JP5631603B2 - Injection tool and chemical injection system equipped with the same - Google Patents

Injection tool and chemical injection system equipped with the same Download PDF

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JP5631603B2
JP5631603B2 JP2010024685A JP2010024685A JP5631603B2 JP 5631603 B2 JP5631603 B2 JP 5631603B2 JP 2010024685 A JP2010024685 A JP 2010024685A JP 2010024685 A JP2010024685 A JP 2010024685A JP 5631603 B2 JP5631603 B2 JP 5631603B2
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chemical solution
storage chamber
switching valve
chemical
container
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JP2011160886A (en
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山田 圭一
圭一 山田
正行 漆間
正行 漆間
雅規 平松
雅規 平松
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Daiken Iki Co Ltd
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Description

本発明は、薬液注入装置から吐出された薬液を所定量充填するとともに、使用者の操作に応じて前記所定量の薬液を導出するように構成された注入用具に関するものである。   The present invention relates to an injection device configured to fill a predetermined amount of a chemical solution discharged from a chemical solution injection device and to derive the predetermined amount of the chemical solution according to a user's operation.

従来から前記注入用具として、例えば、特許文献1には、加圧下の液体源を供給するための液体源供給手段と、制御されたボウラス投与量の液体を提供するためのボウラス投与量装置と、液体の定常的な流量を調整するための手段とを含むアセンブリが開示されている。前記ボウラス投与量装置は、前記液体源供給手段からの液体を充填可能な投与量溜めを有し、この投与量溜めは、圧縮されることによりその内容物を排出することができるようになっている。   Conventionally, as the infusion device, for example, Patent Document 1 discloses a liquid source supply means for supplying a liquid source under pressure, a bolus dosage device for providing a liquid with a controlled bolus dosage, An assembly is disclosed that includes means for adjusting the steady flow rate of the liquid. The bolus dose device has a dose reservoir that can be filled with the liquid from the liquid source supply means, and the dose reservoir can discharge its contents by being compressed. Yes.

特表平03−505538号公報Japanese translation of PCT publication No. 03-505538

しかしながら、特許文献1のボウラス投与量装置では、投与量溜めに充填された薬液を患者の体内へ注入するために、使用者に大きな力が要求されるという問題があった。具体的に、前記投与量溜めに充填された薬液を患者へ注入するためには、フィルターやカテーテルといった流通抵抗の大きな部材を介して薬液を押し流す必要があり、この流れを生成するために投与量溜めを圧縮する力は非常に大きなものとなる。   However, the bolus dose device of Patent Document 1 has a problem that a large force is required from the user in order to inject the drug solution filled in the dose reservoir into the patient's body. Specifically, in order to inject a drug solution filled in the dose reservoir into a patient, it is necessary to push the drug solution through a member having a large flow resistance such as a filter or a catheter. The force to compress the reservoir is very large.

本発明は、上記課題に鑑みてなされたものであり、薬液注入のために使用者に要求される力を軽減することができる注入用具及びこれを備えた薬液注入システムを提供することを目的としている。   This invention is made | formed in view of the said subject, and aims at providing the injection | pouring tool which can reduce the force requested | required of the user for chemical | medical solution injection | pouring, and a chemical | medical solution injection | pouring system provided with the same. Yes.

上記課題を解決するために、本発明は、加圧された薬液を吐出可能な吐出部に接続されるものであり、前記吐出部からの薬液を充填するとともに、使用者の操作に応じて所定量の薬液を導出するように構成された注入用具であって、薬液の流量を調整するための調整部を介して前記吐出部から吐出された薬液を収容可能に構成され、前記薬液の収容に応じて拡張する一方、縮小させることに応じて収容された薬液を導出可能な収容室と、前記収容室の拡張に伴い付勢力を蓄えつつ弾性変形可能な付勢手段と、前記収容室から導出された薬液を患者側へ導くための導出通路と、前記導出通路による薬液の導出を阻止するための閉鎖位置と、前記導出通路による薬液の導出を許容する開放位置との間で切換可能な切換弁と、前記収容室内に前記所定量の薬液が収容された状態で、使用者の操作を受けることにより前記切換弁を前記閉鎖位置から開放位置へ切換可能な操作部とを備え、前記操作部を用いて前記切換弁を開放位置に切り換えることにより、前記付勢手段に蓄えられた付勢力によって前記収容室を縮小させて前記収容室内に収容された薬液を導出させ、前記注入用具は、前記収容室を内部に有するとともに所定の伸縮軸に沿って伸縮可能な伸縮容器をさらに備え、前記付勢手段は、前記伸縮軸に沿った伸縮容器の伸張に応じて前記伸縮軸に沿って縮むことにより、前記収容室内に前記所定量の薬液が充填されるまでの間に前記伸縮容器が伸張する力よりも小さな付勢力であり、かつ、前記切換弁が閉鎖位置から開放位置に切り換えられたときに前記収容室内の薬液の全てを導出可能な付勢力を生じさせる弾性係数を有する弾性部材を有していることを特徴とする注入用具を提供する。 In order to solve the above-described problems, the present invention is connected to a discharge unit capable of discharging a pressurized chemical solution, and is filled with the chemical solution from the discharge unit, and in accordance with a user's operation. An injection device configured to derive a fixed amount of chemical solution, configured to be able to store the chemical solution discharged from the discharge unit via an adjustment unit for adjusting the flow rate of the chemical solution, and to store the chemical solution A storage chamber that can be expanded according to the contraction, and can store the chemical liquid stored in response to the contraction; an urging means that can be elastically deformed while accumulating the urging force associated with the expansion of the storage chamber; Switchable between a lead-out path for guiding the liquid medicine to the patient side, a closed position for preventing the liquid medicine from being led out by the lead-out path, and an open position allowing the liquid medicine to be led out by the lead-out path A valve and said place in said containment chamber An operation unit capable of switching the switching valve from the closed position to the open position by receiving a user's operation in a state in which an amount of the chemical solution is accommodated, and the switching valve is opened using the operation unit. By switching to, the accommodating chamber is reduced by the urging force stored in the urging means to lead out the medicinal solution accommodated in the accommodating chamber, and the injection device has the accommodating chamber inside and a predetermined amount. along the telescopic shaft further comprises a retractable telescopic container, wherein the biasing means, by condensation Mukoto along said telescopic shaft with an extension of the telescopic container along the telescopic shaft, the plants in the housing chamber The biasing force is smaller than the force by which the telescopic container expands until a fixed amount of chemical solution is filled , and all of the chemical solution in the storage chamber when the switching valve is switched from the closed position to the open position. Lead It provides an injection tool, characterized in that an elastic member having an elastic coefficient that causes a biasing force as possible.

本発明によれば、付勢手段に蓄えられた付勢力によって収容室を縮小させて当該収容室内に収容された薬液を導出させることができるので、薬液注入のために使用者に要求される力を軽減することができる。つまり、本発明によれば、使用者が操作部を操作して切換弁を開放位置に切り換えれば、それ以上の力を与えることなく付勢手段の付勢力を利用して収容室内の薬液を導出させることができるため、薬液の導出のために使用者に要求される力としては切換弁を開放位置に切り換えるための力に抑えることができる。したがって、本発明によれば、薬液注入のために使用者に要求される力を軽減することができる。   According to the present invention, since the storage chamber can be reduced by the biasing force stored in the biasing means and the chemical liquid stored in the storage chamber can be led out, the force required for the user to inject the chemical liquid Can be reduced. In other words, according to the present invention, when the user operates the operating portion to switch the switching valve to the open position, the chemical solution in the storage chamber is discharged using the biasing force of the biasing means without applying any more force. Since it can be derived, the force required for the user to derive the chemical solution can be suppressed to the force for switching the switching valve to the open position. Therefore, according to this invention, the force requested | required of a user for chemical | medical solution injection | pouring can be reduced.

なお、本発明では、収容部に対する薬液導入側に吐出部からの薬液の流量を調整する(絞る)調整部が設けられるとともに、この調整部が収容部の導出側(カテーテルやフィルター)に比べて大きな流通抵抗を有するものであるため、切換弁が開放位置に切り換えられた状態において、収容部内の薬液は流通抵抗の小さい導出側へ優先して流れることになる。   In the present invention, an adjustment unit that adjusts (squeezes) the flow rate of the chemical solution from the discharge unit is provided on the chemical solution introduction side with respect to the storage unit, and this adjustment unit is compared to the outlet side (catheter or filter) of the storage unit. Since it has a large flow resistance, in a state where the switching valve is switched to the open position, the chemical solution in the storage portion flows preferentially to the outlet side where the flow resistance is small.

また、本発明によれば、薬液を導入して伸縮容器を伸張させることにより弾性部材を縮ませて当該弾性部材の付勢力を蓄えることができる。したがって、この構成によれば、弾性部材の付勢力により伸縮性容器を縮ませることによって当該伸縮性容器内の薬液を導出することができる。 Further , according to the present invention , the elastic member can be contracted by introducing the chemical solution and extending the expansion / contraction container, and the urging force of the elastic member can be stored. Therefore, according to this structure, the chemical | medical solution in the said elastic container can be derived | led-out by shrinking an elastic container with the urging | biasing force of an elastic member.

さらに、本発明によれば、収容室内に所定量の薬液が充填される長さまで伸縮容器を確実に伸長させることができるとともに、この伸張動作に応じて蓄えられた弾性部材の付勢力によって伸縮容器内の薬液を導出することができる。 Furthermore, according to the present invention , the expansion / contraction container can be reliably extended to a length in which the predetermined amount of the chemical solution is filled in the storage chamber, and the expansion / contraction container is applied by the urging force of the elastic member stored according to the extension operation. The chemical solution inside can be derived.

具体的に、前記弾性部材は、コイルばねから構成することができる。   Specifically, the elastic member can be composed of a coil spring.

前記注入用具において、前記吐出部から吐出された薬液を前記収容室に導くための導入通路をさらに備え、前記導入通路の少なくとも一部を構成するものとして、前記調整部を備えていることが好ましい。   Preferably, the injection device further includes an introduction passage for guiding the chemical solution discharged from the discharge portion to the storage chamber, and the adjustment portion is provided as at least a part of the introduction passage. .

この構成によれば、調整部に規定される流量を複数種類準備することにより、収容室内に所定量の薬液が充填されるのに要する時間(ロックアウトタイム)の異なる複数品種の注入用具を提供することができる。   According to this configuration, by providing a plurality of types of flow rates defined by the adjustment unit, it is possible to provide a plurality of types of injection devices having different times (lockout times) required for filling a predetermined amount of chemical liquid into the accommodation chamber can do.

また、本発明は加圧された薬液を吐出可能な吐出部に接続されるものであり、前記吐出部からの薬液を充填するとともに、使用者の操作に応じて所定量の薬液を導出するように構成された注入用具であって、薬液の流量を調整するための調整部を介して前記吐出部から吐出された薬液を収容可能に構成され、前記薬液の収容に応じて拡張する一方、縮小させることに応じて収容された薬液を導出可能な収容室と、前記収容室の拡張に伴い付勢力を蓄えつつ弾性変形可能な付勢手段と、前記収容室から導出された薬液を患者側へ導くための導出通路と、前記導出通路による薬液の導出を阻止するための閉鎖位置と、前記導出通路による薬液の導出を許容する開放位置との間で切換可能な切換弁と、前記収容室内に前記所定量の薬液が収容された状態で、使用者の操作を受けることにより前記切換弁を前記閉鎖位置から開放位置へ切換可能な操作部とを備え、前記操作部を用いて前記切換弁を開放位置に切り換えることにより、前記付勢手段に蓄えられた付勢力によって前記収容室を縮小させて前記収容室内に収容された薬液を導出させ、前記注入用具は、前記収容室を内部に有するとともに所定の伸縮軸に沿って伸縮可能な伸縮容器をさらに備え、前記付勢手段は、前記伸縮軸に沿った伸縮容器の伸張に応じて前記伸縮軸に沿って縮み、かつ、前記収容室内に前記所定量の薬液が充填されるまでの間に前記伸縮容器が伸張する力よりも小さな付勢力を生じさせる弾性係数を有する弾性部材を有し、前記切換弁は、前記導出通路を開閉可能な開閉部と、前記操作部と係合することにより、前記開閉部を閉鎖位置から開放位置に変位させるための前記操作部による操作が可能となる被操作部とを備え、前記所定量の薬液が前記収容室内に収容された状態において前記操作部と前記被操作部とが係合し、かつ、前記収容室内に収容された薬液が前記所定量よりも予め設定された量以上少ない場合にはこの不足量の分だけ前記収容室が縮んでいることによって前記操作部と前記被操作部との係合が規制されることを特徴とする注入用具を提供する Further, the present invention is intended to be connected to pressurized liquid medicine ejection portion capable of ejecting, to fill a drug solution from the discharge unit derives a predetermined amount of liquid medicine according to the user's operation The injection device configured as described above, and configured to be able to store the chemical solution discharged from the discharge unit via the adjustment unit for adjusting the flow rate of the chemical solution, while expanding according to the storage of the chemical solution, A storage chamber capable of deriving a medical solution stored in response to the reduction, an urging means capable of elastic deformation while accumulating an urging force accompanying expansion of the storage chamber, and a medical solution derived from the storage chamber on the patient side A switching passage that is switchable between a lead-out passage for leading to the lead, a closed position for preventing the lead-out of the chemical solution through the lead-out passage, and an open position that allows the lead-out of the chemical solution through the lead-out passage; Contains the predetermined amount of the chemical solution. And an operation unit capable of switching the switching valve from the closed position to the open position by receiving a user's operation, and using the operation unit to switch the switching valve to the open position, The storage chamber is contracted by the biasing force stored in the biasing means to draw out the chemical solution stored in the storage chamber, and the injection device has the storage chamber inside and can be expanded and contracted along a predetermined expansion / contraction axis An elastic container, and the biasing means contracts along the telescopic axis according to the expansion of the elastic container along the telescopic axis, and the container chamber is filled with the predetermined amount of the chemical solution. An elastic member having an elastic coefficient that generates an urging force smaller than a force by which the expandable container extends, and the switching valve is engaged with the opening / closing portion capable of opening / closing the lead-out passage, and the operation portion By doing And an operated portion that can be operated by the operating portion for displacing the opening / closing portion from a closed position to an open position, and the operating portion in a state where the predetermined amount of the chemical solution is accommodated in the accommodating chamber. When the operated portion is engaged and the amount of the chemical stored in the storage chamber is smaller than the predetermined amount by a predetermined amount or more, the storage chamber is contracted by the shortage amount. Thus, the injection tool is provided in which the engagement between the operation portion and the operated portion is restricted.

この構成によれば、収容室内に所定量の薬液が充填されるまでの間に操作部が操作されても開閉部が閉鎖位置に維持されるため、所定量に満たない薬液の導出を阻止することができる。したがって、前記構成によれば、目的とする効能を得るために予め定められた量(前記所定量)の薬液を確実に患者に投与することが可能となるため、有効な薬液投与を実現することができるとともに、所定量に満たない薬液を導入してしまうことにより再度所定量を満たすために余分な時間を要するといった不具合を抑制することもできる。   According to this configuration, even if the operation unit is operated before the storage chamber is filled with a predetermined amount of the chemical solution, the opening / closing portion is maintained in the closed position, so that the chemical solution less than the predetermined amount is prevented from being led out. be able to. Therefore, according to the above configuration, it is possible to reliably administer a predetermined amount (predetermined amount) of the medicinal solution to the patient in order to obtain a target effect, and thus realize effective medicinal solution administration. In addition, it is possible to suppress a problem that extra time is required to satisfy the predetermined amount again by introducing a chemical solution that is less than the predetermined amount.

前記注入用具において、前記切換弁は、前記導出通路を介した薬液の導出終了に至る前記収容室の縮小に応じて前記開放位置から前記閉鎖位置へ切り換えられることが好ましい。   In the injection device, it is preferable that the switching valve is switched from the open position to the closed position in accordance with the reduction of the storage chamber that reaches the end of the lead-out of the chemical solution through the lead-out passage.

この構成によれば、導出通路を介した薬液の導出終了とともに切換弁を閉鎖位置に自動的に切り換えることができるため、使用者により切換弁を閉鎖位置から開放位置にする操作が行なわれるだけで所定量の薬液を確実に患者へ投与することができるとともに、この投与の後に自動的に収容室内への薬液の充填が開始されることになる。   According to this configuration, the switching valve can be automatically switched from the closed position to the open position when the discharge of the chemical solution through the outlet passage is completed, so that the user only has to perform the operation of moving the switching valve from the closed position to the open position. A predetermined amount of the drug solution can be reliably administered to the patient, and after this administration, filling of the drug solution into the storage chamber is automatically started.

また、本発明は、加圧された薬液を吐出可能な吐出部と、前記吐出部に接続された前記注入用具とを備えていることを特徴とする薬液注入システムを提供する。   Moreover, this invention provides the chemical | medical solution injection system characterized by including the discharge part which can discharge the pressurized chemical | medical solution, and the said injection tool connected to the said discharge part.

本発明によれば、薬液注入のために使用者に要求される力を軽減することができる。   ADVANTAGE OF THE INVENTION According to this invention, the force requested | required of a user for chemical | medical solution injection | pouring can be reduced.

本発明の好ましい実施形態に係る薬液注入システムの全体構成を示す概略図である。It is the schematic which shows the whole structure of the chemical | medical solution injection | pouring system which concerns on preferable embodiment of this invention. 図1の注入用具の分解斜視図である。It is a disassembled perspective view of the injection tool of FIG. 図1の注入用具の動作を示す断面図であり、吐出完了時(初回充填時)の状態を示したものである。It is sectional drawing which shows operation | movement of the injection tool of FIG. 1, and shows the state at the time of completion of discharge (at the time of first time filling). 図1の注入用具の動作を示す断面図であり、蛇腹容器に対する薬液充填期間中の状態を示したものである。It is sectional drawing which shows operation | movement of the injection device of FIG. 1, and shows the state in the chemical | medical solution filling period with respect to a bellows container. 図1の注入用具の動作を示す断面図であり、薬液充填完了時の状態を示したものである。It is sectional drawing which shows operation | movement of the injection tool of FIG. 1, and shows the state at the time of completion of chemical | medical solution filling. 図1の注入用具の動作を示す断面図であり、操作部材の操作時の状態を示したものである。It is sectional drawing which shows operation | movement of the injection tool of FIG. 1, and shows the state at the time of operation of an operation member. 図1の注入用具の動作を示す断面図であり、蛇腹容器内の薬液を患者側へ導出している状態を示したものである。It is sectional drawing which shows operation | movement of the injection device of FIG. 1, and has shown the state which has guide | induced the chemical | medical solution in a bellows container to the patient side. 図3〜図7の状態を示す一覧表である。It is a list which shows the state of FIGS. 本発明の別の実施形態に係る薬液注入システムの全体構成を示す概略図である。It is the schematic which shows the whole structure of the chemical injection system which concerns on another embodiment of this invention. 図9の注入用具の断面図を拡大して示すものであり、薬液が充填されていない状態を示している。FIG. 10 is an enlarged cross-sectional view of the injection device in FIG. 9, showing a state in which the chemical solution is not filled. 図9の注入用具の断面図を拡大して示すものであり、薬液を注入している状態を示している。FIG. 10 is an enlarged cross-sectional view of the injection tool in FIG. 9 and shows a state in which a chemical solution is being injected.

以下、本発明の好ましい実施形態について図面を参照して説明する。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

図1は、本発明の好ましい実施形態に係る薬液注入システムの全体構成を示す概略図である。図2は、図1の注入用具の分解斜視図である。以下、図1の上下方向を用いて説明する。   FIG. 1 is a schematic diagram showing an overall configuration of a chemical liquid injection system according to a preferred embodiment of the present invention. FIG. 2 is an exploded perspective view of the injection device of FIG. Hereinafter, description will be made using the vertical direction of FIG.

図1及び図2を参照して、薬液注入システム1は、加圧された薬液を吐出可能な薬液ポンプ(吐出部)2と、この薬液ポンプ2に接続され、薬液ポンプ2から吐出される薬液の流量を調整するための流量制御器3と、この流量制御器3からの薬液を充填するとともに使用者の操作に応じて所定量の薬液を導出するように構成された注入用具4と、この注入用具4から導出された薬液を患者に導くカテーテル5とを備えている。本実施形態では、薬液ポンプ2と流量制御器3との間が導入チューブL1によって接続され、流量制御器3と注入用具4との間が導入チューブL2によって接続され、注入用具4とカテーテル5との間が導出チューブL3によって接続されている。   Referring to FIGS. 1 and 2, a chemical liquid injection system 1 includes a chemical liquid pump (discharge unit) 2 that can discharge pressurized chemical liquid, and a chemical liquid that is connected to the chemical liquid pump 2 and discharged from the chemical liquid pump 2. A flow controller 3 for adjusting the flow rate of the liquid, an injection device 4 configured to fill a chemical solution from the flow rate controller 3 and derive a predetermined amount of the chemical solution in accordance with a user operation, and And a catheter 5 for guiding the drug solution derived from the injection tool 4 to the patient. In the present embodiment, the chemical pump 2 and the flow rate controller 3 are connected by an introduction tube L1, and the flow rate controller 3 and the injection tool 4 are connected by an introduction tube L2, and the injection tool 4 and the catheter 5 are connected to each other. Are connected by a lead-out tube L3.

薬液ポンプ2は、薬液を収容する収容部を有し、この収容部内の薬液を所定の圧力に加圧した状態で吐出するように構成されたものである。具体的に、薬液ポンプ2としては、例えば、国際公開第95/28977号に開示されるような大気圧を駆動源とするもの、特開2004−147862号公報に開示されるような伸縮性容器の復元力を駆動力とするもの、又はばね等の弾性部材の付勢力を駆動力とするものを採用することができる。   The chemical liquid pump 2 has an accommodating portion that accommodates the chemical solution, and is configured to discharge the chemical solution in the accommodating portion while being pressurized to a predetermined pressure. Specifically, as the chemical pump 2, for example, one using an atmospheric pressure as a driving source as disclosed in International Publication No. 95/28977, an elastic container as disclosed in Japanese Patent Application Laid-Open No. 2004-147862 It is possible to adopt a driving force that uses a restoring force of the above, or a driving force that uses an urging force of an elastic member such as a spring.

注入用具4は、薬液ポンプ2に接続される導入チューブ(導入通路)L2と、この導入チューブL2により導かれた薬液を収容可能な蛇腹容器6と、この蛇腹容器6から導出された薬液をカテーテル5側に導くための導出チューブ(導出通路)L3と、蛇腹容器6に取り付けられるとともに前記導入チューブL2及び導出チューブL3に接続された接続部材7と、この接続部材7に設けられた切換弁8と、蛇腹容器6の伸縮に応じて弾性変形するコイルばね(付勢手段)9と、前記蛇腹容器6、接続部材7、切換弁8及びコイルばね9を収納する筒状容器10及び蓋体11と、筒状容器10の一端に設けられた操作部材(操作部)12とを備えている。   The injection tool 4 includes an introduction tube (introduction passage) L2 connected to the chemical liquid pump 2, a bellows container 6 capable of storing the chemical liquid guided by the introduction tube L2, and a chemical liquid derived from the bellows container 6 as a catheter. A lead-out tube (lead-out passage) L3 for leading to the side 5, a connection member 7 attached to the bellows container 6 and connected to the introduction tube L2 and the lead-out tube L3, and a switching valve 8 provided in the connection member 7 A coil spring (biasing means) 9 that is elastically deformed according to the expansion and contraction of the bellows container 6, a cylindrical container 10 that houses the bellows container 6, the connecting member 7, the switching valve 8, and the coil spring 9, and a lid 11 And an operation member (operation unit) 12 provided at one end of the cylindrical container 10.

蛇腹容器6は、上下方向の伸縮軸に沿って伸縮可能に構成され、その伸縮方向の下側が閉じられているとともに、上側が開口している。具体的に、蛇腹容器6は、前記伸縮軸に沿って伸縮可能な円筒状の蛇腹本体6aと、この蛇腹本体6aの下側を閉じる底部6bと、この底部6bに設けられた突出部6cとを備えている。この突出部6cは、底部6bよりも小さな直径寸法を有して下に突出している。   The bellows container 6 is configured to be expandable and contractible along a vertical expansion / contraction axis. The lower side of the expansion / contraction direction is closed and the upper side is open. Specifically, the bellows container 6 includes a cylindrical bellows body 6a that can be expanded and contracted along the telescopic axis, a bottom portion 6b that closes the lower side of the bellows body 6a, and a protruding portion 6c that is provided on the bottom portion 6b. It has. The protrusion 6c has a smaller diameter than the bottom 6b and protrudes downward.

接続部材7は、蛇腹容器6の開口部を塞いで当該蛇腹容器6の内部に収容室S1を形成するとともに、この収容室S1と連通可能となるように導入チューブL2及び導出チューブL3に接続され、後述する切換弁8を保持する。具体的に、接続部材7は、略同等の直径寸法を有する一対の円板部7a及び円板部7cと、これら円板部7a、7cを同心に連結する連結部7bとを備えている。円板部7aの下面には、蛇腹容器6の蛇腹本体6aの開口側の端面が突き合わされた状態で接着されている。また、円板部7aは、蛇腹本体6aの内側となる位置で上下に貫通する貫通孔7dを有している。この貫通孔7dと連通するように、円板部7aには前記導入チューブL2が接続されている。連結部7bは、各円板部7a、7cの略中心位置で当該円板部7a、7c同士を連結する。この連結部7bには、各円板部7a、7cの中心に対応する位置に挿通孔7fが形成され、前記収容室S1は、この挿通孔7fを通して円板部7cの上側に開放されている。この挿通孔7fには後述する切換弁8が挿入されている。また、連結部7bには、当該連結部7bの軸線方向と直交する方向に連結部7bを貫く貫通孔7eが形成されている。この貫通孔7eと連通するように、連結部7bには前記導出チューブL3が接続されている。   The connecting member 7 closes the opening of the bellows container 6 to form a storage chamber S1 inside the bellows container 6, and is connected to the introduction tube L2 and the lead-out tube L3 so as to be able to communicate with the storage chamber S1. The switching valve 8 to be described later is held. Specifically, the connection member 7 includes a pair of disk portions 7a and 7c having substantially the same diameter size, and a connecting portion 7b that concentrically connects these disk portions 7a and 7c. The bottom surface of the disc portion 7a is bonded in a state in which the end surface on the opening side of the bellows body 6a of the bellows container 6 is abutted. Moreover, the disc part 7a has the through-hole 7d penetrated up and down in the position inside the bellows main body 6a. The introduction tube L2 is connected to the disc portion 7a so as to communicate with the through hole 7d. The connecting portion 7b connects the disc portions 7a and 7c to each other at a substantially central position of the disc portions 7a and 7c. The connecting portion 7b is formed with an insertion hole 7f at a position corresponding to the center of each of the disc portions 7a and 7c, and the storage chamber S1 is opened to the upper side of the disc portion 7c through the insertion hole 7f. . A switching valve 8 described later is inserted into the insertion hole 7f. Further, a through hole 7e is formed in the connecting portion 7b so as to penetrate the connecting portion 7b in a direction orthogonal to the axial direction of the connecting portion 7b. The lead-out tube L3 is connected to the connecting portion 7b so as to communicate with the through hole 7e.

切換弁8は、前記導出チューブL3を介した薬液の導出を許容する開放位置と、前記導出チューブL3を介した薬液の導出を阻止する閉鎖位置との間で切換可能となるように、前記連結部7bの挿通孔7f内に設けられている。具体的に、切換弁8は、前記挿通孔7f内に挿通可能な太さを有する棒状の棒状本体8aと、この棒状本体8aの外側に設けられた上下一対のオーリング8b、8cとを備えている。これらオーリング8b、8cは、棒状本体8aと挿通孔7fの内側面との間で挟持されることにより当該棒状本体8aと連結部7bとの間の薬液の流通を阻止する大きさとされているとともに、図1に示すように挿通孔7f内で貫通孔7eを挟むことができる間隔で互いに上下に離間して配置されている。そして、各オーリング8b、8c間で貫通孔7eを挟んだ図1に示す閉鎖位置から図6に示すように棒状本体8aが下側に移動してオーリング8cが連結部7bの下側に配置された開放位置へ切り換えることにより、収容室S1内の薬液を貫通孔7eを通して導出チューブL3側に導くことができる。一方、棒状本体8aは、閉鎖位置において蛇腹容器6内に所定量の薬液が充填されたときに図5に示すように操作部材12の下面に当接することができる長さを有している。換言すると、棒状本体8aは、閉鎖位置において蛇腹容器6内に充填された薬液が予め設定された量以下である場合には、この不足分だけ蛇腹容器6が縮んでいることにより操作部材12の下面から離間する長さを有している。また、棒状本体8aは、開放位置において前記所定量の薬液の導出が完了に至る蛇腹容器6の縮小動作に応じて、図3に示すように蓋体11に当接して閉鎖位置に戻ることができる長さを有している。本実施形態では、各オーリング8b、8c及びこれらを支持する棒状本体8aの一部が開閉部に該当し、棒状本体8aの上部が操作部材12と係合する被操作部に該当する。   The switching valve 8 is connected to the connection position so that the switching valve 8 can be switched between an open position that allows derivation of the chemical solution through the derivation tube L3 and a closed position that prevents derivation of the chemical solution through the derivation tube L3. It is provided in the insertion hole 7f of the portion 7b. Specifically, the switching valve 8 includes a rod-like rod-shaped main body 8a having a thickness that can be inserted into the insertion hole 7f, and a pair of upper and lower O-rings 8b and 8c provided outside the rod-shaped main body 8a. ing. The O-rings 8b and 8c are sized to prevent the flow of the chemical solution between the rod-shaped main body 8a and the connecting portion 7b by being sandwiched between the rod-shaped main body 8a and the inner surface of the insertion hole 7f. At the same time, as shown in FIG. 1, the through holes 7 e are spaced apart from each other at intervals that allow the through holes 7 e to be sandwiched in the insertion holes 7 f. Then, as shown in FIG. 6, the rod-shaped main body 8a moves downward from the closed position shown in FIG. 1 with the through hole 7e sandwiched between the O-rings 8b and 8c, and the O-ring 8c moves to the lower side of the connecting portion 7b. By switching to the arranged open position, the chemical solution in the storage chamber S1 can be guided to the outlet tube L3 side through the through hole 7e. On the other hand, the rod-shaped main body 8a has a length capable of coming into contact with the lower surface of the operation member 12 as shown in FIG. 5 when a predetermined amount of chemical solution is filled in the bellows container 6 in the closed position. In other words, the rod-shaped main body 8a is configured such that when the medicinal solution filled in the bellows container 6 is equal to or less than a preset amount at the closed position, the bellows container 6 is contracted by this shortage, so It has a length away from the lower surface. Further, as shown in FIG. 3, the rod-shaped main body 8a returns to the closed position as shown in FIG. 3 according to the contraction operation of the bellows container 6 until the derivation of the predetermined amount of the chemical solution is completed in the open position. It has a possible length. In the present embodiment, each of the O-rings 8 b and 8 c and a part of the rod-like main body 8 a that supports them correspond to the opening / closing portion, and the upper portion of the rod-like main body 8 a corresponds to the operated portion that engages with the operation member 12.

コイルばね9は、筒状容器10と蓋体11の間で蛇腹容器6の伸縮動作に応じて伸縮可能とされている。具体的に、筒状容器10は、筒状の本体部10aと、この本体部10aの上部において内側に突出する突出部10bとを備え、この突出部10bと本体部10aの下方開口端に固定された蓋体11との間で、前記蛇腹容器6、接続部材7、切換弁8及びコイルばね9を収納する。つまり、蓋体11は、伸縮可能となるように蛇腹本体6aの底部6bを支持するとともに、この蛇腹容器6上に固定された接続部材7の円板部7cと筒状容器10の突出部10bとの間でコイルばね9が支持されている。そして、コイルばね9のばね係数は、蛇腹容器6内に所定量(本実施形態では3ml)の薬液が充填されるまでの間に当該蛇腹容器6を伸張する力(薬液ポンプ2の吐出圧に起因する力)よりも小さな弾性力を生じさせるように設定されている。したがって、蛇腹本体6aの伸張動作に応じてコイルばね9が弾性力を蓄えながら縮む一方、後述する操作部材12が操作されることにより、蛇腹本体6aを縮小させるための力としてコイルばね9の弾性力を利用することができる。   The coil spring 9 can be expanded and contracted between the cylindrical container 10 and the lid body 11 according to the expansion and contraction operation of the bellows container 6. Specifically, the cylindrical container 10 includes a cylindrical main body portion 10a and a protruding portion 10b protruding inward at the upper portion of the main body portion 10a, and is fixed to the lower opening end of the protruding portion 10b and the main body portion 10a. The bellows container 6, the connecting member 7, the switching valve 8, and the coil spring 9 are accommodated between the lid body 11 thus made. That is, the lid 11 supports the bottom portion 6b of the bellows body 6a so that it can expand and contract, and the disc portion 7c of the connecting member 7 fixed on the bellows container 6 and the protruding portion 10b of the cylindrical container 10. A coil spring 9 is supported between the two. The spring coefficient of the coil spring 9 is determined by the force (the discharge pressure of the chemical pump 2) that expands the bellows container 6 before the bellows container 6 is filled with a predetermined amount (3 ml in this embodiment) of the chemical liquid. It is set so as to generate an elastic force smaller than the resulting force. Accordingly, the coil spring 9 contracts while accumulating elastic force according to the expansion operation of the bellows body 6a, while the operation member 12 described later is operated, whereby the elasticity of the coil spring 9 is used as a force for contracting the bellows body 6a. Power can be used.

操作部材12は、使用者から操作を受けることにより、前記切換弁8の棒状本体8aを押圧して当該切換弁8を閉鎖位置から開放位置に切り換えるためのものである。具体的に、操作部材12は、下向きに開く有底容器状の操作部本体12aと、この操作部本体12aの底部から下方に突出する筒部12bと、この筒部12bの下端部から外側に突出するフランジ部12cと、前記筒部12bと同軸となるように前記操作部本体12aの底部から下方に突出する操作棒12dとを備えている。前記操作部本体12aは、前記筒状容器10の本体部10aに対し上部開口から挿入され、前記突出部10bを下限として、本体部10aの内側面に沿って上下に摺動可能とされている。筒部12bは、前記突出部10bに形成された孔を通って当該突出部10bを上下に貫通している。フランジ部12cは、筒状容器10の突出部の下面と当接することにより操作部材12の上方への抜け止めとして機能する。また、フランジ部12cの下面には前記コイルばね9の上端部が当接し、このコイルばね9の付勢力によって、操作部材12が常に上方に付勢されている。操作棒12dは、前記切換弁8の棒状本体8aと同軸に配置され、当該棒状本体8aの上端面が操作棒12dの下端面に当接した状態で、操作部材12を押下操作することにより切換弁8が閉鎖位置から開放位置に押し下げられる。   The operation member 12 is for pressing the rod-shaped main body 8a of the switching valve 8 and switching the switching valve 8 from the closed position to the open position by receiving an operation from the user. Specifically, the operation member 12 includes a bottomed container-like operation part main body 12a that opens downward, a cylindrical part 12b that protrudes downward from the bottom of the operation part main body 12a, and an outer side from the lower end of the cylindrical part 12b. A protruding flange portion 12c and an operating rod 12d protruding downward from the bottom of the operating portion main body 12a so as to be coaxial with the cylindrical portion 12b are provided. The operation part main body 12a is inserted into the main body part 10a of the cylindrical container 10 from an upper opening, and can slide up and down along the inner surface of the main body part 10a with the protrusion 10b as a lower limit. . The cylinder part 12b penetrates the protrusion part 10b up and down through a hole formed in the protrusion part 10b. The flange portion 12 c functions as a stopper to prevent the operating member 12 from coming off by contacting the lower surface of the protruding portion of the cylindrical container 10. Further, the upper end portion of the coil spring 9 abuts on the lower surface of the flange portion 12c, and the operating member 12 is always urged upward by the urging force of the coil spring 9. The operation rod 12d is arranged coaxially with the rod-shaped main body 8a of the switching valve 8, and is switched by depressing the operation member 12 in a state where the upper end surface of the rod-shaped main body 8a is in contact with the lower end surface of the operation rod 12d. The valve 8 is pushed down from the closed position to the open position.

以下、前記薬液注入システム1の動作について、図3〜図8を参照して説明する。図3は、図1の注入用具4の動作を示す断面図であり、吐出完了時(初回充填時)の状態を示したものである。図4は、蛇腹容器6に対する薬液充填期間中の状態を示したものである。図5は薬液充填完了時の状態を示したものである。図6は、操作部材12の操作時の状態を示したものである。図7は、蛇腹容器6内の薬液を患者側へ導出している状態を示したものである。図8は、図3〜図7の状態を示す一覧表である。   Hereinafter, operation | movement of the said chemical | medical solution injection system 1 is demonstrated with reference to FIGS. FIG. 3 is a cross-sectional view showing the operation of the injection tool 4 of FIG. 1 and shows a state when the discharge is completed (at the time of initial filling). FIG. 4 shows a state in which the bellows container 6 is filled with the chemical solution. FIG. 5 shows a state at the completion of filling with the chemical solution. FIG. 6 shows a state when the operation member 12 is operated. FIG. 7 shows a state in which the drug solution in the bellows container 6 is led out to the patient side. FIG. 8 is a list showing the states of FIGS.

図3及び図8を参照して、蛇腹容器6内の薬液が全て充填された時、又は注入用具4の使用開始時においては、蛇腹容器6の蛇腹本体6aは、コイルばね9の付勢力によって最も縮められた状態とされている。なお、本実施形態では、蛇腹容器6が最も縮められた状態においてもコイルばね9の付勢力が生じるように、蛇腹容器6が最も縮められた状態でコイルばね9も縮んでいるようにコイルばね9の長さが設定されている。この図3の状態においては、切換弁8の棒状本体8aの下端部が蛇腹容器6の底部6b(突出部6c)に当接して上に押し上げられることにより、切換弁8が閉鎖位置とされている。したがって、この状態において、導入チューブL2からの薬液が貫通孔7dを通って導入されることにより、図3の状態から所定の時間(以下、ロックアウトタイムと称す)をかけて所定量(本実施形態では3ml)の薬液が蛇腹容器6内に充填される。   3 and 8, the bellows body 6 a of the bellows container 6 is urged by the biasing force of the coil spring 9 when all the chemicals in the bellows container 6 are filled or when the use of the injection device 4 is started. It is in the most contracted state. In the present embodiment, the coil spring is configured such that the coil spring 9 is also contracted when the bellows container 6 is most contracted so that the biasing force of the coil spring 9 is generated even when the bellows container 6 is contracted most. A length of 9 is set. In the state of FIG. 3, the lower end portion of the rod-shaped main body 8 a of the switching valve 8 is brought into contact with the bottom portion 6 b (protruding portion 6 c) of the bellows container 6 and pushed up, whereby the switching valve 8 is brought into the closed position. Yes. Therefore, in this state, the chemical solution from the introduction tube L2 is introduced through the through hole 7d, so that a predetermined amount of time (hereinafter referred to as a lockout time) from the state of FIG. In the form, 3 ml) of the chemical solution is filled in the bellows container 6.

図4及び図8を参照して、ロックアウトタイム中においては、薬液の充填に伴い蛇腹容器6が伸張することに応じて接続部材7が押し上げられる結果、この接続部材7と筒状容器10の突出部10bとの間に設けられたコイルばね9が押し縮められる。換言すると、コイルばね9の弾性力を蓄えつつ蛇腹容器6が伸張する。なお、蛇腹容器6の伸張時には、接続部材7と一体となって切換弁8も閉鎖位置を保持したまま上昇することになる。   4 and 8, during the lockout time, the connection member 7 is pushed up as the bellows container 6 expands with the filling of the chemical solution. As a result, the connection member 7 and the cylindrical container 10 are The coil spring 9 provided between the protruding portion 10b is compressed. In other words, the bellows container 6 extends while accumulating the elastic force of the coil spring 9. In addition, when the bellows container 6 is extended, the switching valve 8 is also lifted together with the connecting member 7 while maintaining the closed position.

図5及び図8を参照して、ロックアウトタイムが到来すると、つまり、所定量の薬液が充填されると、切換弁8の棒状本体8aの上端面が操作部材12の操作棒12dに当接する。図示を省略しているが、このロックアウトタイム到来時において、接続部材7の上昇が規制されるようになっている。具体的には、接続部材7の上面と当接する位置決め部を筒状容器10の内側面に設けることや、これ以上の伸張を妨げるように蛇腹容器6の肉厚や形状を設計することや、蛇腹容器6が伸張する力とコイルばね9による弾性力とが吊り合うようにコイルばね9のばね係数を設定することにより、接続部材7の上昇を規制することができる。   5 and 8, when the lockout time comes, that is, when a predetermined amount of chemical solution is filled, the upper end surface of the rod-shaped main body 8a of the switching valve 8 comes into contact with the operation rod 12d of the operation member 12. . Although not shown, when the lockout time arrives, the ascending of the connecting member 7 is restricted. Specifically, a positioning portion that contacts the upper surface of the connection member 7 is provided on the inner surface of the cylindrical container 10, or the thickness and shape of the bellows container 6 are designed so as to prevent further expansion, By setting the spring coefficient of the coil spring 9 so that the force by which the bellows container 6 extends and the elastic force by the coil spring 9 are suspended, the rise of the connecting member 7 can be regulated.

図6及び図8を参照して、ロックアウトタイムの到来後、操作部材12を押し下げ操作すると、棒状本体8aが押し下げられることによりオーリング8cが円板部7aよりも下に配置される。これにより、矢印Y1に示すように蛇腹容器6から導出チューブL3への薬液の流通が許容されることにより蛇腹容器6内(収容室S1)が減圧されるため、コイルばね9に蓄えられた弾性力により蛇腹容器6が縮小して当該蛇腹容器6内の薬液が挿通孔7f及び貫通孔7eを介して導出チューブL3に導出される。ここで、蛇腹容器6内の薬液が導出チューブL3側に優先的に流れるのは、流量制御器3の流通抵抗がカテーテル5の流通抵抗に比べて大きいためである。   With reference to FIGS. 6 and 8, when the operation member 12 is pushed down after the lockout time has come, the bar-shaped main body 8a is pushed down, so that the O-ring 8c is disposed below the disk portion 7a. As a result, the inside of the bellows container 6 (accommodating chamber S1) is depressurized by allowing the flow of the chemical liquid from the bellows container 6 to the outlet tube L3 as indicated by the arrow Y1, so that the elasticity stored in the coil spring 9 is reduced. The bellows container 6 is reduced by force, and the chemical solution in the bellows container 6 is led out to the lead-out tube L3 through the insertion hole 7f and the through hole 7e. Here, the reason why the chemical solution in the bellows container 6 flows preferentially toward the outlet tube L3 is that the flow resistance of the flow rate controller 3 is larger than the flow resistance of the catheter 5.

図7及び図8を参照して、薬液導出中においては、蛇腹容器6の縮小動作に追従して接続部材7も下降するため、切換弁8は、開放位置を維持したまま下降することになる。そして、上述した図3のように、蛇腹容器6内の薬液を全て導出すると、棒状本体8aが蛇腹容器6の底部6bに当接して押し上げられることにより、切換弁8は、閉鎖位置へ切り換えられる。   7 and 8, during the derivation of the chemical solution, the connecting member 7 also descends following the contraction operation of the bellows container 6, so that the switching valve 8 descends while maintaining the open position. . Then, as shown in FIG. 3 described above, when all the chemical solution in the bellows container 6 is led out, the switching valve 8 is switched to the closed position by pushing the bar-shaped main body 8a against the bottom 6b of the bellows container 6 and pushing it up. .

以上説明したように、前記実施形態によれば、コイルばね9に蓄えられた弾性力によって収容室S1を収縮させて当該収容室S1内に収容された薬液を導出させることができるので、薬液注入のために使用者に要求される力を軽減することができる。つまり、本発明によれば、使用者が操作部材12を操作して切換弁8を開放位置に切り換えれば、それ以上の力を与えることなくコイルばね9の弾性力を利用して収容室S1内の薬液を導出させることができるため、薬液の導出のために使用者に要求される力としては切換弁8を開放位置に切り換えるための力に抑えることができる。したがって、前記実施形態によれば、薬液注入のために使用者に要求される力を軽減することができる。   As described above, according to the above-described embodiment, since the storage chamber S1 can be contracted by the elastic force stored in the coil spring 9 and the chemical liquid stored in the storage chamber S1 can be led out. Therefore, the force required for the user can be reduced. That is, according to the present invention, when the user operates the operation member 12 to switch the switching valve 8 to the open position, the accommodation chamber S1 is utilized by utilizing the elastic force of the coil spring 9 without applying any more force. Therefore, the force required for the user to derive the chemical solution can be suppressed to the force for switching the switching valve 8 to the open position. Therefore, according to the said embodiment, the force requested | required of a user for chemical | medical solution injection | pouring can be reduced.

前記実施形態のように、上下方向に伸縮する蛇腹容器6と蛇腹容器6の伸張に応じて縮むコイルばね9とを備えた構成によれば、コイルばね9の弾性力により蛇腹容器6を縮ませることによって当該蛇腹容器6内の薬液を導出することができる。   According to the configuration including the bellows container 6 that expands and contracts in the vertical direction and the coil spring 9 that contracts according to the extension of the bellows container 6, the bellows container 6 is contracted by the elastic force of the coil spring 9. Thus, the chemical solution in the bellows container 6 can be derived.

なお、本実施形態では、蛇腹容器6の伸張に応じて縮む弾性部材として、コイルばね9を例示したが、これに限定されるものではなく、例えば、弾性変形可能なゴムや、空気ばねのような流体ばねを弾性部材として用いることもできる。   In the present embodiment, the coil spring 9 is illustrated as an elastic member that contracts in accordance with the expansion of the bellows container 6, but is not limited to this. For example, elastically deformable rubber, air springs, and the like are used. A simple fluid spring can also be used as the elastic member.

前記実施形態のように、収容室S1内に所定量の薬液が充填されるまでの間に蛇腹容器6が伸張する力よりも小さな弾性力を生じさせるばね係数をコイルばね9が有する構成によれば、収容室S1内に所定量の薬液が充填される長さまで蛇腹容器6を確実に伸長させることができるとともに、この伸張動作に応じて蓄えられたコイルばね9の弾性力によって蛇腹容器6内の薬液を導出することができる。   According to the configuration in which the coil spring 9 has a spring coefficient that generates an elastic force smaller than the force by which the bellows container 6 expands until the container chamber S1 is filled with a predetermined amount of the chemical solution as in the above embodiment. For example, the bellows container 6 can be reliably extended to a length in which the predetermined amount of the chemical solution is filled in the storage chamber S1, and the elastic force of the coil spring 9 stored in accordance with the extension operation allows The chemical solution can be derived.

前記実施形態のように、所定量の薬液が収容室S1内に収容された状態において操作部材12と切換弁8の棒状本体8aとが当接し、収容室S1内に収容された薬液が前記所定量よりも不足している場合にはこの不足量の分だけ蛇腹容器6が縮んでいることによって操作部材12と棒状本体8aとが非接触とされる構成によれば、所定量の薬液が充填されるまでの間に操作部材12が操作されても切換弁8が閉鎖位置に維持されるため、所定量に満たない薬液の導出を阻止することができる。したがって、前記実施形態によれば、目的とする効能を得るために予め定められた量(所定量)の薬液を確実に患者に投与することが可能となるため、有効な薬液投与を実現することができるとともに、所定量に満たない薬液を導入してしまうことにより再度所定量を満たすために余分な時間を要するといった不具合を抑制することもできる。   As in the above-described embodiment, the operation member 12 and the rod-shaped main body 8a of the switching valve 8 are in contact with each other in a state where a predetermined amount of the chemical is stored in the storage chamber S1, and the chemical stored in the storage chamber S1 is When the amount is less than the fixed amount, the operation member 12 and the rod-shaped main body 8a are not in contact with each other by the contraction of the bellows container 6 by the shortage amount. Even if the operating member 12 is operated until the switch is made, the switching valve 8 is maintained in the closed position, so that it is possible to prevent derivation of the chemical solution less than the predetermined amount. Therefore, according to the embodiment, since it is possible to reliably administer a predetermined amount (predetermined amount) of a medicinal solution to a patient in order to obtain a target effect, effective medicinal solution administration is realized. In addition, it is possible to suppress a problem that extra time is required to satisfy the predetermined amount again by introducing a chemical solution that is less than the predetermined amount.

なお、本実施形態では、蛇腹容器6内の薬液の充填量が、本来必要な量(例えば、3ml)の9割の量以下である場合、操作部材12を押し下げても切換弁8が開放位置とならないように、当該切換弁8の棒状本体8aの長さが設定されている。   In this embodiment, when the filling amount of the chemical solution in the bellows container 6 is 90% or less of the originally required amount (for example, 3 ml), the switching valve 8 is opened even if the operation member 12 is pushed down. Therefore, the length of the rod-shaped main body 8a of the switching valve 8 is set.

前記実施形態のように、導出チューブL3を介した薬液の導出終了に至る蛇腹容器6の縮小に応じて切換弁8が開放位置から閉鎖位置に切り換えられる構成によれば、薬液の導出終了とともに切換弁8を自動的に切り換えることができるので、使用者により切換弁8を閉鎖位置から開放位置にする操作が行なわれるだけで所定量の薬液を確実に患者へ投与することができるとともに、この投与の後に自動的に蛇腹容器6内への薬液の充填が開始されることになる。   According to the configuration in which the switching valve 8 is switched from the open position to the closed position in accordance with the contraction of the bellows container 6 that reaches the end of the derivation of the chemical solution through the derivation tube L3 as in the above-described embodiment, the switching is performed with the completion of the derivation of the chemical solution. Since the valve 8 can be automatically switched, a predetermined amount of drug solution can be surely administered to the patient only by the user's operation to move the switching valve 8 from the closed position to the open position. After that, the filling of the chemical solution into the bellows container 6 is automatically started.

なお、前記実施形態では、導入チューブL2を介して流量制御器3が取り付けられているが、注入用具4(例えば、接続部材7)に対して直接流量制御器3を設けることもできる。   In the above-described embodiment, the flow rate controller 3 is attached via the introduction tube L2, but the flow rate controller 3 can be directly provided to the injection tool 4 (for example, the connecting member 7).

以下、本発明の別の実施形態について図9〜図11を参照して説明する。   Hereinafter, another embodiment of the present invention will be described with reference to FIGS.

図9は、本発明の別の実施形態に係る薬液注入システム20の全体構成を示す概略図である。図10は、図9の注入用具の断面図を拡大して示すものであり、薬液が充填されていない状態を示している。図11は、図9の注入用具の断面図を拡大して示すものであり、薬液を注入している状態を示している。なお、各図の上下方向を用いて以下説明する。   FIG. 9 is a schematic diagram showing an overall configuration of a chemical liquid injection system 20 according to another embodiment of the present invention. FIG. 10 is an enlarged cross-sectional view of the injection device shown in FIG. 9 and shows a state where the chemical solution is not filled. FIG. 11 is an enlarged cross-sectional view of the injection tool of FIG. 9 and shows a state in which a chemical solution is being injected. In addition, it demonstrates below using the up-down direction of each figure.

図9〜図11を参照して、薬液注入システム20は、薬液ポンプ2と、この薬液ポンプ2と導入チューブL4を介して接続された注入用具21と、この注入用具21と導出チューブL5を介して接続されたカテーテル5とを備えている。   9 to 11, a chemical liquid injection system 20 includes a chemical liquid pump 2, an injection tool 21 connected to the chemical liquid pump 2 via an introduction tube L4, and an injection tool 21 and a discharge tube L5. And a catheter 5 connected to each other.

注入用具21は、導入チューブL4と、この導入チューブL4に接続された第一接続部材22と、この第一接続部材22に設けられた流量制御部材23と、この流量制御部材23からの薬液を収容する収容室S2を形成するための弾性筒(弾性容器の側壁)24と、収容室S2から導出された薬液を患者側へ導くための導出チューブL5と、弾性筒24の上端に設けられるとともに導出チューブL5に接続された第二接続部材25と、この第二接続部材25に設けられた切換弁26と、第二接続部材25を摺動可能に保持する保持部材27と、第一接続部材22及び保持部材27を固定しつつ第一接続部材22、流量制御部材23、弾性筒24、第二接続部材25、切換弁26及び保持部材27を収納する収納容器28と、この収納容器28の上端に設けられた操作部材(操作部)30と、この操作部材30を収納容器28に対して付勢するコイルばね29とを備えている。   The injection tool 21 includes an introduction tube L4, a first connection member 22 connected to the introduction tube L4, a flow rate control member 23 provided on the first connection member 22, and a chemical solution from the flow rate control member 23. Provided at the upper end of the elastic cylinder 24, an elastic cylinder (side wall of the elastic container) 24 for forming the storage chamber S2 to be accommodated, a lead-out tube L5 for guiding the drug solution led out from the storage chamber S2 to the patient side A second connection member 25 connected to the lead-out tube L5, a switching valve 26 provided on the second connection member 25, a holding member 27 that holds the second connection member 25 slidably, and a first connection member A storage container 28 for storing the first connection member 22, the flow rate control member 23, the elastic cylinder 24, the second connection member 25, the switching valve 26 and the holding member 27 while fixing the 22 and the holding member 27, and the storage container 28 An operating member (operating part) 30 provided at the upper end, and a coil spring 29 for biasing the operating member 30 relative to container 28.

第一接続部材22は、収容室S2の下端を規定するための部材であり、合成樹脂からなる。具体的に、第一接続部材22は、円柱面状の外側面を有する本体部22aと、この本体部22aから下方に突出する筒体22bと、この筒体22bと同心に前記本体部22aを上下に貫通する貫通孔22cとを備えている。筒体22bの下端部には、導入チューブL4が接続されている。また、筒体22b内には、後述する流量制御部材23が圧入されており、この流量制御部材23と筒体22bの内側面との間を通過した薬液が貫通孔22cを介して収容室S2内に導かれる。   The first connection member 22 is a member for defining the lower end of the storage chamber S2, and is made of synthetic resin. Specifically, the first connecting member 22 includes a main body portion 22a having a cylindrical outer surface, a cylindrical body 22b protruding downward from the main body portion 22a, and the main body portion 22a concentrically with the cylindrical body 22b. And a through hole 22c penetrating vertically. An introduction tube L4 is connected to the lower end of the cylindrical body 22b. Further, a flow rate control member 23 to be described later is press-fitted into the cylindrical body 22b, and the chemical liquid that has passed between the flow rate control member 23 and the inner side surface of the cylindrical body 22b passes through the through hole 22c to accommodate the storage chamber S2. Led in.

流量制御部材23は、略円柱状の合成樹脂部材である。この流量制御部材23は、前記筒体22bの内径寸法と同等又はこれよりも若干大きい外形寸法を有し、前記筒体22b内に圧入されている。そして、流量制御部材23の外周面には、螺旋状の凹溝が形成されており、この凹溝の内側面と筒体22bの内側面との間に区画される微小な流路を通じて薬液を通すことにより、圧力損失を生じさせて薬液の流量が絞られる。   The flow rate control member 23 is a substantially cylindrical synthetic resin member. The flow control member 23 has an outer dimension that is equal to or slightly larger than the inner diameter of the cylindrical body 22b, and is press-fitted into the cylindrical body 22b. And the spiral groove is formed in the outer peripheral surface of the flow control member 23, and a chemical | medical solution is passed through the microchannel divided between the inner surface of this groove and the inner surface of the cylinder 22b. By passing, the pressure loss is caused and the flow rate of the chemical solution is reduced.

弾性筒24は、弾性可能な合成樹脂からなる円筒状の部材である。この弾性筒24の下端部は、前記第一接続部材22の本体部22aの円柱状の外側面に被せられた状態で当該本体部22aに対して接着等の手段により固定されている。一方、弾性筒24の上端部は、後述する第二接続部材25の外側に被せられた状態で当該第二接続部材25に対して接着等の手段により固定されている。これにより、弾性筒24内には、第一接続部材22と第二接続部材25との間に薬液を収容可能な収容室S2が形成されている。したがって、図9に示すように弾性筒24を伸ばしつつ第一接続部材22と第二接続部材25とが離間することにより収容室S2が拡張する一方、図10に示すように第一接続部材22と第二接続部材25とが近接することにより収容室S2が縮小する。なお、前記第一接続部材22の貫通孔22cは、収容室S2内に開口している。   The elastic cylinder 24 is a cylindrical member made of an elastic synthetic resin. The lower end portion of the elastic cylinder 24 is fixed to the main body portion 22a by means such as adhesion in a state where the lower end portion is covered on the columnar outer surface of the main body portion 22a of the first connection member 22. On the other hand, the upper end portion of the elastic cylinder 24 is fixed to the second connection member 25 by means of adhesion or the like in a state of being covered on the outside of the second connection member 25 described later. Thereby, in the elastic cylinder 24, a storage chamber S <b> 2 that can store a chemical solution is formed between the first connection member 22 and the second connection member 25. Therefore, the first connecting member 22 and the second connecting member 25 are separated from each other while the elastic cylinder 24 is extended as shown in FIG. 9, and the accommodation chamber S2 expands. On the other hand, as shown in FIG. And the second connecting member 25 approach each other, the accommodation chamber S2 is reduced. Note that the through hole 22c of the first connection member 22 opens into the storage chamber S2.

第二接続部材25は、円柱面状の外側面を有する本体部25aと、この本体部25aから上方に突出する保持筒25bと、この保持筒25bから当該保持筒25bと直交する方向に延びる接続筒25cとを備えている。本体部25aの円柱状の外側面には、前記弾性筒24が被せられて固定されている。また、本体部25aには、保持筒25bと同軸に上下に貫通する孔が形成されており、この孔及び保持筒25bを介して収容室S2は第二接続部材25の上側に開放されている。接続筒25cは、保持筒25b内と連通する筒体であり、その先端部に導出チューブL5が接続されている。   The second connecting member 25 includes a main body 25a having a cylindrical outer surface, a holding cylinder 25b protruding upward from the main body 25a, and a connection extending from the holding cylinder 25b in a direction perpendicular to the holding cylinder 25b. And a cylinder 25c. The elastic cylinder 24 is placed on and fixed to the cylindrical outer surface of the main body 25a. In addition, the main body portion 25a is formed with a hole penetrating up and down coaxially with the holding cylinder 25b, and the storage chamber S2 is opened to the upper side of the second connection member 25 through the hole and the holding cylinder 25b. . The connection cylinder 25c is a cylinder that communicates with the inside of the holding cylinder 25b, and a lead-out tube L5 is connected to the tip of the connection cylinder 25c.

切換弁26は、導出チューブL5を介した薬液の導出を許容する開放位置と、導出チューブL5を介した薬液の導出を阻止する閉鎖位置との間で切換可能となるように、第二接続部材25の保持筒25b内に設けられている。具体的に、切換弁26は、前記保持筒25b内に挿通可能な太さを有する棒状の棒状本体26aと、この棒状本体26aの外側に設けられた上下一対のオーリング26b、26cとを備えている。これらオーリング26b、26cは、棒状本体26aと保持筒25bの内側面との間で挟持されることにより当該棒状本体26aと保持筒25bとの間の薬液の流通を阻止する大きさとされているとともに、図9に示すように保持筒25b内で接続筒25c内の孔を上下に挟むことができる間隔で互いに離間して配置されている。そして、各オーリング26b、26c管で接続筒25c内の孔を挟んだ図9に示す閉鎖位置から図11に示すように棒状本体26aが下側に移動してオーリング26cが第二接続部材25の外側(下側)に配置された開放位置へ切り換えることにより、収容室S2内の薬液を接続筒25cを通して導出チューブL5側に導くことができる。一方、棒状本体26aは、閉鎖位置において収容室S2内に所定量の薬液が充填されたときに図9に示すように操作部材30の下面に当接することができる長さを有している。換言すると、棒状本体26aは、閉鎖位置において収容室S2内に充填された薬液が予め設定された量以下である場合には、この不足分だけ第二接続部材25が第一接続部材22に近接していることにより操作部材30の下面から離間する長さを有している。また、棒状本体26aは、開放位置において所定量の薬液の導出が完了に至る収容室S2の縮小動作(両接続部材22、25の近接動作)に応じて、図10に示すように第一接続部材22に当接して閉鎖位置に戻ることができる長さを有している。   The switching valve 26 is a second connecting member so that it can be switched between an open position that allows derivation of the chemical solution via the derivation tube L5 and a closed position that prevents derivation of the chemical solution via the derivation tube L5. 25 holding cylinders 25b are provided. Specifically, the switching valve 26 includes a rod-like rod-shaped main body 26a having a thickness that can be inserted into the holding cylinder 25b, and a pair of upper and lower O-rings 26b, 26c provided outside the rod-shaped main body 26a. ing. The O-rings 26b and 26c are sized to prevent the flow of the chemical solution between the rod-shaped main body 26a and the holding cylinder 25b by being sandwiched between the rod-shaped main body 26a and the inner surface of the holding cylinder 25b. In addition, as shown in FIG. 9, the holes in the connection cylinder 25 c are spaced apart from each other in the holding cylinder 25 b so that the holes in the connection cylinder 25 c can be sandwiched vertically. Then, as shown in FIG. 11, the rod-shaped main body 26a moves downward from the closed position shown in FIG. 9 in which the holes in the connection cylinder 25c are sandwiched between the O-rings 26b and 26c, and the O-ring 26c becomes the second connection member. By switching to the open position arranged on the outer side (lower side) of 25, the chemical solution in the storage chamber S2 can be guided to the outlet tube L5 side through the connection tube 25c. On the other hand, the rod-shaped main body 26a has a length capable of coming into contact with the lower surface of the operation member 30 as shown in FIG. 9 when a predetermined amount of chemical solution is filled in the storage chamber S2 in the closed position. In other words, the rod-like main body 26a has the second connecting member 25 close to the first connecting member 22 by the shortage when the chemical liquid filled in the storage chamber S2 is equal to or less than a preset amount at the closed position. By doing so, it has a length away from the lower surface of the operation member 30. Further, the rod-shaped main body 26a is connected to the first connection as shown in FIG. 10 in accordance with the reduction operation of the storage chamber S2 (the proximity operation of the two connection members 22 and 25) until the derivation of the predetermined amount of the chemical solution is completed at the open position. It has a length that can contact the member 22 and return to the closed position.

保持部材27は、前記第二接続部材25が上下に移動可能となるように当該第二接続部材25を内側に保持する。具体的に、保持部材27は、上端が閉じられるとともに前記第二接続部材25の本体部25aを収容可能な円筒状の部材であり、その底部を上下に貫通して前記棒状本体26aの上端部を挿通させる挿通孔27bと、第二接続部材25の接続筒25c(導出チューブL5)の上下動を許容するために側壁に設けられたスリット27aとを備えている。   The holding member 27 holds the second connecting member 25 inside so that the second connecting member 25 can move up and down. Specifically, the holding member 27 is a cylindrical member whose upper end is closed and which can accommodate the main body portion 25a of the second connection member 25. The upper end portion of the rod-shaped main body 26a extends vertically through the bottom portion thereof. And a slit 27a provided on the side wall in order to allow the connecting cylinder 25c (lead tube L5) of the second connecting member 25 to move up and down.

収納容器28は、前記第一接続部材22と保持部材27とを一定の間隔で固定するとともに後述する操作部材30を操作可能に保持するためのものである。具体的に、収納容器28は、前記第一接続部材22、流量制御部材23、弾性筒24、第二接続部材25、切換弁26及び保持部材27の外側を覆う略円形の被覆部28aと、この被覆部28aから上下にそれぞれ突出する円筒部28b及び円筒部28cと、下側の円筒部28b内に設けられた保持部材31とを備えている。被覆部28aの内側面には、接着等の手段によって保持部材27が固定されている。保持部材31は下側の円筒部28bの内側面に固定されているとともに、保持部材31の上面には前記第一接続部材22の本体部22aの下面が固定されている。また、保持部材31は、前記第一接続部材22の筒体22bを通すための貫通孔31aと、導出チューブL5を通すための貫通孔31bとを有している。一方、上側の円筒部28cには、内側へ突出する突出部28dが設けられている。この突出部28dは、後述する操作部材30の上方への抜け止めとして機能する。   The storage container 28 is used to fix the first connecting member 22 and the holding member 27 at a constant interval and to hold an operation member 30 described later in an operable manner. Specifically, the storage container 28 includes a substantially circular covering portion 28a that covers the outside of the first connection member 22, the flow rate control member 23, the elastic cylinder 24, the second connection member 25, the switching valve 26, and the holding member 27, A cylindrical portion 28b and a cylindrical portion 28c projecting upward and downward from the covering portion 28a, and a holding member 31 provided in the lower cylindrical portion 28b are provided. The holding member 27 is fixed to the inner side surface of the covering portion 28a by means such as adhesion. The holding member 31 is fixed to the inner side surface of the lower cylindrical portion 28 b, and the lower surface of the main body portion 22 a of the first connection member 22 is fixed to the upper surface of the holding member 31. The holding member 31 has a through hole 31a for passing the cylindrical body 22b of the first connection member 22 and a through hole 31b for passing the lead-out tube L5. On the other hand, the upper cylindrical portion 28c is provided with a protruding portion 28d protruding inward. The protruding portion 28d functions as an upward stopper for the operation member 30 described later.

操作部材30は、使用者から操作を受けることにより、切換弁26の棒状本体26aを押圧して当該切換弁26を閉鎖位置から開放位置に切り換えるためのものである。具体的に、操作部材30は、操作面を有する操作部30aと、この操作部の周縁部に下向きに立設された側壁30bと、この側壁30bに形成された係合穴30cと、操作部30aから下方に突出する操作棒30dとを備えている。操作部30a及び側壁30bは、前記収納容器28の上側の円筒部28c内に摺動可能に挿入されている。係合穴30cは、収納容器28に対する操作部材30の上下動の範囲を規定する。具体的に、係合穴30c内には、前記収納容器28の突出部28dが挿入されており、この突出部28dと係合穴30cの上側の側面とが当接する下限位置と、突出部28dと係合穴30cの下側の側面とが当接する上限位置との間で、操作部材30が上下動可能とされている。操作棒30dは、切換弁26の棒状本体26aと同軸に配置され、当該棒状本体26aの上端面が操作棒30dの下端面に当接した状態で、操作部材30を押下操作することにより切換弁26が閉鎖位置から開放位置に押し下げられる。   The operating member 30 is for pressing the rod-shaped main body 26a of the switching valve 26 and switching the switching valve 26 from the closed position to the open position by receiving an operation from the user. Specifically, the operation member 30 includes an operation portion 30a having an operation surface, a side wall 30b erected downward at a peripheral edge portion of the operation portion, an engagement hole 30c formed in the side wall 30b, and an operation portion. And an operation rod 30d protruding downward from 30a. The operation part 30a and the side wall 30b are slidably inserted into the upper cylindrical part 28c of the storage container 28. The engagement hole 30 c defines a range of vertical movement of the operation member 30 with respect to the storage container 28. Specifically, the protrusion 28d of the storage container 28 is inserted into the engagement hole 30c, and a lower limit position where the protrusion 28d abuts on the upper side surface of the engagement hole 30c, and the protrusion 28d. And the upper limit position where the lower side surface of the engagement hole 30c comes into contact with each other, the operation member 30 can be moved up and down. The operating rod 30d is arranged coaxially with the rod-shaped main body 26a of the switching valve 26, and the switching valve is operated by depressing the operating member 30 in a state where the upper end surface of the rod-shaped main body 26a is in contact with the lower end surface of the operating rod 30d. 26 is pushed down from the closed position to the open position.

コイルばね29は、前記操作部30aの下面と保持部材27の上面との間に設けられ、操作部材30を常時上に付勢している。   The coil spring 29 is provided between the lower surface of the operation portion 30a and the upper surface of the holding member 27, and constantly biases the operation member 30 upward.

以下、前記薬液注入システム1の動作について説明する。   Hereinafter, the operation of the chemical injection system 1 will be described.

図10を参照して、収容室S2内の薬液が全て充填された時、又は注入用具21の使用開始時においては、第二接続部材25は、弾性筒24の弾性力(復元力)によって最も第一接続部材22に近接した状態(収容室S2が空の状態)とされている。この状態においては、切換弁26の棒状本体26aの下端部が第一接続部材22の上面に当接して、第二接続部材25に対して上に押し上げられていることにより、切換弁26が閉鎖位置とされている。したがって、この状態において、導入チューブL4から薬液が貫通孔22cを通って導入されることにより、図10の状態からロックアウトタイムをかけて所定量の薬液が収容室S2内に充填される。収容室S2内に薬液が導入されると、第一接続部材22と第二接続部材25とが互いに離間することにより、弾性筒24を伸張させて当該弾性筒24の復元力を蓄えつつ、収容室S2内に薬液が充填される。   Referring to FIG. 10, when all of the chemical solution in the storage chamber S <b> 2 is filled or when the use of the injection tool 21 is started, the second connecting member 25 is most affected by the elastic force (restoring force) of the elastic cylinder 24. The state is close to the first connection member 22 (the accommodation chamber S2 is empty). In this state, the switching valve 26 is closed by the lower end portion of the rod-shaped main body 26 a of the switching valve 26 being in contact with the upper surface of the first connecting member 22 and being pushed up with respect to the second connecting member 25. It is considered as a position. Therefore, in this state, the chemical solution is introduced from the introduction tube L4 through the through hole 22c, so that a predetermined amount of the chemical solution is filled into the storage chamber S2 from the state of FIG. 10 over the lockout time. When the chemical solution is introduced into the storage chamber S2, the first connecting member 22 and the second connecting member 25 are separated from each other, so that the elastic cylinder 24 is expanded and stored while restoring force of the elastic cylinder 24 is stored. The chamber S2 is filled with a chemical solution.

図9を参照して、ロックアウトタイムが到来すると、切換弁26の棒状本体26aの上端面が操作部材30の操作棒30dに当接する。この状態で、操作部材30を押し下げ操作すると、棒状本体26aが押し下げられることによりオーリング26cが第一接続部材22の外側(下側)に配置される。その結果、収容室S2から導出チューブL5への薬液の流通が許容されることにより収容室S2内が減圧されるため、弾性筒24に蓄えられた復元力により第二接続部材25が下に引っ張られて収容室S2が縮小し、当該収容室S2内の薬液が導出チューブL5を介して導出される。   Referring to FIG. 9, when the lockout time comes, the upper end surface of rod-shaped main body 26 a of switching valve 26 comes into contact with operation rod 30 d of operation member 30. In this state, when the operation member 30 is pushed down, the rod-shaped main body 26a is pushed down, so that the O-ring 26c is disposed on the outer side (lower side) of the first connection member 22. As a result, since the inside of the storage chamber S2 is depressurized by allowing the flow of the chemical solution from the storage chamber S2 to the outlet tube L5, the second connecting member 25 is pulled downward by the restoring force stored in the elastic cylinder 24. Accordingly, the storage chamber S2 is reduced, and the chemical solution in the storage chamber S2 is led out via the lead-out tube L5.

図11を参照して、薬液導出中においては、第二接続部材25の移動に追従して切換弁26も下降するため、切換弁26は、開放位置を維持したまま下降することになる。そして、図10のように、収容室S2内の薬液を全て導出すると、棒状本体26aが第一接続部材22の上面に当接して押し上げられることにより、切換弁26は、閉鎖位置へ切り換えられる。   Referring to FIG. 11, during the derivation of the chemical solution, the switching valve 26 also descends following the movement of the second connecting member 25, so that the switching valve 26 descends while maintaining the open position. Then, as shown in FIG. 10, when all the chemical liquid in the storage chamber S <b> 2 is led out, the switching valve 26 is switched to the closed position by pushing the bar-shaped main body 26 a against the upper surface of the first connection member 22.

以上説明したように、前記実施形態によれば、弾性筒24の側壁そのものを付勢手段として利用することができるので、薬液を収容するための容器とこの容器の拡張に応じて縮む弾性部材とを個別に設ける場合と比較して構成を簡素化することができる。   As described above, according to the embodiment, since the side wall of the elastic cylinder 24 itself can be used as the urging means, the container for storing the chemical solution and the elastic member that contracts according to the expansion of the container, The configuration can be simplified as compared with the case where each is provided individually.

L1、L2、L4 導入チューブ(導入通路)
L3、L5 導出チューブ(導出通路)
S1、S2 収容室
1、20 薬液注入システム
2 薬液ポンプ(吐出部)
3 流量制御器(調整部)
4、21 注入用具
6 蛇腹容器(伸縮容器)
8、26 切換弁
8a、26a 棒状本体(開閉部、被操作部)
8b、8c、26b、26c オーリング(開閉部)
9 コイルばね(弾性部材)
12、30 操作部材(操作部)
22 第一接続部材(弾性容器の一部)
23 流量制御部材(調整部)
24 弾性筒(弾性容器の側壁)
25 第二接続部材(弾性容器の一部)
L1, L2, L4 Introduction tube (introduction passage)
L3, L5 Lead tube (lead passage)
S1, S2 storage chamber 1, 20 chemical solution injection system 2 chemical solution pump (discharge unit)
3 Flow controller (adjustment unit)
4, 21 Injection tool 6 Bellows container (expandable container)
8, 26 Switching valve 8a, 26a Bar-shaped body (opening / closing part, operated part)
8b, 8c, 26b, 26c O-ring (opening / closing part)
9 Coil spring (elastic member)
12, 30 Operation member (operation unit)
22 First connection member (part of elastic container)
23 Flow control member (adjustment part)
24 Elastic cylinder (side wall of elastic container)
25 Second connecting member (part of elastic container)

Claims (6)

加圧された薬液を吐出可能な吐出部に接続されるものであり、前記吐出部からの薬液を充填するとともに、使用者の操作に応じて所定量の薬液を導出するように構成された注入用具であって、
薬液の流量を調整するための調整部を介して前記吐出部から吐出された薬液を収容可能に構成され、前記薬液の収容に応じて拡張する一方、縮小させることに応じて収容された薬液を導出可能な収容室と、
前記収容室の拡張に伴い付勢力を蓄えつつ弾性変形可能な付勢手段と、
前記収容室から導出された薬液を患者側へ導くための導出通路と、
前記導出通路による薬液の導出を阻止するための閉鎖位置と、前記導出通路による薬液の導出を許容する開放位置との間で切換可能な切換弁と、
前記収容室内に前記所定量の薬液が収容された状態で、使用者の操作を受けることにより前記切換弁を前記閉鎖位置から開放位置へ切換可能な操作部とを備え、
前記操作部を用いて前記切換弁を開放位置に切り換えることにより、前記付勢手段に蓄えられた付勢力によって前記収容室を縮小させて前記収容室内に収容された薬液を導出させ、
前記注入用具は、前記収容室を内部に有するとともに所定の伸縮軸に沿って伸縮可能な伸縮容器をさらに備え、
前記付勢手段は、前記伸縮軸に沿った伸縮容器の伸張に応じて前記伸縮軸に沿って縮むことにより、前記収容室内に前記所定量の薬液が充填されるまでの間に前記伸縮容器が伸張する力よりも小さな付勢力であり、かつ、前記切換弁が閉鎖位置から開放位置に切り換えられたときに前記収容室内の薬液の全てを導出可能な付勢力を生じさせる弾性係数を有する弾性部材を有していることを特徴とする注入用具。
Injection that is connected to a discharge unit capable of discharging a pressurized chemical solution, and is configured to fill the chemical solution from the discharge unit and to derive a predetermined amount of the chemical solution according to a user's operation Tools,
The chemical liquid discharged from the discharge unit is configured to be accommodated via an adjustment unit for adjusting the flow rate of the chemical liquid, and expands in response to the storage of the chemical liquid, while the chemical liquid stored in response to the reduction is stored. A derivable containment chamber;
An urging means that is elastically deformable while accumulating an urging force with the expansion of the storage chamber;
A lead-out passage for guiding the liquid medicine led out from the storage chamber to the patient side;
A switching valve that is switchable between a closed position for preventing derivation of the chemical solution by the derivation passage and an open position that permits derivation of the chemical solution by the derivation passage;
An operation unit capable of switching the switching valve from the closed position to the open position by receiving a user's operation in a state where the predetermined amount of the chemical solution is stored in the storage chamber;
By switching the switching valve to the open position using the operation unit, the storage chamber is reduced by the biasing force stored in the biasing means, and the chemical liquid stored in the storage chamber is led out,
The injection tool further includes an expansion / contraction container that has the storage chamber inside and can expand and contract along a predetermined expansion / contraction axis,
Said biasing means, by condensation Mukoto along the telescopic shaft with an extension of the telescopic container along the telescopic shaft, the extendable container until the predetermined amount of liquid medicine is filled in the housing chamber There is a small biasing force than the force to stretch, and has a modulus of elasticity that causes a biasing force can be derived all drug solution of said housing chamber when said switching valve is switched from the closed position to the open position An injection device comprising an elastic member.
加圧された薬液を吐出可能な吐出部に接続されるものであり、前記吐出部からの薬液を充填するとともに、使用者の操作に応じて所定量の薬液を導出するように構成された注入用具であって、Injection that is connected to a discharge unit capable of discharging a pressurized chemical solution, and is configured to fill the chemical solution from the discharge unit and to derive a predetermined amount of the chemical solution according to a user's operation Tools,
薬液の流量を調整するための調整部を介して前記吐出部から吐出された薬液を収容可能に構成され、前記薬液の収容に応じて拡張する一方、縮小させることに応じて収容された薬液を導出可能な収容室と、The chemical liquid discharged from the discharge unit is configured to be accommodated via an adjustment unit for adjusting the flow rate of the chemical liquid, and expands in response to the storage of the chemical liquid, while the chemical liquid stored in response to the reduction is stored. A derivable containment chamber;
前記収容室の拡張に伴い付勢力を蓄えつつ弾性変形可能な付勢手段と、An urging means that is elastically deformable while accumulating an urging force with the expansion of the storage chamber;
前記収容室から導出された薬液を患者側へ導くための導出通路と、A lead-out passage for guiding the liquid medicine led out from the storage chamber to the patient side;
前記導出通路による薬液の導出を阻止するための閉鎖位置と、前記導出通路による薬液の導出を許容する開放位置との間で切換可能な切換弁と、A switching valve that is switchable between a closed position for preventing derivation of the chemical solution by the derivation passage and an open position that permits derivation of the chemical solution by the derivation passage;
前記収容室内に前記所定量の薬液が収容された状態で、使用者の操作を受けることにより前記切換弁を前記閉鎖位置から開放位置へ切換可能な操作部とを備え、An operation unit capable of switching the switching valve from the closed position to the open position by receiving a user's operation in a state where the predetermined amount of the chemical solution is stored in the storage chamber;
前記操作部を用いて前記切換弁を開放位置に切り換えることにより、前記付勢手段に蓄えられた付勢力によって前記収容室を縮小させて前記収容室内に収容された薬液を導出させ、By switching the switching valve to the open position using the operation unit, the storage chamber is reduced by the biasing force stored in the biasing means, and the chemical liquid stored in the storage chamber is led out,
前記注入用具は、前記収容室を内部に有するとともに所定の伸縮軸に沿って伸縮可能な伸縮容器をさらに備え、The injection tool further includes an expansion / contraction container that has the storage chamber inside and can expand and contract along a predetermined expansion / contraction axis,
前記付勢手段は、前記伸縮軸に沿った伸縮容器の伸張に応じて前記伸縮軸に沿って縮み、かつ、前記収容室内に前記所定量の薬液が充填されるまでの間に前記伸縮容器が伸張する力よりも小さな付勢力を生じさせる弾性係数を有する弾性部材を有し、The biasing means is contracted along the telescopic axis in accordance with the expansion of the telescopic container along the telescopic axis, and the elastic container is moved until the predetermined amount of the chemical solution is filled in the storage chamber. An elastic member having an elastic coefficient that generates an urging force smaller than a stretching force;
前記切換弁は、前記導出通路を開閉可能な開閉部と、前記操作部と係合することにより、前記開閉部を閉鎖位置から開放位置に変位させるための前記操作部による操作が可能となる被操作部とを備え、The switching valve engages with the opening / closing portion capable of opening and closing the lead-out passage and the operation portion, so that the operation portion can be operated by the operation portion for displacing the opening / closing portion from the closed position to the open position. With an operation unit,
前記所定量の薬液が前記収容室内に収容された状態において前記操作部と前記被操作部とが係合し、かつ、前記収容室内に収容された薬液が前記所定量よりも予め設定された量以上少ない場合にはこの不足量の分だけ前記収容室が縮んでいることによって前記操作部と前記被操作部との係合が規制されることを特徴とする注入用具。In a state where the predetermined amount of the chemical solution is stored in the storage chamber, the operation portion and the operated portion are engaged, and the amount of the chemical solution stored in the storage chamber is set in advance from the predetermined amount. When the amount is smaller than the above, the injection chamber is characterized in that the engagement between the operation portion and the operated portion is restricted by the shrinkage of the storage chamber by the shortage amount.
前記弾性部材は、コイルばねからなることを特徴とする請求項1又は2に記載の注入用具。The injection tool according to claim 1, wherein the elastic member is a coil spring. 前記吐出部から吐出された薬液を前記収容室に導くための導入通路をさらに備え、An introduction passage for guiding the chemical liquid discharged from the discharge portion to the storage chamber;
前記導入通路の少なくとも一部を構成するものとして、前記調整部を備えていることを特徴とする請求項1〜3の何れか1項に記載の注入用具。The injection device according to any one of claims 1 to 3, wherein the adjustment portion is provided as at least a part of the introduction passage.
前記切換弁は、前記導出通路を介した薬液の導出終了に至る前記収容室の縮小に応じて前記開放位置から前記閉鎖位置へ切り換えられることを特徴とする請求項1〜4の何れか1項に記載の注入用具。   5. The switching valve according to claim 1, wherein the switching valve is switched from the open position to the closed position in accordance with the reduction of the storage chamber that reaches the end of the derivation of the chemical solution through the derivation passage. The infusion device described in 1. 加圧された薬液を吐出可能な吐出部と、
前記吐出部に接続された請求項1〜5の何れか1項に記載の注入用具とを備えていることを特徴とする薬液注入システム。
A discharge part capable of discharging pressurized chemical liquid;
A chemical solution injection system comprising: the injection device according to any one of claims 1 to 5 connected to the discharge unit.
JP2010024685A 2010-02-05 2010-02-05 Injection tool and chemical injection system equipped with the same Expired - Fee Related JP5631603B2 (en)

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