A high-precision thermal printer

Abstract

The utility model relates to thermal printer technical field discloses a kind of high-precision thermal printers, including base frame, the inside fixed connection of one side of base frame has motor, the output of motor is provided with transmission assembly, the inside fixed connection of the other side of base frame has paper guide support, the inside of the side of base frame away from motor is provided with TPH compression spring, the one end of TPH compression spring is provided with print head assembly, the outside fixed connection of the side of print head assembly has FPC flat cable, the outside of FPC flat cable is arranged in the inside of the side of base frame away from paper guide support, the inside rotationally connected of the side of base frame away from TPH compression spring has rubber roll body.The utility model in, through motor drive double gear three rotation, by five-stage gear transmission, to rubber roll end rubber roll 0.0625mm, then motor end only needs to walk two steps, it can match print head thermal head piece 0.125mm requirement, and the precision of the present technology is higher than the requirement of thermal head piece, can be downward compatible and can have margin.

Description

Technical Field

[0001] This utility model relates to the field of thermal printer technology, and in particular to a high-precision thermal printer. Background Technology

[0002] High-precision thermal printers are designed for printing extremely fine and clear content. They employ precision technology far exceeding that of ordinary thermal printers. At their core lies a high-density, extremely small heating element, which enables them to perfectly render tiny text, complex and high-density barcodes (especially small-sized QR codes), and graphic images containing delicate lines and details.

[0003] Existing high-precision thermal printers use densely arranged heating elements in the thermal printhead to precisely heat the thermal paper with microsecond-level pulses according to the printing data. However, the current resolution of the thermal printhead is 203 dpi, requiring the printer to print 8 dots per 1mm of paper feed. This means that printing each dot requires 0.125mm of paper feed, which cannot achieve the required 0.0625mm per step. This is below the requirements of the thermal printhead and cannot achieve high-precision paper feed. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a high-precision thermal printer, which aims to improve the existing high-precision thermal printers that cannot achieve a paper feed accuracy of 0.0625mm per step, which is lower than the requirements of the thermal printhead and thus cannot achieve high-precision paper feeding.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-precision thermal printer includes a base frame. A motor is fixedly connected to one side of the base frame, and a transmission assembly is provided at the output end of the motor. A paper guide bracket is fixedly connected to the other side of the base frame. A TPH compression spring is provided inside the base frame on the side away from the motor. A printhead assembly is provided at one end of the TPH compression spring. An FPC cable is fixedly connected to the outside of one side of the printhead assembly. The outside of the FPC cable is located inside the base frame on the side away from the paper guide bracket. A rubber roller body is rotatably connected inside the base frame on the side away from the TPH compression spring. A bushing L is rotatably connected to one end of the rubber roller body, and a bushing R is rotatably connected to the other end of the rubber roller body.

[0007] Preferably, the transmission assembly includes a double gear three, one side of which is meshed with the output end of the motor, and the other side of which is meshed with a double gear two, and the tooth end of the double gear two is meshed with a double gear one.

[0008] Preferably, the tooth ends of the double gear one are meshed with a rubber roller gear, one end of the rubber roller gear is rotatably connected to one end of the bushing R, and a round-headed mechanical screw is provided inside the rubber roller gear, with one side of the round-headed mechanical screw located on the outside of one side of the rubber roller body.

[0009] Preferably, one end of the double gear is rotatably connected to the inside of the base frame on the side away from the rubber roller body, and the other end of the double gear is rotatably connected to a gear cover plate.

[0010] Preferably, one end of the second double gear is rotatably connected to the inside of the base frame on the side away from the first double gear, and the other end of the second double gear is rotatably connected to the inside of one side of the gear cover plate.

[0011] Preferably, one end of the double gear three is rotatably connected to the inside of the base frame on the side away from the double gear two, and the other end of the double gear three is rotatably connected to the inside of the other end of the gear cover plate.

[0012] Preferably, a retaining ring L is provided inside the bushing L, and the outer side of the retaining ring L is located inside one side of the paper guide bracket.

[0013] Preferably, a retaining ring R is provided inside the bushing R, and the outer side of the retaining ring R is provided inside the other side of the paper guide bracket.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, the motor drives the double gear three to rotate, which in turn drives the double gear two and double gear one to rotate, and then drives the rubber roller gear to rotate. Subsequently, the rubber roller body rotates under the drive of the rubber roller gear, thus achieving the purpose of optimizing gear transmission. Through five-stage gear transmission, the rubber roller travels 0.0625mm to the end of the rubber roller. Therefore, the motor only needs to take two steps to match the 0.125mm requirement of the thermal printhead. This technology has a higher precision than the thermal printhead requirement, is backward compatible, and has a margin.

[0016] 2. In this utility model, the base frame, paper guide bracket, printhead assembly, FPC cable and gear cover are formed by stamping plastic. The production is fast and the cost is low. Finally, the purpose of simple structure, convenient manufacturing and assembly and cost reduction is achieved. The performance and cost are balanced through optimized design and process innovation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a high-precision thermal printer proposed in this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0020] Figure 4 This is a schematic diagram of a partial structure of the TPH compression spring in a high-precision thermal printer proposed in this utility model.

[0021] Legend:

[0022] 1. Base frame; 2. Motor; 3. Paper guide bracket; 4. Snap ring L; 5. TPH compression spring; 6. Printhead assembly; 7. Bushing L; 8. Glue roller body; 9. Bushing R; 10. Glue roller gear; 11. FPC cable; 12. Snap ring R; 13. Round head machine screw; 14. Double gear one; 15. Double gear two; 16. Double gear three; 17. Gear cover plate. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Reference Figures 1-3 The present invention provides an embodiment of a high-precision thermal printer, comprising a base frame 1, a motor 2 fixedly connected inside one side of the base frame 1, a transmission assembly provided at the output end of the motor 2, a paper guide bracket 3 fixedly connected inside the other side of the base frame 1, a TPH compression spring 5 provided inside the base frame 1 away from the motor 2, a printhead assembly 6 provided at one end of the TPH compression spring 5, an FPC cable 11 fixedly connected outside one side of the printhead assembly 6, the outside of the FPC cable 11 being located inside the base frame 1 away from the paper guide bracket 3, a rubber roller body 8 rotatably connected inside the base frame 1 away from the TPH compression spring 5, a bushing L7 rotatably connected at one end of the rubber roller body 8, and a bushing R9 rotatably connected at the other end of the rubber roller body 8;

[0025] Specifically, the base frame 1 is used to support and fix the motor 2, making the operation of the motor 2 more stable. The motor 2 is composed of the motor 2 and gears. The base frame 1 is used to support and fix the paper guide bracket 3, TPH compression spring 5, printhead assembly 6 and FPC cable 11. The width and spacing of the FPC cable 11 wires are controlled at the micrometer level, which can reduce signal attenuation and crosstalk, and ensure accurate transmission of the drive signal of the printhead heating element. The surface of the printhead assembly 6 is made of heat-resistant material, which can maintain stable performance under long-term high-frequency heating and reduce the risk of oxidation or deformation. The paper guide bracket 3 restricts the lateral movement of the paper through the side baffles or guide rails, ensuring that the paper is fed in a straight line along the width direction of the printhead and avoiding the offset of the printed content due to skew.

[0026] Reference Figures 2-4 The transmission assembly includes a double gear 3 16, one side of which is meshed with the output end of the motor 2, and the other side of which is meshed with a double gear 2 15. The teeth of the double gear 2 15 are meshed with a double gear 14. The teeth of the double gear 14 are meshed with a rubber roller gear 10. One end of the rubber roller gear 10 is rotatably connected to one end of the bushing R9. A round-headed machine screw 13 is provided inside the rubber roller gear 10, and one side of the round-headed machine screw 13 is located on the outside of one side of the rubber roller body 8. One end of the double gear 14 is rotatably connected to the inside of the base frame 1 on the side away from the rubber roller body 8, and the other end of the double gear 14 is rotatably connected to a gear cover plate 17. One end of the double gear 2 15 is rotatably connected to the inside of the base frame 1 on the side away from the double gear 14, and the other end of the double gear 2 15 is rotatably connected to the inside of one side of the gear cover plate 17.

[0027] Specifically, the motor 2 drives the double gear 3 16 to rotate, and the double gear 2 15 rotates under the reaction force of the motor 2. The double gear 2 15 then drives the double gear 14 to rotate, and the double gear 14 drives the rubber roller gear 10 to rotate. The rubber roller gear 10 then drives the round-headed mechanical screw 13 and the rubber roller body 8 to rotate. The base frame 1 and the gear cover plate 17 support the rotation of the double gear 3 16, the double gear 2 15, and the double gear 14, thereby achieving the effect of optimized gear transmission. The technical precision is higher than that of the thermal head plate, and it is backward compatible with a margin of safety.

[0028] Reference Figures 2-4 One end of the double gear 16 is rotatably connected to the inside of the base frame 1 on the side away from the double gear 15, and the other end of the double gear 16 is rotatably connected to the inside of the other end of the gear cover plate 17; a retaining spring L4 is provided inside the bushing L7, and the outside of the retaining spring L4 is provided inside one side of the paper guide bracket 3; a retaining spring R12 is provided inside the bushing R9, and the outside of the retaining spring R12 is provided inside the other side of the paper guide bracket 3.

[0029] Specifically, the base frame 1, paper guide bracket 3, printhead assembly 6, FPC cable 11, and gear cover 17 are formed by stamping plastic. This not only reduces production time but also reduces manufacturing costs. Furthermore, the base frame 1, paper guide bracket 3, printhead assembly 6, FPC cable 11, and gear cover 17 are designed with snap-fit ​​mechanisms for easy assembly, thus achieving the goals of simple structure, convenient manufacturing and assembly, and cost reduction. Performance and cost are balanced through optimized design and process innovation.

[0030] Working principle: When the device is needed, the motor 2 drives the double gear 3 16 to rotate, which in turn drives the double gear 2 15 to rotate, causing the double gear 1 14 to rotate, which in turn drives the rubber roller gear 10 to rotate, causing the rubber roller body 8 to rotate. This achieves the effect of optimized gear transmission. Through five-stage gear transmission, the rubber roller travels 0.0625mm to the end of the rubber roller. Therefore, the motor 2 only needs to travel two steps to match the 0.125mm requirement of the thermal printhead. This technology has a higher precision than the thermal printhead requirement, is backward compatible, and has a margin.

[0031] When production is required, the printer's base frame 1, paper guide bracket 3, printhead assembly 6, FPC cable 11, and gear cover 17 are made of plastic through stamping, thereby achieving the goals of simple structure, convenient manufacturing and assembly, and reduced cost. Performance and cost are balanced through optimized design and process innovation.

[0032] 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 high-precision thermal printer, comprising a base frame (1), characterized in that: A motor (2) is fixedly connected inside one side of the base frame (1). A transmission assembly is provided at the output end of the motor (2). A paper guide bracket (3) is fixedly connected inside the other side of the base frame (1). A TPH compression spring (5) is provided inside the side of the base frame (1) away from the motor (2). A printhead assembly (6) is provided at one end of the TPH compression spring (5). An FPC cable (11) is fixedly connected outside one side of the printhead assembly (6). The FPC cable (11) is located inside the side of the base frame (1) away from the paper guide bracket (3). A rubber roller body (8) is rotatably connected inside the side of the base frame (1) away from the TPH compression spring (5). A bushing L (7) is rotatably connected at one end of the rubber roller body (8). A bushing R (9) is rotatably connected at the other end of the rubber roller body (8).

2. A high-precision thermal printer according to claim 1, characterized in that: The transmission assembly includes a double gear three (16), one side of the double gear three (16) is meshed with the output end of the motor (2), the other side of the double gear three (16) is meshed with a double gear two (15), and the tooth end of the double gear two (15) is meshed with a double gear one (14).

3. A high-precision thermal printer according to claim 2, characterized in that: The tooth end of the double gear (14) is meshed with a rubber roller gear (10). One end of the rubber roller gear (10) is rotatably connected to one end of the bushing R (9). A round-headed mechanical screw (13) is provided inside the rubber roller gear (10). One side of the round-headed mechanical screw (13) is located on the outside of one side of the rubber roller body (8).

4. A high-precision thermal printer according to claim 2, characterized in that: One end of the double gear (14) is rotatably connected to the inside of the base frame (1) away from the rubber roller body (8), and the other end of the double gear (14) is rotatably connected to a gear cover plate (17).

5. A high-precision thermal printer according to claim 2, characterized in that: One end of the double gear 2 (15) is rotatably connected to the inside of the base frame (1) away from the double gear 1 (14), and the other end of the double gear 2 (15) is rotatably connected to the inside of the gear cover plate (17) on one side.

6. A high-precision thermal printer according to claim 2, characterized in that: One end of the double gear three (16) is rotatably connected to the inside of the base frame (1) on the side away from the double gear two (15), and the other end of the double gear three (16) is rotatably connected to the inside of the other end of the gear cover plate (17).

7. A high-precision thermal printer according to claim 1, characterized in that: The bushing L(7) is provided with a retaining ring L(4) inside, and the retaining ring L(4) is provided on the outside of one side of the paper guide bracket (3).

8. A high-precision thermal printer according to claim 1, characterized in that: The bushing R (9) is provided with a retaining ring R (12) inside, and the retaining ring R (12) is provided on the other side of the paper guide bracket (3).

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