Energy-saving thermal transfer printer

Abstract

The invention provides an energy-saving thermal transfer printer, and belongs to the technical field of printers. The energy-saving thermal transfer printer comprises a transmission module, a printing module and a state switching module. The transmission module is used for transmitting the to-be-printed piece from the input end to the printing area and from the printing area to the output end. The printing module is arranged in the printing area, is used for printing on a to-be-printed piece, and comprises a printing head and a colored tape arranged around the printing head. The state switching module comprises a power clutch assembly and is used for switching the working state of the printing module, and the printing module is driven by the power clutch assembly to be in transmission connection with the transmission module so that the colored tape and the to-be-printed piece can rotate synchronously. The printing module is driven to be separated from the transmission module through the power clutch assembly, so that the moving speed of the ribbon is smaller than that of the to-be-printed piece or the ribbon stops rotating. The technical problems of waste of driving force and improvement of energy consumption caused by design defects of a transmission system in a heat transfer printer in the related technology can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of printers, and in particular to an energy-saving thermal transfer printer. Background Art

[0002] Thermal transfer overprinter (TTO) is a printer that uses thermal transfer technology. It uses a special thermal transfer ribbon and works similarly to the print head of a fax machine. The coating on the thermal transfer ribbon is heated and transferred to paper or other types of materials, thereby printing a pattern with higher definition.

[0003] In the related art, a thermal transfer printer is usually provided with multiple printing areas, and the printing modules arranged in different printing areas are used to realize the separate or simultaneous printing of multiple patterns in the feeding direction of the workpiece to be printed. In response to the demand for miniaturization of thermal transfer printers, the requirements for the integration and integration of the ribbon inside the thermal transfer printer and the transmission structure of the workpiece to be printed are becoming increasingly higher. In existing thermal transfer printers, the feed drive for the workpiece to be printed and the rotation of the ribbon in the printing module are often synchronously driven through the same set of gear transmission systems to ensure working synchronization and integration.

[0004] However, the printing modules in the multiple printing areas do not need to work at the same time all the time, and the printed workpiece needs to be fed with driving force all the time. At this time, the driving components related to the ribbon in the printing module will still idle and work ineffectively under the drive of the related gear transmission system that provides the feeding driving force, resulting in a waste of driving force and increasing the overall energy consumption of the thermal transfer printer. Summary of the invention

[0005] The embodiment of the present invention provides an energy-saving thermal transfer printer, which can solve the technical problems of driving force waste and increased energy consumption caused by transmission system design defects in thermal transfer printers in related technologies. The technical solution is as follows: The embodiment of the present invention provides an energy-saving thermal transfer printer, including a transmission module, a printing module, and a state switching module. The transmission module is used to transmit the workpiece to be printed from the input end to the printing area, and from the printing area to the output end; The printing module is arranged in the printing area and is used for printing on the workpiece to be printed. The printing module comprises a printing head and a ribbon arranged around the printing head. The state switching module includes a power clutch component for switching the working state of the printing module: The printing module is driven to be connected with the transmission module through the power clutch assembly, so that the ribbon and the workpiece to be printed rotate synchronously; The printing module is driven to separate from the transmission module by the power clutch assembly, so that the moving speed of the ribbon is lower than the moving speed of the piece to be printed or the ribbon stops rotating.

[0006] Optionally, the state switching module is used to switch the working state of the printing module, and further includes: The power clutch assembly drives the ribbon to approach the workpiece to be printed; The ink ribbon is driven away from the workpiece to be printed by the power clutch assembly.

[0007] Optionally, the power clutch assembly drives the printing module to be transmission-connected with the transmission module via a driving end close to the ribbon; the power clutch assembly drives the printing module to be separated from the transmission module via a driving end far away from the ribbon.

[0008] Optionally, the power clutch assembly includes a lifting mechanism, and the lifting mechanism is used to drive the printing module to be connected or separated from the transmission module, or to drive the ribbon to approach or move away from the workpiece to be printed.

[0009] Optionally, a power lifting arm is arranged above the lifting mechanism, and the power lifting arm includes a first lifting end cooperating with the lifting mechanism and a first driving end cooperating with the driving end of the ribbon. The lifting mechanism switches the transmission connection and separation between the transmission module and the driving end of the ribbon by driving the power lifting arm.

[0010] Optionally, the transmission module includes a ribbon transmission gear, and the driving end of the ribbon includes a ribbon driving gear. Under the drive of the lifting mechanism, the ribbon driving gear is engaged with or disengaged from the ribbon transmission gear.

[0011] Optionally, the first driving end is provided with a transmission gear set, the transmission gear set includes at least one transmission gear, and under the drive of the lifting mechanism, the ribbon driving gear is engaged with or disengaged from the transmission gear.

[0012] Optionally, the transmission gear set includes at least two mutually meshing transmission gears, the power lifting arm is hinged to the printing module, and the rotating shaft of the hinged connection between the power lifting arm and the printing module is the rotating shaft of one of the transmission gears in the transmission gear set.

[0013] Optionally, the power lifting arm is provided with a limiting groove arranged along the circumference of the rotating shaft, and the printing module is provided with a limiting protrusion extending into the limiting groove.

[0014] Optionally, the ribbon driving gear is coaxially connected to a ribbon driving shaft, and a limiting mechanism is sleeved on the ribbon driving shaft, and the limiting mechanism is used to limit the unidirectional rotation of the ribbon.

[0015] Optionally, the limiting mechanism is a one-way bearing.

[0016] Optionally, the lifting mechanism is a first eccentric wheel rotatably mounted in the thermal transfer printer, and the first eccentric wheel is in contact with the first lifting end.

[0017] Optionally, a displacement lifting arm is arranged above the lifting mechanism, and the displacement lifting arm includes a second lifting end cooperating with the lifting mechanism and a second driving end cooperating with the printing module. The lifting mechanism switches the ribbon to approach and move away from the workpiece to be printed by driving the displacement lifting arm.

[0018] Optionally, the second driving end is connected to the print head.

[0019] Optionally, bracket ear plates are provided on both sides of the print head, and the lifting mechanism contacts the second lifting end to drive the second driving end to lift the bracket ear plates or separate from the bracket ear plates.

[0020] Optionally, a return spring fixedly connected to the inside of the thermal transfer printer is arranged on the top of the print head.

[0021] Optionally, the lifting mechanism is a second eccentric wheel rotatably mounted in the thermal transfer printer, the displacement lifting arm is rotatably connected in the thermal transfer printer, the second eccentric wheel is in contact with the second lifting end, and under the rotation of the second eccentric wheel, the movement directions of the second driving end and the second lifting end are opposite.

[0022] Optionally, the transmission module also includes a transmission mechanism, the lifting mechanism includes a first eccentric wheel and a second eccentric wheel, and the transmission mechanism is connected to the first eccentric wheel and the second eccentric wheel to control the first eccentric wheel to drive the driving end of the ribbon in the printing module to be connected or disconnected with the transmission module, and the second eccentric wheel drives the ribbon to approach or move away from the workpiece to be printed.

[0023] Optionally, the transmission mechanism is a mode switching shaft whose one end is connected to the switching motor, and the first eccentric wheel and the second eccentric wheel are coaxially arranged on the mode switching shaft.

[0024] Optionally, two groups of printing modules are provided along the feeding direction of the workpiece to be printed, and the driving ends of the ribbons of the two groups of printing modules are synchronously driven by a transmission module.

[0025] Optionally, the transmission mechanism is provided with two mode switching shafts, and the two mode switching shafts are used to respectively control the working state switching of the two printing modules.

[0026] Optionally, the transmission module includes transmission rollers arranged on both sides of the printing area, and in the feeding direction of the workpiece to be printed, the linear speed of the transmission roller located on the output end side is greater than the linear speed of the transmission roller located on the input end side.

[0027] Optionally, a paper feeding channel arranged along the feeding direction of the workpiece to be printed is provided in the printing area, and the paper feeding channel is used to limit and guide the upper and lower side surfaces of the workpiece to be printed.

[0028] Optionally, the paper feeding channel is provided with an opening structure for communicating with the side.

[0029] Optionally, the two groups of transmission modules are driven by belts.

[0030] Optionally, the power clutch assemblies in the two groups of state switching modules are driven synchronously.

[0031] Optionally, the printing modules are arranged in a plurality of groups along the feeding direction of the workpiece to be printed, and the driving ends of the ribbons of the plurality of printing modules are synchronously driven by a transmission module.

[0032] Optionally, the transmission module is further used to: when the printing task is completed, transmit the to-be-printed workpiece from the printing area to the starting position of the printing area or the input end.

[0033] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least: The energy-saving thermal transfer printer provided by the embodiment of the present invention is adopted. By setting a state switching module that cooperates with the printing module and the transmission module in the thermal transfer printer, the power clutch component is used to drive the printing module to switch modes relative to the transmission module. When the thermal transfer printer is working, the transmission module works to realize the feeding transmission of the workpiece to be printed, so that the workpiece to be printed passes through the printing area along the feeding direction. When the printing module in the printing area is required to implement the printing task, the power clutch component is used to drive the printing module and the transmission module to realize the transmission connection. The power transmission module is used to provide driving force for the printing module, specifically the driving end of the ribbon, so that the ribbon and the workpiece to be printed rotate synchronously, ensuring that the lower ribbon is always in a coated state when the print head is working with heating, so as to realize accurate printing. When the printing module in the printing area is not required to implement the printing task and the print head stops heating, the power clutch component is used to drive the printing module to separate from the transmission module, so that the movement speed of the ribbon relative to the workpiece to be printed fed below is reduced or stopped. At this time, the transmission module is switched to provide power only for feeding the workpiece to be printed, reducing the power required by the transmission module as the overall transmission power supply end, while avoiding the waste of consumables caused by idling of the ribbon, thereby solving the technical problems of waste of driving force and increased energy consumption caused by design defects of the transmission system in thermal transfer printers in related technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a front view of the internal transmission structure of the energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 2 It is a right view of the internal transmission structure of the energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 3 yes Figure 1 Structural cross-section at AA in the middle; Figure 4 is a top view of the structure of an energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 5 yes Figure 4 Structural cross-section at the middle BB; Figure 6 It is a structural schematic diagram of one side of the internal transmission structure of the energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 7is a structural schematic diagram of the other side of the internal transmission structure of the energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of a transmission structure related to a transmission roller provided in an embodiment of the present invention; Fig. 9 yes Figure 2 A magnified view of the local structure; Fig.10 It is a transmission logic block diagram of the state switching module provided by an embodiment of the present invention; Fig.11 is a schematic diagram of the coordination structure of the lifting mechanism and the power lifting arm under the first working condition; Fig.12 is a schematic diagram of the coordination structure of the lifting mechanism and the displacement lifting arm under the first working condition; Fig.13 is a schematic diagram of the coordination structure of the lifting mechanism and the power lifting arm under the second working condition; Fig.14 is a schematic diagram of the coordination structure of the lifting mechanism and the displacement lifting arm under the second working condition; Fig.15 It is a schematic diagram of the coordination structure of the lifting mechanism and the power lifting arm under the third working condition; Fig.16 is a schematic diagram of the coordination structure of the lifting mechanism and the displacement lifting arm under the third working condition; Fig.17 is a schematic diagram of the coordination structure of the lifting mechanism and the power lifting arm under the fourth working condition; Fig.18 It is a schematic diagram of the coordination structure of the lifting mechanism and the displacement lifting arm under the fourth working condition.

[0036] In the figure: 1-transmission module; 2-printing module; 3-state switching module; 4-power clutch assembly; 5-paper feeding channel; 11-ribbon transmission gear; 12-transmission mechanism; 13-transmission roller; 14-driving wheel; 21-print head; 22-ribbon; 23-limiting protrusion; 41-lifting mechanism; 41a-first eccentric wheel; 41b-second eccentric wheel; 42-power lifting arm; 43-displacement lifting arm; 51-upper limit plate; 52-lower limit plate; 211-bracket ear frame plate; 212-reset spring; 221-ribbon driving gear; 222-ribbon driving shaft; 223-limiting mechanism; 421-first lifting end; 422-first driving end; 423-transmission gear set; 424-limiting slot; 431-second lifting end; 432-second driving end; 4231-transmission gear; a-printing area; m-driving motor. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] Figure 1 is a front view of the internal transmission structure of the energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 2 It is a right view of the internal transmission structure of the energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 3 yes Figure 1 Structural cross-section at AA in the middle; Figure 4 is a top view of the structure of an energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 5 yes Figure 4 Structural cross-section at the middle BB; Figure 6 It is a structural schematic diagram of one side of the internal transmission structure of the energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 7 is a structural schematic diagram of the other side of the internal transmission structure of the energy-saving thermal transfer printer provided by an embodiment of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of a transmission structure related to a transmission roller provided in an embodiment of the present invention; Fig. 9 yes Figure 2 A magnified view of the local structure; Fig.10 It is a transmission logic block diagram of the state switching module provided by an embodiment of the present invention; Fig.11 is a schematic diagram of the coordination structure of the lifting mechanism and the power lifting arm under the first working condition; Fig.12 is a schematic diagram of the coordination structure of the lifting mechanism and the displacement lifting arm under the first working condition; Fig.13 is a schematic diagram of the coordination structure of the lifting mechanism and the power lifting arm under the second working condition; Fig.14 is a schematic diagram of the coordination structure of the lifting mechanism and the displacement lifting arm under the second working condition; Fig.15 It is a schematic diagram of the coordination structure of the lifting mechanism and the power lifting arm under the third working condition; Fig.16 is a schematic diagram of the coordination structure of the lifting mechanism and the displacement lifting arm under the third working condition; Fig.17 is a schematic diagram of the coordination structure of the lifting mechanism and the power lifting arm under the fourth working condition; Fig.18 It is a schematic diagram of the coordination structure of the lifting mechanism and the displacement lifting arm under the fourth working condition.

[0039] like Figures 1 to 18 As shown, an embodiment of the present invention provides an energy-saving thermal transfer printer, including a transmission module 1, a printing module 2, and a state switching module 3.

[0040] The transmission module 1 is used to transmit the workpiece to be printed from the input end to the printing area a, and from the printing area a to the output end. For example, in an embodiment of the present invention, the energy-saving thermal transfer printer is arranged along the feeding direction of the workpiece to be printed (such as printing paper or other materials to be printed), that is, Figure 6 and Figure 8 Two printing areas a are arranged in sequence in the direction of the arrow shown in FIG. A transmission roller 13 for driving the workpiece to be printed is arranged on both sides of each printing area a, and two adjacent printing areas a can share the same transmission roller 13. The position of the transmission roller 13 behind each printing area a in the feeding direction of the workpiece to be printed can be regarded as the output end of the printing area a.

[0041] The printing module 2 is arranged in the printing area a, and is used to print on the workpiece to be printed. The printing module 2 includes a printing head 21 and a ribbon 22 arranged around the printing head 21. The printing head 21 is a liftable structure, which can heat up and press the ribbon 22 downward to contact the workpiece to be printed to achieve printing after the workpiece to be printed is conveyed to the bottom under the control of a corresponding control structure. When the printing head 21 is not heated, it will be lifted to a certain extent under the control of a corresponding control structure, so that the ribbon 22 below is separated from the workpiece to be printed, ensuring its smooth feeding.

[0042] The state switching module 3 includes a power clutch assembly 4, which is used to switch the working state of the printing module 2: the printing module 2 is driven to be connected with the transmission module 1 through the power clutch assembly 4, so that the ribbon 22 rotates synchronously with the workpiece to be printed; the printing module 2 is driven to separate from the transmission module 1 through the power clutch assembly 4, so that the moving speed of the ribbon 22 is less than the moving speed of the workpiece to be printed or stops rotating.

[0043] The energy-saving thermal transfer printer provided by the embodiment of the present invention is adopted. By setting a state switching module 3 that cooperates with the printing module 2 and the transmission module 1 in the thermal transfer printer, the power clutch component 4 is used to drive the printing module 2 to switch modes relative to the transmission module 1. When the thermal transfer printer is working, the transmission module 1 works to realize the feeding transmission of the workpiece to be printed, so that the workpiece to be printed passes through the printing area a along the feeding direction. When the printing module 2 in the printing area a is required to implement the printing task, the power clutch component 4 is used to drive the printing module 2 and the transmission module 1 to achieve transmission connection. The power transmission module 1 is used to provide driving force for the printing module 2, specifically the driving end of the ribbon 22, so that the ribbon 22 and the workpiece to be printed rotate synchronously, ensuring that the lower ribbon 22 is always in a coated state when the print head 21 is working with heating, so as to achieve accurate printing. When the printing module 2 in the printing area a is not required to implement the printing task and the print head 21 stops heating, the printing module 2 is driven to separate from the transmission module 1 through the power clutch component 4, so that the movement speed of the ribbon 22 relative to the workpiece to be printed fed below is reduced or stopped. At this time, the transmission module 1 is switched to provide power only for feeding the workpiece to be printed, thereby reducing the power required by the transmission module 1 as the overall transmission power supply end, and avoiding the waste of consumables caused by the idling of the ribbon 22, thereby solving the technical problems of waste of driving force and increased energy consumption caused by design defects of the transmission system in thermal transfer printers in related technologies.

[0044] Optionally, the state switching module 3 is used to switch the working state of the printing module 2, and also includes: driving the ribbon 22 close to the workpiece to be printed through the power clutch assembly 4; driving the ribbon 22 away from the workpiece to be printed through the power clutch assembly 4. Exemplarily, in an embodiment of the present invention, in addition to realizing the mode switching of the ribbon 22 rotating, decelerating and stopping relative to the workpiece to be printed under different working conditions through the state switching module 3. Furthermore, the state switching module 3 is based on being able to simultaneously drive the ribbon 22 to achieve a relative position change relative to the workpiece to be printed below. When the printing module 2 in the printing area a is required to implement a printing task, the entire printing module 2 is adjusted through the power clutch assembly 4, driving the printing module 2 as a whole, or the print head 21 as a whole to descend, so that the print head 21 heats up and works while driving the ribbon 22 to approach and press down the workpiece to be printed to complete printing. When the printing module 2 in the printing area a is not needed to perform the printing task and the print head 21 stops heating, the printing module 2 as a whole is driven by the power clutch assembly 4, or the print head 21 as a whole is lifted, so that the ribbon 22 is separated from the downward pressure of the print head 21 and moves away from the workpiece to be printed, thereby ensuring the smooth passage of the workpiece to be printed and avoiding contact with the ribbon 22 to cause accidental contact with the toner or coating, thereby achieving accurate mode switching and ensuring printing accuracy.

[0045] Optionally, the power clutch assembly 4 drives the printing module 2 to be connected to the transmission module 1 through the driving end close to the ribbon 22; the power clutch assembly 4 drives the printing module 2 to be separated from the transmission module 1 through the driving end far away from the ribbon 22. Exemplarily, in an embodiment of the present invention, the power clutch assembly 4 includes a lifting mechanism 41, and the lifting mechanism 41 adjusts the relative position of the power clutch assembly 4 relative to the driving end of the ribbon 22 by performing a certain lifting and lifting action inside the thermal transfer printer, thereby driving the printing module 2 to be connected to or separated from the transmission module 1, or driving the ribbon 22 to be close to or away from the workpiece to be printed, and completing the mode switching. It makes full use of the space above the printing module 2 when the workpiece to be printed is fed through the printing area a in the inner shell of the thermal transfer printer, avoids setting up an additional complex driving structure to realize the coordination and separation between multiple transmission components, and reduces the overall occupied volume of the thermal transfer printer.

[0046] Optionally, a power lifting arm 42 is provided above the lifting mechanism 41, and the power lifting arm 42 includes a first lifting end 421 matched with the lifting mechanism 41 and a first driving end 422 matched with the driving end of the ribbon 22. The lifting mechanism 41 switches the transmission module 1 to connect and disconnect with the driving end of the ribbon 22 by driving the power lifting arm 42. Exemplarily, in the embodiment of the present invention, by providing the power lifting arm 42 as a relay structure as a relay transmission member between the lifting mechanism 41 and the driving end 22 of the ribbon 22, its modular setting can facilitate timely replacement when it is aged or damaged after long-term operation, thereby improving the overall service life.

[0047] Specifically, in the embodiment of the present invention, the transmission module 1 includes a ribbon transmission gear 11, which is one or more gears in a gear set for driving a transmission roller 13 for feeding a workpiece to be printed. The driving end of the ribbon 22 includes a ribbon driving gear 221, which is a transmission gear connected to one end of one of the rollers around which the ribbon 22 is wound in the printing module 2. Driven by the lifting mechanism 41, the ribbon driving gear 221 and the ribbon transmission gear 11 approach and move away from each other under the drive of the power lifting arm 42, and achieve engagement or separation, thereby determining whether to use the power on the side of the workpiece to be printed to provide power for the rotation of the ribbon 22.

[0048] Optionally, the first driving end 422 is provided with a transmission gear set 423, and the transmission gear set 423 includes at least one transmission gear 4231. Under the drive of the lifting mechanism 41, the ribbon driving gear 221 is meshed with or separated from the transmission gear 4231. Specifically, there are at least two mutually meshing transmission gears 4231 in the transmission gear set 423, the power lifting arm 42 is hinged to the printing module 2, and the rotating shaft of the power lifting arm 42 and the printing module 2 is the rotating shaft of one of the transmission gears 4231 in the transmission gear set 423. Exemplarily, in the embodiment of the present invention, reference is made to Figure 2 Taking this working condition as an example, through the state change of the lifting mechanism 41, the rotating shaft seat of the smaller transmission gear 4231 in the two transmission gear sets 423 on the left power lifting arm 42 is the rotating shaft for the hinged connection between the power lifting arm 42 and the printing module 2. The smaller transmission gear 4231 is always meshed with the ribbon driving gear 221, while the larger transmission gear 4231 is meshed with the ribbon driving gear 11, thereby realizing the meshing transmission between the ribbon driving gear 221 and the ribbon driving gear 11. The structure of the power lifting arm 42 on the right side is the same as that on the left side. At this time, due to the change in the state of the lifting mechanism 41 relative to the left side, the power lifting arm 42 on the right side rotates clockwise around its hinged shaft at a certain angle under the drive of the lifting mechanism relative to the working condition on the left side. At this time, the transmission gear 4231 that follows the rotation of the power lifting arm 42 is separated from the ribbon transmission gear 11. At this time, the ribbon drive gear 221 no longer has a meshing transmission relationship with the ribbon transmission gear 11, and the ribbon 22 slows down or stops rotating. Through the change in the shape of the lifting mechanism 41, the power lifting arm 42 hinged to the printing module 2 is driven to rotate with a smaller stroke, realizing the transmission connection and separation of the transmission module 1 and the driving end of the ribbon 22, effectively reducing the overall occupied volume of the thermal transfer printer.

[0049] Optionally, the power lifting arm 42 is provided with a limiting groove 424 arranged along the circumference of the rotating shaft, and the printing module 2 is provided with a limiting protrusion 23 extending into the limiting groove 424. Exemplarily, by providing the limiting protrusion 23 and the limiting groove 424 structure that cooperate with each other, the rotation stroke of the power lifting arm 42 is limited and guided, so as to prevent the power lifting arm 42 from overtravel and separation from the lifting mechanism 41, thereby improving the overall operation stability.

[0050] Optionally, the ribbon drive gear 221 is coaxially connected with the ribbon drive shaft 222, and a limiting mechanism 223 is sleeved on the ribbon drive shaft 222, and the limiting mechanism 223 is used to limit the unidirectional rotation of the ribbon 22. Exemplarily, in an embodiment of the present invention, the printing module 2 provides a winding position for the ribbon 22 and drives the roller structure of the ribbon 22 to rotate. When the ribbon drive gear 221 is disengaged from the meshing transmission with the ribbon transmission gear 11, it no longer has the driving force to cause the ribbon 22 to slow down or stop rotating. At this time, the ribbon 22 has not been completely separated from the workpiece to be printed, and the workpiece to be printed is always in a feeding state driven by the transmission module 1. At this time, the ribbon 22 may roll back driven by the workpiece to be printed, resulting in the print head 21 pressing down the section of the ribbon 22 that has been printed and the coating has been consumed onto the workpiece to be printed when entering the printing state again, resulting in the failure or unclear printing of the section. By arranging a limiting mechanism 223, such as a one-way bearing, on the ribbon drive shaft 222, the ribbon drive shaft 222 can be prevented from reversing when subjected to reverse driving forces such as the friction of the workpiece to be printed, thereby preventing the ribbon 22 from rolling back and ensuring subsequent printing quality.

[0051] For example, in other possible implementations, the limiting mechanism 223 may also be other structures that may achieve locking of the ribbon drive shaft 222, such as a locking ring controlled by other electrical control structures, etc., and the embodiments of the present invention are not limited to this.

[0052] Optionally, the lifting mechanism 41 is a first eccentric wheel 41a rotatably installed in the thermal transfer printer, and the first eccentric wheel 41a is in contact with the first lifting end 421. Exemplarily, in the embodiment of the present invention, the first eccentric wheel 41a structure is used as the lifting mechanism 41, which can drive the power lifting arm 42 to rotate periodically around its hinged shaft through its own rotation and contact with the first lifting end 421, so as to switch back and forth between its rotation strokes. According to the actual working conditions, the first eccentric wheel 41a is driven by an additional power source in the transmission module 1 for a small stroke, so as to realize the periodic switching control of the rotation mode of the ribbon 22, and effectively improve the working efficiency.

[0053] Exemplarily, the lifting mechanism 41 using the first eccentric wheel 41a as the power control side for controlling the rotation of the ribbon 22 is the optimal solution provided by the embodiment of the present invention in combination with space occupation, working integrity and synchronization, and overall power consumption. In other possible implementations, the lifting mechanism 41 can also be a standard drive structure such as a cylinder, an electric cylinder, and a telescopic rod that directly cooperates with the power lifting arm 42 as a relay structure. As long as it can achieve contact with the first lifting end 421 of the power lifting arm 42 and drive the first driving end 422 to realize the supply and disconnection of the driving force of the ribbon driving gear 221, the present invention does not limit this.

[0054] Optionally, a displacement lifting arm 43 is provided above the lifting mechanism 41, and the displacement lifting arm 43 includes a second lifting end 431 cooperating with the lifting mechanism 41 and a second driving end 432 cooperating with the printing module 2. The lifting mechanism 41 switches the ribbon 22 to approach and move away from the workpiece to be printed by driving the displacement lifting arm 43. Exemplarily, in the embodiment of the present invention, by providing the displacement lifting arm 43 as a relay structure as a relay transmission member between the lifting mechanism 41 and the printing module 2, its modular setting can facilitate timely replacement when it is aged or damaged after long-term operation, thereby improving the overall service life.

[0055] Optionally, the second drive end 432 is connected to the print head 21. Exemplarily, in the embodiment of the present invention, the second drive end 432 of the displacement lifting arm 43 is connected to the print head 21, so that the lifting and lowering of the print head 21 can be realized under the lifting drive of the lifting mechanism 41, thereby releasing or pressing down the ribbon 22 below to realize displacement driving. In other possible implementation methods, the second drive end 432 can also be directly connected to the printing module 2 to realize overall lifting and lowering, and a flexible connection can be realized according to the internal structure and space of the shell of the thermal transfer printer. The embodiment of the present invention does not limit this, as long as the lifting and displacement of the print head 21 can be realized to adjust the distance between the ribbon 22 and the printed workpiece.

[0056] Specifically, in an embodiment of the present invention, bracket ear plates 211 are provided on both sides of the print head 21, and the lifting mechanism 41 adjusts the posture of the displacement lifting arm 43 by contacting the second lifting end 431 to drive the second driving end 432 to lift the bracket ear plate 211, or separate from the bracket ear plate 211, thereby performing independent displacement lifting control on the print head 21.

[0057] Optionally, a reset spring 212 fixedly connected to the inside of the thermal transfer printer is provided on the top of the print head 21. Exemplarily, in an embodiment of the present invention, under normal working conditions, the print head 21 always maintains contact with the ribbon 22 under the abutment of the reset spring 212 to ensure that printing can be implemented immediately after heating. When lifted by the lifting mechanism 41 and the displacement lifting arm 43, the reset spring 212 is compressed by the abutment. When printing is required again, the lifting mechanism 41 and the displacement lifting arm 43 release the lifting of the print head 21 through displacement adjustment. The print head 21 will automatically and quickly reset under the elastic force of the reset spring 212 and quickly switch to the printing state with the ribbon 22, thereby improving the response sensitivity of the mode switching.

[0058] Optionally, the lifting mechanism 41 is a second eccentric wheel 41b rotatably mounted in the thermal transfer printer, the displacement lifting arm 43 is rotatably connected in the thermal transfer printer, the second eccentric wheel 41b is in contact with the second lifting end 431, and under the rotation of the second eccentric wheel 41b, the movement directions of the second driving end 432 and the second lifting end 431 are opposite.

[0059] Illustratively, in an embodiment of the present invention, a second eccentric wheel 41b structure is used as the lifting mechanism 41, which can drive the displacement lifting arm 43 to rotate periodically around its rotating axis by using its irregular outer arc surface to contact the second lifting end 431, thereby switching back and forth between its rotation strokes. According to actual working conditions, the second eccentric wheel 41b can be driven by a small stroke through an additional power source in the transmission module 1, so as to realize the lifting and lowering displacement adjustment of the print head 21, and the final response is the periodic switching control of the relative position mode of the ribbon 22 and the printed workpiece, thereby effectively improving work efficiency.

[0060] Exemplarily, the lifting mechanism 41 that uses the second eccentric wheel 41b as the control ribbon 22 and the orientation control side of the workpiece to be printed is the optimal solution provided by the embodiment of the present invention in terms of space occupation, working integrity and synchronization, and overall power consumption. In other possible implementations, the lifting mechanism 41 can also be a standard drive structure such as a cylinder, an electric cylinder, and a telescopic rod that directly cooperates with the displacement lifting arm 43 as a relay structure. As long as it can achieve contact with the second lifting end 431 of the displacement lifting arm 43 and drive the second driving end 432 to achieve the lifting and lowering adjustment of the position of the print head 21, the present invention does not limit this.

[0061] Optionally, the transmission module 1 further comprises a transmission mechanism 12, the lifting mechanism 41 comprises a first eccentric wheel 41a and a second eccentric wheel 41b, the transmission mechanism 12 is connected to the first eccentric wheel 41a and the second eccentric wheel 41b in transmission connection, so as to control the first eccentric wheel 41a to drive the driving end of the ribbon 22 in the printing module 2 to be connected to or disconnected from the transmission module 1, and the second eccentric wheel 41b drives the ribbon 22 to approach or move away from the to-be-printed object. Specifically, in the embodiment of the present invention, the transmission mechanism 12 is a mode switching shaft having one end connected to the switching motor, and the first eccentric wheel 41a and the second eccentric wheel 41b are coaxially arranged on the mode switching shaft. Exemplarily, in the embodiment of the present invention, the mode switching shaft independently arranged relative to the ribbon transmission gear 11 and the gear set matched therewith for feeding the to-be-printed object in the transmission module 1 is used as the transmission mechanism 12, and the first eccentric wheel 41a and the second eccentric wheel 41b coaxially arranged thereon are arranged with a preset phase angle deviation. That is, it can be driven to rotate by an independent power source, such as a driving motor m, so that the driving end of the ribbon 22 is connected to the ribbon transmission gear 11 and the ribbon 22 is close to the workpiece to be printed to realize the printing condition; or the driving end of the ribbon 22 is separated and disconnected from the ribbon transmission gear 11 and the ribbon 22 is away from the workpiece to be printed, so that the ribbon 22 stops rotating and moves away from the workpiece to be printed to realize the printing stop condition, thereby completing the optimal mode switching.

[0062] For example, in another possible implementation of the present invention, when the internal space of the shell of the thermal transfer printer allows, the first eccentric wheel 41a and the second eccentric wheel 41b can also be independently controlled by independent mode switching axes. The rotation postures of the first eccentric wheel 41a and the second eccentric wheel 41b are independently and accurately controlled by the host computer or the built-in control structure, thereby improving the response accuracy and the degree of control freedom.

[0063] Optionally, two groups of printing modules 2 are provided along the feeding direction of the workpiece to be printed, and the driving ends of the ribbons 22 of the two groups of printing modules 2 are synchronously driven by the transmission module 1. Exemplarily, in an embodiment of the present invention, multiple groups of printing modules 2 are provided along the feeding direction of the workpiece to be printed, and the driving ends of the ribbons 22 of the multiple groups of printing modules 2 are synchronously driven by the transmission module 1. Specifically, taking the two groups of printing modules 2 provided in the embodiment of the present invention as an example, the power supply for the rotational displacement of the ribbons 22 in the two groups of printing modules 2 relative to the workpiece to be printed. The overall power supply is realized through the driving wheel 14 driven by the motor, and the gear group structure composed of gears cooperates with the belt to realize the integrated transmission, which is reflected in that the ribbon transmission gears 11 corresponding to the position of the printing module 2 can realize synchronous rotation under the power supply of the driving wheel 14, so as to ensure that the transmission rollers 13 on both sides of each printing area a can keep rotating at the same time, so as to realize the stable feeding of the workpiece to be printed.

[0064] Optionally, the transmission module 1 is also used to: when the printing task is completed, the to-be-printed piece is transmitted from the printing area a to the starting position or input end of the printing area a. Exemplarily, when the to-be-printed piece of the thermal transfer printer completes a printing task, the printed paragraph output from the output end of the last printing area a will be cut and removed. When performing the next printing task, if there are multiple printing areas a, and the next printing task only needs to use the printing module 2 in the printing area a that is forward in the feeding direction to perform the printing work, the blank to-be-printed piece in the printing area a that is backward in the feeding direction will be fed in an unprinted state and output from the output end, thereby causing waste of consumables. In an embodiment of the present invention, after receiving the next printing task, the transmission module 1 can drive the to-be-printed piece that is relocated at the output end of the last printing area a of the previous printing task to retreat under the instruction control of the host computer or the control device, retreat to the revelation position of the printing area a that needs to be printed for the first time for the next printing task, or the input end of the first printing area a, and then forward feed, thereby further reducing the waste of consumables.

[0065] Optionally, the transmission mechanism 12 is provided with two mode switching shafts, and the two mode switching shafts are used to respectively control the working state switching of the two printing modules 2. Exemplarily, in the embodiment of the present invention, two mode switching shafts are respectively provided corresponding to the two printing areas, and the first eccentric wheel 41a and the second eccentric wheel 41b are respectively coaxially provided thereon, and the two are driven to rotate by independent power sources to realize the rotation of the ribbon 22 in different printing areas a and the respective switching of the displacement state relative to the workpiece to be printed.

[0066] Optionally, the power clutch components 4 in the two groups of state switching modules 3 are synchronously driven. Further, in a preferred embodiment of the present invention, the power clutch components 4 in the two groups of state switching modules 3 are synchronously driven by the same power source. Specifically, the mode switching shafts corresponding to the two printing areas a are provided with transmission gears on the same side, and are synchronously rotated under an external driving force by a belt, so that the same external power source can simultaneously control the printing modules 2 in multiple printing areas a to achieve mode switching.

[0067] For example, in the embodiment of the present invention, in the clutch assembly 4 of the state switching module 3 corresponding to the front and rear printing areas a, there is an angle phase difference of 90° between the first eccentric wheels 41a on the two mode switching shafts and between the second eccentric wheels 41b on the two mode switching shafts. Through the phase difference setting of the lifting mechanism 41, while realizing synchronous transmission control of the two clutch assemblies 4 using the same power source, the mode periodic change of the printing module 2 in the front and rear printing areas a can be realized, so that the thermal transfer printer has four different working states.

[0068] like Fig.11 and Fig.12 As shown, taking the feeding direction from right to left as an example, the right printing module 2 and clutch assembly 4 correspond to the first printing area a, and the left printing module 2 and clutch assembly 4 correspond to the second printing area a. It can be seen that in the first working condition, the print head 21 in the first printing area a is lifted, and the driving end of the ribbon 22 is separated and disconnected from the ribbon transmission gear 11, and the area is in a non-working state; while the print head 21 in the second printing area a is pressed down, and the driving end of the ribbon 22 is meshed with the ribbon transmission gear through the transmission gear set, and the ribbon 22 will rotate relative to the to-be-printed object under the drive of the ribbon transmission gear 11, and the printing area a is in a printing condition.

[0069] like Fig.13 and Fig.14 As shown, in the second working condition after the first working condition, the two mode switching shafts rotate 90° clockwise under the synchronous drive of the same power source, at which time the print heads 21 in the two printing areas a are both in a lifted state, and the driving ends of the ribbon 22 are separated and disconnected from the ribbon drive gear 11. Both printing areas a are in a non-working state.

[0070] like Fig.15 and Fig.16 As shown, in the third working condition after the second working condition, the two mode switching shafts rotate 90° clockwise again under the synchronous transmission of the same power source. At this time, the print head 21 in the first printing area a is pressed down, and the driving end of the ribbon 22 is engaged with the ribbon transmission gear through the transmission gear set. The ribbon 22 will rotate relative to the to-be-printed workpiece driven by the ribbon transmission gear 11, and the printing area a is in the printing condition; and the print head 21 in the second printing area a is lifted, and the driving end of the ribbon 22 is separated and disconnected from the ribbon transmission gear 11, and the area is in a non-working state.

[0071] like Fig.17 and Fig.18 As shown, in the fourth working condition after the third working condition, the two mode switching shafts rotate 90° clockwise under the synchronous transmission of the same power source. At this time, the print heads 21 in the two printing areas a are in a downward state, and the driving ends of the ribbon 22 are meshed with the ribbon transmission gear through the transmission gear set. The ribbon 22 will rotate relative to the workpiece to be printed under the drive of the ribbon transmission gear 11, and the two printing areas a are in the printing condition.

[0072] Afterwards, the two mode switching shafts will rotate 90° clockwise again under the synchronous transmission of the same power source and return to the first working condition to complete the cycle.

[0073] Optionally, the transmission module 1 includes transmission rollers 13 disposed on both sides of the printing area a, and in the feeding direction of the workpiece to be printed, the linear speed of the transmission roller 13 located on the output end side is greater than the linear speed of the transmission roller 13 located on the input end side. Exemplarily, in the embodiment of the present invention, in the feeding direction of the workpiece to be printed, the linear speed of the previous transmission roller 13 driving the workpiece to be printed to feed is less than the linear speed of the next transmission roller 13, so that when the next power-driven transmission roller 13 is rolled, the workpiece to be printed between it and the previous power-driven transmission roller 13 is always in a stretched state, so as to avoid the workpiece to be printed from being wrinkled during the feeding process and reduce the waste of consumables.

[0074] Optionally, a paper feed channel 5 is provided in the printing area a along the feeding direction of the workpiece to be printed, and the paper feed channel 5 is used to limit and guide the upper and lower sides of the workpiece to be printed. Exemplarily, in an embodiment of the present invention, in order to make the workpiece to be printed more smoothly feed in multiple printing areas a and avoid obstruction of its front edge, a rigid paper feed channel 5 is provided in the feeding direction, and the rigid paper feed channel 5 is composed of an upper limit plate 51 and a lower limit plate 52 made of hard material. Thus, the feeding route of the workpiece to be printed is limited and guided by the upper and lower sides, effectively avoiding the workpiece to be printed from sticking to the ribbon 22 in the rear printing module 2 due to a small amount of self-adhesive mucus seeping out of the front edge or the irregular front edge (with burred edge or slightly curved front edge shape), resulting in the ribbon 22 being scratched or brought out, and other printing failures.

[0075] Optionally, an opening structure for communicating with the side is provided on the paper feeding channel 5. Exemplarily, in the embodiment of the present invention, the opening structure refers to the upper limit plate 51 of the paper feeding channel 5 and the inner shell of the thermal transfer printer being connected in a rotating manner. When not working, the user can remove part of the shell and flip up the upper limit plate 51 located at the top to clean the inside of the paper feeding channel 5 and the lower limit plate 52, remove possible adhesive mucus, and ensure the stability of subsequent printing work.

[0076] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0077] The above descriptions are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving thermal transfer printer, characterized in that: It includes a transmission module (1), a printing module (2), and a state switching module (3). The transmission module (1) is used to transmit the workpiece to be printed from the input end to the printing area (a), and from the printing area (a) to the output end; The printing module (2) is arranged in the printing area (a) and is used for printing on a workpiece to be printed, the printing module (2) comprising a printing head (21) and a ribbon (22) arranged around the printing head (21); The state switching module (3) comprises a power clutch component (4) for switching the working state of the printing module (2): The printing module (2) is driven to be in transmission connection with the transmission module (1) via the power clutch assembly (4), so that the ink ribbon (22) and the workpiece to be printed rotate synchronously; The printing module (2) is driven to separate from the transmission module (1) by the power clutch assembly (4), so that the moving speed of the ink ribbon (22) is lower than the moving speed of the workpiece to be printed or the ink ribbon (22) stops rotating.

2. The energy-saving thermal transfer printer according to claim 1, characterized in that: The state switching module (3) is used to switch the working state of the printing module (2), and further comprises: The power clutch assembly (4) drives the ink ribbon (22) to approach the workpiece to be printed; The power clutch assembly (4) drives the ink ribbon (22) away from the workpiece to be printed.

3. The energy-saving thermal transfer printer according to claim 2, characterized in that: The power clutch assembly (4) drives the printing module (2) to be transmission-connected with the transmission module (1) via the driving end close to the color ribbon (22); and the power clutch assembly (4) drives the printing module (2) to be separated from the transmission module (1) via the driving end far from the color ribbon (22).

4. The energy-saving thermal transfer printer according to claim 3, characterized in that: The power clutch assembly (4) comprises a lifting mechanism (41), wherein the lifting mechanism (41) is used to drive the printing module (2) to be connected to or separated from the transmission module (1), or to drive the ribbon (22) to move closer to or farther away from the object to be printed.

5. The energy-saving thermal transfer printer according to claim 4, characterized in that: A power lifting arm (42) is arranged above the lifting mechanism (41), and the power lifting arm (42) comprises a first lifting end (421) cooperating with the lifting mechanism (41) and a first driving end (422) cooperating with the driving end of the ribbon (22). The lifting mechanism (41) switches the transmission connection and separation between the transmission module (1) and the driving end of the ribbon (22) by driving the power lifting arm (42).

6. The energy-saving thermal transfer printer according to claim 5, characterized in that: The transmission module (1) comprises a ribbon transmission gear (11), and the driving end of the ribbon (22) comprises a ribbon driving gear (221). Under the drive of the lifting mechanism (41), the ribbon driving gear (221) engages with or disengages from the ribbon transmission gear (11).

7. The energy-saving thermal transfer printer according to claim 6, characterized in that: The first driving end (422) is provided with a transmission gear set (423), and the transmission gear set (423) includes at least one transmission gear (4231). Under the drive of the lifting mechanism (41), the ribbon driving gear (221) is meshed with or disengaged from the transmission gear (4231).

8. The energy-saving thermal transfer printer according to claim 7, characterized in that: The transmission gear set (423) includes at least two mutually meshing transmission gears (4231); the power lifting arm (42) is hinged to the printing module (2); and the rotating shaft through which the power lifting arm (42) and the printing module (2) are hinged is the rotating shaft of one of the transmission gears (4231) in the transmission gear set (423).

9. The energy-saving thermal transfer printer according to claim 8, characterized in that: The power lifting arm (42) is provided with a limiting groove (424) arranged along the circumference of the rotating shaft, and the printing module (2) is provided with a limiting protrusion (23) extending into the limiting groove (424).

10. The energy-saving thermal transfer printer according to claim 6, characterized in that: The ribbon driving gear (221) is coaxially connected to a ribbon driving shaft (222), and a limiting mechanism (223) is sleeved on the ribbon driving shaft (222), wherein the limiting mechanism (223) is used to limit the unidirectional rotation of the ribbon (22).

11. The energy-saving thermal transfer printer according to claim 10, characterized in that: The limiting mechanism (223) is a one-way bearing.

12. The energy-saving thermal transfer printer according to claim 5, characterized in that: The lifting mechanism (41) is a first eccentric wheel (41a) rotatably mounted in the thermal transfer printer, and the first eccentric wheel (41a) is in contact with the first lifting end (421).

13. The energy-saving thermal transfer printer according to claim 12, characterized in that: A displacement lifting arm (43) is arranged above the lifting mechanism (41); the displacement lifting arm (43) comprises a second lifting end (431) cooperating with the lifting mechanism (41) and a second driving end (432) cooperating with the printing module (2); the lifting mechanism (41) switches the ribbon (22) to approach or move away from the workpiece to be printed by driving the displacement lifting arm (43).

14. The energy-saving thermal transfer printer according to claim 13, characterized in that: The second driving end (432) is connected to the print head (21).

15. The energy-saving thermal transfer printer according to claim 14, characterized in that: Support ear plates (211) are provided on both sides of the print head (21), and the lifting mechanism (41) contacts the second lifting end (431) to drive the second driving end (432) to lift the support ear plate (211) or to separate from the support ear plate (211).

16. The energy-saving thermal transfer printer according to claim 15, characterized in that: A return spring (212) is arranged on the top of the print head (21) and is fixedly connected to the inside of the thermal transfer printer.

17. The energy-saving thermal transfer printer according to claim 15, characterized in that: The lifting mechanism (41) is a second eccentric wheel (41b) rotatably mounted in the thermal transfer printer, the displacement lifting arm (43) is rotatably connected in the thermal transfer printer, the second eccentric wheel (41b) is in contact with the second lifting end (431), and when the second eccentric wheel (41b) rotates, the second driving end (432) and the second lifting end (431) move in opposite directions.

18. The energy-saving thermal transfer printer according to claim 17, characterized in that: The transmission module (1) further comprises a transmission mechanism (12), the lifting mechanism (41) comprises a first eccentric wheel (41a) and a second eccentric wheel (41b), the transmission mechanism (12) being transmission-connected to the first eccentric wheel (41a) and the second eccentric wheel (41b) so as to control the first eccentric wheel (41a) to drive the driving end of the ribbon (22) in the printing module (2) to be transmission-connected or disconnected with the transmission module (1), and the second eccentric wheel (41b) to drive the ribbon (22) to approach or move away from the workpiece to be printed.

19. The energy-saving thermal transfer printer according to claim 18, characterized in that: The transmission mechanism (12) is a mode switching shaft having one end connected to a switching motor, and the first eccentric wheel (41a) and the second eccentric wheel (41b) are coaxially arranged on the mode switching shaft.

20. The energy-saving thermal transfer printer according to claim 19, characterized in that: Two groups of the printing modules (2) are arranged along the feeding direction of the workpiece to be printed, and the driving ends of the ribbons (22) of the two groups of the printing modules (2) are synchronously driven by the transmission module (1).

21. The energy-saving thermal transfer printer according to claim 20, characterized in that: The transmission mechanism (12) is provided with two mode switching shafts, and the two mode switching shafts are used to respectively control the switching of the working states of the two printing modules (2).

22. The energy-saving thermal transfer printer according to claim 21, characterized in that: The transmission module (1) comprises transmission rollers (13) arranged on both sides of the printing area (a); in the feeding direction of the workpiece to be printed, the linear speed of the transmission roller (13) located on the output end side is greater than the linear speed of the transmission roller (13) located on the input end side.

23. The energy-saving thermal transfer printer according to claim 22, characterized in that: The printing area (a) is provided with a paper feeding channel (5) arranged along the feeding direction of the workpiece to be printed, and the paper feeding channel (5) is used to limit and guide the upper and lower side surfaces of the workpiece to be printed.

24. The energy-saving thermal transfer printer according to claim 23, characterized in that: The paper feeding channel (5) is provided with an opening structure for communicating with the side.

25. The energy-saving thermal transfer printer according to claim 22, characterized in that: The two sets of transmission modules (1) are driven by belts.

26. The energy-saving thermal transfer printer according to claim 20, characterized in that: The power clutch components (4) in the two groups of state switching modules (3) are driven synchronously.

27. An energy-saving thermal transfer printer according to any one of claims 1 to 26, characterized in that: The printing modules (2) are arranged in a plurality of groups along the feeding direction of the workpiece to be printed, and the driving ends of the ribbons (22) of the plurality of printing modules (2) are synchronously driven by the transmission module (1).

28. An energy-saving thermal transfer printer according to any one of claims 1 to 26, characterized in that: The transmission module (1) is also used to: when the printing task is completed, transmit the workpiece to be printed from the printing area (a) to the starting position of the printing area (a) or the input end.

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