JP3561234B2 - Ultrasonic generation transmission device - Google Patents

Ultrasonic generation transmission device Download PDF

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Publication number
JP3561234B2
JP3561234B2 JP2000388742A JP2000388742A JP3561234B2 JP 3561234 B2 JP3561234 B2 JP 3561234B2 JP 2000388742 A JP2000388742 A JP 2000388742A JP 2000388742 A JP2000388742 A JP 2000388742A JP 3561234 B2 JP3561234 B2 JP 3561234B2
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binding
ultrasonic
linear members
linear
ultrasonic vibration
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JP2002186906A (en
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和成 足立
恒美 杉本
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Aisin Kiko Co Ltd
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Aisin Kiko Co Ltd
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Priority to JP2000388742A priority Critical patent/JP3561234B2/en
Priority to PCT/JP2001/011114 priority patent/WO2002049776A1/en
Priority to EP01271262A priority patent/EP1344575B1/en
Priority to US10/451,125 priority patent/US7001335B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Surgical Instruments (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、胆石、腎石等の結石の破壊、癌等の細胞破壊、超音波洗浄等に用いるのに好適な超音波発生伝達装置に関するものである。
【０００２】
【従来の技術】
この種の超音波発生伝達装置が実開昭６２−１５２７０４号公報、実公平５−４６４３０号公報に開示されている。超音波振動部で発振された超音波振動は、複数本の線状部材を束ねた伝達部を介して伝達される。単一の線状部材で構成された伝達部ではその断面積が小さく、十分に超音波振動を伝達できないという欠点がある。複数本の線状部材を束ねる構成は、伝達部の断面積を大きくして前記欠点を解消することを可能にする。
【０００３】
【発明が解決しようとする課題】
しかし、実開昭６２−１５２７０４号公報及び実公平５−４６４３０号公報のいずれの装置においても、隣り合う線状部材同士を接触させるように複数本の線状部材を束ねているため、隣り合う線状部材同士の間で擦れて熱が発生する。そのため、実開昭６２−１５２７０４号公報に開示のような発熱防止用の冷却装置が不可欠となり、超音波発生伝達装置が大きくなってしまう。超音波発生伝達装置の大型化は、人体内に挿入して使用される超音波治療器等において特に不都合である。
【０００４】
本発明は、複数本の線状部材を束ねて伝達部を構成した場合にも熱発生を抑制し得る超音波発生伝達装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
そのために本発明は、振動部からの超音波振動を伝達する伝達部を備えた超音波発生伝達装置を対象とし、請求項１の発明では、前記伝達部は、超音波振動を伝達するための複数本の線状部材と、複数本の前記線状部材を互いに離間するように束ねた結束手段と、複数本の前記線状部材及び前記結束手段の周囲を包囲する保護カバーとを備え、前記結束手段は複数本の前記線状部材を超音波振動振幅の節部の付近で結束する構成となっており、該結束手段には互いに離間するように複数の支持孔が設けられ、各支持孔に前記線状部材が挿通されて各線状部材が互いに離間され、前記保護カバーは前記結束手段によって複数本の前記線状部材から離間するように支持された。
【０００６】
束ねられた複数本の線状部材は、互いに離間しているため、超音波振動を伝達している隣合う線状部材の間での熱発生が回避される。また、線状部材は、超音波振動振幅の節部では振動しない。そのため、超音波振動振幅の節部で線状部材を結束している結束手段と線状部材との結束箇所での熱発生が抑制される。また、結束手段によって保護カバーと線状部材とを離間した構成は、線状部材と保護カバーとが接触しない範囲での伝達部の曲げ許容度を高める。また、結束手段は、複数本の前記線状部材を互いに離間するように束ねる手段として簡便である。
請求項２の発明では、請求項１の発明において、前記結束手段における前記支持孔の両開口にはテーパが設けられている。
【０００８】
請求項３の発明では、請求項１又は請求項２の発明において、前記各支持孔には前記線状部材が固定されることなく挿通されている。
【０００９】
請求項４の発明では、請求項１又は請求項２の発明において、前記線状部材と前記結束手段とは前記支持孔にて固定されている。
【００１０】
請求項５の発明では、請求項１〜請求項４のうちいずれか一項の発明において、前記結束手段の材質は、マグネシウム系金属である。
【００１２】
【発明の実施の形態】
以下、本発明を具体化した第１の実施の形態を図１〜図３に基づいて説明する。
【００１３】
図１は、超音波治療器に好適な構造の超音波発生伝達装置１０を示す。超音波発生伝達装置１０は、超音波を発生する振動部１１と、振動部１１に結合された挿入管１２とからなる。
【００１４】
振動部１１は、電気信号の供給によって発振する振動子１３と、振動子１３に連結された円錐形状のホーン１４とを備えている。振動部１１には例えばランジュバン振動子が用いられている。ホーン１４は、振動子１３で発振された超音波振動を増幅する。
【００１５】
挿入管１２は、単線形状の複数本の線状部材１５と、複数本の線状部材１５を結束する円板形状の複数の結束板１６と、複数の結束板１６の先端部に連結された作動部１７と、複数本の線状部材１５及び複数の結束板１６の周囲を包囲する保護カバー１８とからなる。断面円形状の線状部材１５は、ホーン１４で増幅された超音波振動を作動部１７に伝達する。複数本の線状部材１５を介して超音波振動を伝達された作動部１７は、患部に接触させてその切開や破砕を行なう。
【００１６】
線状部材１５は、超音波振動の伝達効率の良い、かつ曲げ易い材質を用いて作られる。線状部材１５の好適な材質は、例えばステレンス鋼、チタン合金あるいは弾性合金等である。結束板１６の材質としては、軽量かつ高強度の材質、例えばマグネシウム金属、あるいはマグネシウムを主材とする金属が用いられる。以下、これらの金属をマグネシウム系金属という。保護カバー１８は、曲げ易い弾性材、例えば合成樹脂から作られている。
【００１７】
図３に示すように、結束板１６には複数の支持孔１６１が互いに離間するように結束板１６の厚み方向に貫設されている。円形状の支持孔１６１は、円板形状の結束板１６の中心に円中心を持つ一対の円（図示略）上に配列されている。支持孔１６１は、各円上で等間隔に配列されている。図２に示すように、各支持孔１６１には線状部材１５が固定することなく単に挿通されている。なお、図示の例では前記の円の中心に線状部材１５が挿通されていないが、前記の円の中心に線状部材１５を挿通してもよい。
【００１８】
各線状部材１５の基端部は、応力的に一番小さいホーン１４の先端部に溶接によって結合されており、各線状部材１５の先端部には作動部１７が溶接によって結合されている。即ち、複数本の線状部材１５の中間部は、互いに離間するように結束板１６によって結束されており、複数本の線状部材１５の両端は、ホーン１４及び作動部１７によって互い離間するように結束されている。
【００１９】
図１に示す曲線Ｅは、振動子１３の発振によって生じる超音波振動振幅の分布曲線を表し、曲線Ｄは応力の分布曲線を表す。曲線ＥにおけるＥ１は、超音波振動振幅の節部の位置であり、曲線ＥにおけるＥ２は、超音波振動振幅の腹部の位置である。ホーン１４と線状部材１５との結合部は、超音波振動振幅の腹部Ｅ２の位置となるように設定されており、作動部１７と線状部材１５との結合部は、超音波振動振幅の腹部Ｅ２の位置となるように設定されている。即ち、振動子１３の発振時には曲線Ｅで示す定在波が線状部材１５に生じる。
【００２０】
結束板１６は、超音波振動振幅の節部Ｅ１の位置で複数本の線状部材１５を結束している。結束板１６の厚みの中心は、超音波振動振幅の節部Ｅ１の位置に一致させてある。本実施の形態では、線状部材１５の長さの範囲内における超音波振動振幅の全ての節部Ｅ１の位置に結束板１６が配設されている。保護カバー１８は、節部Ｅ１の位置で複数本の線状部材１５を互いに離間して結束する結束板１６の周面に結合されており、挿入管１２がある程度曲げられた場合にも、保護カバー１８と線状部材１５とが接触しないようになっている。
【００２１】
第１の実施の形態では以下の効果が得られる。
（１−１）結束手段である結束板１６によって束ねられた複数本の線状部材１５は、互いに離間している。そのため、超音波振動を伝達している線状部材１５同士が擦れ合うことはなく、線状部材１５同士の擦れ合いによる熱発生は生じない。このような熱発生の回避は、振動部１１からの超音波振動を伝達する伝達部となる挿入管１２を冷却するための冷却手段を不要にする。従って、冷却手段の採用による超音波発生伝達装置の大型化の問題は解消される。
【００２２】
（１−２）線状部材１５は、超音波振動振幅の節部Ｅ１では振動しない。そのため、超音波振動振幅の節部Ｅ１で線状部材１５を固定することなく結束している結束板１６と線状部材１５との間での擦れは殆ど生じない。従って、結束板１６と線状部材１５との間での擦れによる熱発生が抑制される。
【００２３】
（１−３）実公平５−４６４３０号公報の装置のように、超音波振動振幅の腹部Ｅ２で複数の線状部材１５を結束した場合、この振動する腹部という結束箇所での断面積が増加するため、この結束箇所での適正な断面積の計算（境界条件の計算）が複雑になる。このような計算の複雑化は、装置の設計を難しくする。超音波振動振幅の振動しない節部Ｅ１で複数の線状部材１５を結束する本実施の形態では、結束板１６の断面積（図２に示す断面の面積）を前記したような意味での境界条件として計算する必要がない。従って、装置の設計が実公平５−４６４３０号公報の装置に比べて簡単になる。
【００２４】
（１−４）接触阻止手段である結束板１６の配置位置は、超音波振動振幅の節部Ｅ１の位置であるため、線状部材１５の振動が保護カバー１８に伝わることはない。従って、保護カバー１８は、線状部材１５の先端部以外の箇所の振動部分が超音波発生伝達装置１０以外の物に接触しないようにするという本来の役割を果たし得る。
【００２５】
（１−５）実公平５−４６４３０号公報の装置を用いて患部の切開あるいは破砕を行なう場合、挿入管を撓ませて挿入管の挿入管を患部に到達させることもある。しかし、実公平５−４６４３０号公報の装置を撓ませた場合には、複数の線状部材を結束している結束部が保護カバーに接触するおそれがある。この結束部は、超音波振動振幅の腹部の位置であるため、この結束部に接触した保護カバーの箇所が摩耗したり、熱で溶けるといった問題が生じる。
【００２６】
本実施の形態では、保護カバー１８は、線状部材１５の長さの範囲内における超音波振動振幅の全ての節部Ｅ１の位置にある結束板１６によっていずれの線状部材１５からも離間するように支持されている。即ち、線状部材１５の両端部を除いた線状部材１５の長さの範囲における超音波振動振幅の全ての腹部Ｅ２は、隣合う結束板１６の間に位置することになる。従って、挿入管１２を撓ませた場合にも、超音波振動振幅の腹部Ｅ２が保護カバー１８に接触するおそれが非常に少なくなる。即ち、超音波振動振幅の節部Ｅ１に配設された結束板１６によって線状部材１５から離間するように保護カバー１８を支持した構成は、線状部材１５と保護カバー１８とが接触しない範囲での挿入管１２の曲げ許容度を高める。
【００２７】
（１−６）線状部材１５を挿通するための支持孔１６１を備えた結束板１６の形成は容易である。複数本の線状部材１５を互いに離間して挿通させる結束板１６は、複数本の線状部材１５を互いに離間するように束ねる結束手段として簡便である。
【００２８】
（１−７）超音波治療器に好適な構造の超音波発生伝達装置１０は、操作性の観点から軽量化を要求される。軽量かつ高強度のマグネシウム系金属は、結束板１６の材質として好適である。
【００２９】
次に、図４の第２の実施の形態を説明する。第１の実施の形態と同じ構成部には同じ符号が用いてある。
結束板１６の支持孔１６１の両開口にはテーパ１６２，１６３が設けてある。結束板１６の厚みが第１の実施の形態の場合と同じとすると、線状部材１５に対する結束板１６の接触範囲は、第１の実施の形態の場合よりも短くなる。この実施の形態においても、結束板１６の厚みの中心が超音波振動振幅の節部Ｅ１の位置に一致させてある。従って、線状部材１５と結束板１６との接触箇所が超音波振動振幅の節部Ｅ１の位置から最大にずれる長さΔ（図４に示す）は、第１の実施の形態の場合よりも短くなる。振動している線状部材１５と結束板１６との間の擦れ度合いは、ずれ長さΔが大きくなるほど大きくなり、発熱や摩耗の発生のおそれが大きくなる。従って、このずれ長さΔは短いほどよく、テーパ１６２，１６３は、ずれ長さΔを短くする上で簡便な手段である。
【００３０】
次に、図５の第３の実施の形態を説明する。第１の実施の形態と同じ構成部には同じ符号が用いてある。
この実施の形態におけるマグネシウム系金属製の結束板１６Ａは、超音波振動振幅の腹部Ｅ２の位置に配置されている。線状部材１５と結束板１６Ａとは支持孔１６１にて溶接して固定されている。保護カバー１８は、超音波振動振幅の節部Ｅ１の位置に配置されたマグネシウム系金属製の支持リング１９の外周面に結合されている。全ての線状部材１５は、支持リング１９の内側に挿通されている。結束手段である結束板１６Ａと保護カバー１８とは離間させてある。
【００３１】
第３の実施の形態では、第１の実施の形態における（１−１）項、（１−６）項及び（１−７）項と同じ効果が得られる。又、支持リング１９は、線状部材１５と保護カバー１８との接触を防止する役割を果たす。接触阻止手段である支持リング１９の内周面は、一部の線状部材１５に接触するが、支持リング１９の配置位置は、超音波振動振幅の節部Ｅ１の位置であるため、線状部材１５の振動が保護カバー１８に伝わることはない。従って、支持リング１９は、第１の実施の形態における（１−４）項と同様の効果をもたらす。又、支持リング１９は、線状部材１５と保護カバー１８とが接触しない範囲での挿入管１２の曲げ許容度を高める。
【００３２】
本発明では以下のような実施の形態も可能である。
（１）結束板１６と線状部材１５とを溶接等によって固定すること。
（２）超音波振動振幅の節部Ｅ１の位置から少しずれた位置に結束板１６を配置すること。
【００３３】
（３）線状部材１５の長さの範囲内における超音波振動振幅の節部Ｅ１の位置に対し、結束板１６を間欠的に配置すること。即ち、挿入管１２に求められている曲げ易さに対応しつつ、保護カバー１８と線状部材１５とが接触しないようにできる場合には、線状部材１５の長さの範囲内における超音波振動振幅の全ての節部Ｅ１の位置に結束板１６を配置する必要はない。
【００３４】
（４）第２の実施の形態におけるテーパ１６２，１６３を交差させ、結束板１６と線状部材１５とを線接触させること。
（５）結束板１６，１６Ａを線状部材１５と同じ材料で形成すること。
【００３５】
前記した実施の形態から把握できる請求項記載以外の発明について以下に記載する。
〔１〕複数本の前記線状部材は、前記結束板に対して固定することなく挿通されている。
【００３６】
〔２〕複数本の前記線状部材と前記結束板とは結合して固定されている。
〔３〕前記結束板の材質は、マグネシウム系金属である。
【００３７】
【発明の効果】
以上詳述したように本発明では、複数本の線状部材を互いに離間するように束ねたので、複数本の線状部材を束ねて伝達部を構成した場合にも熱発生を抑制し得るという優れた効果を奏する。
【図面の簡単な説明】
【図１】第１の実施の形態を示し、要部拡大断面図及びグラフを組み込んだ側断面図。
【図２】図１のＡ−Ａ線断面図。
【図３】結束板１６の斜視図。
【図４】第２の実施の形態を示す要部拡大側断面図。
【図５】第３の実施の形態を示し、要部拡大断面図及びグラフを組み込んだ側断面図。
【符号の説明】
１０…超音波発生伝達装置。１１…振動部。１２…伝達部となる挿入管。１５…線状部材。１６…接触阻止手段及び結束手段となる結束板。１６Ａ…結束手段となる結束板。１８…保護カバー。１９…接触阻止手段となる支持リング。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ultrasonic wave generation and transmission device suitable for use in destruction of calculi such as gallstones and kidney stones, destruction of cells such as cancer, ultrasonic cleaning, and the like.
[0002]
[Prior art]
Such an ultrasonic generating and transmitting apparatus is disclosed in Japanese Utility Model Laid-Open No. 62-152704 and Japanese Utility Model Publication No. 5-46430. The ultrasonic vibration oscillated by the ultrasonic vibrating unit is transmitted via a transmitting unit in which a plurality of linear members are bundled. The transmission section formed of a single linear member has a disadvantage that the cross-sectional area is small and the ultrasonic vibration cannot be transmitted sufficiently. The configuration in which a plurality of linear members are bundled makes it possible to eliminate the above-mentioned disadvantage by increasing the cross-sectional area of the transmission unit.
[0003]
[Problems to be solved by the invention]
However, in each of the apparatuses disclosed in Japanese Utility Model Laid-Open No. 62-152704 and Japanese Utility Model Publication No. 5-46430, a plurality of linear members are bundled so that adjacent linear members are in contact with each other. Heat is generated by rubbing between the linear members. Therefore, a cooling device for preventing heat generation as disclosed in Japanese Utility Model Application Laid-Open No. Sho 62-152704 is indispensable, and the size of the ultrasonic wave generation and transmission device is increased. Increasing the size of the ultrasonic generating and transmitting device is particularly inconvenient in an ultrasonic treatment device or the like used by being inserted into a human body.
[0004]
An object of the present invention is to provide an ultrasonic wave generation and transmission device that can suppress heat generation even when a transmission unit is configured by bundling a plurality of linear members.
[0005]
[Means for Solving the Problems]
Therefore, the present invention is directed to an ultrasonic generating and transmitting apparatus including a transmitting unit that transmits ultrasonic vibration from a vibrating unit, and in the invention according to claim 1, the transmitting unit is configured to transmit ultrasonic vibration. A plurality of linear members, a binding unit that bundles the plurality of linear members so as to be separated from each other, and a protective cover that surrounds the plurality of the linear members and the binding unit , The binding means is configured to bind the plurality of linear members in the vicinity of the node of the ultrasonic vibration amplitude, and the binding means is provided with a plurality of support holes so as to be separated from each other. The linear members are inserted into the plurality of linear members, and the linear members are separated from each other, and the protective cover is supported by the binding means so as to be separated from the plurality of linear members .
[0006]
Since the bundled plural linear members are separated from each other, heat generation between adjacent linear members transmitting ultrasonic vibration is avoided. Further, the linear member does not vibrate at the node of the ultrasonic vibration amplitude. For this reason, heat generation at a binding portion between the binding member that binds the linear member at the node of the ultrasonic vibration amplitude and the linear member is suppressed. In addition, the configuration in which the protective cover and the linear member are separated by the binding unit increases the bending tolerance of the transmission unit in a range where the linear member and the protective cover do not come into contact with each other. Further, the binding means is simple as a means for binding the plurality of linear members so as to be separated from each other.
According to a second aspect of the present invention, in the first aspect of the present invention , both openings of the support hole in the binding means are tapered .
[0008]
According to a third aspect of the present invention, in the first or second aspect of the present invention , the linear member is inserted into each of the support holes without being fixed .
[0009]
In the invention 請 Motomeko 4, in the invention of claim 1 or claim 2, wherein the linear member and the binding means is fixed in said support hole.
[0010]
In the invention 請 Motomeko 5, in the invention of any one of claims 1 to 4, the material of the uniting means is a magnesium-based metal.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0013]
FIG. 1 shows an ultrasonic wave generation and transmission device 10 having a structure suitable for an ultrasonic treatment device. The ultrasonic wave generating and transmitting device 10 includes a vibrating unit 11 that generates ultrasonic waves, and an insertion tube 12 connected to the vibrating unit 11.
[0014]
The vibrating unit 11 includes a vibrator 13 that oscillates by supplying an electric signal, and a conical horn 14 connected to the vibrator 13. For example, a Langevin vibrator is used for the vibration unit 11. The horn 14 amplifies the ultrasonic vibration oscillated by the vibrator 13.
[0015]
The insertion tube 12 is connected to a plurality of linear members 15 having a single linear shape, a plurality of disk-shaped binding plates 16 for binding the plurality of linear members 15, and a tip of the plurality of binding plates 16. It comprises an operating portion 17 and a protective cover 18 surrounding the plurality of linear members 15 and the plurality of binding plates 16. The linear member 15 having a circular cross section transmits the ultrasonic vibration amplified by the horn 14 to the operation unit 17. The operating portion 17 to which the ultrasonic vibration has been transmitted via the plurality of linear members 15 is brought into contact with the affected part to perform incision or crushing.
[0016]
The linear member 15 is made of a material that has a high transmission efficiency of ultrasonic vibration and is easy to bend. A suitable material for the linear member 15 is, for example, stainless steel, a titanium alloy, an elastic alloy, or the like. As the material of the binding plate 16, a lightweight and high-strength material, for example, magnesium metal or a metal mainly composed of magnesium is used. Hereinafter, these metals are referred to as magnesium-based metals. The protective cover 18 is made of an elastic material that is easily bent, for example, a synthetic resin.
[0017]
As shown in FIG. 3, a plurality of support holes 161 are provided in the binding plate 16 in the thickness direction of the binding plate 16 so as to be separated from each other. The circular support holes 161 are arranged on a pair of circles (not shown) having a circular center at the center of the disk-shaped binding plate 16. The support holes 161 are arranged at equal intervals on each circle. As shown in FIG. 2, the linear member 15 is simply inserted into each support hole 161 without being fixed. In the illustrated example, the linear member 15 is not inserted at the center of the circle, but the linear member 15 may be inserted at the center of the circle.
[0018]
The base end of each linear member 15 is connected to the distal end of the horn 14 having the smallest stress by welding, and the operating portion 17 is connected to the distal end of each linear member 15 by welding. That is, the intermediate portions of the plurality of linear members 15 are bound by the binding plate 16 so as to be separated from each other, and both ends of the plurality of linear members 15 are separated from each other by the horn 14 and the operating portion 17. Have been united.
[0019]
A curve E shown in FIG. 1 represents a distribution curve of an ultrasonic vibration amplitude generated by the oscillation of the transducer 13, and a curve D represents a stress distribution curve. E1 in the curve E is the position of the node of the ultrasonic vibration amplitude, and E2 in the curve E is the position of the abdomen of the ultrasonic vibration amplitude. The connecting portion between the horn 14 and the linear member 15 is set to be at the position of the abdomen E2 of the ultrasonic vibration amplitude, and the connecting portion between the operating portion 17 and the linear member 15 has the ultrasonic vibration amplitude. It is set to be the position of the abdomen E2. That is, when the vibrator 13 oscillates, a standing wave indicated by a curve E is generated in the linear member 15.
[0020]
The binding plate 16 binds the plurality of linear members 15 at the position of the node E1 of the ultrasonic vibration amplitude. The center of the thickness of the binding plate 16 coincides with the position of the node E1 of the ultrasonic vibration amplitude. In the present embodiment, the binding plates 16 are disposed at positions of all the nodes E1 of the ultrasonic vibration amplitude within the range of the length of the linear member 15. The protection cover 18 is connected to the peripheral surface of the binding plate 16 that binds the plurality of linear members 15 apart from each other at the position of the node E1, and protects the insertion tube 12 even when the insertion tube 12 is bent to some extent. The cover 18 and the linear member 15 do not come into contact with each other.
[0021]
In the first embodiment, the following effects can be obtained.
(1-1) The plurality of linear members 15 bundled by the binding plate 16 as the binding means are separated from each other. Therefore, the linear members 15 transmitting the ultrasonic vibration do not rub against each other, and no heat is generated due to the rubbing between the linear members 15. Avoiding such generation of heat eliminates the need for a cooling means for cooling the insertion tube 12 which serves as a transmission unit for transmitting the ultrasonic vibration from the vibration unit 11. Therefore, the problem of increasing the size of the ultrasonic generation and transmission device due to the adoption of the cooling means is solved.
[0022]
(1-2) The linear member 15 does not vibrate at the node E1 of the ultrasonic vibration amplitude. Therefore, rubbing hardly occurs between the binding plate 16 and the linear member 15 that are bound without fixing the linear member 15 at the node E1 of the ultrasonic vibration amplitude. Therefore, heat generation due to friction between the binding plate 16 and the linear member 15 is suppressed.
[0023]
(1-3) When a plurality of linear members 15 are bound at the abdomen E2 of the ultrasonic vibration amplitude as in the device disclosed in Japanese Utility Model Publication No. 5-46430, the cross-sectional area at the bound portion of the vibrating abdomen increases. Therefore, calculation of an appropriate cross-sectional area (calculation of boundary conditions) at the binding portion becomes complicated. Such a complicated calculation makes it difficult to design the device. In the present embodiment in which the plurality of linear members 15 are bound at the node E1 which does not vibrate at the ultrasonic vibration amplitude, the cross-sectional area (the area of the cross section shown in FIG. 2) of the binding plate 16 is defined as the boundary in the above-described meaning. There is no need to calculate as a condition. Therefore, the design of the apparatus is simpler than that of the apparatus disclosed in Japanese Utility Model Publication No. 5-46430.
[0024]
(1-4) Since the arrangement position of the binding plate 16 as the contact preventing means is the position of the node E1 of the ultrasonic vibration amplitude, the vibration of the linear member 15 is not transmitted to the protective cover 18. Therefore, the protective cover 18 can play an essential role of preventing the vibrating portion other than the distal end portion of the linear member 15 from contacting anything other than the ultrasonic wave generation and transmission device 10.
[0025]
(1-5) When performing incision or crushing of an affected part using the apparatus disclosed in Japanese Utility Model Publication No. 5-46430, the insertion tube may be bent to reach the affected part. However, when the device disclosed in Japanese Utility Model Publication No. 5-46430 is bent, there is a possibility that a binding portion binding a plurality of linear members may come into contact with the protective cover. Since the binding portion is located at the position of the abdomen of the ultrasonic vibration amplitude, there arises a problem that a portion of the protective cover in contact with the binding portion is worn or melted by heat.
[0026]
In the present embodiment, the protective cover 18 is separated from any of the linear members 15 by the binding plates 16 at the positions of all the nodes E1 of the ultrasonic vibration amplitude within the length range of the linear member 15. It is supported as follows. That is, all the abdominal portions E2 of the ultrasonic vibration amplitude in the range of the length of the linear member 15 excluding both end portions of the linear member 15 are located between the adjacent binding plates 16. Therefore, even when the insertion tube 12 is bent, the possibility that the abdomen E2 of the ultrasonic vibration amplitude comes into contact with the protective cover 18 is greatly reduced. That is, the configuration in which the protective cover 18 is supported by the binding plate 16 disposed at the node E1 of the ultrasonic vibration amplitude so as to be separated from the linear member 15 is in a range where the linear member 15 and the protective cover 18 do not come into contact with each other. The bending tolerance of the insertion tube 12 is increased.
[0027]
(1-6) It is easy to form the binding plate 16 having the support holes 161 through which the linear members 15 are inserted. The binding plate 16 through which the plurality of linear members 15 are inserted while being separated from each other is simple as a binding unit that binds the plurality of linear members 15 so as to be separated from each other.
[0028]
(1-7) The ultrasonic generating and transmitting device 10 having a structure suitable for an ultrasonic therapeutic device is required to be lightweight from the viewpoint of operability. A lightweight and high-strength magnesium-based metal is suitable as a material of the binding plate 16.
[0029]
Next, a second embodiment of FIG. 4 will be described. The same components as those in the first embodiment are denoted by the same reference numerals.
Tapers 162 and 163 are provided at both openings of the support hole 161 of the binding plate 16. Assuming that the thickness of the binding plate 16 is the same as in the first embodiment, the range of contact of the binding plate 16 with the linear member 15 is shorter than in the first embodiment. Also in this embodiment, the center of the thickness of the binding plate 16 is matched with the position of the node E1 of the ultrasonic vibration amplitude. Therefore, the length Δ (shown in FIG. 4) at which the contact point between the linear member 15 and the binding plate 16 is shifted from the position of the node E1 of the ultrasonic vibration amplitude to the maximum is Δ in comparison with the case of the first embodiment. Be shorter. The degree of friction between the vibrating linear member 15 and the binding plate 16 increases as the displacement length Δ increases, and the risk of heat generation and wear increases. Therefore, the shorter the shift length Δ, the better, and the tapers 162, 163 are a simple means for reducing the shift length Δ.
[0030]
Next, a third embodiment of FIG. 5 will be described. The same components as those in the first embodiment are denoted by the same reference numerals.
The binding plate 16A made of a magnesium-based metal in this embodiment is disposed at the position of the abdomen E2 of the ultrasonic vibration amplitude. The linear member 15 and the binding plate 16A are fixed by welding at the support holes 161. The protective cover 18 is coupled to an outer peripheral surface of a support ring 19 made of a magnesium-based metal disposed at a position of the node E1 of the ultrasonic vibration amplitude. All the linear members 15 are inserted inside the support ring 19. The binding plate 16A as the binding means and the protective cover 18 are separated from each other.
[0031]
In the third embodiment, the same effects as (1-1), (1-6) and (1-7) in the first embodiment can be obtained. Further, the support ring 19 plays a role of preventing the linear member 15 from contacting the protective cover 18. The inner peripheral surface of the support ring 19, which is a contact preventing means, contacts some linear members 15, but the support ring 19 is located at the node E1 of the ultrasonic vibration amplitude. The vibration of the member 15 is not transmitted to the protective cover 18. Therefore, the support ring 19 has the same effect as the item (1-4) in the first embodiment. Further, the support ring 19 enhances the bending tolerance of the insertion tube 12 in a range where the linear member 15 and the protective cover 18 do not contact each other.
[0032]
In the present invention, the following embodiments are also possible.
(1) The binding plate 16 and the linear member 15 are fixed by welding or the like.
(2) The binding plate 16 is arranged at a position slightly shifted from the position of the node E1 of the ultrasonic vibration amplitude.
[0033]
(3) The binding plate 16 is intermittently arranged at the position of the node E1 of the ultrasonic vibration amplitude within the range of the length of the linear member 15. In other words, if the protection cover 18 and the linear member 15 can be prevented from contacting each other while corresponding to the flexibility required for the insertion tube 12, the ultrasonic waves within the length of the linear member 15 can be obtained. It is not necessary to arrange the binding plate 16 at the positions of all the nodes E1 of the vibration amplitude.
[0034]
(4) The tapers 162 and 163 in the second embodiment are crossed, and the binding plate 16 and the linear member 15 are brought into line contact.
(5) The binding plates 16, 16A are formed of the same material as the linear member 15.
[0035]
Inventions other than those described in the claims that can be grasped from the above-described embodiment will be described below.
[1] a plurality of the linear member, that is inserted without fixing to the tie plate.
[0036]
[2] The plurality of the linear member of the binding plate that is fixedly coupled to.
[3] The material of the tie plate, Ru magnesium-based metal der.
[0037]
【The invention's effect】
As described in detail above, in the present invention, since a plurality of linear members are bundled so as to be separated from each other, heat generation can be suppressed even when a plurality of linear members are bundled to form a transmission unit. It has excellent effects.
[Brief description of the drawings]
FIG. 1 shows a first embodiment, and is an enlarged sectional view of a main part and a side sectional view incorporating a graph.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a perspective view of a binding plate 16;
FIG. 4 is an enlarged side sectional view of a main part showing a second embodiment.
FIG. 5 shows a third embodiment, and is an enlarged sectional view of a main part and a sectional side view incorporating a graph.
[Explanation of symbols]
10 ... Ultrasonic generation transmission device. 11: vibrating part. 12 ... Insertion tube which becomes a transmission part. 15 ... Linear member. 16: Binding plate serving as contact preventing means and binding means. 16A: Binding plate serving as binding means. 18 ... Protective cover. 19: Support ring serving as contact blocking means.

Claims (5)

振動部からの超音波振動を伝達する伝達部を備えた超音波発生伝達装置において、
前記伝達部は、
超音波振動を伝達するための複数本の線状部材と、
複数本の前記線状部材を互いに離間するように束ねた結束手段と、
複数本の前記線状部材及び前記結束手段の周囲を包囲する保護カバーとを備え、
前記結束手段は複数本の前記線状部材を超音波振動振幅の節部の付近で結束する構成となっており、該結束手段には互いに離間するように複数の支持孔が設けられ、各支持孔に前記線状部材が挿通されて各線状部材が互いに離間され、前記保護カバーは前記結束手段によって複数本の前記線状部材から離間するように支持された超音波発生伝達装置。In an ultrasonic generation transmission device having a transmission unit that transmits ultrasonic vibration from the vibration unit,
The transmission unit,
A plurality of linear members for transmitting ultrasonic vibration,
Binding means for binding a plurality of the linear members so as to be separated from each other ;
A protective cover surrounding the plurality of the linear members and the binding means ,
The binding means is configured to bind the plurality of linear members in the vicinity of a node having an ultrasonic vibration amplitude, and the binding means is provided with a plurality of support holes so as to be separated from each other. An ultrasonic wave generation and transmission device wherein the linear members are inserted into the holes to separate the linear members from each other, and the protective cover is supported by the binding means so as to be separated from the plurality of linear members . 前記結束手段における前記支持孔の両開口にはテーパが設けられている請求項１に記載の超音波発生伝達装置。The ultrasonic generating and transmitting device according to claim 1, wherein both openings of the support hole in the binding means are provided with a taper . 前記各支持孔には前記線状部材が固定されることなく挿通されている請求項１又は請求項２に記載の超音波発生伝達装置。 It said ultrasonic generating transmission device according to claim 1 or claim 2 is inserted without the linear member is fixed to the support hole. 前記線状部材と前記結束手段とは前記支持孔にて固定されている請求項１又は請求項２に記載の超音波発生伝達装置。The ultrasonic generating and transmitting device according to claim 1 , wherein the linear member and the binding unit are fixed by the support hole . 前記結束手段の材質は、マグネシウム系金属である請求項１〜請求項４のうちいずれか一項に記載の超音波発生伝達装置。The material of the uniting means is an ultrasonic generator transmission device according to any one of claims 1 to 4 is magnesium-based metal.
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EP01271262A EP1344575B1 (en) 2000-12-21 2001-12-19 Ultrasonic wave generating/transmitting apparatus
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