JP2014200351A - Drug solution administration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drug solution administration device that can prevent excessive loading of a drug solution with a simple configuration.SOLUTION: The drug solution administration device includes: a drug solution container 4 having a deformable soft part 41; and an excessive loading detecting part 45 provided in a position at which the soft part 41 arrives when a drug solution is loaded in the drug solution container 4 with an amount more than a prescribed amount, and for detecting an excessive loading of the drug solution by the abutment of the soft part 41.

Description

  The present invention relates to a chemical solution administration device.

2. Description of the Related Art Conventionally, as a chemical solution administration device that administers a chemical solution such as insulin into a user's body, a device that sends a predetermined amount of the chemical solution with a pump and continuously administers the chemical solution into the body is known (for example, Patent Documents). 1).
The device described in Patent Document 1 includes a reservoir (chemical solution container) that stores a chemical solution, a flexible conduit that guides the chemical solution from the outlet of the reservoir to the cannula, and a manual peristaltic pump for delivering the chemical solution in the conduit Each time the user presses the push button, the conduit is tightened with a peristaltic pump, and a predetermined amount of chemical solution is delivered.

Special table 2010-502364

  In the conventional apparatus as described in Patent Document 1, since the chemical solution container is formed of a soft material, there is a problem that the chemical solution container can be filled with a predetermined amount or more of the chemical solution. For this, for example, a pressure regulating valve such as a relief valve may be provided, but there is a problem that the device configuration becomes complicated.

  A main object of the present invention is to provide a chemical solution administration device capable of preventing overfilling of a chemical solution with a simple configuration.

  The medicinal solution administration device of the present invention is provided with a medicinal solution container having a deformable soft portion and a position where the soft portion reaches when the medicinal solution container is filled with a medicinal solution exceeding a specified amount, and the soft portion abuts. And an overfill detector for detecting overfilling of the chemical solution.

  According to the present invention, it is not necessary to provide a pressure adjusting valve or the like because the deformed soft part is in contact with the overfill detection part, so that it is not necessary to provide a pressure adjustment valve or the like, and the chemical liquid is overfilled with a simple configuration. Can be prevented.

In the drug solution administration device of the present invention, the overfill detection unit includes an electrode pad provided in the soft part, and an electrode provided on a trajectory of the electrode pad when the drug solution is overfilled, It is preferable that the overfill detection unit detects overfilling of the chemical liquid by contacting the electrode pad and the electrode.
According to the present invention, since the overfill detection unit can be configured by the electrode and the electrode pad, the overfill detection unit can be configured easily and inexpensively.

In the medicinal solution administration device of the present invention, the medicinal solution container includes a cover portion that covers the soft portion, and the cover portion has a contact surface with which the soft portion comes into contact when the medicinal solution is overfilled, The contact surface is provided with an electrode housing portion that opens to the soft portion side and houses the electrode, and the electrode has a contact portion with the electrode pad entering the electrode housing portion. preferable.
According to the present invention, since the contact portion of the electrode with the electrode pad enters the electrode housing portion, overfilling is detected after the soft portion reaches the electrode housing portion, thereby preventing erroneous detection. Can do.

The chemical liquid administration device of the present invention is provided at a position where the soft part reaches when the chemical liquid container is filled with a predetermined amount of chemical liquid, and detects full filling of the chemical liquid by contact of the soft part It is preferable to provide the part.
According to the present invention, since the full-fill detection unit is provided, it is possible to detect that the prescribed amount of the chemical solution is filled before overfilling, and it is possible to more reliably prevent overfilling. .

The disassembled perspective view which shows the chemical | medical solution administration apparatus which concerns on one Embodiment of this invention. The disassembled perspective view of a chemical | medical solution container. The perspective view which shows a chemical | medical solution container from the downward direction. The cross-sectional perspective view of a chemical | medical solution container. The perspective view of the liquid feeding part of a chemical | medical solution container. The top view of a chemical | medical solution pump. (A) is a top view of the umbrella-shaped valve of a chemical | medical solution pump. (B) is a side view of an umbrella-shaped valve. (A) And (B) is sectional drawing of an umbrella-shaped valve. Sectional drawing for demonstrating the effect | action of the chemical | medical solution container at the time of chemical | medical solution filling. Sectional drawing for demonstrating the effect | action of the chemical | medical solution container at the time of chemical | medical solution delivery. Sectional drawing of the umbrella-shaped valve which concerns on the modification of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, a drug solution administration device 1 includes a housing 2, a puncture unit 3 that punctures a user's skin with a needle, a catheter, and the like, a drug solution container 4 that stores a drug solution, and a puncture unit that stores a drug solution in the drug solution container 4. 3 is provided with a chemical liquid pump 5 to be sent to 3 and a control unit 6 for controlling the operation of the chemical liquid pump 5.

  The housing 2 includes a lower housing 21 whose upper portion is open, and an upper housing 22 that closes the opening of the lower housing 21. In the opening of the lower housing 21, a space is formed by the lower housing 21 and the upper housing 22, and the puncture unit 3, the chemical solution container 4, the chemical solution pump 5, and the control unit 6 are accommodated in the space. ing. Thus, by accommodating a set in the housing 2, the drug solution administration device 1 is configured to be small and portable. An adhesive member such as a double-sided tape is provided on the lower surface of the lower housing 21, and the housing 2 can be applied to the user's skin by the adhesive member.

  The puncture unit 3 includes a push-in member 31 and a puncture member for a needle or catheter (not shown). By pushing the puncture member with the push-in member 31, the puncture member is punctured from the back surface of the lower housing 21 into the user's skin. It is possible.

  As shown in FIGS. 2 to 5, the chemical solution container 4 includes a deformable soft portion 41, a hard portion 42 having a predetermined shape and forming a chemical solution containing space 40 together with the soft portion 41, and the soft portion 41. It is provided on the opposite side of the hard part 42 across the cover part 43 that covers the soft part 41, the liquid supply part 44 that has the outlet 441 through which the chemical liquid flows out from the chemical liquid storage space 40, and exceeds the prescribed amount in the chemical liquid container 4. An overfill detection unit 45 is provided at a position where the soft part 41 reaches when the chemical liquid is filled, and detects overfilling of the chemical liquid by contact of the soft part 41, and the chemical liquid container 4 is filled with a prescribed amount of the chemical liquid. A full-fill detection unit 46 that is provided at a position where the soft portion 41 sometimes reaches and detects the full-filling of the chemical liquid by the contact of the soft portion 41 is provided. The chemical solution container 4 is accommodated in the housing 2 with the hard portion 42 facing the lower housing 21 side.

  The soft part 41 is a thin film formed of a hydrophilic material, for example, polyethylene, more preferably high-density polyethylene (also referred to as highden polyethylene), and has a thickness of, for example, 30 to 50 μm. The soft portion 41 is formed in a bag shape, is formed along the follower 411 that can follow the volume of the chemical solution storage space 40 in accordance with the increase or decrease of the chemical solution, the follower 411, and the hard portion 42 and the cover portion 43. And a planar outer edge portion 412 sandwiched between the two.

  The hard portion 42 is formed of a hard member having a predetermined shape formed of a hydrophilic material such as polyethylene, preferably the same material as the soft portion 41. The hard part 42 has a concave part 421 having the same size and the same depth as the follower part 411 of the soft part 41. The bottom surface 422 of the recess 421 is formed in a conical recess and has a recess 423 having an inclined surface 428 inclined in a direction away from the chemical solution storage space 40, and a bottom of the recess 423. A mating hole 424 is provided. The side surface 425 of the recess 421 is formed in a curved surface shape such that the distance from the opposite side surface 425 becomes narrower toward the bottom surface 422. Near the bottom surface 422 of the side surface 425, a filling port 426 for filling the chemical solution storage space 40 with the chemical solution is provided. By providing the filling port 426 at such a position, the filling port 426 is positioned on the same side as the outflow port 441 with respect to the chemical solution storage space 40, and when the filling port 426 is directed upward, It will be located below the outflow port 441. Further, by providing the outflow port 441 and the filling port 426 in the hard portion 42, such a positional relationship can be reliably defined. The filling port 426 is sealed with a cap 427 made of an elastic member such as rubber or resin.

  The cover portion 43 is formed of a hard member having a predetermined shape formed of a hydrophilic material such as polyethylene, preferably the same material as the soft portion 41, and is provided so as to protect the soft portion 41. The cover portion 43 has a concave portion 431 having the same size and the same depth as the follower portion 411 of the soft portion 41. The concave portion 431 is formed following the shape of the soft portion 41 when the chemical solution container 4 is filled with a prescribed amount of chemical solution, and serves as a contact surface when the chemical solution container 4 is filled with the prescribed amount of chemical solution. The soft portion 41 is formed so as to contact the bottom surface 432 and the side surface 435 as the contact surface. The bottom surface 432 of the recess 431 is provided with a first electrode housing portion 433 that opens to the soft portion 41 side and houses the first electrode 451 as two electrodes. The side surface 435 of the recess 431 is formed in a curved surface shape such that the distance from the opposite side surface 435 decreases toward the bottom surface 432. In the vicinity of the bottom surface 432 of the side surface 435, two second electrode housing portions 434 that open to the soft portion 41 side and house two second electrodes 461, respectively, are provided.

  The liquid feeding part 44 is formed of a hydrophilic material, preferably polyethylene, and is provided in the hard part 42. The liquid feeding part 44 includes an outlet 441 and a plurality of protrusions 442 provided around the outlet 441 and protruding toward the chemical solution storage space 40.

  The overfill detection unit 45 includes a first electrode 451 and a first electrode pad 452 provided on the soft part 41. The overfilling detection unit 45 is configured to detect overfilling when the soft part 41 is deformed with the filling of the chemical solution and the first electrode pad 452 and the first electrode 451 come into contact with each other. The first electrode 451 is provided on the locus of the first electrode pad 452 when the chemical solution container 4 is filled with a chemical solution exceeding a specified amount, and is provided at a position where the soft part 41 reaches when the chemical solution is overfilled. ing. The first electrode 451 is housed in the first electrode housing portion 433, and the tip that is a contact portion with the first electrode pad 452 enters the first electrode housing portion 433. The first electrode pad 452 is formed in a thin film shape and can be deformed in accordance with the deformation of the soft portion 41.

  The full-fill detection unit 46 includes a second electrode 461 and a second electrode pad 462 provided on the soft part 41. The soft part 41 is deformed as the chemical solution is filled, and the second electrode pad 462 and the second electrode 461 is configured to be able to detect full filling. The second electrode 461 is provided at the position of the second electrode pad 462 when the chemical liquid container 4 is filled with a prescribed amount of chemical liquid, that is, at the position where the soft part 41 reaches when the chemical liquid is fully filled. Each second electrode 461 is disposed in the second electrode housing portion 434 so that the tip thereof follows the shape of the recess 431, and the second electrode 461 outside the inner second electrode 461 is closer to the chemical solution housing space. It protrudes. The second electrode pad 462 is formed in a thin film shape and can be deformed in accordance with the deformation of the soft portion 41.

  As shown in FIG. 6, the chemical liquid pump 5 includes a chemical liquid inflow path 51 through which the chemical liquid flows in, a chemical liquid delivery path 52 through which the chemical liquid is delivered, and a connection path 53 that connects the chemical liquid inflow path 51 and the chemical liquid delivery path 52. The cylinder 54 provided in the middle of the connection path 53, communicated with the connection path 53, the piston 55 slidably provided in the cylinder 54, and provided between the chemical liquid inflow path 51 and the connection path 53. The first check valve 56 for preventing the backflow of the chemical liquid from the connection path 53 to the chemical liquid inflow path 51 and the chemical liquid delivery path 52 and the connection path 53 are provided, and the chemical liquid delivery path 52 to the connection path 53 is provided. A second check valve 57 for preventing the back flow of the chemical solution and a drive unit 58 for driving the piston 55 are provided.

  The chemical solution inflow path 51, the chemical solution delivery path 52, the connection path 53, the cylinder 54, the first check valve 56, and the second check valve 57 are provided in the liquid supply block 7 configured to be able to deliver a predetermined amount of chemical liquid. It has been. The liquid feeding block 7 includes an inflow side block 71 connected to the drug solution container 4 via the first connection pipe 11, an outflow side block 72 connected to the puncture section 3 via the second connection pipe 12, and an inflow side. And a cylinder block 73 sandwiched between the block 71 and the outflow side block 72.

  The chemical solution inflow path 51 is provided in the inflow side block 71. A first valve seat 711 as a valve seat of the first check valve 56 is provided at a connection portion between the chemical solution inflow passage 51 and the connection passage 53 in the inflow side block 71.

  The chemical solution delivery path 52 is provided in the outflow side block 72. A second accommodation space 720 for accommodating the second check valve 57 is provided at a connection portion between the chemical solution delivery path 52 and the connection path 53 in the outflow side block 72.

  The connection path 53 and the cylinder 54 are provided in the cylinder block 73. A first accommodation space 730 for accommodating the first check valve 56 is provided at a connection portion between the connection path 53 and the chemical liquid inflow path 51 in the cylinder block 73. A second valve seat 731 as a valve seat of the second check valve 57 is provided at a connection portion between the connection path 53 and the chemical solution delivery path 52 in the cylinder block 73.

As shown in FIGS. 7 and 8, the first check valve 56 is an umbrella valve (an umbrella valve) including a shaft portion 561 and an umbrella portion 562 provided in the middle of the shaft portion 561. The umbrella portion 562 is formed in an annular shape along the outer peripheral surface of the shaft portion 561 and has a shape inclined from the outer peripheral surface to the proximal end side of the shaft portion 561. The first check valve 56 is made of, for example, silicon rubber, has a hardness of Hs 30 to 70 (preferably Hs 40), an elastic modulus of 1 to 25 MPa (preferably 5 MPa), a Poisson's ratio of 0.5, and a density of 1 .12 g / cm ³ . In the first check valve 56, the base end of the shaft portion 561 is inserted into the recess 712 provided in the first valve seat 711, and the tip of the shaft portion 561 is inserted into the recess 732 provided in the cylinder block 73. The umbrella portion 562 is in contact with the first valve seat 711. The first valve seat 711 is provided with a protruding portion 713 that faces the lower surface 563 of the umbrella portion 562. The projecting portion 713 is formed in an annular shape along the umbrella portion 562 and has an inclined surface 714 that follows the lower surface 563 of the umbrella portion 562. That is, the inclined surface 714 is formed so as to contact the entire lower surface 563 of the umbrella portion 562 when the first check valve 56 is closed. The inclination angle of the inclined surface 714 is, for example, 8 °.

  The second check valve 57 is configured in the same manner as the first check valve 56, and the second valve seat 731 is configured in the same manner as the first valve seat 711. Therefore, for the first check valve 56 and the second valve seat 731, the symbol 56 in the configuration of the first check valve 56 is replaced with 57, and the symbol 71 in the configuration of the first valve seat 711 is replaced with 73. Since it can be explained, the explanation is omitted.

  The drive unit 58 includes a rotation motor 581, a male screw 583 provided on the output shaft 582 of the rotation motor 581, and a female screw 584 that supports the piston 55 in parallel with the output shaft 582 and is screwed with the male screw 583. The moving member 585 is provided.

  The control unit 6 is provided on the opposite side of the chemical liquid container 4 with the chemical liquid pump 5 interposed therebetween. The control unit 6 transmits and receives information between a control device such as a CPU (Central Processing Unit), a storage device such as a ROM (Read Only Memory) and a RAM (Random Access Memory), and an operation device (not shown). A transmission / reception device and a circuit board on which these devices are laid are provided.

Next, a procedure for administering a drug solution such as insulin into the user's body in the drug solution administration apparatus 1 will be described.
First, the user sucks the drug solution with a syringe. Next, after the medicinal solution administration device 1 is turned over, as shown in FIG. 9A, an injection needle is inserted into the filling port 426 to fill the medicinal solution container 4 with the medicinal solution. The chemical solution filled in the chemical solution container 4 pushes down the soft portion 41 and gradually deforms the soft portion 41 downward. Thereby, since the volume of the chemical | medical solution storage space 40 in the chemical | medical solution container 4 increases, the internal pressure of the chemical | medical solution container 4 is maintained below a predetermined value.

  Here, bubbles may be contained in the chemical solution storage space 40 or the filled chemical solution. Even in this case, since the filling port 426 is positioned below the outflow port 441, the bubbles can be pushed out toward the upper outflow port 441 by the chemical liquid filled from the filling port 426, and the bubbles are discharged from the outflow port 441. It becomes easy to come out from 441 outside. In addition, the side surface 425 of the recess 421 is formed in a curved shape, and a recess 423 having an inclined surface 428 inclined upward toward the outlet 441 is provided around the outlet 441. For this reason, while being able to guide a bubble to the outflow port 441 along the inclined surface 428 of the side surface 425 or the hollow 423, the hollow 423 can be used as a temporary bubble storage.

  Thereafter, when a prescribed amount of chemical solution is filled, as shown in FIG. 9B, each second electrode pad 462 comes into contact with the two second electrodes 461 and the second electrode 461 is energized. When the control unit 6 detects the energization, the control unit 6 notifies the user that a prescribed amount of the chemical solution has been filled by a notifying unit (not shown) such as a buzzer or a lamp. Nevertheless, if the chemical solution is further filled, as shown in FIG. 9C, the soft portion 41 enters the first electrode housing portion 433, so that the first electrode pad 452 has two first electrodes. The first electrode 451 is energized by contacting the 451. When the control unit 6 detects the energization, the control unit 6 notifies the user that the chemical solution is overfilled by a notification unit.

  When the filling of the drug solution into the drug solution container 4 is completed, the user attaches the drug solution administration device 1 to the skin, punctures the skin with a needle or the like with the puncture unit 3, and then uses the operation device (not shown) Set the administration rate. And if a user performs administration start operation of a chemical | medical solution via an operating device, the control part 6 will control the chemical | medical solution pump 5, and the rotation motor 581 will rotate the output shaft 582 to one rotation direction. As a result, the piston 55 is separated from the connection path 53 and the connection path 53 is in a negative pressure state, so that the umbrella portion 562 of the first check valve 56 is moved to the first valve seat as shown in FIG. The first check valve 56 is opened away from 711, and the chemical solution flows into the connection path 53. Next, when the rotation motor 581 rotates the output shaft 582 in the other rotation direction to bring the piston 55 closer to the connection path 53, the inside of the connection path 53 is in a pressurized state, and as shown in FIG. Then, the second check valve 57 is opened, and the chemical solution in the connection path 53 is sent to the chemical solution delivery path 52. As a result, a predetermined amount of drug solution is administered from the puncture unit 3 into the user's body.

  Here, as shown in FIG. 8A, the valve seats 711 and 731 are provided with protruding portions 713 and 733 having inclined surfaces 714 and 734 that follow the lower surfaces 563 and 573 of the umbrella portions 562 and 572, respectively. ing. For this reason, in the state which each check valve 56 and 57 is closed, the space between each umbrella part 562 and 572 and each valve seat 711 and 731 can be made small, and what is called dead volume can be reduced. it can. Accordingly, it is possible to eliminate bubbles remaining in the chemical liquid pump 5 as much as possible, so that a predetermined amount of chemical liquid set by the operating device can be reliably delivered, and the amount of chemical liquid delivered from the chemical liquid pump 5 can be reduced. Accuracy can be improved.

  After that, when the chemical solution is delivered by the chemical solution pump 5, the chemical solution in the chemical solution container 4 decreases from the state shown in FIG. 10A in which the prescribed amount of the chemical solution is accommodated, and the soft portion 41 is gradually deformed downward. To do. Thereby, since the volume of the chemical | medical solution storage space 40 in the chemical | medical solution container 4 reduces, the internal pressure of the chemical | medical solution container 4 is maintained more than predetermined value. When the chemical solution in the chemical solution container 4 becomes small, the soft portion 41 falls into the concave portion 421 of the hard portion 42 and starts to contact the bottom surface 422 of the concave portion 421 as shown in FIG. Even in this case, since the plurality of projecting portions 442 are provided around the outflow port 441, the soft portion 41 can be floated from the outflow port 441 by the projecting portion 442. Can be prevented from being blocked. Accordingly, the remaining chemical liquid can be guided from the groove between the protrusions 442 to the outlet 441. Moreover, since the outflow port 441 is provided in the hard part 42, it can prevent that the outflow port 441 collapses. Therefore, the chemical liquid can be reliably delivered until the chemical liquid in the chemical liquid container 4 runs out.

According to the above embodiment, the following effects are obtained.
That is, since the deformed soft portion 41 is in contact with the overfill detection unit 45 to detect overfilling of the chemical solution, it is not necessary to provide a pressure adjusting valve or the like, and the overfilling of the chemical solution is prevented with a simple configuration. can do.

  In addition, since the overfill detection unit 45 can be configured by the first electrode 451 and the first electrode pad 452, the overfill detection unit 45 can be configured easily and inexpensively.

  Further, since the contact portion of the first electrode 451 with the first electrode pad 452 enters the first electrode housing portion 433, the soft portion 41 detects overfilling after reaching the first electrode housing portion 433. As a result, erroneous detection can be prevented.

  In addition, since the full-filling detection unit 46 is provided, it can be detected that a prescribed amount of chemical solution has been filled before overfilling, and overfilling can be prevented more reliably.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the chemical solution container 4, the soft portion 41 can be formed of an arbitrary material as long as the volume of the chemical solution storage space 40 can be increased according to the increase or decrease of the chemical solution.
The hard part 42 is not limited to that of the above embodiment as long as it can guide the air bubbles to the outlet 441. For example, the bottom surface 422 may be inclined toward the outlet 441, or the side surfaces 425 may be formed in a linear shape in which the distance between the side surfaces 425 facing each other decreases toward the bottom surface 422.
The cover part 43 is not limited to that of the above embodiment, and for example, the cover part 43 may be formed so as to cover only the upper part of the soft part 41, or the side surface 435 may be formed in a rectangular tube shape.
The liquid feeding part 44 may not be configured to be fitted in the fitting hole 424 of the hard part 42, and may be integrally formed with the hard part 42 by injection molding, extrusion molding, blow molding or the like.
The overfill detection unit 45 and the full-fill detection unit 46 can employ any configuration capable of detecting overfill or full-fill. For example, a limit switch or a piezoelectric element can be used, and overfilling or full filling may be detected by a potential change when the soft part 41 presses the limit switch or the piezoelectric element. In addition, the electrode pads 452 and 462 may not be provided in the soft part 41. For example, the cover part 43 supports the electrode pads 452 and 462 so as to be close to and away from the electrodes 451 and 461. Also good.

In the chemical pump 5, as shown in FIGS. 11A and 11B, the first valve seat 711 and the second valve seat 731 are provided with a plurality of protrusions 715 and 735 as protruding portions, The protrusions 715 and 735 may be annularly arranged along the umbrella portions 562 and 572. At this time, if the projections 715 and 735 are provided at positions near the base ends of the umbrella portions 562 and 572 in the valve seats 711 and 731, that is, at the outer edge portions of the recesses 712 of the valve seats 711 and 731, the umbrella portions 562. , 572 and the valve seats 711, 731 can be effectively reduced.
Further, the protrusions 715 and 735 may be formed in a continuous ring shape along the outer edge of the recess 712 of each valve seat 711 and 731.
Furthermore, the piston 55 may be driven by a drive device other than the drive unit 58 or may be driven manually.
Furthermore, one of the first check valve 56 and the second check valve 57 may be another type of check valve such as a lift type or a ball type.

  As the drug solution used for administration, any drug can be used. For example, insulin, various hormones, analgesics such as morphine, anti-inflammatory agents and the like can be used.

  INDUSTRIAL APPLICABILITY The present invention can be used for a medical solution administration device that administers a chemical solution to a user, as well as other medical pumps and medical devices including the medical pump.

DESCRIPTION OF SYMBOLS 1 Chemical solution administration apparatus 4 Chemical solution container 41 Soft part 43 Cover part 45 Overfilling detection part 46 Full filling detection part 432 Bottom face (contact surface)
433 1st electrode accommodating part (electrode accommodating part)
451 First electrode (electrode)
452 First electrode pad (electrode pad)

Claims (4)

A chemical container having a deformable soft part;
An overfill detection unit that is provided at a position where the soft part reaches when the chemical liquid container is filled with a chemical liquid that exceeds a prescribed amount, and that detects overfilling of the chemical liquid by contact of the soft part; A medicinal-solution administration device. In the chemical solution administration device according to claim 1,
The overfill detector is
An electrode pad provided on the soft part;
An electrode provided on the trajectory of the electrode pad when the chemical solution is overfilled,
The overfilling detection unit detects overfilling of the liquid medicine when the electrode pad and the electrode are in contact with each other. The drug solution administration device according to claim 2,
The chemical solution container includes a cover portion that covers the soft portion,
The cover portion has a contact surface with which the soft portion comes into contact when the chemical solution is overfilled,
The contact surface is provided with an electrode accommodating portion that opens to the soft portion side and accommodates the electrode,
The drug solution administration device, wherein a contact portion of the electrode with the electrode pad enters the electrode housing portion. In the chemical solution administration device according to any one of claims 1 to 3,
A full-fill detection unit is provided at a position where the soft part reaches when the chemical liquid container is filled with a predetermined amount of chemical liquid, and detects the full-fill of the chemical liquid by contact of the soft part. A chemical solution administration device.

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