Infusion pump

Abstract

The application discloses an infusion pump, which comprises a shell and a pump body assembly arranged in the shell; the pump body assembly comprises a support, a pump head assembly, a plurality of pump blades arranged on the pump head assembly, a window on the shell for the pump blades to pass through, a pressure pipe block arranged corresponding to the window of the shell, a placement area formed between the pressure pipe block and the pump blades for placing an infusion pipe, an angle adjusting assembly connecting the pump head assembly and the support, a guide seat, and a positioning connector capable of positioning and connecting the guide seat and the support; the guide seat is provided with a rotating shaft matched with a mounting surface of the support; and the pump head assembly is connected with the guide seat. The infusion pump can avoid the inconsistent pressure of the pump blades, fatigue and quick conditions, improve the service life of the infusion pipe, improve the infusion precision of the pump body assembly, and reduce the liquid leakage probability and free flow risk of the whole pump body assembly.

Description

Technical Field

[0001] This invention relates to the field of infusion pump equipment technology, and in particular to an infusion pump. Background Technology

[0002] Infusion tubing is an instrument used to administer intravenous fluids to patients. Reliable fluid control and infusion accuracy are the two core technologies of the pump assembly. Currently, many pump assembly products have varying degrees of leakage, poor accuracy, and even free flow risks. Leakage allows excessive medication to enter the patient's body, causing discomfort or even harm. Poor accuracy leads to inaccurate infusion timing, which can delay treatment or cause overly rapid medication administration. Free flow can pose a life-threatening risk to the patient.

[0003] The pump body assembly is a key component for controlling accuracy. Conventional pump body assemblies, due to their complex structure, introduce significant errors and cannot guarantee consistent infusion tubing pressure across all pump blades to ensure infusion accuracy and reliable fluid closure. Inconsistent pressure on the infusion tubing can lead to accelerated fatigue in the tubing sections squeezed by some pump blades, resulting in faster tubing fatigue. Furthermore, inconsistent pressure from different pump blades on the infusion tubing can result in some blades exerting less pressure, leading to poor accuracy. In severe cases, it can even cause leakage from the entire pump body assembly, posing a risk of free flow.

[0004] Therefore, how to slow down the increase of fatigue in infusion tubing, improve accuracy, and reduce the risk of leakage and free flow is a problem that urgently needs to be solved by people in this technical field. Summary of the Invention

[0005] In view of this, the present invention provides an infusion pump to slow down the increase of fatigue in infusion tubing, improve accuracy, and reduce the risk of leakage and free flow.

[0006] This invention provides an infusion pump, including a housing and a pump body assembly disposed within the housing;

[0007] The pump assembly includes:

[0008] support;

[0009] A pump head assembly, wherein a plurality of pump blades are provided on the pump blade mounting side of the pump head assembly, and the housing has a window for the pump blades to pass through;

[0010] A pressure tube block is provided corresponding to the window of the housing, and a placement area for placing the infusion tube is formed between the pressure tube block and the pump plate;

[0011] An angle adjustment assembly is provided to connect the pump head assembly and the bracket. The angle adjustment assembly includes a guide seat and a positioning connector capable of positioning and connecting the guide seat and the bracket. The guide seat has a rotating shaft that rotatably engages with the mounting surface of the bracket. The pump head assembly is connected to the guide seat.

[0012] The infusion pump provided in this embodiment of the invention has a pump head assembly connected to a guide seat. The guide seat has a rotating shaft, which rotatably engages with the mounting surface of a bracket. Therefore, by rotating the guide seat along the shaft, the angle of the pump head assembly on the bracket can be adjusted. Then, a positioning connector is used to position the guide seat and the bracket, ensuring that the angle between the pump head assembly and the bracket remains constant. This achieves the adjustment of the distance between the multiple pump blades mounted on the pump blade mounting side of the pump head assembly and the pressure tube block, ensuring that each pump blade has a consistent infusion tube pressure. This effectively avoids rapid fatigue of the infusion tube due to inconsistent infusion tube pressure from the pump blades, reduces the rate of fatigue progression, and effectively improves the service life of the infusion tube. Furthermore, ensuring consistent infusion tube pressure across all pump blades effectively improves the infusion accuracy of the pump assembly and reduces the probability of leakage and the risk of free flow in the entire pump assembly. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a first structural schematic diagram of the pump body assembly in at least one embodiment;

[0015] Figure 2 This is a schematic diagram of the second structure of the pump body assembly in at least one embodiment;

[0016] Figure 3 This is a three-dimensional structural diagram of the guide seat in at least one embodiment;

[0017] Figure 4 This is a schematic front view of the guide seat in at least one embodiment;

[0018] Figure 5 For along Figure 4 A cross-sectional view of the AA plane;

[0019] Figure 6 This is a schematic diagram of the right-side structure of the guide seat in at least one embodiment;

[0020] Figure 7This is a rear view structural diagram of the guide seat in at least one embodiment;

[0021] Figure 8 A first partial cross-sectional view of the pump body assembly in at least one embodiment;

[0022] Figure 9 This is a second partial cross-sectional view of the pump body assembly in at least one embodiment. Detailed Implementation

[0023] This invention discloses an infusion pump to mitigate the increase in fatigue of infusion tubing, improve accuracy, and reduce the risk of leakage and free flow. The technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] Please refer to Figures 1-7 As shown, this embodiment of the invention provides an infusion pump, including a housing and a pump body assembly disposed within the housing; the pump body assembly includes a bracket 2, a pump head assembly 1, a pressure tube block 11, and an angle adjustment assembly. The pump head assembly 1 has multiple pump blades mounted on its blade mounting side, and the housing has windows through which the pump blades pass; the pressure tube block 11 is correspondingly disposed to the windows of the housing, and a placement area for placing an infusion tube 12 is formed between the pressure tube block 11 and the pump blades; the angle adjustment assembly includes a guide seat 3 and a positioning connector capable of positioning the guide seat 3 and the bracket 2, the guide seat 3 having a rotating shaft 8 that rotatably engages with the mounting surface of the bracket 2, and the pump head assembly 1 is connected to the guide seat 3.

[0025] In some embodiments, the pump head assembly 1 is connected to the guide seat 3, and the guide seat 3 has a rotating shaft 8, which is rotatably engaged with the mounting surface of the bracket 2. Therefore, by rotating the guide seat 3 along the rotating shaft 8, the angle of the pump head assembly 1 on the bracket 2 can be adjusted. Then, the positioning connector is used to position the guide seat 3 and the bracket 2, so that the angle positioning of the pump head assembly 1 and the bracket 2 remains unchanged. This completes the distance adjustment of the multiple pump blades set on the pump blade mounting side of the pump head assembly 1 relative to the pressure tube block 11, ensuring that each pump blade has a consistent infusion tube pressure. This effectively avoids the situation where the infusion tube is fatigued quickly due to inconsistent infusion tube pressure from each pump blade, reduces the rate of fatigue deepening of the infusion tube, and effectively improves the service life of the infusion tube. Furthermore, ensuring that each pump blade has a consistent infusion tube pressure effectively improves the infusion accuracy of the pump body assembly and reduces the probability of leakage and the risk of free flow of the entire pump body assembly.

[0026] It is understandable that multiple pump blades are arranged in a straight line, and the infusion tube pressure of the multiple pump blades is the pressure applied to the infusion tube when the multiple pump blades are in the same extended position. When the angle between the pump head assembly 1 and the support 2 is not appropriate, the infusion tube pressure of the multiple pump blades is inconsistent. Even if the overall pressure of the multiple pump blades is adjusted, only the pressure of some pump blades on the infusion tube of the pump head assembly 1 can be adjusted to be within a predetermined pressure range. However, it is impossible to avoid the pressure of individual pump blades on the infusion tube exceeding or falling below the predetermined pressure range. The infusion pump provided in this embodiment of the invention, by adjusting the angle between the pump head assembly 1 and the support 2, makes the infusion tube pressure of the multiple pump blades consistent. Furthermore, by adjusting the overall pressure of the multiple pump blades, the pressure of all pump blades on the infusion tube of the pump head assembly 1 is made to be within a predetermined pressure range.

[0027] The housing is equipped with a cover, and the pressure block 11 is disposed on the cover. After the infusion tube 12 is installed in the infusion tube groove, the cover is closed relative to the housing, so that the pressure block 11 pushes towards the pump head assembly 1 and positions the infusion tube 12, ensuring the stability of the infusion tube 12 when the pump plate squeezes the infusion tube 12.

[0028] In some of these embodiments, such as Figure 1 and Figure 2 As shown, the pump assembly consists of a motor, gears, a cam, a rotating shaft, and 12 pump blades. The 12 pump blades are mounted on the pump blade mounting side of the pump assembly and are arranged in a straight line. Driven by the motor, the 12 pump blades move back and forth alternately in a sinusoidal wave pattern, causing them to alternately squeeze the infusion tube 12 to achieve the infusion function. The pump blades at both ends of the 12 pump blades are the initial pump blade 9 and the final pump blade 10, respectively.

[0029] In some embodiments, to facilitate angle adjustment, a first pressure sensor 13 and a second pressure sensor 14 are provided between the pressure tube block 11 and the pump head assembly 1. The first pressure sensor 13 is used to detect the pressure value of the initial pump blade 9, and the second pressure sensor 14 is used to detect the pressure value of the end pump blade 10. When the pressure values ​​detected by the first pressure sensor 13 and the second pressure sensor 14 are equal, the positioning connector positions and connects the guide seat 3 and the bracket 2, completing the angle adjustment of the pump body assembly. Alternatively, two pads of the same thickness can be provided between the pressure tube block 11 and the pump head assembly 1, with the two pads corresponding to the initial pump blade 9 and the end pump blade 10 respectively, which can also complete the angle adjustment of the pump body assembly.

[0030] It is understandable that the mounting surface of bracket 2 is the surface on which the pump head assembly 1 is mounted.

[0031] In some embodiments, the guide seat 3 has a mounting hole, and the positioning connector is a screw; the screw passes through the mounting hole and connects to the mounting surface of the bracket 2. Alternatively, the positioning connector can be a snap-fit ​​structure or other components. The goal is simply to ensure that the guide seat 3 and bracket 2 can be positioned and connected. Once the distance between the multiple pump blades mounted on the pump blade mounting side of the pump head assembly 1 and the pressure tube block 11 is adjusted, further rotation of the pump head assembly 1 should be prevented.

[0032] In some of these embodiments, such as Figure 3 and Figure 4 As shown, the mounting holes include a first mounting hole 31 located near the rotating shaft 8 and a second mounting hole located away from the rotating shaft 8; the first mounting hole 31 is a round hole and has a clearance fit with the screw stud; the second mounting hole is an oblong hole, and the screw stud can move along the extension direction of the oblong hole during the rotation adjustment of the rotating shaft 8. That is, the position adjustment between the guide seat 3 and the bracket 2 can be achieved by rotating the guide seat 3, which facilitates installation.

[0033] In some embodiments, the oblong hole is a strip-shaped hole with an arc-shaped structure, the center of which is the axis of the rotating shaft 8. Of course, both the first mounting hole 31 and the second mounting hole can be set as round holes that fit with the stud of the screw with clearance, or both the first mounting hole 31 and the second mounting hole can be set as oblong holes.

[0034] In some embodiments, to further improve the stability of positioning, there are two second mounting holes, namely a first side second mounting hole 32 and a second side second mounting hole 33 provided on both sides of the guide seat 3, which effectively improves the positioning effect.

[0035] Because the angle adjustment of the pump head assembly 1 requires high precision, the angle adjustment assembly also includes an angle adjustment screw 6. The guide seat 3 has a first adjustment screw mounting part 34, and the bracket 2 has a second adjustment screw mounting part. One of the first and second adjustment screw mounting parts 34 is rotatably engaged with and axially positioned by the angle adjustment screw 6, while the other is threadedly engaged with the angle adjustment screw 6. By rotating the angle adjustment screw 6, the distance between the first and second adjustment screw mounting parts 34 and 2 can be adjusted, thereby adjusting the angle of the guide seat 3 and the bracket 2 relative to the bracket 2, thus achieving angle adjustment of the pump plate mounting side of the pump head assembly 1.

[0036] The angle adjusting screw 6 and the rotating shaft 8 should not be aligned. To facilitate adjustment as much as possible, the angle adjusting screw 6 is located at the end of the guide seat 3 away from the rotating shaft 8.

[0037] In some embodiments, a cam or wedge block structure can also be used to adjust the position of the guide seat 3. For example, a cam is rotatably mounted on the bracket 2, and the cam's wheel surface contacts the guide seat 3. Alternatively, the wedge block has two surfaces arranged at an angle, one surface sliding with the bracket 2 and the other surface sliding with the guide seat 3. These configurations can all achieve adjustment of the angle of the guide seat 3 relative to the bracket 2. Specific details are not provided here, and all are within the scope of protection.

[0038] In some of these embodiments, such as Figure 2 , Figure 6 and Figure 8 As shown, the second adjusting screw mounting part is rotatably engaged with the angle adjusting screw 6 and axially positioned, while the first adjusting screw mounting part 34 is threadedly engaged with the angle adjusting screw 6. The second adjusting screw mounting part is a groove provided on the mounting surface of the bracket 2, and the head of the angle adjusting screw 6 can be rotatably disposed in the groove. The two side walls of the groove are respectively in limiting contact with the top surface and the bottom surface of the head; the first adjusting screw mounting part 34 is threadedly engaged with the angle adjusting screw 6.

[0039] In some embodiments, the first adjusting screw mounting part 34 and the second adjusting screw mounting part can be rotatably engaged with and axially positioned with the angle adjusting screw 6, and the second adjusting screw mounting part and the angle adjusting screw 6 can be threadedly engaged. For example, a through hole is provided on the guide seat 3, the second adjusting screw mounting part is a threaded hole provided on the bracket 2, and the angle adjusting screw 6 passes through the through hole and is threadedly connected to the threaded hole.

[0040] In some embodiments, to facilitate setup and prevent the angle adjusting screw 6 from slipping, the pump body assembly also includes a limiting engagement structure that prevents the angle adjusting screw 6 from slipping off the first adjusting screw mounting portion 34.

[0041] In some embodiments, the limiting fit structure includes: a positioning hook located at one end of the angle adjusting screw 6 that extends into the first adjusting screw mounting portion 34; and a positioning groove communicating with the first adjusting screw mounting portion 34, wherein the positioning hook is slidably disposed in the positioning groove and the positioning hook is restricted from slipping out of the positioning groove.

[0042] The first adjusting screw mounting part 34 is a threaded hole, and the positioning groove can be a through hole. The diameter of the through hole is larger than the diameter of the first adjusting screw mounting part 34, so that the positioning hook can rotate in the through hole but cannot pass through the threaded hole.

[0043] In some embodiments, the first adjusting screw mounting part 34 can also be configured as a rack with threaded teeth that engage with the angle adjusting screw 6. During the rotation of the angle adjusting screw 6, the engagement length between the first adjusting screw mounting part 34 and the angle adjusting screw 6 is adjusted, thereby adjusting the position of the part of the guide seat 3 where the first adjusting screw mounting part 34 is located on the mounting surface of the bracket 2, and rotating the pump head assembly 1 with the rotating shaft 8 as the axis to adjust the angle of the pump head assembly 1.

[0044] In some embodiments, to further prevent leakage, the pump head assembly 1 and the guide seat 3 are slidably connected along the direction approaching and away from the window of the housing. A compression elastic device 1b is provided between the guide seat 3 and the pump head assembly 1, and the elastic force of the compression elastic device 1b pushes the pump head assembly 1 towards the window. Through the elastic force of the compression elastic device 1b, the elastic force is converted into pressure applied by the pump blades of the pump head assembly 1 to the infusion tube 12, effectively preventing insufficient pressure from the pump blades on the tube.

[0045] In some embodiments, to ensure pressure regulation, obtain reliable liquid-stopping function and consistent tubing pressure, and avoid the risk of free flow, the pump assembly also includes a spring force adjustment device for adjusting the elastic force of the compression elastic device 1b. By adjusting the elastic force of the compression elastic device 1b through the spring force adjustment device, the pressure applied by the pump blades of the pump head assembly 1 to the infusion tube 12 is adjusted, effectively avoiding insufficient tubing pressure from the pump blades, preventing leakage of the entire pump assembly, and also avoiding the risk of free flow.

[0046] In some of these embodiments, such as Figure 2 As shown, the pump assembly consists of a motor, gears, a cam, a rotating shaft, and 12 pump blades. The 12 pump blades are mounted on the pump blade mounting side of the pump assembly and are arranged in a straight line. Driven by the motor, the 12 pump blades move back and forth alternately in a sinusoidal wave pattern, causing them to alternately squeeze the infusion tube 12 to achieve the infusion function. The pump blades at both ends of the 12 pump blades are designated as the initial pump blade 9 and the final pump blade 10, respectively. In the initial position, the initial pump blade 9 and the final pump blade 10 are aligned. For convenient detection, a first pressure sensor 13 and a second pressure sensor 14 are installed between the pressure tube block 11 and the pump head assembly 1. The first pressure sensor 13 detects the pressure value of the initial pump blade 9, and the second pressure sensor 14 detects the pressure value of the final pump blade 10, facilitating precise pressure adjustment.

[0047] In some embodiments, the elasticity adjustment device may include: an elastic mounting bracket 35 disposed on the guide seat 3; a connector connected to one end of the compression elastic device 1b, the connector having a pressure adjustment screw hole; and a pressure adjustment screw 7, which is rotatably disposed on the elastic mounting bracket 35 and axially positioned with the elastic mounting bracket 35, the pressure adjustment screw hole being threadedly engaged with the pressure adjustment screw 7. By rotating the pressure adjustment screw 7 relative to the pressure adjustment screw hole, the distance between the connector and the elastic mounting bracket 35 is adjusted, pressing one end of the compression elastic device 1b against the pressure tube block 11, thereby reducing the distance between the two ends of the compression elastic device 1b and increasing the elastic restoring force of the compression elastic device 1b, thus completing the function of adjusting the elastic force of the compression elastic device 1b.

[0048] In some embodiments, the elasticity adjustment device may include: an elastic mounting bracket 35 disposed on the guide seat 3; a pressure adjusting screw fixedly connected to the elastic mounting bracket 35; a pressure adjusting nut threadedly engaged with the pressure adjusting screw; and a connector connected to one end of the compression elastic device 1b, the connector being axially telescopically mounted on the elastic mounting bracket 35 along the pressure adjusting screw, the side of the connector facing away from the pressure tube block 11 engaging with the side of the pressure adjusting nut facing the pressure tube block 11. A pressure adjusting screw 7 is rotatably mounted on the elastic mounting bracket 35 and axially positioned with the elastic mounting bracket 35. Similarly, by rotating the pressure adjusting nut relative to the pressure adjusting screw, the distance between the pressure adjusting nut and the elastic mounting bracket 35 is adjusted. The pressure adjusting nut, through the connector, presses against the pressure tube block 11, compressing one end of the elastic device 1b, thereby reducing the distance between the two ends of the compression elastic device 1b and increasing the elastic restoring force of the compression elastic device 1b, thus completing the function of adjusting the elastic force of the compression elastic device 1b.

[0049] In some embodiments, to improve the sliding stability between the pump head assembly 1 and the guide seat 3, the guide seat 3 has a first linear bearing 3a and a second linear bearing 3b; the pump head assembly 1 is provided with a guide shaft 4, which slides in cooperation with the first linear bearing 3a and the second linear bearing 3b. Alternatively, only one linear bearing may be provided; a slide rail and a slider may also be provided, wherein the pump head assembly 1 is connected to the slider, and the slider is provided on the guide seat 3.

[0050] In some of these embodiments, such as Figure 1 and Figure 2 As shown, the pump head assembly 1 has a connecting sleeve on its housing, and the guide shaft 4 is fitted inside the connecting sleeve; the guide shaft 4 and the connecting sleeve are connected by fastening screws 5. This arrangement facilitates the processing of the components. Furthermore, by adjusting the mating position of the guide shaft 4 and the connecting sleeve, the elastic force of the compression elastic device 1b can be further adjusted.

[0051] In some of these embodiments, such as Figure 9 As shown, the bracket 2 also includes a hook 1a to restrict the pump head assembly 1 from moving away from the bracket 2. By setting the hook 1a, the stability of the pump head assembly 1 mounted on the bracket 2 is effectively improved.

[0052] In some embodiments, for ease of processing, the hook 1a is a bent part cut and bent from the bracket 2.

[0053] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An infusion pump, characterized by Includes a housing and a pump assembly disposed within the housing; The pump assembly includes: support; A pump head assembly, wherein a plurality of pump blades are provided on the pump blade mounting side of the pump head assembly, and the housing has a window for the pump blades to pass through; A pressure tube block is provided corresponding to the window of the housing, and a placement area for placing the infusion tube is formed between the pressure tube block and the pump plate; An angle adjustment assembly includes a guide seat and a positioning connector capable of positioning the guide seat and the bracket. The guide seat has a rotating shaft that rotatably engages with the mounting surface of the bracket. The housing of the pump head assembly is connected to the guide seat. The guide seat can be rotated along the pivot to adjust the angle of the pump head assembly on the bracket. The positioning connector is then used to position the guide seat and the bracket, so that the angle between the pump head assembly and the bracket remains unchanged. This completes the adjustment of the distance between the multiple pump blades mounted on the pump blade mounting side of the pump head assembly and the pressure pipe block.

2. The infusion pump of claim 1, wherein, The guide seat has mounting holes, and the positioning connector is a screw; The screw passes through the mounting hole and connects to the mounting surface of the bracket.

3. The infusion pump of claim 2, wherein, The mounting holes include a first mounting hole located near the rotating shaft and a second mounting hole located away from the rotating shaft; The first mounting hole is a round hole and has a clearance fit with the stud of the screw; the second mounting hole is an oblong hole, and the stud of the screw can move along the extension direction of the oblong hole during the rotation adjustment of the shaft.

4. The infusion pump of claim 1, wherein, The angle adjustment assembly also includes an angle adjustment screw; The guide seat is provided with a first adjusting screw mounting part, and the bracket is provided with a second adjusting screw mounting part; One of the first adjusting screw mounting part and the second adjusting screw mounting part is rotatably engaged with the angle adjusting screw and axially positioned, and the other of the first adjusting screw mounting part and the second adjusting screw mounting part is threadedly engaged with the angle adjusting screw.

5. The infusion pump of claim 4, wherein, The second adjusting screw mounting part is a groove provided on the mounting surface of the bracket. The head of the angle adjusting screw can be rotatably disposed in the groove. The two side walls of the groove are respectively in limiting contact with the top surface and the bottom surface of the head. The first adjusting screw mounting part is threadedly engaged with the angle adjusting screw.

6. The infusion pump of claim 5, wherein, The pump body assembly also includes a limiting fit structure that prevents the angle adjusting screw from slipping off the first adjusting screw mounting portion.

7. The infusion pump of claim 6, wherein, The limiting fit structure includes: A positioning hook located at one end of the angle adjusting screw that extends into the mounting part of the first adjusting screw; The positioning slide groove is connected to the first adjusting screw mounting part, and the positioning hook is slidably disposed in the positioning slide groove and the positioning hook is restricted from sliding out of the positioning slide groove.

8. The infusion pump of claim 1, wherein, The pump head assembly is slidably connected to the guide seat in directions approaching and away from the window; A compression elastic device is provided between the guide seat and the pump head assembly, and the elastic force of the compression elastic device pushes the pump head assembly toward the pressure tube block.

9. The infusion pump of claim 8, wherein, The pump assembly also includes a spring force adjustment device for adjusting the elastic force of the compression elastic device.

10. The infusion pump of claim 9, wherein, The elasticity adjustment device includes: An elastic mounting frame arranged on the guide seat; A connecting piece connected with one end of the compression elastic device, the connecting piece being provided with a pressure adjusting screw hole; A pressure adjusting screw, which is arranged on the elastic mounting frame in a rotating manner and is axially positioned with the elastic mounting frame, the pressure adjusting screw hole being threadedly matched with the pressure adjusting screw.

11. The infusion pump of claim 9, wherein, The elastic force adjusting device comprises: An elastic mounting frame arranged on the guide seat; A pressure adjusting screw rod fixedly connected with the elastic mounting frame; A pressure adjusting nut threadedly matched with the pressure adjusting screw rod; A connecting piece connected with one end of the compression elastic device, the connecting piece being arranged on the elastic mounting frame in an axial telescopic manner, a surface of the connecting piece away from the pressure pipe block being in contact with a surface of the pressure adjusting nut facing the pressure pipe block.

12. The infusion pump of claim 8, wherein, The guide seat is provided with a first linear bearing and a second linear bearing; The pump head assembly is provided with a guide shaft, which is in sliding contact with the first linear bearing and the second linear bearing.

13. The infusion pump of claim 12, wherein, The guide shaft is sleeved in a connecting sleeve on the housing of the pump head assembly; The guide shaft and the connecting sleeve are connected through a fastening screw.

14. The infusion pump of claim 1, wherein, The bracket further comprises a clamping hook for limiting the pump head assembly from moving away from the bracket.

15. The infusion pump of claim 14, wherein, The clamping hook is a bent piece cut and bent from the bracket.

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