A paper feeding device and a printing apparatus

Abstract

The utility model discloses a paper feeding device, include: take paper board, with one side as paper feeding side, and the top surface of take paper board has the paper feeding face extending to paper feeding side, friction piece, connect in the top of paper feeding face, and the friction coefficient of friction piece is greater than the friction coefficient of paper feeding face, take paper piece, embed in paper feeding face, and the friction coefficient of take paper piece is greater than the friction coefficient of paper feeding face, and take paper piece is relatively closer to paper feeding side with friction piece, and the end portion of take paper piece close to paper feeding side is protruding to paper feeding face upwards, take paper subassembly, be located take paper board top, and take paper subassembly in along close paper feeding side's direction have taken paper wheel and paper separating wheel and set gradually, and take paper wheel is located take paper piece's top, the utility model provides the friction resistance to paper through friction piece and take paper piece, and utilize friction piece to paper and raise, especially suitable for the conveyance to the paper that curls upwards, effectively prevent the whole paper to move and jam paper road space, improve the stability of paper conveying and separating.

Description

Technical Field

[0001] This utility model relates to a conveying device, and more particularly to a paper feeding device and a printing device. Background Technology

[0002] In printing equipment such as scanners and copiers, the principle of paper feeding and separation is that the paper feed roller uses friction to transport the top sheet of the stack of paper towards the paper separation roller, which then feeds the paper out. This method is problematic for curled paper, especially paper curled upwards. During paper feeding, the upward curl of the paper head hinders separation and reduces the contact area between the bottom of the paper and the feed roller. This can easily lead to the entire stack of paper being fed towards the paper separation roller. Furthermore, because the paper path space is limited when feeding together, the paper head can get stuck after being fed forward, preventing the paper from reaching the paper separation roller and resulting in the inability to pick up paper. Therefore, there is an urgent need for a device that can stably feed curled paper. Utility Model Content

[0003] The purpose of this utility model is to provide a paper feeding device and a printing equipment to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this utility model is:

[0005] A paper feeding device includes: a paper take-up plate with one side designated as a paper feed side, the top surface of the paper take-up plate having a paper feed surface extending toward the paper feed side; a friction plate connected to the top of the paper feed surface, the friction coefficient of the friction plate being greater than that of the paper feed surface; a paper take-up piece embedded in the paper feed surface, the friction coefficient of the paper take-up piece being greater than that of the paper feed surface, the paper take-up piece being closer to the paper feed side than the friction plate, and the end of the paper take-up piece near the paper feed side protruding upward from the paper feed surface; and a paper take-up assembly located above the paper take-up plate, the paper take-up assembly having a paper take-up roller and a paper separating roller arranged sequentially along the direction near the paper feed side, the paper take-up roller being located above the paper take-up piece.

[0006] This technical solution has at least the following beneficial effects: When stacked papers are placed on an inclined paper pick-up board, the entire stack of papers is better maintained in the feeding position under the action of gravity. At this time, the paper at the bottom is in contact with the friction plate and the paper pick-up plate. The friction plate can raise the placement height of the paper at the top of the paper pick-up board, which helps to ensure that the paper at the bottom can contact the paper pick-up plate. When picking up the paper, the paper pick-up wheel in the paper pick-up assembly rotates. Due to the frictional resistance between the friction plate and the paper pick-up plate, the entire stack of papers will not move directly to the paper separating wheel. The paper pick-up wheel brings the paper at the top to the paper separating wheel, and then the paper separating wheel sends the paper out. In this way, the friction plate and the paper pick-up plate provide frictional resistance to the paper, and the friction plate raises the paper. This is especially suitable for conveying upward-curving paper, effectively preventing the entire stack of paper from moving and blocking the paper path space, and improving the stability of paper conveying and separating.

[0007] As a further improvement to the above technical solution, the top surface of the friction plate is provided with a first inclined surface and a second inclined surface in sequence along the direction near the paper feed side. The first inclined surface and the second inclined surface extend towards the direction near the paper feed side, and the angle between the first inclined surface and the horizontal plane is smaller than the angle between the second inclined surface and the horizontal plane. The inclination angle of the first inclined surface is smaller, which can better connect with the external paper feeding structure, so that the paper can be smoothly transferred to the paper feed surface. The inclination angle of the second inclined surface is larger, which can guide the paper placed on the friction plate, so that the paper on the friction plate is tilted towards the paper pick-up plate. This can not only improve the smoothness of the paper feeding to the paper feed surface, but also further ensure the contact area between the paper and the paper pick-up plate, thereby improving the paper separation effect.

[0008] As a further improvement to the above technical solution, the distance between the top surface of the friction plate and the paper feed surface is h, and the horizontal distance between the friction plate and the paper pick-up plate is L, wherein the ratio of L to h ranges from 6 to 12. The thickness of the friction plate near the paper feed end affects the direction of the paper when it exits the friction plate, while the horizontal distance between the friction plate and the paper pick-up plate affects the contact position of the paper with the paper pick-up plate when it reaches the paper pick-up plate, thus affecting the contact area between the paper and the paper pick-up plate. Therefore, controlling the ratio of L to h within this range is beneficial to further increase the contact area between the paper and the paper pick-up plate, thereby improving the paper conveying and separating effect of stacked papers.

[0009] As a further improvement to the above technical solution, the value of L ranges from 5 mm to 35 mm. The overall area, weight, and curl of the paper will affect the position of the paper falling from the friction plate to the paper pick-up plate. Controlling the horizontal distance L between the friction plate and the paper pick-up plate within this range is beneficial to further increase the contact area between the paper and the paper pick-up plate, thereby improving the conveying and separating effect of stacked paper.

[0010] As a further improvement to the above technical solution, the value of h ranges from 0.8 mm to 3 mm. If the thickness of the friction plate near the paper feed end is too large, it will raise the stacked paper too much, while if the thickness near the paper feed end is too small, it will reduce the contact area between the paper and the paper pick-up plate, especially for upward-curved paper. Therefore, controlling the thickness of the friction plate near the paper feed end within this range is beneficial to further increase the contact area between the paper and the paper pick-up plate, thereby improving the conveying and separating effect of the stacked paper.

[0011] As a further improvement to the above technical solution, this utility model also includes a paper feeding tray, which is connected to the side of the take-up plate away from the paper feeding side. A paper feeding surface is formed within the paper feeding tray, and this paper feeding surface is higher than the top surface of the friction plate. The paper feeding tray is used to hold the paper to be fed. In use, stacked papers are placed on the paper feeding tray. Because the paper feeding surface within the paper feeding tray is higher than the top surface of the friction plate, the paper can smoothly enter the paper feeding surface, thus facilitating paper feeding and replenishment to the take-up plate.

[0012] As a further improvement to the above technical solution, the distance between the bottom side of the paper-taking component and the paper-taking plate is H, where H is less than 30 mm. A space is formed between the bottom side of the paper-taking component and the paper-taking plate to accommodate the curled portion of the paper. The distance H between them is the maximum height of the paper that can be curled. Therefore, it is necessary to ensure that the maximum curled height of the paper is less than 30 mm to ensure that the paper can be smoothly inserted.

[0013] As a further improvement to the above technical solution, the friction plate and the paper-taking plate are made of either plastic or rubber. Using plastic friction plates and paper-taking plates can better control costs and provide sufficient friction to the paper, thereby preventing stacked paper from moving towards the separating roller during paper feeding.

[0014] As a further improvement to the above technical solution, the top surface of the friction pad is provided with a first friction pattern. The first friction pattern can increase the friction force on the top surface of the friction pad. Similarly, the second friction pattern can increase the friction force on the top surface of the paper-taking piece, thereby providing better frictional resistance to the paper.

[0015] A printing device includes the paper feeding device described above.

[0016] The technical solution has at least the following beneficial effects: In this printing device, since the paper feeding device provides frictional resistance to the paper through the friction plate and the paper picking plate, and uses the friction plate to lift the paper, it is especially suitable for conveying upward curled paper, effectively preventing the entire stack of paper from moving and blocking the paper path space, improving the stability of paper conveying and separating, thereby improving the stability of the printing device operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0018] Figure 1 This is a top view of the paper feeding device of this utility model.

[0019] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure.

[0020] Figure 3 yes Figure 2 A schematic diagram of the structure after removing the paper feed tray.

[0021] Figure 4 yes Figure 3 A magnified view of part B.

[0022] In the attached diagram: 100-paper takeout plate, 110-paper feed surface, 200-friction plate, 210-first inclined surface, 220-second inclined surface, 300-paper takeout plate, 400-paper takeout assembly, 410-paper takeout roller, 420-paper separating roller, 500-paper feed tray, 510-paper feed surface. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Reference Figures 1 to 3 A paper feeding device includes a paper feeding board 100, a friction plate 200, a paper feeding disc 300, and a paper feeding assembly 400. One side of the paper feeding board 100 is designated as the paper feeding side, and the top surface of the paper feeding board 100 has a paper feeding surface 110 extending towards the paper feeding side. The friction plate 200 is connected to the top of the paper feeding surface 110, and the friction coefficient of the friction plate 200 is greater than that of the paper feeding surface 110. The paper feeding disc 300 is embedded within the paper feeding surface 110, and the friction coefficient of the paper feeding disc 300 is greater than that of the paper feeding surface 110. The paper feeding disc 300 is closer to the paper feeding side than the friction plate 200. The end of the paper sheet 300 near the paper feed side protrudes upward from the paper feed surface 110; the paper take-up assembly 400 is located above the paper take-up board 100. The paper take-up assembly 400 has a paper take-up wheel 410 and a paper separate wheel 420 arranged sequentially along the direction near the paper feed side. The paper take-up wheel 410 is located above the paper take-up sheet 300. In practical applications, the paper take-up assembly 400 includes a mounting shell. The mounting shell and the paper take-up board 100 are both mounted on the outer casing to maintain their relative positions. The paper take-up wheel 410 and the paper separate wheel 420 are rotatably connected to the mounting shell and are driven to rotate by the drive source of the outer casing.

[0028] As described above, when stacked papers are placed on an inclined paper pick-up plate 100, the entire stack of papers is better maintained in the feeding position under the action of gravity. At this time, the paper at the bottom is in contact with the friction plate 200 and the paper pick-up plate 300. The friction plate 200 can raise the placement height of the paper at the top of the paper pick-up plate 100, which helps to ensure that the paper at the bottom can contact the paper pick-up plate 300. When picking up the paper, the paper pick-up roller 410 in the paper pick-up assembly 400 rotates. The entire stack of papers will not move directly to the paper separating roller 420 due to the frictional resistance between the friction plate 200 and the paper pick-up plate 300. The paper pick-up roller 410 brings the paper at the top to the paper separating roller 420, and then the paper separating roller 420 feeds the paper out. In this way, the friction plate 200 and the paper pick-up plate 300 provide frictional resistance to the paper, and the friction plate 200 raises the paper. This is especially suitable for conveying upward-curving paper, effectively preventing the entire stack of paper from moving and blocking the paper path space, and improving the stability of paper conveying and separating.

[0029] For the coefficient of friction of the paper take-up piece 300 to be greater than the coefficient of friction of the paper feed surface 110, the friction force of the paper take-up piece 300 is at least 8% greater than the friction force of the paper feed surface 110. For example, the friction force of the paper take-up piece 300 is more than 10% greater than the friction force of the paper feed surface 110.

[0030] The tilt angle of the top surface of the friction plate 200 affects the paper feeding through its top side. To improve the paper separating effect, in this embodiment, the top surface of the friction plate 200 is sequentially provided with a first inclined surface 210 and a second inclined surface 220 along the direction close to the paper feeding side. The first inclined surface 210 and the second inclined surface 220 extend towards the direction close to the paper feeding side, such as... Figure 4 As shown, the angle between the first inclined plane 210 and the horizontal plane is α, and the angle between the second inclined plane 220 and the horizontal plane is β. The angle α between the first inclined plane 210 and the horizontal plane is smaller than the angle β between the second inclined plane 220 and the horizontal plane. The smaller angle of the first inclined plane 210 allows for better connection with the external paper feeding structure, enabling a smoother transition of the paper to the paper feed surface 110. The larger angle of the second inclined plane 220 guides the paper placed on the friction plate 200, causing the paper on the friction plate 200 to tilt towards the paper pick-up plate 300. This improves the smoothness of paper feeding to the paper feed surface 110 and further ensures the contact area between the paper and the paper pick-up plate 300, thus improving the paper separation effect.

[0031] The thickness of the friction plate 200 near the paper feed end affects the direction of the paper as it exits the friction plate 200, while the horizontal distance between the friction plate 200 and the paper take-up plate 300 affects the contact position of the paper with the paper take-up plate 300 when it reaches the paper take-up plate 300, thus affecting the contact area between the paper and the paper take-up plate 300. Therefore, in this embodiment, the distance between the top surface of the friction plate 200 and the paper feed surface 110 is defined as h. When the friction plate 200 is directly fixed to the paper feed surface 110, its thickness is h. When a groove is provided on the paper feed surface 110 to accommodate the friction plate 200, the height of the friction plate 200 protruding from the groove is h. The horizontal distance between the friction plate 200 and the paper take-up plate 300 is defined as L, where the ratio of L to h ranges from 6 to 12. Controlling the ratio of L to h within this range helps to further increase the contact area between the paper and the paper take-up plate 300, thereby improving the paper conveying and separating effect for stacked papers. Preferably, the ratio of the thickness h of the friction plate 200 near the paper feed side end to the horizontal distance L between the friction plate 200 and the paper pick-up plate 300 is 15. This allows for better coordination of the distance at which the paper is lifted and fed to the paper pick-up plate 300.

[0032] Furthermore, the value of L ranges from 5 mm to 35 mm. The overall area, weight, and curl of the paper affect the position of the paper falling from the friction plate 200 to the paper pick-up plate 300. Controlling the horizontal distance L between the friction plate 200 and the paper pick-up plate 300 within this range helps to further increase the contact area between the paper and the paper pick-up plate 300, thereby improving the conveying and separating effect of stacked paper. Preferably, the horizontal distance L between the friction plate 200 and the paper pick-up plate 300 is approximately 15.5 mm, so that there is a larger contact area between the paper and the paper pick-up plate 300.

[0033] Furthermore, the value of h ranges from 0.8 mm to 3 mm. If the thickness of the friction plate 200 near the paper feed end is too large, it will excessively raise the stacked paper; conversely, if the thickness is too small, it will reduce the contact area between the paper and the paper pick-up plate 300, especially for upwardly curled paper. Therefore, controlling the thickness of the friction plate 200 near the paper feed end within this range helps to further increase the contact area between the paper and the paper pick-up plate 300, thereby improving the paper conveying and separating effect on the stacked paper. Preferably, the thickness h of the friction plate 200 near the paper feed end is approximately 1 mm, thereby better achieving the effect of appropriately raising the paper to increase the contact area between the paper and the paper pick-up plate 300.

[0034] This utility model also includes a paper feeding tray 500, which is connected to the side of the paper take-up plate 100 away from the paper feeding side. A paper feeding surface 510 is formed within the paper feeding tray 500, and the paper feeding surface 510 is higher than the top surface of the friction plate 200. In practical applications, the paper feeding tray 500 can be connected to one side of the paper take-up plate 100 by means of clips or screws. The paper feeding tray 500 is used to hold the paper to be fed. In use, stacked paper is placed on the paper feeding tray 500. Because the paper feeding surface 510 within the paper feeding tray 500 is higher than the top surface of the friction plate 200, the paper can smoothly enter the paper feeding surface 110, thus facilitating paper feeding and replenishment to the paper take-up plate 100.

[0035] The distance H between the bottom side of the paper-taking component 400 and the paper-taking piece 300 is less than 30 mm. A space is formed between the bottom side of the paper-taking component 400 and the paper-taking piece 300 to accommodate the curled portion of the paper. The distance H between them is the maximum height of the curled paper that can be accommodated. Therefore, it is necessary to ensure that the maximum curled height of the paper is less than 30 mm to ensure that the paper can be smoothly inserted.

[0036] The friction plate 200 and the paper-taking plate 300 primarily utilize their top surfaces to provide friction to the paper. They can be made of materials with a certain degree of frictional resistance, such as rubber or plastic. In this embodiment, the friction plate 200 and the paper-taking plate 300 are either made of plastic or rubber. Using plastic friction plates 200 and 300 allows for better cost control and provides sufficient friction to the paper, thereby preventing the stacked paper from moving towards the separating roller 420 during paper feeding. However, in other embodiments, other materials with similar coefficients of friction to plastic or rubber can also be used.

[0037] To better increase the resistance of the friction plate 200 to the paper, in this embodiment, the top surface of the friction plate 200 is provided with a first friction texture, for example, the first friction texture can be a structure such as raised particles or stripes. The first friction texture can increase the friction force on the top surface of the friction plate 200, thereby providing better frictional resistance to the paper.

[0038] Similarly, to better increase the resistance of the paper pick-up piece 300 to the paper, in this embodiment, the top surface of the paper pick-up piece 300 is provided with a second friction texture. For example, the second friction texture can adopt a structure such as raised particles or stripes. The second friction texture can increase the frictional force on the top surface of the paper pick-up piece 300, thereby providing better frictional resistance to the paper.

[0039] A printing device includes the paper feeding device described above.

[0040] In this printing device, the paper feeding device provides frictional resistance to the paper through the friction plate 200 and the paper picking plate 300, and uses the friction plate 200 to lift the paper, which is especially suitable for conveying upward curled paper. This effectively prevents the entire stack of paper from moving and blocking the paper path space, improves the stability of paper conveying and separating, and thus improves the stability of the printing device's operation.

[0041] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A paper feed device characterized by comprising: include: The paperboard (100) is used as the paper feed side, and the top surface of the paperboard (100) has a paper feed surface (110) extending toward the paper feed side; A friction plate (200) is connected to the top of the paper feed surface (110), and the friction coefficient of the friction plate (200) is greater than that of the paper feed surface (110). Take a paper piece (300) and embed it into the paper feed surface (110). The friction coefficient of the paper piece (300) is greater than that of the paper feed surface (110). The paper piece (300) is closer to the paper feed side than the friction piece (200). The end of the paper piece (300) near the paper feed side protrudes upward from the paper feed surface (110). A paper-feeding assembly (400) is located above the paper-feeding plate (100). Inside the paper-feeding assembly (400), a paper-feeding wheel (410) and a paper-separating wheel (420) are arranged sequentially along the direction close to the paper feed side. The paper-feeding wheel (410) is located above the paper-feeding piece (300).

2. A paper feed device according to claim 1, characterized in that: The top surface of the friction plate (200) is provided with a first inclined surface (210) and a second inclined surface (220) in sequence along the direction close to the paper feed side. The first inclined surface (210) and the second inclined surface (220) extend in the direction close to the paper feed side, and the angle between the first inclined surface (210) and the horizontal plane is smaller than the angle between the second inclined surface (220) and the horizontal plane.

3. A paper feed device according to claim 1, characterized in that: The distance between the top surface of the friction plate (200) and the paper feed surface (110) is h, and the horizontal distance between the friction plate (200) and the paper take-up plate (300) is L, wherein the ratio of L to h is between 6 and 12.

4. A paper feed device according to claim 3, characterized in that: The value of L ranges from 5 mm to 35 mm.

5. A paper feed device according to claim 3, characterized in that: The value of h ranges from 0.8 mm to 3 mm.

6. A paper feed apparatus according to claim 1, characterized by: It also includes a paper feed tray (500), which is connected to the side of the paper take-up tray (100) away from the paper feed side. A paper feed surface (510) is formed in the paper feed tray (500), which is higher than the top surface of the friction plate (200).

7. A paper feed apparatus according to claim 1, wherein: The distance between the bottom side of the paper-taking component (400) and the paper-taking piece (300) is H, and the value of H is less than 30 mm.

8. The paper feed apparatus according to claim 1, wherein: The friction plate (200) and the paper-taking plate (300) are made of either plastic or rubber.

9. The paper feed apparatus according to claim 1, wherein: The top surface of the friction plate (200) is provided with a first friction texture, and the top surface of the paper taking piece (300) is provided with a second friction texture.

10. A printing device, characterized by: Includes the paper feeding device as described in any one of claims 1 to 9.

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