Micro infusion pump

Abstract

The utility model discloses a micro infusion pump which is characterized in that a base is adopted, and a containing cavity and two penetrating openings communicated with the containing cavity are formed in the base; the driving motor is installed on the base, the infusion hose is contained in the containing cavity, and the two ends of the infusion hose extend out of the two penetrating openings respectively. A mounting seat of the extrusion mechanism is accommodated in the accommodating cavity and is in transmission connection with the driving motor, a plurality of clamping grooves are formed in the surface of the mounting seat and are arranged at intervals in the circumferential direction of the mounting seat, the end part of an extrusion rod is clamped in one clamping groove, and the end part, deviating from the mounting seat, of the extrusion rod can abut against the surface of the infusion hose. According to the micro infusion pump, medical staff can conveniently replace the extrusion rods with different numbers according to actual conditions of patients so as to achieve infusion modes of different users, and therefore the compatibility of the micro infusion pump is good.

Description

Technical Field

[0001] The utility model relates to the technical field of detection technology equipment, in particular to a micro-infusion pump. Background Art

[0002] Infusion pumps are usually mechanical or electronic control devices that control the infusion rate by acting on the infusion catheter. They are often used in situations where the infusion volume and drug dosage need to be strictly controlled, such as when using pressor drugs, antiarrhythmic drugs, intravenous infusion of infants or intravenous anesthesia. The following is a discussion of the issues that should be paid attention to in the daily operation, maintenance and preservation of infusion pumps in combination with actual clinical applications. At present, the infusion pump is mainly a peristaltic infusion pump, and its working principle is mainly based on the principle of peristaltic pumps. The core is to pump fluids by alternately squeezing and releasing the pump tube through rollers.

[0003] In the related art, the peristaltic infusion pump mainly squeezes the hose repeatedly and alternately through the driving structure, so that the liquid in the hose gradually moves forward and the fluid is pushed out continuously. At present, the squeezing rod of the driving structure is generally fixed. When different infusion modes of different dosages need to be achieved, different models of infusion pumps need to be replaced, which means that the compatibility of existing infusion pumps is poor. Utility Model Content

[0004] The main purpose of the utility model is to provide a micro-infusion pump, aiming to achieve more diverse infusion modes and thus improve its compatibility.

[0005] To achieve the above-mentioned purpose, the micro-infusion pump proposed by the utility model comprises:

[0006] A base, wherein the base is formed with a receiving cavity and two through openings communicating with the receiving cavity;

[0007] A driving motor, wherein the driving motor is mounted on the base;

[0008] An infusion hose is accommodated in the accommodating cavity, and two ends of the infusion hose extend out from the two through openings respectively; and

[0009] The extrusion mechanism includes a mounting seat and a plurality of extrusion rods. The mounting seat is accommodated in the accommodating cavity and is transmission-connected to the driving motor. A plurality of clamping grooves are provided on the surface of the mounting seat. The plurality of clamping grooves are arranged at intervals along the circumference of the mounting seat. An end of the extrusion rod is clamped in one of the clamping grooves, and the end of the extrusion rod facing away from the mounting seat can abut against the surface of the infusion hose.

[0010] In an optional embodiment, the clamping groove includes a limiting section and a penetrating section that are connected to each other, the area of ​​the limiting section is larger than the area of ​​the penetrating section, and the penetrating section penetrates the side wall surface of the mounting seat.

[0011] In an optional embodiment, the extrusion mechanism further includes a pressure cover, a surface of which is convexly provided with a plurality of snap-in protrusions, and the plurality of snap-in protrusions are snap-fitted into the snap-in groove to press the end of the extrusion rod into the snap-in groove.

[0012] In an optional embodiment, the extrusion rod includes a rod body, a connecting seat and an extrusion wheel, one end of the rod body is clamped in the clamping groove, the connecting seat is connected to the other end of the rod body, and the extrusion wheel is rotatably connected to the connecting seat and can abut against the surface of the infusion hose.

[0013] In an optional embodiment, the extrusion rod further includes a torsion spring, the connecting seat and the end of the rod body are rotatably connected, and the torsion spring is elastically connected to the connecting seat and the rod body.

[0014] In an optional embodiment, the extrusion rod also includes a plurality of adjustment members mounted on the mounting seat, one adjustment member corresponds to one connecting seat, and the adjustment member can abut against the surface of the connecting seat to adjust the swing angle of the connecting seat relative to the rod body.

[0015] In an optional embodiment, the adjusting member includes a connecting screw and an adjusting seat, the adjusting seat is provided with a connecting hole passing through its upper and lower surfaces, the mounting seat is provided with a mounting threaded hole corresponding to the connecting hole, and the connecting screw is passed through the connecting hole and the mounting threaded hole.

[0016] In an optional embodiment, the infusion hose includes a tube body and two fixed clamps, the fixed clamps are provided with fixed clamp holes, the opposite ends of the tube body are respectively passed through the two fixed clamp holes, and the fixed clamps are clamped in the through-holes.

[0017] In an optional embodiment, a positioning rib is convexly formed on the side wall surface of the through opening, and positioning grooves are provided on opposite sides of the fixed block, and the positioning rib is embedded in the positioning groove.

[0018] In an optional embodiment, the micro-infusion pump further includes an end cover, which is detachably connected to the base and seals the accommodating cavity.

[0019] The technical solution of the utility model adopts a base, which is formed with a accommodating cavity and two through-holes connected to the accommodating cavity; the driving motor is installed on the base, the infusion hose is accommodated in the accommodating cavity, and the two ends of the infusion hose extend out from the two through-holes respectively; the mounting seat of the extrusion mechanism is accommodated in the accommodating cavity and is transmission-connected with the driving motor, and a plurality of clamping grooves are provided on the surface of the mounting seat, and the plurality of clamping grooves are arranged at intervals along the circumference of the mounting seat, and the end of an extrusion rod is clamped in a clamping groove, and the end of the extrusion rod away from the mounting seat can abut against the surface of the infusion hose.

[0020] In the present invention, an external infusion syringe is connected to one end of an infusion hose through a pipeline, and the other end of the infusion hose is plugged into the patient through a puncture needle. The driving motor drives the mounting seat to rotate, so that the end of the extrusion rod reciprocates against the surface of the infusion hose, thereby squeezing the internal liquid medicine into the patient's body. It can be understood that the amount of medicine delivered to the patient at a time is the length of the infusion hose squeezed by the two extrusion rods, that is, the interval between the two extrusion rods. In the present invention, the end of the extrusion rod is clamped in the clamping groove, so that the installation of the extrusion rod is relatively convenient, and it is convenient for medical staff to replace different numbers of extrusion rods according to the actual situation of the patient to realize the infusion mode of different users, so that the compatibility of the micro-infusion pump is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a schematic structural diagram of an embodiment of the micro-infusion pump of the utility model;

[0023] Figure 2 for Figure 1 A front view of the internal structure of the micro-infusion pump shown;

[0024] Figure 3 for Figure 1 The structural exploded view of the micro-infusion pump shown.

[0025] Description of Figure Numbers:

[0026] Micro-infusion pump 100, base 10, accommodating cavity 10a, through-hole 10b, positioning rib 11, drive motor 20, infusion hose 30, tube body 31, fixed block 32, mounting seat 41, clamping groove 41a, limiting section 411a, through-section 412a, mounting threaded hole 41b, extrusion rod 42, rod body 421, connecting seat 422, extrusion wheel 423, adjusting member 424, connecting screw 4241, adjusting seat 4242, connecting hole 4242a, pressure cover 43, clamping protrusion 431, end cover 50. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] Reference Figures 1 to 3 The utility model provides a micro-infusion pump 100.

[0031] The micro-infusion pump 100 proposed by the utility model comprises: a base 10, wherein the base 10 is formed with a receiving cavity 10a and two through-holes 10b communicating with the receiving cavity 10a; a driving motor 20, wherein the driving motor 20 is mounted on the base 10; an infusion hose 30, which is accommodated in the receiving cavity 10a, and the two ends of the infusion hose 30 extend out from the two through-holes 10b respectively; an extrusion mechanism (not shown), wherein the extrusion mechanism comprises a mounting seat 41 and a plurality of extrusion rods 42, wherein the mounting seat 41 is accommodated in the receiving cavity 10a and is drivingly connected to the driving motor 20, wherein a plurality of clamping grooves 41a are provided on the surface of the mounting seat 41, wherein the plurality of clamping grooves 41a are arranged at intervals along the circumference of the mounting seat 41, wherein an end of the clamping rod 42 is clamped in one of the clamping grooves 41a, and an end of the clamping rod 42 away from the mounting seat 41 can abut against the surface of the infusion hose 30.

[0032] Specifically, in this embodiment, the base 10 can be integrally formed of medical grade plastic material, and the base 10 is a U-shaped shell-shaped cavity structure, forming a receiving cavity 10a for receiving the infusion hose 30 and other mechanisms of the micro-infusion pump 100, and the upper and lower sides of the base 10 are also formed with through-holes 10b connected to the receiving cavity 10a, and the through-holes 10b are used to expose the two ends of the infusion hose 30. The drive motor 20 is fixed to the base 10 by screws, and its output shaft part extends into the receiving cavity 10a. The mounting seat 41 is provided with a transmission connection hole 4242a adapted to the output shaft, and the end of the input shaft is clamped in the transmission connection hole 4242a, so that the mounting seat 41 and the drive motor 20 are transmission-connected, and the drive motor 20 drives the mounting seat 41 to rotate in the receiving cavity 10a.

[0033] In this embodiment, the external infusion syringe is connected to one end of the infusion hose 30 through a pipeline, and the other end of the infusion hose 30 is plugged into the patient through a puncture needle. The driving motor 20 drives the mounting seat 41 to rotate, so that the end of the squeezing rod 42 is reciprocated against the surface of the infusion hose 30, and then the liquid medicine inside is squeezed and delivered to the patient's body. It can be understood that the amount of medicine delivered to the patient at a time is the length of the infusion hose 30 squeezed by the two squeezing rods 42, that is, the interval between the two squeezing rods 42. In this embodiment, the end of the squeezing rod 42 is clamped in the clamping groove 41a, so that the installation of the squeezing rod 42 is relatively convenient, and it is convenient for medical staff to replace different numbers of squeezing rods 42 according to the actual situation of the patient to realize the infusion mode of different users, so that the compatibility of the micro-infusion pump 100 is better.

[0034] Please see again Figure 3In this embodiment, the clamping groove 41a includes a limit section 411a and a through section 412a that are connected, wherein the limit section 411a is circular in shape, and the through section 412a is rectangular in shape, and the area of ​​the limit section 411a in the vertical projection direction is larger than the area of ​​the through section 412a, and the through section 412a penetrates the side wall surface of the mounting seat 41, and accordingly, the shape of the end of the extrusion rod 42 embedded in the clamping groove 41a is adapted to the shape. In the present application, by setting the clamping groove 41a as the limit section 411a and the through section 412a that are connected, the installation of the extrusion rod 42 is not only more convenient, but also the connection is more stable.

[0035] Furthermore, the extrusion mechanism also includes a pressure cover 43, which is formed by injection molding to form a plurality of snap-in protrusions 431 on its surface. The shapes of the plurality of snap-in protrusions 431 correspond to the shapes of the snap-in grooves 41a, and their sizes are slightly larger than the outer contour of the snap-in grooves 41a, that is, the snap-in protrusions 431 and the snap-in grooves 41a are interference fit. When the end of the extrusion rod 42 is snapped into the snap-in groove 41a, the snap-in protrusions 431 are embedded in the upper part of the snap-in groove 41a, which can not only connect and fix the pressure cover 43 and the mounting seat 41, but also press the end of the extrusion rod 42 into the snap-in groove 41a in the vertical direction. In this way, the connection between the extrusion rod 42 and the mounting seat 41 is more firmly established through the horizontal limitation of the snap-in groove 41a and the vertical limitation of the snap-in protrusions 431.

[0036] Please see again Figure 2 In one embodiment of the present invention, the extrusion rod 42 includes a rod body 421, a connection seat 422 and an extrusion wheel 423, wherein the rod body 421 is also integrally formed of a medical-grade plastic material, one end of the rod body 421 is clamped in the clamping groove 41a, the connection seat 422 is connected to the other end of the rod body 421, and the extrusion wheel 423 is rotatably connected to the connection seat 422 and can abut against the surface of the infusion hose 30. In this embodiment, the structure of the extrusion rod 42 is relatively simple, and the extrusion wheel 423 squeezes the infusion hose 30, which can prevent the extrusion rod 42 from being stuck due to the friction force from the infusion hose 30, so that the operation of the micro-infusion pump 100 is smoother and more stable.

[0037] Please see again Figure 2When the driving motor 20 drives the squeezing rod 42 to start contacting the infusion hose 30, the stress on the infusion hose 30 is gradually increasing, that is, the diameter of the infusion hose 30 gradually decreases. During this process, the other squeezing rod 42 located at the far end begins to leave the surface of the infusion hose 30, and the diameter of the infusion hose 30 gradually increases. It can be understood that the interval between the squeezing rods 42 can not only control the delivery amount of the liquid medicine, but also the time and position of the squeezing rod 42 squeezing the infusion hose 30 can control the speed and gentleness of the delivery of the liquid medicine in the infusion hose 30 to the patient. Therefore, in this embodiment, the squeezing rod 42 also includes a torsion spring, and the ends of the connecting seat 422 and the rod body 421 are rotatably connected through a rotating shaft (not shown in the figure), and the torsion spring is elastically connected to the connecting seat 422 and the rod body 421. In this way, through the elastic force of the torsion spring, the squeezing wheel 423 can squeeze the infusion hose 30 or release the infusion hose 30 more smoothly, so that the delivery of the drug solution to the patient is also smoother, and the infusion effect of the micro-infusion pump 100 is better.

[0038] Furthermore, in this embodiment, the extrusion rod 42 further includes a plurality of adjustment members 424 mounted on the mounting seat 41 , one adjustment member 424 corresponds to one connecting seat 422 , and the adjustment member 424 can abut against the surface of the connecting seat 422 .

[0039] Specifically, the adjusting member 424 includes a connecting screw 4241 and an adjusting seat 4242. The adjusting seat 4242 can be integrally formed of metal or plastic material. The adjusting seat 4242 is in a "T" shape as a whole, and is provided with a connecting hole 4242a that runs through its upper and lower surfaces. The mounting seat 41 is provided with a mounting threaded hole 41b corresponding to the connecting hole 4242a. The connecting screw 4241 is passed through the connecting hole 4242a and the mounting threaded hole 41b to connect and fix the mounting seat 41 and the adjusting seat 4242. In this embodiment, since the adjusting seat 4242 is in a "T" shape, the position of the adjusting seat 4242 abutting against the connecting seat 422 can be adjusted by rotating the adjusting seat 4242, so that the connecting seat 422 abuts against the surface of the adjusting seat 4242 at a certain rotation position, so that it finally presents a preset angle with the rod body 421.

[0040] It is understandable that when the extrusion wheel 423 abuts against the infusion hose 30, the mounting seat 41 will swing relative to the rod body 421 due to the friction force, affecting the force of the extrusion wheel 423 abutting against the infusion hose 30, thereby affecting the smoothness of the infusion. Therefore, in this embodiment, the adjustment member 424 can abut against the surface of the connecting seat 422 to adjust the swing angle of the connecting seat 422 relative to the rod body 421. In this way, the micro-infusion pump 100 has better infusion compatibility and can better meet the needs of different infusion situations.

[0041] Please see again Figure 2 and Figure 3 In one embodiment of the utility model, the infusion hose 30 includes a tube body 31 and two fixing blocks 32, wherein the fixing block 32 is provided with a fixing hole for the tube body 31 to pass through and connect, positioning grooves are formed on both sides of the fixing block 32, and a positioning convex rib 11 matching the positioning groove is formed on the side wall surface of the through opening 10b, the fixing block 32 is embedded in the fixing hole, and the positioning convex rib 11 is embedded in the positioning groove, so that the fixing block 32 is connected and fixed to the mounting seat 41. In this embodiment, the tube body 31 is fixed in the accommodating cavity 10a by two fixing blocks 32, and its disassembly and assembly are relatively convenient, which is convenient for medical staff to maintain.

[0042] Furthermore, the micro-infusion pump 100 also includes an end cover 50, which can be detachably connected to the base 10 via a connection structure such as screws or snaps. The end cover 50 seals the accommodating cavity 10a to ensure that external impurities will not contaminate the infusion hose 30 during the operation of the micro-infusion pump 100, thereby ensuring the safety of infusion.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A micro-infusion pump, characterized in that: include: A base, wherein the base is formed with a receiving cavity and two through openings communicating with the receiving cavity; A driving motor, wherein the driving motor is mounted on the base; An infusion hose is accommodated in the accommodating cavity, and two ends of the infusion hose extend out from the two through openings respectively; as well as The extrusion mechanism includes a mounting seat and a plurality of extrusion rods. The mounting seat is accommodated in the accommodating cavity and is transmission-connected to the driving motor. A plurality of clamping grooves are provided on the surface of the mounting seat. The plurality of clamping grooves are arranged at intervals along the circumference of the mounting seat. An end of the extrusion rod is clamped in one of the clamping grooves, and the end of the extrusion rod facing away from the mounting seat can abut against the surface of the infusion hose.

2. The micro-infusion pump according to claim 1, characterized in that: The clamping groove comprises a limiting section and a penetrating section which are connected to each other. The area of ​​the limiting section is larger than the area of ​​the penetrating section, and the penetrating section penetrates the side wall surface of the mounting seat.

3. The micro-infusion pump according to claim 1, characterized in that: The extrusion mechanism further comprises a pressing cover, a surface of which is convexly provided with a plurality of clamping protrusions, and the plurality of clamping protrusions are clamped in the clamping grooves to press the end of the extrusion rod in the clamping grooves.

4. The micro-infusion pump according to claim 1, characterized in that: The extrusion rod includes a rod body, a connecting seat and an extrusion wheel. One end of the rod body is clamped in the clamping groove, the connecting seat is connected to the other end of the rod body, and the extrusion wheel is rotatably connected to the connecting seat and can abut against the surface of the infusion hose.

5. The micro-infusion pump according to claim 4, characterized in that: The extrusion rod further comprises a torsion spring, the connection seat and the end of the rod body are rotatably connected, and the torsion spring is elastically connected to the connection seat and the rod body.

6. The micro-infusion pump according to claim 5, characterized in that: The extrusion rod also includes a plurality of adjustment members installed on the mounting seat, one of the adjustment members corresponds to one of the connecting seats, and the adjustment member can abut against the surface of the connecting seat to adjust the swing angle of the connecting seat relative to the rod body.

7. The micro-infusion pump according to claim 6, characterized in that: The adjusting member comprises a connecting screw and an adjusting seat, the adjusting seat is provided with a connecting hole penetrating through its upper and lower surfaces, the mounting seat is provided with a mounting threaded hole corresponding to the connecting hole, and the connecting screw is passed through the connecting hole and the mounting threaded hole.

8. The micro-infusion pump according to any one of claims 1 to 7, characterized in that: The infusion hose comprises a tube body and two fixed clamping blocks, wherein the fixed clamping blocks are provided with fixed clamping holes, and opposite ends of the tube body are respectively passed through the two fixed clamping holes, and the fixed clamping blocks are clamped at the through opening.

9. The micro-infusion pump according to claim 8, characterized in that: The side wall surface of the through opening is convexly provided with positioning ribs, and the two opposite sides of the fixed block are provided with positioning grooves, and the positioning ribs are embedded in the positioning grooves.

10. The micro-infusion pump according to any one of claims 1 to 7, characterized in that: The micro-infusion pump also includes an end cover, which is detachably connected to the base and seals the accommodating cavity.

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