Carbon ribbon flattening structure and carbon ribbon printer

Abstract

The present application discloses a carbon ribbon flattening structure and a carbon ribbon printer. The carbon ribbon flattening structure includes a base and at least one flattening rod; each flattening rod is arranged between the carbon ribbon release shaft and the printing mechanism and / or between the printing mechanism and the carbon ribbon winding shaft; the base is provided with positioning units equal in number to the flattening rods and corresponding one to one; the positioning units include a supporting portion and two positioning portions; the two positioning portions are arranged along a first direction and are both provided with positioning holes that cooperate with the ends of the flattening rods, and the projections of the two positioning holes on the projection plane perpendicular to the first direction coincide; the supporting portion supports the middle part of the flattening rod along a second direction perpendicular to the first direction and the movement direction of the carbon ribbon to bend the flattening rod so that the carbon ribbon is flattened by the flattening rod when passing through the outer surface of the flattening rod. The relevant carbon ribbon printer adopts the above-mentioned carbon ribbon flattening structure. The above-mentioned technical solution can have the characteristics of occupying a small area in the paper feeding direction, simple processing, and low cost.

Description

Technical Field

[0001] The present application relates to the field of printers, and in particular to a carbon ribbon flattening structure and a carbon ribbon printer. Background Art

[0002] In the prior art, the use of carbon ribbon thermal transfer technology can achieve printing on ordinary paper. However, during the printing process, the carbon ribbon may wrinkle due to relaxation as it moves from the carbon ribbon release shaft through the printing mechanism to the carbon ribbon take-up shaft, causing the image and text on the printed paper to break or have other defects. In order to reduce the possibility of wrinkles in the carbon ribbon, known flattening mechanisms are generally divided into two categories. One category uses a flattening plate with several levels of flattening ribs provided on the flattening plate; the other category uses a flattening shaft with reverse threads processed from the center to both sides or directly processing part or the entire flattening shaft into a shuttle shape. For the technical solution using a flattening plate, since several levels of flattening ribs need to be provided on it, it will occupy a large area in the paper feeding direction, increasing the volume or horizontal area of ​​the carbon ribbon printer; for the technical solution using a special-shaped flattening shaft, since the flattening shaft needs to be processed into a special shape, the processing is complicated, the manufacturing difficulty is high, and the cost is also high. Summary of the Invention

[0003] The purpose of this application is to overcome the above-mentioned defects or problems in the background technology and to provide a carbon ribbon flattening structure and a carbon ribbon printer, which have the characteristics of occupying a small area in the paper feeding direction, being simple to process and having low cost.

[0004] In order to achieve the above objectives, the following technical solutions are adopted:

[0005] The first technical solution relates to a carbon ribbon flattening structure, which is used to flatten the carbon ribbon that moves from the carbon ribbon release shaft to the carbon ribbon winding shaft through the printing mechanism; it includes a base and at least one flattening rod; each flattening rod is arranged between the carbon ribbon release shaft and the printing mechanism and / or between the printing mechanism and the carbon ribbon winding shaft; the base is configured to allow the carbon ribbon release shaft and the carbon ribbon winding shaft to rotate relative to it around a rotation axis extending along a first direction; the base is also provided with positioning units that are equal in number to and correspond to the flattening rods; the positioning units include a supporting portion and two positioning portions; the two positioning portions are arranged along the first direction and are both provided with positioning holes that cooperate with the ends of the flattening rods, and the projections of the two positioning holes on the projection plane perpendicular to the first direction coincide; the supporting portion supports the middle part of the flattening rod along a second direction perpendicular to the first direction to bend the flattening rod so that the carbon ribbon is flattened by the flattening rod when passing through the outer surface of the flattening rod.

[0006] The second technical solution is based on the first technical solution, wherein the cross section of the flattening rod perpendicular to the first direction is circular.

[0007] The third technical solution is based on the second technical solution, wherein a first groove for the flattening rod to be seated therein is provided on the surface of the holding portion that holds the flattening rod.

[0008] The fourth technical solution is based on the third technical solution, wherein the base is provided with a second groove extending in the first direction and matching the outer edge of the flattening rod between the two positioning portions, and the supporting portion extends from the bottom of the second groove. The fifth technical solution is based on the fourth technical solution, wherein the flattening rod and the base are limitedly engaged along the first direction.

[0009] The sixth technical solution is a preferred embodiment of the fifth technical solution, wherein the flattening rod includes a rod body and step portions arranged at both ends of the rod body, and a step surface is formed between the rod body and the step portion; the step portion cooperates with the positioning hole, and the step surface is suitable for abutting against the positioning portion.

[0010] The seventh technical solution is another preferred embodiment of the fifth technical solution, wherein the two positioning holes are blind holes and their openings are opposite to each other along the first direction.

[0011] The eighth technical solution relates to a carbon ribbon printer, which includes a first part and a second part connected to each other, the first part is provided with a body, the body is provided with a accommodating cavity, the accommodating cavity is suitable for accommodating a carbon ribbon assembly, the carbon ribbon assembly includes a carbon ribbon holder, a carbon ribbon release shaft, a carbon ribbon take-up shaft and a carbon ribbon; the carbon ribbon holder is suitable for being accommodated in the accommodating cavity and is provided with two supporting parts, the two supporting parts are respectively used to support the carbon ribbon release shaft and the carbon ribbon take-up shaft, and allow the carbon ribbon release shaft and the carbon ribbon take-up shaft to rotate relative to the carbon ribbon holder around a rotation axis extending along a first direction, a printing area is formed between the two supporting parts, the carbon ribbon is wound around the carbon ribbon release shaft and the carbon ribbon take-up shaft; one of the first part and the second part is provided with a print head, and the other of the first part and the second part is provided with a drive roller; the print head and the drive roller cooperate to form a printing mechanism; the printing mechanism works within the printing area; wherein, the first part is provided with a carbon ribbon flattening structure as described in any one of the first to seventh technical solutions, and the body forms the base.

[0012] The ninth technical solution is based on the eighth technical solution, wherein at least a surface of the flattening rod is made of metal and its surface is grounded. The tenth technical solution is a preferred embodiment of the ninth technical solution, wherein the first portion or the second portion is provided with an elastic member, the elastic member being configured to elastically abut against an outer surface of the flattening rod when the ribbon printer is in operation, and the elastic member being electrically connected to a ground terminal of an internal circuit of the ribbon printer.

[0013] Compared with the prior art, the above solution has the following beneficial effects:

[0014] In the first technical solution, a flattening rod is provided between the ribbon release shaft and the printing mechanism and / or between the printing mechanism and the ribbon take-up shaft. Compared to the technical solution in which flattening ribs are provided on the flattening plate, this occupies less space in the paper feed direction, making the ribbon printer more portable. In the first technical solution, the supporting portion supports the middle portion of the flattening rod in a second direction perpendicular to the first direction, causing the flattening rod to bend. This allows the ribbon to move along the curved outer surface of the flattening rod, which has a convex center and low ends. This flattens the ribbon, prevents wrinkles in the ribbon, and thus prevents printing defects. In the first technical solution, the projections of the positioning holes on the projection plane perpendicular to the first direction overlap, ensuring that the flattening rod extends along the first direction when not supported by the supporting portion, and forms the predetermined curved state with a convex center and low ends when supported by the supporting portion. In the first technical solution, the positioning holes match the two ends of the flattening rod, and the flattening rod can be bent. Therefore, the assembler can easily assemble the flattening rod to the two positioning parts by inserting the two ends into the two positioning holes respectively along the first direction. When the flattening rod is assembled to the positioning part, it can be directly supported by the supporting part to form a preset bend. Therefore, the assembly process is simple and the labor cost is reduced. In this embodiment, since the flattening rod does not need to be processed into a special shape in the first direction, the processing is simple and the cost is low compared to the existing technical solution using a special-shaped flattening shaft. In the first technical solution, since the flattening rod occupies a small area along the direction of movement of the carbon ribbon, the flattening rod can be set between the carbon ribbon release shaft and the printing mechanism and between the printing mechanism and the carbon ribbon winding shaft, thereby achieving a better wrinkle prevention effect. In the first technical solution, the printing mechanism should be interpreted as a mechanism that realizes the thermal transfer function, generally including a print head (heating part) and a drive roller (driving the printing paper and carbon ribbon to move). In the first technical solution, the matching relationship between the positioning hole and the end of the flattening rod should be interpreted as the inner edge surface of the positioning hole matching the outer edge surface of the end of the flattening rod, and the two can be a tight fit or a loose fit. In the case of a tight fit, the flattening rod cannot rotate, and in the case of a loose fit, the positioning hole can allow the flattening rod to rotate. In the first technical solution, the supporting portion supporting the middle of the flattening rod along the second direction should be interpreted as ensuring that the flattening rod is bent to form a state in which the middle is convex and the two ends are low. This state makes it easier for the carbon ribbon to be flattened by the flattening rod when it passes through the outer surface of the flattening rod. In the second technical solution, the cross-section of the flattening rod perpendicular to the first direction is circular, so the cross-section of the positioning hole that matches the end of the flattening rod is also circular, and both are easier to manufacture and have lower costs.

[0015] In the third technical solution, a first groove is formed on the surface of the holding portion that holds the flattening rod, in which the flattening rod is seated. This is beneficial for the flattening rod to not separate from the holding portion when subjected to the friction caused by the movement of the carbon ribbon, thereby ensuring the reliability of the flattening effect.

[0016] In the fourth technical solution, a second groove extending along the first direction and matching the outer edge of the flattening rod is provided between the two positioning portions. This also helps prevent the flattening rod from disengaging from the holding portion when subjected to friction caused by the movement of the ribbon, thereby ensuring a reliable flattening effect. In the fifth technical solution, the flattening rod and the base cooperate in a limited position along the first direction, which helps maintain the ribbon in a direction perpendicular to the first direction and prevents it from deflecting.

[0017] In the sixth technical solution, since the end of the flattening rod is very easy to process the step portion, it is easy to process the step surface and the positioning portion to achieve the limited fit along the first direction.

[0018] In the seventh technical solution, since the two positioning holes are blind holes and their openings are opposite to each other along the first direction, the position-limiting fit along the first direction can be achieved without processing the flattening rod.

[0019] The eighth technical solution is to apply any one of the first to seventh technical solutions to a carbon ribbon printer, so the eighth technical solution can obtain the corresponding effects of the technical solutions it references.

[0020] In the ninth technical solution, by designing the flattening rod so that at least its surface is made of metal and is always grounded, static electricity on the carbon ribbon can be removed.

[0021] In the tenth technical solution, an elastic member is provided to elastically abut against the outer surface of the flattening rod, and the elastic member is then grounded, so that the flattening rod that may rotate can be effectively kept grounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the embodiment, the following briefly introduces the drawings required for use:

[0023] Figure 1 A perspective view of the ribbon printer in Example 1;

[0024] Figure 2 It is a front view of the ribbon printer in Example 1;

[0025] Figure 3 for Figure 2 AA sectional view;

[0026] Figure 4 is a three-dimensional diagram of the carbon ribbon assembly in Example 1;

[0027] Figure 5 This is a three-dimensional diagram of the ribbon printer in Example 1 after the flattening rod is removed;

[0028] Figure 6 for Figure 5 Magnified view of part B;

[0029] Figure 7 for Figure 5 Magnified view of the C part;

[0030] Figure 8 This is a schematic diagram of the cooperation between the positioning portion and the flattening rod in Example 1;

[0031] Figure 9 This is a schematic diagram of the cooperation between the positioning portion and the flattening rod in the second embodiment.

[0032] Description of main reference numerals:

[0033] Ribbon printer 1; first part 2; second part 3; main body 4; accommodating chamber 5; ribbon assembly 6; ribbon holder 7; ribbon release shaft 8; ribbon take-up shaft 9; ribbon 10; supporting portion 11; connecting portion 11a; printing area 12; print head 13; driving roller 14; printing mechanism 15; flattening rod 16; rod body 16a; step portion 16b; step surface 16c; positioning unit 17; supporting portion 18; positioning portion 19; positioning hole 20; first groove 21; second groove 22; elastic member 25; base 26; first direction 27; second direction 28; movement direction of ribbon 29. DETAILED DESCRIPTION

[0034] In the claims and the description, unless otherwise defined, the terms "first", "second" or "third", etc. are intended to distinguish different objects rather than to describe a specific order.

[0035] In the claims and the specification, unless otherwise specified, the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are based on the directions and positional relationships shown in the accompanying drawings and are only for the convenience of simplifying the description, and do not imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction.

[0036] In the claims and description, unless otherwise specified, the term "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method in which there is no displacement relationship or relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection, and fixed connection through other devices or elements.

[0037] In the claims and the description, unless otherwise defined, the terms "include", "have" and their variations mean "including but not limited to".

[0038] The technical solutions in the embodiments will be described clearly and completely below with reference to the accompanying drawings.

[0039] Example 1

[0040] See also Figure 1 , Figure 1 FIG. 1 shows a ribbon printer 1 in the first embodiment. Figure 1 As shown, the ribbon printer 1 includes a first part 2 and a second part 3 connected to each other. In this embodiment, the first part 2 and the second part 3 are rotatably connected. Of course, any other connection method is feasible, as long as the ribbon printer 1 can achieve the printing function through the connection between the first part 2 and the second part 3. Since the connection method between the first part 2 and the second part 3 does not involve the solution of the technical problem in this application, it will not be described here. In this embodiment, the first part 2 is located at the bottom and the second part 3 is located at the top. In other embodiments, it is also allowed for the first part 2 to be located at the top and the second part 3 to be located at the bottom.

[0041] See also Figure 1 In this embodiment, the first part 2 includes a body 4, a ribbon assembly 6, a print head 13, two flattening rods 16, and an elastic member 25. The first part 2 may also have other parts, but they are not related to the solution of the technical problem in this application and are therefore not listed here.

[0042] See also Figure 3 In this embodiment, the main body 4 is the bottom shell of the carbon ribbon printer 1. The main body 4 is provided with a accommodating cavity 5, and the accommodating cavity 5 is used to accommodate the carbon ribbon assembly 6.

[0043] See also Figure 4 The carbon ribbon assembly 6 includes a carbon ribbon holder 7, a carbon ribbon release shaft 8, a carbon ribbon take-up shaft 9, and a carbon ribbon 10. The carbon ribbon holder 7 is suitable for being accommodated in the accommodating chamber 5. The carbon ribbon holder 7 is provided with two supporting parts 11 and two connecting parts for connecting the two supporting parts 11 into one body. The two connecting parts are respectively located at the two ends of the carbon ribbon holder 7 along the first direction 27. The two supporting parts 11 respectively support the carbon ribbon release shaft 8 and the carbon ribbon take-up shaft 9, and allow the carbon ribbon release shaft 8 and the carbon ribbon take-up shaft 9 to rotate relative to the carbon ribbon holder 7 around a rotation axis extending along the first direction 27. The two supporting parts 11 are combined to form a printing area 12. In this embodiment, the printing area 12 is also between the two connecting parts. The carbon ribbon 10 is wound on the carbon ribbon release shaft 8 and the carbon ribbon take-up shaft 9. In this embodiment, the printing area 12 between the two supporting parts 11 is narrower along the movement direction 29 of the carbon ribbon to save the occupied area of ​​the carbon ribbon printer 1.

[0044] See also Figure 3In this embodiment, the first portion 2 is further provided with a print head 13, and the second portion 3 is provided with a drive roller 14. The print head 13 and the drive roller 14 together form a printing mechanism 15. During the printing process, the drive roller 14 is used to drive the paper and the ribbon 10, and the print head 13 is used to heat the ribbon 10, causing the ink on the ribbon 10 to be thermally transferred to the paper. In this application, the printing mechanism 15 should be interpreted as a mechanism that performs the thermal transfer function. Of course, in other embodiments, the first portion 2 can be provided with the drive roller 14, and the second portion 3 can be provided with the print head 13.

[0045] See also Figures 1 to 3 In this embodiment, two flattening rods 16 are disposed within the printing area 12, and are disposed between the ribbon release shaft 8 and the printing mechanism 15, and between the printing mechanism 15 and the ribbon take-up shaft 9, respectively. The flattening rods 16 in this embodiment have a circular cross-section perpendicular to the first direction 27 and are made entirely of metal, specifically steel. In other embodiments, the flattening rods 16 may also be made of a composite material, and generally, their surfaces, particularly their outer edges, may be made of metal. Figure 8 In this embodiment, the flattening rod 16 includes a rod body and step portions provided at both ends of the rod body, and a step surface is formed between the rod body and the step portions.

[0046] See also Figures 5 to 7 , the main body 4 is provided with positioning units 17 that are equal in number and one-to-one corresponding to the flattening rods 16. The number of positioning units 17 in this embodiment is two, which are respectively provided corresponding to the two flattening rods 16. Each positioning unit 17 includes a supporting portion 18 and two positioning portions 19. The two positioning portions 19 are arranged along the first direction 27 and are both provided with positioning holes 20 that match the ends of the flattening rods 16. The two positioning holes 20 of the same positioning unit 17 coincide in their projections on the projection plane perpendicular to the first direction 27. The specific meaning of the matching here is that the inner edge surface of the positioning hole 20 matches the outer edge surface of the end of the flattening rod 16, and the two can be a tight fit or a loose fit. In the case of a tight fit, the flattening rod 16 cannot rotate, and in the case of a loose fit, the positioning hole 20 can allow the flattening rod 16 to rotate. As Figure 8As shown, in this embodiment, the stepped portion at the end of the flattening rod 16 engages with the positioning hole 20, and the stepped surface of the stepped portion abuts the positioning portion 19. Thus, a position-limiting engagement along a first direction 27 is established between the flattening rod 16 and the corresponding two positioning portions 19. In this embodiment, the body 4 further includes a second groove 22 between the two positioning portions 19 that matches the outer edge of the flattening rod 16. The second groove 22 extends along the first direction 27. The supporting portion 18 extends from the bottom of the middle portion of the second groove 22. The extending direction is a second direction 28 that is perpendicular to the first direction 27 and the direction of movement 29 of the carbon ribbon. The upper surface of the supporting portion 18 supports the middle portion of the flattening rod 16 along the second direction 28. This upper surface is provided with a first groove 21 in which the middle portion of the flattening rod 16 is seated. In this embodiment, the first groove 21 also matches the outer edge of the middle portion of the flattening rod 16. In the present application, the holding portion 18 holding the middle portion of the flattening rod 16 along the second direction 28 should be interpreted as ensuring that the flattening rod 16 is bent to form a convex middle portion and low ends. This configuration facilitates the flattening of the ribbon 10 by the flattening rod 16 when it passes over the outer surface of the flattening rod 16.

[0047] like Figure 3 and Figure 6 As shown, the elastic member 25 is mounted on the main body 4 and is made of metal to facilitate electrical conductivity. In this embodiment, the elastic member 25 is configured to constantly elastically contact the outer surface of the flattening rod 16. The elastic member 25 is also electrically connected to the ground terminal of the internal circuitry of the ribbon printer 1 to ensure that the flattening rod 16 remains grounded. In other embodiments, the elastic member 25 can also be located on the second portion 3, as long as it ensures that the elastic member 25 elastically contacts the outer surface of the flattening rod 16 during operation.

[0048] In this embodiment, a flattening rod 16 is provided between the ribbon release shaft 8 and the printing mechanism 15 and between the printing mechanism 15 and the ribbon winding shaft 9. Compared with the technical solution of providing flattening ribs on the flat plate, the flattening rod 16 occupies a smaller area in the paper feeding direction, and can make the ribbon printer 1 more portable.

[0049] In this embodiment, the supporting portion 18 supports the middle part of the flattening rod 16 along a second direction 28 perpendicular to the first direction 27 to bend the flattening rod 16, thereby enabling the carbon ribbon 10 to move on the curved outer surface of the flattening rod 16 which is convex in the middle and low at both ends, thereby achieving a flattening effect, preventing the carbon ribbon 10 from wrinkling, and further preventing the occurrence of printing defects.

[0050] In this embodiment, the projections of the positioning holes 20 on the projection plane perpendicular to the first direction 27 overlap, thereby ensuring that the flattening rod 16 extends along the first direction 27 when there is no supporting portion 18 to support it, and when supported by the supporting portion 18, it can form a preset bending state with a convex middle and low two ends.

[0051] In this embodiment, the positioning holes 20 cooperate with the two ends of the flattening rod 16, and the flattening rod 16 can be bent. Therefore, the assembler can easily assemble the flattening rod 16 to the two positioning parts 19 by inserting the two ends into the two positioning holes 20 respectively along the first direction 27. When the flattening rod 16 is assembled to the positioning part 19, it can be directly pushed by the supporting part 18 to form a preset bend. Therefore, the assembly process is simple and the labor cost is reduced.

[0052] In this embodiment, since the flattening rod 16 does not need to be processed into a special shape in the first direction 27, the processing is simpler and the cost is lower than the existing technical solution using a special-shaped flattening shaft.

[0053] In this embodiment, since the flattening rod 16 occupies a small area along the movement direction of the carbon ribbon 10, the flattening rod 16 can be set between the carbon ribbon release shaft 8 and the printing mechanism 15 and between the printing mechanism 15 and the carbon ribbon winding shaft 9, thereby achieving a better wrinkle prevention effect.

[0054] In this embodiment, the cross section of the flattening rod 16 perpendicular to the first direction 27 is circular, so the cross section of the positioning hole 20 that matches the end of the flattening rod 16 is also circular, both of which are easier to manufacture and have lower costs.

[0055] In this embodiment, a first groove 21 is formed on the surface of the supporting portion 18 that supports the flattening rod 16, in which the flattening rod 16 is seated. This is beneficial for the flattening rod 16 not to separate from the supporting portion 18 when subjected to the friction caused by the movement of the carbon ribbon 10, thereby ensuring the reliability of the flattening effect.

[0056] In this embodiment, a second groove 22 matching the outer surface of the flattening rod 16 is provided between the two positioning parts 19, which is also beneficial for the flattening rod 16 not to separate from the supporting part 18 when subjected to the friction caused by the movement of the carbon ribbon 10, thereby ensuring the reliability of the flattening effect.

[0057] In this embodiment, the flattening rod 16 and the base 26 are limitedly matched along the first direction 27 , which helps to keep the carbon ribbon 10 moving along a direction perpendicular to the first direction 27 and is not prone to deflection.

[0058] In this embodiment, since the end of the flattening rod 16 is very easy to process a step portion, it is easy to process the step surface and the positioning portion 19 to abut against each other to achieve a limited fit along the first direction 27 .

[0059] In this embodiment, by designing the flattening rod 16 to have at least a surface made of metal and always grounded, static electricity on the carbon ribbon 10 can be removed.

[0060] In this embodiment, an elastic member 25 is provided to elastically abut against the outer surface of the flattening rod 16 , and the elastic member 25 is then grounded, so that the flattening rod 16 that may rotate can be effectively kept grounded.

[0061] Example 2

[0062] See also Figure 9 The only difference between Example 2 and Example 1 is that the positioning holes 20 in this embodiment are blind holes, and the two positioning holes 20 in the same positioning unit 17 open opposite each other along the first direction 27. With this structure, position-limiting engagement along the first direction 27 can be achieved without machining the flattening rod 16. All other aspects of Example 2 are identical to Example 1.

[0063] Example 3

[0064] The only difference between the third embodiment and the first embodiment is that the third embodiment has only one flattening rod 16 and only one positioning unit 17 , wherein the flattening rod 16 and the positioning unit 17 are both located only between the ribbon release shaft 8 and the printing mechanism 15 .

[0065] Example 4

[0066] The only difference between the fourth embodiment and the first embodiment is that the fourth embodiment has only one flattening rod 16 and only one positioning unit 17 , wherein the flattening rod 16 and the positioning unit 17 are only located between the printing mechanism 15 and the carbon ribbon reel 9 .

[0067] The anti-wrinkle effect of the third and fourth embodiments is not as good as that of the first embodiment, but they can further save costs. Those skilled in the art can choose as needed.

[0068] It should be emphasized that the ribbon flattening structure disclosed in the present application is not limited to being provided on the ribbon printer 1, and the structure can also be provided on the ribbon holder 7. In this case, the frame of the ribbon holder 7 is equivalent to the main body 4 in the first embodiment, and can serve as the base 26 of the ribbon flattening structure. In other cases, the positioning unit 17 can even be split, and its holding portion 18 and positioning portion 19 can be respectively provided on the frame of the ribbon holder 7 and the main body 4 of the first part 2 of the ribbon printer 1. Since there is no relative movement between the ribbon holder 7 and the main body 4 when the ribbon printer 1 is working, the two can be regarded as one body, which can also prevent the ribbon 10 from wrinkling during movement, thereby improving printing quality.

[0069] Based on the above understanding, those skilled in the art can easily realize that the main body 4 in the first embodiment can be regarded as a base 26, whose main function is to carry the positioning unit 17 and serve as a relative reference for the carbon ribbon release shaft 8 and the carbon ribbon take-up shaft 9 to rotate around the rotation axis extending along the first direction 27. Similarly, the base 26 can be integrated or split. Therefore, the essence of the technical contribution of the present application is to propose a new carbon ribbon flattening structure. The structure is used to flatten the carbon ribbon 10 that moves from the carbon ribbon release shaft 8 to the carbon ribbon take-up shaft 9 through the printing mechanism 15; the structure includes a base 26 and at least one flattening rod 16; each flattening rod 16 is arranged between the carbon ribbon release shaft 8 and the printing mechanism 15 and / or between the printing mechanism 15 and the carbon ribbon take-up shaft 9; the base 26 is configured to be suitable for the carbon ribbon release shaft 8 and the carbon ribbon take-up shaft 9 to rotate relative to it and the respective rotation axes extend along the first direction 27; the base 26 is also provided with an equal number of flattening rods 16 and a one-to-one correspondence. Positioning unit 17; the positioning unit 17 includes a supporting portion 18 and two positioning portions 19; the positioning portions 19 are arranged along a first direction 27 and are each provided with a positioning hole 20 that cooperates with the end of the flattening rod 16, and the projections of the two positioning holes 20 on the projection plane perpendicular to the first direction 27 coincide; the supporting portion 18 extends along a second direction 28 perpendicular to the first direction 27 and the movement direction 29 of the carbon ribbon and supports the middle part of the flattening rod 16 to bend the flattening rod 16 so that the carbon ribbon 10 is flattened by the flattening rod 16 when passing through the outer surface of the flattening rod 16.

[0070] The above description of the specification and embodiments is used to explain the scope of protection of the present application, but does not constitute a limitation on the scope of protection of the present application.

Claims

1. A carbon ribbon flattening structure for flattening a carbon ribbon (10) that moves from a carbon ribbon release shaft (8) through a printing mechanism (15) to a carbon ribbon take-up shaft (9); Its characteristics are: It comprises a base (26) and at least one flattening rod (16); Each of the flattening rods (16) is arranged between the carbon ribbon releasing shaft (8) and the printing mechanism (15) and / or between the printing mechanism (15) and the carbon ribbon winding shaft (9); The base (26) is configured to allow the carbon ribbon release shaft (8) and the carbon ribbon take-up shaft (9) to rotate relative to the base (26) around a rotation axis extending along a first direction (27); the base (26) is also provided with positioning units (17) equal in number to and corresponding to the flattening rods (16); the positioning units (17) include a supporting portion (18) and two positioning portions (19); the two positioning portions (19) are arranged along the first direction (27) and are both provided with positioning holes (20) that cooperate with the ends of the flattening rods (16), and the projections of the two positioning holes (20) on the projection plane perpendicular to the first direction (27) coincide; the supporting portion (18) supports the middle part of the flattening rod (16) along a second direction (28) perpendicular to the first direction (27) to bend the flattening rod (16) so that the carbon ribbon (10) is flattened by the flattening rod (16) when passing through the outer surface of the flattening rod (16).

2. A carbon ribbon flattening structure according to claim 1, characterized in that: The flattening rod (16) has a circular cross-section perpendicular to the first direction (27).

3. A carbon ribbon flattening structure as claimed in claim 2, characterized in that: A first groove (21) for seating the flattening rod (16) is provided on the surface of the supporting portion (18) supporting the flattening rod (16).

4. A carbon ribbon flattening structure as claimed in claim 3, characterized in that: The base (26) is provided with a second groove (22) between the two positioning portions (19), extending along the first direction (27) and matching the outer edge surface of the flattening rod (16); the supporting portion (18) is extended from the bottom of the second groove (22).

5. The carbon ribbon flattening structure according to claim 4, wherein: The flattening rod (16) and the base (26) are position-limited and matched along a first direction (27).

6. A carbon ribbon flattening structure as claimed in claim 5, characterized in that: The flattening rod (16) comprises a rod body and step portions arranged at both ends of the rod body, a step surface is formed between the rod body and the step portion; the step portion cooperates with the positioning hole (20), and the step surface is suitable for abutting against the positioning portion (19).

7. The carbon ribbon flattening structure according to claim 5, wherein: The two positioning holes (20) are both blind holes, and their openings are opposite to each other along the first direction (27).

8. A carbon ribbon printer (1), comprising a first part (2) and a second part (3) connected to each other, wherein the first part (2) is provided with a body (4), the body (4) is provided with a receiving chamber (5), the receiving chamber (5) is suitable for receiving a carbon ribbon assembly (6), the carbon ribbon assembly (6) comprises a carbon ribbon holder (7), a carbon ribbon release shaft (8), a carbon ribbon take-up shaft (9) and a carbon ribbon (10); the carbon ribbon holder (7) is suitable for being received in the receiving chamber (5) and is provided with two supporting parts (11), the two supporting parts (11) are used to support the carbon ribbon release shaft (8) and the carbon ribbon take-up shaft (9) respectively, and allow the carbon ribbon to be received. The carbon ribbon release shaft (8) and the carbon ribbon take-up shaft (9) rotate relative to the carbon ribbon support (7) around a rotation axis extending along a first direction (27), a printing area (12) is formed between the two supporting parts (11), and the carbon ribbon (10) is wound around the carbon ribbon release shaft (8) and the carbon ribbon take-up shaft (9); one of the first part (2) and the second part (3) is provided with a print head (13), and the other of the two is provided with a drive roller (14); the print head (13) and the drive roller (14) cooperate to form a printing mechanism (15); the printing mechanism (15) works in the printing area (12); and the printing mechanism (15) is characterized in that, The first portion (2) is provided with a carbon ribbon flattening structure according to any one of claims 1 to 7, and the body (4) forms the base (26).

9. A ribbon printer (1) as claimed in claim 8, characterized in that: At least the surface of the flattening rod (16) is made of metal and its surface is grounded.

10. A carbon ribbon printer (1) as claimed in claim 9, characterized in that: The first part (2) or the second part (3) is provided with an elastic member (25), and the elastic member (25) is configured to elastically abut against the outer surface of the flattening rod (16) when the ribbon printer (1) is working, and the elastic member (25) is also electrically connected to the ground terminal of the internal circuit of the ribbon printer (1).

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