of the pressure plate 5-3. The sixth connecting rod 5-3-1 is fixedly connected to the first slider 1-1. A liquid outlet pipe 5-2-1 and a liquid inlet pipe 5-2-2 are fixedly mounted on the liquid outlet cylinder 5-2. The liquid outlet pipe 5-2-1 and the nozzle 5-1-3 are both connected to an external connecting pipe. A cleaning liquid container is connected to the external part of the liquid inlet pipe 5-2-2. A one-way valve is provided inside both the liquid outlet pipe 5-2-1 and the liquid inlet pipe 5-2-2.

[0069] During operation, when the electronic screen body 1 is retracted into the housing 2, as the electronic screen body 1 moves downward relative to the cleaning mechanism 4, the pressure plate 5-3 moves downward relative to the liquid outlet cylinder 5-2, thereby reducing the volume of the cavity inside the liquid outlet cylinder 5-2. This squeezes the cleaning liquid inside the cavity, causing it to be discharged through the liquid outlet pipe 5-2-1 from the nozzle 5-1-3 and sprayed onto the sponge block 4-3-2. When the electronic screen body 1 extends out of the housing 2, the pressure plate 5-3 moves upward relative to the liquid outlet cylinder 5-2 as the electronic screen body 1 moves upward relative to the cleaning mechanism 4, thereby increasing the volume of the cavity inside the liquid outlet cylinder 5-2. This creates a negative pressure inside the cavity, allowing the cleaning liquid to be drawn from the cleaning liquid container through the liquid inlet pipe 5-2-2 and filled into the liquid outlet cylinder 5-2 for use in the subsequent process of the electronic screen body 1 retracting into the housing 2.

[0070] By utilizing simple mechanical components, the cleaning solution is sprayed, resulting in a tighter fit between the equipment and a more stable working process.

[0071] As a further embodiment of the present invention, the upper end of the housing 2 is detachable.

[0072] The housing 2 is designed to be detachable, which facilitates the installation and disassembly of the electronic screen body and related components, making the equipment more convenient and faster to use.

[0073] As a further embodiment of the present invention, the track grooves of the first guide rail 2-1, the second guide rail 3-1 and the third guide rail 4-2 are square.

[0074] The track grooves of the relevant guide rails in the equipment are designed to be square, making it easier to install and remove the electronic screen body and related components from the track, thus making the equipment more convenient and faster to use.

[0075] As a further aspect of the present invention, the surface of the scraper that can contact the electronic screen body 1 is made of a flexible absorbent material.

[0076] The surface of the scraper that contacts the electronic screen body 1 is made of flexible absorbent material, which better protects the electronic screen body 1 and prevents the scraper from damaging the screen surface of the electronic screen body 1.

[0077] This invention drives a cleaning mechanism to move intermittently relative to the electronic screen body. During this relative movement, cleaning fluid is sprayed; when the mechanism is stationary, the screen body is cleaned. This ensures that a small amount of cleaning fluid is sprayed to clean a portion of the screen surface, precisely targeting the desired cleaning volume without leaving any residue. Furthermore, this process does not affect the screen body's retraction process. During retraction, the screen body maintains a uniform downward linear motion relative to the housing. This saves on cleaning fluid usage without compromising other functions of the screen body and provides a suitable storage environment for the screen body.

[0078] This invention utilizes two interconnected lead screw drives for transmission. When the nut component in one lead screw drive is fixed, the other lead screw drive moves. This ensures seamless, gapless operation between the two drives, resulting in uniform motion of the electronic screen body and intermittent motion of the cleaning mechanism. The upper drive controls only the movement of the electronic screen body, while the lower drive controls both the electronic screen body and the cleaning mechanism. When the transmission between the two drives is seamless, the electronic screen body moves at a uniform speed, while the cleaning mechanism moves intermittently with the distance traveled by each drive component in a single cycle. Furthermore, the displacement of the cleaning mechanism relative to the electronic screen body is fixed each time it comes to rest. This ensures that, unlike traditional drives where the electronic screen body moves at a uniform speed and the cleaning mechanism moves intermittently, the movements of the electronic screen body and the cleaning mechanism are typically controlled independently. The method of linking via electronic components can introduce motion errors, causing misalignment between the electronic screen body and the cleaning mechanism relative to the predetermined displacement. Long-term use amplifies these errors, leading to significant misalignment in the coordinated movement between the electronic screen body and the cleaning mechanism. This prevents the cleaning mechanism from completely cleaning the electronic screen body. For example, if the displacement of the cleaning mechanism is relatively small compared to the predetermined value, after repeated use, the cleaning mechanism may be below its initial position at the start of cleaning, thus preventing the upper part of the electronic screen body from being cleaned. In contrast, this invention uses a mechanical structure to coordinate the movement between the electronic screen body and the cleaning mechanism in the mechanical transmission stage. This ensures that the electronic screen body and the cleaning mechanism do not misalign, thereby guaranteeing that the entire plane of the electronic screen body can be cleaned, improving the cleaning effect of the equipment.

[0079] This invention utilizes the elastically contractible nature of gear teeth to prevent damage to the gear teeth when the tooth gap is not vertically aligned with the second gear, thus preventing equipment damage and improving equipment stability.

[0080] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A driving mechanism (3), characterized in that, The drive mechanism (3) is connected to both the electronic screen body (1) and the cleaning mechanism (4) to drive the electronic screen body (1) to move at a constant speed on the housing (2) and to drive the cleaning mechanism (4) to move intermittently. The drive mechanism (3) includes a first transmission mechanism (3-3) and a second transmission mechanism (3-4). The first transmission mechanism (3-3) includes a first lead screw (3-3-1), a third gear (3-3-4) is fixedly connected to the lower end of the first lead screw (3-3-1), a second slider (3-3-3) is threadedly connected to the first lead screw (3-3-1), the second slider (3-3-3) is slidably connected to the housing (2), a second gear (3-3-2) is vertically slidably connected to the upper end of the first lead screw (3-3-1), the second gear (3-3-2) is rotatably mounted on the top surface of the second slider (3-3-3), the second slider (3-3-3) is connected to the electronic screen body (1), and the driving cleaning mechanism (4) is rotatably connected to the upper end of the first lead screw (3-3-1). The second transmission mechanism (3-4) is located below the third gear (3-3-4). The second transmission mechanism (3-4) includes a second lead screw (3-4-1), and a wheel (3-4-2) is threadedly connected to the top end of the second lead screw (3-4-1). The wheel (3-4-2) includes a turntable (3-4-2-2), and a slide rail (3-4-2-3) is provided on the turntable (3-4-2-2). The third gear (3-3-4) is slidably connected to the slide rail (3-4-2-3). A fourth gear (3-4-2-1) is fixedly connected to the upper end of the turntable (3-4-2-2), and the fourth gear (3-4-2-1) meshes with the third gear (3-3-4). A motor (3-5) is drivenly connected to the lower end of the second lead screw (3-4-1), and the motor (3-5) is fixedly connected to the housing (2). A first rotating shaft (3-2) is installed inside the housing (2). Multiple gear teeth (3-2-2) are vertically installed on the first rotating shaft (3-2) and are evenly spaced. The gear teeth (3-2-2) are located below the second gear (3-3-2) and mesh with the second gear (3-3-2). The maximum static friction force of the threaded connection between the first lead screw (3-3-1) and the second slider (3-3-3) is much smaller than the maximum static friction force of the threaded connection between the second lead screw (3-4-1) and the wheel (3-4-2), so that when the first transmission mechanism (3-3) and the second transmission mechanism (3-4) are in a free state, the second friction force will preferentially overcome the maximum static friction force of the threaded connection between the first lead screw (3-3-1) and the second slider (3-3-3), wherein the second friction force is the friction force generated between the first lead screw (3-3-1) and the second slider (3-3-3).

2. The driving mechanism according to claim 1, characterized in that: During operation, the motor (3-5) drives the second lead screw (3-4-1) to rotate, and the second lead screw (3-4-1) drives the wheel (3-4-2) to rotate or rotate relative to the wheel (3-4-2); When the second lead screw (3-4-1) drives the wheel (3-4-2) to rotate, the second slider (3-3-3) drives the electronic screen body (1) to slide downward, and the cleaning mechanism (4) will not be displaced; When the second gear (3-3-2) sliding downward engages with the gear teeth (3-2-2), the second lead screw (3-4-1) rotates relative to the wheel (3-4-2), and the second slider (3-3-3) and the second gear (3-3-2) move downward accordingly, thereby driving the electronic screen body (1) and the cleaning mechanism (4) to move downward simultaneously, and the cleaning mechanism (4) cleans the screen surface of the electronic screen body (1) during the descent.

3. The driving mechanism (3) according to claim 1, characterized in that: A second guide rail (3-1) is fixedly installed on the inner wall of the right side of the housing (2). The second slider (3-3-3) is vertically slidably connected to the second guide rail (3-1). A first guide rail (2-1) is fixedly installed on the inner wall of the left side of the housing (2). A first slider (1-1) is slidably connected inside the first guide rail (2-1). The first slider (1-1) and the second slider (3-3-3) are fixedly connected to the bottom of the left and right side walls of the electronic screen body (1) respectively. The first rotating shaft (3-2) is vertically installed on the second guide rail (3-1).

4. The driving mechanism (3) according to claim 1, characterized in that: The gear teeth (3-2-2) are elastic telescopic components that can elastically contract in the vertical direction.

5. The driving mechanism (3) according to claim 1, characterized in that: The upper part of the housing (2) is detachable.

6. A retractable electronic screen, characterized in that, Includes the drive mechanism (3) as described in claim 3, as well as the cleaning mechanism (4) and the liquid supply mechanism (5); The cleaning mechanism (4) includes a fixed block (4-4), and a second connecting rod (4-4-4) is fixedly connected to the side wall of the fixed block (4-4). The second connecting rod (4-4-4) is rotatably connected to the upper end of the first lead screw (3-3-1). A wiping mechanism (4-3) is horizontally installed through the fixed block (4-4). The wiping mechanism (4-3) includes a second rotating shaft (4-3-1), which is movably installed through the fixed block (4-4). A plurality of sponge blocks (4-3-2) are fixedly connected to the outer wall of the second rotating shaft (4-3-1) in an equidistant manner. The driving mechanism (3) is connected to the sponge block (4-3-2) and can drive the cleaning surface of the sponge block (4-3-2) toward the liquid supply mechanism (5), or drive the cleaning surface of the sponge block (4-3-2) toward and closely adhere to the screen surface of the electronic screen body (1).

7. A lifting electronic screen according to claim 6, characterized in that: The third slider (4-4-5) is horizontally and movably mounted on the left end of the second rotating shaft (4-3-1). The third guide rail (4-2) and the rack (4-1) are vertically mounted on the inner wall of the left side of the housing (2). The third slider (4-4-5) is slidably connected to the third guide rail (4-2). The sponge block (4-3-2) is located between the third slider (4-4-5) and the fixed block (4-4). A third connecting rod (4-4-6) is fixedly connected to the side wall of the third slider (4-4-5). A fourth connecting rod (4-4-9) is rotatably connected to the second rotating shaft (4-3-1). A fifth gear (4-4-7) is rotatably connected to the front end of the third connecting rod (4-4-6). The fifth gear (4-4-7) meshes with the rack (4-1). A connecting rod (4-4-8) is rotatably mounted on the end face of the fifth gear (4-4-7). The other end of the connecting rod (4-4-8) is rotatably connected to the fourth connecting rod (4-4-9).

8. A lifting electronic screen according to claim 7, characterized in that: The track grooves of the first guide rail (2-1), the second guide rail (3-1), and the third guide rail (4-2) are square.

9. A lifting electronic screen according to claim 8, characterized in that: A second guide rail (3-1) is fixedly installed on the inner wall of the right side of the housing (2). A first rotating shaft (3-2) is vertically installed on the second guide rail (3-1). The first rotating shaft (3-2) and the second guide rail (3-1) are rotatably connected by a torsion spring, and the rotation angle is fixed. A first gear (3-2-1) is provided on a part of the side wall of the first rotating shaft (3-2). The first gear (3-2-1) is a part of a complete gear segment arc surface. A telescopic rod (4-3-3) is fixedly connected to the right end of the second rotating shaft (4-3-1). A first bevel gear (4-3-4) is fixedly connected to the right end of the telescopic rod (4-3-3). A first connecting rod (4-4-1) is fixedly connected to the fixed block (4-4). A second bevel gear (4-4-2) is rotatably connected to the first bevel gear (4-3-4) and the first gear (3-2-1) respectively.

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