CN219398489U

CN219398489U - Micro infusion device

Info

Publication number: CN219398489U
Application number: CN202222962891.1U
Authority: CN
Inventors: 周兴义; 陈宇龙; 蔡新坤
Original assignee: Wuxi Dingdian Medical Instrument Co ltd
Current assignee: Vertex Medical Equipment (Jiangsu) Co.,Ltd.
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-07-25
Anticipated expiration: 2032-11-08

Abstract

The utility model discloses a micro-infusion device, comprising: the micro-infusion device is simple in structure, low in use environment requirement, firm and durable and low in cost.

Description

Micro infusion device

Technical Field

The utility model relates to the field of medical care products, in particular to a micro-infusion device.

Background

Infusion devices are used to infuse substances such as medications into the subcutaneous layer of skin of a patient. Devices for assisting in the insertion of a cannula of an infusion device into the skin of a patient are well known. The common infusion device is an insulin pump, and because of the need of injecting insulin into a patient at regular time and quantity, the condition of the patient is easily aggravated and even life is dangerous.

The number of diabetics in China is 1 hundred million to 4000 ten thousand by 2021, about 7283 ten thousand of the diabetics are not diagnosed yet, and the proportion is up to 51.7%. Of these, about 1000 tens of thousands of diabetics need insulin injection. The existing infusion pump is integrated, and a motor is used for driving a screw rod to drive a guide rod to move, so that precise infusion is realized. The micro infusion device with the existing structure has complex structure and higher price. Because the guide rod is driven by the servo motor to precisely move, the precision machine needs to be careful in use, transmission numerical errors can be caused by vibration, and the precision machine can not be continuously used with great probability if the precision machine is carelessly dropped in the use process, so that the infusion precision can be influenced.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide a micro-infusion device which has simple structure, low requirements on use environment, firmness and durability and low cost.

According to one aspect of the present utility model, there is provided a microinjection apparatus comprising: shell, injection mouth, medicine storage bag, play medicine mouth and infusion portion all set up in the shell, and play medicine mouth intercommunication medicine storage bag, medicine storage bag pass through the pipe connection and go out the medicine mouth, and infusion portion connecting tube and extrusion pipeline make the liquid medicine get rid of from the medicine mouth, are equipped with the flowmeter between pipeline and the play medicine mouth.

In some embodiments, the infusion part comprises a motor, a cam and a compression rod assembly, one end of the compression rod assembly is close to the pipeline, the other end of the compression rod assembly is close to the cam, the motor drives the cam to rotate, and the cam drives the compression rod assembly to compress the pipeline.

In some embodiments, the cam comprises: the body, first arc is protruding, second arc is protruding, third arc is protruding and fourth arc is protruding, and body center is equipped with the mounting hole, and first arc is protruding, second arc is protruding, third arc is protruding and fourth arc is protruding to use the mounting hole to be central annular array and distributes at the body outer wall.

In some embodiments, the compression rod assembly is provided with at least 4.

In some embodiments, the extrusion rod assembly comprises a mounting groove, a compression rod, a first limit rod, a second limit rod and a spring, wherein the first limit rod is arranged at one end, far away from the cam, of the mounting groove, the second limit rod is arranged on the compression rod, the second limit rod is arranged at one end, close to the cam, of the compression rod, the spring is sleeved on the compression rod and limited between the first limit rod and the second limit rod, and the spring pushes the compression rod to the direction of the cam.

In some embodiments, one end of the mounting groove is connected to the pipe, a gap is formed between the other end of the mounting groove and the cam, one end of the pressure lever is tightly attached to the cam, and the other end of the pressure lever is driven by the cam to press the pipe.

In some embodiments, the two ends of the compression bar have rounded transition surfaces.

In some embodiments, the conduit has flexibility.

Compared with the prior art, the utility model has the advantages of simple structure, low requirement on use environment, firmness and durability and cost reduction; through the design that utilizes motor, cam and extrusion rod subassembly to replace motor, lead screw, guide bar and slide rail among the prior art, utilize the motor to drive the cam rotation and then make the cam promote extrusion rod subassembly extrusion pipeline, realize micro-infusion, can reduce cost through the structural design of cam simultaneously more sturdy and durable like this.

Drawings

FIG. 1 is an exploded schematic view of a microinfusion device of the present utility model;

FIG. 2 is a schematic view of the structure of an infusion part of the microinfusion device of the present utility model;

FIG. 3 is a schematic view of the structure of the squeeze lever assembly of the microinjection device of the present utility model;

fig. 4 is a schematic view of the structure of the cam of the micro-infusion device of the present utility model.

Detailed Description

The present utility model will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the utility model, and equivalent changes or substitutions of functions, methods or structures according to the embodiments by those skilled in the art are included in the scope of the present utility model.

In the description of the present utility model, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other between two elements, may be directly connected, or may be indirectly connected through an intermediate medium, and the specific meaning of the terms may be understood by those skilled in the art according to circumstances.

In the prior art, an insulin infusion pump consists of a pump, a small injector and an infusion tube connected with the small injector, after the injector is arranged in the pump, a guide needle at the front end of the connected infusion tube is pricked into the subcutaneous part (conventionally, the abdominal wall) of a patient by using an injector, then a spiral motor of the insulin pump is driven by a battery to push a piston of the small injector, so that the insulin is infused into the body, the insulin pump is basically used for simulating the secretion function of pancreas, and insulin is continuously injected into the subcutaneous part of a user according to the dosage required by a human body, so that the blood sugar is kept stable throughout the day, and the aim of controlling diabetes is fulfilled.

In the prior art, the motor 51 is powered by the battery, the motor 51 drives the screw rod (screw rod), the nut seat drives the push rod to infuse, and the screw rod and the installation of the push rod are required to ensure parallelism between the screw rod and the installation, and the installation of the screw rod is relatively precise, so that the belt has the defect of needing special care in the use process, vibration, especially dropping, is avoided as much as possible, the infusion dosage is inaccurate when the screw rod and the push rod are not parallel and can not be used continuously in serious, and serious consequences can occur if the user is unaware.

As shown in fig. 1, the microinfusion device according to the present utility model includes: the medicine storage device comprises a shell 1, a medicine injection port 2, a medicine storage bag 3, a medicine outlet 4 and an infusion part 5, wherein the medicine injection port 2, the medicine storage bag 3, the medicine outlet 4 and the infusion part 5 are all arranged in the shell 1, the medicine outlet 4 is communicated with the medicine storage bag 3, the medicine storage bag 3 is connected with the medicine outlet 4 through a pipeline 6, the infusion part 5 is connected with the pipeline 6 and extrudes the pipeline 6 to enable medicine liquid to be discharged from the medicine outlet 4, and a flowmeter 7 is arranged between the pipeline 6 and the medicine outlet 4. When the medicine is used, medicine liquid is infused into the medicine storage bag 3 from the medicine infusion port 2, the medicine liquid is stored in the medicine storage bag 3, the infusion part 5 infuses the medicine liquid into a patient from the pipeline 6 to the medicine outlet 4, and the medicine liquid is metered and fed back by the flowmeter 7 so as to control the start and stop of the motor 51 through the controller. Through the design that utilizes motor 51, cam 52 and extrusion rod subassembly 53 to replace motor 51, lead screw, guide bar and slide rail among the prior art, utilize motor 51 to drive cam 52 rotation and then make cam 52 promote extrusion rod subassembly 53 extrusion pipe 6, realize the microinjection, can reduce cost through the structural design of cam 52 simultaneously more sturdy and durable.

The duct 6 has flexibility. The pipeline 6 is made of medical nontoxic transparent soft polyvinyl chloride plastic or high-performance polyolefin thermoplastic elastomer material. The polyvinyl chloride plastic adopts soft polyvinyl chloride which generally contains 30-50% of plasticizer, and has good air tightness and water impermeability due to soft texture and high strength; the high-performance polyolefin thermoplastic elastomer material is rubber elastic at normal temperature, and has the characteristics of small density, large bending, high low-temperature impact resistance, easy processing, repeated use and the like. Therefore, the infusion part 5 can only squeeze the liquid under the condition of elastic property.

As shown in fig. 2, the infusion part 5 includes a motor 51, a cam 52 and a pressing rod assembly 53, one end of the pressing rod assembly 53 is close to the tube 6, the other end of the pressing rod assembly 53 is close to the cam 52, the motor 51 drives the cam 52 to rotate, and the cam 52 drives the pressing rod assembly 53 to press the tube 6. The motor 51 drives the cam 52 to rotate, so that the cam 52 pushes the extrusion rod assembly 53 to extrude the pipeline 6, and micro infusion is realized. The mechanical mechanism such as the motor 51 and the cam 52 is simpler and more efficient, and is not so careful from the viewpoint of use environment, while the cost of the motor 51 and the cam 52 is lower.

As shown in fig. 3, the extrusion rod assembly 53 is provided with at least 4. The working process total cam 52 drives at least one extrusion rod assembly 53 to extrude the pipeline 6, and the extrusion rod assembly 532 close to the medicine storage bag 3 extrudes the medicine liquid in the pipeline 6 for infusion. The cam 52 rotates to drive the plurality of extrusion rod assemblies 53 to sequentially extrude the pipeline 6 to realize the infusion of the micro-liquid medicine.

The extrusion rod assembly 53 includes a mounting groove 531, a compression rod 532, a first limit rod 533, a second limit rod 534 and a spring 535, wherein the first limit rod 533 is disposed at one end of the mounting groove 531 away from the cam 52, the second limit rod 534 is disposed on the compression rod 532, the second limit rod 534 is disposed at one end close to the cam 52, the spring 535 is sleeved on the compression rod 532 and is limited between the first limit rod 533 and the second limit rod 534, and the spring 535 pushes the compression rod 532 to the direction of the cam 52. The spring 535 is in a compressed state, and since the first stopper rod 533 is fixed to the mounting groove 531, the spring 535 pushes the pressing rod 532 toward the cam 52, and after the cam 52 presses, one end of the pressing rod 532 protrudes from the mounting groove 531 to press the pipe 6.

As shown in fig. 4, the cam 52 includes: the body 521, the first arc protruding 522, the second arc protruding 523, the third arc protruding 524 and the fourth arc protruding 525, the body 521 center is equipped with mounting hole 526, and the first arc protruding 522, the second arc protruding 523, the third arc protruding 524 and the fourth arc protruding 525 are distributed at the outer wall of the body 521 with the mounting hole 526 as the central annular array. The body 521 is square, sets up first arc protruding 522, second arc protruding 523, third arc protruding 524 and fourth arc protruding 525 respectively on four right angles of body 521, promotes the depression bar 532 along mounting groove 531 through first arc protruding 522, second arc protruding 523, third arc protruding 524 and fourth arc protruding 525 and removes to pipeline 6 until squeezing pipeline 6. Therefore, in order to ensure that the liquid medicine does not flow back, at least one of the first arc-shaped protrusion 522, the second arc-shaped protrusion 523, the third arc-shaped protrusion 524, and the fourth arc-shaped protrusion 525 needs to be pushed to the pressing lever 532 to press the tube 6. The output end of the motor 51 is fixedly arranged in the mounting hole 526, and the outer wall of the mounting hole 526 is connected with the housing 1 through a bearing.

One end of the mounting groove 531 is connected with the pipeline 6, a gap is reserved between the other end of the mounting groove 531 and the cam 52, one end of the pressing rod 532 is tightly attached to the cam 52, and the cam 52 drives the other end of the pressing rod 532 to press the pipeline 6. In the initial state, the pressing rod 532 is pushed to the cam 52 by the spring 535, and the pipe 6 is pressed only by the cam 52

The strut 532 has rounded transition surfaces at both ends. The arc transition surface is utilized to facilitate contact extrusion.

While only certain embodiments of the present utility model have been described, it will be apparent to those skilled in the art that other modifications and improvements can be made without departing from the inventive concept of the present utility model.

Claims

1. A microinfusion device, comprising: shell, injection mouth, medicine storage bag, medicine outlet and infusion portion all set up in the shell, medicine outlet intercommunication medicine storage bag, medicine storage bag passes through the pipe connection medicine outlet, infusion portion connecting tube and extrusion pipeline make the liquid medicine get rid of from the medicine outlet, be equipped with the flowmeter between pipeline and the medicine outlet.

2. The microinjection apparatus according to claim 1, wherein the infusion part includes a motor, a cam, and a pressing rod assembly, one end of the pressing rod assembly is adjacent to the tube, the other end of the pressing rod assembly is adjacent to the cam, the motor drives the cam to rotate, and the cam drives the pressing stem assembly to press the tube.

3. The micro-infusion device of claim 2, wherein the cam comprises: the novel arc-shaped lamp comprises a body, a first arc-shaped protrusion, a second arc-shaped protrusion, a third arc-shaped protrusion and a fourth arc-shaped protrusion, wherein a mounting hole is formed in the center of the body, and the first arc-shaped protrusion, the second arc-shaped protrusion, the third arc-shaped protrusion and the fourth arc-shaped protrusion are distributed on the outer wall of the body in an annular array with the mounting hole as the center.

4. The microinfusion device of claim 2, wherein the compression bar assembly is provided with at least 4.

5. The microinjection apparatus according to claim 4, wherein the pressing rod assembly includes a mounting groove, a pressing rod, a first stopper rod, a second stopper rod, and a spring, the first stopper rod is provided at an end of the mounting groove away from the cam, the second stopper rod is provided at the pressing rod, the second stopper rod is provided at an end close to the cam, the spring is sleeved on the pressing rod and is defined between the first stopper rod and the second stopper rod, and the spring urges the pressing rod in a direction toward the cam.

6. The micro-infusion device of claim 5, wherein one end of the mounting groove is connected with the pipeline, a gap is formed between the other end of the mounting groove and the cam, one end of the pressing rod is tightly attached to the cam, and the other end of the pressing rod is driven by the cam to press the pipeline.

7. The micro-infusion device of claim 5, wherein the two ends of the plunger have rounded transition surfaces.

8. The microinfusion device of claim 5, wherein the tubing has flexibility.