Ribbon cartridge and printer using same
By introducing a flip mechanism into the ribbon box, the existing ribbon box has been solved, and the volume reduction of the ribbon box and the simplification of user operations has been achieved, which meets the printer's optimization needs.
Patent Information
- Application Number
- CN202510568782.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2025-06-06
AI Technical Summary
The existing thermal transfer printers have large ribbon boxes, which are inconvenient to operate, which increases the requirements for equipment and processing accuracy, and also limits the optimization of the printer.
A ribbon box with a flip mechanism is designed. Through the use and retraction of the flip mechanism, the overall size of the ribbon box is reduced, the user's installation operation is simplified, and the processing accuracy requirements of the ribbon box are reduced.
The volume reduction of the ribbon box is achieved, the transportation and storage costs are reduced, the user's operation is simplified, the equipment's processing accuracy requirements are reduced, and the printer's optimization needs are adapted.
Smart Images
Figure CN120096217A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of thermal transfer printers, in particular to a ribbon box for a printer and a printer using the ribbon box. Background Art
[0002] At present, there are two main ways to install the ribbon of thermal transfer printers on the market. One is open, and the ribbon take-up shaft core and unwinding shaft core are completely separated. When installing, first install the unwinding shaft core, and then wind the ribbon into it according to the route of the ribbon in the printer until it reaches the take-up shaft position, and then fix the ribbon on the take-up shaft core at the take-up shaft position, and finally rotate the take-up shaft core to tighten the ribbon; the other is to use a ribbon cassette, and the take-up shaft core and unwinding shaft core are installed in a ribbon cassette, but the size of the ribbon cassette must cover the route of the ribbon in the printer, and the volume of the ribbon cassette is large. Although the take-up shaft core and unwinding shaft core can be installed at the same time, the user's operation is not very convenient, and it is necessary to pay attention to the avoidance of various positions on the printer. At the same time, due to the large volume of the ribbon cassette, it requires two hands to operate to install the ribbon cassette in the printer, and more positioning points are required, which increases the processing accuracy requirements of the printer equipment and the ribbon cassette. When installing, it is also necessary to pay attention to the accurate position of each positioning point.
[0003] At the same time, the existing ribbon cassette has a large coverage area, which limits the subsequent optimization of the printer. That is, when optimizing the printer, the ribbon cassette needs to be optimized simultaneously, which increases the optimization time and difficulty.
[0004] In order to solve the shortcomings of existing ribbon cassettes on the market, the present application creates a new ribbon cassette and a printer using the ribbon cassette, which reduces the volume of the overall cassette by adding a flip mechanism, reduces transportation costs, and facilitates storage for users. At the same time, the structure is simple, which facilitates the user's installation operation during use and reduces the processing accuracy of the ribbon cassette itself, which has become a goal that the industry urgently needs to improve. Summary of the invention
[0005] The technical problem to be solved by the present invention is to provide a ribbon box, which reduces the volume of the overall box body by adding a flip mechanism, reduces transportation costs, and is convenient for users to store. At the same time, the structure is simple, which facilitates the user's installation operation during use and reduces the processing accuracy of the ribbon box itself, thereby overcoming the shortcomings of existing ribbon boxes.
[0006] In order to solve the above technical problems, the present invention provides a ribbon box, comprising a box body and two shaft cores arranged inside the box body, and a ribbon used to be wound around the two shaft cores, the two shaft cores being arranged in parallel on both sides of the center of the box body, and a first flap and a second flap being respectively provided at two ends of the bottom of the box body, the upper ends of the first flap and the second flap being respectively rotatably connected to the two ends of the bottom of the box body, and the lower ends of the first flap and the second flap being able to be relatively opened and relatively retracted, one end of the ribbon is fixed on one of the shaft cores, and the other end extends out from the side of the box body, passes through the outside of the first flap and the second flap, and then enters the box body from the other side of the box body and is fixedly wound around the other shaft core, when the lower ends of the first flap and the second flap are relatively opened, the ribbon is partially stretched out and is in the use state of the ribbon box, and when the lower ends of the first flap and the second flap are relatively retracted, the ribbon is tightened and is in the non-use state of the ribbon box.
[0007] As a further improvement, a bending mechanism is provided at the lower ends of the first flap and the second flap, a central area of the bending portion of the bending mechanism is cut, and a lower rotating shaft in contact with the ribbon is provided at the free end of the bending mechanism;
[0008] An upper rotating shaft is respectively provided at the connection between the upper ends of the first flap and the second flap and the bottom of the box body, at least one end of the upper rotating shaft is provided with a rotating member, and a limiting protrusion is provided on the rotating member, and the limiting protrusion matches with different limiting grooves at the bottom of the box body to realize the limiting fixation of the first flap and the second flap in the open or retracted state.
[0009] As a further improvement, there is an overlapping portion when the first flap and the second flap are relatively retracted, and one of the flaps is provided with an avoidance hole for the bending mechanism of the other flap to extend into.
[0010] Further improvement, the box body includes a front cover body and a rear cover body, and the front cover body and the rear cover body are respectively provided with two circular holes for installing the shaft core, and at least two inwardly extending elastic arms are provided on the annular periphery of each of the circular holes, and damping plates are respectively provided at both ends of the shaft core, and the two damping plates are in contact with the corresponding inwardly extending elastic arms to play a damping role when the shaft core rotates.
[0011] As a further improvement, three evenly distributed inwardly extending elastic arms are provided on the annular periphery of each circular hole.
[0012] As a further improvement, the shaft core adopts a hollow shaft, and a convex rib is provided inside the hollow shaft for correspondingly engaging with the convex ridges on the printer's reel-up shaft to drive the shaft core to rotate, thereby realizing the unwinding and rewinding action of the ribbon during printing.
[0013] As a further improvement, a first ratchet tooth is provided on the arc surface at the lower end of the circular hole of the rear cover body, a locking spring arm extending toward the center of the circular hole is provided on the arc surface at the upper end of the circular hole of the rear cover body, and a second ratchet tooth meshing with the first ratchet tooth is provided at at least one end of the shaft core, and the second ratchet tooth can mesh with the first ratchet tooth under the action of the locking spring arm to prevent the shaft core from reversing.
[0014] As a further improvement, the first ratchet teeth include 5 teeth, and the second ratchet teeth are provided at both ends of the shaft core.
[0015] As a further improvement, the rear cover body is provided with a ribbon cassette positioning groove, the front cover body is provided with a hand buckle groove, and the upper part of the cassette body is also provided with an anti-counterfeiting plate for authenticity inspection of the ribbon cassette.
[0016] As another improvement of the present invention, the present invention also provides a printer using the above-mentioned ribbon cassette, and a winding shaft, an unwinding shaft, a first flap guide shaft, a second flap guide shaft and two carbon ribbon transition shafts are provided on the mounting plate of the printer, and the winding shaft and the unwinding shaft correspond to the two axis cores of the ribbon cassette respectively; the first flap guide shaft and the second flap guide shaft are respectively arranged at the lower and outer sides of the winding shaft and the unwinding shaft, and are used for gradually pushing the first flap and the second flap inward when the ribbon cassette is inserted into the printer, so that the ribbon detaches from the first flap and the second flap; the two carbon ribbon transition shafts are respectively arranged at the lower sides of the first flap guide shaft and the second flap guide shaft, and 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 during the printing process of the printer.
[0017] After adopting such a design, the present invention has at least the following advantages:
[0018] 1. The ribbon cassette of the present invention can be opened when in use and folded up when not in use by adding a flap mechanism, thereby reducing the overall size of the ribbon cassette, making it convenient to store and transport the folded ribbon cassette, not easy to be damaged, and reducing the storage and transportation costs. At the same time, when the ribbon cassette is in use, there are fewer installation positioning points, which is convenient for users to install and operate, and is simple and reliable. At the same time, the flap mechanism is only used to support the direction of the ribbon when the ribbon cassette is installed. When the ribbon cassette is installed on the printer, the flap mechanism is separated from the ribbon surface, and the ribbon support shaft becomes the axis of the printer device itself, thereby ensuring the parallelism of the ribbon during the printing process of the printer and reducing the processing accuracy of the ribbon cassette itself.
[0019] Also, due to the independent setting of the flip mechanism, when the subsequent printer is optimized and upgraded, there is no need to improve and optimize the main box body of the ribbon box. Only the optimization design of the flip mechanism can meet the ribbon requirements of various printers. The improvement is simple and the adaptability is strong.
[0020] 2. The ribbon cassette of the present invention also provides damping plates at both ends of the shaft core, and provides inwardly extending elastic arms in contact with the front and rear covers, which can play a damping role during the rotation of the shaft core and prevent the ribbon from unwinding.
[0021] 3. By setting the first ratchet teeth and the second ratchet teeth and the locking spring arm, when the ribbon cassette is not installed on the printer, the locking spring arm acts on the shaft core, so that the first ratchet teeth and the second ratchet teeth are engaged, and the shaft core can only rotate clockwise inside the circular hole but not counterclockwise, thereby preventing the used ribbon from being rolled onto the unwinding shaft core, resulting in repeated use and affecting the printing effect.
[0022] 4. A positioning groove is also provided on the rear cover body to cooperate with the positioning shaft on the printer, which is beneficial to the positioning and insertion of the ribbon cassette and can prevent the shaft core from contacting the cassette body during the process of retracting and releasing the ribbon, thereby reducing the influence of the cassette body on the retraction and release of the ribbon.
[0023] 5. The printer of the present invention arranges a flap guide shaft and a carbon ribbon transition shaft on its mounting plate, so that when the ribbon cartridge is applied to the printer, the ribbon is separated from the flap mechanism and cooperates with the carbon ribbon transition shaft of the printer itself, which can effectively avoid the influence of the flap mechanism on the ribbon during the printing process of the printer, reduce interference factors in printing, and improve printing quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0025] Figure 1 It is a front view of the structure of the ribbon cassette in the retracted state of this embodiment.
[0026] Figure 2 It is a structural stereogram of the ink ribbon cassette in the stowed state of this embodiment.
[0027] Figure 3 It is a structural front view of the ribbon cassette in the unfolded state of this embodiment.
[0028] Figure 4 It is a structural stereogram of the ribbon cassette in the unfolded state of this embodiment.
[0029] Figure 5 It is a schematic diagram of the outer side structure of the front cover body in the ribbon box of this embodiment.
[0030] Figure 6 It is a schematic diagram of the inner side structure of the front cover body in the ribbon box of this embodiment.
[0031] Figure 7It is a schematic diagram of the outer side structure of the rear cover body in the ribbon box of this embodiment.
[0032] Figure 8 It is a schematic diagram of the inner side structure of the rear cover body in the ribbon box of this embodiment.
[0033] Fig. 9 It is a schematic structural diagram of the left flap in the ribbon box of this embodiment.
[0034] Fig.10 It is a schematic diagram of the structure of the right flap in the ribbon box of this embodiment.
[0035] Fig.11 It is a schematic diagram of the structure of the shaft core in the ribbon box of this embodiment.
[0036] Fig.12 It is a schematic diagram of the structure of the damping plate installed at both ends of the shaft core in the ribbon box of this embodiment.
[0037] Fig.13 It is a partial structural schematic diagram of the ribbon cassette of this embodiment after being installed in the printer. DETAILED DESCRIPTION
[0038] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.
[0039] See attached Figures 1 to 4 As shown, the ribbon cassette of this embodiment includes a cassette body 1 and two shaft cores 2 arranged inside the cassette body 1, and a ribbon 3 used to be wound around the two shaft cores 2, and the two shaft cores 2 are arranged in parallel on both sides of the center of the cassette body 1.
[0040] The box body 1 of this embodiment includes a front cover 11 and a rear cover 12. The front cover 11 and the rear cover 12 are respectively provided with two circular holes for mounting the shaft core 2. Figures 5 to 8 shown.
[0041] Specifically, the front cover 11 adopts a plastic shell structure, and there are two large circular holes 111 on the shell plane, and the two circular holes 111 are respectively located at symmetrical positions on both sides of the center of the shell plane. The shell facade is an incompletely closed side surface, and only has two upper and lower facade structures. The upper and lower facades of the front cover 11 respectively include installation positioning columns and hook installation grooves. The rear cover 12 also adopts a plastic shell structure, and there are also two large circular holes 121 on the shell plane, which correspond to the positions of the two large circular holes 111 of the front cover 11, and are respectively used to install two shaft cores 2. The shell facade of the rear cover 12 is also an incompletely closed wall, and only has two upper and lower facade structures. The upper and lower facades of the rear cover 12 respectively include installation positioning holes and hooks corresponding to the front cover 11, so as to realize the fixed connection between the front cover 11 and the rear cover 12, and form a box body 1 with hollow sides.
[0042] Please refer to the attached Figure 1-4 As shown in Figures 9 and 10, the first flap and the second flap, i.e., the left flap 4 and the right flap 5, are respectively provided at the two ends of the bottom of the box body 1 in this embodiment. The upper ends of the left flap 4 and the right flap 5 are rotatably connected to the two ends of the bottom of the box body 1 respectively. The lower ends of the left flap 4 and the right flap 5 can be relatively opened and relatively retracted. The total length of the ribbon 3 in this embodiment is 450 meters, but is not limited to this length. One end of the ribbon 3 is fixed on one of the shaft cores 2, and the other end extends from the side of the box body and 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 and is fixedly wound on the other shaft core 2. When the lower ends of the left flap 4 and the right flap 5 are relatively opened, the ribbon 3 is partially stretched and is in the ribbon box use state, and when the lower ends of the left flap 4 and the right flap 5 are relatively retracted, 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 left side of the bottom of the box body. The lower left sides of the front cover body 11 and the rear cover body 12 extend downwardly from the mounting plate 10, and the mounting plate 10 is provided with a through hole 101 for mounting the upper rotating shaft 41. The mounting plate 10 is also provided with a stowed position limiting groove 102 and an extended position limiting groove 103. At least one end of the upper rotating shaft 41 is provided with a rotating member 42, and the rotating member 42 is provided with a limiting protrusion 43. When the limiting protrusion 43 matches the stowed position limiting groove 102 on the mounting plate 10, the stowed state of the left flap 4 is limited and fixed. When the limiting protrusion 43 matches the extended position limiting groove 103 on the mounting plate 10, the extended state of the left flap 4 is limited and fixed.
[0044] An upper rotating shaft 51 is provided at the connection between the upper end of the right flap 5 and the right side of the bottom of the box body. The lower right sides of the front cover body 11 and the rear cover body 12 extend downwardly from the mounting plate 20, and the mounting plate 20 is provided with a through hole 201 for mounting the upper rotating shaft 51. The mounting plate 20 is also provided with a stowed position limiting groove 202 and an extended position limiting groove 203. At least one end of the upper rotating shaft 51 is provided with a rotating member 52, and a limiting protrusion 53 is provided on the rotating member 52. When the limiting protrusion 53 matches the stowed position limiting groove 202 on the mounting plate 20, the stowed state of the right flap 5 is limited and fixed. When the limiting protrusion 53 matches the extended position limiting groove 203 on the mounting plate 20, the extended state of the right flap 5 is limited and fixed.
[0045] In this embodiment, the lower ends of the left flap 4 and the right flap 5 are provided with an inward bending mechanism, and the central area of the bending portion of the bending mechanism is cut and is in a hollow state. The free ends of the bending mechanism are provided with lower rotating shafts 44 and 54 that contact the ribbon 3. The two sides of the bending mechanism form left and right limit positions for the ribbon 3 to prevent the ribbon from running off.
[0046] In this embodiment, the left flap 4 and the right flap 5 overlap when they are relatively retracted, so an avoidance hole 55 is provided on the right flap 5 for the bending mechanism of the left flap 4 to extend into. In this way, the unfolding and retracting steps of the left flap 4 and the right flap 5 are sequential, such as first opening the left flap 4 and then opening the right flap 5 when unfolding, and first retracting the right flap 5 and then retracting the left flap 4 when retracting.
[0047] Further improvement, in this embodiment, three evenly distributed inner extension elastic arms 7 are provided on the annular periphery of each large circular hole on the front cover body 11 and the rear cover body 12, as shown in the attached Figure 6 and 8 The two ends of the shaft core 2 are provided with damping plates 6, as shown in the attached Figure 4 and 12 The outer side surfaces of the damping plates 6 are in contact with the corresponding inner elastic arms 7, which play a damping role when the shaft core 2 rotates, thereby preventing the ribbon from unwinding.
[0048] Please refer to the attached Fig.11 As shown, the shaft core 2 in this embodiment adopts a hollow shaft, and a convex rib 21 is provided inside the hollow shaft for correspondingly engaging with the convex ridges on the printer's reel-up shaft to drive the rotation of the shaft core 2, thereby realizing the unwinding and rewinding action of the ribbon during printing.
[0049] In order to further prevent the shaft core from reversing, in this embodiment, a first ratchet tooth 122 is provided on the arc surface at the lower end of the circular hole 121 of the rear cover body 12. Figure 7 and 8As shown. In this embodiment, the first ratchet teeth 122 include 3 or more teeth, preferably 5. A locking spring arm 123 extending toward the center of the circular hole is provided on the arc surface of the upper end of the circular hole of the rear cover body 12. A circle of second ratchet teeth 22 meshing with the first ratchet teeth 122 is provided at the end of the shaft core 2. The second ratchet teeth 22 can mesh with the first ratchet teeth 122 under the action of the locking spring arm 123, thereby preventing the shaft core from reversing.
[0050] In addition, two upper and lower positioning holes 124 are provided at the center of the outer side of the shell plane of the rear cover body 12 in this embodiment. Figure 7 As shown, it is used as the installation positioning hole of the ribbon cassette and the printer. The outer side of the shell plane of the front cover body 11 is provided with a hand grip groove 112, as shown in the attached Figure 5 As shown, it is convenient to take and place the ribbon cassette on the printer.
[0051] In addition, refer to the attached Figure 2 and 4 As shown, in this embodiment, the upper part of the box body 1 is also provided with an anti-counterfeiting plate 13 for checking the authenticity of the ribbon cassette. When the ribbon cassette is installed in the printer, it is used to check the authenticity of the ribbon cassette.
[0052] In the process of transportation and storage, the left flap 4 and the right flap 5 of the ribbon cassette of this embodiment are folded up, and the ribbon 3 is tightened outside the left flap 4 and the right flap 5. In this state, the ribbon cassette cannot be installed on a thermal transfer printer. Figure 1 and 2 Before using the ribbon cassette, first rotate the left flap 4 of the ribbon cassette to open and position it, then rotate the right flap 5 of the ribbon cassette to open and position it. During the opening process of the left flap 4 and the right flap 5, the ribbon 3 drives the shaft core 2 to rotate as the flaps open, and the ribbon 3 is also pulled out, finally forming the unfolded state of the ribbon cassette, as shown in the attached figure. Figure 3 and 4 shown.
[0053] This embodiment also discloses a printer using the above ribbon cassette. Fig.13As shown, a winding shaft 1001, an unwinding shaft 1002, a left flip plate guide shaft 1003, a right flip plate guide shaft 1004, a left carbon ribbon transition shaft 1005 and a right carbon ribbon transition shaft 1006 are provided on the installation vertical plate 100 of the printer. The reel 1001 and the unreel 1002 correspond to the two shaft cores 2 of the ribbon cassette respectively; the left flap guide shaft 1003 and the right flap guide shaft 1004 are respectively arranged on the lower and outer sides of the reel 1001 and the unreel 1002, and are used to gradually push the left flap 4 and the right flap 5 inward when the ribbon cassette is installed 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 printer's mounting plate 100 is also provided with a mounting positioning shaft 1007, which is used to correspond to the positioning hole 124 on the ribbon cassette to play a positioning role when installing the ribbon cassette.
[0055] During actual use, first align the two shaft cores 2 with the printer's winding shaft 1001 and unwinding shaft 1002, and insert the ribbon cassette. During the entire insertion process, the shaft core 2 of the ribbon cassette moves along the winding and unwinding shafts; when inserted to the 1 / 3 position, the installation positioning shaft 1007 on the printer contacts the installation positioning hole 124 on the rear cover 12 of the ribbon cassette, and the positioning insertion of the ribbon cassette begins. At this time, the front cover 11 and the rear cover 12 of the ribbon cassette are both positioned with the printer's installation positioning shaft 1007, and the shaft core 2 is positioned according to the winding and unwinding shaft, so that the shaft core 2 will not contact the outer shell during the process of winding and unwinding the ribbon, thereby reducing the influence of the outer shell on the winding and unwinding of the ribbon. When the ribbon cassette is inserted to the 1 / 2 position, the left flap guide shaft 1003 and the right flap guide shaft 1004 on the printer device come into play, and gradually push the left flap 4 and the right flap 5 inward until the ribbon cassette is fully pushed to the bottom, and the left flap 4 and the right flap 5 of the ribbon cassette are retracted inward for a certain distance, at which time the ribbon 3 contacts the left ribbon transition shaft 1005 and the right 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 cassette, so that the operation of the ribbon 3 during the entire printing process depends on the ribbon transition shaft on the printer device, avoiding problems such as the structural strength of the flap itself affecting the operation of the ribbon 3, and reducing interference factors. When printing is finished, the ribbon cassette is taken out, the right flap 5 and the left flap 4 are closed in turn, and then the ribbon 3 is manually tightened until the ribbon is tensioned.
[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art may make some simple modifications, equivalent changes or modifications using the technical contents disclosed above, which all fall within the protection scope of the present invention.
Claims
1. A ribbon cassette, comprising a cassette body and two shaft cores arranged inside the cassette body, and a ribbon wound around the two shaft cores, wherein the two shaft cores are arranged parallel to each other on both sides of the center of the cassette body, characterized in that: The first and second flaps are respectively provided at the two ends of the bottom of the box body, and the upper ends of the first and second flaps are rotatably connected to the two ends of the bottom of the box body respectively, and the lower ends of the first and second flaps can be relatively opened and relatively retracted, one end of the ribbon is fixed on one of the shaft cores, and the other end extends out from the side of the box body and passes through the outside of the first and second flaps, and then enters the box body from the other side of the box body and is fixedly wound around the other shaft core. When the lower ends of the first and second flaps are relatively opened, the ribbon is partially stretched and is in the ribbon box use state. When the lower ends of the first and second flaps are relatively retracted, the ribbon is tightened and is in the ribbon box non-use state.
2. The ribbon cassette according to claim 1, characterized in that: The lower ends of the first flap and the second flap are provided with a bending mechanism, the central area of the bending portion of the bending mechanism is cut, and the free end of the bending mechanism is provided with a lower rotating shaft in contact with the ribbon; An upper rotating shaft is respectively provided at the connection between the upper ends of the first flap and the second flap and the bottom of the box body, at least one end of the upper rotating shaft is provided with a rotating member, and a limiting protrusion is provided on the rotating member, and the limiting protrusion matches with different limiting grooves at the bottom of the box body to realize the limiting fixation of the first flap and the second flap in the open or retracted state.
3. The ribbon cassette according to claim 2, characterized in that: When the first flap and the second flap are relatively retracted, there is an overlapping portion, and one of the flaps is provided with an avoidance hole for the bending mechanism of the other flap to extend into.
4. The ribbon cassette according to any one of claims 1 to 3, characterized in that: The box body includes a front cover body and a rear cover body, and the front cover body and the rear cover body are respectively provided with two circular holes for installing the shaft core, and at least two inwardly extending elastic arms are provided on the annular periphery of each circular hole. Damping plates are respectively provided at both ends of the shaft core, and the two damping plates are in contact with the corresponding inwardly extending elastic arms to play a damping role when the shaft core rotates.
5. The ribbon cassette according to claim 4, characterized in that: Three evenly distributed inwardly extending elastic arms are arranged on the annular periphery of each circular hole.
6. The ribbon cassette according to claim 4, characterized in that: The shaft core is a hollow shaft, and a convex rib is provided inside the hollow shaft for correspondingly engaging with the convex rib on the printer's reel-up shaft to drive the shaft core to rotate, thereby realizing the unwinding and rewinding action of the ribbon during printing.
7. The ribbon cassette according to claim 4, characterized in that: A first ratchet tooth is provided on the arc surface at the lower end of the circular hole of the rear cover body, and a locking spring arm extending toward the center of the circular hole is provided on the arc surface at the upper end of the circular hole of the rear cover body. A second ratchet tooth meshing with the first ratchet tooth is provided at at least one end of the shaft core, and the second ratchet tooth can mesh with the first ratchet tooth under the action of the locking spring arm to prevent the shaft core from reversing.
8. The ribbon cassette according to claim 7, characterized in that: The first ratchet teeth include 5 teeth, and the second ratchet teeth are disposed at both ends of the shaft core.
9. The ribbon cassette according to claim 4, characterized in that: The rear cover body is provided with a ribbon box positioning groove, the front cover body is provided with a hand buckle groove, and the upper part of the box body is also provided with an anti-counterfeiting plate for authenticity inspection of the ribbon box.
10. A printer using the ribbon cassette according to any one of claims 1 to 9, characterized in that: A winding shaft, an unwinding shaft, a first flap guide shaft, a second flap guide shaft and two ribbon transition shafts are provided on the mounting plate of the printer, and the winding shaft and the unwinding shaft correspond to the two shaft cores of the ribbon cassette respectively; the first flap guide shaft and the second flap guide shaft are respectively arranged at the lower and outer sides of the winding shaft and the unwinding shaft, and are used for gradually pushing the first flap and the second flap inward when the ribbon cassette is inserted into the printer, so that the ribbon is separated from the first flap and the second flap; the two ribbon transition shafts are respectively arranged at the lower sides of the first flap guide shaft and the second flap guide shaft, and 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.