Screen wiping device

Abstract

The present invention discloses a screen wiping device, comprising: a base, a movable module, a wiping assembly, a first electromagnetic component, a magnetic component and a wiping cloth, wherein the movable module is installed on the base, the movable module can move relative to the base in the X direction, and the movable module can rotate relative to the base around the Z direction; the wiping assembly is installed on the movable module, and the wiping assembly moves with the movable module, and the wiping assembly is used to wipe the screen; the first electromagnetic component is installed on the wiping assembly; the magnetic component is arranged opposite to the first electromagnetic component, and when the first electromagnetic component is energized, the first electromagnetic component and the magnetic component attract each other through magnetic force; the wiping cloth is arranged on the wiping assembly, and the wiping cloth is located between the first electromagnetic component and the magnetic component. The screen wiping device can automatically wipe the screen, and the wiping cloth can be fixed on the wiping assembly by using the adsorption effect of the first electromagnetic component and the magnetic component, with good wiping effect and high wiping efficiency, and the cloth can be easily replaced to achieve rapid response.

Description

Technical Field

[0001] The invention relates to the technical field of screen printing, and more specifically, to a screen wiping device. Background Art

[0002] In the cell screen printing industry, the screen is used as a template for printing patterns, the printing paste is on the top of the porcelain, and the cell is on the bottom of the screen. The paste penetrates the pattern on the screen under the extrusion of the scraper, leaving the desired pattern on the surface of the cell.

[0003] During the production process, the screen needs to be wiped for different process patterns and slurries to remove the slurry outside the pattern range and the dry slurry blocked in the screen pattern to improve the accuracy of the printed pattern.

[0004] In the related art, the screen wiping work is usually done manually by wiping the screen with a dust-free cloth. The wiping effect is poor, which easily causes batch defects, and the wiping effect of different wiping personnel is uncontrollable. In the case of insufficient labor force, manual wiping work is particularly heavy and inefficient. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention proposes a screen wiping device, which can automatically wipe the screen with good wiping effect and high wiping efficiency.

[0006] According to an embodiment of the present invention, the screen wiping device includes: a base, a movable module, a wiping assembly, a first electromagnetic component, a magnetic component and a wiping cloth, wherein the movable module is installed on the base, the movable module can move relative to the base in the X direction, and the movable module can rotate relative to the base around the Z direction; the wiping assembly is installed on the movable module, and the wiping assembly moves with the movable module, and the wiping assembly is used to wipe the screen; the first electromagnetic component is installed on the wiping assembly; the magnetic component is arranged opposite to the first electromagnetic component, and when the first electromagnetic component is energized, the first electromagnetic component and the magnetic component are attracted to each other by magnetic force; the wiping cloth is arranged on the wiping assembly, and the wiping cloth is located between the first electromagnetic component and the magnetic component.

[0007] According to the screen wiping device of the embodiment of the present invention, the movable module drives the wiping component to move and rotate, so that the screen can be automatically wiped, and the adsorption effect of the first electromagnetic component and the magnetic component can be used to stably fix the wiping cloth on the wiping component, so that the wiping effect is good and the wiping efficiency is high. Moreover, when the wiping cloth needs to be replaced, the cloth can be easily replaced by powering off the first electromagnetic component, so that a quick response can be achieved.

[0008] In addition, the screen wiping device according to the above embodiment of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the wiping assembly includes a main body and a wiping head, the wiping head is movable relative to the main body to make the wiping assembly retractable, the wiping cloth is covered on the wiping head, and the wiping head is movable between a wiping station and a cloth changing station. At the wiping station, the wiping head wipes the screen with the wiping cloth; at the cloth changing station, the wiping cloth on the wiping head is replaceable.

[0010] Optionally, a telescopic track is provided on the main body, and the wiping head is movable along the telescopic track.

[0011] According to some embodiments of the present invention, the screen wiping device also includes: a cloth changing bracket, on which an old cloth picking piece and a new cloth picking piece are provided, the old cloth picking piece is movable relative to the cloth changing bracket, and the new cloth picking piece is movable relative to the cloth changing bracket, wherein, when the wiping head is located at the cloth changing position, the first electromagnetic component is powered off, the old cloth picking piece removes the magnetic component and the old wiping cloth located at the wiping head, the new cloth picking piece takes the new wiping cloth and places it on the wiping head, and then the old cloth picking piece places the magnetic component on the new wiping cloth.

[0012] Optionally, the old cloth picking member is a first suction cup, and the first suction cup is used to suck the old wiping cloth; the new cloth picking member is a second suction cup, and the second suction cup is used to suck the new wiping cloth.

[0013] Optionally, a second electromagnetic component is provided on the old cloth taking component. When the wiping head is located at the cloth changing position, the second electromagnetic component is energized, and the second electromagnetic component and the magnetic component are attracted to each other by magnetic force to take the magnetic component from the wiping head.

[0014] According to some embodiments of the present invention, a containing box is installed on the cloth changing bracket, the new wiping cloth is suitable for being placed in the containing box, and the new cloth taking member is movable between the cloth changing station and the containing box.

[0015] Optionally, a material box lifting module is provided on the cloth changing bracket, and the material box lifting module is movable in the Z direction relative to the cloth changing bracket, and the accommodating box is provided on the material box lifting module and moves with the material box lifting module.

[0016] According to some embodiments of the present invention, the screen wiping device further includes: a wiping information acquisition component, which is installed on the wiping head, and the wiping information acquisition component is connected to a controller of the screen wiping device, and the controller acquires wiping information of the wiping head through the wiping information acquisition component, and controls the operation of the screen wiping device according to the wiping information.

[0017] Optionally, the wiping information acquisition component includes a pressure sensor, which is installed on the wiping head and is used to obtain the wiping force of the wiping head.

[0018] Optionally, the wiping information acquisition component includes a cylinder and a proportional regulating valve, the cylinder is deformed as the wiping head wips, and the proportional regulating valve obtains the wiping force of the wiping head through the deformation of the cylinder.

[0019] Optionally, a sponge pad is provided on the wiping head, and the wiping cloth cover is provided on the sponge pad.

[0020] Optionally, the first electromagnetic component is an electromagnet or an electromagnetic coil, and the magnetic component is a permanent magnet or an iron component.

[0021] According to some embodiments of the present invention, the magnetic member is annular, and when the first electromagnetic member adsorbs the magnetic member onto the wiping head, part of the wiping cloth is located in the magnetic member, and part of the wiping cloth located in the magnetic member protrudes out of the magnetic member.

[0022] According to some embodiments of the present invention, the movable module includes: a moving module and a rotating module, the moving module is installed on the base, and the moving module is movable in the X direction relative to the base; the rotating module is installed on the moving module, and the rotating module is rotatable around the Z direction relative to the moving module; wherein the wiping assembly is installed on the rotating module.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic top view of a screen wiping device according to an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A schematic side view of the middle screen wiping device;

[0026] Figure 3 is a schematic side view of a screen wiping device according to an embodiment of the present invention;

[0027] Figure 4 yes Figure 3 A magnified view of the partial structure of the middle screen wiping device;

[0028] Figure 5 Schematic diagram of a partial structure of a screen wiping device according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] 10: Silk screen;

[0031] 1: movable module; 11: moving module; 12: rotating module;

[0032] 2: wiping assembly; 21: body; 22: wiping head; 23: telescopic track;

[0033] 3: The first electromagnetic component;

[0034] 4: Magnetic parts;

[0035] 5: wiping cloth; 51: sponge pad;

[0036] 6: cloth changing bracket; 61: old cloth taking piece; 62: new cloth taking piece; 63: second electromagnetic component; 64: accommodating box; 65: material box lifting module;

[0037] 7: Pressure sensor. DETAILED DESCRIPTION

[0038] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0039] The screen wiping device according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings, wherein the X direction, the Y direction and the Z direction are all described by taking the Cartesian rectangular coordinate system indicated by the arrows in the accompanying drawings as an example.

[0040] Reference Figure 1-Figure 4 As shown, the screen wiping device according to an embodiment of the present invention includes: a base, a movable module 1, a wiping assembly 2, a first electromagnetic component 3, a magnetic component 4 and a wiping cloth 5.

[0041] The movable module 1 is mounted on the base, and the movable module 1 can move relative to the base in the X direction, and the movable module 1 can rotate relative to the base around the Z direction; the wiping assembly 2 can be mounted on the movable module 1, and the wiping assembly 2 can move with the movable module 1, and the wiping assembly 2 is used to wipe the screen 10. In this way, the wiping assembly 2 can be driven by the movable module 1 to achieve movement and rotation, and the wiping assembly 2 can wipe the screen 10 according to the set trajectory. The movement range of the wiping assembly 2 can traverse the screen 10, thereby ensuring that the entire pattern area of ​​the screen plate of the screen 10 is wiped.

[0042] The first electromagnetic component 3 is installed on the wiping assembly 2; the magnetic component 4 is arranged opposite to the first electromagnetic component 3, and when the first electromagnetic component 3 is energized, the first electromagnetic component 3 and the magnetic component 4 are attracted to each other by magnetic force; the wiping cloth 5 is arranged in the wiping assembly 2, and the wiping cloth 5 is located between the first electromagnetic component 3 and the magnetic component 4.

[0043] That is to say, the wiping cloth 5 can be covered on the wiping assembly 2, the first electromagnetic component 3 is installed in the wiping assembly 2, and the magnetic component 4 is located outside the wiping cloth 5. During the wiping process, the first electromagnetic component 3 is energized, and the wiping cloth 5 is adsorbed on the wiping assembly 2 through the magnetic adsorption effect of the first electromagnetic component 3 and the magnetic component 4. On the one hand, the wiping cloth 5 can be stably fixed on the wiping assembly 2 during the wiping process to avoid the wiping cloth 5 from being misplaced, which can improve the wiping effect and the yield rate; on the other hand, when the wiping cloth 5 needs to be replaced, the first electromagnetic component 3 is powered off, and the magnetic adsorption effect between the first electromagnetic component 3 and the magnetic component 4 is reduced or disappears, so the old wiping cloth can be easily removed and replaced with a new one. The cloth replacement is convenient and efficient, and a quick response can be achieved.

[0044] It can be seen that the screen wiping device according to the embodiment of the present invention can automatically wipe the screen 10 by driving the wiping component 2 to move and rotate through the movable module 1, and utilize the adsorption effect of the first electromagnetic component 3 and the magnetic component 4 to stably fix the wiping cloth 5 on the wiping component 2, which has the advantages of good wiping effect, high wiping efficiency, convenient cloth changing, and quick response.

[0045] Combination Figure 1-Figure 3As shown, in the screen wiping device according to the embodiment of the present invention, the movable module 1 may include: a moving module 11 and a rotating module 12. The moving module 11 is mounted on the base, and the moving module 11 is movable in the X direction relative to the base; the rotating module 12 is mounted on the moving module 11, and the rotating module 12 is rotatable around the Z direction relative to the moving module 11 (that is, it moves along the T direction shown in the figure); wherein, the wiping assembly 2 is mounted on the rotating module 12. The moving module 11 drives the wiping assembly 2 to move in the X direction, and the rotating module 12 drives the wiping assembly 2 to rotate around the Z direction. The moving module 11 and the rotating module 12 can move independently. The cooperation of the moving module 11 and the rotating module 12 realizes mechanized wiping, so that the range of movement of the wiping assembly 2 can ensure that the entire pattern area of ​​the screen 10 can be wiped to wipe off excess slurry, or wipe off dry slurry blocked in the pattern, thereby improving the accuracy of the printed pattern and improving the wiping efficiency.

[0046] According to the screen wiping device of the embodiment of the present invention, Figure 2 and Figure 3 As shown, the wiping assembly 2 may include a main body 21 and a wiping head 22, wherein the wiping head 22 is movable relative to the main body 21 to make the wiping assembly 2 retractable. In this way, in conjunction with the movement and rotation of the movable module 1, the movable range of the wiping head 22 can be increased, the flexibility of the wiping head 22 can be improved, the wiping area can be increased, and the wiping efficiency can be improved.

[0047] The wiping cloth 5 can be covered on the wiping head 22, and the wiping cloth 5 can contact the screen of the screen 10 to wipe and clean the screen. Figure 2 and Figure 3 As shown, the wiping head 22 is movable between the wiping station and the cloth changing station. At the wiping station, the wiping head 22 wipes the screen 10 through the wiping cloth 5; at the cloth changing station, the wiping cloth 5 on the wiping head 22 can be replaced. On the one hand, at the wiping station, the action of replacing the wiping cloth 5 will not affect the normal wiping, and the wiping effect and wiping efficiency can be guaranteed; on the other hand, when the wiping cloth 5 needs to be replaced, the wiping head 22 moves to the cloth changing station, which is convenient for replacing the wiping cloth 5, can avoid accidents and improve safety.

[0048] Optionally, a telescopic track 23 may be provided on one of the body 21 and the wiping head 22, and the other of the body 21 and the wiping head 22 may be movable along the telescopic track 23, thereby the wiping assembly 2 may be telescopic. Figure 2 and Figure 3In the illustrated example, the telescopic track 23 extends in the X direction, and the wiping head 22 can move in the X direction along the telescopic track 23 relative to the body 21, so that the wiping assembly 2 is retractable in the X direction, with a simple structure and convenient use. It is understandable that the telescopic track 23 can also extend in the Y direction or other directions, and the telescopic movement of the wiping assembly 2 cooperates with the movement of the moving module 11 in the X direction and the rotation of the rotating module 12 around the Z direction, so that the movement range of the wiping head 22 covers the entire screen printing area. This is understandable to those skilled in the art, so it will not be repeated here.

[0049] According to some embodiments of the present invention, Figure 5 As shown, the screen wiping device also includes: a cloth changing bracket 6, on which an old cloth taking piece 61 and a new cloth taking piece 62 are provided, the old cloth taking piece 61 is movable relative to the cloth changing bracket 6, and the new cloth taking piece 62 is movable relative to the cloth changing bracket 6, thereby, the old cloth taking piece 61 and the new cloth taking piece 62 can cooperate to remove the old cloth that has been used on the wiping head 22 and replace it with a new cloth.

[0050] Among them, when the wiping head 22 is located at the cloth changing position, the first electromagnetic component 3 is powered off, the old cloth taking component 61 removes the magnetic component 4 and the old wiping cloth 5 located on the wiping head 22, the new cloth taking component 62 takes the new wiping cloth 5 and places it on the wiping head 22, and then the old cloth taking component 61 places the magnetic component 4 on the new wiping cloth 5.

[0051] In other words, when the wiping head 22 moves to the cloth changing station, the first electromagnetic component 3 is powered off and no longer attracts the magnetic component 4. The magnetic component 4 and the wiping cloth 5 are in a free state. In this case, the old cloth taking component 61 can easily remove the old wiping cloth 5 located on the magnetic component 4 of the wiping head 22, and the new cloth taking component 62 takes the new wiping cloth 5 and places the new wiping cloth 5 on the wiping head 22 to complete the cloth changing. Then, the old cloth taking component 61 can discard the old wiping cloth 5 and place the magnetic component 4 on the new wiping cloth 5. Then, the first electromagnetic component 3 is powered on again, and the replaced new wiping cloth 5 can be firmly clamped on the wiping head 22 through the adsorption effect of the first electromagnetic component 3 on the magnetic component 4. When the wiping head 22 returns to the wiping station, the new wiping cloth 5 can be used to wipe the screen 10. In this way, the replacement of the wiping cloth 5 can be realized in a coherent and efficient manner, and a quick response is achieved, and downtime is reduced, thereby increasing the amount of wiping completed per unit time.

[0052] Optionally, the old cloth taking member 61 is a first suction cup, which is used to suck the old wiping cloth 5, that is, the old wiping cloth 5 can be sucked by the first suction cup and moved and discarded; optionally, the new cloth taking member 62 is a second suction cup, which is used to suck the new wiping cloth 5, that is, the new wiping cloth 5 can be sucked by the second suction cup and moved. In this way, by sucking and grabbing the new wiping cloth 5 and the old wiping cloth 5, rapid cloth replacement can be achieved, and the suction reliability is high, and the cloth replacement reliability is good.

[0053] In some optional embodiments, such as Figure 5 As shown, a second electromagnetic component 63 is provided on the old cloth taking component 61. When the wiping head 22 is located at the cloth changing position, the second electromagnetic component 63 is energized, and the second electromagnetic component 63 and the magnetic component 4 are attracted to each other by magnetic force to take the magnetic component 4 from the wiping head 22.

[0054] It is understandable that after the second electromagnetic component 63 is powered on, it can generate an adsorption force. At this time, since the first electromagnetic component 3 is powered off, the magnetic component 4 is no longer subjected to the adsorption force of the first electromagnetic component 3 (or the adsorption force of the first electromagnetic component 3 on the magnetic component 4 is small), and the second electromagnetic component 63 adsorbs the magnetic component 4, making it easier for the magnetic component 4 to separate from the wiping head 22. After the magnetic component 4 separates from the wiping head 22, the old wiping cloth 5 on the wiping head 22 is no longer fixed by the first electromagnetic component 3 and the magnetic component 4, and the old wiping cloth 5 is in a free state, which makes it easy for the first suction cup to quickly and conveniently take the old wiping cloth 5. It can be seen that the provision of the second electromagnetic component 63 is conducive to taking the old wiping cloth 5, which can further improve the cloth replacement efficiency.

[0055] According to some embodiments of the present invention, Figure 5 As shown, a receiving box 64 is installed on the cloth changing bracket 6, and the new wiping cloth 5 is suitable for being placed in the receiving box 64, and the new cloth taking part 62 is movable between the cloth changing station and the receiving box 64. Among them, the wiping cloth 5 can be a dust-free cloth, etc., and multiple new wiping cloths 5 can be stacked and placed in the receiving box 64. Through the new cloth taking part 62, the new wiping cloth 5 in the receiving box 64 can be taken and moved to the cloth changing station, and the new wiping cloth 5 is placed on the wiping head 22 and released, and then the empty travel returns to the position of the receiving box 64, and the next travel can be repeated according to the above process. In this way, interference between the cloth changing action and the wiping action can be avoided, the continuity and reliability of the device action can be improved, and the efficiency of replacing new cloth can also be improved, and downtime can be reduced.

[0056] Alternatively, if Figure 5As shown, the cloth changing bracket 6 is provided with a material box lifting module 65, which is movable in the Z direction relative to the cloth changing bracket 6, and the accommodating box 64 is arranged on the material box lifting module 65 and moves with the material box lifting module 65. In this way, on the one hand, when the new cloth taking part 62 needs to take a new wiping cloth 5, the material box lifting module 65 can drive the accommodating box 64 to rise, which is convenient for the new cloth taking part 62 to take, and the cloth can be changed conveniently; on the other hand, when the new wiping cloth 5 in the accommodating box 64 is almost used up, the material box lifting module 65 can drive the accommodating box 64 to descend, so as to replenish the new wiping cloth 5 in the accommodating box 64, which can avoid the interference between the action of replenishing the new cloth and the action of taking the new cloth, and can improve reliability and safety.

[0057] According to some embodiments of the present invention, the screen wiping device may further include: a wiping information acquisition component, which is installed on the wiping head 22, and is connected to the controller of the screen wiping device. The controller obtains wiping information of the wiping head 22 through the wiping information acquisition component, and controls the operation of the screen wiping device according to the wiping information. Thus, the working state or parameters of the wiping head 22 can be obtained in real time through the wiping information acquisition component, which is conducive to rapid response.

[0058] Alternatively, if Figure 4 As shown, the wiping information acquisition component includes a pressure sensor 7, which is installed on the wiping head 22. The pressure sensor 7 is used to obtain the wiping force of the wiping head 22. A plurality of pressure sensors 7 can be provided to improve the accuracy of obtaining the wiping force.

[0059] Optionally, the wiping information acquisition component includes a cylinder and a proportional regulating valve, the cylinder is deformed as the wiping head 22 wiping, and the proportional regulating valve obtains the wiping force of the wiping head 22 through the deformation of the cylinder.

[0060] In this way, the wiping force of the wiping head 22 can be obtained in real time through the pressure sensor 7 or the combined cylinder proportional control valve. The controller can adjust the start and stop of the active module 1 and the extension and retraction of the wiping head 22 relative to the main body 21 according to the obtained wiping force, so as to quickly respond to and adjust the working state of the wiping head 22, thereby ensuring the wiping effect and effectively improving the product yield.

[0061] In some embodiments of the present invention, Figure 4 As shown, a sponge pad 51 is provided on the wiping head 22, and the wiping cloth 5 is covered on the sponge pad 51. The sponge pad 51 can buffer the collision force between the wiping head 22 and the screen 10 to prevent the wiping cloth 5 from being damaged, and can also increase the contact area between the wiping cloth 5 and the screen 10, which is conducive to wiping the slurry outside the pattern range of the screen 10 and the dry slurry blocked in the pattern of the screen 10, and is conducive to improving the wiping effect.

[0062] Optionally, the first electromagnetic component 3 is an electromagnet or an electromagnetic coil, that is, the first electromagnetic component 3 generates magnetic force when energized to attract the magnetic component 4 and firmly fix the wiping cloth 5 on the wiping head 22 to prevent the wiping cloth 5 from falling or misalignment, thereby improving the wiping effect.

[0063] Of course, it is understandable that the second electromagnetic member 63 on the old cloth taking member 61 can be the same as the first electromagnetic member 3, that is, the first electromagnetic member 3 is also an electromagnet or an electromagnetic coil. The function and effect of the second electromagnetic member 63 have been described in detail in the above description of the first electromagnetic member 3, so it will not be repeated here.

[0064] Optionally, the magnetic part 4 can be a permanent magnet. The permanent magnet has magnetism. By changing the magnetic pole of the first electromagnetic part 3, the attraction and repulsion between the first electromagnetic part 3 and the magnetic part 4 can be easily achieved. When the two are attracted to each other, the wiping cloth 5 can be firmly fixed on the iron part.

[0065] Alternatively, the magnetic part 4 can be an iron part. The iron part has the characteristic of being easily adsorbed by magnetic devices. When the first electromagnetic part 3 is energized to generate magnetic force, the iron part can be adsorbed by the first electromagnetic part 3, thereby firmly clamping the wiping cloth 5. As a result, the wiping cloth 5 is not easily displaced during wiping, the wiping effect is not easily affected, and the cost is low.

[0066] In some embodiments, the magnetic member 4 is annular, and when the first electromagnetic member 3 adsorbs the magnetic member 4 onto the wiping head 22, part of the wiping cloth 5 is located inside the magnetic member 4, and part of the wiping cloth 5 located inside the magnetic member 4 protrudes out of the magnetic member 4. In other words, when the first electromagnetic member 3 adsorbs the magnetic member 4 onto the wiping head 22, the wiping cloth 5 is in the form of a bulging convex bulge, which can not only prevent the wiping head 22 from having a hard collision with the screen 10, but also facilitates ensuring that the wiping work is in place and improves the wiping effect.

[0067] Optionally, the magnetic member 4 may be in the shape of a circular ring or a square ring; further, the magnetic member 4 may be in the shape of a closed ring or a ring with a gap. Of course, the magnetic member 4 is not limited to the shape described above. For those skilled in the art, the shape of the magnetic member 4 can be adaptively set according to factors such as demand and cost, and will not be described in detail here.

[0068] Other structures and operations of the screen wiping device according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

[0069] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that a specific feature, structure, material or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention.

Claims

1. A screen wiping device, characterized in that: include: Base; A movable module, the movable module is mounted on the base, the movable module can move relative to the base in the X direction, and the movable module can rotate relative to the base around the Z direction; A wiping assembly, which is mounted on the movable module and moves with the movable module, and is used for wiping the screen; a first electromagnetic member, wherein the first electromagnetic member is mounted on the wiping assembly; A magnetic member, wherein the magnetic member is arranged opposite to the first electromagnetic member, and when the first electromagnetic member is energized, the first electromagnetic member and the magnetic member are attracted to each other by magnetic force; A wiping cloth, wherein the wiping cloth is arranged in the wiping assembly and is located between the first electromagnetic component and the magnetic component; The wiping assembly comprises a body and a wiping head, and the wiping head is movable between a wiping station and a cloth changing station; The screen wiping device also includes: A cloth changing bracket, wherein the cloth changing bracket is provided with an old cloth taking piece and a new cloth taking piece, the old cloth taking piece is movable relative to the cloth changing bracket, and the new cloth taking piece is movable relative to the cloth changing bracket, Wherein, when the wiping head is located at the cloth changing station, the first electromagnetic component is powered off, the old cloth taking component removes the magnetic component and the old wiping cloth located on the wiping head, the new cloth taking component takes the new wiping cloth and places it on the wiping head, and then the old cloth taking component places the magnetic component on the new wiping cloth.

2. The screen wiping device according to claim 1, characterized in that: The wiping head is movable relative to the body to make the wiping assembly retractable, the wiping cloth is covered on the wiping head, and at the wiping station, the wiping head wipes the screen through the wiping cloth; at the cloth changing station, the wiping cloth on the wiping head is replaceable.

3. The screen wiping device according to claim 2, characterized in that: One of the body and the wiping head is provided with a telescopic track, and the other of the body and the wiping head is movable along the telescopic track.

4. The screen wiping device according to claim 3, characterized in that: The old cloth picking piece is a first suction cup, and the first suction cup is used to suck the old wiping cloth; the new cloth picking piece is a second suction cup, and the second suction cup is used to suck the new wiping cloth.

5. The screen wiping device according to claim 3, characterized in that: A second electromagnetic component is provided on the old cloth taking component. When the wiping head is located at the cloth changing position, the second electromagnetic component is energized, and the second electromagnetic component and the magnetic component are attracted to each other by magnetic force to take the magnetic component from the wiping head.

6. The screen wiping device according to claim 3, characterized in that: A containing box is installed on the cloth changing bracket, the new wiping cloth is suitable for being placed in the containing box, and the new cloth taking member is movable between the cloth changing station and the containing box.

7. The screen wiping device according to claim 6, characterized in that: The cloth changing bracket is provided with a material box lifting module, and the material box lifting module is movable in the Z direction relative to the cloth changing bracket. The accommodating box is arranged on the material box lifting module and moves with the material box lifting module.

8. The screen wiping device according to claim 2, characterized in that: Also includes: A wiping information acquisition component is installed on the wiping head, and the wiping information acquisition component is connected to a controller of the screen wiping device. The controller obtains wiping information of the wiping head through the wiping information acquisition component and controls the operation of the screen wiping device according to the wiping information.

9. The screen wiping device according to claim 8, characterized in that: The wiping information acquisition component includes a pressure sensor, which is installed on the wiping head and is used to obtain the wiping force of the wiping head.

10. The screen wiping device according to claim 8, characterized in that: The wiping information acquisition component includes a cylinder and a proportional regulating valve. The cylinder is deformed as the wiping head wips, and the proportional regulating valve obtains the wiping force of the wiping head through the deformation of the cylinder.

11. The screen wiping device according to claim 2, characterized in that: The wiping head is provided with a sponge pad, and the wiping cloth cover is arranged on the sponge pad.

12. The screen wiping device according to claim 2, characterized in that: The first electromagnetic component is an electromagnet or an electromagnetic coil, and the magnetic component is a permanent magnet or an iron component.

13. The screen wiping device according to claim 2, characterized in that: The magnetic member is annular in shape. When the first electromagnetic member adsorbs the magnetic member onto the wiping head, part of the wiping cloth is located in the magnetic member, and part of the wiping cloth located in the magnetic member protrudes out of the magnetic member.

14. The screen wiping device according to any one of claims 1 to 13, characterized in that: The activity module comprises: A movable module, the movable module is mounted on the base, and the movable module is movable in an X direction relative to the base; A rotating module, the rotating module is mounted on the moving module, and the rotating module is rotatable around the Z direction relative to the moving module; Wherein, the wiping assembly is installed on the rotating module.

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