Paper feeding structure of printing module

Abstract

The utility model discloses a printing module paper feeding structure, which belongs to the technical field of thermal printers and comprises a thermal printer shell, a paper containing bin, a thermal paper roll, a conveying rubber roller, a mounting side plate, a heat dissipation roller, a heat dissipation convex plate and a through hole. Heat generated when the heat dissipation roller rubs with the thermal paper roll can be discharged outwards, the thermal paper roll is prevented from developing due to the fact that the temperature of the heat dissipation roller is too high, and when the temperature in the printer is high, the temperature on the thermal paper roll can be radiated into the heat dissipation roller through the heat dissipation roller and the through holes formed in the surface of the heat dissipation roller, so that the heat dissipation effect is improved. And the heat dissipation effect is better through the heat dissipation protruding plates, the lower pressing roller and the jacking roller can have the same heat dissipation effect through the hollow interior of the lower pressing roller and the jacking roller and the two sides of the lower pressing roller and the two sides of the jacking roller penetrate through the second supporting arms and the first supporting arms, and the heat dissipation effect of the lower pressing roller and the jacking roller is better through the arrangement of the heat dissipation protruding plates.

Description

Technical Field

[0001] This utility model belongs to the field of thermal printer technology, specifically, it relates to a paper feeding structure for a printing module. Background Technology

[0002] Thermal printers can print on various types of paper rolls, such as label rolls and ticket rolls. In order to accommodate paper rolls of different widths and prevent the paper rolls from shifting during the printing process, existing technologies usually set a limiting plate that can move along the axial direction of the paper roll in the paper tray. When the limiting plate moves to a predetermined position that abuts against the paper roll, it achieves axial limiting of the paper roll.

[0003] Chinese utility model patent CN222628969U discloses a thermal printer with a reciprocatingly movable limiting plate that is locked in the axial direction of the paper tray by a locking mechanism. This not only simplifies the paper roll limiting structure but also ensures reliable positioning and stable paper roll limiting. The thermal printer can be equipped with a movable baffle that is used in combination with the limiting plate to meet the paper roll positioning requirements in different printing application scenarios and expand the application range of the thermal printer.

[0004] Although this thermal printer can limit and position paper rolls of different sizes, the thermal paper is fed through a rubber roller, and the thermal surface is prone to rubbing against the inner wall of the thermal printer. If there are impurities or dust inside the thermal printer housing, it can cause scratches on the thermal surface, resulting in unclear printed content. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] To address the problem mentioned in the background art that although the thermal printer can limit and position paper rolls of different sizes, the thermal paper is transported by a rubber roller, and the thermal surface is prone to friction with the inner wall of the thermal printer. If there are impurities or dust inside the thermal printer housing, scratches will be caused to the thermal surface, resulting in unclear printed content, the present invention adopts the following technical solution.

[0007] A paper feeding structure for a printing module includes a thermal printer housing. A paper tray is located inside one side of the thermal printer housing, and a thermal paper roll is installed inside the paper tray. A conveyor roller is installed on the other side of the thermal printer housing. The thermal paper roll adheres to the outer wall of the conveyor roller and is conveyed outwards by the rotation of the conveyor roller. Mounting side plates are detachably connected to both sides of the interior of the thermal printer housing. A cooling roller is rotatably connected between the two mounting side plates. The thermal paper roll passes over the cooling roller and then under the conveyor roller. The cooling roller is hollow inside and penetrates the mounting side plates on both sides. Multiple heat dissipation protrusions are fixedly connected to the inner wall of the cooling roller, and multiple through holes are provided on the outer wall of the cooling roller.

[0008] Preferably, a second arm is detachably connected between the two side mounting plates near the bottom. A lifting roller is rotatably connected to the outer wall of the second arm near the upper end. The thermal paper roll is attached to the outer wall of the lifting roller. A first arm is rotatably connected to one side of the two side mounting plates by a torsion spring. The first arm has a downward rotating force. A lower pressure roller is rotatably connected to the end of the first arm. The thermal paper roll passes between the lower pressure roller and the lifting roller.

[0009] Preferably, the interior of the lower pressure roller and the lifting roller is also hollow and penetrates the first support arm and the second support arm on both sides. Multiple heat dissipation convex plates are fixedly connected to the inner walls of the lower pressure roller and the second support arm, and multiple through holes are also provided on the surface of the lower pressure roller and the lifting roller.

[0010] Preferably, the four corners of the mounting side plate are connected to the plug shaft, and the end of the plug shaft is fixedly connected to the threaded rod, which is threadedly connected to the inner wall of the thermal printer housing.

[0011] Preferably, the heat dissipation roller is fixedly connected to both ends with connectors, and a rotating cap is detachably connected to the outer wall of one connector. An L-shaped connecting plate is rotatably connected to the outside of the rotating cap. A first branch pipe and a second branch pipe are rotatably connected to the two horizontal edges of the L-shaped connecting plate. The rotation axis of the second branch pipe coincides with the rotation axis of the first support arm. The outer walls of the ends of the second branch pipe and the first branch pipe are rotatably connected to the first connecting pipe and the second connecting pipe. The first connecting pipe is connected and communicates with one end of the lower pressure roller through the connection. The second connecting pipe is connected and communicates with one end of the lifting roller through the connection. The other connector is connected to an external micro air pump.

[0012] Preferably, a stepper motor and a gear set are installed on the thermal printer housing, a thermal printing component is detachably connected to one side of the conveyor roller, a core support is provided on one side of the thermal printer housing, a switch shaft and a switch swing arm are provided above the core support, and a PCB main control board is detachably connected to the bottom inner side of the core support.

[0013] Preferably, the outer wall of the heat dissipation roller is provided with multiple through holes, and the surfaces of the lower pressure roller and the lifting roller are also provided with multiple through holes, which are connected to the hollow parts of the heat dissipation roller, the lower pressure roller and the lifting roller.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The heat dissipation roller is hollow inside and has side plates that penetrate on both sides, which can dissipate the heat when it rubs against the thermal paper roll. This prevents the heat dissipation roller from overheating and causing the thermal paper roll to develop color. In addition, when the internal temperature of the printer is high, the heat on the thermal paper roll can be radiated into the heat dissipation roller through the heat dissipation roller and the through holes on the surface of the heat dissipation roller. The heat dissipation plate makes the heat dissipation effect even better.

[0016] 2. The lifting roller can lift the thermal paper roll upwards, thus preventing the thermal paper roll from rubbing against the inner wall of the thermal printer casing and causing scratches that result in unclear printing. The pressure roller applies a downward force to the thermal paper roll, which can maintain the appropriate tension and prevent the thermal paper roll from getting tangled and jammed inside the printer. The first arm is connected to the torsion spring of the mounting side plate, so that when changing the thermal paper roll, the first arm can be rotated upwards, which can easily clamp the thermal paper roll between the pressure rollers.

[0017] 3. The hollow interior of the lower pressure roller and the lifting roller, as well as the second and first support arms running through both sides, enable the lower pressure roller and the lifting roller to have the same heat dissipation effect. The heat dissipation convex plate further enhances the heat dissipation effect of the lower pressure roller and the lifting roller. Combined with the heat dissipation roller, the cooling effect of the thermal paper roll is even better.

[0018] 4. The plug-in shaft design allows for a gap between the mounting side plate and the inner wall of the thermal printer housing, enabling the heat from both ends of the heat dissipation roller, the lower pressure roller, and the lifting roller to dissipate and escape to the outside, resulting in better heat dissipation.

[0019] 5. By using a miniature air pump to draw air from the inside of the lower pressure roller and the lifting roller, the air enters the interior of the heat dissipation roller through the first connecting pipe, the second connecting pipe, the first branch pipe, the second branch pipe, the L-shaped connecting plate, and the rotating cap, and is then discharged outwards, thereby improving the heat dissipation effect of the heat dissipation roller, the lower pressure roller, and the lifting roller.

[0020] 6. By using the through-hole in conjunction with the micro air pump, dust on the surface of the thermal paper roll can be extracted, preventing the rubber roller from being unable to convey the thermal paper roll due to the presence of dust and impurities, and preventing dust and impurities from blocking the heat of the thermal printer components, which would result in incomplete printing. The hollow interior of the lower pressure roller and the lifting roller, with the first and second arms penetrating on both sides, can prevent excessive suction at the through-hole from preventing the thermal paper roll from being unable to be conveyed. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the paper feeding structure of a printing module in this utility model;

[0022] Figure 2 This is a schematic diagram of the heat dissipation roller structure in this utility model;

[0023] Figure 3 This is a schematic diagram of the threaded rod structure in this utility model;

[0024] Figure 4 This is a schematic diagram of the L-shaped connecting plate structure in this utility model.

[0025] The correspondence between the labels and component names in the attached figures is as follows:

[0026] 100. Thermal printer housing; 101. Paper tray; 102. Thermal paper roll; 103. Thermal printing assembly; 104. PCB main control board; 105. Switch shaft; 106. Switch swing arm; 107. Machine mechanism support; 108. Conveyor roller;

[0027] 200. Heat dissipation roller; 201. Insertion shaft; 202. First support arm; 203. Lower pressure roller; 204. Second support arm; 205. Lifting roller; 207. Heat dissipation protrusion; 208. Mounting side plate; 209. Threaded rod; 210. Connector;

[0028] 300, L-shaped connecting plate; 301, rotating cap; 302, first branch pipe; 303, second branch pipe; 304, first connecting pipe; 305, second connecting pipe. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. The present invention provides the following embodiments.

[0032] like Figure 1 The diagram shows a preferred embodiment of the paper feeding structure of a printing module of this utility model. The paper feeding structure of this embodiment includes a thermal printer housing 100. A paper tray 101 is located inside one side of the thermal printer housing 100, and a thermal paper roll 102 is installed inside the paper tray 101. A conveying roller 108 is installed on the other side of the thermal printer housing 100. The thermal paper roll 102 adheres to the outer wall of the conveying roller 108 and is conveyed outwards by the rotation of the conveying roller 108. A stepper motor and a gear set are installed on the thermal printer housing 100. A thermal printing assembly 103 is detachably connected to one side of the conveying roller 108. A core support 107 is provided on one side of the core support 107. A switch shaft 105 and a switch swing arm 106 are provided above the core support 107. A PCB main control board 104 is detachably connected to the bottom inner side of the core support 107. In this embodiment, the stepper motor drives the gear set to reduce the speed of the motor and drive the rotation of the conveying roller 108, thereby conveying the thermal paper roll 102 outward. Data instructions are sent to the PCB main control board 104 through the upper software to make the thermal printing component 103 generate heat to print on the thermal paper roll 102, so that the font and symbols are displayed. Pressing the switch swing arm 106 can open the printer box cover for easy replacement of the thermal paper roll 102.

[0033] like Figure 1 as well as Figure 2 As shown, this is a schematic diagram of the heat dissipation roller structure in this embodiment. The thermal printer housing 100 has detachable mounting side plates 208 connected to both sides of its interior. A heat dissipation roller 200 is rotatably connected between the two mounting side plates 208. The thermal paper roll 102 passes over the heat dissipation roller 200 and then under the conveying roller 108. The heat dissipation roller 200 is hollow inside and penetrates the mounting side plates 208 on both sides. Multiple heat dissipation protrusions 207 are fixedly connected to the inner wall of the heat dissipation roller 200. In this embodiment, the hollow interior of the heat dissipation roller 200 and the penetration of the mounting side plates 208 on both sides allow heat generated during friction with the thermal paper roll 102 to be dissipated outwards, preventing overheating of the heat dissipation roller 200 and resulting in color development of the thermal paper roll 102. Furthermore, when the internal temperature of the printer is high, the heat from the thermal paper roll 102 can be radiated to the interior of the heat dissipation roller 200 through the heat dissipation roller 200, and the heat dissipation protrusions 207 further enhance the heat dissipation effect.

[0034] like Figure 2As shown, to avoid friction between the thermal paper roll 102 and the inner wall of the thermal printer housing 100, in this embodiment, a second support arm 204 is detachably connected between the two side mounting plates 208 near the bottom. A lifting roller 205 is rotatably connected to the outer wall of the second support arm 204 near the upper end. The thermal paper roll 102 adheres to the outer wall of the lifting roller 205. A first support arm 202 is rotatably connected to one side of the two side mounting plates 208 via a torsion spring. The first support arm 202 has a downward rotating force. A lower pressure roller 203 is rotatably connected to the end of the first support arm 202. The thermal paper roll 102 passes between the lower pressure roller 203 and the lifting roller 205. In this example, the lifting roller 205 can lift the thermal paper roll 102 upwards, thereby preventing the thermal paper roll 102 from rubbing against the inner wall of the thermal printer housing 100, which would cause scratches on the thermal paper roll 102 and result in unclear printing. The pressure roller 203 applies a downward force to the thermal paper roll 102, which can keep the thermal paper roll 102 at a suitable tension and prevent the thermal paper roll 102 from getting tangled and jammed inside the printer. The first support arm 202 is connected to the mounting side plate 208 by a torsion spring, so that when changing the thermal paper roll 102, the first support arm 202 can be rotated upwards, which can easily clamp the thermal paper roll 102 between the pressure rollers 203.

[0035] like Figure 2 As shown, in order to lower the temperature of the thermal paper roll 102, in this embodiment, the interior of the lower pressure roller 203 and the lifting roller 205 are also hollow and the first support arm 202 and the second support arm 204 penetrate through both sides. Multiple heat dissipation protrusions 207 are fixedly connected to the inner walls of the lower pressure roller 203 and the second support arm 204. In this embodiment, the hollow interior of the lower pressure roller 203 and the lifting roller 205 and the penetration of the second support arm 204 and the first support arm 202 through both sides enable the lower pressure roller 203 and the lifting roller 205 to also have a heat dissipation effect. The setting of the heat dissipation protrusions 207 makes the heat dissipation effect of the lower pressure roller 203 and the lifting roller 205 better. Combined with the heat dissipation roller 200, the cooling effect of the thermal paper roll 102 is better.

[0036] like Figure 3 As shown, this is a schematic diagram of the threaded rod structure in this embodiment. The four corners of the mounting side plate 208 pass through the plug shaft 201, and the end of the plug shaft 201 is fixedly connected to the threaded rod 209. The threaded rod 209 is threadedly connected to the inner wall of the thermal printer housing 100. In this embodiment, the setting of the plug shaft 201 allows there to be a gap between the mounting side plate 208 and the inner wall of the thermal printer housing 100, thereby allowing the heat at both ends of the heat dissipation roller 200, the lower pressure roller 203, and the lifting roller 205 to better diffuse outward and be discharged to the outside, resulting in better heat dissipation.

[0037] like Figure 4As shown, this is a schematic diagram of the L-shaped connecting plate structure in this embodiment. Connectors 210 are fixedly connected to both ends of the heat dissipation roller 200. A rotating cap 301 is detachably connected to the outer wall of one side of the connector 210. An L-shaped connecting plate 300 is rotatably connected to the outside of the rotating cap 301. A first branch pipe 302 and a second branch pipe 303 are rotatably connected to the two transverse sides of the L-shaped connecting plate 300. The rotation axis of the second branch pipe 303 coincides with the rotation axis of the first support arm 202. A first connecting pipe 304 and a second connecting pipe 305 are rotatably connected to the outer walls of the ends of the second branch pipe 303 and the first branch pipe 302. The first connecting pipe 304 is connected to the lower pressure roller 203 at one end, and the second connecting pipe 305 is connected to the lifting roller 205 at one end. The other connecting head 210 is connected to an external micro air pump. In this embodiment, the micro air pump draws air so that the air inside the lower pressure roller 203 and the lifting roller 205 enters the interior of the heat dissipation roller 200 through the first connecting pipe 304, the second connecting pipe 305, the first branch pipe 302, the second branch pipe 303, the L-shaped connecting plate 300, and the rotating cap 301, and is discharged outward, thereby improving the heat dissipation effect of the heat dissipation roller 200, the lower pressure roller 203, and the lifting roller 205.

[0038] like Figure 3 as well as Figure 4 The outer wall of the heat dissipation roller 200 is provided with multiple through holes, and the surfaces of the lower pressure roller 203 and the lifting roller 205 are also provided with multiple through holes. In this embodiment, by using the through holes in conjunction with the suction of the micro air pump, the dust on the surface of the thermal paper roll 102 can be extracted, preventing the rubber roller 108 from being unable to convey the thermal paper roll 102 due to the presence of dust and impurities, and preventing dust and impurities from blocking the heat of the thermal printer assembly, resulting in the printing content not being fully displayed. By having the lower pressure roller 203 and the lifting roller 205 hollow inside and with the first support arm 202 and the second support arm 204 penetrating on both sides, it is possible to prevent the suction at the through holes from being too strong, which would prevent the thermal paper roll 102 from being unable to be conveyed outward.

[0039] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A paper feeding structure for a printing module, comprising a thermal printer housing (100), a paper tray (101) disposed inside one side of the thermal printer housing (100), a thermal paper roll (102) installed inside the paper tray (101), and a conveying roller (108) installed on the other side of the thermal printer housing (100), the thermal paper roll (102) being attached to the outer wall of the conveying roller (108) and conveyed outward by rotation of the conveying roller (108), characterized in that, The thermal printer housing (100) has detachable mounting side plates (208) on both sides inside. A heat dissipation roller (200) is rotatably connected between the two mounting side plates (208). The thermal paper roll (102) passes over the heat dissipation roller (200) and then under the conveyor roller (108). A second support arm (204) is detachably connected between the two mounting side plates (208) near the bottom. The outer wall of the second support arm (204) near the upper end is... A lifting roller (205) is rotatably connected to the thermal paper roll (102), which is attached to the outer wall of the lifting roller (205). A first arm (202) is rotatably connected to a torsion spring on one side between the side plates (208) installed on both sides. The first arm (202) has a downward rotational force. A lower pressure roller (203) is rotatably connected to the end of the first arm (202). The thermal paper roll (102) passes between the lower pressure roller (203) and the lifting roller (205).

2. The paper feeding structure of the printing module according to claim 1, characterized in that, The heat dissipation roller (200) is hollow inside and has side plates (208) that penetrate both sides. Multiple heat dissipation protrusions (207) are fixedly connected to the inner wall of the heat dissipation roller (200).

3. The paper feeding structure of the printing module according to claim 1, characterized in that, The interior of the lower pressure roller (203) and the lifting roller (205) is also hollow and penetrates the first support arm (202) and the second support arm (204) on both sides. Multiple heat dissipation protrusions (207) are fixedly connected to the inner walls of the lower pressure roller (203) and the second support arm (204).

4. The paper feeding structure of the printing module according to claim 3, characterized in that, The four corners of the mounting side plate (208) are connected to the plug shaft (201), and the end of the plug shaft (201) is fixedly connected to the threaded rod (209), which is threaded to the inner wall of the thermal printer housing (100).

5. The paper feeding structure of the printing module according to claim 3 or 4, characterized in that, The heat dissipation roller (200) is fixedly connected to both ends of the connector (210). A rotating cap (301) is detachably connected to the outer wall of one side connector (210). An L-shaped connecting plate (300) is rotatably connected to the outside of the rotating cap (301). A first branch pipe (302) and a second branch pipe (303) are rotatably connected to the two horizontal sides of the L-shaped connecting plate (300). The rotation axis of the second branch pipe (303) coincides with the rotation axis of the first support arm (202). The outer walls of the ends of the second branch pipe (303) and the first branch pipe (302) are rotatably connected to a first connecting pipe (304) and a second connecting pipe (305). The first connecting pipe (304) is connected to and communicates with one end of the lower pressure roller (203). The second connecting pipe (305) is connected to and communicates with one end of the lifting roller (205). The other side connector (210) is connected to an external micro air pump.

6. The paper feeding structure of the printing module according to claim 5, characterized in that, A stepper motor and gear set are installed on the thermal printer housing (100). A thermal printing assembly (103) is detachably connected to one side of the conveyor roller (108). A core support (107) is provided on one side of the thermal printer housing (100). A switch shaft (105) and a switch swing arm (106) are provided above the core support (107). A PCB main control board (104) is detachably connected to the bottom inner side of the core support (107).

7. The paper feeding structure of the printing module according to claim 5, characterized in that, The outer wall of the heat dissipation roller (200) is provided with multiple through holes, and the surfaces of the lower pressure roller (203) and the lifting roller (205) are also provided with multiple through holes, which are connected to the hollow parts of the heat dissipation roller (200), the lower pressure roller (203) and the lifting roller (205).

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