Carbon tape bidirectional tension control system

Abstract

This invention relates to the field of thermal transfer printer technology, specifically a bidirectional tension control system for thermal ribbons. The system includes a ribbon support, a take-up roll, and an unwind roll. Both ends of the take-up and unwind rolls are mounted on the ribbon support via a roll-mounting mechanism. The roll-mounting mechanism at one end of the take-up roll is connected to a damping mechanism, which prevents the take-up roll from rotating during tape unwinding. The damping mechanism includes a sliding clutch and a one-way wheel, both rotatably mounted on the ribbon support. The sliding clutch is simultaneously connected to both the one-way wheel and the corresponding roll-mounting mechanism. This invention prevents the ribbon from becoming loose and wrinkled during unwinding, thus avoiding issues with print quality.

Description

Technical Field

[0001] This invention relates to the field of thermal transfer printer technology, and in particular to a bidirectional tension control system for carbon ribbons. Background Technology

[0002] Thermal transfer printers transfer a coating onto the printing medium by heating a ribbon. The printer mainly consists of the printer body and the ribbon system. The ribbon system comprises a ribbon holder, a feed end, and a take-up end. The take-up end is the winding end, and the feed end is the unwinding end. The ribbon holder supports the feed and take-up ends, which are parallel and spaced apart. Both ends can rotate around their respective axes to feed or unwind the ribbon. Currently, most existing ribbon systems are powered at the winding end for active ribbon winding. However, during unwinding, the winding end loses power and is prone to free rotation, causing the ribbon to become fluffy and wrinkled, affecting print quality. Summary of the Invention

[0003] The purpose of this invention is to provide a bidirectional tension control system for carbon ribbons to prevent the ribbon from becoming loose and wrinkled during tape withdrawal, which would affect print quality.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The carbon ribbon tension control system includes a carbon ribbon support, a take-up roll and a release roll. Both ends of the take-up roll and the release roll are mounted on the carbon ribbon support through a drum mounting mechanism. The drum mounting mechanism located at one end of the take-up roll is connected to a damping mechanism.

[0006] The damping mechanism includes a sliding clutch and a one-way wheel. Both the sliding clutch and the one-way wheel are rotatably mounted on the carbon belt support. The sliding clutch is simultaneously connected to the one-way wheel and the corresponding drum mounting mechanism.

[0007] Preferably, the two roll mounting mechanisms at both ends of the tape unwinding roll are respectively connected to two other damping mechanisms for transmission.

[0008] Preferably, the sliding clutch includes a central shaft, a first transmission wheel, a clutch wheel, and a friction assembly. The central shaft is rotatably connected to the carbon belt support. The first transmission wheel is fixed to the inner end of the central shaft and is connected to the corresponding drum mounting mechanism. The clutch wheel is mounted on the central shaft and is connected to the one-way rotating wheel. The friction assembly is circumferentially rotatable and limited on the central shaft and is in contact with and pressed against the clutch wheel.

[0009] Preferably, a baffle is fitted at the end of the central shaft away from the transmission wheel, and a spring is installed between the baffle and the friction assembly.

[0010] Preferably, the central shaft is rotatably connected to a screw, and the screw is threadedly connected to the baffle.

[0011] Preferably, the friction assembly includes a first friction sleeve that slides on a central shaft, the first friction sleeve being circumferentially rotatable relative to the central shaft, a second friction sleeve nested in the first friction sleeve near the clutch wheel, and a second spring between the second friction sleeve and the first friction sleeve being circumferentially rotatable relative to the first friction sleeve.

[0012] Preferably, the carbon belt tension control system further includes a power mechanism, which includes a power motor, a reduction gear set, a power wheel sleeve, a power one-way wheel, and a steering wheel. The power motor and the reduction gear set are both mounted on the carbon belt support. The reduction gear set meshes with the output wheel of the power motor. There are two power wheel sleeves and two power one-way wheels. The two power wheel sleeves are rotatably connected to the carbon belt support. The two power one-way wheels are unidirectionally and coaxially rotatably connected to the two power wheel sleeves and respectively drive the take-up and unwinding of the carbon belt. One power wheel sleeve meshes with the reduction gear set, and the other power wheel sleeve meshes with the reduction gear set through the steering wheel.

[0013] Preferably, the carbon ribbon support includes side frames, a middle frame, and open mounting plates. The two side frames are fixedly installed at both ends of the middle frame, and four open mounting plates are installed on the middle frame for mounting four roll mounting mechanisms.

[0014] Preferably, the drum mounting mechanism includes an end shaft, a slot, a multi-faceted sleeve, a retaining ring, and a tightening screw. The slot is coaxially disposed at one end of the end shaft for engaging with the open mounting plate. The multi-faceted sleeve slides on the end shaft. The retaining ring is disposed near the slot end of the multi-faceted sleeve. The tightening screw is threaded onto the multi-faceted sleeve to tighten the end shaft.

[0015] Preferably, the multi-faceted sleeve is provided with multiple limiting grooves in the radial direction, each limiting groove has an anti-slip ridge that slides radially in the groove, and each anti-slip ridge and the limiting groove are provided with multiple elastic pieces.

[0016] The present invention has the following beneficial effects:

[0017] When the take-up roll rotates to rewind, the sliding clutch rotates in the forward direction, driving the one-way wheel to rotate normally. During this process, the damping mechanism operates normally without generating damping. When the take-up roll unwinds, the sliding clutch rotates in the reverse direction. At this time, the one-way wheel cannot rotate, causing one part of the sliding clutch to rotate while the other part remains stationary. This creates friction between the two parts, which dampens the unwinding rotation of the take-up roll. Thus, during unwinding, the take-up roll is continuously affected by the frictional resistance generated by the sliding clutch, keeping the ribbon taut at all times, preventing looseness and wrinkles, and ensuring print quality. Attached Figure Description

[0018] Figure 1 and Figure 2 This is a schematic diagram of the carbon ribbon bidirectional tension control system;

[0019] Figure 3 This is a partial structural diagram of the carbon ribbon support;

[0020] Figure 4 This is a structural schematic diagram of the drum mounting mechanism;

[0021] Figure 5 This is a schematic diagram of the multi-faceted sleeve structure;

[0022] Figure 6 A schematic diagram of the anti-slip rib structure;

[0023] Figure 7 A cross-sectional view of the sliding clutch;

[0024] Figure 8 of Figure 7 A partially enlarged structural diagram;

[0025] Figure 9 This is a schematic diagram of the central axis structure;

[0026] Figure 10 This is a schematic diagram of the clutch wheel structure;

[0027] Figure 11 This is a partial structural diagram of a slipper clutch;

[0028] Figure 12 This is a schematic diagram of the friction sleeve 1;

[0029] Figure 13 This is a schematic diagram of the structure of friction sleeve two;

[0030] Figure 14 This is a schematic diagram of the power mechanism.

[0031] In the picture:

[0032] 1. Carbon belt support; 11. Side frame; 12. Intermediate frame; 13. Open mounting plate; 2. Take-up roll; 3. Unwind roll; 4. Roller mounting mechanism; 41. End shaft; 42. Slot; 43. Multi-faceted sleeve; 431. Limiting groove; 432. Anti-slip rib; 433. Elastic sheet; 44. Retaining ring; 45. Tightening screw; 5. Damping mechanism; 51. Sliding clutch; 511. Central shaft; 512. Drive wheel 1; 513. Clutch wheel; 514. Friction assembly; 5141. Friction sleeve 1; 5142. Spring 2; 5143. Spring 1; 515. Baffle; 516. Screw; 517. One-way rotating wheel; 52. Power mechanism; 6. Power motor; 61. Reduction transmission wheel set; 62. Power wheel sleeve; 63. Power one-way wheel; 64. Steering wheel; 65. Detailed Implementation

[0033] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0034] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0035] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0036] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Combination Figure 1-2 The carbon ribbon tension control system includes a carbon ribbon support 1, a take-up roll 2, and an unwind roll 3. Both ends of the take-up roll 2 and the unwind roll 3 are mounted on the carbon ribbon support 1 through a drum mounting mechanism 4. The drum mounting mechanism 4 located at one end of the take-up roll 2 is connected to a damping mechanism 5. When unwinding the tape, the damping mechanism 5 can dampen the rotation of the take-up roll 2. The damping mechanism 5 includes a sliding clutch 51 and a one-way wheel 52. Both the sliding clutch 51 and the one-way wheel 52 are rotatably mounted on the carbon ribbon support 1. The sliding clutch 51 is simultaneously connected to the one-way wheel 52 and the corresponding drum mounting mechanism 4.

[0038] Specifically, the carbon ribbon bracket 1 is equipped with a fixed shaft for mounting the unidirectional roller 52. After the unidirectional roller 52 is mounted on the fixed shaft, it can only rotate in one direction. Figure 1Taking the example shown, the rotation direction is explained as follows: When the take-up roll 2 rotates counterclockwise to rewind, the sliding clutch 51 rotates clockwise as a whole, and the one-way roller 52 rotates normally counterclockwise on the fixed shaft. During this process, the damping mechanism 5 operates normally without generating damping. When the take-up roll 2 unwinds, that is, when the take-up roll 2 is pulled by the carbon ribbon and rotates clockwise, the take-up roll 2 drives the sliding clutch 51 to rotate counterclockwise through the roll mounting mechanism 4. Since the one-way roller 52 cannot rotate clockwise, a part of the sliding clutch 51 will rotate counterclockwise, while the other part in contact with the one-way roller 52 will remain stationary due to the influence of the one-way roller 52. Friction will be generated between the two parts, and this friction will form the damping of the clockwise rotation of the take-up roll 2, which in turn forms the damping when the take-up roll 2 unwinds. Thus, when unwinding, the take-up roll 2 is continuously affected by the frictional resistance generated by the sliding clutch 51, keeping the carbon ribbon in a taut state, avoiding looseness and wrinkles, and ensuring printing quality.

[0039] It should be noted that some small portable printers have a damping structure on the tape take-up 2 transmission system. However, for such printers, the damping structures for both tape take-up and untake-up are integrated into the ribbon consumable box. The damping structure is discarded when the consumable is replaced, which increases the cost of consumables. In contrast, this application integrates the damping mechanism 5 into the ribbon holder 1, that is, on the printer body rather than in the consumable box. Users do not need to replace the damping mechanism 5 when replacing the ribbon, which significantly reduces the cost of consumables.

[0040] Combination Figure 1-2 In some embodiments, the two roll mounting mechanisms 4 at both ends of the unwinding roll 3 are respectively connected to two other damping mechanisms 5.

[0041] Currently, existing carbon ribbon systems only have a damping mechanism at one end of the unwinding roll 3. Especially for wide carbon ribbons, there is tension only on one side of the unwinding roll 3, which can easily lead to uneven tension on both sides of the carbon ribbon between the unwinding roll 3 and the take-up roll 2, increasing the risk of wrinkles.

[0042] Therefore, by setting two additional damping mechanisms 5 on the carbon ribbon support 1, synchronous and symmetrical damping is applied to both sides of the unwinding roll 3, ensuring that the tension on both sides of the wide carbon ribbon is balanced during operation, thus fundamentally eliminating carbon ribbon wrinkles caused by unilateral tension.

[0043] Specifically, the one-way rollers 52 of the two damping mechanisms 5 on both sides of the unwinding roll 3 are arranged in the same direction to ensure that the two one-way rollers 52 remain stationary when the unwinding roll 3 rotates clockwise during normal unwinding, so that the two sliding clutches 51 generate damping.

[0044] Combination Figure 7 , Figure 9 , Figure 10In some embodiments, the sliding clutch 51 includes a central shaft 511, a drive wheel 512, a clutch wheel 513, and a friction assembly 514. The central shaft 511 is rotatably connected to the carbon belt support 1. The drive wheel 512 is fixed to the inner end of the central shaft 511 and is connected to the corresponding drum mounting mechanism 4. The clutch wheel 513 is sleeved on the central shaft 511 and is connected to the one-way rotating wheel 52. The friction assembly 514 is circumferentially rotatably limited and mounted on the central shaft 511 and contacts and presses against the clutch wheel 513.

[0045] Specifically, the central shaft 511 rotates through the side frame 11 of the carbon belt support 1. The transmission wheel 512 is fixed to the inner end of the central shaft 511. A step is provided in the middle of the central shaft 511. The clutch wheel 513 rotates on the central shaft 511 and presses against the step of the central shaft 511 in the direction of the transmission wheel 512. The friction assembly 514 is installed on the outer end of the central shaft 511 and contacts and presses against the outer side of the clutch wheel 513. There is friction between the two. Therefore, when the clutch wheel 513 is not subjected to external force or the external force is less than the friction force, the rotating central shaft 511 can drive the clutch wheel 513 to rotate through the friction force between the friction assembly 514 and the clutch wheel 513. When the external force on the clutch wheel 513 is greater than the friction force, the rotating central shaft 511 will not be able to drive the clutch wheel 513 to rotate through the friction force between the friction assembly 514 and the clutch wheel 513.

[0046] Thus, during tape unwinding, the take-up roll 2 rotates clockwise, and the transmission wheel 512 drives the central shaft 511 to rotate counterclockwise. However, since the clutch wheel 513 is engaged with the one-way wheel 52, it cannot rotate counterclockwise, causing the friction component 514 to slide relative to the clutch wheel 513. This causes the take-up roll 2 to be subjected to friction between the friction component 514 and the clutch wheel 513, forming damping for the clockwise rotation of the take-up roll 2, ensuring that the carbon belt is always taut and avoiding looseness and wrinkles. Meanwhile, the unwind roll 3 rotates counterclockwise, and at this time, the one-way wheels 52 at both ends of the unwind roll 3 rotate counterclockwise.

[0047] When the belt is fed in, the take-up roll 2 should rotate counterclockwise. At this time, the drive clutch wheel 513 rotates clockwise, and the one-way wheel 52 can rotate normally counterclockwise. This allows the clutch wheel 513 to be unaffected by the one-way wheel 52, and then drive the friction assembly 514 to rotate through the friction force with the friction assembly 514. This causes the central shaft 511 and the drive wheel 512 to rotate clockwise, which in turn drives the take-up roll 2 to rotate counterclockwise. At this time, the unwind roll 3 should rotate clockwise. Due to the inability of the two one-way wheels 52 to rotate clockwise, the two sliding clutches 51 generate friction force, forming damping, ensuring that the carbon belt has balanced tension on both sides during operation, and eliminating carbon belt wrinkles caused by uneven tension.

[0048] Combination Figure 7 , Figure 11In some embodiments, a baffle 516 is fitted onto the end of the central shaft 511 away from the drive wheel 512, and a spring 515 is installed between the baffle 516 and the friction assembly 514.

[0049] Specifically, in order to ensure that the friction assembly 514 and the clutch wheel 513 always maintain a certain friction force and to prevent the friction force between them from decreasing or disappearing due to frictional wear, a spring 515 is provided. Through the elastic force of the spring 515, the friction assembly 514 is pushed closer to the clutch wheel 513, thereby ensuring the friction force between them.

[0050] Combination Figure 11 In some embodiments, a screw 517 is rotatably connected to the center of the central shaft 511, and the screw 517 is threadedly connected to the baffle 516.

[0051] Specifically, the central shaft 511 has a central hole for the rotatable mounting of the screw 517; the end of the central shaft 511 away from the drive wheel 512 has an axial recessed groove, and the baffle 516, while being fitted onto the central shaft 511, also has a portion located in the recessed groove. This portion is threadedly connected to the threaded portion of the screw 517, thereby allowing the baffle 516 to move axially on the central shaft 511 by rotating the screw 517, thus initially compressing the spring 515 between the baffle 516 and the friction assembly 514. The spacing is adjusted to control the friction force between the friction assembly 514 and the clutch wheel 513. The smaller the initial compression spacing of the spring 515, the greater the pressure and friction between the friction assembly 514 and the clutch wheel 513. Conversely, the larger the initial compression spacing of the spring 515, the smaller the pressure and friction between the friction assembly 514 and the clutch wheel 513. This allows for adjustment of the internal friction force, i.e., the damping magnitude, of the sliding clutch 51 to adapt to different practical applications.

[0052] The screw 517 is divided into two parts. One part has threads on its outer surface and is located in a recessed groove. The other part has a smooth surface and is located inside the central shaft 511. The end of this part is provided with an end baffle. The end of the threaded part is provided with a rotating head that cooperates with a wrench.

[0053] Combination Figure 8 , Figure 11-13 In some embodiments, the friction assembly 514 includes a first friction sleeve 5141 that slides on the central shaft 511. The first friction sleeve 5141 is circumferentially rotatable relative to the central shaft 511. A second friction sleeve 5142 is nested in the first friction sleeve 5141 near the clutch wheel 513. A second spring 5143 is provided between the second friction sleeve 5142 and the first friction sleeve 5141. The second friction sleeve 5142 is circumferentially rotatable relative to the first friction sleeve 5141.

[0054] Specifically, the inner ring of friction sleeve 1 5141 has a protruding ridge that slides in the recessed groove of the central shaft 511. The outer ring of friction sleeve 1 5141 protrudes towards the clutch wheel 513 with a friction ring 1. The outer ring of friction sleeve 2 5142 protrudes towards the clutch wheel 513 with a friction ring 2. The friction ring 2 slides coaxially within the friction ring 1. The friction sleeve 2 5142 has two protruding pillars vertically on the side away from the clutch wheel 513. The two protruding pillars slide through the middle of friction sleeve 1 5141, so that the two form a rotation limit. Through the setting of spring 2 5143, the friction sleeve 2 5142 is pushed to slide towards the clutch wheel 513, so that the friction ring 2 protrudes from the friction ring 1. Thus, initially, the friction assembly 514 only contacts the clutch wheel 513 through the friction ring 2.

[0055] When adjusting the damping of the slip clutch 51, as the first spring 515 presses the first friction sleeve 5141 towards the clutch wheel 513, the first friction sleeve 5141 will compress the second spring 5143, thereby causing the first friction ring on the first friction sleeve 5141 to also contact the clutch wheel 513. This increases the contact area between the friction assembly 514 and the clutch wheel 513, further increasing the range of friction adjustment, and consequently increasing the range of damping adjustment.

[0056] Combination Figure 14 In some embodiments, the carbon belt tension control system further includes a power mechanism 6. The power mechanism 6 includes a power motor 61, a reduction gear set 62, a power wheel sleeve 63, a power one-way wheel 64, and a steering wheel 65. The power motor 61 and the reduction gear set 62 are both mounted on the carbon belt support 1. The reduction gear set 62 meshes with the output wheel of the power motor 61. There are two power wheel sleeves 63 and two power one-way wheels 64. The two power wheel sleeves 63 are rotatably connected to the carbon belt support 1. The two power one-way wheels 64 are unidirectionally and coaxially rotatably connected to the two power wheel sleeves 63 and respectively drive the take-up roll 2 and the unwind roll 3. One power wheel sleeve 63 is meshed with the reduction gear set 62, and the other power wheel sleeve 63 is meshed with the reduction gear set 62 through the steering wheel 65.

[0057] Currently, most existing ribbon systems only have power at the take-up end, while the unwinding roll 3 has no active power. This results in the unwinding stroke being limited by the idle stroke of the torsion spring, making it impossible to achieve long-distance unwinding. Based on this, this application sets up a power motor 61, a reduction transmission wheel set 62, a power wheel sleeve 63, a power one-way wheel 64, and a steering wheel 65. By rotating the power motor 61 in both directions, the power switching between the take-up roll 2 and the unwinding roll 3 can be achieved. Without additional control, active power can be configured for the unwinding roll 3, enabling the printer to have the ability to unwind any length of tape, making it convenient for users to adjust the printing start position or deal with paper jams.

[0058] Specifically, the drive unidirectional wheel 64 is coaxially mounted on the drive wheel sleeve 63, and the two can only rotate in one direction relative to each other. (The following text continues with...) Figure 1 The direction shown illustrates the transmission process;

[0059] The power motor 61 rotates forward and drives the reduction gear set 62 through the output wheel on its output shaft. After speed reduction, the last transmission wheel of the reduction gear set 62 rotates counterclockwise, thereby driving the steering wheel 65 to rotate clockwise. The steering wheel 65 then drives the corresponding power wheel sleeve 63 to rotate counterclockwise. The counterclockwise rotation of the power wheel sleeve 63 will drive the power one-way wheel 64 on it to rotate counterclockwise, which in turn drives the corresponding clutch wheel 513 to rotate clockwise. Its corresponding one-way wheel 52 rotates normally counterclockwise, and then drives the drum mounting mechanism 4 corresponding to the take-up roll 2 to rotate counterclockwise through the central shaft 511 and the transmission wheel 512. The take-up reel 2 rotates counterclockwise to take up the tape; at the other end, when the last drive wheel of the reduction gearbox 62 rotates counterclockwise, it will simultaneously drive another drive wheel sleeve 63 to rotate clockwise. The clockwise rotating drive wheel sleeve 63 will not drive the drive one-way wheel 64 on it to rotate clockwise, thus stopping the transmission; while affected by the movement of the carbon belt, although the clockwise rotation of the unwinding reel 3 will drive the corresponding central shaft 511 to rotate counterclockwise through the drum mounting mechanism 4, the clutch wheel 513 will not rotate due to the influence of its corresponding one-way wheel 52, thus making the clutch wheel 513 also correspond to the one-way wheel 64 on the drive wheel sleeve 63 remaining stationary.

[0060] The power motor 61 reverses direction and drives the reduction gear set 62 through the output wheel on its output shaft. After speed reduction, the last transmission wheel of the reduction gear set 62 rotates clockwise, thereby driving the steering wheel 65 to rotate counterclockwise. The steering wheel 65 then drives the corresponding power wheel sleeve 63 to rotate clockwise. The clockwise rotation of the power wheel sleeve 63 will not drive the power one-way wheel 64 on it to rotate clockwise, thus stopping the transmission. On the other end, when the last transmission wheel of the reduction gear set 62 rotates clockwise, it simultaneously drives another power wheel sleeve 63 to rotate counterclockwise. The counterclockwise rotation of the power wheel sleeve 63 will drive the power one-way wheel 64 on it to rotate counterclockwise. The clockwise rotation causes the corresponding clutch wheel 513 to rotate clockwise, while its corresponding one-way wheel 52 rotates normally counterclockwise. This, in turn, drives the unwinding roll 3 to rotate counterclockwise via the central shaft 511 and the drive wheel 512, causing the unwinding roll 3 to rotate counterclockwise for unwinding. Meanwhile, due to the movement of the carbon belt, the take-up roll 2, which rotates clockwise, will rotate counterclockwise via the drive wheel 4, but the clutch wheel 513 will not rotate due to the influence of its corresponding one-way wheel 52. Thus, the clutch wheel 513 also corresponds to the one-way drive 64, which remains stationary on the drive wheel sleeve 63.

[0061] In summary, by rotating the power motor 61 in both directions, the power switching between the tape feed 2 and the tape unwind 3 can be achieved without additional control, while also enabling the printer to unwind the tape over long distances. On the other hand, by rotating the power motor 61 in both directions, in conjunction with the damping mechanism 5 to control the tension of the ribbon, sudden tension changes during the switching between the feed and unwind states are avoided, which could cause the ribbon to loosen or break.

[0062] Combination Figure 2-3 In some embodiments, the carbon ribbon support 1 includes a side frame 11, a middle frame 12 and an open mounting plate 13. The two side frames 11 are respectively fixedly installed at both ends of the middle frame 12. The middle frame 12 is equipped with four open mounting plates 13 for mounting four roll mounting mechanisms 4.

[0063] Specifically, the side frame 11 is used to install the damping mechanism 5 and the transmission mechanism 6, and the intermediate frame 12 is installed between the two side frames 11 to install four open mounting plates 13, and the four open mounting plates 13 form the mounting of the four roll mounting mechanisms 4, thereby realizing the installation of the unwinding roll 3 and the take-up roll 2.

[0064] The open mounting plate 13 has an opening at one end, and the two edges of the opening can be elastically deformed, thereby squeezing the roll mounting mechanism 4 into the opening of the open mounting plate 13 from the opening direction, thus forming a quick installation of the roll mounting mechanism 4 at the open mounting plate 13.

[0065] Combination Figure 4 In some embodiments, the reel mounting mechanism 4 includes an end shaft 41, a slot 42, a multi-faceted sleeve 43, a retaining ring 44, and a tightening screw 45. The slot 42 is coaxially disposed at one end of the end shaft 41 for engaging with the open mounting plate 13. The multi-faceted sleeve 43 slides on the end shaft 41. The retaining ring 44 is disposed at the end of the multi-faceted sleeve 43 near the slot 42. The tightening screw 45 is threadedly connected to the multi-faceted sleeve 43 to tighten the end shaft 41.

[0066] Specifically, the slot 42 is an annular groove. When the drum mounting mechanism 4 is installed at the open mounting plate 13, the slot 42 is aligned with the opening of the open mounting plate 13 and pressed down, so that the slot 42 can slide into the open mounting plate 13, forming a limiting installation between the two. At the same time, through the correspondence between the thickness of the open mounting plate 13 and the width of the slot 42, after the slot 42 is installed in the open mounting plate 13, the end shaft 41 is coaxially set with the inside of the opening of the open mounting plate 13, which facilitates the coaxial installation of the two drum mounting mechanisms 4 installed at the two opposite open mounting plates 13.

[0067] When installing the unwinding roll 3 or the winding roll 2, the end of the roll is fitted onto the end shaft 41, and the multi-faceted sleeve 43 is inserted into the roll. The edges of the multi-faceted sleeve 43 press against the inner wall of the roll, increasing the friction force for circumferential rotation and preventing circumferential rotation. At the same time, the retaining ring 44 presses against the end of the roll to achieve axial limitation, thereby achieving the relative fixed installation of the roll mounting mechanism 4 and the roll.

[0068] Among them, a keyway and a key are provided between the polygonal sleeve 43 and the end shaft 41. Through the cooperation of the two, the polygonal sleeve 43 can only move axially on the end shaft 41 and will not rotate relative to it. By rotating the tightening screw 45, the inner end of the tightening screw 45 is pressed against the end shaft 41, thereby realizing the axial limiting and fixing of the polygonal sleeve 43 and the end shaft 41. Thus, by adjusting the position of the polygonal sleeve 43 on the end shaft 41, the two coaxial roll mounting mechanisms 4 can adapt to the installation and fixing of carbon ribbon rolls of different widths.

[0069] Combination Figure 5-6 In some embodiments, the multi-faceted sleeve 43 is provided with a plurality of limiting grooves 431 in the radial direction, and each limiting groove 431 is provided with an anti-slip rib 432 in the radial direction, and each anti-slip rib 432 and the limiting groove 431 are provided with a plurality of elastic pieces 433.

[0070] Specifically, the elastic force of the elastic sheet 433 can push the anti-slip rib 432 to move away from the axis of the end shaft 41 in the limiting groove 431, thereby increasing the space occupied by the anti-slip rib 432. Thus, when the drum is sleeved on the multi-faceted sleeve 43, the anti-slip rib 432 can be more tightly pressed against the inner wall of the drum by the elastic force of the elastic sheet 433, further increasing the friction between the multi-faceted sleeve 43 and the drum in circumferential rotation, ensuring the transmission of the drum installation mechanism 4 to the unwinding roll 3 or the winding roll 2.

[0071] The inner end of the anti-slip rib 432 is chamfered, which makes it easy to press the anti-slip rib 432 back into the limiting groove 431 when the drum is quickly put onto the multi-faceted sleeve 43.

[0072] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A carbon tape tension control system characterized by, It includes a carbon ribbon support (1), a take-up roll (2) and a release roll (3). Both ends of the take-up roll (2) and the release roll (3) are mounted on the carbon ribbon support (1) through a roll mounting mechanism (4). The roll mounting mechanism (4) located at one end of the take-up roll (2) is connected to a damping mechanism (5). The damping mechanism (5) includes a sliding clutch (51) and a one-way wheel (52). The sliding clutch (51) and the one-way wheel (52) are both rotatably mounted on the carbon belt support (1). The sliding clutch (51) is simultaneously connected to the one-way wheel (52) and the corresponding drum mounting mechanism (4).

2. The carbon belt tension control system according to claim 1, characterized in that, The two roll mounting mechanisms (4) at both ends of the tape roll (3) are respectively connected to the other two damping mechanisms (5) for transmission.

3. The carbon belt tension control system according to claim 1 or 2, characterized in that, The sliding clutch (51) includes a central shaft (511), a transmission wheel (512), a clutch wheel (513), and a friction assembly (514). The central shaft (511) is rotatably connected to the carbon belt support (1). The transmission wheel (512) is fixed to the inner end of the central shaft (511) and is connected to the corresponding drum mounting mechanism (4). The clutch wheel (513) is sleeved on the central shaft (511) and is connected to the one-way rotating wheel (52). The friction assembly (514) is circumferentially rotated and limited on the central shaft (511) and is in contact with and pressed against the clutch wheel (513).

4. The carbon belt tension control system according to claim 3, characterized in that, A baffle plate (516) is fitted on the end of the central shaft (511) away from the transmission wheel (512), and a spring (515) is installed between the baffle plate (516) and the friction assembly (514).

5. The carbon belt tension control system according to claim 4, characterized in that, The central shaft (511) is rotatably connected to a screw (517), and the screw (517) is threadedly connected to the baffle (516).

6. The carbon belt tension control system according to claim 5, characterized in that, The friction assembly (514) includes a friction sleeve one (5141) that slides on a central shaft (511). The friction sleeve one (5141) is circumferentially rotatable relative to the central shaft (511). A friction sleeve two (5142) is nested in the friction sleeve one (5141) near the clutch wheel (513). A spring two (5143) is provided between the friction sleeve two (5142) and the friction sleeve one (5141). The friction sleeve two (5142) is circumferentially rotatable relative to the friction sleeve one (5141).

7. The carbon belt tension control system according to claim 1 or 2, characterized in that, It also includes a power mechanism (6), which includes a power motor (61), a reduction gear set (62), a power wheel sleeve (63), a power one-way wheel (64), and a steering wheel (65). The power motor (61) and the reduction gear set (62) are both mounted on the carbon belt support (1). The reduction gear set (62) meshes with the output wheel of the power motor (61). There are two power wheel sleeves (63) and two power one-way wheels (64). The two power wheel sleeves (63) are rotatably connected to the carbon belt support (1). The two power one-way wheels (64) are rotatably connected to the two power wheel sleeves (63) in one direction and drive the take-up roll (2) and the unwind roll (3) respectively. One of the power wheel sleeves (63) meshes with the reduction gear set (62), and the other power wheel sleeve (63) meshes with the reduction gear set (62) through the steering wheel (65).

8. The carbon belt tension control system according to claim 1, characterized in that, The carbon ribbon support (1) includes a side frame (11), a middle frame (12) and an open mounting plate (13). The two side frames (11) are fixedly installed at both ends of the middle frame (12). The middle frame (12) is equipped with four open mounting plates (13) for mounting four roll mounting mechanisms (4).

9. The carbon belt tension control system according to claim 8, characterized in that, The drum mounting mechanism (4) includes an end shaft (41), a slot (42), a multi-faceted sleeve (43), a retaining ring (44), and a tightening screw (45). The slot (42) is coaxially disposed at one end of the end shaft (41) and is used to engage with the open mounting plate (13). The multi-faceted sleeve (43) slides on the end shaft (41). The retaining ring (44) is disposed on the end of the multi-faceted sleeve (43) near the slot (42). The tightening screw (45) is threaded onto the multi-faceted sleeve (43) and tightens the end shaft (41).

10. The carbon belt tension control system according to claim 9, characterized in that, The multi-faceted sleeve (43) is provided with multiple limiting grooves (431) in the radial direction. Each limiting groove (431) has a radially sliding anti-slip rib (432). Each anti-slip rib (432) and the limiting groove (431) are provided with multiple elastic pieces (433).

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