CN112277481A

CN112277481A - Double-color thermal transfer printer

Info

Publication number: CN112277481A
Application number: CN202011117028.5A
Authority: CN
Inventors: 周建伟; 谢世森; 徐午波; 杨宝梅
Original assignee: Hangzhou Aipulai Label Manufacturing Co ltd
Current assignee: Hangzhou Aipulai Label Manufacturing Co ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-01-29

Abstract

The invention belongs to the field of printers, and particularly relates to a double-color thermal transfer printer which comprises a shell, a tape module, a cutter module and two independently controlled printing head modules, wherein the printing head modules are positioned between the tape module and the cutter module; the main support is provided with a plurality of pressure adjustment subassemblies towards mounting panel one side, and pressure adjustment subassembly one end supports on the mounting panel. The invention has compact structure, can print double-color effect at one time under the condition of not intermediately adjusting and changing the color band, saves time in operation, can adjust the pressure of the printing head without adjusting the installation position by the arranged printing head module, has simple adjusting process and large adjustable range.

Description

Double-color thermal transfer printer

Technical Field

The invention belongs to the field of printers, and particularly relates to a double-color thermal transfer printer.

Background

Generally, the label is required to be able to withstand time tests, is not deformed for a long time, is required to be stored for a long time, cannot fade, cannot be worn due to contact with a solvent or deform and discolor due to high temperature, and the like, so that a printing medium and a printing material made of special materials are required to ensure the characteristics, a general ink-jet printing technology cannot achieve the characteristics, laser printing cannot achieve the characteristics, a needle printing effect and an original design cannot meet the requirements, and a thermal transfer printing technology appears. The principle of thermal transfer printers is the process of transferring ink from a carbon ribbon medium to paper or film using heat and pressure to transfer the ink to the label as it passes through the print head and platen of the printer. The existing thermal transfer printer has the same working principle and has not been changed in structure for a long time, so that the function is not innovated, and the use is troublesome in many times. For example, a conventional printer can print only one color at a time, and when two-color printing is required, it is time-consuming and labor-consuming to exchange the ink ribbon multiple times. For another example, before printing, the pressure of the print head needs to be adjusted, in the thermal transfer process, once the pressure of the print head is insufficient, the adhesion effect of the printed color is poor (the color is light), and if the pressure is too large, the situation that the adhesive tape and the color ribbon cannot be moved and are blocked is easy to occur.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned deficiencies of the prior art and providing a dual color thermal transfer printer.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a double-color thermal transfer printer comprises a shell, and is characterized in that: the printing head module is arranged in the shell and positioned between the adhesive tape module and the cutter module, a corresponding color ribbon module is arranged above the printing head module, and a transmission module fixed in the shell is arranged below the printing head module; the printing head module comprises a printing head, a main support, side plates arranged on two sides of the main support, and a mounting plate arranged between the side plates and facing the conveying support, wherein the mounting plate is connected to a rotating shaft penetrating through the side plates; one side of the main bracket, which faces the mounting plate, is provided with a plurality of pressure adjusting components, and one end of each pressure adjusting component is abutted against the mounting plate; the ribbon module includes an output roller and a recovery roller secured to the housing.

Furthermore, the pressure adjusting assembly comprises an adjusting screw penetrating through the main support, a U-shaped metal plate which is fixed with the main support and provided with a through hole at one end, an adjusting shaft and a spring, wherein an adjusting hole is formed in one end of the adjusting screw, which is positioned on the outer side of the main support, a threaded rod is arranged at the other end of the adjusting screw, a clamping groove is formed in one end of the threaded rod, which is close to the main support, and a clamping spring of which one side is abutted against the main; the threaded rod is in threaded connection with a square nut which is clamped in the inverted V-shaped metal plate; one end of the adjusting shaft penetrates through the through hole and is located outside the metal plate in the shape of a Chinese character 'ji', a spring sleeved on the threaded rod is arranged between the adjusting shaft and the square nut, one end of the spring is abutted to the adjusting shaft, and the other end of the spring is abutted to the square nut.

Further, the sticky tape module includes guide rail bottom plate, sticky tape, its characterized in that: the guide rail bottom plate is provided with a guide rail assembly, and two ends of the guide rail assembly are respectively provided with a sliding block which is symmetrical in structure and can move relatively along the guide rail assembly with the center of the guide rail assembly; a supporting plate fixed with the bottom plate of the guide rail is arranged above the guide rail assembly in parallel, sliding assemblies with bottoms fixed with the sliding blocks are symmetrically arranged on the supporting plate, a side plate assembly is fixed at the top of each sliding assembly and comprises a clamping assembly and a gear set arranged in the clamping assembly; the adhesive tape is arranged between the side plate assemblies and is in transmission connection with the gear set.

Furthermore, the middle part of the supporting plate is provided with a rotatable transmission gear, the sliding assembly comprises a movable frame which is sleeved on the supporting plate and can move relative to the guide rail assembly, a fixed frame which is arranged at one end of the guide rail assembly and is fixed with the side end plate assembly, an adjusting rod which penetrates through the fixed frame and the movable frame at the same side and is fixedly connected with the movable frame, and an extension structure which is fixed on one side of the movable frame and is meshed with the transmission gear at the inner side, the adjusting rod is movably connected with the fixed frame, a spring is sleeved on the adjusting rod, and the spring is pressed.

Furthermore, a plurality of positioning rods perpendicular to the supporting plate are arranged on the supporting plate, and limit grooves matched with the positioning rods are formed in the extension structure; when the extension structure is arranged on the support plate, the positioning rod passes through the limiting groove.

Furthermore, a protruding structure is arranged on one side, close to the adhesive tape, of the clamping structure.

Furthermore, the transmission module comprises a transmission base and a pair of crawler assemblies which run in the same direction and are arranged on the transmission base, each crawler assembly comprises a crawler plate, a crawler which moves around the crawler plate and an adjusting plate, one end of each adjusting plate is fixed to the inner side of the corresponding crawler plate, and each adjusting plate is arranged on the transmission base; a transmission gear is arranged in the middle of the transmission base and is meshed and connected between the adjusting plates; the transmission base is provided with a driving gear component positioned on one side of the crawler belt component, and the driving gear component comprises a driving motor and a gear set in meshing transmission with the driving motor; an output shaft is arranged between the creeper treads, penetrates through the creeper treads and is in transmission connection with the crawler through a rotating wheel arranged in the creeper treads, and one end of the output shaft is in meshing transmission connection with the gear set; the caterpillar is provided with a plurality of needle-shaped bulges which are vertical to the outer surface of the caterpillar.

Furthermore, a pair of rubber rollers is arranged between the creeper tread, the two rubber rollers are in transmission connection through a belt, and the rubber roller close to the output shaft is in meshing transmission connection with the other end of the output shaft.

Furthermore, a plurality of positioning rods vertical to the transmission base are arranged on the movable base, and limit grooves matched with the positioning rods are formed in the adjusting plate; when the adjusting plate is arranged on the transmission base, the positioning rod passes through the limiting groove.

Furthermore, a pressing plate matched with the crawler and the needle-shaped protrusions is arranged above the crawler assembly.

Compared with the prior art, the invention has the following advantages and effects: the whole structure is compact, the double-color effect can be printed at one time under the condition of not intermediately adjusting and changing the color tape, and the time is saved in operation; the adhesive tape is quickly fixed and automatically stepped, so that the printing process is quick and good in effect; the printing head module can adjust the pressure of the printing head without adjusting the installation position, and has simple adjustment process and wide adjustable range.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a schematic structural view of the embodiment with the outer shell removed.

Fig. 3 is a schematic diagram of an exploded structure of the embodiment with the outer shell removed.

Fig. 4 is a schematic cross-sectional view of an embodiment in operation.

FIG. 5 is a schematic structural view of an embodiment of a tape module.

FIG. 6 is a front view of an embodiment of a tape module.

Fig. 7 is an exploded view of the tape module of the example.

Fig. 8 is a schematic structural diagram of a transmission module in the embodiment.

Fig. 9 is a side view of the transmission module in an embodiment.

Fig. 10 is an exploded view of the transmission module in the embodiment.

Fig. 11 is a schematic diagram of a printhead module according to an embodiment.

Fig. 12 is a side view of a printhead module in a mounting clip.

Fig. 13 is a schematic structural view of a main support portion in the embodiment.

Fig. 14 is a schematic structural view of a pressure regulating assembly in an embodiment.

Fig. 15 is an exploded view of the pressure regulating assembly of the embodiment.

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Examples are given.

As shown in fig. 1-4, the present embodiment includes a housing 1, a tape module 2 for outputting a tape 92 to be printed is disposed beside one end of the housing 1, two print head modules 3 and a cutter module 4 which are independently controlled are sequentially disposed in the housing 1 from a end close to the tape module 2 to a end far away from the tape module 2, a transmission module 5 is disposed below the two print head modules 3, and a corresponding ribbon module is disposed above each print head module 3.

As shown in fig. 5-7, the adhesive tape module 2 includes a guide rail base plate 21, a guide rail assembly 22 is disposed on the guide rail base plate 21, two symmetrical sliders 23 are disposed at two ends of the guide rail assembly 22, and each slider 23 can move along the guide rail assembly 22. The guide rail bottom plate 21 is further provided with a support plate 24 which is positioned right above the guide rail assembly 22, and the support plate 24 is provided with symmetrical sliding assemblies. Each sliding assembly comprises a movable frame 25 sleeved on the supporting plate 24 and fixed at the bottom with the top of the end sliding block 23, a fixed frame 26, an adjusting rod 27 and an extension structure 28. A side plate assembly is fixed on the top of each movable frame 25, the side plate assembly comprises a clamping assembly 291, a gear set 99 and a driving motor 91 connected with the gear set 99 are arranged in the clamping assembly 291 on one side, and the gear set 99 and the driving motor 91 are not arranged in the clamping assembly 291 on the other side. The inner sides (the sides close to the adhesive tape 92) of the two clamping assemblies 291 are provided with protruding structures 293, the adhesive tape 92 is arranged between the two clamping assemblies 291, and the protruding structures 293 are arranged to clamp the adhesive tape 92 to prevent the metal clamping assemblies 291 from damaging the adhesive tape 92 due to over-tightening when clamping the adhesive tape 92. The clamping assembly 291 is provided with a gear set 99 and one side of the driving motor 91 is in transmission connection with the adhesive tape 92, and specifically, the driving motor 91 is used for driving the adhesive tape 92 to rotate through the gear set 99 so as to realize forward rotation (output of the adhesive tape 92) and reverse rotation (winding of the adhesive tape 92) of the adhesive tape 92. In this embodiment, the gear set 99 is in driving connection with the adhesive tape 92 by inserting the adhesive tape 92 through a shaft in meshing transmission with the gear set 99, so as to drive the adhesive tape 92 to rotate. The support plate 24 is provided at the middle thereof with a rotatable transmission gear 241, and the transmission gear 241 is rotated by an external force. The top of the movable frame 25 is fixed to the bottom of the clamping assembly 291, and the bottom of the movable frame 25 is fixed to the corresponding slide block 23, i.e. when the movable frame 25 moves, the slide block 23 moves on the guide rail bottom plate 21. The inner side of the extension structure 28 is provided with a tooth mouth which is meshed with the transmission gear 241 for transmission, and when the extension structure 28 at any end moves, the extension structure 28 at the other end can be driven to move relatively by the transmission gear 241. The adjusting rod 27 is movably connected with the fixed frame 26, the adjusting rod 27 is fixedly connected with the movable frame 25, the adjusting rod 27 is sleeved with a spring 93 positioned between the fixed frame 26 and the movable frame 25, the spring 93 is in a stressed and compressed state, specifically, when the adhesive tape 92 is put in, the side plate assemblies on two sides need to be pulled outwards, and the stress deformation of the spring 93 reaches the maximum at the moment; after the adhesive tape 92 is put in, the side plate assembly is released, the spring 93 recovers to deform to push the movable plates, and the movable plate pushes the extension structure 28 to drive the rotating gear to accelerate the movement of the movable plates at both sides until the two protruding structures 293 clamp the adhesive tape 92.

As shown in fig. 8-10, the transmission module 5 includes a transmission base 51 disposed right below the two print head modules 3, a pair of track assemblies moving in the same direction are disposed on the transmission base 51, each track assembly includes a track plate 52, a track 53 moving around the outer side of the track plate 52, and an adjusting plate 54 having one end fixed to the inner side of the track plate 52, the adjusting plate 54 is disposed on the transmission base 51, and the bottom surface of the adjusting plate 54 is connected to the upper surface of the transmission base 51. The middle part of the upper surface of the transmission base 51 is provided with a transmission gear 241, the inner sides of the two adjusting plates 54 are both meshed with the transmission gear 241, the distance between the two arranged track shoes 52 can be adjusted through the rotation gear, the adjusting mode can be that the transmission gear 241 can be driven by a motor to rotate, the transmission gear 241 is rotated to drive the two adjusting plates 54 to move relatively, so that the distance between the two track shoes 52 is changed, and the two track shoes 52 can be pushed by external force to change the distance between the two track shoes 52 to match with the adhesive tapes 92 with different widths. Each of the caterpillars 53 is provided with a plurality of needle-shaped protrusions 531 perpendicular to the outer surface of the caterpillars 53, and when the adhesive tape 92 is placed on the caterpillars 53, the needle-shaped protrusions 531 are inserted into the positioning holes on both sides of the adhesive tape 92, thereby fixing the adhesive tape 92. A pressing plate 59 matched with the crawler belt 53 and the needle-shaped protrusions 531 is arranged above the crawler belt assembly, and the pressing plate 59 is used for limiting the adhesive tape 92 in the vertical direction and preventing the adhesive tape from being separated from the crawler belt 53. The drive base 51 is provided with a drive gear assembly located on one side of one of the track assemblies. The driving gear assembly includes a driving motor 91 and a gear set 99 in meshing transmission with the driving motor 91. An output shaft 55 is further arranged between the track shoes 52, the output shaft 55 penetrates through the two track shoes 52, a rotating wheel 56 with the axis clamped with the output shaft 55 is arranged at the joint of the track shoes 52 and the output shaft 55, and the rotating wheel 56 can drive the track 53 to rotate when rotating. One end of the output shaft 55 close to the driving gear assembly is in meshed transmission connection with the gear set 99, specifically, the adhesive tape 92 led out from the adhesive tape module 2 enters the transmission module 5 from one end of the housing 1, at this time, the driving gear set 99 is driven by the driving motor 91 to rotate, the output shaft 55 drives the rotating wheel 56 to rotate under the transmission of the gear set 99, and the crawler 53 rotates along with the rotating wheel to drive the adhesive tape 92 fixed on the crawler 53 to step.

A pair of rubber rollers 57 are arranged between the track plates 52, one end of the rubber roller 57 close to the output shaft 55, far away from the driving gear assembly, is in meshed transmission connection with the end of the output shaft 55, and the two rubber rollers 57 are in transmission connection through a belt 58. The rubber roller 57 is provided to enable the transmission module 5 to be matched with the traditional adhesive tape 92 for stepping, that is, when the adhesive tape 92 led out from the adhesive tape module 2 is not provided with a positioning hole, the transmission structure of the adhesive tape 92 can also realize stepping of the adhesive tape 92 by matching the rubber roller 57 with the print head module 3.

As shown in fig. 11-13, the printhead module 3 includes a printhead 31 and a main support 32. Side plates 33 symmetrically arranged are fixed on both sides of the main bracket 32 through screws. A mounting plate 34 is disposed between the side plates 33 and beside the main support 32, a rotating shaft 341 is disposed on the mounting plate 34 and transversely penetrates the mounting plate 34, a transverse slot 331 corresponding to the rotating shaft 341 is formed on each side plate 33, one end of the rotating shaft 341 penetrates the transverse slot 331 on the side plate 33, and the print head 31 is fixed on the outer side surface of the mounting plate 34 and faces the transmission module 5 (adhesive tape 92). In addition, a baffle 35 is fixed on one side of the printing head 31, and the baffle 35 covers the exposed parts of the printing head 31 and the mounting plate 34 on one side of the printing head 31 structure so as to protect the printing head 31. A rotating shaft 36 penetrating through the side plates 33 and located on one side of the main support 32 away from the mounting plate 34 is further disposed between the side plates 33, the rotating shaft 36 is connected to a motor capable of driving the rotating shaft 36 to rotate in the housing 1, and the motor can drive the rotating shaft 36 to rotate so as to drive the print head module 3 to rotate downward toward the side where the print head 31 is disposed, thereby achieving the downward pressing action of the print head 31. The position relationship between the rotating shaft 341 and the transverse slot 331 is set to make the mounting plate 34 and the printing head 31 have a certain position adjusting space in the process of pressing down.

As shown in fig. 14-15, the main support 32 is provided with a plurality of pressure adjustment assemblies on a side facing the mounting plate 34. The pressure adjusting component comprises an adjusting screw 37, a metal plate 38 shaped like a Chinese character 'ji', an adjusting shaft 39, a spring 93 and a square nut 30. Be provided with the regulation hole 371 that is located one end and the threaded rod 372 that is located the other end on the adjusting screw 37, adjusting screw 37 runs through main support 32, is equipped with regulation hole 371 one end and exposes main support 32 and keeps away from mounting panel 34 one side, is equipped with threaded rod 372 one end and is located main support 32 and is close to mounting panel 34 one side, and this threaded rod 372 is close to main support 32 side one end and is provided with the draw-in groove, and the joint has a jump ring 373 that offsets with main support 32 in the draw-in groove, realizes the fixed of the relative main. The metal plate 38 is fixed on one side of the main bracket 32 close to the mounting plate 34 and located outside the threaded rod 372, and a protruding end of the metal plate faces the mounting plate 34, and a through hole 381 through which the front end of the adjusting shaft 39 can pass is formed in the protruding end. The square nut 30 is connected to the threaded rod 372 through threads, and the size of the square nut 30 is matched with the metal plate 38 in the shape of a Chinese character 'ji' and is clamped in the metal plate 38 in the shape of a Chinese character 'ji'. One end of the adjusting shaft 39 penetrates through the through hole 381 and is located outside the metal plate 38 in the shape of a Chinese character 'ji', a spring 93 which is sleeved on the threaded rod 372 and is stressed and compressed is arranged between the adjusting shaft 39 and the square nut 30, one end of the spring 93 abuts against the adjusting shaft 39, the other end of the spring abuts against the square nut 30, and one end of the adjusting shaft 39, which is located outside the metal plate 38 in the shape of a Chinese character 'ji', abuts against the mounting plate 34. In this embodiment, the adjusting hole 371 is an inner hexagonal adjusting hole 371, specifically, the adjusting screw 37 can be rotated through the exposed inner hexagonal adjusting hole 371, after the adjusting screw 37 is rotated, the square nut 30 can only move back and forth along the space in the raised end of the sheet metal in the shape of a Chinese character ji along the thread on the threaded rod 372 due to structural limitation, and the moving process can change the distance between the square nut 30 and the adjusting shaft 39, so as to change the stress condition of the spring 93, that is, when the distance between the square nut 30 and the adjusting shaft 39 is increased, the stress of the spring 93 is decreased, and at this time, the pressure of the adjusting shaft 39 against one side of the mounting plate 34 is decreased; when the distance between the square nut 30 and the adjusting shaft 39 becomes smaller, the spring 93 is stressed to be larger, and the pressure of the adjusting shaft 39 against the mounting plate 34 side becomes larger. In this embodiment, the number of the pressure adjusting assemblies is 4.

In this embodiment, the ribbon modules include an output roller 71 and a recovery roller 72 fixed to the housing 1, each of the printhead modules 3 corresponds to the output roller 71 and the recovery roller 72 thereon, the two ribbon modules work independently, and the output roller 71 is used for guiding out the ribbon sleeved therein, passing through the right below the printhead 31, and then being wound by the recovery roller 72. The cutter module 4 is provided for cutting the adhesive tape 92 on which the two-color printing is completed, for convenience of subsequent use.

The work flow of the double-color thermal transfer printer comprises the following steps: respectively installing an adhesive tape 92 to be printed and two color ribbons with different colors into the adhesive tape module 2 and the color ribbon module, outputting the adhesive tape 92 by the adhesive tape module 2, and cutting the adhesive tape 92 by the cutter module 4 after passing through the two printing head modules 3 through the transmission module 5 and then leading out; when the tape 92 passes through the two print head modules 3, the print head 31 presses down to thermally transfer the ink carried by the corresponding ink ribbon therebelow to the tape 92 positioned therebelow.

In this embodiment, the supporting plate 24 is provided with a plurality of positioning rods 96 perpendicular to the supporting plate 24, and the extension structure 28 is provided with a limiting groove 98 matching with the positioning rods 96. The transmission base 51 is provided with a plurality of positioning rods 96 vertical to the transmission base 51, and the adjusting plate 54 is provided with a limiting groove 98 matched with the positioning rods 96. When the extension structure 28 is disposed on the support plate 24, the positioning rod 96 passes through the retaining slot 98; when the adjustment plate 54 is disposed on the transmission base 51, the positioning rod 96 passes through the limit groove 98. The positioning rod 96 is used for limiting the moving path of the extension structure 28 and the adjusting plate 54, so that the extension structure and the adjusting plate do not have errors on the moving path after long-time work.

The double-color thermal transfer printer has a compact overall structure, can perform one-time printing double-color effect under the condition of not intermediately adjusting and changing the color ribbon, and saves time in operation. This double-colored thermal transfer printer can realize the quick fixed of sticky tape 92, the autonomic step-by-step of sticky tape 92, makes the printing process fast, and is effectual. The printing head module 3 can adjust the pressure of the printing head 31 without adjusting the installation position, the adjusting process is simple, and the adjustable range is wide.

The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A double-color thermal transfer printer comprises a shell, and is characterized in that: the printing head module is arranged in the shell and positioned between the adhesive tape module and the cutter module, a corresponding color ribbon module is arranged above the printing head module, and a transmission module fixed in the shell is arranged below the printing head module;

the printing head module comprises a printing head, a main support, side plates arranged on two sides of the main support, and a mounting plate arranged between the side plates and facing the conveying support, wherein the mounting plate is connected to a rotating shaft penetrating through the side plates;

one side of the main bracket, which faces the mounting plate, is provided with a plurality of pressure adjusting components, and one end of each pressure adjusting component is abutted against the mounting plate; the ribbon module includes an output roller and a recovery roller secured to the housing.

2. The dual-color thermal transfer printer of claim 1, wherein: the pressure adjusting assembly comprises an adjusting screw penetrating through the main support, a U-shaped metal plate which is fixed with the main support and provided with a through hole at one end, an adjusting shaft and a spring, wherein an adjusting hole is formed in one end of the adjusting screw, which is positioned outside the main support, a threaded rod is arranged at the other end of the adjusting screw, a clamping groove is formed in one end of the threaded rod, which is close to the main support, and a clamping spring of which one side is abutted against the main support is; the threaded rod is in threaded connection with a square nut which is clamped in the inverted V-shaped metal plate; one end of the adjusting shaft penetrates through the through hole and is located outside the metal plate in the shape of a Chinese character 'ji', a spring sleeved on the threaded rod is arranged between the adjusting shaft and the square nut, one end of the spring is abutted to the adjusting shaft, and the other end of the spring is abutted to the square nut.

3. The dual-color thermal transfer printer of claim 1, wherein: the sticky tape module includes guide rail bottom plate, sticky tape, its characterized in that: the guide rail bottom plate is provided with a guide rail assembly, and two ends of the guide rail assembly are respectively provided with a sliding block which is symmetrical in structure and can move relatively along the guide rail assembly with the center of the guide rail assembly; a supporting plate fixed with the bottom plate of the guide rail is arranged above the guide rail assembly in parallel, sliding assemblies with bottoms fixed with the sliding blocks are symmetrically arranged on the supporting plate, a side plate assembly is fixed at the top of each sliding assembly and comprises a clamping assembly and a gear set arranged in the clamping assembly; the adhesive tape is arranged between the side plate assemblies and is in transmission connection with the gear set.

4. The dual color thermal transfer printer of claim 3, wherein: the utility model discloses a guide rail assembly's fixed frame, including the fixed frame, the adjustable pole, the extension structure who fixes in adjustable frame one side and inboard and drive gear meshing, adjust pole and mount swing joint, the spring has been cup jointed on adjusting the pole, the spring is pressed between fixed frame and adjustable frame.

5. The dual-color thermal transfer printer of claim 4, wherein: a plurality of positioning rods perpendicular to the supporting plate are arranged on the supporting plate, and limit grooves matched with the positioning rods are formed in the extension structure; when the extension structure is arranged on the support plate, the positioning rod passes through the limiting groove.

6. The dual color thermal transfer printer of any of claims 3-5, wherein: one side of the clamping structure, which is close to the adhesive tape, is provided with a convex structure.

7. The dual-color thermal transfer printer of claim 1, wherein: the crawler assembly comprises a crawler plate, a crawler moving around the crawler plate and an adjusting plate with one end fixed with the inner side of the crawler plate, and the adjusting plate is arranged on the transmission base; a transmission gear is arranged in the middle of the transmission base and is meshed and connected between the adjusting plates; the transmission base is provided with a driving gear component positioned on one side of the crawler belt component, and the driving gear component comprises a driving motor and a gear set in meshing transmission with the driving motor; an output shaft is arranged between the creeper treads, penetrates through the creeper treads and is in transmission connection with the crawler through a rotating wheel arranged in the creeper treads, and one end of the output shaft is in meshing transmission connection with the gear set; the caterpillar is provided with a plurality of needle-shaped bulges which are vertical to the outer surface of the caterpillar.

8. The dual color thermal transfer printer of claim 7, wherein: a pair of rubber rollers is arranged between the creeper tread, the two rubber rollers are in transmission connection through a belt, and the rubber roller close to the output shaft is in meshing transmission connection with the other end of the output shaft.

9. The dual color thermal transfer printer of claim 7, wherein: a plurality of positioning rods vertical to the transmission base are arranged on the movable base, and limit grooves matched with the positioning rods are formed in the adjusting plate; when the adjusting plate is arranged on the transmission base, the positioning rod passes through the limiting groove.

10. The dual color thermal transfer printer of any of claims 7-9, wherein: a pressing plate matched with the crawler and the needle-shaped protrusions is arranged above the crawler assembly.