Dose-adjustable medical oncology immune injection device

Abstract

The invention relates to the technical field of medical instruments, in particular to a dosage-adjustable medical oncology immune injection device which comprises a controller and an injection cylinder, a fixing plate is arranged at the top of the injection cylinder, a needle head is arranged at the bottom of the injection cylinder, and a partition plate is arranged on the inner side wall of the injection cylinder and divides the interior of the injection cylinder into a liquid storage cavity and an injection cavity. The side wall of the liquid storage cavity is communicated with a liquid inlet one-way valve; an inlet hole is formed in the partition plate; a processing cylinder is arranged on the inner bottom wall of the injection cavity, a flow adjusting assembly is arranged on the processing cylinder, an injection assembly, a driving assembly and a transmission assembly are arranged in the processing cylinder, and a liquid level monitoring assembly is arranged in the injection cavity. The liquid level height of the injection in the injection cavity is monitored in real time through the liquid level monitoring assembly, and the flow of the injection is adjusted in real time through the adjusting assembly, so that the amount of the injection can be dynamically stable in the injection cavity, and meanwhile, the pressure intensity of the injection is also dynamically stable; the situation of flow velocity mutation caused by injection pressure intensity change is reduced, and a patient is protected.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a dose-adjustable immunotherapy device for oncology. Background Technology

[0002] Immunotherapy devices for oncology are medical instruments used in the process of immunotherapy for oncology to precisely control and flexibly adjust the dosage of injected drugs. These devices achieve dosage adjustment through their mechanical structure design or electronic systems, thereby improving treatment accuracy and safety. For example, the B. Braun InfusomatSpace infusion pump features high-precision flow control technology, achieving infusion accuracy of ±5% under standard conditions. Furthermore, it utilizes high-precision sensors and an intelligent system to stabilize the flow rate, ensuring a safe and reliable infusion process.

[0003] However, although the above-mentioned devices can achieve high-precision control of flow rate, they may still cause discomfort to patients due to excessively fast liquid flow rate during operation, or even cause secondary harm to patients.

[0004] In summary, the problem that existing oncology immunotherapy devices may cause discomfort to patients or even secondary harm due to excessively fast flow rates during operation has become a pressing issue in this field. Therefore, it is necessary to propose an oncology immunotherapy device with adjustable dosage. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a dose-adjustable immunotherapy injection device for oncology. A liquid level monitoring component monitors the liquid level in the injection chamber in real time, and an adjustment component regulates the flow rate of the injection fluid entering the chamber. This ensures that the total volume of the injection fluid in the chamber remains dynamically stable, and the pressure of the injection fluid at the same level also remains dynamically stable. This reduces sudden changes in flow rate caused by pressure variations during fluid transfer, thus protecting the patient.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A dose-adjustable oncology immunotherapy injection device includes a controller and an injection cylinder. A fixing plate is fixedly connected to the top of the injection cylinder, and a liquid outlet check valve is connected to the injection cylinder. A needle is detachably connected to the bottom of the injection cylinder through the liquid outlet check valve. A partition is fixedly connected to the inner wall of the injection cylinder, and the partition divides the inside of the injection cylinder into a liquid storage chamber and an injection chamber from top to bottom. The liquid storage chamber is filled with injection liquid, and an inlet check valve is connected to the side wall of the liquid storage chamber. An inlet hole is opened on the partition for the injection liquid to enter the injection chamber.

[0007] A processing cylinder is fixedly connected to the bottom wall of the injection chamber. The processing cylinder is equipped with a flow regulating component for adjusting the flow rate of the injection solution when it enters the injection chamber. Inside the processing cylinder is an injection component for injecting the injection solution through a needle. The injection component is located below the flow regulating component.

[0008] The processing cylinder is also equipped with a drive component for driving the flow regulation component and a transmission component for transmitting the driving force of the drive component to the injection component to make it operate. The injection chamber is also equipped with a level monitoring component for monitoring the liquid level height of the injection fluid in the injection chamber.

[0009] The technical principles of the above solution are as follows:

[0010] Medical staff control the drive component via a controller, which in turn drives the transmission component, which in turn drives the injection component. At this time, the injection fluid in the reservoir enters the injection chamber through the inlet port. During operation, the injection component injects the fluid from the injection chamber into the patient through the needle and the one-way valve.

[0011] During this process, the liquid level monitoring component monitors the liquid level height in the injection chamber in real time and sends the liquid level information in the injection chamber to the controller in real time. The controller controls the operation mode of the drive component based on the liquid level information, so that it drives the flow regulation component to operate according to the specific situation of the liquid level information, and adjusts the operation mode of the flow regulation component to ensure that the total amount of injection fluid in the injection chamber is kept within a dynamic and stable value.

[0012] The above approach has the following beneficial effects:

[0013] 1. This invention monitors the liquid level of the injection fluid in the injection chamber in real time using a liquid level monitoring component, and adjusts the flow rate of the injection fluid entering the injection chamber in real time using an adjustment component. This ensures that the total amount of injection fluid in the injection chamber remains at a dynamically stable value, and the pressure of the injection fluid at the same horizontal level also remains at a dynamically stable value. This reduces the sudden changes in flow rate caused by changes in injection pressure when the injection component transfers the injection fluid, thereby protecting the patient.

[0014] 2. The design of the processing cylinder in this invention prevents the drive and transmission components from directly contacting the injection solution. This protects the drive and transmission components, reduces their corrosion by the injection solution, and ensures the purity of the injection solution, preventing contamination from impurities generated by the drive and transmission components during operation.

[0015] 3. In this invention, after medical staff set the liquid level threshold, the liquid level monitoring component will monitor the liquid level height in the injection cavity in real time. When the liquid level height is continuously lower than the liquid level threshold within 10 seconds, the liquid level monitoring component can send an alarm message to the medical staff through the controller, so that the medical staff can respond in a timely manner according to the emergency.

[0016] Furthermore, the flow regulating component includes an regulating plate rotatably fitted to the bottom of the partition plate. The bottom of the regulating plate is rotatably fitted to the top of the processing cylinder. The regulating plate has several regulating holes of different diameters. The initial position of one of the regulating holes is located directly below the inlet hole. The bottom of the regulating plate also has a locking hole.

[0017] Beneficial effects: By rotating the adjustment plate, medical staff can move the adjustment holes of different diameters below the inlet hole to achieve discrete flow rate adjustment of the injection solution.

[0018] Furthermore, the transmission assembly includes a fixed cylinder fixedly connected to the inner wall of the processing cylinder and a sliding block slidably fitted to the inner wall of the processing cylinder. Several springs are fixedly connected to the bottom of the fixed cylinder, and the ends of the springs away from the fixed cylinder are fixedly connected to the sliding block.

[0019] The inner wall of the fixed cylinder is rotatably fitted with a rotating block. Several first protrusions are fixedly connected to the bottom of the rotating block, and several second protrusions are fixedly connected to the top of the sliding block. The second protrusions are all located in the movement path of the first protrusions.

[0020] Beneficial effects: The first protrusion at the bottom of the rotating block, driven by the rotation of the rotating block, can intermittently contact the second protrusion at the top of the sliding block. When the rotating block rotates, the first protrusion periodically pushes the second protrusion, causing the sliding block to reciprocate under the action of the spring. During this process, the spring can buffer the force on the sliding block, thereby extending the service life of the sliding block.

[0021] Furthermore, the drive assembly includes a drive component located inside the processing cylinder. The output shaft at one end of the drive component is fixedly connected to the top of the rotating block, and a telescopic component is fixedly connected to the output shaft at the other end of the drive component. The controller is used to control the rotation of the output shaft of the drive component and the extension and retraction of the output shaft of the telescopic component. A locking block is fixedly connected to the output shaft of the telescopic component, and the locking block can be detachably engaged with the locking hole. Fixed rods are symmetrically fixedly connected to the drive component, and the ends of the fixed rods away from the drive component are fixedly connected to the inner side wall of the processing cylinder.

[0022] Beneficial effects: When the output shaft of the telescopic component extends and drives the locking block to engage with the locking hole, the output shaft of the drive component can drive the adjustment plate to rotate through the telescopic component and the locking block during rotation. This causes the adjustment holes of different diameters to be located below the inlet hole, so that the amount of injection liquid entering the injection chamber per unit time changes, thereby realizing the adjustment of the amount of injection liquid released inside the syringe per unit time.

[0023] Furthermore, the injection assembly includes an injection rod fixedly connected to the bottom of the sliding block, an injection plate fixedly connected to the bottom of the injection rod, the injection plate slidingly engaging with the inner wall of the treatment cylinder, and a one-way injection valve symmetrically connected to the lower part of the side wall of the treatment cylinder.

[0024] Beneficial effects: The syringe plunger reciprocates under the action of the sliding block, which in turn causes the injection plate to reciprocate as well. The injection plate then draws the injection solution to its lower part via the injection check valve, and the solution is then administered to the patient through the needle and the dispensing check valve. The injection check valve effectively prevents backflow of the injection solution, ensuring the purity of the injected solution.

[0025] Furthermore, the liquid level monitoring component includes a liquid level sensor fixedly connected to the lower part of the inner sidewall of the injection chamber, and a controller for receiving liquid level information collected by the liquid level sensor and controlling the rotation of the output shaft of the drive component and the extension and retraction of the output shaft of the telescopic component based on the liquid level information.

[0026] Beneficial effects: The design of fixing the liquid level sensor to the lower part of the inner wall of the injection chamber allows the remaining liquid level in the injection chamber to be monitored in real time. When the liquid level in the injection chamber is continuously lower than the threshold set by medical staff within 10 seconds, the controller will send an alarm to medical staff based on the liquid level information sent by the liquid level sensor.

[0027] Furthermore, the cross-sectional shape of both the first and second protrusions is semi-elliptical.

[0028] Beneficial effects: The radius of curvature of the semi-elliptical cross section is larger at the top and smaller at the bottom, which can achieve a gradient distribution of contact stress, reduce the generation of fatigue cracks on the contact surface, and thus extend the service life of the first and second protrusions.

[0029] Furthermore, a display screen is fixedly connected to the fixed plate, and the controller is used to display the liquid level information in the injection chamber in real time through the display screen.

[0030] Beneficial effects: The design of the display screen allows medical staff to obtain liquid level information intuitively without relying on experience to estimate or separately check sensor data, thereby reducing the misjudgment rate of the remaining amount of injection fluid.

[0031] Furthermore, a rubber layer is fixedly connected to the injection plate.

[0032] Beneficial effects: The rubber layer can fill the tiny gap between the treatment cylinder and the injection plate through compression deformation, thereby forming a physical barrier to prevent the injection liquid from contacting other components inside the treatment cylinder, thus protecting the components inside the treatment cylinder.

[0033] Furthermore, a needle cap is detachably connected to the needle tip.

[0034] Beneficial effects: The needle cap design creates a sealed space around the needle tip, completely covering the exposed part of the needle tip, effectively reducing the possibility of airborne microorganisms, dust, or foreign objects coming into contact with the needle tip and causing contamination.

[0035] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] Figure 1 This is an isometric schematic diagram of the dose-adjustable immunotherapy injection device for oncology according to the present invention.

[0037] Figure 2 This is an isometric schematic diagram of the internal structure of the treatment cylinder in the dose-adjustable oncology immunotherapy injection device of the present invention.

[0038] Figure 3 This is a frontal cross-sectional schematic diagram of the dose-adjustable oncology immunotherapy device of the present invention.

[0039] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle.

[0040] The reference numerals in the accompanying drawings of the instruction manual include: 1. syringe; 2. fixing plate; 3. needle; 4. partition; 5. inlet check valve; 6. treatment cylinder; 7. adjusting plate; 8. fixing cylinder; 9. sliding block; 10. rotating block; 11. first protrusion; 12. second protrusion; 13. locking block; 14. fixing rod; 15. injection rod; 16. injection plate; 17. injection check valve; 18. liquid level sensor; 19. display screen. Detailed Implementation

[0041] The following detailed description illustrates the specific implementation method:

[0042] Example 1:

[0043] As attached Figure 1 and Figure 3 As shown: A dose-adjustable oncology immunotherapy injection device includes a controller and an injection cylinder 1. A fixing plate 2 is welded to the top of the injection cylinder 1. A liquid outlet check valve is connected to the injection cylinder 1. A needle 3 is detachably connected to the bottom of the injection cylinder 1 through the liquid outlet check valve. A partition 4 is welded to the inner wall of the injection cylinder 1. The partition 4 divides the inside of the injection cylinder 1 into a liquid storage chamber and an injection chamber from top to bottom. The liquid storage chamber is filled with injection liquid. An inlet check valve 5 is connected to the side wall of the liquid storage chamber. An inlet hole is opened on the partition 4 for the injection liquid to enter the injection chamber.

[0044] The bottom wall of the injection chamber is integrally formed with a processing cylinder 6. The processing cylinder 6 is provided with a flow regulating component for adjusting the flow rate of the injection liquid when it enters the injection chamber. Inside the processing cylinder 6 is an injection component for injecting the injection liquid through the needle 3. The injection component is located below the flow regulating component.

[0045] The processing cylinder 6 is also equipped with a drive component for driving the flow regulation component and a transmission component for transmitting the driving force of the drive component to the injection component to make it operate. The injection chamber is also equipped with a liquid level monitoring component for monitoring the liquid level height of the injection fluid in the injection chamber.

[0046] like Figure 2 and Figure 3 As shown, the drive assembly includes a drive component located inside the processing cylinder 6. A telescopic component is screwed and fixedly connected to the output shaft at one end of the drive component. The controller is used to control the rotation of the output shaft of the drive component and the extension and retraction of the output shaft of the telescopic component. A locking block 13 is screwed and fixedly connected to the output shaft of the telescopic component, such as... Figure 4 As shown, the drive component is symmetrically screwed with fixing rods 14, and the ends of the fixing rods 14 away from the drive component are welded to the inner wall of the processing cylinder 6. In this embodiment, a dual-head motor is used as the drive component, and an electric telescopic rod is used as the telescopic component.

[0047] Specifically, since the electric telescopic rod is fixedly connected to the output shaft of the dual-head motor by screws, when the output shaft of the dual-head motor rotates, it can drive the electric telescopic rod to rotate, thereby driving the locking block 13 on the output shaft of the electric telescopic rod to rotate.

[0048] like Figure 2 As shown, the flow regulating assembly includes an regulating plate 7 rotatably fitted to the bottom of the partition plate 4. The bottom of the regulating plate 7 is rotatably fitted to the top of the processing cylinder 6. The regulating plate 7 has several regulating holes of different diameters. The initial position of one of the regulating holes is located directly below the inlet hole. The bottom of the regulating plate 7 also has a locking hole, and the locking block 13 can be detachably engaged with the locking hole.

[0049] Specifically, since one of the adjustment holes is initially positioned directly below the inlet hole, and the adjustment chamber above the partition 4 is filled with injection fluid, the injection fluid can enter the injection chamber through the inlet hole and the adjustment hole. Furthermore, since the adjustment plate 7, which has several adjustment holes, is rotatably engaged with the bottom of the partition 4, and the diameters of these holes are all different, and the locking block 13 is detachably engaged with the locking hole, when the locking block 13 is engaged with the locking hole, the output shaft of the dual-head motor, during rotation, can drive the adjustment plate 7 to rotate via the electric telescopic rod and the locking block 13, causing the adjustment holes of different diameters to be positioned directly below the inlet hole. This changes the diameter of the adjustment hole connected to the inlet hole, thereby altering the total amount of injection fluid entering the injection chamber per unit time, thus achieving the purpose of flow regulation. By controlling the flow rate within a dynamic and stable value, the liquid level in the injection chamber can also be kept at a dynamic and stable value. This allows the pressure of the injection fluid in the injection chamber to be maintained at a dynamic and stable value, reducing the possibility of secondary harm to the patient caused by sudden changes in flow rate due to pressure changes when the injection fluid is injected into the patient's body.

[0050] like Figure 2 As shown, the transmission assembly includes a fixed cylinder 8 integrally formed on the inner wall of the processing cylinder 6 and a sliding block 9 slidably fitted on the inner wall of the processing cylinder 6. Several springs are welded to the bottom of the fixed cylinder 8, and the ends of the springs away from the fixed cylinder 8 are all welded to the sliding block 9.

[0051] The inner wall of the fixed cylinder 8 is rotatably fitted with a rotating block 10. The output shaft of the dual-head motor at the end away from the electric telescopic rod is fixedly connected to the top screw of the rotating block 10. The bottom of the rotating block 10 is integrally formed with several first protrusions 11, and the top of the sliding block 9 is integrally formed with several second protrusions 12. The second protrusions 12 are all located in the movement path of the first protrusions 11. The cross-sectional shape of the first protrusions 11 and the second protrusions 12 are both semi-elliptical.

[0052] Specifically, since the rotating block 10 is rotatably engaged with the inner wall of the fixed cylinder 8, the bottom of the rotating block 10 is integrally formed with the first protrusion 11, and the output shaft of the dual-head motor is fixedly connected to the top of the rotating block 10 with screws, when the dual-head motor rotates, it can drive the rotating block 10 to rotate, which in turn drives the first protrusion 11 to rotate. Furthermore, since the second protrusions 12 are all located in the movement path of the first protrusions 11, and the second protrusions 12 are all integrally formed with the sliding block 9, when the first protrusion 11 contacts the second protrusion 12 during rotation, it can push the sliding block 9 by pushing the second protrusion 12. At this time, since the two ends of the spring are welded to the sliding block 9 and the fixed cylinder 8 respectively, when the sliding block 9 is pushed, the spring will undergo tensile deformation. When the first protrusion 11 is no longer in contact with the second protrusion 12, the stretched spring generates a restoring force, which can pull the sliding block 9 towards its initial position.

[0053] like Figure 2 and Figure 3 As shown, the injection assembly includes an injection rod 15 integrally formed on the bottom of the sliding block 9, an injection plate 16 integrally formed on the bottom of the injection rod 15, a rubber layer fixedly bonded to the injection plate 16, the injection plate 16 slidingly engaging vertically with the inner side wall of the treatment cylinder 6, and an injection check valve 17 symmetrically connected to the lower part of the side wall of the treatment cylinder 6.

[0054] Specifically, since the injection rod 15, the sliding block 9, and the injection plate 16 are all integrally formed, when the sliding block 9 is actuated, the sliding block 9 can drive the injection rod 15 and the injection plate 16 to move... Figure 3 The shown processing cylinder 6 moves downwards, and when the sliding block 9 is pulled by the spring, it moves downwards. Figure 3 When the treatment cylinder 6 moves upward, the sliding block 9 also drives the injection rod 15 and injection plate 16 to move upward within the treatment cylinder 6. When the injection plate 16 moves upward, thanks to the design of the injection check valve 17 connected to the side wall of the treatment cylinder 6, it can draw the injection fluid in the injection chamber into the treatment cylinder 6. When the injection plate 16 moves downward, it can discharge the injection fluid from the treatment cylinder 6 through the discharge check valve and the needle 3.

[0055] like Figure 3 As shown, the liquid level monitoring component includes a liquid level sensor 18 fixedly connected to the lower part of the inner side wall of the injection chamber by screws. The controller is used to receive the liquid level information collected by the liquid level sensor 18 and control the rotation of the output shaft of the dual-head motor and the extension and retraction of the output shaft of the electric telescopic rod based on the liquid level information.

[0056] Specifically, after medical staff set the liquid level threshold through the controller, the controller controls the rotation of the output shaft of the dual-head motor and the extension and retraction of the output shaft of the electric telescopic rod based on the liquid level information. Therefore, when the liquid level information received by the controller is lower than the liquid level threshold, the controller can control the electric telescopic rod to extend, so that its output shaft drives the locking block 13 to engage with the locking hole, and then drives the output shaft of the dual-head motor to rotate. Through the electric telescopic rod and the locking block 13, the adjusting plate 7 is rotated, which changes the adjusting hole located below the inlet hole. By adjusting the position of the adjusting holes with different diameters, the amount of injection fluid entering the injection chamber per unit time can be controlled, so that the liquid level of the injection fluid in the injection chamber can be maintained at a dynamic and stable value.

[0057] The specific implementation process is as follows:

[0058] Medical staff fill the reservoir with injection solution through the inlet check valve 5, and then control the dual-head motor to rotate through the controller, so that the injection solution enters the injection chamber through the inlet and adjustment holes.

[0059] The output shaft of the dual-head motor drives the rotating block 10 to rotate, which in turn drives the first protruding block 11 to rotate, causing it to push the second protruding block 12, the sliding block 9, the injection rod 15, and the injection plate 16 downwards, thus expelling excess gas. Figure 3 As shown, the spring undergoes tensile deformation at this time. When the rotating block 10 continues to rotate, causing the first protrusion 11 to rotate until it no longer contacts the second protrusion 12, the spring generates a restoring force. Under the restoring force of the spring, the sliding block 9 moves upward, driving the sliding block 9, the injection rod 15, and the injection plate 16 to move upward, drawing the injection solution to below the injection plate 16 through the one-way injection valve 17. In this embodiment, after the injection plate 16 has drawn up the injection solution, the output shaft of the dual-head motor stops rotating for 3 seconds before continuing to rotate, to ensure that the injection solution is buffered after being drawn up, thereby reducing the patient's discomfort when the injection solution is discharged.

[0060] When the output shaft of the dual-head motor rotates, the first protrusion 11 and the second protrusion 12 will periodically contact each other, thereby enabling the injection plate 16 to reciprocate. After the injection liquid is drawn up, it can be discharged through the liquid outlet check valve and the needle 3.

[0061] During this process, medical staff set the liquid level threshold of the injection chamber through the controller and monitor it in real time through the liquid level sensor 18, sending the liquid level information to the controller. When the liquid level information received by the controller indicates that the liquid level of the injection chamber is lower than the liquid level threshold, the controller controls the output shaft of the electric telescopic rod to extend, causing it to drive the locking block 13 to engage with the locking hole. Then, the controller controls the output shaft of the dual-head motor to rotate, causing it to drive the electric telescopic rod and the adjusting plate 7 to rotate, thereby displacing the adjusting holes of different diameters below the inlet hole, thus adjusting the amount of injection fluid entering the injection chamber per unit time.

[0062] When the controller receives a liquid level information indicating that the level of the injection solution is below the liquid level threshold, and this liquid level information persists for 10 seconds, the controller sends an alarm to the medical staff.

[0063] This invention uses a liquid level monitoring component to monitor the liquid level in the injection chamber in real time, and uses an adjustment component to adjust the flow rate of the injection fluid in real time. This ensures that the amount of injection fluid in the injection chamber remains dynamically stable, and the pressure of the injection fluid also remains dynamically stable. This reduces sudden changes in flow rate caused by changes in injection pressure, thus protecting the patient.

[0064] Example 2:

[0065] As attached Figure 1 As shown, the difference from Embodiment 1 is that a display screen 19 is embedded in the fixing plate 2, and the controller is used to display the liquid level information in the injection chamber in real time through the display screen 19.

[0066] The specific implementation process is as follows: When medical staff need to obtain liquid level information, the display screen 19 can provide an intuitive information display, so that medical staff do not need to rely on experience to estimate or check sensor data separately. They can intuitively obtain liquid level information through the display screen 19, thereby reducing the misjudgment rate of the remaining amount of injection fluid.

[0067] Example 3:

[0068] The difference from Example 2 is that a needle cap (not shown in the figure) is detachably engaged at needle tip 3.

[0069] The specific implementation process is as follows: The design of the needle cap effectively reduces the contamination of the needle tip 3, thereby reducing the possibility of the patient being infected by external pathogens.

[0070] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dose-adjustable immunotherapy injection device for oncology, comprising an injection cylinder (1), a fixing plate (2) fixedly connected to the top of the injection cylinder (1), a liquid discharge check valve connected to the injection cylinder (1), and a needle (3) detachably connected to the bottom of the injection cylinder (1) through the liquid discharge check valve, characterized in that, It also includes a controller. A partition (4) is fixedly connected to the inner wall of the syringe (1). The partition (4) divides the inside of the syringe (1) into a liquid storage chamber and an injection chamber from top to bottom. The liquid storage chamber is filled with injection liquid. The side wall of the liquid storage chamber is connected to an inlet check valve (5). An inlet hole for the injection liquid to enter the injection chamber is opened on the partition (4). A processing cylinder (6) is fixedly connected to the bottom wall of the injection chamber. The processing cylinder (6) is provided with a flow regulating component for adjusting the flow rate of the injection liquid when it enters the injection chamber. The processing cylinder (6) is provided with an injection component for injecting the injection liquid through the needle (3). The injection component is located below the flow regulating component. The processing cylinder (6) is also equipped with a drive component for driving the flow regulation component and a transmission component for transmitting the driving force of the drive component to the injection component to make it operate. The injection chamber is also equipped with a liquid level monitoring component for monitoring the liquid level height of the injection liquid in the injection chamber.

2. The dose-adjustable oncology immunotherapy device according to claim 1, characterized in that, The flow regulating assembly includes an regulating plate (7) that is rotatably fitted to the bottom of the partition (4). The bottom of the regulating plate (7) is rotatably fitted to the top of the processing cylinder (6). The regulating plate (7) has several regulating holes of different diameters. The initial position of one of the regulating holes is located directly below the inlet hole. The bottom of the regulating plate (7) also has a locking hole.

3. The dose-adjustable oncology immunotherapy injection device according to claim 2, characterized in that, The transmission assembly includes a fixed cylinder (8) fixedly connected to the inner wall of the processing cylinder (6) and a sliding block (9) slidably fitted to the inner wall of the processing cylinder (6). Several springs are fixedly connected to the bottom of the fixed cylinder (8), and the ends of the springs away from the fixed cylinder (8) are fixedly connected to the sliding block (9). The inner wall of the fixed cylinder (8) is rotatably fitted with a rotating block (10). The bottom of the rotating block (10) is fixedly connected with several first protrusions (11), and the top of the sliding block (9) is fixedly connected with several second protrusions (12). The second protrusions (12) are all located in the movement path of the first protrusions (11).

4. The dose-adjustable oncology immunotherapy device according to claim 3, characterized in that, The drive assembly includes a drive unit located inside the processing cylinder (6). The output shaft at one end of the drive unit is fixedly connected to the top of the rotating block (10). A telescopic component is fixedly connected to the output shaft at the other end of the drive unit. The controller is used to control the rotation of the output shaft of the drive unit and the extension and retraction of the output shaft of the telescopic component. A locking block (13) is fixedly connected to the output shaft of the telescopic component. The locking block (13) is detachably engaged with the locking hole. Fixed rods (14) are symmetrically fixedly connected to the drive unit. The ends of the fixed rods (14) away from the drive unit are fixedly connected to the inner wall of the processing cylinder (6).

5. The dose-adjustable oncology immunotherapy device according to claim 4, characterized in that, The injection assembly includes an injection rod (15) fixedly connected to the bottom of the sliding block (9), an injection plate (16) fixedly connected to the bottom of the injection rod (15), the injection plate (16) sliding vertically with the inner wall of the treatment cylinder (6), and an injection check valve (17) symmetrically connected to the lower part of the side wall of the treatment cylinder (6).

6. The dose-adjustable oncology immunotherapy device according to claim 5, characterized in that, The liquid level monitoring component includes a liquid level sensor (18) fixedly connected to the lower part of the inner side wall of the injection chamber. The controller is used to receive the liquid level information collected by the liquid level sensor (18) and control the rotation of the output shaft of the drive component and the extension and retraction of the output shaft of the telescopic component based on the liquid level information.

7. The dose-adjustable oncology immunotherapy injection device according to claim 6, characterized in that, The cross-sectional shape of the first protrusion (11) and the second protrusion (12) is semi-elliptical.

8. The dose-adjustable oncology immunotherapy injection device according to claim 7, characterized in that, A display screen (19) is fixedly connected to the fixed plate (2), and the controller is used to display the liquid level information in the injection chamber in real time through the display screen (19).

9. The dose-adjustable oncology immunotherapy device according to claim 8, characterized in that, A rubber layer is fixedly connected to the injection plate (16).

10. The dose-adjustable oncology immunotherapy device according to claim 9, characterized in that, A needle cap is detachably connected to the needle tip (3).

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