A hot stamp printer and an automatic film placing mechanism thereof

Abstract

The utility model discloses a kind of ironing picture printers and its automatic film placing mechanism, the rear end of the ironing picture printer automatic film placing mechanism is equipped with double-power film collector, double-power film collector is horizontally provided with film roll mounting shaft, further includes: tension rod assembly, it is located between the film roll mounting shaft and the output end, tension rod assembly is parallelly arranged with film roll mounting shaft and located below opposite film roll mounting shaft;Tension rod sliding slot is vertically arranged in the side of tension rod assembly, the groove body of the tension rod sliding slot is along vertical direction arrangement, and tension rod assembly is limited to this utility model with double-power film collector or air inflation shaft is matched with motor to realize automatic film placing, using first tension rod assembly to apply gravity to film to realize to tighten film, reach above-mentioned two effects to realize to solve tympanic membrane, film is easy to shake, film is easy to slip and other problems.

Description

Technical Field

[0001] This utility model relates to the technical field of film-spreading mechanisms, specifically a heat press printer and its automatic film-spreading mechanism. Background Technology

[0002] Currently, heat transfer printers typically refer to printing equipment used to create heat transfer or heat transfer patterns on fabric. During the use of a heat transfer printer, the film feeding mechanism is a very important component, which is a set of equipment used to carry, unfold, and smoothly transport rolls of material.

[0003] Current heat transfer printers rely solely on the forward rolling of the film feed axis to propel the film forward. The film unloader, which holds the film roll in place, cannot automatically feed the film forward. This reliance on the film feed axis, coupled with the film's light weight, easily leads to problems such as film bulging, film vibration, and film slippage. These issues are less common in existing fabric printers or roll-to-roll unloading mechanisms, which generally do not encounter these problems. Furthermore, they typically do not perform large-area, long-span continuous heat transfer printing, and therefore do not consider the film's elasticity. However, if heat transfer printers experience these issues, it can easily reduce printing accuracy, affecting print quality and even resulting in unusable printed products. Utility Model Content

[0004] The purpose of this invention is to provide a heat transfer printer and its automatic film feeding mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An automatic film feeding mechanism for a heat transfer printer, with its film feeding output end as the opposite front end, and a dual-power film take-up device provided at the rear end of the automatic film feeding mechanism, with a film roll mounting shaft horizontally arranged on the dual-power film take-up device, and further comprising: A tension bar assembly is located between the membrane roll mounting shaft and the output end. The tension bar assembly is arranged parallel to the membrane roll mounting shaft and is located below the membrane roll mounting shaft. A tension bar chute is vertically arranged on the side of the tension bar assembly. The entire chute body is arranged vertically and limits the tension bar assembly, allowing the tension bar assembly to move up and down along the chute body. The sensor assembly is configured to detect the position of the tension bar assembly and send a signal that the tension bar assembly has reached the specified position when the tension bar assembly moves to its upper and lower limits.

[0006] Preferably, there are two tension bar grooves, which are symmetrically positioned at both ends of the tension bar assembly and slide and limit the movement of the tension bar assembly.

[0007] Preferably, it further includes a first rack whose extension direction is parallel to the tension bar groove, and a boss gear is coaxially fixed on the tension bar assembly, the boss gear meshing with the first rack.

[0008] Preferably, a set of auxiliary guiding mechanisms is used, with a meshing boss gear and a first rack, and each end of the tension bar assembly is provided with a set of such auxiliary guiding mechanisms.

[0009] Preferably, the sensor assembly includes: The lower limit sensor, which is a photoelectric sensor, is used to detect the lower limit position of the tension bar assembly's stroke and send out a position signal when triggered.

[0010] Preferred options also include: The upper limit sensor, a mechanical sensor, is used to detect the upper limit position of the tension bar assembly's stroke and send a position signal when triggered. The mechanical sensor is connected to the dual-power film take-up device and has a contact head located at the upper limit position of the tension bar assembly's stroke.

[0011] Preferably, the photoelectric sensor is located below the movement trajectory of the tension bar assembly and is configured to detect the vertical travel position of the tension bar assembly.

[0012] Preferably, the tension bar assembly is an air shaft.

[0013] A heat transfer printer includes the automatic film feeding mechanism provided by this utility model and any improvement thereof, the heat transfer printer further includes: A frame, the frame including fixed support rods on both sides; The working head is mounted on the two fixed support rods, and the rear end of the working head is provided with a membrane inlet; The automatic film feeding mechanism of the heat press printer is connected to the frame, and the output end of the film feeding mechanism is connected to the film inlet.

[0014] Preferably, each of the fixed support rods has a base installed at its bottom end, and each base has a stabilizing support mechanism installed at its bottom end. The stabilizing support mechanism monitors the printer's operating status, and if any abnormality is detected during monitoring, it stabilizes the printer through the support end.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a dual-power film take-up device or an air shaft combined with a motor to achieve automatic film release, and uses a first tension rod assembly to apply gravity to the film to tighten it. By achieving the above two effects, it solves problems such as film bulging, film shaking, and film slippage. 2. This utility model can monitor the working end in real time during operation. When an abnormality is detected, it can be dealt with immediately. It increases the contact area between the bottom of the working equipment and the ground, which not only improves the stability of the working process by dealing with the problem in time, but also alerts the staff to abnormalities that occur during the working process by changing the cross-section with the ground. It requires stopping the work for investigation and checking for potential hazards during the working process, thereby improving the stability of the working equipment during operation and avoiding the failure to detect potential hazards in time, which would affect the normal operation of the subsequent work. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure is provided for the embodiments of this utility model; Figure 2 A cross-sectional side view of the structure provided for an embodiment of this utility model; Figure 3 This is a structural diagram of the overall right side view provided for an embodiment of the present utility model; Figure 4 A structural diagram of the first tension bar assembly provided in an embodiment of this utility model; Figure 5 A structural diagram of the idler wheel assembly provided in an embodiment of this utility model; Figure 6 This is a structural diagram of the overall left side view provided for an embodiment of the present utility model; Figure 7 A structural diagram of the air expansion assembly provided in an embodiment of this utility model; Figure 8 This is a structural diagram of the base as shown in the side sectional view of an embodiment of the present utility model; Figure 9 A top view of the fixed elongated frame provided in an embodiment of this utility model; Figure 10 This is a horizontal sectional view of the fixed frame head provided in an embodiment of the present utility model.

[0017] In the diagram: 1. Photoelectric sensor; 2. Sensor mounting plate; 3. First tension bar groove; 4. Mechanical sensor; 5. Film roll mounting shaft; 6. Dual-power film take-up device; 7. Stainless steel round tube; 8. Film take-up device mounting plate; 9. First tension bar assembly; 901. Tension bar outer shaft; 902. First snap ring; 903. Second snap ring; 904. Tension bar inner shaft; 905. First bearing; 906. Boss gear; 907. Second bearing; 10. First rack; 11. Anti-collision rubber head screw. 12. Motor control box; 13. Motor cover; 14. Brushed DC geared motor; 15. Air shaft mounting plate; 16. Motor mounting plate; 17. Idler gear mounting plate; 18. Idler gear assembly; 1801. Helical gear; 1802. Idler gear shaft; 1803. Flange bearing; 1804. Working snap ring; 19. Micro switch protective cover; 20. Micro switch; 21. Gear protective cover; 22. Base; 23. Fixing rod; 24. Working head; 25. Infrared ranging sensor 26. Infrared ranging sensor mounting plate; 27. Second tension rod slide groove; 28. Second rack; 29. ​​Second diaphragm roll; 30. Bearing fixing block; 31. Safety pin with steel ball; 32. Bearing baffle; 33. Air expansion assembly; 3301. Air expansion shaft; 3302. Working bearing; 3303. Helical gear; 3304. Air expansion shaft rod; 3305. Mounting snap ring; 34. Reinforcing square rod; 35. Second tension rod assembly; 36. Screw with anti-collision rubber head; 37. Stabilizing support Support mechanism; 3701, movable support plate; 3702, fixed electromagnetic block; 3703, connecting magnetic plate; 3704, push spring; 3705, movable top rod; 3706, fixed frame head; 3707, movable top rod; 3708, partition plate; 3709, movable block; 3710, pull spring; 3711, fixed long frame; 3712, monitoring circular groove; 3713, movable float plate; 3714, monitoring cylinder; 3715, squeeze touch switch; 3716, movable slot. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1 Please see Figure 1-5 This utility model provides a technical solution: an automatic film feeding mechanism for a heat transfer printer, comprising an output end for feeding the film as the front end, a dual-power film take-up device 6 at the rear end of the automatic film feeding mechanism, a film roll mounting shaft 5 horizontally arranged on the dual-power film take-up device 6, and further comprising: Tension bar assembly 9 is located between the membrane roll mounting shaft 5 and the output end. Tension bar assembly 9 is arranged parallel to the membrane roll mounting shaft 5 and is located below the membrane roll mounting shaft 5. The tension rod groove 3 is vertically arranged on the side of the tension rod assembly 9. The groove body of the tension rod groove 3 is arranged vertically and limits the tension rod assembly 9, so that the tension rod assembly 9 can move up and down along the groove body. The upper end of the film take-up device mounting plate 8 is equipped with a dual-power film take-up device 6. The upper end of the dual-power film take-up device 6 is equipped with an air expansion rod, and a film roll mounting shaft 5 is installed on the outside of the air expansion rod. The right side mounting plate of the film take-up device mounting plate 8 has a movable long plate, and a first tension rod groove 3 is opened in the middle of the movable long plate. The first tension rod groove 3 has a first tension rod assembly 9 in its inner cavity. The first tension rod assembly 9 includes an outer tension rod shaft 901 and an inner tension rod shaft 904. The outer tension rod shaft 901 is sleeved on the outside of the inner tension rod shaft 904. There are two tension rod grooves 3, which are symmetrically located at both ends of the tension rod assembly 9 and slide and limit the movement with the ends of the tension rod assembly 9.

[0020] A mechanical sensor 4 is installed on the front side of the top of the film take-up device mounting plate 8, and a first rack 10 is installed on the left side of the movable long plate. An idler wheel mounting plate 17 is installed on the top of the air shaft mounting plate 15, and the right side of the film roll mounting shaft 5 is connected to the upper end of the idler wheel mounting plate 17. The first tension bar assembly 9 further includes a first retaining ring 902, a second retaining ring 903, a first bearing 905, a boss gear 906, and a second bearing 907. The first bearing 905 is installed on both sides of the inner cavity of the outer shaft 901 of the tension bar. The inner side of the first bearing 905 is connected to the outside of the inner shaft 904 of the tension bar. The second bearing 907 is installed at both ends of the inner shaft 904 of the tension bar. The boss gear 906 is installed at the right end of the inner shaft 904 of the tension bar through the first tension bar slide groove 3. The first retaining ring 902 is installed on the side of the second bearing 907 away from the boss gear 906. The second retaining ring 903 is installed between the side of the first bearing 905 and the inner shaft 904 of the tension bar. It also includes a first rack 10 whose extension direction is parallel to the tension bar groove 3. A boss gear 906 is coaxially fixed on the tension bar assembly 9. The boss gear 906 meshes with the first rack 10. An installation rope is installed on the left side of the first tension bar assembly 9, and the top end of the installation rope is connected to the upper end of one side of the air shaft mounting plate 15. The intermeshing boss gear 906 and the first rack 10 serve as an auxiliary guiding mechanism, and each end of the tension rod assembly 9 is provided with one of the auxiliary guiding mechanisms. The first tension rod assembly 9 is made into a shaft sleeve assembly. During movement, the inner shaft 904 of the tension rod rotates and moves up and down along the predetermined track of the first tension rod slide groove 3, while the outer shaft 901 of the tension rod remains stationary relative to the inner shaft. This can reduce the friction between the tension rod and the printing film and prevent the printing film from being scratched due to friction. The boss gear 906 on the first tension rod assembly 9 meshes with the first rack 10 installed on the first tension rod slide groove 3. The first tension rod assembly 9 can automatically follow the film up and down according to the automatic film feeding speed or the size of the film roll to always keep the film taut.

[0021] The sensor assembly includes: The lower limit sensor, which is a photoelectric sensor 1, is used to detect the lower limit position of the tension rod assembly 9 and send out a position signal when triggered. The sensor mounting plate 2 is installed on the right side of the fixed frame rod 23 on the left. The photoelectric sensor 1 is installed in the middle of the sensor mounting plate 2. The film roll mounting shaft 5 can hold a maximum of 200 meters of film roll. The mechanical sensor 4 is installed on the front side of the top of the film take-up device mounting plate 8. Also includes: The upper limit sensor, which is a mechanical sensor 4, is used to detect the upper limit position of the tension bar assembly 9 and send a position signal when triggered. The mechanical sensor 4 is connected to the dual-power film take-up device 6. The mechanical sensor 4 is provided with a contact head, which is located at the upper limit position of the tension bar assembly 9. The photoelectric sensor 1 is located below the movement trajectory of the tension bar assembly 9 and is further configured to detect the vertical movement position of the tension bar assembly 9. Anti-collision rubber head screws 11 are installed between the right side of the film take-up device mounting plate 8 and the bottom of the movable long plate. A stainless steel round tube 7 is installed on the right side of the film take-up device mounting plate 8, and the right end of the stainless steel round tube 7 is connected to the air shaft mounting plate 15. The mechanical sensor 4, located at the upper limit of the first tension bar assembly 9, is triggered when the film roll is used up. This prevents the last piece of film from sticking to the film tube on the film roll mounting shaft 5, which would prevent the film shortage alarm on the print head 24 from failing to recognize the film shortage state and causing the printer to continue printing in the film shortage state. When film shortage occurs and the film sticks to the film roll mounting shaft 5, the first tension bar assembly 9 will follow the last piece of film to the upper limit and trigger the mechanical sensor 4, causing the printer to automatically stop printing. The photoelectric sensor 1, installed at the lower limit of the first tension bar assembly 9, prevents the film roll mounting shaft 5 from releasing the film too quickly or too much, even when the first tension bar assembly 9 has already fallen to the lower limit, from continuing to release the film, which would cause the film to become taut. When the film is released too quickly or too much, the first tension bar assembly 9 will fall to the lower limit and trigger the photoelectric sensor 1, automatically stopping the film release and keeping the film taut. The mechanical sensor 4 and the photoelectric sensor 1 can also be replaced with other electrical components that have the same effect.

[0022] A motor control box 12 is installed on the upper rear side of the fixed frame rod 23 on the right side. A motor mounting plate 16 is installed on the upper end of the air shaft mounting plate 15. A brushed DC geared motor 14 is installed on the upper end of the motor mounting plate 16. A motor cover 13 is installed on the right side of the brushed DC geared motor 14. The motor control box 12 is electrically connected to the brushed DC geared motor 14. A transmission gear is installed on the output shaft on the left side of the brushed DC geared motor 14. A connecting gear is installed on the right side of the air rod, and the transmission gear and the connecting gear mesh with each other. The brushed DC geared motor 14 is protected by the motor cover 13. When working, the brushed DC geared motor 14 is started to drive the transmission gear to rotate. Through the meshing of the transmission gear and the connecting gear, the air rod is driven to rotate.

[0023] A micro switch 20 is installed on the upper right side of the idler wheel mounting plate 17. A micro switch protective cover 19 is installed on the outside of the micro switch 20. The working head 24 is equipped with a control panel. The mechanical sensor 4, photoelectric sensor 1 and micro switch 20 are electrically connected to the control panel. An idler gear assembly 18 is installed on the left side of the idler gear mounting plate 17, and a gear protective cover 21 is installed on the front side of the top of the air shaft mounting plate 15. The idler gear assembly 18 includes a helical gear 1801, an idler gear shaft 1802, a flange bearing 1803, and a working snap ring 1804. The flange bearing 1803 is installed in the middle of the helical gear 1801, the idler gear shaft 1802 is installed in the middle of the flange bearing 1803, and the working snap ring 1804 is installed between the two sides of the flange bearing 1803 and the outside of the idler gear shaft 1802. The specific implementation method is as follows: An idler gear assembly 18 is installed between the helical gear 1801 on the air expansion rod and the helical gear 1801 on the brushed DC geared motor 14. The idler gear assembly 18 connects the helical gear 1801 on the air expansion rod and the helical gear 1801 on the brushed DC geared motor 14. The idler gear assembly 18 in the middle does no work but can absorb energy fluctuations, reduce vibration, and improve transmission stability, thereby ensuring that the rotation of the air expansion rod is more stable, and thus ensuring that the membrane transmission is more stable.

[0024] Example 2 Please see Figures 1-3 This utility model provides a technical solution: a heat transfer printer, which further includes: The frame includes fixed support rods 23 on both sides; The working head 24 is mounted on the two fixed support rods 23, and the rear end of the working head is provided with a membrane inlet; The automatic film feeding mechanism of the heat press printer is connected to the frame. The output end of the film feeding mechanism is connected to the film inlet. During operation, the film roll is first installed on the film roll mounting shaft 5, and then the film is pulled out, so that it is diagonally downward and passes around the first tension rod assembly 9 and then folds back upward. It extends into the working head 34 through the film inlet to perform printing operations. The working head 24 has two fixed support rods 23 installed on both sides of its bottom end. Each fixed support rod 23 has a base 22 installed at its bottom end, and each base 22 has a stabilizing support mechanism 37 installed at its bottom end. The working head 24 is equipped with a film-carrying central shaft. The film take-up device mounting plate 8 is installed on the rear side of the right fixed support rod 23, and an air shaft mounting plate 15 is installed on the rear side of the right fixed support rod 23.

[0025] Example 3 Please see Figure 2 , Figures 8-10 The present invention provides a technical solution: the stable support mechanism 37 includes a movable support plate 3701, a fixed electromagnetic block 3702, a connecting magnetic plate 3703, a push spring 3704, a movable top rod 3705, a fixed frame head 3706, a fixed long frame 3711, and a movable slot 3716. The bottom end of the base 22 is provided with a movable slot 3716, and the bottom end of the inner cavity of the movable slot 3716 is provided with a fixed long frame 3711. Movable support plates 3701 are provided on both sides of the fixed long frame 3711, and several round beads are equidistantly and movably installed at the bottom end of each movable support plate 3701. A fixed electromagnetic block 3702 is installed at the top of the fixed long frame 3711. A fixed frame head 3706 is installed in the middle of the top of the inner cavity of the movable slot 3716. A connecting magnetic plate 3703 is installed at the bottom of the fixed frame head 3706. Movable push rods 3705 are installed on the front and rear sides of the middle of the top of the fixed long frame 3711 through spring-loaded hinges. The top of the movable push rods 3705 is connected to the front and rear sides of the top of the inner cavity of the movable slot 3716 through spring-loaded hinges. A compressed push spring 3704 is installed on the front and rear sides of the top of the inner cavity of the movable slot 3716. The bottom of the push spring 3704 is connected to the top of the fixed long frame 3711. The stabilizing support mechanism 37 further includes a movable top rod 3707, a partition plate 3708, a movable block 3709, a tension spring 3710, a monitoring groove 3712, a movable float plate 3713, a monitoring cylinder 3714, and a pressure touch switch 3715. Movable grooves are provided on both sides of the fixed long frame 3711. The inner cavity of the fixed long frame 3711 is hollow. A partition plate 3708 is installed in the middle of the inner cavity of the fixed long frame 3711. Movable blocks 3709 are slidably installed on the front and rear sides of the inner cavity of the fixed long frame 3711. A movable top rod 3707 is installed on the side of the movable block 3709 closest to the partition plate 3708 via a spring-loaded hinge. The movable top rod 3707 is located away from the movable block 3709. One end is connected to one side of the movable support plate 3701 via a spring-loaded hinge. A monitoring groove 3712 is provided in the middle of the fixed frame head 3706. A movable float plate 3713 is movably installed at the upper end of the inner cavity of the monitoring groove 3712. Several movable balls are equidistantly installed around the outer perimeter of the movable float plate 3713. Liquid is added to the inner cavity of the monitoring groove 3712. A monitoring cylinder 3714 is installed at the top of the inner cavity of the monitoring groove 3712. Several pressure touch switches 3715 are equidistantly installed around the inner perimeter of the monitoring cylinder 3714. A pressure rod is installed at the top of the movable float plate 3713, and the top of the pressure rod extends into the monitoring cylinder 3714. The pressure rod has a T-shaped cross-section and is made of rubber. When a strong impact occurs during use, the fixed frame head 3706 will be affected, causing the liquid inside the monitoring groove 3712 to slosh, further causing the movable float 3713 to shake. The squeezing rod will then contact the corresponding squeezing touch switch 3715, triggering the fixed electromagnetic block 3702 and directly disconnecting its power supply. This causes the fixed electromagnetic block 3702 to lose its magnetism, resulting in the connection magnetic plate 3703 losing its restraint. Consequently, the fixed long frame 3711 will also lose its restraint, and the compressed push spring 3704 will move the fixed long frame 3711 downwards, causing the movable support plate 3701 to move downwards. Once the movable support plate 3701 separates from the interior of the movable groove 3716, the two movable support plates 3701 will lose their restraint and will then be in a stretched state. The pulling spring 3710 drives the moving block 3709 to move towards the partition 3708. The movement of the moving block 3709 drives the movable top rods 3705 on both sides to move away from the fixed long frame 3711, which in turn pushes the movable support plates 3701 on both sides to move away from the fixed long frame 3711. During operation, the working end can be monitored in real time. When an abnormality is detected, it can be dealt with immediately. This increases the contact area between the bottom of the working equipment and the ground, which not only improves the stability of the working process but also alerts the staff to any abnormalities that occur during the working process by the change in the cross-section with the ground. This allows for the investigation of potential hazards during the working process, improving the stability of the working equipment and preventing potential hazards from being detected in time and affecting the normal operation of the subsequent work.

[0026] Example 4 Please see Figures 5-6 This utility model provides a technical solution: a movable long plate is installed on the front right side of the film take-up device mounting plate 8, and a second tension rod groove 27 is opened in the middle of the movable long plate; an infrared ranging sensor mounting plate 26 is installed on the upper right side of the film take-up device mounting plate 8; an infrared ranging sensor 25 is installed on the outside of the infrared ranging sensor mounting plate 26; a screw 36 with anti-collision rubber head is installed between the front side of the film take-up device mounting plate 8 and the movable long plate; and a second tension rod assembly 35 is installed inside the second tension rod groove 27. The upper end of the film take-up device mounting plate 8 is equipped with a second film roll 29, which can hold a maximum of 300 meters of film roll. A second rack 28 is installed on one side of the movable long plate. A reinforcing square rod 34 is installed at the bottom end of the film take-up device mounting plate 8. An air expansion component 33 is installed in the middle of the second film roll 29. A bearing baffle 32 is installed through the film take-up device mounting plate 8 on the left side of the air expansion component 33. A safety pin 31 with steel balls is installed at the upper end of the bearing baffle 32. A bearing fixing block 30 is installed at the upper end of the bearing baffle 32. The air expansion assembly 33 includes an air expansion shaft 3301, a working bearing 3302, a helical gear 3303, an air expansion rod 3304, and a mounting circlip 3305. The air expansion shaft 3301 is installed on the outside of the air expansion rod 3304. The working bearings 3302 are installed on both sides of the air expansion rod 3304. The helical gears 3303 are installed on both ends of the air expansion rod 3304 on one side of the working bearings 3302. A mounting circlip 3305 is installed between one side of the helical gear 3303 and the air expansion rod 3304. The second membrane roll 29 can be up to 300 meters in size. When used in conjunction with Embodiment 1, it can meet most of the customer’s needs and reduce the limitations in the use process. The principle of automatic membrane feeding of the air expansion component 33 with the brushed DC geared motor 14 is the same as described above. The air expansion shaft 3301 and the brushed DC geared motor 14 are driven by a helical gear 1801. The helical gear 1801 is smoother, quieter and more durable than the spur gear during the transmission process.

[0027] Those skilled in the art should recognize that the membrane roll mounting shaft 5 in this invention includes at least two different implementations. One is that the membrane roll mounting shaft 5 is an independent shaft component. After the external membrane roll is installed, it can be used as an attachment carrier to rotate and unwind the film. The other is that the membrane roll itself already serves as the component function of the membrane roll mounting shaft 5. That is to say, after the membrane roll is purchased, the film that needs to be unwound is pre-wound around the outside of a cylinder. When the two ends of the cylinder are connected and installed with the dual-power film unwinder of this invention, the membrane roll itself can rotate and unwind under traction or external power drive. There is no need to pre-set an additional physical shaft on the original machine.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic film feeding mechanism for a heat transfer printer, wherein the output end of the film feeding mechanism is the opposite front end, and the rear end of the automatic film feeding mechanism is provided with a dual-power film take-up device (6), and a film roll mounting shaft (5) is horizontally arranged on the dual-power film take-up device (6), characterized in that: Also includes: Tension bar assembly (9) is located between the membrane roll mounting shaft (5) and the output end. The tension bar assembly (9) is arranged parallel to the membrane roll mounting shaft (5) and located below the membrane roll mounting shaft (5). Tension bar groove (3) is vertically arranged on the side of tension bar assembly (9). The groove body of tension bar groove (3) is arranged vertically and limits the tension bar assembly (9) so that the tension bar assembly (9) can move up and down along the groove body. The sensor assembly is configured to detect the position of the tension rod assembly (9) and send a signal that the tension rod assembly (9) has reached the specified position when the tension rod assembly (9) moves to its upper and lower limits.

2. The automatic film feeding mechanism of a heat transfer printer according to claim 1, characterized in that: The tension bar groove (3) is two in number, which are symmetrically positioned at both ends of the tension bar assembly (9) and slide and limit the movement of the ends of the tension bar assembly (9).

3. The automatic film feeding mechanism of a heat transfer printer according to claim 2, characterized in that: It also includes a first rack (10) whose extension direction is parallel to the tension bar groove (3), and a boss gear (906) is coaxially fixed on the tension bar assembly (9), and the boss gear (906) meshes with the first rack (10).

4. The automatic film feeding mechanism of a heat transfer printer according to claim 3, characterized in that: The tension rod assembly (9) is provided with an auxiliary guiding mechanism at each end, using a meshing boss gear (906) and a first rack (10).

5. The automatic film feeding mechanism of the heat transfer printer according to any one of claims 1 to 4, characterized in that: The sensor assembly includes: The lower limit sensor, which is a photoelectric sensor (1), is used to detect the lower limit position of the travel of the tension bar assembly (9) and send out a position signal when triggered.

6. The automatic film feeding mechanism of a heat transfer printer according to claim 5, characterized in that: Also includes: The upper limit sensor, which is a mechanical sensor (4), is used to detect the upper limit position of the tension bar assembly (9) and send a position signal to the outside when triggered. The mechanical sensor (4) is connected to the dual-power film take-up device (6). The mechanical sensor (4) is provided with a contact head, which is located at the upper limit position of the tension bar assembly (9).

7. The automatic film feeding mechanism of a heat transfer printer according to claim 6, characterized in that: The photoelectric sensor (1) is located below the movement trajectory of the tension bar assembly (9) and is configured to detect the vertical travel position of the tension bar assembly (9).

8. The automatic film feeding mechanism of a heat transfer printer according to claim 7, characterized in that: The tension bar assembly (9) is an air shaft.

9. A heat transfer printer, characterized in that: Including the automatic film feeding mechanism of the heat transfer printer as described in any one of claims 1 to 8, further comprising: The frame includes fixed support rods (23) on both sides. The working head (24) is mounted on the two fixed support rods (23), and the rear end of the working head (24) is provided with a membrane inlet; The automatic film feeding mechanism of the heat press printer is connected to the frame, and the output end of the film feeding mechanism is connected to the film inlet.

10. A heat transfer printer according to claim 9, characterized in that: Each of the fixed frame poles (23) is equipped with a base (22) at its bottom end, and each of the bases (22) is equipped with a stable support mechanism (37) at its bottom end.

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