Ribbon cartridge and printer using same

Abstract

The utility model discloses a ribbon cartridge and a printer using the ribbon cartridge. The ribbon cartridge comprises a cartridge body, two shaft cores arranged in the cartridge body and a ribbon, a first turning plate and a second turning plate are arranged at the two ends of the bottom of the cartridge body respectively, the upper ends of the first turning plate and the second turning plate are rotationally connected with the two ends of the bottom of the cartridge body respectively, and the lower ends of the first turning plate and the second turning plate can be oppositely opened and folded. When the lower ends of the first turning plate and the second turning plate are relatively opened, the ribbon is partially opened and is in a use state of the ribbon cartridge, and when the lower ends of the first turning plate and the second turning plate are relatively folded, the ribbon is tightened and is in a non-use state of the ribbon cartridge. By adding the turning plate mechanism, the ribbon cartridge can be unfolded when in use and folded when not in use, so that the overall size of the ribbon cartridge is reduced, and the ribbon cartridge is convenient to store and transport and not easy to damage. When the ribbon cartridge is used, installation positioning points are few, installation operation is convenient, and simplicity, convenience and reliability are achieved. In addition, the arrangement of the turning plate mechanism facilitates subsequent printer optimization, and the adaptability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of thermal transfer printer, especially to a ribbon cartridge for printer and a printer using the same. BACKGROUND

[0002] At present, the ribbons of thermal transfer printers on the market mainly have two installation modes, one is open type, the ribbon winding shaft core and the unwinding shaft core are completely separated, during installation, the unwinding shaft core is installed first, then the ribbon is wound according to the running route of the ribbon in the printer, until the winding shaft position, the ribbon is fixed on the winding shaft core at the winding shaft position, and finally the ribbon is tightened by rotating the winding shaft core; the other is to use a ribbon cartridge, the winding shaft core and the unwinding shaft core are installed in a ribbon cartridge, but the size of the ribbon cartridge covers the running route of the ribbon in the printer, and the volume of the ribbon cartridge is large. Although the winding shaft core and the unwinding shaft core can be installed at the same time, the operation convenience for the user is not high, and attention should be paid to the avoidance of each position on the printer. At the same time, due to the large volume of the ribbon cartridge, both hands are needed to install the ribbon cartridge in the printer, and more positioning points are needed, which increases the processing precision requirements of the printer equipment and the ribbon cartridge, and attention should be paid to the position accuracy of each positioning point during installation.

[0003] At the same time, due to the large coverage area of the existing ribbon cartridge, the subsequent optimization of the printer is limited, that is, the printer needs to be optimized at the same time, and the ribbon cartridge needs to be optimized synchronously, which increases the optimization time and optimization difficulty.

[0004] In order to solve the deficiency of the existing ribbon cartridge on the market, the present application creates a new ribbon cartridge and a printer using the same, which reduces the volume of the overall cartridge body by increasing the flap mechanism, reduces the transportation cost, facilitates the user to store, and at the same time, the structure is simple, which facilitates the user to install and operate during use, reduces the processing precision of the ribbon cartridge itself, and becomes the target of the current industry which needs to be improved. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a ribbon cartridge, which reduces the volume of the overall cartridge body by increasing the flap mechanism, reduces the transportation cost, facilitates the user to store, and at the same time, the structure is simple, which facilitates the user to install and operate during use, reduces the processing precision of the ribbon cartridge itself, and overcomes the deficiency of the existing ribbon cartridge.

[0006] The utility model provides a ribbon cartridge for solving above -mentioned technical problem, including the box body and setting two axle cores in the box body inside, and be used for winding on two the ribbon of axle core, two axle cores parallel setting in the center both sides of box body, the bottom both ends of box body are equipped with first flap and second flap respectively, the upper end of first flap and second flap is rotatoryly connected with the bottom both ends of box body respectively, the lower end of first flap and second flap can be opposite open and opposite gather, one end of ribbon is fixed on an axle core, the other end is from the lateral part of box body and then passes through the outside of first flap and second flap and then enters the box body from the other lateral part of box body, and is fixed and is wound on another axle core, when the lower end of first flap and second flap is opposite open, the ribbon is partially opened, is in ribbon cartridge use state, when the lower end of first flap and second flap is opposite gather, the ribbon is gathered, is in ribbon cartridge non - use state.

[0007] Further improvement, the lower end of first flap and second flap is equipped with the back bending mechanism, the center area of back bending part of back bending mechanism is cut, the free end of back bending mechanism is equipped with the lower rotating shaft that contacts with ribbon;

[0008] The upper end of first flap and second flap is equipped with upper rotating shaft respectively at the junction of box body bottom, at least one end of upper rotating shaft is equipped with rotating piece, and the rotating piece is equipped with limiting protrusion, and the limiting protrusion is matched with different limiting grooves of box body bottom, realizes the limiting fixing of first flap and second flap opening or gathering state.

[0009] Further improvement, when first flap and second flap are opposite gather, there is an overlapping part, one of the flaps is equipped with an avoidance hole for the back bending mechanism of the other flap to extend into.

[0010] Further improvement, the box body includes a front cover and a rear cover, the front cover and the rear cover are respectively provided with two circular holes for mounting the shaft core, at least two inner extension elastic arms are arranged on the annular periphery of each circular hole, and the two ends of the shaft core are respectively provided with damping sheets, the two damping sheets are in contact with the corresponding inner extension elastic arms, and the damping effect of the shaft core rotation is achieved.

[0011] Further improvement, three inner extension elastic arms are evenly distributed on the annular periphery of each circular hole.

[0012] Further improvement, the shaft core adopts a hollow shaft, the inside of the hollow shaft is provided with a convex rib, which is used for corresponding clamping with the convex rib on the printer take-up and pay-off shaft to drive the shaft core to rotate, thereby realizing the pay-off and take-up actions of the ribbon in the printing process.

[0013] Further improvement, the first ratchet tooth comprises 5 teeth, and both ends of the shaft core are provided with the second ratchet tooth.

[0014] Further improvement, the first ratchet tooth comprises 5 teeth, and both ends of the shaft core are provided with the second ratchet tooth.

[0015] Further improvement, the first ratchet tooth comprises 5 teeth, and both ends of the shaft core are provided with the second ratchet tooth.

[0016] As another improvement of the utility model, the utility model also provides a printer applying the ribbon cartridge, the mounting vertical plate of the printer is equipped with a winding shaft, a paying-off shaft, a first flap guide shaft, a second flap guide shaft and two carbon ribbon transition shafts, the winding shaft and the paying-off shaft correspond to the two shaft cores of the ribbon cartridge respectively; the first flap guide shaft and the second flap guide shaft are respectively arranged below the outer side of the winding shaft and the paying-off shaft, are used for gradually pushing the first flap and the second flap inward when the ribbon cartridge is inserted into the printer, so that the ribbon is separated from the first flap and the second flap; the two carbon ribbon transition shafts are respectively arranged below the first flap guide shaft and the second flap guide shaft, are used for supporting the ribbon when the first flap guide shaft and the second flap guide shaft push the first flap and the second flap inward, so as to avoid the influence of the flap mechanism on the ribbon in the printing process of the printer.

[0017] After adopting the design, the utility model has at least the following advantages:

[0018] 1. The ribbon cartridge can be opened during use and folded and stored when not used by increasing the flap mechanism, the overall size of the ribbon cartridge is reduced, the ribbon cartridge is convenient to store and transport in the stored state, is not easy to be damaged, and the storage and transportation costs are reduced. Meanwhile, the ribbon cartridge has few mounting points in the use state, is convenient for user to mount and operate, and is simple and reliable. Meanwhile, the flap mechanism is only used for supporting the ribbon during installation of the ribbon cartridge, the flap mechanism is separated from the ribbon surface after the ribbon cartridge is installed on the printer, and the ribbon supporting shaft becomes the shaft of the printer itself, so that the parallelism of the ribbon during the printing process of the printer is ensured, and the machining precision of the ribbon cartridge itself is reduced.

[0019] In addition, the flap mechanism is independently arranged, when the subsequent printer is optimized and improved, the main cartridge body part of the ribbon cartridge does not need to be improved and optimized, only the flap mechanism needs to be optimized and designed, so that the ribbon demand of various printers can be met, the improvement is simple, and the adaptability is strong.

[0020] 2. The color ribbon cartridge of the present application can also play a damping role during the rotation of the shaft core, preventing the color ribbon from being unwound, by setting damping sheets on both ends of the shaft core and setting inner extension spring arms in contact with the damping sheets on the front and rear cover bodies.

[0021] 3. The color ribbon cartridge can also be prevented from being reused, affecting the printing effect, by setting the first and second ratchet teeth and the clamping spring arms, so that the clamping spring arms act on the shaft core when the color ribbon cartridge is not installed on the printer, the first and second ratchet teeth are engaged, the shaft core can only rotate clockwise inside the circular hole and cannot rotate counterclockwise.

[0022] 4. The color ribbon cartridge can also be positioned and inserted more easily, and the shaft core can not contact the cartridge body during the winding and unwinding of the color ribbon, reducing the influence of the cartridge body on the winding and unwinding of the color ribbon, by setting a positioning groove on the rear cover body, which cooperates with the positioning shaft on the printer.

[0023] 5. The printer of the present application can effectively avoid the influence of the flap mechanism on the color ribbon during the printing process of the printer, reduce the interference factors of printing, and improve the printing quality, by setting the flap guide shaft and the carbon ribbon transition shaft on the installation stand plate of the printer, so that the color ribbon is separated from the flap mechanism when the color ribbon cartridge is applied to the printer, and cooperates with the carbon ribbon transition shaft of the printer itself. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0025] Figure 1 is a structure front view of the color ribbon cartridge in the retracted state of the present embodiment.

[0026] Figure 2 is a structure perspective view of the color ribbon cartridge in the retracted state of the present embodiment.

[0027] Figure 3 is a structure front view of the color ribbon cartridge in the expanded state of the present embodiment.

[0028] Figure 4 is a structure perspective view of the color ribbon cartridge in the expanded state of the present embodiment.

[0029] Figure 5 is a structure front view of the color ribbon cartridge in the expanded state of the present embodiment.

[0030] Figure 6 is a structure front view of the color ribbon cartridge in the expanded state of the present embodiment.

[0031] Figure 7Fig. 6 is a schematic view of the outer side structure of the rear cover of the ink cartridge of the present embodiment.

[0032] Figure 8 Fig. 7 is a schematic view of the inner side structure of the rear cover of the ink cartridge of the present embodiment.

[0033] Figure 9 Fig. 8 is a schematic view of the left flap of the ink cartridge of the present embodiment.

[0034] Figure 10 Fig. 9 is a schematic view of the right flap of the ink cartridge of the present embodiment.

[0035] Figure 11 Fig. 10 is a schematic view of the shaft core of the ink cartridge of the present embodiment.

[0036] Figure 12 Fig. 11 is a schematic view of the damping sheet installed on both ends of the shaft core of the ink cartridge of the present embodiment.

[0037] Figure 13 Fig. 12 is a schematic view of the partial structure of the ink cartridge of the present embodiment installed on the printer. DETAILED DESCRIPTION

[0038] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0039] Referring to the drawings, Figures 1 to 4 the ink cartridge of the present embodiment includes a cartridge body 1, two shaft cores 2 arranged inside the cartridge body 1, and an ink ribbon 3 wound around the two shaft cores 2. The two shaft cores 2 are arranged in parallel on both sides of the center of the cartridge body 1.

[0040] The cartridge body 1 of the present embodiment includes a front cover 11 and a rear cover 12. Two circular holes for installing the shaft cores 2 are respectively arranged on the front cover 11 and the rear cover 12, as shown in Fig. 2. Figures 5 to 8

[0041] ​Specifically, the front cover 11 is a plastic shell structure with two large circular holes 111 on its flat surface, symmetrically located on either side of the center of the shell. The shell's vertical surfaces are not fully enclosed, consisting of only upper and lower surfaces. Each of the upper and lower surfaces of the front cover 11 includes mounting positioning posts and hook mounting grooves. The rear cover 12 also uses a plastic shell structure, with two large circular holes 121 on its flat surface, corresponding to the two large circular holes 111 on the front cover 11, used to mount two shaft cores 2. The rear cover 12's vertical surfaces are also not fully enclosed, consisting of only upper and lower surfaces. Each of the upper and lower surfaces of the rear cover 12 includes mounting positioning holes and hooks corresponding to those on the front cover 11, achieving a fixed connection between the front cover 11 and the rear cover 12, forming a box 1 with hollow sides.

[0042] Please refer to the appendix. Figures 1-4 As shown in Figures 9 and 10, the bottom of the box 1 in this embodiment is provided with a first flap and a second flap, namely a left flap 4 and a right flap 5. The upper ends of the left flap 4 and the right flap 5 are rotatably connected to the bottom ends of the box 1. The lower ends of the left flap 4 and the right flap 5 can be opened and closed relative to each other. In this embodiment, the total length of the ribbon 3 is 450 meters, but it is not limited to this length. One end of the ribbon 3 is fixed to a shaft core 2, and the other end extends from the side of the box body, passes through the outside of the left flap 4 and the right flap 5, and then enters the box body 1 from the other side of the box body, where it is fixedly wound around another shaft core 2. When the lower ends of the left flap 4 and the right flap 5 are opened relative to each other, the ribbon 3 is partially spread out and is in the ribbon box usage state. When the lower ends of the left flap 4 and the right flap 5 are closed relative to each other, the ribbon 3 is tightened and is in the ribbon box non-use state.

[0043] Specifically, an upper rotating shaft 41 is provided at the connection between the upper end of the left flap 4 and the bottom left side of the box body. Mounting plates 10 extend downwards from the lower left side of both the front cover 11 and the rear cover 12. The mounting plates 10 have through holes 101 for mounting the upper rotating shaft 41. The mounting plates 10 also have a retractable limiting groove 102 and an unfolded limiting groove 103. At least one end of the upper rotating shaft 41 has a rotating member 42, and the rotating member 42 has a limiting protrusion 43. When the limiting protrusion 43 matches the retractable limiting groove 102 on the mounting plate 10, it achieves the limiting fixation of the left flap 4 in the retracted state. When the limiting protrusion 43 matches the unfolded limiting groove 103 on the mounting plate 10, it achieves the limiting fixation of the left flap 4 in the unfolded state.

[0044] An upper rotating shaft 51 is provided at the connection between the upper end of the right flip plate 5 and the bottom right side of the box body. Mounting plates 20 extend downwards from the lower right sides of both the front cover 11 and the rear cover 12. The mounting plates 20 have through holes 201 for mounting the upper rotating shaft 51. The mounting plates 20 also have a retractable limiting groove 202 and an unfolded limiting groove 203. At least one end of the upper rotating shaft 51 has a rotating component 52, and the rotating component 52 has a limiting protrusion 53. When the limiting protrusion 53 matches the retractable limiting groove 202 on the mounting plate 20, it achieves the limiting fixation of the right flip plate 5 in the retracted state. When the limiting protrusion 53 matches the unfolded limiting groove 203 on the mounting plate 20, it achieves the limiting fixation of the right flip plate 5 in the unfolded state.

[0045] In this embodiment, both the left flap 4 and the right flap 5 are equipped with inward bending mechanisms at their lower ends. The central area of ​​the bending portion of the bending mechanism is cut off, resulting in a hollow state. The free ends of the bending mechanism are equipped with lower rotating shafts 44 and 54 that contact the ribbon 3. Thus, the two sides of the bending mechanism form left and right limits on the ribbon 3, preventing the ribbon from deviating.

[0046] In this embodiment, the left flap 4 and the right flap 5 overlap when retracted. Therefore, the right flap 5 is provided with a clearance hole 55 for the bending mechanism of the left flap 4 to extend into. Thus, the unfolding and retracting steps of the left flap 4 and the right flap 5 are sequential. For example, when unfolding, the left flap 4 is opened first, and then the right flap 5 is opened. When retracting, the right flap 5 is retracted first, and then the left flap 4 is retracted.

[0047] In a further improvement, in this embodiment, each large circular hole on the front cover 11 and the rear cover 12 is provided with three evenly distributed inwardly extending spring arms 7 on its annular periphery, as shown in the attached figure. Figure 6 and 8 As shown in the attached diagram. Damping plates 6 are respectively provided at both ends of the shaft core 2. Figure 4 and 12 As shown. The outer surfaces of the damping plates 6 are all in contact with the corresponding inner extension arms 7, which dampen the rotation of the shaft core 2 and prevent the ribbon from unwinding.

[0048] Please refer to the appendix. Figure 11 As shown, in this embodiment, the shaft core 2 is a hollow shaft, and the hollow shaft has a protruding rib 21 inside, which is used to engage with the protruding ridge on the printer's unwinding and rewinding shaft to drive the rotation of the shaft core 2, thereby realizing the unwinding and rewinding of the ribbon during the printing process.

[0049] To further prevent the shaft from reversing, this embodiment provides a first ratchet tooth 122 on the lower arc surface of the circular hole 121 of the rear cover 12, as shown in the attached figure. Figure 7 and 8The first ratchet tooth 122 in this embodiment comprises 3 or more teeth, preferably 5. The circular hole upper end arc surface of the rear cover body 12 is provided with a clamping position elastic arm 123 extending to the center of the circular hole. The end of the shaft core 2 is provided with a ring of second ratchet teeth 22 engaging with the first ratchet teeth 122. The second ratchet teeth 22 can engage with the first ratchet teeth 122 under the action of the clamping position elastic arm 123, preventing the shaft core from reversing.

[0050] Also, the middle position of the shell plane outer side of the rear cover body 12 in this embodiment is also provided with two positioning holes 124, as shown in the attached Figure 7 , used as the installation positioning hole of the ink ribbon cartridge and the printer. The shell plane outer side of the front cover body 11 is provided with a buckle slot 112, as shown in the attached Figure 5 , facilitating the taking and placing action of the ink ribbon cartridge on the printer.

[0051] In addition, referring to the attached Figure 2 and 4 , the upper part of the cartridge body 1 in this embodiment is also provided with an anti-counterfeiting plate 13 for the authenticity inspection of the ink ribbon cartridge. When the ink ribbon cartridge is installed on the printer, it is used for the authenticity inspection of the ink ribbon cartridge.

[0052] The left and right flaps 4 and 5 of the ink ribbon cartridge in this embodiment are retracted during transportation and storage, and the ink ribbon 3 is tightened outside the left and right flaps 4 and 5. In this state, the ink ribbon cartridge cannot be installed on the thermal transfer printer, as shown in the attached Figure 1 and 2 . Before using the ink ribbon cartridge, first rotate and position the left flap 4 of the ink ribbon cartridge, and then rotate and position the right flap 5 of the ink ribbon cartridge. During the opening of the left and right flaps 4 and 5, the ink ribbon 3 is pulled out along with the opening of the flaps, driving the shaft core 2 to rotate, and the ink ribbon 3 is also pulled out, finally forming the unfolded state of the ink ribbon cartridge, as shown in the attached Figure 3 and 4 .

[0053] This embodiment also discloses a printer applying the above ink ribbon cartridge. Referring to the attached Figure 13As shown, the mounting vertical plate 100 of the printer is provided with a winding shaft 1001, a unwinding shaft 1002, a left flap guide shaft 1003, a right flap guide shaft 1004, a left carbon ribbon transition shaft 1005 and a right carbon ribbon transition shaft 1006. The winding shaft 1001 and the unwinding shaft 1002 correspond to the two shaft cores 2 of the ribbon cartridge respectively; the left flap guide shaft 1003 and the right flap guide shaft 1004 are respectively arranged below the outer side of the winding shaft 1001 and the unwinding shaft 1002, and are used to gradually push the left flap 4 and the right flap 5 inward when the ribbon cartridge is mounted and inserted into the printer, so that the ribbon 3 is separated from the left flap 4 and the right flap 5; the left carbon ribbon transition shaft 1005 and the right carbon ribbon transition shaft 1006 are respectively arranged below the left flap guide shaft 1003 and the right flap guide shaft 1004, and are used to support the ribbon 3 when the left flap guide shaft 1003 and the right flap guide shaft 1004 push the left flap 4 and the right flap 5 inward, so as to avoid the influence of the flap mechanism on the ribbon during the printing process of the printer.

[0054] The mounting vertical plate 100 of the printer is further provided with a mounting positioning shaft 1007, which is used to correspond to the positioning hole 124 on the ribbon cartridge, and plays a positioning role when the ribbon cartridge is mounted.

[0055] In actual use, first, the two shaft cores 2 are aligned with the winding shaft 1001 and the unwinding shaft 1002 of the printer, and are inserted into the ribbon cartridge. During the entire insertion process, the shaft core 2 of the ribbon cartridge travels along the winding and unwinding shafts; when the insertion reaches 1 / 3 of the position, the mounting positioning shaft 1007 on the printer contacts the mounting positioning hole 124 on the rear cover body 12 of the ribbon cartridge, and the positioning insertion of the ribbon cartridge begins. At this time, the front cover body 11 and the rear cover body 12 of the ribbon cartridge are positioned by the mounting positioning shaft 1007 of the printer, and the shaft core 2 is positioned according to the winding and unwinding shafts. In this way, the shaft core 2 does not contact the outer shell body during the winding and unwinding process of the ribbon, and the influence of the outer shell body on the winding and unwinding of the ribbon is reduced. When the ribbon cartridge continues to be inserted to 1 / 2 of the position, the left flap guide shaft 1003 and the right flap guide shaft 1004 on the printer device begin to gradually push the left flap 4 and the right flap 5 inward, until the ribbon cartridge is completely pushed to the bottom, and the left flap 4 and the right flap 5 of the ribbon cartridge are retracted inward by a certain distance. At this time, the ribbon 3 contacts the left carbon ribbon transition shaft 1005 and the right carbon ribbon transition shaft 1006 on the printer device, and the ribbon 3 is separated from the left flap 4 and the right flap 5 of the ribbon cartridge. In this way, the running of the ribbon 3 during the entire printing process relies on the carbon ribbon transition shaft on the printer device, avoiding the influence of the structure strength of the flap itself on the running of the ribbon 3, and reducing the interference factors. After the printing is completed, the ribbon cartridge is taken out, the right flap 5 and the left flap 4 are closed in turn, and then the ribbon 3 is manually tightened to the ribbon tensioning.

[0056] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Those skilled in the art can make some simple modifications, equivalent changes or modifications to the disclosed technical contents, and all fall within the protection scope of the present application.

Claims

1. A ribbon cartridge, comprising a cartridge body and two spindles disposed inside the cartridge body, and a ribbon for winding around the two spindles, wherein the two spindles are arranged parallel to each other on both sides of the center of the cartridge body, characterized in that, The bottom of the box is provided with a first flap and a second flap, respectively. The upper ends of the first flap and the second flap are rotatably connected to the bottom of the box. The lower ends of the first flap and the second flap can be opened and closed relative to each other. One end of the ribbon is fixed on a shaft, and the other end extends from the side of the box, passes through the outside of the first flap and the second flap, and then enters the box from the other side of the box, where it is fixedly wound around another shaft. When the lower ends of the first flap and the second flap are opened relative to each other, the ribbon is partially spread out and is in the ribbon box in use state. When the lower ends of the first flap and the second flap are closed relative to each other, the ribbon is tightened and is in the ribbon box in non-use state.

2. The ribbon cartridge according to claim 1, characterized in that, The lower ends of the first and second flaps are provided with a return bending mechanism. The central area of ​​the return bending part of the return bending mechanism is cut off, and the free end of the return bending mechanism is provided with a lower rotating shaft that contacts the ribbon. The upper ends of the first and second flaps are respectively provided with upper rotating shafts at the connection between the upper ends and the bottom of the box body. At least one end of the upper rotating shaft is provided with a rotating component, and the rotating component is provided with a limiting protrusion. The limiting protrusion matches different limiting grooves on the bottom of the box body to achieve limiting and fixing of the first and second flaps in the open or closed state.

3. The ribbon cartridge according to claim 2, characterized in that, When the first flap and the second flap are retracted relative to each other, there is an overlapping part. One of the flaps is provided with a clearance hole for the bending mechanism of the other flap to extend into.

4. The ribbon cartridge according to any one of claims 1 to 3, characterized in that, The box body includes a front cover and a rear cover. The front cover and the rear cover are each provided with two circular holes for installing the shaft core. Each circular hole has at least two inner extension arms on its annular periphery. The two ends of the shaft core are respectively provided with damping plates. Both damping plates are in contact with the corresponding inner extension arms, which play a damping role when the shaft core rotates.

5. The ribbon cartridge according to claim 4, characterized in that, Each of the circular holes has three evenly distributed inner extension arms on its annular periphery.

6. The ribbon cassette according to claim 4, characterized in that, The shaft core is a hollow shaft with protruding ribs inside, which are used to engage with the protruding ridges on the printer's unwinding and rewinding shafts to drive the shaft core to rotate, thereby realizing the unwinding and rewinding of the ribbon during the printing process.

7. The ribbon cartridge according to claim 4, characterized in that, The lower arc surface of the circular hole of the rear cover is provided with a first ratchet tooth, and the upper arc surface of the circular hole of the rear cover is provided with a locking spring arm extending toward the center of the circular hole. At least one end of the shaft is provided with a second ratchet tooth that meshes with the first ratchet tooth. Under the action of the locking spring arm, the second ratchet tooth can mesh with the first ratchet tooth to prevent the shaft from reversing.

8. The ribbon cartridge according to claim 7, characterized in that, The first ratchet tooth includes 5 teeth, and the second ratchet tooth is provided at both ends of the shaft.

9. The ribbon cassette according to claim 4, characterized in that, The rear cover has a ribbon box positioning groove, the front cover has a handle groove, and the upper part of the box is also provided with an anti-counterfeiting plate for verifying the authenticity of the ribbon box.

10. A printer using a ribbon cartridge according to any one of claims 1 to 9, characterized in that, The printer's mounting plate is equipped with a take-up shaft, an unwind shaft, a first flap guide shaft, a second flap guide shaft, and two ribbon transition shafts. The take-up shaft and the unwind shaft correspond to the two shaft cores of the ribbon cartridge, respectively. The first flap guide shaft and the second flap guide shaft are respectively located below and outside the take-up shaft and the unwind shaft. They are used to gradually push the first flap and the second flap inward when the ribbon cartridge is inserted into the printer, so that the ribbon disengages from the first flap and the second flap. The two ribbon transition shafts are respectively located below the first flap guide shaft and the second flap guide shaft. They are used to support the ribbon when the first flap and the second flap are pushed inward by the first flap guide shaft and the second flap guide shaft.

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