Printing support

Abstract

The printing support comprises a front portion and a rear portion which are oppositely arranged in the front-back direction of the printing support. The front part is used for supporting a printer and is provided with a printer position and a printer supporting part positioned below the printer position; the rear part is used for supporting paper rolls, the rear part is provided with at least two paper roll positions and two shaft supporting structures which are arranged corresponding to the paper roll positions and are opposite in the transverse direction of the printing support, and the multiple paper roll positions comprise the first paper roll position close to the printer position; the paper feeding mechanism further comprises a first paper guide rod which is arranged between the first paper roll position and the printer position on the paper feeding path. The lower side of the first paper guide rod is lower than the axis of the first paper roll position, the bottom of the printer position is higher than the lower side of the first paper guide rod, and a paper feeding path of the printing support passes through the lower side of the first paper guide rod. The printing support special for the coiled material type tattoo paper solves the problem of wrinkles, and improves the printing effect.

Description

Technical Field

[0001] This utility model relates to the technical field of printing equipment accessories, specifically to a printing bracket. Background Technology

[0002] Existing roll-type tattoo paper consists of two rolls: transfer paper and base paper.

[0003] See Figure 1 and Figure 2 There is a base paper roll 991 that supports tattoo paper consumables and a transfer paper roll 992, as well as a printing bracket that simultaneously supports a printer 993 to assist in completing the printing process. Figure 1 and Figure 2 In this diagram, the x-axis represents the horizontal direction of the printing stand, which is also the axial direction of the tattoo paper consumable roll; the y-axis represents the front-to-back direction of the printing stand; and the z-axis represents the vertical direction of the printing stand. The printing stand includes two side support plates 92, two support plates 93, a connecting plate 94, a paper guide rod 95, and four paper roll holders 96. The support plates 93 and connecting plate 94 serve as base plates. The two side support plates 92 are respectively located on the left and right sides of the printing stand, with their rear bottoms connected to the horizontal sides of the connecting plate 94. The two side support plates 92 extend along the front-to-back direction of the printing stand. The two support plates 93 are respectively connected to the front bottoms of the two side support plates 92 and extend forward beyond them. At the front part 9108 of the printing stand, between the forward extensions of the two support plates 93, a printer position 9103 is formed for placing the printer 993. The rear part 9109 of the printer holder forms a first paper roll position 9101 and a second paper roll position 9102 arranged in the front-to-back direction. Both the first paper roll position 9101 and the second paper roll position 9102 are formed between the shaft mounting holes 921 of the two side support plates 92. After the paper roll holders 96 are inserted into both sides of the bottom paper roll 991 in the axial direction, the short shafts 961 of the two paper roll holders 96 at both ends of the bottom paper roll 991 are respectively inserted downward into the shaft mounting holes 921 of the two side support plates 92 to complete the support installation of the bottom paper roll 991. The support installation of the transfer paper roll 992 is the same. In addition, the paper guide rod 95 is inserted transversely between the two side support plates 92, and the paper guide rod 95 is located between the printer position 9103 and the first paper roll position 9101. After the lead-out section of the base paper roll 991 and the lead-out section of the transfer paper roll 992 are overlapped, and after passing over the upper side of the paper guide bar 95, they extend downward at an angle and enter the printing inlet of the printer 993. The completed tattoo paper is then fed out from the front of the printing bracket (in front of the positive y-axis direction in the figure).

[0004] However, when the printer and tattoo paper roll are supported by the existing printing stand and printed, the finished tattoo paper has a wrinkling problem. Utility Model Content

[0005] The purpose of this invention is to provide a printing stand that solves the problem of wrinkles in roll-type tattoo paper.

[0006] The printer holder provided by this utility model includes a front part and a rear part arranged opposite to each other in the front-rear direction of the printer holder; the front part is used to support the printer, and the front part is provided with a printer position and a printer support part located below the printer position; the rear part is used to support the paper roll, and the rear part is provided with at least two paper roll positions and two axial support structures arranged opposite to each paper roll position in the lateral direction of the printer holder, the multiple paper roll positions including a first paper roll position close to the printer position; a first paper guide rod is arranged on the paper path of the printer holder between the first paper roll position and the printer position; the lower side of the first paper guide rod is lower than the axis of the first paper roll position, the bottom of the printer position is higher than the lower side of the first paper guide rod, and the paper path of the printer holder passes through the lower side of the first paper guide rod.

[0007] As can be seen from the above solution, research has found that due to the unreasonable relative positions of the first paper roll position, the paper guide rod, and the printer position in the existing printing holder, the tattoo paper's wrap angle as it passes the paper guide rod is small, resulting in insufficient tension and subsequent wrinkles. Therefore, this invention adjusts the relative positions of the first paper roll position, the paper guide rod, and the printer position. In the first paper roll position, the paper tape is led out from the top of the roll, descends, bypasses the lower side of the first paper guide rod, rises again, and finally enters the inlet side of the printer position. The paper path is more curved, the wrap angle of the tattoo paper as it passes the first paper guide rod is larger, thus increasing the tension of the tattoo paper as it passes the first paper guide rod and the pressure between the tattoo paper and the first paper guide rod. This results in a better leveling effect from the first paper guide rod, thereby solving the problem of wrinkles in the tattoo paper.

[0008] A further proposed solution is to position the first paper guide bar below the printer position.

[0009] As can be seen from the above, on the one hand, this setting makes the paper path more curved, and the tattoo paper has a larger wrap angle and more tension after passing through the first paper guide rod. On the other hand, the guide rod and the printer position are arranged vertically, reducing the plane size of the printing bracket, but the increase in height is not significant. This design improves the overall size ratio of the product, making it more compact and smaller in volume.

[0010] A further solution includes a second paper guide rod; in the front-to-back direction, the second paper guide rod is positioned between the first paper roll position and the first paper guide rod; the upper side of the second paper guide rod is higher than the axis of the first paper roll position, and the paper path of the printing bracket first passes the upper side of the second paper guide rod and then passes the lower side of the first paper guide rod.

[0011] As can be seen from the above, the addition of the second paper guide bar increases the tension of the tattoo paper by bending it once at the second paper guide bar; and the second paper guide bar is closer to the printer position than the first paper roll, which makes the wrap angle of the tattoo paper as it passes the first paper guide bar larger, and the increase in the tension of the tattoo paper is more significant.

[0012] A further proposed solution is that the printer position includes an inlet side and an outlet side arranged opposite each other in the front-to-back direction, with the outlet side facing the rear; the paper path of the printing bracket first passes under the first paper guide bar, and then passes through the inlet side and the outlet side in sequence.

[0013] As can be seen from the above, the reversed position of the printer position entrance and exit allows the printer stand to use its rear as the paper output position, eliminating the need for additional space. This design allows the printer stand to be placed anywhere without being picky about its location, greatly improving ease of use. An even better solution is to combine the reversed position of the printer position entrance and exit with the placement of the first paper guide rod below the printer position and the addition of the second paper guide rod, which creates an even better paper feeding path. This ensures the tension of the tattoo paper, prevents excessive corner wrapping from affecting the smoothness of paper feeding, and provides the convenience of being placed anywhere without being used, while also having a smaller size.

[0014] Another further design includes two side plates arranged laterally opposite each other and a lateral assembly connecting the two side plates; the lateral distance between the two side plates can be changed by adjusting the lateral assembly.

[0015] As can be seen from the above, this setup, compared to existing technologies that eliminate the base plate, simplifies assembly and allows for lateral adjustability of the printing stand, enabling it to adapt to tattoo paper of different widths. On the other hand, even tattoo paper of the same type can have width tolerances, resulting in varying degrees of tightness as the paper passes through the guide rod, affecting printing quality. This setup allows for fine-tuning between the guide rod and the side plates, ensuring a proper fit between the guide rod and the tattoo paper, preventing wrinkles, and improving printing results.

[0016] A further embodiment is that the transverse component includes a transverse extension and a rotating component. The transverse extension is positioned transversely between the two side plates, and the rotating component is rotatably connected to the side plates. The rotating component is threadedly connected to the first paper guide rod, and rotating the rotating component can change the distance between the two side plates.

[0017] As can be seen from the above, with this setting, the distance between the two side panels can be adjusted simply by rotating the rotating part, making the operation simple and improving the user experience.

[0018] A further proposed solution is to use the first paper guide rod as a lateral extension.

[0019] As can be seen from the above, with this configuration, the paper guide rod serves as both a functional component for guiding paper and a structural component for supporting the two side plates, reducing the number of parts, simplifying the product structure, reducing weight, and facilitating the construction of a simple shape.

[0020] Another further option is to include an upper and lower section arranged vertically opposite each other, with the printer located at the upper section.

[0021] As can be seen above, with this setting, the printer is positioned relatively high on the printer stand, and sufficient space is reserved below the printer to accommodate the paper guide bar and the necessary space for the paper feed path.

[0022] A further embodiment is that the printer holder includes two side plates arranged laterally opposite each other; the side plates are provided with placement notches, which penetrate between the two sides of the thickness of the side plates and open upwards, the printer position is formed between the two placement notches, and the bottom of the placement notches serves as the printer support.

[0023] As can be seen from the above, compared with the prior art, this setup only requires two side plates to form the printer position, eliminating the need for additional plates, further reducing the number of parts, simplifying the product structure, reducing weight and facilitating the construction of a simple shape, and of course, reducing product costs.

[0024] Another further option is that the shaft support structure includes a shaft mounting port, which includes an installation inlet. The shaft mounting port is connected to its installation inlet along a plane perpendicular to the transverse direction. The paper roll position includes a placement inlet. The installation inlet and the placement inlet have the same entry direction. In the transverse projection, the shaft center of the shaft mounting port passes through at least one bend to its installation inlet.

[0025] As can be seen above, the paper roll may bounce when it rotates. The design of having at least one bend from the axis center of the shaft mounting port to its mounting inlet can block the short shafts of the paper roll holders at both ends, thereby suppressing paper roll bounce, ensuring the stability, smoothness, and flatness of the paper output, and improving printing quality. Attached Figure Description

[0026] Figure 1 This is a diagram illustrating the usage status of the background technology printing bracket.

[0027] Figure 2 This is a schematic diagram of the paper feed path of a background technology printing holder.

[0028] Figure 3 This is a structural diagram of the first embodiment of the printing bracket of this utility model.

[0029] Figure 4 This is an exploded view of the first embodiment of the printing bracket of this utility model.

[0030] Figure 5This is a diagram showing the usage state of the first embodiment of the printing bracket of this utility model.

[0031] Figure 6 This is a horizontal view of the first embodiment of the printing bracket of this utility model.

[0032] Figure 7 This is a schematic diagram of the paper feed path in the first embodiment of the printing bracket of this utility model.

[0033] Figure 8 This is a schematic diagram of the paper feed path in the second embodiment of the printing bracket of this utility model.

[0034] Figure 9 This is a schematic diagram of the paper feed path in the third embodiment of the printing bracket of this utility model.

[0035] Figure 10 This is a schematic diagram of the paper feed path in the fourth embodiment of the printing bracket of this utility model.

[0036] Figure 11 This is a schematic diagram of the paper feed path in the fifth embodiment of the printing bracket of this utility model. Detailed Implementation

[0037] First embodiment of the printing bracket

[0038] like Figure 3 As shown, in the coordinate system, the x-axis represents the horizontal direction of the printing stand, the width direction of the tattoo paper mounted on the printing stand, and the axis of rotation of the tattoo paper roll; the y-axis represents the front-back direction of the printing stand; both the x-axis and y-axis are horizontal; and the z-axis represents the vertical direction, which is also the height direction of the printing stand.

[0039] See Figures 3 to 6 The printing bracket in this embodiment includes two side plates 1 and a transverse assembly. The two side plates 1 are respectively disposed on the transverse sides of the printing bracket, and the transverse assembly is connected between the two side plates 1. The two side plates 1 form a first paper roll position 1210, a second paper roll position 1220, and a printer position 110. The first paper roll position 1210 is the position of the installed bottom paper roll 81, the second paper roll position 1220 is the position of the installed transfer paper roll 82, and the printer position 110 is the position of the placed printer 83. Of course, the printing bracket can also optionally be configured with four paper roll holders 3. The paper roll holders 3 are used to fit into the axial end of the paper roll and allow the paper roll to be mounted in the shaft mounting port 12 of the mounting guide plate 1 through the short shaft 31 of the paper roll holder 3.

[0040] See also Figures 3 to 6 The length of side plate 1 is along the front-to-back direction of the print stand, and the height of side plate 1 is aligned with the height of the print stand. The plane of side plate 1 is parallel to the z-y axis plane. See also... Figure 6 The total height of the printing bracket is the same as the total height of side plate 1, and the total length of the printing bracket in the front-to-back direction is the same as the total length of side plate 1. Vertically, the printing bracket is divided into an upper part 1007 and a lower part 1006, with the center line L1 of side plate 1 as the boundary. In the front-to-back direction, the printing bracket is divided into a front part 1008 and a rear part 1009, with the dividing line L2 between the printer position 110 and the first paper roll position 1210 as the boundary. The dividing line L2 can be a vertical line passing through the midpoint of the minimum front-to-back distance between the first paper roll position 1210 and the printer position. Thus, the printer position 110 is located in the front part 1008 and the upper part 1007, while the first paper roll position 1210 and the second paper roll position 1220 are both located in the rear part 1009.

[0041] Furthermore, at the front 1008 and the position located at the upper 1007, each side plate 1 is provided with a placement notch 11 with an approximately rectangular outline. The placement notch 11 extends through the thickness of both sides of the side plate 1 and is open upward. The two placement notches 11 overlap in the horizontal direction and are spaced apart. The two placement notches 11 cooperate to form a printer position 110. The bottom of the placement notch 11 serves as a printer support. The printer 83 placed in the printer position 110 is located on both sides of the two placement notches 11 and is supported by a printer support on each side.

[0042] Furthermore, at the rear 1009, each side plate 1 is provided with a shaft support structure corresponding to the first paper roll position 1210 and a shaft support structure corresponding to the second paper roll position 1220. In this embodiment, the shaft support structure is a shaft mounting port 12, which penetrates between the two sides of the thickness of the side plate 1. The shaft mounting port 12 includes a mounting inlet 1201, which is connected to its mounting inlet 1201 along a plane perpendicular to the transverse direction. The mounting inlet 1201 is located at the upper edge of the side plate 1. The two side plates 1 form placement entrances for the first paper roll position 1210 and the second paper roll position 1220. Since the two side plates 1 are spaced apart, there is no obstruction above the first paper roll position 1210 and the second paper roll position 1220. The placement entrance is a top-down entrance between the two side plates 1. The installation entrance 1201 and the placement entrance have the same entry direction. Thus, when the paper roll with the paper roll holder 3 installed on both sides of the axis enters the paper roll position from the placement entrance, the short shaft 31 of the paper roll holder 3 also enters the shaft installation port 12 through the installation entrance 1201.

[0043] In particular, the shaft mounting port 12 in this embodiment is designed to prevent bounce. In the horizontal projection, the shaft mounting port 12 undergoes at least one bend from its axis to its mounting inlet 1201. More specifically, the shaft mounting port 12 extends vertically downward from the mounting inlet 1201, bends, and then extends forward and downward until it reaches its axis 1200. Figure 7(As shown). During printing, the paper roll tends to jump forward and upward due to being pulled. This downward bending tendency causes the side plate 12 to block the short axis 31 from the front and above, preventing the paper roll from jumping during the unwinding process, ensuring stability, and improving printing results.

[0044] The transverse assembly includes a first paper guide rod 21, a second paper guide rod 22, a crossbar 23, and six rotating parts 24. The first paper guide rod 21, the second paper guide rod 22, and the crossbar 23 are all transverse extensions of this invention and are essentially identical metal round rods. However, the first paper guide rod 21 and the second paper guide rod 22, in addition to serving as connecting structures, also function as paper guides. Threaded holes are provided at both axial ends of the first paper guide rod 21, the second paper guide rod 22, and the crossbar 23. Figure 4 As shown, the rotating component 24 includes a rod portion 241 and a head 242 connected along its own axial direction. The rod portion 241 is provided with external threads, and the outer periphery of the head 242 is provided with anti-slip patterns, or its end face is provided with a slotted, cross-shaped, or hexagonal hole. Corresponding to the rotating component 24, each side plate 1 is provided with a connecting hole 140, which penetrates through both sides of the thickness of the side plate 1; each side plate 1 is provided with three connecting holes 140. Among the three connecting holes 140, one connecting hole 140 corresponding to the first paper guide rod 21 is located at the front 1008 and at the lower 1006, one connecting hole 140 corresponding to the crossbar 23 is located at the rear end of the rear 1009 and at the lower 1006 near the center line L1, and one connecting hole 140 corresponding to the second paper guide rod 22 is located at the upper 1007 and at the dividing line L2. A portion of the rod 241 is inserted into the connecting hole 140, allowing the rotating member 24 to be rotatably mounted on the side plate 1. At this time, the head 242 is located on the outside of the side plate 1 so that it can be rotated and adjusted by the user. The threaded section of the rod 241 extends to the inside of the side plate 1 and is threadedly engaged with the threaded holes of the transverse extension members (first paper guide rod 21, second paper guide rod 22, and crossbar 23). In this way, the transverse assembly not only stably connects the two side plates 1 together, but also the first paper guide rod 21, second paper guide rod 22, and crossbar 23 are reasonably arranged to suppress deformation of the side plates 1. Furthermore, the user can easily adjust the distance between the two side plates 1 by rotating the rotating member 24.

[0045] See Figure 6 and Figure 7When the first paper guide rod 21 and the second paper guide rod 22 are installed, the second paper guide rod 22 is located at the upper part 1007. In the front-back direction, the second paper guide rod 22 is located between the first paper roll position 1210 and the first paper guide rod 21, and the upper side of the second paper guide rod 22 is higher than the axis of the first paper roll position 1210. Meanwhile, the first paper guide rod 21 is located at the lower part 1006 and below the printer position 110, and the lower side of the first paper guide rod 21 is lower than the axis 1200 of the first paper roll position 1210. The bottom 1103 of the printer position 110 is higher than the lower side of the first paper guide rod 21. The upper side of the first paper guide rod 21 and the lower side of the second paper guide rod 22 refer to the highest point of the paper rod, and the lower side refers to the lowest point of the paper rod.

[0046] See Figure 6 and Figure 7 The printer position 110 includes an inlet side 1101 and an outlet side 1102 arranged opposite to each other in the front-rear direction. The inlet side 1101 corresponds to the paper inlet of the printer 83 in the printer position 110, and the outlet side 1102 corresponds to the paper outlet of the printer 83 in the printer position 110. In this embodiment, the outlet side 1102 is arranged facing the rear 1009, that is, the paper outlet of the printer 83 in the printer position 110 faces away from the front of the print bracket. Preferably, the outlet side 1102 is higher than the top of the side plate 1.

[0047] See also Figure 7 In this embodiment, the paper path L3 of the printing holder first passes above the second paper guide bar 22, then below the first paper guide bar 21, and then sequentially passes through the inlet side 1101 and the outlet side 1102. Specifically, after the bottom paper roll 81 and the transfer paper roll 82 are drawn out, they extend forward and upward, overlap and overlap above the second paper guide bar 22, complete the first bend at the second paper guide bar 22, extend forward and downward, and then complete the second bend at the first paper guide bar 21 before extending forward and upward to the inlet side 1101.

[0048] This embodiment improves the relative positions of the first paper roll position 1210, the paper guide bar, and the printer position 110. In the first paper roll position 1210, the paper tape is drawn out from the upper part 1007 of the paper roll, descends, passes under the first paper guide bar 21, rises again, and finally enters the entrance side 1101 of the printer position 110. In this embodiment, the paper path L3 is more curved, and the tattoo paper has a larger wrap angle after passing through the first paper guide bar 21. Therefore, the tension of the tattoo paper after passing through the first paper guide bar 21 is greater, and the leveling effect of the first paper guide bar 21 is better.

[0049] Furthermore, the addition of the second paper guide rod 22 causes the tattoo paper to bend once at the second paper guide rod 22, increasing the tension. The second paper guide rod 22 is closer to the printer position 110 than the first paper roll position 1210. This setting further increases the wrap angle of the tattoo paper on the first paper guide rod 21, making the increase in the tension of the tattoo paper more significant.

[0050] On the other hand, the first paper guide rod 21 and the printer position 110 are arranged vertically, reducing the planar size of the printing support while the increase in height is not significant. This design optimizes the overall size ratio of the product, making it more compact and smaller in volume. This solves the problem of wrinkles in tattoo paper.

[0051] On the other hand, this embodiment reverses the printer position entrance and exit, allowing the printer stand to use its rear as the paper output position, eliminating the need for additional space for the paper output position. This setting allows the printer stand to be placed anywhere without being picky about its location, greatly improving ease of use. An even better solution is that when the printer position entrance and exit are reversed, combined with the first paper guide rod 21 being placed below the printer position 110 and the addition of the second paper guide rod 22, a better paper path L3 is formed. This ensures the tension of the tattoo paper, prevents the paper from being affected by excessive wrapping angles, provides the convenience of being placed anywhere, and also has a smaller size.

[0052] Second embodiment of the printing bracket

[0053] See Figure 8 In this embodiment, the first paper guide rod 421 is not located below the printer position 410, and the inlet side 4101 and outlet side 4102 of the printer position 410 are not reversed relative to the prior art; that is, the outlet side 4102 faces the front of the printer holder, and the inlet side 4101 faces away from the front part 408 and towards the rear part 409. Since the relative positions of the first paper guide rod 421, the second paper guide rod 422, and the axis of the first paper roll position are the same as in the first embodiment, this arrangement can still ensure that the tattoo paper wraps around the corners of the first paper guide rod 421 and the second paper guide rod 422, ensuring tension and flattening effect. However, the length of this embodiment is longer.

[0054] Third embodiment of the printing bracket

[0055] See Figure 9 Similar to the second embodiment, the inlet side 5101 and outlet side 5102 of the printer position 510 are not reversed relative to the prior art, that is, the outlet side 5102 faces the front of the printer holder, and the inlet side 5101 is set away from the front part 508 and faces the rear part 509.

[0056] Unlike the second embodiment, in this embodiment, the printer position 510 is located at the lower part 506, and the printer itself is not located at the upper part 507. In this embodiment, although the wrap angle of the tattoo paper on the first guide rod 521 is reduced due to the lower position of the printer position 510, the tension of the tattoo paper is still guaranteed due to the presence of the second guide rod 522.

[0057] Fourth embodiment of the printing bracket

[0058] See Figure 10 Compared to the third embodiment, this embodiment does not have a second paper guide rod. However, since the first paper guide rod 621 is located at a lower position (the lower side of the first paper guide rod 621 is located below the axis 6200 of the first paper roll position), the printing paper can also form a wrap angle of nearly 90 degrees at the first paper guide rod 621, ensuring the tension and flatness of the tattoo paper.

[0059] Fifth embodiment of the printing bracket

[0060] See Figure 11 In this embodiment, no second paper guide bar is provided. The first paper guide bar 721 is located below the printer position 710. Furthermore, the entrance side 7101 and entrance side 7102 of the printer position 710 are reversed as in the first embodiment. This arrangement can also ensure that the tattoo paper has a sufficiently large wrapping angle when passing through the first paper guide bar 721.

[0061] In other embodiments, the lateral component is a non-adjustable structure, and the distance between the two side plates cannot be adjusted through the lateral component.

[0062] In other embodiments, the printing holder does not include a paper roll tray.

[0063] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Printer stand, including: The front and rear portions are arranged opposite each other along the front-rear direction of the printing bracket; The front part is used to support the printer, and the front part is provided with a printer position and a printer support part located below the printer position; The rear portion is used to support the paper roll, and the rear portion is provided with at least two paper roll positions and two axial support structures that are laterally opposite to each of the paper roll positions along the printing bracket. The plurality of paper roll positions include a first paper roll position close to the printer position. The first paper guide bar is located on the paper path of the printing bracket, between the first paper roll position and the printer position; Its features are: The lower side of the first paper guide bar is lower than the axis of the first paper roll position, the bottom of the printer position is higher than the lower side of the first paper guide bar, and the paper feeding path of the printing bracket passes through the lower side of the first paper guide bar.

2. The printing bracket according to claim 1, characterized in that: The first paper guide bar is positioned below the printer.

3. The printing holder according to claim 1 or 2, characterized in that: It also includes a second paper guide bar; In the front-back direction, the second paper guide rod is disposed between the first paper roll position and the first paper guide rod; The upper side of the second paper guide bar is higher than the axis of the first paper roll position, and the paper feeding path of the printing bracket first passes the upper side of the second paper guide bar and then passes the lower side of the first paper guide bar.

4. The printing holder according to claim 3, characterized in that: The printer position includes an inlet side and an outlet side that are arranged opposite to each other along the front-back direction, with the outlet side facing the rear. The paper path of the printing bracket first passes under the first paper guide bar, and then passes through the inlet side and the outlet side in sequence.

5. The printing holder according to claim 3, characterized in that: The printing bracket includes two side plates arranged opposite each other along the lateral direction and a lateral assembly connecting the two side plates; The lateral distance between the two side panels can be changed by adjusting the lateral component.

6. The printing holder according to claim 5, characterized in that: The lateral component includes a lateral extension and a rotating component. The lateral extension is disposed between the two side plates along the lateral direction. The rotating component is rotatably connected to the side plates and threadedly connected to the first paper guide rod. Rotating the rotating component can change the distance between the two side plates.

7. The printing holder according to claim 6, characterized in that: The first paper guide bar serves as the lateral extension.

8. The printing holder according to claim 3, characterized in that: It includes an upper part and a lower part arranged vertically opposite each other, with the printer located in the upper part.

9. The printing holder according to claim 8, characterized in that: The printing bracket includes two side plates arranged opposite each other along the lateral direction; The side plate is provided with a placement notch that extends through the thickness of the side plate on both sides and opens upward. The printer position is formed between two of the placement notches, and the bottom of the placement notch serves as the printer support.

10. The printing holder according to claim 3, characterized in that: The shaft support structure includes a shaft mounting port, the shaft mounting port includes an installation inlet, the shaft mounting port is connected to the installation inlet along a plane perpendicular to the transverse direction, the paper roll position includes a placement inlet, and the installation inlet and the placement inlet have the same entry direction; On the lateral projection, the axis of the shaft mounting port is bent at least once from its mounting entrance.

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