JP2009273514A - Liquid reservoir - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To feed a drive liquid to the side of a drive liquid pump at all times irrespective of a usage state of the drive liquid pump. <P>SOLUTION: A drive liquid reservoir 12 which is attachable to and detachable from a pump part 27 for sucking and discharging the drive liquid 50 and accumulates the drive liquid 50 to be fed to the pump part 27 includes a liquid absorption member 51 which extends from a liquid feeding port 12d for feeding the drive liquid 50 to the pump part 27 along the inner wall of the drive liquid reservoir 12 and absorbs the drive liquid 50 accumulated in the drive liquid reservoir 12 to feed the drive liquid 50 to the pump part 27 through the liquid absorption member 51. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid reservoir that stores the liquid to be supplied to the pump so as to be detachable from a pump that sucks and discharges a liquid that is a driving liquid or a chemical liquid.

  Conventionally, using a osmotic pump (see Non-Patent Document 1), a small amount of a drug solution of about 10 ml is continuously administered over a relatively long predetermined time of, for example, about one week.

  Moreover, when supplying the trace amount chemical | medical solution mentioned above, an electroosmotic flow pump is used (refer patent document 1). In this electroosmotic flow pump, the surface inside the pores of the electroosmotic material (porous body) is negatively charged, the positive ions become excessive near the surface, and the positive ions are forced by the electric field applied from the outside. The liquid is received and moved to generate a flow in the driving liquid, thereby discharging the driving liquid. For this reason, the electroosmotic flow pump can change the discharge amount of the driving liquid by changing the strength of the electric field.

Theewes F and Yum SI. Principles of the operation of genericosmotic pump for the delivery of semisolid or liquid drug formulations. Ann Biomed Eng 1976, 4 (4): 343-353 JP 2006-311796 A

  By the way, the electroosmotic pump described above is connected to a driving liquid reservoir that stores the driving liquid, and sucks and discharges the driving liquid supplied from the driving liquid reservoir. Here, when the suction port for sucking the driving liquid from the driving liquid reservoir is positioned on the vertical upper side, the electroosmotic pump discharges the driving liquid when the suction port and the driving liquid are not in contact with each other. There was a problem that could not be done. In other words, when an electroosmotic pump is used, in consideration of the arrangement state of the driving liquid reservoir, the suction port and the driving liquid are always in contact with each other, and the driving liquid is supplied to the pump side. There is a problem that the use state of the electroosmotic flow pump must be limited.

  The present invention has been made in view of the above, and an object of the present invention is to provide a liquid reservoir that can always supply a liquid that is a driving liquid or a chemical liquid to the pump side regardless of the usage state of the pump. .

  In order to solve the above-described problems and achieve the object, a liquid reservoir according to the present invention is a container for storing the liquid that is detachably attached to a pump that sucks and discharges a liquid that is a driving liquid or a chemical liquid and is supplied to the pump. A liquid reservoir that extends from the liquid supply port that supplies the liquid toward the pump along the inner wall of the liquid reservoir and absorbs the liquid stored in the liquid reservoir, The liquid is supplied to the pump through a liquid absorbing member. Here, the liquid supply port does not necessarily need to be entirely covered with the liquid absorbing member.

  In this case, the liquid absorbing member guides the liquid to the liquid supply port, so that the liquid can be stably supplied to the liquid supply port even if the posture of the liquid reservoir is changed. The liquid reservoir is a container that has a wall surface and can hold a liquid therein, but it may be a hard container or a soft container.

  The liquid reservoir according to the present invention is characterized in that, in the above invention, the liquid reservoir forms a cylindrical casing, and the liquid absorbing member covers at least the liquid supply port and a part of the inner wall side surface. And

  In the above invention, the liquid reservoir according to the present invention is a cylindrical housing whose inner wall section of the liquid reservoir is a polygonal shape, and the liquid absorbing member includes at least the liquid supply port and one side wall surface. It covers the side wall surfaces on both sides adjacent to.

  In the above invention, the liquid reservoir according to the present invention comprises a cylindrical housing having a polygonal inner wall cross section, and the liquid absorbing member is at least between the liquid supply port and the side wall surface. The corner portion is covered.

  In the liquid reservoir according to the present invention, in the above invention, the inner wall surface on which the liquid absorbing member is not covered is a flat surface or a curved surface or a cone surface that protrudes inward and decreases toward the liquid absorbing member side. It is characterized by being.

  In the liquid reservoir according to the present invention, in the above invention, the inner wall surface facing the liquid supply port is a flat surface or a curved surface or a cone surface that protrudes inward and decreases toward the liquid absorbing member. It is characterized by that.

  The liquid reservoir according to the present invention is characterized in that, in the above invention, the curved surface or the cone surface is lyophobic.

  In the liquid reservoir according to the present invention as set forth in the invention described above, the liquid absorbing member is a sheet-like member and is attached to the inner wall surface of the liquid reservoir.

  In the liquid reservoir according to the present invention, the sheet-like member is composed of a single sheet-like member.

  The liquid reservoir according to the present invention is characterized in that, in the above-described invention, the liquid absorbing member is formed so that the density is increased sequentially toward the liquid supply port side, and the transferability of the liquid is sequentially increased. .

  In the liquid reservoir according to the present invention, in the above-described invention, the liquid supply member of the liquid supply port is formed so that the density is gradually increased from the inner surface toward the outlet side, and the liquid transfer property is sequentially increased. It is characterized by.

  In the liquid reservoir according to the present invention as set forth in the invention described above, the liquid absorbing member of the liquid supply port is an elastic member.

  In the liquid reservoir according to the present invention as set forth in the invention described above, the outer surface of the liquid absorbing member of the liquid supply port has a convex shape toward the outside.

  According to this invention, the pump includes the liquid absorbing member that extends along the inner wall of the liquid reservoir from the liquid supply port for sucking the liquid, and absorbs the liquid stored in the liquid reservoir, through the liquid absorbing member. Since the liquid is supplied to the liquid supply port, the liquid can be supplied to the pump side even if the posture of the liquid reservoir is inclined.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a liquid reservoir according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment)
FIG. 1 is a diagram showing a state in which a chemical liquid administration device having a chemical liquid reservoir according to an embodiment of the present invention is applied to a living body such as a human body. In FIG. 1, in this medical solution administration device 1, a cannula main body that guides a chemical solution to a treatment target 2 whose tip portion is an affected part such as cancer is embedded in a living body 3, and a base portion thereof is on a body surface S of the living body 3. It has the cannula 1b arrange | positioned, and the chemical | medical solution part 1a which can be attached or detached with respect to the base 25 of the cannula 1b, and sends out a chemical | medical solution to the cannula 1b. This medicinal solution administration device 1 continuously applies a dozen ml of a medicinal solution, for example, an anticancer agent such as fluorouracil (5-FU), to a treatment target 2 such as cancer in a living body 3 over a long period of about one week. It is to be dispensed intensively.

  FIG. 2 is an exploded perspective view of the drug solution administration device 1 shown in FIG. FIG. 3 is a cross-sectional view of the drug solution administration device 1 shown in FIG. FIG. 4 is an exploded cross-sectional view of the drug solution administration device 1 shown in FIG. 2 to 4, the drug solution administration device 1 is mainly composed of a drug solution part 1 a and a cannula 1 b as described above. The drug solution part 1a is provided with a cylindrical drug solution reservoir 10 in which a coiled pipe is tightly wound twice and a drug solution is stored in the pipe, and an internal space of the cylindrical drug solution reservoir 10, and is substantially A driving liquid part 11 having a driving liquid reservoir 12 as a liquid reservoir that is covered with a cylindrical casing and stores at least a driving liquid for pushing out the chemical liquid, and an internal space of the chemical liquid reservoir 10 adjacent to the driving liquid part 11 And a drive unit 20 having at least a pump unit 27 realized by the electroosmotic flow pump 12 for extruding a driving liquid for extruding the chemical liquid and covered with a substantially cylindrical casing.

  The driving liquid section 11, the driving section 20, and the base section 25 each have a substantially cylindrical shape, and are sequentially assembled toward the cannula 1b side in the axial direction of the cylindrical inner space formed by the chemical liquid reservoir 10. The driving liquid unit 11 and the chemical liquid reservoir 10 are integrally formed as a chemical liquid driving unit 41, and the chemical liquid driving unit 41 is detachable from the driving unit 20.

  The driving liquid reservoir 12 in the driving liquid section 11 is coupled to the pump section 27 of the driving section 20 at the time of assembly by a driving liquid intake section 22 provided in the approximate center of the driving section 20. The output side of the pump unit 27 in the drive unit 20 is connected to the input side of the chemical solution reservoir 10 via the flow path F21 and the drive liquid discharge unit 21 in the drive unit 20 and the flow path F11 in the drive liquid unit 11. The The pipe of the chemical solution reservoir 10 is connected to the upper left side of the upper left in FIG. 3 → the lower outer side → the lower inner side → the upper inner side of the upper right side. The chemical liquid in the chemical liquid reservoir 10 is discharged to the chemical liquid reservoir 10 via the driving liquid discharge part 21 and the flow path F11 of the driving liquid part 11, so that the chemical liquid in the chemical liquid reservoir 10 flows in the flow path F12 of the driving liquid part 11 and the chemical liquid in the driving part 20. It is sent to the cannula 1b through the connecting part 43 and the chemical solution receiving part 23a provided in the base part 25. The chemical solution receiving unit 23a includes a one-way valve 23 that functions as a check valve that prevents the chemical solution from the living body 3 from flowing back because the pressure inside the body is high when the chemical solution driving unit 41 is removed. Provided.

  The drive unit 20 includes a pump drive unit 26 that drives and controls the pump unit 27. Further, a battery 13 is provided on the upper part of the driving fluid unit 11. An electrode 24 is provided on the joint surface between the driving unit 20 and the driving liquid unit 11, and energy supplied from the battery 13 is supplied to the pump driving unit 26 through at least the electrode 24.

  Between the driving liquid reservoir 12 and the chemical liquid reservoir 10, as described above, there is a pump unit 27 realized by an electroosmotic pump that pushes out the driving liquid for extruding the chemical liquid. The operating principle of the electroosmotic pump is that, as described above, the surface inside the pores of the electroosmotic material (porous body) is negatively charged, and in the vicinity of the surface, positive ions become excessive and added from the outside. The positive ions are moved by receiving a force by the electric field, and the driving liquid is discharged by causing the driving liquid to flow. Therefore, the ejection amount of the driving liquid can be changed by changing the intensity of the electric field. The driving liquid may be an electrolyte solution, and it is desirable to use ultrapure water or the like.

  The pump unit 27 acquires the driving liquid from the driving liquid reservoir 12 and pushes the driving liquid into the chemical liquid reservoir 10 to push out the chemical liquid indirectly to the cannula 25 outside the chemical liquid reservoir 10. Note that an air layer and oil are provided between the driving liquid and the chemical liquid so as not to be mixed with each other, thereby separating the driving liquid and the chemical liquid.

  Here, since the chemical liquid reservoir 10 and the driving liquid part 11 are integrally formed and can be attached to and detached from the driving part 20, consumables such as the chemical liquid in the chemical liquid reservoir 10, the driving liquid in the driving liquid reservoir 12, and the battery 13. Can be easily replaced as a unit.

  The medicinal solution reservoir 10 has medicinal solution administration information related to medicinal solution dosage, and has an information input unit 33 for inputting medicinal solution administration information specific to the medicinal solution reservoir. Here, the medicinal solution administration of the stored medicinal solution is performed. It is assembled with three protrusions indicating information as 3-bit information. Here, examples of the drug solution administration information include, but are not limited to, the standard dose (ml / h) of the drug solution per unit time, the maximum dose, and the effective dose of the drug solution. Of course, the information input unit 33 can have various modes other than the three protrusions.

  The medicinal solution administration information represents information indicating the dose of the medicinal solution in 3 bits, and is input to the pump drive unit 26 via the electrode 24. The pump drive unit 26 controls the drug solution dosage by controlling the pump unit 27 based on the input drug solution administration information. The chemical solution dose information may indicate time profile information related to the chemical solution dose. Here, it is preferable that the pump drive unit 26 stores specific drug solution dose information corresponding to bit information that is input drug solution dose information. Further, although the above-described 3 bits indicate eight types of drug solution administration information, the present invention is not limited to this, and an information input unit and an information detection unit corresponding to a larger number of bits may be provided. . Moreover, you may make it input chemical | medical solution administration information by taking the structure which makes the attachment position of the chemical | medical solution connection part 32 or the drive liquid connection part 31 correspond to the protrusion position (bit position) of the information input part 33. The information input unit 33 described above inputs the chemical administration information by physical contact. However, the information input unit 33 may input the chemical administration information by electrical contact. It is also possible to provide a memory chip or bit switch for storing bit information indicating medicinal solution administration information, so that the pump rear portion 26 reads the bit information with electrical contact when the medicinal solution reservoir 10 is mounted. Here, although it is difficult to change the chemical solution with the conventional osmotic pressure pump, in this embodiment, the chemical solution can be changed, and when the drug type is changed, a new dose can be dealt with. And as above-mentioned, by providing chemical | medical solution administration information, when changing a chemical | medical solution, the dose setting mistake by a human error can be prevented.

  Here, the liquid absorption is performed on the inner wall surface of the driving liquid reservoir 12 and on the inner bottom surface and the inner side surface on the driving liquid intake section 22 side, and the driving liquid is supplied to the driving liquid intake section 22 side. A member 51 is provided.

  FIG. 5 is a cross-sectional view showing the configuration of the driving liquid reservoir 12 and the pump unit 27. In FIG. 5, the drive liquid reservoir 12 is formed with a substantially cylindrical space, and as described above, the liquid absorbing member 51 is attached to each of the inner bottom face 12c and the inner side face 12b on the drive liquid intake section 22 side. . Thus, the liquid absorbing member 51 is continuously laid along the inner wall (the inner bottom surface 12 and the inner side surface 12b) of the driving liquid reservoir 12 from the liquid supply port 12d that supplies the driving liquid toward the pump unit 27. . That is, a cylindrical liquid absorbing member 51 having a bottom as shown in FIG. 6 is provided. Further, the inner upper surface 12a is formed with a substantially circular plane. An air hole 60 is provided in the inner upper surface 12a.

  The liquid absorbing member 51 is realized by a sheet-like porous material such as glass fiber paper, pulp, or synthetic fiber, for example, and may be a material having flexibility, liquid absorption, hydrophilicity, and liquid retention. preferable. Of course, it may be a porous ceramic. The liquid absorbing member 51 absorbs the driving liquid 50 by the capillary phenomenon due to the porosity, and guides the driving liquid 50 to the driving liquid intake section 22.

  On the other hand, the pump unit 27 has an electroosmotic flow material 54 sandwiched between an inlet electrode 53 and an outlet electrode 55 in the flow path. The inlet electrode 53 and the outlet electrode 55 are supplied with a direct current or pulse from the pump driving unit 26. An electric current is applied, and the discharge flow rate of the driving liquid 50 is controlled. The inlet electrode 53, the outlet electrode 55, and the electroosmotic flow material 54 are formed of a porous material. The inlet chamber 57 on the inlet electrode 53 side is provided with a liquid absorbing member 52 made of a porous material that connects the driving liquid intake unit 22 and the inlet electrode 53, and guides the driving liquid 50 to the inlet electrode 53 side. The liquid absorbing member 52 is formed of a porous material similar to the liquid absorbing member 51, and is coupled to the liquid absorbing member 51 when the driving liquid portion 11, that is, the driving liquid reservoir 12 is attached to the driving portion 20. In addition, the protection sheet is affixed to the exposed portions of the liquid absorbing members 51 and 52 corresponding to the driving fluid intake unit 22 before mounting, and the protection sheet is peeled off when mounting. In addition, a bubble isolation member 59 is provided on the outlet side of the outlet chamber 58 on the outlet electrode 55 side so as to allow the driving liquid 50 to pass therethrough and prevent the passage of gas and foreign matter. The bubble separating member 59 is a hydrophilic film made of a polyamide-based polymer material such as glass fiber or hydrophilic nylon (R). Further, generated gas discharge ports 56a to 56d are formed on the side surfaces of the inlet chamber 57 and the outlet chamber 58, and only the generated gas is discharged to the outside. The generated gas discharge ports 56a to 56d including the air hole 60 described above may be formed using a hydrophobic and gas permeable film or sheet such as PTFE.

  By sticking the liquid absorbing member 51 to the inner surface of the drive liquid reservoir 12 in this way, as shown in FIG. 7, for example, the drive liquid intake part 22 is positioned vertically upward and the drive liquid 50 is small. Even so, the driving liquid 50 is reliably supplied to the pump unit 27 side by causing the liquid absorbing member 51 to function as a flow path. That is, the driving liquid 50 is always supplied to the pump unit 27 regardless of the usage state of the driving liquid reservoir 12, and the driving liquid 50 is discharged from the pump unit 27. The liquid absorbing member 51 may be attached to the upper surface 12a. When the liquid absorbing member 51 is not attached to the upper surface 12a, the surface of the upper surface 12a is preferably hydrophobic. For example, it is preferable to coat a fluororesin or the like.

  Further, it is preferable that the liquid absorbing member 51 in the vicinity of the driving liquid intake portion 22 is formed so as to have a higher sequential density in the flow direction of the driving liquid 50 and to increase the transmission of the sequential driving liquid 50. For example, as shown in FIG. 8, along the bottom surface 12 c, a porous material having a high density is sequentially formed in the order of the liquid absorbing members 51 a → 51 b → 51 c to enhance the transmission of the driving liquid 50. Note that forming the sequential density higher means arranging the driving liquid suction force by capillary action from low to high. Thereby, a micro pump is formed in the liquid absorbing member 51, and the liquid absorbing property and the transmission property of the driving liquid 50 are enhanced only by the liquid absorbing member 51. In FIG. 8, the density is arranged stepwise, but the present invention is not limited to this, and a continuous density gradient may be provided. Further, as shown in FIG. 9, liquid absorbing members 61a → 61b → 61c are arranged in multiple layers in order of increasing density in the flow direction orthogonal to the bottom surface 12c so as to improve the transferability of the driving liquid 50. Also good.

  Incidentally, in the above-described embodiment, the liquid absorbing members 51 and 52 in the driving liquid intake section 22 are combined when the driving liquid reservoir 12 is mounted. However, in order to securely combine the connecting portions, FIG. As shown in FIG. 4, the liquid absorbing member 72 corresponding to the liquid absorbing member 52 is formed with a convex portion on the coupling portion side, and the liquid absorbing member 51 is formed with a liquid absorbing member 73 formed of an elastic member. At the time of coupling with the liquid member 73, it is preferable that the coupling with the liquid absorbing member 73 is ensured and dense by pressing the liquid absorbing member 72. The liquid absorbing member 73 may be a rigid plate member, and the convex portion of the liquid absorbing member 72 may be formed of an elastic member. Further, the liquid absorbing member 73 side may be convex and the liquid absorbing member 72 side may be planar.

  In the above-described embodiment, the case where the internal shape of the driving fluid reservoir 12 is a cylindrical shape has been described. However, the present invention is not limited to this, and the internal shape may be a prismatic shape. In this case, for example, as shown in FIG. 11, only the upper surface is opened, and the liquid absorbing member 81 having a quadrangular prism shape having the bottom surface is attached to the inner wall of the driving liquid reservoir.

  Further, in this case, as shown in FIGS. 12 and 13 (plan view of FIG. 12), the side wall surface of the polygonal column shape is only the liquid absorbing member 91a that covers the side wall surfaces on both sides adjacent to one exposed side wall surface. It is good. Even with such a configuration, the driving liquid 50 can be reliably supplied regardless of the state of use of the driving liquid reservoir. In particular, it is preferable that the liquid absorbing member attached to the driving liquid reservoir is integrally formed in a sheet shape, but the liquid absorbing member 91 shown in FIGS. 12 and 13 is formed only by folding one rectangular sheet member. This makes it easy to form the liquid absorbing member.

  Further, in the case of a driving liquid reservoir having a polygonal column shape, a liquid absorbing member is provided only at the corner portion of the side wall surface extending from the driving liquid water intake portion 22 and the driving liquid water intake portion 22 so that the other side wall surfaces are exposed. May be. For example, in the case of the square columnar driving liquid reservoir shown in FIG. 14, the liquid absorbing member 92a may be provided only at the corners and bottom of the four corners. Further, in this case, as shown in FIG. 15, it is preferable that the liquid absorbing members 93a are provided at the four corners, and the cross section of the exposed side wall surface of the driving liquid reservoir is convex, and each surface 11a is hydrophobic. Is preferred.

  Here, in the above-described embodiment, the driving liquid reservoir having the columnar inner shape has been described. However, the present invention is not limited to this. For example, a mortar-shaped or driving liquid intake section having a bottom 101a corresponding to the driving liquid intake section 22 is used. In this case, as shown in FIG. 16, the liquid absorbing member 101 corresponding to the internal shape may be formed along the bottom portion 101a and the side wall surface. Further, the driving liquid reservoir may have a closed shape (conical shape) like an egg type, and in this case, a liquid absorbing member is provided on the entire inner side wall surface.

  In the above-described embodiment, the upper surface 12a of the driving liquid reservoir is described as a flat surface. However, the present invention is not limited to this, and the upper surface 102 is preferably formed in a convex shape or a cone shape. In particular, even when the driving liquid reservoir is disposed vertically upside down, the driving liquid 50 gathers at the corner of the bottom of the convex shape, and the liquid absorbing member 51 is disposed at the corner. Therefore, the driving liquid 50 can be reliably guided to the driving liquid intake section 22 side. Note that the surface of the upper surface 102 is preferably hydrophobic.

  Furthermore, in the above-described embodiment, the driving liquid unit 11 and the chemical liquid reservoir 10 have been described as being integrally formed. However, the present invention is not limited to this, and as shown in FIGS. The reservoir 10 may be further separable.

  In the above-described embodiment, the driving liquid reservoir that accumulates the driving liquid such as driving water and the pump unit that is the electroosmotic pump that discharges the driving liquid have been described as examples. Instead of the driving liquid reservoir, the chemical liquid reservoir and the pump unit may be directly connected, and the pump unit may directly discharge the chemical liquid in the chemical liquid reservoir. The pump unit is not limited to the electroosmotic pump, and a peristaltic pump may be used.

  In the above-described embodiment, the example in which the driving water is guided to the liquid supply opening using the liquid absorbing member has been described. However, the present invention can be used not only for driving water but also for use for guiding a chemical solution to a liquid supply opening.

It is a schematic diagram which shows the state by which the chemical | medical solution administration apparatus which has a chemical | medical solution reservoir concerning embodiment of this invention was applied to the biological body. It is a disassembled perspective view of the chemical | medical solution administration apparatus shown in FIG. It is sectional drawing of the chemical | medical solution administration apparatus shown in FIG. FIG. 2 is an exploded cross-sectional view of the drug solution administration device shown in FIG. 1. It is sectional drawing which shows the structure of a chemical | medical solution reservoir and a pump part. It is a perspective view which shows the structure of a liquid absorption member. It is a figure which shows the supply state of a driving fluid in case a driving fluid intake part is located in the vertical upper side. It is a schematic diagram which shows an example which implement | achieves the micro pump by a liquid absorption member. It is a schematic diagram which shows the other example which implement | achieves the micro pump by a liquid absorption member. It is sectional drawing which shows the coupling state between the liquid absorption members of a drive liquid reservoir and a pump part. It is a perspective view which shows an example of a structure of a liquid absorption member in case a drive fluid reservoir is a square pillar shape. It is a perspective view which shows the other example of a structure of the liquid absorption member in case a drive liquid reservoir is a square pillar shape. It is a top view of the liquid absorption member shown in FIG. FIG. 10 is a plan view showing another example of the configuration of the liquid absorbing member when the driving liquid reservoir has a quadrangular prism shape. FIG. 6 is a plan view showing a modified example of the driving liquid reservoir with respect to the arrangement of the liquid absorbing member shown in FIG. 4. It is a perspective view which shows the structure of the liquid absorption member in case a drive liquid reservoir is mortar shape. It is sectional drawing which shows the structure of the modification of the upper wall surface of a drive fluid reservoir. It is a disassembled perspective view of the modification of the chemical | medical solution administration apparatus shown in FIG. It is sectional drawing of the modification of the chemical | medical solution administration apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chemical liquid administration apparatus 1a Chemical liquid part 1b Cannula 2 Treatment object 3 Living body 10 Chemical liquid reservoir 11 Drive liquid part 12d Liquid supply port 12 Drive liquid reservoir 13 Battery 20 Drive part 21 Drive liquid discharge part 22 Drive liquid intake part 23 One-way valve 23a Chemical liquid Receiving part 24 Electrode 25 Base 26 Pump drive part 27 Pump part 33 Information input part 41 Chemical liquid drive part 43 Chemical liquid connection part 50 Drive liquid 51, 52, 51a-51c, 61a-61c, 62a, 72, 73, 81, 91, 91a, 92a, 93a, 101 Liquid-absorbing member 53 Inlet electrode 54 Electroosmotic flow material 55 Outlet electrode 56a-56d Generated gas exhaust port 57 Inlet chamber 58 Outlet chamber 59 Bubble isolation member 60 Air hole F11, F12, F21 Channel S Body surface

Claims (13)

A liquid reservoir that is a container for storing the liquid that is removably attached to a pump that sucks and discharges a liquid that is a driving liquid or a chemical liquid;
A liquid absorbing member that extends along the inner wall of the liquid reservoir from a liquid supply port that supplies the liquid toward the pump, and absorbs the liquid stored in the liquid reservoir; Is supplied to the pump.   The liquid reservoir according to claim 1, wherein the liquid reservoir forms a cylindrical housing, and the liquid absorbing member covers at least the liquid supply port and a part of an inner wall side surface.   The liquid reservoir has a cylindrical casing whose inner wall section has a polygonal shape, and the liquid absorbing member covers at least the liquid supply port and side wall surfaces on both sides adjacent to one side wall surface. Item 3. A liquid reservoir according to Item 1 or 2.   3. The liquid reservoir has a cylindrical casing whose inner wall cross section is polygonal, and the liquid absorbing member covers at least the liquid supply port and a corner between the side wall surfaces. The liquid reservoir as described.   The inner wall surface that is not covered with the liquid absorbing member is a flat surface, or a curved surface or a cone surface that protrudes inward and decreases toward the liquid absorbing member. Liquid reservoir according to one.   The inner wall surface facing the liquid supply port is a flat surface, or a curved surface or a cone surface that protrudes inward and becomes lower toward the liquid absorbing member. A liquid reservoir as described in.   The liquid reservoir according to claim 5 or 6, wherein the curved surface or the cone surface is lyophobic.   The liquid reservoir according to claim 1, wherein the liquid absorbing member is a sheet-like member and is attached to the inner wall surface of the liquid reservoir.   The liquid reservoir according to claim 8, wherein the sheet-like member of the liquid-absorbing member is composed of only one sheet-like member.   10. The liquid reservoir according to claim 1, wherein the liquid absorbing member is formed so as to have a higher density sequentially toward the liquid supply port side, and the liquid transfer property is sequentially increased. .   The liquid-absorbing member of the liquid supply port is formed so that the density is increased sequentially from the inner surface toward the outlet side, and the transferability of the liquid is sequentially increased. The liquid reservoir as described.   The liquid reservoir according to claim 1, wherein the liquid absorbing member of the liquid supply port is an elastic member.   The liquid reservoir according to any one of claims 1 to 11, wherein an outer surface of the liquid absorbing member of the liquid supply port has a convex shape toward the outside.

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