Extrusion medicine conveying mechanism and liquid medicine conveying device of double-cavity injector

Abstract

The utility model discloses an extrusion medicine conveying mechanism and a liquid medicine conveying device of a double-cavity injector, and belongs to the technical field of liquid medicine conveying. The device is characterized in that the device comprises two rotating parts which are symmetrically arranged and a driving part which drives the two rotating parts to rotate, the two rotating parts are each provided with an extrusion cylinder (19), the two extrusion cylinders (19) are symmetrically arranged, and the two extrusion cylinders (19) revolve around rotating shafts of the rotating parts respectively; the medicine conveying hose passes through the two extrusion barrels (19), and the two extrusion barrels (19) move in a reciprocating mode in the arrangement direction of the medicine conveying hose. According to the extrusion medicine conveying mechanism and the medicine liquid conveying device of the double-cavity injector, the problems that in the prior art, adjustment is frequent, the cleaning and dismounting time is long, filling pumps needed by different viscosities are customized in a personalized mode, and a conveying mechanism is too complex are solved, and the effects that assembling is convenient and fast, debugging is convenient, and the production efficiency is improved are achieved; therefore, the medication safety is further ensured.

Description

Technical Field

[0001] A squeezing infusion mechanism and a drug delivery device for a dual-chamber syringe belong to the field of drug delivery technology. Background Technology

[0002] Currently, dual-chamber syringes, pre-filled needles, cartridge vials, and vials are mainly used in the vaccine and medical aesthetics industries. Users can easily inject the medication with simple operations, making them widely popular. However, pharmaceutical companies face numerous challenges in production, including high raw material costs, dripping and leakage during the filling process, unstable filling accuracy, and unstable equipment operation, all of which negatively impact yield and production efficiency.

[0003] Currently, there are various forms of liquid drug delivery and filling available on the market, mainly including the following solutions:

[0004] (1) Peristaltic pump, such as the technical solution disclosed in Chinese Utility Model Patent Application No. 202322277655.0, filed on August 23, 2023, entitled "A Linear Peristaltic Pump". The peristaltic pump delivers fluid by alternately squeezing and releasing the tubing. The drawback of the peristaltic pump solution is that it delivers fluid by alternately squeezing and releasing the silicone tubing. The peristaltic pump requires frequent adjustments during operation to meet the filling requirements, resulting in low precision, poor stability, and unsuitability for high-precision filling.

[0005] (2) Plunger pumps, such as the technical solution disclosed in the Chinese Utility Model Patent No. 202320179126.4, filed on February 8, 2023, entitled "Large-volume Dual-Cavity Pre-filled Injection Container Filling and Freeze-drying Production Line". The plunger pump is mainly a ceramic plunger pump, which realizes the filling of medicine by changing the volume of the sealed working cavity through the reciprocating motion of the plunger in the cylinder. The ceramic plunger pump realizes filling by the reciprocating motion of the plunger in the cylinder. Its advantage is that the motion principle of the ceramic plunger pump is clear and easy to understand, the reciprocating motion is highly accurate and consistent, so that the filling accuracy of the medicine is high and no multiple adjustments are required during operation. However, the problems are: there is a high shear force during operation, the cleaning and disassembly time is long and cumbersome, and personalized customization is required for medicines of different viscosities, which restricts its development to a certain extent.

[0006] (3) Pump-free filling. Pump-free filling relies on double rollers squeezing the silicone tubing in a reciprocating linear motion to fill the medicine. While the double roller squeezing is convenient, its transmission mechanism, composed of many small parts, is too complex, and assembly and debugging are difficult. When equipment malfunctions, it can only be debugged by the original manufacturer's technicians, which takes a long time and affects production progress. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a squeezing delivery mechanism and a liquid delivery device for a dual-chamber syringe that avoids the problems of frequent adjustment, long cleaning and disassembly time, personalized customization of filling pumps for different viscosities, and overly complex transfer mechanism in the prior art. It achieves the effects of convenient assembly, convenient debugging, and improved production efficiency, thereby further ensuring the safety of drug use.

[0008] The technical solution adopted by this utility model to solve its technical problem is: the extrusion drug delivery mechanism is characterized by: including two symmetrically arranged rotating parts and a driving member that drives the two rotating parts to rotate, and an extrusion cylinder is respectively arranged on the two rotating parts. The two extrusion cylinders are symmetrically arranged and revolve around the rotation axis of their respective rotating parts. The drug delivery hose passes through the two extrusion cylinders and the two extrusion cylinders reciprocate along the arrangement direction of the drug delivery hose.

[0009] Preferably, the driving component is an extrusion motor that drives the rotating part to rotate, and the motor shaft of the extrusion motor is connected to the rotating shaft of the rotating part.

[0010] Preferably, the rotating part is an eccentric shaft, and the two extrusion cylinders are respectively fixed coaxially with the eccentric columns of the two eccentric shafts; the two eccentric shafts are each driven to rotate by a driving component.

[0011] Preferably, a connecting plate is provided, and a fixing plate is vertically fixed at one end of the connecting plate. The extrusion motor is fixed on the surface of the connecting plate, and the extrusion cylinder is located on the outside of the connecting plate.

[0012] Preferably, a lifting shaft is fixed to the bottom of the connecting plate by a fixing seat.

[0013] A drug delivery device for a dual-chamber syringe includes a cabinet with a lifting mechanism inside the cabinet. The device is characterized by having multiple squeezing delivery mechanisms arranged side by side, each squeezing delivery mechanism extending from the surface of the cabinet to the interior of the cabinet and connected to a corresponding lifting mechanism. A delivery mechanism is provided on the surface of the cabinet, and the delivery hose in the delivery mechanism passes through two squeezing cylinders of the squeezing delivery mechanism.

[0014] Preferably, the drug delivery mechanism includes a storage tank for holding the drug solution, a dispensing tube extending horizontally from the bottom of the storage tank, an output connector provided on the side of the dispensing tube, and a drug delivery hose connected to the output connector.

[0015] Preferably, a connector group corresponding to the extrusion drug delivery mechanism is provided on the surface of the cabinet, and the connector group is connected to the output connector; the connector group includes an upper connector and a lower connector, and a section of the drug delivery hose of the upper connector and the lower connector passes through the two extrusion cylinders.

[0016] Preferably, the lifting mechanism includes a servo motor corresponding to the extrusion drug delivery mechanism, a lead screw is fixed at the motor shaft of the servo motor, and a lifting block is provided that is threadedly connected to the lead screw. The lifting shaft in the extrusion drug delivery mechanism is connected to the lifting block.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] The extrusion delivery mechanism and the liquid delivery device of the dual-chamber syringe in this application avoid the problems of frequent adjustment, long cleaning and disassembly time, personalized customization of filling pumps for different viscosities, and overly complex transfer mechanisms in the prior art. They achieve the effects of convenient assembly, easy debugging, and improved production efficiency, thereby further ensuring medication safety.

[0019] The compression delivery mechanism and the liquid delivery device of the dual-chamber syringe of this application achieve liquid delivery through a dual compression cylinder. Its delivery mechanism is simple, easy to maintain, linearly driven, and relies on the compression cylinder to compress the silicone tubing, thus avoiding problems such as cross-contamination and low shear force.

[0020] The system is designed with different specifications for different filling volumes and drug viscosities. Simply changing this specification part can meet the needs of different filling volumes. It is also easy to clean and disassemble.

[0021] The complex transmission mechanism is omitted; the hollow shaft and dual motors work together to complete the roller lifting and clamping actions, thus completing the entire filling process. The equipment is small in size, simple in structure, and easy to assemble and debug.

[0022] The dual motors work together to ensure precise and stable control, avoiding the impact of loose mechanical structures on filling accuracy.

[0023] Simply changing the silicone tubing and fittings of different specifications can meet the filling needs of different products, avoiding cross-contamination between medications and ensuring safer medication use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the drug delivery device for a dual-chamber syringe.

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0026] Figure 3 This is a schematic diagram of the compression delivery mechanism of a dual-chamber syringe.

[0027] The components include: 1. Support frame; 2. Extrusion drug delivery mechanism; 3. Upper connector; 4. Fixing block; 5. Liquid storage tank; 6. Cabinet; 7. Servo motor; 8. Fixing frame; 9. Dispensing tube; 10. Output connector; 11. Lower connector; 12. Worktable; 13. Lifting shaft; 14. Lead screw; 15. Guide shaft; 16. Lifting block; 17. Fixing seat; 18. Connecting plate; 19. Extrusion cylinder; 20. Eccentric shaft; 21. Fixing plate; 22. Coupling; 23. Extrusion motor. Detailed Implementation

[0028] Figures 1-3 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-3 The present invention will be further described below.

[0029] Example 1:

[0030] like Figure 1 As shown, a drug delivery device for a dual-chamber syringe includes a cabinet 6, the surface of which is a workbench 12. A storage tank 5 is provided on one side of the workbench 12, and the storage tank 5 contains drug solution. A dispensing tube 9 is provided at the bottom outlet of the storage tank 5, and the dispensing tube 9 is horizontally arranged on the front side of the cabinet 6. Multiple output connectors 10 are spaced apart on the side of the dispensing tube 9.

[0031] A support 1 is installed on the rear side of the cabinet 6. The top of the support 1 is located above the workbench 12. Multiple fixing blocks 4 are evenly arranged on the horizontal section of the top of the support 1. Each fixing block 4 on the upper part of the support 1 contains an upper connector 3. Multiple fixing blocks 4 are also arranged on the surface of the workbench 12. A fixing rod is horizontally fixed on the surface of the workbench 12. Multiple fixing blocks 4 are arranged sequentially on the front side of the fixing rod. Each fixing block 4 contains a lower connector 11. The upper connector 3 and the lower connector 11 below it correspond one-to-one in the vertical direction. The corresponding upper connector 3 and lower connector 11 form a connector group. Each connector group also corresponds one-to-one with the output connector 10 on the side of the dispensing tube 9.

[0032] Both the upper connector 3 and the lower connector 11 are provided with two interfaces, one at the top and one at the bottom. The first section of the infusion tubing connects the output connector 10 and the interface at the bottom of the lower connector 11. The second section of the infusion tubing connects the interface at the top of the lower connector 11 and the interface at the bottom of the upper connector 3. One end of the third section of the infusion tubing connects to the interface at the top of the upper connector 3, and the other end is the output end of the liquid medicine.

[0033] A compression delivery mechanism 2 is installed on the rear side of each set of connectors. The compression delivery mechanism 2 extends downward through the worktable 12 and into the interior of the cabinet 6. A fixing frame 8 is horizontally installed inside the cabinet 6. Multiple servo motors 7 are arranged vertically and are arranged side by side at the bottom of the fixing frame 8. Each servo motor 7 corresponds to a compression delivery mechanism 2. The compression delivery mechanism 2 is connected to its corresponding counterpart inside the cabinet 6. The servo motors 7 drive the corresponding compression delivery mechanism 2 to rise and fall on the surface of the worktable 12.

[0034] Combination Figure 2 Multiple guide shafts 15, each corresponding to a servo motor 7, are erected at the front end of the upper surface of the fixed frame 8. A lead screw 14 is installed on the rear side of each guide shaft 15. The motor shaft of the servo motor 7 passes through the fixed frame 8 and is coaxially fixed with the corresponding lead screw 14. A lifting block 16 is horizontally installed on the surface of the fixed frame 8. Each guide shaft 15 and its rear lead screw 14 pass through the corresponding lifting block 16. The guide shaft 15 is slidably connected to the lifting block 16, and the lead screw 14 is threadedly connected to the lifting block 16. The compression drug delivery mechanism 2 extends into the cabinet 6 and is fixed on the rear side of the lifting block 16.

[0035] When the servo motor 7 rotates, it drives the lead screw 14 to rotate. The lead screw 14 further drives the lifting block 16 to rise and fall under the action of the guide shaft 15, thereby driving the extrusion drug delivery mechanism 2 to rise and fall on the surface of the worktable 12.

[0036] Combination Figure 3 The compression drug delivery mechanism 2 includes a fixed base 17, with a lifting shaft 13 coaxially fixed at the bottom of the fixed base 17. The lifting shaft 13 is fixed to the lifting block 16 inside the cabinet 6. A connecting plate 18 is horizontally arranged at the top of the fixed base 17, and a fixed plate 21 is vertically fixed at one end of the connecting plate 18. Two compression motors 23 are arranged side by side on the surface of the connecting plate 18. The lifting shaft 13 is a hollow shaft, and the wires used to control the operation of the compression motors 23 pass through the center of the lifting shaft 13.

[0037] The motor shafts of the two extrusion motors 23 are each connected to an eccentric shaft 20 via a coupling 22. The motor shafts of the extrusion motors 23 are coaxially fixed with the main shaft of the eccentric shaft 20. The eccentric column of the eccentric shaft 20 is located outside the connecting plate 18, and extrusion cylinders 19 are coaxially fixed at the eccentric columns of the two eccentric shafts 20. The two extrusion cylinders 19 are mirror-symmetrical about the centerline of the two extrusion motors 23. The aforementioned drug delivery tubing connecting the upper connector 3 and the lower connector 11 passes between the extrusion cylinders 19 on both sides.

[0038] The specific working process and working principle are as follows:

[0039] The liquid medicine is discharged from the storage tank 5, then through the distribution pipe 9 and the output connector 10. After being discharged, the liquid medicine is delivered through the delivery hose. The delivery hose passes through the two extrusion cylinders 19 of the extrusion delivery mechanism 2. The two extrusion motors 23 operate, driving the two extrusion cylinders 19 to rotate synchronously. When the two extrusion cylinders 19 are at their minimum distance under the action of the eccentric shaft 20, the delivery hose is clamped.

[0040] The servo motor 7 inside the cabinet 6 rotates, and when the servo motor 7 rotates, it drives the lifting block 16 to rise and fall through the lead screw 14, which in turn drives the extrusion drug delivery mechanism 2 to rise and fall. According to the pre-calculation, the rising distance of the extrusion drug delivery mechanism 2 is controlled to achieve quantitative delivery of the drug liquid.

[0041] Example 2:

[0042] The difference between this embodiment and Embodiment 1 lies in the structure that drives the two extrusion cylinders 19 to rotate. In this embodiment, two meshing gears are provided, and the main shafts of the two eccentric shafts 20 are coaxially fixed with the axles of the corresponding gears. Only one extrusion motor 23 is provided to drive one of the gears, thereby achieving the effect of simultaneously driving the two extrusion cylinders 19 to rotate synchronously.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its scope of protection shall still fall within the protection scope of this utility model.

Claims

1. A compression drug delivery mechanism, characterized in that: It includes two symmetrically arranged rotating parts and a driving component that drives the two rotating parts to rotate. Each of the two rotating parts is provided with a squeezing cylinder (19). The two squeezing cylinders (19) are symmetrically arranged and revolve around the rotation axis of their respective rotating parts. The drug delivery hose passes through the two squeezing cylinders (19) and the two squeezing cylinders (19) move back and forth along the arrangement direction of the drug delivery hose.

2. The extrusion delivery mechanism according to claim 1, characterized in that: The driving component is an extrusion motor (23) that drives the rotating part to rotate, and the motor shaft of the extrusion motor (23) is connected to the rotating shaft of the rotating part.

3. The extrusion delivery mechanism according to claim 1 or 2, characterized in that: The rotating part is an eccentric shaft (20), and the two extrusion cylinders (19) are fixed coaxially with the eccentric columns of the two eccentric shafts (20); the two eccentric shafts (20) are driven to rotate by a driving component.

4. The extrusion delivery mechanism according to claim 2, characterized in that: A connecting plate (18) is provided, and a fixing plate (21) is vertically fixed at one end of the connecting plate (18). The extrusion motor (23) is fixed on the surface of the connecting plate (18), and the extrusion cylinder (19) is located on the outside of the connecting plate (18).

5. The extrusion delivery mechanism according to claim 4, characterized in that: A lifting shaft (13) is fixed at the bottom of the connecting plate (18) by a fixing seat (17).

6. A drug delivery device for a dual-chamber syringe equipped with the squeezing delivery mechanism according to any one of claims 1 to 5, comprising a cabinet (6), wherein a lifting mechanism is provided inside the cabinet (6), characterized in that: Multiple compression delivery mechanisms are arranged side by side. The compression delivery mechanism extends from the surface of the cabinet (6) to the interior of the cabinet (6) and is connected to the corresponding lifting mechanism. A delivery mechanism is provided on the surface of the cabinet (6). The delivery hose in the delivery mechanism passes through the two compression cylinders (19) of the compression delivery mechanism.

7. The drug delivery device for a dual-chamber syringe according to claim 6, characterized in that: The drug delivery mechanism includes a storage tank (5) for holding the drug solution, a dispensing pipe (9) extending horizontally from the bottom of the storage tank (5), an output connector (10) provided on the side of the dispensing pipe (9), and a drug delivery hose connected to the output connector (10).

8. The drug delivery device for a dual-chamber syringe according to claim 7, characterized in that: On the surface of the cabinet (6), there are connector groups corresponding to the extrusion delivery mechanism. The connector groups are connected to the output connector (10). The connector groups include an upper connector (3) and a lower connector (11). A section of the delivery hose of the upper connector (3) and the lower connector (11) passes through the two extrusion cylinders (19).

9. The drug delivery device for a dual-chamber syringe according to claim 6, characterized in that: The lifting mechanism includes a servo motor (7) corresponding to the extrusion delivery mechanism. A lead screw (14) is fixed at the motor shaft of the servo motor (7), and a lifting block (16) is provided that is threadedly connected to the lead screw (14). The lifting shaft (13) in the extrusion delivery mechanism is connected to the lifting block (16).

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