JP2015221137A - Electrode for brain wave measurement, head-mounted device having the same, and method for making the same - Google Patents

Electrode for brain wave measurement, head-mounted device having the same, and method for making the same Download PDF

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JP2015221137A
JP2015221137A JP2014106850A JP2014106850A JP2015221137A JP 2015221137 A JP2015221137 A JP 2015221137A JP 2014106850 A JP2014106850 A JP 2014106850A JP 2014106850 A JP2014106850 A JP 2014106850A JP 2015221137 A JP2015221137 A JP 2015221137A
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electrode
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良平 長谷川
Ryohei Hasegawa
良平 長谷川
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National Institute of Advanced Industrial Science and Technology AIST
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Abstract

PROBLEM TO BE SOLVED: To provide an electrode for brain wave measurement that allows high-performance brain wave measurement and suppresses the outflow of a conductive gel, and to provide a head-mounted device having the electrode and a method for making the electrode.SOLUTION: An electrode for brain wave measurement includes: a first electrode including a fiber material mass 1 which has absorbed a conductive gel or has been soaked therein; and a second electrode having a cylindrical part which holds the first electrode in contact with an opening inner wall of the cylindrical part. The cylindrical part has preferably any one of a comb shape, cylindrical shape, barrel shape, quadrangular prism shape, and polygonal column shape. A fiber material mass is soaked in a conductive gel, and a first electrode including the fiber material mass 1, which has absorbed the conductive gel or has been soaked therein, is held in contact with a cylindrical opening inner wall of a second electrode having the cylindrical opening inner wall, which makes it possible to make the electrode for brain wave measurement.

Description

本発明は、脳波計測に適した電極、該電極を備える頭部装着装置及び該電極の作製方法に関する。   The present invention relates to an electrode suitable for electroencephalogram measurement, a head-mounted device including the electrode, and a method for manufacturing the electrode.

近年、脳科学の進歩により、人の思考や行動と脳活動との関係性について様々な研究がなされている。脳活動などの生体信号に着目して外部機器を制御したり、他者に意思を伝達したりするBrain−Machine Interface(BMI)技術が注目されている。   In recent years, with the advancement of brain science, various studies have been conducted on the relationship between human thought and behavior and brain activity. The Brain-Machine Interface (BMI) technology, which focuses on biological signals such as brain activity, controls external devices and transmits intentions to others, has attracted attention.

本発明者は、脳活動の解析により意思を伝達できる意思伝達支援装置及び方法を開発してきた(特許文献1、2参照)。これらの特許文献で示したように、被験者の頭皮上脳波を記録する目的で、被験者に、脳波を測定するための脳波計電極を頭に装着する必要がある。例えば、脳波計電極を固定したヘッドキャップを用いることを示した。特許文献2で提案した脳波ヘッドキャップ一体型の超小型の8チャンネルの無線脳波計は、ネットや帽子を装着する感覚で、電極と入力装置とは無線で接続することにより、利用者の位置の自由度が高く小型化できる。無線化することにより、ケーブルがないため、ノイズレスで、安全でかつポータブルな脳波計測を可能とした。   The present inventor has developed a communication support apparatus and method capable of transmitting intention by analyzing brain activity (see Patent Documents 1 and 2). As shown in these patent documents, it is necessary to wear an electroencephalograph electrode for measuring an electroencephalogram on the head of the subject in order to record the electroencephalogram on the scalp of the subject. For example, it was shown that a head cap with an electroencephalograph electrode fixed was used. The ultra-compact 8-channel wireless electroencephalograph integrated with an electroencephalogram head cap proposed in Patent Document 2 senses the user's position by connecting the electrode and the input device wirelessly as if wearing a net or hat. High degree of freedom and miniaturization. By making it wireless, there is no cable, so noise-free, safe and portable EEG measurement is possible.

本発明者は、さらに開発を進め、導電性ゾルを台座内に充填して使用する電極を提案した(特許文献3参照)。図5は、特許文献3に図示されている「脳波測定用電極の部位名称を示す使用状態の参考断面図」である。図6は、特許文献3に図示されている「ヘッドギア本体に取り付けた状態の参考斜視図」である。脳波測定に適した電極本体50は、頭部に沿った形状をした硬質のヘッドギア本体54に台座51により取り付けて使用される。台座51は頭部に沿って変形し得る可撓性合成樹脂製であり、電極本体50上面の孔から導電性ゾルを台座内に充填してから脳波測定に使用する。電極本体50はコネクタ52を介してリード線53に電気的に接続されている。図6は、コネクタやリード線を省略した図であり、電極本体50と台座51がヘッドギア本体54に固定され、ヘッドギア本体54に無線用の発信部55が設けられている。   The present inventor has further developed and proposed an electrode that is used by filling a pedestal with a conductive sol (see Patent Document 3). FIG. 5 is a “reference cross-sectional view of the state of use showing the part name of the electroencephalogram measurement electrode” illustrated in Patent Document 3. FIG. 6 is a “reference perspective view in a state of being attached to a headgear body” illustrated in Patent Document 3. An electrode body 50 suitable for electroencephalogram measurement is used by being attached to a hard headgear body 54 shaped along the head by a pedestal 51. The pedestal 51 is made of a flexible synthetic resin that can be deformed along the head, and is used for electroencephalogram measurement after the conductive sol is filled into the pedestal from the hole on the upper surface of the electrode body 50. The electrode body 50 is electrically connected to the lead wire 53 via the connector 52. FIG. 6 is a diagram in which connectors and lead wires are omitted. The electrode main body 50 and the pedestal 51 are fixed to the headgear main body 54, and the radio transmission section 55 is provided on the headgear main body 54.

先行文献調査をしたところ、次のような特許文献があった。特許文献4では、頭部に被るプローブ装着具に、内蔵する脳波電極と電解液で半電池を構成し、チップから電解液が滲出する脳波測定用プローブを取り付ける構造が示されている。電極は例えば銀−塩化銀からなる電極板であり、チップは、KCl等の塩化物水溶液からなる電解液がゲル化剤によってコロイド状にゲル化したものである。チップが電解液のゲル化したものであるので、電解液が過剰に滲出せず、測定時に頭髪を汚すことがないと記載されている。また、高分子吸水性樹脂をEVA等のバインダーでブロック上に成型し、電解液を含有できるものでもよいと記載されている(段落13、14参照)。特許文献5では、中央ボアが貫通するプラスチックグロメットからなる電極のボアに、導電性ゲルを充填することが示されている(段落80参照)。   As a result of a prior literature search, there was the following patent document. Patent Document 4 shows a structure in which a probe mounting tool covering a head is configured with a built-in electroencephalogram electrode and an electrolytic solution, and a probe for measuring an electroencephalogram in which the electrolytic solution exudes from a chip is attached. The electrode is, for example, an electrode plate made of silver-silver chloride, and the tip is a colloidal gelation of an electrolytic solution made of an aqueous chloride solution such as KCl. It is described that since the chip is a gelled electrolyte solution, the electrolyte solution does not exude excessively and does not stain the hair during measurement. Further, it is described that a polymer water-absorbing resin may be molded on a block with a binder such as EVA and contain an electrolytic solution (see paragraphs 13 and 14). In Patent Document 5, it is shown that a conductive gel is filled in a bore of an electrode made of a plastic grommet through which a central bore passes (see paragraph 80).

特開2012−053656号公報JP 2012-053656 A 特開2012−073329号公報JP2012-073329A 意匠登録第1456882号公報Design Registration No. 1456882 特開平5−161621号公報JP-A-5-161621 特表2009−514629号公報Special table 2009-514629

従来から、脳波計測用の電極及び該電極を頭部に装着するための器具について開発が進められているが、意思伝達装置等の実用化に向けて、より高品質の脳波を、簡便に記録できる電極が不可欠である。   Conventionally, development of electrodes for electroencephalogram measurement and instruments for mounting the electrodes on the head has been underway, but for the practical use of intention communication devices, etc., higher-quality electroencephalograms can be easily recorded. A possible electrode is essential.

脳波計測用に、電極部に導電性ゾルを使用する場合、たとえ局所的に使用しようとしても広がって頭部(頭髪)にべっとりと付着してしまい、不快感の強さ、ケアの手間、計測精度の悪さなどの問題があった。本発明者による特許文献3の脳波測定用電極は、これらの問題を最小限に抑えることを目的として開発したものであるが、さらに、導電性液体が髪の毛に広がる不要な量を十分減らすとともに、脳波計測の精度を向上させることが望まれる。   When using electroconductive sol for the electroencephalogram measurement, even if it is used locally, it spreads and sticks to the head (hair), causing discomfort, care, and measurement There were problems such as poor accuracy. The electrode for electroencephalogram measurement of Patent Document 3 by the present inventor was developed for the purpose of minimizing these problems, and further sufficiently reduces the unnecessary amount of conductive liquid spreading to the hair, It is desirable to improve the accuracy of electroencephalogram measurement.

本発明は、これらの問題を解決しようとするものであり、脳波計測時の被験者や検査者等の使用者のユーザビリティを向上させることを目的とするものである。ユーザビリティとして、導電性液体が髪の毛に染み込む量を抑えること、検査後のケアが不要又は簡単であることなどがある。また、脳波測定の精度が高く高品質な脳波を検出できる電極及び該電極を備える頭部装着装置を提供することを目的とするものである。   The present invention is intended to solve these problems, and it is an object of the present invention to improve the usability of a user such as a subject or an examiner when measuring an electroencephalogram. Usability includes suppressing the amount of conductive liquid that permeates into the hair, and that care after inspection is unnecessary or simple. It is another object of the present invention to provide an electrode capable of detecting a high-quality electroencephalogram with high accuracy of electroencephalogram measurement and a head-mounted device provided with the electrode.

本発明は、前記目的を達成するために、以下の特徴を有する。   In order to achieve the above object, the present invention has the following features.

本発明の脳波計測用電極は、導電性ジェルを保持又は浸み込ませた繊維素材の塊からなる第1の電極と、前記第1の電極を開口部内壁で接触保持する筒状部を有する第2の電極とを備えることを特徴とする。前記筒状部は、例えば、クシ状、円筒状、たる状、四角柱状、多角柱状のいずれかであるか、これらの組み合わせであることが好ましい。即ち、前記筒状部は、例えば、クシ状、円筒状、たる状、四角柱状、多角柱状のいずれか1つ以上を含む形状であることが好ましい。   The electrode for electroencephalogram measurement of the present invention has a first electrode made of a lump of fiber material in which conductive gel is held or soaked, and a cylindrical part that holds the first electrode in contact with the inner wall of the opening. And a second electrode. The cylindrical portion is preferably, for example, a comb shape, a cylindrical shape, a barrel shape, a quadrangular column shape, a polygonal column shape, or a combination thereof. That is, it is preferable that the said cylindrical part is a shape containing any one or more of a comb shape, a cylindrical shape, a barrel shape, a square pillar shape, and a polygonal pillar shape, for example.

本発明の脳波計測用頭部装着装置は、本発明の脳波計測用電極を備えることを特徴とする。   The head mounted device for electroencephalogram measurement of the present invention comprises the electrode for electroencephalogram measurement of the present invention.

本発明の脳波計測用電極の作製方法は、繊維素材の塊を導電性ジェルに浸して、該導電性ジェルが保持された又は浸み込んだ前記繊維素材の塊からなる第1の電極を、筒状の開口部内壁を有する第2の電極の前記内壁で接触保持させることを特徴とする。   The method for producing an electroencephalogram measurement electrode of the present invention comprises immersing a mass of a fiber material in a conductive gel, and holding the first electrode made of the mass of the fiber material in which the conductive gel is held or soaked, The second electrode having a cylindrical opening inner wall is held in contact with the inner wall.

本発明は、導電性ジェルを保持又は浸み込ませた繊維素材の塊からなる第1の電極と、前記第1の電極を開口部内壁で接触保持する筒状部を有する第2の電極とを備えることにより、脳波計測に関する基本性能を維持したまま、髪の毛に染み込む量を抑える等のユーザビリティを大きく向上させることができる。   The present invention includes a first electrode made of a lump of fiber material in which conductive gel is held or soaked, and a second electrode having a cylindrical portion that holds the first electrode in contact with the inner wall of the opening. By providing the above, it is possible to greatly improve the usability such as suppressing the amount of soaking into the hair while maintaining the basic performance relating to the electroencephalogram measurement.

従来、ジェルが徐々に流れ出して長時間の記録が難しいという問題があったが、本発明によれば、繊維素材の塊に導電性ジェルを染みこませたり、導電性ジェルの粘着性により該導電性ジェルが繊維素材に吸着されて担持されるようにすることにより、ジェルが流れ出ることがない。   Conventionally, there has been a problem that the gel gradually flows out and it is difficult to record for a long time. However, according to the present invention, the conductive gel is infiltrated into the lump of the fiber material, or the conductive gel adheres to the conductive gel. By making the sex gel adsorbed and supported by the fiber material, the gel does not flow out.

従来は、粘性が強くて使いにくい導電性液体を、シリンジ等を使用して頭部装着用の電極内に流し込むという面倒な作業が必要であった。本発明によれば、導電性ジェルを染み込ませた繊維素材の略球状等の塊を、導電性の筒状の開口部内壁に接触保持するようにセットするだけでよいので、作業が簡単となり、脳波計測の準備にかかる時間を非常に少なくすることができる。   Conventionally, it has been necessary to carry out a troublesome work of pouring a conductive liquid that is highly viscous and difficult to use into a head-mounted electrode using a syringe or the like. According to the present invention, it is only necessary to set a substantially spherical lump of fiber material soaked with conductive gel so as to contact and hold the inner wall of the conductive cylindrical opening. The time required for preparation for electroencephalogram measurement can be greatly reduced.

筒状部として、クシ状電極を用いる場合は、頭髪にクシが入り込みやすいので、より頭皮に接触固定でき、高精度に脳波を計測できる。   When a comb-like electrode is used as the cylindrical portion, combs can easily enter the hair, so that the scalp can be contacted and fixed more accurately, and the electroencephalogram can be measured with high accuracy.

第1の実施の形態の脳波計測用電極の構造を示す概略図。Schematic which shows the structure of the electrode for electroencephalogram measurement of 1st Embodiment. 第1の実施の形態の脳波計測用電極の構造を示す概略図。Schematic which shows the structure of the electrode for electroencephalogram measurement of 1st Embodiment. 第1の実施の形態の脳波計測用電極のクシ状電極部を説明する斜視図。The perspective view explaining the comb-like electrode part of the electrode for electroencephalogram measurement of a 1st embodiment. 第1の実施の形態の脳波計測用電極のクシ状電極部の(a)平面図(b)クシ状側からの見た平面図(c)正面図。The (a) top view of the comb-like electrode part of the electrode for electroencephalogram measurement of a 1st embodiment (b) The top view seen from the comb-like side (c) front view. 従来技術の脳波計測用電極の断面図。Sectional drawing of the electrode for electroencephalogram measurement of a prior art. 従来技術の脳波計測用電極を取り付けたヘッドギア本体の斜視図。The perspective view of the headgear main body which attached the electrode for electroencephalogram measurement of a prior art.

本発明の実施形態について以下説明する。   Embodiments of the present invention will be described below.

本発明の脳波計測用電極は、導電性ジェルを保持又は浸み込ませた繊維素材の塊からなる第1の電極を、筒状の開口部内壁を有する第2の電極の前記内壁で接触保持させたものである。   In the electroencephalogram measurement electrode of the present invention, the first electrode formed of a lump of fiber material in which conductive gel is held or soaked is held in contact with the inner wall of the second electrode having a cylindrical opening inner wall. It has been made.

第2の電極は、繊維素材を保持できる筒状の開口部内壁を有している。第2の電極は、導電性を有する。例えば、金属製、あるいは表面が導電性を有する樹脂製等で形成することができる。   The second electrode has a cylindrical opening inner wall that can hold the fiber material. The second electrode has conductivity. For example, it can be formed of a metal or a resin whose surface has conductivity.

本発明において、繊維素材の塊は、第2の電極の筒状部の窪み部構造を構成するクシ状又たる状等の内壁に接触して保持され、導電性ジェルを浸み込ませた状態で重力によって自重により落ちることがない。導電性ジェルを浸み込ませた繊維素材の塊は、手または機械によりクシ状又たる状の窪みに装填される。   In the present invention, the lump of the fiber material is held in contact with the inner wall of the comb-like shape or the like that forms the hollow structure of the cylindrical portion of the second electrode, and the conductive gel is infiltrated It does not fall by its own weight due to gravity. The lump of fiber material soaked with the conductive gel is loaded into a comb-like or dent-like depression by hand or machine.

繊維素材の塊の形状は、繊維素材を丸めた形状であり、例えば、略球状である。完全な球状である必要はなく、電極の窪みに挿入しやすい塊状であれば足り、挿入後は電極の窪みの筒状の形状に応じて変形可能である。塊の形状は、例えば、球状、楕円球状、楕円体状、卵型、繭状、略円柱状等が挙げられ、立体的に対称形であっても非対称であってもよい。   The shape of the mass of the fiber material is a shape obtained by rounding the fiber material, and is, for example, substantially spherical. It is not necessary to have a perfect spherical shape, and a lump shape that can be easily inserted into the depression of the electrode is sufficient, and after insertion, it can be deformed according to the cylindrical shape of the depression of the electrode. Examples of the shape of the lump include a spherical shape, an elliptical spherical shape, an ellipsoidal shape, an egg shape, a bowl shape, and a substantially cylindrical shape, and may be three-dimensionally symmetric or asymmetric.

使用する繊維素材は、脱脂綿、羊毛、化学繊維、綿繊維、導電性繊維等を用いることができる。導電性ジェルが浸み込み易い脱脂綿等が好ましい。繊維素材は導電性である必要はない。   Absorbent cotton, wool, chemical fiber, cotton fiber, conductive fiber, or the like can be used as the fiber material to be used. Absorbent cotton or the like in which the conductive gel easily penetrates is preferable. The fiber material need not be electrically conductive.

導電性ジェルが染みこんだ状態の繊維素材の塊が、頭の皮膚に接触し、かつ第2の電極の窪みの導電体面に接触することにより、脳波計測用電極として機能する。   The lump of fiber material infiltrated with the conductive gel contacts the skin of the head and also contacts the conductor surface of the recess of the second electrode, thereby functioning as an electroencephalogram measurement electrode.

本発明で用いる導電性ジェルとして、高導電性高粘着性ジェルを用いることができる。高導電性の粘性液体である。繊維素材に染みこみ保持される性質を持つものが望ましい。繊維素材の繊維自身に染みこまなくとも、繊維素材に、ジェル自身の高粘着性の特性により付着することにより、繊維素材の塊に染みこむように、塊にジェルが担持されるものであればよい。繊維素材の塊に保持されているジェルは、頭部の皮膚に対しては十分に粘着して接触する。   As the conductive gel used in the present invention, a highly conductive and highly adhesive gel can be used. It is a highly conductive viscous liquid. Those having the property of being infiltrated and retained in the fiber material are desirable. Even if the fiber itself does not soak into the fiber itself, it is sufficient if the gel is supported on the mass so that it soaks into the mass of the fiber material by adhering to the fiber material due to the high adhesive properties of the gel itself. . The gel held in the mass of fiber material adheres sufficiently to the head skin.

従来、脳波計測用には、臨床現場では、歯磨き状(ペーストともいう。)の導電性ペーストを脳波電極に用いることが多かったが、本発明で用いる導電性ジェルは、歯磨き状の堅さのペーストではなく、繊維素材の塊に保持させなければ電極開口部内には保持できない液体であり、繊維素材の塊に保持されることにより流出しない程度の粘性をもつ液体である。   In the past, for electroencephalogram measurement, a toothpaste (also referred to as a paste) conductive paste was often used as an electroencephalogram electrode in clinical practice. However, the conductive gel used in the present invention has a toothpaste-like hardness. It is not a paste but a liquid that cannot be held in the electrode opening unless it is held in a lump of fiber material, and a liquid having a viscosity that does not flow out when held in a lump of fiber material.

本発明で使用可能な導電性ジェルとして、例えば、KCl、RbCl、CsCl、NaCl、LiCl、CaCl2、MgCl2等の塩化物水溶液からなる電解液をゲル化剤によってコロイド状にゲル化させたものが挙げられる。ゲル化剤として、例えば、CMC、PVA、ポリアクリル酸アミドなどの水溶性高分子、あるいは寒天、アルガロース、ゼラチン、ペプチン、シリカ系ゲル剤なども使用できる。 As the conductive gel usable in the present invention, for example, an electrolytic solution composed of an aqueous chloride solution such as KCl, RbCl, CsCl, NaCl, LiCl, CaCl 2 , MgCl 2 is colloidally gelled by a gelling agent. Is mentioned. As the gelling agent, for example, water-soluble polymers such as CMC, PVA, polyacrylic acid amide, agar, algarose, gelatin, peptin, silica gel and the like can be used.

(第1の実施の形態)
本実施の形態について図を参照して以下説明する。図1及び図2は、本実施の形態による脳波計測用電極を示す図である。本実施の形態の脳波計測用電極は、クシ状電極2と、導電性ジェルを浸み込ませた略球状の繊維素材の電極1とから構成される。本実施の形態の脳波計測用電極は、クシ状電極2の胴部に非導電性のアダプタ3が係合可能であり、アダプタ3を介して非導電性のヘッドギア本体に取り付けられる。クシ状電極2は、例えば、導電性金属でコーティングした樹脂製である。
(First embodiment)
This embodiment will be described below with reference to the drawings. 1 and 2 are diagrams showing an electroencephalogram measurement electrode according to the present embodiment. The electroencephalogram measurement electrode according to the present embodiment includes a comb-like electrode 2 and a substantially spherical fiber material electrode 1 in which a conductive gel is immersed. In the electroencephalogram measurement electrode of the present embodiment, the non-conductive adapter 3 can be engaged with the body portion of the comb-like electrode 2 and is attached to the non-conductive headgear body via the adapter 3. The comb-like electrode 2 is made of, for example, a resin coated with a conductive metal.

アダプタ3は、ヘッドギア本体への取り付けを容易にするように、アダプタの胴部周囲に輪状の凹部が設けられ、ヘッドギア本体と係合する。アダプタ3は、例えばシリコン樹脂製である。ヘッドギア本体は、例えば図6のような構造のものを用いることができ、硬質の樹脂製で作製することができる。電極を取り付ける頭部装着装置の構造は、図示の形状に限らない。キャップ状やネット状であってもよい。   The adapter 3 is provided with a ring-shaped recess around the body of the adapter so as to facilitate attachment to the headgear body, and engages with the headgear body. The adapter 3 is made of, for example, silicon resin. For example, a headgear body having a structure as shown in FIG. 6 can be used, and the headgear body can be made of a hard resin. The structure of the head mounting device to which the electrodes are attached is not limited to the shape shown in the figure. It may be a cap shape or a net shape.

図3に、クシ状電極2の斜視図を示す。(a)はクシ状部からの斜視図であり、(b)はクシ状部の反対側からの斜視図である。   FIG. 3 shows a perspective view of the comb-like electrode 2. (A) is a perspective view from a comb-shaped part, (b) is a perspective view from the opposite side of a comb-shaped part.

図4に、クシ状電極2の、(a)クシ状反対側から見た平面図、(b)クシ状側から見た平面図、(c)正面図を示す。クシ状電極2は、複数の棒状の突起が円筒状に配置形成されてなるクシ状部分21と、複数の棒状の突起を林立させるための土台となる土台板部分22と、ヘッドギア本体等への取り付けのためのアダプタが装着される筒状胴部分23と、コネクタを介してあるいは介さずにリード線に接続するための頭部分24と、土台板部分22と筒状胴部分23と頭部分24を貫通する孔25とを備えている。孔25は、クシ状部分21の開口径、土台板部分22の開口径、筒状胴部分23の開口径、頭部分24の開口径の順に狭くなるように形成されている。図では、孔が漸次狭くなっているが、段階的に狭くなってもよい。孔の開口形状を徐々に狭くすることにより、繊維の塊がよりしっかりと定位置に固定保持される。固定された繊維の塊は、一部、クシ状電極から突出した構造であり、頭皮近くに位置して脳波計測を高精度で実現する。   FIG. 4 shows (a) a plan view of the comb-like electrode 2 as viewed from the comb-like opposite side, (b) a plan view as seen from the comb-like side, and (c) a front view. The comb-like electrode 2 includes a comb-like portion 21 in which a plurality of rod-like projections are arranged and formed in a cylindrical shape, a base plate portion 22 that serves as a base for setting up the plurality of rod-like projections, and a headgear body. A cylindrical body portion 23 to which an adapter for attachment is mounted, a head portion 24 for connection to a lead wire with or without a connector, a base plate portion 22, a cylindrical body portion 23, and a head portion 24 And a hole 25 penetrating through. The hole 25 is formed so as to become narrower in the order of the opening diameter of the comb-shaped portion 21, the opening diameter of the base plate portion 22, the opening diameter of the cylindrical body portion 23, and the opening diameter of the head portion 24. In the figure, the holes are gradually narrowed, but may be narrowed in stages. By gradually narrowing the opening shape of the hole, the fiber mass is more firmly fixed and held in place. The fixed fiber lump partly protrudes from the comb-like electrode, and is located near the scalp to realize brain wave measurement with high accuracy.

本実施の形態の脳波計測用電極は、略球状にした繊維に導電性ジェルを染み込ませ、導電性ジェルを含んだ略球状の繊維の塊を、図2のようなクシ状電極の、クシ状に林立した棒状突起に囲まれた窪みに挿入することにより、繊維素材がクシ状突起の内壁に接触保持される。導電性ジェルを染み込ませた球状繊維を複数の電極の個数分作製して、上述のように、クシ状電極の窪みに挿入して接触保持させる。クシ状電極の窪みに略球状繊維が挿入されると、繊維が緩む膨張力と、導電性ジェルの粘性などによって、クシ状突起の内壁に、ジェルを含む略球状の繊維が接触保持されるので、繊維が窪みから外れたり、導電性ジェルが頭部に流れ出したりすることがない。   The electroencephalogram measurement electrode according to the present embodiment impregnates a substantially spherical fiber with a conductive gel, and a substantially spherical fiber lump containing the conductive gel is formed into a comb-like electrode of FIG. The fiber material is held in contact with the inner wall of the comb-like projections by being inserted into the recess surrounded by the rod-like projections that are forested. Spherical fibers impregnated with conductive gel are prepared for the number of the plurality of electrodes, and are inserted into the depressions of the comb-like electrodes and held in contact as described above. When a substantially spherical fiber is inserted into the recess of the comb-like electrode, the substantially spherical fiber containing the gel is held in contact with the inner wall of the comb-like projection due to the expansion force that the fiber loosens and the viscosity of the conductive gel. The fiber does not come out of the recess and the conductive gel does not flow out to the head.

本実施の形態においては、略球状の繊維として、脱脂綿を球状にして使用した。また、本実施の形態においては、導電性ジェルとして、高粘着性で、水溶性で、油分なしで、非刺激性で、非腐食性の高伝導性高粘着性ゲルを使用した。   In the present embodiment, absorbent cotton is used in a spherical shape as a substantially spherical fiber. In the present embodiment, a highly adhesive, water-soluble, oil-free, non-irritating, non-corrosive, highly conductive and highly adhesive gel is used as the conductive gel.

(第2の実施の形態)
本実施の形態では、第1の実施の形態で説明したクシ状電極2のクシ状部分21の構造を、棒状間に空隙がない形状、円筒状、あるいは、円筒中央部が膨らむ樽状にしてもよい。また、その一部を、第1の実施の形態のようなクシ状にしてもよい。
(Second Embodiment)
In the present embodiment, the structure of the comb-like portion 21 of the comb-like electrode 2 described in the first embodiment is made into a shape having no gap between the rod-like shapes, a cylindrical shape, or a barrel shape in which the central portion of the cylinder swells. Also good. Further, a part thereof may be comb-like as in the first embodiment.

上記実施の形態で示した例は、クシ状、円筒状、樽状であり、これらは概略円筒形状のものであるが、円筒である必要はなく、四角柱や多角柱等の形状が可能であり、概略筒状で、繊維素材の塊を接触保持可能な形状であればよい。   The examples shown in the above embodiment are comb-like, cylindrical, and barrel-like, and these are generally cylindrical, but need not be cylindrical, and can be in the shape of a quadrangular prism or a polygonal prism. Yes, as long as it is substantially cylindrical and can hold a mass of fiber material in contact.

上記実施の形態等で示した例は、発明を理解しやすくするために記載したものであり、この形態に限定されるものではない。   The examples shown in the embodiment and the like are described for easy understanding of the invention, and are not limited to this embodiment.

本発明によれば、脳波計測用の電極として、医療上の検査や治療目的の脳波計測装置や、脳波による意思伝達装置や、脳波による感性評価システムや、脳波による認知機能評価システム等に応用できるので、産業上有用である。   According to the present invention, as an electrode for electroencephalogram measurement, it can be applied to an electroencephalogram measurement apparatus for medical examination or treatment, an intention transmission apparatus by electroencephalogram, a sensitivity evaluation system by electroencephalogram, a cognitive function evaluation system by electroencephalogram, and the like. So it is industrially useful.

1 繊維素材の塊
2 クシ状電極
3 アダプタ
21 クシ状部分
22 土台板部分
23 筒状胴部分
24 頭部分
25 孔
50 電極本体
51 台座
52 コネクタ
53 リード線
54 ヘッドギア本体
55 無線用の発信部

DESCRIPTION OF SYMBOLS 1 Fiber material lump 2 Comb-like electrode 3 Adapter 21 Comb-like part 22 Base plate part 23 Cylindrical trunk part 24 Head part 25 Hole 50 Electrode main body 51 Base 52 Connector 53 Lead wire 54 Headgear main body 55 Radio transmission part

Claims (4)

導電性ジェルを保持又は浸み込ませた繊維素材の塊からなる第1の電極と、前記第1の電極を開口部内壁で接触保持する筒状部を有する第2の電極とを備えることを特徴とする脳波計測用電極。   A first electrode made of a lump of fiber material holding or soaked with a conductive gel, and a second electrode having a cylindrical portion that holds the first electrode in contact with the inner wall of the opening. Electrode for measuring EEG features. 前記筒状部は、クシ状、円筒状、たる状、四角柱状、多角柱状のいずれかを1つ以上を含む形状であることを特徴とする請求項1記載の脳波計測用電極。   The electrode for electroencephalogram measurement according to claim 1, wherein the cylindrical portion has a shape including one or more of a comb shape, a cylindrical shape, a barrel shape, a quadrangular column shape, and a polygonal column shape. 請求項1又は2記載の脳波計測用電極を備えることを特徴とする脳波計測用頭部装着装置。   An electroencephalogram measurement head-mounted device comprising the electroencephalogram measurement electrode according to claim 1. 繊維素材の塊を導電性ジェルに浸して、該導電性ジェルが保持された又は浸み込んだ前記繊維素材の塊からなる第1の電極を、筒状の開口部内壁を有する第2の電極の前記内壁で接触保持させることを特徴とする脳波計測用電極の作製方法。

A second electrode having a cylindrical opening inner wall is formed by immersing a lump of fiber material in a conductive gel, and the first electrode made of the lump of fiber material in which the conductive gel is held or soaked. A method for producing an electroencephalogram measurement electrode, wherein the electrode is held in contact with the inner wall.

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