Paper feeding mechanism capable of preventing paper from curling, printer and paper feeding method

Abstract

The invention belongs to the technical field of paper conveying, and provides a paper conveying mechanism capable of preventing paper from curling, a printer and a paper conveying method.The paper conveying mechanism capable of preventing paper from curling, the printer and the paper conveying method.According to the paper conveying mechanism capable of preventing paper from curling, the printer and the paper conveying method, paper forms an inverted-arch-shaped structure with the middle low and the two sides high through protruding ribs; the middle part is slightly lower, so that the contact area between the paper and the conveying table surface can be reduced, the friction force is reduced, the structural rigidity of the paper in the conveying process can be obviously enhanced, the bending and curling risks are resisted, the technical problem that printing paper with large ink amount is easy to bend and curl in the prior art is effectively solved, and the product quality is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of paper conveying technology, specifically relating to a paper feeding mechanism, printer, and paper feeding method that prevents paper curling. Background Technology

[0002] The paper feeding mechanism of a digital printer is the core component that enables automatic paper delivery and ensures continuous printing. Its operational stability directly affects printing efficiency and quality. Current digital printer paper feeding mechanisms typically include components such as conveyor rollers and conveyor belts. During operation, the rotation of the conveyor rollers and conveyor belts provides driving force, moving the paper along a preset direction in the conveying channel to complete actions such as paper feeding.

[0003] However, in practical applications, the existing paper feeding mechanisms have significant technical defects: because the conveying channels of the paper feeding mechanisms are mostly planar structures, they do not provide effective constraints or guiding supports for both sides of the paper, causing the paper to be subjected to force in a planar state during conveying. Paper itself has a certain degree of flexibility and relatively limited rigidity, especially paper printed with large amounts of ink, which has high moisture content and severe deformation, resulting in significant friction between the paper and the conveying components. This makes it extremely prone to irregular bending and curling during conveying.

[0004] Currently, there is no effective solution in the existing technology to address the problem of paper bending in the aforementioned paper feeding mechanism. Therefore, there is an urgent need for an improved paper feeding mechanism to prevent paper from bending during transport and to ensure the stable operation of the digital printer and product quality. Summary of the Invention

[0005] This invention provides a paper feeding mechanism, printer, and paper feeding method to prevent paper curling, aiming to solve the technical problem that paper with large ink volume is prone to bending and curling during the feeding process.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, embodiments of the present invention provide a paper feeding mechanism to prevent paper curling, suitable for being disposed between a printing mechanism and a paper receiving mechanism, the paper feeding mechanism comprising: A conveying assembly, having a conveying surface for conveying paper; and The ribs are positioned on both sides of the conveying surface along the paper conveying direction. The ribs have an upward lifting force on the two sides of the paper during the conveying process, so that the paper forms an inverted arch structure with a low middle and high sides during the conveying process.

[0007] In conjunction with the first aspect, in one possible implementation of the anti-paper curling paper feeding mechanism provided by the present invention, the conveying assembly includes a first conveying assembly and a second conveying assembly arranged sequentially along the paper conveying direction; A first rib is provided at the end of the first conveying component, and the first rib is provided on both sides of the paper conveying path. The second conveying assembly is provided with a second protruding rib; The first rib has a smooth slope along the paper transport direction, and the slope height is 0.5cm-1.5cm; the second rib is rod-shaped and protrudes 0.5cm-1.5cm above the transport surface.

[0008] In conjunction with the first aspect, in one possible implementation of the anti-paper curling paper feeding mechanism provided by the present invention, the height of the feeding surface of the second feeding component is lower than that of the feeding surface of the first feeding component; A pair of guide plates connected to the first conveying component are also provided on the conveying surface of the second conveying component. The guide plates are symmetrically arranged on both sides of the paper conveying path, and a guide inclined surface is provided on the side facing the paper. The guide inclined surface is converging and narrowing in the direction from top to bottom and in the direction from front to back of the paper conveying path. The second conveying component has a lower conveying speed than the first conveying component, and the paper being conveyed forms a fish-scale-like stack on the second conveying component; Once the preset number of sheets of paper to be printed is reached, the second conveying component accelerates its conveying speed and instantly conveys all the paper on the second conveying component to the paper receiving mechanism.

[0009] In conjunction with the first aspect, in one possible implementation of the anti-paper curling paper feeding mechanism provided by the present invention, the rib has a degree of freedom to move along a direction perpendicular to the paper feeding direction to accommodate paper of different sizes.

[0010] In conjunction with the first aspect, in one possible implementation of the anti-paper curling paper feeding mechanism provided by the present invention, both the first conveying component and the second conveying component include: The carrier frame, a pair of drive rollers rotatably disposed at the front and rear ends of the carrier frame, a conveyor belt fitted on the drive rollers, and a first paper pressing roller above the end of the conveyor belt for pressing the paper onto the conveyor belt, the conveyor belt being in contact with the carrier frame; The first conveying component further includes a first paper pressing mechanism, which is correspondingly arranged with the conveyor belt, and the first protruding rib is connected to the first paper pressing mechanism in the paper conveying direction.

[0011] In conjunction with the first aspect, in one possible implementation of the anti-paper curling paper feeding mechanism provided by the present invention, the first paper pressing mechanism includes a paper pressing frame and a plurality of paper pressing balls, the paper pressing frame being spaced apart on the upper side of the conveyor belt, and the paper pressing balls being used to press onto the paper and rotate as the paper is fed.

[0012] In conjunction with the first aspect, in one possible implementation of the anti-paper curling paper feeding mechanism provided by the present invention, the second conveying assembly further includes a second paper pressing mechanism, which is pressed onto the upper side of the conveyor belt of the second conveying assembly to press the paper stacked in a fish-scale pattern onto the conveyor belt. The second paper pressing mechanism includes: A pair of guide rails are provided on both sides of the conveying direction of the second conveying component; The sliding frame has sliding engagement with the guide rail at both ends, and has the degree of freedom to slide parallel to the conveying direction; Several second paper-pressing rollers, connected to the sliding frame, are used to press the paper stacked in a fish-scale pattern onto the conveyor belt; A drive assembly is used to drive the sliding frame to slide along the guide rail.

[0013] In conjunction with the first aspect, in one possible implementation of the anti-paper curling paper feeding mechanism provided by the present invention, the second feeding assembly further includes a paper pressing spring and a plurality of guide plates, wherein the plurality of paper pressing springs are arranged parallel to the paper feeding direction; the plurality of guide plates are disposed upstream of the first paper pressing roller and the second paper pressing roller of the second feeding assembly, and are used to guide the leading edge of the paper into the lower side of the first paper pressing roller or the second paper pressing roller.

[0014] Secondly, embodiments of the present invention provide a printer including the aforementioned anti-paper curling paper feeding mechanism.

[0015] Thirdly, embodiments of the present invention provide a paper feeding method to prevent paper curling, for conveying paper from a printing mechanism to a paper receiving mechanism, comprising the following steps: The first conveying component is connected after the printing mechanism. The first conveying component is equipped with a paper pressing mechanism and a first rib is provided at the end of the first conveying component to gradually lift the two ends of the paper during transmission to a preset height. The second conveying component is connected after the first conveying component process. The height of the second conveying component is lower than that of the first conveying component. The second conveying component is provided with second ribs on both sides. The second ribs are used to push the two sides of the paper during the conveying process, so that the paper forms an inverted arch structure with high sides and low middle. The transmission speed of the second conveying component is adjusted to be lower than that of the first conveying component, and the paper being conveyed forms a fish-scale-like stack on the second conveying component.

[0016] The beneficial effects of the paper feeding mechanism, printer, and paper feeding method for preventing paper curling provided by the present invention are as follows: Compared with the prior art, the paper feeding mechanism, printer, and paper feeding method for preventing paper curling provided by the present invention form an inverted arch structure with a lower middle and higher sides by means of convex ribs. The slightly lower middle reduces the contact area between the paper and the conveying table, reduces friction, and can significantly enhance the structural rigidity of the paper during the conveying process, resisting the risk of bending and curling. It effectively solves the technical problem of easy bending and curling of paper printed with large amount of ink in the prior art, and ensures product quality. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of the paper feeding mechanism for preventing paper curling provided in an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of part A in the image; Figure 3 for Figure 1 Enlarged view of part B in the image; Figure 4 This is a front view of the paper feeding mechanism for preventing paper curling provided in an embodiment of the present invention, after removing one side of the frame. Explanation of reference numerals in the attached figures: 10. First conveying assembly; 11. Support frame; 12. Drive roller; 13. Conveyor belt; 20. Second conveying assembly; 31. First protruding rib; 32. Second protruding rib; 41. Paper pressing spring; 42. Guide plate; 51. Paper presser; 52. Paper press ball; 61. First paper press roller; 70. Frame; 81. Guide rail; 82. Sliding frame; 83. Second paper pressing roller; 84. Rack; 91. Rotating shaft; 92. Gear; 93. Driven bevel gear; 94. Driving bevel gear; 95. Handwheel; 96. Clamp; 97. Adjusting bolt. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0022] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0025] Please refer to the following: Figures 1 to 4 The paper feeding mechanism for preventing paper curling provided by the present invention will now be described. The paper feeding mechanism for preventing paper curling is suitable for being disposed between a printing mechanism and a paper receiving mechanism. The paper feeding mechanism includes a conveying component and ribs. The conveying component has a conveying surface for conveying paper. The ribs are positioned on both sides of the conveying surface along the paper conveying direction. The ribs exert an upward lifting force on the two edges of the paper during the conveying process, so that the paper forms an inverted arch structure that is low in the middle and high on both sides during the conveying process.

[0026] It should be noted that in this embodiment, the rib extends continuously along the length of the conveying channel, and its top contacts the two ends of the paper width direction and provides upward support. The height of the rib is set so that the paper can form a stable curved structure without affecting the printing operation of the print head on the middle area of ​​the paper. At the same time, the position of the rib is symmetrical with the center line of the conveying channel to ensure that the height of the paper on both sides is consistent.

[0027] Specifically, the paper feeding mechanism is connected to the printer frame 70; the ribs have the freedom to move perpendicular to the paper feeding direction. The ribs can be connected to the feeding mechanism via common adjustment structures such as slide rails and adjusting bolts. During the adjustment process, they can maintain their extension along the feeding direction, and after adjustment, they can be fixed in position by a locking structure to ensure support stability. Their adjustment range can cover the width specifications of common printing papers.

[0028] The beneficial effects of the anti-paper curling paper feeding mechanism provided in this embodiment of the invention are as follows: Compared with the prior art, the anti-paper curling paper feeding mechanism provided in this embodiment of the invention forms an inverted arch structure with a lower middle and higher sides by means of convex ribs. The slightly lower middle can reduce the contact area between the paper and the conveying table, reduce friction, and significantly enhance the structural rigidity of the paper during the conveying process, resist the risk of bending and curling, effectively solve the technical problem of easy bending and curling of paper with large ink volume in the prior art, and ensure product quality.

[0029] like Figure 1 and Figure 4 As shown, in a specific embodiment of the anti-paper curling paper feeding mechanism provided in this invention, the feeding assembly includes a first feeding assembly 10 and a second feeding assembly 20 arranged sequentially along the paper feeding direction.

[0030] A first rib 31 is provided at the end of the first conveying assembly 10, and the first rib 31 is located on both sides of the paper conveying path. A second rib 32 is provided in the second conveying assembly 20.

[0031] The first rib 31 has a smooth slope along the paper transport direction, and the slope height is 0.5cm-1.5cm; the second rib 32 is rod-shaped and protrudes 0.5cm-1.5cm above the transport surface.

[0032] It should be noted that in this embodiment, the smooth slope of the first rib 31 adopts a gradient design. The starting end of the slope is flush with the conveying surface of the first conveying component 10, and the end transitions to a preset height, so as to gradually lift the edge of the paper and avoid sudden lifting that would cause paper wrinkles. The height range of 0.5cm-1.5cm has been verified by multiple tests and can be adapted to common paper sizes such as A4 and A3, taking into account both anti-bending effect and smooth conveying. The second rib 32 is made of stainless steel or high-strength engineering plastic. The rod-shaped structure ensures that the lifting force is evenly distributed. Its spacing is adapted to the width of the paper to prevent the edge of the paper from detaching from the support of the rib.

[0033] In this embodiment, the gradual slope of the first rib 31 achieves a smooth transition of the paper edge, avoiding secondary deformation during the lifting process. Combined with the continuous support of the second rib 32, the stability of the inverted arch structure is further enhanced. The design of the two-stage conveying components makes the anti-bending measures relay, ensuring that the paper can maintain a stable shape throughout the entire conveying path. At the same time, the rod-shaped second rib 32 has a simple structure and high reliability, reducing equipment maintenance costs.

[0034] like Figure 1 and Figure 4 As shown, in a specific embodiment of the anti-paper curling paper feeding mechanism provided in this invention, the height of the feeding surface of the second feeding component 20 is lower than that of the feeding surface of the first feeding component 10.

[0035] On the conveying surface of the second conveying component 20, there is also a pair of guide plates 42 connected to the first conveying component 10. The guide plates 42 are symmetrically arranged on both sides of the paper conveying path, and a guide inclined surface is provided on the side facing the paper. The guide inclined surface is converging and narrowing in the direction from top to bottom and in the direction from front to back of the paper conveying path.

[0036] It should be noted that in this embodiment, the top-to-bottom converging end design is adapted to the trajectory of the paper falling from a height, while the front-to-back converging end design continuously positions the paper laterally during the conveying process, ensuring that the paper is always within the support range of the ribs.

[0037] In this embodiment, the bidirectional converging guide inclined surface realizes the dual positioning of the paper, which not only solves the alignment problem when the components are connected, but also prevents lateral deviation during the conveying process, ensuring that the lifting effect of the rib is effectively exerted, and further improving the working stability of the paper feeding mechanism.

[0038] like Figure 1 and Figure 4 As shown, in a specific embodiment of the anti-paper curling paper feeding mechanism provided in this invention, the transmission speed of the second conveying component 20 is lower than that of the first conveying component 10, and the paper being conveyed forms a fish-scale-like stack on the second conveying component 20.

[0039] Once the preset number of sheets of paper to be printed is reached, the second conveying component 20 increases its conveying speed and instantly conveys all the paper on the second conveying component 20 to the paper receiving mechanism, providing an interval for the paper stacking process of the paper receiving mechanism.

[0040] It should be noted that the paper is stacked in a fish-scale pattern on the second conveying component 20, which can further improve the overall strength and prevent the paper from bending.

[0041] like Figure 1 and Figure 4 As shown, in a specific embodiment of the anti-paper curling paper feeding mechanism provided in this invention, the first conveying component 10 and the second conveying component 20 both include a support frame 11, a pair of drive rollers 12 rotatably disposed at the front and rear ends of the support frame 11, a conveyor belt 13 mounted on the drive rollers 12, and a first paper pressing wheel 61 above the end of the conveyor belt 13 for pressing the paper onto the conveyor belt 13. The conveyor belt 13 is in contact with the support frame 11.

[0042] The first conveying component 10 also includes a first paper pressing mechanism, which is correspondingly arranged with the conveyor belt 13, and the first protruding rib 31 is connected to the first paper pressing mechanism in the paper conveying direction.

[0043] It should be noted that in this embodiment, the conveyor belt 13 is made of rubber with a high coefficient of friction to ensure sufficient driving force between it and the paper and to avoid tension fluctuations caused by slippage; the surface of the first paper pressing roller 61 is provided with an elastic rubber layer; the connection between the first paper pressing mechanism and the first rib 31 adopts an arc transition to ensure that the paper smoothly transitions from the positioning state to the lifting state and to avoid jamming at the connection.

[0044] In this embodiment, the fit design between the conveyor belt 13 and the support frame 11 ensures the flatness of the conveying surface and reduces uneven local stress on the paper; the pressing action of the first paper pressing roller 61 enhances the synchronization between the paper and the conveyor belt 13, avoiding bending caused by slippage; the connection design between the first paper pressing mechanism and the first protruding rib 31 realizes a seamless transition of "positioning-lifting", further improving the stability of paper conveying and structurally solving the problem of paper bending caused by uneven conveying surface and slippage in existing mechanisms.

[0045] like Figure 1 and Figure 2 As shown, in a specific embodiment of the anti-paper curling paper feeding mechanism provided in this invention, the first paper pressing mechanism includes a paper pressing frame 51 and a plurality of paper pressing balls 52. The paper pressing frame 51 is spaced apart on the upper side of the conveyor belt 13, and the paper pressing balls 52 are used to press on the paper and rotate with the paper feeding.

[0046] It should be noted that in this embodiment, the paper pressing ball 52 is rotatably connected to the paper pressing frame 51 to ensure synchronous movement with the paper and avoid relative friction that could cause the paper to shift.

[0047] In this embodiment, the rolling positioning design of the paper pressing ball 52 transforms sliding friction into rolling friction, which not only presses the paper to prevent it from skewing, but also reduces damage to the paper. The spaced paper pressing frame 51 ensures that the paper is subjected to uniform force, avoiding paper bending caused by excessive local pressure, and further improves the anti-bending effect of the paper feeding mechanism and the paper feeding quality.

[0048] like Figure 1 and Figure 3 As shown, in a specific embodiment of the paper feeding mechanism for preventing paper curling provided in this invention, the second conveying component 20 further includes a second paper pressing mechanism. The second paper pressing mechanism is pressed onto the upper side of the conveyor belt 13 of the second conveying component 20 to press the paper stacked in a fish-scale pattern onto the conveyor belt.

[0049] The second paper pressing mechanism includes a pair of guide rails 81, a sliding frame 82, a plurality of second paper pressing rollers 83, and a drive assembly. The pair of guide rails 81 are located on both sides of the conveying direction of the second conveying assembly 20. The two ends of the sliding frame 82 are slidably engaged with the guide rails 81, and have the freedom to slide parallel to the conveying direction. The plurality of second paper pressing rollers 83 are connected to the sliding frame 82 and are used to press the paper stacked in a fish scale pattern onto the conveyor belt 13. The drive assembly is used to drive the sliding frame 82 to slide along the guide rails 81.

[0050] Specifically, the upper side of the guide rail 81 is provided with a rack 84 of equal length. The drive assembly includes a rotating shaft 91 that rotatably engages with the sliding frame 82, a drive gear 92 located at both ends of the rotating shaft 91 and meshing with the rack 84, a driven bevel gear 93 coaxially connected to the rotating shaft 91, a drive shaft perpendicular to the rotating shaft 91 and rotatably engaging with the sliding frame 82, and a locking mechanism for locking the drive shaft. The lower end of the drive shaft is provided with an active bevel gear 94 that fits with the driven bevel gear 93, and the upper end is provided with a handwheel 95.

[0051] The locking mechanism includes a clamp 96 fixedly connected to the sliding frame 82 and an adjusting bolt 97 for adjusting the tightness of the clamp 96. The drive shaft passes through the clamp 96, and the drive shaft can be locked or released by turning the adjusting bolt 97.

[0052] It should be noted that the adjusting bolt 97 here refers to a part with a screw and a grip, such as a conventional bolt or a bolt with a handle (e.g., Figure 3 (as shown), wing bolts, etc.

[0053] Turning the handwheel 95 drives the sliding frame 82 to slide, adjusting the position of the second pressure roller 83 so that its position matches the paper size. This ensures that the second pressure roller 83 presses precisely against the leading edge of the initial formation of the fish-scale paper stack, preventing the paper from skewing. Furthermore, as the second conveying assembly 20 accelerates its rotation, the fish-scale paper stack is rapidly output, providing interval time for the paper stack alignment process.

[0054] In addition, the drive component can also be an electric actuator, a hydraulic cylinder, or other device or mechanism that can drive the sliding frame 82 to slide along the guide rail 81.

[0055] like Figure 1 and Figure 4 As shown, in a specific embodiment of the anti-paper curling paper feeding mechanism provided in this invention, the second feeding assembly 20 further includes a paper pressing spring 41 and a plurality of guide plates 43. The plurality of paper pressing springs 41 are arranged parallel to the paper feeding direction. The plurality of guide plates 43 are located upstream of the first paper pressing roller 61 and the second paper pressing roller 83 of the second feeding assembly 20, and are used to guide the leading edge of the paper into the lower side of the first paper pressing roller 61 or the second paper pressing roller 83.

[0056] It should be noted that in this embodiment, the paper-pressing spring 41 has good elastic recovery capability; the paper-pressing spring 41 is set at an angle to the conveying surface of the second conveying component 20, applying slight downward pressure to the paper, pressing and supporting the paper, effectively preventing the paper from skewing or curling; the number of paper-pressing springs 41 is 1-4, spaced apart along the direction perpendicular to the paper conveying direction, and all are parallel to the paper conveying direction to ensure uniform pressure distribution. The guide plate 43 is located upstream of the first paper-pressing roller 61 and the second paper-pressing roller 83, with its lower end extending under the first paper-pressing roller 61 or the second paper-pressing roller 83, to guide the leading edge of the paper into the lower side of the first paper-pressing roller 61 or the second paper-pressing roller 83, effectively preventing the leading edge of the paper from curling up, hitting the roller, and causing skewing. Moreover, the leading edge of the paper falling from the first conveying component 10 is guided by the guide 43 into the lower side of the second paper-pressing roller 83, forming an effective connection, further preventing the paper from curling or bending.

[0057] In this embodiment, the pressure spring 41 applies slight pressure to the paper, which, combined with the lifting effect of the second rib 32, makes the inverted arch structure more stable and effectively prevents the paper from skewing or curling. The elastic material design ensures that the pressure spring 41 will not damage the paper, while adapting to paper of different thicknesses, further improving the adaptability and anti-bending effect of the paper feeding mechanism. The guide plate 43 can effectively prevent the paper's leading edge from curling upwards, hitting the rollers, and causing skewing.

[0058] Based on the same inventive concept, embodiments of the present invention provide a printer including the aforementioned anti-paper curling paper feeding mechanism.

[0059] It should be noted that in this embodiment, the paper output port of the printer's printing mechanism is aligned with the paper input end of the first conveying component 10, and the paper input end of the paper receiving mechanism is adapted to the paper output end of the second conveying component 20, ensuring a smooth paper conveying path; the printer's control system is electrically connected to components such as the drive roller 12 and the first pressure roller 61 of the paper conveying mechanism, realizing adaptive adjustment of parameters such as conveying speed and stacking quantity to adapt to different printing task requirements.

[0060] The beneficial effects of the printer provided in this embodiment of the invention are as follows: Compared with the prior art, the printer provided in this embodiment of the invention effectively solves the technical problem of easy bending and curling of paper when printing with a large amount of ink in the prior art by integrating the above-mentioned anti-paper curling paper feeding mechanism, thus ensuring product quality; at the same time, the adaptability design of the paper feeding mechanism enables the printer to be compatible with paper of different specifications and weights, thereby improving the printer's applicability and user experience.

[0061] Based on the same inventive concept, embodiments of the present invention provide a paper feeding method to prevent paper curling, used for conveying paper from a printing mechanism to a paper receiving mechanism, comprising the following steps: The first conveying assembly 10 is connected after the printing mechanism. The first conveying assembly 10 is equipped with a paper pressing mechanism, and a first rib 31 is provided at the end of the first conveying assembly 10 to gradually lift the two ends of the paper during transmission to a preset height. The second conveying component 20 is connected after the first conveying component 10. The height of the second conveying component 20 is lower than that of the first conveying component 10. Second ribs 32 are provided on both sides of the second conveying component. The second ribs 32 are used to push the two sides of the paper during the conveying process, so that the paper forms an inverted arch structure with high sides and low middle. The transmission speed of the second conveying component 20 is adjusted to be lower than that of the first conveying component 10, and the paper being conveyed forms a fish-scale-like stack on the second conveying component 20.

[0062] It should be noted that in this embodiment, the preset height is consistent with the slope height of the first protruding rib 31 (0.5cm-1.5cm); the preset number of fish-scale stacks can be manually set through the printer's operation panel or automatically matched according to the printing task.

[0063] After a preset number of papers are stacked on the second conveying component 20, the second conveying component 20 is controlled to move quickly for a short period of time to quickly transport the stacked papers to the paper receiving mechanism. After that, the second conveying component 20 enters a slow state again and will not transport the papers to the paper receiving mechanism for a period of time, so as to allow the paper receiving mechanism time to sort the papers.

[0064] The beneficial effects of the paper feeding method for preventing paper curling provided in this embodiment of the invention are as follows: Compared with the prior art, the paper feeding method for preventing paper curling provided in this embodiment of the invention forms an inverted arch structure with a lower middle and higher sides by means of convex ribs. The slightly lower middle can reduce the contact area between the paper and the conveying table, reduce friction, and significantly enhance the structural rigidity of the paper during the conveying process, resist the risk of bending and curling, effectively solve the technical problem of easy bending and curling of paper with large ink volume in the prior art, and ensure product quality.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A paper feeding mechanism to prevent paper curling, suitable for being disposed between a printing mechanism and a paper receiving mechanism, characterized in that, The paper feeding mechanism includes: A conveying assembly, having a conveying surface for conveying paper; and The ribs are positioned on both sides of the conveying surface along the paper conveying direction. The ribs have an upward lifting force on the two sides of the paper during the conveying process, so that the paper forms an inverted arch structure with a low middle and high sides during the conveying process.

2. The paper feeding mechanism for preventing paper curling as described in claim 1, characterized in that, The conveying assembly includes a first conveying assembly (10) and a second conveying assembly (20) arranged sequentially along the paper conveying direction; A first rib (31) is provided at the end of the first conveying component (10), and the first rib (31) is provided on both sides of the paper conveying path. The second conveying assembly (20) is provided with a second protruding rib (32); The first rib (31) has a smooth slope along the paper transport direction, and the height of the slope is 0.5cm-1.5cm; the second rib (32) is rod-shaped and protrudes 0.5cm-1.5cm above the transport surface.

3. The paper feeding mechanism for preventing paper curling as described in claim 2, characterized in that, The height of the conveying surface of the second conveying component (20) is lower than that of the conveying surface of the first conveying component (10); On the conveying surface of the second conveying component (20), there is also a pair of guide plates (42) connected to the first conveying component (10). The guide plates (42) are symmetrically arranged on both sides of the paper conveying path, and a guide inclined surface is provided on the side facing the paper. The guide inclined surface is converging and narrowing in the direction from top to bottom and in the direction from front to back of the paper conveying. The transmission speed of the second conveying component (20) is lower than that of the first conveying component (10), and the paper being conveyed forms a fish-scale-like stack on the second conveying component (20); Once the preset number of sheets of paper to be printed is reached, the second conveying component (20) increases its conveying speed and instantly conveys all the sheets on the second conveying component (20) to the paper receiving mechanism.

4. The paper feeding mechanism for preventing paper curling as described in claim 1, characterized in that, The rib (30) has a degree of freedom to move along a direction perpendicular to the paper transport direction to accommodate different sizes of paper.

5. The paper feeding mechanism for preventing paper curling as described in claim 2, characterized in that, Both the first conveying assembly (10) and the second conveying assembly (20) include: The carrier (11), a pair of drive rollers (12) rotatably disposed at the front and rear ends of the carrier (11), a conveyor belt (13) mounted on the drive rollers (12), and a first paper pressing roller (61) above the end of the conveyor belt (13) for pressing the paper onto the conveyor belt (13), the conveyor belt (13) being in contact with the carrier (11); The first conveying component (10) further includes a first paper pressing mechanism, which is correspondingly arranged with the conveyor belt (13), and the first rib (31) is connected to the first paper pressing mechanism in the paper conveying direction.

6. The paper feeding mechanism for preventing paper curling as described in claim 5, characterized in that, The first paper pressing mechanism includes a paper pressing frame (51) and a plurality of paper pressing balls (52). The paper pressing frame (51) is spaced apart on the upper side of the conveyor belt (13), and the paper pressing balls (52) are used to press the paper and rotate with the paper being conveyed.

7. The paper feeding mechanism for preventing paper curling as described in claim 5, characterized in that, The second conveying assembly (20) further includes a second paper pressing mechanism, which is pressed on the upper side of the conveyor belt (13) of the second conveying assembly (20) to press the paper stacked in a fish scale pattern onto the conveyor belt; The second paper pressing mechanism includes: A pair of guide rails (81) are provided on both sides of the conveying direction of the second conveying assembly (20); The sliding frame (82) has sliding engagement with the guide rail (81) at both ends, and has the degree of freedom to slide parallel to the conveying direction; Several second paper pressing rollers (83) are connected to the sliding frame (82) to press the paper stacked in a fish scale pattern onto the conveyor belt (13); A drive assembly is used to drive the sliding frame (82) to slide along the guide rail (81).

8. The paper feeding mechanism for preventing paper curling as described in claim 7, characterized in that, The second conveying assembly (20) further includes a plurality of paper pressing springs (41) and a plurality of guide plates (43). The plurality of paper pressing springs (41) are arranged parallel to the paper conveying direction. The plurality of guide plates (43) are located upstream of the first paper pressing roller (61) and the second paper pressing roller (83) of the second conveying assembly (20) to guide the leading edge of the paper into the lower side of the first paper pressing roller (61) or the second paper pressing roller (83).

9. A printer, characterized in that, Includes a paper feeding mechanism for preventing paper curling as described in any one of claims 1-8.

10. A paper feeding method for preventing paper curling, used to transport paper from a printing mechanism to a paper receiving mechanism, characterized in that, Includes the following steps: The first conveying assembly (10) is connected after the printing mechanism. The first conveying assembly (10) is provided with a paper pressing mechanism, and a first rib (31) is provided at the end of the first conveying assembly (10) to gradually lift the two ends of the paper during transmission to a preset height. The second conveying component (20) is connected after the first conveying component (10) process. The height of the second conveying component (20) is lower than that of the first conveying component (10), and second ribs (32) are provided on both sides of the second conveying component (20). The second ribs (32) are used to push the two sides of the paper during the conveying process, so that the paper forms an inverted arch structure with high sides and low middle. The transmission speed of the second conveying component (20) is adjusted to be lower than that of the first conveying component (10), and the paper being conveyed forms a fish-scale-like stack on the second conveying component (20).

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