A table type pre-filled needle vacuum stoppering machine

Abstract

The application discloses a table type pre-filled needle vacuum stoppering machine, which comprises a main frame for supporting a stoppering machine body and controlling the movement of relevant structures; a lifting system for controlling the lifting of a rubber plug pressing rod lifting device and a vacuum cavity lifting device; a pre-filled needle assembly for placing pre-filled needles; and a reset button for resetting the lifting system and an adjusting system for changing the vacuum value of a vacuum pump on the main frame. The table type pre-filled needle vacuum stoppering machine has the advantages of vacuum stoppering, small noise and strong adjustability.

Description

Technical Field

[0001] This invention relates to the field of pre-filled needle plugging technology, and in particular to a tabletop pre-filled needle vacuum plugging machine. Background Technology

[0002] Regarding the insertion of stoppers into pre-filled syringes, the most commonly used method is mechanical insertion. This involves inserting a hollow, thin-walled sleeve above the liquid surface in the pre-filled syringe, placing a rubber stopper at the upper end of the sleeve, and then pressing the stopper into the syringe using a pressure rod. This method presents two problems: first, the stopper deforms as it passes through the hollow sleeve, and stopper fragments can easily fall into the syringe and contaminate the medication; second, mechanical insertion creates an air bubble between the liquid surface and the stopper. When using the pre-filled syringe, this bubble must be expelled first, but due to the difficulty in controlling the process, some medication may also be expelled, resulting in significant losses, especially for expensive medications. Furthermore, if the air is not completely expelled and injected into the body, it can be harmful. Therefore, a vacuum insertion method is necessary.

[0003] Another method of stoppering, such as the "vacuum stoppering machine for pre-filled glass syringes" disclosed in Chinese patent literature (publication number CN202785556U), involves placing the entire tray of pre-filled syringes into a vacuum chamber for overall vacuuming and stoppering. This method has the following problems: First, it uses a vacuum generator for vacuuming, which is noisy, produces little negative pressure, requires an additional gas source, cannot be used in places without a gas source, and the vacuum level is not adjustable; second, it requires a custom mold for the stoppers; third, the pre-filled syringes are arranged from the first to the last, which takes a long time and exposes them to air for a longer period, making them prone to reacting with oxygen-sensitive drugs; fourth, the vacuum chamber has a guide sleeve that rubs back and forth with the shaft, and prolonged friction can generate debris that can easily fall into the drug; fifth, the main components are all inside the machine, making sterilization inconvenient. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems of air bubbles forming during mechanical plugging, high noise during vacuum plugging, and poor adjustability in the prior art. It provides a tabletop pre-filled needle vacuum plugging machine with advantages such as vacuum plugging, low noise, and high adjustability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A tabletop pre-filled needle vacuum plugging machine, comprising:

[0007] The main frame supports the main body of the stopper machine and controls the movement of related structures. The main frame is equipped with a reset button for resetting the lifting system and an adjustment system for changing the vacuum value of the vacuum pump.

[0008] The lifting system includes a rubber stopper lifting device and a vacuum chamber lifting device. The lifting system is mounted on the main frame and is used to control the lifting of the rubber stopper lifting device and the vacuum chamber lifting device. The vacuum chamber lifting device is equipped with a vacuum pump and a vacuum chamber, and the rubber stopper lifting device is equipped with a rubber stopper. The lifting system also includes a drive assembly for providing power. The drive assembly includes a first drive assembly for driving the rubber stopper lifting device and a second drive assembly for driving the vacuum chamber lifting device.

[0009] The pre-charge needle assembly is used to hold the pre-charge needles and is located below the lifting system.

[0010] In the above technical solution, clicking the reset button will automatically return the stopper lifting device and the vacuum chamber lifting device to their original positions. The vacuum value is adjusted according to the existing temperature, humidity, and liquid characteristics. The pre-filling needle is manually placed on the pre-filling needle assembly, and then the stopper is placed on the stopper lifting device. The second drive assembly is controlled to cause the vacuum chamber lifting device to descend. When the bottom of the vacuum chamber lifting device is tightly fitted with the pre-filling needle bottle opening, the vacuum chamber lifting device stops descending. At this point, the vacuum chamber is sealed with a stopper above and the pre-filling needle below, forming a closed space. The vacuum pump starts working and stops working when the set vacuum value is reached. Then, the first drive assembly is controlled to move the stopper lifting device, driving the stopper through the vacuum chamber into the pre-filling needle bottle opening. The vacuum pump stops working. Since there is no stopper above the vacuum chamber to form a sealed space, the vacuum is broken, and the stopper automatically enters the pre-filling needle under atmospheric pressure, reaching above the liquid surface. The stopper lifting device rises back to its initial position, and then the vacuum chamber lifting device rises back to its initial position. The entire process is complete. Because it has a built-in miniature vacuum pump, it does not require an external gas source and has the advantages of low noise, fast response speed, high vacuum degree, and wide applicability. In addition, the vacuum degree is adjustable and highly adaptable. Vacuum plugging also avoids the problem of air bubbles that can occur with mechanical plugging.

[0011] Preferably, the vacuum chamber lifting device includes a vacuum chamber mounting arm, a vacuum chamber lifting shaft, and a vacuum chamber lifting shaft support. The vacuum chamber lifting shaft support is mounted on the main frame, and the vacuum chamber lifting shaft is mounted on the vacuum chamber lifting shaft support. The vacuum chamber mounting arm is connected to the end of the vacuum chamber lifting shaft away from the vacuum chamber lifting shaft support. The vacuum pump is mounted inside the vacuum chamber mounting arm, thus improving the overall structure of the vacuum chamber lifting device. The vacuum chamber mounting arm is used to mount the vacuum chamber and the vacuum pump, the vacuum chamber lifting shaft support is used to support the vacuum chamber lifting device, and the vacuum chamber lifting shaft is used to drive the lifting movement of the vacuum chamber mounting arm, making the overall structure more stable.

[0012] Preferably, the rubber stopper lifting device includes a rubber stopper rod, a rubber stopper rod mounting arm, and a rubber stopper rod lifting shaft. The rubber stopper rod lifting shaft is mounted on the main frame, and the rubber stopper rod mounting arm is connected to the top of the rubber stopper rod lifting shaft. The rubber stopper rod is located at the end of the rubber stopper rod mounting arm away from the rubber stopper rod lifting shaft, thus improving the overall structure of the rubber stopper lifting device. The rubber stopper rod lifting shaft is connected to the rubber stopper rod through the rubber stopper rod mounting arm, and the rubber stopper rod achieves lifting and lowering movement under the drive of the rubber stopper rod lifting shaft, resulting in more stable movement.

[0013] Preferably, the pre-charge needle assembly includes a pre-charge needle bracket and a pre-charge needle support. The pre-charge needle support is mounted on the main frame, and the pre-charge needle bracket is mounted on the pre-charge needle support and located below the vacuum chamber lifting device. The pre-charge needle bracket cooperates with the pre-charge needle and may be provided with structures including, but not limited to, groove structures and snap-fit ​​structures for fixing the pre-charge needle. The pre-charge needle support is used to fix and support the pre-charge needle bracket, making the pre-charge needle assembly more stable.

[0014] Preferably, the bottom of the vacuum chamber mounting arm is provided with a vacuum chamber sleeve, the bottom of the vacuum chamber sleeve is provided with a vacuum silicone disc, and a rubber stopper is provided inside the vacuum chamber sleeve. The vacuum silicone disc fits tightly with the pre-filled needle bottle mouth to ensure sealing. The diameter of the rubber stopper rod is smaller than the inner diameter of the vacuum chamber sleeve and the inner diameter of the pre-filled needle. The rubber stopper rod presses the rubber stopper through the vacuum chamber sleeve and enters the pre-filled needle bottle mouth. The process has good sealing performance and good stoppering effect.

[0015] Preferably, the bottom of the vacuum chamber lifting shaft support is connected to a vacuum chamber lifting shaft seat, which is located inside the main frame. A vacuum lifting base plate is located below the vacuum chamber lifting shaft seat, and a vacuum lifting ball screw is connected to the bottom of the vacuum lifting base plate. The second drive assembly is located at the bottom of the vacuum lifting ball screw. The second drive assembly works with the vacuum lifting ball screw to drive the vacuum chamber lifting shaft. The vacuum chamber lifting shaft seat is used to stabilize the vacuum chamber lifting shaft support, and the vacuum lifting base plate is used to connect the vacuum chamber lifting shaft seat and the vacuum lifting ball screw, resulting in a more stable structure.

[0016] Preferably, the second drive assembly includes a pulley, a motor mounting bracket, and a stepper motor. The vacuum lifting ball screw is connected to the stepper motor via the pulley. The pulley includes a main synchronous pulley, a synchronous belt, and a driven synchronous pulley. The motor mounting bracket is fixed inside the main frame, and the stepper motor is mounted on the motor mounting bracket. The stepper motor drives the main synchronous pulley, which in turn drives the driven synchronous pulley via the synchronous belt, thereby driving the vacuum lifting ball screw to realize the movement of the vacuum chamber lifting shaft.

[0017] Preferably, the stopper lifting device further includes a stopper lifting connecting plate, a stopper ball screw, and a stopper lifting shaft seat. The stopper ball screw is connected to the bottom of the stopper lifting connecting plate, the stopper lifting connecting plate is located below the stopper lifting shaft, and the stopper lifting shaft seat is located below the stopper lifting connecting plate. The first drive assembly is located below the stopper ball screw, and the structure of the first drive assembly is the same as that of the second drive assembly, similar to the vacuum chamber lifting device. The first drive assembly, in conjunction with the stopper ball screw, drives the stopper lifting device to achieve lifting movement.

[0018] Preferably, the main frame is provided with an upper base plate, a middle base plate, and a lower base plate. The upper base plate is located on the top surface inside the main frame, the lower base plate is located on the bottom surface inside the main frame, and the middle base plate is located between the upper and lower base plates. An upper support column is provided between the upper and middle base plates, and a lower support column is provided between the middle and lower base plates. The three base plates, together with the upper and lower support columns, form the internal support frame of the main frame, enhancing the stability of the overall structure. At the same time, the middle base plate can also be used in conjunction with a vacuum lifting base plate to limit the lifting range of the vacuum chamber device, making it safer and more stable to use.

[0019] Preferably, the main frame also includes feet at the bottom of the main frame and a shell on the outer surface of the main frame. The feet facilitate the movement and placement of the entire device, and the shell protects the internal structure.

[0020] Preferably, the rubber plug lifting shaft and the vacuum chamber lifting shaft are installed in an interlocking manner, that is, the rubber plug lifting shaft passes through the vacuum chamber lifting shaft, and the two are concentric, saving installation space.

[0021] The present invention has the following advantages: (1) The tabletop pre-filled needle vacuum stopper has a built-in vacuum pump, which does not require an additional air source. It has the advantages of low noise, fast response speed, high vacuum degree and multiple applicable occasions; (2) The vacuum degree of the tabletop pre-filled needle vacuum stopper is adjustable. Different stopper vacuum degrees can be set according to different ambient temperature and humidity and different types of medicine liquids. It has strong adjustability; (3) Vacuum stoppering prevents air bubbles from being generated above the liquid surface. Stoppering can be done immediately after filling, reducing the exposure time of the medicine liquid in the air; (4) The main components that come into contact with the rubber stopper and pre-filled needle are modular quick-change type, and can be removed and sterilized by hand; (5) The vacuum chamber lifting device and the rubber stopper pressure rod lifting device are controlled by separate motors, and the height can be adjusted independently according to the actual situation; (6) The rubber stopper pressure rod lifting shaft and the vacuum chamber lifting shaft are installed in a through-type manner, which saves installation space. Attached Figure Description

[0022] Figure 1 This is a side view of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the main frame of the present invention.

[0024] In the diagram: 1. Plug pressure rod; 2. Vacuum chamber mounting arm; 3. Plug; 4. Vacuum chamber sleeve; 5. Vacuum silicone disc; 6. Pre-fill needle; 7. Pre-fill needle bracket; 8. Pre-fill needle support seat; 9. Housing; 10. Foot; 11. Plug pressure rod mounting arm; 12. Plug pressure rod lifting shaft; 13. Vacuum chamber lifting shaft; 14. Vacuum chamber lifting shaft support seat; 15. Vacuum lifting shaft seat; 16. Vacuum lifting base plate; 17. Vacuum lifting ball screw; 18. Stepper motor; 19. Middle base plate; 20. Main synchronous pulley; 21. Lower base plate; 22. Upper base plate; 23. Plug pressure rod lifting connecting plate; 24. Upper support column; 25. Plug pressure rod ball screw; 26. Plug pressure rod lifting shaft seat; 27. Motor mounting bracket; 28. Synchronous belt; 29. ​​Driven synchronous pulley; 30. Lower support. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and examples. Specific implementation examples:

[0027] like Figure 1 and Figure 2 As shown, a tabletop pre-filled needle vacuum stopper machine includes a stopper rod 1, a vacuum chamber mounting arm 2, a stopper 3, a vacuum chamber sleeve 4, a vacuum silicone disc 5, a pre-filled needle 6, a pre-filled needle bracket 7, a pre-filled needle support seat 8, a housing 9, a base 10, a stopper rod mounting arm 11, a stopper rod lifting shaft 12, a vacuum chamber lifting shaft 13, a vacuum chamber lifting shaft support seat 14, a vacuum chamber lifting shaft seat 15, a vacuum lifting base plate 16, a vacuum lifting ball screw 17, a stepper motor 18, a middle base plate 19, a main synchronous belt pulley 20, a lower base plate 21, an upper base plate 22, a stopper rod lifting connecting plate 23, an upper support column 24, a stopper rod ball screw 25, a stopper rod lifting shaft seat 26, a motor mounting bracket 27, a synchronous belt 28, a driven synchronous belt pulley 29, a lower support 30; and a main frame, which supports the main body of the stopper machine and controls the movement of related structures.

[0028] The lifting system is mounted on the outer casing 9. The lifting system controls the lifting of the rubber stopper lever lifting device and the vacuum chamber lifting device. The vacuum chamber lifting device contains a vacuum pump and a vacuum chamber, while the rubber stopper lever lifting device contains a rubber stopper. The lifting system also includes a drive assembly for providing power, which is divided into a first drive assembly for driving the rubber stopper lever lifting device and a second drive assembly for driving the vacuum chamber lifting device. A pre-charging needle assembly is used to hold the pre-charging needle and is located below the lifting system. The main frame also has a reset button for resetting the lifting system and an adjustment system for changing the vacuum value of the vacuum pump.The vacuum chamber lifting device includes a vacuum chamber mounting arm 2, a vacuum chamber lifting shaft 13, and a vacuum chamber lifting shaft support 14. The vacuum chamber lifting shaft support 14 is mounted on the main frame, and the vacuum chamber lifting shaft 13 is mounted on the vacuum chamber lifting shaft support 14. The vacuum chamber mounting arm 2 is connected to the end of the vacuum chamber lifting shaft 13 away from the vacuum chamber lifting shaft support 14. The vacuum pump is installed inside the vacuum chamber mounting arm 2. The rubber stopper lifting device includes a rubber stopper 1, a rubber stopper mounting arm 11, and a rubber stopper lifting shaft 12. The rubber stopper lifting shaft 12 is mounted on the main frame, and the rubber stopper mounting arm 11 is connected to the top of the rubber stopper lifting shaft 12. The rubber stopper 1 is mounted on the rubber stopper mounting arm 2. At the end of arm 11 away from the rubber stopper lifting shaft 12, the pre-charge needle assembly includes a pre-charge needle bracket 7 and a pre-charge needle support seat 8. The pre-charge needle support seat 8 is mounted on the main frame, and the pre-charge needle bracket 7 is mounted on the pre-charge needle support seat 8 and located below the vacuum chamber lifting device. A vacuum chamber sleeve 4 is also provided at the bottom of the vacuum chamber mounting arm 2, and a vacuum silicone disc 5 is provided at the bottom of the vacuum chamber sleeve 4. A vacuum chamber lifting shaft bearing 15 is also connected to the bottom of the vacuum chamber lifting shaft support seat 14. The vacuum chamber lifting shaft bearing 15 is located inside the main frame, and a vacuum lifting base plate 16 is provided below the vacuum chamber lifting shaft bearing 15. A vacuum lifting ball screw 17 is also connected to the bottom of the vacuum lifting base plate 16. (Second drive...) The components are located at the bottom of the vacuum lifting ball screw 17. The second drive component includes a pulley, a motor mounting bracket 27, and a stepper motor 18. The vacuum lifting ball screw 17 is connected to the stepper motor 18 via the pulley. The pulley includes a main synchronous pulley 20, a synchronous belt 28, and a driven synchronous pulley 29. The motor mounting bracket 27 is fixed inside the main frame, and the stepper motor 18 is mounted on the motor mounting bracket 27. The rubber stopper lever lifting device also includes a rubber stopper lever lifting connecting plate 23, a rubber stopper lever ball screw 25, and a rubber stopper lever lifting shaft seat 26. The rubber stopper lever ball screw 25 is connected to the bottom of the rubber stopper lever lifting connecting plate 23, and the rubber stopper lever lifting connecting plate 23 is located on the rubber stopper lever. Below the lifting shaft 12, the rubber stopper lifting shaft seat 26 is located below the rubber stopper lifting connecting plate 23. The first drive assembly is located below the rubber stopper ball screw 25. The main frame contains an upper base plate 22, a middle base plate 19, and a lower base plate 21. The upper base plate 22 is located on the top surface inside the main frame, and the lower base plate 21 is located on the bottom surface inside the main frame. The middle base plate 19 is located between the upper base plate 22 and the lower base plate 21. An upper support column 24 is located between the upper base plate 22 and the middle base plate 19, and a lower support column 30 is located between the middle base plate 19 and the lower base plate 21. The rubber stopper lifting shaft 12 and the vacuum chamber lifting shaft 13 are installed in an interlocking manner.

[0029] In the above technical solution, clicking the reset button will automatically return the stopper lifting device and the vacuum chamber lifting device to their original positions. The vacuum value is adjusted according to the existing temperature, humidity, and liquid characteristics. The pre-filling needle is manually placed on the pre-filling needle assembly, and then the stopper is placed on the stopper lifting device. The second drive assembly is controlled to cause the vacuum chamber lifting device to descend. When the bottom of the vacuum chamber lifting device is tightly fitted with the pre-filling needle bottle opening, the vacuum chamber lifting device stops descending. At this point, the vacuum chamber is sealed with a stopper above and the pre-filling needle below, forming a closed space. The vacuum pump starts working and stops working when the set vacuum value is reached. Then, the first drive assembly is controlled to move the stopper lifting device, driving the stopper through the vacuum chamber into the pre-filling needle bottle opening. The vacuum pump stops working. Since there is no stopper above the vacuum chamber to form a sealed space, the vacuum is broken, and the stopper automatically enters the pre-filling needle under atmospheric pressure, reaching above the liquid surface. The stopper lifting device rises back to its initial position, and then the vacuum chamber lifting device rises back to its initial position. The entire process is complete. Because it has a built-in miniature vacuum pump, it does not require an external gas source and has advantages such as low noise, fast response speed, high vacuum degree, and wide applicability. The vacuum degree is adjustable and highly adaptable, and vacuum plugging avoids the air bubble problem associated with mechanical plugging. The vacuum chamber mounting arm 2 is used to mount the vacuum chamber and vacuum pump. The vacuum chamber lifting shaft support 14 supports the vacuum chamber lifting device, and the vacuum chamber lifting shaft 13 drives the lifting movement of the vacuum chamber mounting arm 2, making the overall structure more stable. The rubber stopper rod lifting shaft 12 is connected to the rubber stopper rod 1 via the rubber stopper rod mounting arm 11. The rubber stopper rod 1 moves up and down under the drive of the rubber stopper rod lifting shaft 12, making the movement more stable. The pre-charge needle bracket 7 cooperates with the pre-charge needle 6 and can be equipped with structures including but not limited to groove structures and snap-fit ​​structures for fixing the pre-charge needle 6. The pre-charge needle support 8 is used to fix and support the pre-charge needle bracket 7, making the pre-charge needle assembly more stable. The rubber stopper 3 is placed inside the vacuum chamber sleeve 4. The vacuum silicone disc 5 fits tightly against the pre-filling needle 6 bottle opening to ensure a tight seal. The diameter of the rubber stopper pressure rod 1 is smaller than the inner diameter of both the vacuum chamber sleeve 4 and the pre-filling needle 6. The rubber stopper pressure rod 1 presses the rubber stopper 3 through the vacuum chamber sleeve 4 into the pre-filling needle 6 bottle opening, ensuring good sealing and a good stoppering effect. The second drive assembly, in conjunction with the vacuum lifting ball screw 17, drives the vacuum chamber lifting shaft 13. The vacuum chamber lifting shaft seat 15 stabilizes the vacuum chamber lifting shaft support 14, and the vacuum lifting base plate 16 connects the vacuum chamber lifting shaft seat 15 and the vacuum lifting ball screw 17, resulting in a more stable structure. The stepper motor 18 drives the main synchronous pulley 20, which in turn drives the secondary synchronous pulley 29 via the synchronous belt 28, thereby driving the vacuum lifting ball screw 17 and realizing the movement of the vacuum chamber lifting shaft 13.The first drive assembly, in conjunction with the rubber stopper pressure rod ball screw 25, drives the rubber stopper lifting device to achieve lifting and lowering movement. The upper, middle, and lower base plates, together with the upper and lower support columns, construct the internal support frame of the main frame, enhancing the overall structural stability. At the same time, the middle base plate 19 can also cooperate with the vacuum lifting base plate 16 to limit the lifting range of the vacuum chamber device, making it safer and more stable during use. The base feet 10 facilitate the overall movement and placement of the device. The rubber stopper pressure rod lifting shaft 12 and the vacuum chamber lifting shaft 13 adopt an interlocking installation method, that is, the rubber stopper pressure rod lifting shaft 12 passes through the vacuum chamber lifting shaft 13, and the two are concentric, saving installation space.

Claims

1. A tabletop pre-filled needle vacuum plugging machine, characterized in that it comprises: The main frame supports the main body of the stopper press. The main frame is equipped with a reset button for resetting the lifting system and an adjustment system for changing the vacuum value of the vacuum pump. The lifting system includes a rubber stopper lifting device and a vacuum chamber lifting device. The lifting system is installed on the main frame and is used to control the lifting of the rubber stopper lifting device and the vacuum chamber lifting device. The vacuum chamber lifting device is equipped with a vacuum pump and a vacuum chamber. The vacuum chamber lifting device includes a vacuum chamber mounting arm (2), a vacuum chamber sleeve (4) at the bottom of the vacuum chamber mounting arm (2), a vacuum silicone disc (5) at the bottom of the vacuum chamber sleeve (4), a rubber stopper (3) inside the vacuum chamber sleeve (4), and a vacuum pump installed inside the vacuum chamber mounting arm (2). The lifting system also includes a drive assembly for providing power. The drive assembly includes a first drive assembly for driving the rubber stopper lifting device and a second drive assembly for driving the vacuum chamber lifting device. A pre-charge needle assembly for holding a pre-charge needle (6) is provided below the lifting system. When the vacuum chamber lifting device is in contact with the pre-fill needle bottle opening, the vacuum chamber is blocked by a rubber stopper above and the pre-fill needle is below, forming a sealed space. After the vacuum pump works and reaches the set vacuum value, the rubber stopper lifting device drives the rubber stopper through the vacuum chamber into the bottle opening of the pre-fill needle.

2. The tabletop pre-filled needle vacuum plugging machine according to claim 1, characterized in that, The vacuum chamber lifting device also includes a vacuum chamber lifting shaft (13) and a vacuum chamber lifting shaft support (14). The vacuum chamber lifting shaft support (14) is mounted on the main frame, and the vacuum chamber lifting shaft (13) is mounted on the vacuum chamber lifting shaft support (14). The vacuum chamber mounting arm (2) is connected to one end of the vacuum chamber lifting shaft (13) away from the vacuum chamber lifting shaft support (14).

3. A tabletop pre-filled needle vacuum plugging machine according to claim 2, characterized in that, The rubber stopper lifting device includes a rubber stopper (1), a rubber stopper mounting arm (11), and a rubber stopper lifting shaft (12). The rubber stopper lifting shaft (12) is mounted on the main frame. The rubber stopper mounting arm (11) is connected to the top of the rubber stopper lifting shaft (12). The rubber stopper (1) is mounted on the end of the rubber stopper mounting arm (11) away from the rubber stopper lifting shaft (12).

4. A tabletop pre-filled needle vacuum plugging machine according to claim 3, characterized in that, The pre-charge needle assembly includes a pre-charge needle bracket (7) and a pre-charge needle support (8). The pre-charge needle support (8) is mounted on the main frame, and the pre-charge needle bracket (7) is mounted on the pre-charge needle support (8) and located below the vacuum chamber lifting device.

5. A tabletop pre-filled needle vacuum plugging machine according to any one of claims 2, 3, or 4, characterized in that, The vacuum chamber lifting shaft support (14) is connected to a vacuum chamber lifting shaft seat (15) at its bottom. The vacuum chamber lifting shaft seat (15) is located inside the main frame. A vacuum lifting base plate (16) is located below the vacuum chamber lifting shaft seat (15). A vacuum lifting ball screw (17) is connected to the bottom of the vacuum lifting base plate (16). The second drive assembly is located at the bottom of the vacuum lifting ball screw (17).

6. A tabletop pre-filled needle vacuum plugging machine according to claim 5, characterized in that, The second drive assembly includes a pulley, a motor mounting bracket (27), and a stepper motor (18). The vacuum lifting ball screw (17) is connected to the stepper motor (18) via the pulley. The pulley includes a main synchronous pulley (20), a synchronous belt (28), and a secondary synchronous pulley (29). The motor mounting bracket (27) is fixed inside the main frame, and the stepper motor (18) is mounted on the motor mounting bracket (27).

7. A tabletop pre-filled needle vacuum plugging machine according to claim 6, characterized in that, The stopper lever lifting device further includes a stopper lever lifting connecting plate (23), a stopper lever ball screw (25), and a stopper lever lifting shaft seat (26). The stopper lever ball screw (25) is connected to the bottom of the stopper lever lifting connecting plate (23). The stopper lever lifting connecting plate (23) is located below the stopper lever lifting shaft (12). The stopper lever lifting shaft seat (26) is located below the stopper lever lifting connecting plate (23). The first drive assembly is located below the stopper lever ball screw (25). The structure of the first drive assembly is the same as that of the second drive assembly.

8. A tabletop pre-filled needle vacuum plugging machine according to any one of claims 1, 2, 3, or 4, characterized in that, The main frame is provided with an upper base plate (22), a middle base plate (19) and a lower base plate (21). The upper base plate (22) is set on the top surface inside the main frame, the lower base plate (21) is set on the bottom surface inside the main frame, the middle base plate (19) is set between the upper base plate (22) and the lower base plate (21), an upper support column (24) is provided between the upper base plate (22) and the middle base plate (19), and a lower support column (30) is provided between the middle base plate (19) and the lower base plate (21).

9. A tabletop pre-filled needle vacuum plugging machine according to any one of claims 1, 2, 3, or 4, characterized in that, The main frame also includes a base (10) at the bottom of the main frame and a shell (9) on the outer surface of the main frame.

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