Printer

Abstract

The utility model discloses a printer, which comprises a host, a thermal transfer ribbon box, a first reel, a second reel and an anti-inversion mechanism, and is characterized in that the thermal transfer ribbon box is detachably arranged on the host; the first reel and the second reel are arranged side by side and are rotatably connected to the thermal transfer ribbon box, the first reel drives the thermal transfer ribbon wound on the first reel to be conveyed towards the second reel when rotating, and the second reel drives the thermal transfer ribbon from the first reel to be wound and recycled when rotating; the anti-inversion mechanism is installed on the thermal transfer ribbon box and has a first state and a second state, in the first state, the anti-inversion mechanism is matched with the second reel in a limiting mode so as to prevent the second reel from inversely rotating and releasing the thermal transfer ribbon wound and recycled by the second reel, and in the second state, the anti-inversion mechanism and the second reel are not limited. According to the invention, the problem of unclear transfer content caused by reverse rotation of the reel for recovering the thermal transfer ribbon can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing technology, and in particular to a printer. BACKGROUND

[0002] In the related art, a printer realizes the transmission of a carbon ribbon through the synchronous rotation of two reels arranged side by side, one of which releases unused carbon ribbon and the other of which recycles used carbon ribbon.

[0003] However, during use, the reel that recycles the carbon ribbon is reversed, causing the used carbon ribbon to be withdrawn to the printing position, thereby resulting in unclearly transferred content. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a printer for improving the problem of unclearly transferred content caused by the reversal of the reel that recycles the carbon ribbon.

[0005] Embodiments of the present application provide a printer, which comprises a host, a carbon ribbon cartridge, a first reel, a second reel, and an anti-reversal mechanism. The carbon ribbon cartridge is detachably arranged on the host. The first reel and the second reel are arranged side by side and rotatably connected to the carbon ribbon cartridge. When the first reel rotates, it drives the carbon ribbon wound thereon to be transmitted towards the second reel. When the second reel rotates, it drives the carbon ribbon from the first reel to be wound and recycled. The anti-reversal mechanism is installed on the carbon ribbon cartridge, and the anti-reversal mechanism has a first state and a second state. In the first state, the anti-reversal mechanism is in position cooperation with the second reel to prevent the second reel from being reversed to release the carbon ribbon wound and recycled by the second reel. In the second state, the anti-reversal mechanism is out of position cooperation with the second reel.

[0006] In some embodiments, when the carbon ribbon cartridge is detached from the host, the anti-reversal mechanism is in the first state. When the carbon ribbon cartridge is installed on the host, the anti-reversal mechanism is in the second state.

[0007] In some embodiments, the second reel is provided with a position-limiting groove. In the first state, the anti-reversal mechanism is in position cooperation with the position-limiting groove. In the second state, the anti-reversal mechanism is out of position cooperation with the position-limiting groove.

[0008] In some embodiments, the anti-reversal mechanism comprises a position-limiting member movably connected to the carbon ribbon cartridge, and the position-limiting member has a functional end. In the first state, the functional end moves to be in position cooperation with the second reel. In the second state, the functional end moves to be out of position cooperation with the second reel.

[0009] In some embodiments, the anti-reverse mechanism comprises a limiting member, the limiting member comprises a rotating portion and a inserting portion, the rotating portion is rotatably connected to the carbon ribbon cartridge, the inserting portion is connected to the rotating portion; the second spool is provided with a limiting slot; in the first state, the inserting portion is inserted into the limiting slot along a first direction, the first direction intersects with a rotating direction of the second spool.

[0010] In some embodiments, the second spool is provided with a limiting plate at an end surface of an axial end, and the limiting slot is arranged on the limiting plate.

[0011] In some embodiments, the second spool is provided with the limiting slot at an end surface of an axial end.

[0012] In some embodiments, the second spool is provided with a protrusion at an axial end, the protrusion extends radially outward from an outer wall of the second spool; and the limiting slot is arranged on the protrusion.

[0013] In some embodiments, the protrusion is annular, and the protrusion surrounds the second spool.

[0014] In some embodiments, a side surface of the protrusion is flush with an end surface of an axial end of the second spool.

[0015] In some embodiments, the limiting slot is a plurality of limiting slots, and the plurality of limiting slots are arranged at intervals along a circumferential direction of the second spool.

[0016] In some embodiments, an end of the inserting portion away from the rotating portion is tapered in a direction away from the rotating portion.

[0017] In some embodiments, an end of the inserting portion close to the rotating portion is tapered in a direction close to the rotating portion.

[0018] In some embodiments, a slot of the limiting slot is tapered.

[0019] In some embodiments, the limiting slot has a first side wall and a second side wall opposite to each other in a rotating direction of the second spool, the second side wall is located downstream of the rotating direction of the second spool compared with the first side wall; the inserting portion has a first side surface and a second side surface opposite to each other in the rotating direction of the second spool, in the first state, the first side surface faces the first side wall, the second side surface faces the second side wall, and the second side surface is parallel to the second side wall.

[0020] In some embodiments, in the first state, the second side surface is perpendicular to a tangent of the rotating direction of the second spool.

[0021] In some embodiments, in the first state, an end of the second side near the rotating part is inclined towards an upstream of a rotating direction of the second spool.

[0022] In some embodiments, the printer further comprises an elastic member, one end of the elastic member is connected to the ribbon cartridge, and the other end is connected to the anti-reversing mechanism; the elastic member can provide an elastic force to enable the anti-reversing mechanism to maintain the first state.

[0023] In some embodiments, the ribbon cartridge comprises a housing and an end cover detachably connected to the housing, the housing is provided with a first through hole and a second through hole, the first spool is arranged in the first through hole, and the second spool is arranged in the second through hole; the end cover seals openings of the first through hole and the second through hole; and the anti-reversing mechanism is arranged in the housing.

[0024] In some embodiments, the printer further comprises an abutting member; the abutting member is connected to the anti-reversing mechanism and extends out of the ribbon cartridge, when the main machine abuts against the abutting member and drives the anti-reversing mechanism to move to the second state when the ribbon cartridge is assembled in the main machine; or the abutting member is connected to the main machine and extends into the ribbon cartridge, when the main machine abuts against the anti-reversing mechanism and drives the anti-reversing mechanism to move to the second state when the ribbon cartridge is assembled in the main machine.

[0025] In some embodiments, a limiting protrusion is arranged in the ribbon cartridge, and one end of the second spool is rotatably connected to the limiting protrusion, and the limiting protrusion abuts against the second spool to limit axial movement of the second spool.

[0026] In some embodiments, the printer further comprises a damping member arranged between the ribbon cartridge and the second spool to enable the second spool to have rotational damping.

[0027] The printer of the embodiments of the present application can release and recover the ribbon through the side-by-side first spool and second spool, and the anti-reversing mechanism arranged on the ribbon cartridge can release the second spool when the first spool and the second spool need to work, so that the ribbon can be smoothly released and recovered. When the first spool and the second spool do not need to work, the anti-reversing mechanism and the second spool limit each other to prevent the second spool from reversing, so as to avoid the recovered ribbon from being released by the second spool, thereby avoiding the used ribbon from being recovered to the printing position to be used for printing again, and thus ensuring the clarity of the transferred content. BRIEF DESCRIPTION OF DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A perspective view of a printer according to an embodiment of this application is shown.

[0030] Figure 2 An exploded view of a printer according to one embodiment of this application is shown.

[0031] Figure 3 A schematic diagram of the cooperation between the second reel and the anti-reverse mechanism in one embodiment of this application is shown.

[0032] Figure 4 It shows Figure 3 A magnified view of a portion of point A in the middle.

[0033] Figure 5 Another exploded view of the printer in one embodiment of this application is shown.

[0034] Figure 6 It shows Figure 5 A magnified view of a section at point B in the middle.

[0035] Figure 7 A schematic diagram of the cooperation between the anti-reverse mechanism and the elastic element in one embodiment of this application is shown.

[0036] Figure 8 A perspective view of the housing of a ribbon cartridge according to one embodiment of this application is shown.

[0037] Figure 9 A perspective view of the end cap of a carbon ribbon cartridge according to one embodiment of this application is shown.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Printer;

[0040] 10. Host computer;

[0041] 20. Ribbon box; 21. Housing; 211. First through hole; 212. Second through hole; 22. End cap; 23. Limiting protrusion; 24. Shaft; 25. Mounting lug;

[0042] 30a, First reel; 30b, Second reel; 31, Limiting groove; 311, First sidewall; 312, Second sidewall; 32, Limiting plate;

[0043] 40, anti-reverse mechanism; 41, limiting member; 411, rotating part; 412, plug-in part; 4121, first side; 4122, second side;

[0044] 50, elastic member;

[0045] 60, abutting member;

[0046] 70, damping member;

[0047] X, first direction; Y, rotating direction. DETAILED DESCRIPTION

[0048] In order to make the objects, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in conjunction with the accompanying drawings.

[0049] The following description refers to the accompanying drawings. In the following description, same numbers in different drawings represent same or similar elements unless otherwise represented. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0050] In the related art, a printer realizes the transmission of a carbon ribbon by the synchronous rotation of two reels arranged side by side, one of which releases unused carbon ribbon and the other of which recycles used carbon ribbon. In the case where the two reels stop rotating, if the carbon ribbon or any one of the reels is subjected to an external force, the position of the carbon ribbon can change. For example, when the carbon ribbon or the reel for recycling is subjected to a force in the opposite direction of the transmission direction, the reel for recycling can be reversed to release the carbon ribbon recycled thereby, so that the used carbon ribbon is withdrawn to the printing position, thereby causing unclear transfer content.

[0051] To solve the above problem, the present application provides a printer, which releases and recycles carbon ribbon by first and second reels arranged side by side, and sets an anti-reverse mechanism on the carbon ribbon cartridge. When the first and second reels need to work, the anti-reverse mechanism releases the second reel, so that the carbon ribbon can be smoothly released and recycled. When the first and second reels do not need to work, the anti-reverse mechanism is limited to cooperate with the second reel, to prevent the second reel from reversing, so as to avoid the release of the recycled carbon ribbon by the second reel, thereby avoiding the used carbon ribbon from being withdrawn to the printing position to be used for printing again, and further ensuring the clarity of the transfer content.

[0052] Referring to Figure 1 and Figure 2 , the printer 1 provided by the embodiments of the present application includes a host 10, a carbon ribbon cartridge 20, a first reel 30a, a second reel 30b and an anti-reverse mechanism 40.

[0053] The host 10 is not limited in shape, and can provide installation reference and accommodation space for other mechanical and electrical components of the printer 1. The carbon ribbon cartridge 20 is not limited in shape, and can provide installation reference for the first spool 30a and the second spool 30b and other possible components. The carbon ribbon cartridge 20 is detachably arranged on the host 10, so as to facilitate the disassembly and assembly of the first spool 30a and the second spool 30b, and the adjustment and replacement of the carbon ribbon.

[0054] The first spool 30a and the second spool 30b are arranged side by side, and the first spool 30a and the second spool 30b are rotatably connected to the carbon ribbon cartridge 20. The first spool 30a and the second spool 30b are the same in size or different in size. When the first spool 30a rotates, the carbon ribbon wound thereon is transmitted towards the second spool 30b, and when the second spool 30b rotates, the carbon ribbon from the first spool 30a is wound back for recycling, thereby realizing the transmission of the carbon ribbon, so that during the printing process, the unused carbon ribbon can be continuously delivered to the printing position, and the used carbon ribbon can be timely delivered from the printing position to the second spool 30b and recycled.

[0055] The anti-reversing mechanism 40 is arranged on the carbon ribbon cartridge 20, and the anti-reversing mechanism 40 has a first state and a second state. In the first state, the anti-reversing mechanism 40 is in position cooperation with the second spool 30b to prevent the second spool 30b from reversing to release the recycled carbon ribbon wound thereon, and in the second state, the anti-reversing mechanism 40 is out of position cooperation with the second spool 30b. In this way, when the first spool 30a and the second spool 30b need to work, the anti-reversing mechanism 40 releases the second spool 30b, so that the carbon ribbon can be smoothly delivered and recycled. When the first spool 30a and the second spool 30b do not need to work, the anti-reversing mechanism 40 is in position cooperation with the second spool 30b to prevent the second spool 30b from reversing to release the recycled carbon ribbon, thereby avoiding the used carbon ribbon from returning to the printing position to be used for printing again, and further ensuring the clarity of the transferred content.

[0056] Optionally, the carbon ribbon cartridge 20 comprises a housing, and the housing is provided with an accommodation cavity, and the first spool 30a and the second spool 30b are rotatably connected in the accommodation cavity. In this way, the first spool 30a, the second spool 30b and the carbon ribbon can be protected by the housing.

[0057] Optionally, the housing is provided with a window in communication with the accommodation cavity, and the window exposes a part of the carbon ribbon, so as to ensure that the carbon ribbon can be in contact with the object to be printed outside the housing to realize the printing function. In this way, the shape of the accommodation cavity can be set to be matched with the shape of the first spool 30a and the second spool 30b, and the accommodation space for other components required for printing does not need to be reserved in the carbon ribbon cartridge 20, so that the first spool 30a and the second spool 30b can be limited by the accommodation cavity, and the rotation process of the first spool 30a and the second spool 30b is more stable.

[0058] In some embodiments, the anti-reversing mechanism 40 is in the first state when the carbon ribbon cartridge 20 is detached from the host 10, and is in the second state when the carbon ribbon cartridge 20 is installed in the host 10. In other words, when the carbon ribbon cartridge 20 is detached from the host 10, the anti-reversing mechanism 40 can limit the second spool 30b, so as to prevent the second spool 30b from being reversed in the state that the printer 1 is not working.

[0059] Referring to Figure 3 and Figure 4 In some embodiments, the second spool 30b is provided with a limiting slot 31, in the first state, the anti-reversing mechanism 40 is in limiting cooperation with the limiting slot 31, and in the second state, the anti-reversing mechanism 40 is out of limiting cooperation with the limiting slot 31. In this way, the limiting cooperation between the anti-reversing mechanism 40 and the second spool 30b is realized through the limiting slot 31, the structure of the second spool 30b is changed less, and the structure is simple and convenient to operate.

[0060] In some embodiments, the anti-reversing mechanism 40 includes a limiting member 41 movably connected to the carbon ribbon cartridge 20, and the limiting member 41 has a functional end. In the first state, the functional end is moved to limiting cooperation with the second spool 30b, and in the second state, the functional end is moved to out of limiting cooperation with the second spool 30b. In this way, the limiting cooperation and the out of limiting cooperation are realized through the movement of the functional end, which not only guarantees the anti-reversing function of the anti-reversing mechanism 40 in the first state, but also guarantees that the functional end of the anti-reversing mechanism 40 is moved to a position that does not interfere with the normal work of the second spool 30b in the second state.

[0061] Referring to Figures 5 to 7 In some embodiments, the anti-reversing mechanism 40 includes a limiting member 41, and the limiting member 41 includes a rotating part 411 and a plug-in part 412. The rotating part 411 is movably connected to the carbon ribbon cartridge 20, and the plug-in part 412 is connected to the rotating part 411. The second spool 30b is provided with a limiting slot 31, in the first state, the plug-in part 412 is plugged into the limiting slot 31 along a first direction X, and the first direction X intersects with a rotating direction Y of the second spool 30b (see Figure 4 ). For example, the first direction X is perpendicular to the tangential direction of the rotating direction Y of the second spool 30b, or the included angle between the first direction X and the tangential direction of the rotating direction Y of the second spool 30b is an acute angle. In this way, through the plug-in cooperation between the plug-in part 412 and the limiting slot 31, the plug-in part 412 blocks the rotating path of the second spool 30b, so as to limit the second spool 30b, and the structure is simple and convenient to operate.

[0062] Continuing to refer to Figures 5 to 7Optionally, the carbon tape cartridge 20 is provided with a rotating shaft 24 fixed relative to the carbon tape cartridge 20, the rotating shaft 24 penetrates the rotating part 411 of the limiting part 41, and the rotating part 411 is rotatable relative to the rotating shaft 24, so as to realize the rotational connection between the rotating part 411 and the carbon tape cartridge 20.

[0063] Optionally, the carbon tape cartridge 20 is provided with two mounting lugs 25 spaced from each other, and the two ends of the rotating shaft 24 are fixed on the two mounting lugs 25, respectively. In this way, the rotating shaft and the carbon tape cartridge 20 are spaced from each other, so as to avoid friction between the rotating part 411 and the carbon tape cartridge 20 during rotation.

[0064] Optionally, the rotating part 411 and the plug-in part 412 are integrally formed, so as to make the limiting part 41 have strong structural strength.

[0065] Referring to Figure 3 and Figure 4 In some embodiments, the second spool 30b is provided with a limiting plate 32 at an end face of an axial end, and the limiting groove 31 is arranged on the limiting plate 32. For example, the edge of the limiting plate 32 is provided with the limiting groove 31 in the shape of C or U. In this way, the limiting cooperation between the second spool 30b and the anti-reverse mechanism 40 can be realized without changing the structure of the second spool 30b.

[0066] Optionally, taking a plane perpendicular to the axis of the second spool 30b as a reference plane, the orthographic projection of the limiting groove 31 on the reference plane is located outside the orthographic projection of the second spool 30b on the reference plane. It can be understood that in the second state, the limiting part 41 not only releases the limiting cooperation, but also avoids interfering with the rotation of the second spool 30b. Based on this, in the second state, the limiting part 41 needs to be as far as possible from the axis of the second spool 30b in the radial direction. In the setting of the present embodiment, the radial distance between the limiting part 41 in the first state and the axis of the second spool 30b is far, so that the limiting part 41 needs to move a smaller distance during the switching from the first state of limiting cooperation to the second state of releasing the limiting cooperation. In this way, the movement space of the limiting part 41 needs to be reserved is smaller, so as to reduce the volume of the printer 1.

[0067] Optionally, the limiting plate 32 is circular, and the center of the limiting plate 32 is located on the straight line where the axis of the second spool 30b is located. In this way, the limiting plate 32 is less likely to interfere with the surrounding components when it rotates with the second spool 30b.

[0068] Optionally, the limiting plate 32 is in the shape of a circular ring, and the center of the limiting plate 32 is located on the straight line where the axis of the second roller 30b is located. In this way, on the one hand, the limiting plate 32 is less likely to interfere with the surrounding components, and on the other hand, the limiting plate 32 can be adapted to the hollow structure of the second roller, that is, when the second roller 30b is in a hollow structure, the arrangement of the limiting plate 32 will not block the connection between the second roller 30b and the main machine 10.

[0069] In some embodiments, the end surface of the second roller 30b at one end in the axial direction is provided with a limiting groove 31. In this way, the limiting cooperation between the second roller 30b and the anti-reverse mechanism 40 is achieved while the structure of the second roller 30b is less changed. Moreover, since the limiting groove 31 is directly arranged on the end surface of the second roller 30b, no additional components are added, space is saved, and thus the volume of the printer 1 is reduced.

[0070] In some embodiments, the second roller 30b is provided with a protrusion (not shown in the figure) at one end in the axial direction. The position of the protrusion in the axial direction of the second roller 30b can be flexibly adjusted according to requirements. The protrusion extends outward from the outer side wall of the second roller 30b, for example, extends radially outward, or the included angle between the extension direction and the radial direction is an acute angle. The limiting groove 31 is arranged on the protrusion. In this way, the limiting cooperation between the second roller 30b and the anti-reverse mechanism 40 can be achieved without changing the structure of the second roller 30b.

[0071] Optionally, the protrusion is in the shape of a ring, and the protrusion surrounds the second roller 30b. In this way, the connection between the protrusion and the second roller 30b is more stable, thereby more stably limiting the cooperation with the limiting piece 41.

[0072] Optionally, one side surface of the protrusion is flush with the end surface of the second roller 30b at one end in the axial direction. In this way, the arrangement of the protrusion does not additionally occupy the space in the axial direction of the second roller 30b, thereby reducing the volume of the printer 1.

[0073] In some embodiments, the number of limiting grooves 31 is multiple, and the multiple limiting grooves 31 are arranged at intervals in the circumferential direction of the second roller 30b. In this way, when the second roller 30b stops at any position in the rotation direction Y, the insertion part 412 can be quickly inserted and limited by the limiting groove 31, avoiding the reverse rotation of the second roller 30b, or reducing the angle of the reverse rotation of the second roller 30b.

[0074] Referring to Figure 7In some embodiments, the end of the insertion portion 412 away from the rotating portion 411 is tapered in a direction away from the rotating portion 411. For example, the end of the insertion portion 412 away from the rotating portion 411 has one or more side surfaces inclined with respect to the extension direction of the insertion portion 412, so that the end of the insertion portion 412 away from the rotating portion 411 forms a tapered structure. In this way, the insertion portion 412 can be more smoothly inserted into the limiting groove 31, so that the anti-reverse mechanism 40 can be more quickly limited to cooperate with the second reel 30b.

[0075] In some embodiments, the end of the insertion portion 412 close to the rotating portion 411 is tapered in a direction close to the rotating portion 411. In this way, the structural strength of the connection between the insertion portion 412 and the rotating portion 411 is enhanced, so that the risk of breakage of the limiting member 41 is reduced.

[0076] Referring to Figure 4 In some embodiments, the slot of the limiting groove 31 is tapered. In this way, the insertion portion 412 can be more easily inserted into the limiting groove 31, so that the anti-reverse mechanism 40 can be more quickly limited to cooperate with the second reel 30b.

[0077] In some embodiments, the limiting groove 31 has a first side wall 311 and a second side wall 312 opposite in the rotation direction Y of the second reel 30b, and the second side wall 312 is located downstream of the first side wall 311 in the rotation direction Y of the second reel 30b. The insertion portion 412 has a first side surface 4121 and a second side surface 4122 opposite in the rotation direction Y of the second reel 30b, and in the first state, the first side surface 4121 faces the first side wall 311, the second side surface 4122 faces the second side wall 312, and the second side surface 4122 is parallel to the second side wall 312. In this way, the contact area between the second side surface 4122 and the second side wall 312 is larger, and the friction therebetween is larger, so that the insertion portion 412 can be stably inserted into the limiting groove 31, thereby stably limiting the second reel 30b.

[0078] Optionally, in the first state, the second side surface 4122 is perpendicular to the tangent of the rotation direction Y of the second reel 30b. Based on this, when the second reel 30b has a tendency to rotate due to external force, the second reel 30b cannot rotate due to the blocking effect of the second side surface 4122 of the insertion portion 412 perpendicular to the tangent of the rotation direction Y, that is, the limiting groove 31 can stably limit the second reel 30b, preventing the second reel 30b from being reversed by external force.

[0079] Optionally, in the first state, one end of the second side surface 4122 close to the rotating part 411 is inclined towards the upstream of the rotating direction Y of the second spool 30b. Based on this, when the second spool 30b has a tendency to rotate due to external force, the second side wall 312 of the limiting slot 31 not only blocks the second side surface 4122 of the plug-in part in the tangential direction perpendicular to the rotating direction Y, but also blocks the plug-in part 412 in the plug-in direction of the plug-in part 412, i.e. blocks the plug-in part 412 from escaping from the limiting slot 31 in the reverse direction of the plug-in direction, thereby improving the stability of the limiting of the second spool 30b by the limiting slot 31.

[0080] Referring to Figure 6 and Figure 7 In some embodiments, the printer 1 further comprises an elastic member 50 such as a spring or a spring sheet. One end of the elastic member 50 is connected to the ribbon cartridge 20, and the other end is connected to the anti-reversing mechanism 40. The elastic member 50 can provide an elastic force to enable the anti-reversing mechanism 40 to maintain the first state. In this way, the elastic force of the elastic member 50 provides a driving force for the anti-reversing mechanism 40, enabling the anti-reversing mechanism 40 to stably limit the second spool 30b, and the structure is simple and the cost is low.

[0081] Referring to Figures 5 to 7 In an exemplary embodiment, the printer 1 comprises a ribbon cartridge 20, a second spool 30b, an anti-reversing mechanism 40 and an elastic member 50. The second spool 30b is rotatably connected to the ribbon cartridge 20. The anti-reversing mechanism 40 comprises a limiting member 41, the limiting member 41 comprises a rotating part 411 and a plug-in part 412, the rotating part 411 is rotatably connected to the ribbon cartridge 20, and the plug-in part 412 is connected to the rotating part 411. The second spool 30b is provided with a limiting slot 31, and in the first state, the plug-in part 412 is plugged into the limiting slot 31 in a direction intersecting the rotating direction Y of the second spool 30b. One end of the elastic member 50 is connected to the ribbon cartridge 20, and the other end is connected to the anti-reversing mechanism 40. The elastic member 50 can provide an elastic force to enable the anti-reversing mechanism 40 to maintain the first state. In this way, when the first spool 30a and the second spool 30b do not need to work, the plug-in part 412 is plugged into the limiting slot 31 in a direction intersecting the rotating direction Y of the second spool 30b, and the elastic force of the elastic member 50 drives the plug-in part 412 to maintain the plugged state, preventing the second spool 30b from reversing, avoiding the release of the recycled ribbon by the second spool 30b, thereby avoiding the used ribbon from returning to the printing position to be used for printing again, and further ensuring the clarity of the transferred content.

[0082] In combination Figure 5 , Figure 8 and Figure 9In some embodiments, the carbon ribbon cartridge 20 comprises a housing 21 and a cover 22 detachably connected to the housing 21, the housing 21 is provided with a first through hole 211 and a second through hole 212, the first spool 30a is arranged in the first through hole 211, and the second spool 30b is arranged in the second through hole 212, the cover 22 seals the opening of the first through hole 211 and the opening of the second through hole 212, thereby preventing sundries from entering the first through hole 211 and the second through hole 212, and protecting the first spool 30a and the second spool 30b. Further, the anti-reverse mechanism 40 is arranged in the housing 21, so that the anti-reverse mechanism 40 is not easily affected during the disassembly and assembly of the cover 22.

[0083] In combination Figure 5 and Figure 7 In some embodiments, the printer 1 further comprises an abutting piece 60 connected to the anti-reverse mechanism 40 and extending out of the carbon ribbon cartridge 20, when the carbon ribbon cartridge 20 is assembled in the host machine 10, the host machine 10 abuts against the abutting piece 60 and drives the anti-reverse mechanism 40 to move to the second state.

[0084] In other embodiments, the printer 1 further comprises an abutting piece 60 connected to the host machine 10 and extending into the carbon ribbon cartridge 20, when the carbon ribbon cartridge 20 is assembled in the host machine 10, the abutting piece 60 abuts against the anti-reverse mechanism 40 and drives the anti-reverse mechanism 40 to move to the second state.

[0085] Therefore, through the arrangement of the abutting piece 60, the disassembly and assembly actions between the carbon ribbon cartridge 20 and the host machine 10 are linked with the state switching actions of the anti-reverse mechanism 40, which not only improves the efficiency of the state switching of the anti-reverse mechanism 40, but also simplifies the overall structure.

[0086] In combination Figure 2 , Figure 8 and Figure 9 In some embodiments, the carbon ribbon cartridge 20 is provided with a limiting protrusion 23, one end of the second spool 30b is rotatably connected to the limiting protrusion 23, and the limiting protrusion 23 abuts against the second spool 30b to limit the axial movement of the second spool 30b. It can be understood that the abutting of the limiting protrusion 23 against the second spool 30b includes the direct abutting of the limiting protrusion 23 against the second spool 30b, and there are other components between the limiting protrusion 23 and the second spool 30b, and the limiting protrusion 23 indirectly abuts against the second spool 30b through the components. Therefore, the rotation of the second spool 30b is more stable due to the limitation of the axial movement during the rotation of the second spool 30b, thereby making the transmission of the carbon ribbon more stable.

[0087] In an exemplary embodiment, the carbon tape cartridge 20 comprises a casing 21 and an end cover 22 detachably connected with the casing 21, the casing 21 is provided with a first through hole 211 and a second through hole 212, the first reel 30a is arranged in the first through hole 211, the second reel 30b is arranged in the second through hole 212, the end cover 22 seals the opening of the first through hole 211 and the opening of the second through hole 212, one side of the end cover 22 towards the casing 21 is provided with a limiting protrusion 23, when the end cover 22 is assembled with the casing 21, the limiting protrusion 23 extends into the second through hole 212 and presses against the second reel 30b. In this way, the stability of the second reel 30b during rotation is ensured, and the axial space occupation is reduced.

[0088] In some embodiments, the printer 1 further comprises a damping member 70 arranged between the carbon tape cartridge 20 and the second reel 30b, so that the second reel 30b has rotational damping. For example, when the carbon tape cartridge 20 comprises the end cover 22, the limiting protrusion 23 is arranged on the end cover 22, and the damping member 70 is a compression spring sleeved on the limiting protrusion 23, wherein the model of the compression spring can be flexibly selected according to design requirements. In this way, the friction during rotation of the second reel 30b can be increased, and further, the second reel 30b is prevented from being reversed.

[0089] In the description of the present application, it should be understood that the terms "first", "second" and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "a plurality of" means at least two, for example, two, three, four, and the like. "And / or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and / or B can mean that there are three cases of A alone, A and B together, and B alone. The character " / " generally represents that the associated objects before and after it are in an "or" relationship.

[0090] The above disclosure is only the preferred embodiment of the present application, which cannot limit the scope of the right of the present application, therefore, the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A printer, characterized in that, include: Host; A ribbon cartridge is detachably mounted on the main unit; A first reel and a second reel are rotatably connected side-by-side to the ribbon cartridge. When the first reel rotates, it drives the ribbon wound on it toward the second reel. When the second reel rotates, it rewinds the ribbon from the first reel. An anti-reverse mechanism is installed on the ribbon cartridge, and the anti-reverse mechanism has a first state and a second state. In the first state, the anti-reverse mechanism is engaged with the second reel to prevent the second reel from reversing and releasing the ribbon that it has wound and retracted. In the second state, the anti-reverse mechanism is released from the second reel.

2. The printer according to claim 1, characterized in that, When the ribbon cartridge is separated from the host, the anti-reverse mechanism is in the first state; when the ribbon cartridge is installed on the host, the anti-reverse mechanism is in the second state.

3. The printer according to claim 1, characterized in that, The second reel is provided with a limiting groove. In the first state, the anti-reverse mechanism is engaged with the limiting groove; in the second state, the anti-reverse mechanism is released from the limiting groove.

4. The printer according to claim 1, characterized in that, The anti-reverse mechanism includes a limiting member movably connected to the ribbon cartridge, the limiting member having a functional end; In the first state, the functional end moves to engage with the second scroll's limiting position; In the second state, the functional end moves to release the restriction from the second reel.

5. The printer according to claim 1, characterized in that, The anti-reverse mechanism includes a limiting member, which includes a rotating part and a plug-in part. The rotating part is rotatably connected to the ribbon box, and the plug-in part is connected to the rotating part. The second reel is provided with a limiting groove; In the first state, the insertion part is inserted into the limiting groove along the first direction, which intersects with the rotation direction of the second scroll.

6. The printer according to claim 5, characterized in that, A limiting plate is provided on one end face of the second reel along the axial direction, and the limiting groove is provided on the limiting plate.

7. The printer according to claim 5, characterized in that, The second reel has the limiting groove on one end face along the axial direction.

8. The printer according to claim 5, characterized in that, The second spool has a protrusion at one end along the axial direction, and the protrusion extends radially outward from the outer side wall of the second spool; The limiting groove is provided on the protrusion.

9. The printer according to claim 8, characterized in that, The protrusion is constructed in a ring shape and surrounds the second spool.

10. The printer according to claim 8, characterized in that, One side surface of the protrusion is flush with the end face of one end of the second scroll along the axial direction.

11. The printer according to claim 5, characterized in that, The number of the limiting grooves is multiple, and the multiple limiting grooves are arranged at intervals along the circumference of the second scroll.

12. The printer according to claim 5, characterized in that, Along the direction away from the rotating part, the end of the plug portion away from the rotating part is tapered.

13. The printer according to claim 5, characterized in that, Along the direction close to the rotating part, the end of the plug portion near the rotating part is gradually widened.

14. The printer according to claim 5, characterized in that, The opening of the limiting groove is gradually widened.

15. The printer according to claim 5, characterized in that, The limiting groove has a first sidewall and a second sidewall opposite to each other along the rotation direction of the second scroll, and the second sidewall is located downstream of the first sidewall in the rotation direction of the second scroll. The insertion part has a first side and a second side opposite to each other along the rotation direction of the second scroll. In the first state, the first side faces the first sidewall, the second side faces the second sidewall, and the second side is parallel to the second sidewall.

16. The printer according to claim 15, characterized in that, In the first state, the second side is perpendicular to the tangential direction of the rotation of the second scroll.

17. The printer according to claim 15, characterized in that, In the first state, the end of the second side near the rotating part is inclined upstream in the rotation direction of the second spool.

18. The printer according to claim 1, characterized in that, The printer also includes an elastic element, one end of which is connected to the ribbon cartridge and the other end of which is connected to the anti-reverse mechanism; The elastic element provides elastic force so that the anti-reverse mechanism can maintain the first state.

19. The printer according to claim 1, characterized in that, The ribbon cartridge includes a housing and an end cap detachably connected to the housing. The housing is provided with a first through hole and a second through hole. The first spool is disposed in the first through hole, the second spool is disposed in the second through hole, and the end cap blocks the opening of the first through hole and the opening of the second through hole. The anti-reverse mechanism is located on the housing.

20. The printer according to claim 1, characterized in that, The printer also includes an abutment; The abutment is connected to the anti-reverse mechanism and extends out of the ribbon cartridge. When the ribbon cartridge is assembled into the main unit, the main unit presses against the abutment and drives the anti-reverse mechanism to move to the second state; or The abutment is connected to the host and extends into the ribbon cartridge. When the ribbon cartridge is assembled with the host, the abutment presses against the anti-reverse mechanism and drives the anti-reverse mechanism to move to the second state.

21. The printer according to claim 1, characterized in that, The ribbon cartridge is provided with a limiting protrusion. One end of the second reel is rotatably connected to the limiting protrusion, and the limiting protrusion presses against the second reel to restrict the second reel from moving axially.

22. The printer according to claim 1, characterized in that, The printer also includes a damping element disposed between the ribbon cartridge and the second reel, so that the second reel has rotational damping.

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