JPH0670938A - Ultrasonic processing device - Google Patents

Ultrasonic processing device

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Publication number
JPH0670938A
JPH0670938A JP5172185A JP17218593A JPH0670938A JP H0670938 A JPH0670938 A JP H0670938A JP 5172185 A JP5172185 A JP 5172185A JP 17218593 A JP17218593 A JP 17218593A JP H0670938 A JPH0670938 A JP H0670938A
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Japan
Prior art keywords
pipe
vibration
ultrasonic
surface
horn
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JP5172185A
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Japanese (ja)
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JP3386517B2 (en
Inventor
Bunji Akimoto
文二 秋元
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Olympus Optical Co Ltd
オリンパス光学工業株式会社
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Priority to JP19342392 priority Critical
Priority to JP4-193423 priority
Application filed by Olympus Optical Co Ltd, オリンパス光学工業株式会社 filed Critical Olympus Optical Co Ltd
Priority to JP17218593A priority patent/JP3386517B2/en
Publication of JPH0670938A publication Critical patent/JPH0670938A/en
Application granted granted Critical
Publication of JP3386517B2 publication Critical patent/JP3386517B2/en
Anticipated expiration legal-status Critical
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Abstract

PURPOSE:To make the amplitude of a distal end of a vibration transmitting member large while making the breakage of the vibration transmitting member hard, and to prevent fragments from remaining in the human body even though the needle is broken, by forming a protecting film made of an organic polymer or inorganic polymer, on the surface of the vibration transmitting member having a length which is set so as to satisfy a specified condition. CONSTITUTION:The length of a pipe 3 is set to n/2.lambda (n is a natural number and lambda is a wavelength). Further, the loop of an ultrasonic vibration (b) is set so as to be positioned at the boundary between a horn 2 and the pipe 3, and the ultrasonic vibration (b) transmitted from the vibrator is transmitted to the pipe 3 so that the distal end (t) of the pipe 3 is located in the loop. Further, a protecting film 4 is laid on the outer surface of the pipe 3. Accordingly, the ultrasonic vibration (b) is transmitted to the pipe 3 through the horn 2, a stressed part (r) is induced in the pipe 3. However, since the protecting film 4 is filled in a defect 5, no stress concentration occurs. Thereby it is possible to increase a fatigue proof strength.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、超音波振動で生体組織や結石破壊等の処置を行う超音波処置装置に関する。 The present invention relates to an ultrasonic treatment apparatus that performs treatment of the living tissue and calculus destruction by ultrasonic vibration.

【0002】 [0002]

【従来の技術】最近、超音波処置装置を用いて、前立腺の切除術や結石の破壊等の処置が行なわれている。 Recently, using an ultrasonic treatment apparatus, the treatment of destruction of resection and calculus of prostate is performed. かかる超音波処置装置は、振動子とホーンを連結するとともに、そのホーンの先端に振動伝達部材を連結して構成されており、振動子から発生する超音波振動をホーンで増幅(集中)して振動伝達部材に伝達し、振動伝達部材の先端を生体内の患部組織に押し当てることにより、該先端で組織を破壊切断したり、乳化させたりしている。 Such ultrasonic treatment apparatus is configured to couple the transducer and the horn is configured by connecting a vibration transmitting member to the tip of the horn, it is amplified by the horn of the ultrasonic vibration generated by the vibrator (concentration) vibration transmitted to the transmission member, by pressing the distal end of the vibration transmitting member to the diseased tissue in a living body, or to destroy cut tissue in a tip, and or to emulsify. ところで、図8に示すように、振動伝達部材としてパイプaを用いた超音波処置装置においては、従来より、図8 Meanwhile, as shown in FIG. 8, in the ultrasonic treatment apparatus using a pipe a as a vibration transmitting member is conventionally 8
(A)に示すようにパイプaに対しパイプ先端tにおいて振幅の腹となるように超音波振動bを伝えることが行なわれている。 It is transmitted ultrasonic vibrations b such that the amplitude of the belly has been carried out in (A) to indicate a pipe tip t to the pipe a so. すなわち、パイプ先端tに最大振幅を生じさせて上記各種の処置を行なうようにしている。 That is, causing the maximum amplitude and to perform the treatment of the various pipe tip t. そして、図8(B)に示すように、この時の応力分はrのようである。 Then, as shown in FIG. 8 (B), the stress component at this time is as r. しかるに、このような超音波処置装置の振動伝達部材は、通常、細径の金属パイプが長時間かつ長期間使用されるため、金属疲労や振動摩擦による発熱等により振動伝達部材の機械的強度が低下し、使用中に折損することがある。 However, the vibration transmitting member of such an ultrasonic treatment apparatus, generally because the small-diameter metal pipe is used for a long time and a long period of time, the mechanical strength of the vibration transmission member by heat generation due to metal fatigue and vibration friction reduced, sometimes broken during use. このようにパイプが使用中に折損すると、例えば腎臓内の結石を破砕する超音波処置装置では、振動伝達部材の折損片が腎臓内に残留して回収不能となる可能性があり、極めて危険であった。 With such pipe breakage during use, for example, an ultrasonic treatment device to crush the stones in the kidney, there is a possibility that broken pieces of the vibration transmitting member is irrecoverable remaining in the kidneys, extremely dangerous there were. そこで、このような事故を防ぐために、特開昭63−122447 Therefore, in order to prevent such an accident, JP-A-63-122447
号公報で開示されるように、パイプの振動子側の付け根に機械的強度の弱い部分を設けて、パイプを振動させた場合、最初に弱い部分から折れるような構造とし、使用中にパイプが切損した場合に容易に回収できるようにしている。 As disclosed in JP, at the base of the vibrator-side of the pipe by providing a weak mechanical strength, when vibrating the pipe, a structure such as broken from first weak, the pipe during use and so as to be easily recovered when Setsuson.

【0003】 [0003]

【発明が解決しようとする課題】しかし、特開昭63− The object of the invention is to be Solved However, JP-A-63-
122447号公報の超音波処置装置によれば、それ以前の超音波処置装置が有していた、折損した破片が体内に残る危険性は減少するが、パイプ自体は超音波振動に対し強度向上がなされておらず、逆に強度の弱い部分を設けたため、加えることができる振幅は小さくなる。 According to the ultrasonic treatment apparatus 122447 JP, previous ultrasonic treatment device had, but broken and debris is decreased risk of remaining in the body, the pipe itself is improving the strength against the ultrasonic vibration not made that, since having a weak strength Conversely, the amplitude can be added is small. よって、結石等を破砕する能力が劣るばかりでなく、大振幅を必要とする組織の乳化処置が難しくなる。 Thus, not only inferior in ability to crush the stones or the like, emulsification treatment of tissue that requires a large amplitude is difficult. また、意図的にパイプに折れ易い部分を設けるために、超音波処置装置の寿命が短くなりコスト的な問題が生じる。 Further, in order to intentionally providing easy part Slight pipe, cost issues life of the ultrasonic operating apparatus is shortened occur. 本発明は、上記従来技術の問題点に鑑みなされたもので、振動伝達部材先端の振幅を大きく振動させることができるとともに、折損(疲労破壊)しにくく、かつ仮に破損した場合にあっても破損片を体内に残すことがない超音波処置装置を提供することを目的とする。 The present invention, the intended conventionally been made in view of the problems of the technique, it is possible to significantly vibrate the amplitude of the vibration transmission member tip, breakage (fatigue fracture) hardly, and even when the provisionally damaged damaged and to provide a no ultrasonic treatment device to leave the piece in the body.

【0004】 [0004]

【課題を解決するための手段】上記目的を達成するために、本発明は、超音波振動子が発生するエネルギーを増幅するホーンと、n/2・λ(nは自然数、λは波長) To achieve the above object of the Invention The present invention includes a horn to amplify the energy ultrasonic vibrator are generated, n / 2 · λ (n is a natural number, lambda is the wavelength)
を満たす長さに設定されるとともに上記ホーンとの接続部が超音波振動の腹となるように接合した振動伝達部材とを有する超音波処置装置において、上記振動伝達部材の表面に有機ポリマーまたは無機ポリマーからなる保護膜を設けて構成した。 In the ultrasonic treatment apparatus having while being set to a length and a vibration transmission member which is joined to the connecting portion between the horn becomes an antinode of the ultrasonic vibrations satisfying, organic polymers or inorganic to the surface of the vibration transmission member which is configured by providing a protective film made of a polymer. このとき、振動伝達部材は、パイプ形状の他、棒状のものも用いられ、その構成材料としては、金属疲労強度が高くかつ共振させたときに振幅が大きい(ヤング率の小さい)材料であるTi合金(Ti Ti this time, the vibration transmission member, another pipe-like, also used as rod-shaped, as its constituent material, (lower Young's modulus) amplitude is larger when the metal fatigue strength is high and is resonated a material alloy (Ti
−15V−3Al−3Sn−3Cr)を用いることができる。 -15V-3Al-3Sn-3Cr) can be used. また、保護層に用いるポリマーとしては、エポキシ系接着剤のような有機物あるいはポリシラザンのような無機物が用いられ、ディッピング、吹き付け、刷毛塗り等により保護層を設けることができる。 As the polymer used in the protective layer, inorganic substances such as organic or polysilazane, such as an epoxy-based adhesive is used, dipping, spraying, a protective layer may be provided by brushing. さらに、保護層(膜)の厚さは、振動伝達部材の共振による伸び縮みを抑えない厚さ、経験的に10μm以下程度が好ましい。 Further, the thickness of the protective layer (film) is not restrained expansion and contraction due to resonance of the vibration transmission member thickness, preferably extent empirically 10μm or less.

【0005】 [0005]

【作用】超音波振動により共振している振動伝達部材では、部分的に振動伝達部材の伸び縮みに対応して、応力が長さ方向に発生するが、かかる応力は節で最大となり、腹で最小となる。 [Action] In the vibration transmission member is resonated by ultrasonic vibration in response to expansion and contraction of the partially vibration transmitting member, the stress is generated in the length direction, stress is maximized in the section, in the abdominal smallest. この時の振動パターンは、振動伝達部材の先端が腹(最大振幅)となるようにしてあるため、先端部で効率的に組織の乳化等の処置が可能となる。 Vibration pattern at this time, since the leading end of the vibration transmitting member are set to be an antinode (maximum amplitude), it is possible to treat the emulsion or the like efficiently organized at the tip. また、ホーンと振動伝達部材の境界部(接続部)が腹となる振動パターンとしてあるため、この部分に生じる応力は最小となり、接続部でホーンや振動伝達部材が折れることはなくなる。 Further, since the boundary portion of the horn and the vibration transmission member (connecting portion) is a vibration pattern which is a belly, stress generated in this portion becomes minimum, it will not be broken horn and vibration transmission member by the connecting portion. このとき振動伝達部材の節部にかかる(引張り)応力により、振動伝達部材の表面において、亀裂が発生し、さらにそれが進行して振動伝達部材の折損につながるのであるが、振動伝達部材表面は一般に無欠陥ではなくクラックや傷といった欠陥が存在し、ここに応力が集中するとともに、この表面に存在する欠陥が、亀裂の進行を促進(ノッチ効果)している。 By this time according to the node portion of the vibration transmission member (tensile) stress in the surface of the vibration transmission member, cracking is further It is lead to breakage of the vibration transmission member in progress, the vibration transmission member surface generally there are defects such as cracks and flaws rather than defect-free, along with the stress is concentrated here, defects present in the surface, promotes (notch effect) the progress of cracking.
本発明においては、表面をポリマーで覆うため、振動伝達部材表面に存在するクラック等の欠陥はポリマーにより埋められるので、応力集中を起こさずノッチ効果を生じることが押さえられえる。 In the present invention, to cover the surface with a polymer, the defects such as cracks present in the vibration transmitting member surface since it is filled with the polymer, may be pressing may produce notch effect without causing stress concentration. よって、本発明のように、 Thus, as in the present invention,
表面をポリマーで覆った振動伝達部材においては、表面を覆っていないものに比べ疲労強度が大きくなる。 In the vibration transmission member covering the surface with a polymer, the fatigue strength is increased compared with those not covering the surface. さらに、表面を振動伝達部材の材料よりも延性に富んだポリマーで覆っているので、仮に振動伝達部材が破損した場合でも、その破損片は表面のポリマー層に覆われているため、体内に残留することはない。 Furthermore, since the covered with rich surfaces to ductile than the material of the vibration transmission member polymers, even when the provisionally vibration transmitting member is damaged, since the broken pieces is covered with a polymer layer on the surface, it remains in the body do not be.

【0006】 [0006]

【実施例1】図1は、本発明に係る超音波処置装置の実施例1における振動伝達部材であるパイプを示す断面図、図2は、超音波処置装置を示す正面図、図3は、パイプに生じる振幅及び応力状態を示す説明図である。 Embodiment 1 FIG. 1 is a sectional view showing the pipe which is a vibration transmitting member in the first embodiment of the ultrasonic treatment apparatus according to the present invention, FIG. 2 is a front view showing an ultrasonic treatment apparatus, FIG. 3, is an explanatory view showing the amplitude and stress conditions resulting in the pipe. 図2において、1はランジュバン型の振動子(圧電素子、 2, reference numeral 1 denotes Langevin type vibrator (piezoelectric elements,
電極、ブロックを接続してなる)、2は振動子1に連結したコニカル型のホーン、3はホーン2の先端に連結した振動伝達部材としてのパイプである。 Electrode, formed by connecting the block), 2 Conical horn coupled to the transducer 1, 3 is a pipe as a vibration transmission member connected to the tip of the horn 2. これらの振動子1,ホーン2,パイプ3は、それぞれ各部品の接続部にねじ部が設けられ、このねじ部により螺合接続されている。 These vibrators 1, horn 2, pipe 3, a screw portion is provided on the connection part of each component, respectively, it is threaded connection by the threaded portion.

【0007】パイプ3は、その長さがn/2・λ(nは自然数、λは波長)となるように設定されるとともに、 [0007] Pipe 3, whose length is n / 2 · λ (n is a natural number, lambda is the wavelength) while being set so that,
振動子1から発する超音波振動bの腹が、図3(A)に示すようにホーン2とパイプ3の境界部に位置するように定められており、パイプ3の先端tが腹となるように超音波振動bをパイプへ伝達させることができるようにしている。 Antinodes of the ultrasonic vibrations b emanating from the transducer 1, Figure 3 is determined to be located in the boundary portion of the horn 2 and the pipe 3 (A), a so that the tip t of the pipe 3 becomes an antinode ultrasonic vibration b so that it is possible to transmit to the pipe. そして、パイプ3の表面には、図1に示すように、保護膜4が設けられている。 On the surface of the pipe 3, as shown in FIG. 1, the protective film 4 is provided. この保護膜4は、パイプ3に熱処理(500℃、6時間の時効)を施した後、ディッピングにより2液混合型エポキシ系接着剤((株)アルファ技研、商品名アルテコF−05)を表面に塗布し、80℃の温度で2時間加熱硬化して形成した。 The protective film 4 is heat-treated in the pipe 3 (500 ° C., aged for 6 hours) was subjected to two-liquid mixed epoxy adhesive by dipping (Corporation Alpha Giken, trade name Aruteko F-05) the surface It was applied to, formed by heating for 2 hours curing at a temperature of 80 ° C.. ここに、パイプ3の表面を微視的に観ると、図4に示すように欠陥5があるが、保護膜4は、この欠陥5を埋めるのが目的であるため、パイプ3の全面を覆っていればかならずしも均一な厚さにする必要がないが、エポキシ系接着剤は接着力が強いので余り厚いと、保護膜4 Here, looking at the surface of the pipe 3 microscopically, there is a defect 5 as shown in FIG. 4, the protective film 4, since that fill the defect 5 is a purpose, cover the entire surface of the pipe 3 Although it is not necessary to necessarily uniform thickness if an epoxy-based adhesive when thicker too because strong adhesion, the protective film 4
によりTi合金からなるパイプ3の共振による伸び縮みを抑えてしまう虞れがあるため、保護膜4の厚さは10 Because there is a possibility that would suppress the expansion and contraction due to resonance of the pipe 3 made of Ti alloy, the thickness of the protective film 4 is 10
μm以下が好ましい。 μm or less. なお、図5は、パイプ3が共振により伸び縮みする際にパイプ3表面に存在する欠陥5による応力集中効果(ノッチ効果)の影響で、パイプ3に亀裂6が生じている状態を示している。 Incidentally, FIG. 5, the influence of the stress concentration effect of defects 5 the pipe 3 is present in the pipe 3 surface upon expansion and contraction due to the resonance (notch effect) shows a state in which a crack 6 has occurred in the pipe 3 .

【0008】本実施例の超音波処置装置にあっては、振動子1に駆動電圧を印加すると、振動子1からの超音波振動bがホーン2を通じてパイプ3へ伝達され、また、 [0008] In the ultrasonic treatment apparatus of this embodiment, when a drive voltage is applied to the vibrator 1, the ultrasonic vibrations b from the vibrator 1 is transmitted to the pipe 3 through the horn 2, also,
パイプ3には図3(B)に示すような応力部分rが生ずる。 The pipe 3 caused stress portion r as shown in Figure 3 (B). このとき、一般に、パイプは共振による伸び縮みを繰り返し、パイプ表面に存在する欠陥部でノッチ効果を起こすが、本実施例におけるパイプ3は、表面に保護膜4を設け欠陥5を埋めてあるため応力集中を起こすことなく、パイプ3を振動させることができる。 At this time, in general, the pipe repeatedly expansion and contraction due to resonance, for causing a notch effect in defect present on the pipe surface, the pipe 3 in this embodiment, that is to fill the defect 5 a protective film 4 on the surface without causing stress concentration, the pipe 3 can be vibrated.

【0009】本実施例によれば、パイプ3の表面に保護膜4を形成したので、保護膜4を設けていない従来のものに比べ、振幅を大きくしても欠陥5における応力集中がなくなり、共振時に折れることがなくなった。 [0009] According to this embodiment, since the formation of the protective film 4 on the surface of the pipe 3, compared with the conventional one not provided with the protective film 4, there is no stress concentration in the defect 5 even if increasing the amplitude, it was no longer to break at the time of resonance. このため、パイプ3の先端tの振幅を従来よりも大きくすることができ、結石等の破壊効率を高めることができた。 Therefore, the amplitude of the tip t of the pipe 3 can be made larger than conventional, it was possible to increase the breaking efficiency of the stones or the like. さらに、パイプ3の表面を保護膜4で覆ってあるため、仮にパイプ3が折れた場合でも、折れたパイプ3及びパイプ3の破片は体内に残ることなく安全である。 Furthermore, since that is covering the surface of the pipe 3 with a protective film 4, even if the pipe 3 is broken, broken pieces of the pipe 3 and the pipe 3 fold is secure without remain in the body. 実際に、 actually,
本実施例の超音波処置装置と従来技術の装置を比較すると、パイプ先端tを振幅300μmで振動させた場合、 Comparing the apparatus of the ultrasonic operating apparatus of the prior art of the present embodiment, when the pipe tip t is vibrated at an amplitude 300 [mu] m,
保護膜のない従来のパイプでは10本中9本が折れ、そのうち7本は折れた部分から先端側から取れたが、本実施例のパイプ3では、10本中1本が細径パイプの接続部分で折れたが、保護膜4により、折れた先端部が脱落することはなかった。 Broken nine in ten in the conventional pipe without protective film has been taken from the distal end side from a portion broken of which seven, the pipe 3 of this embodiment, connecting one of ten of the small-diameter pipe It broke in parts, with a protective film 4, broken tip did not fall off.

【0010】 [0010]

【実施例2】本発明の実施例2を図1を用いて以下に説明する。 Example 2 Example 2 of the present invention will be described below with reference to FIG. 本実施例は、東燃(株)製ポリシラザンPHP The present embodiment, Tonen Co., Ltd. polysilazane PHP
S−2を用い、無機ポリマーよりなる保護膜4をパイプ3の表面に設けた。 With S-2, a protective film 4 made of an inorganic polymer on the surface of the pipe 3. また、パイプ3は、β型Ti合金であるTi−15V−3Al−3Sn−3Crを用いた。 Further, the pipe 3 was used Ti-15V-3Al-3Sn-3Cr a β-type Ti alloy.
保護膜4の形成にあたり、ポリシラザンをディッピングによりパイプ3の表面に塗布し、100℃の温度で10 In forming the protective film 4, the polysilazane is applied to the surface of the pipe 3 by dipping, 10 at a temperature of 100 ° C.
分乾燥させた後、400℃、30分の焼成を行い、パイプ3の表面を覆った。 After partial drying, 400 ° C., the resulting mixture was fired in 30 minutes, cover the surface of the pipe 3. その他の構成は実施例1と同様である。 Other configurations are the same as in Embodiment 1.

【0011】本実施例によれば、上記実施例1と同様な作用、効果を得ることができる。 According to this embodiment, it is possible to obtain the same operation and effect as in the first embodiment. また、実際に、保護膜4を設けたパイプ3を使用した本実施例の超音波処置装置を、保護膜4を設けない従来の同一径パイプと同等の先端振幅300μmで振動させた場合、従来の同一径パイプでは10本中8本が折れ、そのうち5本は折れた部分から先端側が取れたが、本実施例におけるパイプ3では、10本中2本が細径パイプの接続部分で折れたが、 Further, actually, if the ultrasonic treatment apparatus of the present embodiment using a pipe 3 having the protective film 4, is vibrated in the conventional same diameter pipe and the equivalent tip amplitude 300μm without the protective film 4, a conventional broken ten 8 in the same diameter pipes, although the tip side is taken from a portion broken of which five, the pipes 3 in the present embodiment, two of ten broke at the connecting portion of the small-diameter pipe But,
表面に設けた保護膜により、折れた先端部が取れることはなかった。 The protective film provided on the surface, never broken tip can be taken.

【0012】 [0012]

【実施例3】図6は、本発明の実施例3におけるパイプの断面図、図7は、パイプに生ずる振幅と応力を示す線図である。 Third Embodiment FIG. 6 is a cross-sectional view of a pipe according to the third embodiment of the present invention, FIG. 7 is a diagram showing the amplitude and stress generated in the pipe. 図6に示すように、パイプ10は、細径部1 As shown in FIG. 6, the pipe 10, the small-diameter portion 1
0aと太径部10bとから構成され、細径部10aは、 Is composed of a 0a and the large diameter portion 10b, the small-diameter portion 10a is
パイプ10の先端から長さλ/4だけ形成されている。 It is formed by a length lambda / 4 from the tip of the pipe 10.
細径部10aと太径部10bの接続部分は、細径部10 Connecting portions of the small diameter portion 10a and the large diameter portion 10b is small-diameter portion 10
aの外径をφ 1 ,太径部10bの外径をφ 2とした場合、(φ 1 +φ 2 )/2の曲率半径を有する曲面に形成されている。 1 an outer diameter phi of a, when the outer diameter of phi 2 of the large diameter portion 10b, is formed in a curved surface having a (φ 1 + φ 2) / 2 of the radius of curvature. その他の構成は上記実施例1と同様である。 Other configurations are the same as in Example 1.

【0013】本実施例によれば、パイプ10の細径部1 According to this embodiment, the small-diameter portion of the pipe 10 1
0aの断面積をS 1 (=22mm 2 )、太径部10bの断面積をS 2 (=125mm 2 )としたとき、太径部1 The cross-sectional area of 0a S 1 (= 22mm 2) , the cross-sectional area of the large diameter portion 10b when the S 2 (= 125mm 2), the large-diameter portion 1
0bから細径部に伝えられる超音波振動は、細径部10 Ultrasonic vibration is transmitted from 0b to the small-diameter portion, the small-diameter portion 10
において、その振動が約S 2 /S 1倍に増幅されるため、図7(A)に示すように、パイプ10の先端(細径部10aの先端)の振幅を大きくすることができる。 In, since the vibration is amplified to approximately S 2 / S 1 times, as shown in FIG. 7 (A), it is possible to increase the amplitude of the tip of the pipe 10 (the tip of the small-diameter portion 10a). また、このときパイプ10にかかる応力は、図7(B)に示すように、細径部10aと太径部10bとの接続部分における細径部10aのパイプ10側で最大となる。 Also, stress applied to the pipe 10 at this time, as shown in FIG. 7 (B), the maximum pipe 10 side of the small diameter portion 10a of the connecting portion between the small diameter portion 10a and the large diameter portion 10b. このため、パイプ10に超音波振動を生じさせ場合、応力が最大となる部分のみで折れる可能性を有するが、パイプ10の全表面に保護膜4を設けてあるため、パイプ1 Therefore, when causing ultrasonic vibrations to the pipe 10, it has the potential to break only in a portion where the stress is maximized, since the entire surface of the pipe 10 is provided with a protective film 4, the pipe 1
0の表面に存在する欠陥は埋められ、上記実施例と同様にパイプ10が折れることなく振動させることができる。 Defects present in 0 the surface are filled, can be vibrated without pipe 10 similarly to the above embodiment is broken.

【0014】したがって、パイプ10に加える振幅に対して、パイプ10(細径部10a)の先端に生ずる振幅を印加振幅より大きくすることができるので、同一径のパイプを使用した場合に比べ、より効果的に結石破壊等の治療を行なうことが可能になった。 [0014] Thus, the amplitude applied to the pipe 10, since the amplitude occurring at the tip of the pipe 10 (small-diameter portion 10a) can be greater than the application amplitude, compared with the case of using the pipe of the same diameter, and more effectively it has become possible to perform the treatment of the calculus destruction. 実際に、パイプ1 In fact, the pipe 1
0に振幅60μmの超音波振動を加えたところ、パイプ10の先端部では、約S 2 /S 1 (=125/22)倍に相当する最大振幅300μmで振動させることができた。 0 was added ultrasonic vibration amplitude 60 [mu] m, in the tip end portion of the pipe 10 and can be vibrated at a maximum amplitude 300μm corresponding to approximately S 2 / S 1 (= 125 /22) times. そして、パイプ10の先端を上記のように振幅30 Then, the amplitude 30 of the tip of the pipe 10 as described above
0μmで10本振動させた時、折れたパイプはなかったが、従来の保護膜を設けない同一径のパイプでは、10 When ten was vibrated at 0 .mu.m, was not broken pipe, the pipe having the same diameter without the conventional protective film, 10
本中9本が折れ、そのうち7本は折れた部分から先端側が取れた。 Nine is broken in this, came off the tip side from the portion broken of which seven.

【0015】なお、上記各実施例において、パイプ材料として、Ti−15V−3Al−3Sn−3Crを用いた場合を示したが、例えば、表1に示すような耐力が高い材料であれば上記実施例で挙げた材料に限定されることはない。 [0015] Incidentally, in the above embodiments, as a pipe material, the case of using a Ti-15V-3Al-3Sn-3Cr, for example, the above embodiments if the yield strength is higher materials as shown in Table 1 It is not limited to the materials listed in example.

【0016】 [0016]

【表1】 [Table 1]

【0017】しかし、耐力が高くても、振幅を大きくかせぐためには、なるべくヤング率の低い材料を用いることが望ましく、表1のα+β型チタン合金、β型チタン合金は最適である。 [0017] However, even with a high yield strength, in order to earn a large amplitude, it is desirable to use a low as possible Young's modulus material, in Table 1 alpha + beta type titanium alloys, beta-type titanium alloy is optimal. 中でも、Ti−15V−3Al−3 Among them, Ti-15V-3Al-3
Sn−3Crは、長尺でかつ安定した品質でパイプ加工ができるため、現在のところ最も優れた材料であり、本実施例においても採用している。 Sn-3Cr, since it is a pipe processed in quality and stable long-length, currently the most excellent material, is adopted in the present embodiment. また、ポリマーよりなる保護層の材質もパイプの表面に確実に付着するものであれば、その材質には限定されない。 Further, as long as also the material of the protective layer made of a polymer to reliably adhere to the surface of the pipe, is not limited to the material.

【0018】 [0018]

【発明の効果】以上のように、本発明によれば、振動伝達部材の表面を保護膜で覆うので、振動伝達部材の表面に存在する欠陥部に保護膜が入り込み、欠陥部での応力集中を緩和させることができ、振動伝達部材の疲労強度を向上させることができる。 As is evident from the foregoing description, according to the present invention, since covering the surface of the vibration transmitting member with a protective film, the protective film enters the defect present on the surface of the vibration transmission member, stress concentration at the defect portion can be alleviated, it is possible to improve the fatigue strength of the vibration transmission member. また、振動部材に亀裂が生じた場合でも、振動伝達部材の表面をポリマーからなる保護膜で覆うので、振動伝達部材の折れた部分が脱落したり、破片を発生することがない。 Even when the cause cracks in the vibrating member, since covered with a protective film made of the surface of the vibration transmission member from the polymer, the fold falls off or the vibration transmission member, is not generated debris.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施例1における超音波処置装置のパイプを示す断面図である。 1 is a cross-sectional view showing the pipe of the ultrasonic operating apparatus according to the first embodiment of the present invention.

【図2】本発明の実施例1の超音波処置装置を示す正面図である。 2 is a front view showing an ultrasonic treatment apparatus of the first embodiment of the present invention.

【図3】本発明の実施例1における超音波処置装置のパイプに生じる振幅と応力を示す線図である。 3 is a diagram showing the amplitude and the stress generated in the pipe of the ultrasonic treatment apparatus in Embodiment 1 of the present invention.

【図4】図1におけるC部の拡大断面図である。 4 is an enlarged sectional view of the C portion in FIG.

【図5】パイプに生じる亀裂の状態を示すパイプの断面図である。 5 is a cross-sectional view of a pipe showing the state of a crack occurring in the pipe.

【図6】本発明の実施例3における超音波処置装置のパイプを示す断面図である。 6 is a sectional view showing a pipe of the ultrasonic operating apparatus according to the third embodiment of the present invention.

【図7】本発明の実施例3におけるパイプに生じる振幅と応力を示す線図である。 7 is a diagram showing the amplitude and the stress occurring in the pipe in the third embodiment of the present invention.

【図8】従来技術を説明するための説明図である。 8 is an explanatory diagram for explaining a conventional technology.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 振動子 2 ホーン 3 10 パイプ 4 保護膜 1 oscillator 2 horn 3 10 Pipe 4 protective film

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 超音波振動子が発生するエネルギーを増幅するホーンと、n/2・λ(nは自然数、λは波長) A horn 1. A ultrasonic transducers amplifies the energy generated, n / 2 · λ (n is a natural number, lambda is the wavelength)
    を満たす長さに設定されるとともに上記ホーンとの接続部が超音波振動の腹となるように接合した振動伝達部材とを有する超音波処置装置において、上記振動伝達部材の表面に有機ポリマーまたは無機ポリマーからなる保護膜を設けたことを特徴とする超音波処置装置。 In the ultrasonic treatment apparatus having while being set to a length and a vibration transmission member which is joined to the connecting portion between the horn becomes an antinode of the ultrasonic vibrations satisfying, organic polymers or inorganic to the surface of the vibration transmission member ultrasonic treatment apparatus characterized in that a protective film made of a polymer.
JP17218593A 1992-06-26 1993-06-18 Ultrasonic treatment device Expired - Fee Related JP3386517B2 (en)

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