A thermal transfer printing device resistant to high and low temperatures and temperature sensing

Abstract

This invention relates to a thermal transfer printing apparatus resistant to high and low temperatures and temperature sensing, comprising a frame, on which are mounted a thermal transfer printing mechanism, a thermal transfer lifting mechanism, a ribbon conveying mechanism, a power transmission mechanism, a temperature sensor, and a control device. Through a speed adjustment mechanism built into the power transmission mechanism, the transmission ratio between the thermal transfer lifting mechanism and the ribbon conveying mechanism can be flexibly adjusted, allowing for adjustment of the ribbon's conveying distance within a single stroke according to the actual width of the substrate such as the packaging bag to be printed. Simultaneously, the output frequency of the power transmission mechanism is controlled by the temperature sensor, enabling real-time adjustment under different temperature conditions. When the temperature sensor detects a low ambient temperature, the dwell time of the thermal transfer printing mechanism at the extreme printing position is extended to ensure sufficient ink melting and transfer, guaranteeing print clarity and adhesion even in low-temperature environments. When the temperature is high, the control device automatically accelerates the transfer rhythm and shortens the thermal transfer dwell time.

Description

Technical Field

[0001] This invention belongs to the technical field of thermal transfer equipment, and particularly relates to a thermal transfer printing device that is resistant to high and low temperatures and temperature sensing. Background Technology

[0002] Thermal transfer printing technology, with its advantages of clear printing, scratch and wear resistance, and flexible information changeability, is widely used in product barcodes, packaging labels, industrial labels, cable printing and other fields. Compared with traditional plate making and printing, it can switch printing content without re-opening the mold, realize one machine for multiple uses, greatly adapt to the printing needs of small batches, multiple batches and variable information, and its popularity continues to increase in industrial production, logistics warehousing, product traceability and other scenarios.

[0003] Existing thermal transfer printing relies on thermal energy to transfer consumables: a heating head replaces the laser photosensitive component, and the heating head precisely controls the temperature to form a thermal image that matches the content to be printed; bulk toner is replaced with a dedicated ribbon, and when the ribbon passes through the heating printhead, the high-temperature area melts the ink / toner on the surface of the ribbon, directly imprinting it onto the surface of the object to be printed (paper, packaging, product substrate, etc.) to form clear printed content.

[0004] However, existing technologies, with their heated printheads moving downwards during printing, suffer from limitations due to the single-speed transport structure of the ribbon and the fixed vertical movement speed of the printhead. This limits their adaptability to materials of varying widths, such as packaging bags, resulting in poor compatibility and an inability to print on materials of different sizes. Furthermore, at low temperatures, the ribbon ink melts more slowly, making incomplete transfer and faint printing common with conventional fixed speeds. In high-temperature environments, the ink melts too quickly, leading to smudging and diffusion, and the substrate is also prone to heat deformation. Higher rotation speeds and faster transfer are required, but existing thermal transfer equipment lacks this capability. Therefore, we urgently need a thermal transfer printing device that is resistant to high and low temperatures and temperature sensing to address these issues. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a thermal transfer printing device that is resistant to high and low temperatures and temperature sensing, thereby solving the problems mentioned in the background art, such as the inability to adapt to printing materials of different sizes and the inability to adjust the ribbon transport speed based on working conditions.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A thermal transfer printing device resistant to high and low temperatures and temperature sensing includes a frame, on which a thermal transfer printing mechanism, a thermal transfer lifting mechanism, a ribbon conveying mechanism, a power transmission mechanism, a temperature sensor, and a control device are arranged. The thermal transfer printing mechanism includes a printing box mounted on a frame, and a thermal printhead assembly is installed inside the printing box to achieve thermal transfer after controlled heating. The heat transfer lifting mechanism is connected to the printing box and is used to drive the heat transfer printing mechanism to move up and down; The ribbon conveying mechanism is located below the thermal transfer actuator to facilitate ribbon conveying below the thermal printhead assembly. The power transmission mechanism includes a drive mechanism and a speed adjustment mechanism; the drive mechanism is mounted on the frame and is used to provide power input to the heat transfer lifting mechanism and the ribbon conveying mechanism; the speed adjustment mechanism is mounted on the frame and is connected to the drive mechanism, the heat transfer lifting mechanism and the ribbon conveying mechanism respectively, and is satisfied to adjust the transmission ratio between the heat transfer lifting mechanism and the ribbon conveying mechanism. A temperature sensor is mounted on the frame and positioned above the carbon belt conveyor mechanism to sense the temperature and control the power input of the power transmission mechanism. The control device is electrically connected to the thermal transfer printing mechanism, the thermal transfer lifting mechanism, the ribbon conveying mechanism, the temperature sensor, and the power transmission mechanism.

[0007] Preferably, the speed adjustment mechanism includes a housing mounted on a frame. A first speed-regulating wheel system and a second speed-regulating wheel system are installed in the housing and arranged horizontally in a vertical direction and cooperate with each other. The speed-regulating wheel system includes a first conical wheel and a second conical wheel facing each other. The outer end face of the upper first conical wheel is coaxially connected to a translation shaft. The translation shaft is rotatably connected to a first moving disk. The rear end of the translation shaft extending out of the first moving disk is axially slidably connected to a first drive shaft. The first drive shaft is rotatably connected to the housing. The upper second conical wheel is rotatably connected to the housing. The outer end face of the second conical wheel at the lower end is coaxially rotatably connected to the second movable disk, and the first conical wheel at the lower end is rotatably connected to the housing. It also includes longitudinally rotatably connected guide rods on both sides of the continuously variable speed wheel system. The first and second movable disks are threaded onto their corresponding guide rods. The four sets of guide rods are driven to rotate by a gear adjustment mechanism installed inside the housing. The first drive shaft extends outside the housing and is poweredly connected to the input end of the heat transfer lifting device. The shaft of the first conical wheel at the lower end is connected to the input end of the carbon belt conveyor. A metal conical belt is fitted between the first and second speed-regulating wheel systems. The gear adjustment mechanism is electrically connected to the control device.

[0008] Preferably, the gear adjustment mechanism includes a first gear coaxially connected to four sets of guide rods, a second gear rotatably connected to the housing between the first gears on two sets of guide rods on the same movable disk, a third gear coaxially mounted on the second gear, a fourth gear rotatably connected to the housing between two sets of third gears, the fourth gear being connected to an adjuster mounted on the housing, and the adjuster being electrically connected to a control device.

[0009] Preferably, the regulator has an adjusting shaft, which is coaxially connected to the rotating shaft of the fourth gear; The regulator is equipped with a pointer to indicate the current speed regulation ratio.

[0010] Preferably, the fifth gear is coaxially mounted on the first drive shaft; The drive mechanism includes a drive motor mounted on a frame, with a first sector gear coaxially mounted on the output shaft of the drive motor, the first sector gear meshing with the fifth gear; the drive motor is electrically connected to a temperature sensor for controlled adjustment of the rotation speed of the drive motor.

[0011] Preferably, the heat transfer lifting device includes a drive plate disposed on the upper end of the printing box, and lifting plates are vertically mounted on the front and rear ends of the drive plate, and the two lifting plates are vertically slidably engaged on the frame. The heat transfer lifting device also includes a crank that is rotatably connected to the frame in the longitudinal direction. A connecting rod is rotatably connected to the outer edge of the crank in the longitudinal direction. The other end of the connecting rod is rotatably connected to the front end face of the lifting plate in the longitudinal direction. A sixth gear is coaxially mounted on the crank shaft. The sixth gear meshes with the fifth gear, so that the first sector gear drives the printing box to complete one lifting operation after being driven by the fifth gear and the sixth gear.

[0012] Preferably, it also includes two ribbon adsorption and release mechanisms; the two ribbon adsorption and release mechanisms are respectively mounted on the frame and positioned on the front and rear sides of the thermal transfer printing mechanism; The carbon ribbon adsorption-releasing mechanism includes an adsorption suction cup group and a release suction cup group. The adsorption suction cup group is disposed on the outside of the release suction cup group, and the two are spaced apart along the longitudinal direction. The adsorption suction cup assembly includes two adsorption suction cups arranged laterally at intervals, with the suction cup opening of each adsorption suction cup facing downwards and slightly above the carbon ribbon; both adsorption suction cups have a suction cup rod communicating with the inside of the suction cup, the suction cup rod being hollow, and both suction cup rods being connected to a vacuum pump mounted on the frame; the vacuum pump is connected to a control device; The relaxation suction cup assembly includes two horizontally spaced relaxation suction cups, each with its opening facing downwards and higher than the adsorption suction cup; both relaxation suction cups have a relaxation rod communicating with the interior of the cup body, the relaxation rod being hollow, and both relaxation rods being connected to an air blowing device mounted on the frame; the air blowing device is connected to a control device.

[0013] Preferably, it also includes two intermittent regulating valves installed on the frame, each intermittent regulating valve being configured to correspond to a corresponding side carbon ribbon adsorption and release mechanism; The intermittent regulating valve includes a valve housing mounted longitudinally on a frame, a valve core body slidably connected laterally within the valve housing, a vacuum gas adsorption port and a blow-up gas inlet respectively at the upper end of the valve housing, and a vacuum gas inlet and a blow-up gas outlet respectively at the lower end; the vacuum gas adsorption port and the vacuum gas inlet are on the same side and correspondingly arranged, as are the blow-up gas inlet and the blow-up gas outlet; the valve core body is provided with a vertically penetrating vacuum gas channel and a blow-up gas channel, such that when the valve core body moves laterally to its extreme positions on both sides, only the vacuum gas inlet, the vacuum gas channel, and the vacuum gas adsorption port are connected, or only the blow-up gas outlet, the blow-up gas channel, and the blow-up gas inlet are connected; the vacuum gas adsorption port is connected to the vacuum pump, and the blow-up gas inlet is connected to the blow-up device; the vacuum gas inlet is connected to each of the suction cup rods, and the blow-up gas outlet is connected to each of the release rods; Limit switches are provided on both the left and right sides inside the valve housing. The limit switches are electrically connected to the control device. When the valve core moves to the left or right limit position, the limit switch on the corresponding side is triggered to open the vacuum pump to open the vacuum channel, or to open the air blowing device to open the air blowing channel. The upper end of the valve housing is provided with a sliding hole, and the upper end of the valve core is equipped with a fixed rod that slides within the sliding hole. A lateral movement transmission mechanism is provided between the two fixed rods. The lateral movement transmission mechanism is powered by the first sector gear, so that the first sector gear drives the two valve cores to move laterally via the lateral movement transmission mechanism.

[0014] Preferably, the lateral movement mechanism includes a longitudinal rod connected between two fixed rods, one end of the longitudinal rod being connected to a sliding block, the sliding block being laterally slidably connected to the frame, and a spur rack being laterally mounted on the lower end of the sliding block. It also includes a swing rod longitudinally rotatably connected to the frame, with a second sector gear mounted on the upper end of the swing rod. The rotation center of the second sector gear is coaxial with the rotation center of the swing rod, and an elongated hole is formed at the other end of the swing rod. The second sector gear meshes with the spur gear. It also includes a rotating disk rotatably connected to the frame, with a fixing pin longitudinally installed on the end face of the outer edge of the rotating disk. The fixing pin is slidably fitted in the elongated hole. The seventh gear is coaxially mounted on the rotating disk and meshes with the first sector gear.

[0015] Preferably, the carbon belt conveyor includes a first roller, a second roller, a third roller, and a fourth roller arranged sequentially from left to right on the frame; a fifth roller arranged longitudinally on the frame and positioned below the second roller; and a sixth roller and a seventh roller arranged longitudinally on the frame and positioned between the second roller and the fifth roller. The carbon ribbon starts from the first roller, passes over the sixth roller, goes around the bottom of the fifth roller, goes over the seventh roller, goes around the fourth roller, the third roller, and the second roller, and then goes back to the first roller. The shaft of the fifth roller is coaxially connected to the shaft of the first conical wheel.

[0016] The beneficial effects of this invention are as follows: By utilizing the speed adjustment mechanism built into the power transmission mechanism, the transmission ratio between the heat transfer lifting mechanism and the ribbon conveying mechanism can be flexibly adjusted. Without replacing parts or re-adjusting the equipment, the conveying distance of the ribbon within a single stroke can be precisely adjusted according to the actual width of the substrate such as the packaging bag to be printed. This completely solves the problems of existing equipment having a single ribbon conveying rate, a fixed vertical movement speed of the print head, and being only suitable for substrates of a single width. Simultaneously, a temperature sensor controls the output frequency of the power transmission mechanism, allowing it to adjust in real time under different temperature conditions. When the temperature sensor detects a low ambient temperature, the control device automatically adjusts the power transmission mechanism, extending the dwell time of the heat transfer printing mechanism at the extreme printing position to ensure sufficient ink melting and transfer. This completely eliminates problems such as insufficient transfer, faint text, missing patterns, and insufficient adhesion, ensuring printing clarity and durability even in low-temperature environments. When the temperature is high, the control device automatically accelerates the transfer rhythm and shortens the heat transfer dwell time, while simultaneously matching the accelerated ribbon conveying and lifting actions to avoid problems such as ink smudging, blurred text, substrate deformation, and ribbon overheating and carbonization. Ensure that printed patterns are neat and distortion-free under high-temperature conditions.

[0017] Furthermore, by using a negative pressure suction cup assembly to flatten and tighten the ribbon, the problem of loose ribbon adhesion, warping, and wrinkles between the ribbon and print head during printing is completely solved. Utilizing a positive airflow from the release suction cup assembly eliminates the electrostatic attraction between the packaging paper and the ribbon, and actively pushes the packaging paper through airflow, fundamentally solving the problem of packaging paper sticking or adhering due to static electricity. This ensures smooth printing in the next cycle and improves the stability of continuous operation. The suction and release actions are precisely linked with the printing, lifting, and conveying actions; suction fixation during printing and airflow to loosen the ribbon after printing are seamlessly connected without conflict, and do not affect the original lifting and speed adjustment processes. Attached Figure Description

[0018] Figure 1 This is the first perspective view of the three-dimensional view of the present invention.

[0019] Figure 2 This is the second perspective view of the three-dimensional view of the present invention.

[0020] Figure 3 This is the third perspective view of the invention (with part of the frame removed).

[0021] Figure 4 This is the front view of the present invention.

[0022] Figure 5 This is a cross-sectional view of the present invention.

[0023] Figure 6 This is a three-dimensional structural view of the speed adjustment mechanism in this invention.

[0024] Figure 7 This is a two-dimensional structural view of the speed adjustment mechanism in this invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the first speed regulating gear train in the speed regulating mechanism of the present invention.

[0026] Figure 9 This is a three-dimensional structural view of a portion of the structure in this invention.

[0027] Figure 10 This is a two-dimensional structural view of a portion of the structure in this invention.

[0028] Figure 11 This is a three-dimensional structural diagram of part of the power transmission mechanism and its connecting parts in this invention.

[0029] Figure 12 This is a three-dimensional structural diagram of part of the carbon ribbon adsorption and relaxation mechanism in this invention.

[0030] Figure 13 This is a cross-sectional view of the intermittent regulating valve in the reset state in this invention.

[0031] Figure 14This is a cross-sectional view of the intermittent regulating valve in the vacuum channel conducting state in this invention.

[0032] Figure 15 This is a cross-sectional view of the intermittent regulating valve in the air blowing channel open state in this invention.

[0033] In the diagram, 1. Frame; 2. Heat transfer printing mechanism; 3. Heat transfer lifting mechanism; 4. Ribbon conveying mechanism; 5. Power transmission mechanism; 6. Control device; 7. Printing box; 8. Drive mechanism; 9. Speed ​​adjustment mechanism; 10. Housing; 11. First speed regulating gear train; 12. Second speed regulating gear train; 13. First conical wheel; 14. Second conical wheel; 15. Translation shaft; 16. First moving disk; 17. First drive shaft; 18. Second moving disk. 19. Moving plate; 20. Guide rod; 21. Gear adjustment mechanism; 22. First gear; 23. Second gear; 24. Third gear; 25. Fourth gear; 26. Adjuster; 27. Adjusting shaft; 28. Fifth gear; 29. ​​Drive motor; 30. First sector gear; 31. Drive plate; 32. Lifting plate; 33. Crank; 34. Connecting rod; 35. Sixth gear; 36. Carbon belt adsorption and release mechanism; 37. Adsorption suction cup; 38. Suction cup 38. Vacuum pump; 39. Release suction cup; 40. Release rod; 41. Gas blowing device; 42. Intermittent regulating valve; 43. Valve housing; 44. Valve core; 45. Vacuum gas adsorption port; 46. Gas blowing inlet; 47. Vacuum gas inlet; 48. Gas blowing outlet; 49. Vacuum gas passage; 50. Gas blowing passage; 51. Limit switch; 52. Sliding hole; 53. Fixed rod; 54. Lateral movement transmission mechanism; 55. Longitudinal rod; 56. Sliding block; 57. Spur rack; 58. Swing rod; 59. Second sector gear; 60. Elongated hole; 61. Rotating disk; 62. Fixing pin; 63. Seventh gear; 64. First roller; 65. Second roller; 66. Third roller; 67. Fourth roller; 68. Fifth roller; 69. Sixth roller; 70. Seventh roller; 71. Display screen; 72. Control switch; 73. Pressure roller; 74. Tensioning wheel. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-15The specific embodiments of the present invention will be further described in detail below. In the following description of the embodiments, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0035] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Example 1: In conjunction with the prior art, this example discloses a thermal transfer printing device that is resistant to high and low temperatures and temperature sensing, including a frame 1, on which a thermal transfer printing mechanism 2, a thermal transfer lifting mechanism 3, a ribbon conveying mechanism 4, a power transmission mechanism 5, a temperature sensor, and a control device 6 are arranged.

[0039] The thermal transfer printing mechanism 2 includes a printing box 7 mounted on the frame 1. The printing box 7 contains a thermal printhead assembly, which enables thermal transfer after controlled heating. Specifically, after heating, the thermal transfer printing device moves downwards to its limit position, where thermal transfer is achieved. The heat from the printhead directly heats the thermal coating on the surface of the thermal paper, causing a color-developing chemical reaction. The heating head, powered by electricity, melts the ink on the surface of the carbon ribbon. Combined with a conveying mechanism, the substrate is moved at a uniform speed through the printhead, transferring the ink to the substrate surface and completing the printing operation.

[0040] The heat transfer lifting mechanism 3 is connected to the printing box 7 and is used to drive the heat transfer printing mechanism 2 to move up and down. One rise and fall of the heat transfer lifting mechanism 3 completes the heat transfer work. After descending to the limit position, it stops, thus completing the heat transfer work at that position.

[0041] The ribbon transport mechanism 4 is located below the thermal transfer actuator to facilitate ribbon transport below the thermal printhead assembly. Specifically, the ribbon transport mechanism 4 is used to change the position of the ribbon during the thermal transfer process, thereby changing the ribbon to achieve thermal transfer.

[0042] The power transmission mechanism 5 includes a drive mechanism 8 and a speed adjustment mechanism 9. The drive mechanism 8, mounted on the frame 1, provides power input to the heat transfer lifting mechanism 3 and the ribbon conveying mechanism 4. The speed adjustment mechanism 9, also mounted on the frame 1, connects to the drive mechanism 8, the heat transfer lifting mechanism 3, and the ribbon conveying mechanism 4, and adjusts the transmission ratio between them. Specifically, the power transmission mechanism 5 drives the heat transfer lifting device to complete one lifting motion, thereby completing the heat transfer of the ribbon at that position and transferring the pattern information onto the packaging bag placed on the ribbon. The packaging bags are evenly spaced, a placement based on the previous process, and are placed sequentially on the ribbon. After the heat transfer printing mechanism 2 finishes printing, the ribbon conveying mechanism 4 completes one work cycle, facilitating the heat transfer work at the next station. Since the stroke of the lifting mechanism is fixed, we can adjust the transfer speed of the ribbon conveyor 4 by adjusting the speed between the two, thereby matching the different widths and sizes of packaging bags as they enter below the heat transfer printing mechanism 2.

[0043] A temperature sensor is mounted on the frame 1 and positioned above the ribbon conveyor 4. It senses the temperature and controls the power input to the power transmission mechanism 5. Specifically, the temperature sensor accepts the actual operating temperature and controls the power transmission mechanism 5 to regulate the heat transfer time. Under high-temperature conditions, the transfer speed is increased to prevent rapid ink diffusion. Under low-temperature conditions, the ribbon ink melts more slowly, allowing for sufficient heat transfer time to ensure the desired effect.

[0044] The control device 6 is electrically connected to the thermal transfer printing mechanism 2, the thermal transfer lifting mechanism 3, the ribbon conveying mechanism 4, the temperature sensor, and the power transmission mechanism 5. Specifically, the control device 6 serves as the control center of this device, used to control the working sequence and status of each mechanism, such as start-up time and shutdown time. This control device 6 can be electrically controlled and can be configured by those skilled in the art, so it will not be described in detail here.

[0045] In this embodiment, the heat transfer printing device, resistant to high and low temperatures and temperature sensing, places the packaging bags to be heat transferred sequentially and at intervals on the ribbon. The power transmission mechanism 5 drives the heat transfer lifting device, causing it to complete one lifting motion, thus completing the heat transfer of the ribbon at that position and transferring the pattern information onto the packaging bag placed on the ribbon. Simultaneously with the lifting device's lifting motion, the ribbon conveyor 4 moves one station, transporting the packaging bag to be heat transferred directly below the heat transfer printing mechanism 2. At this point, the heat transfer printing mechanism 2 has also reached the designated heat transfer position. The transmission ratio between the heat transfer lifting mechanism 3 and the ribbon conveyor 4 can be adjusted via the speed adjustment mechanism 9, allowing the ribbon to be conveyed a distance within one lifting stroke, adjusted in real time according to the width of the packaging bag to be printed. After printing, the heat transfer lifting device moves the heat transfer printing mechanism 2 upwards, while the ribbon conveyor 4 operates synchronously, conveying the ribbon according to the adjusted speed ratio to match the packaging bag of the appropriate width. Under different operating conditions, the temperature sensor can receive the actual operating temperature and use it to control the power transmission mechanism 5, thereby controlling the heat transfer time. Under high-temperature conditions, the transfer speed is increased to prevent rapid ink smudging and diffusion. Under low-temperature conditions, the melting speed of the ribbon ink slows down, allowing for sufficient heat transfer time to ensure the desired heat transfer effect.

[0046] In this embodiment, the transmission ratio between the thermal transfer lifting mechanism 3 and the ribbon conveying mechanism 4 is flexibly adjusted via the speed adjustment mechanism 9 built into the power transmission mechanism 5. Without replacing parts or re-adjusting the equipment, the conveying distance of the ribbon within a single stroke can be precisely adjusted according to the actual width of the substrate such as the packaging bag to be printed. This completely solves the problem of existing equipment having a single ribbon conveying rate and a fixed vertical movement speed of the print head, only suitable for substrates of a single width. Simultaneously, a temperature sensor controls the output frequency of the power transmission mechanism 5, allowing it to adjust in real time under different temperature conditions. When the temperature sensor detects a low ambient temperature, the control device 6 automatically adjusts the power transmission mechanism 5, extending the dwell time of the thermal transfer printing mechanism 2 at the extreme printing position to ensure sufficient ink melting and transfer. This completely eliminates problems such as insufficient transfer, faint text, missing patterns, and insufficient adhesion, ensuring printing clarity and durability in low-temperature environments. When the temperature is high, the control device 6 automatically accelerates the transfer rhythm and shortens the thermal transfer dwell time, while simultaneously matching the accelerated ribbon conveying and lifting actions to avoid ink smudging, blurred text, substrate deformation, and ribbon overheating and carbonization. Ensure that printed patterns are neat and distortion-free under high-temperature conditions.

[0047] In Embodiment 2, based on Embodiment 1, the speed adjustment mechanism 9 includes a housing 10 mounted on a frame 1. Inside the housing 10, a first speed-regulating wheel system 11 and a second speed-regulating wheel system 12 are installed horizontally and cooperate with each other. The speed-regulating wheel system includes a first conical wheel 13 and a second conical wheel 14 that are opposite each other. The outer end face of the upper first conical wheel 13 is coaxially connected to a translation shaft 15. The translation shaft 15 is rotatably connected to a first moving disk 16. The rear end of the translation shaft 15, which extends out of the first moving disk 16, is axially slidably connected to a first drive shaft 17. The first drive shaft 17 is rotatably connected to the housing 10. The upper second conical wheel 14 is rotatably connected inside the housing 10. The first drive shaft 17 has an axial movable hole at its end facing the translation shaft 15. The first drive shaft 17 has keyways at both ends of the movable hole that connect with the movable hole. The two keyways open towards the end of the translation shaft 15. Two sliding keys corresponding to the keyways are fixed radially symmetrically on the translation shaft 15. The translation shaft 15 slides axially in the movable hole, and the two sliding keys slide axially in the two keyways respectively. This allows the translation shaft 15 to move axially relative to the first drive shaft 17. When the first drive shaft 17 rotates, it can drive the translation shaft 15 to rotate, thereby driving the first conical wheel 13 on the left to rotate.

[0048] The outer end face of the second conical wheel at the lower end is coaxially rotatably connected to the second movable disk 18, and the first conical wheel 13 at the lower end is rotatably connected inside the housing 10. It also includes guide rods 19 that are longitudinally rotatably connected to the housing 10 on the upper and lower sides of the continuously variable speed wheel system. The two sides of the first movable disk 16 and the second movable disk 18 are respectively threaded onto the corresponding guide rods 19. The four sets of guide rods 19 are driven to rotate by the gear adjustment mechanism 20 installed inside the housing 10.

[0049] The gear adjustment structure includes a first gear 21 coaxially connected to four sets of guide rods 19. A second gear 22 rotatably connected inside the housing 10 meshes between the first gears 21 on the two sets of guide rods 19 on the same movable disk. A third gear 23 is coaxially mounted on the second gear 22. A fourth gear 24 rotatably connected inside the housing 10 meshes between the two sets of third gears 23. The fourth gear 24 is connected to an adjuster 25 mounted on the housing 10. The adjuster 25 is electrically connected to the control device 6.

[0050] The first drive shaft 17 extends outside the housing 10 and is poweredly connected to the input end of the heat transfer lifting device; the shaft of the lower first conical wheel 13 is connected to the input end of the carbon belt conveyor mechanism 4; a metal conical belt is fitted between the first speed regulating wheel system 11 and the second speed regulating wheel system 12, and the two inclined surfaces of the conical belt respectively engage with the first conical wheel 13 and the second conical wheel 14. Multiple first meshing teeth extending along their inclined surfaces are evenly distributed on the first conical wheel 13 and the second conical wheel 14. Second meshing teeth that mesh with the first meshing teeth are provided on the two inclined surfaces of the conical belt. By setting the first conical wheel 13 and the second conical wheel 14 as toothed pulleys and the conical belt as a toothed belt, slippage is prevented during engagement, ensuring the stability of the transmission. The gear adjustment mechanism 20 is electrically connected to the control device 6.

[0051] In this embodiment, the gear set is driven to rotate by the gear adjustment structure, which in turn drives the four sets of guide rods 19 to rotate. Due to the threaded engagement between the guide rods 19 and the first moving disk 16 and the second moving disk 18, the first moving disk 16 and the second moving disk 18 move laterally. As the first conical wheel 13 and the second conical wheel 14 on the left are positioned opposite each other, they squeeze the conical belt between them, thereby adjusting the transmission radius between the first speed regulating wheel system 11 and the second speed regulating wheel system 12, achieving stepless speed regulation. The power from the input end of the heat transfer lifting device is transmitted to the input end of the carbon belt conveyor 4 after being transmitted through the power speed regulation of the metal belt. By adjusting the guide rods 19, stepless speed regulation is achieved, allowing the device to adapt to different sizes of packaging bags, avoiding material waste and increasing the automation adjustment mechanism of the device.

[0052] In this embodiment, the speed adjustment mechanism 9 adopts a stepless speed regulation structure with a dual-speed-regulating wheel system and a metal conical belt. Relying on the design of conical wheel meshing transmission and guide rod 19 adjusting the transmission radius, it possesses unique structural advantages: First, through the toothed meshing of the first conical wheel 13, the second conical wheel 14, and the conical belt, the slippage risk of traditional belt drives and friction drives is completely avoided. The transmission process is free of loss of rotation and lag, ensuring stable and precise power transmission and guaranteeing the synchronization accuracy of lifting and lowering movements with the carbon belt conveyor. Second, with the help of the gear adjustment mechanism 20, four sets of guide rods 19 are linked to synchronously drive the first moving disc 16 and the second moving disc 18 laterally. The device features a smooth, stepless speed control system that adjusts the transmission radius between the dual-speed gear trains to achieve continuous, stepless speed regulation. This system offers a wide speed range and high precision, adapting to various widths and specifications of printing substrates. The adjustment process is smooth and shock-free. Thirdly, the gear adjustment mechanism 20 is electrically linked with the control device 6, enabling automated speed regulation without manual operation. This enhances the device's intelligence and adapts to the flexible printing needs of packaging bags of different sizes, avoiding waste of substrate and ribbon. Fourthly, the overall design utilizes a closed-type housing 10 structure, providing strong protection for internal transmission components. It maintains stable transmission even under high and low temperature conditions, without jamming or transmission failure, making it suitable for harsh industrial environments.

[0053] Compared to traditional equipment, this device can quickly adapt to materials of different sizes and specifications, truly achieving multi-purpose functionality. It eliminates the need for multiple devices for different width substrates, reducing equipment procurement and maintenance costs. It also meets the flexible production needs of small batches and multiple batches in industrial production, significantly expanding the application scenarios of the equipment.

[0054] In Example 3, based on Example 2, the regulator 25 has an adjustment shaft 26, which is coaxially connected to the shaft of the fourth gear 24. A pointer is provided on the regulator 25 to indicate the current speed adjustment ratio. In this example, the pointer on the regulator 25 can visually indicate the current speed adjustment ratio in real time, making the speed adjustment parameters visible. This facilitates quick verification and precise adjustment by operators, eliminating adaptation deviations caused by blind speed adjustments and improving adjustment efficiency and accuracy.

[0055] In Example 4, based on Example 3, a fifth gear 27 is coaxially mounted on the first drive shaft 17. The drive mechanism 8 includes a drive motor 28 mounted on the frame 1. A first sector gear 29 is coaxially mounted on the output shaft of the drive motor 28, and the first sector gear 29 meshes with the fifth gear 27. The drive motor 28 is electrically connected to a temperature sensor for controlled adjustment of the rotation speed of the drive motor 28. The sector gear intermittently drives the fifth gear 27, causing the fifth gear 27 to rotate intermittently, completing the printing work in conjunction with the intermittent pauses. Using the temperature sensor, the duration of the intermittent pauses can be controlled. Slower rotation of the sector gear results in a longer printing pause time, suitable for low-temperature conditions; conversely, faster rotation of the sector gear is suitable for high-temperature conditions.

[0056] In Example 5, based on Example 4, the heat transfer lifting device includes a drive plate 30 disposed on the upper end of the printing box 7, and lifting plates 31 are vertically installed at the front and rear ends of the drive plate 30, and the two lifting plates 31 are vertically slidably fitted on the frame 1.

[0057] The heat transfer lifting device also includes a crank 32 rotatably connected to the frame 1 in the longitudinal direction. A connecting rod 33 is rotatably connected to the outer edge of the crank 32 in the longitudinal direction. The other end of the connecting rod 33 is rotatably connected to the front end face of the lifting plate 31 in the longitudinal direction. A sixth gear 34 is coaxially mounted on the shaft of the crank 32. The sixth gear 34 meshes with the fifth gear 27, which satisfies the condition that the first sector gear 29 drives the printing box 7 to complete one lifting and lowering operation after being driven by the fifth gear 27 and the sixth gear 34. Specifically, the crank 32 is rotatably mounted on the frame 1, the sixth gear 34 is coaxially fixed on the shaft of the crank 32, the connecting rod 33 is rotatably connected to the outer edge of the crank 32, the lifting plate 31 is rotatably connected to the end of the connecting rod 33, the drive plate 30 is fixed to the top of the lifting plate 31, and the printing box 7 is connected to the upper end of the drive plate 30. The sixth gear 34 meshes with the fifth gear 27, and the lifting plate 31 is vertically slidably mounted on the frame 1, forming a crank 32 slider-type lifting structure, which drives the printing box 7 to complete the vertical lifting and lowering action.

[0058] During operation, the temperature sensor collects the operating temperature in real time and transmits the temperature signal to the drive motor 28. The motor adjusts its output speed according to a preset program, adapting to high and low temperature conditions. It speeds up in high temperature conditions and slows down in low temperature conditions, achieving temperature-sensor-linked speed regulation. When the drive motor 28 starts, it drives the first sector gear 29 on the output shaft to rotate. The sector gear meshes with the fifth gear 27, transmitting power to the first drive shaft 17, which drives the speed regulation mechanism. At the same time, the fifth gear 27 meshes with the sixth gear 34, diverting power to the crank 32 assembly. The intermittent meshing characteristic of the sector gear can control the crank 32 to rotate once, achieving a single lifting action. The rotation of the sixth gear 34 drives the crank 32 to rotate coaxially. The crank 32 pulls the connecting rod 33 to perform a swing arm motion. The connecting rod 33 then pulls the lifting plate 31 to slide vertically along the frame 1, driving the drive plate 30 and the printing box 7 to complete the complete action of "descending-pausing printing-rising". One rotation of the crank 32 completes one lifting and lowering of the printing box 7, corresponding to one thermal transfer printing. The timing of the actions is precise and there are no redundant actions. In this embodiment, the crank 32 and connecting rod 33, in conjunction with the vertically sliding lifting plate 31, provide strong transmission rigidity and precise vertical displacement. The printing box 7 moves without shaking or shifting during lifting and lowering, ensuring uniform adhesion between the print head, the ribbon, and the substrate to be printed. A single drive motor 28 provides power to both the speed regulation mechanism and the lifting mechanism, eliminating the need for multiple separate motors, reducing the number of power components, simplifying the overall structure, and lowering equipment costs and failure rates.

[0059] Poor print quality is caused by loose adhesion between the ribbon and the printhead during the heat transfer process. Additionally, after printing, the packaging paper may sometimes fail to be conveyed with the ribbon due to static electricity or the printing process itself, affecting subsequent printing.

[0060] Based on the above problems, in Embodiment Six, building upon Embodiment Five, the thermal transfer printing apparatus resistant to high and low temperatures and temperature sensing further includes two ribbon adsorption and release mechanisms 35. The two ribbon adsorption and release mechanisms 35 are respectively mounted on the frame 1 and positioned on the front and rear sides of the thermal transfer printing mechanism 2.

[0061] The carbon ribbon adsorption-relaxation mechanism 35 includes an adsorption suction cup group 36 and a relaxation suction cup group 39. The adsorption suction cup group 36 is arranged outside the relaxation suction cup group 39, and the two are arranged at intervals along the longitudinal direction.

[0062] The suction cup group 36 includes two horizontally spaced suction cups 36, each with its suction cup opening facing downwards and slightly above the top surface of the ribbon. Each suction cup 36 has a suction cup rod 37 communicating with its interior. The suction cup rod 37 is hollow and connected to a vacuum pump 38 mounted on the frame 1. The vacuum pump 38 is connected to a control device 6. Specifically, the suction cup group 36 includes two horizontally spaced suction cups 36 with their suction cup openings facing downwards and slightly above the top surface of the ribbon, paired with hollow suction cup rods 37. Both suction cup rods 37 are connected to the vacuum pump 38 on the frame 1. The vacuum pump 38 is controlled by the control device 6 and uses negative pressure suction to achieve ribbon adsorption and positioning, ensuring a tight fit between the ribbon and the printhead.

[0063] The set of 39 release suction cups includes two horizontally spaced release suction cups 39, each with its opening facing downwards and higher than the suction cup 36. Each release suction cup 39 has a release rod 40 communicating with the interior of the cup body. The release rod 40 is hollow and is connected to an air-blowing device 41 mounted on the frame 1. The air-blowing device 41 is connected to a control device 6. Specifically, the set of 39 release suction cups includes two horizontally spaced release suction cups 39 with their openings facing downwards and their installation height higher than the suction cup 36, and is equipped with hollow release rods 40. The two release rods 40 are connected to the air-blowing device 41 on the frame 1. The air-blowing device 41 is also controlled by the control device 6, and uses forward air blowing to loosen the packaging paper, helping it to be smoothly ejected after printing and preventing it from adhering to the print head.

[0064] During operation, when the thermal transfer printing mechanism 2 descends to prepare for printing, the control device 6 activates the vacuum pump 38. The suction cup 36 generates negative pressure through the hollow suction cup rod 37, which flattens and fixes the ribbon, eliminating the risk of ribbon wrinkles and warping, and ensuring that the ribbon adheres tightly to the print head throughout the printing process, guaranteeing uniform transfer. Throughout the printing operation, the vacuum pump 38 maintains continuous negative pressure suction, firmly fixing the ribbon position and preventing ribbon displacement or loosening during printing. When printing is complete and the thermal transfer printing mechanism 2 rises to reset, the control device 6 shuts off the vacuum pump 38 and activates the air blowing device 41. The suction cup 39 releases air downwards through the hollow release rod 40, blowing away static electricity between the packaging paper and the ribbon, while simultaneously pushing the packaging paper away from the print head and smoothly conveying it out with the ribbon, preventing packaging paper from getting stuck.

[0065] In this embodiment, 36 sets of negative pressure suction cups are used to flatten and tighten the ribbon, completely solving the problems of loose adhesion, warping, and wrinkling between the ribbon and print head during printing. 39 sets of positive air-blowing release suction cups are used to eliminate electrostatic attraction between the packaging paper and the ribbon, and to actively push the packaging paper through airflow, fundamentally solving the problem of packaging paper sticking or adhering due to static electricity or printing. This ensures smooth printing in the next cycle and improves the stability of continuous operation. The suction and release actions are precisely linked with the printing, lifting, and conveying actions. The suction and fixation during printing and the air-blowing to loosen the ribbon after printing are seamlessly connected without conflict, and do not affect the original lifting and speed adjustment processes.

[0066] Example 7, based on Example 6, also includes two intermittent regulating valves 42 installed on the frame 1, each intermittent regulating valve 42 being configured to correspond to the corresponding side carbon belt adsorption and release mechanism 35; The intermittent regulating valve 42 includes a valve housing 43 mounted longitudinally on the frame 1, and a valve core 44 slidably connected laterally inside the valve housing 43. The upper end of the valve housing 43 is provided with a vacuum gas adsorption port 45 and a blown gas inlet 46; the lower end is provided with a vacuum gas inlet 47 and a blown gas outlet 48. The vacuum gas adsorption port 45 and the vacuum gas inlet 47 are on the same side and correspondingly arranged, as are the blown gas inlet 46 and the blown gas outlet 48. Vertically penetrating vacuum gas... When the valve core 44 moves laterally to the extreme positions on both sides, the vacuum gas inlet 47, vacuum gas channel 49, and vacuum gas adsorption port 45 are respectively opened, or the blow-up gas outlet 48, blow-up gas channel 50, and blow-up gas inlet 46 are opened. The vacuum gas adsorption port 45 is connected to the vacuum pump 38, and the blow-up gas inlet 46 is connected to the blow-up device 41. The vacuum gas inlet 47 is connected to each suction cup rod 37, and the blow-up gas outlet 48 is connected to each release rod 40.

[0067] Limit switches 51 are provided on both the left and right sides inside the valve housing 43. The limit switches 51 are electrically connected to the control device 6. When the valve core 44 moves to the left or right limit position, the limit switch 51 on the corresponding side is triggered to open the vacuum pump 38 to open the vacuum channel, or to open the air blowing device 41 to open the air blowing channel. A sliding hole 52 is provided at the upper end of the valve housing 43, and a fixed rod 53 that slides within the sliding hole 52 is installed at the upper end of the valve core 44. A transverse movement transmission mechanism 54 is provided between the two fixed rods 53. The transverse movement transmission mechanism 54 is powered by a first sector gear 29, which drives the two valve cores 44 to move laterally via the transverse movement transmission mechanism 54. Specifically, the valve body includes a valve housing 43 that is longitudinally fixed to the frame 1 and a valve core 44 that slides laterally within the valve housing 43. A fixed rod 53 is provided at the upper end of the valve core 44, which passes through the sliding hole 52 at the top of the valve housing 43 for connecting the transmission components. Limit switches 51 are built into the left and right sides of the valve housing 43. The limit switches 51 are electrically connected to the control device 6 for triggering the start and stop of the vacuum pump 38 and the gas blowing device 41. When the valve core 44 moves to its limit position, only one gas path is opened, realizing single-path switching between vacuum and gas blowing, and preventing cross-flow of gas. Vacuum gas adsorption port 45 is connected to vacuum pump 38, and blown gas inlet 46 is connected to blown gas device 41; vacuum gas inlet 47 is connected to suction cup rod 37, and blown gas outlet 48 is connected to release rod 40, ensuring a leak-free gas path. A lateral movement transmission mechanism 54 is provided between the fixing rods 53 of the two valve core bodies 44. This mechanism is powered by the first sector gear 29. Relying on the rotation of the sector gear, it synchronously drives the lateral movement of the valve core bodies 44 on both sides, realizing the mechanical linkage between pneumatic switching and printing lifting action.

[0068] During operation, after the sector gear drives the lifting device, when it rotates to the other side, the lateral movement transmission mechanism 54 drives the valve core 44 to move laterally to the left limit position, triggering the left limit switch 51. At this time, the vacuum gas channel 49 inside the valve core 44 aligns with the vacuum gas adsorption port 45 and vacuum gas inlet 47 of the valve shell 43, opening the vacuum path. The control device 6 starts the vacuum pump 38, and the adsorption suction cup 36 generates negative pressure, tightening the carbon ribbon to ensure perfect contact between the print head and the carbon ribbon, thus guaranteeing print quality. As the lateral movement transmission mechanism 54 is driven again and printing ends, the first sector gear 29 continues to rotate, driving the lateral movement transmission mechanism 54 to move the valve core 44 laterally to the right limit position, triggering the right limit switch 51. At this time, the gas passage 50 inside the valve core 44 aligns with the gas inlet 46 and gas outlet 48 of the valve housing 43, opening the gas path. The control device 6 shuts off the vacuum pump 38, starts the gas blowing device 41, releases the suction cup 39 to blow air downwards, reliably blowing the packaging bag off the print head so that it fits perfectly onto the ribbon, facilitating its transport with the ribbon. After the sector gear completes one intermittent rotation, the valve core 44 returns to the middle position with the transmission mechanism, and both gas paths are closed. Waiting for the next printing cycle, the gas path switching is precise and without delay.

[0069] In this embodiment, the first sector gear 29 drives the valve core 44 to move, achieving purely mechanical synchronization of printing, ribbon adsorption, and air release. This completely avoids action misalignment caused by electrical control signal delays and program malfunctions. The air path switching and printing lifting actions are completely synchronized, eliminating timing disorders. At the same time, the valve core 44 has built-in independent vacuum and air blowing channels. After lateral movement, only a single set of air paths is opened, and the vacuum and air blowing air paths are completely isolated, preventing problems such as negative and positive pressure cross-flow, adsorption, and air blowing failure. In addition, there is no need to add an independent motor or drive component. The power of the first sector gear 29 of the original drive motor 28 is directly reused, reducing the number of parts in the whole machine, lowering equipment costs and failure probability, and making the structure more compact.

[0070] Example 8, based on Example 7, includes a lateral movement mechanism comprising a longitudinal rod 55 connected between two fixed rods 53, one end of the longitudinal rod 55 connected to a sliding block 56, the sliding block 56 being laterally slidably connected to the frame 1, a spur gear being laterally mounted at the lower end of the sliding block 56, and a swing rod 58 longitudinally rotatably connected to the frame 1, the upper end of the swing rod 58 being mounted with a second sector gear 59, the rotation center of the second sector gear 59 being coaxially arranged with the rotation center of the swing rod 58, and the other end of the swing rod 58 having an elongated hole 60; the second sector gear 59 meshes with the spur gear. It also includes a rotating disk 61 rotatably connected to the frame 1, a fixing pin 62 longitudinally installed on the end face of the outer edge of the rotating disk 61, the fixing pin 62 slidingly engaged in the elongated hole 60, and a seventh gear 63 coaxially installed on the rotating disk 61, the seventh gear 63 meshing with the first sector gear 29.

[0071] During operation, the drive motor 28 drives the first sector gear 29 to rotate. The first sector gear 29 meshes with the seventh gear 63, transmitting power to the rotating disk 61 and driving it to rotate coaxially at a constant speed. The fixing pin 62 on the outer edge of the rotating disk 61 moves in a circular motion synchronously with the disk. The fixing pin 62 is always slidably engaged in the elongated hole 60 of the swing rod 58. Through the sliding engagement structure of the pin hole, the continuous rotational motion of the rotating disk 61 is converted into the reciprocating oscillating motion of the swing rod 58 around its own axis. When the swing rod 58 oscillates back and forth, the second sector gear 59, coaxial at its upper end, rotates in a sector-shaped reciprocating motion synchronously. The second sector gear 59 continuously meshes with the spur gear at the lower end of the sliding block 56, converting the oscillation into a transverse linear drive, pushing the sliding block 56 to slide transversely in a linear reciprocating motion along the frame 1. When the sliding block 56 slides laterally, it synchronously drives the valve core 44 of the intermittent regulating valves 42 on both sides to move laterally via the longitudinal rod 55. This allows the valve core 44 to move precisely to its left and right limit positions, triggering the corresponding limit switch 51. This completes the switching of the air path between vacuum adsorption and air release, and is synchronized with the printing lifting and lowering action throughout the process. This achieves both adsorption and release processes during printing.

[0072] In this embodiment, the smooth conversion from rotary motion to reciprocating linear motion is achieved through the combined structure of the rotating disk 61, the swing rod 58, and the sector gear. The power of the first sector gear 29 of the drive motor 28 is reused, eliminating the need for independent electrical control and additional drive components. The air circuit switching action is completely synchronized with the printing lifting and ribbon conveying actions, ensuring the overall machine operation sequence.

[0073] In Example 9, based on Example 8, the carbon belt conveyor 4 includes a first roller 64, a second roller 65, a third roller 66, and a fourth roller 67 arranged longitudinally and rotatably on the frame 1, and arranged sequentially from left to right; a fifth roller 68 arranged longitudinally and rotatably on the frame 1, and positioned below the second roller 65; and a sixth roller 69 and a seventh roller 70 arranged longitudinally and rotatably on the frame 1, and positioned between the second roller 65 and the fifth roller 68.

[0074] The carbon belt starts from the first roller 64, passes over the sixth roller 69, goes around the underside of the fifth roller 68, exits over the seventh roller 70, goes around the fourth roller 67, the third roller 66, and the second roller 65, and then returns to the first roller 64. The shaft of the fifth roller 68 is coaxially connected to the shaft of the first conical wheel 13. Specifically, the roller assembly is longitudinally rotated and mounted on the frame 1, arranged in a staggered distribution, and is divided into two categories: conveying guide rollers and tension regulating rollers. The first roller 64, the second roller 65, the third roller 66, and the fourth roller 67 are arranged in the horizontal direction from left to right, forming the main conveying circuit of the carbon belt. The fifth roller 68 is located directly below the second roller 65 and is a power input roller. Its rotating shaft is coaxially connected to the rotating shaft of the lower first conical wheel 13, receiving the power of the speed regulating mechanism to drive the carbon belt. The sixth roller 69 and the seventh roller 70 are located between the second roller 65 and the fifth roller 68, and play the role of changing the direction of the carbon belt and tightening the tension to prevent the carbon belt from loosening or running off-center. In this embodiment, the ribbon is tensioned by multiple reversals through the staggered arrangement of the sixth and seventh rollers and the fifth roller 68, which completely solves the problems of slack, sagging and warping during the ribbon transport process, ensuring that the ribbon is straight throughout the process and fits tightly with the print head, and preventing blurry transfer and text offset caused by ribbon slack.

[0075] In Example 10, based on Example 9, the control device 6 includes a display screen 71, a control switch 72, and a controller. These are used to control the timing and operating status of each device.

[0076] In Example 11, based on Example 10, the circumferential angle of the effective teeth of the first sector gear 29 is greater than 180 degrees. Since the fifth gear 27 is located on the right and the seventh gear 63 on the left, the first sector gear 29 can begin driving the seventh gear 63 before the fifth gear 27 has finished driving it. This ensures that the lifting device of the hot-pressing machine begins to move before reaching the printing limit position, guaranteeing that the vacuum channel remains open after it reaches the printing station. Simultaneously, the first sector gear 29 can begin driving the fifth gear 27 before the seventh gear 63 has finished driving it. This ensures that the air duct is open after printing is complete, before the print head leaves the printing position.

[0077] In Example 12, based on Example 11, a longitudinally arranged pressure roller 73 is provided on the frame 1. The pressure roller 73 is located on the inlet side of the print head and above the ribbon. The rotation of the pressure roller 73 can be achieved by a pulley at the end, a belt structure, and a power connection between the pressure roller 73 and the fifth roller body 68.

[0078] In Example 13, based on Example 12, springs are provided at both ends of the pressure roller 73, allowing it to move vertically and provide downward clamping force. For belt tensioning, multiple tensioning rollers 74 are provided to offer displacement margin and tension during the vertical movement of the pressure roller 73. The movement distance of this pressure roller 73 is very small, which can be offset by the tensioning rollers 74.

[0079] In Example 13, based on Example 12, the air blowing device 41 is a blower.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high and low temperature resistant and temperature sensing thermal transfer printing device, comprising a rack (1), characterized in that, The frame (1) is equipped with a heat transfer printing mechanism (2), a heat transfer lifting mechanism (3), a ribbon conveying mechanism (4), a power transmission mechanism (5), a temperature sensor, and a control device (6). The thermal transfer printing mechanism (2) includes a printing box (7) mounted on a frame (1), and a thermal printhead assembly is provided inside the printing box (7) to achieve thermal transfer after controlled heating; The heat transfer lifting mechanism (3) is connected to the printing box (7) and is used to drive the heat transfer printing mechanism (2) to lift. The ribbon conveying mechanism (4) is located below the thermal transfer execution mechanism to facilitate ribbon conveying below the thermal printhead assembly; The power transmission mechanism (5) includes a drive mechanism (8) and a speed adjustment mechanism (9); the drive mechanism (8) is mounted on the frame (1) and is used to provide power input to the heat transfer lifting mechanism (3) and the ribbon conveying mechanism (4); the speed adjustment mechanism (9) is mounted on the frame (1) and is connected to the drive mechanism (8), the heat transfer lifting mechanism (3) and the ribbon conveying mechanism (4) respectively, and satisfies the need to adjust the transmission ratio between the heat transfer lifting mechanism (3) and the ribbon conveying mechanism (4); The temperature sensor is installed on the frame (1) and placed above the carbon belt conveyor (4) to sense the temperature and control the power input of the power transmission mechanism (5); The control device (6) is electrically connected to the thermal transfer printing mechanism (2), the thermal transfer lifting mechanism (3), the ribbon conveying mechanism (4), the temperature sensor, and the power transmission mechanism (5), respectively.

2. The thermal transfer printing device resistant to high and low temperatures and temperature sensing according to claim 1, characterized in that, The speed adjustment mechanism (9) includes a housing (10) mounted on a frame (1). The housing (10) contains a first speed-regulating wheel system (11) and a second speed-regulating wheel system (12) that are horizontally arranged vertically and cooperate with each other. The speed-regulating wheel system includes a first conical wheel (13) and a second conical wheel (14) that are opposite each other. The outer end face of the upper first conical wheel (13) is coaxially connected to a translation shaft (15). The translation shaft (15) is rotatably connected to a first moving disk (16). The portion of the rear end of the translation shaft (15) that extends out of the first moving disk (16) is axially slidably connected to a first drive shaft (17). The first drive shaft (17) is rotatably connected to the housing (10). The upper second conical wheel (14) is rotatably connected inside the housing (10). The second conical wheel at the lower end is coaxially rotatably connected to the second movable disk (18) on its outer end face. The first conical wheel (13) at the lower end is rotatably connected inside the housing (10). It also includes guide rods (19) that are longitudinally rotatably connected to the housing (10) on the upper and lower sides of the continuously variable speed wheel system. The first movable disk (16) and the second movable disk (18) are respectively threaded onto the guide rods (19) corresponding to them. The four sets of guide rods (19) are driven to rotate by the gear adjustment mechanism (20) installed in the housing (10). The first drive shaft (17) extends to the outside of the housing (10) and is poweredly connected to the input end of the heat transfer lifting device. The shaft of the first conical wheel (13) at the lower end is connected to the input end of the carbon belt conveying mechanism (4). A metal conical belt is sleeved between the first speed-regulating wheel system (11) and the second speed-regulating wheel system (12). The gear adjustment mechanism (20) is electrically connected to the control device (6).

3. The heat transfer printing device according to claim 2, wherein The gear adjustment mechanism (20) includes a first gear (21) coaxially connected to four sets of guide rods (19), a second gear (22) rotatably connected inside the housing (10) meshing between the first gear (21) on the two sets of guide rods (19) on the same movable disk, a third gear (23) coaxially mounted on the second gear (22), a fourth gear (24) rotatably connected inside the housing (10) meshing between the two sets of third gears (23), the fourth gear (24) being connected to an adjuster (25) mounted on the housing (10), and the adjuster (25) being electrically connected to the control device (6).

4. The heat transfer printing device according to claim 3, wherein The regulator (25) has an adjustment shaft (26) which is coaxially connected to the shaft of the fourth gear (24); The regulator (25) is equipped with a pointer for indicating the current speed regulation ratio.

5. The heat transfer printing device according to claim 4, wherein The first drive shaft (17) is coaxially mounted with the fifth gear (27); The drive mechanism (8) includes a drive motor (28) mounted on the frame (1). The output shaft of the drive motor (28) is coaxially mounted with a first sector gear (29), which meshes with the fifth gear (27). The drive motor (28) is electrically connected to a temperature sensor for controlled adjustment of the rotation speed of the drive motor (28).

6. The thermal transfer printing apparatus resistant to high and low temperatures and temperature sensing according to claim 5, characterized in that, The heat transfer lifting device includes a drive plate (30) set on the upper end of the printing box (7), and lifting plates (31) are vertically installed at the front and rear ends of the drive plate (30), and the two lifting plates (31) are vertically slidably fitted on the frame (1); The heat transfer lifting device also includes a crank (32) that is rotatably connected to the frame (1) in the longitudinal direction. A connecting rod (33) is rotatably connected to the outer edge end face of the crank (32) in the longitudinal direction. The other end of the connecting rod (33) is rotatably connected to the front end face of the lifting plate (31) in the longitudinal direction. A sixth gear (34) is coaxially mounted on the shaft of the crank (32). The sixth gear (34) meshes with the fifth gear (27) to satisfy the condition that the first sector gear (29) drives the printing box (7) to complete one lifting operation after being driven by the fifth gear (27) and the sixth gear (34).

7. The heat transfer printing device according to claim 6, wherein It also includes two ribbon adsorption and release mechanisms (35); the two ribbon adsorption and release mechanisms (35) are respectively set on the frame (1) and placed on the front and rear sides of the thermal transfer printing mechanism (2); The carbon ribbon adsorption-relaxation mechanism (35) includes an adsorption suction cup (36) group and a relaxation suction cup (39) group. The adsorption suction cup (36) group is disposed on the outside of the relaxation suction cup (39) group, and the two are arranged at intervals along the longitudinal direction. The adsorption suction cup (36) group includes two adsorption suction cups (36) arranged laterally at intervals, with the suction cup opening of each adsorption suction cup (36) facing downwards and slightly above the carbon ribbon; each of the two adsorption suction cups (36) has a suction cup rod (37) communicating with the inside of the suction cup, the suction cup rod (37) is hollow, and both suction cup rods (37) are connected to a vacuum pump (38) installed on the frame (1); the vacuum pump (38) is connected to a control device (6); The relaxation suction cup (39) group includes two relaxation suction cups (39) arranged laterally at intervals. The opening of each relaxation suction cup (39) faces downward and is higher than the adsorption suction cup (36). Both relaxation suction cups (39) have a relaxation rod (40) communicating with the inside of the plate body. The relaxation rod (40) is hollow. Both relaxation rods (40) are connected to an air blowing device (41) installed on the frame (1). The air blowing device (41) is connected to a control device (6).

8. The heat transfer printing device according to claim 7, wherein It also includes two intermittent regulating valves (42) installed on the frame (1), each intermittent regulating valve (42) being configured with a corresponding side carbon ribbon adsorption and release mechanism (35); The intermittent regulating valve (42) includes a valve housing (43) mounted longitudinally on a frame (1), and a valve core (44) slidably connected inside the valve housing (43). The upper end of the valve housing (43) is provided with a vacuum gas adsorption port (45) and a blown gas inlet (46); the lower end is provided with a vacuum gas inlet (47) and a blown gas outlet (48). The vacuum gas adsorption port (45) and the vacuum gas inlet (47) are on the same side and correspondingly arranged, as are the blown gas inlet (46) and the blown gas outlet (48). The valve core (44) is provided with a vertically penetrating vacuum gas channel (49) and a blown gas outlet (48). When the valve core (44) moves laterally to the extreme positions on both sides, the vacuum gas inlet (47), the vacuum gas channel (49), and the vacuum gas adsorption port (45) are respectively opened, or the blow-up gas outlet (48), the blow-up gas channel (50), and the blow-up gas inlet (46) are opened; the vacuum gas adsorption port (45) is connected to the vacuum pump (38), and the blow-up gas inlet (46) is connected to the blow-up device (41); the vacuum gas inlet (47) is connected to each of the suction cup rods (37), and the blow-up gas outlet (48) is connected to each of the release rods (40). Limit switches (51) are provided on both the left and right sides inside the valve housing (43). The limit switches (51) are electrically connected to the control device (6). When the valve core (44) moves to the extreme position to the left or right, the limit switch (51) on the corresponding side is triggered to open the vacuum pump (38) to open the vacuum channel, or to open the air blowing device (41) to open the air blowing channel. The valve housing (43) is provided with a sliding hole (52) at the upper end. The valve core (44) is provided with a fixed rod (53) that slides in the sliding hole (52) at the upper end. A transverse movement transmission mechanism (54) is provided between the two fixed rods (53). The transverse movement transmission mechanism (54) is powered by the first sector gear (29), so that the first sector gear (29) drives the two valve cores (44) to move laterally via the transverse movement transmission mechanism (54).

9. A thermal transfer printing device resistant to high and low temperatures and temperature sensing according to claim 8, characterized in that, The lateral movement mechanism includes a longitudinal rod (55) connected between two fixed rods (53), one end of the longitudinal rod (55) is connected to a sliding block (56), the sliding block (56) is laterally slidably connected to the frame (1), the lower end of the sliding block (56) is laterally mounted with a spur rack (57), and also includes a swing rod (58) longitudinally rotatably connected to the frame (1), the upper end of the swing rod (58) is mounted with a second sector gear (59), the rotation center of the second sector gear (59) is coaxially set with the rotation center of the swing rod (58), the other end of the swing rod (58) has an elongated hole (60); the second sector gear (59) meshes with the spur gear; It also includes a rotating disk (61) rotatably connected to the frame (1), a fixing pin (62) is longitudinally installed on the end face of the outer edge of the rotating disk (61), the fixing pin (62) is slidably fitted in the elongated hole (60), the seventh gear (63) is coaxially installed on the rotating disk (61), and the seventh gear (63) meshes with the first sector gear (29).

10. A thermal transfer printing apparatus resistant to high and low temperatures and temperature sensing according to claim 9, characterized in that, The carbon belt conveyor (4) includes a first roller (64), a second roller (65), a third roller (66), and a fourth roller (67) arranged longitudinally and rotatably on the frame (1) from left to right; a fifth roller (68) rotatably connected longitudinally on the frame (1) and located below the second roller (65); and a sixth roller (69) and a seventh roller (70) rotatably connected longitudinally on the frame (1) and located between the second roller (65) and the fifth roller (68). The carbon ribbon starts from the first roller (64), passes over the sixth roller (69) and then around the fifth roller (68), then passes over the seventh roller (70), then passes over the fourth roller (67), the third roller (66) and the second roller (65), and then returns to the first roller (64). The shaft of the fifth roller (68) is coaxially connected to the shaft of the first conical wheel (13).

Images