Infusion pump with bubble detection function

Abstract

The invention discloses an infusion pump with a bubble detection function, and belongs to the field of infusion devices.The infusion pump comprises a shell, connecting mechanisms are arranged on the two sides of the shell, the shell is installed on an external infusion rod through the connecting mechanisms, the interior of the shell is hollow, an arc-shaped seat is fixedly installed on one side of the shell, and the infusion pump further comprises a penetrating opening and a notch; the upper end and the lower end of the arc-shaped base are each provided with an ultrasonic bubble sensor embedded into the arc-shaped base, a microcomputer system controller is installed on the shell and used for controlling the ultrasonic bubble sensors to work, and a peristaltic pump mechanism is arranged in the notch. The ultrasonic bubble sensors are embedded into the upper end and the lower end of the arc-shaped base, a surrounding type detection area for the infusion hose is formed, planar scanning is conducted on a medium in the hose, and misjudgment caused by the uneven surface of the hose or liquid medicine residues is reduced. The contact surface of the sensor and the hose is expanded from a point to an arc-shaped area, so that the influence of local wrinkles or particles on signals is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of infusion devices, and particularly relates to an infusion pump with bubble detection. BACKGROUND

[0002] The infusion pump is an intelligent medical device capable of accurately controlling the infusion speed and drug amount, and through mechanical or electronic means acting on the infusion catheter, the liquid is uniformly and accurately infused. Its core components include a microcomputer system, a finger peristaltic pump (which uses a roller to extrude the infusion tube to generate peristaltic propulsion of the liquid) and a multi-sensor monitoring device (such as an ultrasonic bubble sensor and a pressure sensor), which can detect bubbles, blockages and infusion completion in real time and trigger sound and light alarms. It is widely used in clinical settings such as pressurized drugs, antiarrhythmic drugs, infant infusion and intravenous anesthesia. The built-in battery ensures continuous operation after power failure, significantly improving drug safety and nursing efficiency.

[0003] In the prior art, the sensor monitoring structure of the infusion pump is in contact with the infusion hose for bubble detection, but the contact position between the sensor contact and the infusion hose is concentrated in one point, and the contact point may generate false signals due to uneven surface of the hose, residual liquid or mechanical vibration. For example, slight wrinkles in the hose or small particles in the liquid may be misjudged as bubbles, triggering frequent alarms and interfering with the normal infusion process. To solve the above problems, we propose an infusion pump with bubble detection. SUMMARY

[0004] The purpose of the present application is to solve the problem that in the prior art, the contact position between the sensor contact of the infusion pump and the infusion hose is concentrated in one point, and the contact point may generate false signals due to uneven surface of the hose, residual liquid or mechanical vibration. Therefore, an infusion pump with bubble detection is proposed.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] An infusion pump with bubble detection, comprising a shell, the two sides of the shell are provided with connecting mechanisms, the shell is installed on the external infusion rod through the connecting mechanisms, the shell is hollow inside, one side of the shell is fixedly provided with an arc-shaped seat, further comprising a through hole and a notch, the through hole is arranged in the arc-shaped seat, the arc-shaped seat is used for placing the infusion hose, the notch is arranged on the shell, the through hole and the notch are in communication with each other, one side of the shell is provided with a fixing mechanism, the fixing mechanism is used for fixing the infusion hose placed on the arc-shaped seat, ultrasonic bubble sensors are arranged at the upper and lower ends of the arc-shaped seat and embedded in the arc-shaped seat, a microcomputer system controller is arranged on the shell, the microcomputer system controller is used for controlling the work of the ultrasonic bubble sensors, a peristaltic pump mechanism is arranged in the notch, and the peristaltic pump mechanism is used for conveying the liquid in the infusion hose.

[0007] Preferably, a display is fixedly installed on the shell, and the display is electrically connected with the ultrasonic bubble sensor and the microcomputer system controller, and the display displays the parameters of the ultrasonic bubble sensor and the microcomputer system controller and the current working state information.

[0008] Preferably, the connecting mechanism comprises a side seat fixedly installed on the side of the shell, an arc-shaped mounting groove is formed in the side seat, a first pressing plate is arranged on one side of the side seat, the first pressing plate is arc-shaped, two spaced-apart guide rods are arranged through the first pressing plate, the other ends of the guide rods are fixedly connected to the side seat, a screw rod is rotatably installed on the side seat, the screw rod penetrates through the side seat and is threadedly connected with the side seat, and a handle is fixedly installed on the end of the screw rod.

[0009] Preferably, the peristaltic pump mechanism comprises a rotating disc arranged in the notch, a plurality of first protrusions arranged in a circumferential array are arranged on the outer side of the rotating disc, the first protrusion on one side penetrates to the through hole, a servo motor is arranged in the notch, the servo motor is fixedly installed on the shell, and the output shaft of the servo motor is fixedly connected to the center of the rotating disc.

[0010] Preferably, the peristaltic pump mechanism further comprises a circular port formed in one side of the rotating disc, a plurality of movable rods arranged in a circumferential array are arranged in the circular port, the movable rods penetrate through the rotating disc and are inserted into the first protrusions at one end, the movable rods are flush with the end faces of the first protrusions, the movable rods are slidably installed on the rotating disc, a plurality of blocks are fixedly installed in the circular port, the movable rods penetrate through the blocks, respectively, elastic members are fixedly connected between one end of the movable rods and the blocks, a stepping motor is arranged in the notch, an inner disc body is fixedly installed at the end of the output shaft of the stepping motor, the inner disc body is located in the circular port, a plurality of second protrusions arranged in a circumferential array are integrally formed on the outer side of the inner disc body, and the second protrusions are in contact with one end of the movable rods in the rotating process.

[0011] Preferably, the surfaces of the first protrusions and the second protrusions are polished.

[0012] Preferably, the servo motor and the stepping motor are electrically connected to the microcomputer system controller, and the microcomputer system controller is used to control the servo motor and the stepping motor to work.

[0013] Preferably, the fixing mechanism comprises two spaced-apart limiting sheets, the limiting sheets are arranged on the two sides of the arc-shaped seat, the limiting sheets are used to limit the two sides of the infusion tube on the arc-shaped seat, two spring telescopic rods arranged in an up-down manner are fixedly installed on the two sides of the shell, and the movable ends of the spring telescopic rods are fixedly connected to the limiting sheets.

[0014] Preferably, the fixing mechanism further comprises a second pressing plate arranged on the front side of the arc-shaped seat, four elastic strips are fixedly connected between the second pressing plate and the shell, a rotating shaft is rotatably arranged on the shell, a cam is fixedly arranged on the rotating shaft, the cam is in contact with the second pressing plate and can drive the second pressing plate to move towards the arc-shaped seat, conveying rollers are arranged at the upper and lower ends of the arc-shaped seat, a motor is fixedly arranged on the shell, and the output shaft of the motor is fixedly connected with the conveying rollers, and a synchronous belt mechanism is arranged between the drive shaft of the conveying rollers and the rotating shaft.

[0015] Preferably, a protective cover is fixedly arranged on the shell, and clamping blocks are arranged at the four corners of the protective cover and fixedly connected with the shell.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. By embedding ultrasonic bubble sensors at the upper and lower ends of the arc-shaped seat, a surrounding detection area for the infusion tube is formed. The sensors perform surface scanning on the medium in the tube by taking advantage of the difference in ultrasonic wave propagation between liquid and gas, i.e. the sound speed decreases and the attenuation increases in gas, thereby reducing the false judgment caused by uneven tube surface or residual liquid. The contact surface of the sensors and the tube expands from a point to an arc-shaped area, thereby reducing the influence of local wrinkles or particles on the signal.

[0018] 2. The second protruding part drives the movable rod to move, one end of the movable rod moves towards the infusion tube and intermittently extrudes the infusion tube, thereby cooperating with the second pressing plate to crush the bubbles in the infusion tube. By actively crushing the bubbles through mechanical structure, the infusion process can be restored without manual intervention, thereby significantly improving the reliability of continuous infusion. The second pressing plate and the movable rod form a clamping device for opposite extrusion, the bubbles are limited in a fixed area, and the bubbles are prevented from slipping or deforming but not breaking due to unilateral extrusion. The surface of the second pressing plate is designed in a corrugated or pointed structure, thereby further increasing the local pressure and ensuring that the small bubbles can also be effectively crushed.

[0019] 3. The spring telescopic rod provides bidirectional elastic support force, pushes the limiting piece to limit the two sides of the infusion tube, and effectively limits the horizontal displacement of the tube when the peristaltic pump mechanism transports liquid or crushes bubbles, thereby preventing the tube from sliding out of the arc-shaped seat due to mechanical vibration and ensuring the stability and safety of the infusion process. The tension of the elastic strips keeps a gap between the second pressing plate and the arc-shaped seat, thereby facilitating the installation of the tube; when the long diameter end of the cam contacts the second pressing plate, the elastic tension of the elastic strips can be overcome to push the pressing plate to press the tube tightly, thereby forming a vertical closed clamping. This design facilitates the installation of the tube and can flexibly realize the clamping and loosening of the tube as needed. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structure diagram of an infusion pump with bubble detection is provided. Figure 1 ;

[0021] Figure 2 Structure diagram of infusion pump with bubble detection Figure 2 ;

[0022] Figure 3 Structure diagram of infusion pump with bubble detection

[0023] Figure 4 Structure diagram of infusion pump with bubble detection

[0024] Figure 5 Structure diagram of infusion pump with bubble detection

[0025] Figure 6 Structure diagram of infusion pump with bubble detection

[0026] Figure 7 Structure diagram of infusion pump with bubble detection

[0027] In the figure: 1, housing; 2, connecting mechanism; 3, through hole; 4, arc-shaped seat; 5, notch; 6, fixing mechanism; 7, ultrasonic bubble sensor; 8, microcomputer system controller; 9, display; 10, side seat; 11, first pressing plate; 12, guide rod; 13, screw rod; 14, rotating disc; 15, first protruding part; 16, servo motor; 17, circular port; 18, movable rod; 19, block; 20, elastic member; 21, stepping motor; 22, inner disc body; 23, second protruding part; 24, limiting sheet; 25, spring telescopic rod; 26, second pressing plate; 27, elastic strip; 28, rotating shaft; 29, cam; 30, conveying roller; 31, motor; 32, synchronous belt mechanism; 33, protective cover; 34, clamping block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Embodiment, refer to Figures 1 to 7 A infusion pump with bubble detection, comprising a shell 1, both sides of the shell 1 are provided with connecting mechanisms 2, the shell 1 is installed on the external infusion rod through the connecting mechanisms 2, the shell 1 is hollow inside, one side of the shell 1 is fixedly installed with an arc-shaped seat 4, further comprising a through hole 3 and a notch 5, the through hole 3 is opened in the arc-shaped seat 4, the arc-shaped seat 4 is used for placing an infusion hose, the notch 5 is opened on the shell 1, the through hole 3 and the notch 5 are in communication with each other, one side of the shell 1 is provided with a fixing mechanism 6, the fixing mechanism 6 is used for fixing the infusion hose placed on the arc-shaped seat 4, both ends of the arc-shaped seat 4 are installed with ultrasonic bubble sensors 7 embedded in the inside of the arc-shaped seat 4, a microcomputer system controller 8 is installed on the shell 1, the microcomputer system controller 8 is used for controlling the work of the ultrasonic bubble sensors 7, a peristaltic pump mechanism is arranged in the notch 5, the peristaltic pump mechanism is used for conveying the liquid in the infusion hose.

[0032] A display 9 is fixedly installed on the shell 1, the display 9 is electrically connected with the ultrasonic bubble sensors 7 and the microcomputer system controller 8, the display 9 displays the parameters and the current working state information of the ultrasonic bubble sensors 7 and the microcomputer system controller 8.

[0033] The connecting mechanism 2 comprises a side seat 10 fixedly installed on the side of the shell 1, an arc-shaped installation groove is formed in the side seat 10, a first pressing plate 11 is arranged on one side of the side seat 10, the first pressing plate 11 is arranged in an arc shape, two spaced-apart guide rods 12 are penetrated through the first pressing plate 11, one end of the guide rods 12 is fixedly connected to the side seat 10, a screw rod 13 is rotatably installed on the side seat 10, the screw rod 13 penetrates through the first pressing plate 11 and is threadedly connected with the first pressing plate 11, a handle is fixedly installed at the end of the screw rod 13. The external infusion rod is penetrated through the first pressing plate 11 and the side seat 10, the first pressing plate 11 is driven to move towards the external infusion rod by rotating the screw rod 13, and the external infusion rod is pressed by the side seat 10, so that the device can be fixed on the external infusion rod.

[0034] The peristaltic pump mechanism comprises a rotating disc 14 arranged in the recess 5, a plurality of first protruding portions 15 arranged in a circumferential array are arranged on the outer side of the rotating disc 14, the first protruding portion 15 on one side penetrates the through hole 3, a servo motor 16 is arranged in the recess 5, the servo motor 16 is fixedly installed on the shell 1, and the output shaft of the servo motor 16 is fixedly connected with the center of the rotating disc 14. The peristaltic pump mechanism further comprises a circular port 17 formed in one side of the rotating disc 14, a plurality of movable rods 18 arranged in a circumferential array are arranged in the circular port 17, the movable rods 18 penetrate the rotating disc 14 and one end of each movable rod 18 is inserted into the first protruding portion 15, the movable rods 18 are flush with the end face of the first protruding portion 15, the movable rods 18 are slidably installed on the rotating disc 14, a plurality of block bodies 19 are fixedly installed in the circular port 17, the movable rods 18 penetrate the block bodies 19 respectively, and an elastic member 20 is fixedly connected between one end of the movable rod 18 and the block body 19. A stepping motor 21 is arranged in the recess 5, an inner disc body 22 is fixedly installed at the output shaft end of the stepping motor 21, the inner disc body 22 is located in the circular port 17, a plurality of second protruding portions 23 arranged in a circumferential array are integrally formed on the outer side of the inner disc body 22, and the second protruding portions 23 are in contact with one end of the movable rods 18 in the rotating process. The surfaces of the first protruding portions 15 and the second protruding portions 23 are polished, the surfaces of the first protruding portions 15, the peristaltic pump rollers and the second protruding portions 23 and the inner disc driving portion are polished, micro-vibration caused by friction with the hose is reduced, and the sensor 7 is prevented from being triggered by mistake. The servo motor 16 and the stepping motor 21 are electrically connected to the microcomputer system controller 8, and the microcomputer system controller 8 is used for controlling the servo motor 16 and the stepping motor 21 to work.

[0035] Working principle: The infusion hose is placed on the arc-shaped seat 4 and fixed by the fixing mechanism 6. The ultrasonic bubble sensor 7 is embedded in the upper and lower ends of the arc-shaped seat 4, forming a surrounding detection area for the infusion hose. The sensor performs surface scanning on the medium in the hose through the difference in ultrasonic propagation between liquid and gas, that is, the sound speed is reduced and the attenuation is enhanced in gas, thereby reducing the misjudgment caused by uneven surface of the hose or residual liquid. The contact surface of the sensor 7 and the hose is expanded from a point to an arc-shaped area, thereby reducing the influence of local wrinkles or particles on the signal.

[0036] Liquid delivery principle: the rotating disc 14 is driven by the servo motor 16: the servo motor 16 drives the rotating disc 14 to rotate, the first protruding part 15 on the outer side of the rotating disc 14 periodically extrudes the soft tube, forming a one-way pumping action. The microcomputer system controller 8 adjusts the rotating speed of the servo motor 16 in real time according to the infusion parameters flow rate and pressure, ensuring stable liquid delivery and avoiding excessive deformation of the soft tube.

[0037] The ultrasonic bubble sensor 7 transmits a detection signal to the microcomputer system controller 8, and the controller analyzes the signal characteristics such as amplitude attenuation and frequency change through an algorithm to distinguish bubbles from normal liquid. When the difference between the signals of the two sensors 7 exceeds the threshold value, the controller 8 determines that it is an interference signal and does not trigger an alarm; only when both of them detect an abnormality at the same time, it is determined to be a bubble. After detecting a bubble, the controller 8 immediately suspends the servo motor 16 and the stepping motor 21, and displays alarm information such as bubble position and size on the display 9, and can also link to external devices such as nurse station terminals to notify medical staff. The display 9 displays the infusion parameters flow rate, remaining amount and device state motor speed, sensor signal strength in real time, supports historical data query and fault tracing.

[0038] Further, the fixing mechanism 6 includes two limiting pieces 24 arranged at intervals, the limiting pieces 24 are arranged on both sides of the arc-shaped seat 4, the limiting pieces 24 are used for limiting the two sides of the infusion soft tube on the arc-shaped seat 4, two spring telescopic rods 25 arranged at intervals are fixedly installed on both sides of the shell 1, and the movable ends of the spring telescopic rods 25 are all fixedly connected to the limiting pieces 24.

[0039] The fixing mechanism 6 further includes a second pressing plate 26 arranged on the front side of the arc-shaped seat 4, four elastic strips 27 are fixedly connected between the second pressing plate 26 and the shell 1, a rotating shaft 28 is rotatably installed on the shell 1, a cam 29 is fixedly installed on the rotating shaft 28, the cam 29 is in contact with the second pressing plate 26 and can drive the second pressing plate 26 to move towards the arc-shaped seat 4, conveying rollers 30 are arranged at the upper and lower ends of the arc-shaped seat 4, a motor 31 is fixedly installed on the shell 1, the output shaft of the motor 31 is fixedly connected with the conveying rollers 30, and a synchronous belt mechanism 32 is installed between the driving shaft of the conveying rollers 30 and the rotating shaft 28. A protective cover 33 is fixedly installed on the shell 1, clamping blocks 34 are arranged at the four corners of the protective cover 33, and the clamping blocks 34 are fixedly connected to the shell 1. The protective cover 33 covers the outside of the fixing mechanism 6, and the four corners are clamped and fixed with the shell 1 through the clamping blocks 34.

[0040] When bubbles are detected, the microcomputer system controller 8 controls the servo motor 16 to work, and the microcomputer system controller 8 controls the stepper motor 21 to drive the inner disk 22 to rotate, and the second protrusion 23 drives the movable rod 18 to move. One end of the movable rod 18 moves toward the infusion hose and intermittently squeezes the infusion hose, thereby cooperating with the second pressure plate 26 to squeeze and burst the bubbles in the infusion hose. By actively squeezing the bubbles through the mechanical structure, the infusion process can be restored without human intervention. It is particularly suitable for unattended scenarios (such as night care, home infusion), and significantly improves the reliability of continuous infusion. The second pressure plate 26 and the movable rod 18 form a counter-extrusion clamp, and the bubbles are confined to a fixed area to avoid the bubbles slipping or deforming but not breaking due to unilateral squeezing. The surface of the second pressure plate 26 can be designed as a corrugated or pointed structure to further increase the local pressure and ensure that tiny bubbles can also be effectively squeezed.

[0041] At the moment of bursting a bubble, servo motor 16 briefly reduces the speed of turntable 14, reducing turbulence within the hose and preventing the generation of new bubbles or aerosols during the bursting process. After the burst, microcomputer system controller 8 immediately restores the preset parameters of servo motor 16 and stepper motor 21, ensuring that the infusion flow rate and pressure quickly return to a stable state.

[0042] The spring-loaded telescopic rods 25, arranged in two groups of four, provide bidirectional elastic support. When the infusion hose is placed in the curved seat 4, the elastic force of the spring-loaded telescopic rods 25 pushes the stoppers 24 against the sidewalls of the hose, securing the hose in place. When the peristaltic pump mechanism delivers liquid or bursts air bubbles, the stoppers 24 limit horizontal movement of the hose, preventing it from slipping out of the curved seat 4 due to mechanical vibration.

[0043] The tension of the elastic strip 27 maintains a gap between the second pressure plate 26 and the curved seat 4, facilitating the insertion of the hose. A motor 31, via a timing belt mechanism 32, drives the rotating shaft 28, which in turn rotates the cam 29. When the long-diameter end of the cam 29 contacts the second pressure plate 26, it overcomes the tension of the elastic strip 27, pushing the pressure plate 26 forward and compressing the hose, creating a vertically closed clamp.

[0044] When the hose is installed, the conveyor rollers 30 use friction to press the hose into the opening 3 of the curved seat 4, assisting the stopper 24 in initial positioning. During the bubble-bursting process, the rollers 30 continue to clamp the hose, preventing it from partially tilting due to compression from the second pressure plate 26. Simultaneously, the motor 31 drives the rollers 30. The synchronized rotation of the upper and lower rollers 30 drives the hose to the desired position, allowing for adjustment of the hose's installation position.

[0045] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An infusion pump with bubble detection, comprising a housing (1), characterized in that: Both sides of the shell (1) are provided with connecting mechanisms (2), and the shell (1) is installed on the external infusion rod through the connecting mechanisms (2). The interior of the shell (1) is hollow, and an arc-shaped seat (4) is fixedly installed on one side of the shell (1), and further includes a through-hole (3) and a notch (5). The through-hole (3) is provided on the arc-shaped seat (4), and the arc-shaped seat (4) is used to place the infusion hose. The notch (5) is provided on the shell (1), and the through-hole (3) and the notch (5) are communicated with each other. The shell ( 1) A fixing mechanism (6) is provided on one side, and the fixing mechanism (6) is used to fix the infusion hose placed on the arc seat (4). Ultrasonic bubble sensors (7) embedded in the arc seat (4) are installed at both the upper and lower ends of the arc seat (4). A microcomputer system controller (8) is installed on the housing (1), and the microcomputer system controller (8) is used to control the operation of the ultrasonic bubble sensor (7). A peristaltic pump mechanism is provided in the recess (5), and the peristaltic pump mechanism is used to transport the liquid in the infusion hose.

2. The infusion pump with bubble detection according to claim 1, characterized in that: A display (9) is fixedly mounted on the housing (1), and the display (9) is electrically connected to the ultrasonic bubble sensor (7) and the microcomputer system controller (8). The display (9) displays parameters of the ultrasonic bubble sensor (7) and the microcomputer system controller (8) and current working status information.

3. The infusion pump with bubble detection according to claim 1, characterized in that: The connecting mechanism (2) includes a side seat (10), the side seat (10) is fixedly installed on the side of the shell (1), an arc-shaped installation groove is opened on the side seat (10), a first pressure plate (11) is provided on one side of the side seat (10), the first pressure plate (11) is arranged in an arc shape, two guide rods (12) arranged at intervals are passed through the first pressure plate (11), the other end of the guide rod (12) is fixedly connected to the side seat (10), a screw rod (13) is rotatably installed on the side seat (10), the screw rod (13) passes through the first pressure plate (11) and is threadedly connected to the first pressure plate (11), and a handle is fixedly installed at the end of the screw rod (13).

4. The infusion pump with bubble detection according to claim 1, characterized in that: The peristaltic pump mechanism includes a turntable (14), which is arranged inside the recess (5). A plurality of first protrusions (15) distributed in a circumferential array are arranged on the outside of the turntable (14), and the first protrusions (15) located on one side penetrate the through-opening (3). A servo motor (16) is arranged in the recess (5), and the servo motor (16) is fixedly mounted on the housing (1). The output shaft of the servo motor (16) is fixedly connected to the center of the turntable (14).

5. The infusion pump with bubble detection according to claim 4, characterized in that: The peristaltic pump mechanism further comprises a circular opening (17) opened on one side of the turntable (14), wherein a plurality of movable rods (18) distributed in a circular array are provided in the circular opening (17), wherein the movable rods (18) pass through the turntable (14) and one end of the movable rods (18) is inserted into the first protrusion (15), wherein the movable rods (18) are flush with the end surface of the first protrusion (15), wherein the movable rods (18) are slidably mounted on the turntable (14), wherein a plurality of blocks (19) are fixedly mounted in the circular opening (17), wherein the movable rods (18) are respectively The block (19) is penetrated, and an elastic member (20) is fixedly connected between one end of the movable rod (18) and the block (19). A stepper motor (21) is provided in the recess (5), and an inner disk (22) is fixedly installed on the output shaft end of the stepper motor (21). The inner disk (22) is located inside the circular opening (17), and a plurality of second protrusions (23) distributed in a circumferential array are integrally formed on the outer side of the inner disk (22). The second protrusions (23) contact one end of the movable rod (18) during the rotation process.

6. The infusion pump with bubble detection according to claim 5, characterized in that: The surfaces of the first raised portion (15) and the second raised portion (23) are both polished.

7. The infusion pump with bubble detection according to claim 6, characterized in that: The servo motor (16) and the stepper motor (21) are both electrically connected to a microcomputer system controller (8), and the microcomputer system controller (8) is used to control the operation of the servo motor (16) and the stepper motor (21).

8. The infusion pump with bubble detection according to claim 1, characterized in that: The fixing mechanism (6) comprises two spaced apart limiting plates (24), the spaced apart plates (24) being arranged on both sides of the arc seat (4), the spaced apart plates (24) being used to limit the two sides of the infusion hose on the arc seat (4), and two spring telescopic rods (25) spaced apart from each other are fixedly mounted on both sides of the housing (1), the movable ends of the spring telescopic rods (25) being fixedly connected to the spaced apart plates (24).

9. The infusion pump with bubble detection according to claim 8, characterized in that: The fixing mechanism (6) further comprises a second pressing plate (26) arranged at the front side of the arc seat (4), four elastic strips (27) are fixedly connected between the second pressing plate (26) and the shell (1), a rotating shaft (28) is rotatably mounted on the shell (1), a cam (29) is fixedly mounted on the rotating shaft (28), the cam (29) contacts the second pressing plate (26) and can drive the second pressing plate (26) to move toward the arc seat (4), a conveying roller (30) is provided at both the upper and lower ends of the arc seat (4), a motor (31) is fixedly mounted on the shell (1), an output shaft of the motor (31) is fixedly connected to the conveying roller (30), and a synchronous belt mechanism (32) is installed between the driving shaft of the conveying roller (30) and the rotating shaft (28).

10. The infusion pump with bubble detection according to claim 9, characterized in that: A protective cover (33) is fixedly mounted on the housing (1), and clamping blocks (34) are provided at four corners of the protective cover (33), and the clamping blocks (34) are fixedly connected to the housing (1).

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