Thermal printing module

Abstract

The utility model discloses a thermal printing module, which belongs to the technical field of thermal printers and comprises a printer shell, a paper placing bin, thermal paper, a winding paper tube, an inserting shaft body, a sliding groove and supporting blocks. The supporting blocks on the two sides move outwards at the same time and can contract inwards, then winding paper tubes with different inner diameters can be clamped, the contact area between the supporting blocks and the winding paper tubes is large, so that the fixing effect is better, slipping is avoided, and friction deformation of the winding paper tubes can be prevented; by pressing the side baffles on the two sides and rotating the two-way screw rod, the internal thread rings on the two sides move oppositely or oppositely at the same time, and then the multiple supporting blocks are unfolded outwards or folded inwards in cooperation with the appearance of the inserting shaft body and telescopic connection of the supporting blocks and the internal thread rings.

Description

A thermal printing module Technical Field

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

[0002] The working principle of a thermal document printing module is that a semiconductor heating element is installed on the print head. After the print head heats up and comes into contact with the thermal paper, it can print the required patterns and text. It mainly consists of a print head, a transmission mechanism, a control system, and a power supply system. It is the main component of a thermal printer. A thermal printer is a printing device that uses thermal printing technology to print information such as text, images, and barcodes. It heats the print head to cause a chemical reaction in the photosensitive layer on the thermal paper or thermal label, thereby generating the required content on the paper.

[0003] Chinese utility model patent CN220973706U discloses a thermal document printing module. The module uses two conical platforms whose sides abut against the ends of hollow holes in a roll of thermal paper, thus suspending the roll of thermal paper on a support rod. The sides of the two conical platforms can accommodate rolls of thermal paper with different hollow hole sizes. During rotation, the surface of the roll of printing paper never comes into contact with the inner wall of the paper tray, effectively reducing frictional resistance during rotation and preventing slippage and paper feeding problems caused by the rotating rollers.

[0004] Although this thermal printing component can reduce the frictional resistance encountered by the roll of thermal paper during rotation, the contact between the frustum and the paper tube is linear, which makes it easy for the thermal paper roll to slip during rotation, resulting in poor fixation. Furthermore, once slippage occurs, the paper tube will deform due to friction, causing the thermal paper to shake during transport and affecting the printing effect. Summary of the Invention

[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 that while the thermal printing assembly mentioned in the background art can reduce the frictional resistance experienced by the roll of thermal paper during rotation, the linear contact between the frustum and the paper tube makes it prone to slippage during the rotation of the thermal paper roll, resulting in poor fixation. Furthermore, slippage can cause frictional deformation of the paper tube, leading to vibration of the thermal paper during transport and affecting the printing effect, this utility model adopts the following technical solution.

[0007] A thermal printing module includes a thermal printer housing, an adjusting cover plate rotatably connected to the upper end of the thermal printer housing, a thermal printing component mounted on the adjusting cover plate, switch shafts mounted on two side switch arms, a conveyor roller located near the thermal printing component on the thermal printer housing, a paper tray located on one side of the thermal printer housing, thermal paper placed inside the paper tray and wound around the outer wall of a paper winding tube, the thermal paper passing between the conveyor roller and the thermal printer, a PCB main control board located at the bottom inner side of the mechanism support, mounting slots located on both sides inside the paper tray, a connecting shaft inserted into the inside of the paper winding tube, the outer diameter of the connecting shaft gradually decreasing from the center to both sides, multiple sliding grooves located on the outer wall of the connecting shaft, and a support block slidably connected inside the sliding groove.

[0008] Preferably, the inside of the plug shaft is equipped with a through groove that penetrates the side baffles on both sides. The sliding groove is connected to the inside of the through groove. Support rings are fixedly connected to both sides of the inside of the through groove. Bidirectional screws are rotatably connected to the inside of the support rings on both sides. Rotating blocks are rotatably connected to both ends of the bidirectional screws. Internal threaded rings are threaded to the outer walls on both sides of the bidirectional screws. Each support block is telescopically connected to the outer wall of the internal threaded ring.

[0009] Preferably, each support block is provided with an elastic telescopic rod between itself and the internal threaded ring. The telescopic end of the elastic telescopic rod is detachably connected to the inner wall of the support block, and the base part of the elastic telescopic rod is detachably connected to the outer wall of the internal threaded ring. Under normal conditions, the telescopic end of the elastic telescopic rod retracts inward.

[0010] Preferably, the outer walls at both ends of the insertion shaft are detachably connected with side baffles.

[0011] Preferably, a rotating block is rotatably connected to the outer wall of the side baffle, and the rotating block is inserted into the interior of the mounting slot.

[0012] Preferably, a stepper motor and a gear set are installed inside the thermal printer housing. The stepper motor drives the conveyor roller to rotate and convey the thermal paper outward after being reduced in speed by the gear set.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. Multiple support blocks on both sides can expand outward by sliding inward simultaneously, and can contract inward by moving outward simultaneously, thus satisfying the clamping of paper tubes with different inner diameters. Furthermore, the large contact area between the multiple support blocks and the paper tube results in a better fixing effect and prevents slippage, thus preventing the paper tube from being deformed by friction.

[0015] 2. During installation, by pressing the side baffles on both sides and rotating the bidirectional screw, the internal threaded rings on both sides move in opposite directions at the same time. Combined with the shape of the plug shaft and the telescopic connection between the support block and the internal threaded ring, multiple support blocks open outward or close inward.

[0016] 3. During installation, remove one side baffle and insert the paper winding tube. The thermal paper is clamped by the two side baffles, which can guide and limit the thermal paper during transportation. The rotating block is inserted into the mounting slots on both sides, which can prevent the rotating block from rotating when the thermal paper, paper winding tube, insertion shaft and side baffle rotate.

[0017] 4. The elastic telescopic rod allows the support block to slide outward or retract inward along the outer wall of the plug shaft. Attached Figure Description

[0018] Figure 1 is a schematic diagram of a thermal printing module in this utility model;

[0019] Figure 2 is a cross-sectional view of the thermal printer casing in this utility model.

[0020] Figure 3 is a schematic diagram of the side baffle structure of this utility model;

[0021] Figure 4 is a schematic diagram of the support block structure in this utility model;

[0022] Figure 5 is a schematic diagram of the installation structure of the support block and the plug-in shaft in this utility model.

[0023] The correspondence between the labels and component names in the attached figures is as follows:

[0024] 100. Thermal printer housing; 101. Adjustment cover; 102. Paper tray; 103. Mounting slot; 104. Conveyor roller; 105. Switch shaft; 106. Switch swing arm; 107. Printer support; 108. Thermal paper; 109. PCB main control board; 110. Wrapping paper tube;

[0025] 200. Insertion shaft; 201. Sliding groove; 202. Support block; 203. Elastic telescopic rod; 204. Two-way screw; 205. Support ring; 206. Rotating block; 207. Through groove; 208. Side baffle; 209. Internal threaded ring. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Figures 1 and 2 show a schematic diagram of a thermal printing module structure according to a preferred embodiment of the present invention. The thermal printing module of this embodiment includes a thermal printer housing 100. A core support 107 is detachably connected to one side of the thermal printer housing 100. An adjusting cover 101 is rotatably connected to the upper end of the thermal printer housing 100, and a thermal printing assembly is mounted on the adjusting cover 101. Switch swing arms 106 are provided on both sides of the thermal printer housing 100, and switch shafts 105 are mounted on the switch swing arms 106. A conveyor roller 104 is provided near the thermal printing assembly in the thermal printer housing 100. A stepper motor and gears are installed inside the thermal printer housing 100. The thermal printer housing 100 has a paper tray 102 on one side, which holds the thermal paper 108. The thermal paper 108 passes between the thermal roller 104 and the thermal printer. The inner bottom of the machine core bracket 107 has a PCB main control board 109. In this embodiment, the upper software sends data commands to the printer main control board to drive the stepper motor, which in turn drives the stepper motor, gear set, and conveyor roller 104 to transmit the thermal paper 108. Simultaneously, the data commands cause the thermal print head module to generate heat, which heats the thermal surface of the thermal paper 108, so that fonts, symbols, and other content are printed out.

[0030] Figure 2 shows a cross-sectional view of the thermal printer housing in this embodiment. Thermal paper 108 is wound around the outside of the winding paper tube 110. An insertion shaft 200 is inserted into the inside of the winding paper tube 110. The insertion shaft 200 installs the winding paper tube 110 inside the paper tray 102. In this embodiment, the insertion shaft 200 can support the inside of the winding paper tube 110, so that the thermal paper 108 will not rub against the inner wall of the paper tray 102 when the winding paper tube 110 is rotated.

[0031] As shown in Figures 1-3, which are schematic diagrams of the side baffle structure in this embodiment, mounting slots 103 are provided on both sides of the inside of the paper tray 102. Side baffles 208 are detachably connected to the outer walls of both ends of the insertion shaft 200. Rotating blocks 206 are rotatably connected to the outer walls of the side baffles 208. The rotating blocks 206 are inserted into the inside of the mounting slots 103. In this embodiment, during installation, one side baffle 208 is removed and the winding paper tube is inserted into the 200. The thermal paper 108 is clamped by the two side baffles 208, which can guide and limit the thermal paper 108 during transportation. By inserting the rotating blocks 206 into the inside of the mounting slots 103 on both sides, the rotating blocks 206 do not rotate when the thermal paper 108, the winding paper tube 110, the insertion shaft 200 and the side baffles 208 rotate.

[0032] As shown in Figures 4 and 5, which are schematic diagrams of the support block structure in this embodiment, the outer diameter of the insertion shaft 200 gradually decreases from the center to both sides. The outer wall of the insertion shaft 200 is provided with multiple sliding grooves 201, and the support blocks 202 are slidably connected inside the sliding grooves 201. In this embodiment, the multiple support blocks 202 on both sides can expand outward by sliding inward at the same time, and can contract inward by moving outward at the same time. This can satisfy the clamping of winding paper tubes 110 with different inner diameters. Furthermore, the large contact area between the multiple support blocks 202 and the winding paper tube 110 makes the fixing effect better and prevents slippage, thus preventing the winding paper tube 110 from being deformed by friction.

[0033] As shown in Figures 4 and 5, in order to drive the multiple support blocks 202 on both sides to move simultaneously or in opposite directions on the outer wall of the insertion shaft 200, in this embodiment, a through groove 207 penetrating the side baffles 208 on both sides is installed inside the insertion shaft 200. The sliding groove 201 communicates with the inside of the through groove 207. Support rings 205 are fixedly connected to both sides inside the through groove 207. Bidirectional screws 204 are rotatably connected inside the support rings 205 on both sides. The two ends of the bidirectional screws 204 are rotatably connected to... There is a rotating block 206, and the outer walls of the two sides of the bidirectional screw 204 are threaded with internal thread rings 209. Each support block 202 is telescopically connected to the outer wall of the internal thread ring 209. In this embodiment, during installation, by pressing the side baffles 208 on both sides and rotating the bidirectional screw 204, the internal thread rings 209 on both sides move in opposite directions at the same time. Combined with the shape of the plug shaft 200 and the telescopic connection between the support block 202 and the internal thread ring 209, the multiple support blocks 202 open outward or close inward.

[0034] As shown in Figures 4 and 5, each support block 202 is provided with an elastic telescopic rod 203 between it and the internal threaded ring 209. The telescopic end of the elastic telescopic rod 203 is detachably connected to the inner wall of the support block 202, and the base part of the elastic telescopic rod 203 is detachably connected to the outer wall of the internal threaded ring 209. Under normal conditions, the telescopic end of the elastic telescopic rod 203 retracts inward. In this embodiment, the elastic telescopic rod 203 enables the support block 202 to slide outward or retract inward along the outer wall of the insertion shaft 200.

[0035] 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 thermal printing module, comprising a thermal printer housing (100), an adjusting cover plate (101) rotatably connected to the upper end of the thermal printer housing (100), a thermal printing assembly mounted on the adjusting cover plate (101), switch shafts (105) mounted on two side switch swing arms (106), and a conveyor roller (104) disposed on the thermal printer housing (100) near the thermal printing assembly, characterized in that, A paper tray (102) is provided on one side of the thermal printer housing (100). Thermal paper (108) is placed inside the paper tray (102). The thermal paper (108) is wound around the outer wall of the winding paper tube (110). The thermal paper (108) passes through the conveyor roller (104) and is between the thermal printer. A PCB main control board (109) is provided on the bottom inner side of the machine mechanism bracket (107). Mounting slots (103) are provided on both sides inside the paper tray (102). A plug-in shaft (200) is inserted into the inside of the winding paper tube (110). The outer diameter of the plug-in shaft (200) gradually decreases from the center to both sides. Multiple sliding grooves (201) are provided on the outer wall of the plug-in shaft (200). A support block (202) is slidably connected inside the sliding groove (201).

2. The thermal printing module according to claim 1, characterized in that, The insert shaft (200) has a through groove (207) that penetrates the side baffles (208) on both sides. The sliding groove (201) is connected to the inside of the through groove (207). The inside of the through groove (207) is fixedly connected to the two sides of the through groove (207). The inside of the two side support rings (205) is rotatably connected to the inside of the two side support rings (205). The two ends of the two side support rings (204) are rotatably connected to the rotating blocks (206). The outer walls of the two sides of the two side support rings (204) are threaded with internal thread rings (209). Each support block (202) is telescopically connected to the outer wall of the internal thread ring (209).

3. The thermal printing module according to claim 2, characterized in that, Each support block (202) is provided with an elastic telescopic rod (203) between it and the internal threaded ring (209). The telescopic end of the elastic telescopic rod (203) is detachably connected to the inner wall of the support block (202), and the base part of the elastic telescopic rod (203) is detachably connected to the outer wall of the internal threaded ring (209). In the normal state, the telescopic end of the elastic telescopic rod (203) retracts inward.

4. The thermal printing module according to claim 3, characterized in that, Side baffles (208) are detachably connected to the outer walls of both ends of the plug shaft (200).

5. The thermal printing module according to claim 4, characterized in that, The outer wall of the side baffle (208) is rotatably connected to a rotating block (206), which is inserted into the interior of the mounting slot (103).

6. The thermal printing module according to claim 5, characterized in that, The thermal printer housing (100) is equipped with a stepper motor and a gear set. The stepper motor drives the conveyor roller (104) to rotate after being reduced in speed by the gear set, thus conveying the thermal paper (108) outward.

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