Nursing infusion equipment for tumor chemotherapy

Abstract

The invention relates to the technical field of infusion chemotherapy, in particular to nursing infusion equipment for tumor chemotherapy, which comprises a shell, a first pump body structure and a second pump body structure, wherein the first pump body structure and the second pump body structure are fixedly arranged in the shell; the first pump body structure comprises at least one pump body assembly, the pump body assembly comprises a pump shell and a plug ring arranged in the pump shell in a sliding mode, an infusion cavity is formed in the pump shell, and a driving unit used for driving the plug ring to slide is arranged at the bottom of the infusion cavity; the pump shell is provided with a first pipeline and a second pipeline which are communicated with the infusion cavity, the first pipeline and the second pipeline are both provided with one-way valves, the second pipeline is provided with a pulse adjusting part, and the pulse adjusting part can drive the second pipeline to be opened or closed; the technical problem that the synergistic treatment effect is weakened due to the fact that traditional infusion equipment cannot be dynamically adapted to infusion characteristics of different chemotherapeutics and combined scheme requirements due to a single mode is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tumor chemotherapy, and particularly relates to a nursing infusion device for tumor chemotherapy. Background Art

[0002] In the field of tumor chemotherapy, the accuracy and versatility of infusion devices are of great significance for improving the curative effect and reducing toxic and side effects; traditional infusion devices (such as infusion pumps) mostly adopt a single infusion mode and cannot dynamically adapt to the infusion characteristics of different chemotherapy drugs, resulting in significant limitations in clinical applications. For example, fluorouracil, paclitaxel, and some targeted drugs need to maintain a stable blood drug concentration through long-term stable infusion to reduce the damage of cytotoxicity to normal tissues and extend the drug action time; while drugs such as oxaliplatin, irinotecan, and gemcitabine need to adopt pulsed infusion at specific treatment stages (such as the sensitive period of the tumor cell cycle), and enhance tumor penetration and killing efficiency through periodic high-concentration drug shocks, while combining basic infusion to maintain the continuity of treatment. Due to the lack of a mode switching function in existing infusion devices, multiple infusion pumps often need to be used in parallel or manual flow rate adjustment is relied on frequently in clinical practice, which not only occupies equipment resources and increases the operation complexity, but also easily causes problems such as infusion interruption and blood drug concentration fluctuation due to flow rate switching delay or dosage error, and may even induce allergic reactions or increase the risk of cardiac and neurotoxicity in patients. In addition, some combined chemotherapy regimens need to alternately use different infusion modes in the same treatment course, which is difficult to achieve with traditional devices, resulting in a weakened synergistic treatment effect.

[0003] Therefore, in view of this, the inventor proposes a nursing infusion device for tumor chemotherapy to solve the above technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a nursing infusion device for tumor chemotherapy to solve the technical problem that the traditional infusion device cannot dynamically adapt to the infusion characteristics of different chemotherapy drugs and the requirements of combined regimens due to the single mode, resulting in a weakened synergistic treatment effect.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows: A nursing infusion device for tumor chemotherapy, comprising a housing and a first pump body structure and a second pump body structure fixedly arranged in the housing; The first pump body structure includes at least one pump body assembly. The pump body assembly includes a pump housing and a plug ring slidably disposed within the pump housing. An infusion chamber is formed within the pump housing, and a driving unit for driving the sliding of the plug ring is provided at the bottom of the infusion chamber. The driving unit is configured to increase or decrease the air pressure within the infusion chamber. The pump housing is provided with a first pipe and a second pipe that communicate with the infusion chamber. Check valves are provided on both the first pipe and the second pipe, and a pulse regulator is provided on the second pipe. The pulse regulator can drive the second pipe to open or close. At least one adjustment assembly is provided on one side of the pump housing, and the adjustment assembly is connected to the pulse regulator. It further includes a driving member, which is connected to the driving unit. The driving member can be connected to or disconnected from the adjustment assembly and the second pump body structure simultaneously.

[0006] According to the above technical solution, in the first pump body structure, the driving unit drives the plug ring to reciprocate within the infusion chamber. Through the air pressure change, the chemotherapy liquid medicine is sucked into the infusion chamber unidirectionally through the first pipe, and then output unidirectionally through the second pipe. When the adjustment assembly is activated, it periodically pulls the pulse regulator through mechanical linkage or electromagnetic action, causing the second pipe to open and close at a high frequency, forming a pulsed liquid medicine output. The second pump body structure drives the bladder to alternately contract and expand through the power transmission of the driving member, and cooperates with the check valve to achieve continuous and stable liquid supply in the basic infusion mode. The driving member controls the start and stop of the second pump body structure through the engagement or separation state of the connector. When dual-mode collaborative infusion is required, the first pump body performs pulsed impact, and the second pump body synchronously maintains a stable infusion flow rate. When only a single mode is needed, the connection of the corresponding pump body can be disconnected to achieve flexible switching. The device ensures seamless connection and precise control of the two infusion modes through mechanical or electromagnetic linkage mechanisms, meeting the infusion requirements of different chemotherapy drugs.

[0007] Further, the driving unit includes a first driving shaft, a first eccentric block, and a first connecting rod. The first eccentric block is fixedly provided on the first driving shaft. One end of the first connecting rod is movably connected to the first eccentric block, and the other end of the first connecting rod is movably connected to the plug ring. A driving gear is mounted on the first driving shaft.

[0008] According to the above technical solution, the nursing infusion device drives the first drive shaft to rotate through a driving member (such as a motor). The first eccentric block fixed on the first drive shaft rotates with the shaft, forming a circular motion trajectory. One end of the first connecting rod is movably connected to the eccentric block, and the other end is hinged to the plug ring in the pump housing, thereby converting the rotational motion of the eccentric block into a linear reciprocating sliding of the plug ring in the infusion cavity. When the plug ring slides towards the top of the infusion cavity, the cavity volume decreases, the air pressure increases, and the liquid medicine is pushed out through the second pipeline; when the plug ring slides in the reverse direction, the cavity volume increases to form a negative pressure, and the liquid medicine is inhaled through the first pipeline. The driving gear on the first drive shaft meshes with other transmission components, synchronously transmitting power to the adjustment assembly or the second pump body structure to achieve the linkage control of the infusion mode. Through the rotational phase of the eccentric block and the transmission relationship of the connecting rod, the reciprocating frequency and stroke of the plug ring are precisely adjusted, thereby controlling the flow rate and pressure change of the liquid medicine inhalation and discharge.

[0009] Further, the adjustment assembly includes a second drive shaft, a dial rod, and a swinging member. The dial rod is slidably arranged on one side of the housing. The swinging member is arranged between the second drive shaft and the dial rod. The swinging member has a first state for driving the second pipeline to open and a second state for closing the second pipeline. The second drive shaft is used to drive the swinging member to switch between the first state and the second state. A driven gear is coaxially installed on the second drive shaft, and the driven gear meshes with the driving gear.

[0010] Further, the swinging member includes a swing arm rotatably sleeved on the dial rod. The swing arm has a first end and a second end. A driving rod is hinged to the second end of the swing arm, and a counterweight block is fixedly arranged at the bottom of the driving rod. A cam is coaxially connected to the second drive shaft. The dial rod can drive the swing arm, the driving rod, and the counterweight block to move. When the counterweight block contacts the cam, the cam is used to drive the counterweight block to move up and down, and the counterweight block drives the swing arm to rotate around the dial rod through the driving rod.

[0011] According to the above technical solution, the driving member drives the driven gear on the second driving shaft to rotate synchronously through the driving gear, driving the adjustment assembly to work. When the second driving shaft rotates, the swinging member thereon performs a periodic swinging motion. When the swinging member is in the first state, it mechanically links and pulls the pulse regulating member to close the second pipe and not allow the output of the liquid medicine pulse; when the swinging member switches to the second state, the pulse regulating member is released, and the blocking member opens the second pipe under the action of the spring to allow the output of the liquid medicine pulse. The lever controls the opening and closing frequency and duration of the second pipe by sliding to adjust the movement amplitude or phase of the swinging member. The periodic motion of the adjustment assembly is synchronized with the reciprocating motion of the plug ring of the driving unit, ensuring that the high-frequency opening and closing of the second pipe in the pulse infusion mode is accurately matched with the inhalation-discharge rhythm of the liquid medicine, and realizing the stable control of the pulse flow rate.

[0012] Further, the second pipe includes a first liquid outlet pipe and a second liquid outlet pipe, and the pulse regulating member is arranged between the first liquid outlet pipe and the second liquid outlet pipe; The pulse regulating member includes a pulse shell fixedly arranged on the top of the shell. A liquid channel is arranged in the pulse shell. The liquid channel is communicated with the first liquid outlet pipe and the second liquid outlet pipe. A block is slidably arranged in the pulse shell. A blocking member is fixedly arranged on the block. A tension spring is arranged in the pulse shell, and the tension spring has a tendency to drive the blocking member away from the liquid channel; A connecting portion is arranged on the block, and a connecting rope is connected to the connecting portion. The connecting rope is connected to the first end of the swing arm.

[0013] According to the above technical solution, the pulse regulating member realizes the periodic opening and closing of the second pipe through mechanical linkage. When the swing arm of the adjustment assembly is driven to swing, its first end pulls the block in the pulse shell to slide through the connecting rope, driving the blocking member to move towards the liquid channel against the resistance of the tension spring to close the channel and block the outflow of the liquid medicine through the second pipe. When the swing arm resets, the tension spring rebounds to make the block slide in the reverse direction, and the blocking member disengages from the liquid channel to resume the output of the liquid medicine. During this process, the periodic swing of the swing arm is transmitted to the block through the connecting rope, causing the blocking member to reciprocate at a high frequency, resulting in the second pipe being alternately opened and closed in the pulse mode, forming a pulse waveform of the liquid medicine output. The first liquid outlet pipe and the second liquid outlet pipe ensure the one-way flow of the liquid medicine through the one-way valve to prevent backflow. The design of the liquid channel in the pulse shell enables the liquid medicine to be concentratedly output through the second liquid outlet pipe when the channel is opened, realizing the coordinated or independent control of the pulse flow rate and the basic infusion.

[0014] Further, the number of the pump body assemblies is two, and the driving units arranged in the two pump body assemblies are arranged in the same way or symmetrically.

[0015] According to the above technical solution, if the two drive units are set in the same way, the two pump body components can work independently and synchronously. They can suck different chemotherapy drugs through their respective first pipelines and output synchronously through the second pipelines, realizing the parallel infusion of double drugs, which is applicable to special treatment scenarios that require combined drug use. If the drive units are symmetrically arranged, the reciprocating motion phases of the two plug rings are opposite: when one infusion chamber is compressed by the drive unit to discharge liquid, the other infusion chamber expands synchronously to suck liquid, and the two alternately complete the suction and discharge actions. This symmetric drive mechanism eliminates the flow interruption during the liquid suction stage of a single pump body, enables the output cycles of the two pump bodies to be complementary and superimposed, forms a continuous and stable liquid flow, effectively reduces pulsation interference, and improves the infusion smoothness. The two configuration modes are flexibly adapted to the infusion requirements of different chemotherapy regimens through the differential design of the mechanical structure.

[0016] Further, the second pump body structure includes two symmetrically arranged bellows, a third pipeline and a fourth pipeline. One-way valves are arranged in both the third pipeline and the fourth pipeline, and both the third pipeline and the fourth pipeline are communicated with the two bellows; A connector is arranged on the first drive shaft. An eccentric rod is eccentrically arranged at one end of the connector close to the second pump body structure. A first connecting block is rotatably connected to the eccentric rod. Two push rods are hinged on the first connecting block. The two push rods are respectively connected to the two bellows. When the connector rotates, one of the push rods drives the corresponding bellows to contract, and the other push rod drives the bellows to expand.

[0017] According to the above technical solution, the second pump body structure drives the two bellows to alternately contract and expand through the eccentric motion of the connector to realize the basic infusion mode. When the driving member drives the first drive shaft to rotate, the eccentric rod of the connector rotates accordingly, and the eccentric rotational motion is converted into the alternating reciprocating actions of the two push rods through the first connecting block. The push rods are respectively connected to the symmetrically arranged bellows. When one push rod pushes the bellows to make it contract, the liquid medicine in the corresponding bellows is squeezed and output through the one-way valve in the fourth pipeline; at the same time, the other push rod moves in the opposite direction, driving the other bellows to expand to form a negative pressure and sucking the liquid medicine through the third pipeline. The alternating compression and expansion of the two bellows form a continuous and stable basic infusion flow rate with the cooperation of the one-way valve, ensuring the continuous delivery of chemotherapy drugs. The cooperation between the rotation phase of the eccentric rod and the stroke of the push rod further optimizes the coordination of the bellows actions, thereby realizing the efficient and stable basic infusion function.

[0018] Furthermore, the connector includes a first housing, a second housing, and a pull rod. The first housing is fixedly connected to the first drive shaft. An insertion pin and a slip ring are provided on the first housing. The slip ring is slidably connected to the first housing through the insertion pin. A first meshing tooth is provided on one side of the slip ring close to the second housing, and a second meshing tooth is provided on one side of the second housing close to the slip ring. One end of the pull rod is fixedly connected to the slip ring, and the other end of the pull rod is fixedly connected to the lever.

[0019] According to the above technical solution, the connector realizes the power transmission and start-stop control of the second pump body structure through mechanical meshing. When the lever is operated, it pulls the slip ring to slide axially along the insertion pin through the pull rod, so that the first meshing tooth on the slip ring meshes with the second meshing tooth on the second housing. At this time, the rotational power of the first drive shaft is transmitted to the eccentric rod through the connector. When the eccentric rod rotates with the drive shaft, it drives the two push rods to alternately push and pull the symmetrical bellows through the first connecting block, so that one bellows contracts to extrude the liquid medicine, and the other bellows expands to inhale the liquid medicine, and the one-way valves of the third and fourth pipelines are coordinated to realize continuous liquid supply for basic infusion. When the lever is reset, the slip ring slides in the reverse direction to separate the meshing teeth, and the second pump body structure stops working, and only the first pump body is left to perform pulse infusion. This mechanical meshing design can realize the flexible switching between the coordinated or independent operation of the double pump bodies through the simple operation of the lever.

[0020] Furthermore, the connector includes a first housing, a second housing, and a pull rod. The first housing is fixedly connected to the first drive shaft. An insertion pin and a slip ring are provided on the first housing. The slip ring is slidably connected to the first housing through the insertion pin. A screw rod is fixedly provided on the slip ring, and the end of the screw rod passes through the first housing and is connected with a nut. A spring is provided between the nut and the first housing, and the spring has a tendency to drive the slip ring away from the second housing; A first meshing tooth is provided on one side of the slip ring close to the second housing, and a second meshing tooth is provided on one side of the second housing close to the slip ring. One end of the pull rod is fixedly connected to the slip ring, and the other end of the pull rod is fixedly connected to the lever; An electromagnet is provided in the second housing, a heating coil is sleeved on the outer periphery of the pump housing, and both the electromagnet and the heating coil are connected to a power supply.

[0021] According to the above technical solution, the nursing infusion device realizes the power coupling and separation of the second pump body structure through electromagnetic control. When the electromagnet is powered on, the magnetic suction force generated by it overcomes the resistance of the spring, attracting the slip ring to slide towards the second seat body, causing the first meshing tooth to mesh with the second meshing tooth. At this time, the rotational power of the first drive shaft is transmitted to the eccentric rod through the connector, driving the two push rods to alternately compress the leather bag to achieve the basic infusion mode. At the same time, the screw on the slip ring is locked by the nut with the sliding displacement, and the spring is compressed to store energy to ensure the meshing stability. After the heating coil is powered on, it controls the temperature of the pump shell and the liquid medicine to prevent drug crystallization or temperature fluctuation. When it is necessary to switch the mode, the electromagnet is powered off, the magnetic suction force disappears, the spring pushes the slip ring to reset and disengage, and the second pump body stops working; at this time, only the first pump body performs pulsed infusion. The combination of electromagnetic control and mechanical self-locking mechanism realizes the rapid response and reliable switching of the power transmission of the double pump body, and at the same time, the temperature control function ensures the safety of the liquid medicine infusion.

[0022] Further, the driving member is a motor, the motor is arranged on one side of the housing, and the output shaft of the motor is coaxially connected with the driving gear.

[0023] According to the above technical solution, the nursing infusion device is powered by a motor, and its output shaft directly drives the first drive shaft and the driving gear fixed at the shaft end to rotate. The driving gear transmits the power to the driving unit of the first pump body structure, drives the eccentric block to rotate, and makes the plug ring reciprocate in the infusion cavity through the link mechanism to complete the inhalation and discharge of the liquid medicine. At the same time, the driving gear meshes with the driven gear of the adjustment component, drives the second drive shaft to rotate, makes the swing member swing periodically, and pulls the blocking member of the pulse adjusting member through the connecting rope to realize the pulsed on-off of the second pipeline. The power of the motor is also transmitted to the eccentric rod of the second pump body structure through a connector (mechanical meshing or electromagnetic coupling), driving the two leather bags to alternately contract and expand, and cooperating with the one-way valve to form a basic infusion flow rate. The start and stop of the motor and the meshing state of the connector control the coordinated or independent operation of the double pump body, ensuring the flexible switching of the pulse impact and continuous infusion modes as required.

[0024] Advantages of the present invention: Through the original double-pump body collaborative architecture, the present invention breaks through the limitations of the single mode of traditional infusion devices. The pulse adjustment component of the first pump body structure and the leather bag drive system of the second pump body structure cooperate through mechanical or electromagnetic linkage, and can switch between pulsed impact infusion and continuous basic infusion modes in real time according to the characteristics of chemotherapy drugs. In the scenario of combined chemotherapy, the device can synchronously perform high-concentration pulsed infusion of oxaliplatin and stable infusion of fluorouracil. Through the synergistic effect of periodic impact to enhance tumor penetration and basic dose to maintain efficacy, it not only avoids the problem of pipeline complexity caused by parallel operation of multiple devices, but also this dynamic switching mechanism significantly reduces the probability of complications such as cardiotoxicity and neurotoxicity, providing a safe and reliable technical support for the implementation of complex chemotherapy regimens.

[0025] The mechanical engagement version of the present invention can complete the clutch control of the basic infusion pump through the operation of the lever, enabling the device to quickly switch between single-drug continuous infusion and dual-drug synergistic mode; the electromagnetic control version further integrates the temperature control coil and the magnetic attraction clutch mechanism, while achieving power distribution, performing real-time heating and anti-crystallization treatment on heat-sensitive drugs. This modular design enables the device to not only meet the constant-temperature continuous infusion of paclitaxel drugs, but also cope with the pulsed-basal alternating infusion plan of gemcitabine combined with oxaliplatin. By replacing the traditional multi-pump parallel connection mode through the adaptive recombination of the physical structure, the operation and maintenance cost of the device is greatly reduced, providing a highly flexible hardware platform for the precise implementation of individualized chemotherapy regimens.

[0026] Other advantages, objectives, and features of the present application will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present application. The objectives and other advantages of the present application can be achieved and obtained through the following specific implementation manners. Brief Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the overall structure of the nursing infusion device for tumor chemotherapy of the present invention; Figure 2 It is a schematic diagram of the partial structure (view Figure 1 ) of the nursing infusion device for tumor chemotherapy of the present invention; Figure 3 It is a schematic diagram of the partial structure (view Figure 2 ) of the nursing infusion device for tumor chemotherapy of the present invention; Figure 4 It is a schematic diagram of the structure of part A in the nursing infusion device for tumor chemotherapy of the present invention Figure 3 ; Figure 5 It is a schematic diagram of the partial structure (view Figure 3 ) of the nursing infusion device for tumor chemotherapy of the present invention; Figure 6 It is a schematic cross-sectional view of the structure of the first pump body in the nursing infusion device for tumor chemotherapy of the present invention; Figure 7 It is in the nursing infusion device for tumor chemotherapy of the present invention Figure 6 a schematic diagram of the structure of part B; Figure 8 It is a schematic diagram of the overall structure of the first pump body in the nursing infusion device for tumor chemotherapy of the present invention; Figure 9 It is a schematic cross-sectional view of the structure of the first pump body in one implementation manner of the nursing infusion device for tumor chemotherapy of the present invention; Figure 10 It is a schematic cross-sectional structure diagram of the first pump body structure in another implementation manner of the nursing infusion device for tumor chemotherapy of the present invention; Figure 11 It is a schematic structure diagram of the driving unit in the nursing infusion device for tumor chemotherapy of the present invention; Figure 12 It is a schematic partial structure diagram of the nursing infusion device for tumor chemotherapy of the present invention; Figure 13 It is a schematic diagram of the partial structure (view Figure 4 ) of the nursing infusion device for tumor chemotherapy of the present invention; Figure 14 It is a schematic overall structure diagram of the connector in the nursing infusion device for tumor chemotherapy of the present invention; Figure 15 It is a schematic cross-sectional structure diagram of a kind of connector in the nursing infusion device for tumor chemotherapy of the present invention; Figure 16 It is a schematic cross-sectional structure diagram of another connector in the nursing infusion device for tumor chemotherapy of the present invention; Figure 17 It is a schematic cross-sectional view of another implementation manner of the first pump body structure in the nursing infusion device for tumor chemotherapy of the present invention.

[0028] Wherein, the housing 1, the first pump body structure 2, the pump housing 21, the plug ring 22, the infusion cavity 23, the driving unit 24, the first driving shaft 241, the first eccentric block 242, the first connecting rod 243, the driving gear 244, the first pipeline 25, the second pipeline 26, the first liquid outlet pipe 261, the air flow balance pipe 2611, the partition plate 2612, the second liquid outlet pipe 262, the pulse adjusting member 27, the pulse housing 271, the liquid channel 272, the block body 273, the blocking member 274, the tension spring 275, the connecting portion 276, the connecting rope 277, the adjusting assembly 28, the second driving shaft 281, the lever 282, the swinging member 283, the swing arm 2831, the driving rod 2832, the counterweight block 2833, the cam 2834, the driven gear 284, the second pump body structure 3, the leather bag 31, the third pipeline 32, the fourth pipeline 33, the driving member 4, the main liquid inlet pipeline 321, the first liquid inlet pipeline 322, the second liquid inlet pipeline 323, the main liquid outlet pipeline 331, the first liquid outlet pipeline 332, the second liquid outlet pipeline 333, the connector 5, the eccentric rod 51, the first connecting block 52, the push rod 53, the first seat body 54, the second seat body 55, the pull rod 56, the plug pin 57, the sliding ring 58, the first meshing tooth 591, the second meshing tooth 592, the screw 60, the nut 61, the spring 62, the electromagnet 63, the heating coil 64. Specific embodiments

[0029] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.

[0030] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the layout type of its components may also be more complex.

[0031] This embodiment provides a nursing infusion device for tumor chemotherapy, as Figures 1 to 16 shown, which includes a housing 1 and a first pump body structure 2 and a second pump body structure 3 fixedly arranged in the housing 1; The first pump body structure 2 includes at least one pump body component, as Figure 6 shown. The pump body component includes a pump housing 21 and a plug ring 22 slidably arranged in the pump housing 21. An infusion cavity 23 is formed in the pump housing 21. A driving unit 24 for driving the plug ring 22 to slide is arranged at the bottom of the infusion cavity 23. The driving unit 24 is used to drive the plug ring 22 to move to increase or decrease the air pressure in the infusion cavity 23. A first pipe 25 and a second pipe 26 communicating with the infusion cavity 23 are arranged on the pump housing 21. Check valves are arranged on both the first pipe 25 and the second pipe 26. When the chemotherapy liquid medicine enters the infusion cavity 23, the check valve of the first pipe 25 opens, and the check valve of the second pipe 26 closes. Similarly, when the chemotherapy liquid medicine flows out of the infusion cavity 23, the check valve of the first pipe 25 closes, and the check valve of the second pipe 26 opens. A pulse adjusting member 27 is arranged on the second pipe 26. The pulse adjusting member 27 can drive the second pipe 26 to open or close. At least one adjusting component 28 is arranged on one side of the pump housing 21. The adjusting component 28 is connected to the pulse adjusting member 27. It further includes a driving member 4, and the driving member 4 is connected to the driving unit 24. The driving member 4 can be connected to or disconnected from the adjusting component 28 and the first pump body structure 2 simultaneously.

[0032] In the pump body assembly structure, the driving member 4 serves as a power source to drive the driving unit 24 to work. When the adjustment assembly 28 is not activated, the driving unit 24 drives the plug ring 22 to reciprocate up and down in the infusion chamber 23. Through the air pressure change, the chemotherapy liquid medicine is unidirectionally inhaled into the infusion chamber 23 through the first pipeline 25, and then unidirectionally and stably output through the second pipeline 26. When the adjustment assembly 28 is activated, the pulse adjustment member 27 is periodically pulled by a mechanical linkage method or an electromagnetic action method, so that the second pipeline 26 is opened and closed at a high frequency, forming a pulsed liquid medicine output. The first pump body structure 2 drives the leather bag 31 to alternately contract and expand through the power transmission of the driving member 4, and cooperates with the one-way valve to realize the continuous and stable liquid supply of the basic infusion mode. The driving member 4 controls the start and stop of the first pump body structure 2 through the engagement or separation state of the connector 5. When dual-mode collaborative infusion is required, the first pump body structure 2 performs pulsed impact infusion or stable infusion, and the second pump body synchronously maintains stable infusion. When only a single mode is required, the connection of the corresponding second pump body can be disconnected to achieve flexible switching, ensuring seamless connection and precise control of multiple infusion modes, and meeting the infusion requirements of different chemotherapy drugs.

[0033] In a possible implementation manner, as Figure 17 shown, a partition plate 2612 is arranged above the plug ring 22. The partition plate 2612 divides the infusion chamber 23 into two chambers. The air flow between the two chambers is balanced through the air flow balance pipe 2611. The two chambers divided by the partition plate 2612 dynamically balance the air pressure through the air flow balance pipe 2611. When the plug ring 22 moves, the air flow balance pipe 2611 allows gas to flow between the chambers, reducing the sudden change in pressure in a single chamber, making the process of liquid medicine inhalation and discharge smoother, and at the same time being able to reduce the contact between the chemotherapy liquid medicine and the plug ring 22, improving the safety of chemotherapy drugs.

[0034] As a preferred implementation manner, as Figure 11 shown, the driving unit 24 includes a first driving shaft 241, a first eccentric block 242 and a first connecting rod 243. The first eccentric block 242 is fixedly arranged on the first driving shaft 241. The bottom end of the first connecting rod 243 is rotatably connected to the first eccentric block 242, and the top end of the first connecting rod 243 is hinged to the plug ring 22. A driving gear 244 is installed on the left side of the first driving shaft 241. In this embodiment, the driving member 4 is a motor. As Figure 1 shown, the motor is arranged on the right side of the housing 1, and the output shaft of the motor extends into the housing 1 and is coaxially connected to the driving gear 244.

[0035] In this embodiment, the nursing infusion device drives the first drive shaft 241 to rotate through a driving member 4 (such as a motor). The first eccentric block 242 fixed on the first drive shaft 241 rotates with the first drive shaft 241, forming a circular motion trajectory. One end of the first connecting rod 243 is movably connected to the eccentric block, and the other end is hinged to the plug ring 22 in the pump housing 21, thereby converting the rotational motion of the eccentric block into a linear reciprocating slide of the plug ring 22 in the infusion chamber 23. When the plug ring 22 slides towards the top of the infusion chamber 23, the volume of the infusion chamber 23 decreases, the air pressure increases, the first pipeline 25 closes, and the chemotherapy liquid medicine is pushed out through the second pipeline 26. When the plug ring 22 slides in the reverse direction, the volume of the infusion chamber 23 increases to form a negative pressure, the second pipeline 26 closes, and the chemotherapy liquid medicine is inhaled through the first pipeline 25.

[0036] As a preferred embodiment, as Figure 8 shown, the adjustment assembly 28 includes a second drive shaft 281, a lever 282, and a swinging member 283. The lever 282 is slidably arranged on one side of the housing 1. The lever 282 can slide left or right. The swinging member 283 is arranged between the second drive shaft 281 and the lever 282. The swinging member 283 has a first state of driving the second pipeline 26 to open and a second state of closing the second pipeline 26. The second drive shaft 281 is used to drive the swinging member 283 to switch between the first state and the second state; a driven gear 284 is coaxially installed on the second drive shaft 281, and the driven gear 284 meshes with the driving gear 244.

[0037] In this embodiment, the driving gear 244 on the first drive shaft 241 meshes with the driven gear 284, synchronously transmitting power to the adjustment assembly 28, and finally driving the swinging member 283 to switch between the first state and the second state, realizing the linkage control of the infusion mode.

[0038] As a preferred embodiment, as Figure 8 shown, the swinging member 283 includes a swing arm 2831 rotatably sleeved on the lever 282. It should be noted that the swing arm 2831 can only rotate around the lever 282, but cannot slide on the lever 282; the swing arm 2831 has a first end and a second end. As Figure 6 shown, the right side of the swing arm 2831 is the first end, and the left side of the swing arm 2831 is the second end; as Figure 8As shown, a driving rod 2832 is hinged to the second end of the swing arm 2831, and a counterweight 2833 is fixedly arranged at the bottom of the driving rod 2832; a cam 2834 is coaxially connected to the second driving shaft 281; the lever 282 can drive the swing arm 2831, the driving rod 2832 and the counterweight 2833 to move. When the lever 282 drives the swing arm 2831, the driving rod 2832 and the counterweight 2833 to move to the right simultaneously, at this time, the bottom of the counterweight 2833 is misaligned with the cam 2834, and the counterweight 2833 does not contact the cam 2834. When the cam 2834 rotates, it cannot drive the counterweight 2833 to move up and down, and thus the swing arm 2831 cannot periodically pull the pulse adjusting member 27. At this time, the second pipeline 26 is always in an open state, and the chemotherapy liquid medicine is unidirectionally sucked into the infusion cavity 23 through the first pipeline 25 and then unidirectionally output through the second pipeline 26.

[0039] When the lever 282 moves to the left, the lever 282 drives the swing arm 2831, the driving rod 2832 and the counterweight 2833 to move to the left. When the counterweight 2833 moves to the left, the bottom of the counterweight 2833 contacts the cam 2834, and when the cam 2834 rotates, it drives the counterweight 2833 to move up and down. It should be noted that when the counterweight 2833 moves to the left, it may occur that the bottom of the counterweight 2833 corresponds to the highest point of the lift of the cam 2834. At this time, the highest point of the lift of the cam 2834 is at the top, and the counterweight 2833 cannot slide to the rotor surface of the cam 2834. The form of controlling the rotation of the driving member 4 can be adopted to make the cam 2834 rotate by a certain angle, so that the lowest point of the lift of the cam 2834 is at the top, and then the lever 282 drives the counterweight 2833 to move to the left, and the counterweight 2833 slides to the rotor surface of the cam 2834. At this time, the bottom of the counterweight 2833 contacts the cam 2834, realizing the connection between the counterweight 2833 and the cam 2834; it should be noted that the contact or separation between the counterweight 2833 and the cam 2834 is a structure well-known to those skilled in the art.

[0040] Embodiment 1 When the counterweight 2833 contacts the cam 2834 (corresponding to Figure 8 ), the rotation of the cam 2834 can drive the counterweight 2833 to move up and down periodically. The counterweight 2833 drives the swing arm 2831 to rotate around the lever 282 through the driving rod 2832. The driving member 4 drives the driven gear 284 on the second driving shaft 281 to rotate synchronously through the driving gear 244, driving the adjustment assembly 28 to work. When the second driving shaft 281 rotates, the swinging member 283 thereon performs a periodic swinging motion. When the swinging member 283 is in the first state, it mechanically links and pulls the pulse adjusting member 27 to close the second pipeline 26 and does not allow the chemotherapy liquid medicine to be pulsed out; when the swinging member 283 switches to the second state (corresponding to Figure 7) Release the pulse adjustment member 27. Under the action of the tension spring 275, the blocking member 274 opens the second pipeline 26, allowing the pulsed output of the liquid medicine. In this embodiment, by adopting the form of sharing the same driving source, while realizing the inhalation and discharge of the chemotherapy liquid medicine, it also drives the adjustment assembly 28 to work. The periodic movement of the adjustment assembly 28 is synchronized with the reciprocating movement of the plug ring 22 connected to the driving unit 24, realizing the high-frequency opening and closing of the second pipeline 26 in the pulsed infusion mode, which is applicable to the treatment of chemotherapy that requires pulsed infusion to enhance tumor penetration. For example, if the chemotherapy drug is oxaliplatin or irinotecan, it requires periodic high-concentration impact to avoid toxicity accumulation caused by long-term exposure.

[0041] Embodiment 2 As a preferred embodiment, as Figure 6 and Figure 7 shown, the second pipeline 26 includes a first liquid outlet pipe 261 and a second liquid outlet pipe 262, and the pulse adjustment member 27 is arranged between the first liquid outlet pipe 261 and the second liquid outlet pipe 262. The pulse adjustment member 27 includes a pulse housing 271 fixedly arranged on the top of the housing 1. A liquid channel 272 is arranged in the pulse housing 271. The liquid channel 272 is communicated with the first liquid outlet pipe 261 and the second liquid outlet pipe 262. A block 273 is slidably arranged in the pulse housing 271. A blocking member 274 is fixedly arranged on the block 273. The blocking member 274 is located at the position of the liquid channel 272. The blocking member 274 can block or open the liquid channel 272. A tension spring 275 is arranged in the pulse housing 271. One end of the tension spring 275 is connected to the pump housing 21, and the other end of the tension spring 275 is connected to the block 273. The tension spring 275 is used to drive the block 273 to move downward. Furthermore, the tension spring 275 has a tendency to drive the blocking member 274 away from the liquid channel 272 (that is, Figure 7 in, the tendency of the tension spring 275 to drive the block 273 and the blocking member 274 to move downward). When the blocking member 274 moves downward, the blocking member 274 no longer blocks the liquid channel 272, and the liquid channel 272 is opened. A connecting portion 276 is arranged on the block 273, and a connecting rope 277 is connected to the connecting portion 276. The connecting rope 277 is connected to the first end of the swing arm 2831. It should be noted that when the lever 282 moves left and right, although the position of the connecting rope 277 will change, it will not drive the block 273 to move. Only when the swing arm 2831 rotates between the first state and the second state will the block 273 be driven to move through the connecting rope 277. It is applicable to chemotherapy liquid medicines that require continuous and stable infusion to maintain the blood drug concentration, such as fluorouracil, to avoid mucosal toxicity caused by concentration fluctuations.

[0042] In this embodiment, the pulse adjusting member 27 realizes the periodic opening and closing of the second pipeline 26 through mechanical linkage. When the swing arm 2831 of the adjustment assembly 28 is driven to swing, its first end pulls the block 273 in the pulse housing 271 upward through the connecting rope 277, driving the sealing member 274 to move towards the liquid channel 272 against the resistance of the tension spring 275 (that is, Figure 7 in, the sealing member 274 moves upward), closing the liquid channel 272 to block the outflow of the chemotherapy liquid medicine through the second pipeline 26. When the swing arm 2831 resets, the block 273 is no longer pulled by the connecting rope 277, and the tension spring 275 rebounds to make the block 273 slide in the reverse direction (slide downward), the sealing member 274 disengages from the liquid channel 272, the liquid channel 272 is opened, and the liquid medicine output is restored. During this process, the periodic swing of the swing arm 2831 is transmitted to the block 273 through the connecting rope 277, causing the sealing member 274 to reciprocate at a high frequency, resulting in the second pipeline 26 being alternately opened and closed in a pulse mode, forming a pulse waveform of the liquid medicine output. The first liquid outlet pipe 261 and the second liquid outlet pipe 262 ensure the one-way flow of the liquid medicine through the one-way valve to prevent backflow. The design of the liquid channel 272 in the pulse housing 271 enables the chemotherapy liquid medicine to be concentratedly output through the second liquid outlet pipe 262 when the channel is opened, realizing the coordinated or independent control of the pulse flow rate and the basic infusion. The switching between the pulse infusion and the smooth infusion can be applied to the combined infusion plan: for example, first pulse-infuse oxaliplatin, and then switch to the smooth infusion of fluorouracil to achieve seamless connection.

[0043] As a preferred embodiment, as Figure 9 and Figure 10 shown, the number of the pump body assemblies is two, and the driving units 24 arranged in the two pump body assemblies are arranged in the same or symmetrical manner.

[0044] Embodiment Three As Figure 9 shown, if the two driving units 24 are arranged in the same way, the two pump body assemblies can work independently and synchronously, inhale different chemotherapy liquid medicines through their respective first pipelines 25 and synchronously output them through the second pipelines 26, realizing the parallel infusion of double chemotherapy liquid medicines, which is applicable to special treatment scenarios requiring combined medication, or the same chemotherapy liquid medicine can also be used in scenarios where rapid infusion is required, such as the infusion of chemotherapy liquid medicines doxorubicin and cyclophosphamide, or the infusion of chemotherapy liquid medicines irinotecan and fluorouracil.

[0045] Embodiment Four If the drive unit 24 is symmetrically arranged, the reciprocating motion phases of the two plug rings 22 are opposite: when one infusion chamber 23 is compressed by the drive unit 24 for liquid drainage, the other infusion chamber 23 expands synchronously for liquid suction, and the two alternately complete the inhalation and discharge actions; adopting this symmetric drive mechanism eliminates the interruption of the chemotherapy liquid flow rate during the liquid suction stage of a single pump body, enables the output cycles of the two pump bodies to be complementarily superimposed, forms a continuous and stable liquid flow, effectively reduces the pulsation interference, and improves the infusion stability. The two configuration modes are flexibly adapted to the infusion requirements of different chemotherapy regimens through the differential design of the mechanical structure. It is applicable to the scenarios requiring non-pulsating and high-precision infusion, and applicable drugs: for example, if the chemotherapy liquid is fluorouracil, it needs to be continuously infused smoothly for multiple hours to maintain the blood drug concentration.

[0046] Embodiment 5 As a preferred embodiment, as Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 13 shown, the second pump body structure 3 includes two symmetrically arranged bellows 31, a third pipe 32 and a fourth pipe 33. Check valves are arranged in both the third pipe 32 and the fourth pipe 33, and both the third pipe 32 and the fourth pipe 33 are communicated with the two bellows 31; the third pipe 32 serves as the chemotherapy liquid input pipe, and the check valve in the third pipe 32 only allows the chemotherapy liquid to enter from the third pipe 32, and the fourth pipe 33 serves as the chemotherapy liquid output pipe, and the check valve in the fourth pipe 33 only allows the chemotherapy liquid to be output from the fourth pipe 33. A connector 5 is arranged on the first drive shaft 241. As Figure 3 and Figure 4 shown, an eccentric rod 51 is eccentrically arranged at one end of the connector 5 close to the second pump body structure 3. The eccentric rod 51 is fixedly installed on the connector 5, a first connecting block 52 is rotatably connected to the eccentric rod 51, and two push rods 53 are hinged to the first connecting block 52. The two push rods 53 are respectively connected to the two bellows 31. When the connector 5 rotates, one of the push rods 53 drives the bellows 31 to contract, and the other push rod 53 drives the bellows 31 to expand.

[0047] In this embodiment, the second pump body structure 3 drives the two bellows 31 to alternately contract and expand through the eccentric motion of the connector 5 to realize the basic infusion mode. When the connector 5 is in the combined state, the driving member 4 drives the first drive shaft 241 to rotate, and the eccentric rod 51 of the connector 5 rotates accordingly. The eccentric rotary motion is converted into the alternating reciprocating actions of the two push rods 53 through the first connecting block 52. The push rods 53 are respectively connected to the symmetrically arranged bellows 31. When one push rod 53 pushes the bellows 31 to contract, the liquid medicine in the corresponding bellows 31 is extruded. At this time, the check valve in the third pipe 32 closes and is output through the check valve in the fourth pipe 33.

[0048] Specifically, the third pipeline 32 includes a main liquid inlet pipeline 321, two first liquid inlet pipelines 322 and two second liquid inlet pipelines 323. One-way valves are provided in both the two first liquid inlet pipelines 322 and the two second liquid inlet pipelines 323. The two first liquid inlet pipelines 322 are communicated with one of the bellows 31, and the two second liquid inlet pipelines 323 are communicated with the other bellows 31. The fourth pipeline 33 includes a main liquid outlet pipeline 331, two first liquid outlet pipelines 332 and two second liquid outlet pipelines 333. One-way valves are provided in both the two first liquid outlet pipelines 332 and the two second liquid outlet pipelines 333. The two first liquid outlet pipelines 332 are communicated with one of the bellows 31, and the two second liquid outlet pipelines 333 are communicated with the other bellows 31.

[0049] The main liquid inlet pipeline 321 is used to connect an external chemotherapy drug storage bag as the total input channel. The two first liquid inlet pipelines 322 and the two second liquid inlet pipelines 323 are respectively connected to the liquid inlet ports of the two bellows 31, and one-way valves are provided respectively (only allowing the drug liquid to flow from the main liquid inlet pipe to the bellows 31). For the convenience of review and understanding, bellow A and bellow B are used for illustration below. When a certain bellow 31 expands (such as bellow A), the negative pressure inside bellow A increases, and the one-way valve of the first liquid inlet pipeline 322 opens. The chemotherapy drug liquid is inhaled into bellow A from the main liquid inlet pipe through the first liquid inlet pipe. The one-way valve of the second liquid inlet pipe (connected to bellow B) is closed because bellow B is in a compressed state to prevent backflow. Similarly, when the other bellow 31 expands (such as bellow B), it is symmetrically arranged, and the one-way valve of the second liquid inlet pipe opens, and the drug liquid enters bellow B.

[0050] The working process of the fourth pipeline 33 (output pipeline): The main liquid outlet pipeline 331 is connected to an infusion set as the total output channel. The first liquid outlet pipelines 332 and the second liquid outlet pipelines 333 are respectively connected to the liquid outlet ports of the two bellows 31, and one-way valves are provided respectively (only allowing the drug liquid to flow from the bellows 31 to the main liquid outlet pipe). When a certain bellow 31 is compressed (such as bellow A), the pressure inside bellow A increases, and the one-way valve of the first liquid outlet pipeline 332 opens, and the drug liquid is discharged into the main liquid outlet pipe through the first liquid outlet pipe. The one-way valve of the second liquid outlet pipe 262 (connected to bellow B) is closed because bellow B is in an expanded state to avoid output interruption. When the other bellow 31 is compressed (such as bellow B), it is symmetrically arranged, and the one-way valve of the second liquid outlet pipe 262 opens, and the drug liquid is output. The eccentric rod 51 drives the two push rods 53 to move alternately, so that the compression and expansion actions of bellow A and bellow B have a phase difference of 180°.

[0051] There is always one side of the bellows 31 in the main liquid outlet pipe in a liquid discharging state. The two bellows 31 discharge liquid alternately and seamlessly, forming a stable flow without pulsation. The alternating compression and expansion of the two bellows 31 form a continuous and stable basic infusion flow with the cooperation of the one-way valves, ensuring the continuous delivery of chemotherapy drugs. The cooperation between the rotation phase of the eccentric rod 51 and the stroke of the push rod 53 further optimizes the coordination of the actions of the bellows 31, thereby realizing an efficient and stable basic infusion function.

[0052] In this embodiment, when the second pump body structure 3 and the first pump body structure 2 cooperate, the bladder 31 of the second pump body structure 3 is suitable for the stable infusion of chemotherapeutic drugs such as calcium folinate. The chemotherapeutic drugs in the first pump body structure 2 can adopt a pulsed infusion mode in cooperation with 5-FU and / or oxaliplatin. The full name of 5-FU is 5-fluorouracil (English: Fluorouracil), which is a classic antimetabolic chemotherapeutic drug widely used in the treatment of various solid tumors, such as colorectal cancer, gastric cancer, breast cancer, etc. Its mechanism of action is to inhibit thymidylate synthase, interfere with the synthesis of DNA and RNA, and thus inhibit the proliferation of tumor cells. Through the second pump body structure 3 and the first pump body structure 2, the chemotherapeutic drug infused by the second pump body structure 3 is calcium folinate. The purpose of combining the second pump body structure 3 with the first pump body structure 2 is to enhance the anti-tumor effect of 5-FU and improve the anti-cancer effect of chemotherapy.

[0053] Example Six As a preferred embodiment, as Figure 14 and Figure 15 shown, the connector 5 includes a first seat body 54, a second seat body 55 and a pull rod 56. The first seat body 54 is fixedly connected to the first drive shaft 241. A pin 57 and a slip ring 58 are arranged on the first seat body 54. The slip ring 58 is slidably connected to the first seat body 54 through the pin 57. A first engaging tooth 591 is arranged on one side of the slip ring 58 close to the second seat body 55, and a second engaging tooth 592 is arranged on one side of the second seat body 55 close to the slip ring 58. One end of the pull rod 56 is fixedly connected to the slip ring 58, and the other end of the pull rod 56 is fixedly connected to the lever 282.

[0054] In this embodiment, the connector 5 realizes the power transmission and start-stop control of the second pump body structure 3 through mechanical engagement. When the lever 282 is operated, as Figure 2 and Figure 3 shown, when the lever 282 is pushed to the left, it can not only realize the pulsed infusion of the first pump body structure 2, but also drive the pull rod 56 connected to the lever 282 to move to the left, as Figure 14 and Figure 15As shown in the figure, the slip ring 58 is then driven to slide axially leftward along the bolt 57, causing the first engaging tooth 591 on the slip ring 58 to engage with the second engaging tooth 592 on the second housing 55. At this time, the rotational power of the first drive shaft 241 is transmitted to the eccentric rod 51 through the connector 5. When the eccentric rod 51 rotates with the drive shaft, the two push rods 53 are alternately pushed and pulled by the first connecting block 52 to symmetrically push and pull the bellows 31, causing one bellows 31 to contract and extrude the liquid medicine and the other bellows 31 to expand and suck in the liquid medicine, and the one-way valves of the third pipe 32 and the fourth pipe 33 are coordinated to achieve continuous liquid supply for basic infusion. When the lever 282 moves to the right, the pulsed infusion of the first pump body structure 2 becomes a steady infusion. At the same time, the slip ring 58 slides in the reverse direction to separate the engaging teeth, and the first pump body structure 2 stops working, only retaining the steady infusion of the first pump body. This mechanical meshing design can achieve flexible switching between the coordinated or independent operation of the double pump bodies through the simple operation of the lever 282.

[0055] Embodiment Seven As Figure 16 shown in the figure, the connector 5 includes a first housing 54, a second housing 55 and a pull rod 56. The first housing 54 is fixedly connected to the first drive shaft 241. A bolt 57 and a slip ring 58 are provided on the first housing 54. The slip ring 58 is slidably connected to the first housing 54 through the bolt 57. A screw 60 is fixedly provided on the slip ring 58. The right end of the screw 60 penetrates the first housing 54 and is connected to a nut 61. A spring 62 is provided between the nut 61 and the first housing 54. The spring 62 has a tendency to drive the slip ring 58 away from the second housing 55 (that is, Figure 16 in the figure, the slip ring 58 has a tendency to move to the right); a first engaging tooth 591 is provided on the side of the slip ring 58 close to the second housing 55, and a second engaging tooth 592 is provided on the side of the second housing 55 close to the slip ring 58. The bottom end of the pull rod 56 is fixedly connected to the slip ring 58, and the top end of the pull rod 56 is fixedly connected to the lever 282; an electromagnet 63 is provided inside the second housing 55. When the electromagnet 63 is not powered on, the first engaging tooth 591 and the second engaging tooth 592 are misaligned with each other and are not connected. A heating coil 64 is sleeved on the outer periphery of the pump housing 21. Both the electromagnet 63 and the heating coil 64 are connected to a power source.

[0056] In this embodiment, the nursing infusion device realizes the power coupling and separation of the second pump body structure 3 through electromagnetic control. When the electromagnet 63 is energized, the magnetic suction force generated by it overcomes the resistance of the spring 62, attracting the slip ring 58 to slide towards the second seat body 55, so that the first meshing tooth 591 meshes with the second meshing tooth 592. At this time, the rotational power of the first drive shaft 241 is transmitted to the eccentric rod 51 through the connector 5, driving the two push rods 53 to alternately compress the rubber bag 31 to achieve the basic infusion mode. At the same time, when the slip ring 58 moves, it will also drive the pull rod 56 and the shift lever 282 to move, and then the shift lever 282 drives the first pump body structure 2 to switch between pulse infusion and steady infusion. When the electromagnet 63 is powered on, it will also drive the heating coil 64 to be energized to heat the pump housing 21 and the liquid medicine to prevent drug crystallization, which is applicable to the temperature-sensitive albumin-bound paclitaxel chemotherapy liquid medicine, and heating is used to prevent crystallization. When it is necessary to switch the mode, the electromagnet 63 is powered off, the magnetic suction force disappears, the spring 62 pushes the slip ring 58 to reset and disengage, and the first pump body stops working. At this time, only the second pump body performs steady infusion. The combination of electromagnetic control and mechanical dial control realizes the rapid response and reliable switching of the power transmission of the double pump body, and at the same time, the temperature control function ensures the safety of the liquid medicine infusion.

[0057] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. A nursing infusion device for tumor chemotherapy, characterized in that, Comprising: A housing (1), a first pump body structure (2) and a second pump body structure (3) fixedly arranged within the housing (1); The first pump body structure (2) includes at least one pump body assembly, the pump body assembly includes a pump housing (21) and a plug ring (22) slidably arranged within the pump housing (21), an infusion cavity (23) is formed within the pump housing (21), a driving unit (24) for driving the sliding of the plug ring (22) is arranged at the bottom of the infusion cavity (23), the driving unit (24) is used to drive the air pressure within the infusion cavity (23) to increase or decrease; a first pipeline (25) and a second pipeline (26) communicating with the infusion cavity (23) are arranged on the pump housing (21), check valves are arranged on both the first pipeline (25) and the second pipeline (26), a pulse adjusting member (27) is arranged on the second pipeline (26), and the pulse adjusting member (27) can drive the second pipeline (26) to open or close; At least one adjusting assembly (28) is arranged on one side of the pump housing (21), and the adjusting assembly (28) is connected to the pulse adjusting member (27); It further includes a driving member (4), the driving member (4) is connected to the driving unit (24), and the driving member (4) can be connected to or disconnected from the adjusting assembly (28) and the second pump body structure (3) simultaneously.

2. The nursing infusion device for tumor chemotherapy according to claim 1, wherein: The driving unit (24) includes a first driving shaft (241), a first eccentric block (242) and a first connecting rod (243), the first eccentric block (242) is fixedly arranged on the first driving shaft (241), one end of the first connecting rod (243) is movably connected to the first eccentric block (242), the other end of the first connecting rod (243) is movably connected to the plug ring (22), and a driving gear (244) is mounted on the first driving shaft (241).

3. The nursing infusion device for tumor chemotherapy according to claim 2, characterized in that: The adjusting assembly (28) includes a second driving shaft (281), a lever (282) and a swinging member (283), the lever (282) is slidably arranged on one side of the housing (1), the swinging member (283) is arranged between the second driving shaft (281) and the lever (282), the swinging member (283) has a first state of driving the second pipeline (26) to open and a second state of closing the second pipeline (26), and the second driving shaft (281) is used to drive the swinging member (283) to switch between the first state and the second state; A driven gear (284) is coaxially mounted on the second driving shaft (281), and the driven gear (284) meshes with the driving gear (244).

4. The nursing infusion device for tumor chemotherapy according to claim 3, characterized in that: The swinging member (283) includes a swing arm (2831) rotatably sleeved on the lever (282), the swing arm (2831) has a first end and a second end, a driving rod (2832) is hinged to the second end of the swing arm (2831), and a counterweight (2833) is fixedly arranged at the bottom of the driving rod (2832); A cam (2834) is coaxially connected to the second driving shaft (281); The shift lever (282) can drive the swing arm (2831), the drive rod (2832) and the counterweight (2833) to move. When the counterweight (2833) contacts the cam (2834), the cam (2834) is used to drive the counterweight (2833) to move up and down, and the counterweight (2833) drives the swing arm (2831) to rotate around the shift lever (282) through the drive rod (2832).

5. The nursing infusion device for tumor chemotherapy according to claim 4, characterized in that: The second pipeline (26) includes a first liquid outlet pipe (261) and a second liquid outlet pipe (262), and the pulse adjusting member (27) is arranged between the first liquid outlet pipe (261) and the second liquid outlet pipe (262); The pulse adjusting member (27) includes a pulse housing (271) fixedly arranged on the top of the housing (1). A liquid channel (272) is arranged in the pulse housing (271). The liquid channel (272) is communicated with the first liquid outlet pipe (261) and the second liquid outlet pipe (262). A block (273) is slidably arranged in the pulse housing (271). A blocking member (274) is fixedly arranged on the block (273). A tension spring (275) is arranged in the pulse housing (271), and the tension spring (275) has a tendency to drive the blocking member (274) away from the liquid channel (272); A connecting portion (276) is arranged on the block (273), and a connecting rope (277) is connected to the connecting portion (276). The connecting rope (277) is connected to the first end of the swing arm (2831).

6. The nursing infusion device for tumor chemotherapy according to claim 5, characterized in that: The number of the pump body assemblies is two, and the drive units (24) arranged in the two pump body assemblies are arranged in the same or symmetric manner.

7. The nursing infusion device for tumor chemotherapy according to claim 4, characterized in that: The second pump body structure (3) includes two symmetrically arranged bellows (31), a third pipeline (32) and a fourth pipeline (33). Check valves are arranged in both the third pipeline (32) and the fourth pipeline (33), and both the third pipeline (32) and the fourth pipeline (33) are communicated with the two bellows (31); A connector (5) is arranged on the first drive shaft (241). An eccentric rod (51) is eccentrically arranged at one end of the connector (5) close to the second pump body structure (3). A first connecting block (52) is rotatably connected to the eccentric rod (51). Two push rods (53) are hinged to the first connecting block (52). The two push rods (53) are respectively connected to the two bellows (31). When the connector (5) rotates, one of the push rods (53) drives the bellows (31) to contract, and the other push rod (53) drives the bellows (31) to expand.

8. The nursing infusion device for tumor chemotherapy according to claim 7, characterized in that: The connector (5) includes a first housing (54), a second housing (55) and a pull rod (56). The first housing (54) is fixedly connected to the first drive shaft (241). An insertion pin (57) and a slip ring (58) are provided on the first housing (54). The slip ring (58) is slidably connected to the first housing (54) through the insertion pin (57). A first engaging tooth (591) is provided on one side of the slip ring (58) close to the second housing (55). A second engaging tooth (592) is provided on one side of the second housing (55) close to the slip ring (58). One end of the pull rod (56) is fixedly connected to the slip ring (58), and the other end of the pull rod (56) is fixedly connected to the shift lever (282).

9. The nursing infusion device for tumor chemotherapy according to claim 7, wherein: The connector (5) includes a first housing (54), a second housing (55) and a pull rod (56). The first housing (54) is fixedly connected to the first drive shaft (241). An insertion pin (57) and a slip ring (58) are provided on the first housing (54). The slip ring (58) is slidably connected to the first housing (54) through the insertion pin (57). A screw (60) is fixedly provided on the slip ring (58). The end of the screw (60) passes through the first housing (54) and is connected with a nut (61). A spring (62) is provided between the nut (61) and the first housing (54). The spring (62) has a tendency to drive the slip ring (58) away from the second housing (55); A first engaging tooth (591) is provided on one side of the slip ring (58) close to the second housing (55). A second engaging tooth (592) is provided on one side of the second housing (55) close to the slip ring (58). One end of the pull rod (56) is fixedly connected to the slip ring (58), and the other end of the pull rod (56) is fixedly connected to the shift lever (282); An electromagnet (63) is provided inside the second housing (55). A heating coil (64) is sleeved on the outer periphery of the pump housing (21). The electromagnet (63) and the heating coil (64) are both connected to a power supply.

10. The nursing infusion device for tumor chemotherapy according to any one of claims 1 to 9, characterized in that: The driving member (4) is a motor. The motor is provided on one side of the housing (1). The output shaft of the motor is coaxially connected to the driving gear (244).

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