JPH08726A - Fluid transporter - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a fluid transporter suitable for carrying. A pressure generating part having a gas generating part and a pressure transmitting part, and a fluid ejecting part are provided, and the gas generating part switches a first electric circuit, a second electric circuit and energization to these circuits. A changeover switch, the first electric circuit has a power supply section and an electrochemical cell section, the second electric circuit has a power supply section and a signal section for notifying a fluid supply stop, and the pressure transmission section is The pressure transmission unit has a main body, a moving body, and an opening, and the moving body is arranged so as to be movable by the pressure of gas and capable of opening and closing the opening. And a fluid extruding body for ejecting the fluid stored in the ejecting section main body by pressing the moving body, and a changeover switch depending on the pressure of the gas discharged from the opening at the same time when the fluid discharge is completed. To activate the second circuit from the first circuit. Switching the energization to the circuit, informing the ejection operation emits a fluid supply stop signal from the signal unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid transporter for supplying a small amount of fluid with high precision by utilizing an electrochemical system, and more particularly to a signal for notifying the end point of the fluid transporter. It is related to the mechanism that emits.

[0002]

2. Description of the Related Art In recent years, an electrochemical system has come to be used for an infusion pump for injecting a small amount of a liquid medicine into a human body with high accuracy.

A device has been proposed which utilizes an electrochemical cell for generating a gas when a direct current is applied, and which simultaneously performs a pump function and a gas flow rate control (Japanese Patent No. 1214001). In recent years, various electrochemical infusion pumps utilizing this principle have been proposed, and when a direct current is applied to the electrochemical cell section, this method uses a gas generated in proportion to the amount of electricity supplied to generate a chemical solution. Push it out.

H. J. R. Magget's proposal (US Pat. No. 4,522,698) has an electrochemical cell in which porous gas diffusion electrodes are bonded to both sides of a water-containing ion exchange membrane functioning as an electrolyte. When hydrogen is supplied to the anode of, and a direct current is applied between the positive and negative electrodes, hydrogen becomes hydrogen ions at the anode, and the generated hydrogen ions pass through the ion exchange membrane to reach the cathode side, where hydrogen is generated. It utilizes the fact that the electrochemical reaction occurs. That is, the pressurized hydrogen generated at the cathode is used as a drive source for pushing out the piston, diaphragm, bellows and the like. It is also possible to use oxygen instead of hydrogen as a reaction substance of this electrochemical cell, and if air is used as an oxygen source to be supplied to the cathode, the structure of the infusion pump becomes considerably simple.

Further, as an improved type of this electrochemical infusion pump, a method of utilizing the electrolysis reaction of water (Japanese Patent Laid-Open No. HEI-2)
-302264) is proposed, in which the cathode is bonded to one surface of the ion exchange membrane and the anode is bonded to the other surface, or the cathode and the anode are separated on one surface so as to be insulated from each other and bonded integrally. The electrochemical cell
Hydrogen or oxygen, which is generated by electrolysis of water when a direct current is applied to both electrodes, or a mixed gas of hydrogen and oxygen is used as a pressure source of an infusion pump.

[0006] The operating principle of an infusion pump of the type that discharges a target fluid such as a drug solution by pushing the sucker of an injector using an electrochemical system is that Faraday's law is applied when a direct current is applied to the electrochemical cell. Therefore, a gas such as oxygen or hydrogen is generated in proportion to the amount of electricity supplied, so the pressure of this gas pushes the moving body in the pressure transmission unit, and then the moving body pushes the sucker of the syringe to achieve the purpose of the drug solution. To eject the fluid. The amount of gas generated at this time can be controlled very precisely by the amount of electricity (current x time) applied to the electrochemical cell section, and the amount of gas generated and the discharge amount of the target fluid such as a chemical solution have a proportional relationship. Therefore, this type of infusion pump is characterized in that the discharge amount of a target liquid such as a chemical liquid can be accurately determined. Such an electrochemical method can be used not only for an infusion pump that discharges a chemical solution or the like but also for a fluid transporter that discharges or supplies any fluid including a liquid or a gas.

[0007]

A direct current is applied to the electrochemical cell, and the gas generated at this time pushes the moving body inside the pressure transmitting body, and then the moving body pushes the sucker of the syringe.
In a fluid transporter that uses an electrochemical method such as discharging a target fluid, even if the fluid in the syringe is exhausted, gas will continue to be generated and gas will continue to be pushed as long as a direct current is applied to the electrochemical cell. It is conceivable that the pressure of the gas in the main body of the pressure transmitting unit rises and the pressure transmitting unit or the syringe is damaged.

Therefore, it is necessary to have a function of notifying the "end of discharge" at the same time as cutting off the direct current flowing in the electrochemical cell when the discharge of the target fluid is completed, but the conventional electrochemical method is used. In the fluid transporter described above, no function is added by such a simple method. Normally, a timer is used to cut off the current flowing in the electrochemical cell, and at the same time, it is sufficient to send a current to the circuit that issues a signal to notify "end of discharge", but with this method, the timer itself becomes large, and There is a problem in the complexity of use such that the timer has to be set every time the transporter is used.

Further, the conventional infusion pump using an electrochemical cell has a shape in which an electrochemical cell as a pressurizing source and a syringe are integrated, and for hygiene reasons, the syringe is used only once. In that case, even though only the syringe needs to be replaced, the electrochemical cell that can be used repeatedly must also be replaced at the same time.

Therefore, the present invention has been made to solve the above problems of the electrochemical type infusion pump, and its purpose is to have a simple structure and easy operation during use. Moreover, it is to provide a fluid transporter that can be made smaller and lighter and that is suitable for carrying.

[0011]

An electrochemical fluid transporter according to the present invention comprises a pressure generating section and a fluid ejecting section,
The pressure generating unit and the fluid discharge unit have a removable structure, the pressure generating unit has a gas generating unit and a pressure transmitting unit, and the gas generating unit has a first electric circuit and a second electric circuit. And a changeover switch for switching the energization of these circuits, the first electric circuit has a power supply section and an electrochemical cell section for generating gas by energizing a direct current, the second, The electric circuit has a power supply unit and a signal unit for notifying the supply of fluid, and the pressure transmission unit includes a pressure transmission unit main body for transmitting gas pressure, a movable body provided inside the pressure transmission unit main body, and a pressure transmission unit main body. The moving body has an opening communicating with the inside and the outside, the moving body is arranged so as to be movable by the pressure of gas, and the opening can be opened and closed. By pressing the body and the discharge port for supplying fluid and the moving body And a fluid extruding body for discharging the fluid stored in the ejecting section main body, a direct current is passed through the first electric circuit by a changeover switch, and the gas pressure generated from the electrochemical cell section is moved by the moving body. , Fluid extrudate,
The target fluid is discharged, the target fluid is discharged, and the opening of the pressure transmitter body is opened by the movement of the moving body. At the same time that the current flowing is cut off, a current is passed through the second electric circuit, and a signal supply stop signal is issued from the signal section,
By setting the pressure Q required to move the moving body inside the pressure transmitting unit main body to a value larger than the maximum value of the pressure P required to push the fluid extruding body of the fluid ejection unit, P Even if the values of the above are different, it is possible to obtain the target discharge amount of the fluid by controlling only the moving speed of the moving body with the gas generated from the electrochemical cell.

Furthermore, the electrical connection to the first circuit having the power supply section and the electrochemical cell section and the electrical connection to the second circuit having the power supply section and the signal section are switched by a changeover switch. Therefore, when the target fluid is discharged after the start of use, an electric current flows through the first circuit, and when the target fluid is discharged, the branch conduit attached to the main body of the pressure transmission unit. The pressurized gas in the pressure transmitting unit main body flowing out from the outlet of the switch operates the changeover switch, and the current flows to the second circuit, and at the same time the current to the first circuit is cut off.

Therefore, the generation of gas from the electrochemical cell is stopped, and a signal indicating the end of discharge of the target fluid can be emitted.

As the electrochemical cell portion which can be used in the present invention, in general, any cell can be used as long as it produces a gas in proportion to the amount of electricity applied when a direct current is applied.
More specifically, the following cells can be used.

1) Porous metal electrodes are bonded to both sides of a solid polymer cation exchange membrane, both electrodes are in contact with water, and oxygen is generated from the anode or hydrogen is generated from the cathode or oxygen and hydrogen when electricity is applied. The mixed gas of is used. In addition, in such a water electrolysis cell, it is common to prefill water on both the anode side and the cathode side. However, since the solid polymer ion exchange membrane can absorb a large amount of water inside, it functions as an electrolyte by exhibiting a proton conductive function, and therefore water is not necessarily used on both the anode side and the cathode side. It is not necessary to put water in, and water may be put in only one of the electrodes. That is, if water is required for the electrode reaction, water is supplied from the opposite electrode side through the solid polymer ion exchange membrane.

2) Porous metal electrodes are bonded to both sides of the solid polymer cation exchange membrane, the anode is in contact with water, and the cathode is in contact with air or oxygen, and oxygen generated from the anode by energization is used.

3) A porous metal electrode serving as an anode is joined to one surface of the solid polymer cation exchange membrane, and manganese dioxide serving as a cathode is attached to the other surface of the solid polymer cation exchange membrane to utilize oxygen generated from the anode by energization.

4) A porous metal electrode as an anode is joined to one side of the solid polymer anion exchange membrane, and manganese dioxide or nickel oxyhydroxide as a cathode is attached to the other side.
Oxygen generated from the anode by energization is used.

5) Instead of using an ion exchange membrane as an electrolyte, water is electrolyzed using an acidic or alkaline electrolytic solution, and oxygen or hydrogen generated at that time or a mixed gas of both is used.

[0020] 6) without using the ion-exchange membrane as the electrolyte, molybdophosphoric acid _{(H 3 PMo 12 O 40 ·} 29 H 2 O), uranyl acid _{(HUO 2 PO 4 · 4H 2} O), antimonate _(Sb 2 _{O 5} 4H ₂ O) or the like is used to electrolyze water using various inorganic proton conductors, and oxygen or hydrogen generated at that time, or a mixed gas of both is used.

[0021]

The operation of the fluid transporter using the electrochemical method according to the present invention will be described with reference to FIG. In FIG.
Reference numeral 1 is a pressure generating portion, 2 is a fluid ejection portion, and a syringe is used here. The pressure generating unit 1 is composed of a gas generating unit 3 and a pressure transmitting unit 4. In addition, the gas generator 3
Has a power supply unit 5, an electrochemical cell unit 6, a signal unit 7, and a changeover switch 8. The pressure transmission unit 4 is composed of a pressure transmission unit main body 9 and a moving body 10.

Reference numeral 12 is an O-ring attached to the moving body, and 13
Is an opening communicating between the inside and the outside of the pressure transmitting unit main body, and here, a branch conduit 11 for guiding and discharging the gas discharged to the opening 13 is provided. 14 is an outlet of the branch conduit, 15 is water, 16 is a gas generated from the electrochemical cell, 17 is a sucker of a syringe which is a fluid extruding body, 18 is a fluid extruding body, that is, a head end of the sucking body, It means one end of the fluid extruding body to be inserted into the main body and the opposite end.

Reference numeral 19 denotes an injection unit body, that is, an outer cylinder of a syringe,
Reference numeral 20 is a fluid to be discharged, 21 is a fluid discharge port, and 22 is a mounting base for fixing the whole. The outlet 14 of the branch conduit of the pressure transmission unit faces the changeover switch 8, and the electric circuit of the gas generation unit 3 is a first electric circuit having a power supply unit 5 and an electrochemical cell unit 6 by the changeover switch 8. To the second electrical circuit having the power supply section 5 and the signal section 7 can be selected. The power supply unit 5 uses a combination of a DC power supply such as a dry battery and a constant resistance.

In using the fluid transporter according to the present invention, a required amount of a fluid 20 to be discharged, such as a drug solution, is put in the syringe 2 in advance in a required amount,
One end of the moving body 10 of the pressure transmission unit 4 and the head end 18 of the sucker 17 of the syringe are kept in contact with each other as shown in FIG. At this time, the positional relationship between the moving body 10 of the pressure transmission unit 4 and the syringe 2 is such that the sucker 17 of the syringe 2 is completely pushed into the inside of the outer cylinder 19 and the discharge of the target fluid 20 to be discharged is completed. It is set so that the moving body 10 moves to a position where the opening 13 provided in the pressure transmitting portion main body 9 opens when the moving body 10 moves to the position.

In using the fluid transporter, the changeover switch 8 electrically connects the first circuit having the power source section 5 and the electrochemical cell section 6, and a direct current is applied to the first circuit. Gas is generated from the electrochemical cell unit 6, and this gas accumulates in the portion of the pressure transmission unit main body 9 where the water 15 has entered. The pressure of the gas 16 pushes the moving body 10 in the direction of the arrow. At this time, the moving distance of the moving body 10 is determined by the volume of the generated gas. This pressure is transmitted to the sucker 17 of the syringe 2, the sucker 17 of the syringe moves in the direction of the arrow to push out the target fluid 20, and the target fluid 20 is discharged from the fluid discharge port 21.

When the sucker 17 of the syringe is completely pushed into the outer cylinder 19 and the target fluid 20 is completely discharged, the opening 13 closed by the moving body 10 is opened, and the pressure transmitting portion is opened. The pressurized gas inside the body is the opening 1
From 3 into the branch conduit. The gas that flows in is discharged from the outlet 14 of the branch conduit, the changeover switch 8 is activated by the pressure of this gas, and the current flowing in the first circuit is cut off, and the second circuit having the power supply unit 5 and the signal unit 7 is also provided. Current flows through. By energizing the second circuit, if a buzzer or the like is used as the signal unit 7, it is possible to notify "end" by sound, or if a lamp is used as the signal unit 7, the lamp is turned on and the eye is turned on. You can tell "end" with.

After use, the pressure transmitting section 4 of the pressure generating section 1 and the syringe section 2 are separated, only the syringe is replaced, and the gas accumulated in the pressure transmitting section 4 is removed. Can be used repeatedly as many times as desired.

Although a chemical liquid is usually considered as a fluid to be supplied, the use of the fluid transporter of the present invention is not limited to the infusion of a chemical liquid, and supply of any fluid such as liquid or gas. It goes without saying that it can be used for.

[0029]

【Example】

[Embodiment 1] Hereinafter, a fluid transporter according to the present invention will be described in detail with reference to the drawings showing an embodiment.

The structure of the fluid transporter according to the present invention is the same as that shown in FIG. 1, and here a chemical liquid is used as the liquid 20 to be discharged. Gas generator 3
As the electrochemical cell part 6, a commercially available Nafion 117 membrane (solid polymer cation exchange resin membrane) having a diameter of 12 mm is used for the electrolyte, and porous platinum having a diameter of 8 mm is formed on both sides of the Nafion 117 membrane by electroless plating. The electrodes are joined together, and the anode and cathode are both in contact with water, and the diameter is 25 m.
The disk type was m and had a height of 10 mm. As the gas used for pressurization, oxygen generated from the anode by energization is used,
As the power supply unit 5, a commercially available 3V class lithium battery and a constant resistance were used in combination. The electrochemical cell part is made of polypropylene and has an outer diameter of 16 mm, an inner diameter of 12 mm, and a length of 75 mm.
The cylinder was attached by heat welding, and this was used as the pressure transmitting portion main body 9 so that the gas generating portion 3 and the pressure transmitting portion 4 were integrated.

Inside the pressure transmitting portion main body 9 is a cylindrical moving body 1 made of polypropylene and having a diameter of 11 mm and a length of 70 mm.
0, and three O-rings 12 are attached by grooving in the circumferential portion of the moving body 10 near the electrochemical cell portion 6, and when a pressure of 2.5 atmospheric pressure is applied to the moving body 10. The moving body 10 can move smoothly inside the pressure transmitting unit main body 9. The syringe side of the moving body 10 was brought into close contact with the head end portion 18 of the sucker 17 of the syringe 2. As the syringe 2,
Outer cylinder part diameter 15mm, length about 60mm, internal volume 5m
1 commercially available plastic was used.

The constant resistance used for the power supply unit 5 is 240 ohms, and the changeover switch 8 is switched so that the first circuit having the power supply unit 5 and the electrochemical cell unit 6 is electrically connected. When a direct current is applied to the electrochemical cell 5, a current of about 12.5 mA flows in the electrochemical cell 5, so that 2.5 ml of oxygen at 25 degrees Celsius and 1 atm per hour is generated. Become. When this oxygen 16 accumulates in the portion of the water 15 in FIG. 1, the pressure of the oxygen pushes the moving body 10, and this pressure is sequentially transmitted from the moving body 10 to the sucker 17 of the syringe and further to the drug solution 20, and from the fluid discharge port 21. 1 ml of the chemical solution was discharged per hour.

The pressure of the gas 16 generated from the electrochemical cell section 6 causes the moving body 10 to move inside the pressure transmitting section main body 9 from left to right in FIG. Then, when the moving body 10 reaches the position as shown in FIG. 2, the sucker 17 is completely pushed into the outer cylinder 19 of the syringe, and the discharge of the medicinal solution is completed, the inside and the outside of the pressure transmitting unit main body. The pressurized gas in the main body of the pressure transmitting part flows into the branch conduit 11 attached to the opening communicating with the gas, the gas is discharged from the outlet 14 of the branch conduit, and the changeover switch 8 is activated by the pressure of the gas. . At this time, if the circuit configuration is such that the current flowing in the first circuit is cut off and the current flows in the second circuit having the power supply section 5 and the signal section 7, the target fluid 20 inside the syringe 2 will be An electric current flows through the signal portion at the time of complete ejection, and if a buzzer is used as the signal portion 7, it is possible to notify "end" by sound.

FIG. 3 is a view showing an embodiment of the changeover switch. 3a to 3d show a series of operating states of the changeover switch.

FIG. 3a shows the changeover switch without the fluid transporter. In FIG. 3a, 11 is a branch conduit and 14 is an outlet of the branch conduit. 32 is a plastic push button, 33 is an iron ring attached to the periphery of the outlet 14 of the branch conduit,
Reference numeral 34 is an iron terminal. Reference numeral 31 is a thin iron plate composed of a magnet, one end of which is pivotally supported so as to come into contact with the iron ring 33 or the iron terminal 34 when rotated. The material of the thin iron plate 31 may be any magnetic material having conductivity, and the shape is not limited to this. Further, the iron ring 33 and the iron terminal 34 may be any as long as they have conductivity,
If metal having conductivity is used, in addition to iron, copper,
A ring made of iron, which can be gold, platinum, or an alloy. 3
3 or the shape of the terminal 34 made of iron, the thin iron plate 3 is rotated to rotate.
Any shape may be used as long as the 1 is surely contacted. However,
It goes without saying that the respective shapes must have consistency at least in the portions in contact with each other so that the contact between the thin iron plate 31 and the iron ring 33 or the contact with the iron terminal 34 is good. Absent.

The iron ring 33 and the iron terminal 34 may be made of a conductive magnetic material, and the thin iron plate 31 may be made of a conductive material.

The ring 33 is electrically connected to a first circuit 35 having a power source section and an electrochemical cell section, and is connected to the terminal 3
4 is electrically connected to a second circuit 36 having a power supply section and a signal section. The thin iron plate 31 has a ring 33 and a terminal 3
Although it is not in contact with 4, the one end is connected to the power supply unit.

To start using the fluid transporter, as shown in FIG. 3b, the push button 32 is pushed to push the thin iron plate 31 against the ring 33. Thereafter, as shown in FIG. 3C, even if the push button 32 is pulled back to its original position, the thin iron plate 31 is kept in contact with the ring 33 by the magnetic force. At this time, an electric current flows through the first circuit 35, and discharge of the fluid is started. When the discharge of the fluid is completed and the pressurized gas is blown out from the outlet 14 of the branch conduit, the thin iron plate 31 is separated from the ring 33 by the pressure of the gas, as shown in FIG. At the same time when the current stops flowing, the thin iron plate 31 comes into contact with the terminal 34, and the current flows through the second circuit 36 to give a signal to indicate "end".

Although the push button 32 is pulled back by hand in this embodiment, a spring or the like may be used so that it does not have to be pulled back by hand.

[Embodiment 2] FIG. 4 is a view showing an embodiment of a changeover switch. 4a to 4d show a series of operating states of the changeover switch. The structure of the fluid transporter main body was the same as in FIG. FIG. 4a shows the switching switch without a fluid transporter, where in FIG. 4a 11 is a branch conduit and 14 is an opening of the branch conduit. Reference numeral 41 is a disk-shaped iron plate serving as a magnet, 42 is a plastic push button, and the disk-shaped iron plate 41 and the push button 42 are integrally formed. 43 is an iron ring attached to the periphery of the outlet 14 of the branch conduit, and 44 is an iron terminal.
The ring 43 is electrically connected to a first circuit 45 having a power supply section and an electrochemical cell section, and the terminal 44 is electrically connected to a second circuit 46 having a power supply section and a signal section. There is. The disk-shaped iron plate 41 is not in contact with the ring 43 or the terminal 44, but one end thereof is connected to the power supply unit.

To start using the fluid transporter, as shown in FIG. 4b, the hand push button 42 is pushed to push the disc-shaped iron plate 41 against the ring 43. Then, the disk-shaped iron plate 41 is kept in contact with the ring 43 by the magnetic force. As a result, a current flows through the first circuit 45,
Fluid ejection is started. When the discharge of the fluid is completed and the pressurized gas is blown out from the outlet 14 of the branch conduit, the disk-shaped iron plate 41 is separated from the ring 43 by the pressure of the gas, as shown in FIG. 4c. No current flows through the circuit 45 of FIG. At the same time, the disk-shaped iron plate 41 comes into contact with the terminal 44, a current flows through the second circuit 46, and a signal is emitted to indicate "end".

[0042]

EFFECTS OF THE INVENTION A pressure generating section and a fluid ejecting section are provided, and the pressure generating section and the fluid ejecting section are detachable structures.
The pressure generation unit has a gas generation unit and a pressure transmission unit, the gas generation unit has a first electric circuit, a second electric circuit, and a changeover switch for switching the power supply to these circuits, One electric circuit has a power supply section and an electrochemical cell section that generates gas by passing a direct current, and the second electric circuit has a power supply section and a signal section that notifies the stop of fluid supply, and a pressure The transmission part has a pressure transmission part main body for transmitting the pressure of gas, a moving body provided inside the pressure transmission part main body, and an opening communicating the inside and the outside of the pressure transmission part main body, and the moving body is The fluid ejection part is arranged so that it can be moved by pressure and the opening and closing can be opened and closed, and the fluid ejection part is a fluid ejection part body capable of storing fluid, an ejection port for supplying the fluid, and an ejection part body by pressing the moving body. A fluid extruding body for discharging the fluid stored in A direct current is applied to the first electric circuit by the changeover switch, and the pressure of the gas generated from the electrochemical cell section is transmitted to the moving body, fluid extruding body, and fluid, and the target fluid is discharged. At the same time, the opening of the moving body moves to open the opening, and the gas inside the main body of the pressure transmitting unit that is discharged from the opening activates the changeover switch to cut off the current flowing in the first electric circuit and at the same time The circuit is characterized in that an electric current is applied to the circuit, and a fluid supply stop signal is issued from the signal section.

According to this, a very small amount of fluid can be accurately supplied over a long period of time by a very simple method of setting the discharge amount of the fluid only by the electric current. Further, in the fluid transporter according to the present invention, the pressure generating part and the fluid ejecting part are configured to be attachable / detachable so that only the fluid ejecting part can be used only once and the pressure generating part can be used. Can be used repeatedly. Further, if both the gas generating part and the pressure transmitting part of the pressure generating part are detachable, it is possible to easily perform degassing and water replenishment required when repeatedly used from the inside of the pressure transmitting part main body.

On the other hand, in the fluid transporter according to the present invention, the electrical connection to the first circuit having the power supply section and the electrochemical cell section and the connection to the second circuit having the power supply section and the signal section are provided. The electrical connection can be switched by the changeover switch, so when starting use and discharging the target fluid, current flows through the first circuit, and when discharge of the target fluid ends, pressure transmission The pressurized gas inside the main body of the unit flows out from the opening port provided in the main body of the pressure transmitting unit.
The changeover switch is activated by the gas that flows out,
At the same time as the current flows in the second circuit, the current to the first circuit is cut off.

As a result, the generation of gas from the electrochemical cell is stopped, and a signal indicating the end of discharge of the target fluid can be emitted. If you use a device that produces a sound such as a buzzer for the signal, you can hear it with your ears.
It is possible to know the end of discharge of the target fluid. Of course, it is needless to say that the changeover switch may have a shape other than that described in the embodiment. Also, any other signal can be used as the signal section.

In the embodiment, a battery and a constant resistance are used in combination as a power source section, but various power sources such as a constant current circuit can be used. Further, although the branch conduit for inducing and discharging the gas is provided in the opening in the embodiment, it may not be provided depending on the location of the changeover switch. The shape of the branch conduit may be any as long as it can induce the discharge of gas.

Further, since the electrochemical cell portion of the fluid transporter according to the present invention can be made extremely small, the fluid transporter can be made smaller and lighter and can be portable. it can. Since the operation at the time of use is also easy, it becomes extremely easy for the patient to use when supplying a medical drug solution.

Therefore, since the fluid transporter according to the present invention has a simple structure and is inexpensive, it is possible to eliminate the drawbacks of the conventional infusion pump using the bellows, diaphragm or syringe. The target value is extremely large.

[Brief description of drawings]

FIG. 1 is a diagram showing a cross-sectional structure of a fluid transporter described in a first embodiment of the present invention in a state where a target fluid is being discharged.

FIG. 2 is a diagram showing a cross-sectional structure of the fluid transporter described in Embodiment 1 of the present invention in a state in which the discharge of the target fluid is completed.

FIG. 3 is a diagram showing an operating state of a changeover switch of the fluid transporter described in the first embodiment according to the present invention.

FIG. 4 is a diagram showing an operating state of a changeover switch of the fluid transporter described in the second embodiment according to the present invention.

[Explanation of symbols]

 2 Fluid injection part 3 Gas generation part 4 Pressure transmission part 5 Power supply part 6 Electrochemical cell 7 Signal part 8 Changeover switch 10 Moving body 11 Branch conduit 13 Opening 31 Thin iron plate 41 Disc-shaped iron plate

Claims (1)

[Claims] 1. A pressure generating section and a fluid ejecting section, wherein the pressure generating section and the fluid ejecting section are detachable, and the pressure generating section has a gas generating section and a pressure transmitting section. , The gas generation unit has a first electric circuit, a second electric circuit, and a changeover switch for switching the energization to these circuits, the first electric circuit The second electric circuit has a power source section and a signal section for notifying the stop of fluid supply, and the pressure transmission section has a pressure transmission section main body for transmitting gas pressure and a pressure. It has a moving body provided inside the transmission unit main body and an opening communicating between the inside and the outside of the pressure transmission unit main body, and the moving body is arranged so as to be movable by the pressure of the gas and capable of opening and closing the opening. The fluid ejection part is a fluid ejection part that can store fluid. And a fluid extruding body for ejecting the fluid stored in the ejection unit main body by pressing the moving body and a discharge port for supplying the fluid, and applying a direct current to the first electric circuit by the changeover switch. , The pressure of the gas generated from the electrochemical cell is transmitted to the moving body, fluid extruding body, and fluid, and the target fluid is discharged and the opening of the opening is opened by the movement of the moving body, and the pressure discharged from the opening. The changeover switch is operated by the gas inside the transmission unit main body to cut off the current flowing in the first electric circuit, and at the same time, the current is caused to flow in the second electric circuit, and the fluid supply stop signal is issued from the signal unit. A fluid transporter characterized by the above.