JP5963265B2 - Micro pump - Google Patents
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- JP5963265B2 JP5963265B2 JP2013057121A JP2013057121A JP5963265B2 JP 5963265 B2 JP5963265 B2 JP 5963265B2 JP 2013057121 A JP2013057121 A JP 2013057121A JP 2013057121 A JP2013057121 A JP 2013057121A JP 5963265 B2 JP5963265 B2 JP 5963265B2
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Description
本発明は、微量の流体を吐出するマイクロポンプに関する。 The present invention relates to a micropump that discharges a minute amount of fluid.
従来から、例えば動物を用いた薬効テスト又は糖尿病患者へのインスリン注入のために、動物又は人体の皮下に埋め込み可能な微量の流体（毎分１マイクロリットル以下）注入ポンプとして、主にマイクロポンプが用いられてきた（例えば、特許文献１参照）。この種のマイクロポンプは、同一軸に軸支された第１カム及び第２カムと、流体を貯蔵したリザーバに接続され、かつ第１及び第２カム回りにリング状に配置されたチューブと、このチューブと第１及び第２カムとの間に配置された複数のフィンガーと、減速機構を介して第１及び第２カムに連結されたモータと、を備えている。モータが駆動されることにより、第１及び第２カムが回転して複数のフィンガーを順次押圧し、さらに、これらフィンガーがチューブを順次圧閉することにより、チューブ内の流体が上流側から下流側へ移動してチューブの吐出口から吐出される。 Conventionally, micropumps are mainly used as infusion pumps of minute amounts of fluid (less than 1 microliter per minute) that can be implanted under the skin of animals or human bodies, for example, for medicinal efficacy tests using animals or insulin injection into diabetic patients. Have been used (see, for example, Patent Document 1). This type of micropump includes a first cam and a second cam pivotally supported on the same shaft, a tube connected to a reservoir storing fluid, and arranged in a ring around the first and second cams, A plurality of fingers disposed between the tube and the first and second cams, and a motor connected to the first and second cams via a speed reduction mechanism are provided. When the motor is driven, the first and second cams rotate to sequentially press a plurality of fingers, and these fingers sequentially press-close the tube, so that the fluid in the tube flows from the upstream side to the downstream side. And discharged from the discharge port of the tube.
しかしながら、上記特許文献１に示されるようなマイクロポンプは、チューブ、第１及び第２カム、モータ及び減速機構等が組み合わされた複雑な構成を採用しており、マイクロポンプが大型化してしまう。このようなマイクロポンプが例えば薬効テストにおいて、実験用マウスの皮下に埋め込まれた場合、マウスが正常に動けなくなり、薬効テストを適切に行うことができなくなる虞がある。また、微量の薬液を間欠的にマウスに注入するためには、チューブを瞬間的に圧閉すればよく、モータ駆動によってチューブを連続的に圧閉する必要はない。むしろ、薬効テストを精度良く行うために、吐出される薬液の微量精度を確保することが重要である。 However, the micropump as disclosed in Patent Document 1 employs a complicated configuration in which a tube, first and second cams, a motor, a speed reduction mechanism, and the like are combined, and the micropump becomes large. When such a micropump is implanted under the skin of an experimental mouse in a medicinal effect test, for example, the mouse may not move normally and the medicinal effect test may not be performed properly. In addition, in order to inject a minute amount of a chemical solution into a mouse intermittently, the tube may be instantaneously closed, and it is not necessary to continuously close the tube by driving a motor. Rather, it is important to ensure a minute accuracy of the discharged chemical solution in order to accurately perform the medicinal effect test.
本発明は、上記課題を解決するためになされたものであり、小型化し易く、かつ微量の流体を精度良く吐出可能なマイクロポンプを提供することを目的とする。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a micropump that can be easily miniaturized and can accurately discharge a small amount of fluid.
上記課題を達成するために、本発明のマイクロポンプは、ポンプケースと、前記ポンプケース内に設けられ、液体を含浸させてなる可撓性の袋状部材と、前記ポンプケース内に設けられ、変位することにより前記袋状部材上から該部材を圧迫する磁性体を有した圧迫部材と、前記圧迫部材の磁性体を磁気吸引して該圧迫部材を変位させる電磁コイルと、を備えたマイクロポンプであって、前記袋状部材は、該袋状部材内に封入されて圧縮及び復元自在なスポンジ状部材と、該袋状部材の後記小容量貯蔵部内の液体を前記ポンプケース外へ吐出するための吐出チューブと、を有し、前記袋状部材及びスポンジ状部材は、これら内部に含ませた液体が大容量と小容量とに分けて貯蔵されるように、くびれ部でもって連通された大容量貯蔵部及び小容量貯蔵部を有し、前記くびれ部は、前記圧迫部材の変位初期において該圧迫部材により圧迫されて該袋状部材の大容量貯蔵部と小容量貯蔵部との間で液体が移動することを抑制し、前記圧迫部材の磁性体が前記電磁コイルに磁気吸引されて変位することにより、前記袋状部材が圧迫されて、前記袋状部材及びスポンジ状部材の小容量貯蔵部に含まれる液体が一定量に規制されて前記吐出チューブから吐出されることを特徴とする。 In order to achieve the above object, a micropump of the present invention is provided in a pump case, a flexible bag-like member provided in the pump case and impregnated with liquid, and provided in the pump case. A micropump comprising: a compression member having a magnetic body that compresses the member from above the bag-like member by displacement; and an electromagnetic coil that magnetically attracts the magnetic body of the compression member to displace the compression member. The bag-like member is a sponge-like member that is enclosed in the bag-like member and can be compressed and restored, and discharges the liquid in the small-capacity storage section described later of the bag-like member to the outside of the pump case. The bag-like member and the sponge-like member are connected to each other with a constricted portion so that the liquid contained in the bag-like member and the sponge-like member is stored in a large volume and a small volume. Capacity storage and small Has a volume reservoir, the neck portion may be liquid moving between the large reservoir and the small-capacity reservoir of has been bag-like member pressed by said pressing member in the displacement early the compression member And the magnetic material of the compression member is magnetically attracted and displaced by the electromagnetic coil, so that the bag-like member is compressed and the liquid contained in the small-capacity storage part of the bag-like member and the sponge-like member Is regulated to a certain amount and discharged from the discharge tube.
上記マイクロポンプにおいて、前記圧迫部材は、前記ポンプケースにヒンジにより回動自在に支持され、また、その一端に該圧迫部材が回動する際の支点としての回動支点部と、他端に前記電磁コイルによって磁性体が磁気吸引されることにより前記圧迫部材を前記回動支点部回りに回動させる作用部と、前記回動支点部と作用部との間に前記袋状部材のくびれ部を圧迫して液体の吐出量を規制する規制部と、を有し、前記圧迫部材が回動することにより、前記規制部が前記くびれ部を圧閉し、さらに、前記くびれ部を圧閉したまま前記圧迫部材が前記規制部を支点として前記小容量貯蔵部を圧迫することが好ましい。 In the micropump, the compression member is rotatably supported by a hinge on the pump case, and has a rotation fulcrum part as a fulcrum when the compression member rotates at one end and the rotation member at the other end. An action part for turning the compression member around the turning fulcrum part by magnetically attracting the magnetic body by the electromagnetic coil, and a constriction part of the bag-like member between the turning fulcrum part and the action part. A restricting portion that restricts the discharge amount of the liquid by pressing, and the restricting portion rotates to close the constricted portion, and the constricted portion remains closed. It is preferable that the compression member presses the small-capacity storage unit with the restricting unit as a fulcrum.
上記マイクロポンプにおいて、前記圧迫部材の磁性体は、前記電磁コイルにより磁気吸引されることにより変位して前記小容量貯蔵部を圧迫する磁石から成り、前記磁石と電磁コイルは、前記小容量貯蔵部を挟んで対向配置され、前記磁石は、ガイドピンにより変位自在に設けられ、かつ前記電磁コイルにより磁気吸引されないとき前記小容量貯蔵部を圧迫しない位置に戻るように、該電磁コイルがある側とは反対側に、該磁石が吸着される第２の磁性体を配置したことが好ましい。 In the micropump, the magnetic body of the compression member includes a magnet that is displaced by being magnetically attracted by the electromagnetic coil and compresses the small-capacity storage unit, and the magnet and the electromagnetic coil include the small-capacity storage unit. The magnet is disposed so as to be displaceable by a guide pin, and when the magnet coil is not magnetically attracted by the magnet coil, the magnet coil returns to a position where the magnet coil is not compressed. It is preferable that a second magnetic body to which the magnet is attracted is disposed on the opposite side.
上記マイクロポンプにおいて、前記吐出チューブに逆流防止用のバルブが取り付けられることが好ましい。 In the micropump, it is preferable that a valve for preventing backflow is attached to the discharge tube.
本発明のマイクロポンプによれば、電磁コイルの磁気吸引力によって変位した圧迫部材が、袋状部材の小容量貯蔵部を圧迫することにより、スポンジ状部材の小容量貯蔵部内の液体が吐出チューブから吐出されるので、簡単な構成で小型化し易いマイクロポンプを作製することができる。また、袋状部材にはくびれ部があるので、液体が大容量貯蔵部から小容量貯蔵部へ移動することが抑制されて、小容量貯蔵部から一定の少量の液体を精度良く吐出することができる。 According to the micropump of the present invention, the compression member displaced by the magnetic attractive force of the electromagnetic coil compresses the small volume storage portion of the bag-like member, so that the liquid in the small volume storage portion of the sponge-like member is discharged from the discharge tube. Since the liquid is discharged, a micropump that can be easily miniaturized with a simple configuration can be manufactured. In addition, since the bag-like member has a constricted portion, it is possible to prevent liquid from moving from the large-capacity storage unit to the small-capacity storage unit, and to discharge a certain small amount of liquid from the small-capacity storage unit with high accuracy. it can.
本発明の第１の実施形態に係るマイクロポンプについて、図１乃至図３を参照して説明する。以下においては、薬効テストにおいて実験用マウス等の動物の皮下に埋め込まれるマイクロポンプを例として挙げる。図１及び図２に示すように、マイクロポンプ１は、ポンプケース２と、薬液（液体）を含浸させて成る可撓性を有する袋状部材３と、この袋状部材３を圧迫する磁性体を有した圧迫部材４と、この圧迫部材４に対向して設けられる電磁コイル５と、を備えている。ポンプケース２は、その内部に上記袋状部材３等の各部材を密閉して格納している。袋状部材３は、この部材内に封入されて圧縮及び復元自在なスポンジ状部材６と、薬液をポンプケース２外へ吐出するための吐出チューブ７を有している。袋状部材３及びスポンジ状部材６は、メインタンク（大容量貯蔵部）３１と、分注タンク（小容量貯蔵部）３２と、これらタンク３１，３２の間に位置する分離帯（くびれ部）３３と、を有している。メインタンク３１は、大容量の薬液を貯蔵し、分注タンク３２は、吐出チューブ７に接続され、吐出されるべき小容量の薬液を貯蔵している。分離帯３３は、これらタンク３１，３２を連続一体となるように連通し、かつこれらタンク３１，３２内の薬液を互いに分離している。圧迫部材４は、その一端がポンプケース２にヒンジピン８により回動自在に支持され、他端が電磁コイル５と対向している。電磁コイル５が圧迫部材４の磁性体を磁気吸引することにより、圧迫部材４が回動して分注タンク３２が圧迫されて、薬液が吐出チューブ７から吐出される。 A micropump according to a first embodiment of the present invention will be described with reference to FIGS. In the following, a micropump implanted under the skin of an animal such as a laboratory mouse in a medicinal effect test will be taken as an example. As shown in FIGS. 1 and 2, the micropump 1 includes a pump case 2, a flexible bag-shaped member 3 impregnated with a chemical solution (liquid), and a magnetic body that presses the bag-shaped member 3. And a magnetic coil 5 provided to face the compression member 4. The pump case 2 stores each member such as the bag-like member 3 in a sealed state. The bag-like member 3 includes a sponge-like member 6 that is enclosed in the member and can be compressed and restored, and a discharge tube 7 for discharging the chemical solution to the outside of the pump case 2. The bag-like member 3 and the sponge-like member 6 are composed of a main tank (large-capacity storage section) 31, a dispensing tank (small-capacity storage section) 32, and a separation band (constriction section) located between these tanks 31 and 32. 33. The main tank 31 stores a large volume of chemical solution, and the dispensing tank 32 is connected to the discharge tube 7 and stores a small volume of chemical solution to be discharged. The separation band 33 communicates the tanks 31 and 32 so as to be continuous and separates the chemicals in the tanks 31 and 32 from each other. One end of the compression member 4 is rotatably supported by the pump case 2 by a hinge pin 8, and the other end faces the electromagnetic coil 5. When the electromagnetic coil 5 magnetically attracts the magnetic body of the compression member 4, the compression member 4 rotates and the dispensing tank 32 is compressed, and the chemical solution is discharged from the discharge tube 7.
ポンプケース２は、マウスの血液等がマイクロポンプ１内に侵入しないようにするためのものであり、開口を有した箱型のケース部２１と、このケース部２１の開口を塞ぐための蓋部２２と、を有している。ケース部２１は、その底面部において両側面からそれぞれ半円筒状に彫り込まれて形成された凹部２３を有し、これら凹部２３間にヒンジピン８を挿通するための挿通孔２４を有している。また、ケース部２１の底面部には、吐出チューブ７をマイクロポンプ１外へ延出するための吐出孔２５が設けられている。なお、薬効テストにおいて、マウスの皮下組織に損傷を与えないようにするために、ケース部２１及び蓋部２２は面取り加工されることが好ましい。 The pump case 2 is for preventing the blood of the mouse from entering the micropump 1, and a box-shaped case portion 21 having an opening and a lid portion for closing the opening of the case portion 21. 22. The case portion 21 has a recess 23 formed by being engraved in a semi-cylindrical shape from both side surfaces on the bottom surface portion, and has an insertion hole 24 for inserting the hinge pin 8 between the recesses 23. A discharge hole 25 for extending the discharge tube 7 to the outside of the micropump 1 is provided on the bottom surface of the case portion 21. In the medicinal effect test, the case portion 21 and the lid portion 22 are preferably chamfered so as not to damage the subcutaneous tissue of the mouse.
メインタンク３１は、分注タンク３２内の薬液が吐出されてなくなったときに、その分注タンク３２に補うための薬液を貯蔵しているタンクであり、内部の薬液量にしたがって自身の容積を変化させる伸縮自在なものである。 The main tank 31 is a tank that stores a chemical solution to be supplemented to the dispensing tank 32 when the chemical solution in the dispensing tank 32 is no longer discharged. It is a stretchable thing to change.
分注タンク３２は、マウスに注入される薬液量に相当する薬液を貯蔵しているタンクであり、内部を全てスポンジ状部材６によって満たされ、このスポンジ状部材６の容積にしたがって自身の容積を変化させる伸縮自在なものである。分注タンク３２内のスポンジ状部材６は、その一端を分離帯３３を通ってメインタンク３１内に延出している。そのため、そのスポンジ状部材６は、毛細管現象によりメインタンク３１内の薬液を吸い込み、圧迫部材４から圧迫されると薬液を放出し、圧迫から開放されると復元して再びメインタンク３１内の薬液を吸収する機能を有する。スポンジ状部材６の容積及び種類は、マウスへの薬液注入量に合わせて予め選択される。例えばマウスに間欠的に極微量の薬液を注入する場合、スポンジ状部材６の容積を小さくし、又は薬液吸収能力の低いものとする。こうすることにより、吐出させたい極微量の薬液がスポンジ状部材６を介して分注タンク３２内に貯蔵される。上記のようなスポンジ状部材６として、例えばＰＶＡ（ポリビニルアルコール）スポンジ又はＰＵ（ポリウレタン）スポンジ等が用いられる。また、袋状部材３は、１回のテスト毎に新しいものに交換され、若しくはその内部に薬液が補充される。 The dispensing tank 32 is a tank that stores a chemical solution corresponding to the amount of the chemical solution to be injected into the mouse. The inside of the dispensing tank 32 is filled with the sponge-like member 6, and its volume is increased according to the volume of the sponge-like member 6. It is a stretchable thing to change. One end of the sponge-like member 6 in the dispensing tank 32 extends into the main tank 31 through the separation band 33. Therefore, the sponge-like member 6 sucks the chemical solution in the main tank 31 by capillary action, releases the chemical solution when pressed from the compression member 4, and restores the chemical solution in the main tank 31 when released from the compression. It has a function of absorbing water. The volume and type of the sponge-like member 6 are selected in advance according to the amount of drug solution injected into the mouse. For example, when a very small amount of drug solution is intermittently injected into a mouse, the volume of the sponge-like member 6 is reduced or the drug solution absorption capacity is low. By doing so, a very small amount of chemical liquid to be discharged is stored in the dispensing tank 32 via the sponge-like member 6. As the sponge member 6 as described above, for example, PVA (polyvinyl alcohol) sponge or PU (polyurethane) sponge is used. Further, the bag-like member 3 is replaced with a new one for each test, or a chemical solution is replenished therein.
分離帯３３は、袋状部材３内に含ませた薬液が大容量と小容量とに分けて貯蔵されるようにするために設けられたくびれ状の部分である。この分離帯３３は、分注タンク３２が圧迫部材４に圧迫されている際に、自身も強く圧迫されて内部を通るスポンジ状部材６を押し潰すことにより、薬液がメインタンク３１と分注タンク３２との間で瞬時に移動することを抑制する。なお、分離帯３３は、圧迫部材４から受ける力に耐え得るようにメインタンク３１及び分注タンク３２よりも厚みを増すように補強されてもよい。 The separation band 33 is a constricted portion provided so that the chemical liquid contained in the bag-like member 3 is stored in a large volume and a small volume. When the dispensing tank 32 is compressed by the compression member 4, the separation band 33 compresses the sponge-like member 6 that is also strongly compressed and passes through the inside, so that the chemical solution is separated from the main tank 31 and the dispensing tank. It is suppressed that it moves to 32 instantly. The separation band 33 may be reinforced so as to be thicker than the main tank 31 and the dispensing tank 32 so as to withstand the force received from the compression member 4.
圧迫部材４は、長尺状の平板状部材により構成された磁性体であり、図２（ｂ）に示すように、圧迫部材４をポンプケース２に支持するための支持部４１と、袋状部材３を圧迫する圧迫部４２と、圧迫部４２から電磁コイル５側へ突出している突出部４３と、を有している。 The compression member 4 is a magnetic body composed of an elongated flat plate-like member, and as shown in FIG. 2B, a support portion 41 for supporting the compression member 4 on the pump case 2, and a bag shape It has the compression part 42 which presses the member 3, and the protrusion part 43 which protrudes from the compression part 42 to the electromagnetic coil 5 side.
支持部４１は、ヒンジピン８を挿通するための挿通孔４４を有し、ポンプケース２の凹部２３に嵌め込まれている。ヒンジピン８が、挿通孔４４，２４，４４に挿通されて、支持部４１がポンプケース２に回動自在に支持されている。この構成により、支持部４１は、圧迫部材４が回動する際の支点としての回動支点部４５となっている。 The support portion 41 has an insertion hole 44 through which the hinge pin 8 is inserted, and is fitted into the recess 23 of the pump case 2. The hinge pin 8 is inserted into the insertion holes 44, 24, 44, and the support portion 41 is rotatably supported by the pump case 2. With this configuration, the support portion 41 serves as a rotation fulcrum portion 45 as a fulcrum when the compression member 4 rotates.
圧迫部４２は、袋状部材３を圧迫するのに必要な面積を有する。圧迫部４２の回動端寄りは、電磁コイル５によって磁性体が磁気吸引されることにより圧迫部材４を回動支点部４５回りに回動させる作用部４６となっている。また、圧迫部４２は、回動支点寄りにおいてメインタンク３１を圧迫し、回動端寄りにおいて分注タンク３２を圧迫し、中間にある下方に凸形状に折曲した部分が分離帯３３を圧迫する規制部４７となっている。この規制部４７は、圧迫部４２が分注タンク３２を圧迫している際に分離帯３３を圧閉し、この分離帯３３に薬液の瞬時の移動を抑制させることにより、薬液の吐出量を規制する機能を有する。 The pressing part 42 has an area necessary for pressing the bag-like member 3. Near the rotation end of the compression portion 42 is an action portion 46 that rotates the compression member 4 around the rotation fulcrum portion 45 by magnetically attracting the magnetic body by the electromagnetic coil 5. In addition, the compression part 42 compresses the main tank 31 near the rotation fulcrum, compresses the dispensing tank 32 near the rotation end, and a portion bent in a convex shape in the middle presses the separation band 33. It becomes the regulation part 47 to do. The regulating part 47 closes the separation band 33 when the compression part 42 presses the dispensing tank 32, and suppresses the instantaneous movement of the chemical liquid in the separation band 33, thereby reducing the discharge amount of the chemical liquid. Has a function to regulate.
突出部４３は、圧迫部４２に電磁コイル５の磁気吸引力を効果的に働かせて圧迫部材４が回動し易くするために設けられている。突出部４３の長さは、電磁コイル５の磁気吸引力の強さに応じて適宜に設定される。 The protruding portion 43 is provided in order to make the compression member 4 easily rotate by causing the magnetic attractive force of the electromagnetic coil 5 to effectively act on the compression portion 42. The length of the protrusion 43 is appropriately set according to the strength of the magnetic attractive force of the electromagnetic coil 5.
電磁コイル５は、図２（ｃ）に示すように、極板５１と、この極板５１に巻回されるコイル５２と、これらを囲むようにＵ字状に形成されたヨーク５３と、を有している。この電磁コイル５は、ポンプケース２の底面部に埋め込まれた釦状の小型電池（不図示）を電源とし、例えばポンプケース２に設けられた受信部が外部から特定周波数の電波を受信することにより動作する。電磁コイル５の構成は、上記に限られず、任意の構成とすることができる。 As shown in FIG. 2C, the electromagnetic coil 5 includes a pole plate 51, a coil 52 wound around the pole plate 51, and a yoke 53 formed in a U shape so as to surround them. Have. The electromagnetic coil 5 uses a button-shaped small battery (not shown) embedded in the bottom surface of the pump case 2 as a power source. For example, a receiving unit provided in the pump case 2 receives radio waves of a specific frequency from the outside. It works by. The configuration of the electromagnetic coil 5 is not limited to the above, and can be any configuration.
上記構成を有するマイクロポンプ１の動作について、図３を参照して説明する。図３（ａ）に示すように、電磁コイル５が通電されていないとき、袋状部材３が圧迫部材４から受ける力と袋状部材３自身の復元力とが釣り合った状態で、圧迫部材４が袋状部材３上に乗っている。次に、図３（ｂ）に示すように、電磁コイル５の通電が開始されると、圧迫部材４が電磁コイル５の磁気吸引力によって回動支点部４５回りに回動することにより、規制部４７が分離帯３３を圧閉する。これにより、メインタンク３１内の薬液が分注タンク３２へ瞬時に移動することを抑制されるので、分注タンク３２内の薬液が一定量に規制される。次に、図３（ｃ）に示すように、圧迫部材４の圧迫部４２が規制部４７を支点として分注タンク３２を更に圧迫する。これにより、分注タンク３２内の薬液が吐出チューブ７を通って外部へ吐出される。その後、電磁コイル５の通電が終わると、袋状部材３は、その復元力により圧迫部材４を押し上げて、図３（ａ）の状態に戻り、メインタンク３１内の薬液がスポンジ状部材６の毛細管現象により分注タンク３２内へ移動する。 The operation of the micropump 1 having the above configuration will be described with reference to FIG. As shown in FIG. 3A, when the electromagnetic coil 5 is not energized, the compression member 4 is in a state where the force received by the bag-like member 3 from the compression member 4 and the restoring force of the bag-like member 3 itself are balanced. Is on the bag-like member 3. Next, as shown in FIG. 3B, when energization of the electromagnetic coil 5 is started, the compression member 4 is rotated around the rotation fulcrum portion 45 by the magnetic attraction force of the electromagnetic coil 5, thereby restricting. The portion 47 closes the separation band 33. Thereby, since the chemical | medical solution in the main tank 31 is suppressed to move to the dispensing tank 32 instantaneously, the chemical | medical solution in the dispensing tank 32 is controlled by fixed amount. Next, as shown in FIG. 3C, the compression portion 42 of the compression member 4 further compresses the dispensing tank 32 with the restricting portion 47 as a fulcrum. Thereby, the chemical in the dispensing tank 32 is discharged to the outside through the discharge tube 7. After that, when the energization of the electromagnetic coil 5 is finished, the bag-like member 3 pushes up the compression member 4 by its restoring force and returns to the state of FIG. 3A, and the chemical solution in the main tank 31 is transferred to the sponge-like member 6. It moves into the dispensing tank 32 by capillary action.
このように本実施形態のマイクロポンプ１によれば、電磁コイル５の磁気吸引力によって回動した圧迫部材４が分注タンク３２を圧迫することにより、分注タンク３２内の薬液が吐出チューブ７から吐出されるので、簡単な構成で小型化し易いマイクロポンプを作製することができる。また、分離帯３３が規制部４７により圧閉され、薬液がメインタンク３１から分注タンク３２へ瞬時に移動することが抑制されて、分注タンク３２から一定の少量の薬液を精度良く吐出することができる。 As described above, according to the micropump 1 of the present embodiment, the compression member 4 rotated by the magnetic attractive force of the electromagnetic coil 5 presses the dispensing tank 32, so that the chemical solution in the dispensing tank 32 is discharged from the discharge tube 7. Therefore, a micropump that can be easily miniaturized with a simple configuration can be manufactured. In addition, the separation band 33 is closed by the regulating unit 47, and the instantaneous movement of the chemical liquid from the main tank 31 to the dispensing tank 32 is suppressed, and a certain small amount of the chemical liquid is discharged from the dispensing tank 32 with high accuracy. be able to.
次に、本発明の第２の実施形態に係るマイクロポンプについて、図４乃至図６を参照して説明する。以下においては、上記マイクロポンプ１と異なる点について述べる。図４及び図５に示すように、マイクロポンプ１ａにおいて、圧迫部材４の磁性体は、磁石９から成っている。磁石９は、分注タンク３２を挟んで電磁コイル５と対向するように配置されている。また、磁石９は、ポンプケース２の蓋部２２に取り付けられた支持部材１０によって電磁コイル５側に変位自在に支持されている。袋状部材３は、その分注タンク３２を電磁コイル５上に載置した状態でポンプケース２内に配置されている。電磁コイル５が磁石９を磁気吸引することにより、磁石９が電磁コイル５側へ変位して分注タンク３２が圧迫され、薬液が吐出チューブ７から吐出される。 Next, a micro pump according to a second embodiment of the present invention will be described with reference to FIGS. In the following, differences from the micropump 1 will be described. As shown in FIGS. 4 and 5, in the micropump 1 a, the magnetic body of the compression member 4 includes a magnet 9. The magnet 9 is disposed so as to face the electromagnetic coil 5 with the dispensing tank 32 interposed therebetween. The magnet 9 is supported on the electromagnetic coil 5 side by a support member 10 attached to the lid portion 22 of the pump case 2 so as to be displaceable. The bag-like member 3 is arranged in the pump case 2 with the dispensing tank 32 placed on the electromagnetic coil 5. When the electromagnetic coil 5 magnetically attracts the magnet 9, the magnet 9 is displaced toward the electromagnetic coil 5, the dispensing tank 32 is compressed, and the chemical solution is discharged from the discharge tube 7.
スポンジ状部材６は、図５（ａ）に示すように、全体として扁平状であって、メインタンク３１内に封入される矩形平板状のメイン部材６１と、分注タンク３２内に封入される円板状の分注部材６２と、これらの間に位置する直線状の分離部材６３と、から成る。分離部材６３は、メイン部材６１と分注部材６２とを連続一体となるように連結し、かつこれら部材６１，６２内の薬液を互いに分離する。また、分離部材６３は、メインタンク３１と分注タンク３２との間でくびれているので、分離部材６３における流量抵抗は、メイン部材６１及び分注部材６２における流量抵抗よりも大きくなっている。そのため、袋状部材３が圧迫された際、袋状部材３内の薬液は、分離部材６３を通ってメインタンク３１と分注タンク３２との間を瞬時に移動することを抑制される。なお、袋状部材３は、例えば熱収縮部材等を用いることによって、スポンジ状部材６の形状に沿って形成することができる。また、吐出チューブ７は、ポンプケース２の側面に設けられた吐出孔２５から外部へ延出されている。 As shown in FIG. 5A, the sponge-like member 6 is flat as a whole, and is enclosed in a rectangular flat plate-like main member 61 enclosed in the main tank 31 and the dispensing tank 32. It consists of a disc-shaped dispensing member 62 and a linear separating member 63 located between them. The separating member 63 connects the main member 61 and the dispensing member 62 so as to be continuously integrated, and separates the chemicals in these members 61 and 62 from each other. Further, since the separation member 63 is constricted between the main tank 31 and the dispensing tank 32, the flow resistance in the separation member 63 is larger than the flow resistance in the main member 61 and the dispensing member 62. Therefore, when the bag-like member 3 is pressed, the chemical solution in the bag-like member 3 is suppressed from moving instantaneously between the main tank 31 and the dispensing tank 32 through the separation member 63. Note that the bag-like member 3 can be formed along the shape of the sponge-like member 6 by using, for example, a heat shrink member or the like. Further, the discharge tube 7 extends to the outside from a discharge hole 25 provided on the side surface of the pump case 2.
磁石９は、図５（ｂ）に示すように、中空円筒状を有し、電磁コイル５側がＮ極、支持部材１０側がＳ極となるように着磁されている。支持部材１０は、磁石９の中心が挿入される棒状のガイドピン１１と、このガイドピン１１が取り付けられ、かつ電磁コイル５側とは反対側の蓋部２２に配置される円板状の鉄板１２（第２の磁性体）と、を有している。ガイドピン１１は、磁石９を電磁コイル５側又は鉄板１２側へと案内する。鉄板１２は、磁石９が電磁コイル５により磁気吸引されないとき分注タンク３２を圧迫しない位置に戻るように磁石９を吸着する。磁石９、ガイドピン１１及び鉄板１２の形状は、任意の形状とすることができる。 As shown in FIG. 5B, the magnet 9 has a hollow cylindrical shape, and is magnetized so that the electromagnetic coil 5 side has an N pole and the support member 10 side has an S pole. The support member 10 includes a rod-shaped guide pin 11 into which the center of the magnet 9 is inserted, and a disk-shaped iron plate to which the guide pin 11 is attached and disposed on the lid portion 22 opposite to the electromagnetic coil 5 side. 12 (second magnetic body). The guide pin 11 guides the magnet 9 to the electromagnetic coil 5 side or the iron plate 12 side. The iron plate 12 attracts the magnet 9 so that the magnet 9 returns to a position where the dispensing tank 32 is not compressed when the magnet 9 is not magnetically attracted by the electromagnetic coil 5. The shape of the magnet 9, the guide pin 11, and the iron plate 12 can be made into arbitrary shapes.
電磁コイル５は、図５（ｃ）に示すように、ヨーク５３にコイル５２が巻回されたものが用いられる。電磁コイル５は、その上面を平板にすることが好ましく、こうすれば、磁石９との間で分注タンク３２を均一に圧迫することができ、スポンジ状部材６内の薬液を効果的に放出させることができる。電磁コイル５の構成は、上記に限られず、任意の構成とすることができる。 As the electromagnetic coil 5, as shown in FIG. 5C, a coil having a coil 52 wound around a yoke 53 is used. The upper surface of the electromagnetic coil 5 is preferably a flat plate, so that the dispensing tank 32 can be uniformly compressed between the magnet 9 and the chemical solution in the sponge-like member 6 can be effectively released. Can be made. The configuration of the electromagnetic coil 5 is not limited to the above, and can be any configuration.
上記構成を有するマイクロポンプ１ａの動作について、図６を参照して説明する。電磁コイル５が通電されていないとき、磁石９は鉄板１２と吸着しており、分注タンク３２は圧迫されていない（前述の図４（ｂ）の状態）。図６（ａ）に示すように、電磁コイル５が、磁石９側がＳ極、それと反対側がＮ極となるように励磁されると、磁石９は、電磁コイル５の吸引力により、電磁コイル５側へ移動して分注タンク３２を圧迫する。このとき、分離部材６３の流量抵抗によってメインタンク３１及び分注タンク３２間で薬液の瞬時の移動が抑制されるので、分注タンク３２内の薬液が一定量に規制され、分離部材６３側よりも流量抵抗の小さい吐出チューブ７側から吐出される。図６（ｂ）に示すように、電磁コイル５の通電が終わると、鉄板１２が磁石９を吸着して、分注タンク３２が圧迫から開放されて元の状態に復元し、メインタンク３１内の薬液がスポンジ状部材６の毛細管現象により分注タンク３２内へ移動する。電磁コイル５の通電を終える代わりに、電磁コイル５が、磁石９側がＮ極、それと反対側がＳ極となるように励磁されてもよい。こうすることによっても、磁石９は、電磁コイル５の反発力により、鉄板１２側へ移動して鉄板１２と吸着する。 The operation of the micropump 1a having the above configuration will be described with reference to FIG. When the electromagnetic coil 5 is not energized, the magnet 9 is attracted to the iron plate 12, and the dispensing tank 32 is not compressed (the state shown in FIG. 4B). As shown in FIG. 6A, when the electromagnetic coil 5 is excited so that the magnet 9 side is an S pole and the opposite side is an N pole, the magnet 9 is attracted to the electromagnetic coil 5 by the attractive force of the electromagnetic coil 5. Move to the side and press the dispensing tank 32. At this time, since the instantaneous movement of the chemical solution between the main tank 31 and the dispensing tank 32 is suppressed by the flow resistance of the separation member 63, the chemical solution in the dispensing tank 32 is regulated to a certain amount, and from the separation member 63 side. Is also discharged from the discharge tube 7 side having a small flow resistance. As shown in FIG. 6 (b), when the energization of the electromagnetic coil 5 is finished, the iron plate 12 attracts the magnet 9, and the dispensing tank 32 is released from the pressure and restored to the original state. Is moved into the dispensing tank 32 by the capillary action of the sponge-like member 6. Instead of ending energization of the electromagnetic coil 5, the electromagnetic coil 5 may be excited so that the magnet 9 side has an N pole and the opposite side has an S pole. Also by doing so, the magnet 9 moves to the iron plate 12 side and is attracted to the iron plate 12 by the repulsive force of the electromagnetic coil 5.
このように本実施形態のマイクロポンプ１ａによれば、磁石９が分離帯３３を圧迫することなく分注タンク３２を圧迫するだけで、分注タンク３２内の薬液が吐出チューブ７から吐出されるので、より簡単な構成で小型化し易いマイクロポンプを作製できる。また、分離部材６３の流量抵抗によってメインタンク３１及び分注タンク３２間で薬液の瞬時の移動が抑制され、一定量に規制された分注タンク３２内の薬液を吐出チューブ７側から精度良く吐出することができる。 Thus, according to the micropump 1a of this embodiment, the chemical liquid in the dispensing tank 32 is discharged from the discharge tube 7 only by pressing the dispensing tank 32 without the magnet 9 pressing the separation band 33. Therefore, a micropump that can be easily miniaturized with a simpler configuration can be manufactured. Further, the instantaneous flow of the chemical liquid between the main tank 31 and the dispensing tank 32 is suppressed by the flow resistance of the separation member 63, and the chemical liquid in the dispensing tank 32 regulated to a certain amount is accurately discharged from the discharge tube 7 side. can do.
図７は、上記各実施形態のマイクロポンプ１，１ａの吐出チューブ７に取り付けられる逆流防止用のバルブ１３を示す。このバルブ１３は、下流側に底部を有し、かつ側面に孔部１４を有した円筒状のパイプ１５と、このパイプ１５の下流端の孔部１４を覆う柔軟性を有したチューブ１６と、を有している。パイプ１５は、その上流端が吐出チューブ７に取り付けられ、または、吐出チューブ７そのものであってもよい。 FIG. 7 shows a backflow prevention valve 13 attached to the discharge tube 7 of the micropump 1, 1 a of each of the above embodiments. The valve 13 has a cylindrical pipe 15 having a bottom portion on the downstream side and a hole portion 14 on a side surface, a tube 16 having flexibility to cover the hole portion 14 on the downstream end of the pipe 15, have. The upstream end of the pipe 15 may be attached to the discharge tube 7 or the discharge tube 7 itself.
このようなバルブ１３において、薬液が吐出チューブ７からパイプ１５の下流端に流れてくると、その薬液は孔部１４から染み出るようにしてチューブ１６へと流出する。ここで、チューブ１６はパイプ１５の下流端の側面に密着しているので、薬液がチューブ１６から孔部１４を通ってパイプ１５内に逆流することを防止する。 In such a valve 13, when the chemical liquid flows from the discharge tube 7 to the downstream end of the pipe 15, the chemical liquid flows out to the tube 16 so as to ooze out from the hole portion 14. Here, since the tube 16 is in close contact with the side surface of the downstream end of the pipe 15, the chemical liquid is prevented from flowing back from the tube 16 into the pipe 15 through the hole portion 14.
本発明は、上記実施形態の構成に限られず、発明の趣旨を変更しない範囲で種々の変更が可能である。例えば、マイクロポンプ１は、薬効テストに用いられるだけでなく、微量の液体を吐出するための用途としてそのまま用いられてもよい。また、ポンプケース２は、小型化されたものであれば、上記実施形態で示した形状に限られない。また、圧迫部材４は、任意の構成とすることができる。 The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the micropump 1 may not only be used for a medicinal effect test, but may be used as it is for discharging a small amount of liquid. Further, the pump case 2 is not limited to the shape shown in the embodiment as long as it is downsized. Moreover, the compression member 4 can be made into arbitrary structures.
１ マイクロポンプ
２ ポンプケース
３ 袋状部材
３１ メインタンク（大容量貯蔵部）
３２ 分注タンク（小容量貯蔵部）
３３ 分離帯（くびれ部）
４ 圧迫部材
４５ 回動支点部
４６ 作用部
４７ 規制部
５ 電磁コイル
６ スポンジ状部材
６３ 分離部材（くびれ部）
７ 吐出チューブ
８ ヒンジピン（ヒンジ）
９ 磁石（圧迫部材）
１１ ガイドピン
１２ 鉄板（第２の磁性体）
１３ 逆流防止用のバルブ
1 Micro pump 2 Pump case 3 Bag-shaped member 31 Main tank (large capacity storage)
32 Dispensing tank (small capacity storage)
33 Separation zone (constriction)
4 Compression member 45 Rotating fulcrum portion 46 Action portion 47 Restriction portion 5 Electromagnetic coil 6 Sponge-like member 63 Separation member (neck portion)
7 Discharge tube 8 Hinge pin (hinge)
9 Magnet (pressing member)
11 Guide pin 12 Iron plate (second magnetic body)
13 Backflow prevention valve
Claims (4)
前記袋状部材は、該袋状部材内に封入されて圧縮及び復元自在なスポンジ状部材と、該袋状部材の後記小容量貯蔵部内の液体を前記ポンプケース外へ吐出するための吐出チューブと、を有し、
前記袋状部材及びスポンジ状部材は、これら内部に含ませた液体が大容量と小容量とに分けて貯蔵されるように、くびれ部でもって連通された大容量貯蔵部及び小容量貯蔵部を有し、
前記くびれ部は、前記圧迫部材の変位初期において該圧迫部材により圧迫されて該袋状部材の大容量貯蔵部と小容量貯蔵部との間で液体が移動することを抑制し、
前記圧迫部材の磁性体が前記電磁コイルに磁気吸引されて変位することにより、前記袋状部材が圧迫されて、前記袋状部材及びスポンジ状部材の小容量貯蔵部に含まれる液体が一定量に規制されて前記吐出チューブから吐出されることを特徴とするマイクロポンプ。 A pump case, a flexible bag-like member provided in the pump case and impregnated with a liquid, and provided in the pump case and squeezed from above the bag-like member by being displaced A micropump comprising a compression member having a magnetic body, and an electromagnetic coil that magnetically attracts the magnetic body of the compression member to displace the compression member,
The bag-like member includes a sponge-like member that is enclosed in the bag-like member and can be compressed and restored, and a discharge tube for discharging the liquid in the small-capacity storage section described later of the bag-like member to the outside of the pump case. Have
The bag-like member and the sponge-like member are provided with a large-capacity storage unit and a small-capacity storage unit communicated by a constricted part so that the liquid contained in the bag-like member and the sponge-like member are stored separately in a large capacity and a small capacity. Have
The constricted portion is suppressed from liquid moving between the large reservoir and the small-capacity reservoir of has been bag-like member pressed by said pressing member in the displacement early the compression member,
When the magnetic body of the compression member is magnetically attracted and displaced by the electromagnetic coil, the bag-like member is compressed, and the liquid contained in the small-capacity storage part of the bag-like member and the sponge-like member becomes a certain amount. A micropump that is regulated and discharged from the discharge tube.
前記圧迫部材が回動することにより、前記規制部が前記くびれ部を圧閉し、さらに、前記くびれ部を圧閉したまま前記圧迫部材が前記規制部を支点として前記小容量貯蔵部を圧迫することを特徴とする請求項１に記載のマイクロポンプ。 The compression member is rotatably supported by a hinge on the pump case, and has a rotating fulcrum portion as a fulcrum when the compression member rotates at one end and a magnetic body by the electromagnetic coil at the other end. And a constricted portion of the bag-like member between the rotating fulcrum part and the action part to press the constricted part of the bag-like member between the acting part for rotating the compression member around the turning fulcrum part. A regulating part that regulates the discharge amount,
By the rotation of the compression member, the restricting portion closes the constricted portion, and further, the compressing member compresses the small capacity storage portion with the restricting portion as a fulcrum while the constricted portion is closed. The micro pump according to claim 1.
前記磁石と電磁コイルは、前記小容量貯蔵部を挟んで対向配置され、
前記磁石は、ガイドピンにより変位自在に設けられ、かつ前記電磁コイルにより磁気吸引されないとき前記小容量貯蔵部を圧迫しない位置に戻るように、該電磁コイルがある側とは反対側に、該磁石が吸着される第２の磁性体を配置したことを特徴とする請求項１に記載のマイクロポンプ。 The magnetic body of the compression member comprises a magnet that is displaced by being magnetically attracted by the electromagnetic coil and compresses the small-capacity storage unit,
The magnet and the electromagnetic coil are arranged opposite to each other with the small-capacity storage unit interposed therebetween,
The magnet is provided so as to be displaceable by a guide pin, and when the magnet is not magnetically attracted by the electromagnetic coil, the magnet is disposed on a side opposite to the side where the electromagnetic coil is located so as to return to a position where the small capacity storage unit is not compressed. The micro pump according to claim 1, wherein a second magnetic body to which water is adsorbed is disposed.
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