Thermal transfer ribbon conveying device

Abstract

The utility model relates to the technical field of A4 thermal transfer printers, and discloses a thermal transfer ribbon conveying device which comprises a rack and a first gasket, one side of the front end of the rack is provided with a friction transmission device, the other side of the front end of the rack is provided with a damping device, and one side of the rear end of the rack is fixedly provided with a motor. According to the thermal transfer ribbon conveying device, the motor and other parts are arranged, when the friction transmission device drives the recovery shaft to work, the friction gear slides all the time, and the tensile stress borne by the thermal transfer ribbon body between the recovery shaft and the rubber roller body is concentrated on the side close to the friction device; the stress applied to the thermal transfer ribbon body is concentrated on the same side and is tensile stress, so that the situation that the thermal transfer ribbon body is wrinkled due to diagonal pulling of the thermal transfer ribbon body is avoided, and the problem that the wrinkles of the thermal transfer ribbon are inclined due to diagonal pulling of the recovery shaft and the supply shaft of the thermal transfer ribbon box is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of A4 thermal transfer printers, in particular to a carbon ribbon conveying device. Background Art

[0002] A4 thermal transfer printers are usually equipped with a driving carbon ribbon device, which is equipped with a driving shaft and a driven shaft. The driving shaft outputs power to the recovery shaft of the carbon ribbon cassette, and the driven shaft provides tension damping to the supply shaft of the carbon ribbon cassette. The printers on the market stagger the driving shaft and the driven shaft at both ends of the carbon ribbon cassette.

[0003] According to the design of the existing carbon ribbon conveying device, the printers on the market stagger the driving shaft and the driven shaft at both ends of the carbon ribbon box, that is, the driving torque and the damping torque of the carbon ribbon box are set diagonally, so that the recovery shaft and the supply shaft of the carbon ribbon box are pulled diagonally, causing the carbon ribbon to wrinkle and go slanted, affecting the printing effect.

[0004] Now, a new type of carbon ribbon conveying device is proposed to solve the above-mentioned problem. Utility Model Content

[0005] The utility model aims to provide a carbon ribbon conveying device to solve the problem that the recovery shaft and the supply shaft of the carbon ribbon box are pulled diagonally, resulting in the carbon ribbon wrinkles and slanting.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a carbon ribbon transmission device comprises a frame and a first gasket, a friction transmission device is arranged on one side of the front end of the frame, a damping device is arranged on the other side of the front end of the frame, a motor is fixedly installed on one side of the rear end of the frame, a first gear is arranged on the front end of the damping device, a driven shaft is arranged inside the first gear, a driving shaft is arranged inside the friction transmission device, a first coupling is arranged at the rear end of the driving shaft, a print head is arranged at the rear end of the frame, carbon ribbon boxes are arranged on both sides of the rear end of the frame, a rubber roller body is arranged at the top of the carbon ribbon box, a rubber roller shaft is fixedly connected to one side of the rubber roller body, a rubber roller gear is fixed to the outside of the rubber roller shaft, a recovery shaft is arranged on one side of the rear end of the frame, a second coupling is arranged at the rear end of the driven shaft, a supply shaft is arranged on one side of the rear end of the frame, a shunt gear is arranged between the friction transmission device and the damping device, and a carbon ribbon body is arranged outside the recovery shaft and the supply shaft.

[0007] Preferably, the first coupling can be connected to the recovery shaft of the carbon ribbon cassette, the second coupling is connected to the supply shaft of the carbon ribbon cassette, and the supply shaft is connected to the damping device.

[0008] Preferably, a friction gear is provided inside the friction transmission device, a first friction plate is provided at the rear end of the friction gear, a second gasket is provided at the rear end of the first friction plate, a first gasket is provided at the rear end of the friction transmission device, and a first spring is fixedly connected between the first gasket and the second gasket.

[0009] Preferably, the branch gear is provided with two layers of gears, one layer is a large gear and the other layer is a small gear, and the rubber roller gear is meshed with the small gear.

[0010] Preferably, a second gear is arranged on one side of the first gear, and the second gear is divided into two layers, one layer is a large gear, and the other layer is a small gear, the large gear is meshed with the motor main shaft gear, and the small gear is meshed with the first gear.

[0011] Preferably, the damping device is provided with a shell, a driven shaft is provided inside the shell, the shell is provided with a center hole which is concentrically fixed with the circular hole of the frame, a second friction plate is fixedly connected to the front end of the shell, a third gasket is fixedly connected to the rear end of the second friction plate, a fourth gasket is provided at the rear end of the third gasket, a second spring is fixedly connected between the third gasket and the fourth gasket, and a second coupling is sleeved on the rear end of the outside of the driven shaft.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the carbon ribbon conveying device not only avoids the occurrence of wrinkles on the carbon ribbon body caused by diagonal pulling of the carbon ribbon body, and prevents the carbon ribbon body from being pulled apart, thus protecting the carbon ribbon body, but also simplifies the structure, saves space, and has a damping effect;

[0013] (1) By providing a motor and other parts, when the motor rotates, the motor main shaft gear drives the second gear to rotate, the second gear drives the first gear to rotate, the first gear drives the branch gear to rotate, the branch gear drives the rubber roller body gear and the friction gear to rotate, the friction gear drives the driving shaft to rotate, the driving shaft drives the recovery shaft to rotate, the rubber roller body gear rotates to drive the rubber roller body to rotate, thereby dragging the driven shaft to rotate, the friction gear speed is greater than the driving shaft speed, the friction gear is always slipping, the rubber roller body is subjected to damping force when driving the supply shaft to rotate, so that the tensile stress of the carbon ribbon body between the rubber roller body and the supply shaft is concentrated on the side close to the damping device, when the friction transmission device drives the recovery shaft to work, the friction gear is always slipping, and the tensile stress of the carbon ribbon body between the recovery shaft and the rubber roller body is concentrated on the side close to the friction device. From the above analysis, it can be seen that in the process of transmitting the carbon ribbon body, the stress of the carbon ribbon body is concentrated on the same side, and it is the same tensile stress, thereby avoiding the diagonal pulling of the carbon ribbon body to cause the carbon ribbon body to wrinkle;

[0014] (2) By providing parts such as a branch gear, under the action of the branch gear, the rotation speed of the friction gear is greater than the rotation speed of the rubber roller body gear, and because the carbon ribbon body is connected, the linear speed of the recovery shaft is equal to the linear speed of the rubber roller body, so the rotation speed of the friction gear is greater than the rotation speed of the driving shaft, and the friction gear is always slipping relative to the second gasket, thereby ensuring that the linear speed of the recovery shaft is equal to the linear speed of the rubber roller body, and the carbon ribbon body is not broken, thereby protecting the carbon ribbon body;

[0015] (3) By providing parts such as a driven shaft, a central hole is provided in the outer shell and is fixed concentrically with a circular hole on the frame, and the driven shaft is rotatably connected to the concentric holes of the outer shell and the frame, thereby ensuring that the driven shaft has a sufficient limit height, thereby preventing the driven shaft from shaking too much. One end of the driven shaft extends out of the outer shell and is hinged to the first gear, and the driven shaft and the rotating shaft of the second gear are combined into one, thereby simplifying the structure and saving space. A second friction plate and a third gasket are provided on the inner side of the damping device outer shell, and the third gasket is non-rotatably connected to the driven shaft. One end of the second spring abuts against the third gasket, and the other end abuts against the fourth gasket. The other side of the fourth gasket is subject to the force of the second spring limiting the driven shaft. The rotation of the third gasket will generate friction on the second friction plate, thereby making the driven shaft have a damping effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0017] Figure 2 This is a side view structural diagram of the connection between the rubber roller and the print head of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model when viewed from above;

[0019] Figure 4 It is a schematic diagram of the top structure of the utility model.

[0020] In the figure: 1. frame; 2. friction transmission device; 3. driving shaft; 4. branch gear; 5. first gear; 6. driven shaft; 7. second gear; 8. damping device; 9. motor; 10. rubber roller gear; 11. carbon ribbon box; 12. rubber roller body; 13. first coupling; 14. carbon ribbon body; 15. print head; 16. recovery shaft; 17. supply shaft; 18. first gasket; 19. first spring; 20. first friction plate; 21. second gasket; 22. friction gear; 23. housing; 24. second friction plate; 25. third gasket; 26. second spring; 27. fourth gasket; 29. ​​second coupling; 30. rubber roller shaft. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figure 1-4 A carbon ribbon conveying device comprises a frame 1 and a first gasket 18, a friction transmission device 2 is arranged on one side of the front end of the frame 1, a damping device 8 is arranged on the other side of the front end of the frame 1, a motor 9 is fixedly installed on one side of the rear end of the frame 1, a first gear 5 is arranged on the front end of the damping device 8, a driven shaft 6 is arranged inside the first gear 5, a driving shaft 3 is arranged inside the friction transmission device 2, a first coupling 13 is arranged on the rear end of the driving shaft 3, a print head 15 is arranged on the rear end of the frame 1, and two A carbon ribbon box 11 is arranged on the side, a rubber roller body 12 is arranged on the top of the carbon ribbon box 11, a rubber roller shaft 30 is fixedly connected to one side of the rubber roller body 12, a rubber roller gear 10 is sleeved and fixed to the outside of the rubber roller shaft 30, a recovery shaft 16 is arranged on one side of the rear end of the frame 1, a second coupling 29 is arranged on the rear end of the driven shaft 6, a supply shaft 17 is arranged on one side of the rear end of the frame 1, a shunt gear 4 is arranged between the friction transmission device 2 and the damping device 8, and a carbon ribbon body 14 is arranged on the outside of the recovery shaft 16 and the supply shaft 17;

[0023] The first coupling 13 can be connected to the recovery shaft 16 of the carbon ribbon cassette 11, the second coupling 29 is connected to the supply shaft 17 of the carbon ribbon cassette 11, and the supply shaft 17 is connected to the damping device 8;

[0024] A friction gear 22 is disposed inside the friction transmission device 2, a first friction plate 20 is disposed at the rear end of the friction gear 22, a second gasket 21 is disposed at the rear end of the first friction plate 20, a first gasket 18 is disposed at the rear end inside the friction transmission device 2, and a first spring 19 is fixedly connected between the first gasket 18 and the second gasket 21;

[0025] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, when the motor 9 rotates, the main shaft gear of the motor 9 drives the second gear 7 to rotate, the second gear 7 drives the first gear 5 to rotate, the first gear 5 drives the branch gear 4 to rotate, the branch gear 4 drives the rubber roller gear 10 and the friction gear 22 to rotate, the friction gear 22 drives the driving shaft 3 to rotate, the driving shaft 3 drives the recovery shaft 16 to rotate, the rubber roller gear 10 rotates to drive the rubber roller body 12 to rotate, thereby dragging the driven shaft 6 to rotate, the speed of the friction gear 22 is greater than the speed of the driving shaft 3, the friction gear 22 is always slipping, and the rubber roller body 12 is affected when driving the supply shaft 17 to rotate. The damping force causes the tensile stress on the carbon ribbon body 14 between the rubber roller body 12 and the supply shaft 17 to be concentrated on the side close to the damping device 8; when the friction transmission device 2 drives the recovery shaft 16 to work, the friction gear 22 is always slipping, and the tensile stress on the carbon ribbon body 14 between the recovery shaft 16 and the rubber roller body 12 is concentrated on the side close to the friction device. From the above analysis, it can be seen that during the transmission of the carbon ribbon body 14, the stress on the carbon ribbon body 14 is concentrated on the same side, and it is the same tensile stress, thereby avoiding the diagonal pulling of the carbon ribbon to cause the carbon ribbon to wrinkle.

[0026] Embodiment 2: The branch gear 4 is provided with two layers of gears, one layer is a large gear and the other layer is a small gear. The branch gear 4 is provided with two layers of gears, one layer is a large gear and the other layer is a small gear. The rubber roller gear 10 is meshed with the small gear.

[0027] A second gear 7 is provided on one side of the first gear 5. The second gear 7 is divided into two layers, one layer is a large gear and the other layer is a small gear. The large gear meshes with the main shaft gear of the motor 9, and the small gear meshes with the first gear 5.

[0028] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, under the action of the branch gear 4, the rotation speed of the friction gear 22 is greater than the rotation speed of the rubber roller gear 10, and because the carbon ribbon body 14 is connected, the linear speed of the recovery shaft 16 is equal to the linear speed of the rubber roller body 12, so the rotation speed of the friction gear 22 is greater than the rotation speed of the driving shaft 3, and the friction gear 22 is always slipping relative to the second gasket 21. This ensures that the linear speed of the recovery shaft 16 is equal to the linear speed of the rubber roller body 12, and the carbon ribbon body 14 is not broken, which protects the carbon ribbon body 14.

[0029] Embodiment 3: The damping device 8 is provided with a housing 23, a driven shaft 6 is provided inside the housing 23, a center hole is provided in the housing 23 and is fixed concentrically with the circular hole of the frame 1, a second friction plate 24 is fixedly connected to the front end of the housing 23, a third gasket 25 is fixedly connected to the rear end of the second friction plate 24, a fourth gasket 27 is provided to the rear end of the third gasket 25, a second spring 26 is fixedly connected between the third gasket 25 and the fourth gasket 27, and a second coupling 29 is sleeved on the rear end of the driven shaft 6;

[0030] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the housing 23 is provided with a center hole which is concentrically fixed with the circular hole on the frame 1, and the driven shaft 6 is rotatably connected to the concentric holes of the housing 23 and the frame 1, ensuring that the driven shaft 6 has a sufficient limiting height, thereby preventing the driven shaft 6 from having excessive shaking; one end of the driven shaft 6 extends beyond the housing 23 and is hinged to the first gear 5, and the driven shaft 6 and the rotating shaft of the second gear 7 are combined into one, which simplifies the structure and saves space. A second friction plate 24 and a third gasket 25 are provided on the inner side of the housing 23 of the damping device 8, and the third gasket 25 is non-rotatably connected to the driven shaft 6. One end of the second spring 26 abuts on the third gasket 25, and the other end abuts on the fourth gasket 27. The other side of the fourth gasket 27 is limited by the driven shaft 6. Under the action of the second spring 26, the rotation of the third gasket 25 will generate friction on the second friction plate 24, thereby making the driven shaft 6 have a damping effect.

[0031] Working principle: When the utility model is in use, first, when the motor 9 rotates, the main shaft gear of the motor 9 drives the second gear 7 to rotate, the second gear 7 drives the first gear 5 to rotate, the first gear 5 drives the branch gear 4 to rotate, the branch gear 4 drives the rubber roller gear 10 and the friction gear 22 to rotate, the friction gear 22 drives the driving shaft 3 to rotate, the driving shaft 3 drives the recovery shaft 16 to rotate, the rotation of the rubber roller gear 10 drives the rubber roller body 12 to rotate, thereby dragging the driven shaft 6 to rotate, the rotation speed of the friction gear 22 is greater than the rotation speed of the driving shaft 3, the friction gear 22 wheel is always slipping, and the rubber roller body 12 drives the supply shaft 17 to rotate, which is subjected to the damping force, so that the tensile stress of the carbon ribbon body 14 between the rubber roller body 12 and the supply shaft 17 is concentrated on the side close to the damping device 8 When the friction transmission device 2 drives the recovery shaft 16 to work, the friction gear 22 is always slipping, and the tensile stress on the carbon ribbon body 14 between the recovery shaft 16 and the rubber roller body 12 is concentrated on the side close to the friction device. From the above analysis, it can be seen that during the transmission of the carbon ribbon body 14, the stress on the carbon ribbon body 14 is concentrated on the same side, and it is also tensile stress, thereby avoiding the diagonal pulling of the carbon ribbon to cause the carbon ribbon wrinkles. Afterwards, under the action of the branch gear 4, the rotation speed of the friction gear 22 is greater than the rotation speed of the rubber roller gear 10, and because the carbon ribbon body 14 is connected, the linear speed of the recovery shaft 16 = the linear speed of the rubber roller body 12, so the rotation speed of the friction gear 22 is greater than the rotation speed of the driving shaft 3, and the friction gear 22 is always slipping relative to the second gasket 21. Thus, it is ensured that the linear speed of the recovery shaft 16 is equal to the linear speed of the rubber roller body 12, and the carbon ribbon body 14 is not broken, which plays a protective role on the carbon ribbon body 14. Finally, the housing 23 is provided with a center hole which is fixed concentrically with the circular hole on the frame 1, and the driven shaft 6 is rotatably connected to the concentric holes of the housing 23 and the frame 1, ensuring that the driven shaft 6 has a sufficient limit height, thereby preventing the driven shaft 6 from having excessive shaking; one end of the driven shaft 6 extends beyond the housing 23 and is hinged to the first gear 5, and the driven shaft 6 is connected to the second gear 7. The two rotating shafts are combined into one, which simplifies the structure and saves space. A second friction plate 24 and a third gasket 25 are provided on the inner side of the outer shell 23 of the damping device 8. The third gasket 25 is non-rotatably connected to the driven shaft 6. One end of the second spring 26 abuts on the third gasket 25, and the other end abuts on the fourth gasket 27. The other side of the fourth gasket 27 is limited by the driven shaft 6. Under the action of the second spring 26, the rotation of the third gasket 25 will generate friction on the second friction plate 24, thereby making the driven shaft 6 have a damping effect.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A carbon ribbon conveying device, comprising a frame (1) and a first gasket (18), characterized in that: A friction transmission device (2) is provided on one side of the front end of the frame (1), a damping device (8) is provided on the other side of the front end of the frame (1), a motor (9) is fixedly mounted on one side of the rear end of the frame (1), a first gear (5) is provided on the front end of the damping device (8), a driven shaft (6) is provided inside the first gear (5), a driving shaft (3) is provided inside the friction transmission device (2), a first coupling (13) is provided at the rear end of the driving shaft (3), a print head (15) is provided at the rear end of the frame (1), and carbon ribbon boxes (11) are provided on both sides of the rear end of the frame (1), A rubber roller body (12) is arranged at the top of the carbon ribbon box (11), a rubber roller shaft (30) is fixedly connected to one side of the rubber roller body (12), a rubber roller gear (10) is sleeved and fixed to the outside of the rubber roller shaft (30), a recovery shaft (16) is arranged at one side of the rear end of the frame (1), a second coupling (29) is arranged at the rear end of the driven shaft (6), a supply shaft (17) is arranged at one side of the rear end of the frame (1), a branch gear (4) is arranged between the friction transmission device (2) and the damping device (8), and a carbon ribbon body (14) is arranged outside the recovery shaft (16) and the supply shaft (17).

2. A carbon ribbon conveying device according to claim 1, characterized in that: The first coupling (13) can be connected to the recovery shaft (16) of the carbon ribbon box (11), the second coupling (29) is connected to the supply shaft (17) of the carbon ribbon box (11), and the supply shaft (17) is connected to the damping device (8).

3. A carbon ribbon conveying device according to claim 1, characterized in that: A friction gear (22) is arranged inside the friction transmission device (2), a first friction plate (20) is arranged at the rear end of the friction gear (22), a second gasket (21) is arranged at the rear end of the first friction plate (20), a first gasket (18) is arranged at the rear end inside the friction transmission device (2), and a first spring (19) is fixedly connected between the first gasket (18) and the second gasket (21).

4. A carbon ribbon conveying device according to claim 1, characterized in that: The branch gear (4) is provided with two layers of gears, one layer is a large gear and the other layer is a small gear, and the rubber roller gear (10) is meshed with the small gear.

5. A carbon ribbon conveying device according to claim 1, characterized in that: A second gear (7) is provided on one side of the first gear (5), and the second gear (7) is divided into two layers, one layer is a large gear, and the other layer is a small gear. The large gear is meshed with the main shaft gear of the motor (9), and the small gear is meshed with the first gear (5).

6. A carbon ribbon conveying device according to claim 1, characterized in that: The damping device (8) is provided with a shell (23), a driven shaft (6) is provided inside the shell (23), the shell (23) is provided with a center hole which is fixed concentrically with the circular hole of the frame (1), a second friction plate (24) is fixedly connected to the front end of the shell (23), a third gasket (25) is fixedly connected to the rear end of the second friction plate (24), a fourth gasket (27) is provided at the rear end of the third gasket (25), a second spring (26) is fixedly connected between the third gasket (25) and the fourth gasket (27), and a second coupling (29) is sleeved on the rear end of the driven shaft (6).

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