Screen cleaning mechanism and printing equipment

Abstract

The utility model belongs to the technical field of silk-screen printing and provides a screen printing plate cleaning mechanism and printing equipment, the screen printing plate cleaning mechanism comprises a pushing assembly and a cleaning assembly, the pushing assembly comprises a feeding roller, a receiving roller and cleaning cloth, two ends of the cleaning cloth are respectively connected to the feeding roller and the receiving roller, one surface of the cleaning cloth is a wiping surface, and the other surface of the cleaning cloth is a cleaning surface. The cleaning assembly comprises a cleaning and scrubbing part abutting against the side, back to the wiping face, of the cleaning cloth, a negative pressure adsorption channel is formed in the cleaning and scrubbing part, an adsorption opening communicated with the negative pressure adsorption channel is formed in the surface of the cleaning and scrubbing part, and the adsorption opening faces the wiping area of the cleaning cloth. According to the screen printing plate cleaning mechanism, particle impurity adsorption can be synchronously carried out on the wiping area of the screen printing plate in the wiping process of the cleaning cloth, and therefore the cleaning effect of the screen printing plate is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of screen printing, and in particular relates to a screen cleaning mechanism and printing equipment. Background Art

[0002] After multiple printings, ink and other impurities will remain on the screen of the printing equipment. In order to ensure the printing effect of the pattern, the screen needs to be scrubbed. The existing screen cleaning mechanism generally wipes the screen through a cleaning roller and a cleaning cloth wrapped around the cleaning roller. The cleaning principle of this cleaning method is based on the displacement of the cleaning cloth relative to the screen to produce a wiping effect. In actual work, this simple wiping cleaning effect is limited, especially for some granular dust-like debris, which often cannot be wiped off well. Utility Model Content

[0003] In view of the above-mentioned defects or shortcomings, the utility model provides a screen cleaning mechanism, aiming to solve the technical problem that the existing screen cleaning mechanism has a poor wiping effect.

[0004] To achieve the above-mentioned purpose, the utility model provides a screen cleaning mechanism, which includes a pushing component and a cleaning component, the pushing component includes a feeding roller, a receiving roller and a cleaning cloth, the two ends of the cleaning cloth are respectively connected to the feeding roller and the receiving roller, one side of the cleaning cloth is a wiping surface, and the cleaning component includes a cleaning and scrubbing member abutting against the side of the cleaning cloth facing away from the wiping surface, a negative pressure adsorption channel is provided in the cleaning and scrubbing member, and an adsorption port of the negative pressure adsorption channel is provided on the surface of the cleaning and scrubbing member, and the adsorption port is arranged toward the wiping area of ​​the cleaning cloth.

[0005] In an embodiment of the present invention, the screen cleaning mechanism has a scrubbing posture, in which the screen and the cleaning scrubbing member are held against two sides of the wiping area of ​​the cleaning cloth; wherein, in the scrubbing posture, the suction port spans across the screen.

[0006] In an embodiment of the utility model, a wiping portion is provided on a side of the cleaning and scrubbing member abutting against the cleaning cloth, the wiping portion is arranged to abut against the cleaning cloth, and the adsorption port of the negative pressure adsorption channel is opened on the wiping portion.

[0007] In an embodiment of the utility model, the part of the wiping portion that abuts against the cleaning cloth forms an arc-shaped abutting surface. Along the pushing direction of the cleaning cloth, the middle part of the arc-shaped abutting surface is arched toward the cleaning cloth, the edge of the arc-shaped abutting surface is lower than the middle part of the arc-shaped abutting surface, and the suction port is opened on the arc-shaped abutting surface.

[0008] In an embodiment of the utility model, the cleaning component also includes a mounting seat, in which a negative pressure chamber and a cavity access port and a cavity access port connected to the negative pressure chamber are formed. The cleaning scrubbing component is installed on the mounting seat and the negative pressure adsorption channel is connected to the cavity access port.

[0009] In an embodiment of the utility model, a mounting groove is provided on the mounting seat, the cavity access port is arranged on the groove wall of the mounting groove, the cleaning scrubbing member is located in the mounting groove and the negative pressure adsorption channel is aligned with and connected to the cavity access port.

[0010] In an embodiment of the utility model, the screen cleaning mechanism further comprises a vacuum generator, and the vacuum generator is communicated with the cavity access port.

[0011] In an embodiment of the utility model, the screen cleaning mechanism further comprises a cleaning agent spraying assembly, and the cleaning agent spraying assembly comprises a cleaning agent nozzle; wherein, in the pushing direction of the cleaning cloth, the cleaning agent nozzle is arranged upstream of the cleaning scrubbing member.

[0012] In an embodiment of the utility model, the screen cleaning mechanism also includes a movable seat, a movable component is provided at the bottom of the movable seat, a pushing component and a cleaning component are arranged on the movable seat, and the cleaning agent spraying component also includes a fixed frame, the fixed frame and the movable seat are separately arranged, and the cleaning agent nozzle is arranged on the fixed frame.

[0013] In an embodiment of the present utility model, the cleaning agent spraying assembly further comprises a cleaning agent supply pipe and a flow control valve, the cleaning agent supply pipe is connected to the cleaning agent nozzle, and the flow control valve is arranged on the cleaning agent supply pipe.

[0014] In an embodiment of the utility model, the screen cleaning mechanism further comprises a tensioning roller, and the tensioning roller is arranged to abut against and push the cleaning cloth.

[0015] In order to achieve the above-mentioned object, the utility model further provides a printing device, wherein the printing device comprises the screen cleaning mechanism described above.

[0016] Through the above technical solution, the screen cleaning mechanism provided by the embodiment of the utility model has the following beneficial effects:

[0017] When the screen needs to be cleaned, first, it is necessary to ensure that the cleaning and scrubbing parts are aligned with the screen, and ensure that the surface of the area covered by the cleaning cloth on the cleaning and scrubbing parts is clean, and then control the screen or the screen cleaning mechanism to move so that the screen contacts the cleaning cloth on the cleaning and scrubbing parts and control the cleaning cloth to scrub the screen. The ink on the surface of the screen can be removed by the wiping action of the cleaning cloth, and during the wiping process of the cleaning cloth, the negative pressure generated by the adsorption port of the negative pressure adsorption channel can adsorb particulate impurities on the surface of the screen through the cleaning cloth, thereby ensuring the cleaning effect of particles and dust-like debris on the screen. In summary, the screen cleaning mechanism in the utility model can simultaneously adsorb particulate impurities in the wiping area of ​​the screen during the wiping process of the cleaning cloth, thereby ensuring the cleaning effect of the screen.

[0018] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the screen cleaning mechanism in the embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the overall structure of the screen cleaning mechanism after the cleaning cloth is taken out according to the embodiment of the utility model;

[0022] Figure 3 is a schematic diagram of the exploded structure of the cleaning component in the embodiment of the utility model;

[0023] Figure 4 is a schematic cross-sectional structural diagram of a cleaning component according to an embodiment of the utility model;

[0024] Figure 5 It is a schematic structural diagram of a cleaning and scrubbing member according to an embodiment of the utility model.

[0025] Description of Reference Numerals

[0026] 61 Pushing assembly 611 Cleaning cloth

[0027] 611a Wiping surface 612 Unloading roller

[0028] 613 receiving roller 62 cleaning component

[0029] 621 Cleaning and scrubbing part 622 Negative pressure adsorption channel

[0030] 622a suction port 623 wiping part

[0031] 623a arc-shaped abutment surface 624 mounting seat

[0032] 624a Negative pressure chamber 624b Chamber access port

[0033] 624c Cavity access port 624d Installation slot

[0034] 63 Detergent spray assembly 631 Detergent nozzle

[0035] 632 Fixing bracket 633 Flow control valve

[0036] 64 Mobile seat 641 Mobile assembly

[0037] 65 tension roller DETAILED DESCRIPTION

[0038] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0039] The screen cleaning mechanism of the present invention will be described below with reference to the accompanying drawings.

[0040] The utility model provides a screen cleaning mechanism, such as Figure 1 , Figure 2 and Figure 3 As shown, the screen cleaning mechanism includes:

[0041] The push assembly 61 includes a feeding roller 612, a receiving roller 613 and a cleaning cloth 611, wherein both ends of the cleaning cloth 611 are respectively connected to the feeding roller 612 and the receiving roller 613, and one side of the cleaning cloth 611 is a wiping surface 611a; and

[0042] The cleaning component 62 includes a cleaning scrubbing member 621 that abuts against the side of the cleaning cloth 611 facing away from the wiping surface 611a. The cleaning scrubbing member 621 is provided with a negative pressure adsorption channel 622. The adsorption port 622a of the negative pressure adsorption channel 622 is opened on the surface of the cleaning scrubbing member 621 and is arranged toward the wiping area of ​​the cleaning cloth 611.

[0043] The above-mentioned wiping area refers to the area where the cleaning and wiping member abuts against the cleaning cloth. The wiping area of ​​the cleaning cloth is used to wipe the screen. When the screen needs to be cleaned, it is first necessary to ensure that the cleaning and wiping member 621 is correctly aligned with the screen, and to ensure that the cleaning cloth 611 covers the area on the cleaning and wiping member 621. Then, the screen or the screen cleaning mechanism is controlled to move so that the screen contacts the cleaning cloth 611 on the cleaning and wiping member 621 and the cleaning cloth 611 is controlled to wipe the screen. The wiping action generated by the relative movement of the cleaning cloth 611 to the screen can remove the ink on the surface of the screen. During the wiping process of the cleaning cloth 611, the negative pressure generated by the adsorption port 622a of the negative pressure adsorption channel 622 can adsorb the particle impurities on the surface of the screen through the cleaning cloth 611, thereby removing the particles and dust-like debris on the screen. In summary, the screen cleaning mechanism in the utility model can simultaneously adsorb the particle impurities in the wiping area of ​​the screen during the wiping process of the cleaning cloth 611, thereby ensuring the cleaning effect of the screen.

[0044] like Figure 1 As shown, in an example of the utility model, a clean cleaning cloth 611 is rolled up on the unloading roller 612, and the receiving roller 613 is used to roll up the cleaning cloth 611 after wiping. By controlling the actions of the unloading roller 612 and the receiving roller 613, the clean cleaning cloth 611 can be pushed onto the cleaning scrubbing member 621 in sequence.

[0045] In the example of the present invention, the alignment adjustment between the cleaning and scrubbing member 621 and the screen and the wiping action of the cleaning cloth 611 can be achieved by controlling the overall movement of the screen cleaning mechanism relative to the screen, or by controlling the movement of the screen relative to the screen cleaning mechanism.

[0046] In the example of the utility model, the screen cleaning mechanism has a scrubbing posture. In the scrubbing posture, the screen and the cleaning scrubbing member 621 are against the two sides of the wiping area of ​​the cleaning cloth 611; wherein, in the scrubbing posture, the suction port 622a preferably crosses the screen. The cross direction of the suction port 622a is preferably the width direction of the screen, and the width direction is perpendicular to the relative displacement direction of the wiping action. By setting the suction port 622a across the screen and cooperating with the wiping action, the suction area of ​​the suction port 622a can completely cover the screen, thereby ensuring that the suction port 622a adsorbs the particle impurities in the entire area of ​​the screen, avoiding the existence of the suction blind area, and ensuring the cleaning effect.

[0047] like Figure 2 , Figure 3 and Figure 5 As shown, in the embodiment of the utility model, a protruding wiping portion 623 is provided on the side of the cleaning scrubbing member 621 that abuts against the cleaning cloth 611. The wiping portion 623 is used to abut against the cleaning cloth 611, and the adsorption port 622a of the negative pressure adsorption channel 622 is provided on the wiping portion 623. By providing the protruding wiping portion 623 on the side of the cleaning scrubbing member 621 that faces the cleaning cloth 611, the cleaning cloth 611 can be made to form a posture with a high middle and low ends in the wiping area. Since the four sides of the screen are fixed, the middle part of the screen will bulge outward and deform when the screen is subjected to the pushing and wiping force of the cleaning scrubbing member 621. By forming a posture with a high middle and low ends in the wiping area of ​​the cleaning cloth 611, the scrubbing effect on the deformed area of ​​the screen can be ensured, and the edge of the screen can be prevented from contacting and colliding with the edge of the cleaning scrubbing member 621. The adsorption port 622a of the negative pressure adsorption channel 622 is opened on the wiping portion 623, so that the adsorption port 622a can be closer to the wiping area, thereby ensuring the adsorption effect of the adsorption port 622a on the screen.

[0048] like Figure 2 , Figure 3 and Figure 5As shown, further, in an embodiment of the utility model, the portion of the wiping portion 623 that abuts against the cleaning cloth 611 forms an arcuate abutting surface 623a, the middle portion of the arcuate abutting surface is arched toward the cleaning cloth, the edge of the arcuate abutting surface is lower than the middle portion of the arcuate abutting surface, and the suction port 622a is opened on the arcuate abutting surface 623a. Specifically, the wiping portion 623 is annular and protrudes toward the cleaning cloth 611, and the middle part of the annular protrusion is surrounded to form a suction port 622a. The annular protrusion can be designed in a long strip shape to make it easier for the suction port 622a to cross the screen. The side of the annular protrusion facing the cleaning cloth 611 is an arc-shaped abutting surface, and the side of the arc-shaped abutting surface close to the suction port 622a is the middle part of the arc-shaped abutting surface. The middle part of the arc-shaped abutting surface is arched, and the area of ​​the arc-shaped abutting surface away from the suction port 622a is the edge of the arc-shaped abutting surface. The edge of the arc-shaped abutting surface is lower than the middle part of the arc-shaped abutting surface, and the arc-shaped abutting surface transitions from the middle arched area to the convenient area in a circular arc. When the screen cleaning mechanism is working, the cleaning cloth 611 will fit with the curved abutting surface and cover the suction port 622a. By setting a curved abutting surface 623a with a raised middle part, it can better fit with the deformed screen, thereby ensuring the scrubbing effect on the screen. The suction port 622a is opened on the curved abutting surface 623a, which can further increase the suction effect of the suction port 622a.

[0049] like Figure 3 and Figure 5 As shown, in the embodiment of the present utility model, the adsorption port 622a may be a strip groove or a groove of other shapes extending along the width direction of the cleaning cloth 611 , or may be an adsorption hole provided on the wiping portion 623 .

[0050] It should be noted that a negative pressure adsorption channel 622 is formed inside the cleaning and scrubbing member 621 , and the adsorption port 622 a serving as the opening of the negative pressure adsorption channel 622 is opened on the surface of the cleaning and scrubbing member 621 .

[0051] like Figure 3 and Figure 4 As shown, in the embodiment of the utility model, the cleaning component 62 also includes a mounting seat 624, a negative pressure cavity 624a is formed in the mounting seat 624, and the negative pressure cavity 624a has a cavity access port 624b and a cavity access port 624c, the cleaning scrubbing member 621 is mounted on the mounting seat 624, and the negative pressure adsorption channel 622 is docked with the cavity access port 624c. The cavity access port 624b is used to connect with an external negative pressure generating device, and the cavity access port 624c is used to connect with the negative pressure adsorption channel 622. Through the external negative pressure generating device, the cavity access port 624b, the negative pressure cavity 624a, the cavity access port 624c, and the negative pressure adsorption channel 622, a complete negative pressure adsorption passage can be formed.

[0052] like Figure 3 and Figure 4As shown, in the embodiment of the utility model, the mounting seat 624 is provided with a mounting groove 624d, the cavity connection port 624c is arranged on the groove wall of the mounting groove 624d, the cleaning and scrubbing member 621 is installed in the mounting groove 624d, and the negative pressure adsorption channel 622 is aligned with and communicated with the cavity connection port 624c. Specifically, the cavity connection port 624c can be installed on the groove bottom wall of the mounting groove 624d, and the negative pressure adsorption channel 622 runs through the cleaning and scrubbing member 621 from top to bottom. During assembly, the cleaning and scrubbing member 621 only needs to be correctly installed in the mounting groove 624d to automatically realize the connection between the negative pressure adsorption channel 622 and the cavity connection port 624c. Of course, the cavity access port 624c can also be set on the side wall of the installation slot 624d. At this time, the opening direction of the negative pressure adsorption channel 622 needs to be adjusted according to the position of the cavity access port 624c, or the cavity access port 624c and the negative pressure adsorption channel 622 can be connected through a detachable docking joint or a docking pipe.

[0053] In an embodiment of the present utility model, the external negative pressure generating device may be a vacuum generator, an air compressor, or the like.

[0054] like Figure 1 and Figure 2 As shown, in an embodiment of the utility model, the screen cleaning mechanism also includes a cleaning agent spraying assembly 63, the cleaning agent spraying assembly 63 includes a cleaning agent nozzle 631 arranged with the nozzle opening facing the wiping surface 611a of the cleaning cloth 611; wherein, in the pushing direction along the cleaning cloth 611, the cleaning agent nozzle 631 is arranged upstream of the cleaning scrubbing member 621. The pushing direction of the cleaning cloth 611 refers to the route direction of the cleaning cloth 611 moving from the feeding roller 612 to the receiving roller 613, with the cleaning scrubbing member 621 as the boundary. The cleaning cloth 611 in the upstream area is the clean area, and the downstream is the contaminated area after wiping. After the cleaning agent nozzle 631 sprays the cleaning agent on the clean area of ​​the cleaning cloth 611, the cleaning cloth 611 in the area sprayed with the cleaning agent can be moved to above the cleaning scrubbing member 621 by controlling the feeding roller 612 and the receiving roller 613 to rotate. At this time, the screen is controlled to move toward the cleaning scrubbing member 621, or the cleaning scrubbing member 621 is controlled to move toward the screen, so that the cleaning cloth 611 in the area sprayed with the cleaning agent can contact the screen, and then the screen cleaning mechanism is controlled to perform a scrubbing action to achieve cleaning of the screen. The arc-shaped wiping portion 623 in the cleaning and scrubbing member 621 can apply uniform and sufficient tension to the cleaning cloth 611, thereby ensuring the wiping force of the cleaning cloth 611. When the cleaning and scrubbing member 621 performs the wiping action, the external negative pressure generating device will work, thereby being able to synchronously adsorb particles and dust-like debris on the screen to ensure the cleaning effect of the screen.

[0055] like Figure 1 and Figure 2As shown, in an embodiment of the utility model, the screen cleaning mechanism also includes a moving seat 64, and a moving assembly 641 is provided at the bottom of the moving seat 64. The moving assembly 641 may include a horizontal displacement module and / or a lifting displacement module. The pushing assembly 61 and the cleaning assembly 62 are arranged on the moving seat 64, and the cleaning agent spraying assembly 63 also includes a fixed frame 632, and the fixed frame 632 is separated from the moving seat 64, and the cleaning agent nozzle 631 is arranged on the fixed frame 632. The screen cleaning mechanism in the utility model is mainly used in printing equipment, and the printing equipment is mainly composed of a screen assembly, a frame and other components. By setting the moving seat 64, the cleaning assembly 62 can be controlled to move to a specified position when the screen needs to be wiped, and can be moved away to avoid other components when the screen does not need to be wiped. At the same time, the setting of the moving seat 64 can facilitate the screen cleaning mechanism to realize the wiping action. The purpose of setting the cleaning agent spraying assembly 63 and the movable seat 64 separately is that in addition to the screen cleaning mechanism, the printing equipment also has many other components. If the cleaning agent spraying assembly 63 is installed on the movable seat 64, the cleaning agent nozzle 631 will need to move frequently with the screen cleaning mechanism, which will make it difficult to arrange the protective cover. At the same time, the cleaning agent nozzle 631 is likely to splash the cleaning agent onto other components when moving, causing other components to be contaminated and corroded by the cleaning agent. Therefore, it is preferred to fix the cleaning agent nozzle 631 on the frame of the printing equipment.

[0056] like Figure 1 and Figure 2 As shown, in the embodiment of the utility model, the cleaning agent spraying assembly 63 also includes a cleaning agent supply pipe and a flow control valve 633, the cleaning agent supply pipe is connected to the cleaning agent nozzle 631, and the flow control valve 633 is arranged on the cleaning agent supply pipe. The cleaning agent supply pipe is connected to an external supply pump, and the flow control valve 633 is used to control the flow rate and speed of the cleaning agent entering the nozzle.

[0057] like Figure 1 and Figure 2 As shown, in the embodiment of the present utility model, the screen cleaning mechanism further comprises a tensioning roller 65, and the tensioning roller 65 is arranged to abut and push the cleaning cloth 611. By arranging the tensioning roller 65, the tension of the cleaning cloth 611 can be adjusted.

[0058] To achieve the above purpose, the utility model also provides a printing device, wherein the printing device includes the screen cleaning mechanism described above. Since the printing device adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought by the above embodiments, which will not be repeated here.

[0059] In summary, the screen cleaning mechanism in the present invention can adsorb particles on the screen while wiping, thereby ensuring the cleaning effect of the screen, and by optimizing the structure of the cleaning scrubbing member 621, the cleaning scrubbing member 621 is high in the middle and low at both ends, and the raised portion in the middle of the cleaning scrubbing member 621 has a smooth transition from the arched position in the middle to the lower position at the edge, which can better wipe the screen and avoid contact between the screen and the edge of the cleaning scrubbing member 621. Furthermore, the raised portion in the middle of the cleaning scrubbing member 621 is set to an arc shape, which can ensure that the wiping force of the cleaning cloth 611 on the screen is consistent and uniform, so that the wiping effect is better.

[0060] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the embodiments of the present invention have been described above, it is understandable that the above embodiments are exemplary and cannot be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A screen cleaning mechanism, characterized in that: The screen cleaning mechanism comprises: A pushing assembly (61) comprises a feeding roller (612), a receiving roller (613) and a cleaning cloth (611), wherein two ends of the cleaning cloth (611) are respectively connected to the feeding roller (612) and the receiving roller (613), and one side of the cleaning cloth (611) is a wiping surface (611a); and The cleaning component (62) comprises a cleaning scrubbing member (621) abutting against the side of the cleaning cloth (611) facing away from the wiping surface (611a), a negative pressure adsorption channel (622) being provided inside the cleaning scrubbing member (621), a suction port (622a) connected to the negative pressure adsorption channel (622) being provided on the surface of the cleaning scrubbing member (621), and the suction port (622a) being arranged toward the wiping area of ​​the cleaning cloth (611).

2. The screen cleaning mechanism according to claim 1, characterized in that: The screen cleaning mechanism has a scrubbing posture, in which the screen and the cleaning scrubbing member (621) are pressed against two sides of the wiping area of ​​the cleaning cloth (611); Wherein, in the scrubbing posture, the suction port (622a) spans across the screen.

3. The screen cleaning mechanism according to claim 1, characterized in that: A wiping portion (623) is provided on one side of the cleaning scrubbing member (621) that abuts against the cleaning cloth (611); the wiping portion (623) is arranged to abut against the cleaning cloth (611); and the adsorption port (622a) of the negative pressure adsorption channel (622) is provided on the wiping portion (623).

4. The screen cleaning mechanism according to claim 3, characterized in that: The portion of the wiping portion (623) that abuts against the cleaning cloth (611) forms an arcuate abutting surface (623a), the middle portion of the arcuate abutting surface (623a) is arched toward the cleaning cloth (611), the edge of the arcuate abutting surface (623a) is lower than the middle portion of the arcuate abutting surface (623a), and the suction port (622a) is opened on the arcuate abutting surface (623a).

5. The screen cleaning mechanism according to claim 1, characterized in that: The cleaning component (62) also includes a mounting seat (624), wherein a negative pressure chamber (624a) and a chamber access port (624b) and a chamber access port (624c) connected to the negative pressure chamber (624a) are formed in the mounting seat (624), and the cleaning scrubbing member (621) is mounted on the mounting seat (624) and the negative pressure adsorption channel (622) is connected to the chamber access port (624c).

6. The screen cleaning mechanism according to claim 5, characterized in that: The mounting seat (624) is provided with a mounting groove (624d), the cavity access port (624c) is arranged on the groove wall of the mounting groove (624d), the cleaning and scrubbing member (621) is located in the mounting groove (624d), and the negative pressure adsorption channel (622) is aligned with and communicated with the cavity access port (624c).

7. The screen cleaning mechanism according to any one of claims 1 to 6, characterized in that: The screen cleaning mechanism further comprises a cleaning agent spraying assembly (63), wherein the cleaning agent spraying assembly (63) comprises a cleaning agent nozzle (631); Wherein, in the pushing direction of the cleaning cloth (611), the cleaning agent nozzle (631) is arranged upstream of the cleaning scrubbing member (621).

8. The screen cleaning mechanism according to claim 7, characterized in that: The screen cleaning mechanism further comprises a movable seat (64), a movable assembly (641) is provided at the bottom of the movable seat (64), the pushing assembly (61) and the cleaning assembly (62) are arranged on the movable seat (64), the cleaning agent spraying assembly (63) further comprises a fixed frame (632), the fixed frame (632) is arranged separately from the movable seat (64), and the cleaning agent nozzle (631) is arranged on the fixed frame (632).

9. The screen cleaning mechanism according to any one of claims 1 to 6, characterized in that: The screen cleaning mechanism also includes a tensioning roller (65), and the tensioning roller (65) is arranged to abut against and push the cleaning cloth (611).

10. A printing device, characterized in that: The printing device comprises a screen cleaning mechanism according to any one of claims 1 to 9.

Images