Thermal transfer ribbon releasing mechanism capable of automatically pulling back and tightening

Abstract

The utility model relates to the technical field of printers, and discloses an automatic pull-back tightening thermal transfer ribbon releasing mechanism which comprises a supporting plate, a thermal transfer ribbon winding roller and a thermal transfer ribbon releasing roller, the thermal transfer ribbon winding roller is located at the right end of the back face of the supporting plate, the thermal transfer ribbon releasing roller is located at the left end of the back face of the supporting plate, and a thermal transfer ribbon body is arranged on the outer wall of the thermal transfer ribbon releasing roller. And one end of the thermal transfer ribbon body is arranged on a thermal transfer ribbon winding roller. When the thermal transfer ribbon releasing roller rotates to release the thermal transfer ribbon, the thermal transfer ribbon releasing roller drives the connecting shaft and the iron block to rotate at the same time, the limiting cover is driven to rotate through the magnetic adsorption force between the iron block and the magnetic ring, and the limiting cover stretches one end of the elastic rope at the same time; when the stretching elasticity of the elastic rope is larger than the magnetic adsorption force between the iron block and the magnetic ring, a reverse pulling force is provided for the released thermal transfer ribbon, so that the thermal transfer ribbon is kept tightened when being released, meanwhile, elastic buffering of the thermal transfer ribbon is achieved, and therefore the thermal transfer ribbon can be automatically pulled back and tightened conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, and more specifically to an automatic pulling-back and tightening carbon ribbon releasing mechanism. Background Art

[0002] Carbon ribbon, also known as thermal transfer ribbon, is a consumable material specially used in thermal transfer printers. Its main function is to transfer toner from the ribbon to the medium under the action of heat, so as to produce a durable and clear printing effect. Carbon ribbon is widely used in many fields such as labels, barcodes, clothing labels, electronic product labels, etc. In thermal transfer printers, the carbon ribbon needs to be continuously released to contact the medium, and the carbon ribbon needs to be pulled back and tightened when it is released.

[0003] At present, the carbon ribbon release mechanism of the carbon ribbon printer adopts the method of motor plus gear deceleration. When the carbon ribbon is released, the motor is stopped or appropriately reversed to pull the carbon ribbon back and straighten it. This method has no buffering effect and is prone to cause the carbon ribbon to break or the motor to be damaged, thus affecting the subsequent operation of the printer and needs to be improved. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides an automatic retractable and tightened carbon ribbon release mechanism to solve the problems existing in the above-mentioned background technology.

[0005] The utility model provides the following technical solutions: an automatic retracted and tightened carbon ribbon release mechanism, comprising a support plate, a carbon ribbon winding roller and a carbon ribbon release roller, wherein the carbon ribbon winding roller is located at the right end of the back side of the support plate, and the carbon ribbon release roller is located at the left end of the back side of the support plate, and the outer wall of the carbon ribbon release roller is provided with a carbon ribbon body, and one end of the carbon ribbon body is arranged on the carbon ribbon winding roller, and a carbon ribbon release driving mechanism is installed at the right end of the front side of the support plate, and the carbon ribbon release driving mechanism includes a protective cover, and a worm and a worm gear are arranged inside the protective cover, and the The worm wheel is located below the worm, and the worm is meshed with the worm wheel. A driving shaft is fixedly sleeved inside the worm wheel. A carbon belt pulling back and tightening mechanism is provided at the left end of the front side of the support plate. The carbon belt pulling back and tightening mechanism includes a connecting shaft. A limiting cover is movably sleeved on the outer wall of the connecting shaft, and a magnetic ring is fixedly sleeved on the middle part of the inner wall of the limiting cover. A plurality of iron blocks are fixedly sleeved on the outer wall of the connecting shaft, and the outer walls of the plurality of iron blocks are arranged inside the magnetic ring. The magnetic ring and the iron blocks are magnetically connected, and an elastic rope is fixedly connected to the right side of the limiting cover.

[0006] Furthermore, a mounting plate No. 1 is fixedly installed at the front end of the carbon ribbon winding roller, a bearing No. 1 is fixedly installed at the right end inside the support plate, the outer wall of the drive shaft is rotatably installed inside the bearing No. 1, the rear end of the drive shaft is fixedly connected to the front side of the mounting plate No. 1, and the front end of the drive shaft is rotatably connected to the inner wall of the protective cover.

[0007] Further, a motor is fixedly installed on the right side of the protective cover. The output end of the motor extends into the protective cover and is fixedly connected to the right end of a worm. The left end of the worm is rotatably connected to the left side of the inner wall of the protective cover.

[0008] Further, a positioning block is fixedly connected to the front surface of the support plate. One end of the elastic cord is fixedly connected to the left side of the positioning block. The initial elastic force of the elastic cord is less than the magnetic adsorption force between the magnetic ring and the iron block.

[0009] Further, a second bearing is fixedly installed at the left end inside the support plate. The outer wall of the connecting shaft is rotatably installed inside the second bearing. The rear end of the connecting shaft is fixedly connected to a second mounting plate. The front end of the carbon ribbon release roller is fixedly installed on the back surface of the second mounting plate.

[0010] Further, a plurality of balls are rotatably embedded on both sides inside the limiting cover. An annular rolling groove is formed on the outer wall of the connecting shaft. The outer walls of the balls are rollingly arranged inside the annular rolling groove.

[0011] Technical effects and advantages of the present utility model:

[0012] 1. While the carbon ribbon release roller rotates to release the carbon ribbon in the present utility model, the carbon ribbon release roller simultaneously drives the connecting shaft and the iron block to rotate, and uses the magnetic adsorption force between the iron block and the magnetic ring to drive the limiting cover to rotate. The limiting cover simultaneously stretches one end of the elastic cord. When the elastic force generated by the stretching of the elastic cord is greater than the magnetic adsorption force between the iron block and the magnetic ring, a reverse pulling force is provided to the released carbon ribbon, so that the carbon ribbon remains taut during release, and at the same time, elastic buffering of the carbon ribbon is achieved, thereby facilitating automatic retraction and tensioning of the carbon ribbon.

[0013] 2. By adopting the cooperation of the protective cover, the motor, the worm, the worm gear, the drive shaft and the first bearing in the present utility model, the motor, the worm and the worm gear are used to drive the drive shaft to rotate conveniently, and the drive shaft drives the carbon ribbon winding roller to rotate, thereby facilitating the winding operation of the carbon ribbon. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 It is a schematic cross-sectional view of the side structure of the limiting cover and the magnetic ring of the present utility model.

[0016] Figure 3 It is a three-dimensional cross-sectional view of the side structure of the limiting cover and the magnetic ring of the present utility model.

[0017] Figure 4 It is a schematic diagram of the structure of the connecting shaft, the iron block and the annular rolling groove of the present utility model.

[0018] The reference numerals are: 1, support plate; 2, carbon ribbon winding roller; 21, first mounting plate; 3, carbon ribbon releasing roller; 31, second mounting plate; 4, carbon ribbon body; 5, carbon ribbon releasing driving mechanism; 51, protective cover; 52, motor; 53, worm; 54, worm gear; 55, driving shaft; 56, first bearing; 6, carbon ribbon pulling-back and tensioning mechanism; 61, connecting shaft; 62, second bearing; 63, limiting cover; 64, magnetic ring; 65, iron block; 66, ball; 67, annular rolling groove; 68, elastic cord; 69, positioning block. Detailed implementation manners

[0019] Next, the technical solutions in the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the present utility model. In addition, the forms of each structure described in the following implementation manners are merely examples, and an automatically pulling-back and tensioning carbon ribbon releasing mechanism related to the present utility model is not limited to the structures described in the following implementation manners. All other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0020] Embodiment 1:

[0021] As Figures 1-4 shown, an automatically pulling-back and tensioning carbon ribbon releasing mechanism includes a support plate 1, a carbon ribbon winding roller 2 and a carbon ribbon releasing roller 3. The carbon ribbon winding roller 2 is located at the right end of the back surface of the support plate 1, and the carbon ribbon releasing roller 3 is located at the left end of the back surface of the support plate 1. The outer wall of the carbon ribbon releasing roller 3 is provided with a carbon ribbon body 4. One end of the carbon ribbon body 4 is arranged on the carbon ribbon winding roller 2. A carbon ribbon releasing driving mechanism 5 is installed at the right end of the front surface of the support plate 1. The carbon ribbon releasing driving mechanism 5 includes a protective cover 51. Inside the protective cover 51, there are a worm 53 and a worm gear 54. The worm gear 54 is located below the worm 53. The worm 53 meshes with the worm gear 54. A driving shaft 55 is fixedly sleeved inside the worm gear 54. A first mounting plate 21 is fixedly installed at the front end of the carbon ribbon winding roller 2. A first bearing 56 is fixedly installed at the right end inside the support plate 1. The outer wall of the driving shaft 55 is rotatably installed inside the first bearing 56. The rear end of the driving shaft 55 is fixedly connected to the front surface of the first mounting plate 21. The front end of the driving shaft 55 is rotatably connected to the inner wall of the protective cover 51. A motor 52 is fixedly installed on the right side of the protective cover 51. The output end of the motor 52 extends into the protective cover 51 and is fixedly connected to the right end of the worm 53. The left end of the worm 53 is rotatably connected to the left side of the inner wall of the protective cover 51.

[0022] In this embodiment, through the setting of the protective cover 51, it is convenient to protect one end of the worm 53, the worm gear 54 and the drive shaft 55. Through the cooperation of the motor 52, the worm 53 and the worm gear 54, it is convenient to drive the drive shaft 55 to rotate inside the first bearing 56. The drive shaft 55 drives the carbon ribbon winding roller 2 through the first mounting plate 21, facilitating the winding operation of the carbon ribbon body 4.

[0023] Embodiment Two:

[0024] As Figures 1-4 shown, a carbon ribbon pulling and tensioning mechanism 6 is provided at the left end of the front surface of the support plate 1. The carbon ribbon pulling and tensioning mechanism 6 includes a connecting shaft 61. A limiting cover 63 is movably sleeved on the outer wall of the connecting shaft 61. A magnetic ring 64 is fixedly sleeved in the middle of the inner wall of the limiting cover 63. A plurality of iron blocks 65 are fixedly sleeved on the outer wall of the connecting shaft 61. The outer walls of the plurality of iron blocks 65 are arranged inside the magnetic ring 64. The magnetic ring 64 and the iron blocks 65 are magnetically connected. A elastic cord 68 is fixedly connected to the right side of the limiting cover 63. A positioning block 69 is fixedly connected to the front surface of the support plate 1. One end of the elastic cord 68 is fixedly connected to the left side of the positioning block 69. The initial elastic force of the elastic cord 68 is less than the magnetic adsorption force between the magnetic ring 64 and the iron blocks 65. A plurality of ball bearings 66 are rotatably embedded on both sides inside the limiting cover 63. An annular rolling groove 67 is formed on the outer wall of the connecting shaft 61. The outer walls of the ball bearings 66 are rollingly arranged inside the annular rolling groove 67. A second bearing 62 is fixedly installed at the left end inside the support plate 1. The outer wall of the connecting shaft 61 is rotatably installed inside the second bearing 62. The rear end of the connecting shaft 61 is fixedly connected to a second mounting plate 31. The front end of the carbon ribbon releasing roller 3 is fixedly installed on the back surface of the second mounting plate 31.

[0025] In this embodiment, when the carbon ribbon body 4 is released on the carbon ribbon releasing roller 3, it will drive the carbon ribbon releasing roller 3 to rotate. The carbon ribbon releasing roller 3 drives the connecting shaft 61 through the second mounting plate 31. At the same time, by using the magnetic adsorption force between the iron blocks 65 and the magnetic ring 64, the connecting shaft 61 can drive the limiting cover 63 to rotate. The limiting cover 63 stretches one end of the elastic cord 68. As the elastic cord 68 is stretched to a certain length, its elastic tension will gradually increase. When the elastic tension of the elastic cord 68 is greater than the magnetic adsorption force between the iron blocks 65 and the magnetic ring 64, a reverse pulling force is applied to the limiting cover 63, the connecting shaft 61, the carbon ribbon releasing roller 3 and the carbon ribbon body 4, so that the carbon ribbon remains taut during release.

[0026] In summary, as Figures 1-4As shown in the figure, for this automatic retractable and tensioned carbon tape release mechanism, during use, the output end of the motor 52 drives the worm 53 to rotate. The worm 53 drives the worm gear 54 and the drive shaft 55 to rotate. One end of the drive shaft 55 drives the carbon tape winding roller 2 through the first mounting plate 21 to wind one end of the carbon tape body 4. At the same time, the carbon tape body 4 drives the carbon tape release roller 3 to rotate. One end of the carbon tape release roller 3 drives the connecting shaft 61 and the iron block 65 to rotate through the second mounting plate 31, and uses the magnetic adsorption force between the iron block 65 and the magnetic ring 64 to drive the limit cover 63 to rotate on the outer wall of the connecting shaft 61. The limit cover 63 simultaneously stretches one end of the elastic cord 68. When the elasticity of the stretched elastic cord 68 is greater than the magnetic adsorption force between the iron block 65 and the magnetic ring 64, a reverse pulling force is applied to the limit cover 63, the connecting shaft 61, the carbon tape release roller 3 and the carbon tape body 4, so that the carbon tape remains taut when released.

[0027] Finally, the following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the communication inside two components, and can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0028] Second: In the drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0029] Finally: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automatically retractable and tensioned carbon ribbon release mechanism, comprising a support plate (1), a carbon ribbon winding roller (2), and a carbon ribbon release roller (3), characterized in that, The carbon ribbon winding roller (2) is located at the right end of the back surface of the support plate (1), the carbon ribbon releasing roller (3) is located at the left end of the back surface of the support plate (1), a carbon ribbon body (4) is provided on the outer wall of the carbon ribbon releasing roller (3), one end of the carbon ribbon body (4) is arranged on the carbon ribbon winding roller (2), a carbon ribbon releasing driving mechanism (5) is installed at the right end of the front surface of the support plate (1), the carbon ribbon releasing driving mechanism (5) includes a protective cover (51), a worm (53) and a worm gear (54) are arranged inside the protective cover (51), the worm gear (54) is located below the worm (53), the worm (53) meshes with the worm gear (54), a driving shaft (55) is fixedly sleeved inside the worm gear (54), a carbon ribbon pulling-back and tensioning mechanism (6) is arranged at the left end of the front surface of the support plate (1), the carbon ribbon pulling-back and tensioning mechanism (6) includes a connecting shaft (61), a limiting cover (63) is movably sleeved on the outer wall of the connecting shaft (61), a magnetic ring (64) is fixedly sleeved in the middle of the inner wall of the limiting cover (63), a plurality of iron blocks (65) are fixedly sleeved on the outer wall of the connecting shaft (61), the outer walls of the plurality of iron blocks (65) are arranged inside the magnetic ring (64), and the magnetic ring (64) is magnetically connected to the iron blocks (65), and an elastic cord (68) is fixedly connected to the right side of the limiting cover (63).

2. The automatic retracting and tensioning carbon ribbon release mechanism according to claim 1, wherein: A first mounting plate (21) is fixedly installed at the front end of the carbon ribbon winding roller (2), a first bearing (56) is fixedly installed at the right end inside the support plate (1), the outer wall of the driving shaft (55) is rotatably installed inside the first bearing (56), the rear end of the driving shaft (55) is fixedly connected to the front surface of the first mounting plate (21), and the front end of the driving shaft (55) is rotatably connected to the inner wall of the protective cover (51).

3. An automatically retractable and tensioned carbon ribbon release mechanism according to claim 1, characterized in that: A motor (52) is fixedly installed on the right side of the protective cover (51), the output end of the motor (52) extends into the protective cover (51) and is fixedly connected to the right end of the worm (53), and the left end of the worm (53) is rotatably connected to the left side of the inner wall of the protective cover (51).

4. An automatically retractable and tensioned carbon ribbon release mechanism according to claim 1, characterized in that: A positioning block (69) is fixedly connected to the front surface of the support plate (1), one end of the elastic cord (68) is fixedly connected to the left side of the positioning block (69), and the initial elastic force of the elastic cord (68) is less than the magnetic adsorption force between the magnetic ring (64) and the iron blocks (65).

5. An automatically retractable and tensioned carbon ribbon release mechanism according to claim 1, characterized in that: A second bearing (62) is fixedly installed at the left end inside the support plate (1), the outer wall of the connecting shaft (61) is rotatably installed inside the second bearing (62), the rear end of the connecting shaft (61) is fixedly connected to a second mounting plate (31), and the front end of the carbon ribbon releasing roller (3) is fixedly installed on the back surface of the second mounting plate (31).

6. An automatically retractable and tensioned carbon ribbon release mechanism according to claim 1, characterized in that: A plurality of balls (66) are rotatably embedded on both sides inside the limiting cover (63), an annular rolling groove (67) is formed on the outer wall of the connecting shaft (61), and the outer walls of the balls (66) are rollingly arranged inside the annular rolling groove (67).

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