JP2012115330A - Electrode body - Google Patents

Electrode body Download PDF

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JP2012115330A
JP2012115330A JP2010265667A JP2010265667A JP2012115330A JP 2012115330 A JP2012115330 A JP 2012115330A JP 2010265667 A JP2010265667 A JP 2010265667A JP 2010265667 A JP2010265667 A JP 2010265667A JP 2012115330 A JP2012115330 A JP 2012115330A
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electrode
support tube
internal
core member
internal electrode
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Hiromi Okawa
浩美 大川
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Horiba Ltd
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Horiba Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a comparison electrode capable of being deformed without largely impairing a service life or a function as an electrode body such as the comparison electrode, capable of keeping on maintaining a shape thereof even in a state that the comparison electrode is deformed by a bend or the like, and easy to be fixed inside the body or the like even in a single body.SOLUTION: The comparison electrode 100 includes a support tube 1 storing an internal electrode 3, and an internal liquid 2 electrically connecting the internal electrode 3 and a sample liquid. The comparison electrode includes a rod-shaped core member 4 stored inside the support tube 1, and extending from the internal electrode 3 to the tip side or the base end side of the support tube 1, the support tube 1 allows bending, and the core member 4 has plasticity.

Description

本発明は、電極電位の算出や電気化学測定の基準となる比較電極、pHや各種イオン種を測定するために用いられる測定電極等を含む電極体に関するものである。   The present invention relates to an electrode body including a reference electrode used as a reference for calculation of electrode potential and electrochemical measurement, a measurement electrode used for measuring pH and various ion species, and the like.

pH測定等において一定の基準電位を提示するために用いられる比較電極は、例えばガラス製の支持管の内部に、銀/塩化銀等からなる内部電極及び高濃度のKCl溶液からなる内部液を収容されており、前記内部液に前記内部電極が浸るように構成されている。そして、前記支持管の先端部に形成されており、セラミックスやガラス等の多孔質部材からなる液絡部を介して前記内部液が支持管の外側にある試料液体に接触するように構成されている。   The reference electrode used to present a constant reference potential in pH measurement and the like accommodates, for example, an internal electrode made of silver / silver chloride or the like and an internal solution made of a high-concentration KCl solution inside a glass support tube. The internal electrode is immersed in the internal liquid. And it is formed in the tip part of the above-mentioned support pipe, and it is constituted so that the above-mentioned internal liquid may contact the sample liquid outside the support pipe through the liquid junction part which consists of porous members, such as ceramics and glass Yes.

このような比較電極において、特に人体内に留置可能であり、かつ洗浄等を行いやすくしたものとして、図6に示すような前記支持管1Aがガラスではなくカテーテルにより形成されているものが特許文献1に開示されている。   In such a comparative electrode, in particular, the support tube 1A as shown in FIG. 6 is formed of a catheter instead of glass as being capable of being placed in the human body and easily cleaned. 1 is disclosed.

より具体的には、特許文献1に記載の比較電極100Aは、支持管に相当する可撓性を有するカテーテル1Aと、前記カテーテル1Aの基端側から先端側へと挿入された内部電極に相当する銀―塩化銀電極3Aと、前記カテーテル1Aの先端を塞ぐように設けられた内部液2Aを含むとともに液絡部に相当する多孔質糸5Aと、前記カテーテル1Aの基端から前記多孔質糸5Aまでの間の内部空間を塞ぐように設けられ、前記銀―塩化銀電極と前記多孔質糸5Aを前記カテーテル1A内部に固定する樹脂10Aとから構成されている。このような基準電極100Aであれば、カテーテル1Aによって支持管が形成されているので、医療用の用途に用いることができる。   More specifically, the comparative electrode 100A described in Patent Document 1 corresponds to a flexible catheter 1A corresponding to a support tube and an internal electrode inserted from the proximal end side to the distal end side of the catheter 1A. A silver-silver chloride electrode 3A, an internal liquid 2A provided so as to close the distal end of the catheter 1A and a porous thread 5A corresponding to a liquid junction, and the porous thread from the proximal end of the catheter 1A It is provided so as to close the internal space up to 5A, and is composed of the silver-silver chloride electrode and the resin 10A for fixing the porous thread 5A inside the catheter 1A. Such a reference electrode 100A can be used for medical use because the support tube is formed by the catheter 1A.

特許公告平3−74951Patent Publication 3-74951

しかしながら、このような人体内等に留置可能に構成された比較電極であっても、基準電極を大きく変形させたり、その変形させた状態を保ったりすることがしにくいので、例えば、口腔等のような内部が入り組んだ場所に用いられる場合等には使い勝手が悪い。より具体的には、この比較電極は、可撓性を有するカテーテルを支持管にしているとはいっても、その基端側から多孔質糸までは樹脂により内部が固められているため仕様態様に応じて曲げることができず、また、カテーテルの先端側は多孔質糸が封入されているだけなので曲げることはできるものの変形させられる長さはごく限られているため使い勝手が悪い。   However, even with such a comparative electrode configured to be placed in the human body or the like, it is difficult to greatly deform the reference electrode or maintain the deformed state. When it is used in a place where the interior is complicated, it is inconvenient. More specifically, although this comparative electrode uses a flexible catheter as a support tube, the inside of the base end side to the porous thread is hardened with resin, so that the specification mode is maintained. It cannot be bent accordingly, and the distal end side of the catheter is only encapsulated with a porous thread, so that it can be bent, but the length to be deformed is very limited, so it is inconvenient.

仮にカテーテルの基端側を無理に曲げてしまうと、基端側にある銀―塩化銀電極の表面にある塩化銀膜が銀から剥離する恐れがあり、比較電極としての機能や寿命が低下してしまう恐れもある。   If the proximal end of the catheter is forcibly bent, the silver chloride film on the surface of the silver-silver chloride electrode on the proximal end may peel off from the silver, reducing the function and life of the reference electrode. There is also a risk.

さらにカテーテルの先端側を変形させた形状も時間の経過や変形させていた外力がなくなること等により、その形状が元に戻ってしまうことがあるので、口腔内の電位の基準とするために例えば液絡部を唾液に浸していたとしても何らかの拍子に離れてしまうことがある。液絡部が唾液等の基準点から離れてしまうとその時点でpHの測定等が行えなくなってしまう、又は測定データに不連続な点が出てしまう等といった問題が発生してしまう。   Furthermore, the shape of the distal end of the catheter deformed may return to its original shape due to the passage of time or the absence of deformed external force, etc. Even if the liquid junction is submerged in saliva, it may move away in some time. If the liquid junction part moves away from a reference point such as saliva, problems such as the measurement of pH being impossible at that time or discontinuous points appearing in the measurement data may occur.

また、この比較電極は単体では体内の液絡部の位置を固定しにくいので、例えば比較電極を体の表面にテープで固定する等されているが、そのようなテープの取り付け、取り外しは煩わしく、さらに使い勝手が悪くなってしまっている。   In addition, since this comparative electrode alone is difficult to fix the position of the liquid junction in the body, for example, the comparative electrode is fixed to the surface of the body with a tape, etc., but such attachment and removal of the tape is troublesome, Furthermore, usability has become worse.

本発明は、上述したような問題点を鑑みてなされたものであり、比較電極等の電極体としての機能や寿命を大きく損なうことなく変形させることができ、屈曲等により変形させた状態でもその形状を維持し続けることができ、単体でも体内等に固定しやすい比較電極を提供することを目的とする。   The present invention has been made in view of the problems as described above, and can be deformed without significantly deteriorating the function and life of the electrode body such as a comparative electrode, and even when deformed by bending or the like. An object of the present invention is to provide a comparative electrode that can maintain its shape and can be easily fixed in a body or the like alone.

すなわち、本発明の電極体は、内部電極と、前記内部電極及び試料液を電気的に接続する内部液と、を収容する支持管を具備する電極体であって、前記支持管内に収容されており、前記内部電極から前記支持管の先端側又は基端側へ向かって延びる棒状の芯部材を備え、前記支持管が曲げを許容するものであるとともに、前記芯部材が可塑性を有していることを特徴とする。ここで「電極体」とは電気化学測定において用いられる「比較電極」及び「測定電極」を総称するものである。また、「比較電極」とは、参照電極、照合電極、基準電極等とも呼ばれるものであり、基本的に同じものを指す。また「可塑性」とは、外力が取り払われた後でも歪みが残り、その変形形状が残る性質を言う。   That is, the electrode body of the present invention is an electrode body comprising a support tube that houses an internal electrode and an internal liquid that electrically connects the internal electrode and the sample solution, and is housed in the support tube. A rod-shaped core member extending from the internal electrode toward the distal end side or the proximal end side of the support tube, wherein the support tube allows bending, and the core member has plasticity. It is characterized by that. Here, the “electrode body” is a general term for “comparison electrode” and “measurement electrode” used in electrochemical measurement. The “comparison electrode” is also called a reference electrode, a reference electrode, a reference electrode, or the like, and basically refers to the same electrode. “Plasticity” refers to the property that distortion remains even after the external force is removed, and the deformed shape remains.

このようなものであれば、前記支持管の内部に可塑性を有した芯部材があるので、前記支持管において前記内部電極よりも先側を曲げた際に、前記芯部材により前記支持管の変形した形状を保持し続けることができる。従って、口腔内などの狭く複雑な形状をした場所であってもその形に合わせて変形させたうえで、その状態を維持し続けることができるので、基準点から電極体が離れてしまうのを防ぎやすい。   In such a case, since there is a plastic core member inside the support tube, the support member is deformed by the core member when the front side of the support tube is bent beyond the internal electrode. It is possible to continue holding the shape. Therefore, even if it is a narrow and complicated place such as in the oral cavity, it can be kept in its state after being deformed according to its shape, so that the electrode body is separated from the reference point. Easy to prevent.

さらに支持管を自由に変形させたうえでその形状を保持することができるので、前記支持管を例えばU字状に変形させた状態を維持させつづけることができ、例えば口の中に支持管の先端をひっかけておく等して単体でも電極体を固定しておくこともできるようになる。   Furthermore, since the shape of the support tube can be maintained after being freely deformed, the state in which the support tube is deformed into, for example, a U-shape can be maintained, and the support tube can be maintained in the mouth, for example. It is possible to fix the electrode body by itself, for example, by hooking the tip.

前記支持管の外側にある試料液が支持管内に流入し、前記内部液が汚染される等しても電極電位や測定精度等に影響が表れにくくするには、前記支持管の先端側に前記内部液と前記試料液とが接する液絡部が形成されており、前記内部電極が前記支持管の基端側に設けられ、前記内部電極から前記芯部材が前記支持管の先端側に向かって延びるように構成されていればよい。また、このようなものであれば、試料液に接触させる液絡部が支持管の先端側にあり、前記内部電極が支持管の基端側にあるので、測定のために支持管を曲げる場合に、前記内部電極を曲げることなく、変形させやすい。   In order to make it difficult for the sample liquid outside the support tube to flow into the support tube and the internal liquid is contaminated, etc. A liquid junction where the internal liquid and the sample liquid come into contact is formed, the internal electrode is provided on the proximal end side of the support tube, and the core member extends from the internal electrode toward the distal end side of the support tube. What is necessary is just to be comprised so that it may extend. Also, if this is the case, the liquid junction to be brought into contact with the sample solution is on the distal end side of the support tube, and the internal electrode is on the proximal end side of the support tube. In addition, the internal electrode is easily deformed without being bent.

前記芯部材が曲げやすく、その形状を維持しやすいものであり、かつ曲げた際に内部液に前記内部電極から塩化銀が剥離しないようにして測定精度に影響を与えないようにするための具体的な態様としては、前記内部電極が、銀からなる電極本体と、前記電極本体を覆うように形成された塩化銀からなる電極膜部とを具備する銀/塩化銀電極であり、前記芯部材が、前記内部電極から前記支持管の先端に向かって延びる銀線であればよい。このようなものであれば、芯部材の表面には前記電極膜部が存在しないので、曲げた際に膜が剥離すると言った不具合を防ぐことができる。また、前記内部電極と前記支持管の先端側の間だけを変形させることにより、前記電極膜部が剥離するのを防ぐことがしやすい。   The core member is easy to bend and is easy to maintain its shape, and in order to prevent the silver chloride from peeling off from the internal electrode to the internal liquid when bent, it does not affect the measurement accuracy As a specific aspect, the internal electrode is a silver / silver chloride electrode including an electrode body made of silver and an electrode film portion made of silver chloride formed so as to cover the electrode body, and the core member However, what is necessary is just a silver wire extended toward the front-end | tip of the said support tube from the said internal electrode. If it is such, since the said electrode film part does not exist in the surface of a core member, the malfunction that a film | membrane peels when bent can be prevented. Moreover, it is easy to prevent the electrode film part from being peeled off by deforming only between the internal electrode and the distal end side of the support tube.

前記芯部材及び前記内部電極を一体のものとして製造を容易にすることができ、前記支持管内に芯部材を配置しやすくするには、前記内部電極が、銀からなる電極本体と、前記電極本体を覆うように形成された塩化銀からなる電極膜部とを具備する銀/塩化銀電極であり、前記電極本体及び前記芯部材が1本の銀線で形成されていればよい。   The core member and the internal electrode can be integrated as one body to facilitate manufacture, and in order to make it easy to dispose the core member in the support tube, the internal electrode is made of an electrode body made of silver, and the electrode body A silver / silver chloride electrode having an electrode film portion made of silver chloride formed so as to cover the electrode, and the electrode body and the core member only need to be formed of one silver wire.

前記支持管の変形形状を固定しやすくするための前記芯部材の具体的な構成としては、前記芯部材が、前記内部電極から前記支持管の略先端まで延びるものであればよい。   As a specific configuration of the core member for facilitating fixing of the deformed shape of the support tube, it is sufficient that the core member extends from the internal electrode to substantially the tip of the support tube.

前記内部液への芯部材及び内部電極の構成する材料の溶出を防ぎ、長期間にわたって電極体としての機能を保持できるようにするには、前記内部電極及び前記芯部材の表面が絶縁体によりコーティングされており、前記内部電極の表面をコーティングする絶縁体には、微小穴が形成されていればよい。   In order to prevent elution of the material constituting the core member and the internal electrode into the internal liquid and to maintain the function as the electrode body for a long period of time, the surfaces of the internal electrode and the core member are coated with an insulator. The insulator that coats the surface of the internal electrode only needs to have micro holes.

電極体を変形させた状態で外力を加え続けなくてもその形状を保持し続けることができ、狭い測定箇所でも使いやすくするための別の態様としては、内部電極と、前記内部電極及び試料液を電気的に接続する内部液と、を収容する支持管を具備する電極体であって、前記支持管が可塑性を有していることを特徴とする電極体であればよい。   As another mode for making it easy to use even in a narrow measurement location, the shape can be maintained without applying external force while the electrode body is deformed. The internal electrode, the internal electrode, and the sample liquid An electrode body including a support tube that contains an internal liquid that electrically connects the support tube, and the support tube has plasticity.

このように本発明の電極体によれば、可撓性を有した前記支持管の内部に、可塑性を有した前記芯部材が内部電極にあるので、前記支持管を曲げる等して自由に変形させることができ、しかもその形状を維持し続けることができる。従って、電極体が測定点から離れてしまうのを防ぎやすくなる。さらに、測定する場所に合わせて支持管を変形させ、ひっかけておくなどできるので、電極体単体でも測定点の近傍で固定しておくことができるようになる。   Thus, according to the electrode body of the present invention, since the core member having plasticity is in the internal electrode inside the flexible support tube, it can be freely deformed by bending the support tube. In addition, the shape can be maintained. Therefore, it becomes easy to prevent the electrode body from moving away from the measurement point. Furthermore, since the support tube can be deformed and hooked according to the place to be measured, the electrode body alone can be fixed in the vicinity of the measurement point.

本発明の一実施形態に係る比較電極の構造を示す模式的断面図。The typical sectional view showing the structure of the comparative electrode concerning one embodiment of the present invention. 同実施形態における比較電極を曲げた状態を示す模式的断面図。The typical sectional view showing the state where the comparison electrode in the embodiment was bent. 本発明の別の実施形態に係る比較電極の構造を示す模式的断面図。The typical sectional view showing the structure of the comparison electrode concerning another embodiment of the present invention. 別の実施形態における比較電極の使用状態の一例を示す模式図。The schematic diagram which shows an example of the use condition of the comparison electrode in another embodiment. 本発明の更に別の実施形態に係る比較電極の構造を示す模式的断面図。The typical sectional view showing the structure of the comparative electrode concerning another embodiment of the present invention. 従来のカテーテルを用いた比較電極を示す模式図。The schematic diagram which shows the comparative electrode using the conventional catheter.

以下、本発明の一実施形態について図面を参照して説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図1(a)に示すように、本実施形態の電極体は例えば、歯科等の医療現場において口腔内等のpHを測定する際において、pH測定電極(図示しない)とともに用いられる比較電極100である。そして、この比較電極100は、pHを測定するための口腔内における基準電位を測定するために用いられるものである。この比較電極100は、筒状の可撓性を有するとともに、内部電極3及び内部液2を収容する支持管1と、前記支持管1の基端を塞ぐように設けてあるキャップ部6と、前記支持管1の先端に設けてある多孔質セラミックスからなる液絡部5と、を備えたものである。   As shown in FIG. 1A, the electrode body of the present embodiment is, for example, a comparative electrode 100 used together with a pH measurement electrode (not shown) when measuring pH in the oral cavity or the like in a medical field such as dentistry. is there. The reference electrode 100 is used for measuring a reference potential in the oral cavity for measuring pH. The comparison electrode 100 has a cylindrical flexibility, a support tube 1 that houses the internal electrode 3 and the internal liquid 2, and a cap portion 6 that is provided so as to close the base end of the support tube 1, And a liquid junction portion 5 made of porous ceramics provided at the tip of the support tube 1.

前記支持管1は、例えばシリコンチューブにより形成してあるものであり、外力が加えられた際に、その曲げを許容することができるものである。ただし、外力がかかっていない場合には、その変形形状は時間経過等によって元の形状に戻っていくものである。   The support tube 1 is formed of, for example, a silicon tube, and can be bent when an external force is applied. However, when no external force is applied, the deformed shape returns to the original shape over time.

前記内部電極3は、前記支持管1内において基端側に収容してあり、この内部電極3から前記キャップ部6に向かって、電気信号を外部に出力するための信号線8が延びており、当該内部電極3から支持管1の先端側に向かって、可塑性を有する棒状の芯部材4が延びている。この内部電極3は、いわゆる銀/塩化銀電極であり、図1(b)に示すように線状の銀からなる電極本体31と、電極本体31の表面を覆うように設けてある塩化銀からなる電極膜部32とから構成してある。   The internal electrode 3 is accommodated on the proximal end side in the support tube 1, and a signal line 8 for outputting an electric signal to the outside extends from the internal electrode 3 toward the cap portion 6. A rod-shaped core member 4 having plasticity extends from the internal electrode 3 toward the distal end side of the support tube 1. The internal electrode 3 is a so-called silver / silver chloride electrode, and is composed of an electrode body 31 made of linear silver and silver chloride provided so as to cover the surface of the electrode body 31 as shown in FIG. And an electrode film portion 32.

より具体的には、図1(b)に示すように前記信号線8、前記電極本体31、前記芯部材4は一本の銀線で構成してあり、前記支持管1内の基端部近傍にある一部のみを丸みを帯びた概略円筒状の塩化銀の塊で被膜しておくことにより、銀線の一部を内部電極3として構成してある。つまり、前記支持管1の基端側にある内部電極3から、前記液絡部5の手前まで延びており、当該液絡部5には接触しないようにしてある前記芯部材4の表面には、塩化銀による膜は存在しない。また、この実施形態においては、支持管1において芯部材4がある領域をいわゆる塩橋部と捉えることもできる。なお、前記内部電極3の構成について言い換えると、一本の銀線の少なくとも一部、特に側周面の少なくとも一部を概略円筒状に塩化銀の膜により覆うようにして形成しているともいえる。   More specifically, as shown in FIG. 1 (b), the signal line 8, the electrode body 31, and the core member 4 are composed of a single silver wire, and a base end portion in the support tube 1. A part of the silver wire is configured as the internal electrode 3 by coating only a part in the vicinity with a rounded, roughly cylindrical silver chloride lump. That is, the surface of the core member 4 that extends from the internal electrode 3 on the proximal end side of the support tube 1 to the front of the liquid junction 5 and does not contact the liquid junction 5 is provided on the surface of the core member 4. There is no film of silver chloride. Moreover, in this embodiment, the area | region with the core member 4 in the support pipe 1 can also be regarded as what is called a salt bridge part. In other words, regarding the configuration of the internal electrode 3, it can be said that at least a part of one silver wire, particularly at least a part of the side peripheral surface, is formed so as to be covered with a silver chloride film in a substantially cylindrical shape. .

さらに、前記内部電極3と前記芯部材4の表面には絶縁体であるフッ素樹脂により薄いコーティングが施してあり、前記内部電極3と内部液2との間では導通があるように、前記内部電極3の表面、すなわち塩化銀膜の表面を覆うフッ素樹脂には微小穴が形成してある。このようにすることで、内部液2への不要な銀イオンの流出を防ぐことができ、内部電極3及び芯部材4を保護して、長寿命化することができる。   Further, the surface of the internal electrode 3 and the core member 4 is thinly coated with a fluororesin as an insulator, and the internal electrode 3 and the internal liquid 2 are electrically connected so that the internal electrode 3 is electrically connected. Micropores are formed in the fluororesin that covers the surface of 3, ie, the surface of the silver chloride film. By doing in this way, the outflow of the unnecessary silver ion to the internal liquid 2 can be prevented, the internal electrode 3 and the core member 4 can be protected, and the life can be extended.

また、内部電極3が銀/塩化銀電極に合わせて前記内部液2はKClの高濃度溶液(本実施形態では、3.3mol/lKCl溶液)にしてあり、その液位は、前記液絡部5を下にした際において、前記支持管1の基端部にある内部電極3が前記内部液2に浸るようにしてある。この内部液2が液絡部5から流出する等して減少した際には、図1(a)に示すように前記キャップ部6の側面に開口している内部液補充口7から支持管1内部へと補充できるようにしてある。この内部液補充口7は、普段はゴム栓により蓋がしてあり、液絡部5が詰まった場合等に開放して内部液2の流出量を大きくして詰まりを流すために使用されることもある。なお、比較電極100を倒立して使用する場合、内部の気泡が移動して不都合が生じることもあるので、支持管1内を内部液2で充満させる、あるいは、内部液2にCMC(カルボキシルメチルセルロース)等を添加してゲル化してもよい。   In addition, the internal electrode 2 is a high-concentration solution of KCl (in this embodiment, a 3.3 mol / l KCl solution) in accordance with the silver / silver chloride electrode, and the liquid level is the liquid junction portion. The internal electrode 3 at the base end portion of the support tube 1 is immersed in the internal liquid 2 when 5 is turned down. When the internal liquid 2 is reduced by flowing out of the liquid junction portion 5 or the like, the support tube 1 is passed through the internal liquid replenishment port 7 opened on the side surface of the cap portion 6 as shown in FIG. It can be refilled inside. The internal liquid replenishing port 7 is usually covered with a rubber stopper, and is used to open the liquid junction portion 5 when the liquid junction portion 5 is clogged to increase the outflow amount of the internal liquid 2 and flow the clogging. Sometimes. In addition, when the comparative electrode 100 is used upside down, internal bubbles may move to cause inconvenience, so the inside of the support tube 1 is filled with the internal liquid 2 or the internal liquid 2 is filled with CMC (carboxylmethylcellulose). ) Etc. may be added to form a gel.

このように構成された比較電極100の先端側をU字状に曲げた場合の図2を参照しながらこの変形の状態について説明する。   A state of this deformation will be described with reference to FIG. 2 in the case where the tip end side of the comparative electrode 100 configured as described above is bent in a U shape.

図2に示すように、本実施形態では、前記支持管1における液絡部5と、前記内部電極3との間の部分のみを曲げるようにしてあり、例えばU字状に変形させることでフックのようにして使用することができる。このように外力を加えて前記支持管1を曲げると、銀線である芯部材4も併せて曲げられることになり、塑性変形が生じることにより芯部材4の形状は外力がなくなってもこのまま保ち続けられる。従って、芯部材4の外側にあるシリコンチューブである支持管1が元に戻ろうとしても芯部材4によってこのU次状の変形形状が保たれ続けることになる。   As shown in FIG. 2, in this embodiment, only the portion between the liquid junction 5 in the support tube 1 and the internal electrode 3 is bent. For example, the hook is formed by deforming it into a U shape. Can be used. When the support tube 1 is bent by applying an external force in this way, the core member 4 which is a silver wire is also bent together, and the shape of the core member 4 is maintained even when the external force is lost due to plastic deformation. I can continue. Therefore, even if the support tube 1, which is a silicon tube outside the core member 4, returns to its original state, the U-shaped deformed shape is maintained by the core member 4.

さらに、前記内部電極3が支持管1の基端側にあり、芯部材4のある部分だけを曲げることができるように構成してあるので、曲げた際に前記内部電極3に大きな力がかかることを防ぐことができる。このため、内部電極3を構成する電極膜部32の厚さを大きくして長期間使用できるようにしたとしても、この膜部分が曲げた際に割れにくくすることができ、塩化銀が剥離し、内部液2内に不純物として散らばることを防ぎやすい。   Furthermore, since the internal electrode 3 is located on the proximal end side of the support tube 1 and only a certain portion of the core member 4 can be bent, a large force is applied to the internal electrode 3 when bent. Can be prevented. For this reason, even if the thickness of the electrode film portion 32 constituting the internal electrode 3 is increased so that it can be used for a long time, it can be made difficult to break when the film portion is bent, and the silver chloride peels off. It is easy to prevent scattering as impurities in the internal liquid 2.

また、前記信号線8、前記電極本体31、前記芯部材4を一本の銀線で構成してあり、一部だけを塩化銀で被覆して電極膜部32を形成することにより、内部電極3を形成してあるので、製造を非常に容易にすることができる。   In addition, the signal line 8, the electrode body 31, and the core member 4 are made of a single silver wire, and only a part thereof is covered with silver chloride to form the electrode film portion 32, whereby the internal electrode Since 3 is formed, manufacturing can be made very easy.

次に、その他の実施形態について説明する。   Next, other embodiments will be described.

図3に示すようにキャップ部6に内部液補充口7を設けずに使い切りの比較電極100とするとともに、前記支持管1を鉛筆等と同じ程度の太さで細長く形成して、芯部材4が前記支持管1の内径よりも若干小さい程度にしても構わない。このようにすれば、非常に細く、小さい比較電極100とすることができるとともに、先端部分の形状を自由に変形させてその形状を保持させつづけることができる。具体的な利用方法の一例としては、図4に示すように例えば、U字状に変形させておき、人の口腔内等にひっかけておくだけで、常に液絡部5が口腔内の唾液に接触するようにしておくことができ、新たなテープ等の固定具等を用いなくてもよくなる。また、比較電極100を自由に曲げられるので、口腔内のような狭く複雑な形状をした空間内でも好適に用いることができる。   As shown in FIG. 3, the cap portion 6 is not provided with the internal liquid replenishment port 7 and is used as a comparative reference electrode 100, and the support tube 1 is formed to be as thin and thin as a pencil, etc. May be slightly smaller than the inner diameter of the support tube 1. In this way, the reference electrode 100 can be made very thin and small, and the shape of the tip portion can be freely deformed to keep the shape. As an example of a concrete usage method, as shown in FIG. 4, for example, it is deformed into a U shape, and it is always caught in a person's oral cavity. It can be made to contact, and it becomes unnecessary to use fixtures, such as a new tape. Further, since the comparison electrode 100 can be bent freely, it can be suitably used even in a narrow and complicated space such as the oral cavity.

前記実施形態では、内部電極3は支持管1の基端側に設けてあったが、例えば図5に示すように前記内部電極3を支持管1の先端側に設けておき、前記芯部材4を支持管1の先端側へ向かって延ばすように構成しても構わない。この際、前記芯部材4は、前記実施形態での信号線8を兼ねるものであってもよい。また、内部電極3の位置は前記支持管1の先端側又は基端側に限られるものではなく、中央部等のその他の位置であっても構わない。要するに前記支持管1において自由に曲げたい領域に、前記内部電極3から芯部材4を延ばすようにすればよい。加えて、前記内部電極3は銀/塩化銀電極に限られるものではなく、カロメル電極等その他の電極であっても構わない。また、内部溶液もKClの高濃度溶液だけに限られるものではなく、例えばNaCl等その他の塩化物イオンを含む溶液であっても構わない。   In the embodiment, the internal electrode 3 is provided on the proximal end side of the support tube 1. However, for example, as shown in FIG. 5, the internal electrode 3 is provided on the distal end side of the support tube 1 and the core member 4. May be configured to extend toward the distal end side of the support tube 1. At this time, the core member 4 may also serve as the signal line 8 in the embodiment. Further, the position of the internal electrode 3 is not limited to the distal end side or the proximal end side of the support tube 1, and may be another position such as a central portion. In short, the core member 4 may be extended from the internal electrode 3 to a region where the support tube 1 is desired to be bent freely. In addition, the internal electrode 3 is not limited to a silver / silver chloride electrode, and may be another electrode such as a calomel electrode. Further, the internal solution is not limited to a high concentration solution of KCl, and may be a solution containing other chloride ions such as NaCl.

前記実施形態では、前記芯部材と前記電極本体とは1本の銀線により形成してあったが、別体で形成しても構わない。例えば、前記芯部材だけ白金等の別の金属で形成しても構わない。また、芯部材により変形後の形状を保てるようにするのではなく、前記支持管自体が可塑性を有しており、芯部材を用いずに変形後の形状を保てるようにしても構わない。この場合、支持管の材質自体が可塑性を有するものであってもよいし、例えば、ストローに用いられているような蛇腹構造を支持管に形成しておき、任意に曲げた形状を保つことができるようにしてもよい。   In the said embodiment, although the said core member and the said electrode main body were formed with one silver wire, you may form separately. For example, only the core member may be formed of another metal such as platinum. In addition, the shape after deformation is not maintained by the core member, but the support tube itself has plasticity, and the shape after deformation may be maintained without using the core member. In this case, the material of the support tube itself may be plastic. For example, a bellows structure used for a straw may be formed on the support tube, and the bent shape may be kept arbitrarily. You may be able to do it.

加えて、液絡部としては、多孔質性セラミックに限られるものではなく、ピンホール型、スリーブ型等の様々な構造を用いてもよいし、例えばゲル化したイオン液体を支持管の先端部にはめ込んでおき、塩橋機能により試料液と内部液の電気的な接続が保つことができるようにしてもよい。また、液絡部の替わりに水素イオンに感応する応答膜を支持管に接続しておき、pH測定電極としてもよいし、各種イオンに応答する膜にすることで、各種イオン種測定に用いるイオン測定電極にしてもよい。すなわち、本発明は、比較電極以外の電極体として用いても構わない。イオン測定電極の具体例としては、前記実施形態における液絡部の代わりにCl応答性材料(AgClとAgS混合物等)の固体物により前記支持管の先端にはめ込んだ塩化物イオン電極が挙げられる。 In addition, the liquid junction is not limited to the porous ceramic, and various structures such as a pinhole type and a sleeve type may be used. For example, a gelled ionic liquid may be used at the tip of the support tube. It may be fitted and the electrical connection between the sample solution and the internal solution may be maintained by the salt bridge function. In addition, instead of the liquid junction, a response membrane that is sensitive to hydrogen ions is connected to the support tube, and may be used as a pH measurement electrode, or by using a membrane that responds to various ions, ions used for measuring various ion species It may be a measurement electrode. That is, the present invention may be used as an electrode body other than the comparative electrode. As a specific example of the ion measuring electrode, a chloride ion electrode fitted into the tip of the support tube by a solid material of Cl - responsive material (a mixture of AgCl and Ag 2 S, etc.) instead of the liquid junction in the embodiment is used. Can be mentioned.

また、本発明の比較電極は実施形態において説明したような人体内での測定にのみ用いるだけでなく、一般的なpH測定、イオン種測定等といったその他の測定においても用いることができる。   Further, the comparative electrode of the present invention can be used not only for the measurement in the human body as described in the embodiment, but also for other measurements such as general pH measurement and ion species measurement.

その他、本発明の趣旨に反しない限りにおいて、様々な変形や実施形態の組み合わせを行っても構わない。   In addition, various modifications and combinations of embodiments may be performed without departing from the spirit of the present invention.

100・・・比較電極(電極体)
1 ・・・支持管
2 ・・・内部液
3 ・・・内部電極
31 ・・・電極本体
32 ・・・電極膜部
4 ・・・芯部材
100: Comparative electrode (electrode body)
DESCRIPTION OF SYMBOLS 1 ... Support tube 2 ... Internal liquid 3 ... Internal electrode 31 ... Electrode main body 32 ... Electrode film | membrane part 4 ... Core member

Claims (5)

内部電極と、前記内部電極及び試料液を電気的に接続する内部液と、を収容する支持管を具備する電極体であって、
前記支持管内に収容されており、前記内部電極から前記支持管の先端側又は基端側へ向かって延びる棒状の芯部材を備え、
前記支持管が曲げを許容するものであるとともに、前記芯部材が可塑性を有していることを特徴とする電極体。
An electrode body comprising a support tube that houses an internal electrode and an internal liquid that electrically connects the internal electrode and the sample liquid,
A rod-shaped core member housed in the support tube and extending from the internal electrode toward the distal end side or the proximal end side of the support tube;
The electrode body, wherein the support tube allows bending, and the core member has plasticity.
前記支持管の先端側に前記内部液と前記試料液とが接する液絡部が形成されており、前記内部電極が前記支持管の基端側に設けられ、前記内部電極から前記芯部材が前記支持管の先端側に向かって延びるように構成された請求項1記載の電極体。   A liquid junction where the internal liquid and the sample liquid are in contact with each other is formed on the distal end side of the support tube, the internal electrode is provided on the proximal end side of the support tube, and the core member is connected to the core member from the internal electrode. The electrode body according to claim 1, wherein the electrode body is configured to extend toward a distal end side of the support tube. 前記内部電極が、銀からなる電極本体と、前記電極本体を覆うように形成された塩化銀からなる電極膜部とを具備する銀/塩化銀電極であり、
前記電極本体及び前記芯部材が1本の銀線で形成されている請求項1又は2記載の電極体。
The internal electrode is a silver / silver chloride electrode comprising an electrode body made of silver and an electrode film portion made of silver chloride formed so as to cover the electrode body,
The electrode body according to claim 1 or 2, wherein the electrode body and the core member are formed of a single silver wire.
前記内部電極及び前記芯部材の表面が絶縁体によりコーティングされており、前記内部電極の表面をコーティングする絶縁体には、微小穴が形成されている請求項1、2又は3記載の電極体。   The electrode body according to claim 1, 2 or 3, wherein surfaces of the internal electrode and the core member are coated with an insulator, and a microhole is formed in the insulator coating the surface of the internal electrode. 内部電極と、前記内部電極及び試料液を電気的に接続する内部液と、を収容する支持管を具備する電極体であって、
前記支持管が可塑性を有していることを特徴とする電極体。
An electrode body comprising a support tube that houses an internal electrode and an internal liquid that electrically connects the internal electrode and the sample liquid,
The electrode body, wherein the support tube has plasticity.
JP2010265667A 2010-11-29 2010-11-29 Electrode body Pending JP2012115330A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013228354A (en) * 2012-03-26 2013-11-07 Horiba Ltd Comparison electrode
JP2015137878A (en) * 2014-01-20 2015-07-30 東京瓦斯株式会社 Reference electrode for corrosion potential monitor and corrosion potential monitoring device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059149U (en) * 1983-09-28 1985-04-24 株式会社 堀場製作所 internal electrode
JP2001137193A (en) * 1999-09-03 2001-05-22 Nippon Koden Corp Sensor for living body

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059149U (en) * 1983-09-28 1985-04-24 株式会社 堀場製作所 internal electrode
JP2001137193A (en) * 1999-09-03 2001-05-22 Nippon Koden Corp Sensor for living body

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013228354A (en) * 2012-03-26 2013-11-07 Horiba Ltd Comparison electrode
JP2015137878A (en) * 2014-01-20 2015-07-30 東京瓦斯株式会社 Reference electrode for corrosion potential monitor and corrosion potential monitoring device

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