Thermal transfer ribbon printing assembly and thermal transfer printer
By using an automatic adjustment system composed of DC reducer motor and encoder in the thermal transfer printer, the accuracy and operation complexity of the tension control of carbon tape paper are solved, automatic adjustment and high-precision tension control are realized, and printing quality is improved.
Patent Information
- Application Number
- CN202422619042.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In existing thermal transfer printers, the tension control method of carbon tape paper collection and unwinding requires manual adjustment, with poor accuracy, and the existing equipment structure is complex or costly.
An automatic adjustment system consisting of a DC reducer motor, encoder, linear speed sensor, etc. is adopted. By monitoring the linear and angular velocity of the carbon tape paper, the controller adjusts the torque of the coiling and unwinding motor in real time to achieve tension balance.
It realizes automatic adjustment of the tension of the retracting and rolling of carbon tape paper, with a simple structure, small space occupancy, high control accuracy and good printing effect.
Smart Images
Figure CN223131646U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of thermal transfer printing, and particularly relates to a carbon ribbon printing assembly and a thermal transfer printer. Background Art
[0002] For a thermal transfer printer, the control methods for achieving the balance of carbon ribbon paper winding and unwinding (the diameter of the unwinding end of the roll will gradually decrease, while the diameter of the winding end will gradually increase) mainly include the following several types: One is to control the tension during unwinding through a friction pad. As the roll diameter changes, the friction force of the friction pad needs to be adjusted at any time. At the same time, the friction force will also decrease after long-term use of the friction pad. Another is to control the unwinding tension through a damper. Neither of the above two methods can automatically provide a constant winding and unwinding tension, and manual adjustment is required. The adjustment accuracy is poor, the operation is inconvenient, and the technical requirements for the operator are high. Another is to control through a magnetic powder brake. This method can provide precise tension control, but an additional controller needs to be installed, resulting in a complex structure, large space occupation, and a significant increase in cost. Content of the Utility Model
[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a carbon ribbon printing assembly with a simple structure, small space occupation, and capable of automatically adjusting the winding and unwinding tension.
[0004] In order to achieve the above purpose, the technical solution of the utility model is as follows: A carbon ribbon printing assembly includes a print head body, an unwinding chuck, a winding chuck, an unwinding motor, a winding motor, and a controller. An installation frame is arranged at the upper end of the print head body. The unwinding chuck, the winding chuck, the unwinding motor, and the winding motor are all installed on the installation frame. The unwinding motor is in transmission connection with the unwinding chuck, and the winding motor is in transmission connection with the winding chuck. The unwinding chuck is used for detachably clamping a carbon ribbon paper roll, and the winding chuck is used for detachably clamping a waste paper roll shaft. The unwinding end of the carbon ribbon paper roll is wound around the print head body in a U shape and wound on the waste paper roll shaft. A linear velocity measuring element for measuring the linear velocity of the carbon ribbon paper is arranged on the print head body. Angular velocity measuring elements are arranged at both the unwinding chuck and the winding chuck. The linear velocity measuring element, the winding motor, the unwinding motor, and the two angular velocity measuring elements are all electrically connected to the controller.
[0005] The beneficial effect of the above technical solution is that: when the carbon ribbon printing assembly is running, the unwinding motor is in a blocked state to provide unwinding resistance, and the rewinding motor rotates to provide rewinding power, and the carbon ribbon paper between the carbon ribbon roll and the waste paper reel is subjected to thermal transfer operation through the print head body. At this time, the linear speed measuring element can monitor the linear speed of the carbon ribbon paper, and the two angle measuring elements respectively monitor the angular speed of the carbon ribbon roll and the waste paper reel during rotation. As the reel diameter of the carbon ribbon roll and the waste paper reel changes during the rewinding and unwinding process, the controller can control the rewinding motor torque to gradually increase and the unwinding motor torque to decrease accordingly, so that the carbon ribbon paper maintains the rewinding and unwinding tension balance during the printing process.
[0006] The mounting frame in the above technical solution includes two support plates, the print head body is horizontally arranged in the left-right direction, the two support plates are vertically arranged at the two ends of the print head body in the front-back direction respectively, the unwinding chuck and the winding chuck are both arranged on the two support plates, and the unwinding motor and the winding motor are respectively arranged on any one of the support plates.
[0007] The beneficial effect of the above technical solution is that its structure is simple and it makes it easier to install the unwinding chuck and the rewinding chuck on the two support plates, especially the carbon ribbon roll and the waste paper reel can be placed between the two support plates to be clamped by the unwinding chuck and the rewinding chuck respectively.
[0008] The unwinding chuck in the above technical solution includes two first chucks, and the winding chuck includes two second chucks. The two first chucks are respectively arranged on the two support plates, and the two first chucks are aligned with each other. The two second chucks are respectively arranged on the two support plates, and the two second chucks are aligned with each other. The unwinding motor and the winding motor are arranged on the same support plate, and are respectively connected to the first chuck and the second chuck on the corresponding support plate.
[0009] The beneficial effect of the above technical solution is that its structure is simple, so that the carbon ribbon paper roll can be placed between the two first clamps and clamped on the two first clamps, and the waste paper roll is placed between the two second clamps and clamped on the two second clamps. At this time, the unwinding motor drives the corresponding first clamp to drive the carbon ribbon paper roll to rotate to unwind, and the winding motor drives the corresponding second clamp to drive the waste paper roll to rotate to rewind.
[0010] The winding motor and the unwinding motor in the above technical solution are respectively connected to the corresponding first chuck and second chuck through synchronous belt transmission.
[0011] The beneficial effect of the above technical solution is that the rewinding motor and the unwinding motor can be installed between the two support plates, thereby making the volume of the entire carbon ribbon printing assembly more compact.
[0012] In the above technical solution, the rewinding motor and the unwinding motor are both DC reduction motors.
[0013] The beneficial effect of the above technical solution is that its speed and torque are convenient to control, and the control accuracy is high.
[0014] In the above technical solution, the angular velocity measurement element is an encoder.
[0015] The beneficial effect of the above technical solution is that its measurement accuracy is high.
[0016] In the above technical solution, the linear velocity measurement element is a linear velocity sensor.
[0017] The beneficial effect of the above technical solution is that its measurement accuracy is high.
[0018] In the above technical solution, the mounting bracket further includes two spreading rollers, and the two spreading rollers are arranged on the front and back sides between the two support plates. The spreading rollers are horizontally arranged in the left-right direction, and both ends thereof are rotatably connected to the two support plates respectively. The two spreading rollers are used to spread the carbon tape paper.
[0019] The beneficial effect of the above technical solution is that by arranging the spreading rollers, the stability of the carbon tape paper during transportation can be better.
[0020] In the above technical solution, the spreading roller is a double spiral roller, and the thread directions at both ends thereof are opposite. The spreading roller is used to rotate under the traction of the carbon tape paper and perform anti-crease treatment on the carbon tape paper.
[0021] The beneficial effect of the above technical solution is that in this way, the spreading roller can perform anti-crease operation on the carbon tape paper, thereby improving the thermal transfer effect of the print head body.
[0022] The second object of the present invention is to provide a thermal transfer printer with a simple structure and balanced rewinding and unwinding of the carbon tape paper.
[0023] In order to achieve the above object, the technical solution of the present invention is as follows: A thermal transfer printer includes the carbon tape printing assembly as described above.
[0024] The beneficial effect of the above technical solution is that it has a simple structure and good thermal transfer effect, especially the rewinding and unwinding tensions of the carbon tape paper can be balanced. Description of the Drawings
[0025] Figure 1 It is the front view of the carbon tape printing assembly described in Embodiment 1 of the present invention;
[0026] Figure 2The front view of a partial carbon ribbon printing assembly according to Embodiment 1 of the present utility model;
[0027] Figure 3 The side view of a partial carbon ribbon printing assembly according to Embodiment 1 of the present utility model;
[0028] Figure 4 The schematic diagram of a carbon ribbon paper roll and a waste paper roll shaft clamped between two support plates in Embodiment 1 of the present utility model;
[0029] Figure 5 The schematic diagram of the running direction of the carbon ribbon paper in Embodiment 1 of the present utility model;
[0030] Figure 6 The electrical connection schematic diagram of the controller in Embodiment 1 of the present utility model.
[0031] In the figure: 1, the printing head body; 11, the mounting rack; 111, the support plate; 112, the spreading roller; 2a, the unwinding chuck; 21a, the first chuck; 2b, the winding chuck; 21b, the second chuck; 3a, the unwinding motor; 3b, the winding motor; 31, the synchronous belt; 4, the controller; 5, the carbon ribbon paper roll; 51, the carbon ribbon paper; 6, the waste paper roll shaft; 7, the linear velocity measuring element; 8, the angular velocity measuring element. Detailed implementation manners
[0032] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model. In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the accompanying drawings. According to the following description and the claims, the advantages and features of the present utility model will be described more clearly. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present utility model.
[0033] Embodiment 1
[0034] As Figures 1-6As shown in the figure, this embodiment provides a carbon ribbon printing assembly, which includes a print head body 1, an unwinding chuck 2a, a winding chuck 2b, an unwinding motor 3a, a winding motor 3b, and a controller 4. An installation frame 11 is provided at the upper end of the print head body 1. The unwinding chuck 2a, the winding chuck 2b, the unwinding motor 3a, and the winding motor 3b are all installed on the installation frame 11. The unwinding motor 3a is in driving connection with the unwinding chuck 2a, and the winding motor 3b is in driving connection with the winding chuck 2b. The unwinding chuck 2a is used to detachably hold the carbon ribbon paper roll 5, and the winding chuck 2b is used to detachably hold the waste paper reel 6. The unwinding end of the carbon ribbon paper roll 5 is wound around the print head body 1 in a U shape and wound on the waste paper reel 6. A linear velocity measuring element 7 for measuring the linear velocity of the carbon ribbon paper 51 is provided on the print head body 1. Angular velocity measuring elements 8 are provided at both the unwinding chuck 2a and the winding chuck 2b. The linear velocity measuring element 7, the winding motor 3b, the unwinding motor 3a, and the two angular velocity measuring elements 8 are all electrically connected to the controller 4. In this way, when the carbon ribbon printing assembly is running, the unwinding motor is in a stalled state to provide unwinding resistance, while the winding motor rotates to provide winding power. The carbon ribbon paper between the carbon ribbon paper roll and the waste paper reel undergoes thermal transfer operation through the print head body. At this time, the linear velocity measuring element can monitor the linear velocity of the carbon ribbon paper, and the two angular velocity measuring elements respectively monitor the angular velocity when the carbon ribbon paper roll and the waste paper reel rotate. As the diameters of the carbon ribbon paper roll and the waste paper reel change during the unwinding and winding processes, the controller can control the torque of the winding motor to gradually increase and the torque of the unwinding motor to decrease accordingly, so as to keep the unwinding and winding tensions of the carbon ribbon paper balanced during the printing process.
[0035] In this embodiment, the controller can adopt a single-chip microcomputer of the arm series, which can be set on any one of the support plates.
[0036] When the carbon ribbon printing assembly provided in this embodiment is running, by setting the unwinding motor to a stall state, at this time, the unwinding motor provides an unwinding resistance (that is, the unwinding motor rotates under the traction of the carbon ribbon paper against its own unwinding resistance), and the winding motor provides a winding power, which can make the carbon ribbon paper in a straightened state during transportation. However, since the diameter of the carbon ribbon paper roll will gradually decrease, and the diameter of the waste paper roll will gradually increase, in order to avoid excessive tension on the carbon ribbon paper due to excessive pulling, at this time, for the winding motor, its speed needs to gradually decrease, but the torque needs to gradually increase accordingly. Of course, at this time, it is better if the unwinding resistance applied by the unwinding motor can also gradually decrease. The specific principle is as follows. When the linear velocity measuring element 7 measures that the linear velocity of the carbon ribbon paper is v, and the angular velocity measuring element corresponding to the unwinding motor monitors that the angular velocity of the carbon ribbon paper roll is r1, then the real-time diameter R1 of the carbon ribbon paper roll can be calculated accordingly. The angular velocity measuring element corresponding to the winding motor monitors that the angular velocity of the waste paper roll is r2, then the real-time diameter R2 of the carbon ribbon paper roll can be calculated accordingly (it is possible to calculate the radius given the preconditions of the linear velocity and angular velocity, which belongs to the prior art in this field and will not be elaborated here). In order to keep v constant, that is, v is a fixed value, and R2 is a variable (and is gradually increasing), at this time, the controller will control the winding motor to gradually reduce its speed (that is, reduce the r1 value), but increase its torque. Similarly, R1 is a variable (and is gradually decreasing), at this time, the controller will control the winding motor to gradually reduce the torque (which reduces the unwinding resistance of the carbon ribbon paper roll).
[0037] As Figures 1-4 shown, in the above technical solution, the mounting bracket 11 includes two support plates 111. The print head body 1 is horizontally arranged in the left-right direction. The two support plates 111 are respectively vertically arranged at both ends of the print head body 1 in the front-back direction. The unwinding chuck 2a and the winding chuck 2b are both arranged on the two support plates 111. The unwinding motor 3a and the winding motor 3b are respectively arranged on any one of the support plates 111. Its structure is simple, and it makes the installation of the unwinding chuck and the winding chuck on the two support plates more convenient. In particular, the carbon ribbon paper roll 5 and the waste paper roll 6 can be placed between the two support plates to be clamped by the unwinding chuck and the winding chuck respectively. In this embodiment, the two support plates are parallel to each other
[0038] As Figures 1-4As shown, in the above technical solution, the unwinding chuck 2a includes two first chucks 21a, and the winding chuck 2b includes two second chucks 21b, the two first chucks 21a are respectively arranged on the two support plates 111, and the two first chucks 21a are aligned with each other, the two second chucks 21b are respectively arranged on the two support plates 111, and the two second chucks 21b are aligned with each other, the unwinding motor 3a and the winding motor 3b are arranged on the same support plate 111, and are respectively connected to the corresponding support plates 111. The first chuck 21a and the second chuck 21b are transmission connected, and the structure is simple, so that the carbon ribbon paper roll can be placed between the two first chucks and clamped on the two first chucks, and the waste paper roll is placed between the two second chucks and clamped on the two second chucks. At this time, the winding motor drives the corresponding second chuck to drive the waste paper roll to rotate to rewind (the unwinding motor is in a blocked state and passively rotates under the traction of the carbon ribbon paper to unwind the carbon ribbon paper roll). The unwinding chuck and the winding chuck can both adopt existing conventional safety chucks, which belong to the prior art.
[0039] like Figure 1 and Figure 3 As shown, the winding motor 3b and the unwinding motor 3a in the above technical solution are respectively connected to the corresponding first chuck 21a and second chuck 21b through a synchronous belt 31, so that the winding motor and the unwinding motor can be installed between the two support plates, thereby making the volume of the entire carbon ribbon printing assembly more compact; the winding motor 3b and the unwinding motor 3a are both DC reduction motors, and their speed and torque are easy to control and have high control accuracy.
[0040] In the above technical solution, the angular velocity measuring element 8 is an encoder (specifically, a code disk may be used); the linear velocity measuring element 7 is a linear velocity sensor, which has high measurement accuracy.
[0041] like Figure 1 , Figure 2 and Figure 5 As shown, the mounting frame 11 in the above technical solution also includes two stretching rollers 112, and the two stretching rollers 112 are arranged on the front and rear sides between the two support plates 111, and the stretching rollers 112 are horizontally arranged along the left and right directions, and the two ends thereof are rotatably connected to the two support plates 111 respectively, and the two stretching rollers 112 are used to stretch the carbon ribbon paper 51. By setting the stretching rollers, the stability of the carbon ribbon paper during transportation can be better. Preferably, the stretching rollers 112 are double-spiral rollers, and the thread directions at both ends are opposite. The stretching rollers 112 are used to rotate under the traction of the carbon ribbon paper 51 and de-wrinkle the carbon ribbon paper 51, so that the stretching rollers can de-wrinkle the carbon ribbon paper, thereby improving the thermal transfer effect of the print head body.
[0042] Embodiment 2
[0043] This embodiment provides a thermal transfer printer, including the carbon ribbon printing assembly as described in Embodiment 1. Its structure is simple and the thermal transfer effect is good. In particular, the winding and unwinding tensions of the carbon ribbon paper can be balanced.
[0044] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Any ordinary technician in the industry can smoothly implement the present invention according to what is shown in the accompanying drawings of the specification and the above description. However, any minor changes, modifications, and equivalent variations made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above are equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications, and variations made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims
1. A carbon ribbon printing assembly, characterized in that, It includes a print head body (1), an unwinding chuck (2a), a winding chuck (2b), an unwinding motor (3a), a winding motor (3b) and a controller (4). An installation frame (11) is provided at the upper end of the print head body (1). The unwinding chuck (2a), the winding chuck (2b), the unwinding motor (3a) and the winding motor (3b) are all installed on the installation frame (11). The unwinding motor (3a) is in transmission connection with the unwinding chuck (2a), and the winding motor (3b) is in transmission connection with the winding chuck (2b). The unwinding chuck (2a) is used to detachably hold a carbon tape roll (5), and the winding chuck (2b) is used to detachably hold a waste paper roll (6). The unwinding end of the carbon tape roll (5) is wound around the print head body (1) in a U shape and wound on the waste paper roll (6). A linear velocity measuring element (7) for measuring the linear velocity of the carbon tape (51) is provided on the print head body (1). Angular velocity measuring elements (8) are provided at both the unwinding chuck (2a) and the winding chuck (2b). The linear velocity measuring element (7), the winding motor (3b), the unwinding motor (3a) and the two angular velocity measuring elements (8) are all electrically connected to the controller (4).
2. The carbon ribbon printing assembly according to claim 1, characterized in that, The installation frame (11) includes two support plates (111). The print head body (1) is horizontally arranged in the left - right direction. The two support plates (111) are vertically arranged in the front - rear direction at both ends of the print head body (1) respectively. The unwinding chuck (2a) and the winding chuck (2b) are both arranged on the two support plates (111), and the unwinding motor (3a) and the winding motor (3b) are respectively arranged on any one of the support plates (111).
3. The carbon ribbon printing assembly according to claim 2, wherein The unwinding chuck (2a) includes two first chucks (21a), and the winding chuck (2b) includes two second chucks (21b). The two first chucks (21a) are respectively arranged on the two support plates (111) and are aligned with each other. The two second chucks (21b) are respectively arranged on the two support plates (111) and are aligned with each other. The unwinding motor (3a) and the winding motor (3b) are arranged on the same support plate (111) and are respectively in transmission connection with the first chuck (21a) and the second chuck (21b) on the corresponding support plate (111).
4. The carbon ribbon printing assembly according to claim 3, wherein, The winding motor (3b) and the unwinding motor (3a) are respectively in transmission connection with the corresponding first chuck (21a) and second chuck (21b) through a synchronous belt (31).
5. The carbon ribbon printing assembly according to claim 1, characterized in that, Both the winding motor (3b) and the unwinding motor (3a) are DC reduction motors.
6. The carbon ribbon printing assembly according to claim 1, characterized in that, The angular velocity measuring element (8) is an encoder.
7. The carbon ribbon printing assembly according to claim 1, wherein, The linear velocity measuring element (7) is a linear velocity sensor.
8. The carbon ribbon printing assembly according to claim 2, wherein The mounting bracket (11) further includes two spreading rollers (112). The two spreading rollers (112) are arranged on the front and rear sides between the two support plates (111). The spreading rollers (112) are horizontally arranged in the left-right direction, and both ends thereof are rotatably connected to the two support plates (111) respectively. The two spreading rollers (112) are used for spreading the carbon tape paper (51).
9. The carbon ribbon printing assembly according to claim 8, wherein The spreading roller (112) is a double spiral roller, and the thread directions at both ends thereof are opposite. The spreading roller (112) is used for rotating under the traction of the carbon tape paper (51) and performing wrinkle removal treatment on the carbon tape paper (51).
10. A thermal transfer printer, characterized in that, It includes the carbon tape printing assembly according to any one of claims 1-9.