Printing medium flattening structure and printer
By designing a flattening structure with a gradually decreasing contact area, the problem of paper curling was solved, and stable cutting with a circular cutter was achieved.
Patent Information
- Application Number
- CN202520127241.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In existing technologies, paper is prone to curling at the edges after passing through a flattening mechanism, especially with the sides curling up too high, which affects the cutting of the circular cutter.
Design a printing media flattening structure, including a first structural component, a flattening component, and a second structural component arranged sequentially along the conveying direction. The flattening component has a contact surface that extends along the width of the conveying channel and gradually decreases in height from the middle to both ends. By changing the internal stress of the paper through contact pressure, the natural curling degree of the paper is controlled.
It effectively prevents paper from curling at the edges and bending in the opposite direction during the feeding process, ensuring that the circular cutter can cut smoothly and avoiding paper jams.
Smart Images
Figure CN223546031U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printer technology, and in particular to a printing media flattening structure and a printer. Background Technology
[0002] For printers using circular cutters, the circular cutter is mounted on the frame via a rotating shaft. The shaft can move relative to the frame in a direction perpendicular to the paper's transport path, thereby driving the circular cutter to cut the paper. This structure has high requirements for the paper's shape. Since cylindrical, rolled paper has a certain curling stress, printers typically incorporate a flattening structure. As the paper passes through this structure, it folds back to counteract the curling stress. Currently, most paper flattening components have a straight contact surface with the paper in the paper's width direction. Due to manufacturing errors, the paper often curls up on one or both sides after passing through the flattening mechanism. Curling, especially excessively high side curling, can easily cause the circular cutter to jam during cutting. Utility Model Content
[0003] According to one aspect of the present invention, the present invention provides a printing medium flattening structure to solve the problem in the prior art that after the paper passes through the flattening mechanism, the paper curls at the edges, especially the sides curl up too high, which affects the cutting of the circular cutter.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A printing media flattening structure has a transport channel for transporting printing media. The printing media flattening structure further includes a first structural member, a flattening member, and a second structural member arranged sequentially along the transport direction of the printing media. The flattening member has a contact surface. The first structural member and the second structural member are used to make the printing media adhere to the contact surface when it is transported. The flattening member extends along the width direction of the transport channel. Along the height direction of the transport channel, the height of the contact surface gradually decreases from the middle of the flattening member to both ends.
[0006] As a preferred embodiment of the printing medium flattening structure, the flattening component is elongated in the width direction of the conveying channel, and the contact surface is arc-shaped in the conveying direction of the printing medium.
[0007] As a preferred embodiment of the printing media flattening structure, the diameter of the contact surface is R along the conveying direction of the printing media, 0.5mm≤R≤2mm; and / or, along the conveying direction of the printing media, the included angle between the printing media located on both sides of the flattening member is α, 50°≤α≤90°.
[0008] As a preferred embodiment of the printing media flattening structure, within the range of 0.5mm≤R≤2mm and 50°≤α≤90°, the diameter R and the included angle α are negatively correlated; the included angle α and the interval between the first structural member and the second structural member are positively correlated.
[0009] As a preferred embodiment of the printing media flattening structure, the height difference between the highest and lowest points of the contact surface of the flattening component is 0.3mm to 3mm along the height direction of the conveying channel.
[0010] As a preferred embodiment of the printing medium flattening structure, the width of the printing medium is defined as L, and the portion of the flattening component extending from both ends to the middle at a distance of 1 / 10L is defined as a side segment. Along the height direction of the conveying channel, the slope of the contact surface of the side segment gradually increases from the middle to both ends, and the slope range of the contact surface of the side segment is 0.0052 to 0.0875.
[0011] As a preferred embodiment of the printing media flattening structure, the height of the contact surface changes continuously from the middle to both ends along the height direction of the conveying channel, and the contact surface is parabolic, near-parabolic, sinusoidal, or near-sinusoidal along the width direction of the conveying channel.
[0012] As a preferred embodiment of the printing media flattening structure, along the width direction of the conveying channel, the flattening member has a middle section and two ends located at both ends of the middle section; along the height direction of the conveying channel, the height of the middle section is consistent, and the height of the ends varies continuously.
[0013] As a preferred embodiment of the printing media flattening structure, it also includes a mounting frame, the flattening component protruding from the mounting frame, and the printing media flattening structure further includes reinforcing ribs, with the mounting frame and the flattening component being fixedly connected to the reinforcing ribs.
[0014] According to another aspect of the present invention, a printer is provided, including the above-described printing medium flattening structure, and further including an unwinding shaft, which is located upstream of the first structural member along the conveying direction of the printing medium. The printing medium is rolled up on the unwinding shaft toward a second side of the printing medium, the flattening member is disposed on a first side of the printing medium, and the first structural member and the second structural member are disposed on the second side of the printing medium.
[0015] As a preferred embodiment of the printer, it further includes a circular cutter and a substrate. Along the transport direction of the printing medium, the circular cutter and the substrate are both located downstream of the second structural member. The circular cutter is movable relative to the substrate to cut the printing medium. The substrate is disposed on the second side of the printing medium.
[0016] As a preferred embodiment of the printer, the second structural component is a rubber roller that can rotate relative to the flattening component, the rubber roller making rolling contact with the printing medium; the printer also includes a head plate located on a first side of the printing medium, the printing medium being able to pass between the head plate and the rubber roller.
[0017] The beneficial effects of this utility model are:
[0018] This utility model provides a printing medium flattening structure. The printing medium flattening structure has a conveying channel for conveying printing medium. The printing medium flattening structure also includes a first structural member, a flattening member, and a second structural member arranged sequentially along the conveying direction of the printing medium. The flattening member has a contact surface. The first structural member and the second structural member are used to make the printing medium adhere to the contact surface when it is conveyed. Specifically, when the printing medium adheres to the contact surface, under the tension of the first structural member and the second structural member at both ends, the printing medium and the contact surface have a certain contact pressure. Through the contact area with contact pressure, the contact surface can change the internal stress structure of the printing medium. The flattening component extends along the width of the conveying channel. Along the height of the conveying channel, the height of the contact surface gradually decreases from the middle to both ends. Influenced by the tension of the first and second structural components, the contact surface in the middle is higher, resulting in greater contact pressure on the printing medium in contact with it, thus causing a greater change in the internal stress of the printing medium and a better flattening effect. Conversely, the contact surface at both ends is lower, resulting in less contact pressure on the printing medium in contact with it, thus causing a smaller change in the internal stress of the printing medium and a worse flattening effect. This allows the sides of the printing medium to maintain a slight natural curl. By setting the height of the contact surface to gradually decrease at both ends, the degree of natural curl of the printing medium in the width direction is controlled to increase from the middle to both sides. Consequently, after passing through the flattening component, the side portions of the printing medium along the width direction of the conveying channel can tightly adhere to one side wall of the conveying channel, making it less prone to warping and reverse bending.
[0019] This embodiment also provides a printer, including the above-mentioned printing medium flattening structure, and also includes an unwinding shaft. Along the conveying direction of the printing medium, the unwinding shaft is located upstream of the first structural member. The printing medium is rolled up on the unwinding shaft. The flattening member is disposed on the first side of the printing medium, and the unwinding shaft is disposed on the second side of the printing medium. That is, the printing medium originally has a certain curling stress, and the printing medium is curled towards the second side. Because the flattening component is located on the first side of the printing medium, and the first and second structural components are located on the second side of the printing medium, after passing through the printing medium flattening structure, the contact pressure of the printing medium in the part that is in close contact with the middle contact surface is greater due to the higher height of the middle contact surface, resulting in a greater change in the internal stress of the printing medium and a better flattening effect. Conversely, the contact pressure of the printing medium in the part that is in close contact with the two ends is lower due to the lower height of the two ends contact surface, resulting in a smaller change in the internal stress of the printing medium and a worse flattening effect. This allows the two sides of the printing medium to maintain a slight natural curl. By setting the height of the two ends of the contact surface to gradually decrease, the degree of natural curl of the printing medium is controlled to increase from the middle to the two sides in the width direction of the printing medium. As a result, after passing through the flattening component, the side portions of the printing medium on both sides can be in close contact with one side wall of the conveying channel along the width direction, making it less prone to warping and reverse bending. In other words, the side portions of the printing medium on both sides can be in close contact with the substrate of the cutting device, facilitating circular blade cutting. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the first partial structure of the printer in an embodiment of this utility model;
[0021] Figure 2 This is a schematic diagram of the second partial structure of the printer in an embodiment of this utility model;
[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;
[0023] Figure 4 This is a first sectional view of a partial structure of the printer in an embodiment of this utility model;
[0024] Figure 5 yes Figure 4 Enlarged view of point B in the middle;
[0025] Figure 6 This is a schematic diagram of the printing medium flattening structure in an embodiment of this utility model;
[0026] Figure 7 This is a second sectional view of a partial structure of the printer in an embodiment of this utility model;
[0027] Figure 8 yes Figure 7Enlarged view of point C (flattened part);
[0028] Figure 9 This is a third sectional view of a partial structure of the printer in an embodiment of this utility model;
[0029] Figure 10 yes Figure 9 Enlarged view of point D (circular cutter and substrate).
[0030] In the picture:
[0031] 1. Mounting bracket;
[0032] 2. Flattened component; 21. Middle section; 22. End section;
[0033] 3. Reinforce the raised ribs;
[0034] 100. Printing media;
[0035] 200. First structural component;
[0036] 300. Second structural component; 310. Head piece;
[0037] 400. Unroll the reel;
[0038] 500, Circular cutter; 510, Substrate;
[0039] 600. Printer casing; 610. Paper output tray. Detailed Implementation
[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0043] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0044] For printers using circular cutters, the circular cutter is mounted on the frame via a rotating shaft. This shaft moves relative to the frame in a direction perpendicular to the paper's transport path, thus driving the circular cutter to cut the paper. Circular cutters are particularly suitable for wide-format printing media. In some applications, the cylindrically curled paper exhibits certain curling stress. Current printers typically incorporate a flattening structure to counteract this stress as the paper folds back as it passes through. However, most current paper flattening mechanisms have a straight contact surface with the paper across its width. Due to manufacturing errors, the paper often curls up on one or both sides after passing through the flattening mechanism. This curling, especially excessively high side curling, can easily cause the circular cutter to jam during cutting.
[0045] In response, this embodiment provides a printing media flattening structure to solve the problem in the prior art where paper curls up at the edges after passing through the flattening mechanism, especially with the sides curling up too high, affecting the cutting of the circular cutter. This can be applied to the field of printer technology.
[0046] Reference Figures 1-10The printing media flattening structure has a transport channel for transporting the printing media 100. In this embodiment, the printing media 100 is specifically a continuous sheet of printing paper or label paper, wound on an unwinding shaft. The printing media flattening structure also includes a first structural member 200, a flattening member 2, and a second structural member 300 arranged sequentially along the transport direction of the printing media 100. The flattening member 2 has a contact surface. The first structural member 200 and the second structural member 300 are used to ensure that the printing media 100 adheres tightly to the contact surface during transport. Specifically, the flattening member 2 is located on one side of the transport channel, and the first structural member 200 and the second structural member 300 are located on the other side of the transport channel. When the printing media 100 adheres tightly to the contact surface, under the tension of the first structural member 200 and the second structural member 300 at both ends, the printing media 100 and the contact surface have a certain contact pressure. Through the contact area with contact pressure, the contact surface can change the internal stress structure of the printing media 100.
[0047] The contact surface in this application refers to the surface of the printing medium 100 that can be in close contact with the flattening component 2 when it is being transported. It is not limited to one side surface of the flattening component. For example, if the flattening component has several grooves on the side surface near the printing medium 100, but the bottom of the grooves cannot be in close contact with the printing medium 100 when it is being transported, then it is not considered a contact surface.
[0048] Continue to refer to Figures 1-10 The flattening component 2 extends along the width of the conveying channel. Along the height of the conveying channel, the height of the contact surface gradually decreases from the middle to both ends. Specifically, the height of the contact surface can be continuously decreasing from the middle to both ends, or a part of the contact surface has a consistent height while the height of another part gradually changes, so that the overall height of the contact surface shows a trend of gradually decreasing from the middle to both ends. With this configuration, influenced by the tension of the first structural component 200 and the second structural component 300, the contact pressure of the printing medium 100 in close contact with the middle contact surface is greater due to its higher height, resulting in a greater change in the internal stress of the printing medium 100 and a better flattening effect. Conversely, the contact pressure of the printing medium 100 in close contact with the two end contact surfaces is smaller due to its lower height, resulting in a smaller change in the internal stress of the printing medium 100 and a worse flattening effect. This allows the sides of the printing medium 100 to maintain a slight natural curl. By setting the height of the two ends of the contact surface to gradually decrease, the degree of natural curl of the printing medium 100 is controlled to increase from the middle to the sides in the width direction of the printing medium 100. Consequently, after passing through the flattening component, the side portions of the printing medium 100 can closely adhere to one side wall of the conveying channel along the width direction, making it less prone to warping and reverse bending.
[0049] Furthermore, since the printing medium 100 is less prone to warping and bending on both sides after being flattened by this printing medium flattening structure, it can meet the requirements of a circular cutter and can be used in printers equipped with a circular cutter.
[0050] Continue to refer to Figures 1-10 The flattening component 2 is a long strip along the width of the conveying channel. Along the conveying direction of the printing medium 100, the contact surface is arc-shaped. This long strip structure is easy to manufacture and install, and can be integrally injection molded with the mounting frame. It provides greater stability during operation and makes it easier to adjust the diameter of the chamfered corners. The arc-shaped contact surface distributes force evenly as the printing medium 100 passes over it, preventing creases when the printing medium 100 is stationary relative to the flattening component 2 and thus preventing damage to the printing medium 100.
[0051] It is understandable that the flattening effect of the printing medium 100 is mainly related to the included angle between the printing medium 100 on both sides of the flattening part 2 and the diameter of the contact surface. The smaller the included angle between the printing medium 100 on both sides of the flattening part 2 and the smaller the diameter of the contact surface, the greater the force that the printing medium 100 can bear on the contact surface and the more temporary deformation of the paper adaptability. The better the effect of eliminating the original stress, and the easier it is for the printing medium 100 to form a state in which the two sides are curled relative to the middle part.
[0052] The angle between the printing media 100 on both sides of the flattening component 2 is mainly related to two factors: the height of the contact surface and the interval between the first structural component 200 and the second structural component 300. Therefore, the angle between the printing media 100 on both sides of the flattening component 2 can be changed by altering the height of the contact surface (here, the height difference of the contact surface is not too large, and the height is essentially the distance by which the contact surface protrudes relative to the first structural component 200 and the second structural component 300 towards the printing media 100) or by changing the relative position between the first structural component 200 and the second structural component 300. The size of the angle α is positively correlated with the interval between the first structural component 200 and the second structural component 300, that is, the larger the interval between the first structural component 200 and the second structural component 300, the larger the angle α.
[0053] In this embodiment, along the conveying direction of the printing medium 100, the diameter of the contact surface is R, 0.5mm ≤ R ≤ 2mm. Simultaneously, the included angle α between the printing media 100 located on both sides of the flattening member 2 is 50° ≤ α ≤ 90°. In other embodiments, a technician may also select a suitable diameter R within the range of 0.5mm ≤ R ≤ 2mm, and select a suitable included angle α according to actual needs. The included angle α may not be within the range of 50° ≤ α ≤ 90°, for example, α < 50° or α > 90°; or, a suitable diameter and included angle α may be selected within the range of 50° ≤ α ≤ 90°, and a suitable diameter R of the contact surface may be selected according to actual needs. The diameter R may not be within the range of 0.5mm ≤ R ≤ 2mm, for example, R < 0.5mm or R > 2mm.
[0054] In this embodiment, the value of R can specifically be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0mm. The value of α can specifically be 50°, 52°, 54°, 56°, 58°, 60°, 62°, 64°, 66°, 68°, 70°, 72°, 74°, 76°, 78°, 80°, 82°, 84°, 86°, 88°, or 90°.
[0055] Furthermore, within the range of 0.5mm≤R≤2mm and 50°≤α≤90°, for better flattening effect, the size of the diameter R and the size of the included angle α are negatively correlated. When the diameter R is set larger, the included angle α should be set smaller to maintain a good flattening effect.
[0056] Preferably, the width of the printing medium is defined as L, and the flattening member 2 is defined as the side section from both ends to the middle at a distance of L / 10. Along the height direction of the conveying channel, the slope of the contact surface of the side section gradually increases from the middle to both ends. The larger the slope, the faster the height change of the contact surface, and the greater the change in contact pressure. This results in a greater difference in the degree of change of internal stress of the printing medium 100, which more effectively corresponds to the natural curvature of the side section of the printing medium 100 and ensures that the side of the printing medium 100 can be attached to the substrate 510 of the cutting device.
[0057] Preferably, the slope of the contact surface of the side segment ranges from 0.0052 to 0.0875. When the slope is 0.0052, the angle between the tangent and the horizontal plane is 0.3°; when the slope is 0.0875, the angle between the tangent and the horizontal plane is 5°. Further, the slopes at the two ends of the side segment are the highest and lowest, respectively, and the difference between the slopes at the two ends ranges from 0.0262 to 0.0524.
[0058] More preferably, the slope of the side contact surface ranges from 0.0087 to 0.0524, and the corresponding tangents have angles of 0.5° to 3° relative to the horizontal plane.
[0059] Continue to refer to Figures 1-10 The flattening component 2 has the following two structures:
[0060] One approach involves continuously varying the height of the contact surface from the center towards both ends along the height direction of the transport channel. This means that the heights of adjacent portions of the contact surface are inconsistent, resulting in optimal flattening of the printing medium 100 in the center, with the flattening gradually decreasing towards the ends. This makes it easier for the printing medium 100 to curl relative to the center on both sides. Optionally, in this approach, the contact surface can be parabolic, near-parabolic, sinusoidal, or near-sinusoidal along the width direction of the transport channel. The slopes of these shapes increase towards both ends, with a greater variation than that of a circular arc.
[0061] In other embodiments, the contact surface may also be arc-shaped or nearly arc-shaped, and there is no limitation on this.
[0062] Another configuration involves the flattening member 2 having a middle section 21 and two ends 22 located at opposite ends of the middle section 21 along the width of the conveying channel. The middle section 21 has a uniform height along the height of the conveying channel, meaning that different positions of the middle section 21 have the same height. The height of the two ends 22 gradually decreases towards the ends, and the shape of these ends 22 is preferably a continuous decrease in height; it can be arc-shaped or straight, and there are no restrictions on this. This results in a consistent flattening effect for the printing medium 100 in contact with the middle section 21, which is superior to the flattening effect for the printing medium 100 in contact with the two ends 22. It also allows the printing medium 100 to form a state where the two sides are curled relative to the middle portion.
[0063] To achieve a better flattening effect, along the height direction of the conveying channel, preferably, the height difference between the highest and lowest points of the contact surface of the flattening component 2 is 0.3mm to 3mm. Below 0.3mm, the flattening effect is poor, and above 3mm, the macroscopic deformation of the printing medium 100 is large, which will increase the adaptability of the paper outlet and affect the aesthetics. If the height is too large, it will also cause severe macroscopic deformation of the printing medium 100 and affect the printing effect.
[0064] In other embodiments, designers may use height differences ranging from 0.3mm to 3mm, which are not limited here.
[0065] Continue to refer to Figures 1-10The printing media flattening structure also includes a mounting frame 1, which can be installed on the printer frame or other structures. A flattening component 2 protrudes from the mounting frame 1. The printing media flattening structure also includes reinforcing ribs 3, with the mounting frame 1 and the flattening component 2 simultaneously fixedly connected to the reinforcing ribs 3, thereby enhancing the structural strength between the mounting frame 1 and the flattening component 2. Optionally, the mounting frame 1, the flattening component 2, and the reinforcing ribs 3 are integrally formed to further simplify the processing flow of the printing media flattening structure. In this embodiment, the mounting frame 1, the flattening component 2, and the reinforcing ribs 3 are all plastic structures, and all three are integrally injection molded.
[0066] This embodiment also provides a printer, including the above-mentioned printing medium flattening structure, and also includes an unwinding shaft. Along the conveying direction of the printing medium 100, the unwinding shaft is located upstream of the first structural member. The printing medium 100 is rolled up on the unwinding shaft. The flattening member 2 is disposed on the first side of the printing medium 100, and the unwinding shaft 400 is disposed on the second side of the printing medium 100. That is, the printing medium 100 originally has a certain curling stress, and the printing medium 100 is curled towards the second side. Since the flattening component 2 is disposed on the first side of the printing medium 100, and the first structural component 200 and the second structural component 300 are disposed on the second side of the printing medium, after passing through the printing medium flattening structure, due to the higher height of the contact surface in the middle, the contact pressure of the printing medium 100 in the part that is in close contact with it is also greater, thus causing a greater change in the internal stress of the printing medium 100 and a better flattening effect; due to the lower height of the contact surfaces at both ends, the contact pressure of the printing medium 100 in the part that is in close contact with it is also smaller, thus causing a smaller change in the internal stress of the printing medium 100 and a worse flattening effect. This allows the two sides of the printing medium 100 to maintain a slight natural curl. By setting the height of the two ends of the contact surface to gradually decrease, the degree of natural curl of the printing medium in the width direction of the printing medium 100 is controlled to increase from the middle to both sides. As a result, after passing through the flattening component, along the width direction of the conveying channel, the side parts of the printing medium 100 on both sides can be in close contact with one side wall of the conveying channel, making it less likely to warp or bend in the opposite direction.
[0067] Continue to refer to Figures 1-10The printer also includes a circular cutter 500 and a substrate 510. Along the transport direction of the printing medium 100, both the circular cutter 500 and the substrate 510 are located downstream of the second structural member 300. The circular cutter 500 can move relative to the substrate 510 to cut the printing medium 100. The substrate 510 is disposed on the second side of the printing medium 100. Because the printing medium 100, after passing through the printing medium flattening structure, will exhibit a shape where the two sides are curled relative to the middle portion towards the second side of the printing medium 100, when the printing medium 100 is transported to the position of the circular cutter 500 and the substrate 510, the two sides of the printing medium 100 simultaneously contact the substrate 510. This prevents paper jams or poor cutting caused by the curled edges of the printing medium 100 when the circular cutter 500 cuts the printing medium 100.
[0068] Optionally, the printer also includes a printer housing 600, which has a paper output port 610 located at the end of the transport path of the printing medium 100, through which the printing medium 100 can be output. Because this printing medium flattening structure reduces warping and bending of the printing medium 100, its overall shape is more stable, and the warping on both sides of the printing medium 100 is relatively small, thus allowing for a smaller height for the paper output port 610.
[0069] Continue to refer to Figures 1-10 The second structural component 300 is a rotatable rubber roller relative to the flattening component 2. The rubber roller makes rolling contact with the printing medium 100, serving to transport the printing medium 100 and reducing frictional resistance through rolling contact. Specifically, the rubber roller can be a drive roller or a driven roller. The printer also includes a header 310, which is located on the first side of the printing medium 100. The printing medium 100 can pass between the header 310 and the rubber roller, thereby maintaining a constant transport path for the printing medium 100 through the second structural component 300 and the header 310.
[0070] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A printing media flattening structure, characterized in that, The printing medium flattening structure includes a conveying channel for conveying printing medium (100), and further includes a first structural member (200), a flattening member (2), and a second structural member (300) arranged sequentially along the conveying direction of the printing medium (100). The flattening member (2) has a contact surface. The first structural member (200) and the second structural member (300) are used to make the printing medium (100) adhere to the contact surface when it is conveyed. The flattening member (2) extends along the width direction of the conveying channel, and along the height direction of the conveying channel, the height of the contact surface gradually decreases from the middle of the flattening member (2) to both ends.
2. The printing medium flattening structure according to claim 1, characterized in that, The flattening component (2) is long and narrow along the width of the conveying channel, and the contact surface is arc-shaped along the conveying direction of the printing medium (100).
3. The printing medium flattening structure according to claim 2, characterized in that, Along the conveying direction of the printing medium (100), the diameter of the contact surface is R, 0.5mm≤R≤2mm; and / or, along the conveying direction of the printing medium (100), the included angle between the printing media (100) located on both sides of the flattening member (2) is α, 50°≤α≤90°.
4. The printing medium flattening structure according to claim 3, characterized in that, Within the range of 0.5mm≤R≤2mm and 50°≤α≤90°, the diameter R and the included angle α are negatively correlated; the included angle α and the interval between the first structural member (200) and the second structural member (300) are positively correlated.
5. The printing medium flattening structure according to claim 1, characterized in that, Along the height direction of the conveying channel, the height difference between the highest and lowest points of the contact surface of the flattening part (2) is 0.3mm to 3mm.
6. The printing medium flattening structure according to claim 1, characterized in that, The width of the printing medium is defined as L. The flattening component (2) is defined as the side section at a distance of 1 / 10L from both ends to the middle. Along the height direction of the conveying channel, the slope of the contact surface of the side section gradually increases from the middle to both ends, and the slope range of the contact surface of the side section is 0.0052 to 0.0875.
7. The printing media flattening structure according to any one of claims 1-6, characterized in that, Along the height direction of the conveying channel, the height of the contact surface changes continuously from the middle to both ends, and along the width direction of the conveying channel, the contact surface is parabolic, near-parabolic, sinusoidal, or near-sinusoidal.
8. The printing medium flattening structure according to any one of claims 1-6, characterized in that, Along the width direction of the conveying channel, the flattening member (2) has a middle section (21) and two ends (22) located at both ends of the middle section (21); along the height direction of the conveying channel, the height of the middle section (21) is consistent, and the height of the ends (22) varies continuously.
9. The printing media flattening structure according to any one of claims 1-6, characterized in that, It also includes a mounting bracket (1), the flattening component (2) protrudes from the mounting bracket (1), and the printing media flattening structure also includes a reinforcing rib (3). The mounting bracket (1) and the flattening component (2) are simultaneously fixedly connected to the reinforcing rib (3).
10. A printer, characterized in that, The printing medium flattening structure as described in any one of claims 1-9 further includes an unwinding shaft (400) along the transport direction of the printing medium (100), the unwinding shaft (400) being located upstream of the first structural member (200), the printing medium (100) being rolled up on the unwinding shaft (400) toward the second side of the printing medium (100), the flattening member (2) being disposed on the first side of the printing medium (100), and the first structural member (200) and the second structural member (300) being disposed on the second side of the printing medium (100).
11. The printer according to claim 10, characterized in that, It also includes a circular cutter (500) and a substrate (510). Along the transport direction of the printing medium (100), the circular cutter (500) and the substrate (510) are both located downstream of the second structural member (300). The circular cutter (500) is movable relative to the substrate (510) to cut the printing medium (100). The substrate (510) is disposed on the second side of the printing medium (100).
12. The printer according to claim 11, characterized in that, The second structural member (300) is a rubber roller that can rotate relative to the flattening member (2) and the rubber roller makes rolling contact with the printing medium (100); the printer also includes a head piece (310) located on a first side of the printing medium (100) and the printing medium (100) can pass between the head piece (310) and the rubber roller.