Damping unwinding device of thermal transfer printer and thermal transfer printer

Abstract

The utility model relates to a kind of damping unwinding device and heat transfer printing machine of heat transfer printing machine, and the damping unwinding device of heat transfer printing machine includes unwinding roller and two groups of damping unwinding components, two groups of damping unwinding components are oppositely arranged, and the both ends of unwinding roller are respectively connected in damping unwinding component in damping mode;Damping unwinding component includes hug sleeve, support seat and tight screw, support seat is U-shaped structure, hug sleeve is embedded in the inner cavity of support seat, and the shaft head clamping channel that is formed with front and rear through in hug sleeve is equipped with fibre wear layer on inner side wall in shaft head clamping channel, and the both ends of unwinding roller are respectively inserted in corresponding shaft head clamping channel and with fibre wear layer adaptation abut;Adjusting interval that is communicated with shaft head clamping channel is set on hug sleeve, adjusting interval is communicated with adjusting interval front and rear, adjusting interval upper end is communicated with the upper end of U-shaped structure support seat, and tight screw is screw-connected on hug sleeve, and tight screw is respectively screw-connected with the hug sleeve of adjusting interval left and right sides by passing through adjusting interval.

Description

Technical Field

[0001] This utility model relates to the field of digital thermal transfer printing technology, specifically to a damping unwinding device for a thermal transfer printer and a thermal transfer printer. Background Technology

[0002] In the unwinding control process of printing presses, traditional technologies mostly adopt the "unwinding servo + tension sensor + PID control" scheme. Its core purpose is to maintain the tension stability during the unwinding process through the dynamic adjustment of the servo motor and the real-time feedback of the tension sensor, so as to adapt to the needs of rapid change of photo paper materials.

[0003] However, the aforementioned traditional solutions have significant drawbacks in practical applications: the unwinding servo generates a slight flickering phenomenon during operation. This flickering stems from electronic signal response delays (typically 10-50ms) and servo motor current fluctuations (fluctuation amplitude approximately 5%-15%), resulting in the unwinding roller's rotational speed being unable to achieve absolute stability, with fluctuations reaching ±2r / min. This slight flickering is directly transmitted to the photographic paper material, causing problems such as color deviation (deviation ≥0.1mm), misalignment, and horizontal lines during multicolor printing, severely affecting the accuracy and quality of printed products. This defect is particularly pronounced in wide-format photographic paper (width ≥500mm).

[0004] Furthermore, traditional servo control solutions suffer from complex structures, high costs (the procurement cost of servo systems and tension sensors accounts for 30%-40% of the total equipment cost), and difficult maintenance. The high annual failure rate of electronic components such as tension sensors and servo drives further reduces the operational stability of the equipment. Therefore, there is an urgent need for a damped unwinding control technology that can eliminate flickering, simplify the structure, reduce costs, and without compromising the ease of material changeover. Utility Model Content

[0005] This utility model addresses one or more technical problems existing in the prior art by providing a damping unwinding device for a thermal transfer printer and a thermal transfer printer.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a damping unwinding device for a thermal transfer printer, including an unwinding roller and two sets of damping unwinding assemblies. The two sets of damping unwinding assemblies are arranged opposite to each other, and the two ends of the unwinding roller are respectively dampedly connected to the damping unwinding assemblies. The damping unwinding assembly includes a sleeve, a support base, and a set screw. The support base has a U-shaped structure, and the sleeve is embedded in the inner cavity of the support base. A shaft head engaging channel is formed inside the sleeve, and a fiber abrasion-resistant layer is provided on the inner side wall of the shaft head engaging channel. The shaft heads at both ends of the unwinding roller are respectively inserted into the corresponding shaft head engaging channels and abut against the fiber abrasion-resistant layer. An adjustment interval is provided on the sleeve, which communicates with the shaft head engaging channel. The adjustment interval is continuous from front to back, and the upper end of the adjustment interval is connected to the upper end of the U-shaped support base. A set screw is threaded onto the sleeve, and the set screw passes through the adjustment interval and is threaded to the sleeve on the left and right sides of the adjustment interval, respectively.

[0007] The beneficial effects of this utility model are as follows: The damping unwinding device of the thermal transfer printer of this utility model, by setting a sleeve and setting a fiber wear-resistant layer inside the sleeve, realizes the unwinding tension stabilization bar through mechanical friction damping, eliminates the influence of flicker on multi-color printing, ensures that the printing deviation is ≤0.03mm, and at the same time retains the advantage of quick replacement of photo paper materials (replacement time ≤3 minutes), reducing equipment costs and maintenance difficulty.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the sleeve includes an integrally connected snap-fit ​​section and a locking section. The outer wall of the snap-fit ​​section has an arc-shaped structure that adapts to the bottom of the inner cavity of the support base. The shaft head snap-fit ​​channel is opened on the snap-fit ​​section. There are two locking sections arranged in parallel opposite directions, and the adjustment interval is formed between the two locking sections. The set screws are threaded onto the two locking sections respectively.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by setting the snap-fit ​​section and the locking section, it is convenient to snap-fit ​​and lock the shaft head of the unwinding roller, and adjust the tightness of the shaft head.

[0011] Furthermore, in the two locking sections, one locking section has a first threaded hole and an adjusting groove, and the other locking section has a second threaded hole. The first threaded hole and the second threaded hole are arranged coaxially opposite each other and are both connected to the adjusting interval. The adjusting groove is located at the end of the first threaded hole away from the adjusting interval. The support base has an operating channel. The adjusting groove is arranged coaxially with the first threaded hole and the operating channel and is connected to them.

[0012] The advantages of adopting the above-mentioned further solution are: by setting an adjustment groove, it is convenient to accommodate the screw head of the set screw; by setting an operating channel, it is convenient to insert an adjusting screwdriver to operate the set screw for tightness adjustment.

[0013] Furthermore, the inner diameter of the adjusting groove is larger than the inner diameter of the first threaded hole, and the screw head of the set screw is accommodated in the adjusting groove.

[0014] Furthermore, the inner diameter of the operating channel is larger than the inner diameter of the first threaded hole.

[0015] Furthermore, the inner cavity of the support seat includes a first connecting section and a second connecting section in sequence along the axial direction of the unwinding roller. The sleeve is embedded in the first connecting section. Bearings are respectively sleeved on the shaft ends of the unwinding roller. The bearings are embedded in the second connecting section of the corresponding inner cavity of the support seat. The shaft ends of the unwinding roller are rotatably connected to the support seat through the bearings.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by setting bearings, the assembly between the shaft head and the support seat becomes more stable and reliable.

[0017] Furthermore, the thickness of the fiber wear-resistant layer is 2~5mm.

[0018] Furthermore, the damping unwinding assembly also includes multiple adjusting shims, each with a different thickness, and the adjusting shims can be inserted into the adjusting interval for adjustment and positioning.

[0019] The beneficial effect of adopting the above-mentioned further solution is that by setting an adjusting shim, the tightness of the set screw can be adjusted according to the adjusting shim.

[0020] Furthermore, the adjusting shim is a metal sheet.

[0021] This utility model also provides a thermal transfer printer, including a thermal transfer printer body and a damping unwinding device for a thermal transfer printer as described above. The damping unwinding device is installed on the thermal transfer printer body, and the thermal transfer printer body is a digital thermal transfer printer.

[0022] The beneficial effects of this utility model are: 1. Complete elimination of flicker: Mechanical friction damping replaces traditional servo electronic adjustment, eliminating electronic interference issues such as signal delay and current fluctuation. Friction fluctuation between the sleeve and the unwind roller shaft is ≤±3%, and unwind roller speed fluctuation is ≤±0.3r / min. This completely solves the problem of minor flicker in servo unwinding. Multi-color printing misregistration can be controlled within 0.03mm, effectively avoiding printing defects such as color deviation and horizontal lines, and improving product qualification rate by 15%-20%. 2. Convenient operation and maintenance: The damping force can be precisely adjusted by simply adjusting the set screw with a torque wrench, without the need for professional electronic parameter debugging skills; the installation and disassembly process is simple, with the unwinding roller taking ≤3 minutes to install and remove, fully meeting the needs of rapid replacement of photographic paper materials; daily maintenance only requires periodic inspection of wear and screw tightness, reducing maintenance costs; 3. Reliable and durable structure: The fiber wear-resistant layer has low friction loss and long service life; the overall structure has no expensive electronic components, which greatly reduces the initial investment cost of the equipment, the risk of electronic failure is almost zero, and the average fault-free operation time of the equipment is improved. 4. Wide range of compatibility: The damping force can be continuously adjusted within the range of 3~25N・m by adjusting the screw tightness, which can match different specifications of photo paper materials. It is also suitable for various ribbon printing processes such as thermal and thermal transfer, and its compatibility is significantly better than traditional servo control solutions. Attached Figure Description

[0023] Figure 1 This is a side view of the damping unwinding device of the thermal transfer printer of this utility model. Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA; Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 This is a top view of the damping unwinding device of the thermal transfer printer of this utility model. Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of BB; Figure 6 for Figure 5 A magnified structural diagram of section B.

[0024] The attached diagram lists the components represented by each number as follows: 1. Unwinding roller; 11. Shaft end; 2. Sleeve; 21. Fiber abrasion-resistant layer; 22. Adjustment interval; 23. Snap-fit ​​section; 24. Locking section; 25. First threaded hole; 26. Second threaded hole; 27. Adjustment groove; 3. Support base; 31. Operating channel; 32. Bearing; 4. Set screw. Detailed Implementation

[0025] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0026] Example 1 like Figures 1-6 As shown, a damping unwinding device for a thermal transfer printer according to this embodiment includes an unwinding roller 1 and two sets of damping unwinding assemblies. The two sets of damping unwinding assemblies are arranged opposite to each other, and the two ends of the unwinding roller 1 are respectively dampedly connected to the damping unwinding assemblies. The damping unwinding assembly includes a sleeve 2, a support base 3, and a set screw 4. The support base 3 has a U-shaped structure, and the sleeve 2 is embedded in the inner cavity of the support base 3. A through-type shaft head engaging channel is formed within the sleeve 2, and a fiber abrasion-resistant layer 21 is provided on the inner wall of the engaging channel. The shaft heads 11 at both ends of the unwinding roller 1 are respectively inserted into the corresponding engaging channels and abut against the fiber abrasion-resistant layer 21. An adjustment interval 22 communicating with the engaging channel is provided on the sleeve 2. The adjustment interval 22 is through-type, and its upper end is connected to the upper end of the U-shaped support base 3. A set screw 4 is threaded onto the sleeve 2, passing through the adjustment interval 22 and threadedly connected to the sleeve 2 on the left and right sides of the adjustment interval 22. The set screw 4 is arranged perpendicularly to the unwinding roller 1. There can be one or more set screws 4.

[0027] Specifically, in this embodiment, the thickness of the fiber abrasion-resistant layer 21 is 2-5 mm, and the thickness can be selected as 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, and 5 mm, etc. The sleeve 2 is also U-shaped, except that the adjacent arrangement of the two arms forms the adjustment interval 22.

[0028] The core components of this embodiment include a sleeve 2, a set screw 4, and a fiber wear-resistant layer 21. The sleeve 2 has a fiber wear-resistant layer 21 inside. The inner diameter of the fiber wear-resistant layer 21 is adapted to the shaft head 11 of the unwinding roller 1 of the ribbon printing machine, allowing it to tightly fit onto the shaft head 11. The fiber wear-resistant layer 21 is adhered and fixed to the inner wall of the sleeve 2. It is made of carbon fiber composite material, including matrix fibers and wear-resistant reinforcing components dispersed in the matrix fibers. It is commercially available and does not easily wear during long-term friction use, maintaining the stability of the damping force. At least one threaded hole can be provided on the sleeve 2. The set screw 4 engages with the threaded hole. By tightening or loosening the set screw 4, the pressure between the fiber wear-resistant layer 21 and the shaft head 11 of the unwinding roller 1 can be adjusted, thereby controlling the magnitude of the frictional force between them. This ensures that the sleeve 2 and the shaft head 11 fit tightly without gaps, while also facilitating disassembly and assembly. The shaft head 11 has chamfered ends to guide its smooth installation within the sleeve 2.

[0029] The damping unwinding device of the thermal transfer printer in this embodiment uses a sleeve with a fiber abrasion-resistant layer inside to achieve unwinding tension stabilization through mechanical friction damping. This eliminates the impact of flickering on multi-color printing, ensuring that the registration deviation is ≤0.03mm, while retaining the advantage of quick paper replacement (replacement time ≤3 minutes), reducing equipment costs and maintenance difficulty.

[0030] Example 2 Based on Embodiment 1, this embodiment provides a preferred structure for the sleeve 2. For example... Figure 1 and Figure 6 As shown, the sleeve 2 in this embodiment includes an integrally connected snap-fit ​​section 23 and a locking section 24. The outer wall of the snap-fit ​​section 23 has an arc-shaped structure that adapts to the bottom of the inner cavity of the support base 3. The shaft head snap-fit ​​channel is opened on the snap-fit ​​section 23. There are two locking sections 24 arranged in parallel opposite directions, forming the adjustment interval 22 between the two locking sections 24. The set screws 4 are threaded onto the two locking sections 24 respectively. By setting the snap-fit ​​section and the locking section, it is convenient to snap and lock the shaft head of the unwinding roller and adjust the tightness of the shaft head.

[0031] like Figure 6 As shown, in this embodiment, one locking segment 24 has a first threaded hole 25 and an adjusting groove 27, and the other locking segment 24 has a second threaded hole 26. The first threaded hole 25 and the second threaded hole 26 are coaxially arranged opposite each other and both communicate with the adjusting interval 22. The adjusting groove 27 is located at the end of the first threaded hole 25 away from the adjusting interval 22. The support base 3 has an operating channel 31. The adjusting groove 27 is coaxially arranged with and communicates with the first threaded hole 25 and the operating channel 31, respectively. Figure 6 (Even with different shafts, it can meet the usage requirements). An adjustment slot is provided to easily accommodate the head of the set screw; an operating channel is provided to easily insert an adjusting screwdriver to operate the set screw for tightness adjustment.

[0032] Specifically, in this embodiment, the inner diameter of the adjusting groove 27 is larger than the inner diameter of the first threaded hole 25, and the screw head of the set screw 4 is housed in the adjusting groove 27; the inner diameter of the operating channel 31 is larger than the inner diameter of the first threaded hole 25.

[0033] Example 3 Based on Embodiment 1 or Embodiment 2, the inner cavity of the support base 3 in this embodiment includes a first connecting section and a second connecting section sequentially along the axial direction of the unwinding roller 1. The sleeve 2 is embedded in the first connecting section. Bearings 32 are respectively sleeved on the shaft ends 11 at both ends of the unwinding roller 1. The bearings 32 are embedded in the second connecting section of the corresponding inner cavity of the support base 3. The shaft ends 11 of the unwinding roller 1 are rotatably connected to the support base 3 through the bearings 32. By setting bearings, the assembly between the shaft ends and the support base is more stable and reliable. In this embodiment, the bearings are arranged axially adjacent to the sleeve 2. The shaft ends 11 can be rotatably connected to the support base through the bearings, and also rotatably connected to the fiber wear-resistant layer 21 through friction damping.

[0034] Example 4 Based on any of the above embodiments, the damping unwinding assembly of this embodiment further includes multiple adjusting shims, each with a different thickness. These adjusting shims can be inserted into the adjusting interval 22 for adjustment and positioning. By setting the adjusting shims, the tightness of the set screw can be adjusted accordingly.

[0035] Preferably, the adjusting shim is a metal sheet.

[0036] Example 5 This embodiment provides a damped unwinding method for a thermal transfer printer, which is implemented using the damped unwinding device of the thermal transfer printer described in one embodiment above, and includes the following steps: S1, fix the fiber wear-resistant layer 21 to the inner wall of the shaft head snap-fit ​​channel of the sleeve 2; S2, the shaft ends 11 at both ends of the unwinding roller 1 are respectively fitted into the shaft end snap-fit ​​channels of the two sets of damping unwinding assemblies; ensuring that there is no gap between the shaft end 11 and the sleeve 2; S3, by tightening or loosening the set screw 4, the friction between the inner wall of the shaft head of the sleeve 2 and the shaft head 11 of the unwinding roller 1 is adjusted to match the tension requirements of the photo paper material; during the printing process, the shaft heads 11 at both ends of the unwinding roller 1 rotate relative to the sleeve 2, and the friction between the sleeve 2 and the shaft head 11 of the unwinding roller 1 provides unwinding damping.

[0037] Based on the tension requirements of the photographic paper (normal tension range 10~30N), use a torque wrench to tighten or loosen the set screw: When tightening the set screw, the pressure of the sleeve on the unwinding roller shaft increases linearly, the friction increases synchronously, and the overall unwinding damping force increases accordingly; when loosening the set screw, the torque decreases, the pressure decreases, and the damping force decreases accordingly; during the printing process, when the unwinding roller is driven to rotate by the traction mechanism, the constant friction between the sleeve and the unwinding roller shaft provides a continuous and stable damping force, and the rigid constraint of mechanical friction avoids tension fluctuations and flickering during the unwinding process; when changing photographic paper, simply loosen or loosen the set screw (torque ≤3N・m) to quickly remove the sleeve or directly disassemble the unwinding roller, and readjust the screw torque to the set value after replacement; periodically (every 1000 working hours) check the wear condition of the fiber abrasion layer. If the wear exceeds 0.2mm, the damping force can be compensated by fine-tuning the screw torque, or the fiber abrasion layer can be directly replaced (replacement time ≤10 minutes).

[0038] The damping unwinding method of this embodiment can stabilize the unwinding tension through mechanical friction damping, eliminate the impact of flicker on multicolor printing, ensure that the registration deviation is ≤0.03mm, and at the same time retain the advantage of quick replacement of photographic paper materials (replacement time ≤3 minutes), reducing equipment costs and maintenance difficulty.

[0039] Example 6 This embodiment provides a thermal transfer printer, including a thermal transfer printer body and a damping unwinding device as described above. The damping unwinding device is mounted on the thermal transfer printer body, which is a digital thermal transfer printer. The main structure of the thermal transfer printer body in this embodiment can be achieved using existing commonly used thermal transfer printers.

[0040] The thermal transfer printer in this embodiment can achieve stable unwinding tension through mechanical friction damping, eliminate the impact of flicker on multi-color printing, ensure that the registration deviation is ≤0.03mm, and at the same time retain the advantage of quick paper replacement (replacement time ≤3 minutes), reducing equipment costs and maintenance difficulty.

[0041] In the description of this utility model, it should be understood that the terms "inner", "outer", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Furthermore, 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. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A damping unwinding device for a thermal transfer printer, characterized in that, It includes an unwinding roller and two sets of damped unwinding assemblies. The two sets of damped unwinding assemblies are arranged opposite to each other, and the two ends of the unwinding roller are respectively dampedly connected to the damped unwinding assemblies. The damping unwinding assembly includes a sleeve, a support base, and a set screw. The support base has a U-shaped structure, and the sleeve is embedded in the inner cavity of the support base. A shaft head engaging channel is formed inside the sleeve, and a fiber abrasion-resistant layer is provided on the inner side wall of the shaft head engaging channel. The shaft heads at both ends of the unwinding roller are respectively inserted into the corresponding shaft head engaging channels and abut against the fiber abrasion-resistant layer. An adjustment interval is provided on the sleeve, which communicates with the shaft head engaging channel. The adjustment interval is continuous from front to back, and the upper end of the adjustment interval is connected to the upper end of the U-shaped support base. A set screw is threaded onto the sleeve, and the set screw passes through the adjustment interval and is threaded to the sleeve on the left and right sides of the adjustment interval, respectively.

2. The damping unwinding device for a thermal transfer printer according to claim 1, characterized in that, The sleeve includes an integrally connected snap-fit ​​section and a locking section. The outer wall of the snap-fit ​​section has an arc-shaped structure that adapts to the bottom of the inner cavity of the support base. The shaft head snap-fit ​​channel is opened on the snap-fit ​​section. There are two locking sections arranged in parallel opposite directions, and the adjustment interval is formed between the two locking sections. The set screws are threaded onto the two locking sections respectively.

3. The damping unwinding device for a thermal transfer printer according to claim 2, characterized in that, In one of the two locking sections, a first threaded hole and an adjusting groove are provided, and a second threaded hole is provided in the other locking section. The first threaded hole and the second threaded hole are arranged coaxially opposite each other and are both connected to the adjusting interval. The adjusting groove is located at the end of the first threaded hole away from the adjusting interval. An operating channel is provided on the support base. The adjusting groove is arranged coaxially with the first threaded hole and the operating channel and is connected to them.

4. The damping unwinding device for a thermal transfer printer according to claim 3, characterized in that, The inner diameter of the adjusting groove is larger than the inner diameter of the first threaded hole, and the screw head of the set screw is housed in the adjusting groove.

5. The damping unwinding device for a thermal transfer printer according to claim 3, characterized in that, The inner diameter of the operating channel is larger than the inner diameter of the first threaded hole.

6. The damping unwinding device for a thermal transfer printer according to claim 1, characterized in that, The inner cavity of the support base includes a first connecting section and a second connecting section along the axial direction of the unwinding roller. The sleeve is embedded in the first connecting section. Bearings are respectively sleeved on the shaft ends at both ends of the unwinding roller. The bearings are embedded in the second connecting section of the corresponding inner cavity of the support base. The shaft ends of the unwinding roller are rotatably connected to the support base through the bearings.

7. The damping unwinding device for a thermal transfer printer according to claim 1, characterized in that, The thickness of the fiber abrasion-resistant layer is 2~5mm.

8. The damping unwinding device for a thermal transfer printer according to claim 1, characterized in that, The damping unwinding assembly also includes multiple adjusting shims, each with a different thickness, which can be inserted into the adjusting interval for adjustment and positioning.

9. The damping unwinding device for a thermal transfer printer according to claim 8, characterized in that, The adjusting shim is a metal sheet.

10. A thermal transfer printer, characterized in that, The invention includes a thermal transfer printer body and a damping unwinding device for a thermal transfer printer as described in any one of claims 1 to 9, wherein the damping unwinding device is mounted on the thermal transfer printer body, and the thermal transfer printer body is a digital thermal transfer printer.

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