Thermal transfer printer

Abstract

The utility model provides a thermal transfer printer, and relates to the technical field of printers. The thermal transfer printer provided by the utility model comprises a rack, a printing head, a paper tape transmission device and a driving motor, the printing head and the paper tape transmission device are both arranged on the rack, and the printing head is used for printing on a paper tape; the paper tape transmission device comprises a second gear transmission mechanism, a third gear transmission mechanism, a paper tape roll shaft and a rubber roll shaft, the paper tape roll shaft is used for winding a paper tape, the rubber roll shaft is used for pulling the free end of the paper tape to move, and the second gear transmission mechanism and the third gear transmission mechanism are both in transmission connection with the driving motor; and the third gear transmission mechanism is in transmission connection with the rubber roller shaft. The utility model provides a thermal transfer printer which is not easy to have the problems of paper tape wrinkling, stacking or paper jam and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a printer technical field especially relates to a thermal transfer printer. BACKGROUND

[0002] As an important printing device, the thermal transfer printer is widely used in label printing, bill printing, product identification printing and many other fields. It uses the printing head to heat, and the ink on the carbon tape is sublimated or melted to transfer to the printing medium (such as paper tape, label, etc.), so as to realize clear and durable printing effect. In the actual operation process of the thermal transfer printer, the paper tape and the carbon tape have an important influence on the printing quality, the utilization rate of consumables and the debugging convenience.

[0003] In the prior art, most of the thermal transfer printers adopt a one-way forward paper feeding transmission mechanism. That is, during printing, the paper tape is synchronously moved forward in one direction by the gear, the paper tape is pulled from the paper roll to the printing area, and after the transfer between the printing head and the carbon tape is completed, it continues to be output forward. However, since the paper tape can only continuously travel in the forward direction and cannot retreat, it is prone to problems such as paper tape folding, stacking or paper jam. SUMMARY

[0004] In order to solve or alleviate at least one problem mentioned in the background art, the utility model provides a thermal transfer printer, which is not prone to problems such as paper tape folding, stacking or paper jam.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a thermal transfer printer, which comprises a rack, a printing head, a paper tape transmission device and a driving motor, the printing head and the paper tape transmission device are arranged on the rack, and the printing head is used for printing on the paper tape;

[0007] The paper tape transmission device comprises a second gear transmission mechanism, a third gear transmission mechanism, a paper tape roller shaft and a rubber roller shaft, the paper tape roller shaft is used for winding the paper tape, the rubber roller shaft is used for pulling the free end of the paper tape to move, the second gear transmission mechanism and the third gear transmission mechanism are in driving connection with the driving motor, and the third gear transmission mechanism is in driving connection with the rubber roller shaft;

[0008] When the driving motor is rotated forward, the second gear transmission mechanism is configured to be disengaged from the paper tape roller shaft, and the rubber roller shaft is configured to pull the paper tape to feed forward under the driving of the third gear transmission mechanism;

[0009] When the driving motor is reversed, the second gear transmission mechanism is configured to be in driving connection with the paper tape roller shaft to drive the paper tape roller shaft to wind the paper tape, and the rubber roller shaft is configured to pull the paper tape to retreat under the driving of the third gear transmission mechanism.

[0010] As an optional implementation, the carbon tape transmission device is further included, the carbon tape transmission device includes a first gear transmission mechanism, a first carbon tape roller shaft and a second carbon tape roller shaft, the first carbon tape roller shaft and the second carbon tape roller shaft are respectively used for winding two ends of the carbon tape, the driving motor and the first gear transmission mechanism are in transmission connection, the first gear transmission mechanism is configured to be in transmission connection with the first carbon tape roller shaft when the driving motor rotates forward and in transmission connection with the second carbon tape roller shaft when the driving motor reverses, so that the carbon tape is advanced or retreated;

[0011] The first gear transmission mechanism includes a driving gear, a first transmission gear, a first driven gear, a second transmission gear, a first connecting frame, a first driving gear and a second driving gear;

[0012] The driving gear and the driving motor are coaxially arranged and rotate under the driving of the driving motor, the first transmission gear is rotatably arranged on the frame, and the driving gear and the first transmission gear are in transmission connection;

[0013] The first driven gear and the first transmission gear are coaxially arranged and rotate synchronously with the first transmission gear, the first end of the first connecting frame is fixedly connected to the central shaft of the first transmission gear, and the second transmission gear is rotatably arranged on the second end of the first connecting frame;

[0014] The first driving gear is rotatably arranged on the frame, the first carbon tape roller shaft and the first driving gear are coaxially arranged, the second driving gear is rotatably arranged on the frame, and the second carbon tape roller shaft and the second driving gear are coaxially arranged;

[0015] When the driving motor rotates forward, the second end of the first connecting frame is configured to swing to the first carbon tape roller shaft, so that the second transmission gear and the first driving gear are engaged, thereby driving the first carbon tape roller shaft to wind the carbon tape;

[0016] When the driving motor rotates forward, the second end of the first connecting frame is configured to swing to the second carbon tape roller shaft, so that the second transmission gear is disengaged from the first driving gear and engaged with the second driving gear, thereby driving the second carbon tape roller shaft to wind the carbon tape.

[0017] As an optional implementation, the second transmission mechanism includes a third transmission gear, a second driven gear, a fourth transmission gear, a second connecting frame and a third driving gear, the driving gear and the third transmission gear are in transmission connection;

[0018] The second driven gear and the third transmission gear are coaxially arranged and rotate synchronously with the third transmission gear, the first end of the second connecting frame is fixedly connected to the central shaft of the third transmission gear, and the fourth transmission gear is rotatably arranged on the second end of the second connecting frame;

[0019] The third driving gear is rotatably arranged on the frame, and the paper tape roller shaft and the third driving gear are coaxially arranged;

[0020] When the driving motor is rotated in the positive direction, the fourth transmission gear is configured to disengage from the third driving gear, and the rubber roller shaft drives the paper tape to advance and feed the paper tape under the drive of the third gear transmission mechanism, while the paper tape roller shaft releases the paper tape;

[0021] When the driving motor is rotated in the positive direction, the second end of the second connecting frame is configured to swing towards the paper tape roller shaft to engage the fourth transmission gear with the third driving gear to drive the paper tape roller shaft to wind the paper tape, while the rubber roller shaft drives the paper tape to retreat under the drive of the third gear transmission mechanism.

[0022] As an optional embodiment, the third gear transmission mechanism includes a fourth driving gear rotatably arranged on the frame, the rubber roller shaft and the fourth driving gear are coaxially arranged, and the fourth driving gear is in transmission connection with the driving gear to drive the rubber roller shaft to drive the paper tape to advance or retreat.

[0023] As an optional embodiment, the fourth gear transmission mechanism includes a plurality of gears, the fourth gear transmission mechanism is in transmission connection with the driving gear, and the fourth driving gear is in transmission connection with the fourth gear transmission mechanism.

[0024] As an optional embodiment, the fourth gear transmission mechanism includes a first gear and a second gear, the first gear and the second gear are rotatably arranged on the frame, the driving gear is in transmission connection with the first gear, the second gear is in transmission connection with the first gear, and the fourth driving gear is engaged with the second gear.

[0025] As an optional embodiment, the fifth gear transmission mechanism is engaged with the driving gear, the first transmission gear, the third transmission gear, and the first gear.

[0026] As an optional embodiment, the fifth gear transmission mechanism includes a fifth transmission gear, a third driven gear, a sixth transmission gear, a seventh transmission gear, an eighth transmission gear, and a ninth transmission gear, the fifth transmission gear, the sixth transmission gear, the seventh transmission gear, the eighth transmission gear, and the ninth transmission gear are rotatably arranged on the frame.

[0027] The fifth transmission gear is engaged with the driving gear, the third driven gear is coaxially installed with the fifth transmission gear, the sixth transmission gear and the seventh transmission gear are engaged with the third driven gear, the eighth transmission gear is engaged with the seventh transmission gear, the first transmission gear is engaged with the eighth transmission gear, the ninth transmission gear is engaged with the sixth transmission gear, and the third transmission gear and the first gear are engaged with the ninth transmission gear.

[0028] As an optional implementation, the first carbon belt roller shaft, the second carbon belt roller shaft, the paper belt roller shaft and the rubber roller shaft are all in axial alignment.

[0029] As an optional implementation, the heat transfer printer further comprises a housing, which is arranged outside the rack.

[0030] The heat transfer printer provided by the utility model, which can realize the forward and backward operation of the paper belt flexibly through the forward and reverse rotation of the driving motor. During printing, the paper belt can be orderly fed under the traction of the rubber roller shaft, ensuring the smooth printing process. When debugging or handling paper jam and other problems are needed, the motor is reversed, the paper belt can be wound and recycled by the paper belt roller shaft, and can also be smoothly fed back under the assistance of the rubber roller shaft, effectively solving the problems of paper belt folding, stacking, paper jam and paper belt waste caused by the one-way forward feeding of the existing heat transfer printer, greatly improving the printing efficiency, material utilization rate and printing quality.

[0031] The heat transfer printer provided by the utility model, which can realize the forward and backward operation of the paper belt flexibly through the forward and reverse rotation of the driving motor. During printing, the paper belt can be orderly fed under the traction of the rubber roller shaft, ensuring the smooth printing process. When debugging or handling paper jam and other problems are needed, the motor is reversed, the paper belt can be wound and recycled by the paper belt roller shaft, and can also be smoothly fed back under the assistance of the rubber roller shaft, effectively solving the problems of paper belt folding, stacking, paper jam and paper belt waste caused by the one-way forward feeding of the existing heat transfer printer, greatly improving the printing efficiency, material utilization rate and printing quality. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0033] Figure 1 The first structure schematic view of the heat transfer printer provided by the embodiment of the utility model;

[0034] Figure 2 The second structure schematic view of the heat transfer printer provided by the embodiment of the utility model.

[0035] Explanation of reference signs:

[0036] 100 - thermal transfer printer

[0037] 110 - frame

[0038] 120 - print head

[0039] 130 - ribbon drive; 131 - first gear mechanism; 1311 - driving gear; 1312 - first transmission gear; 1313 - first driven gear; 1314 - second transmission gear; 1315 - first connecting frame; 1316 - first driving gear; 1317 - second driving gear; 132 - first ribbon roller; 133 - second ribbon roller

[0040] 140 - tape drive; 141 - second gear mechanism; 1411 - third transmission gear; 1412 - second driven gear; 1413 - fourth transmission gear; 1414 - second connecting frame; 1415 - third driving gear; 142 - third gear mechanism; 143 - tape roller; 144 - rubber roller

[0041] 150 - driving motor

[0042] 160 - fourth gear mechanism; 161 - first gear; 162 - second gear

[0043] 170 - fifth gear mechanism; 171 - fifth transmission gear; 172 - third driven gear; 173 - sixth transmission gear; 174 - seventh transmission gear; 175 - eighth transmission gear; 176 - ninth transmission gear DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0045] In the application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0046] And, in addition to the above-mentioned part of the term can be used to indicate the orientation or position relationship, for example, the term "upper" in some cases can also be used to indicate a certain dependent relationship or connection relationship. For those skilled in the art, the specific meaning of these terms in the utility model can be understood according to the specific circumstances.

[0047] In addition, the terms "mounting", "setting", "provided with", "connection", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0048] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific type and configuration may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated device, element or component. Unless otherwise stated, the meaning of "multiple" is two or more.

[0049] In the prior art, most of the thermal transfer printers adopt a one-way forward paper feeding transmission mechanism. That is, during printing, the paper tape is synchronously moved forward in one direction by the gear, the paper tape is pulled from the paper roll to the printing area, and after the transfer is completed between the print head and the carbon tape, it continues to be output forward. However, since the paper tape can only continuously travel in the forward direction and cannot retreat, problems such as paper tape folding, stacking or paper jam are prone to occur.

[0050] Therefore, the utility model provides a thermal transfer printer, which comprises a rack, a print head, a paper tape transmission device and a driving motor, the print head and the paper tape transmission device are arranged on the rack; the paper tape transmission device comprises a second gear transmission mechanism, a third gear transmission mechanism, a paper tape roller shaft and a rubber roller shaft, the paper tape roller shaft is used for winding the paper tape, the rubber roller shaft is used for pulling the free end of the paper tape to move, the second gear transmission mechanism and the third gear transmission mechanism are in driving connection with the driving motor, and the third gear transmission mechanism is in driving connection with the rubber roller shaft. During printing, the paper tape can be orderly fed under the traction of the rubber roller shaft, and the printing process is ensured to proceed smoothly. When debugging or handling paper jam and the like is needed, the motor is reversed, the paper tape can be wound back by the paper tape roller shaft for recycling, and the paper tape can be stably retracted under the assistance of the rubber roller shaft, effectively solving the problems of paper tape folding, stacking, paper jam and paper tape waste caused by the one-way forward paper feeding of the existing thermal transfer printer, and greatly improving the printing efficiency, the utilization rate of consumables and the printing quality.

[0051] Figure 1The first structure schematic diagram of the heat transfer printing machine is provided for the embodiment of the utility model. Figure 2 The second structure schematic diagram of the heat transfer printing machine is provided for the embodiment of the utility model. Figure 1 And Figure 2 The utility model embodiment provides a heat transfer printing machine 100, including frame 110, print head 120, paper tape transmission device 140 and drive motor 150, print head 120 and paper tape transmission device 140 all are arranged on frame 110, and print head 120 is used for printing on paper tape, paper tape transmission device 140 includes second gear transmission mechanism 141, third gear transmission mechanism 142, paper tape roller 143 and rubber roller 144, paper tape roller 143 is used for winding paper tape, and rubber roller 144 is used for pulling the free end of paper tape to move, second gear transmission mechanism 141, third gear transmission mechanism 142 all and drive motor 150 transmission are connected, and third gear transmission mechanism 142 and rubber roller 144 transmission are connected, when drive motor 150 is normal rotation, second gear transmission mechanism 141 is configured to be in and paper tape roller 143 is separated, and rubber roller 144 is configured to be pulled under the driving of third gear transmission mechanism 142 and paper tape advances and walks paper, when drive motor 150 is reversed, second gear 162 transmission machine is configured to be transmission connected with paper tape roller 143, to drive paper tape roller 143 winding paper tape, and rubber roller 144 is configured to be pulled under the driving of third gear transmission mechanism 142 and paper tape is retreated.

[0052] Among them, the heat transfer printing machine 100 can also include a shell, which is covered outside the frame 110, for protecting the various components on the frame 110.

[0053] The heat transfer printing machine 100 provided by the utility model embodiment can flexibly realize the forward and backward operation of the paper tape through the forward and reverse rotation of the drive motor 150. During printing, the paper tape can be orderly walked under the traction of the rubber roller 144, ensuring the smooth progress of the printing process. When debugging or handling paper jam problems, the motor is reversed, and the paper tape can be wound and recycled by the paper tape roller 143, and can also be smoothly retreated with the assistance of the rubber roller 144, effectively solving the problems of paper tape folding, stacking, paper jam, and paper tape waste caused by the one-way forward walking of the existing heat transfer printing machine 100, greatly improving the printing efficiency, material utilization rate, and printing quality.

[0054] In the above embodiment, the carbon tape transmission device 130 can also be included, which comprises a first gear transmission mechanism 131, a first carbon tape roller shaft 132 and a second carbon tape roller shaft 133, the first carbon tape roller shaft 132 and the second carbon tape roller shaft 133 are respectively used to wind both ends of the carbon tape, the driving motor 150 and the first gear transmission mechanism 131 are in transmission connection, the first gear transmission mechanism 131 is configured to be in transmission connection with the first carbon tape roller shaft 132 when the driving motor 150 rotates forward, and in transmission connection with the second carbon tape roller shaft 133 when the driving motor 150 reverses, so as to advance or retreat the carbon tape; the first gear transmission mechanism 131 comprises a driving gear 1311, a first transmission gear 1312, a first driven gear 1313, a second transmission gear 1314, a first connecting frame 1315, a first drive gear 1316 and a second drive gear 1317; the driving gear 1311 and the driving motor 150 are coaxially arranged and rotate under the driving of the driving motor 150, the first transmission gear 1312 is rotatably arranged on the rack 110, and the driving gear 1311 and the first transmission gear 1312 are in transmission connection; the first driven gear 1313 and the first transmission gear 1312 are coaxially arranged and rotate synchronously with the first transmission gear 1312, the first end of the first connecting frame 1315 is fixedly connected to the central shaft of the first transmission gear 1312, and the second transmission gear 1314 is rotatably arranged on the second end of the first connecting frame 1315; the first drive gear 1316 is rotatably arranged on the rack 110, the first carbon tape roller shaft 132 and the first drive gear 1316 are coaxially arranged, the second drive gear 1317 is rotatably arranged on the rack 110, and the second carbon tape roller shaft 133 and the second drive gear 1317 are coaxially arranged; when the driving motor 150 rotates forward, the second end of the first connecting frame 1315 is configured to swing to the first carbon tape roller shaft 132, so that the second transmission gear 1314 and the first drive gear 1316 are engaged, thereby driving the first carbon tape roller shaft 132 to wind the carbon tape; when the driving motor 150 rotates forward, the second end of the first connecting frame 1315 is configured to swing to the second carbon tape roller shaft 133, so that the second transmission gear 1314 is disengaged from the first drive gear 1316 and engaged with the second drive gear 1317, thereby driving the second carbon tape roller shaft 133 to wind the carbon tape.

[0055] When printing, the motor can rotate forward, the second gear 162 drives the motor and the paper tape roller shaft 143 to disengage, so that the paper tape roller shaft 143 is in a free rotating state. At this time, the rubber roller shaft 144 is driven by the third gear transmission mechanism 142 to pull the paper tape forward, while the first gear 161 drives the motor and the first carbon tape roller shaft 132 to drive the first carbon tape roller shaft 132 to advance the carbon paper, ensure stable thermal transfer printing of ink to the paper tape, and orderly paper tape under the traction of the rubber roller shaft 144. The paper tape is pulled to ensure that the printing process proceeds smoothly. When debugging or handling paper jam problems, the motor is reversed, the second gear 162 drives the motor and the paper tape roller shaft 143 to drive the paper tape roller shaft 143 to wind the paper tape, and the rubber roller shaft 144 is driven by the third gear transmission mechanism 142 to pull the paper tape back. At the same time, the drive motor 150 and the second carbon tape roller shaft 133 are connected to drive the carbon tape to retreat, avoiding problems such as paper tape folding, stacking, paper jam, and paper tape waste.

[0056] It should be noted that the second transmission gear 1314 can only engage with one of the first drive gear 1316 and the second drive gear 1317 at the same time. It can be understood that the first carbon tape roller shaft 132 can be used to recycle used carbon tape, and the second carbon tape roller shaft 133 is mainly used to wind unused carbon tape. When the first carbon tape roller shaft 132 actively recycles the carbon tape, the second carbon tape roller shaft 133 passively releases the carbon tape. When the second carbon tape roller shaft 133 actively winds the carbon tape, the first carbon tape roller shaft 132 passively releases the carbon tape. The first gear transmission mechanism 131 in the embodiment has the advantages of simple structure, stable and reliable transmission, and can ensure stable switching between the first carbon tape roller shaft 132 and the second carbon tape roller shaft 133, and reliable forward and backward movement of the paper tape and the carbon tape, further improving the printing quality.

[0057] In the above embodiment, the second transmission mechanism can include a third transmission gear 1411, a second driven gear 1412, a fourth transmission gear 1413, a second connecting frame 1414, and a third driving gear 1415. The driving gear 1311 and the third transmission gear 1411 are in transmission connection. The second driven gear 1412 and the third transmission gear 1411 are coaxially arranged and rotate synchronously with the third transmission gear 1411. The first end of the second connecting frame 1414 is fixedly connected to the central shaft of the third transmission gear 1411. The fourth transmission gear 1413 is rotatably arranged at the second end of the second connecting frame 1414. The third driving gear 1415 is rotatably arranged on the rack 110. The paper tape roller shaft 143 is coaxially arranged with the third driving gear 1415. When the driving motor 150 rotates forward, the fourth transmission gear 1413 is configured to disengage from the third driving gear 1415. The rubber roller shaft 144 pulls the paper tape forward under the action of the third gear transmission mechanism 142 to advance the paper tape, and at the same time, the paper tape roller shaft 143 releases the paper tape. When the driving motor 150 rotates forward, the second end of the second connecting frame 1414 is configured to swing towards the paper tape roller shaft 143 to engage the fourth transmission gear 1413 and the third driving gear 1415 to drive the paper tape roller shaft 143 to wind the paper tape, and at the same time, the rubber roller shaft 144 pulls the paper tape backward under the action of the third gear transmission mechanism 142 to retreat the paper tape.

[0058] In the above embodiment, the third gear transmission mechanism 142 can include a fourth driving gear rotatably arranged on the rack 110. The rubber roller shaft 144 is coaxially arranged with the fourth driving gear. The fourth driving gear and the driving gear 1311 are in transmission connection to drive the rubber roller shaft 144 to pull the paper tape forward or backward through the fourth driving gear, thereby ensuring the stability of the paper tape advancing and retreating.

[0059] In the above embodiment, a fourth gear transmission mechanism 160 can also be included. The fourth gear transmission mechanism 160 includes multiple gears. The fourth gear transmission mechanism 160 and the driving gear 1311 are in transmission connection. The fourth driving gear and the fourth gear transmission mechanism 160 are in transmission connection. The driving gear 1311 drives the fourth gear transmission mechanism 160 to operate. The first gear transmission mechanism 131 drives the fourth driving gear to rotate. Through such multi-stage gear transmission, the space on the rack 110 can be flexibly utilized, and the internal structure of the printer can be more compact. Specifically, the fourth gear transmission mechanism 160 includes a first gear 161 and a second gear 162. The first gear 161 and the second gear 162 are rotatably arranged on the rack 110. The driving gear 1311 and the first gear 161 are in transmission connection. The second gear 162 and the first gear 161 are in transmission connection. The fourth driving gear and the second gear 162 are engaged together.

[0060] In the above embodiment, the fifth gear transmission mechanism 170 can be further included, and the fifth gear transmission mechanism 170, the driving gear 1311, the first transmission gear 1312, the third transmission gear 1411 and the first gear 161 are all engaged together. In this way, the transmission mechanisms are more closely connected, which can improve the reliability of the transmission and the consistency of the transmission of the transmission mechanisms, and can further make the structure of the printer more compact and reduce the size of the printer.

[0061] In the above embodiment, the fifth gear transmission mechanism 170 can include a fifth transmission gear 171, a third driven gear 172, a sixth transmission gear 173, a seventh transmission gear 174, an eighth transmission gear 175 and a ninth transmission gear 176. The fifth transmission gear 171, the sixth transmission gear 173, the seventh transmission gear 174, the eighth transmission gear 175 and the ninth transmission gear 176 are all rotatably arranged on the frame 110. The fifth transmission gear 171 and the driving gear 1311 are engaged together, the third driven gear 172 and the fifth transmission gear 171 are coaxially installed, the sixth transmission gear 173 and the seventh transmission gear 174 are both engaged with the third driven gear 172, the eighth transmission gear 175 and the seventh transmission gear 174 are engaged together, the first transmission gear 1312 and the eighth transmission gear 175 are engaged together, the ninth transmission gear 176 and the sixth transmission gear 173 are engaged together, and the third transmission gear 1411 and the first gear 161 are both engaged with the ninth transmission gear 176. It can be understood that the driving gear 1311 drives the fifth transmission gear 171 to rotate, the third driven gear 172 and the fifth transmission gear 171 rotate synchronously, the third driven gear 172 drives the sixth transmission gear 173 and the seventh transmission gear 174 to rotate respectively, the seventh transmission gear 174 drives the eighth transmission gear 175 to rotate, the eighth transmission gear 175 drives the first transmission gear 1312 to rotate, the sixth transmission gear 173 drives the ninth transmission gear 176 to rotate, and the ninth transmission gear 176 simultaneously drives the third transmission gear 1411 and the first gear 161 to rotate.

[0062] In the above embodiment, the axial directions of the first carbon ribbon shaft 132, the second carbon ribbon shaft 133, the paper ribbon shaft 143 and the rubber roller shaft 144 can be consistent, which can ensure the stability and reliability of power transmission and help the stable transmission of the paper ribbon and the carbon ribbon.

[0063] Finally, it needs to be explained that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A thermal transfer printer characterized by comprising: The printer comprises a frame, a printing head, a paper tape transmission device and a driving motor, the printing head and the paper tape transmission device are arranged on the frame, and the printing head is used for printing on the paper tape; The paper tape transmission device comprises a second gear transmission mechanism, a third gear transmission mechanism, a paper tape roller shaft and a rubber roller shaft, the paper tape roller shaft is used for winding the paper tape, the rubber roller shaft is used for pulling the free end of the paper tape to move, the second gear transmission mechanism and the third gear transmission mechanism are in transmission connection with the driving motor, and the third gear transmission mechanism is in transmission connection with the rubber roller shaft; When the driving motor rotates forward, the second gear transmission mechanism is configured to be disengaged from the paper tape roller shaft, and the rubber roller shaft is configured to pull the paper tape to move forward under the driving of the third gear transmission mechanism; When the driving motor reverses, the second gear transmission mechanism is configured to be in transmission connection with the paper tape roller shaft to drive the paper tape roller shaft to wind the paper tape, and the rubber roller shaft is configured to pull the paper tape to move backward under the driving of the third gear transmission mechanism.

2. The heat transfer printer according to claim 1, characterized by The printer further comprises a carbon tape transmission device; The carbon tape transmission device comprises a first gear transmission mechanism, a first carbon tape roller shaft and a second carbon tape roller shaft, the first carbon tape roller shaft and the second carbon tape roller shaft are respectively used for winding two ends of the carbon tape, the driving motor is in transmission connection with the first gear transmission mechanism, the first gear transmission mechanism is configured to be in transmission connection with the first carbon tape roller shaft when the driving motor rotates forward, and in transmission connection with the second carbon tape roller shaft when the driving motor reverses, so as to drive the carbon tape to move forward or backward; The first gear transmission mechanism comprises a driving gear, a first transmission gear, a first driven gear, a second transmission gear, a first connecting frame, a first driving gear and a second driving gear; The driving gear is coaxially arranged with the driving motor and rotates under the driving of the driving motor, the first transmission gear is rotatably arranged on the frame, and the driving gear and the first transmission gear are in transmission connection; The first driven gear is coaxially arranged with the first transmission gear and rotates synchronously with the first transmission gear, the first end of the first connecting frame is fixedly connected to the central shaft of the first transmission gear, and the second transmission gear is rotatably arranged on the second end of the first connecting frame; The first driving gear is rotatably arranged on the frame, the first carbon tape roller shaft is coaxially arranged with the first driving gear, the second driving gear is rotatably arranged on the frame, and the second carbon tape roller shaft is coaxially arranged with the second driving gear; When the driving motor rotates forward, the second end of the first connecting frame is configured to swing to the first carbon tape roller shaft, so that the second transmission gear and the first driving gear are engaged, thereby driving the first carbon tape roller shaft to wind the carbon tape; When the driving motor rotates forward, the second end of the first connecting frame is configured to swing to the second carbon tape roller shaft, so that the second transmission gear is disengaged from the first driving gear and engaged with the second driving gear, thereby driving the second carbon tape roller shaft to wind the carbon tape.

3. The heat transfer printer according to claim 2, characterized by The second gear transmission mechanism comprises a third transmission gear, a second driven gear, a fourth transmission gear, a second connecting frame and a third driving gear, the driving gear and the third transmission gear are in transmission connection; The second driven gear and the third transmission gear are coaxially arranged and rotate synchronously with the third transmission gear, the first end of the second connecting frame is fixedly connected to the central shaft of the third transmission gear, and the fourth transmission gear is rotatably arranged at the second end of the second connecting frame; The third driving gear is rotatably arranged on the rack, and the paper tape roller shaft and the third driving gear are coaxially arranged; When the driving motor rotates forward, the fourth transmission gear is configured to disengage from the third driving gear, the rubber roller shaft pulls the paper tape to advance and feed the paper tape under the driving of the third gear transmission mechanism, and at the same time, the paper tape roller shaft releases the paper tape; When the driving motor rotates forward, the second end of the second connecting frame is configured to swing towards the paper tape roller shaft to make the fourth transmission gear and the third driving gear mesh to drive the paper tape roller shaft to wind the paper tape, and at the same time, the rubber roller shaft pulls the paper tape to retreat under the driving of the third gear transmission mechanism.

4. The heat transfer printer according to claim 3, characterized by The third gear transmission mechanism comprises a fourth driving gear, the fourth driving gear is rotatably arranged on the rack, the rubber roller shaft and the fourth driving gear are coaxially arranged, and the fourth driving gear and the driving gear are in transmission connection to drive the rubber roller shaft to pull the paper tape to feed or retreat the paper tape through the fourth driving gear.

5. The heat transfer printer according to claim 4, characterized in that It also comprises a fourth gear transmission mechanism, the fourth gear transmission mechanism comprises multiple gears, the fourth gear transmission mechanism and the driving gear are in transmission connection, and the fourth driving gear and the fourth gear transmission mechanism are in transmission connection.

6. The heat transfer printer according to claim 5, wherein The fourth gear transmission mechanism comprises a first gear and a second gear, the first gear and the second gear are rotatably arranged on the rack, the driving gear and the first gear are in transmission connection, the second gear and the first gear are in transmission connection, and the fourth driving gear and the second gear are meshed together.

7. The heat transfer printer according to claim 6, characterized in that It also comprises a fifth gear transmission mechanism, the fifth gear transmission mechanism and the driving gear, the first transmission gear, the third transmission gear and the first gear are all meshed together.

8. The heat transfer printer according to claim 7, characterized by The fifth gear transmission mechanism comprises a fifth transmission gear, a third driven gear, a sixth transmission gear, a seventh transmission gear, an eighth transmission gear and a ninth transmission gear, the five transmission gears, the sixth transmission gear, the seventh transmission gear, the eighth transmission gear and the ninth transmission gear are rotatably arranged on the rack; The fifth transmission gear and the driving gear are engaged together, the third driven gear and the fifth transmission gear are coaxially installed, the sixth transmission gear and the seventh transmission gear are both engaged with the third driven gear, the eighth transmission gear and the seventh transmission gear are engaged together, the first transmission gear and the eighth transmission gear are engaged together, the ninth transmission gear and the sixth transmission gear are engaged together, and the third transmission gear and the first gear are both engaged with the ninth transmission gear.

9. The heat transfer printer according to any one of claims 2 to 8, characterized in that, The axial directions of the first carbon belt roller shaft, the second carbon belt roller shaft, the paper belt roller shaft and the rubber roller shaft are uniform.

10. The heat transfer printer according to any one of claims 1 to 8, characterized in that, The machine further comprises a housing, which is arranged outside the machine frame.

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