KR20170075356A - Portable infusing device using elastic force and osmotic pressure - Google Patents

Abstract

The portable medicament injector using the elastic force and the osmotic pressure of the present invention comprises a first partition wall dividing the inner space into an inner space and an outer space and a second partition wall dividing the inner space divided by the first partition wall into an inner space and an outer space, A housing; A first port communicating with an outer space partitioned by the first partition of the housing; And a third port communicating with an inner space partitioned by the second partition wall of the housing, wherein the housing corresponds to an outer space of the first partition, and the solvent, which is injected from the outside through the first port, Or a first storage for storing the solution; A second reservoir corresponding to an outer space of the second bank and storing a solvent or a solution having a concentration higher than that of the solvent or the solution stored in the first reservoir; And a third storage part corresponding to an inner space of the second partition and storing medicines injected from the outside through the third port, wherein a first storage part and a second storage part are provided on one side of the first partition, And a semipermeable membrane provided in the form of a porous membrane for selectively passing through the solvent and the solute in the solution stored in the reservoir.
According to the present invention, osmotic pressure due to a concentration difference between a solvent and a solution is used as well as an elastic force by providing an elastic pressure, so that it is possible to provide a high injection pressure by controlling the injection pressure of a drug injected into a human body, have.

Description

TECHNICAL FIELD [0001] The present invention relates to a portable infusion device using an elastic force and an osmotic pressure,

The present invention relates to a portable drug injector using an elastic force and osmotic pressure capable of continuously injecting a drug into a human body.

Generally, a portable drug injector is used when a long-term medication such as an analgesic agent is needed among outpatients, and the drug injector includes a drug reservoir capable of storing a drug and a pump Structure.

Specifically, the drug injector can be classified into an elastic body, a gas and an osmotic pressure depending on the pump structure. In the case of the elastic body, the elastic force (restoring force) of the elastic body increased by the injection of the drug is utilized. The pressure of the gas generated by the difference in the concentration of the two regions is used for the osmotic pressure.

However, in the case of the above-described elastomeric system and gas system, elasticity and chemical reaction energy are influenced by environmental changes such as external temperature and pressure, and physical properties and chemical properties may change over time. Therefore, The speed may vary, and the like.

Particularly, in the case of the elastic body method, as the elastic body structure is restored to its original shape, there is a problem that the injection pressure of the drug is lowered. Since excessive force is applied to the elastic body from the beginning of charging the drug into the drug reservoir, There is a problem.

In addition, in the case of the osmotic pressure method, there is a problem that the injection pressure of the drug drops as the concentration of the drug is diluted, which is not applicable to practical medical devices such as the human body.

Unlike the above-described method, Korean Patent Laid-Open Publication No. 10-2015-0113349 (hereinafter referred to as "prior art") discloses a portable drug injecting apparatus and a drug injecting method.

Specifically, the prior art relates to a drug injection device and a drug injection method that can inject a drug, such as insulin, which is necessarily injected with a certain time, while carrying it.

However, since the related art uses a built-in battery in order to know the time of injecting the medicine through the timer and the notification unit, the energy stored in the battery is consumed, so that it is troublesome to replace or charge the battery.

In addition, the conventional art has a problem in that it is difficult to control the injection amount or the injection rate of the drug injected into the human body, since the composition for adjusting the injection pressure of the drug is insufficient.

It is an object of the present invention to provide a portable drug injector capable of automatically injecting a drug into a human body without using external power and energy.

Another object of the present invention is to provide a portable drug injector that can increase or control the injection pressure of a drug injected into a human body by using elastic force and osmotic pressure together.

In order to achieve the above object, a portable drug injector using elastic force and osmotic pressure according to the present invention comprises a first partition wall dividing an inner space into an inner space and an outer space, and a first partition wall partitioning the inner space divided by the first partition wall into an inner space and an outer space A housing in which the two partition walls are made of an elastic material; A first port communicating with an outer space partitioned by the first partition of the housing; And a third port communicating with an inner space partitioned by the second partition wall of the housing, wherein the housing corresponds to an outer space of the first partition, and the solvent, which is injected from the outside through the first port, Or a first storage for storing the solution; A second reservoir corresponding to an outer space of the second bank and storing a solvent or a solution having a higher concentration than the solvent or the solution stored in the first reservoir; And a third storage part corresponding to an inner space of the second partition and storing medicines injected from the outside through the third port, wherein a first storage part and a second storage part are provided on one side of the first partition, And a semipermeable membrane provided in the form of a porous membrane for selectively passing the solvent and the solute in the solution stored in the reservoir.

According to another aspect of the present invention, there is provided a portable drug injector using an elastic force and an osmotic pressure, comprising a first partition wall dividing an inner space into an inner space and an outer space, and an inner space divided by the first partition wall, A housing having a second partition wall of an elastic material to be divided into an outer portion; A first port communicating with an inner space partitioned by a second partition of the housing; And a third port communicating with an outer space partitioned by the first partition of the housing, wherein the housing corresponds to an inner space of the second partition, and the solvent, which is injected from the outside through the first port, A second reservoir corresponding to an outer space of the second partition and storing a solvent or a solution having a higher concentration than the solvent or the solution stored in the first reservoir; And a third storage part corresponding to an outer space of the first partition and storing a drug injected through the third port from the outside, and a third storage part corresponding to the outer space of the first partition, And a semipermeable membrane provided in the form of a porous membrane for selectively permeating the solvent and the solute in the solution stored in the membrane.

Here, the portable drug injector using the elastic force and the osmotic pressure may further include a second port communicating with the second storage unit and having an opening / closing unit, wherein the second storage unit is injected from the outside through the second port The solvent or the solution is stored.

In addition, the second port is kept closed when the drug stored in the third storage unit is discharged to the outside through the third port.

The first reservoir is characterized in that the solvent or the solution is supplied through the first port by an amount that the drug stored in the third reservoir is discharged through the third port.

In addition, a bubble rejection unit may be provided at one side of the third port to remove bubbles that may occur when the drug stored in the third storage unit is discharged to the outside.

The present invention has the following effects.

First, since it is not necessary to provide a separate structure for using external power or energy, it is possible to simplify the structure, thereby providing convenience in the manufacturing process of the drug injector.

Secondly, by using the elastic force generated when the housing is made of an elastic material and the osmotic pressure generated by the concentration difference of the solvent or the solution stored in the first storage part and the second storage part formed inside the housing, .

Third, since the injection pressure of the drug injected into the human body can be maintained at a high level through structural modification of the third storage part and the second storage part caused by elastic force and osmotic pressure, the efficiency and convenience of drug treatment can be maximized.

1 is a plan view showing schematic components of a portable drug injector using an elastic force and an osmotic pressure according to a first embodiment of the present invention.
2 is a cross-sectional view showing a sectional shape of the housing with reference to the axis of A-A 'in Fig.
3 is a plan view showing components of a portable drug injector using an elastic force and osmotic pressure according to a first embodiment of the present invention.
FIG. 4 is a plan view showing schematic components of a portable drug injector using an elastic force and an osmotic pressure according to a second embodiment of the present invention.
5 is a sectional view showing a sectional shape of the housing with reference to the axis of A-A 'in FIG.
6 is a plan view showing components of a portable drug injector using an elastic force and osmotic pressure according to a second embodiment of the present invention.
FIG. 7 is a graph illustrating the injection pressure of the portable drug injector using the elastic force and osmotic pressure of the present invention over time.

Hereinafter, a detailed description of related art will be omitted if it is determined that the gist of the present invention may be unnecessarily obscured. In addition, numerals (first and second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

In addition, the terms used in the specification and claims should not be construed in a dictionary meaning, and the inventor may, on the principle that the inventor can properly define the concept of a term in order to explain its invention in the best way, And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water and variations may exist.

The preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

< In the first embodiment  Portability using elastic force and osmotic pressure Drug injector  Component Description>

FIG. 1 is a plan view showing schematic components of a portable drug injector using an elastic force and osmotic pressure according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line A-A ' FIG. 3 is a plan view showing the components of a portable drug injector using an elastic force and osmotic pressure according to a first embodiment of the present invention.

1 to 3, a portable drug injector 10 using an elastic force and an osmotic pressure according to a first embodiment of the present invention includes a housing 100 ); A first port 200; A second port 300; And a third port (400).

1 to 3, the housing 100 includes an outer wall 110 and a first partition 120 formed inside the outer wall 110 as a main component of the present invention. And a second barrier rib (130). Here, the outer wall 110, the first bank 120, and the second bank 130 are preferably made of an elastic material or a flexible and stretchable material to provide the elastic force of the present invention.

Specifically, the first barrier rib 120 divides the inner space of the outer wall 110 into inner and outer spaces, and the second barrier rib 130 divides the inner space divided by the first barrier rib 120 into inner and outer spaces . The outer wall 110 connects the one side of the outer wall 110 to one side of the first barrier rib 120 to fix the first barrier rib 120 and the first barrier rib 120 and the second rib 130, And a fixing means for fixing the second partition 130 by connecting one side of the first partition 130 to the second partition 130 may be separately provided.

The first port 200 may be provided on one side of the housing 100 so as to communicate with the outer space partitioned by the first partition 120 of the housing 100 and more specifically, 1 barrier ribs 120, as shown in FIG.

The second port 300 may be provided on one side of the housing 100 so as to communicate with the outer space partitioned by the second partition 130 of the housing 100. More specifically, And the space between the first and second barrier ribs 130 and 130.

The third port 400 may be provided at one side of the housing 100 so as to communicate with the inner space partitioned by the second partition 130 of the housing 100.

In addition, the first port 200, the second port 300, and the third port 400 may include opening and closing means for opening and closing the first port 200, the second port 300, and the third port 400, respectively.

The first storage unit 140, the second storage unit 150, and the third storage unit 160 may be formed in the housing 100. Referring to FIG. 3, The following is an explanation.

The first storage part 140 corresponds to an outer space of the first barrier rib 120 with respect to the first barrier rib 120. In other words, the first storage part 140 corresponds to the space between the outer barrier 110 and the first barrier rib 120 to be. The first storage part 140 is a space in which a solvent or solution injected from the outside through the first port 200 is stored and a pure solvent injected from the outside through the first port 200 is preferably stored .

The second storage unit 150 corresponds to the space between the first barrier rib 120 and the second barrier rib 130, which corresponds to the outer space of the second barrier rib 130. The second storage unit 150 is a space in which a solvent or a solution having a concentration higher than that of the solvent or the solution stored in the first storage unit 140 is stored and the solution injected from the outside through the second port 300 is stored .

The first storage part 140 and the second storage part 150 may contain a solvent and a solvent in the first storage part 140 and the second storage part 150, And a semipermeable membrane 121 provided in the form of a porous membrane for selectively passing the solute. As shown in FIG. 3, the osmosis phenomenon occurs in which the solvent stored in the first storage part 140 or the solvent in the solution moves to the second storage part 150 through the semipermeable membrane 121. That is, since the solvent or the solution stored in the first storage part 140 is relatively low in concentration compared with the solvent or the solution stored in the second storage part 150, the semipermeable membrane 121 provided on one side of the first bank 120, This osmotic phenomenon occurs through

The third storage part 160 corresponds to the inner space of the second partition 130 and is a space in which drugs injected through the third port 400 are stored from the outside. That is, the innermost space of the housing 100 is formed with the third storage unit 160, the outermost space of the housing 100 is formed with the first storage unit 140, the third storage unit 160, The second storage unit 150 is formed between the first storage unit 140 and the second storage unit 150. Here, the drug stored in the third storage unit 160 is released to the outside through the third port 400, and the released drug is injected into the human body.

In addition, it is preferable that the bubble rejection unit 410 is provided at one side of the third port 400 to remove bubbles that may occur when the drug stored in the third storage unit 160 is discharged to the outside. This is because when the drug is injected into the human body including the bubbles therein, the blood vessel may be damaged. In addition, the bubbling rejection unit 410 may include a gas permeable semipermeable membrane (not shown) which is not permeable to the drug and permeable to only gas, and a bubble discharging opening (not shown) separately provided for discharging the permeated gas to the outside .

In addition, since the third port 400 generates a high osmotic pressure due to a difference in concentration of a solvent or a solution stored in the first storage unit 140 and the second storage unit 150, (Not shown) for keeping the flow rate of the drug to be constant. This resistance means is provided in the form of a narrow tube, thereby contributing to maintaining a proper pressure and a constant flow rate for the drug released to the outside through the third port 400.

In addition, a flow rate regulator (not shown) may be provided on one side of the resistor means. The flow rate regulator may be provided to press the drug discharged through the resistor means to reduce the resistance of the third port 400 So that a large amount of drug can be temporarily released to the outside and injected into the human body.

< In the second embodiment  Portability using elastic force and osmotic pressure Drug injector  Component Description>

FIG. 4 is a plan view showing a schematic constituent element of a portable drug injector using an elastic force and osmotic pressure according to a second embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along the line A-A ' And FIG. 6 is a plan view showing components of a portable drug injector using an elastic force and osmotic pressure according to a second embodiment of the present invention.

Referring to FIGS. 4 to 6, components of the portable drug injector 20 using the elastic force and osmotic pressure according to the second embodiment of the present invention will be described. The portable drug injector 20 using the elastic force and the osmotic pressure comprises a housing 500 ); A first port 800; A second port 700; And a third port (600).

4 to 6, the housing 100 includes an outer wall 510 and a first partition 520 formed inside the outer wall 510, which form the overall outer shape of the housing 100 as a main constituent of the present invention. And a second barrier rib 530. Here, the second partition 530 may be formed of an elastic material or a flexible and stretchable material to provide the elastic force of the present invention to the outer wall 510 and the first partition 520.

Specifically, the first partition 520 separates the inner space of the outer wall 510 from the inner space and the outer space, and the second partition 530 separates the inner space divided by the first partition 520 from the inner space and the outer space . The outer wall 510 connects the one side of the outer wall 510 and one side of the first barrier rib 520 to fix the first barrier rib 520. The outer side of the first barrier rib 520 and the second barrier rib 530, And a fixing means for fixing the second partition 530 by connecting one side of the second partition 530 may be separately provided.

The first port 800 may be provided at one side of the housing 500 to communicate with an inner space partitioned by the second partition 530 of the housing 500.

The second port 700 may be provided on one side of the housing 500 so as to communicate with the outer space partitioned by the second partition 530 of the housing 500. More specifically, And the second barrier ribs 530, as shown in FIG.

The third port 600 may be provided on one side of the housing 100 so as to communicate with the outer space partitioned by the first partition 520 of the housing 500 and more specifically, 1 barrier ribs 520. [0052] As shown in FIG.

In addition, the first port 800, the second port 700, and the third port 600 may include opening and closing means for opening and closing the first port 800, the second port 700, and the third port 600, respectively.

The first storage unit 560, the second storage unit 550, and the third storage unit 540 may be formed in the housing 500. Referring to FIG. 6, The following is an explanation.

The first storage unit 560 corresponds to the inner space of the second partition 530 with respect to the second partition 530. The first storage part 560 is a space in which a solvent or solution injected from the outside through the first port 800 is stored and a pure solvent injected from the outside through the first port 800 is preferably stored .

The second storage unit 550 corresponds to an outer space of the second partition 530, that is, a space between the first partition 520 and the second partition 530. The second storage unit 550 is a space in which the solvent or the solution having a concentration higher than that of the solvent or solution stored in the first storage unit 560 is stored and the solution injected from the outside through the second port 700 is stored .

The first storage part 560 and the second storage part 550 are partitioned into a first storage part 560 and a second storage part 550. The first and second storage parts 560, And a semipermeable membrane 531 provided in the form of a porous membrane for selectively passing the solute. As shown in FIG. 6, osmosis phenomenon occurs in which the solvent stored in the first storage portion 560 or the solvent in the solution moves to the second storage portion 550 through the semipermeable membrane 531. That is, since the solvent or the solution stored in the first storage part 560 is relatively low in concentration compared to the solvent or the solution stored in the second storage part 550, the semipermeable membrane 531 provided on one side of the second partition wall 530, This osmotic phenomenon occurs through

The third storage unit 540 corresponds to an outer space of the first partition 520, that is, a space between the outer wall 510 and the first partition 520. The third storage unit 540 is a space in which drugs injected from the outside through the third port 600 are stored. That is, the outermost space of the housing 500 is formed with the third storage unit 540, the innermost space of the housing 500 is formed with the first storage unit 560, the third storage unit 540, And a second storage unit 550 is formed between the first storage units 560. Here, the drug stored in the third storage unit 540 is discharged to the outside through the third port 600, and the released drug is injected into the human body.

In addition, it is preferable that the bubble eliminating unit 610 is provided at one side of the third port 600 to remove bubbles that may occur when the medicine stored in the third storing unit 540 is discharged to the outside. This is because when the drug is injected into the human body including the bubbles therein, the blood vessel may be damaged. In addition, the bubbling agent rejection unit 610 may include a gas permeable semipermeable membrane (not shown) which is not permeable to the drug and permeable only to the gas, and a bubble discharging opening (not shown) separately provided for discharging the permeated gas to the outside .

In addition, since the third port 600 generates high osmotic pressure due to the concentration difference of the solvent or the solution stored in the first storage part 560 and the second storage part 550, (Not shown) for keeping the flow rate of the drug to be constant. This resistance means is provided in the form of a narrow tube so as to contribute to maintaining a proper pressure and a constant flow rate for drugs discharged to the outside through the third port 600.

In addition, a flow rate regulator (not shown) may be provided at one side of the resistor means. The flow rate regulator may be provided to press the drug discharged through the resistor means to reduce the resistance of the third port 600 So that a large amount of drug can be temporarily released to the outside and injected into the human body.

<Portability using elasticity and osmotic pressure Drug injector  Drug injection principles and At the injection pressure  Description>

FIG. 7 is a graph illustrating the injection pressure of the portable drug injector using the elastic force and osmotic pressure of the present invention over time.

Hereinafter, with reference to FIG. 7, a correlation (principle) of an elastic force and an osmotic pressure for injecting a drug through the portable drug injector 10 and 20 using the elastic force and osmotic pressure of the present invention, Will be described in detail.

First, the drugs stored in the third storage units 160 and 540 are discharged to the outside through the third ports 400 and 600 and injected into the human body. Here, since the drugs stored in the third storage units 160 and 540 are injected into the human body due to the elastic force, the initial injection pressure is inevitably lowered over time. In order to keep the initial injection pressure constant over time, the osmotic pressure generated by the difference in the concentration of the solvent or the solution stored in the first storage part 140, 560 and the second storage part 150, The units 150 and 550 press the third storage units 160 and 540.

That is, when the drug is injected into the third storage units 160 and 540, the second barrier ribs 130 or the first barrier ribs 520 are inflated and the elastic force of the second barrier ribs 130 or the first barrier ribs 520 As the drug is released to the outside, the drug is injected into the human body, and the injection pressure of the drug drops over time. For this reason, the present invention is a principle that utilizes the osmotic pressure generated through the first reservoir 140, 560 and the second reservoir 150, 550 to supplement the injection pressure of the drug to maintain a constant injection pressure.

The outer wall 110 surrounding the first storage units 140 and 560 is provided with a plate that is not deformed so that the osmotic pressure generated in the second storage units 150 and 550 can be efficiently supplied to the third storage units 160 and 540 ).

The second ports 300 and 700 having the opening and closing means for appropriately providing the osmotic pressure as described above to the third storage units 160 and 540 may be stored in the third storage unit 160 and 540, It is preferable that the drug stored in the first and second ports 160 and 540 is released to the outside through the third port 400 and 600 and is kept closed when the drug is injected into the human body.

The first storage units 140 and 560 are connected to the first ports 200 and 800 through the third ports 400 and 600 in such a manner that drugs stored in the third storage units 160 and 540 are discharged through the third ports 400 and 600, ) To supply the solvent or the solution.

Therefore, the portable drug injectors 10 and 20 using the elastic force and the osmotic pressure of the present invention can maintain the injection pressure of the drug constant.

On the other hand, as shown in the following equations (1) to (3) and (7), the relationship between the elastic force and the osmotic pressure of the portable drug injector using the elastic force and osmotic pressure of the present invention, The results were analyzed.

The flow rate of the drug of the present invention can be determined by the flow rate or volume of the initial drug, the amount or volume of the solution stored in the second storage part 150, 550, the amount of the first storage part 140, 560, Which generates the difference in the concentration of the solvent or the solution in the first and second storage units 150 and 550, the amount or flow rate of the solvent injected into the first storage units 140 and 560, the resistance and the osmotic pressure of the third ports 400 and 600, The resistance of the electrodes 121 and 531, and the like.

That is, the injection pressure in Equation (1) is determined by the volume (amount) of the initial drug and the volume (amount) of the solution. Compliance (inversion of elasticity) is determined by the outer wall 110, And the elastic modulus of the barrier ribs 120 and 520 or the second barrier ribs 130 and 530.

Also, as can be seen from Equation (2), the amount of drug released into the third storage units 160 and 540 is determined by the injection pressure and the resistance of the third port 400 and 600. Accordingly, the release rate at which the drug stored in the third storage units 160 and 540 is discharged to the outside through the third ports 400 and 600 can be predicted.

In Equation (3), the amount of the solvent injected into the second storage portion 150, 550 is determined by the osmotic pressure, the injection pressure, and the resistance of the semipermeable membrane 121, 531. The speed of the solvent stored in the first storage part 140 or 560 or the solvent in the solvent can be predicted through the semipermeable membrane 121 or 531 into the second storage part 150 or 550.

As shown in FIG. 7, when the flow rate of the drug and the flow rate of the solvent in Equations 2 and 3 are set to be similar to each other, it is found that the injection pressure of the drug is maintained constant over time considering the change of elastic force and osmotic pressure have. Here, A in Fig. 4 represents the injection pressure, B represents the amount of the solution, and C represents the amount of the drug. That is, since the amount of drug (C) decreases and the elastic force decreases, but the amount of solution (B) increases by the amount of the decreased drug (C), osmotic pressure is generated. It can be kept constant.

Therefore, the portable drug injectors 10 and 20 using the elastic force and the osmotic pressure of the present invention can inject drugs at a constant rate to the human body, thereby maximizing the efficiency and convenience of drug treatment.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. And the scope of the present invention should be understood as the scope of the following claims and their equivalents.

Description of the Related Art [0002]
10, 20: Portable drug injector using elastic force and osmotic pressure
100, 500: housing
110, 510: outer wall
120, 520: first partition
121: Semipermeable membrane
130, 530: second partition
531: Semipermeable membrane
140, 560: a first storage unit
150, 550: second storage unit
160, 540: a third storage unit
200, 800: First port
300, 700: second port
400, 600: Third port
410, 610: Foam rejection

Claims (6)

A housing having a first partition wall of an elastic material for partitioning an inner space into an inner space and an outer space and a second partition wall dividing the inner space divided by the first partition into inner and outer spaces;
A first port communicating with an outer space partitioned by the first partition of the housing; And
And a third port communicating with an inner space partitioned by the second partition of the housing,
The housing includes:
A first reservoir corresponding to an outer space of the first partition and storing a solvent or a solution injected from the outside through the first port;
A second reservoir corresponding to an outer space of the second bank and storing a solvent or a solution having a concentration higher than that of the solvent or the solution stored in the first reservoir; And
And a third storage unit corresponding to the inner space of the second partition and storing medicines injected from the outside through the third port,
And a semipermeable membrane provided on one side of the first bank to form a porous membrane for selectively permeating the solvent and the solute in the solution stored in the first and second reservoirs.
Portable drug injector using elastic force and osmotic pressure.
A housing having a first partition wall dividing an inner space into an inner space and an outer space and a second partition wall made of an elastic material for partitioning the inner space divided by the first partition into inner and outer spaces;
A first port communicating with an inner space partitioned by a second partition of the housing; And
And a third port communicating with an outer space partitioned by the first partition of the housing,
The housing includes:
And a first storage unit corresponding to the inner space of the second partition and storing a solvent or solution injected from the outside through the first port,
A second reservoir corresponding to an outer space of the second bank and storing a solvent or a solution having a concentration higher than that of the solvent or the solution stored in the first reservoir; And
And a third storage unit corresponding to an outer space of the first partition and storing medicines injected from the outside through the third port,
And a semipermeable membrane provided on one side of the second partition wall in the form of a porous membrane for selectively passing through the solvent and the solute in the solution stored in the first reservoir second reservoir.
Portable drug injector using elastic force and osmotic pressure.
3. The method according to claim 1 or 2,
The portable drug injector using the elastic force and the osmotic pressure,
And a second port communicating with the second storage unit and having opening / closing means,
And the second storage unit stores a solvent or a solution injected from the outside through the second port.
Portable drug injector using elastic force and osmotic pressure.
The method of claim 3,
Wherein the second port maintains the closed state when the drug stored in the third reservoir is discharged to the outside through the third port.
Portable drug injector using elastic force and osmotic pressure.
3. The method according to claim 1 or 2,
Wherein the first reservoir is supplied with a solvent or a solution through the first port by an amount such that the drug stored in the third reservoir is discharged through the third port
Portable drug injector using elastic force and osmotic pressure.
3. The method according to claim 1 or 2,
And bubbles rejection is provided at one side of the third port to remove bubbles that may occur when the drug stored in the third reservoir is discharged to the outside.
Portable drug injector using elastic force and osmotic pressure.

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