JP4610131B2

JP4610131B2 - Electrical stimulator

Info

Publication number: JP4610131B2
Application number: JP2001200486A
Authority: JP
Inventors: 栗栖信之
Original assignee: Minato Medical Science Co Ltd
Current assignee: Minato Medical Science Co Ltd
Priority date: 2001-07-02
Filing date: 2001-07-02
Publication date: 2011-01-12
Anticipated expiration: 2021-07-02
Also published as: JP2003010344A

Description

【０００１】
【産業上の利用分野】
本発明は、搬送波の振幅を低い周波数で変化させて、つまり干渉低周波で生体を刺激する電気刺激装置に関するもので、従来よりも刺激強度の強い装置を提供することを目的とする。
【０００２】
【従来の技術】
現在使用されている電気刺激装置は、大別して、パスルを用いたものと、正弦波の搬送波を用いたものとがある。電気刺激信号の周波数が高くなるほど、皮膚の電気的インピーダンスは低くなり、不快な刺激感が少なくなるので、多くのエネルギーを供給できる。
このような性質を利用し、多くの電気エネルギーを供給したい場合は周波数の高い搬送波を用いる。しかし、周波数が高いと筋肉が収縮しにくいので、十分な筋収縮をおこさせたい場合は、搬送波の振幅を低い周波数で変化させて、つまり干渉低周波を使用している。
【０００３】
生体内で搬送波の振幅を変化させるには、装置内で搬送波を振幅変調（内部干渉）して出力する方法と、位相又は周波数が異なる複数の搬送波を生体に供給し、生体内で発生する干渉波（干渉低周波）で生体を刺激する方法がある。両者を組み合わせたものもある。
このように、方法によって装置の出力波形は異なるが、生体内の刺激波形は、搬送波の振幅を低い周波数で変化させるという点で共通している。本発明はこれらすべてを含む。
搬送波を用いた装置には、周波数が２５００Ｈｚ程度の正弦波を装置内で振幅変調して生体に供給する内部干渉低周波型の筋肉増強用電気刺激装置や、周波数が僅かに異なる複数の搬送波を同時に生体に供給し、生体内に生じる干渉低周波で刺激をおこなう干渉低周波治療器（現在は２５００〜５０００Ｈｚ程度の搬送波を使用）、周波数が１１０００Ｈｚ程度の三相交流電気刺激装置などがある。
【０００４】
このような刺激波形例を図3に示す。図3（Ａ）は干渉低周波治療器の干渉波形の例である。干渉低周波治療器は、周波数が僅かに異なる２つの搬送波を同時に生体の供給し、このとき体内で生じる干渉波で生体を刺激するものである。前述のように、位相を制御しても同じ干渉低周波が得られる。例えば、４０００Ｈｚと４１００Ｈｚの搬送波を用いると、周波数が１００Ｈｚの干渉波が発生する。現在の干渉低周波治療器では、搬送波の周波数は、４０００Ｈｚの他、２５００Ｈｚと５０００Ｈｚ等が、また、干渉波の周波数は、０〜２００Ｈｚ程度のものが、それぞれ多く使用されている。従来は２つの搬送波を用いていたが、最近、３つの搬送波を用いるものもある。
【０００５】
図3（Ｂ）は筋力増強用刺激装置の刺激波形の例である。これは周波数が２５００Ｈｚ程度の搬送波を振幅変調して断続波にしたものである。これは、装置内部で搬送波を振幅変調して内部干渉低周波を製作した後、生体に供給するものである。
図3（Ｃ）は三相電流刺激装置の出力を、説明のために単純に表示したもので、１１０００Ｈｚ程度の搬送波を低周波で振幅変調したものである。実際には、３つの搬送波の位相を変えて生体に供給し、生体刺激をおこなうようにしている。この周波数では筋肉の賦活作用が高いとされている。干渉低周波治療器と三相電流刺激装置では、装置内部で搬送波を振幅変調した後、生体に供給する方法もある。
【０００６】
以上に述べたように、これらのタイプの電気刺激装置では、搬送波の周波数は１０００〜１１０００Ｈｚ程度のものが用いられている。搬送波の周波数によって、皮膚表面の電気刺激感覚と筋収縮に伴う刺激強度が異なる。また、生体は電気的特性の異なる組織が層を成しているので、生体の深さ方向にインピーダンスの異なる電気容量成分が分布している。このため、周波数が高くなるほど電流は深部まで到達する。さらに、２５００Ｈｚ近傍は筋力増強に、４０００Ｈｚ近傍は疼痛緩和に、１１０００Ｈｚ近傍は筋肉の賦活に使用されることが多い。つまり、周波数によって、治療効果が異なるとされている。振幅は、０〜２００Ｈｚ程度で変化させることが多い。筋肉の収縮と弛緩を生じさせるためには数十Ｈｚ以下の低い周波数が使用されることが多い。
【０００７】
電気刺激装置では、電極と、装置の出力部と電極を結ぶリード線等を一体にしており、これを導子と呼んでいる。導子には、普通導子、粘着導子、吸着導子等が使用されている。普通導子は、含水させた布等で電極を覆ったもので、これを所定の位置に置き、ベルト等で身体に巻き付けて装着する。粘着導子は、電極に粘着性のゲルを付けたもので、これを患部に粘着させて使用する。吸着導子は、電極をカバーで覆い、カバー内部の空気をポンプで吸引するようにしたもので、導子カバーを体表面に接した後、ポンプでカバー内の空気を吸引して吸着させるものである。
【０００８】
【発明が解決しようとする課題】
前述のように、従来の干渉低周波型、又は、内部干渉低周波型の電気刺激装置では、生体内における干渉低周波の振幅の変化によって刺激強度を得ており、これ以外に刺激強度を変化させることはできなかった。本発明の目的は、搬送波の振幅変化による刺激の他に、搬送波の周波数変調による刺激を組み合わせ、従来よりも強い刺激効果を得ることにある。
【０００９】
【課題を解決するための手段】
そこで、請求項１記載の発明では、
搬送波を発生する搬送波発生部と、
前記搬送波発生部で発生した搬送波を所定の大きさに増幅する増幅部と、
前記増幅部の出力を生体に供給する導子
を有する出力系統を複数個有し、
前記複数の出力系統の搬送波を同時に生体に供給し、そのとき生体内で発生する干渉低周波により生体を刺激する干渉低周波型の電気刺激装置において、
搬送波周波数変調信号発生部を設け、
前記搬送波発生部で発生した複数の搬送波を前記搬送波周波数変調信号発生部に入力し、前記搬送波周波数変調信号発生部に入力した複数の搬送波を加算して干渉低周波を作成し、前記作成した干渉低周波を波形成形して、搬送波周波数変調信号を作成し、
前記搬送波周波数変調信号を前記搬送波発生部の発振周波数制御端子に入力して、前記搬送波発生部で発生する搬送波を周波数変調し、
生体内で発生する干渉低周波の振幅の変化と同期して搬送波の周波数を変化させるようにした。
【００１０】
また、請求項２記載の発明では、
搬送波を発生する搬送波発生部と、
前記搬送波発生部で発生した搬送波の振幅を低周波信号で変調する振幅変調部と、
低周波振幅変調信号を発生して前記振幅変調部を制御する振幅変調信号発生部と、
前記振幅変調部で振幅変調した搬送波を所定の大きさに増幅する増幅部と、
前記増幅部の出力を生体に供給する導子
を有し、搬送波を低周波で振幅変調して装置内部で内部干渉低周波を発生して、前記内部干渉低周波を生体に供給して生体を刺激する内部干渉低周波型の電気刺激装置において、
搬送波周波数変調信号発生部を設け、
前記振幅変調信号発生部が発生する低周波振幅変調信号を前記搬送波周波数変調信号発生部に入力して波形整形して搬送波周波数変調信号を作成し、
前記搬送波周波数変調信号を前記搬送波発生部の発振周波数制御端子に入力して、前記搬送波発生部で発生する搬送波を周波数変調し、
前記搬送波の振幅の変化と同期して搬送波の周波数を変化させるようにした。
【００１１】
【作用】
請求項1記載の発明により、
複数の搬送波を同時に生体に供給し、生体内で発生する干渉低周波により生体を刺激する干渉低周波型の電気刺激装置において、搬送波周波数変調信号発生部を設け、この搬送波周波数変調信号発生部に前記複数の搬送波を入力し加算して干渉低周波を作成し、前記作成した干渉低周波を波形整形して搬送波周波数変調信号を作成し、前記搬送波周波数変調信号を前記搬送波発生部の発振周波数制御端子に入力して前記搬送波発生部で発生する搬送波を周波数変調する。
このため、体内で発生する干渉低周波の搬送波の振幅の変化に正確に同期させて、搬送波を確実に周波数変調することができ、干渉低周波の振幅の変化と周波数の変化の両方によって生体を刺激することができる。干渉低周波の振幅が最大のとき搬送波の周波数を最低にすることができるので、干渉低周波の振幅と周波数の両方の効果を相乗的に得ることができ、従来よりも強い筋収縮と刺激感を得ることができる。
また、干渉低周波を波形整形して搬送波周波数変調信号を作成するので、図1（C）に示すように、様々な周期の、さまざまな波形の変調信号を生成できるため、多様な刺激効果と刺激感を得ることができる。
【００１２】
請求項2記載の発明により、内部干渉低周波型の電気刺激装置において、
搬送波周波数変調信号発生部25を設け、振幅変調信号発生部Ａｍが発生する低周波振幅変調信号で搬送波の振幅変調をおこなうとともに、前記低周波振幅変調信号を搬送波周波数変調信号発生部25に入力して波形整形し、この波形整形した信号を搬送波変調信号として搬送波発生部21の発振周波数制御端子に入力し、搬送波発生部で発生する搬送波を周波数変調し、振幅の変化と周波数の変化の両方によって生体を刺激する。干渉低周波の振幅が最大のとき搬送波の周波数を最低にすることができるので、干渉低周波の振幅と周波数の両方の効果を相乗的に得ることができ従来よりも強い筋収縮と刺激感を得ることができる。
また、干渉低周波を波形整形して搬送波周波数変調信号を作成するので、図1（C）と同様に、様々な周期の、さまざまな波形の変調信号を生成できるため、多様な刺激効果と刺激感を得ることができる。
【００１３】
【実施例】
請求項1記載の発明は、
搬送波を発生する搬送波発生部と、
前記搬送波発生部で発生した搬送波を所定の大きさに増幅する増幅部と、
前記増幅部の出力を生体に供給する導子
を有する出力系統を複数個有し、
前記複数の出力系統の搬送波を同時に生体に供給し、そのとき生体内で発生する干渉低周波により生体を刺激する干渉低周波型の電気刺激装置において、
搬送波周波数変調信号発生部を設け、
前記搬送波発生部で発生した複数の搬送波を前記搬送波周波数変調信号発生部に入力し、前記搬送波周波数変調信号発生部に入力した複数の搬送波を加算して干渉低周波を作成し、前記作成した干渉低周波を波形成形して、搬送波周波数変調信号を作成し、
前記搬送波周波数変調信号を前記搬送波発生部の発振周波数制御端子に入力して、前記搬送波発生部で発生する搬送波を周波数変調し、
生体内で発生する干渉低周波の振幅の変化と同期して搬送波の周波数を変化させるようにしたことを特徴とする、干渉低周波型の電気刺激装置である。
【００１４】
請求項1記載の発明の実施例を図1に示す。図1（Ａ）は本請求項記載の発明のブロック図で、１と２は搬送波発生部、３と４は発生した搬送波を所定の値に増幅する増幅部、Ｄ１、Ｄ１’、Ｄ２、Ｄ２’は本体で発生させた刺激波を生体に供給する導子、５は２つの搬送波から干渉波を作成し、この干渉波と同期した変調信号を発生する搬送波周波数変調信号発生部である。
搬送波発生部１と２から搬送波（中周波領域の正弦波）を発生する。２つの搬送波の周波数は干渉波の周波数だけ異なるように制御される。このため、２つの搬送波を生体に供給すると、生体内で干渉波を発生できる。
【００１５】
搬送波周波数変調信号発生部５の構成例を図1（Ｂ）に示す。図の３３は加算器であり、２つの搬送波を入力して加算し、図1（Ｄ）のａに示すような、生体内で発生するものと同じ干渉低周波を合成する。図1（Ｂ）の３１は変調信号成形部であり、加算器３３で合成した干渉低周波を元に変調信号を作成する。３２は変調度調節部で、変調信号の振幅を調節し、搬送波の周波数変調の変調度を調節する。変調信号は図1（Ｃ）のように、干渉波の位相と振幅をもとに、これと同期した任意の波形を作ることができる。ｐは２つの干渉波の山を１周期とし、その振幅をそのまま利用する方法である。ｑは干渉波の１山を１周期としてとる方法、ｒは振幅が一定値以上になった時矩形波を出力する方法である。どのような変調信号を作るかは目的に応じて決定すればよい。
【００１６】
図1（Ｄ）の、ａは搬送波の出力を加算して得られた干渉波、ｂは干渉波の抱絡線から得た変調信号、ｃは変調信号ｂの振幅を変調度調節部32で調整した調整変調信号、oは本請求項記載の発明で得られた周波数変調した干渉低周波電流の波形、ｋはこの干渉低周波電流で得られる筋収縮（刺激）強度の程度をそれぞれ示す。
ｂの変調信号は、図1（Ｃ）のｐのようにして得た信号を採用している。このようにして得られた周波数変調した干渉低周波の波形は、図1（Ｄ）のoに示すように、干渉波形と同期して、干渉波の１山ごとに搬送波の周波数が蜜の部分と疎の部分が現れる。この波形による筋収縮の強さは、干渉波の振幅と、周波数変調の疎密によるものとの和になり、図1（Ｄ）のｋに示すように、搬送波の周波数が密なｄとｇ領域では通常の干渉波よりも弱く、e領域では通常の干渉波よりも強くなる。この結果、図1（Ｄ）のように周波数変調をした干渉波では、１山毎に、通常の干渉波よりも強い刺激と弱い刺激が交互の出現し、従来よりもメリハリの効いた、強い刺激を得ることができる。
図1（Ｂ）の３２は変調度調節部で、変調信号の振幅を調節し、搬送波の周波数変調の変調度を調節する。この変調度調節部を調節すると、変調の深さを調節することが出来る。変調度調節部３２による減衰を少なくすると、周波数変調度が深くなり、刺激強度のメリハリがより明確になり、筋刺激強度も強くなる。
【００１７】
請求項２記載の発明は、
搬送波を発生する搬送波発生部と、
前記搬送波発生部で発生した搬送波の振幅を低周波信号で変調する振幅変調部と、
低周波振幅変調信号を発生して前記振幅変調部を制御する振幅変調信号発生部と、
前記振幅変調部で振幅変調した搬送波を所定の大きさに増幅する増幅部と、
前記増幅部の出力を生体に供給する導子
を有し、搬送波を低周波で振幅変調して装置内部で内部干渉低周波を発生して、前記内部干渉低周波を生体に供給して生体を刺激する内部干渉低周波型の電気刺激装置において、
搬送波周波数変調信号発生部を設け、
前記振幅変調信号発生部が発生する低周波振幅変調信号を前記搬送波周波数変調信号発生部に入力して波形整形して搬送波周波数変調信号を作成し、
前記搬送波周波数変調信号を前記搬送波発生部の発振周波数制御端子に入力して、前記搬送波発生部で発生する搬送波を周波数変調し、
前記搬送波の振幅の変化と同期して搬送波の周波数を変化させるようにしたことを特徴とする、内部干渉低周波型の電気刺激装置である。
【００１８】
図2に請求項2記載の発明の実施例を示す。図2（Ａ）は装置のブロック図であり、21は搬送波を発生する搬送波発生部、Ｍは振幅変調部、23は出力を所定の値に増幅する増幅部、Amは搬送波を振幅変調するための振幅変調信号を発生する振幅変調信号発生部、Ｄ21とＤ21’は導子、25は搬送波の周波数を変調する搬送波周波数変調信号発生部である。
【００１９】
搬送波発生部21は搬送波を発生するが、その発振周波数制御端子を制御することで、発生する搬送波の周波数を変化させることができる。振幅変調波発生部Ａｍも発振周波数が可変で、所定の振幅変調波を発生する。搬送波と振幅変調波を振幅変調部Ｍに入力すると、搬送波が振幅変調される。
請求項2記載の発明によると、振幅変調波発生部Ａｍが発生する振幅変調波は、振幅変調部Mとともに、搬送波周波数変調信号発生部25に入力され、波形整形され、振幅変調信号と同期した周波数変調信号を作成し、これを搬送波発生部21の発振周波数制御端子に入力して、搬送波の発振周波数を、振幅変調信号と同期させて、周波数変調し、さらに振幅変調部Mで振幅変調され、増幅部23で所定値に増幅され、導子を介して、生体に供給される。
【００２０】
搬送波周波数変調信号発生部25で発生する周波数変調信号は、目的に応じて波形整形をおこなうことができる。
図2（B)は、内部干渉低周波の振幅変化と同期させて周波数を変調した例である。
図2（C）は、干渉波の1周期出力し、その次の1周期は出力がゼロになるように振幅変調し、この振幅変調信号で搬送波発生部の搬送波を周波数変調したものである。この周波数変調信号の周波数は、は図1（D）のように、干渉波の2周期分の周期を持つ。
図2（Ｄ）は三相交流電気刺激装置の刺激波形を、振幅の変化に同期させて、周波数変調した例である。
【００２１】
ここでは、実際の振幅変調信号を検出してこれを波形整形し、周波数変調波形を作成し、
搬送波を周波数変調する例を述べたが、波形整形をどのようにするかは問わない。
【００２２】
図2（Ｂ）から（Ｄ）には、振幅が最大の時、搬送波の周波数が少なくなるようにした例を示している。振幅が大きいほど刺激は強くなり、筋肉は強く収縮する。また、搬送波の周波数が低くなるほど、刺激は強くなる。このため、振幅が最大の時、搬送波の周波数が最小になるように同期させると、振幅による刺激よりも強い刺激が得られる。
【００２３】
【発明の効果】
請求項1及び２記載の発明により、生体内で、搬送波（干渉低周波）の振幅の変化に同期させて、周波数変調をおこなうことができる。このため、搬送波の振幅の変化による刺激強度と、周波数変調によるものとを相乗的に得ることができ、同じエネルギーでも、従来よりも強い刺激を効率的に発生することができる。また、搬送波を周波数変調して出力するので、１つの搬送波だけで筋肉を刺激できる。
【００２４】
【図面の簡単な説明】
【図１】請求項1記載の発明の実施例であり、（Ａ）は回路構成例、（Ｂ）は搬送波周波数変調信号発生部の回路構成例、（Ｃ）は搬送波周波数変調信号発生部で作成した干渉低周波から搬送波周波数変調信号を発生する３つの例、（Ｄ）のaは搬送波周波数変調信号発生部で作成される干渉低周波、ｂはaの干渉低周波から得た搬送波周波数変調信号、ｃはｂの搬送波周波数変調信号を変調度調節した信号、oは生体内で発生する干渉低周波、ｋは筋肉刺激強度の図である。
【図２】請求項2記載の発明の実施例であり、（Ａ）は回路構成例、（Ｂ）〜（Ｄ）はそれぞれ内部干渉低周波治療器、筋力増強用刺激装置、三相電流刺激装置の刺激波形の例である。
【図３】従来の、（Ａ）内部干渉低周波治療器の干渉波形の例、（Ｂ）は筋力増強用刺激装置の刺激波形例、（Ｃ）は三相電流刺激装置の刺激波形例である。
【符号の説明】
１、２・・・・搬送波発生部３、４・・・増幅部
５・・・・・・搬送波周波数変調信号発生部
Ｄ１、Ｄ１’、Ｄ２、Ｄ２’ ・・導子
ｆ１、ｆ２・・搬送波の周波数
３１・・・・変調信号成形部
３２・・・・・変調度調節部
３３・・・・加算器
２１・・・・・搬送波発生部２３・・・・増幅部
２５・・・・・搬送波周波数変調信号発生部
Ｍ・・・・・振幅変調部
Ａｍ・・・・・振幅変調信号発生部Ｄ２１、Ｄ２１’・・導子[0001]
[Industrial application fields]
The present invention, by changing the amplitude of the carrier at a lower frequency, i.e. relates electrostimulation device for stimulating biological interference low frequencies, and to provide a strong picolinimidate location stimulus intensity than before.
[0002]
[Prior art]
The electrical stimulation devices currently used are roughly classified into those using a pulse and those using a sine wave carrier. The higher the frequency of the electrical stimulus signal, the lower the electrical impedance of the skin and the less unpleasant irritation, so more energy can be supplied.
In order to supply a large amount of electric energy using such a property, a carrier wave having a high frequency is used. However, when the frequency is high, the muscle does not easily contract. Therefore, when sufficient muscle contraction is desired, the amplitude of the carrier wave is changed at a low frequency, that is, the interference low frequency is used.
[0003]
In order to change the amplitude of a carrier wave in a living body, a method of outputting the carrier wave by amplitude modulation (internal interference) in the apparatus and a plurality of carrier waves having different phases or frequencies are supplied to the living body, and interference generated in the living body. There is a method of stimulating a living body with a wave (interference low frequency). There is also a combination of both.
Thus, although the output waveform of the apparatus differs depending on the method, the stimulation waveform in the living body is common in that the amplitude of the carrier wave is changed at a low frequency. The present invention includes all of these.
For devices using a carrier wave, an internal interference low frequency muscle stimulation electrical stimulation device that modulates the amplitude of a sine wave with a frequency of about 2500 Hz in the device and supplies it to a living body, or a plurality of carrier waves having slightly different frequencies. There are an interference low frequency treatment device (currently using a carrier wave of about 2500 to 5000 Hz), a three-phase AC electrical stimulation device having a frequency of about 11000 Hz, etc.
[0004]
It shows such stimulus waveform example in FIG. 3 (A) is an example of an interference wave interfering low-frequency electric therapy apparatus. The interference low-frequency treatment device supplies two carrier waves having slightly different frequencies to the living body at the same time, and stimulates the living body with an interference wave generated in the body. As described above, the same interference low frequency can be obtained even if the phase is controlled. For example, if a carrier wave of 4000 Hz and 4100 Hz is used, an interference wave having a frequency of 100 Hz is generated. In the current interference low-frequency treatment device, the frequency of the carrier wave is 4000 Hz, 2500 Hz, 5000 Hz, and the like, and the frequency of the interference wave is about 0 to 200 Hz. Conventionally, two carrier waves have been used, but recently, there are also ones that use three carrier waves.
[0005]
FIG. 3 (B) is an example of a stimulus waveform muscle strengthening stimulator for. This is an intermittent wave obtained by amplitude-modulating a carrier wave having a frequency of about 2500 Hz. In this method, a carrier wave is amplitude-modulated inside the apparatus to produce a low internal interference frequency, and then supplied to a living body.
The output of FIG. 3 (C) the three-phase current stimulator, which was simply displayed for explanation, has been amplitude modulated at a low frequency carrier wave of about 11000Hz. In practice, the three carrier waves are changed in phase and supplied to the living body to stimulate the living body. This frequency is considered to have a high muscle activation effect. In the interference low-frequency treatment device and the three-phase current stimulating device, there is a method in which the carrier wave is amplitude-modulated inside the device and then supplied to the living body.
[0006]
As described above, in these types of electrical stimulation apparatuses, a carrier wave having a frequency of about 1000 to 11000 Hz is used. Depending on the frequency of the carrier wave, the electrical stimulation sensation on the skin surface and the stimulation intensity associated with muscle contraction are different. In addition, since the living body is composed of tissues having different electrical characteristics, capacitance components having different impedances are distributed in the depth direction of the living body. For this reason, the current reaches deeper as the frequency becomes higher. Further, the vicinity of 2500 Hz is often used for muscle strength enhancement, the vicinity of 4000 Hz for pain relief, and the vicinity of 11000 Hz is often used for muscle activation. In other words, it is said that the therapeutic effect varies depending on the frequency. The amplitude is often changed at about 0 to 200 Hz. A low frequency of tens of Hz or less is often used to cause muscle contraction and relaxation.
[0007]
In an electrical stimulation device, an electrode and a lead wire connecting the output portion of the device and the electrode are integrated, and this is called a conductor. As the conductor, a normal conductor, an adhesive conductor, an adsorption conductor or the like is used. An ordinary conductor is an electrode covered with a water-containing cloth or the like. The electrode is placed at a predetermined position, and is wound around the body with a belt or the like. The adhesive conductor is made by attaching an adhesive gel to an electrode and sticking it to an affected area. The adsorption conductor is a cover that covers the electrode with a cover and sucks the air inside the cover with a pump. After the conductor cover is in contact with the body surface, the air inside the cover is sucked and absorbed by the pump. It is.
[0008]
[Problems to be solved by the invention]
As described above, in the conventional interference low frequency type or internal interference low frequency type electric stimulation device, the stimulation intensity is obtained by changing the amplitude of the interference low frequency in the living body, and the stimulation intensity is changed in addition to this. I couldn't make it. The purpose of the present invention, in addition to stimulation by the amplitude change of the carrier, combined stimulation by frequency modulation of the carrier is to obtain a stronger stimulating effect than the prior art.
[0009]
[Means for Solving the Problems]
Therefore , in the invention according to claim 1,
A carrier generation unit for generating a carrier;
An amplifying section for amplifying the carrier wave generated in the carrier wave generating unit into a predetermined size,
A plurality of output systems having a conductor for supplying the output of the amplification unit to the living body,
In the interference low frequency type electrical stimulation apparatus for simultaneously supplying the carrier waves of the plurality of output systems to the living body and stimulating the living body by the interference low frequency generated in the living body at that time,
A carrier frequency modulation signal generator is provided,
Interference the multiple carriers generated in the carrier wave generating unit inputted to the carrier frequency modulation signal generator, wherein to create a carrier frequency multiple interference low frequency by adding the carrier wave input to the modulation signal generator, and the generated Create a carrier frequency modulation signal by shaping the low frequency waveform,
Wherein the carrier frequency-modulated signal is input to the oscillation frequency control terminal of said carrier generator, a carrier wave generated by the carrier wave generating unit and the frequency modulation,
And to vary the frequency of the carrier wave in synchronization with the change in the amplitude of the interference low frequency generated by live body.
[0010]
In the invention according to claim 2,
A carrier generation unit for generating a carrier;
An amplitude modulation unit for modulating the amplitude of the carrier wave generated by the carrier wave generation unit with a low-frequency signal;
An amplitude modulation signal generating section for controlling the amplitude modulation section generates a low-frequency amplitude modulation signal,
An amplifying section for amplifying the carrier wave amplitude-modulated to a predetermined size by the amplitude modulation section,
It has Shirubeko supplying an output of the amplification unit in a living body, and generating an internal interference low frequency within the apparatus by amplitude modulating a carrier wave at a low frequency, biological and supplies the internal interference low frequency biological In the internal interference low frequency type electrical stimulation device to stimulate,
A carrier frequency modulation signal generator is provided,
The create a carrier wave frequency-modulated signal a low-frequency amplitude modulation signal amplitude modulation signal generator is generated by and input waveform shaping to the carrier frequency modulation signal generator,
Wherein the carrier frequency-modulated signal is input to the oscillation frequency control terminal of said carrier generator, a carrier wave generated by the carrier wave generating unit and the frequency modulation,
Was so that by changing the frequency of the carrier wave in synchronization with the change in the amplitude of the carrier wave.
[0011]
[Action]
According to the invention of claim 1,
A carrier frequency modulation signal generator is provided in an interference low frequency type electrical stimulation device that simultaneously supplies a plurality of carrier waves to a living body and stimulates the living body by interference low frequency generated in the living body. The plurality of carrier waves are input and added to create an interference low frequency, the generated interference low frequency is wave-shaped to create a carrier frequency modulation signal, and the carrier frequency modulation signal is controlled to an oscillation frequency of the carrier wave generation unit The carrier wave generated by the carrier wave generator is input to the terminal and frequency-modulated.
Therefore, exactly synchronized with a change in the amplitude of the interference low frequency carrier wave generated in the body, Ki de be reliably frequency modulating a carrier wave, the amplitude of the interference Wataruhiku frequency changes and frequency changes Ru can stimulate vivo by both. Interference because the low-frequency amplitude can be the lowest frequency of the maximum of the time carrier, interference low frequency amplitude and frequency effects of both can be obtained synergistically, strong muscle contraction and irritation than conventional Can be obtained.
In addition, as the carrier frequency modulation signal is created by shaping the low frequency interference, as shown in Fig. 1 (C), modulation signals with various waveforms with various periods can be generated. A feeling of irritation can be obtained.
[0012]
According to the invention of claim 2, in the internal interference low frequency type electrical stimulation device,
The provided carrier frequency modulated signal generating section 25, performs amplitude modulation of the carrier in the low-frequency amplitude modulation signal amplitude modulating signal generator Am occurs, enter the low-frequency amplitude-modulated signal to the carrier frequency modulation signal generator 25 Then, the waveform shaped signal is input to the oscillation frequency control terminal of the carrier wave generation unit 21 as a carrier wave modulation signal, and the carrier wave generated by the carrier wave generation unit is frequency-modulated to change both the amplitude change and the frequency change. Stimulates the living body. Since the frequency of the carrier wave can be minimized when the amplitude of the interference low frequency is maximum, the effects of both the amplitude and frequency of the interference low frequency can be obtained synergistically, and the muscle contraction and stimulation feeling stronger than before can be obtained. Obtainable.
Since the carrier frequency modulation signal is created by shaping the interference low frequency, modulation signals of various waveforms with various periods can be generated, as in Fig. 1 (C). A feeling can be obtained.
[0013]
【Example】
The invention according to claim 1
A carrier generation unit for generating a carrier;
An amplifying section for amplifying the carrier wave generated in the carrier wave generating unit into a predetermined size,
A plurality of output systems having a conductor for supplying the output of the amplification unit to the living body,
In the interference low frequency type electrical stimulation apparatus for simultaneously supplying the carrier waves of the plurality of output systems to the living body and stimulating the living body by the interference low frequency generated in the living body at that time,
A carrier frequency modulation signal generator is provided,
Interference the multiple carriers generated in the carrier wave generating unit inputted to the carrier frequency modulation signal generator, wherein to create a carrier frequency multiple interference low frequency by adding the carrier wave input to the modulation signal generator, and the generated Create a carrier frequency modulation signal by shaping the low frequency waveform,
Wherein the carrier frequency-modulated signal is input to the oscillation frequency control terminal of said carrier generator, a carrier wave generated by the carrier wave generating unit and the frequency modulation,
In synchronization with the change in the amplitude of the interference low frequency generated by the raw body, characterized in that so as to vary the frequency of the carrier wave, an interference low frequency electro-stimulator.
[0014]
An embodiment of the invention described in claim 1 is shown in FIG. FIG. 1A is a block diagram of the present invention, wherein 1 and 2 are carrier generation units, 3 and 4 are amplification units that amplify the generated carrier to a predetermined value, D1, D1 ′, D2, and D2. 'Is a conductor that supplies the living body with the stimulation wave generated by the main body, and 5 is a carrier frequency modulation signal generation unit that generates an interference wave from two carrier waves and generates a modulation signal synchronized with the interference wave .
A carrier wave (a sine wave in the middle frequency range) is generated from the carrier wave generators 1 and 2. The frequencies of the two carrier waves are controlled so as to differ by the frequency of the interference wave. For this reason, when two carrier waves are supplied to a living body, an interference wave can be generated in the living body .
[0015]
A configuration example of the carrier frequency modulation signal generator 5 is shown in FIG. Reference numeral 33 denotes an adder, which inputs and adds two carrier waves, and synthesizes the same interference low frequency as that generated in the living body as indicated by a in FIG. Reference numeral 31 in FIG. 1B denotes a modulation signal shaping unit , which creates a modulation signal based on the interference low frequency synthesized by the adder 33. A modulation degree adjusting unit 32 adjusts the amplitude of the modulation signal and adjusts the modulation degree of the frequency modulation of the carrier wave. As shown in FIG. 1C, the modulation signal can be formed in an arbitrary waveform synchronized with the phase and amplitude of the interference wave. p is a method in which the peak of two interference waves is defined as one period and the amplitude is used as it is. q is a method of taking one peak of the interference wave as one cycle, and r is a method of outputting a rectangular wave when the amplitude becomes a certain value or more. What modulation signal is to be generated may be determined according to the purpose.
[0016]
In FIG. 1D, a is an interference wave obtained by adding the outputs of the carrier waves, b is a modulation signal obtained from the interference wave interference line, c is an amplitude of the modulation signal b by the modulation degree adjustment unit 32. The adjusted adjustment modulation signal, o is the waveform of the frequency-modulated interference low-frequency current obtained in the present invention, and k is the degree of muscle contraction (stimulation) intensity obtained by this interference low-frequency current.
As the modulation signal b, a signal obtained as shown by p in FIG. The frequency-modulated interference low-frequency waveform obtained in this way is a portion where the frequency of the carrier wave is honey for each peak of the interference wave in synchronization with the interference waveform, as indicated by o in FIG. The sparse part appears. The strength of the muscle contraction due to this waveform is the sum of the amplitude of the interference wave and the density modulation, and as shown by k in FIG. Is weaker than normal interference waves, and stronger than normal interference waves in the e region. As a result, in the interference wave that has been frequency-modulated as shown in FIG. 1 (D), a strong stimulus and a weak stimulus appear alternately for each mountain, and a stronger and stronger effect than before. I can get a stimulus.
Reference numeral 32 in FIG. 1B denotes a modulation degree adjusting unit that adjusts the amplitude of the modulation signal and adjusts the modulation degree of the frequency modulation of the carrier wave. By adjusting this modulation degree adjusting section, the depth of modulation can be adjusted. If the attenuation by the modulation degree adjusting unit 32 is reduced, the frequency modulation degree becomes deeper, the stimulation intensity becomes clearer, and the muscle stimulation intensity becomes stronger.
[0017]
The invention according to claim 2
A carrier generation unit for generating a carrier;
An amplitude modulation unit for modulating the amplitude of the carrier wave generated by the carrier wave generation unit with a low-frequency signal;
An amplitude modulation signal generating section for controlling the amplitude modulation section generates a low-frequency amplitude modulation signal,
An amplifying section for amplifying the carrier wave amplitude-modulated to a predetermined size by the amplitude modulation section,
It has Shirubeko supplying an output of the amplification unit in a living body, and generating an internal interference low frequency within the apparatus by amplitude modulating a carrier wave at a low frequency, biological and supplies the internal interference low frequency biological In the internal interference low frequency type electrical stimulation device to stimulate,
A carrier frequency modulation signal generator is provided,
The create a carrier wave frequency-modulated signal a low-frequency amplitude modulation signal amplitude modulation signal generator is generated by and input waveform shaping to the carrier frequency modulation signal generator,
Wherein the carrier frequency-modulated signal is input to the oscillation frequency control terminal of said carrier generator, a carrier wave generated by the carrier wave generating unit and the frequency modulation,
Characterized in that in synchronization with the change in the amplitude of the carrier wave was so that by changing the frequency of the carrier wave, the internal interference low frequency electro-stimulator.
[0018]
FIG. 2 shows an embodiment of the invention described in claim 2. FIG. 2A is a block diagram of the apparatus, 21 is a carrier wave generating unit for generating a carrier wave, M is an amplitude modulating unit, 23 is an amplifying unit for amplifying the output to a predetermined value, and Am is for amplitude modulating the carrier wave. An amplitude modulation signal generator for generating the amplitude modulation signal, D21 and D21 ′ are conductors, and 25 is a carrier frequency modulation signal generator for modulating the frequency of the carrier wave .
[0019]
The carrier wave generation unit 21 generates a carrier wave, and the frequency of the generated carrier wave can be changed by controlling the oscillation frequency control terminal. The amplitude modulation wave generator Am also has a variable oscillation frequency and generates a predetermined amplitude modulation wave. When the carrier wave and the amplitude-modulated wave are input to the amplitude modulation unit M, the carrier wave is amplitude-modulated.
According to the second aspect of the invention, the amplitude modulation wave generated by the amplitude modulation wave generator Am is input to the carrier frequency modulation signal generation unit 25 together with the amplitude modulation unit M, and the waveform is shaped and synchronized with the amplitude modulation signal. Create a frequency modulation signal, input it to the oscillation frequency control terminal of the carrier wave generation unit 21 , synchronize the oscillation frequency of the carrier wave with the amplitude modulation signal, perform frequency modulation , and further amplitude-modulate by the amplitude modulation unit M Then, it is amplified to a predetermined value by the amplifying unit 23 and supplied to the living body through the conductor.
[0020]
The frequency modulation signal generated by the carrier frequency modulation signal generation unit 25 can be shaped according to the purpose.
FIG. 2 (B) is an example in which the frequency is modulated in synchronization with the amplitude change of the internal interference low frequency.
FIG. 2 (C) shows the output of one cycle of the interference wave, amplitude modulation so that the output of the next cycle becomes zero, and the carrier wave of the carrier wave generation unit is frequency-modulated with this amplitude modulation signal. The frequency of this frequency modulation signal has a period of two interference waves as shown in FIG. 1 (D).
Figure 2 (D) is a stimulus waveform of the three-phase AC electrical stimulator, in synchronization with the change in amplitude, it is an example of frequency modulation.
[0021]
Here, the actual amplitude modulation signal is detected and waveform-shaped to create a frequency modulation waveform.
Although an example in which a carrier wave is frequency-modulated has been described, it does not matter how the waveform is shaped.
[0022]
FIGS. 2B to 2D show examples in which the frequency of the carrier wave is reduced when the amplitude is maximum. The greater the amplitude, the stronger the stimulus and the stronger the muscles contract. Also, the lower the carrier frequency, the stronger the stimulus. For this reason, when the amplitude is maximized, if the synchronization is performed so that the frequency of the carrier wave is minimized, a stimulus stronger than the stimulus by the amplitude can be obtained.
[0023]
【The invention's effect】
The invention of claim 1 and 2 wherein, in vivo, in synchronization with the change in amplitude of the carrier wave (interference low frequency), it is possible to perform frequency modulation. For this reason, it is possible to synergistically obtain the stimulation intensity due to the change in the amplitude of the carrier wave and that due to the frequency modulation, and even with the same energy, it is possible to efficiently generate a stronger stimulation than before. Further, since the carrier wave is frequency-modulated and output, muscles can be stimulated with only one carrier wave .
[0024]
[Brief description of the drawings]
[1] is an embodiment of the invention described in claim 1, (A) is an example circuit configuration, (B) is a circuit configuration example of a carrier frequency-modulated signal generating unit, (C) at a carrier frequency modulated signal generating section Three examples of generating a carrier frequency modulation signal from the generated interference low frequency, (a) in (D) is the interference low frequency generated by the carrier frequency modulation signal generator, and (b) is the carrier frequency modulation obtained from the interference low frequency of a The signal, c is a signal obtained by adjusting the modulation frequency of the carrier frequency modulation signal of b, o is a low frequency of interference generated in the living body, and k is a muscle stimulation intensity diagram.
FIG. 2 is an embodiment of the invention as claimed in claim 2, wherein (A) is a circuit configuration example, (B) to (D) are internal interference low-frequency treatment devices, muscle strength enhancing stimulation devices, and three-phase current stimulations, respectively. It is an example of the stimulation waveform of an apparatus.
3A is an example of an interference waveform of a conventional internal interference low-frequency treatment device , FIG. 3B is an example of a stimulation waveform of a muscular strength enhancing stimulation device, and FIG. 3C is an example of a stimulation waveform of a three-phase current stimulation device. is there.
[Explanation of symbols]
1, 2,... Carrier generation unit 3, 4 ... Amplification unit 5 ... Carrier frequency modulation signal generation unit D1, D1 ', D2, D2' ... Conductors f1, f2 Frequency modulation unit 32... Modulation degree adjustment unit 33... Adder 21 .. carrier wave generation unit 2 3.・Carrier frequency modulation signal generator M... Amplitude modulator Am... Amplitude modulation signal generator D 21 and D21 ′.

Claims

A carrier generation unit for generating a carrier;
An amplifying section for amplifying the carrier wave generated in the carrier wave generating unit into a predetermined size,
A plurality of output systems having a conductor for supplying the output of the amplification unit to the living body,
In the interference low frequency type electrical stimulation device for simultaneously supplying the carrier waves of the plurality of output systems to the living body and stimulating the living body by the interference low frequency generated in the living body at that time,
A carrier frequency modulation signal generator is provided,
Interference the multiple carriers generated in the carrier wave generating unit inputted to the carrier frequency modulation signal generator, wherein to create a carrier frequency multiple interference low frequency by adding the carrier wave input to the modulation signal generator, and the generated Create a carrier frequency modulation signal by shaping the low frequency waveform,
Wherein the carrier frequency-modulated signal is input to the oscillation frequency control terminal of said carrier generator, a carrier wave generated by the carrier wave generating unit and the frequency modulation,
In synchronization with the change in the amplitude of the interference low frequency generated by the raw body, characterized in that so as to vary the frequency of the carrier wave, interference low frequency electro-stimulator.

A carrier generation unit for generating a carrier;
An amplitude modulation unit that modulates the amplitude of the carrier wave generated by the carrier wave generation unit with a low-frequency signal;
An amplitude modulation signal generating section for controlling the amplitude modulation section generates a low-frequency amplitude modulation signal,
An amplifying section for amplifying the carrier wave amplitude-modulated to a predetermined size by the amplitude modulation section,
It has Shirubeko supplying an output of the amplification unit in a living body, and generating an internal interference low frequency within the apparatus by amplitude modulating a carrier wave at a low frequency, biological and supplies the internal interference low frequency biological In the internal interference low frequency type electrical stimulation device to stimulate,
A carrier frequency modulation signal generator is provided,
Wherein the carrier wave frequency-modulated signal a low-frequency amplitude modulation signal amplitude modulation signal generator is generated by and input waveform shaping to the carrier frequency modulation signal generator,
Wherein the carrier frequency-modulated signal is input to the oscillation frequency control terminal of said carrier generator, a carrier wave generated by the carrier wave generating unit and the frequency modulation,
Characterized in that in synchronization with the change in the amplitude of the carrier wave was so that by changing the frequency of the carrier, the internal interference low frequency electro-stimulator.