Portable precise chemotherapeutic drug infusion device

Abstract

The invention discloses a portable precise chemotherapeutic drug infusion device, relates to the field of pressure infusion pumps, and solves the problem that the infusion amount of a drug is unstable in the carrying and infusion process due to the fact that the drug is easy to shake in the device when the existing portable chemotherapeutic drug infusion device is used. Comprising a machine body, an infusion mechanism, an exhaust mechanism and a medicine storage tank, the exhaust mechanism comprises a sliding plate, a light plate and a control tube, medicine in the medicine storage tank is accurately conveyed into an infusion tube through the infusion mechanism, and when the medicine is injected into the medicine storage tank, the medicine storage tank is communicated with the outside through the control tube; the air pressure in the medicine storage tank is kept balanced in the medicine filling process, the sliding plate is controlled to move downwards after medicine filling is completed, redundant air on the upper side is exhausted to the outside through the control pipe, the light plate is floated to block the bottom end of the control pipe, medicine can be pushed by the sliding plate in the follow-up infusion process, and continuous and stable conveying is achieved. The influence caused by medicine shaking is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure infusion pumps, and in particular to a portable precise infusion device for chemotherapy drugs. Background Art

[0002] Chemotherapy is the abbreviation of chemical drug treatment, which achieves the purpose of treatment by using chemotherapeutic drugs to kill cancer cells. Chemotherapy drugs generally include fluorouracil, cisplatin, carboplatin, vincristine, etc., which are mainly used to achieve long-term administration in the body and maintain the effective blood concentration of the drug. During the chemotherapy process, it is often necessary to use a chemotherapy drug infusion device, generally referring to a chemotherapy pump, to continuously and stably deliver the drug to the patient's body.

[0003] Existing chemotherapy pumps usually need to be fixed at the bedside during use, which is not convenient to use. Some portable chemotherapy pumps are in a state of shaking inside the pump body during use. During the suction and delivery process of the pump body, sometimes the pump body cannot accurately suck the drug into the pipeline due to the inversion of the drug. At this time, the drug dosage delivery is not accurate, which affects the treatment effect. Summary of the invention

[0004] The purpose of the present invention is to provide a portable chemotherapy drug precision infusion device that is easy to carry and can prevent drug shaking and unstable drug delivery, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable chemotherapy drug precision infusion device, comprising a body, an infusion mechanism, an exhaust mechanism and a medicine storage tank, wherein a pump casing is fixedly connected to the body, the infusion mechanism comprises a plurality of conveying plates installed in the pump casing, a driving column is rotatably connected in the pump casing, a side wall of the driving column is in contact with one side of the inner wall of the pump casing, and the conveying plate is driven to rotate by the driving column to accurately deliver the medicine in the medicine storage tank to the infusion tube, the exhaust mechanism comprises a sliding plate slidably connected to the inner wall of the medicine storage tank, a lightweight plate is slidably connected to the sliding plate, and a control tube is provided on the sliding plate One end of the control tube is connected to the outside world, and is used to connect the medicine storage tank with the outside world when the medicine is injected into the medicine storage tank, so as to maintain the air pressure balance in the medicine storage tank during the loading process. After the loading is completed, the sliding plate is controlled to move downward, and the excess air on the upper side is discharged to the outside world through the control tube until the upper side of the liquid surface of the medicine contacts the lightweight plate, so that the lightweight plate is floated and blocks the bottom end of the control tube, so that the medicine in the subsequent infusion process can be pushed by the sliding plate and continuously and stably transported to the inside of the pump casing, which is convenient for carrying and preventing the medicine from shaking and causing unstable drug delivery.

[0006] Preferably, the exhaust mechanism also includes a first spring fixedly mounted on the upper side of the sliding plate, the first spring having one end away from the sliding plate fixedly connected to the medicine storage tank, the upper side of the medicine storage tank is rotatably connected to a rotating ring, the control tube passes through the rotating ring and is slidably connected to the inner wall of the rotating ring, the rotating ring is provided with a limiting member for limiting the sliding plate when the control tube pulls up the sliding plate, so as to drive the sliding plate to continuously squeeze the medicine during the infusion process.

[0007] Preferably, the exhaust mechanism also includes a rotating block fixedly mounted on the bottom end of the control tube, the rotating block being rotatably connected to the sliding plate, a first pipe connected to the medicine storage tank is provided on the lightweight plate, the first pipe is L-shaped, and the bottom opening is horizontally arranged toward the side wall of the sliding plate, an annular pipe connected to the bottom end of the control tube is provided on the rotating block, and a plurality of second pipes connecting the upper end of the first pipe with the annular pipe are provided on the sliding plate, so as to facilitate the discharge of gas in the medicine storage tank and avoid unstable drug delivery due to drug shaking during carrying.

[0008] Preferably, the infusion mechanism also includes an input tube and an output tube fixedly installed inside the body, the input tube and the output tube are both connected to the pump casing, and the positions of the connecting points are respectively located on both sides of the driving column, and the driving column is evenly provided with a plurality of groups of driving grooves slidably connected to the conveying plate, one end of the conveying plate is fixedly connected to a second spring fixedly connected to the driving groove, and one end of the conveying plate away from the second spring is slidably fitted with the inner wall of the pump casing, and a driving member is provided in the body for driving the driving column to rotate while being able to stop and limit at any time, so that the conveying plate is driven to rotate by the driving column to accurately convey the medicine in the medicine storage tank to the infusion tube.

[0009] Preferably, the driving member includes a driving motor fixedly installed in the body, the output end of the driving motor is coaxially fixedly connected with a worm, the driving column is coaxially fixedly connected with a driving shaft, the driving shaft passes through the pump casing and is rotatably connected to the pump casing, and one end of the driving shaft is coaxially fixedly connected with a worm wheel meshing with the worm, so that the driving column can be driven to rotate and can be stopped and limited at any time.

[0010] Preferably, one end of the input tube is fixedly connected to a threaded tube, a threaded hole that can be threadedly connected to the threaded tube is opened on the medicine storage tank, and the threaded hole is used to connect the medicine storage tank and the input tube, a drug injection tube is opened on the side of the medicine storage tank, and a rubber plug is threadedly connected to the drug injection tube, and one end of the output tube can be connected to the infusion tube for easy disassembly and assembly of the medicine storage tank and delivery of drugs.

[0011] Preferably, the limiting member includes a plurality of groups of clamping rods fixedly mounted on the bottom end of the rotating ring, and the sliding plate is evenly provided with a plurality of groups of arc-shaped clamping grooves that can be slidably clamped with the bottom ends of the clamping rods, so as to limit the sliding plate when the control tube pulls up the sliding plate.

[0012] Preferably, a storage battery for powering the drive motor is provided in the body, which facilitates powering the drive motor and improves portability.

[0013] Preferably, the lightweight board is made of a lightweight plastic material, so that the lightweight board can be stably floated when in contact with the drug liquid surface.

[0014] Preferably, a filter screen for filtering and removing impurities from the incoming and outgoing gases is provided in the control tube, so as to facilitate filtering and removing impurities from the incoming and outgoing gases and prevent external impurities from entering the medicine storage tank.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The portable chemotherapy drug precision infusion device provided by the present invention solves the problem that when the existing portable chemotherapy drug infusion device is used, the drug is easy to shake inside the device, resulting in unstable drug infusion volume during the carrying and infusion process. The driving column on the infusion mechanism drives the conveying plate to rotate, and the drug in the drug storage tank is accurately conveyed to the infusion tube. When the drug is injected into the drug storage tank, the control tube connects the drug storage tank with the outside world to keep the air pressure balance in the drug storage tank during the loading process. After the loading is completed, the control sliding plate moves downward to discharge the excess air on the upper side to the outside through the control tube until the upper side of the drug liquid surface contacts the lightweight plate, so that the lightweight plate is floated and blocks the bottom end of the control tube, so that the drug in the subsequent infusion process can be pushed by the sliding plate and continuously and stably conveyed to the inside of the pump casing, so as to keep the continuous, accurate and stable conveying state and not be affected by the shaking of the drug. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the partial structure of the exhaust mechanism of the present invention; Figure 3 It is a schematic diagram of the partial structure of the infusion mechanism of the present invention; Figure 4 It is a schematic diagram of the local structure of the driving member of the present invention; Figure 5 This is a schematic diagram of the internal structure of the medicine storage tank of the present invention; Figure 6 It is a schematic diagram of the local structure of the limiting member of the present invention; Figure 7 for Figure 6A magnified image of area A; Figure 8 It is a partial structural cross-sectional view of the exhaust mechanism of the present invention; Fig. 9 for Figure 8 Enlarged view of area B; Fig.10 It is a cross-sectional view of the local structure of the rotating block of the present invention.

[0017] In the figure: 1-body; 2-drug storage tank; 3-pump housing; 4-infusion mechanism; 5-conveying plate; 6-driving column; 7-exhaust mechanism; 8-sliding plate; 9-lightweight plate; 10-control tube; 11-first spring; 12-rotating ring; 13-limiting member; 14-rotating block; 15-first pipeline; 16-annular tube; 17-second pipeline; 18-input pipe; 19-output pipe; 20-driving groove; 21-second spring; 22-driving member; 24-driving motor; 25-worm; 26-driving shaft; 27-worm gear; 29-threaded pipe; 30-threaded hole; 31-drug injection tube; 32-rubber plug; 33-clamping rod; 35-arc-shaped slot; 36-battery; 37-filter; 38-infusion tube. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0019] See also Figure 1-Figure 10 A portable chemotherapy drug precision infusion device shown in the figure includes a body 1, an infusion mechanism 4, an exhaust mechanism 7 and a medicine storage tank 2. A medicine injection tube 31 is provided on the side of the medicine storage tank 2, and a rubber plug 32 is threadedly connected to the medicine injection tube 31. A pump housing 3 is fixedly connected inside the body 1. The infusion mechanism 4 includes a plurality of conveying plates 5 installed in the pump housing 3. A driving column 6 is rotatably connected inside the pump housing 3. The side wall of the driving column 6 is in contact with one side of the inner wall of the pump housing 3, and is used to drive the conveying plate 5 to rotate through the driving column 6 to accurately convey the medicine in the medicine storage tank 2 to the infusion tube 38.

[0020] The exhaust mechanism 7 includes a sliding plate 8 slidably connected to the inner wall of the medicine storage tank 2, and a lightweight plate 9 is slidably connected to the sliding plate 8. The lightweight plate 9 is made of lightweight plastic material. A control tube 10 is provided on the sliding plate 8, and a filter screen 37 is provided in the control tube 10 for filtering and removing impurities from the incoming and outgoing gases. One end of the control tube 10 is connected to the outside world, and is used to connect the medicine storage tank 2 with the outside world when the medicine is injected into the medicine storage tank 2, so as to maintain the air pressure balance in the medicine storage tank 2 during the loading process. After the loading is completed, the sliding plate 8 is controlled to move downward, and the excess air on the upper side is discharged to the outside through the control tube 10 until the upper side of the liquid surface of the medicine contacts the lightweight plate 9, so that the lightweight plate 9 is floated and the bottom end of the control tube 10 is blocked, so that the medicine in the subsequent infusion process can be pushed by the sliding plate 8 and continuously and stably transported to the inside of the pump housing 3.

[0021] The exhaust mechanism 7 also includes a first spring 11 fixedly mounted on the upper side of the sliding plate 8, and one end of the first spring 11 away from the sliding plate 8 is fixedly connected to the medicine storage tank 2. A rotating ring 12 is rotatably connected to the upper side of the medicine storage tank 2. The control tube 10 passes through the rotating ring 12 and is slidably connected to the inner wall of the rotating ring 12. The rotating ring 12 is provided with a limit member 13 for limiting the sliding plate 8 when the control tube 10 pulls up the sliding plate 8. The limit member 13 includes a plurality of groups of clamping rods 33 fixedly mounted on the bottom end of the rotating ring 12, and a plurality of groups of arc-shaped clamping grooves 35 that can be slidably clamped with the bottom end of the clamping rods 33 are evenly arranged on the sliding plate 8.

[0022] The exhaust mechanism 7 also includes a rotating block 14 fixedly mounted on the bottom end of the control tube 10, the rotating block 14 is rotatably connected to the sliding plate 8, a first pipe 15 connected to the medicine storage tank 2 is opened on the lightweight plate 9, the first pipe 15 is L-shaped, and the bottom opening is horizontally arranged toward the side wall of the sliding plate 8, an annular pipe 16 connected to the bottom end of the control tube 10 is opened on the rotating block 14, and a plurality of second pipes 17 for connecting the upper end of the first pipe 15 with the annular pipe 16 are opened on the sliding plate 8.

[0023] In this embodiment, when injecting drugs, the body 1 is first placed on a horizontal table, and the control tube 10 is pulled up. The control tube 10 drives the rotating block 14 to move the sliding plate 8 upward inside the medicine storage tank 2, compressing the first spring 11. When the sliding plate 8 moves to the highest point, the control tube 10 is rotated to drive the rotating ring 12 to rotate, so that the clamping rod 33 rotates and is inserted into the arc-shaped clamping groove 35, so that the sliding plate 8 can be initially limited to prevent the first spring 11 from rebounding and pushing the sliding plate 8 to the lower side.

[0024] After the required amount of medicine is extracted through the needle, the needle is inserted into the rubber plug 32 to inject the medicine into the medicine storage tank 2. At this time, the air in the medicine storage tank 2 is connected to the outside through the first pipe 15, the second pipe 17, the annular pipe 16 and the control pipe 10. As the medicine is added, the original air in the medicine storage tank 2 will be discharged through the top of the control pipe 10, so that the medicine can be more conveniently injected into the medicine storage tank 2 while ensuring the air pressure balance in the medicine storage tank 2.

[0025] After the drug injection is completed, the control tube 10 is rotated in the opposite direction, so that the rotating ring 12 drives the clamping rod 33 to rotate in the opposite direction by a certain angle. After the clamping state with the arc-shaped clamping groove 35 is released, the control tube 10 is slowly released. As the first spring 11 rebounds, the sliding plate 8 is pushed downward. During the downward movement, the sliding plate 8 drives the lightweight plate 9 to move downward. At this time, the lightweight plate 9 is affected by gravity, and the bottom side of the first pipe 15 is still connected with the medicine storage tank 2. As the sliding plate 8 moves downward, the air in the medicine storage tank 2 is discharged to the outside through the first pipe 15, the second pipe 17, the annular pipe 16 and the control tube 10.

[0026] When the bottom of the lightweight plate 9 contacts the drug liquid surface, the liquid surface will float the lightweight plate 9, and the sliding plate 8 continues to move downward to block the bottom end of the first pipe 15, thereby cutting off the connection between the liquid in the medicine storage tank 2 and the outside world, preventing the drug from being discharged to the outside world through the first pipe 15, and automatically positioning the top of the liquid surface. In the subsequent carrying and use process, as the infusion mechanism 4 pumps the drug in the medicine storage tank 2, the sliding plate 8 will maintain the squeeze with the liquid surface under the push of the first spring 11, and will not be affected by the shaking angle of the medicine storage tank 2, thereby ensuring that the drug in the medicine storage tank 2 can be continuously and stably output to the pump housing 3 for infusion, thereby ensuring the stability and accuracy of the infusion process.

[0027] It should be noted that the air pressure in the upper area of ​​the sliding plate 8 can be connected to the outside through the through hole on the upper side of the medicine storage tank 2, ensuring that the stable sliding of the sliding plate 8 is not affected by the air pressure. At the same time, the original gas in the medicine storage tank 2 can be sterile gas after cleaning and disinfection. The rubber plug 32 can be rotated to open for replacement, and at the same time, the needle hole can be automatically closed after being pulled out to avoid leakage of medicine in the medicine storage tank 2. The bottom end of the clamping rod 33 is horizontal and can be rotated in the arc-shaped clamping groove 35 and clamped with the arc-shaped clamping groove 35. Embodiment 2

[0028] See also Figure 2-Figure 9, this embodiment further illustrates the first embodiment, the infusion mechanism 4 shown in the figure also includes an input tube 18 and an output tube 19 fixedly installed inside the body 1, the input tube 18 and the output tube 19 are both connected to the pump housing 3, and the positions of the connecting points are respectively located on both sides of the driving column 6, and the driving column 6 is evenly provided with a plurality of groups of driving grooves 20 slidably connected to the conveying plate 5, one end of the conveying plate 5 is fixedly connected to a second spring 21 fixedly connected to the driving groove 20, and one end of the conveying plate 5 away from the second spring 21 is slidably fitted with the inner wall of the pump housing 3, and a driving member 22 is provided in the body 1 for driving the driving column 6 to rotate while being able to stop and limit at any time, one end of the input tube 18 is fixedly connected to a threaded tube 29, and a threaded hole 30 that can be threadedly connected to the threaded tube 29 is provided on the medicine storage tank 2, and the threaded hole 30 is used to connect the medicine storage tank 2 and the input tube 18, and one end of the output tube 19 can be docked and connected with the infusion tube 38.

[0029] The driving member 22 includes a driving motor 24 fixedly installed in the body 1. The model of the driving motor 24 is preferably an LD60 micro motor. A battery 36 for powering the driving motor 24 is provided in the body 1. The output end of the driving motor 24 is coaxially fixedly connected with a worm 25. A driving shaft 26 is coaxially fixedly connected to the driving column 6. The driving shaft 26 passes through the pump housing 3 and is rotatably connected to the pump housing 3. One end of the driving shaft 26 is coaxially fixedly connected with a worm wheel 27 meshing with the worm 25.

[0030] In this embodiment, the threaded hole 30 on the medicine storage tank 2 is connected and fixed with the threaded tube 29, and then the medicine is injected into the medicine storage tank 2, the infusion tube 38 is docked and fixed with the output tube 19, and the drive motor 24 is started to drive the worm 25 to rotate, and the worm 25 drives the worm wheel 27 to rotate, so that the drive shaft 26 drives the drive column 6 to rotate, and the drive column 6 drives the surrounding conveying plates 5 to rotate. During the rotation of the conveying plate 5, since only the upper side of the drive column 6 and the inner wall of the pump housing 3 are in a fit state, when the conveying plate 5 rotates clockwise from the upper side to the lower side, the space between adjacent conveying plates 5 gradually increases, and the medicine in the medicine storage tank 2 can be drawn into the pump housing 3 through the threaded hole 30, the threaded tube 29 and the input tube 18 by negative pressure, and when the conveying plate 5 rotates from the lower side to the upper side, the space between adjacent conveying plates 5 gradually decreases, and the medicine can be squeezed and discharged from the output tube 19, thereby realizing the infusion function of the medicine.

[0031] Since the infusion rate of the drug inside the pump housing 3 is only accurately affected by the rotation speed of the conveying plate 5, the infusion rate can be accurately controlled by adjusting the rotation speed of the drive motor 24, and since the worm gear 27 here cannot drive the worm 25 to rotate, when the drive motor 24 stops running, the position of the drive shaft 26 can be automatically limited. After the position of the conveying plate 5 remains stable, the drug in the input tube 18 will not be transported to the output tube 19 under the push of the sliding plate 8, ensuring that the rate of the infusion process will not be affected by the push of the first spring 11.

[0032] It is worth noting that: by setting the second spring 21, one end of the conveying plate 5 is always in contact with and slides against the inner wall of the pump housing 3, so that the internal medicine is stably conveyed. After the drug infusion is completed, the medicine storage tank 2 can be unscrewed to clean the inside of the medicine storage tank 2. Since the medicine does not flow through the first pipe 15 and the second pipe 17, the cleaning of the medicine storage tank 2 only requires cleaning the inner wall of the medicine storage tank 2 and the bottom surfaces of the lightweight plate 9 and the sliding plate 8. The operation is convenient and efficient. When cleaning the inside of the pump housing 3, the medicine storage tank 2 filled with cleaning and disinfecting liquid can be docked with the input pipe 18, and the conveying plate 5 can be started to rotate to continuously convey the cleaning liquid in the pump housing 3 to achieve the cleaning function.

[0033] By replacing or charging the battery 36, the continuous and stable driving of the drive motor 24 can be guaranteed, which is convenient for carrying and use. The rotation of the drive motor 24 can be accurately controlled through the control screen on the body 1, thereby realizing accurate regulation of the drug infusion amount. The filter 37 can prevent external polluted gases from entering the control tube 10, thereby ensuring relative cleanliness of the control tube 10, the first pipe 15 and the second pipe 17.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable chemotherapy drug precision infusion device, characterized in that: include: A machine body (1) and a medicine storage tank (2), wherein a pump casing (3) is fixedly connected inside the machine body (1); Also includes: An infusion mechanism (4), the infusion mechanism (4) comprising a plurality of conveying plates (5) mounted in the pump housing (3), a driving column (6) rotatably connected in the pump housing (3), a side wall of the driving column (6) being in contact with one side of an inner wall of the pump housing (3), and being used for driving the conveying plate (5) to rotate through the driving column (6), so as to accurately convey the medicine in the medicine storage tank (2) to the infusion tube (38); An exhaust mechanism (7), the exhaust mechanism (7) comprising a sliding plate (8) slidably connected to the inner wall of the medicine storage tank (2), a light plate (9) slidably connected to the sliding plate (8), a control tube (10) being provided on the sliding plate (8), one end of the control tube (10) being connected to the outside, and being used for, when the medicine is injected into the medicine storage tank (2), allowing the control tube (10) to connect the medicine storage tank (2) with the outside, so as to maintain the air pressure balance in the medicine storage tank (2) during the medicine loading process; after the medicine loading is completed, controlling the sliding plate (8) to move downward, and exhausting the excess air on the upper side to the outside through the control tube (10), until the upper side of the liquid surface of the medicine contacts the light plate (9), so that the light plate (9) is floated and blocks the bottom end of the control tube (10), so that the medicine in the subsequent infusion process can be pushed by the sliding plate (8) and continuously and stably transported to the inside of the pump housing (3).

2. A portable chemotherapy drug precision infusion device according to claim 1, characterized in that: The exhaust mechanism (7) further comprises a first spring (11) fixedly mounted on the upper side of the sliding plate (8); one end of the first spring (11) away from the sliding plate (8) is fixedly connected to the medicine storage tank (2); a rotating ring (12) is rotatably connected to the upper side of the medicine storage tank (2); the control tube (10) passes through the rotating ring (12) and is slidably connected to the inner wall of the rotating ring (12); and a limiting member (13) is provided on the rotating ring (12) for limiting the position of the sliding plate (8) when the control tube (10) pulls up the sliding plate (8).

3. A portable chemotherapy drug precision infusion device according to claim 2, characterized in that: The exhaust mechanism (7) further comprises a rotating block (14) fixedly mounted on the bottom end of the control tube (10), the rotating block (14) being rotatably connected to the sliding plate (8), the lightweight plate (9) being provided with a first pipe (15) connected to the medicine storage tank (2), the first pipe (15) being L-shaped, and the bottom opening being arranged in a horizontal direction toward the side wall of the sliding plate (8), the rotating block (14) being provided with an annular pipe (16) connected to the bottom end of the control tube (10), and the sliding plate (8) being provided with a plurality of groups of second pipes (17) for connecting the upper end of the first pipe (15) with the annular pipe (16).

4. A portable chemotherapy drug precision infusion device according to claim 1, characterized in that: The infusion mechanism (4) further comprises an input tube (18) and an output tube (19) fixedly mounted inside the machine body (1); the input tube (18) and the output tube (19) are both connected to the pump housing (3), and the positions of the connecting points are respectively located on both sides of the driving column (6); the driving column (6) is evenly provided with a plurality of driving grooves (20) slidably connected to the conveying plate (5); one end of the conveying plate (5) is fixedly connected to a second spring (21) fixedly connected to the driving groove (20); one end of the conveying plate (5) away from the second spring (21) is slidably fitted to the inner wall of the pump housing (3); and a driving member (22) is provided inside the machine body (1) for driving the driving column (6) to rotate while being able to stop and limit at any time.

5. A portable chemotherapy drug precision infusion device according to claim 4, characterized in that: The driving member (22) comprises a driving motor (24) fixedly mounted in the machine body (1); an output end of the driving motor (24) is coaxially fixedly connected to a worm (25); a driving shaft (26) is coaxially fixedly connected to the driving column (6); the driving shaft (26) passes through the pump housing (3) and is rotationally connected to the pump housing (3); one end of the driving shaft (26) is coaxially fixedly connected to a worm wheel (27) meshing with the worm (25).

6. A portable chemotherapy drug precision infusion device according to claim 5, characterized in that: One end of the input tube (18) is fixedly connected to a threaded tube (29); a threaded hole (30) capable of being threadedly connected to the threaded tube (29) is provided on the medicine storage tank (2); the threaded hole (30) is used to connect the medicine storage tank (2) and the input tube (18); a medicine injection tube (31) is provided on the side of the medicine storage tank (2); a rubber plug (32) is threadedly connected to the medicine injection tube (31); and one end of the output tube (19) can be butt-jointed and connected to an infusion tube (38).

7. A portable chemotherapy drug precision infusion device according to claim 2, characterized in that: The limiting member (13) comprises a plurality of groups of clamping rods (33) fixedly mounted on the bottom end of the rotating ring (12), and the sliding plate (8) is evenly provided with a plurality of groups of arc-shaped clamping grooves (35) capable of slidingly clamping with the bottom ends of the clamping rods (33).

8. A portable chemotherapy drug precision infusion device according to claim 5, characterized in that: A storage battery (36) for supplying power to the drive motor (24) is provided in the machine body (1).

9. A portable chemotherapy drug precision infusion device according to claim 1, characterized in that: The lightweight plate (9) is made of a lightweight plastic material.

10. A portable chemotherapy drug precision infusion device according to claim 1, characterized in that: The control tube (10) is provided with a filter (37) for filtering and removing impurities from the inlet and outlet gases.

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