Squeegee assembly and screen printing device

Abstract

This application discloses a scraper assembly, including a scraper holder, a roller, a scraper, a first adjusting gear, a second adjusting gear, and a locking assembly. The roller is rotatably mounted on the scraper holder and has a scraper mounting groove. The scraper is mounted in the scraper mounting groove. The first adjusting gear is located on one side of the roller, and the second adjusting gear is rotatably mounted on one side of the scraper holder, meshing with the first adjusting gear. The locking assembly is located on the side of the scraper holder where the second adjusting gear is located. When the locking assembly is in a locked state, it locks the second adjusting gear to maintain the angle of the scraper. When the locking assembly is in a released state, it releases the second adjusting gear to adjust the angle of the scraper. Compared to existing technologies, this scraper assembly allows for adjustment of different scraper angles to adapt to different wet weight control requirements, thereby achieving the technical effect of reducing consumable costs.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module technology, and more specifically to a scraper assembly and screen printing apparatus. Background Technology

[0002] Currently, the manufacturing process of solar cells can generally be divided into cleaning, PEVCD, PVD and screen printing. The screen printing process generally uses a screen, squeegee, paste and other materials to print patterns on the solar cells. That is, the squeegee is used to generate pressure to squeeze the paste, and the paste is evenly penetrated into the surface of the solar cell under pressure to produce patterns.

[0003] In the screen printing process, wet weight (i.e., the weight of the sintered paste after printing) is a core process parameter. Its precise control directly affects the final performance of solar cells and the overall production yield. Since the squeegee angle can affect the wet weight by influencing the paste feeding force and the slicking state of the paste, different squeegee angles can generally be used to accurately control the wet weight. However, the existing squeegee assembly and squeegee holder structure design makes the angle of the squeegee mounted on the squeegee holder fixed. This means that when selecting different squeegee angles according to different wet weight requirements, multiple squeegee assemblies with different angles can only be used, resulting in high material costs. Utility Model Content

[0004] This application provides a scraper assembly that allows a single scraper assembly to adjust different scraper angles to adapt to different wet weight control requirements, thereby reducing consumable costs.

[0005] In a first aspect, embodiments of this application provide a scraper assembly, including a scraper holder, a roller, a scraper, a first adjusting gear, a second adjusting gear, and a locking assembly. The roller is rotatably mounted on the scraper holder, and a scraper mounting groove is provided on the roller. The scraper is disposed in the scraper mounting groove. The first adjusting gear is disposed on one side of the roller, and the second adjusting gear is rotatably disposed on one side of the scraper holder, meshing with the first adjusting gear. The locking assembly is disposed on the side of the scraper holder where the second adjusting gear is disposed. When the locking assembly is in a locked state, it locks the second adjusting gear to maintain the angle of the scraper; when the locking assembly is in a released state, it releases the second adjusting gear to adjust the angle of the scraper.

[0006] In the above technical solution, the adjustment and maintenance of the scraper angle are achieved through the cooperation of the roller, the first adjusting gear, the second adjusting gear and the locking component. This allows a single scraper assembly to adjust different scraper angles to adapt to different wet weight control requirements, thereby achieving the technical effect of reducing consumable costs.

[0007] In some embodiments, the locking assembly includes a locking screw and a locking threaded hole disposed on one side of the scraper holder. One end of the locking screw engages with the locking threaded hole, and the other end of the locking screw is provided with a locking block. When the locking assembly is in the locked state, the locking screw is screwed into the locking threaded hole to make the locking block abut against the second adjusting gear. When the locking assembly is in the released state, the locking screw is screwed out of the locking threaded hole to make the locking block disengage from the second adjusting gear.

[0008] In the above technical solution, the locking block, locking screw and locking threaded hole cooperate with each other to achieve rapid switching between the locking and releasing states of the locking assembly, thereby achieving rapid adjustment of the scraper angle.

[0009] In some embodiments, the locking assembly includes a locking rod, a first locking hole disposed on the second adjusting gear, and a second locking hole disposed on the scraper holder and corresponding to the first locking hole. When the locking assembly is in a locked state, the locking rod is sequentially inserted into the first locking hole and the second locking hole; when the locking assembly is in a released state, the locking rod is withdrawn from the second locking hole.

[0010] In the above technical solution, the locking rod, the first locking hole and the second locking hole cooperate with each other to achieve rapid switching between the locking state and the release state of the locking assembly, thereby realizing rapid adjustment of the scraper angle.

[0011] In some embodiments, along the axial direction of the roller, the roller is provided with a plurality of first threaded holes, and a plurality of first screws are respectively provided in the plurality of first threaded holes. The scraper is provided with a plurality of second threaded holes, and the plurality of second threaded holes correspond one-to-one with the plurality of first threaded holes.

[0012] In the above technical solution, by setting a number of first threaded holes on the roller, and setting a first screw in each of the first threaded holes, and setting a number of second threaded holes on the scraper accordingly, since the screw and the threaded hole are threadedly engaged, the scraper and the roller can be fixed when the first screw is screwed into the first threaded hole and the second threaded hole in sequence. At the same time, the scraper can be fixed at multiple points by the cooperation of multiple screws and multiple threaded holes, making the scraper installation more secure.

[0013] In some embodiments, a first rotating shaft is provided at each end of the roller, and the roller is rotatably mounted on the scraper holder via the first rotating shaft. A first bearing is also provided at the connection position between the first rotating shaft and the scraper holder.

[0014] In the above technical solution, by setting a transmission structure consisting of a first rotating shaft and a first bearing, the rolling friction of the bearing reduces the coefficient of friction between the roller and the scraper holder, thereby making the rotation between the roller and the scraper holder more efficient and stable.

[0015] In some embodiments, the second adjusting gear is provided with a scale pointer, and the scraper holder is provided with an angle scale line that cooperates with the scale pointer.

[0016] In the above technical solution, the combination of the scale pointer and the angle scale line makes it easy to observe and adjust the angle of the scraper.

[0017] In some embodiments, the adjustment angle of the scraper is α, which satisfies 20°≤α≤80°.

[0018] In the above technical solution, by setting 20°≤a≤80°, the adjustment angle range of the squeegee is controlled within a small range, so that the offset range of the central axis of the adjusted squeegee relative to the central axis of the squeegee holder is not too large, thereby preventing the external force on the squeegee during the printing process from being too large and improving the service life of the squeegee.

[0019] In some embodiments, the length of the scraper holder is L, which satisfies 100mm≤L≤1000mm.

[0020] In the above technical solution, by setting 100mm≤L≤1000mm, the length of the squeegee holder can be adaptively adjusted according to the installation table size of different screen printing devices, thereby meeting different installation requirements.

[0021] In some embodiments, the diameter of the roller is D1, and the diameter of the first adjusting gear is D2, satisfying that D2 < D1.

[0022] In the above technical solution, by setting D2 < D1, the outer edge of the first adjusting gear will not protrude beyond the outer edge of the drum, thereby reducing the interference of the first adjusting gear on the assembly of the scraper when the scraper is installed on the drum.

[0023] Secondly, embodiments of this application provide a screen printing apparatus, including the squeegee assembly provided in any one of the embodiments of the first aspect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a scraper assembly provided in some embodiments of this application;

[0026] Figure 2 This is a schematic diagram of the scraper assembly provided in other embodiments of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the roller in the scraper assembly provided in some embodiments of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the roller in a scraper assembly provided in other embodiments of this application;

[0029] Figure 5 A schematic diagram of the scraper assembly provided in some embodiments of this application (showing scale pointers and angle scale lines);

[0030] Figure 6 This is a schematic diagram of the structure of a scraper assembly provided in some embodiments of this application;

[0031] Figure 7 This is a schematic diagram of the structure of the roller in a scraper assembly provided in some embodiments of this application.

[0032] icon:

[0033] 10-Scraper holder, 11-Angle scale line, 20-Scraper, 30-Roller, 31-Scraper mounting groove, 32-First threaded hole, 33-First screw, 34-First rotating shaft, 40-First adjusting gear, 50-Second adjusting gear, 51-Scale pointer, 60-Locking assembly, 61-Locking block, 62-Locking screw, 63-Locking threaded hole, 64-Locking rod, 65-First locking hole, 70-First bearing. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0036] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0040] Currently, the manufacturing process of solar cells can generally be divided into cleaning, PEVCD, PVD and screen printing. The screen printing process generally uses a screen, squeegee, paste and other materials to print patterns on the solar cells. That is, the squeegee is used to generate pressure to squeeze the paste, and the paste is evenly penetrated into the surface of the solar cell under pressure to produce patterns.

[0041] In the screen printing process, wet weight (i.e., the weight of the sintered paste after printing) is a core process parameter. Its precise control directly affects the final performance of solar cells and the overall production yield. Since the squeegee angle can affect the wet weight by influencing the paste feeding force and the slicking state of the paste, different squeegee angles can generally be used to accurately control the wet weight. However, the existing squeegee assembly and squeegee holder structure design makes the angle of the squeegee mounted on the squeegee holder fixed. This means that when selecting different squeegee angles according to different wet weight requirements, multiple squeegee assemblies with different angles can only be used, resulting in high material costs.

[0042] Based on the above considerations, in order to solve the technical problem that only multiple different angle scraper assemblies can be used when selecting different angle scrapers according to different wet weight requirements, resulting in high consumable costs, this application provides a scraper assembly, including a scraper holder, a roller, a scraper, a first adjusting gear, a second adjusting gear, and a locking assembly. The roller is rotatably mounted on the scraper holder, and the roller is provided with a scraper mounting groove. The scraper is disposed in the scraper mounting groove. The first adjusting gear is disposed on one side of the roller, and the second adjusting gear is rotatably disposed on one side of the scraper holder, meshing with the first adjusting gear. The locking assembly is disposed on the side of the scraper holder where the second adjusting gear is disposed. When the locking assembly is in the locked state, the locking assembly locks the second adjusting gear to maintain the angle of the scraper; when the locking assembly is in the released state, the locking assembly releases the second adjusting gear to adjust the angle of the scraper.

[0043] In this scraper assembly, a rotatable roller is first mounted on the scraper holder, and the scraper is positioned within a scraper mounting groove on the roller. A first adjusting gear and a second adjusting gear, meshing with each other, are respectively mounted on the roller and the scraper holder. A locking component locks or releases the second adjusting gear. When the scraper angle needs adjustment, the locking component is released, causing the second adjusting gear to rotate relative to the scraper holder. This rotation of the second adjusting gear drives the roller, which houses the first adjusting gear, to rotate relative to the scraper holder. Thus, the scraper angle is adjusted through the rotation of the roller. Adjustment; After the scraper angle is adjusted, the locking component can be locked. At this time, the locking component locks the second adjusting gear, fixing the second adjusting gear relative to the scraper holder. The second adjusting gear cannot drive the roller with the first adjusting gear to rotate relative to the scraper holder. Thus, the scraper angle is maintained by the stationary position of the roller. In summary, the adjustment and maintenance of the scraper angle are achieved through the cooperation of the roller, the first adjusting gear, the second adjusting gear, and the locking component. This allows a single scraper assembly to adjust different scraper angles to adapt to different wet weight control requirements, thereby achieving the technical effect of reducing consumable costs.

[0044] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a scraper assembly provided in some embodiments of this application. Embodiments of this application provide a scraper assembly including a scraper holder 10, a roller 30, a scraper 20, a first adjusting gear 40, a second adjusting gear 50, and a locking assembly 60. The roller 30 is rotatably mounted on the scraper holder 10, and a scraper mounting groove 31 is provided on the roller 30. The scraper 20 is disposed within the scraper mounting groove 31. The first adjusting gear 40 is disposed on one side of the roller 30, and the second adjusting gear 50 is rotatably mounted on one side of the scraper holder 10, meshing with the first adjusting gear 40. The locking assembly 60 is disposed on the side of the scraper holder 10 where the second adjusting gear 50 is located. When the locking assembly 60 is in a locked state, it locks the second adjusting gear 50 to maintain the angle of the scraper 20; when the locking assembly 60 is in a released state, it releases the second adjusting gear 50 to adjust the angle of the scraper 20.

[0045] The roller 30 is rotatably mounted on the scraper holder 10. The scraper holder 10 has first mounting plates at both ends on the side facing the roller 30. The two first mounting plates have first mounting holes respectively. The roller 30 has first support columns at both ends that rotatably cooperate with the first mounting holes.

[0046] The scraper 20 is disposed in the scraper mounting groove 31. The scraper 20 and the scraper mounting groove 31 can be fixedly connected, for example, the scraper 20 and the scraper mounting groove 31 can be fixedly connected by riveting with rivets and rivet holes. Alternatively, the scraper 20 and the scraper mounting groove 31 can be detachably connected, for example, the scraper 20 and the scraper mounting groove 31 can be detachably connected by snap-fit ​​with buckles and slots.

[0047] The number of teeth of the first adjusting gear 40 and the second adjusting gear 50 can be adjusted according to the rotation amplitude of the second adjusting gear 50 when adjusting the angle. For example, the first adjusting gear 40 has 15 teeth and the second adjusting gear 50 has 15 teeth.

[0048] The first adjusting gear 40 is disposed on one side of the roller 30. The first adjusting gear 40 and the roller 30 can be fixedly connected, for example, the first adjusting gear 40 and the roller 30 can be fixedly connected by riveting with rivets and rivet holes. Alternatively, the first adjusting gear 40 and the roller 30 can be detachably connected, for example, the first adjusting gear 40 and the roller 30 can be fixedly connected by snap-fit ​​and snap-slot or by threaded connection with screw and threaded hole.

[0049] The engagement of the first adjusting gear 40 and the second adjusting gear 50 can be either a direct engagement through the teeth on the gears, or an indirect engagement through a chain.

[0050] In this embodiment, a rotatable roller 30 is first installed on the scraper holder 10, and the scraper 20 is installed in the scraper mounting groove 31 of the roller 30. Next, a first adjusting gear 40 and a second adjusting gear 50, which mesh with each other, are respectively installed on the roller 30 and the scraper holder 10. A locking component 60 is provided to lock or release the second adjusting gear 50. When it is necessary to adjust the angle of the scraper 20, the locking component 60 can be released, causing the second adjusting gear 50 to rotate relative to the scraper holder 10. The rotation of the second adjusting gear 50 drives the roller 30, on which the first adjusting gear 40 is installed, to rotate relative to the scraper holder 10. Thus, the rotation of the roller 30 achieves the rotation of the scraper 20. Angle adjustment: After the scraper 20 angle is adjusted, the locking component 60 can be locked. At this time, the locking component 60 locks the second adjusting gear 50, making the second adjusting gear 50 fixed relative to the scraper holder 10. The second adjusting gear 50 cannot drive the roller 30, which is equipped with the first adjusting gear 40, to rotate relative to the scraper holder 10. Thus, the angle of the scraper 20 is maintained by the stationary position of the roller 30. In summary, the adjustment and maintenance of the scraper 20 angle are achieved through the cooperation of the roller 30, the first adjusting gear 40, the second adjusting gear 50, and the locking component 60. This allows a single scraper assembly to adjust different scraper 20 angles to adapt to different wet weight control requirements, thereby achieving the technical effect of reducing consumable costs.

[0051] In some embodiments, please refer to Figure 1 The locking assembly 60 includes a locking screw 62 and a locking threaded hole 63 disposed on one side of the scraper holder 10. One end of the locking screw 62 engages with the locking threaded hole 63, and the other end of the locking screw 62 is provided with a locking block 61. When the locking assembly 60 is in the locked state, the locking screw 62 is screwed into the locking threaded hole 63 so that the locking block 61 abuts against the second adjusting gear 50. When the locking assembly 60 is in the released state, the locking screw 62 is screwed out of the locking threaded hole 63 so that the locking block 61 disengages from the second adjusting gear 50.

[0052] In this embodiment, the locking assembly 60 includes a locking block 61, a locking screw 62, and a locking threaded hole 63. Since the locking screw 62 is threaded into the locking threaded hole 63, when the locking screw 62 is screwed into the locking threaded hole 63, the locking screw 62 can drive the locking block 61 to move towards the second adjusting gear 50, causing the locking block 61 to abut against the second adjusting gear 50, thereby limiting the rotation of the second adjusting gear 50 and placing the locking assembly 60 in a locked state. When the locking screw 62 is... When the locking threaded hole 63 is unscrewed, the locking screw 62 can drive the locking block 61 to move away from the second adjusting gear 50, disengaging the locking block 61 from the second adjusting gear 50. This allows the second adjusting gear 50 to rotate relative to the scraper holder 10, putting the locking assembly 60 in a released state. In summary, the cooperation between the locking block 61, the locking screw 62, and the locking threaded hole 63 enables the rapid switching between the locking and released states of the locking assembly 60, thereby achieving rapid adjustment of the scraper 20 angle.

[0053] In some embodiments, please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a scraper assembly provided in other embodiments of this application. The locking assembly 60 includes a locking rod 64, a first locking hole 65 disposed on the second adjusting gear 50, and a second locking hole disposed on the scraper holder 10 and corresponding to the first locking hole 65. Figure 2 (Not shown in the image), wherein, when the locking assembly 60 is in the locked state, the locking rod 64 is sequentially inserted into the first locking hole 65 and the second locking hole (not shown in the image), Figure 2 (Not shown in the image); when the locking assembly 60 is in the released state, the locking rod 64 retracts from the second locking hole (…). Figure 2 (Not shown in the image).

[0054] Locking rod 64 can be a smooth rod or a screw. First locking hole 65 and second locking hole ( Figure 2 (Not shown in the image) can all be open holes or all be threaded holes.

[0055] The locking rod 64 is a smooth rod, the first locking hole 65 is a second locking hole ( Figure 2 In embodiments where all holes (not shown) are light holes, when the locking assembly 60 is in the locked state, the locking rod 64 is sequentially inserted into the first locking hole 65 and the second locking hole (not shown). Figure 2 (Not shown in the image); when the locking assembly 60 is in the released state, the locking lever 64 is pulled out of the second locking hole (…). Figure 2 (Not shown in the image).

[0056] The locking rod 64 is a screw, the first locking hole 65 is a second locking hole ( Figure 2In embodiments where all holes (not shown) are threaded holes, when the locking assembly 60 is in the locked state, the locking rod 64 is screwed into the first locking hole 65 and the second locking hole (not shown). Figure 2 (not shown); when the locking assembly 60 is in the released state, the locking rod 64 protrudes from the second locking hole ( Figure 2 (Not shown in the image).

[0057] In this embodiment, the locking assembly 60 includes a locking rod 64, a first locking hole 65, and a second locking hole. Figure 2 (not shown in the image), because the locking rod 64 is respectively connected to the first locking hole 65 and the second locking hole ( Figure 2 (Not shown in the image) This allows the locking rod 64 to be sequentially inserted into the first locking hole 65 and the second locking hole (not shown in the image). Figure 2 When the locking lever 64 is not shown in the diagram, it can limit the rotation of the second adjusting gear 50, thus locking the locking assembly 60 in a locked state; when the locking lever 64 is withdrawn from the second locking hole (not shown in the diagram), it can limit the rotation of the second adjusting gear 50, thus locking the locking assembly 60 in a locked state; Figure 2 When (not shown in the image), the locking rod 64 cannot restrict the rotation of the second adjusting gear 50, thereby allowing the second adjusting gear 50 to rotate relative to the scraper holder 10, thus releasing the locking assembly 60. In summary, through the locking rod 64, the first locking hole 65, and the second locking hole (…),… Figure 2 The interaction between the locking components 60 (not shown in the figure) enables rapid switching between the locked and released states, thereby enabling rapid adjustment of the scraper 20 angle.

[0058] In some embodiments, please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of the roller in the scraper assembly provided in some embodiments of this application. Along the axial direction of the roller 30, the roller 30 is provided with a plurality of first threaded holes 32, and a plurality of first screws 33 are respectively disposed within the plurality of first threaded holes 32. The scraper 20 is provided with a plurality of second threaded holes (…). Figure 3 (not shown in the image), several second threaded holes ( Figure 3 (Not shown in the image) corresponds one-to-one with several of the first threaded holes 32.

[0059] In this embodiment, a plurality of first threaded holes 32 are provided on the roller 30, and a first screw 33 is respectively provided in the plurality of first threaded holes 32. A plurality of second threaded holes are correspondingly provided on the scraper 20. Figure 3 (Not shown in the image), because the screw is threaded into the threaded hole, the first screw 33 is screwed into the first threaded hole 32 and the second threaded hole in sequence. Figure 3 When (not shown in the image), the scraper 20 and the roller 30 can be fixed. At the same time, multiple screws and multiple threaded holes are used to fix the scraper 20 at multiple points, making the scraper 20 more securely installed.

[0060] In some embodiments, please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the roller in a scraper assembly provided in some other embodiments of this application. The roller 30 has a first rotating shaft 34 at each end, and the roller 30 is rotatably mounted on the scraper holder 10 via the first rotating shaft 34. A first bearing 70 is also provided at the connection point between the first rotating shaft 34 and the scraper holder 10.

[0061] In this embodiment, by setting up a transmission structure consisting of a first rotating shaft 34 and a first bearing 70, the rolling friction of the bearing reduces the coefficient of friction between the roller 30 and the scraper holder 10, thereby making the rotation between the roller 30 and the scraper holder 10 more efficient and stable.

[0062] In some embodiments, please refer to Figure 5 , Figure 5 This is a schematic diagram of the scraper assembly provided in some embodiments of this application (showing a scale pointer and angle scale lines). The second adjusting gear 50 is provided with a scale pointer 51, and the scraper holder 10 is provided with angle scale lines 11 that cooperate with the scale pointer 51.

[0063] In this embodiment, the angle of the scraper 20 can be easily observed and adjusted by the cooperation of the scale pointer 51 and the angle scale line 11.

[0064] In some embodiments, the adjustment angle of the scraper 20 is a, satisfying 20°≤a≤80°.

[0065] 'a' can be a point value of any one of 20°, 23°, 26°, 30°, 33°, 36°, 40°, 43°, 46°, 50°, 53°, 56°, 60°, 63°, 66°, 70°, 73°, 76°, or 80°, or a range between any two.

[0066] In this embodiment, by setting 20°≤a≤80°, the adjustment angle range of the squeegee 20 is controlled within a small range, so that the offset range of the central axis of the adjusted squeegee 20 relative to the central axis of the squeegee holder 10 is not too large, thereby preventing the external force on the squeegee 20 during the printing process from being too large and improving the service life of the squeegee 20.

[0067] In some embodiments, please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of a scraper assembly provided in some embodiments of this application. The length of the scraper holder 10 is L, which satisfies 100mm≤L≤1000mm.

[0068] L can be a point value of any one of the following: 100mm, 145mm, 190mm, 200mm, 245mm, 290mm, 300mm, 345mm, 390mm, 400mm, 445mm, 490mm, 500mm, 545mm, 590mm, 600mm, 645mm, 690mm, 700mm, 745mm, 790mm, 800mm, 845mm, 890mm, 900mm, 945mm, 990mm, 1000mm, or a range between any two.

[0069] In this embodiment, by setting 100mm≤L≤1000mm, the length of the squeegee holder 10 can be adaptively adjusted according to the installation platform size of different screen printing devices, thereby meeting different installation requirements.

[0070] In some embodiments, please refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of the roller in a scraper assembly provided in some embodiments of this application. The diameter of the roller 30 is D1, and the diameter of the first adjusting gear 40 is D2, satisfying D2 < D1.

[0071] In this embodiment, by setting D2 < D1, the outer edge of the first adjusting gear 40 will not protrude beyond the outer edge of the roller 30, thereby reducing the assembly interference of the first adjusting gear 40 on the scraper 20 when the scraper 20 is installed on the roller 30.

[0072] In some embodiments, the second adjusting gear 50 may also be provided with a rocker arm to facilitate rotation of the second adjusting gear 50.

[0073] This application provides a screen printing apparatus, including the squeegee assembly provided in any of the above embodiments.

[0074] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0075] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A doctor blade assembly characterized by, include: Scraper holder; A roller is rotatably mounted on the scraper holder, and the roller is provided with a scraper mounting groove; A scraper, wherein the scraper is disposed within the scraper mounting groove; A first adjusting gear is disposed on one side of the roller; The second adjusting gear is rotatably disposed on one side of the scraper holder, and the second adjusting gear meshes with the first adjusting gear; A locking assembly is disposed on the side of the scraper holder where the second adjusting gear is disposed; Specifically, when the locking component is in the locked state, it locks the second adjusting gear to maintain the angle of the scraper; when the locking component is in the released state, it releases the second adjusting gear to adjust the angle of the scraper.

2. The scraper assembly as described in claim 1, characterized in that, The locking assembly includes a locking screw and a locking threaded hole disposed on one side of the scraper holder. One end of the locking screw engages with the locking threaded hole, and the other end of the locking screw is provided with a locking block. When the locking assembly is in the locked state, the locking screw is screwed into the locking threaded hole to make the locking block abut against the second adjusting gear. When the locking assembly is in the released state, the locking screw is screwed out of the locking threaded hole to make the locking block disengage from the second adjusting gear.

3. The scraper assembly as described in claim 1, characterized in that, The locking assembly includes a locking rod, a first locking hole disposed on the second adjusting gear, and a second locking hole disposed on the scraper holder and corresponding to the first locking hole. When the locking assembly is in the locked state, the locking rod is sequentially inserted into the first locking hole and the second locking hole; when the locking assembly is in the released state, the locking rod is withdrawn from the second locking hole.

4. The scraper assembly as claimed in claim 1, characterized in that, Along the axial direction of the roller, the roller is provided with a plurality of first threaded holes, and a plurality of first screws are respectively provided in the plurality of first threaded holes. The scraper is provided with a plurality of second threaded holes, and the plurality of second threaded holes correspond one-to-one with the plurality of first threaded holes.

5. The scraper assembly as claimed in claim 1, characterized in that, The roller is provided with a first rotating shaft at each end, and the roller is rotatably mounted on the scraper holder via the first rotating shaft. A first bearing is also provided at the connection position between the first rotating shaft and the scraper holder.

6. The scraper assembly as claimed in claim 1, characterized in that, The second adjusting gear is provided with a scale pointer, and the scraper holder is provided with an angle scale line that cooperates with the scale pointer.

7. The scraper assembly as described in any one of claims 1-6, characterized in that, The adjustment angle of the scraper is 'a', which satisfies 20°≤a≤80°.

8. The scraper assembly as described in any one of claims 1-6, characterized in that, The length of the scraper holder is L, which satisfies 100mm≤L≤1000mm.

9. The scraper assembly according to any one of claims 1-6, characterized in that, The diameter of the roller is D1, and the diameter of the first adjusting gear is D2, satisfying that D2 < D1.

10. A screen printing apparatus, characterized in that, Includes the scraper assembly as described in any one of claims 1-9.

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