CN115501421A

CN115501421A - Infusion device

Info

Publication number: CN115501421A
Application number: CN202211211244.5A
Authority: CN
Inventors: 何兵兵
Original assignee: Hebei Bird's Nest Technology Co ltd
Current assignee: Hebei Bird's Nest Technology Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-12-23

Abstract

The invention provides an infusion device, relates to the technical field of infusion equipment, and aims to solve the technical problem that the existing non-gravity infusion equipment is poor in use effect; the infusion device comprises a shell and a pressurizing assembly; the shell is internally provided with a closed cavity for holding the infusion bag, the side wall of the cavity is provided with an output hole for the output port of the infusion bag to pass through in a sealing way, and the cavity is also filled with a medium; the pressurizing assembly is a medium conveying unit capable of inputting a medium into the cavity and/or an extruding unit capable of compressing the space of the cavity; the infusion bag can output the liquid medicine through the output port due to the increase of the medium pressure in the cavity. The infusion device has a good using effect.

Description

Infusion device

Technical Field

The invention relates to the technical field of infusion equipment, in particular to an infusion device.

Background

Intravenous injection is a medical method for directly injecting liquid substances such as blood, liquid medicine, nutrient solution and the like into the veins of patients; the common intravenous injection modes generally comprise two modes, namely syringe direct injection and intravenous drip, namely common injection and infusion.

In the existing infusion mode, an infusion bag or an infusion bottle needs to be hung at a position higher than a patient and is input into the body of the patient under the action of gravity of liquid in the bag or the bottle; but this approach is generally applicable to conventional medical environments; in some situations, for example, under the condition that a lot of people need first aid, such as sudden natural disasters or war chaos, a position suitable for hanging an infusion bottle or an infusion bag may not exist on the site, and rescue of a patient may be delayed; moreover, the suspended infusion bag or infusion bottle is inconvenient for the patient who needs to be transported and the patient who needs to get up for medical service independently.

In order to solve the above problems, various non-gravity infusion devices have been developed in the prior art, and the working modes thereof mainly include: the infusion bag and the air bag are arranged in a container at the same time, and then the infusion bag is extruded by the air bag by increasing the volume of the air bag, so that the liquid medicine in the infusion bag is finally output. For example, the Chinese patent application with the application number of 202110355861.1 and the patent name of the infusion device is Chinese invention patent application, which leads the infusion bag to output the liquid medicine by inputting the medium into the pressure bag, expanding and extruding the infusion bag by the pressure bag;

the non-gravity type transfusion device has the defects that: because the pressure applying bag and the infusion bag can not fully occupy the container, and the medium is filled into the pressure applying bag, when the pressure applying bag is expanded, the proportion of the expanded part of the pressure applying bag for occupying the container and extruding the infusion bag is uncertain, or the liquid medicine output caused by the expansion of the air bag is unstable, and the liquid medicine flow is generally required to be uniform and stable for human body infusion, therefore, the existing non-gravity infusion device can only be used in the scene with low requirement on the stability of the infusion flow.

Disclosure of Invention

Therefore, the invention provides an infusion device which has a better using effect.

The technical scheme of the invention is as follows:

an infusion device comprising a housing and a pressurizing assembly; the infusion bag packaging device is characterized in that a closed cavity used for containing an infusion bag is arranged in the shell, an output hole used for allowing an output port of the infusion bag to pass through in a sealing mode is formed in the side wall of the cavity, and a medium is filled in the cavity;

the pressurizing assembly is a medium conveying unit capable of inputting a medium into the cavity and/or an extruding unit capable of compressing the space of the cavity;

the infusion bag can output the liquid medicine through the output port due to the increase of the medium pressure in the cavity.

Furthermore, the shell comprises a shell body and a cover body, the shell body is hinged to the cover body, the cover body can rotate to be buckled with the shell body to form a closed cavity, and can rotate to enable the cavity to be open, so that the infusion bag can be placed into the cavity.

Furthermore, a plurality of clamping units are arranged on the bottom surface of the cavity body opposite to the cover body; each clamping unit comprises a base block and a clamping block, the clamping blocks are slidably arranged on the base block, and the clamping blocks can bear the pushing of the cover body and slide to the side edges of the infusion bag clamped by the base blocks.

Furthermore, an arm fixing part is arranged on the shell and can be connected with the arm of the patient to fix the shell relative to the arm of the patient.

Further, the medium is liquid, and the infusion device further comprises a medium storage part; the medium conveying unit is a pump body, and the input end of the pump body is communicated with the medium storage part.

Furthermore, a liquid flow sensor is arranged on the conveying pipeline

Further, the medium storage portion is a capsule fixedly disposed with respect to the housing.

Further, the medium is gas, and the medium conveying unit is an air pump;

the shell is provided with two infusion tube fixing parts which are arranged at intervals, and infusion tubes can be clamped on the two infusion tube fixing parts;

the infusion device further comprises a non-contact flow sensor, and the non-contact flow sensor is used for detecting the liquid flow in the infusion tube between the two infusion tube fixing parts.

Further, the extrusion unit comprises a motor and a piston which is connected with the motor and is slidably arranged in the shell; and driven by the motor, the piston can slide towards the direction that makes the cavity volume diminish.

Furthermore, the device also comprises a control module, a display module and an adjusting module; the display module, the adjusting module and the pressurizing assembly are respectively and electrically connected with the control module;

the adjusting module can receive external operation and send an adjusting signal to the control module, and the control module can respond to the adjusting signal to control the actions of the pressurizing assembly and the display module.

The working principle and the beneficial effects of the invention are as follows:

according to the infusion device provided by the invention, through arranging the shell and the pressurizing component, the medium pressure in the cavity is increased by the pressurizing component, so that the liquid medicine in the infusion bag is extruded out by the medium, and compared with the existing non-gravity infusion mode, the infusion device can ensure that the liquid medicine output of the infusion bag is uniform and controllable due to the uniform and controllable input of the medium into the cavity.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of a conventional infusion bag;

fig. 2 is a perspective view of an infusion device in accordance with one embodiment of the present invention;

FIG. 3 is another view of the infusion device in accordance with one embodiment of the present invention;

fig. 4 is a schematic view of an internal structure of a housing according to an embodiment of the present invention;

FIG. 5 is an exploded view of an infusion device in accordance with an embodiment of the present invention;

fig. 6 is a cross-sectional view of an infusion device in accordance with one embodiment of the disclosures made herein;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

FIG. 8 is an enlarged view of a portion of FIG. 2 at B;

FIG. 9 is a cross-sectional view of a clamping unit engaged with a compression column according to an embodiment of the present invention;

FIG. 10 is a schematic view of an arm fixing portion disposed on a housing according to an embodiment of the present invention;

FIG. 11 is a diagram illustrating an operation state of an arm fixing portion according to an embodiment of the present invention;

fig. 12 is a cross-sectional view of an infusion device in accordance with a second embodiment of the disclosures made herein;

fig. 13 is a perspective view of an infusion device in accordance with a third embodiment of the disclosures made herein;

fig. 14 is a cross-sectional view of an infusion device as provided by a fourth embodiment of the disclosures made herein.

In the figure: 100-transfusion bag, 110-output port, 200-shell, 201-cavity, 202-output port, 203-sliding hole, 204-medium storage part, 205-first chamber, 206-second chamber, 207-air inlet hole, 210-shell body, 211-sealing gasket, 212-extension section, 213-groove, 220-cover body, 221-process column, 222-pressing column, 230-clamping unit, 231-base block, 232-clamping block, 240-transfusion tube fixing part, 240-side wall, 300-pressurizing component, 310-liquid flow detector, 330-piston, 331-connecting rod, 340-transmission part, 341-first disk, 342-second disk, 400-sealing part, 410-sealing gasket, 510-first elastic part, 520-second elastic part, 600-arm fixing part, 610-isolation pad, 620-bandage, 700-capsule piece, 800-Doppler flowmeter, 900-air bag.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The structure of the conventional infusion bag 100 is shown in fig. 1, and the conventional infusion bag comprises a bag body, wherein a section of hard output port 110 is arranged on the bag body; when the infusion bag is used, the input end of the infusion tube is inserted into the bag body through the output port 110, the output end of the infusion tube is inserted into the vein of a patient, and liquid medicine in the bag body is input into the vein of the patient through the infusion tube under the action of gravity.

Example one

The present embodiment provides an infusion device, as shown in fig. 2 to 4, comprising a housing 200 and a pressurizing assembly; wherein, a closed cavity 201 for containing the infusion bag is arranged in the shell 200, an output hole 202 for the output port of the infusion bag to pass through in a sealing way is arranged on the side wall of the cavity 201, and the cavity 201 is also used for filling medium; the pressurizing assembly 300 is a medium conveying unit capable of inputting a medium into the cavity 201 and/or a squeezing unit capable of compressing the space of the cavity; the infusion bag 100 can output the drug solution through the output port 110 due to the increase of the medium pressure in the cavity 201.

In a simple way, when the infusion device of the embodiment is used, the infusion bag 100 can be placed in the sealed cavity 201 of the housing 200, the output port 110 of the infusion bag 100 extends out through the output hole 202, the infusion tube can be connected between the infusion bag 100 and the vein of the patient in the same existing connection mode, meanwhile, the cavity 201 is filled with a medium, and then the pressurizing assembly 300 increases the pressure of the medium in the cavity 201 to press the infusion bag 100 by the medium, so that the liquid medicine in the infusion bag 100 is infused into the patient through the infusion tube.

Compared with the prior art, when the infusion device of the embodiment is used, the liquid medicine is not contacted with an external device in the whole conveying process, or when the infusion device of the embodiment is used, the conveying process of the liquid medicine is the same as that of the existing gravity infusion mode, the different places are that the existing infusion mode depends on the gravity of the liquid medicine, and the infusion device of the embodiment depends on the pressure of a medium.

In this embodiment, the housing 200 specifically includes a housing body 210 and a cover 220; wherein, the case body 210 is hinged with the cover 220; as shown in fig. 3, the cover 220 can rotate to be fastened with the housing 210 to form a sealed cavity 201; and as shown in fig. 2, the cover 220 is rotated to open the cavity 201 for the infusion bag 100 to be inserted.

That is, the use steps of the housing 200 of the present embodiment are: the cover 220 is opened first, the infusion bag 100 is placed in the cavity 201, the output port 110 of the infusion bag 100 penetrates out of the output hole 202, and then the cover 220 is buckled with the shell 200 to seal the cavity 201.

In the sealing structure between the housing body 210 and the cover 220, reference may be made to the prior art, and one way is as follows: the surface of the housing body 210 is provided with a ring of annular groove, a ring of sealing gasket 211 is arranged in the annular groove, and after the cover body 220 is fastened and fixedly connected with the housing body 210, the housing body 210 and the cover body 220 clamp the sealing gasket 211 to realize sealing of the cavity 201. The structure of the snap-fit connection between the housing body 210 and the cover 220 can refer to the prior art, and is not described herein again.

In the present embodiment, a structure for better sealing between the output hole 202 and the output port 110 is further provided, and specifically, as shown in fig. 5 to 7, an extension section 212 is disposed on an outer side of the housing 200, the output hole 202 is disposed in the extension section 212, a groove 213 is disposed on an end surface of the extension section 212, and an external thread is disposed on an outer circumferential surface of the extension section 212.

A seal 400 is screwed to the extension 212, and a seal 410 is interposed between the bottom surface of the groove 213 and the seal 400.

Based on the above structure, as shown in fig. 7, when the sealing member 400 is unscrewed outward, the sealing ring 410 is contracted and the output port 110 may pass through the output hole 202; when the sealing member 400 is screwed inward, the sealing ring 410 is compressed and expanded, and seals between the sealing ring 410 and the bottom surface of the groove 213, and between the sealing ring 410 and the output port 110, that is, between the output port 110 and the output hole 202.

In order to prevent the infusion bag 100 from shaking in the cavity 210, in this embodiment, a plurality of clamping units 230 are disposed on the bottom surface of the cavity 201 facing the cover 220; each clamping unit 230 includes a base block 231 and a clamping block 232, wherein the clamping block 232 is slidably disposed on the base block 231, and the clamping block 232 can slide to the side of the infusion bag 100 clamped with the base block 231 by receiving the push of the cover 220.

In brief, in this embodiment, after the infusion bag 100 is placed in the cavity 201, the side edge of the infusion bag 100 can be placed between each base block 231 and each clamping block 232; when the cover 220 rotates in a direction of being fastened with the housing body 210, the cover 220 can push each clamping block 232 and the corresponding base block 231 to clamp the side of the infusion bag 100, thereby completing the fixing of the infusion bag 100.

Specifically, referring to fig. 2, 8 and 9, in this embodiment, each base block 231 is fixed on the bottom surface of the cavity 201, and a sliding hole 203 is formed on the top end surface of each base block 231; each clamping block 232 comprises a first side plate and a second side plate which are clamped into an L shape, wherein the first side plate is slidably inserted into the sliding hole 203, and a first elastic element 510 is arranged between the bottom surface of the sliding hole 203 and the bottom surface of the first side plate. In a natural state, the second side plate and the surface of the base block 231 have a space therebetween larger than the thickness of the side of the infusion bag 100, which is pushed by the first elastic member 510.

Referring to fig. 2 and 9, in the present embodiment, a plurality of process pillars 221 are disposed on the bottom surface of the cover 220, guide holes are respectively disposed on the end surfaces of the process pillars 221, a pressing pillar 222 is slidably disposed in the guide hole, and a second elastic member 520 is disposed between the end surface of the pressing pillar 222 and the bottom surface of the guide hole.

Based on the above structure, as shown in fig. 9, when the cover 220 is engaged with the case body 210, the pressing column 222 can abut against the top surface of the clamp block 232 and push the clamp block 232 to slide in a direction approaching the base block 231 until the infusion bag 100 is clamped by the clamp block 232 and the base block 231. Compared with the case that the side edge of the infusion bag 100 is directly clamped by the pressing column 222 and the base block 231, the pressing column 222 may have a lateral displacement during the rotation of the cover 220 toward the housing body 210, which may scratch or cut the infusion bag 100.

In this embodiment, the first elastic member 510 and the second elastic member 520 are both springs.

In this embodiment, referring to fig. 10, an arm fixing part 600 is provided on the housing 200, and the arm fixing part 600 can be connected with the arm of the patient to fix the housing 200 with respect to the arm of the patient.

In brief, the infusion device of the present embodiment can be fixed to the arm of the patient by the arm fixing part 600.

By fixedly arranging the infusion device on the arm of the patient, when the patient is transferred or slightly moves, the infusion device and the infusion tube matched with the infusion device can be well kept fixed relative to the arm of the patient, so that the infusion tube can be prevented from being separated from the arm of the patient, and the stability of infusion can be kept.

In terms of specific structure, referring to fig. 10 and 11, the arm fixing portion 600 of the present embodiment includes a spacer 610 and a plurality of straps 620; wherein, one end of the spacer 610 and one end of the strap 620 are respectively fixedly connected with the shell 200, the spacer 610 is positioned at the inner side of the strap 620, and the other end of the strap 620 can be detachably connected with the shell 200 by bypassing the arm of the patient.

Specifically, when the arm fixing portion 600 of the present embodiment is used, the free end of the strap 620 can be connected to the casing 200 by passing around the arm of the patient, so as to complete the fixing of the casing 200 on the arm of the patient; wherein the free end of the strap 620 wraps around the arm of the patient and the spacer 610 is positioned inside the strap 620 and abuts the arm of the patient.

The arm fixing part 600 of the embodiment can disperse the compression of the bandage 620 on the arm of the patient by arranging the spacer 610 on the inner side of the bandage 620, thereby avoiding the influence on the infusion and reducing the discomfort of the patient.

In this embodiment, a liquid medium, such as water, is stored in the cavity 201; in this case, the infusion device of this embodiment further includes a medium storage portion 204, the medium storage portion 204 is used for storing a liquid medium, the pressurizing assembly 300 is specifically a medium conveying unit used for filling the cavity 201 with the medium, the medium conveying unit is specifically a pump body, an input end of the pump body is communicated with the medium storage portion 204, and the pressurizing member 320 is a conveying pipeline arranged between the pump body and the cavity 201.

That is, when the infusion device of the present embodiment is used, the pump body specifically draws the liquid medium from the medium storage portion 204 and inputs the liquid medium into the cavity 201 through the delivery pipeline, so as to increase the pressure of the medium in the cavity 201.

In this embodiment, the medium storage portion 204 is a capsule disposed on the housing, and the liquid medium is stored in the capsule, and the pump body can pump the liquid medium from the capsule and deliver the liquid medium to the cavity.

Referring to fig. 4, the infusion device of this embodiment further includes a liquid flow sensor 310; wherein, a delivery pipeline is arranged between the output end of the pump body and the cavity 201, and the liquid flow sensor 310 is arranged on the delivery pipeline.

Since the compression of water is negligible, after the cavity 201 is filled with the liquid medium, the flow rate of the medium in the state input into the cavity 201 is equal to the flow rate of the liquid medicine output from the infusion bag 100. In the present embodiment, the liquid flow sensor 310 is arranged to measure the flow rate of the water input into the cavity, and indirectly measure the flow rate of the liquid medicine output from the infusion bag, compared with the prior art in which a contact flow sensor is arranged on the infusion tube, the solution of the present embodiment can avoid the liquid medicine from contacting with the flow sensor, and can avoid the liquid medicine from being polluted; compared with the method of measuring the liquid flow in the infusion tube by adopting a non-contact flow sensor, the scheme of the embodiment has higher measurement precision, and further can more accurately control the flow of infusion.

When the medium storage portion 204 is a capsule, the usage method thereof is, for example: the capsule body is pre-stored with a liquid medium and is separately stored, and the capsule body is specifically an infusion bag filled with the liquid medium. In use, the capsule is fixed relative to the housing 210, for example by gluing the capsule to the housing, and then connecting the input of the pump body to the output of the capsule.

In some embodiments, as shown in fig. 4 and 6, the media storage portion 204 is a storage chamber isolated from the chamber body 201 disposed within the housing 200; and the storage chamber is divided into a first chamber 205 and a second chamber 206 by an elastic bladder 700; the liquid medium is stored in the first chamber 205, and an air inlet 207 is provided on the sidewall of the second chamber 206. The input end of the pump communicates with the first chamber 205.

As a result, the elastic bladder 700 expands toward the first chamber 205, and the pump body can continuously pump the liquid medium from the first chamber 205. In this embodiment, by providing a storage chamber in the cavity 201, compared with the solution of providing a bladder, the solution of this embodiment can conveniently supplement the medium into the first chamber 205, thereby facilitating emergency use thereof.

In this embodiment, referring to fig. 4, an inner wall surface of one sidewall 240 of the cavity 201 is tapered, and a vent hole is formed at a sharp point of the sidewall; the infusion device of the embodiment also comprises a blocking piece which can block the air hole.

By arranging the air holes, the cavity 201 can be filled with the medium through the air holes, and the original air in the cavity 201 is completely extruded through the air holes; the air hole is sealed by a sealing piece to ensure that the cavity 201 is filled with a medium.

Because the air is easily compressed, in this embodiment, the air in the cavity 201 is exhausted by the air holes, and the infusion bag 100 is extruded by the liquid medium, so that the instability of the output flow of the infusion bag 100 caused by the presence of the air in the cavity 201 can be avoided. And through setting up foretell bleeder vent, can be comparatively convenient with gaseous complete discharge.

The infusion device of the embodiment also comprises a control module, a display module and an adjusting module; the display module, the adjusting module, the medium conveying unit and the liquid flow sensor 310 are respectively electrically connected with the control module; the adjusting module can receive external operation and send adjusting signals to the control module, and the control module can respond to the adjusting signals and control the medium conveying unit and the display module to act.

Specifically, in the infusion device of this embodiment, the liquid flow sensor may send the measured liquid flow to the control module, and the control module may control the display module to display the current output flow, and may also display the remaining infusion time, etc.; the staff can also adjust current output flow through the adjusting module.

In some embodiments, an alarm module connected to the control module may be further disposed in the housing 200, and the alarm module may be capable of sending an alarm signal to the outside in response to the control of the control module; for example, after the liquid medicine is output, the control module controls the alarm module to send out an alarm to raise the patient or medical staff.

In some embodiments, an electric heating wire electrically connected to the control module may be further disposed in the cavity 201 to maintain the medical fluid in the infusion bag at a proper temperature.

It should be noted that the control module, the display module, the adjustment module, and the alarm module may all be implemented by existing products, and the detailed principles of implementing the related functions may also refer to the prior art, which is not described herein again.

In this embodiment, a storage battery is further provided in the housing 200 to supply power to the electric devices such as the control module and the medium conveying unit 300. The battery is not shown in the drawings of the present embodiment since it does not affect understanding.

Based on the above structure, the overall working process of the infusion device of the embodiment is as follows:

a preparation stage:

after the worker puts the infusion bag 100 into the cavity 201, the cover 220 is closed;

the air holes are upward, the pump body is opened, the pump body inputs a medium into the cavity 201 until the cavity 201 is full of the medium, and the air holes are closed;

if necessary, the staff fixedly arranges the infusion device on the arm of the patient;

the working stage is as follows:

setting infusion parameters;

one end of the infusion tube is inserted into the infusion bag 100, and the pump body is opened until the liquid medicine flows out from the other end of the infusion tube;

closing the pump body, and inserting the other end of the infusion tube into the body of the patient;

opening the pump body, and infusing liquid medicine into the patient body by the infusion device according to preset parameters;

after the infusion is completed, the cover 220 is opened to discharge the liquid in the cavity 201, and the medium storage part 204 is replenished with the liquid for the next use.

Example two

The present embodiment provides an infusion device, which is substantially the same as the infusion device provided in the first embodiment, except that in the present embodiment, referring to fig. 12, a balloon 900 is fixedly disposed in a cavity 201, an output end of the medium delivery unit is communicated with the balloon 900, a return line is disposed between the balloon 900 and the medium storage portion 204, and a valve body for opening or closing the return line is disposed on the return line.

In brief, in the first embodiment, the medium conveying unit directly fills the medium into the cavity 201 to press the infusion bag 100, whereas in the first embodiment, the medium conveying unit fills the medium into the balloon 900, and the balloon 900 inflates to press the infusion bag through the medium in the cavity 201.

The infusion device of the embodiment is used as follows:

placing the bag 100 in the cavity;

filling the chamber 201 with a liquid medium, such as water;

starting the medium conveying unit, filling the medium conveying unit into the air bag 900, and extruding the infusion bag 100 by the expansion of the air bag 900 through the medium in the cavity 201 to output the liquid medicine in the infusion bag 100;

after the infusion is completed, the valve body on the return line is opened to return the medium in the balloon 900 to the medium storage portion.

As can be seen from the above working process, in the solution of the present embodiment, the medium required by the medium conveying unit can circulate in the air bag 900 and the medium storage portion 204, and compared with the solution of the first embodiment, the solution of the present embodiment can reduce the step of filling the medium into the medium storage portion, and only the medium needs to be filled into the cavity 201 before use, so that the infusion device of the present embodiment is more convenient to use.

In the scheme of the embodiment, the air bag 900 is inflated by filling a medium into the air bag 900, the medium is extruded by the expansion of the air bag 900, and then the infusion bag is extruded by the medium, so that the liquid medicine in the infusion bag is output; since the chamber 201 is filled with the medium in this embodiment, any inflation of the balloon 900 compresses the medium and is transferred from the medium to the bag. Compared with the prior art in which the air bag directly presses the infusion bag, in the prior art, the expansion part of the air bag is used for filling the space of the container, and the output of the infusion bag caused by the expansion of the air bag is unstable.

EXAMPLE III

The present embodiment provides an infusion device, which is substantially the same as the infusion device provided in the first embodiment, except that in the present embodiment, the medium is a gas, and the medium delivery unit is an air pump; the shell is provided with two infusion tube fixing parts which are arranged at intervals, and infusion tubes can be clamped on the two infusion tube fixing parts; the infusion device further comprises a non-contact flow sensor, and the non-contact flow sensor is used for detecting the liquid flow in the infusion tube between the two infusion tube fixing parts.

Referring to fig. 13, the infusion tube fixing part 240 of the present embodiment is annular, and a notch is provided at the tip of the infusion tube fixing part 240, and the infusion port can be engaged with the infusion tube fixing part 240 through the notch. The non-contact flow sensor of the present embodiment is embodied as a doppler flow meter 800.

By arranging the two infusion tube fixing parts 240 and clamping the infusion tube on the two infusion tube fixing parts 240, the fixation of the infusion tube between the two infusion tube fixing parts 240 can be kept, and the Doppler flow meter 800 can conveniently measure the liquid flow in the infusion tube.

It should be noted that the doppler flow meter 800 is a non-contact flow detection device, which can be an existing product, and the usage manner thereof can also refer to the prior art, which is not described in detail herein.

In brief, in the infusion device of this embodiment, the air pump inputs air into the cavity 201, and the air presses the infusion bag 100, so as to output the liquid medicine in the infusion bag 100; the liquid flow in the infusion tube is measured by the Doppler flow meter 800 and then fed back to the control module, and the power of the air pump is adjusted by the control module, so that the liquid flow in the infusion tube reaches a required value.

Compared with the scheme of the first embodiment, the infusion device of the embodiment has a simpler structure. However, since the non-contact flow sensor has a large measurement error and since air is easily compressed, it is difficult to ensure a stable output of the liquid medicine, and the infusion device of the present embodiment is suitable for a situation where the accuracy of the infusion rate is not high.

Example four

The present embodiment provides an infusion device, which is substantially the same as the infusion device provided in the first embodiment, except that in the present embodiment, the squeezing unit includes a motor and a piston slidably disposed in the housing, and the piston is driven by the motor to slide in a direction to reduce the volume of the cavity.

In a simple way, in the infusion device of this embodiment, unlike the above embodiment, the piston is driven by the motor to slide, and the medium in the cavity is pressed by the piston, so that the pressure of the medium is increased, and the medium presses the infusion bag, so that the infusion bag outputs the liquid medicine.

In a specific structure, referring to fig. 14, in the present embodiment, the piston 330 is slidably disposed in the housing 210, and the piston and the housing enclose a cavity 201; the piston 330 is connected to the motor via the transmission member 340, and driven by the transmission member 340, the piston can slide in the housing 210, so that the piston 330 slides in a direction of reducing the volume of the cavity 201, that is, the pressure of the medium in the cavity 201 is increased, and the liquid medicine in the infusion bag 110 is squeezed out by the medium.

In this embodiment, referring to fig. 14, the transmission 340 specifically includes two disks that are coaxially and fixedly connected and are arranged at intervals, and for convenience of description, the disk on the left side of fig. 14 is referred to as a first disk 341, and the disk on the right side of fig. 14 is referred to as a second disk 342; the first disk 341 is coaxially and fixedly connected with a motor shaft of the motor, the second disk 342 is provided with a threaded hole concentric with the second disk 342, the piston 330 is fixedly provided with a connecting rod 331, and the connecting rod 331 is provided with an external thread screwed with the threaded hole, so that when the motor shaft of the motor rotates, the piston can be driven to axially move.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An infusion device, characterized in that: comprises a shell and a pressurizing assembly; the infusion bag packaging device is characterized in that a closed cavity used for containing an infusion bag is arranged in the shell, an output hole used for allowing an output port of the infusion bag to penetrate through is formed in the side wall of the cavity in a sealing mode, and a medium is filled in the cavity;

2. The infusion device as claimed in claim 1, wherein the case includes a case body and a cover body, the case body is hinged to the cover body, and the cover body can rotate to be fastened with the case body to enclose the closed cavity and rotate to open the cavity for the infusion bag to be placed in.

3. The infusion device as claimed in claim 2, wherein a plurality of clamping units are provided on a bottom surface of the cavity opposite to the cover; each clamping unit comprises a base block and a clamping block, the clamping blocks are slidably arranged on the base block, and the clamping blocks can bear the pushing of the cover body and slide to the side edges of the infusion bag clamped by the base blocks.

4. The infusion device as claimed in claim 1, wherein the housing is provided with an arm securing portion that is attachable to an arm of a patient to provide a securement of the housing relative to the arm of the patient.

5. The infusion device as claimed in any one of claims 1 to 4, wherein the medium is a liquid, the infusion device further comprising a medium storage; the medium conveying unit is a pump body, and the input end of the pump body is communicated with the medium storage part.

6. The infusion device as claimed in claim 5, wherein a liquid flow sensor is provided on the delivery line.

7. The infusion device of claim 5, wherein the media storage portion is a bladder fixedly disposed relative to the housing.

8. The infusion device according to any of claims 1 to 4, wherein the medium is a gas and the medium delivery unit is a gas pump;

9. The infusion device as claimed in any one of claims 1 to 4, wherein the compression unit comprises a motor, and a piston connected to the motor and slidably disposed within the housing; and the piston can slide towards the direction that makes the cavity volume reduce under the driving of the motor.

10. The infusion device as claimed in claim 1, further comprising a control module, a display module and an adjustment module; the display module, the adjusting module and the pressurizing assembly are respectively and electrically connected with the control module;