A thermal printer

Abstract

The utility model discloses a thermal printer, including middle frame, paper storehouse, fixed frame, the bottom of middle frame is fixed with base through screw joint, and the top is fixed with front cover through screw joint, and paper storehouse is connected in the middle frame, and the inside of paper storehouse is equipped with adjusting assembly, and adjusting assembly includes adjusting plate and the slot of even distribution in paper storehouse, and fixed frame is fixed in the top of middle frame through screw joint and is equipped with thermal print head in fixed frame, and the bottom of thermal print head is driven to connect the rubber roller for the contact of the paper that is used to compress the paper to be printed and thermal print head and pulls the paper movement through transmission component, and the adjusting assembly in paper storehouse brings good adaptability to equipment, and through adjusting plate insertion different position's slot, can adjust paper storehouse width flexibly, can adapt multiple different specifications's paper roll to be printed, greatly reduced the equipment purchase cost, saved storage space, improved the flexibility of operation significantly.

Description

Technical Field

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

[0002] Thermal printers are widely used in many fields such as commercial transactions, catering services, and logistics distribution as a highly efficient document output device. They achieve rapid printing of images and text by heating the thermal paper in contact with the print head. They are characterized by easy operation, fast printing speed, and low noise, and can meet the needs of instant printing of receipts, invoices, express delivery slips and other documents in various scenarios.

[0003] In actual use, different scenarios have significantly different requirements for the specifications of receipts. For example, the width of shopping receipts in small convenience stores is usually narrow, while the width of invoices or logistics waybills in large supermarkets is relatively wide. In existing thermal printers, the paper tray, as the core component that holds the paper roll to be printed, is mostly designed with a fixed width and can only adapt to paper rolls of specific specifications. When it is necessary to change to a paper roll of different width, users often need to change the corresponding printer equipment, which not only increases the equipment purchase cost and storage space, but also reduces the flexibility of operation. Utility Model Content

[0004] The purpose of this invention is to provide a thermal printer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a thermal printer, comprising:

[0006] The middle frame has a base fixed to its bottom by screws and a front cover fixed to its top by screws.

[0007] The paper tray is connected to the middle frame and is used to hold the paper roll to be printed. The paper tray is equipped with an adjustment component, which includes an adjustment plate and slots evenly distributed in the paper tray. The width of the paper tray can be adjusted by inserting the bottom of the adjustment plate into the slots to accommodate paper rolls of different sizes to be printed.

[0008] A fixed frame is fixed to the top of the middle frame by screws, and a thermal printhead is provided inside the fixed frame. The bottom of the thermal printhead is connected to a rubber roller for pressing the paper to be printed into contact with the thermal printhead and pulling the paper to move through a transmission assembly.

[0009] Preferably, the top of the paper compartment is provided with a paper roll shaft, and the top two ends of the paper compartment are provided with slots, and the two ends of the paper roll shaft are inserted into the slots. The paper roll shaft and the slots cooperate to support and position the paper roll to be printed, and ensure that the paper roll rotates stably for paper feeding.

[0010] Preferably, the transmission assembly includes a motor and a first double gear. The motor is located inside the fixed frame, and the output shaft of the motor is connected to the first gear. The first double gear is rotatably connected to the fixed frame via a rotating shaft, and the first gear meshes with the first double gear. The motor transmits power to the first double gear through gear meshing, providing a power source for subsequent transmission.

[0011] Preferably, a second double gear meshes with one side of the first double gear, and the second double gear is rotatably connected to the fixed frame via a rotating shaft. The second double gear cooperates with the first double gear to realize the transfer and transmission of power and speed regulation.

[0012] Preferably, the rubber roller is rotatably connected to the fixed frame and one end of the rubber roller is connected to a second gear. The second double gear meshes with the second gear, and the power is transmitted to the rubber roller through gear meshing to drive the rubber roller to rotate in order to achieve paper pressing and traction.

[0013] Preferably, the top of the fixed frame is equipped with a motor and the output shaft of the motor is connected to a worm gear. A worm wheel is rotatably connected to the fixed frame via a rotating shaft and the worm gear meshes with the worm wheel. A cutter for cutting the paper roll is connected to the rotating shaft. The motor drives the cutter to move through the worm gear and worm wheel transmission, thereby realizing automatic cutting of the printed paper.

[0014] Preferably, the top of the middle frame is rotatably connected to a flip cover via a rotating frame, and a paper output channel is provided between the flip cover and the front cover. The flip cover facilitates the opening and closing of the paper tray for paper replacement, and the paper output channel guides the printed paper to be output smoothly.

[0015] Preferably, the middle frame is equipped with a control board and a socket is connected to the control board. The control board controls the various components of the device to work together, and the socket enables power input and signal connection with external devices.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) The adjustment components in the paper tray bring good adaptability to the equipment. By inserting the adjustment plate into the slots at different positions, the width of the paper tray can be flexibly adjusted, which can adapt to a variety of different sizes of paper rolls to be printed, greatly reducing the equipment purchase cost, saving storage space, and significantly improving the flexibility of operation.

[0018] (2) The rubber roller works with the thermal print head through the transmission component to press the paper to be printed tightly and pull it to move, which ensures the stability of the paper during the printing process and avoids problems such as blurry printing or misalignment caused by paper offset or loosening. This helps to improve the printing quality and ensure that the printed text and images are clear and accurate.

[0019] (3) The cutting mechanism consisting of worm gear, worm wheel and cutter can automatically cut the printed paper, which eliminates the manual cutting step, reduces the operation steps, improves the overall efficiency of ticket printing, and makes the printing process more convenient and efficient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is a top view of the middle frame of this utility model;

[0023] Figure 4 This is a structural schematic diagram of the fixed frame of this utility model from a first-view perspective;

[0024] Figure 5 This is a structural schematic diagram of the fixed frame of this utility model from a second perspective.

[0025] In the diagram: 1. Middle frame; 2. Base; 3. Front cover; 4. Paper tray; 5. Adjustment plate; 6. Slot; 7. Fixing frame; 8. Thermal printhead; 9. Glue roller; 10. Paper roll; 11. Card slot; 12. Motor; 13. First double gear; 14. First gear; 15. Second double gear; 16. Second gear; 17. Motor; 18. Worm gear; 19. Worm wheel; 20. Cutter; 21. Rotating frame; 22. Flip cover; 23. Paper output channel; 24. Control board; 25. Socket; 26. Metal protrusion; 27. Limit switch. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved with", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0028] This utility model provides, for example Figure 1-5 A thermal printer shown includes:

[0029] The middle frame 1 serves as a supporting carrier for the overall structure of the equipment. Its bottom is fixed with a base 2 for supporting the equipment and enhancing placement stability by screws, and its top is fixed with a front cover 3 by screws.

[0030] Paper tray 4 is connected to the middle frame 1 and is used to hold the paper roll to be printed. The paper tray 4 is provided with an adjustable component for adjustable holding space. The adjustable component includes an adjustable plate 5 for dividing the paper tray space and slots 6 evenly distributed in the paper tray 4 and providing multiple fixed positions for the adjustable plate. By inserting the bottom of the adjustable plate 5 into the slots 6 at different positions, the distance between the adjustable plate 5 and the inner wall of the paper tray 4 can be changed, thereby adaptively adjusting the width of the paper tray 4 to accommodate various paper rolls of different sizes to be printed, ensuring that the paper roll does not shift laterally during the printing process.

[0031] A fixed frame 7 is screwed to the top of the middle frame 1. The fixed frame 7 is equipped with a thermal printhead 8 for printing. The bottom of the thermal printhead 8 is connected to a rubber roller 9 through a power transmission component. The rubber roller 9 can rotate under the drive of the transmission component, thereby pressing the paper to be printed to keep it in close contact with the thermal printhead 8, and pulling the paper to move stably at a set speed to ensure the continuity and stability of the printing process.

[0032] The top of the paper tray 4 is provided with a paper roll shaft 10 for supporting the paper roll to be printed and allowing it to rotate freely. The top two ends of the paper tray 4 are provided with slots 11 for positioning and limiting the paper roll shaft, and the two ends of the paper roll shaft 10 are inserted into the slots 11. The shape of the slots 11 is adapted to the two ends of the paper roll shaft 10.

[0033] The transmission assembly includes a motor 12 that provides driving force and a first double gear 13 that enables power transmission and speed change. The motor 12 is housed in a fixed frame 7. The output shaft of the motor 12 is connected to a first gear 14 that transmits motor power. The first double gear 13 is rotatably connected to the fixed frame 7 via a rotating shaft, and the first gear 14 meshes with the first double gear 13. Through the meshing transmission between the gears, the power of the motor 12 is transmitted to the first double gear 13, thereby achieving effective power transmission.

[0034] The first double gear 13 is meshed with a second double gear 15 on one side, which can further transmit power. The second double gear 15 is rotatably connected to the fixed frame 7 through a rotating shaft. The second double gear 15 cooperates with the first double gear 13 to change the direction and speed of power transmission, making power transmission more reasonable and efficient, and providing a suitable driving force for the rubber roller 9.

[0035] The rubber roller 9 is rotatably connected to the fixed frame 7, and one end of the rubber roller 9 is connected to a second gear 16 that can receive power and drive the rubber roller to rotate. The second double gear 15 meshes with the second gear 16. Through the meshing transmission of the second double gear 15 and the second gear 16, the power is finally transmitted to the rubber roller 9, driving the rubber roller 9 to rotate at a set speed, ensuring that the paper traction speed matches the printing speed.

[0036] The top of the fixed frame 7 is equipped with a motor 17 that provides cutting power, and the output shaft of the motor 17 is connected to a worm gear 18 that can transmit rotational power. The fixed frame 7 is rotatably connected to a worm wheel 19 that can cooperate with the worm gear 18 to realize power conversion, and the worm gear 18 and the worm wheel 19 mesh. The shaft is connected to a cutter 20 for cutting the printed paper roll. Through the meshing transmission of the worm gear 18 and the worm wheel 19, the rotational power of the motor 17 is converted into the cutting action of the cutter 20, realizing automatic cutting of paper and improving the convenience of operation.

[0037] The top of the middle frame 1 is rotatably connected to a flip cover 22 via a rotating frame 21 that enables the flip cover to rotate. The flip cover 22 can rotate around the rotating frame 21 to open and close the paper compartment, which is convenient for placing and replacing paper rolls. A paper output channel 23 is provided between the flip cover 22 and the front cover 3 to guide the paper output after printing. The shape and size of the paper output channel 23 are adapted to the paper to ensure that the paper can be output smoothly from the device.

[0038] The middle frame 1 is equipped with a control board 24 for controlling the coordinated operation of various components of the device. The control board 24 can receive and process printing instructions and send control signals to each execution component. The control board 24 is also connected to a socket 25 for connecting the device to an external power source or control device. The socket 25 provides power input and signal transmission interface for the device to ensure normal operation of the device.

[0039] In this thermal printer, the flip cover 22 is connected to the middle frame 1 via a rotating bracket 21. When the flip cover 22 is flipped outward, the shaft of the rotating bracket 21 rotates smoothly within the corresponding slot in the middle frame 1, fully exposing the paper tray 4 and removing the paper roll 10. The paper roll is then rotated and fitted onto the paper roll 10. After the paper roll to be printed is placed into the paper tray 4, the adjusting plate 5 is adjusted according to the width of the paper roll. The protrusion at the bottom of the adjusting plate 5 mates with the slots 6 at different positions on the inner wall of the paper tray 4. After insertion, the adjusting plate 5 and the inner wall of the other side of the paper tray 4 form a space matching the width of the paper roll, securely clamping the paper roll from both sides. At this time, the cylindrical structures at both ends of the paper roll 10 are embedded into the arc-shaped slots 11 at the top of the paper tray 4, and then one end of the paper roll is led out, so that it passes flat through the gap between the thermal print head 8 and the rubber roller 9, ensuring that the edge of the paper is aligned with the guide marks inside the equipment. When the flip cover 22 is closed, the pressing plate on the inside of the flip cover 22 will push the thermal print head 8 slightly downward, forming appropriate pressure with the rubber roller 9 to tightly press the paper. At this time, the control board 24 is connected to an external power source through the socket 25. After the power is converted by the circuit inside the control board 24, it is used to power the motor 12, the thermal print head 8, and the motor 17. Once all components provide a stable operating voltage, and the control board 24 receives the printing command, it sends a start signal to the motor 12. The rotor inside the motor 12 begins to rotate, and the output shaft, connected by a key, drives the first gear 14 to rotate synchronously. The teeth of the first gear 14 mesh with the teeth on one side of the first double gear 13. As the first gear 14 rotates, the meshing force between the teeth drives the first double gear 13 to rotate. The teeth on the other side of the first double gear 13 precisely engage with the teeth of the second double gear 15, transmitting power to the second double gear 15. This drives the second gear 16, which is coaxial with it, to rotate. Since the second gear 16 is tightly connected to the rubber roller 9, the rubber roller 9 rotates together with the second gear 16. During the rotation, the rubber layer on the surface of the rubber roller 9 generates friction with the paper, pulling the paper forward at a stable speed. At the same time, the control board 24 sends an electrical signal to the thermal print head 8 according to the printing data. Multiple heating elements inside the thermal print head 8 selectively heat up according to the signal instructions. The heating part comes into contact with the moving thermal paper, causing the thermal coating on the surface of the paper to undergo a chemical reaction, displaying clear text and images.

[0040] After the printed content is output, the control board 24 sends a working signal to the motor 17 of the cutting mechanism. The motor 17 starts and drives the worm gear 18 on the output shaft to rotate. The thread of the worm gear 18 meshes with the tooth groove of the worm wheel 19, converting the rotational motion of the worm gear 18 into the rotation of the worm wheel 19. The cutter 20 is connected to the rotating shaft and rotates together with the worm wheel 19. When the cutter 20 rotates, its blade cooperates with the blade pad fixed on the fixed frame 7 to cut the paper passing between them. The sharp edge of the blade ensures that the paper is cut neatly. A metal protrusion 26 is installed on the top of the worm wheel 19, while the fixed frame 7... A limit switch 27 is installed at the corresponding position on the fixed frame 7. When the motor 17 drives the worm gear 18 to rotate the worm wheel 19, the metal protrusion 26 on the top of the worm wheel 19 moves synchronously. After the cutter 20 completes the cutting action, the metal protrusion 26 contacts the limit switch 27. The limit switch 27 feeds the signal back to the control board 24. The control board 24 immediately cuts off the power supply to the motor 17, so that the worm gear 18 and the worm wheel 19 stop transmission, realizing the machine stop after cutting. The cut paper is sent out of the equipment through the paper output channel 23 formed between the flip cover 22 and the front cover 3 under the slight push of the rubber roller 9 and the subsequent paper, completing the entire printing process.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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. A thermal printer, characterized in that, include: The middle frame (1) has a base (2) fixed to the bottom by screws and a front cover (3) fixed to the top by screws. Paper tray (4), the paper tray (4) is connected to the middle frame (1) and is used to hold the paper roll to be printed. The paper tray (4) is provided with an adjustment component, the adjustment component includes an adjustment plate (5) and slots (6) evenly distributed in the paper tray (4). By inserting the bottom of the adjustment plate (5) into the slot (6), the width of the paper tray (4) is adjusted to adapt to different sizes of paper rolls to be printed. The fixed frame (7) is fixed to the top of the middle frame (1) by screws and a thermal print head (8) is provided inside the fixed frame (7). The bottom of the thermal print head (8) is connected to a rubber roller (9) for pressing the paper to be printed into contact with the thermal print head (8) and pulling the paper to move through a transmission assembly.

2. A thermal printer according to claim 1, characterized in that: The top of the paper bin (4) is provided with a paper roll (10), and the top two ends of the paper bin (4) are provided with slots (11) and the two ends of the paper roll (10) are inserted into the slots (11).

3. A thermal printer according to claim 1, characterized in that: The transmission assembly includes a motor (12) and a first double gear (13). The motor (12) is located inside the fixed frame (7). The output shaft of the motor (12) is connected to the first gear (14). The first double gear (13) is rotatably connected to the fixed frame (7) through a rotating shaft, and the first gear (14) meshes with the first double gear (13).

4. A thermal printer according to claim 3, characterized in that: The first double gear (13) is meshed with a second double gear (15) on one side, and the second double gear (15) is rotatably connected to the fixed frame (7) through a rotating shaft.

5. A thermal printer according to claim 4, characterized in that: The rubber roller (9) is rotatably connected to the fixed frame (7) and one end of the rubber roller (9) is connected to the second gear (16), and the second double gear (15) meshes with the second gear (16).

6. A thermal printer according to claim 1, characterized in that: The top of the fixed frame (7) is provided with a motor (17) and the output shaft of the motor (17) is connected to a worm (18). A worm wheel (19) is rotatably connected to the fixed frame (7) via a rotating shaft and the worm (18) meshes with the worm wheel (19). A cutter (20) for cutting paper rolls is connected to the rotating shaft.

7. A thermal printer according to claim 1, characterized in that: The top of the middle frame (1) is rotatably connected to a flip cover (22) via a rotating frame (21), and a paper output channel (23) is provided between the flip cover (22) and the front cover (3).

8. A thermal printer according to claim 1, characterized in that: The middle frame (1) is provided with a control board (24) and a socket (25) is connected to the control board (24).

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