Multi-point synchronous jet printing device based on intelligent printing of medicine packaging and control method of multi-point synchronous jet printing device

Abstract

The invention relates to the technical field of jet printing devices, in particular to a multi-point synchronous jet printing device based on medicine packaging intelligent printing and a control method thereof.The multi-point synchronous jet printing device comprises a machine table driving assembly, a supporting jet printing assembly is slidably connected to the inner side of the machine table driving assembly, and a rotating driving assembly is fixedly connected to one end of the supporting jet printing assembly; an assembling positioning assembly is fixedly connected to the inner side of the supporting jet printing assembly, a speed control assembly is fixedly connected to the bottom end of the assembling positioning assembly, medicine bottles are inserted into the inner side of the assembling positioning assembly, the supporting jet printing assembly comprises a base disc, an electric driving mechanism is fixedly connected to the bottom end of the base disc, and a hydraulic driving structure is fixedly connected to the top end of the base disc. According to the medical packaging jet printing device, the traditional complex multi-drive design is simplified, the equipment size and cost are remarkably reduced, the fault risk and maintenance cost are reduced, the economical efficiency and practicability are improved, and an efficient, stable and low-cost scheme is provided for medical packaging jet printing.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing equipment technology, specifically to a multi-point synchronous inkjet printing device and its control method based on intelligent printing of pharmaceutical packaging. Background Technology

[0002] Pharmaceutical packaging is a collection of containers and packaging materials used for loading, protecting, marking, and handling pharmaceuticals and their preparations. It must ensure the safety, stability, and effectiveness of pharmaceuticals during production, storage, transportation, and use, and prevent pharmaceuticals from being damaged by physical, chemical, or microbial factors. At the same time, it must provide necessary information such as the name of the pharmaceutical product, dosage, expiration date, and instructions for use, so that patients can use it and regulatory authorities can manage it. In the production process of pharmaceutical packaging, printing equipment is required to complete the printing of information. Multi-point synchronous inkjet printing equipment is a device that can perform precise printing at multiple positions simultaneously. It uses multiple printheads or printing units to simultaneously and precisely print ink or other printing materials onto the surface of a target object according to a preset pattern and position. This device is widely used in industrial production, packaging, electronics manufacturing and other fields, and can achieve efficient and accurate multi-point printing, thereby improving production efficiency and product quality. When printing on multiple bottled pharmaceutical packaging, multiple bottles or printheads need to be moved because different positions on the bottle need to be printed. If multiple drive mechanisms are added, it will not only make the equipment structure more complicated, increase the size and cost of the equipment, but also increase the risk of system failure, increase the difficulty and cost of maintenance. Therefore, in order to address the above problems, a multi-point synchronous printing device and its control method based on intelligent printing of pharmaceutical packaging are proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-point synchronous inkjet printing device and its control method based on intelligent printing of pharmaceutical packaging, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A multi-point synchronous inkjet printing device for intelligent printing of pharmaceutical packaging includes a machine drive assembly. A supporting inkjet printing assembly is slidably connected to the inner side of the machine drive assembly. A rotary drive assembly is fixedly connected to one end of the supporting inkjet printing assembly. An assembly positioning assembly is fixedly connected to the inner side of the supporting inkjet printing assembly. A speed control assembly is fixedly connected to the bottom end of the assembly positioning assembly. A pharmaceutical bottle is inserted into the inner side of the assembly positioning assembly. The supporting inkjet printing assembly includes a base plate. An electric drive mechanism is fixedly connected to the bottom end of the base plate. A hydraulic drive structure is fixedly connected to the top end of the base plate. The bottom end of the electric drive mechanism is fixedly connected to the inner side of the machine slot. The machine slot is opened inside the cap shell. Multiple sets of racks are fixedly connected to the outer side of the cap shell. A gap is left between the top end of the cap shell and the bottom end of the base plate to prevent friction. A cylindrical shell is fixedly connected to the inner side of the assembly port opened on the base plate. An extension column is fixedly connected to the inner side of the cylindrical shell through a spring.

[0005] As a further optimization of the present invention, the machine tool drive assembly includes a worktable, a support frame is fixedly connected to the bottom of the worktable, a guide hole is opened on the inner side of the worktable, a guide column is slidably connected to the inner side of the guide hole, a base plate is fixedly connected to the top of the guide column, and a servo motor is fixedly connected to the bottom of the base plate.

[0006] As a further optimization of the present invention, an arch frame is fixedly connected to the top of the workbench, the inner side of the arch frame is fixedly connected to the cylinder body of the electric hydraulic cylinder, the end of the piston rod of the electric hydraulic cylinder is fixedly connected to the top of the base plate, and a gap is provided between the arch frame and the base plate.

[0007] As a further optimization of the present invention, a positioning arc plate is sleeved on the outer side of the base plate, a printing head is fixedly connected to the top of the positioning arc plate, the positioning arc plate is fixedly connected to the arch frame, and the nozzle of the printing head faces the medicine bottle.

[0008] As a further optimization of the present invention, a ball bearing is fixedly connected to the inner side of the cylindrical shell, and the inner side of the ball bearing is fixedly fitted with a bearing. The bearing extends to the upper end of the cylindrical shell, and the cylindrical shell extends to the lower end of the bearing. The cylindrical shell is rotatably fitted with the bearing through the ball bearing.

[0009] As a further optimization of the present invention, a gear is fixedly connected to the outer side of the extension column. The gear is located at the lower end of the cylindrical shell. The outer side of the gear can mesh with the rack assembly. The outer side of the gear and the cap shell are in clearance fit.

[0010] As a further optimization of the present invention, the upper end of the bearing is provided with an expansion port, a rubber ring is fixedly connected to the inner side of the expansion port, the upper end of the expansion port is designed to be flared, the expansion port is inserted into and cooperates with the medicine bottle, and the inner side of the rubber ring is tightly fitted with the medicine bottle.

[0011] As a further optimization of the present invention, wherein: a spiral column is fixedly connected to the bottom end of the extension column, the spiral column is spiral in shape, a rubber sealing ring is fixedly connected to the outside of the spiral column, the spiral column is spirally installed inside the spiral groove, the outside of the rubber sealing ring is in contact with the inside of the spiral groove, the spiral groove is opened on the inside of the column block, a fixing plate is fixedly connected to the outside of the column block, a telescopic rod is fixedly connected to the top of the fixing plate, and the top of the telescopic rod is fixedly connected to the bottom end of the base plate.

[0012] As a further optimization of the present invention, a rubber duckbill valve is fixedly connected to the front end of the column block, and a flow-limiting hole is opened on the inner side of the rubber duckbill valve. The flow-limiting hole is connected to the spiral groove through the inner side of the rubber duckbill valve.

[0013] Control method for multi-point synchronous inkjet printing device based on intelligent printing of pharmaceutical packaging; Step 1: When printing on multiple medicine bottles simultaneously, the medicine bottle is inserted into the expansion port. After the medicine bottle contacts the bottom end of the expansion port on the cylinder shell, the medicine bottle will fit against the inner side of the rubber ring. The servo motor is started to drive the cap shell to rotate, and the cap shell drives the rack assembly to rotate. The rack assembly meshes with the gear, and the extension column and the support column rotate simultaneously. The support column is rotatably connected to the inside of the cylinder shell through ball bearings. The cylinder shell is fixed to the base plate. The rotation of the extension column pulls the spring, and the spring generates elastic force. The support column drives the medicine bottle to rotate through friction. The print head prints on the surface of the medicine bottle. The rack assembly moves away from the gear, and the torque of the spring resets the extension column. There are stops on the inner side of the cylinder shell and the outer side of the support column. The electric hydraulic cylinder is started to drive the base plate, guide column, and rotary drive assembly to move downward. The base plate also drives the internal structure to move downward. The guide column slides inside the guide hole. After moving the required distance, it rotates the medicine bottle. Step Two: To prevent the medicine bottle from rotating due to inertia during reset, the gear drives the load-bearing mechanism and the extension column to rotate, causing the spiral column to rotate. The axis of the spiral column coincides with the axis of the extension column. As the spiral column rotates, it spirals into the spiral groove, causing the column block to move upward. The extension column drives the fixing plate to move upward, and the air inside the spiral groove is discharged through the rubber duckbill valve. When the spring spring returns the extension column to its reset position, the column block moves downward, and external air enters the rubber duckbill valve and the spiral groove through the flow-limiting orifice. The flow-limiting orifice restricts the gas flow rate, reducing the reset speed of the column block, spiral column, extension column, and load-bearing mechanism.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by setting a bearing, an expansion port and a rubber ring, the device can ensure that the bottle body rotates stably during the printing process, avoiding inaccurate printing position or poor printing quality due to unstable rotation. At the same time, it reduces the increased cost and maintenance difficulty due to the complex structure of the equipment, and effectively improves printing efficiency and product quality. 2. In this invention, by setting up a support printing component, a rotary drive component, and an assembly positioning component, the device uses an electric drive mechanism and a hydraulic drive structure to drive multiple components to work together, thereby avoiding full-scale printing on the medicine bottle. This effectively avoids the complex design of traditional multi-drive mechanisms. This approach not only significantly reduces the size and cost of the equipment, but also reduces the risk of system failure and maintenance costs caused by multiple drive mechanisms, making the equipment more economical and practical in long-term operation. It provides an efficient, stable, and low-cost solution for the printing process of pharmaceutical packaging. 3. In this invention, by setting a speed control component, the device significantly reduces the reset speed through a gas flow rate limiting device, preventing the bottle body from detaching or twisting due to excessively fast reset rotation, effectively protecting the bottle body and ensuring the integrity of the bottle body and the printing quality after printing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall exploded structure of the present invention; Figure 3 This is a schematic diagram of the structure supporting the inkjet printing assembly of the present invention; Figure 4 This is a schematic diagram of the rotary drive component structure of the present invention; Figure 5 This is a cross-sectional structural diagram of the assembly and positioning component of the present invention; Figure 6 This is a schematic diagram of the cylindrical shell structure of the present invention; Figure 7 This is an exploded view of the assembly and positioning component of the present invention; Figure 8 This is a schematic diagram of the speed control component structure of the present invention; Figure 9 This is a cross-sectional structural diagram of the speed control component of the present invention.

[0016] In the diagram: 1. Machine drive assembly; 11. Workbench; 12. Support frame; 13. Guide hole; 14. Arch frame; 15. Electric hydraulic cylinder; 2. Support for the printing assembly; 21. Base plate; 22. Assembly port; 23. Guide column; 24. Positioning arc plate; 25. Printing head; 3. Rotary drive assembly; 31. Servo motor; 32. Cap housing; 33. Machine slot; 34. Rack and pinion assembly; 4. Assembly positioning components; 41. Cylinder shell; 42. Clock spring; 43. Ball bearing; 44. Bearing assembly; 45. Extension column; 46. Expansion port; 47. Rubber ring; 48. Gear; 5. Speed ​​control assembly; 51. Spiral column; 52. Rubber sealing ring; 53. Spiral groove; 54. Column block; 55. Rubber duckbill valve; 56. Flow limiting orifice; 57. Fixing plate; 58. Telescopic rod; 6. Medicine bottles. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Please see Figures 1-9 The present invention provides a technical solution: The multi-point synchronous inkjet printing device and its control method based on intelligent printing of pharmaceutical packaging include a machine drive assembly 1, a support inkjet printing assembly 2 slidably connected to the inner side of the machine drive assembly 1, a rotary drive assembly 3 fixedly connected to one end of the support inkjet printing assembly 2, an assembly positioning assembly 4 fixedly connected to the inner side of the support inkjet printing assembly 2, a speed control assembly 5 fixedly connected to the bottom end of the assembly positioning assembly 4, and a pharmaceutical bottle 6 inserted inside the assembly positioning assembly 4. The support inkjet printing assembly 2 includes a base plate 21, an electric drive mechanism fixedly connected to the bottom end of the base plate 21, a hydraulic drive structure fixedly connected to the top end of the base plate 21, the bottom end of the electric drive mechanism fixedly connected to the inner side of the machine slot 33, the machine slot 33 being opened inside the cap shell 32, multiple sets of rack assemblies 34 fixedly connected to the outer side of the cap shell 32, a gap to prevent friction between the top end of the cap shell 32 and the bottom end of the base plate 21, a cylindrical shell 41 fixedly connected to the inner side of the assembly port 22 opened in the base plate 21, and an extension column 45 fixedly connected to the inner side of the cylindrical shell 41 by a spring 42.

[0020] As a further implementation of this solution, the machine tool drive assembly 1 includes a worktable 11, a support frame 12 fixedly connected to the bottom of the worktable 11, a guide hole 13 opened on the inner side of the worktable 11, a guide column 23 slidably connected to the inner side of the guide hole 13, a base plate 21 fixedly connected to the top of the guide column 23, and a servo motor 31 fixedly connected to the bottom of the base plate 21. Through the above arrangement, the sliding connection between the worktable 11 and the guide column 23 provides stable mechanical support and motion guidance for the device, ensuring that each component maintains a precise relative position during movement, and improving the overall stability and reliability of the device. As a further implementation of this solution, an arch frame 14 is fixedly connected to the top of the workbench 11. The inner side of the arch frame 14 is fixedly connected to the cylinder body of the electric hydraulic cylinder 15. The end of the piston rod of the electric hydraulic cylinder 15 is fixedly connected to the top of the base plate 21. A gap is provided between the arch frame 14 and the base plate 21. Through the above arrangement, this structural design uses the electric hydraulic cylinder 15 to realize the up and down movement of the base plate 21, providing stable power output. At the same time, the gap between the arch frame 14 and the base plate 21 provides sufficient space for the movement of the components, avoids interference between components, and ensures smooth movement. As a further implementation of this solution, a positioning arc plate 24 is sleeved on the outer side of the base plate 21. A printing head 25 is fixedly connected to the top of the positioning arc plate 24. The positioning arc plate 24 is fixedly connected to the arch frame 14. The nozzle of the printing head 25 faces the medicine bottle 6. Through the above settings, the sleeve structure of the positioning arc plate 24 provides a stable installation position for the printing head 25, ensuring that the printing head 25 remains stable during the printing process. The design of the nozzle facing the medicine bottle 6 can accurately print on the bottle body. As a further implementation of this solution, a ball bearing 43 is fixedly connected to the inner side of the cylindrical shell 41. The inner side of the ball bearing 43 is fixedly engaged with the bearing 44. The bearing 44 extends to the upper end of the cylindrical shell 41, and the cylindrical shell 41 extends to the lower end of the bearing 44. The cylindrical shell 41 is rotatably engaged with the bearing 44 through the ball bearing 43. Through the above arrangement, the friction during the rotation process is reduced, the stability and accuracy of the rotation are improved, and the service life of the components is extended. As a further implementation of this solution, a gear 48 is fixedly connected to the outside of the extension column 45. The gear 48 is located at the lower end of the cylindrical shell 41. The outside of the gear 48 can mesh with the rack assembly 34. The outside of the gear 48 is clearance-fitted with the cap shell 32. Through the above arrangement, the meshing design of the gear 48 and the rack assembly 34 realizes the efficient transmission of power and ensures the stable rotation of the extension column 45. The clearance fit between the gear 48 and the cap shell 32 avoids excessive friction between components, improves transmission efficiency, and reduces energy loss. As a further implementation of this solution, the upper end of the support 44 is provided with an expansion port 46, and a rubber ring 47 is fixedly connected to the inner side of the expansion port 46. The upper end of the expansion port 46 is designed to be flared, and the expansion port 46 is inserted into the medicine bottle 6 for insertion and cooperation. The inner side of the rubber ring 47 is tightly fitted to the medicine bottle 6. Through the above settings, the flared design of the expansion port 46 and the tight fitting structure of the rubber ring 47 provide stable support and guidance for the medicine bottle 6, ensuring that the bottle body remains stable during the printing process, avoiding inaccurate printing position due to unstable rotation, and improving the printing quality. As a further implementation of this solution, a spiral column 51 is fixedly connected to the bottom end of the extension column 45. The spiral column 51 has a spiral structure, and a rubber sealing ring 52 is fixedly connected to the outside of the spiral column 51. The spiral column 51 is spirally installed inside the spiral groove 53. The outside of the rubber sealing ring 52 fits against the inside of the spiral groove 53. The spiral groove 53 is opened on the inside of the column block 54. A fixing plate 57 is fixedly connected to the outside of the column block 54. A telescopic rod 58 is fixedly connected to the top of the fixing plate 57. The top of the telescopic rod 58 is fixedly connected to the bottom end of the base plate 21. Through the above settings, the spiral structure of the spiral column 51 and the cooperation of the spiral groove 53 effectively control the reset speed by limiting the gas flow rate, preventing the bottle from detaching or twisting due to excessive reset speed, thus protecting the integrity of the bottle. At the same time, this structural design improves the automation level of the device, reduces manual intervention, and improves production efficiency. As a further implementation of this solution, a rubber duckbill valve 55 is fixedly connected to the front end of the column 54. A flow-limiting orifice 56 is opened on the inner side of the rubber duckbill valve 55. The flow-limiting orifice 56 is connected to the spiral groove 53 through the inner side of the rubber duckbill valve 55. Through the above settings, the structural design of the rubber duckbill valve 55 and the flow-limiting orifice 56 realizes the unidirectional flow of gas, ensures the stable control of gas flow rate during the reset process, further optimizes the adjustment of the reset speed, and improves the reliability of the device and the printing quality.

[0021] Workflow: When feeding multiple medicine bottles 6, insert the medicine bottle 6 into the expansion port 46. The flared design of the expansion port 46 guides the medicine bottle 6 until it contacts the bottom of the expansion port 46 on the shell 41. During this process, the medicine bottle 6 will fit against the inside of the rubber ring 47. The design of the rubber ring 47 can increase the friction with the outside of the medicine bottle 6, which improves the stability of the rotation of the medicine bottle 6 later. Align the edge of the medicine bottle 6 where it needs to be printed with the printing head 25. When printing on multiple medicine bottles 6 simultaneously, the servo motor 31 is activated to rotate the cap 32, which in turn rotates the rack assembly 34. Through the meshing of the rack assembly 34 and the gear 48, the extension column 45 and the support frame 44 rotate simultaneously. The support frame 44 is rotatably connected to the inside of the cylindrical shell 41 via a ball bearing 43, reducing friction and improving stability during rotation. Since the cylindrical shell 41 is fixed to the base plate 21, the rotation of the extension column 45 pulls on the spring 42, causing it to elastically store force. This force, combined with the frictional force, drives the medicine bottles 6 to rotate when the support frame 44 rotates. Simultaneously, the print head 25 prints on the surface of the medicine bottles 6, covering a horizontal range. The printing is performed on the rack assembly 34 and the gear 48. After separation, the torque of the spring 42 is used to reset the bearing 44. Blocks are provided on the inner side of the cylinder shell 41 and the outer side of the bearing 44 to prevent the bearing 44 from rotating excessively, thereby achieving the angle reset of the medicine bottle 6. The electric hydraulic cylinder 15 is activated to drive the base plate 21, guide column 23, and rotary drive assembly 3 to move downward. The base plate 21 will drive the internal structure to move downward as well. The guide column 23 slides inside the guide hole 13. After moving the required distance, the medicine bottle 6 is rotated again by the above principle until multiple positions or all of the medicine bottle 6 are printed. This driving method avoids the investment of using multiple drive mechanisms, reduces the equipment's volume and cost, and thus reduces system failure and maintenance costs. To prevent the medicine bottle 6 from rotating due to the inertia of resetting, similar to the above principle, when gear 48 drives the bearing 44 and extension column 45 to rotate, it will also drive the spiral column 51 to rotate. The axis of the spiral column 51 coincides with the axis of the extension column 45. When the spiral column 51 rotates, it spirals into the interior of the spiral groove 53. At the same time, the column block 54 moves upward, and the extension column 45 drives the fixing plate 57 to move upward. The telescopic rod 58 guides the movement of the column block 54. Through the sealing of the rubber sealing ring 52, the air inside the spiral groove 53 will be discharged through the rubber duckbill valve 55. The rubber duckbill valve 55 can expel air from the inside of the spiral groove 53 but cannot enter from the port of the spiral groove 53. When the rubber sealing ring 52 is reset by the torque of the spring 42, the column block 54 moves downward. External air will enter the rubber duckbill valve 55 and the spiral groove 53 through the flow limiting hole 56. During this process, the flow limiting hole 56 restricts the gas flow rate, thereby significantly reducing the reset speed of the column block 54, the spiral column 51, the extension column 45 and the bearing 44. This can prevent the medicine bottle 6 from detaching or twisting due to the excessive reset rotation speed of the bearing 44, thus ensuring the quality of printing on the medicine bottle 6.

[0022] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging, comprising a machine drive assembly (1), characterized in that: The machine drive assembly (1) is slidably connected to the inner side of the support inkjet assembly (2), and one end of the support inkjet assembly (2) is fixedly connected to the rotary drive assembly (3). The support inkjet assembly (2) is fixedly connected to the inner side of the support inkjet assembly (2), and the bottom end of the assembly positioning assembly (4) is fixedly connected to the speed control assembly (5). A medicine bottle (6) is inserted into the inner side of the assembly positioning assembly (4). The supporting inkjet printing assembly (2) includes a base plate (21), an electric drive mechanism is fixedly connected to the bottom end of the base plate (21), and a hydraulic drive structure is fixedly connected to the top end of the base plate (21). The bottom end of the electric drive mechanism is fixedly connected to the inner side of the slot (33), the slot (33) is opened on the inner side of the cap (32), and multiple sets of racks (34) are fixedly connected to the outer side of the cap (32). The top of the cap (32) and the bottom of the base plate (21) are spaced apart to prevent friction. The inner side of the assembly port (22) of the base plate (21) is fixedly connected to the cylindrical shell (41). The inner side of the cylindrical shell (41) is fixedly connected to the extension column (45) by a spring (42).

2. The multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging according to claim 1, characterized in that: The machine tool drive assembly (1) includes a workbench (11), a support frame (12) is fixedly connected to the bottom of the workbench (11), a guide hole (13) is opened on the inner side of the workbench (11), a guide column (23) is slidably connected to the inner side of the guide hole (13), a base plate (21) is fixedly connected to the top of the guide column (23), and a servo motor (31) is fixedly connected to the bottom of the base plate (21).

3. The multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging according to claim 2, characterized in that: An arch frame (14) is fixedly connected to the top of the workbench (11). The inner side of the arch frame (14) is fixedly connected to the cylinder body of the electric hydraulic cylinder (15). The end of the piston rod of the electric hydraulic cylinder (15) is fixedly connected to the top of the base plate (21). A gap is provided between the arch frame (14) and the base plate (21).

4. The multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging according to claim 1, characterized in that: The base plate (21) is fitted with a positioning arc plate (24) on the outside. A printing head (25) is fixedly connected to the top of the positioning arc plate (24). The positioning arc plate (24) is fixedly connected to the arch frame (14). The nozzle of the printing head (25) faces the medicine bottle (6).

5. The multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging according to claim 1, characterized in that: A ball bearing (43) is fixedly connected to the inner side of the cylindrical shell (41). The inner side of the ball bearing (43) is fixedly engaged with the bearing (44). The bearing (44) extends to the upper end of the cylindrical shell (41), and the cylindrical shell (41) extends to the lower end of the bearing (44). The cylindrical shell (41) is rotatably engaged with the bearing (44) through the ball bearing (43).

6. The multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging according to claim 1, characterized in that: A gear (48) is fixedly connected to the outside of the extension column (45). The gear (48) is located at the lower end of the cylindrical shell (41). The outside of the gear (48) can mesh with the rack assembly (34). The outside of the gear (48) is in clearance fit with the cap shell (32).

7. The multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging according to claim 5, characterized in that: The upper end of the bearing (44) is provided with an expansion port (46), and a rubber ring (47) is fixedly connected to the inner side of the expansion port (46). The upper end of the expansion port (46) is designed to be flared. The expansion port (46) is inserted into the medicine bottle (6) for connection and cooperation. The inner side of the rubber ring (47) is tightly fitted with the medicine bottle (6).

8. The multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging according to claim 1, characterized in that: The bottom end of the extension column (45) is fixedly connected to a spiral column (51). The spiral column (51) is spiral in shape. A rubber sealing ring (52) is fixedly connected to the outside of the spiral column (51). The spiral column (51) is spirally installed inside the spiral groove (53). The outside of the rubber sealing ring (52) is in contact with the inside of the spiral groove (53). The spiral groove (53) is opened on the inside of the column block (54). A fixing plate (57) is fixedly connected to the outside of the column block (54). A telescopic rod (58) is fixedly connected to the top of the fixing plate (57). The top of the telescopic rod (58) is fixedly connected to the bottom end of the base plate (21).

9. The multi-point synchronous inkjet printing device based on intelligent printing for pharmaceutical packaging according to claim 8, characterized in that: A rubber duckbill valve (55) is fixedly connected to the front end of the column block (54). A flow-limiting hole (56) is opened on the inner side of the rubber duckbill valve (55). The flow-limiting hole (56) is connected to the spiral groove (53) through the inner side of the rubber duckbill valve (55).

10. A control method for a multi-point synchronous inkjet printing device for intelligent printing of pharmaceutical packaging according to any one of claims 1-9, characterized in that: Step 1: When printing on multiple medicine bottles (6) simultaneously, the medicine bottles (6) are inserted into the expansion port (46). After the medicine bottles (6) contact the bottom end of the expansion port (46) opened on the cylindrical shell (41), the medicine bottles (6) will fit against the inner side of the rubber ring (47). The servo motor (31) is started to drive the cap (32) to rotate. The cap (32) drives the rack assembly (34) to rotate. The rack assembly (34) meshes with the gear (48). The extension column (45) and the bearing (44) rotate simultaneously. The bearing (44) is rotatably connected to the inside of the cylindrical shell (41) through the ball bearing (43). The cylindrical shell (41) is fixed to the base plate (21). The rotation of the extension column (45) affects the spring spring (42). When the spring (42) is pulled, the spring (44) generates elastic energy, and the bearing (44) drives the medicine bottle (6) to rotate through friction. The inkjet head (25) prints on the surface of the medicine bottle (6). The rack group (34) moves away from the gear (48), and the torque of the spring (42) resets the bearing (44). There are blocks on the inner side of the cylinder shell (41) and the outer side of the bearing (44). The electric hydraulic cylinder (15) is started to drive the base plate (21), guide column (23), and rotary drive assembly (3) to move downward. The base plate (21) also drives the internal structure to move downward. The guide column (23) slides inside the guide hole (13). After moving the required distance, the medicine bottle (6) rotates. Step 2: To prevent the medicine bottle (6) from rotating due to the inertia of resetting, when the gear (48) drives the bearing (44) and the extension column (45) to rotate, the spiral column (51) rotates. The axis of the spiral column (51) coincides with the axis of the extension column (45). When the spiral column (51) rotates, the spiral column (51) will spiral into the interior of the spiral groove (53). The column block (54) will move upward. The extension column (45) drives the fixing plate (57) to move upward. The air inside the spiral groove (53) will be discharged through the rubber duckbill valve (55). When the torque of the spring (42) resets the rubber sealing ring (52), the column block (54) moves downward. The external air will enter the interior of the rubber duckbill valve (55) and the spiral groove (53) through the flow limiting hole (56). The flow limiting hole (56) restricts the gas flow rate and reduces the reset speed of the column block (54), the spiral column (51), the extension column (45) and the bearing (44).

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