JP2014200351A - Drug solution administration device - Google Patents

Drug solution administration device Download PDF

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JP2014200351A
JP2014200351A JP2013076673A JP2013076673A JP2014200351A JP 2014200351 A JP2014200351 A JP 2014200351A JP 2013076673 A JP2013076673 A JP 2013076673A JP 2013076673 A JP2013076673 A JP 2013076673A JP 2014200351 A JP2014200351 A JP 2014200351A
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chemical
electrode
chemical solution
soft
administration device
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内山 城司
Joji Uchiyama
城司 内山
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Terumo Corp
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Terumo Corp
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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

本発明は、薬液投与装置に関する。   The present invention relates to a chemical solution administration device.

従来、インスリン等の薬液を使用者の体内に投与する薬液投与装置として、ポンプで所定量の薬液を送出し、当該薬液を継続的に体内に投与するものが知られている(例えば、特許文献1参照)。
特許文献1に記載の装置は、薬液を収容するリザーバー(薬液容器)と、リザーバーの流出口からカニューレに薬液を導く可撓性の導管と、導管内の薬液を送出するための手動の蠕動ポンプとを備え、使用者が押しボタンを押すたびに導管が蠕動ポンプで締め付けられ、所定量の薬液が送出されるように構成されている。
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.

特表2010−502364号公報Special table 2010-502364

特許文献1に記載されたような従来の装置では、薬液容器が軟質材料で形成されているため、薬液容器に規定量以上の薬液を充填することができてしまうという問題がある。これに対しては、例えば、リリーフ弁等の圧力調整弁を設けることが考えられるが、装置構成が複雑になってしまうという問題がある。   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.

本発明の主な目的は、簡易な構成で薬液の過充填を防止できる薬液投与装置を提供することにある。   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.

本発明の薬液投与装置は、変形可能な軟質部を有する薬液容器と、前記薬液容器に規定量を超える薬液が充填されたときに前記軟質部が及ぶ位置に設けられ、前記軟質部の当接により前記薬液の過充填を検知する過充填検知部とを備えていることを特徴とする。   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.

本発明によれば、変形した軟質部が過充填検知部に当接することを利用して薬液の過充填を検知するため、圧力調整弁等を設ける必要がなく、簡易な構成で薬液の過充填を防止することができる。   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.

本発明の薬液投与装置において、前記過充填検知部は、前記軟質部に設けられた電極パッドと、前記薬液が過充填されたときの前記電極パッドの軌跡上に設けられた電極とを備え、前記過充填検知部は、前記電極パッドと前記電極とが当接することで前記薬液の過充填を検知することが好ましい。
本発明によれば、電極と電極パッドとにより過充填検知部を構成することができるので、簡易かつ安価に過充填検知部を構成することができる。
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.

本発明の薬液投与装置において、前記薬液容器は、前記軟質部を覆うカバー部を備え、前記カバー部は、前記薬液が過充填されたときに前記軟質部が当接する当接面を有し、前記当接面には、前記軟質部側に開口し、前記電極を収容する電極収容部が設けられ、前記電極は、前記電極パッドとの当接部が前記電極収容部内に入り込んでいることが好ましい。
本発明によれば、電極における電極パッドとの当接部が電極収容部内に入り込んでいるため、軟質部が電極収容部に及んでから過充填を検知することになり、誤検知を防止することができる。
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.

本発明の薬液投与装置は、前記薬液容器に規定量の薬液が充填されたときに前記軟質部が及ぶ位置に設けられ、前記軟質部の当接により前記薬液の満充填を検知する満充填検知部を備えていることが好ましい。
本発明によれば、満充填検知部が設けられているため、過充填となる前に規定量の薬液が充填されたことを検知することができ、より確実に過充填を防止することができる。
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. .

本発明の一実施形態に係る薬液投与装置を示す分解斜視図。The disassembled perspective view which shows the chemical | medical solution administration apparatus which concerns on one Embodiment of this invention. 薬液容器の分解斜視図。The disassembled perspective view of a chemical | medical solution container. 薬液容器を下方から示す斜視図。The perspective view which shows a chemical | medical solution container from the downward direction. 薬液容器の断面斜視図。The cross-sectional perspective view of a chemical | medical solution container. 薬液容器の送液部の斜視図。The perspective view of the liquid feeding part of a chemical | medical solution container. 薬液ポンプの平面図。The top view of a chemical | medical solution pump. (A)は薬液ポンプの傘状弁の平面図。(B)は傘状弁の側面図。(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)および(B)は傘状弁の断面図。(A) And (B) is sectional drawing of an umbrella-shaped valve. 薬液充填時の薬液容器の作用を説明するための断面図。Sectional drawing for demonstrating the effect | action of the chemical | medical solution container at the time of chemical | medical solution filling. 薬液送出時の薬液容器の作用を説明するための断面図。Sectional drawing for demonstrating the effect | action of the chemical | medical solution container at the time of chemical | medical solution delivery. 本発明の変形例に係る傘状弁の断面図。Sectional drawing of the umbrella-shaped valve which concerns on the modification of this invention.

以下、本発明の一実施形態を図面に基づいて説明する。
図1において、薬液投与装置1は、筐体2と、使用者の皮膚に針やカテーテル等を穿刺する穿刺部3と、薬液を収容する薬液容器4と、薬液容器4内の薬液を穿刺部3に送出する薬液ポンプ5と、薬液ポンプ5の動作を制御する制御部6とを備えている。
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.

筐体2は、上部が開口した下筐体21と、下筐体21の開口を塞ぐ上筐体22とを備えている。下筐体21の開口内には、下筐体21と上筐体22とにより空間が形成され、当該空間内に、穿刺部3、薬液容器4、薬液ポンプ5、および制御部6が収容されている。このように、筐体2内に一式を収容することで、薬液投与装置1を小型かつ携帯可能に構成している。下筐体21の下面には、両面テープ等の貼付部材が設けられ、当該貼付部材により筐体2を使用者の皮膚に貼付可能となっている。   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.

穿刺部3は、押込部材31と、図示しない針やカテーテルの穿刺部材とを備え、押込部材31で穿刺部材を押し込むことで、当該穿刺部材を下筐体21の裏面から使用者の皮膚に穿刺可能となっている。   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.

薬液容器4は、図2から図5に示すように、変形可能な軟質部41と、所定の形状を有し、軟質部41とともに薬液収容空間40を形成する硬質部42と、軟質部41を挟んで硬質部42の反対側に設けられ、軟質部41を覆うカバー部43と、薬液収容空間40から薬液が流出する流出口441を有する送液部44と、薬液容器4に規定量を超える薬液が充填されたときに軟質部41が及ぶ位置に設けられ、軟質部41の当接により薬液の過充填を検知する過充填検知部45と、薬液容器4に規定量の薬液が充填されたときに軟質部41が及ぶ位置に設けられ、軟質部41の当接により薬液の満充填を検知する満充填検知部46とを備えている。この薬液容器4は、硬質部42が下筐体21側に向いた状態で筐体2内に収容されている。   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.

軟質部41は、親水性を有する材料、例えば、ポリエチレン、より好ましくは高密度ポリエチレン(ハイデンポリエチレンとも称する)で形成された薄膜であり、例えば、30〜50μmの厚さに形成されている。この軟質部41は、袋状に形成され、薬液の増減に合わせて薬液収容空間40の容積を追従可能な追従部411と、追従部411に沿って形成され、硬質部42とカバー部43とで挟持される平面状の外縁部412とを備えている。   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.

硬質部42は、ポリエチレン等の親水性を有する材料、好ましくは軟質部41と同じ材料で形成された所定形状の硬質部材で構成されている。この硬質部42は、軟質部41の追従部411と同程度の大きさおよび同程度の深さを有する凹部421を有している。凹部421の底面422には、円錐状に窪んで形成され、薬液収容空間40から離間する方向に傾斜した傾斜面428を有する窪み423と、窪み423の底部に設けられ、送液部44が嵌合する嵌合孔424とが設けられている。凹部421の側面425は、対向する側面425との間隔が底面422に向かうに従って狭くなる曲面状に形成されている。この側面425の底面422近傍には、薬液収容空間40に薬液を充填するための充填口426が設けられている。このような位置に充填口426を設けることにより、充填口426が薬液収容空間40に対して流出口441と同じ側に位置するとともに、充填口426を上方に向けたときに、充填口426が流出口441よりも下方に位置することになる。また、硬質部42に流出口441および充填口426を設けることで、このような位置関係を確実に規定することができる。充填口426は、ゴムや樹脂等の弾性部材で構成されたキャップ427で封止されている。   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.

カバー部43は、ポリエチレン等の親水性を有する材料、好ましくは軟質部41と同じ材料で形成された所定形状の硬質部材で構成され、軟質部41を保護可能に設けられている。このカバー部43は、軟質部41の追従部411と同程度の大きさおよび同程度の深さを有する凹部431を有している。この凹部431は、薬液容器4に規定量の薬液が充填されたときの軟質部41の形状に倣って形成され、薬液容器4に規定量の薬液が充填されたときに、当接面としての底面432および当接面としての側面435に軟質部41が当接するように形成されている。凹部431の底面432には、軟質部41側に開口し、2つの電極としての第1電極451を収容する第1電極収容部433が設けられている。凹部431の側面435は、対向する側面435との間隔が底面432に向かうに従って狭くなる曲面状に形成されている。この側面435の底面432近傍には、軟質部41側に開口し、それぞれ2つの第2電極461を収容する第2電極収容部434が2箇所に設けられている。   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.

送液部44は、親水性を有する材料、好ましくはポリエチレンで形成され、硬質部42に設けられている。この送液部44は、流出口441と、流出口441の周囲に設けられ、薬液収容空間40に向けて突出した複数の突出部442とを備えている。   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.

過充填検知部45は、第1電極451と、軟質部41に設けられた第1電極パッド452とを備えている。この過充填検知部45は、薬液の充填に伴い軟質部41が変形して第1電極パッド452と第1電極451とが当接することで過充填を検知可能に構成されている。第1電極451は、薬液容器4に規定量を超える薬液が充填されたときの第1電極パッド452の軌跡上であって、薬液が過充填されたときに軟質部41が及ぶ位置に設けられている。また、第1電極451は、第1電極収容部433に収容され、第1電極パッド452との当接部である先端が第1電極収容部433内に入り込んでいる。第1電極パッド452は、薄膜状に形成され、軟質部41の変形に合わせて変形可能とされている。   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.

満充填検知部46は、第2電極461と、軟質部41に設けられた第2電極パッド462とを備え、薬液の充填に伴い軟質部41が変形して第2電極パッド462と第2電極461とが当接することで満充填を検知可能に構成されている。第2電極461は、薬液容器4に規定量の薬液が充填されたときの第2電極パッド462の位置、すなわち薬液が満充填されたときに軟質部41が及ぶ位置に設けられている。各第2電極461は、先端が凹部431の形状に沿うように第2電極収容部434内に配置され、内側の第2電極461よりも外側の第2電極461の方が薬液収容空間側に突出している。第2電極パッド462は、薄膜状に形成され、軟質部41の変形に合わせて変形可能とされている。   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.

薬液ポンプ5は、図6に示すように、薬液が流入する薬液流入路51と、薬液が送出される薬液送出路52と、薬液流入路51と薬液送出路52とを接続する接続路53と、接続路53の途中に設けられ、当該接続路53に連通するシリンダ54と、シリンダ54内に摺動自在に設けられたピストン55と、薬液流入路51と接続路53との間に設けられ、接続路53から薬液流入路51への薬液の逆流を防止する第1逆止弁56と、薬液送出路52と接続路53との間に設けられ、薬液送出路52から接続路53への薬液の逆流を防止する第2逆止弁57と、前記ピストン55を駆動する駆動部58とを備えている。   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.

薬液流入路51、薬液送出路52、接続路53、シリンダ54、第1逆止弁56、および第2逆止弁57は、所定量の薬液を送出可能に構成された送液ブロック7に設けられている。送液ブロック7は、第1接続管11を介して薬液容器4に接続された流入側ブロック71と、第2接続管12を介して穿刺部3に接続された流出側ブロック72と、流入側ブロック71および流出側ブロック72に挟まれたシリンダブロック73とを備えている。   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.

薬液流入路51は、流入側ブロック71に設けられている。流入側ブロック71における薬液流入路51と接続路53との接続部分には、第1逆止弁56の弁座としての第1弁座711が設けられている。   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.

薬液送出路52は、流出側ブロック72に設けられている。流出側ブロック72における薬液送出路52と接続路53との接続部分には、第2逆止弁57を収容する第2収容空間720が設けられている。   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.

接続路53およびシリンダ54は、シリンダブロック73に設けられている。シリンダブロック73における接続路53と薬液流入路51との接続部分には、第1逆止弁56を収容する第1収容空間730が設けられている。シリンダブロック73における接続路53と薬液送出路52との接続部分には、第2逆止弁57の弁座としての第2弁座731が設けられている。   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.

第1逆止弁56は、図7および図8に示すように、軸部561と、軸部561の中程に設けられた傘部562とを備えた傘状弁(アンブレラバルブ)である。傘部562は、軸部561の外周面に沿った環状に形成されるとともに、当該外周面から軸部561の基端側に傾斜した形状とされている。この第1逆止弁56は、例えば、シリコンゴムにより形成され、硬度がHs30〜70(好ましくはHs40)、弾性係数が1〜25MPa(好ましくは5MPa)、ポアソン比が0.5、密度が1.12g/cmとされている。第1逆止弁56は、軸部561の基端が第1弁座711に設けられた凹部712に挿入されるとともに、軸部561の先端がシリンダブロック73に設けられた凹部732に挿入され、傘部562が第1弁座711に当接している。第1弁座711には、傘部562の下面563に臨む突状部713が設けられている。突状部713は、傘部562に沿って環状に形成されるとともに、傘部562の下面563に倣う傾斜面714を有している。すなわち、傾斜面714は、第1逆止弁56が閉じたときに傘部562の下面563全体と当接するように形成されている。傾斜面714の傾斜角は、例えば、8°に形成されている。 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 °.

第2逆止弁57は、第1逆止弁56と同様に構成され、第2弁座731は、第1弁座711と同様に構成されている。このため、第1逆止弁56および第2弁座731については、第1逆止弁56の構成の56の記号を57に置き換え、第1弁座711の構成の71の記号を73に置き換えることで説明ができるので、その説明を省略する。   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.

駆動部58は、回動モータ581と、回動モータ581の出力軸582に設けられた雄ねじ583と、出力軸582と平行にピストン55を支持するとともに、雄ねじ583が螺合する雌ねじ584が形成された移動部材585とを備えている。   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.

制御部6は、薬液ポンプ5を挟んで薬液容器4の反対側に設けられている。この制御部6は、CPU(Central Processing Unit)等の制御装置と、ROM(Read Only Memory)やRAM(Random Access Memory)等の記憶装置と、図示しない操作機器との間で情報の送受信を行う送受信装置と、これら装置が敷設された回路基板とを備えている。   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.

次に、薬液投与装置1において、インスリン等の薬液を使用者の体内に投与する際の手順を説明する。
先ず、使用者は、注射器で薬液を吸引する。次いで、薬液投与装置1をひっくり返した後、図9(A)に示すように、充填口426に注射針を刺し込み、薬液容器4内に薬液を充填する。薬液容器4内に充填された薬液は、軟質部41を押し下げ、当該軟質部41を徐々に下方に変形させる。これにより、薬液容器4内の薬液収容空間40の体積が増加するため、薬液容器4の内圧が所定値以下に維持される。
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.

ここで、薬液収容空間40や充填される薬液中には、気泡が含まれていることがある。この場合でも、充填口426が流出口441よりも下方に位置しているため、充填口426から充填された薬液で気泡を上方の流出口441に向けて押し出すことができ、当該気泡が流出口441から外部に抜けやすくなる。また、凹部421の側面425が曲面状に形成されるとともに、流出口441の周囲には、当該流出口441に向かって上方に傾斜した傾斜面428を有する窪み423が設けられている。このため、気泡を側面425や窪み423の傾斜面428に沿って流出口441に案内することができるとともに、窪み423を一時的な気泡貯まりとすることができる。   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.

その後、薬液が規定量充填されると、図9(B)に示すように、各第2電極パッド462が2つの第2電極461に当接し、第2電極461間が通電する。制御部6は、当該通電を検知すると、規定量の薬液が充填されたことをブザーやランプ等の図示しない報知手段で使用者に報知する。それにもかかわらず、さらに薬液を充填し続けると、図9(C)に示すように、軟質部41が第1電極収容部433内に入り込むことで、第1電極パッド452が2つの第1電極451に当接し、第1電極451間が通電する。制御部6は、当該通電を検知すると、薬液が過充填されたことを報知手段で使用者に報知する。   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.

薬液容器4への薬液の充填が完了したら、使用者は、薬液投与装置1を皮膚に貼付し、穿刺部3で針等を皮膚に穿刺した後、図示しない操作機器により、薬液の投与量、投与速度等を設定する。そして、使用者が操作機器を介して薬液の投与開始操作を行うと、制御部6が薬液ポンプ5を制御し、回動モータ581が出力軸582を一方の回転方向に回転させる。これにより、ピストン55が接続路53から離間して接続路53内が負圧状態となるため、図8(B)に示すように、第1逆止弁56の傘部562が第1弁座711から離れて当該第1逆止弁56が開き、薬液が接続路53に流れ込む。次いで、回動モータ581が出力軸582を他方の回転方向に回転させ、ピストン55を接続路53に接近させると、接続路53内が加圧状態となるため、図8(B)に示すように、第2逆止弁57が開き、接続路53内の薬液が薬液送出路52に送出される。これにより、所定量の薬液が穿刺部3から使用者の体内に投与される。   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.

ここで、各弁座711、731には、図8(A)に示すように、傘部562、572の下面563、573に倣う傾斜面714、734を有する突状部713、733が設けられている。このため、各逆止弁56、57が閉じている状態で、各傘部562、572と各弁座711、731との間の空間を小さくすることができ、いわゆるデッドボリュームを低減することができる。従って、薬液ポンプ5内に気泡が残留することを極力排除することができるので、操作機器で設定された所定量の薬液を確実に送出することができ、薬液ポンプ5からの薬液の送出量の精度を向上させることができる。   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.

その後も薬液ポンプ5により薬液が送出されると、規定量の薬液が収容された図10(A)に示す状態から、薬液容器4内の薬液が減少し、軟質部41が徐々に下方に変形する。これにより、薬液容器4内の薬液収容空間40の体積が減少するため、薬液容器4の内圧が所定値以上に維持される。そして、薬液容器4内の薬液が残り少なくなると、軟質部41が硬質部42の凹部421内に落ち込み、図10(B)に示すように、凹部421の底面422に当接し始める。この場合でも、複数の突出部442が流出口441の周囲に設けられているため、突出部442で軟質部41を流出口441から浮かせた状態にすることができ、軟質部41が流出口441を塞いでしまうことを防止することができる。これにより、残りの薬液を突出部442間の溝から流出口441に導くことができる。また、流出口441が硬質部42に設けられているため、流出口441がつぶれてしまうことを防止することができる。従って、薬液容器4内の薬液がなくなるまで、薬液を確実に送出し続けることができる。   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.

以上の本実施形態によれば、次のような効果がある。
すなわち、変形した軟質部41が過充填検知部45に当接することを利用して薬液の過充填を検知するため、圧力調整弁等を設ける必要がなく、簡易な構成で薬液の過充填を防止することができる。
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.

また、第1電極451と第1電極パッド452とにより過充填検知部45を構成することができるので、簡易かつ安価に過充填検知部45を構成することができる。   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.

また、第1電極451における第1電極パッド452との当接部が第1電極収容部433内に入り込んでいるため、軟質部41が第1電極収容部433に及んでから過充填を検知することになり、誤検知を防止することができる。   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.

また、満充填検知部46が設けられているため、過充填となる前に規定量の薬液が充填されたことを検知することができ、より確実に過充填を防止することができる。   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.

なお、本発明は前述の実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、薬液容器4において、軟質部41は、薬液の増減に合わせて薬液収容空間40の容積させることができれば、任意の材料で形成することができる。
硬質部42は、流出口441に気泡を案内できる形状であれば、前記実施形態のものに限らない。例えば、底面422が流出口441に向かって傾斜した形状としてもよいし、側面425を対向する側面425同士の間隔が底面422に向かうに従って狭くなる直線状に形成してもよい。
カバー部43は、前記実施形態のものに限らず、例えば、軟質部41の上方のみを覆うように形成したり、側面435を角筒状に形成したりしてもよい。
送液部44は、硬質部42の嵌合孔424に嵌合させる構成でなくてもよく、射出成形、押出成形、ブロー成形等で硬質部42と一体成形してもよい。
過充填検知部45および満充填検知部46は、過充填または満充填を検知可能な任意の構成を採用することができる。例えば、リミットスイッチや圧電素子が採用でき、軟質部41がリミットスイッチまたは圧電素子を押圧したときの電位変化により、過充填または満充填を検知するようにしてもよい。また、各電極パッド452、462は、軟質部41に設けられていなくてもよく、例えば、カバー部43で各電極パッド452、462を各電極451、461に対して近接離間可能に支持してもよい。
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.

薬液ポンプ5では、図11(A)および図11(B)に示すように、第1弁座711および第2弁座731に突状部としての複数の突起715、735を設け、当該複数の突起715、735を傘部562、572に沿って環状に配置してもよい。この際、各突起715、735を各弁座711、731における傘部562、572の基端近傍の位置に、すなわち各弁座711、731の凹部712の外縁部に設ければ、傘部562、572と弁座711、731との間のデッドボリュームを効果的に低減することができる。
また、突起715、735を各弁座711、731の凹部712の外縁部に沿って連続した環状に形成してもよい。
さらに、ピストン55は、駆動部58以外の駆動機器で駆動してもよいし、手動で駆動してもよい。
さらに、第1逆止弁56および第2逆止弁57の一方が、リフト式やボール式等の他の種類の逆止弁であってもよい。
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.

投与に用いる薬液としては、任意のものを使用することができ、例えば、インスリン、各種ホルモン、モルヒネ等の鎮痛薬、抗炎症剤等を使用することができる。   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.

本発明は、使用者に薬液を投与する薬液投与装置に利用できる他、他の医療用ポンプおよび当該医療用ポンプを備えた医療器具に利用できる。   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.

1 薬液投与装置
4 薬液容器
41 軟質部
43 カバー部
45 過充填検知部
46 満充填検知部
432 底面(当接面)
433 第1電極収容部(電極収容部)
451 第1電極(電極)
452 第1電極パッド(電極パッド)
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)

変形可能な軟質部を有する薬液容器と、
前記薬液容器に規定量を超える薬液が充填されたときに前記軟質部が及ぶ位置に設けられ、前記軟質部の当接により前記薬液の過充填を検知する過充填検知部とを備えていることを特徴とする薬液投与装置。
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.
請求項1に記載の薬液投与装置において、
前記過充填検知部は、
前記軟質部に設けられた電極パッドと、
前記薬液が過充填されたときの前記電極パッドの軌跡上に設けられた電極とを備え、
前記過充填検知部は、前記電極パッドと前記電極とが当接することで前記薬液の過充填を検知することを特徴とする薬液投与装置。
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.
請求項2に記載の薬液投与装置において、
前記薬液容器は、前記軟質部を覆うカバー部を備え、
前記カバー部は、前記薬液が過充填されたときに前記軟質部が当接する当接面を有し、
前記当接面には、前記軟質部側に開口し、前記電極を収容する電極収容部が設けられ、
前記電極は、前記電極パッドとの当接部が前記電極収容部内に入り込んでいることを特徴とする薬液投与装置。
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.
請求項1から請求項3のいずれかに記載の薬液投与装置において、
前記薬液容器に規定量の薬液が充填されたときに前記軟質部が及ぶ位置に設けられ、前記軟質部の当接により前記薬液の満充填を検知する満充填検知部を備えていることを特徴とする薬液投与装置。
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.
JP2013076673A 2013-04-02 2013-04-02 Drug solution administration device Pending JP2014200351A (en)

Priority Applications (1)

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Country Link
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