Printing mechanism and ink-jet printer

Abstract

The invention belongs to the field of printers, and particularly relates to a printing mechanism and an ink-jet printer, and the printing mechanism comprises a carrier frame, a printing controller, an ink box, a nozzle, a nozzle driving mechanism, a follow-up block, a linear transmission mechanism and an intermediate transmission mechanism. Through mutual cooperation of a nozzle driving mechanism, a follow-up block, a linear transmission mechanism and a middle transmission mechanism, when printing operation is carried out, the nozzle driving mechanism drives a nozzle to move, and meanwhile, the linear transmission mechanism is transmitted through the middle transmission mechanism, so that the follow-up block for supporting a control line and an ink conveying pipe and the nozzle move synchronously; the middle node of the control line and the ink conveying pipe is lifted, the influence of the line and the pipeline on the operation precision of the nozzle is reduced, meanwhile, the line and the pipeline are protected, the service life of the control line and the ink conveying pipe is prolonged, and the printing quality and the service life of the ink-jet printer are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of printers, and in particular to a printing mechanism and an inkjet printer. Background Art

[0002] An inkjet printer is a common printing device that forms text or images by ejecting ink droplets onto the print medium. The basic principle of an inkjet printer is to eject ink of a specific color onto paper to achieve the purpose of printing. The specific process includes: putting paper into the printer, the printer extracts ink of a specific color from the ink cartridge and feeds it into the nozzle, which is equipped with tiny nozzles that spray ink onto the paper through the nozzles, and a controller is used to control the spraying direction, speed, and quality of the nozzle.

[0003] When an inkjet printer is in use, the nozzle will continuously extract ink from the ink cartridge through the pipe, and the nozzle will make reciprocating lateral movements so that the ink droplets can accurately fall on the designated position on the paper. During this process, the nozzle will continuously pull the lines and pipes, causing the lines and pipes to continuously twist and stretch back and forth, which will in turn consume the service life of the pipes and lines. Long-term operation will reduce the accuracy and stability of the printer's printing. Summary of the invention

[0004] The embodiments of the present application provide a printing mechanism and an inkjet printer, which are used to solve the problem that during the printing process of the inkjet printer, the reciprocating motion of the nozzle constantly pulls the circuits and pipes, thereby consuming the service life of the pipes and circuits.

[0005] To this end, according to one aspect of the present application, there is provided a printing mechanism, including a carrier, a printing controller, an ink cartridge, a nozzle, a nozzle driving mechanism, a follower block, a linear transmission mechanism and an intermediate transmission mechanism; The carrier is in the shape of a rectangular frame, a guide rod is arranged inside the carrier, the nozzle is slidably arranged on the guide rod, the printing controller and the ink cartridge are both arranged on the carrier, the printing controller is electrically connected to the nozzle through a control line, and the ink cartridge supplies ink to the nozzle through an ink supply tube; the nozzle drive mechanism is arranged on the carrier and connected to the nozzle, and the nozzle drive mechanism is used to drive the nozzle to reciprocate along the guide rod; the linear transmission mechanism is arranged above the carrier through a bracket, and the transmission direction of the linear transmission mechanism is parallel to the guide rod, the follower block is arranged on the linear transmission mechanism, and the middle part of the control line and the middle part of the ink supply tube are both arranged on the follower block; the intermediate transmission mechanism is connected between the nozzle drive mechanism and the linear transmission mechanism, and when the nozzle drive mechanism drives the nozzle to move along the guide rod, the nozzle drive mechanism drives the linear transmission mechanism to move through the intermediate transmission mechanism, and then drives the follower block to move synchronously along the direction of movement of the nozzle.

[0006] Optionally, the nozzle driving mechanism includes a driving motor and a synchronous belt transmission mechanism, the synchronous belt transmission mechanism includes a driving pulley, a driven pulley and a synchronous belt connected between the driving pulley and the driven pulley, the output shaft of the driving motor is connected to the driving pulley, the synchronous belt is connected to the nozzle and can drive the nozzle to reciprocate along the guide rod, and the intermediate transmission mechanism is connected between the driven pulley and the linear transmission mechanism.

[0007] Optionally, the linear transmission mechanism includes a screw and a guide rail arranged parallel to the screw, the screw and the guide rail are both parallel to the guide rod, the follower block is threadedly connected to the screw and slidably connected to the guide rail, and the intermediate transmission mechanism is connected between the driven pulley and the screw.

[0008] Optionally, the intermediate transmission mechanism includes a first gear, a second gear, a crown gear, a third gear, a first bevel gear and a second bevel gear, the first gear is coaxially connected to the driven pulley, the second gear is coaxially connected to the crown gear, and the second gear is meshed with the first gear, the third gear is coaxially connected to the first bevel gear, and the third gear is meshed with the crown gear, the second bevel gear is fixed to one end of the screw rod and meshed with the first bevel gear, and a fixing frame is provided on the carrier, and the first gear, the second gear and the third gear are all rotatably set on the fixing frame.

[0009] Optionally, a radius of the second gear is greater than a radius of the first gear.

[0010] According to another aspect of the present application, an inkjet printer is provided, comprising a paper conveying device and the printing mechanism as described above, wherein the printing mechanism is arranged on a path for conveying paper by the paper conveying device.

[0011] Optionally, the paper conveying device includes a base, a platform arranged on the base, a paper feed rack arranged at one end of the platform, a paper output paperboard arranged at the other end of the platform, a paper pickup roller arranged at one end of the platform close to the paper feed rack, and a paper output roller arranged at one end of the platform close to the paper output paperboard, and the carrier in the printing mechanism is arranged on the platform.

[0012] Optionally, the paper conveying device also includes a belt conveying mechanism, which includes two belt transmission mechanisms respectively arranged on both sides of the platform along the paper conveying direction and a driving component that drives the two belt transmission mechanisms to operate synchronously, and the transmission direction of the belt transmission mechanism is parallel to the conveying direction of the paper on the platform. During the transmission of the paper on the platform, the opposite sides of the paper are respectively located on the two belt transmission mechanisms, and the belt transmission mechanism has an adsorption component that can adsorb the paper.

[0013] Optionally, the adsorption assembly includes a strip-shaped adsorption block arranged on the side of the platform, a plurality of coils are arranged on the top of the strip-shaped adsorption block along the conveying direction of the paper, a convex block is elastically arranged on the top of the strip-shaped adsorption block, and a switch contact for controlling the on and off of each coil is arranged between the bottom of the convex block and the strip-shaped adsorption block; The belt transmission mechanism includes a driving wheel, a driven wheel, and two inner belts and outer belts that are arranged in parallel and connected to each other. The driving wheel and the driven wheel are both rotatably arranged on the outside of the platform, the outer belt is connected between the driving wheel and the driven wheel, the driving assembly is connected to the driving wheel, the inner belt is wound around the outside of the strip-shaped adsorption block, and the inner side of the inner belt is symmetrically provided with card slots. When the paper is about to contact the top of the inner belt, the top of the protrusion is disengaged from one of the card slots, and moves downward under the pressure of the inner belt and triggers the switch contact, so that each of the coils is energized to adsorb the paper; when the paper is about to run to the paper output board and contact the paper output roller, the protrusion enters the inside of another card slot, disengages from the switch contact, and then disconnects the power supply of each of the coils to stop adsorbing the paper.

[0014] Optionally, the driving assembly includes a driving motor disposed on the base and a transmission shaft drivingly connected to the driving motor, and both ends of the transmission shaft are respectively connected to the driving wheels in the two belt transmission mechanisms.

[0015] The beneficial effects of the printing mechanism and inkjet printer provided by the present application are as follows: compared with the prior art, the printing mechanism of the present application cooperates with each other through the nozzle driving mechanism, the follower block, the linear transmission mechanism and the intermediate transmission mechanism. When performing a printing operation, the nozzle driving mechanism drives the nozzle to move while transmitting the linear transmission mechanism through the intermediate transmission mechanism, so that the follower block supporting the control line and the ink supply tube moves synchronously with the nozzle, and the intermediate node of the control line and the ink supply tube is lifted, thereby reducing the influence of the line and pipeline on the operation accuracy of the nozzle, and at the same time protecting the line and pipeline, thereby increasing the service life of the control line and the ink supply tube, and ensuring the printing quality and service life of the inkjet printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] in: Figure 1 is a structural schematic diagram of a printing mechanism shown in an embodiment of the present application; Figure 2 This is a schematic diagram of a portion of the structure of a printing mechanism shown in an embodiment of the present application. Figure 1 ; Figure 3 This is a schematic diagram of a portion of the structure of a printing mechanism shown in an embodiment of the present application. Figure 2 ; Figure 4 is a structural schematic diagram of an inkjet printer with a housing shown in an embodiment of the present application; Figure 5 is a schematic structural diagram of an inkjet printer with the housing removed, shown in one embodiment of the present application; Figure 6 is a schematic structural diagram of a paper conveying device in an inkjet printer shown in an embodiment of the present application; Figure 7 It is a partial structural schematic diagram of a paper conveying device in an inkjet printer shown in one embodiment of the present application; Figure 8 It is a schematic cross-sectional structure diagram of an inner belt of a paper conveying device in an inkjet printer shown in an embodiment of the present application along the conveying direction.

[0018] Description of main component symbols: 10. Printing mechanism; 11. carrier; 111. guide rod; 112. bracket; 113. fixing frame; 12. Print controller; 121. Control line; 13. ink cartridge; 131. ink delivery tube; 14. Nozzle; 15. Nozzle drive mechanism; 151. Drive motor; 152. Synchronous belt transmission mechanism; 1521. Active pulley; 1522. Driven pulley; 1523. Synchronous belt; 16. Follower block; 17. Linear transmission mechanism; 171. Screw rod; 172. Guide rail; 18. Intermediate transmission mechanism; 181. First gear; 182. Second gear; 183. Crown gear; 184. Third gear; 185. First bevel gear; 186. Second bevel gear; 20. Paper conveying device; 21. Base; 22. Platform; 23. Paper feed rack; 24. Paperboard output; 25. Pick-up roller; 26. Paper output roller; 27, belt conveying mechanism; 271, belt transmission mechanism; 2711, driving wheel; 2712, driven wheel; 2713, inner belt; 27131, card slot; 2714, outer belt; 272, driving component; 2721, driving motor; 2722, transmission shaft; 273, adsorption component; 2731, strip adsorption block; 2732, coil; 2733, convex block; 28. Shell; 29. Control panel. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings below. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In addition, the terms "first", "second" and the like are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0024] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0025] According to one aspect of the present application, an embodiment of the present application provides a printing mechanism, such as Figure 1-Figure 2As shown, the printing mechanism 10 includes a carrier 11, a printing controller 12, an ink cartridge 13, a nozzle 14, a nozzle driving mechanism 15, a follower block 16, a linear transmission mechanism 17 and an intermediate transmission mechanism 18. The carrier 11 is in the shape of a rectangular frame, and a guide rod 111 is provided inside the carrier 11. The nozzle 14 is slidably provided on the guide rod 111. The printing controller 12 and the ink cartridge 13 are both provided on the carrier 11. The printing controller 12 is electrically connected to the nozzle 14 through a control line 121, and the ink cartridge 13 supplies ink to the nozzle 14 through an ink supply tube 131; the nozzle driving mechanism 15 is provided on the carrier 11 and connected to the nozzle 14, and the nozzle driving mechanism 15 is used to drive the nozzle 14 to reciprocate along the guide rod 111; the linear transmission mechanism 17 is provided on the upper side of the carrier 11 through a bracket 112 The linear transmission mechanism 17 has a transmission direction parallel to the guide rod 111, the follower block 16 is arranged on the linear transmission mechanism 17, and the middle part of the control line 121 and the middle part of the ink supply tube 131 are both arranged on the follower block 16; the intermediate transmission mechanism 18 is connected between the nozzle driving mechanism 15 and the linear transmission mechanism 17. When the nozzle driving mechanism 15 drives the nozzle 14 to move along the guide rod 111, the nozzle driving mechanism 15 drives the linear transmission mechanism 17 to move through the intermediate transmission mechanism 18, and then drives the follower block 16 to move synchronously along the direction of movement of the nozzle 14.

[0026] In the embodiment of the present application, the printing mechanism 10 cooperates with each other through the nozzle driving mechanism 15, the follower block 16, the linear transmission mechanism 17 and the intermediate transmission mechanism 18. When performing a printing operation, the nozzle driving mechanism 15 drives the nozzle 14 to move while transmitting the linear transmission mechanism 17 through the intermediate transmission mechanism 18, so that the follower block 16 supporting the control line 121 and the ink supply tube 131 moves synchronously with the nozzle 14, and the intermediate node of the control line 121 and the ink supply tube 131 is lifted, thereby reducing the influence of the lines and pipelines on the operating accuracy of the nozzle 14, and at the same time protecting the lines and pipelines, thereby increasing the service life of the control line 121 and the ink supply tube 131, and ensuring the printing quality and service life of the inkjet printer.

[0027] In one embodiment, if Figure 1-Figure 2 As shown, the nozzle driving mechanism 15 includes a driving motor 151 and a synchronous belt transmission mechanism 152. The synchronous belt transmission mechanism 152 includes a driving pulley 1521, a driven pulley 1522 and a synchronous belt 1523 connected between the driving pulley 1521 and the driven pulley 1522. The output shaft of the driving motor 151 is connected to the driving pulley 1521. The synchronous belt 1523 is connected to the nozzle 14 and can drive the nozzle 14 to reciprocate along the guide rod 111. The intermediate transmission mechanism 18 is connected between the driven pulley 1522 and the linear transmission mechanism 17.

[0028] The synchronous belt transmission mechanism 152 has the advantages of stable transmission and high transmission progress, and can improve the accuracy and stability of the movement of the nozzle 14.

[0029] It is understandable that the nozzle driving mechanism 15 may also adopt other types of linear modules / linear slides.

[0030] In a specific embodiment, Figure 1-Figure 2 As shown, the linear transmission mechanism 17 includes a screw rod 171 and a guide rail 172 arranged parallel to the screw rod 171, the screw rod 171 and the guide rail 172 are both parallel to the guide rod 111, the follower block 16 is screwed to the screw rod 171 and slidably connected to the guide rail 172, and the intermediate transmission mechanism 18 is connected between the driven pulley 1522 and the screw rod 171.

[0031] The linear transmission mechanism 17 is realized by a screw nut and a linear guide rail, and the transmission is stable and reliable.

[0032] In a further specific embodiment, Figure 2-Figure 3 As shown, the intermediate transmission mechanism 18 includes a first gear 181, a second gear 182, a crown gear 183, a third gear 184, a first bevel gear 185 and a second bevel gear 186. The first gear 181 is coaxially connected to the driven pulley 1522, the second gear 182 is coaxially connected to the crown gear 183, and the second gear 182 is meshed with the first gear 181, the third gear 184 is coaxially connected to the first bevel gear 185, and the third gear 184 is meshed with the crown gear 183, the second bevel gear 186 is fixed to one end of the screw rod 171 and meshed with the first bevel gear 185, and a fixing frame 113 is provided on the carrier 11, and the first gear 181, the second gear 182 and the third gear 184 are all rotatably set on the fixing frame 113.

[0033] The gear transmission mechanism is used to realize linkage between the nozzle driving mechanism 15 and the linear transmission mechanism 17 , so that the transmission is stable and reliable, and vertical transmission of force and motion is realized.

[0034] Preferably, the radius of the second gear 182 is greater than the radius of the first gear 181. With this design, when the follower block 16 moves synchronously with the nozzle 14, the displacement distance period of the follower block 16 is smaller than that of the nozzle 14, thereby effectively reducing the swing of the control line 121 and the ink delivery tube 131, thereby effectively reducing the loss of the line and pipeline.

[0035] According to another aspect of the present application, an embodiment of the present application further provides an inkjet printer, such as Figure 5 As shown, the inkjet printer includes a paper conveying device 20 and a printing mechanism 10 in any of the above embodiments, and the printing mechanism 10 is arranged on the path where the paper conveying device 20 conveys paper.

[0036] Since the inkjet printer adopts the printing mechanism 10 in the above embodiment, it also has the advantages and benefits brought by the above printing mechanism 10, thereby improving the printing quality and service life of the inkjet printer.

[0037] In one embodiment, if Figure 6 As shown, the paper conveying device 20 includes a base 21, a platform 22 arranged on the base 21, a paper feed rack 23 arranged at one end of the platform 22, a paper output board 24 arranged at the other end of the platform 22, a paper pickup roller 25 arranged at one end of the platform 22 close to the paper feed rack 23, and a paper output roller 26 arranged at one end of the platform 22 close to the paper output board 24, and the carrier 11 in the printing mechanism 10 is arranged on the platform 22.

[0038] When the inkjet printer is in use, the paper is transported as follows: the paper is fed into the inkjet printer from the paper feed rack 23, transported to the platform 22 by the pickup roller 25, and then transported from the platform 22 by the paper output roller 26, and outputted by the paper output board 24. The paper passing through the platform 22 is subjected to inkjet printing by the printing mechanism 10.

[0039] It should be noted that the existing printers usually use rollers and belts to directly transport the paper, which has a very unsatisfactory printing effect on wrinkled paper and is prone to deviation.

[0040] In this regard, in a specific embodiment, Figure 6-Figure 7 As shown, the paper conveying device 20 also includes a belt conveying mechanism 27, which includes two belt transmission mechanisms 271 respectively arranged on both sides of the platform 22 along the paper conveying direction and a driving component 272 that drives the two belt transmission mechanisms 271 to operate synchronously. The transmission direction of the belt transmission mechanism 271 is parallel to the conveying direction of the paper on the platform 22. During the transmission of the paper on the platform 22, the opposite sides of the paper are respectively located on the two belt transmission mechanisms 271, and the belt transmission mechanism 271 has an adsorption component 273 that can adsorb the paper.

[0041] When the pickup roller 25 transports the paper to the platform 22, the two sides of the bottom of the paper are in contact with the belts of the belt transmission mechanism 271, and the paper is adsorbed by the adsorption component 273, so that the paper can be unfolded and transported flatly on the top of the platform 22, thereby effectively improving the flatness of the paper and improving the printing quality.

[0042] In a specific embodiment, in combination Figure 7-Figure 8As shown, the adsorption component 273 includes a strip-shaped adsorption block 2731 arranged on the side of the platform 22, and a plurality of coils 2732 are arranged on the top of the strip-shaped adsorption block 2731 along the conveying direction of the paper, and a protrusion 2733 is elastically arranged on the top of the strip-shaped adsorption block 2731, and a switch contact (not shown in the figure) for controlling the power on and off of each coil 2732 is arranged between the bottom of the protrusion 2733 and the strip-shaped adsorption block 2731.

[0043] The belt transmission mechanism 271 includes a driving wheel 2711, a driven wheel 2712, and two inner belts 2713 and outer belts 2714 arranged in parallel and connected to each other. The driving wheel 2711 and the driven wheel 2712 are both rotatably arranged on the outside of the platform 22, the outer belt 2714 is connected between the driving wheel 2711 and the driven wheel 2712, the driving assembly 272 is connected to the driving wheel 2711, the inner belt 2713 is wound around the outside of the strip-shaped adsorption block 2731, and the inner side of the inner belt 2713 is symmetrically provided with a card slot 2 7131, when the paper is about to touch the top of the inner belt 2713, the top of the protrusion 2733 disengages from one of the slots 27131, and moves downward under the pressure of the inner belt 2713 and triggers the switch contact, so that each coil 2732 is energized to adsorb the paper; when the paper is about to run to the paper board 24 and contact the paper output roller 26, the protrusion 2733 enters the inside of the other slot 27131, disengages from the switch contact, and then disconnects the power supply of each coil 2732 to stop adsorbing the paper.

[0044] The driving assembly 272 includes a driving motor 2721 disposed on the base 21 and a transmission shaft 2722 drivingly connected to the driving motor 2721 , and two ends of the transmission shaft 2722 are respectively connected to driving wheels 2711 in two belt transmission mechanisms 271 .

[0045] Furthermore, if Figure 4 As shown, the inkjet printer further comprises a housing 28 and a control panel 29 disposed on the housing 28 .

[0046] The working principle of the inkjet printer in the embodiment of the present application is as follows: when performing a printing operation, the nozzle driving mechanism 15 drives the nozzle 14 to move while transmitting the linear transmission mechanism 17 through the intermediate transmission mechanism 18, so that the follower block 16 supporting the control line 121 and the ink supply tube 131 moves synchronously with the nozzle 14, and the intermediate node of the control line 121 and the ink supply tube 131 is lifted, thereby reducing the influence of the line and pipeline on the operation accuracy of the nozzle 14, and protecting the line and pipeline, improving the service life of the control line 121 and the ink supply tube 131, and ensuring the printing quality and service life of the inkjet printer. At the same time, the paper is driven by the paper conveying device 20 and the adsorption component 273 to improve the smoothness of the paper operation, thereby ensuring the printing quality.

[0047] The electrical components appearing in this article are all existing electrical components.

[0048] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A printing mechanism, characterized in that: It includes a carrier, a printing controller, an ink cartridge, a nozzle, a nozzle driving mechanism, a follower block, a linear transmission mechanism and an intermediate transmission mechanism; The carrier is in the shape of a rectangular frame, a guide rod is arranged inside the carrier, the nozzle is slidably arranged on the guide rod, the printing controller and the ink cartridge are both arranged on the carrier, the printing controller is electrically connected to the nozzle through a control line, and the ink cartridge supplies ink to the nozzle through an ink supply tube; the nozzle drive mechanism is arranged on the carrier and connected to the nozzle, and the nozzle drive mechanism is used to drive the nozzle to reciprocate along the guide rod; the linear transmission mechanism is arranged above the carrier through a bracket, and the transmission direction of the linear transmission mechanism is parallel to the guide rod, the follower block is arranged on the linear transmission mechanism, and the middle part of the control line and the middle part of the ink supply tube are both arranged on the follower block; the intermediate transmission mechanism is connected between the nozzle drive mechanism and the linear transmission mechanism, and when the nozzle drive mechanism drives the nozzle to move along the guide rod, the nozzle drive mechanism drives the linear transmission mechanism to move through the intermediate transmission mechanism, and then drives the follower block to move synchronously along the direction of movement of the nozzle.

2. The printing mechanism according to claim 1, characterized in that: The nozzle driving mechanism includes a driving motor and a synchronous belt transmission mechanism, the synchronous belt transmission mechanism includes a driving pulley, a driven pulley and a synchronous belt connected between the driving pulley and the driven pulley, the output shaft of the driving motor is connected to the driving pulley, the synchronous belt is connected to the nozzle and can drive the nozzle to reciprocate along the guide rod, and the intermediate transmission mechanism is connected between the driven pulley and the linear transmission mechanism.

3. The printing mechanism according to claim 2, characterized in that: The linear transmission mechanism includes a screw and a guide rail arranged parallel to the screw, the screw and the guide rail are both parallel to the guide rod, the follower block is screwed to the screw and slidably connected to the guide rail, and the intermediate transmission mechanism is connected between the driven pulley and the screw.

4. The printing mechanism according to claim 3, characterized in that: The intermediate transmission mechanism includes a first gear, a second gear, a crown gear, a third gear, a first bevel gear and a second bevel gear. The first gear is coaxially connected to the driven pulley, the second gear is coaxially connected to the crown gear, and the second gear is meshed with the first gear. The third gear is coaxially connected to the first bevel gear, and the third gear is meshed with the crown gear. The second bevel gear is fixed to one end of the screw rod and meshed with the first bevel gear. A fixing frame is provided on the carrier, and the first gear, the second gear and the third gear are all rotatably set on the fixing frame.

5. The printing mechanism according to claim 4, characterized in that: The radius of the second gear is greater than the radius of the first gear.

6. An inkjet printer, characterized in that: It comprises a paper conveying device and a printing mechanism as described in any one of claims 1 to 5, wherein the printing mechanism is arranged on a path for conveying paper by the paper conveying device.

7. The inkjet printer according to claim 6, characterized in that: The paper conveying device includes a base, a platform arranged on the base, a paper feed rack arranged at one end of the platform, a paper output paper board arranged at the other end of the platform, a paper pickup roller arranged at one end of the platform close to the paper feed rack, and a paper output roller arranged at one end of the platform close to the paper output paper board, and the carrier in the printing mechanism is arranged on the platform.

8. The inkjet printer according to claim 7, characterized in that: The paper conveying device also includes a belt conveying mechanism, which includes two belt transmission mechanisms respectively arranged on both sides of the platform along the paper conveying direction and a driving component that drives the two belt transmission mechanisms to operate synchronously. The transmission direction of the belt transmission mechanism is parallel to the conveying direction of the paper on the platform. During the transmission of the paper on the platform, the opposite sides of the paper are respectively located on the two belt transmission mechanisms, and the belt transmission mechanism has an adsorption component that can adsorb the paper.

9. The inkjet printer according to claim 8, characterized in that: The adsorption assembly comprises a strip-shaped adsorption block arranged on the side of the platform, a plurality of coils are arranged on the top of the strip-shaped adsorption block along the conveying direction of the paper, a convex block is elastically arranged on the top of the strip-shaped adsorption block, and a switch contact for controlling the on and off of each coil is arranged between the bottom of the convex block and the strip-shaped adsorption block; The belt transmission mechanism includes a driving wheel, a driven wheel, and two inner belts and outer belts that are arranged in parallel and connected to each other. The driving wheel and the driven wheel are both rotatably arranged on the outside of the platform, the outer belt is connected between the driving wheel and the driven wheel, the driving assembly is connected to the driving wheel, the inner belt is wound around the outside of the strip-shaped adsorption block, and the inner side of the inner belt is symmetrically provided with card slots. When the paper is about to contact the top of the inner belt, the top of the protrusion is disengaged from one of the card slots, and moves downward under the pressure of the inner belt and triggers the switch contact, so that each of the coils is energized to adsorb the paper; when the paper is about to run to the paper output board and contact the paper output roller, the protrusion enters the inside of another card slot, disengages from the switch contact, and then disconnects the power supply of each of the coils to stop adsorbing the paper.

10. The inkjet printer according to claim 9, characterized in that: The driving assembly comprises a driving motor arranged on the base and a transmission shaft drivingly connected to the driving motor, and two ends of the transmission shaft are respectively connected to the driving wheels in the two belt transmission mechanisms.

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