Printing device and film printer

Abstract

The invention relates to the technical field of printing devices, and discloses a printing device which comprises an installation box body, a sealing bottom plate is fixedly installed at the bottom of the installation box body through screws, and a printing head assembly and a printing roller assembly located below the printing head assembly are arranged on the installation box body. A to-be-printed film is clamped between the printing head assembly and the printing roller assembly, the number of the conveying and cleaning mechanisms is two, and the two conveying and cleaning mechanisms are arranged at the two ends of the mounting box correspondingly. According to the printing device and the film printer, the printing head assembly and the printing roller assembly are arranged on the mounting box body in a sealed mode, the conveying and cleaning mechanism is arranged on the inlet and outlet of the mounting box body, and a servo motor drives a conveying roller to rotate to convey a to-be-printed film and drives two sets of brush cleaning rollers to rotate at the same time; and dust on the surface of the to-be-printed film during conveying is cleaned, so that the surface quality of the to-be-printed film is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of printing devices, in particular to a printing device and a film printer. Background Art

[0002] Medical thermal printers are widely used in hospitals, which greatly facilitates doctors' diagnosis and patients' retention of imaging information and referral. Since medical film imaging is related to the health of patients and the accurate judgment of doctors, high requirements are placed on imaging quality. The thermal printer mechanism is a mechanical and electronic integration, and the imaging quality is affected by many factors. The key factors are: film quality, mechanical exposure and paper feeding mechanism, print head electronic heating element, exposure pressure mechanism, control circuit, and control software, which will have a direct or indirect impact on the final film printing quality.

[0003] In the prior art, when a medical film printer is in use, the film is usually stored in a storage box or other structure, and the film is transported to the print head and the print roller for printing through a grabbing mechanism. However, since the film substrate material is prone to static electricity, the film is prone to adsorb dust in the internal environment of the printer during transportation, affecting the quality of the film, causing the film to be unable to fully contact the print head assembly at a local position, thereby affecting the film imaging quality; in addition, the film is in contact with the print head for a long time during printing, resulting in a high temperature after the film is printed. Due to the limitation of the film material, it has a certain viscosity when the temperature rises. When printing multiple films at a time, the film temperature is high and adhesion is likely to occur, and even deformation of the film image is caused. For this reason, we propose a printing device and a film printer to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a printing device and a film printer to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a printing device, comprising a mounting box, a sealing bottom plate being fixedly mounted on the bottom of the mounting box by screws, a print head assembly and a print roller assembly located below the print head assembly being arranged on the mounting box, a film to be printed being clamped between the print head assembly and the print roller assembly, and further comprising: a conveying and cleaning mechanism, the number of the conveying and cleaning mechanisms being two groups, and the two groups of conveying and cleaning mechanisms being respectively arranged at two ends of the mounting box;

[0006] The conveying and cleaning mechanism includes a mounting frame and a mounting cavity arranged at one end of the mounting frame, wherein two upper and lower rows of conveying rollers are arranged inside the mounting frame, a servo motor is fixedly installed on one side of the mounting frame for providing power for the rotation of the conveying rollers, and a synchronous transmission assembly and a transmission gear are arranged on the other side for transmission connection of a plurality of conveying rollers, two groups of mirror-image-distributed brush cleaning rollers are arranged inside the mounting cavity, a reduction transmission assembly is arranged at one end of the mounting cavity for transmission connection of the brush cleaning rollers and the conveying rollers, top pressure sealing assemblies are arranged at both ends of the mounting cavity for adjusting the position of the top pressure sealing assemblies, a plurality of cleaning shifting teeth are arranged on the inner wall of the mounting cavity, and an exhaust assembly is arranged on the outside.

[0007] Preferably, the mounting frame is inserted into the interior of the mounting box, a flange is provided at the contact position between the mounting frame and the mounting cavity, and the mounting frame and the mounting cavity are fixedly mounted on the mounting box through the flange, a conveying port is provided on the side of the mounting cavity away from the mounting frame, and a protective shell that cooperates with the synchronous transmission assembly is provided on the mounting cavity, the synchronous transmission assembly can be protected by the protective shell, and the connection position between the mounting cavity and the mounting box is sealed.

[0008] Preferably, the positions of the upper and lower rows of conveying rollers in the mounting frame correspond one to one, and the spacing between the upper and lower rows of conveying rollers is adapted to the thickness of the film to be printed. By cooperating with each other, a plurality of conveying rollers in the mounting frame can stably clamp the film to be printed, thereby stably and precisely conveying the film to be printed when the conveying rollers rotate.

[0009] Preferably, there are two groups of synchronous transmission components in the conveying and cleaning mechanism, and the synchronous transmission components include a group of synchronous transmission toothed belts and a plurality of synchronous transmission gears. The synchronous transmission gears are fixedly sleeved on one end of the conveying roller, and the synchronous transmission toothed belts are meshingly sleeved on the outside of the synchronous transmission gears. The transmission is transmitted through the synchronous transmission gears and the synchronous transmission toothed belts to ensure the transmission effect and avoid slipping.

[0010] Preferably, there are two groups of transmission gears in the conveying and cleaning mechanism. The two groups of transmission gears are fixedly sleeved on the ends of two groups of conveying rollers that are far away from the mounting cavity and distributed up and down. The two groups of transmission gears are meshed with each other, and transmission is carried out through the transmission gears so that the upper and lower rows of conveying rollers rotate in opposite directions, thereby realizing the conveyance of the film to be printed.

[0011] Preferably, the reduction transmission assembly includes a group of driving gears, driven gears and a transmission chain. The driving gear is fixedly sleeved on the end of a group of conveying rollers close to the mounting cavity, the driven gear is fixedly sleeved on the end of the brush cleaning roller, and the transmission chain is meshingly sleeved on the outside of the driving gear and the driven gear. The diameter of the driving gear is one half to one third of the diameter of the driven gear, which can reduce the rotation speed of the brush cleaning roller, so that there is a speed difference between the rotation of the brush cleaning roller and the movement of the film to be printed, thereby improving the cleaning effect of the film to be printed.

[0012] Preferably, the top pressure sealing assembly includes a connecting ring, an arc-shaped guide shaft, a compression spring, a positioning plate and an arc-shaped adjustment groove, the connecting ring is movably sleeved on one end of the brush cleaning roller, the arc-shaped guide shaft is fixedly connected to the connecting ring, the positioning plate is fixedly installed on the mounting cavity, and the arc-shaped guide shaft is plugged into the positioning plate, the compression spring is movably sleeved on the arc-shaped guide shaft, the arc-shaped guide shaft is opened on the mounting cavity and cooperates with the brush cleaning roller, when the conveying of the film to be printed is completed, the two groups of brush cleaning rollers are closed by the elastic force of the compression springs, and the conveying port of the mounting cavity can be closed, thereby realizing the overall closure of the device to prevent dust from affecting the print head assembly and the print roller assembly.

[0013] Preferably, the cleaning teeth are located on one side of the inner wall of the installation cavity close to the installation frame, and a plurality of cleaning teeth are staggered inside the installation cavity. Since the cleaning teeth are in contact with the brush cleaning roller, the cleaning teeth are staggered to allow gas to pass through both sides of the cleaning teeth, making it easier for the vacuum assembly to perform suction.

[0014] Preferably, the air extraction component includes an air extraction manifold and an air extraction fan. The air extraction manifold is fixedly connected to the installation cavity, and the connection position between the air extraction manifold and the installation cavity is located on one side of the cleaning tooth. The air extraction manifold is fixedly connected to an air duct, and the air extraction fan is fixedly installed on one side of the installation box. The air inlet of the air extraction fan is fixedly connected to the air duct, and a dust filter bag is provided on the air outlet. The dust-containing air in the installation cavity is extracted through the air extraction component to prevent the dust-containing air from escaping to the inside of the installation box. At the same time, the cleanliness of the brush cleaning roller is ensured, thereby improving the cleaning effect of the brush cleaning roller on the air extraction component.

[0015] A film printer comprises a mounting box, a sealing bottom plate, a print head assembly, a print roller assembly and a conveying and cleaning mechanism.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The printing device and the film printer are provided with a seal that a print head assembly and a print roller assembly are arranged on a mounting box, and a conveying and cleaning mechanism is arranged on the inlet and outlet of the mounting box. The conveying roller is driven by a servo motor to rotate to convey the film to be printed, and at the same time, two groups of brush cleaning rollers are driven to rotate, so that dust on the surface of the film to be printed during transportation is cleaned, thereby improving the surface quality of the film to be printed and preventing dust adhesion from affecting the image quality. At the same time, the speed reduction transmission assembly is transmitted between the conveying roller and the brush cleaning roller, so that the rotation speed of the brush cleaning roller can be reduced, so that there is a speed difference between the rotation of the brush cleaning roller and the movement of the film to be printed, thereby improving the cleaning effect of the film to be printed.

[0018] 2. The printing device and the film printer are provided with cleaning teeth in the installation cavity. When the brush cleaning roller rotates, the cleaning teeth can move the brush cleaning roller to make the dust cleaned from the surface of the brush cleaning roller fall off, and the dust-containing air in the installation cavity is extracted through the exhaust component to prevent the dust-containing air from escaping into the installation box. At the same time, the cleanliness of the brush cleaning roller is ensured, and the cleaning effect of the brush cleaning roller on the exhaust component is improved.

[0019] 3. The printing device and the film printer are provided with a top pressure sealing assembly cooperating with the brush cleaning roller at the end of the installation cavity. When the film to be printed is conveyed, the elastic force of the compression spring can be overcome to open the two groups of brush cleaning rollers, thereby realizing stable conveyance of the film to be printed. When the conveyance of the film to be printed is completed, the two groups of brush cleaning rollers are closed by the elastic force of the compression spring, and the conveying port of the installation cavity can be closed, thereby realizing the overall closure of the device and preventing dust from affecting the print head assembly and the print roller assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure after the overall combination of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the cross section of the installation box in the present invention;

[0022] Figure 3 It is a structural schematic diagram of the conveying and cleaning mechanism of the film to be printed in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the cross section of the mounting frame and the mounting cavity in the present invention;

[0024] Figure 5 It is a structural schematic diagram of the installation position of the cleaning pick gear in the present invention;

[0025] Figure 6 It is a structural schematic diagram of one end of the installation cavity in the present invention;

[0026] Figure 7 It is a structural schematic diagram of the top pressure sealing assembly in the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the air extraction component in the present invention.

[0028] In the figure: 1. Installation box; 2. Sealing bottom plate; 3. Print head assembly; 4. Print roller assembly;

[0029] 5. Conveying and cleaning mechanism; 51. Mounting frame; 52. Mounting cavity; 53. Conveying roller; 54. Synchronous transmission assembly; 55. Servo motor; 56. Exhaust assembly; 561. Exhaust manifold; 562. Air duct; 563. Exhaust fan; 564. Dust filter bag; 57. Brush cleaning roller; 58. Cleaning teeth; 59. Top pressure sealing assembly; 591. Connecting ring; 592. Arc guide shaft; 593. Compression spring; 594. Positioning plate; 595. Arc adjustment groove; 510. Reduction transmission assembly; 511. Protective shell; 512. Transmission gear; 6. Film to be printed. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 8 In an embodiment of the present invention, a printing device includes a mounting box 1, a sealing bottom plate 2 is fixedly installed on the bottom of the mounting box 1 by screws, a print head assembly 3 and a print roller assembly 4 located below the print head assembly 3 are arranged on the mounting box 1, a film 6 to be printed is clamped between the print head assembly 3 and the print roller assembly 4, and also includes: a conveying and cleaning mechanism 5, the number of the conveying and cleaning mechanism 5 is two groups, and the two groups of conveying and cleaning mechanisms 5 are respectively arranged at both ends of the mounting box 1; the print head assembly 3 and the print roller assembly 4 are sealed and arranged on the mounting box 1, and the conveying and cleaning mechanism 5 is arranged on the inlet and outlet of the mounting box 1, and the conveying roller 53 is driven by the servo motor 55 to rotate to convey the film 6 to be printed, and at the same time, the two groups of brush cleaning rollers 57 are driven to rotate, so as to clean the dust on the surface of the film 6 to be printed during transportation, thereby improving the surface quality of the film 6 to be printed;

[0032] The conveying and cleaning mechanism 5 includes a mounting frame 51 and a mounting cavity 52 arranged at one end of the mounting frame 51. The mounting frame 51 is provided with two upper and lower rows of conveying rollers 53. A servo motor 55 is fixedly installed on one side of the mounting frame 51 for providing power for the rotation of the conveying rollers 53. A synchronous transmission assembly 54 and a transmission gear 512 are provided on the other side for transmission connection of a plurality of conveying rollers 53. Two groups of brush cleaning rollers 57 distributed in a mirror image are arranged inside the mounting cavity 52. ​​A reduction transmission assembly 510 is provided at one end of the mounting cavity 52. ​​The transmission between the conveying roller 53 and the brush cleaning roller 57 can be reduced by the reduction transmission assembly 510, so that there is a speed difference between the rotation of the brush cleaning roller 57 and the movement of the film 6 to be printed, thereby improving the cleaning effect of the film 6 to be printed. The roller 53 is connected by transmission, and both ends of the installation cavity 52 are provided with a top pressure sealing component 59. When the film 6 to be printed is conveyed, the two groups of brush cleaning rollers 57 are closed by the elastic force of the compression spring 593, and the conveying port of the installation cavity 52 can be closed, thereby realizing the overall closure of the device to prevent dust from affecting the print head assembly 3 and the print roller assembly 4, and is used to adjust the position of the top pressure sealing component 59. The inner wall of the installation cavity 52 is provided with a plurality of cleaning teeth 58, and the outside is provided with an exhaust component 56. When the brush cleaning roller 57 rotates, the cleaning teeth 58 can move the brush cleaning roller 57 to make the dust cleaned from the surface of the brush cleaning roller 57 fall off, and the dust-containing air in the installation cavity 52 is extracted through the exhaust component 56, while ensuring the cleanliness of the brush cleaning roller 57 and improving the cleaning effect of the brush cleaning roller 57 on the exhaust component 56.

[0033] As a further implementation scheme of the above invention: the mounting frame 51 is inserted into the interior of the mounting box 1, and a flange is provided at the contact position between the mounting frame 51 and the mounting cavity 52, and the mounting frame 51 and the mounting cavity 52 are fixedly mounted on the mounting box 1 through the flange, ensuring that the conveying and cleaning mechanism 5 is firmly mounted on the mounting box 1 as a whole, and is easy to disassemble and assemble. A conveying port is provided on the side of the mounting cavity 52 away from the mounting frame 51, and a protective shell 511 cooperating with the synchronous transmission assembly 54 is provided on the mounting cavity 52. ​​The synchronous transmission assembly 54 can be protected by the protective shell 511, and the connecting position between the mounting cavity 52 and the mounting box 1 is sealed.

[0034] As a further implementation scheme of the above invention: the positions of the upper and lower rows of conveying rollers 53 in the mounting frame 51 correspond one to one, and the spacing between the upper and lower rows of conveying rollers 53 is adapted to the thickness of the film 6 to be printed. By the cooperation of the plurality of conveying rollers 53 in the mounting frame 51, the film 6 to be printed can be stably clamped, so that the film 6 to be printed can be stably and accurately conveyed when the conveying rollers 53 rotate.

[0035] As a further implementation scheme of the above invention: the number of synchronous transmission components 54 in the conveying and cleaning mechanism 5 is two groups, and the upper and lower rows of conveying rollers 53 can be independently driven by the two groups of synchronous transmission components 54 to achieve stable conveying of the film to be printed 6. The synchronous transmission components 54 include a group of synchronous transmission toothed belts and a plurality of synchronous transmission gears. The synchronous transmission gears are fixedly mounted on one end of the conveying rollers 53, and the synchronous transmission toothed belts are meshingly mounted on the outside of the synchronous transmission gears. The transmission is driven by the synchronous transmission gears and the synchronous transmission toothed belts to ensure the transmission effect and avoid slipping. At the same time, the plurality of conveying rollers 53 have the power to convey the film to be printed 6.

[0036] As a further implementation scheme of the above invention: there are two groups of transmission gears 512 in the conveying and cleaning mechanism 5, and the two groups of transmission gears 512 are fixedly mounted on the ends of two groups of conveying rollers 53 which are far away from the installation cavity 52 and distributed up and down. The two groups of transmission gears 512 are meshed with each other, and transmission is carried out through the transmission gears 512 so that the upper and lower rows of conveying rollers 53 rotate in opposite directions, thereby realizing the conveyance of the to-be-printed film 6, while reducing the number of driving structures and reducing costs.

[0037] As a further implementation scheme of the above invention: the reduction transmission component 510 includes a group of driving gears, driven gears and a transmission chain. When the conveying roller 53 is rotating, the transmission is carried out through the reduction transmission component 510, which can synchronously drive the brush cleaning roller 57 to rotate, so as to realize synchronous cleaning of the to-be-printed film 6 while conveying. The driving gear is fixedly sleeved on the end of a group of conveying rollers 53 close to the mounting cavity 52, and the driven gear is fixedly sleeved on the end of the brush cleaning roller 57. The transmission chain is meshingly sleeved on the outside of the driving gear and the driven gear. The transmission effect is guaranteed by the gear and chain transmission to avoid slipping. The diameter of the driving gear is one-half to one-third of the diameter of the driven gear, which can reduce the rotation speed of the brush cleaning roller 57, so that there is a speed difference between the rotation of the brush cleaning roller 57 and the movement of the to-be-printed film 6, thereby improving the cleaning effect of the to-be-printed film 6.

[0038] As a further implementation scheme of the above invention: the top pressure sealing assembly 59 includes a connecting ring 591, an arc-shaped guide shaft 592, a compression spring 593, a positioning plate 594 and an arc-shaped adjustment groove 595. The top pressure sealing assembly 59 that cooperates with the brush cleaning roller 57 is arranged at the end of the installation cavity 52. ​​When the printing film 6 is transported, the elastic force of the compression spring 593 can be overcome to open the two groups of brush cleaning rollers 57 to achieve stable transportation of the printing film 6. The connecting ring 591 is movably sleeved on one end of the brush cleaning roller 57, the arc-shaped guide shaft 592 is fixedly connected to the connecting ring 591, the positioning plate 594 is fixedly installed on the installation cavity 52, and the arc-shaped guide shaft 593 is fixedly connected to the connecting ring 591. The positioning plate 594 is fixedly installed on the installation cavity 52, and the arc-shaped guide shaft 593 is fixedly connected to the connecting ring 591. 92 is plugged into the positioning plate 594, and the positioning plate 594 can limit the positions of the arc guide shaft 592 and the compression spring 593 to ensure that the compression spring 593 can stably apply elastic force to the connecting ring 591 and the mounting frame 51. The compression spring 593 is movably sleeved on the arc guide shaft 592, and the arc guide shaft 592 is opened on the mounting cavity 52 and cooperates with the brush cleaning roller 57. When the film 6 to be printed is transported, the two sets of brush cleaning rollers 57 are closed by the elastic force of the compression spring 593, and the delivery port of the mounting cavity 52 can be closed, thereby realizing the overall closure of the device to prevent dust from affecting the print head assembly 3 and the print roller assembly 4.

[0039] As a further implementation scheme of the above invention: the cleaning teeth 58 are located on the inner wall of the installation cavity 52 on one side close to the installation frame 51, and when the brush cleaning roller 57 rotates, the cleaning teeth 58 can move the brush cleaning roller 57 to make the dust cleaned from the surface of the brush cleaning roller 57 fall off, and a plurality of cleaning teeth 58 are staggeredly distributed inside the installation cavity 52. ​​Since the cleaning teeth 58 are in contact with the brush cleaning roller 57, the cleaning teeth 58 are staggered to allow the gas on both sides of the cleaning teeth 58 to pass through, which is convenient for the vacuum component 56 to perform suction.

[0040] As a further implementation scheme of the above invention: the exhaust component 56 includes an exhaust manifold 561 and an exhaust fan 563. The exhaust manifold 561 is fixedly connected to the installation cavity 52, and the connection position between the exhaust manifold 561 and the installation cavity 52 is located on one side of the cleaning tooth 58. The exhaust manifold 561 is fixedly connected with an air duct 562, and the exhaust fan 563 is fixedly installed on one side of the installation box 1. The dust-containing air in the installation cavity 52 is extracted by the exhaust component 56 to prevent the dust-containing air from escaping into the installation box 1. At the same time, the cleanliness of the brush cleaning roller 57 is ensured, and the cleaning effect of the brush cleaning roller 57 on the exhaust component 56 is improved. The air inlet of the exhaust fan 563 is fixedly connected to the air duct 562, and a dust filter bag 564 is provided on the air outlet. The dust filter bag 564 is used to filter the dust-containing air to prevent the dust from affecting the environment.

[0041] A film printer comprises a mounting box 1, a sealing bottom plate 2, a print head assembly 3, a print roller assembly 4 and a conveying and cleaning mechanism 5.

[0042] In specific implementation, when printing the film 6 to be printed, the gripping mechanism of the film printer in the prior art grips the film 6 to be printed and puts it into the conveying and cleaning mechanism 5 at one end of the installation box 1. One set of conveying and cleaning mechanisms 5 at both ends of the installation box 1 is used for feeding the film 6 to be printed, and the other set of conveying and cleaning mechanisms 5 is used for discharging the film 6 to be printed. When the film 6 to be printed enters the conveying and cleaning mechanism 5 used for feeding, the servo motor 55 drives the conveying roller 53 on the output shaft to rotate, and drives all the conveying rollers 53 to rotate through the synchronous transmission component 54 and the transmission gear 512, and the upper and lower rows of conveying rollers 53 are driven to rotate. The rollers 53 rotate in opposite directions and are driven by the reduction transmission assembly 510 at the same time, driving the two groups of brush cleaning rollers 57 in the installation cavity 52 to rotate in opposite directions. The film 6 to be printed enters the two groups of brush cleaning rollers 57 in advance. The two groups of brush cleaning rollers 57 convey the film 6 to be printed to the conveying rollers 53 distributed upward and downward. The conveying rollers 53 cooperate with each other to convey the film 6 to be printed between the print head assembly 3 and the print roller assembly 4. The print head assembly 3 and the print roller assembly 4 cooperate to print the film 6 to be printed during conveying. The two groups of brush cleaning rollers 57 and the conveying roller 53 are driven by the reduction transmission assembly 510. The diameter of the driving gear in the reduction transmission assembly 510 is one-half to one-third of the diameter of the driven gear, which reduces the rotation speed of the brush cleaning roller 57, so that there is a speed difference between the rotation of the brush cleaning roller 57 and the rotation of the conveying roller 53, thereby causing a gap between the rotation of the brush cleaning roller 57 and the movement of the film 6 to be printed, so that the brush cleaning roller 57 can effectively clean the surface of the film 6 to be printed; the bristles on the surface of the rotating brush cleaning roller 57 are moved by the cleaning teeth 58, so that the dust on the surface of the brush cleaning roller 57 falls off and is dispersed in the installation cavity 52, and the exhaust fan 563 is started, and the exhaust fan 563 is moved along the exhaust manifold 561 and the air guide pipe 562 to the installation cavity 52. The dust-containing air inside the cavity 52 is adsorbed and discharged after being filtered through the dust removal filter bag 564, so as to prevent dust from escaping into the installation box 1 and to ensure that the surface of the brush cleaning roller 57 is clean; when the film 6 to be printed is transported, the two groups of brush cleaning rollers 57 are closed by the elastic force of the compression spring 593, and the conveying port of the installation cavity 52 is closed, so as to seal the device as a whole, so as to prevent dust from affecting the print head assembly 3 and the print roller assembly 4; the rotating component in the conveying and cleaning mechanism 5 for discharging and the rotating direction of the rotating component in the conveying and cleaning mechanism 5 for feeding are opposite to each other, so as to realize the single-direction conveying of the film 6 to be printed.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A printing device, comprising a mounting box (1), a sealing bottom plate (2) being fixedly mounted on the bottom of the mounting box (1) by screws, a print head assembly (3) and a print roller assembly (4) located below the print head assembly (3) being arranged on the mounting box (1), a film (6) to be printed being clamped between the print head assembly (3) and the print roller assembly (4), characterized in that: Also includes: A conveying and cleaning mechanism (5), wherein the number of the conveying and cleaning mechanism (5) is two groups, and the two groups of conveying and cleaning mechanisms (5) are respectively arranged at two ends of the installation box (1); The conveying and cleaning mechanism (5) comprises a mounting frame (51) and a mounting cavity (52) arranged at one end of the mounting frame (51); two upper and lower rows of conveying rollers (53) are arranged inside the mounting frame (51); a servo motor (55) is fixedly mounted on one side of the mounting frame (51) for providing power for the conveying rollers (53) to rotate; a synchronous transmission assembly (54) and a transmission gear (512) are arranged on the other side for transmission connection of a plurality of conveying rollers (53); two groups of brush cleaning rollers (57) distributed in a mirror image are arranged inside the mounting cavity (52); a reduction transmission assembly (510) is arranged at one end of the mounting cavity (52) for transmission connection of the brush cleaning rollers (57) and the conveying rollers (53); top pressure sealing assemblies (59) are arranged at both ends of the mounting cavity (52) for adjusting the position of the top pressure sealing assemblies (59); a plurality of cleaning shifting teeth (58) are arranged on the inner wall of the mounting cavity (52); and an air extraction assembly (56) is arranged outside.

2. A printing device according to claim 1, characterized in that: The mounting frame (51) is inserted into the interior of the mounting box (1); a flange is provided at the contact position between the mounting frame (51) and the mounting cavity (52); the mounting frame (51) and the mounting cavity (52) are fixedly mounted on the mounting box (1) via the flange; a conveying port is provided on a side of the mounting cavity (52) away from the mounting frame (51); and a protective shell (511) cooperating with a synchronous transmission assembly (54) is provided on the mounting cavity (52).

3. A printing device according to claim 1, characterized in that: The positions of the upper and lower rows of conveying rollers (53) in the mounting frame (51) correspond to each other, and the spacing between the upper and lower rows of conveying rollers (53) is adapted to the thickness of the film (6) to be printed.

4. A printing device according to claim 1, characterized in that: The number of synchronous transmission components (54) in the conveying and cleaning mechanism (5) is two groups, and the synchronous transmission components (54) include a group of synchronous transmission toothed belts and a plurality of synchronous transmission gears. The synchronous transmission gears are fixedly sleeved on one end of the conveying roller (53), and the synchronous transmission toothed belts are meshingly sleeved on the outside of the synchronous transmission gears.

5. A printing device according to claim 1, characterized in that: The number of transmission gears (512) in the conveying and cleaning mechanism (5) is two groups. The two groups of transmission gears (512) are fixedly mounted on the ends of two groups of conveying rollers (53) which are far away from the installation cavity (52) and distributed up and down. The two groups of transmission gears (512) are meshed with each other.

6. A printing device according to claim 1, characterized in that: The reduction transmission assembly (510) comprises a group of driving gears, driven gears and a transmission chain. The driving gears are fixedly sleeved on the ends of a group of conveying rollers (53) close to the mounting cavity (52). The driven gears are fixedly sleeved on the ends of the brush cleaning rollers (57). The transmission chain is meshingly sleeved on the outside of the driving gears and the driven gears. The diameter of the driving gears is one-half to one-third of the diameter of the driven gears.

7. A printing device according to claim 1, characterized in that: The top pressure sealing assembly (59) comprises a connecting ring (591), an arc-shaped guide shaft (592), a compression spring (593), a positioning plate (594) and an arc-shaped adjustment groove (595); the connecting ring (591) is movably mounted on one end of the brush cleaning roller (57); the arc-shaped guide shaft (592) is fixedly connected to the connecting ring (591); the positioning plate (594) is fixedly mounted on the mounting cavity (52); the arc-shaped guide shaft (592) is plugged into the positioning plate (594); the compression spring (593) is movably mounted on the arc-shaped guide shaft (592); the arc-shaped guide shaft (592) is opened on the mounting cavity (52) and cooperates with the brush cleaning roller (57).

8. A printing device according to claim 1, characterized in that: The cleaning teeth (58) are located on a side of the inner wall of the installation cavity (52) close to the installation frame (51), and a plurality of cleaning teeth (58) are staggeredly distributed inside the installation cavity (52).

9. A printing device according to claim 1, characterized in that: The exhaust assembly (56) comprises an exhaust manifold (561) and an exhaust fan (563); the exhaust manifold (561) is fixedly connected to the installation cavity (52), and the connection position between the exhaust manifold (561) and the installation cavity (52) is located on one side of the cleaning tooth (58); the exhaust manifold (561) is fixedly connected to an air guide pipe (562); the exhaust fan (563) is fixedly installed on one side of the installation box (1); the air inlet of the exhaust fan (563) is fixedly connected to the air guide pipe (562), and a dust filter bag (564) is provided on the air outlet.

10. A film printer, characterized in that: A printing device comprising any one of claims 1 to 9.

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