Wire marking tube printer

Abstract

The utility model discloses a wire marking tube printer which comprises a thermal transfer ribbon and a printing assembly, the printing assembly comprises a mounting base and a printing head, the printing head is mounted on the mounting base, the printing head is provided with an abutting face deviating from the mounting base, and the abutting face is configured to abut against the thermal transfer ribbon and is used for abutting against the thermal transfer ribbon in the conveying direction of the thermal transfer ribbon. The abutting surface is provided with a first edge and a second edge which are arranged in sequence; wherein the mounting seat is provided with a plurality of convex parts which are convexly arranged along the first direction, and the convex parts are propped against the thermal transfer ribbon, so that the acting force of the first edge and / or the second edge on the thermal transfer ribbon is reduced; the first direction is perpendicular to the abutting surface. The problem that the thermal transfer ribbon is broken in the using process of the wire marking tube printer can be solved.

Description

Technical Field

[0001] This application relates to the field of wire marking tube printing technology, and more particularly to a wire marking tube printer. Background Technology

[0002] In related technologies, wire marking tube printers apply pressure to the ribbon through the print head, pressing the ribbon against the wire marking tube to achieve printing on the wire marking tube.

[0003] However, current wire marking printers are prone to ribbon breakage issues during use. Summary of the Invention

[0004] This application provides a wire marking tube printer to improve the problem of ribbon breakage during the use of wire marking tube printers in related technologies.

[0005] In a first aspect, embodiments of this application provide a wire marking printer, including a ribbon and a printing assembly. The printing assembly includes a mounting base and a print head. The print head is mounted on the mounting base and has an abutment surface facing away from the mounting base. The abutment surface is configured to abut the ribbon. Along the conveying direction of the ribbon, the abutment surface has a first edge and a second edge arranged sequentially. The mounting base is provided with a plurality of protrusions protruding along a first direction. The protrusions abut against the ribbon to reduce the force exerted on the ribbon by the first edge and / or the second edge. The first direction is perpendicular to the abutment surface.

[0006] In some embodiments, a plurality of the protrusions include a first boss protruding along the first direction, the first boss being higher than the abutment surface in the first direction, the first boss abutting against the carbon ribbon such that the first edge is spaced apart from the carbon ribbon.

[0007] In some embodiments, the end of the first boss facing away from the mounting base has a curved chamfer.

[0008] In some embodiments, the first boss is located at one end of the mounting base in a second direction, which is parallel to the conveying direction of the ribbon.

[0009] In some embodiments, the printhead includes a main body and a heating element, the heating element being disposed on the side of the main body opposite to the mounting base; a portion of the ribbon contacts the protrusion, and another portion contacts the heating element.

[0010] In some embodiments, the mounting base has an extension at one end in the conveying direction of the ribbon, the extension extending along a second direction parallel to the conveying direction of the ribbon; the extension abuts against the ribbon to reduce the force exerted on the ribbon by the second edge.

[0011] In some embodiments, the orthographic projection of the extension onto the plane containing the abutment surface does not overlap with the abutment surface.

[0012] In some embodiments, the extension length is greater than or equal to 1 cm and less than or equal to 3 cm.

[0013] In some embodiments, the edge of the extension away from the printhead has a curved chamfer. In some embodiments, the plurality of protrusions includes a second protrusion projecting along the first direction, the second protrusion abutting against the ribbon, and the second protrusion being lower than or flush with the abutting surface in the first direction.

[0014] In some embodiments, the height of the second boss along the first direction is lower than the abutment surface by a preset distance, the preset distance being 0.5mm-2mm.

[0015] In some embodiments, the second boss has a first orthographic projection area on the plane where the abutment surface is located, and the mounting base has a second orthographic projection area on the plane where the abutment surface is located; the distance between the end of the first orthographic projection area away from the abutment surface and the end of the second orthographic projection area away from the abutment surface is greater than the distance between the end of the first orthographic projection area close to the abutment surface and the abutment surface.

[0016] In some embodiments, the protrusion includes a first surface and a second surface, the first surface being parallel to the abutment surface, and one side of the second surface connecting to the first surface and the other side connecting to the surface of the mounting base; wherein the angle between the plane containing the second surface and the plane containing the first surface is an acute angle. In some embodiments, a chamfered surface is provided at the junction between the first surface and the second surface. In some embodiments, the second surface includes a plurality of sequentially connected sub-surfaces, the plurality of sub-surfaces being configured to convex outward relative to the surface of the extension.

[0017] In some embodiments, a curved chamfer is provided at the junction between any two adjacent sub-surfaces. In some embodiments, the sub-surface is constructed as a plane or a curved surface that convex outwards relative to the surface of the extension.

[0018] The wire marking printer of this application embodiment provides several protrusions along a first direction on the mounting base for the print head, and sets the protrusions to abut against the ribbon, thereby reducing the force exerted by the edge of the print head on the ribbon. This ensures that the ribbon can contact the print head to achieve the printing function, while preventing the ribbon from being cut by the edge of the print head, thus improving the problem of ribbon breakage. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of a wire marking tube printer according to one embodiment of this application is shown.

[0021] Figure 2 A schematic diagram of the printing component structure is shown in one embodiment of this application.

[0022] Figure 3 A top view of the printing component structure in one embodiment of this application is shown.

[0023] Figure 4 It shows Figure 3 A magnified view of a portion of point A in the middle.

[0024] Figure 5 A detailed diagram of the printing component in one embodiment of this application is shown.

[0025] Figure 6 A schematic diagram showing the relative positional relationship between the printing component and the ribbon in one embodiment of this application is shown.

[0026] Figure 7 A detailed view of another perspective of the printing component in one embodiment of this application is shown.

[0027] Figure 8 A detailed view of the printing component in one embodiment of this application is shown.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Wire marking tube printer; 2. Wire marking tube;

[0030] 10. Carbon ribbon;

[0031] 20. Printing assembly; 21. Mounting base; 21b. Extension; 211. Protrusion; 211a. First surface; 211b. Second surface; 2111. First boss; 2112. Second boss; H. Preset distance; 22. Print head; 221. Abutting surface; 221a. First edge; 221b. Second edge; 22a. Main body; 22b. Heating element; 23. Printing roller;

[0032] 30. Mounting plate;

[0033] 40. Circuit board;

[0034] X, the first direction; Y, the second direction. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0036] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0037] In related technologies, wire marking printers apply pressure to the ribbon through the print head, pressing the ribbon against the wire marking tube to print the markings. However, in practical applications, ribbon breakage is a common problem. The inventors of this application investigated this issue and discovered that the edge of the print head exerts a significant force on the ribbon during printing, easily causing wear and tear, leading to ribbon breakage.

[0038] To address the aforementioned issues, this application provides a wire marking tube printer. By providing a plurality of protrusions along a first direction on the mounting base for the print head, and by setting the protrusions to abut against the ribbon, the force exerted by the edge of the print head on the ribbon is reduced. This ensures that the ribbon can contact the print head to achieve the printing function while preventing the ribbon from being cut by the edge of the print head, thus improving the problem of ribbon breakage.

[0039] See Figures 1 to 4 In one embodiment of this application, the wire marking tube printer 1 includes a ribbon 10 and a printing assembly 20. The printing assembly 20 applies a pressure to the ribbon 10, pressing the ribbon 10 against the wire marking tube 2 to achieve printing on the wire marking tube 2.

[0040] The printing assembly 20 includes a mounting base 21 and a printhead 22. The mounting base 21 can be a regular plate, block, column, or irregular shape. Exemplarily, the mounting base 21 includes a mounting portion and a fixing portion, which are connected, for example, integrally formed. Both the mounting portion and the fixing portion are plate-shaped, and their combination forms an L-shape. The fixing portion has fixing holes, allowing the mounting base 21 to be fixed to other components by engaging screws, bolts, or other fasteners in the fixing holes. Furthermore, to enhance the structural strength of the mounting base 21, one or more reinforcing ribs are provided at the connection between the mounting portion and the fixing portion.

[0041] Further reading Figure 5 and Figure 6 The printhead 22 is mounted on the mounting base 21, for example, on the mounting portion of an L-shaped mounting base 21. The printhead 22 has an abutment surface 221 facing away from the mounting base 21, which can be flat or curved. The abutment surface 221 is configured to abut against the ribbon 10. It should be noted that the abutment surface 221 abutting against the ribbon 10 includes the abutment surface 221 directly contacting the ribbon 10 to generate an abutment action, and the abutment surface 221 having other components on it, and the abutment surface 221 exerting a force on these components, such as a supporting force, thereby indirectly abutting against the ribbon 10.

[0042] Combination Figure 4 and Figure 6 Along the conveying direction of the ribbon 10, the contact surface 221 has a first edge 221a and a second edge 221b arranged sequentially. Exemplarily, the print head 22 is a rectangular flat structure, such as a sheet of glass or sheet of plexiglass. During printing, the ribbon 10 is drawn to the print head 22, and the print head 22, in conjunction with the printing roller 23, clamps the ribbon 10 and the wire tube 2, thereby achieving printing on the wire tube 2.

[0043] In related technologies, the contact between the carbon ribbon 10 and the contact surface 221 includes contact between the carbon ribbon 10 and the central region of the contact surface 221, as well as contact between the carbon ribbon 10 and the edge of the contact surface 221. When the carbon ribbon 10 contacts the edge of the contact surface 221, the edge is sharper than the central region, making the carbon ribbon 10 more susceptible to wear and tear, thus increasing the risk of ribbon breakage.

[0044] In this embodiment, the mounting base 21 has several protrusions 211 extending along a first direction X, wherein the first direction X is perpendicular to the contact surface 221. The protrusions 211 abut against the ribbon 10 to reduce the force exerted on the ribbon 10 by at least one of the first edge 221a and the second edge 221b. Thus, while ensuring that the ribbon 10 can contact the print head 22 to achieve the printing function, the ribbon 10 can be prevented from being cut by the edge of the print head 22, improving the problem of ribbon breakage.

[0045] Combination Figures 1 to 4Optionally, the printing assembly 20 also includes a printing roller 23 and a mounting plate 30. The printing roller 23 and the print head 22 are spaced apart and mounted on the mounting plate 30, forming a printing channel between the printing roller 23 and the print head 22 for the ribbon 10 and the wire tube 2 to pass through. During printing, the printing roller 23 and the print head 22 exert force on the ribbon 10 and the wire tube 2 in the printing channel, thereby printing the wire tube 2. Optionally, the wire tube printer 1 also includes a main unit and a cover. The cover is rotatably connected to the main unit. When the cover is closed, the ribbon 10 and the printing assembly 20 are hidden in the receiving space formed between the cover and the main unit, thereby protecting the ribbon 10 and the printing assembly 20.

[0046] Combination Figure 5 and Figure 6 In some embodiments, the plurality of protrusions 211 include a first boss 2111 protruding along a first direction X. The first boss 2111 is higher than the abutment surface 221 in the first direction X. The first boss 2111 abuts against the ribbon 10, such that the first edge 221a is spaced apart from the ribbon 10. In this way, there is no interaction force between the ribbon 10 and the first edge 221a of the print head 22. At the same time, due to the buffering effect of the first boss 2111, the interaction force between the ribbon 10 and the second edge 221b of the print head 22 is reduced, thereby reducing the risk of ribbon 10 breakage.

[0047] See Figure 7 and Figure 8 Optionally, the first protrusion 2111 is elongated, and its longitudinal extension direction is perpendicular to the conveying direction of the ribbon 10. Further, along its longitudinal extension direction, the length of the first protrusion 2111 is greater than the length of the printhead 22. Further, along its longitudinal extension direction, the length of the first protrusion 2111 is equal to the length of the mounting base 21. Thus, when the ribbon 10 deviates from the central axis of the printhead 22, the first protrusion 2111 can still abut against the ribbon 10.

[0048] Optionally, the first boss 2111 is integrally formed with the mounting base 21, thereby simplifying the manufacturing process.

[0049] In some embodiments, the end of the first boss 2111 facing away from the mounting base 21 is provided with a curved chamfer, such as a rounded chamfer. This reduces the interaction force between the first boss 2111 and the carbon ribbon 10, thereby further reducing the risk of the carbon ribbon 10 breaking.

[0050] In some embodiments, the first boss 2111 is located at one end of the mounting base 21 in a second direction Y, which is parallel to the conveying direction of the ribbon 10. Thus, the first boss 2111 avoids the middle region of the mounting base 21, fully utilizing the end space of the mounting base 21 and preventing obstruction of the printhead 22's placement. Figures 6 to 8 In some embodiments, the printhead 22 includes a main body 22a and a heating element 22b, the heating element 22b being disposed on the side of the main body 22a opposite to the mounting base 21. A portion of the ribbon 10 contacts the protrusion 211, and another portion contacts the heating element 22b. Therefore, during printing, the ribbon 10 conveyed to the printhead 22 can be heated, achieving heating and transfer of the ribbon 10.

[0051] Optionally, the heating element 22b has a sheet-like structure. Further, the heating element 22b completely covers the surface of the main body 22a opposite to the mounting base 21. This increases the heating area and improves the heating effect. Optionally, one end of the heating element 22b is connected to a circuit board 40, such as a flexible circuit board, so that the start and end times of heating can be controlled by the control circuit on the circuit board 40.

[0052] Optionally, the circuit board 40 and the print head 22 do not overlap, thereby avoiding interference between the installation of the circuit board 40 and the print head 22.

[0053] In some embodiments, the mounting base 21 has an extension 21b at one end in the conveying direction of the ribbon 10. The extension 21b extends along a second direction Y, which is parallel to the conveying direction of the ribbon 10. The extension 21b abuts against the ribbon 10 to reduce the force exerted on the ribbon 10 by the second edge 221b. Therefore, when the ribbon 10 is bent at the printhead 22, i.e., when the conveying path of the ribbon 10 is not straight, the force exerted on the ribbon 10 by the second edge 221b is smaller due to the buffering effect of the extension 21b.

[0054] In some embodiments, the orthographic projection of the extension 21b onto the plane of the contact surface 221 does not overlap with the contact surface 221, that is, the area of ​​the area on the mounting base 21 where the extension 21b is not provided is greater than or equal to the area of ​​the contact surface 221, thereby maximizing the support area of ​​the mounting base 21 on the print head 22, so that the support force from the mounting base 21 on the print head 22 during the printing process is evenly distributed.

[0055] In some embodiments, the extension length of the extension 21b is greater than or equal to 1 cm and less than or equal to 3 cm. For example, the extension length of the extension 21b is 1.2 cm, 1.5 cm, or 2 cm. In this way, the mounting base 21 can be kept in a small overall volume while the carbon ribbon 10 is subjected to a smaller force.

[0056] In some embodiments, the edge of the extension 21b away from the print head 22 is provided with a curved chamfer, thereby further reducing the force exerted on the ribbon 10 by the side where the extension 21b is located.

[0057] See Figure 5 and Figure 6 In some embodiments, the plurality of protrusions 211 include a second protrusion 2112 protruding along a first direction X. The second protrusion 2112 abuts against the ribbon 10, and the second protrusion 2112 is lower than or flush with the abutment surface 221 in the first direction X. In this way, the second protrusion 2112 can reduce the force between the ribbon 10 and the edge of the printhead 22, while avoiding obstruction of contact between the ribbon 10 and the printhead 22, such as the heating element 22b of the printhead 22.

[0058] Optionally, the second protrusion 2112 is elongated, and its longitudinal extension direction is perpendicular to the conveying direction of the ribbon 10. Furthermore, along its longitudinal extension direction, the length of the second protrusion 2112 is greater than the length of the printhead 22. Thus, when the ribbon 10 deviates from the central axis of the printhead 22, the second protrusion 2112 can still abut against the ribbon 10.

[0059] In some embodiments, the height of the second boss 2112 along the first direction X is lower than the abutment surface 221 by a preset distance H, where the preset distance H is 0.5mm-2mm. For example, the preset distance H is 0.6mm, 1mm, or 1.5mm. Based on this, the second boss 2112 can play a good buffering role, reducing the force between the ribbon 10 and the edge of the printhead 22, or preventing the ribbon 10 from directly contacting the edge of the printhead 22, while also preventing obstruction of contact between the ribbon 10 and the heating element 22b of the printhead 22.

[0060] In some embodiments, the second boss 2112 has a first orthographic projection area on the plane of the abutment surface 221, and the mounting base 21 has a second orthographic projection area on the plane of the abutment surface 221. The distance between the end of the first orthographic projection area away from the abutment surface 221 and the end of the second orthographic projection area away from the abutment surface 221 is greater than the distance between the end of the first orthographic projection area closer to the abutment surface 221 and the abutment surface 221. In other words, the second boss 2112 is located closer to the printhead 22 on the mounting base 21. Thus, the gap between the second boss 2112 and the printhead 22 is smaller, thereby more effectively reducing the force between the ribbon 10 and the edge of the printhead 22.

[0061] Optionally, the mounting base 21 has an extension 21b at one end in the conveying direction of the ribbon 10. The extension 21b extends along a second direction Y, which is parallel to the conveying direction of the ribbon 10. A second boss 2112 is provided in the extension 21b and abuts against the ribbon 10. Based on this, the second boss 2112 can reduce the force between the ribbon 10 and the edge of the printhead 22, while avoiding obstruction of contact between the ribbon 10 and the printhead 22, such as the heating element 22b of the printhead 22.

[0062] Combination Figure 6 and Figure 8 In some embodiments, the protrusion 211 includes a first surface 211a and a second surface 211b. The first surface 211a is parallel to the abutment surface 221, and one side of the second surface 211b connects to the first surface 211a, while the other side connects to the surface of the mounting base 21. The angle between the plane containing the second surface 211b and the plane containing the first surface 211a is an acute angle. For example, the angle between the plane containing the second surface 211b and the plane containing the first surface 211a is 30°, 45°, or 60°. This allows the protrusion to more smoothly pull the carbon ribbon 10, thereby reducing the risk of the carbon ribbon 10 breaking.

[0063] In some embodiments, a curved chamfer, such as a rounded chamfer, is provided at the junction between the first surface 211a and the second surface 211b, thereby further making the transition of the carbon ribbon 10 smoother.

[0064] In some embodiments, the second surface 211b includes a plurality of sequentially connected sub-surfaces, which are configured to bulge outward relative to the surface of the extension 21b. The number of sub-surfaces can specifically be two, three, or more. Based on this, the boss can more smoothly pull the carbon ribbon 10, thereby reducing the risk of the carbon ribbon 10 breaking.

[0065] In some embodiments, a curved chamfer is provided at the junction between any two adjacent sub-surfaces, thereby further reducing the risk of carbon ribbon 10 breaking.

[0066] In some embodiments, the sub-surface is constructed as a plane or a curved surface that convexes outward relative to the surface of the extension 21b. This ensures a smooth transition of the carbon ribbon 10 while increasing the selectivity of the forming process for the boss.

[0067] See Figures 1 to 8In one exemplary embodiment, the wire marking tube printer 1 includes a ribbon 10 and a printing assembly 20. The printing assembly 20 includes a mounting base 21 and a print head 22. The print head 22 applies pressure to the ribbon 10, pressing the ribbon 10 against the wire marking tube 2 to achieve printing on the wire marking tube 2. The mounting base 21 is provided with a first boss 2111 and a second boss 2112 protruding along a first direction X. The first boss 2111 and the second boss 2112 are respectively located at both ends of the mounting base 21 along the ribbon 10 conveying direction. The first boss 2111 is higher than the contact surface 221 of the print head 22 in the first direction X, and the second boss 2112 is lower than or flush with the contact surface 221 in the first direction X.

[0068] Based on this, the first boss 2111 abuts against the ribbon 10, ensuring that the edge of the printhead 22 near the first boss 2111 does not contact the ribbon 10, thus preventing that edge from exerting force on the ribbon 10 and reducing the risk of ribbon breakage. Simultaneously, the second boss 2112 abuts against the ribbon 10, reducing the force between the ribbon 10 and the edge of the printhead 22 near the second boss 2112, while also preventing obstruction of contact between the ribbon 10 and the printhead 22, such as the heating element 22b, further reducing the risk of ribbon breakage.

[0069] See Figures 1 to 8 In another exemplary embodiment, the wire marking tube printer 1 includes a ribbon 10 and a printing assembly 20. The printing assembly 20 includes a mounting base 21 and a print head 22. The print head 22 applies pressure to the ribbon 10, pressing the ribbon 10 against the wire marking tube 2 to achieve printing on the wire marking tube 2. An extension 21b is provided at one end of the mounting base 21 in the conveying direction of the ribbon 10, and the extension 21b extends in a direction parallel to the conveying direction of the ribbon 10. The mounting base 21 also has a first boss 2111 and a second boss 2112 protruding along a first direction X. The first boss 2111 and the second boss 2112 are respectively located at both ends of the mounting base 21 in the conveying direction of the ribbon 10, and the second boss 2112 is located in the extension 21b. The first boss 2111 is higher than the contact surface 221 of the print head 22 in the first direction X, and the second boss 2112 is lower than or flush with the contact surface 221 in the first direction X.

[0070] Based on this, the first boss 2111 abuts against the ribbon 10, preventing the edge of the printhead 22 near the first boss 2111 from contacting the ribbon 10, thus avoiding the edge exerting force on the ribbon 10 and reducing the risk of ribbon breakage. Simultaneously, the second boss 2112 abuts against the ribbon 10, reducing the force between the ribbon 10 and the edge of the printhead 22 near the second boss 2112, while also preventing obstruction of contact between the ribbon 10 and the printhead 22, such as the heating element 22b, further reducing the risk of ribbon breakage. Furthermore, since the second boss 2112 is located in the extension 21b, the bending degree of the ribbon 10 when passing over the second boss 2112 is smaller, further reducing the risk of breakage.

[0071] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" means at least two, for example, two, three, four, etc. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0072] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A wire marking tube printer, characterized in that, include: Carbon ribbon; as well as A printing assembly includes a mounting base and a printhead, the printhead being mounted on the mounting base and having an abutment surface facing away from the mounting base, the abutment surface being configured to abut against the ribbon, and having a first edge and a second edge sequentially arranged along the conveying direction of the ribbon; The mounting base is provided with a plurality of protrusions extending along a first direction, which abut against the carbon ribbon to reduce the force exerted on the carbon ribbon by the first edge and / or the second edge; the first direction is perpendicular to the abutment surface.

2. The wire marking tube printer according to claim 1, characterized in that, The plurality of protrusions include a first protrusion protruding along the first direction, the first protrusion being higher than the abutment surface in the first direction, the first protrusion abutting against the carbon ribbon such that the first edge is spaced apart from the carbon ribbon.

3. The wire marking tube printer according to claim 2, characterized in that, The end of the first boss facing away from the mounting base has a curved chamfer.

4. The wire marking tube printer according to claim 2, characterized in that, The first boss is located at one end of the mounting base in a second direction, which is parallel to the conveying direction of the carbon ribbon.

5. The wire marking tube printer according to claim 1, characterized in that, The printhead includes a main body and a heating element, the heating element being located on the side of the main body opposite to the mounting base; A portion of the carbon ribbon is in contact with the protrusion, and another portion is in contact with the heating element.

6. The wire marking tube printer according to claim 1, characterized in that, The mounting base has an extension at one end in the conveying direction of the ribbon, and the extension extends along a second direction, which is parallel to the conveying direction of the ribbon. The extension abuts against the carbon ribbon to reduce the force exerted by the second edge on the carbon ribbon.

7. The wire marking tube printer according to claim 6, characterized in that, The orthographic projection of the extension on the plane of the contact surface does not overlap with the contact surface.

8. The wire marking tube printer according to claim 6, characterized in that, The extension length of the extension portion is greater than or equal to 1 cm and less than or equal to 3 cm.

9. The wire marking tube printer according to claim 6, characterized in that, The edge of the extension away from the print head has a curved chamfer.

10. The wire marking tube printer according to claim 1, characterized in that, The plurality of protrusions include a second protrusion protruding along the first direction, the second protrusion abutting against the carbon ribbon, and the second protrusion being lower than or flush with the abutting surface in the first direction.

11. The wire marking tube printer according to claim 10, characterized in that, The height of the second protrusion along the first direction is lower than the abutment surface by a preset distance, which is 0.5mm-2mm.

12. The wire marking tube printer according to claim 10, characterized in that, The second protrusion has a first orthographic projection area on the plane where the abutment surface is located, and the mounting base has a second orthographic projection area on the plane where the abutment surface is located; The distance between the end of the first orthographic projection area furthest from the abutting surface and the end of the second orthographic projection area furthest from the abutting surface is greater than the distance between the end of the first orthographic projection area closest to the abutting surface and the abutting surface.

13. The wire marking tube printer according to claim 1, characterized in that, The protrusion includes a first surface and a second surface. The first surface is parallel to the abutment surface. One side of the second surface is connected to the first surface, and the other side is connected to the surface of the mounting base. The angle between the plane containing the second surface and the plane containing the first surface is an acute angle.

14. The wire marking tube printer according to claim 13, characterized in that, A curved chamfer is provided at the junction between the first surface and the second surface.

15. The wire marking tube printer according to claim 13, characterized in that, The second surface includes a plurality of sequentially connected sub-surfaces, the plurality of sub-surfaces being configured to convex outward relative to the extension.

16. The wire marking tube printer according to claim 15, characterized in that, A curved chamfer is provided at the boundary between any two adjacent sub-surfaces.

17. The wire marking tube printer according to claim 15, characterized in that, The sub-surface is constructed as a plane or a curved surface that convexes outward relative to the surface of the extension.

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