WO2014132712A1 - Liquid reservoir and liquid feeding device - Google Patents

Liquid reservoir and liquid feeding device Download PDF

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Publication number
WO2014132712A1
WO2014132712A1 PCT/JP2014/051458 JP2014051458W WO2014132712A1 WO 2014132712 A1 WO2014132712 A1 WO 2014132712A1 JP 2014051458 W JP2014051458 W JP 2014051458W WO 2014132712 A1 WO2014132712 A1 WO 2014132712A1
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WO
WIPO (PCT)
Prior art keywords
liquid
storage unit
container
liquid storage
wall surface
Prior art date
Application number
PCT/JP2014/051458
Other languages
French (fr)
Japanese (ja)
Inventor
横井宏之
成田幸輔
Original Assignee
株式会社村田製作所
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Publication date
Priority to JP2013-035346 priority Critical
Priority to JP2013035346 priority
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2014132712A1 publication Critical patent/WO2014132712A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • F04B23/02Pumping installations or systems having reservoirs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61JCONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/05Containers specially adapted for medical or pharmaceutical purposes for collecting, storing or administering blood, plasma or medical fluids ; Infusion or perfusion containers
    • A61J1/14Details, e.g. provisions for hanging or shape retaining means; Accessories therefor, e.g. inlet or outlet ports, filters or caps

Abstract

This liquid feeding device (100) is provided with a liquid reservoir (101) which stores a liquid, a pump (104) which transports the liquid stored in the liquid reservoir (101), and a connecting pipe (107) which connects the liquid reservoir (101) and the pump (104). The liquid reservoir (101) is provided with a container (110) which stores the liquid and with an impregnation body (112) which is impregnated with the liquid. An outlet hole (111A) of the liquid stored in the container (110) is provided in the container (110). A first end (112A) of the impregnation body (112) is fitted into the outlet hole (111A). Also, the impregnation body (112) is provided extending in the reservoir chamber (113) from the outlet hole (111A) to the side plate (110B) and the bottom plate (110C).

Description

Liquid storage unit, liquid feeding device

The present invention relates to a liquid storage unit that stores a liquid and a liquid feeding device that feeds the liquid stored in the liquid storage unit by operation of a pump.

In Patent Document 1, a supply device that supplies liquid stored in a container to a liquid consumption unit is disclosed as a liquid feeding device.

FIG. 11 is an external view of the supply device 1 according to Patent Document 1. FIG. The supply device 1 includes a container 2 that stores a liquid such as a nutrient, a suspension device 3 that suspends the container 2, and a tube device 4 that supplies the liquid stored in the container 2 to a patient. .

The suspension device 3 is attached to the hook 13 and holds the container 2. The container 2 is suspended by the suspension device 3 so as to form a predetermined angle with respect to the horizontal plane.

The pipe device 4 includes a penetration tube 17 inserted into the container 2, a conduit 19 connected to the penetration tube 17, a dropping chamber 21 connected to the conduit 19, and a conduit connected to the dropping chamber 21. 25, a tube clamping device 30 connected to the conduit 25, and a conduit 33 connected to the tube clamping device 30 and the patient. The dropping chamber 21 functions as a pump, and temporarily stores a predetermined amount of liquid that has flowed out of the conduit 19 and dropped in the dropping chamber 21. The tube clamping device 30 has a flow path 31 connected from the conduit 25 to the conduit 33, and closes or opens the flow path 31.

In the supply device 1, when the flow path 31 of the tube clamping device 30 is opened, the liquid in the container 2 penetrates little by little from the tube 17 and flows into the dropping chamber 21 through the conduit 19. Then, the liquid dropped in the dropping chamber 21 is sent to the patient via the conduit 25, the flow path 31 of the tube fastening device 30, and the conduit 33.

Generally, when a liquid is stored in the container 2, a gas (for example, air) flows into the container 2.

In the supply device 1, the tip 18 of the piercing tube 17 is provided at the corner 6 of the container 2 serving as the lowest point. Therefore, in the supply device 1, even when the remaining amount of liquid in the container 2 decreases, the tip 18 of the piercing tube 17 comes into contact with the liquid, so that only the liquid from the container 2 passes from the piercing tube 17 to the conduit 19. leak. That is, the supply device 1 can suppress the gas in the container 2 from being sent to the patient via the tube device 4.

JP 62-236557 A

However, in the supply device 1, for example, when an impact is applied to the container 2, the attitude of the container 2 changes, and the position of the tip 18 of the piercing tube 17 with respect to the container 2 may change to a position other than the lowest point. . In such a case, if the remaining amount of the liquid in the container 2 is small, the tip 18 of the piercing tube 17 may not be in contact with the liquid.

Therefore, in the supply device 1, when the attitude of the container 2 changes and the position of the tip 18 of the piercing tube 17 with respect to the container 2 changes to a position other than the lowest point, the gas in the container 2 pierces from the tip 18. There is a problem in that it flows into the through pipe 17 and flows out to the conduit 19 (downstream of the liquid reservoir).

Therefore, the present invention provides a liquid storage unit and a liquid feeding device that can suppress the outflow of the gas in the liquid storage unit to the downstream side of the liquid storage unit, even when the attitude of the liquid storage unit changes. Objective.

The liquid storage unit of the present invention has the following configuration in order to solve the above problems.

(1) It has the 1st wall part provided with the hole, and the 2nd wall part which connects to the 1st wall part and forms a storage room with the 1st wall part, and stores a liquid in the storage room A container to be made,
An impregnated body that extends from the hole to at least the second wall in the storage chamber and impregnates the liquid.

In this configuration, the liquid stored in the storage chamber is impregnated in the impregnated body by the capillary phenomenon of the impregnated body and sucked up to the hole. The hole of the liquid storage part is connected to the liquid consumption part directly or via a pump, for example.

Here, the impregnated body is provided extending from the hole to the second wall portion. Therefore, even when the posture of the liquid storage unit changes, such as when the liquid storage unit rotates, the liquid in the vicinity of the hole in the first wall or in the vicinity of the second wall in the storage chamber touches the impregnated body. Therefore, in this configuration, the liquid in the storage chamber is impregnated in the impregnated body by the capillary action of the impregnated body, and is sucked up to the pores preferentially over the gas. Here, the penetration tube 17 shown in FIG. 11 can suck up liquid only from the tip 18, but the impregnated body can suck up liquid from the entire surface of the impregnated body.

Therefore, the liquid storage unit having this configuration can suppress the gas in the liquid storage unit from flowing out to the downstream side of the liquid storage unit, even when the posture of the liquid storage unit is changed.

This configuration is particularly effective when the remaining amount of liquid inside the container is small.

(2) The first wall portion constitutes one wall surface in the container,
The second wall portion constitutes at least one wall surface in the container,
It is preferable that the impregnated body is in contact with at least the wall surface farthest from the hole among the plurality of wall surfaces formed by the first and second wall portions.

In this configuration, the plurality of wall surfaces are inner surfaces of the container facing the storage chamber. The wall surface of the first wall portion and the wall surface of the second wall portion form a predetermined angle (for example, 90 degrees).

In this configuration, even when the posture of the liquid storage unit changes, the liquid near the farthest wall in the storage chamber touches the impregnated body. Therefore, in this configuration, the liquid in the vicinity of the farthest wall surface in the storage chamber is also impregnated in the impregnated body due to the capillary phenomenon of the impregnated body, and is sucked up to the holes preferentially over the gas. That is, it is possible to suppress the gas in the liquid storage part from flowing out to the downstream side of the liquid storage part as compared with the conventional case.

(3) The second wall portion constitutes the farthest wall surface facing the hole, and a side wall surface connecting the wall surface constituted by the first wall portion and the farthest wall surface,
It is preferable that the impregnated body extends from the wall surface constituted by the first wall portion and contacts the farthest wall surface.

In this configuration, even when the posture of the liquid storage unit changes, at least one of the liquid near the wall surface constituted by the first wall portion or the farthest wall surface constituted by the second wall portion touches the impregnated body. .

Therefore, in this configuration, even when the posture of the liquid storage portion changes, at least one liquid near the wall surface constituted by the first wall portion or the farthest wall surface constituted by the second wall portion is impregnated. By the capillary phenomenon, the impregnated body is impregnated and sucked up to the pores preferentially over the gas. That is, it is possible to suppress the gas in the liquid storage part from flowing out to the downstream side of the liquid storage part as compared with the conventional case.

(4) The storage chamber is polyhedral.
The impregnated body is preferably in contact with all corners in the container.

In this configuration, the impregnated body is in contact with the corner of the wall surface farthest from the hole. In this configuration, even when the posture of the liquid storage unit changes, the liquid near at least one corner in the container touches the impregnated body. Therefore, in this configuration, the liquid in the vicinity of at least one corner in the container is impregnated in the impregnated body due to the capillary action of the impregnated body, and is sucked up to the hole preferentially over the gas. That is, it is possible to suppress the gas in the liquid storage part from flowing out to the downstream side of the liquid storage part as compared with the conventional case.

The corner is composed of at least three surfaces.

(5) The impregnated body has a portion in contact with a peripheral edge of the wall surface constituted by the first wall portion and a peripheral edge of the farthest wall surface and connecting the peripheral edge of the wall surface and the peripheral edge of the farthest wall surface. It is preferable.

In this configuration, even when the posture of the liquid storage unit changes, at least one liquid near the periphery of the wall surface constituted by the first wall portion or near the periphery of the farthest wall surface constituted by the second wall portion Touch the impregnated body.

Therefore, in this configuration, even when the posture of the liquid storage unit changes, at least one of the vicinity of the periphery of the wall surface constituted by the first wall portion or the vicinity of the periphery of the farthest wall surface constituted by the second wall portion. The liquid is impregnated in the impregnated body by the capillary action of the impregnated body, and is sucked up to the pores preferentially over the gas. That is, it is possible to suppress the gas in the liquid storage part from flowing out to the downstream side of the liquid storage part as compared with the conventional case.

(6) It is preferable that the impregnated body is provided along at least a part of the first wall part and at least a part of the second wall part.

In this configuration, even when the posture of the liquid storage unit changes, the liquid in the vicinity of at least a part of the first wall part or the vicinity of at least a part of the second wall part touches the impregnated body.

Therefore, in this configuration, even when the posture of the liquid storage unit changes, the liquid in the vicinity of at least a part of the first wall part or in the vicinity of at least a part of the second wall part flows into the impregnated body due to the capillary phenomenon of the impregnated body. It is impregnated and sucked up into the pores preferentially over the gas. That is, it is possible to suppress the gas in the liquid storage part from flowing out to the downstream side of the liquid storage part as compared with the conventional case.

(7) The first and second wall portions constitute curved wall surfaces,
It is preferable that the impregnated body is in contact with all of the curved wall surfaces that bulge outward as viewed from the inside of the container.

In this configuration, even when the posture of the liquid storage unit changes, the liquid near the curved wall surface in the storage chamber touches the impregnated body. Therefore, in this configuration, the liquid in the vicinity of the curved wall surface in the storage chamber is also impregnated in the impregnated body due to the capillary phenomenon of the impregnated body, and is sucked up to the holes preferentially over the gas. That is, it is possible to suppress the gas in the liquid storage part from flowing out to the downstream side of the liquid storage part as compared with the conventional case.

(8) It is preferable that the said container has a filter which prevents passage of the said liquid and allows gas to pass through.

In this configuration, for example, the hole of the liquid storage unit is connected to the pump, and the liquid inside the container is sucked out of the hole by driving the pump. In this configuration, the gas outside the container flows into the storage chamber via the filter due to a decrease in the pressure of the storage chamber.

Therefore, this configuration can prevent the pressure in the storage chamber from becoming lower than the atmospheric pressure outside the container. For this reason, this configuration prevents, for example, the pumping operation from causing the pumping of the liquid to become unintentionally stopped due to the negative pressure of the storage chamber and the pressure in the storage chamber being too low than the pressure outside the container. it can.

Further, the liquid delivery device of the present invention has the following configuration in order to solve the above problems.

(9) The liquid storage unit according to any one of (1) to (8),
A pump connected to the hole of the liquid storage unit and for feeding the liquid stored in the liquid storage unit.

In this configuration, the liquid feeding device sends the liquid stored in any one of the liquid storage units (1) to (7) by the operation of the pump. With this configuration, the same effect can be obtained in the liquid feeding device including the liquid storage unit.

(10) The pump includes a pump chamber into which the liquid flowing out from the hole flows, a diaphragm facing the pump chamber, and a driving body that is provided on one main surface of the diaphragm and flexibly vibrates the diaphragm. It is preferable that it is a diaphragm pump which has these.

In this configuration, the diaphragm pump operates by bending vibration of the diaphragm. In the diaphragm pump, the discharge pressure decreases as the amount of bubbles in the liquid in the pump chamber increases. However, in the configuration of (1), the gas in the liquid storage unit flows out to the pump chamber downstream of the liquid storage unit. This can be suppressed more than before. Therefore, the configuration (1) is suitable for a diaphragm pump.

According to this invention, even when the attitude of the liquid storage unit changes, it is possible to suppress the gas in the liquid storage unit from flowing out to the downstream side of the liquid storage unit.

It is sectional drawing of the principal part of the liquid feeding apparatus 100 which concerns on 1st Embodiment of this invention. It is an external view of the liquid storage part 101 shown in FIG. It is an external view of the impregnation body 112 shown in FIG. It is sectional drawing of the principal part of the liquid feeding apparatus 100 when the liquid feeding apparatus 100 shown in FIG. 1 is performing liquid feeding. FIG. 2 is a cross-sectional view of the liquid storage unit 101 in a state where the posture of the liquid storage unit 101 shown in FIG. 1 is changed. FIG. 2 is a cross-sectional view of the liquid storage unit 101 in a state where the posture of the liquid storage unit 101 shown in FIG. 1 is changed. It is an external view of the principal part of the liquid storage part 201 with which the liquid feeding apparatus which concerns on 2nd Embodiment of this invention is equipped. FIG. 9 is a cross-sectional view of a main part of a liquid storage unit 251 that is a modification of the liquid storage unit 201 shown in FIG. 7. It is an external view of the principal part of the liquid storage part 301 with which the liquid feeding apparatus which concerns on 3rd Embodiment of this invention is equipped. It is an external view of the principal part of the liquid storage part 401 with which the liquid feeding apparatus which concerns on 4th Embodiment of this invention is equipped. It is an external view of the supply apparatus 1 which concerns on patent document 1. FIG.

<< First Embodiment >>
Hereinafter, the liquid feeding device 100 according to the first embodiment of the present invention will be described.

FIG. 1 is a cross-sectional view of a main part of a liquid delivery device 100 according to the first embodiment of the present invention. FIG. 2 is an external view of the liquid storage unit 101 shown in FIG. FIG. 3 is an external view of the impregnated body 112 shown in FIG.

The liquid feeding device 100 includes a liquid storage unit 101 that stores a liquid, a pump 104 that transports the liquid stored in the liquid storage unit 101, and a connecting pipe 107 that connects the liquid storage unit 101 and the pump 104. The liquid delivery device 100 is used, for example, at a medical site such as a hospital.

The liquid storage unit 101 includes a container 110 that stores a liquid therein, and an impregnated body 112 that impregnates the liquid. The liquid is, for example, glucose infusion or the like, and is put in the liquid storage unit 101 at a medical site.

The container 110 is made of, for example, polyolefin resin, PET resin, PC resin, or glass. The container 110 has a rectangular parallelepiped shape, and includes a single upper plate 110A, four side plates 110B, and a single bottom plate 110C. The upper plate 110A is provided with an outflow hole 111A for the liquid stored in the container 110, and the side plate 110B and the bottom plate 110C are not provided with the outflow hole 111A.

That is, the upper plate 110A corresponds to the “first wall portion” of the present invention, and the side plate 110B and the bottom plate 110C correspond to the “second wall portion” of the present invention.

In addition, the container 110 constitutes a storage chamber 113 that is an internal space of the container 110 by one upper plate 110A, four side plates 110B, and one bottom plate 110C. The container 110 constitutes six inner wall surfaces facing the storage chamber 113 by one upper plate 110A, four side plates 110B, and one bottom plate 110C. The inner wall surface 110D of the bottom plate 110C faces the outflow hole 111A. Further, the inner wall surface 110E of the upper plate 110A and the inner wall surface 110F of the side plate 110B form 90 degrees.

Although details will be described later, a filter 111B is provided on the bottom plate 110C. This filter 111B blocks the passage of liquid and allows gas to pass.

The impregnated body 112 is made of, for example, a water supply rod, non-woven fabric, polyester or polyolefin-based synthetic fiber, or natural fiber such as cotton or silk. The impregnated body 112 is formed by forming these materials into a U shape.

The first end 112 </ b> A of the impregnated body 112 is fitted into the outflow hole 111 </ b> A of the container 110. The impregnated body 112 is provided in the storage chamber 113 so as to extend from the outflow hole 111A to the side plate 110B and the bottom plate 110C. Specifically, the impregnated body 112 extends along the inner wall surface 110E of the upper plate 110A and the inner wall surface 110F of the side plate 110B. The second end 112B of the impregnated body 112 is in contact with the inner wall surface 110D farthest from the outflow hole 111A among the six inner wall surfaces. The impregnated body 112 is in contact with all the six inner wall surfaces.

The connecting pipe 107 has a cylindrical shape, for example. The connecting pipe 107 connects the liquid storage unit 101 and the pump 104, and allows an outflow hole 111A of the liquid storage unit 101 to communicate with a suction hole 141 of the pump 104 described later.

The pump 104 is provided on the main surface on the opposite side of the pump housing 149, the diaphragm 145 that forms the pump chamber 148 together with the pump housing 149 and faces the pump chamber 148, and the pump chamber 148 of the diaphragm 145. And a piezoelectric element 146 that expands and contracts by application of a driving voltage. When an alternating drive voltage is applied, the diaphragm 145 bends and vibrates due to expansion and contraction of the piezoelectric element 146. As a result, the pump 104 operates.

The pump housing 149 is provided with a suction hole 141 through which the liquid in the liquid storage unit 101 is sucked into the pump chamber 148 via the connecting pipe 107 and a discharge hole 142 through which the liquid is discharged from the pump chamber 148. ing.

The pump 104 further includes a first check valve 143 that prevents backflow of liquid from the pump chamber 148 side to the suction hole 141 side, and a second check that prevents backflow of liquid from the discharge hole 142 side to the pump chamber 148 side. And a valve 144. The pump chamber 148 is a sealed space that is configured by the pump housing 149 and the diaphragm 145 and is sandwiched between the first and second check valves 143 and 144. The pump 104 is a so-called diaphragm pump, and the discharge pressure decreases as the amount of bubbles in the liquid M in the pump chamber 148 increases.

Next, the scene where the liquid is fed by the liquid feeding device 100 will be described.

FIG. 4 is a cross-sectional view of the liquid delivery device 100 when the liquid delivery device 100 shown in FIG. The arrows in the figure indicate the direction in which the liquid M flows. 5 and 6 are cross-sectional views of the liquid storage unit 101 in a state where the posture of the liquid storage unit 101 shown in FIG. 1 is changed.

The liquid delivery device 100 is provided to a medical site, and a medical worker such as a nurse puts the liquid M into the container 110 via a liquid medicine filling port provided separately in the container 110, for example. The liquid M is, for example, glucose infusion. Then, the medical worker drives the pump 104 to discharge the air in the flow path of the liquid feeding device 100 from the discharge hole 142. After discharging the air in the flow path of the liquid delivery device 100, the medical worker connects the discharge hole 142 of the pump 104 to the liquid consumption unit 109 via the tube 108.

In the liquid storage unit 101, the liquid M in the storage chamber 113 is impregnated in the impregnated body 112 by the capillary phenomenon of the impregnated body 112, and is sucked up to the outflow hole 111A. While the pump 104 is operating, the liquid M sucked into the outflow hole 111 </ b> A is supplied to the liquid consumption unit 109 via the connecting pipe 107 and the pump 104.

Here, in the liquid feeding device 100, the impregnated body 112 is provided to extend from the outflow hole 111A to the side plate 110B and the bottom plate 110C via the upper plate 110A. Specifically, the impregnated body 112 extends along the inner wall surface 110E of the upper plate 110A and the inner wall surface 110F of the side plate 110B, and is in contact with the inner wall surface 110D of the bottom plate 110C farthest from the outflow hole 111A.

Therefore, even when the posture of the liquid storage unit 101 changes as shown in FIGS. 5 and 6, for example, when the liquid storage unit 101 rotates, the vicinity of the inner wall surface of at least one of the top plate 110A, the side plate 110B, and the bottom plate 110C. Liquid M touches the impregnated body 112.

Therefore, in the liquid storage unit 101, even when the posture of the liquid storage unit 101 changes, the liquid M near the inner wall surface of at least one of the upper plate 110A, the side plate 110B, and the bottom plate 110C is caused by the capillary phenomenon of the impregnated body 112. The impregnated body 112 is impregnated and sucked up to the outflow hole 111A preferentially over the gas. Here, the piercing tube 17 shown in FIG. 11 can suck up the liquid only from the tip 18, but the impregnated body 112 can suck up the liquid M from the entire surface of the impregnated body 112.

Therefore, according to the liquid storage unit 101, even when the posture of the liquid storage unit 101 changes, it is possible to suppress the gas in the storage chamber 113 from flowing out to the downstream side of the liquid storage unit 101 compared to the conventional case. Therefore, the configuration of the liquid storage unit 101 is suitable for the pump 104 in which the discharge pressure decreases as the amount of bubbles in the liquid M in the pump chamber 148 increases. Further, the liquid storage unit 101 can suppress the gas in the storage chamber 113 from being sent to the liquid consumption unit 109 via the tube 108 as compared with the conventional case.

And the liquid delivery apparatus 100 provided with the liquid storage part 101 also has the same effect. Therefore, the supply device 1 needs to fix the posture of the container 2 so that the posture of the container 2 does not change (see FIG. 11), but the liquid feeding device 100 does not need to fix the posture of the liquid storage unit 101. Therefore, the user of the liquid feeding device 100 can act freely without worrying about the posture of the liquid storage unit 101 while carrying the liquid feeding device 100.

Here, when the liquid M in the storage chamber 113 flows out of the outflow hole 111A by the operation of the pump 104, the pressure in the storage chamber 113 decreases. For example, when the container 110 is made of a hard material, the container 110 is not contracted and deformed toward the storage chamber 113 as the pressure in the storage chamber 113 decreases, and the pressure in the storage chamber 113 becomes lower than the atmospheric pressure outside the container 110.

Therefore, in the liquid delivery device 100, the container 110 has a filter 111B that prevents the liquid M from passing and allows the gas to pass. Therefore, the gas outside the container 110 flows into the storage chamber 113 through the filter 111B due to a decrease in the pressure in the storage chamber 113.

Therefore, the liquid delivery device 100 can prevent the pressure in the storage chamber 113 from becoming lower than the atmospheric pressure outside the container 110. For this reason, in the liquid feeding device 100, the pump 104 is driven, the pressure in the storage chamber 113 becomes negative, and the pressure inside the container 110 becomes too lower than the atmospheric pressure, so that the liquid feeding by the pump 104 stops unintentionally. Can be prevented.

<< Second Embodiment >>
Hereinafter, a liquid feeding device according to a second embodiment of the present invention will be described.

FIG. 7 is an external view of the main part of the liquid storage unit 201 provided in the liquid delivery device according to the second embodiment of the present invention. The liquid feeding device according to the second embodiment is different from the liquid feeding device 100 according to the first embodiment in an impregnating body 212 provided in the liquid storage unit 201. Since other configurations are the same, description thereof is omitted.

The impregnated body 212 has a different shape from the impregnated body 112 of the liquid storage unit 101. Since other configurations are the same, description thereof is omitted.

More specifically, the impregnated body 212 has a first end portion 112A, four second end portions 212B, and four third end portions 212C. The first end 112A of the impregnated body 212 is fitted into the outflow hole 111A.

The impregnated body 212 extends from the outflow hole 111A to the side plate 110B and the bottom plate 110C in the storage chamber 113. The second end 212B and the third end 212C of the impregnated body 212 are in contact with the eight corners of the rectangular parallelepiped container 110. Therefore, the second end portion 212B of the impregnated body 212 is in contact with the corner of the inner wall surface 110D of the bottom plate 110C that is farthest from the outflow hole 111A among the six inner wall surfaces.

Also in the liquid storage unit 201, the liquid M in the storage chamber 113 is impregnated in the impregnated body 212 by the capillary phenomenon of the impregnated body 212 and sucked up to the outflow hole 111A. While the pump 104 is operating, the liquid M sucked into the outflow hole 111A is supplied to the liquid consumption unit 109 via the connecting pipe 107 and the pump 104 (see FIG. 4).

Here, the impregnated body 212 is provided extending from the outflow hole 111A to the side plate 110B and the bottom plate 110C. The second end portion 212B and the third end portion 212C of the impregnated body 212 are in contact with all corners of the rectangular parallelepiped container 110.

Therefore, even when the posture of the liquid storage unit 201 changes, the liquid M near at least one corner of the rectangular parallelepiped container 110 touches the impregnated body 212.

Therefore, in the liquid storage unit 201, even when the posture of the liquid storage unit 201 changes, the liquid M near at least one corner of the rectangular parallelepiped container 110 is impregnated in the impregnated body 212 due to the capillary phenomenon of the impregnated body 212. It is sucked up to the outflow hole 111A preferentially over the gas. Here, like the impregnated body 112, the impregnated body 212 can also suck up the liquid M from the entire surface of the impregnated body 212.

Therefore, according to the liquid storage unit 201 of the second embodiment, the same effects as those of the liquid storage unit 101 of the first embodiment can be obtained. Moreover, the liquid feeding device of the second embodiment including the liquid storage unit 201 also has the same effect as the liquid feeding device 100 of the first embodiment.

FIG. 8 shows a container 210 having a bottom plate 210C instead of the bottom plate 110C of the container 110 shown in FIG. For example, in the cross-section of FIG. 8, the tip 210E of the bottom plate 210C has a dominant angle (180 <θ <360) when viewed from the inside 210 of the container. For this reason, the liquid M near the tip 210E of the bottom plate 210C flows toward the corner of the inner wall surface 210D of the bottom plate 210C. Therefore, when the container 210 is used, the impregnated body 212 may not be in contact with the vicinity of the tip 210E.

<< Third Embodiment >>
Hereinafter, a liquid feeding device according to a third embodiment of the present invention will be described.

FIG. 9 is an external view of the main part of the liquid storage unit 301 provided in the liquid delivery device according to the third embodiment of the present invention. The liquid feeding device according to the third embodiment is different from the liquid feeding device 100 according to the first embodiment in a container 310 and an impregnated body 312 provided in the liquid storage unit 301. Since other configurations are the same, description thereof is omitted.

More specifically, the container 310 has an elliptical column shape, and includes an upper plate 310A, a side plate 310B, and a bottom plate 310C. The upper plate 310A is provided with an outflow hole 111A for the liquid M stored in the container 310, and the side plate 310B and the bottom plate 310C are not provided with the outflow hole 111A.

That is, the upper plate 310A corresponds to the “first wall portion” of the present invention, and the side plate 310B and the bottom plate 310C correspond to the “second wall portion” of the present invention.

In addition, the container 310 constitutes a storage chamber 313 that is an internal space of the container 310 by the upper plate 310A, the side plate 310B, and the bottom plate 310C. The container 310 includes three inner wall surfaces facing the storage chamber 313 by the upper plate 310A, the side plate 310B, and the bottom plate 310C. The inner wall surface 310D of the bottom plate 310C faces the outflow hole 111A. Further, the inner wall surface of the upper plate 310A and the inner wall surface of the side plate 310B form 90 degrees.

The impregnated body 312 has a shape different from that of the impregnated body 112 of the liquid storage unit 101. The other configuration of the impregnated body 312 is the same as that of the impregnated body 112, and thus description thereof is omitted.

Specifically, the impregnated body 312 connects the first end portion 112A, the annular bottom plate portion 312B, the upper plate portion 312C connected to the first end portion 112A, and the bottom plate portion 312B and the upper plate portion 312C. Column part 312D. The first end 112A of the impregnated body 312 is fitted into the outflow hole 111A.

The impregnated body 312 extends from the outflow hole 111A to the side plate 310B and the bottom plate 310C in the storage chamber 313. Of the three inner wall surfaces, the bottom plate portion 312B of the impregnated body 312 is in contact with the periphery of the inner wall surface 310D of the bottom plate 310C that is farthest from the outflow hole 111A.

Also in the liquid storage unit 301, the liquid M in the storage chamber 313 is impregnated in the impregnated body 312 by the capillary phenomenon of the impregnated body 312 and sucked up to the outflow hole 111A. While the pump 104 is operating, the liquid M sucked into the outflow hole 111A is supplied to the liquid consumption unit 109 via the connecting pipe 107 and the pump 104 (see FIG. 4).

Here, the impregnated body 312 extends from the outflow hole 111A to the side plate 310B and the bottom plate 310C via the upper plate 310A. More specifically, the upper plate portion 312C of the impregnated body 312 is in contact with the peripheral edge of the inner wall surface of the upper plate 310A among the three inner wall surfaces. The impregnated body 312 extends along the inner wall surface of the side plate 310B. The bottom plate portion 312B of the impregnated body 312 is in contact with the peripheral edge of the inner wall surface 310D of the bottom plate 310C farthest from the outflow hole 111A among the three inner wall surfaces.

Therefore, even when the posture of the liquid storage unit 301 changes, at least one liquid M near the periphery of the inner wall surface of the upper plate 310A in the storage chamber 313 or near the periphery of the inner wall surface 310D of the bottom plate 310C is impregnated 312. Touch.

Therefore, in the liquid storage unit 301, even when the posture of the liquid storage unit 301 is changed, at least one of the vicinity of the periphery of the inner wall surface of the upper plate 310A in the storage chamber 313 or the periphery of the inner wall surface 310D of the bottom plate 310C. The liquid M is impregnated in the impregnated body 312 by the capillary phenomenon of the impregnated body 312 and sucked up to the outflow hole 111A preferentially over the gas. Here, similarly to the impregnated body 112, the impregnated body 312 can also suck up the liquid M from the entire surface of the impregnated body 312.

Therefore, according to the liquid storage unit 301 of the third embodiment, the same effects as those of the liquid storage unit 101 of the first embodiment can be obtained. Moreover, the liquid feeding device of the third embodiment including the liquid storage unit 301 also has the same effect as the liquid feeding device 100 of the first embodiment.

In FIG. 9, the impregnated body 312 has two pillar portions 312D, but the number of the pillar portions 312D may be one as long as the bottom plate portion 312B and the upper plate portion 312C are connected.

<< 4th Embodiment >>
Hereinafter, a liquid feeding device according to a fourth embodiment of the present invention will be described.

FIG. 10 is a cross-sectional view of the main part of the liquid storage unit 401 provided in the liquid delivery device according to the fourth embodiment of the present invention. The liquid feeding device according to the fourth embodiment is different from the liquid feeding device 100 according to the first embodiment in a container 410 and an impregnated body 412 provided in the liquid storage unit 401. Since other configurations are the same, description thereof is omitted.

More specifically, the container 410 is a bag-like soft packaging material container and has a substantially elliptical column shape. The container 410 includes an upper plate 410A, a side plate 410B, and a bottom plate 410C. The upper plate 410A is provided with an outflow hole 111A for the liquid M stored in the container 410, and the side plate 410B and the bottom plate 410C are not provided with the outflow hole 111A.

That is, the upper plate 410A corresponds to the “first wall portion” of the present invention, and the side plate 410B and the bottom plate 410C correspond to the “second wall portion” of the present invention.

In addition, the container 410 constitutes a storage chamber 413 that is an internal space of the container 410 by the upper plate 410A, the side plate 410B, and the bottom plate 410C. The inner wall surface 410D of the bottom plate 410C faces the outflow hole 111A.

The impregnated body 412 has a different shape from the impregnated body 112 of the liquid storage unit 101. More specifically, the impregnated body 412 is C-shaped, and the end 112A of the impregnated body 412 is fitted into the outflow hole 111A.

The impregnated body 412 is provided in the storage chamber 413 so as to extend from the outflow hole 111A to the side plate 410B and the bottom plate 410C. The impregnated body 412 is provided along part of the upper plate 410A and part of the side plate 410B and the bottom plate 410C.

Also in the liquid storage unit 401, the liquid M in the storage chamber 413 is impregnated in the impregnated body 412 by the capillary phenomenon of the impregnated body 412 and sucked up to the outflow hole 111A. While the pump 104 is operating, the liquid M sucked into the outflow hole 111A is supplied to the liquid consumption unit 109 via the connecting pipe 107 and the pump 104 (see FIG. 4).

Here, the impregnated body 412 is provided in the storage chamber 413 so as to extend from the outflow hole 111A to the side plate 410B and the bottom plate 410C. More specifically, the impregnated body 412 is formed on a part of the inner wall surface 410E of the upper plate 410A, a part of the inner wall surface 410F of the side plate 410B, and a part of the inner wall surface 410D of the bottom plate 410C farthest from the outflow hole 111A. Extending along.

Therefore, even when the posture of the liquid storage unit 401 changes, the liquid M near the inner wall surface of at least one of the upper plate 410A, the side plate 410B, and the bottom plate 410C touches the impregnated body 412.

Therefore, in the liquid storage unit 401, even when the posture of the liquid storage unit 401 changes, the liquid M near the inner wall surface of at least one of the upper plate 410A, the side plate 410B, and the bottom plate 410C is caused by the capillary phenomenon of the impregnated body 412. The impregnated body 412 is impregnated and sucked up to the outflow hole 111A preferentially over the gas. Here, similarly to the impregnated body 112, the impregnated body 412 can also suck up the liquid M from the entire surface of the impregnated body 412.

Therefore, according to the liquid storage unit 401 of the fourth embodiment, there are the same effects as the liquid storage unit 101 of the first embodiment. Moreover, the liquid feeding device of the fourth embodiment including the liquid storage unit 401 also has the same effect as the liquid feeding device 100 of the first embodiment.

In this embodiment, the impregnated body 412 is provided in a C shape along a part of the upper plate 410A and a part of the side plate 410B and the bottom plate 410C. However, the present invention is not limited to this. For example, the impregnated body 412 may be provided in an annular shape along all of the upper plate 410A, the side plate 410B, and the bottom plate 410C.

In this embodiment, the bottom 412B of the impregnated body 412 is not in contact with the inner wall surface 410D of the bottom plate 410C farthest from the outflow hole 111A. However, the present invention is not limited to this. In implementation, the bottom 412B of the impregnated body 412 may be in contact with the inner wall surface 410D of the bottom plate 410C.

<< Other Embodiments >>
In the said embodiment, although the liquid feeding apparatus 100 is used for the medical use which transports glucose infusion, it is not restricted to this. For example, the liquid feeding device 100 may be used for fuel use for transporting liquid fuel.

In the above embodiment, glucose infusion is used as the liquid, but the present invention is not limited to this. For example, even if the liquid is another liquid such as insulin, it can be applied to the present liquid feeding device.

In the above embodiment, the liquid storage unit 101 is provided in the liquid feeding device 100, but is not limited thereto. For example, the liquid storage unit 101 may be detachably attached to the connecting pipe 107.

In the above-described embodiment, the pump 104 causes the diaphragm 145 to bend and vibrate by expansion and contraction of the piezoelectric element 146. However, the present invention is not limited to this. For example, the diaphragm 145 may be bent and vibrated by electromagnetic driving.

Further, the piezoelectric element 146 of the above embodiment may be composed of lead zirconate titanate ceramics, for example, a piezoelectric material of lead-free piezoelectric ceramics such as potassium sodium niobate and alkali niobate ceramics, etc. You may comprise.

In the embodiment, the rectangular parallelepiped container 110 and the elliptical columnar container 310 are used, but the shape of the container is not limited to this. The shape and number of the inner wall surface constituted by the containers 110 and 310 are not limited to this. For example, a spherical container constituting one curved inner wall surface or a conical container constituting two inner wall surfaces may be used.

Similarly, in the above embodiment, the impregnated bodies 112, 212, 312, and 412 having the shapes shown in FIGS. 3 and 7 to 10 are used, but the present invention is not limited to this. The impregnation body should just have the shape according to the shape of the container. For example, when a spherical container constituting a curved inner wall surface is used, the liquid storage unit may include an impregnated body in contact with all the wall surfaces that bulge outward when viewed from the inside of the container. preferable.

In the above embodiment, the filter 111B is provided in the container 110 to prevent the liquid from passing therethrough and allow the gas to pass through. However, the present invention is not limited to this. In implementation, a valve may be provided in the container 110 instead of the filter 111B.

It should be noted that the above description of the embodiment is an example in all respects and is not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

M ... Liquid 1 ... Supply device 2 ... Container 3 ... Device 4 ... Tube device 6 ... Corner 13 ... Hook 17 ... Tube 18 ... Tip 19 ... Conduit 21 ... Drip chamber 25 ... Conduit 30 ... Tube tightening device 31 ... Flow path 33 ... Conduit 100 ... Liquid feeding device 101 ... Liquid storage unit 104 ... Pump 107 ... Connecting pipe 108 ... Tube 109 ... Liquid consumption unit 110 ... Container 111A ... Outflow hole 111B ... Filter 112 ... Impregnated body 113 ... Storage chamber 141 ... Suction hole 142 ... discharge hole 143 ... first check valve 144 ... second check valve 145 ... diaphragm 146 ... piezoelectric element 148 ... pump chamber 149 ... pump casing 201 ... liquid storage part 210 ... container 212 ... impregnated body 301 ... liquid storage Section 310 ... Container 312 ... Impregnation body 313 ... Storage chamber 401 ... Liquid storage section 410 ... Container 412 ... Impregnation body 413 ... Storage chamber

Claims (10)

  1. A container having a first wall provided with a hole and a second wall connected to the first wall and forming a storage chamber together with the first wall, the liquid being stored in the storage chamber When,
    A liquid storage part, comprising: an impregnated body that extends from the hole to at least the second wall part and impregnates the liquid in the storage chamber.
  2. The first wall portion constitutes one wall surface in the container,
    The second wall portion constitutes at least one wall surface in the container,
    2. The liquid storage unit according to claim 1, wherein the impregnated body is at least in contact with a wall surface farthest from the hole among a plurality of wall surfaces configured by the first and second wall portions.
  3. The second wall portion constitutes the farthest wall surface facing the hole, and the side wall surface connecting the wall surface constituted by the first wall portion and the farthest wall surface,
    The liquid storage unit according to claim 2, wherein the impregnated body extends from the wall surface constituted by the first wall portion and contacts the farthest wall surface.
  4. The storage chamber is polyhedral,
    The liquid storage unit according to claim 2, wherein the impregnated body is in contact with all corners in the container.
  5. The impregnated body has a portion in contact with a peripheral edge of the wall surface constituted by the first wall portion and a peripheral edge of the farthest wall surface and connecting the peripheral edge of the wall surface and the peripheral edge of the farthest wall surface. The liquid storage unit according to any one of 2 to 4.
  6. 6. The liquid storage part according to claim 1, wherein the impregnated body is provided along at least a part of the first wall part and at least a part of the second wall part. .
  7. The first and second wall portions constitute curved wall surfaces,
    The liquid storage unit according to claim 1, wherein the impregnated body is in contact with all of the wall surfaces that bulge outward as viewed from the inside of the container on the curved wall surface.
  8. The liquid storage unit according to any one of claims 1 to 6, wherein the container includes a filter that blocks the passage of the liquid and allows a gas to pass therethrough.
  9. The liquid storage part according to any one of claims 1 to 8,
    A liquid feeding device comprising: a pump connected to the hole of the liquid storage unit and for feeding the liquid stored in the liquid storage unit.
  10. The pump includes a pump chamber into which the liquid flowing out from the hole flows, a diaphragm facing the pump chamber, and a driving body provided on one main surface of the diaphragm and bending and vibrating the diaphragm. The liquid delivery device according to claim 9, which is a diaphragm pump.
PCT/JP2014/051458 2013-02-26 2014-01-24 Liquid reservoir and liquid feeding device WO2014132712A1 (en)

Priority Applications (2)

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JP2014051458A JPWO2014132712A1 (en) 2013-02-26 2014-01-24 Liquid storage unit, liquid feeding device

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JP2003210923A (en) * 2002-01-23 2003-07-29 Kyocera Corp Separation body and container using the same
JP2005539364A (en) * 2002-09-18 2005-12-22 フォーメックス エル ピー Directionally independent liquid fuel reservoir
JP2005125670A (en) * 2003-10-24 2005-05-19 Sony Corp Liquid ejector
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