A peeling structure for preventing a base paper from loosening and a label printer

Abstract

The application discloses a peeling structure for preventing base paper loosening and a label printer. The peeling structure comprises a peeling channel, a driven rubber roller and oppositely arranged a print head and a print rubber roller, the end of the peeling channel is provided with a peeling assembly, the driven rubber roller is in abutment with the print rubber roller, the driven rubber roller is provided with first grooves, the print rubber roller is provided with second grooves, the second grooves are in abutment with the first grooves when the print rubber roller rotates in a first direction, and the second grooves are opposite to the first grooves when the print rubber roller rotates in a second direction. The label printer comprises the peeling structure. The application can ensure sufficient traction force to overcome the resistance during peeling, thereby well pulling the base paper, and can keep the base paper taut during peeling to prevent loosening. The application can ensure small friction force between the two rollers during paper returning without affecting the pull-back force of the print rubber roller on the base paper, so as to ensure the stability during peeling.

Description

Technical Field

[0001] This invention relates to the technical field of printers, and particularly to a peeling structure for preventing backing paper from loosening and a label printer. Background Technology

[0002] In label printers, printed label paper needs to be peeled into label and backing paper. Specifically, during peeling, when the printed label paper passes the peeling disc, the sharp edge of the peeling disc causes the more rigid backing paper to bend and change direction along the edge, while the relatively soft label paper moves in a straight line, thus completing the peeling between the backing paper and the label at that edge. During peeling, a rigid driven roller or a non-directional soft roller is set under the printing roller, allowing the changed-direction backing paper to pass between the printing roller and the rigid driven roller (or non-directional soft roller). The printing roller rotates to pull the backing paper, thus achieving peeling. However, after continuously peeling label paper, insufficient traction of the printing roller on the backing paper causes the backing paper at the peeling disc position to easily loosen, resulting in peeling failure. Moreover, when the friction between the printing roller and the rigid driven roller is too high, the printing roller will be affected by excessive friction when retracting the backing paper, causing the backing paper to easily loosen or slip, resulting in subsequent peeling failures. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. The primary objective is to provide a peeling structure that prevents the backing paper from loosening.

[0004] The second objective is to provide a label printer that includes the aforementioned peeling structure.

[0005] The technical solution adopted in this invention is as follows: the peeling structure includes a peeling channel, a driven rubber roller, and a print head and a print roller arranged opposite to each other. The print head and the print roller are connected to the peeling channel. A peeling component is provided at the end of the peeling channel. The driven rubber roller abuts against the print roller. The driven rubber roller is provided with a first texture, and the print roller is provided with a second texture. When the print roller rotates in a first direction, the second texture abuts against the first texture. When the print roller rotates in a second direction, the second texture disengages from the first texture.

[0006] Furthermore, the first texture consists of a plurality of first engagement teeth distributed on the driven rubber roller, and the second texture consists of a plurality of second engagement teeth distributed on the printing rubber roller. Both the first engagement teeth and the second engagement teeth are inclined. When the printing rubber roller rotates in the first direction, the tooth tip of the corresponding second engagement tooth engages with the corresponding first engagement tooth, and when the printing rubber roller rotates in the second direction, the tooth tip of the corresponding second engagement tooth disengages from the corresponding first engagement tooth.

[0007] Furthermore, the first texture is a plurality of protrusions or grooves distributed on the driven rubber roller, and the second texture is a plurality of grooves or protrusions distributed on the printing rubber roller. The corresponding protrusions can be embedded in the corresponding grooves. One side of the groove is a smooth surface and the other side is a rough surface. When the printing rubber roller rotates in the first direction, the corresponding protrusions are engaged in the corresponding grooves and abut against the rough surface. When the printing rubber roller rotates in the second direction, the corresponding protrusions abut against the smooth surface.

[0008] Furthermore, the first texture consists of a plurality of first protrusions distributed on the driven rubber roller, and the second texture consists of a plurality of second protrusions distributed on the printing rubber roller. Both the first protrusion and the second protrusion include a narrow end and a wide end, and the area between the narrow end and the wide end gradually increases in the circumferential direction.

[0009] Furthermore, the cross-sections of both the first protrusion and the second protrusion are curved, triangular, or trapezoidal.

[0010] Furthermore, the first texture is evenly distributed on the driven rubber roller, and the second texture is evenly distributed on the printing rubber roller.

[0011] Furthermore, the peeling assembly includes a peeling sheet and a spacer plate. The two ends of the spacer plate are fixedly connected to the peeling sheet. A peeling gap is provided between the peeling sheet and the spacer plate, and the peeling gap is located in the peeling channel.

[0012] Furthermore, both ends of the fixed-distance pressure plate are provided with equal-height bosses, and the bottoms of the two equal-height bosses are fixedly connected to the upper end surface of the peeling sheet.

[0013] Furthermore, the paper feed end of the fixed-distance pressure plate is provided with an inclined paper guide.

[0014] Furthermore, the peeling structure also includes a peeling mounting base, the driven rubber roller is rotatably connected to the peeling mounting base, and both ends of the driven rubber roller are connected to a first bushing. The first bushing abuts against one end of the elastic element, and the other end of the elastic element abuts against the peeling mounting base.

[0015] Furthermore, a label detection sensor is provided on the peeling mounting base, which is used to detect whether the label between the driven rubber roller and the printing rubber roller has been removed.

[0016] Furthermore, both ends of the printing roller are connected to second bushings, and one end of the printing roller is connected to a printing roller gear.

[0017] In addition, the present invention also provides a label printer, which includes a printer body and a peeling structure provided on the printer body to prevent the backing paper from loosening.

[0018] The beneficial effects of this invention are:

[0019] In contrast to the shortcomings of existing technologies, in this invention, during peeling, the printing roller rotates in a first direction, causing the driven roller, which is in contact with the printing roller, to rotate together. During this process, the second textured surface abuts against the first textured surface, maximizing the friction between the two rollers and the base paper, thus maximizing the peeling traction force transferred to the base paper. This results in a stable and powerful peeling action, preventing the base paper from loosening during continuous peeling. During paper ejection, the printing roller rotates in a second direction opposite to the first direction, causing the driven roller to reverse direction. During this process, the second textured surface disengages from the first textured surface, minimizing the friction between the two rollers and the base paper. This prevents the printing roller from experiencing excessive friction between the two rollers during paper ejection, which could cause the base paper to slip or loosen. This ensures that the label paper remains taut, guaranteeing a better peeling effect. Therefore, the peeling structure has the advantage of excellent peeling performance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a cross-sectional view of the peeling structure of the present invention;

[0022] Figure 2 This is a partially enlarged schematic diagram of the first and second textures of the peeling structure of the present invention;

[0023] Figure 3 This is a partially enlarged schematic diagram of the first and second textures of the peeling structure of the present invention in Embodiment 1;

[0024] Figure 4This is a partially enlarged schematic diagram of the first and second textures in Embodiment 2 of the peeling structure of the present invention;

[0025] Figure 5 This is a three-dimensional structural schematic diagram of the first texture of the peeling structure of the present invention, which is a third embodiment.

[0026] Figure 6 This is a schematic diagram of the planar structure of the second texture in Embodiment 3 of the peeling structure of the present invention;

[0027] Figure 7 This is an exploded structural diagram of the peeling structure of the present invention;

[0028] Figure 8 This is a three-dimensional structural schematic diagram of the peeling assembly of the peeling structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the planar structure of the peeling assembly of the peeling structure of the present invention;

[0030] Figure 10 This is a partial structural schematic diagram of the peeling assembly of the peeling structure of the present invention;

[0031] Figure 11 This is a three-dimensional structural diagram of the label printer of the present invention.

[0032] The attached figures are labeled as follows:

[0033] 1. Peeling channel; 2. Driven roller; 3. Printing roller; 5. Peeling assembly; 6. First texture; 7. Second texture; 8. First biting tooth; 9. Second biting tooth; 10. Protrusion; 11. Groove; 12. Smooth surface; 13. Rough surface; 15. First protrusion; 16. Second protrusion; 17. Narrow end; 18. Wide end; 19. Peeling piece; 20. Fixed-distance pressure plate; 21. Peeling gap; 22. Equal-height boss; 23. Peeling mounting base; 25. First bushing; 26. Elastic element; 27. Label detection sensor; 28. Inclined paper guide; 29. ​​Second bushing; 30. Printing roller gear; 31. Printer body.

[0034] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention 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 the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0037] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0038] Example 1:

[0039] like Figure 1 and Figure 2 As shown, in this embodiment, the peeling structure includes a peeling channel 1, a driven roller 2, and a print head and a print roller 3 arranged opposite to each other. The print head and the print roller 3 are connected to the peeling channel 1. A peeling component 5 is provided at the end of the peeling channel 1. The driven roller 2 abuts against the print roller 3. The driven roller 2 is provided with a first texture 6, and the print roller 3 is provided with a second texture 7. The second texture 7 abuts against the first texture 6 when the print roller 3 rotates in a first direction, and disengages from the first texture 6 when the print roller 3 rotates in a second direction. The print roller 3 feeds paper when rotating in the first direction and retracts paper when rotating in the second direction, which is opposite to the first direction.

[0040] During peeling, the label paper is first printed between the print head and the printing roller 3. After printing, the label paper is peeled off by the peeling component 5 in the peeling channel 1 into a backing paper and a label. The relatively flexible label paper moves in a straight line along the length of the peeling channel 1, while the more rigid backing paper bends and changes direction along the edge of the peeling component 5, and then passes between the driven roller 2 and the printing roller 3 before exiting, thus completing the peeling of the printed label paper. During paper ejection, the printing roller 3 is reversed to pull the backing paper that has been conveyed forward a certain distance back, so that the next label paper returns to the printing starting point, thus starting the next printing.

[0041] In contrast to the shortcomings of existing technologies, in this invention, during peeling, the printing roller 3 rotates in a first direction, causing the driven roller 2, which abuts against the printing roller 3, to rotate together. During this process, the second texture 7 and the first texture 6 abut against each other, maximizing the friction between the two rollers and the base paper, thus maximizing the peeling traction force transferred to the base paper. The peeling action is stable and powerful, preventing the base paper from loosening during continuous peeling. During paper ejection, the printing roller 3 rotates in a second direction opposite to the first direction, causing the driven roller 2 to reverse direction. During this process, the second texture 7 and the first texture 6 disengage, minimizing the friction between the two rollers and the base paper. This prevents the printing roller 3 from experiencing excessive friction between the two rollers during paper ejection, which could cause the base paper to slip or loosen. This ensures that the label paper remains taut, guaranteeing a good peeling effect. Therefore, the peeling structure has the advantage of excellent peeling performance.

[0042] like Figure 2 and Figure 3 As shown, in this embodiment, the first texture 6 consists of multiple first engagement teeth 8 distributed on the driven rubber roller 2, and the second texture 7 consists of multiple second engagement teeth 9 distributed on the printing rubber roller 3. Both the first engagement teeth 8 and the second engagement teeth 9 are inclined. The tooth tip of the corresponding second engagement tooth 9 engages with the corresponding first engagement tooth 8 when the printing rubber roller 3 rotates in the first direction, and disengages from the corresponding first engagement tooth 8 when the printing rubber roller 3 rotates in the second direction. Specifically, during peeling, when the printing rubber roller 3 rotates in the first direction, the tooth tip of the corresponding second engagement tooth 9 can engage with the corresponding first engagement tooth 8, maximizing the friction between the two rollers and the base paper, and maximizing the peeling traction force transferred to the base paper; during paper ejection, when the printing rubber roller 3 rotates in the second direction, the tooth tip of the corresponding second engagement tooth 9 disengages from the corresponding first engagement tooth 8, minimizing the friction relative to the base paper.

[0043] As can be seen from the above, by setting the first biting tooth 8 and the second biting tooth 9 in this embodiment, sufficient traction force can be ensured during peeling to overcome the resistance during peeling, thereby effectively pulling the bottom paper, and keeping the bottom paper tight during peeling to prevent loosening; furthermore, the friction between the two rollers can be kept small during paper ejection without affecting the pull force of the printing roller 3 on the bottom paper, laying the foundation for the stability of the next peeling, so as to ensure the stability of the peeling process.

[0044] In this embodiment, the first texture 6 is evenly distributed on the driven rubber roller 2, and the second texture 7 is evenly distributed on the printing rubber roller 3. Specifically, during peeling, when the first texture 6 comes into contact with the second texture 7, both are in direct contact with the backing paper. Since the contact force between the first texture 6 and the second texture 7 is mainly a uniform pressing force perpendicular to the paper surface, and the texture is evenly distributed on the roller to disperse the pressure, it avoids excessive force on a single point of the backing paper, thereby preventing damage to the backing paper. During paper removal, since the first texture 6 and the second texture 7 are in a relatively detached state, the pressing force on the backing paper is greatly reduced, and the backing paper will not be damaged.

[0045] like Figures 7 to 10 As shown, in this embodiment, the peeling assembly 5 includes a peeling sheet 19 and a spacer plate 20. Both ends of the spacer plate 20 are fixedly connected to the peeling sheet 19. A peeling gap 21 is provided between the peeling sheet 19 and the spacer plate 20, and the peeling gap 21 is located in the peeling channel 1. Both ends of the spacer plate 20 are provided with equal-height bosses 22, and the bottoms of both equal-height bosses 22 are fixedly connected to the upper surface of the peeling sheet 19. The paper feed end of the spacer plate 20 is provided with an inclined paper guide portion 28. The bottom of the equal-height bosses 22 is fixedly connected to the peeling sheet 19 by screws. When the label paper passes through the peeling gap 21, because the end of the peeling sheet 19 has an edge bend, the more rigid backing paper will bend and change direction along this edge. Specifically, by setting the fixed-distance pressure plate 20 and the peeling gap 21, the backing paper and the label can be prevented from jumping in the peeling gap 21, thereby ensuring that the peeling angle is relatively constant. Even for printing consumables of different hardness, the label and the backing paper can be smoothly separated at the position of the peeling piece 19. Secondly, by setting equal-height bosses 22 at both ends of the fixed-distance pressure plate 20, the peeling gap 21 can be made uniform. In addition, by setting an inclined paper guide part 28 at the paper feeding end of the fixed-distance pressure plate 20, the printed label paper can easily enter the peeling gap 21.

[0046] like Figure 7 As shown, in this embodiment, the peeling structure further includes a peeling mounting base 23. The driven rubber roller 2 is rotatably connected to the peeling mounting base 23. Both ends of the driven rubber roller 2 are connected to first bushings 25. One end of the first bushing 25 abuts against an elastic element 26, and the other end of the elastic element 26 abuts against the peeling mounting base 23. Specifically, the first bushing 25 provides rotational support for the driven rubber roller 2, and the elastic element 26, which can be a spring, pushes the driven rubber roller 2, allowing it to tightly abut against the printing rubber roller 3 and balancing the gap and pressure between the driven rubber roller 2 and the printing rubber roller 3.

[0047] like Figure 1and Figure 7 As shown, in this embodiment, a label detection sensor 27 is provided on the peeling mounting base 23. The label detection sensor 27 is used to detect whether the label between the driven rubber roller 2 and the printing rubber roller 3 has been removed. Specifically, the label detection sensor 27 can detect whether the label between the driven rubber roller 2 and the printing rubber roller 3 has been removed, and the next label peeling operation can only be performed after the label has been removed.

[0048] like Figure 7 As shown, in this embodiment, both ends of the printing roller 3 are connected to second bushings 29, and one end of the printing roller 3 is connected to a printing roller gear 30. Specifically, the printing roller 3 is driven to rotate by a drive mechanism and the printing roller gear 30, which in turn drives the driven roller 2 to rotate, and the rotation directions of the printing roller 3 and the driven roller 2 are opposite.

[0049] Example 2:

[0050] The difference between this embodiment two and embodiment one is that the specific structures of the first texture 6 and the second texture 7 are different, as detailed below:

[0051] like Figure 4 As shown, in this embodiment, the first texture 6 is a plurality of protrusions 10 or a plurality of grooves 11 distributed on the driven rubber roller 2, and the second texture 7 is a plurality of grooves 11 or a plurality of protrusions 10 distributed on the printing rubber roller 3. The corresponding protrusions 10 can be embedded in the corresponding grooves 11. One side of each groove 11 is a smooth surface 12, and the other side is a rough surface 13. When the printing rubber roller 3 rotates in the first direction, the corresponding protrusions 10 are engaged in the corresponding grooves 11 and abut against the rough surface 13. When the printing rubber roller 3 rotates in the second direction, the corresponding protrusions 10 abut against the smooth surface 12. Specifically, when the first texture 6 is a protrusion 10, the second texture 7 is a groove 11; when the first texture 6 is a groove 11, the second texture 7 is a protrusion 10. Specifically, during peeling, when the printing roller 3 rotates in the first direction, the corresponding protrusion 10 is embedded in the corresponding groove 11 and abuts against the rough surface 13. Since the friction between the rough surface 13 and the protrusion 10 is large, it can slow down the speed at which the protrusion 10 leaves the groove 11, making the peeling action stable and powerful, maximizing the friction between the two rollers and the base paper, and maximizing the peeling traction force transferred to the base paper. During paper ejection, when the printing roller 3 rotates in the second direction, the corresponding protrusion 10 moves toward the smooth surface 12 on the other side and leaves the groove 11 through the smooth surface 12. Since the friction between the smooth surface 12 and the protrusion 10 is small, it can increase the speed at which the protrusion 10 leaves the groove 11, minimizing the friction relative to the base paper.

[0052] like Figure 4As shown, in some embodiments, the rough surface 13 is on a steeper side, while the smooth surface 12 is on a gentler side, so that the bump 10 can further increase friction when passing through the steeper rough surface 13, and further reduce friction when passing through the gentler smooth surface 12.

[0053] It should be noted that after the protrusion 10 on one of the rollers is disengaged from the slide groove 11, the protrusion 10 will not come into contact with the roller surface of the other roller, so as to avoid the two rollers getting stuck when the protrusion 10 comes into contact with the roller surface of the other roller.

[0054] As can be seen from the above, by setting the protrusion 10 and the groove 11 in this embodiment, sufficient traction force can be ensured during peeling to overcome the resistance during peeling, thereby effectively pulling the bottom paper, and keeping the bottom paper tight during peeling to prevent loosening; furthermore, the friction between the two rollers can be kept small during paper ejection without affecting the pull force of the printing roller 3 on the bottom paper, laying the foundation for the stability of the next peeling, so as to ensure the stability of the peeling process.

[0055] Example 3:

[0056] The difference between this embodiment three and embodiment one is that the specific structures of the first texture 6 and the second texture 7 are different, as detailed below:

[0057] like Figure 5 and Figure 6 As shown, in this embodiment, the first texture 6 is a plurality of first protrusions 15 distributed on the driven rubber roller 2, and the second texture 7 is a plurality of second protrusions 16 distributed on the printing rubber roller 3. Both the first protrusion 15 and the second protrusion 16 include a narrow end 17 and a wide end 18, and the area between the narrow end 17 and the wide end 18 gradually increases in the circumferential direction. Specifically, during peeling, when the printing roller 3 rotates in the first direction, the narrow end 17 of the corresponding second protrusion 16 first abuts against the narrow end 17 of the corresponding first protrusion 15. At this time, the contact area between the first protrusion 15 and the second protrusion 16 is small. As the printing roller 3 continues to rotate, the contact area between the two becomes larger and larger. When the wide end 18 of the corresponding second protrusion 16 abuts against the wide end 18 of the corresponding first protrusion 15, the contact area between the two reaches its maximum, thereby maximizing the friction between the two rollers and the base paper and maximizing the peeling traction force transferred to the base paper. During paper ejection, the printing roller 3 rotates in the second direction, causing the contact area between the first protrusion 15 and the second protrusion 16 to become smaller and smaller. When the narrow end 17 of the first protrusion 15 abuts against the narrow end 17 of the corresponding second protrusion 16, the contact area between the two reaches its minimum, thereby minimizing the friction relative to the base paper.

[0058] It should be noted that the size of the first protrusion 15 and the second protrusion 16 is not limited here. The first protrusion 15 and the second protrusion 16 can be set large enough so that the required frictional force is obtained even when the contact area between them has not reached the maximum or minimum.

[0059] As can be seen from the above, by setting the first protrusion 15 and the second protrusion 16 in this embodiment, sufficient traction force can be ensured during peeling to overcome the resistance during peeling, thereby effectively pulling the bottom paper, and keeping the bottom paper tight during peeling to prevent loosening; furthermore, the friction between the two rollers can be kept small during paper ejection without affecting the pull force of the printing roller 3 on the bottom paper, laying the foundation for the stability of the next peeling, so as to ensure the stability of the peeling process.

[0060] In this embodiment, the cross-sections of the first protrusion 15 and the second protrusion 16 are both curved, triangular, or trapezoidal. Specifically, the specific shapes of the first protrusion 15 and the second protrusion 16 can be any of these multiple shapes, as long as it ensures that the contact area of ​​the first protrusion 15 and the second protrusion 16 increases as the printing roller 3 rotates in the first direction. Of course, the first protrusion 15 and the second protrusion 16 can also be other shapes, which are also within the scope of the present invention.

[0061] In addition, such as Figure 11 As shown, the present invention also provides a label printer, which includes a printer body 31 and a peeling structure for preventing the backing paper from loosening, disposed on the printer body 31. Specifically, the specific structure of the peeling structure refers to the above embodiments. Since the label printer adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0062] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A peeling structure to prevent the backing paper from loosening, characterized in that: It includes a peeling channel (1), a driven rubber roller (2), and a print head and a printing rubber roller (3) arranged opposite to each other. The print head and the printing rubber roller (3) are connected to the peeling channel (1). A peeling component (5) is provided at the end of the peeling channel (1). The driven rubber roller (2) abuts against the printing rubber roller (3). The driven rubber roller (2) is provided with a first texture (6). The printing rubber roller (3) is provided with a second texture (7). The second texture (7) abuts against the first texture (6) when the printing rubber roller (3) rotates in a first direction. The second texture (7) disengages from the first texture (6) when the printing rubber roller (3) rotates in a second direction. When the printing roller (3) rotates in the first direction, the paper feeds; when it rotates in the second direction opposite to the first direction, the paper is ejected. During peeling, the label paper is first printed between the print head and the printing roller (3). After printing, the label paper is peeled into a backing paper and a label by the peeling component (5) in the peeling channel (1). The relatively soft label moves straight along the length of the peeling channel (1), while the more rigid backing paper bends and changes direction along the edge of the peeling component (5) and passes between the driven roller (2) and the printing roller (3) before exiting, thus completing the peeling of the printed label paper. During paper ejection, the printing roller (3) is reversed to pull the backing paper that has been conveyed forward a certain distance back, so that the next label paper returns to the printing starting point, thus starting the next printing.

2. The peeling structure for preventing the backing paper from loosening according to claim 1, characterized in that: The first texture (6) consists of a plurality of first engagement teeth (8) distributed on the driven rubber roller (2), and the second texture (7) consists of a plurality of second engagement teeth (9) distributed on the printing rubber roller (3). The first engagement teeth (8) and the second engagement teeth (9) are both inclined. When the printing rubber roller (3) rotates in the first direction, the tooth tip of the corresponding second engagement tooth (9) engages with the corresponding first engagement tooth (8). When the printing rubber roller (3) rotates in the second direction, the tooth tip of the corresponding second engagement tooth (9) disengages from the corresponding first engagement tooth (8).

3. The peeling structure for preventing the backing paper from loosening according to claim 1, characterized in that: The first texture (6) is a plurality of protrusions (10) or a plurality of grooves (11) distributed on the driven rubber roller (2). The second texture (7) is a plurality of grooves (11) or a plurality of protrusions (10) distributed on the printing rubber roller (3). The corresponding protrusions (10) can be embedded in the corresponding grooves (11). One side of the groove (11) is a smooth surface (12) and the other side is a rough surface (13). When the printing rubber roller (3) rotates in the first direction, the corresponding protrusions (10) are engaged in the corresponding grooves (11) and abut against the rough surface (13). When the printing rubber roller (3) rotates in the second direction, the corresponding protrusions (10) abut against the smooth surface (12).

4. The peeling structure for preventing the backing paper from loosening according to claim 1, characterized in that: The first texture (6) consists of a plurality of first protrusions (15) distributed on the driven rubber roller (2), and the second texture (7) consists of a plurality of second protrusions (16) distributed on the printing rubber roller (3). Both the first protrusion (15) and the second protrusion (16) include a narrow end (17) and a wide end (18), and the area between the narrow end (17) and the wide end (18) gradually increases in the circumferential direction.

5. The peeling structure for preventing the backing paper from loosening according to claim 4, characterized in that: The cross-sections of the first protrusion (15) and the second protrusion (16) are both curved, triangular or trapezoidal.

6. A peeling structure for preventing the backing paper from loosening according to any one of claims 2-4, characterized in that: The first texture (6) is evenly distributed on the driven rubber roller (2), and the second texture (7) is evenly distributed on the printing rubber roller (3).

7. The peeling structure for preventing the backing paper from loosening according to claim 1, characterized in that: The peeling assembly (5) includes a peeling sheet (19) and a spacer plate (20). The two ends of the spacer plate (20) are fixedly connected to the peeling sheet (19). A peeling gap (21) is provided between the peeling sheet (19) and the spacer plate (20). The peeling gap (21) is located in the peeling channel (1).

8. The peeling structure for preventing the backing paper from loosening according to claim 7, characterized in that: Both ends of the fixed-distance pressure plate (20) are provided with equal-height bosses (22), and the bottoms of the two equal-height bosses (22) are fixedly connected to the upper surface of the peeling sheet (19).

9. The peeling structure for preventing the backing paper from loosening according to claim 7, characterized in that: The paper feed end of the fixed-distance pressure plate (20) is provided with an inclined paper guide (28).

10. The peeling structure for preventing the backing paper from loosening according to claim 1, characterized in that: The peeling structure further includes a peeling mounting base (23), the driven rubber roller (2) is rotatably connected to the peeling mounting base (23), and both ends of the driven rubber roller (2) are connected to a first bushing (25). The first bushing (25) abuts against one end of the elastic element (26), and the other end of the elastic element (26) abuts against the peeling mounting base (23).

11. The peeling structure for preventing the backing paper from loosening according to claim 10, characterized in that: The peeling mounting base (23) is equipped with a label detection sensor (27), which is used to detect whether the label between the driven rubber roller (2) and the printing rubber roller (3) has been removed.

12. The peeling structure for preventing the backing paper from loosening according to claim 7, characterized in that: The printing roller (3) is connected to a second bushing (29) at both ends, and a printing roller gear (30) is connected to one end of the printing roller (3).

13. A label printer, characterized in that: It includes a printer body (31) and a peeling structure provided on the printer body (31) as described in any one of claims 1-12 to prevent the backing paper from loosening.

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