JPH0670938A - Ultrasonic processing device - Google Patents

Ultrasonic processing device

Info

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
Authority
JP
Japan
Prior art keywords
pipe
vibration
transmitting member
horn
broken
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP5172185A
Other languages
Japanese (ja)
Other versions
JP3386517B2 (en
Inventor
Bunji Akimoto
文二 秋元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP17218593A priority Critical 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
Expired - Fee Related legal-status Critical Current

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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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic treatment apparatus for treating living tissue or 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。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。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
（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。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。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。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。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。そこで、こ
のような事故を防ぐために、特開昭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。2. Description of the Related Art Recently, treatments such as excision of the prostate and destruction of calculi have been performed using an ultrasonic treatment device. Such an ultrasonic treatment device is configured by connecting a vibrator and a horn and connecting a vibration transmission member to the tip of the horn, and amplifies (concentrates) the ultrasonic vibration generated from the vibrator by the horn. By transmitting the vibration to the vibration transmitting member and pressing the tip of the vibration transmitting member against the affected tissue in the living body, the tissue is destroyed and cut or emulsified at the tip. By the way, as shown in FIG. 8, in the ultrasonic treatment apparatus using the pipe a as the vibration transmitting member, the conventional ultrasonic treatment apparatus has been shown in FIG.
As shown in (A), the ultrasonic vibration b is transmitted to the pipe a so as to have an antinode of the amplitude at the pipe tip t. That is, the maximum amplitude is generated at the pipe tip t to perform the above-mentioned various treatments. Then, as shown in FIG. 8B, the stress component at this time is like r. However, in the vibration transmission member of such an ultrasonic treatment device, a metal pipe having a small diameter is usually used for a long time and for a long period of time, and therefore the mechanical strength of the vibration transmission member is increased due to heat generation due to metal fatigue or vibration friction. It may decrease and break during use. If the pipe breaks during use in this way, for example, in an ultrasonic treatment device that crushes stones in the kidney, the broken piece of the vibration transmission member may remain in the kidney and cannot be collected, which is extremely dangerous. there were. Therefore, in order to prevent such an accident, JP-A-63-122447
As disclosed in the publication, when a portion with weak mechanical strength is provided at the base of the vibrator side of the pipe and the pipe is vibrated, the structure is such that the weak portion breaks first, and the pipe is It is designed to be easily collected when cut.

【０００３】[0003]

【発明が解決しようとする課題】しかし、特開昭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。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。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。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。However, JP-A-63-
According to the ultrasonic treatment device of Japanese Patent No. 122447, the risk of broken fragments remaining in the body, which the previous ultrasonic treatment devices had, is reduced, but the strength of the pipe itself against ultrasonic vibration is improved. However, the amplitude that can be applied is reduced because a weak portion is provided. Therefore, not only is the ability to crush stones and the like poor, but the emulsification treatment of tissues that require large amplitude becomes difficult. Further, since the pipe is intentionally provided with a fragile portion, the life of the ultrasonic treatment device is shortened and a cost problem arises. The present invention has been made in view of the above-mentioned problems of the conventional technology, and can vibrate the amplitude of the tip of the vibration transmitting member greatly, is less likely to be broken (fatigue fracture), and is broken even if it is broken. An object of the present invention is to provide an ultrasonic treatment device that does not leave a piece inside 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）
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。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
−１５Ｖ−３Ａｌ−３Ｓｎ−３Ｃｒ）を用いることがで
きる。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。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。In order to achieve the above object, the present invention provides a horn for amplifying energy generated by an ultrasonic transducer and n / 2 · λ (n is a natural number, λ is a wavelength).
In a ultrasonic treatment device having a vibration transmission member which is set to a length that satisfies the above and a connection portion with the horn is joined so as to form an antinode of ultrasonic vibration, an organic polymer or an inorganic material is formed on the surface of the vibration transmission member. It was constructed by providing a protective film made of a polymer. At this time, as the vibration transmitting member, a rod-shaped member is used as well as a pipe-shaped member, and the constituent material thereof is Ti, which has a high metal fatigue strength and a large amplitude (small Young's modulus) when resonated. Alloy (Ti
-15V-3Al-3Sn-3Cr) can be used. As the polymer used for the protective layer, an organic substance such as an epoxy adhesive or an inorganic substance such as polysilazane is used, and the protective layer can be provided by dipping, spraying, brush coating or the like. Further, the thickness of the protective layer (film) is preferably a thickness that does not suppress expansion and contraction due to resonance of the vibration transmitting member, and is empirically about 10 μm 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。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。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。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。
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。よって、本発明のように、
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。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。[Function] In the vibration transmitting member that resonates by ultrasonic vibration, stress is generated in the length direction partially corresponding to the expansion and contraction of the vibration transmitting member. It is the smallest. Since the vibration pattern at this time is such that the tip of the vibration transmitting member is antinode (maximum amplitude), it is possible to efficiently perform treatment such as emulsification of tissue at the tip. Further, since the boundary portion (connection portion) between the horn and the vibration transmission member has an antinode vibration pattern, the stress generated at this portion is minimized, and the horn and the vibration transmission member are not broken at the connection portion. At this time, due to (tensile) stress applied to the nodes of the vibration transmitting member, a crack is generated on the surface of the vibration transmitting member, which further progresses and leads to breakage of the vibration transmitting member. Generally, defects such as cracks and scratches are not present, and stress is concentrated there, and the defects existing on this surface promote the progress of cracks (notch effect).
In the present invention, since the surface is covered with the polymer, defects such as cracks existing on the surface of the vibration transmitting member are filled with the polymer, so that it is possible to suppress the notch effect without causing stress concentration. Therefore, like the present invention,
The fatigue strength of a vibration transmission member whose surface is covered with a polymer is higher than that of a member whose surface is not covered. Furthermore, since the surface is covered with a polymer that is more ductile than the material of the vibration transmission member, even if the vibration transmission member is damaged, the broken pieces are covered with the polymer layer on the surface and remain in the body. There is nothing to do.

【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。図
２において、１はランジュバン型の振動子（圧電素子、
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。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。Embodiment 1 FIG. 1 is a sectional view showing a pipe which is a vibration transmitting member in Embodiment 1 of an ultrasonic treatment apparatus according to the present invention, FIG. 2 is a front view showing the ultrasonic treatment apparatus, and FIG. It is explanatory drawing which shows the amplitude and stress state which arise in a pipe. In FIG. 2, 1 is a Langevin type vibrator (piezoelectric element,
Reference numeral 2 denotes a conical horn connected to the vibrator 1 and 3 denotes a pipe as a vibration transmission member connected to the tip of the horn 2. Each of the vibrator 1, the horn 2, and the pipe 3 is provided with a screw portion at a connecting portion of each component, and is screwed and connected by the screw 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、
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。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。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。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
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
μｍ以下が好ましい。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。The pipe 3 is set to have a length of n / 2 · λ (n is a natural number, λ is a wavelength), and
The antinode of the ultrasonic vibration b emitted from the oscillator 1 is determined so as to be located at the boundary between the horn 2 and the pipe 3 as shown in FIG. 3 (A), and the tip t of the pipe 3 becomes the antinode. Therefore, the ultrasonic vibration b can be transmitted to the pipe. A protective film 4 is provided on the surface of the pipe 3, as shown in FIG. The protective film 4 is formed by subjecting the pipe 3 to a heat treatment (aging at 500 ° C. for 6 hours), followed by dipping to form a two-component mixed epoxy adhesive (Alfa Giken Co., Ltd., trade name Arteco F-05) on the surface. It was formed by heating and curing at 80 ° C. for 2 hours. Microscopically observing the surface of the pipe 3 here, there is a defect 5 as shown in FIG. 4, but since the protective film 4 is intended to fill this defect 5, it covers the entire surface of the pipe 3. If it is, it is not always necessary to make the thickness uniform, but since the epoxy adhesive has a strong adhesive force, if it is too thick, the protective film 4
As a result, the expansion and contraction of the pipe 3 made of Ti alloy due to resonance may be suppressed.
μm or less is preferable. Note that FIG. 5 shows a state in which a crack 6 is generated in the pipe 3 due to the stress concentration effect (notch effect) due to the defect 5 existing on the surface of the pipe 3 when the pipe 3 expands and contracts due to resonance. .

【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、
パイプ３には図３（Ｂ）に示すような応力部分ｒが生ず
る。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。In the ultrasonic treatment apparatus of this embodiment, when a drive voltage is applied to the vibrator 1, the ultrasonic vibration b from the vibrator 1 is transmitted to the pipe 3 through the horn 2, and
A stress portion r as shown in FIG. 3 (B) occurs in the pipe 3. At this time, generally, the pipe repeatedly expands and contracts due to resonance and causes a notch effect in the defective portion existing on the pipe surface. However, in the pipe 3 in this embodiment, the protective film 4 is provided on the surface to fill the defect 5. The pipe 3 can be vibrated without causing stress concentration.

【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。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。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。実際に、
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、
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。According to this embodiment, since the protective film 4 is formed on the surface of the pipe 3, stress concentration at the defect 5 is eliminated even if the amplitude is increased, as compared with the conventional one in which the protective film 4 is not provided. It no longer breaks at resonance. Therefore, the amplitude of the tip t of the pipe 3 can be made larger than in the conventional case, and the efficiency of breaking stones and the like can be improved. Furthermore, since the surface of the pipe 3 is covered with the protective film 4, even if the pipe 3 is broken, the broken pipe 3 and the broken pieces of the pipe 3 do not remain in the body and are safe. actually,
Comparing the ultrasonic treatment device of this embodiment with the device of the prior art, when the pipe tip t is vibrated with an amplitude of 300 μm,
In the conventional pipe having no protective film, 9 out of 10 pieces were broken, and 7 of them were taken from the tip side from the broken portion. However, in the pipe 3 of this embodiment, 1 out of 10 pieces is a small diameter pipe connection. Although it was broken at the portion, the protective film 4 prevented the broken tip from falling 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。本実施例は、東燃（株）製ポリシラザン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。また、パイプ３は、β型Ｔｉ合金で
あるＴｉ−１５Ｖ−３Ａｌ−３Ｓｎ−３Ｃｒを用いた。
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
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。その他の構成は実施例１と同様で
ある。Second Embodiment A second embodiment of the present invention will be described below with reference to FIG. This example is a polysilazane PHP manufactured by Tonen Corporation.
A protective film 4 made of an inorganic polymer was provided on the surface of the pipe 3 using S-2. Further, for the pipe 3, Ti-15V-3Al-3Sn-3Cr, which is a β-type Ti alloy, was used.
In forming the protective film 4, polysilazane is applied to the surface of the pipe 3 by dipping, and the temperature is set to 100 ° C. for 10 hours.
After drying for a minute, baking was performed at 400 ° C. for 30 minutes to cover the surface of the pipe 3. Other configurations are the same as those in the first embodiment.

【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。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、
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。According to this embodiment, it is possible to obtain the same operation and effect as those of the first embodiment. Moreover, when the ultrasonic treatment apparatus of the present embodiment using the pipe 3 provided with the protective film 4 is actually vibrated at a tip amplitude of 300 μm, which is equivalent to that of a conventional pipe having the same diameter without the protective film 4, 8 of 10 pipes of the same diameter were broken, and the tip side was taken from the broken portion of 5 of them, but in the pipe 3 of this example, 2 of 10 were broken at the connecting portion of the small diameter pipe. But,
The protective film provided on the surface did not remove the broken tip.

【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。図６に示すように、パイプ１０は、細径部１
０ａと太径部１０ｂとから構成され、細径部１０ａは、
パイプ１０の先端から長さλ／４だけ形成されている。
細径部１０ａと太径部１０ｂの接続部分は、細径部１０
ａの外径をφ1 ，太径部１０ｂの外径をφ2 とした場
合、（φ1 ＋φ2 ）／２の曲率半径を有する曲面に形成
されている。その他の構成は上記実施例１と同様であ
る。[Third Embodiment] FIG. 6 is a sectional view of a pipe according to a third embodiment of the present invention, and FIG. 7 is a diagram showing amplitude and stress generated in the pipe. As shown in FIG. 6, the pipe 10 has a small diameter portion 1
0a and a large diameter portion 10b, and the small diameter portion 10a is
The length of λ / 4 is formed from the tip of the pipe 10.
The connecting portion between the small diameter portion 10a and the large diameter portion 10b is
When the outer diameter of a is φ 1 and the outer diameter of the large-diameter portion 10b is φ 2 , the curved surface has a radius of curvature of (φ 1 + φ 2 ) / 2. Other configurations are the same as those in the first embodiment.

【００１３】本実施例によれば、パイプ１０の細径部１
０ａの断面積をＳ1 （＝２２ｍｍ2）、太径部１０ｂの
断面積をＳ2 （＝１２５ｍｍ2 ）としたとき、太径部１
０ｂから細径部に伝えられる超音波振動は、細径部１０
において、その振動が約Ｓ2／Ｓ1 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。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。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
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。According to this embodiment, the small diameter portion 1 of the pipe 10
When the cross-sectional area of 0a is S 1 (= 22 mm 2 ) and the cross-sectional area of the large-diameter portion 10b is S 2 (= 125 mm 2 ), the large-diameter portion 1
The ultrasonic vibration transmitted from 0b to the small diameter portion 10
In FIG. 7, since the vibration is amplified by about S 2 / S 1 times, the amplitude of the tip of the pipe 10 (the tip of the small diameter portion 10a) can be increased as shown in FIG. 7 (A). Further, at this time, the stress applied to the pipe 10 becomes maximum on the pipe 10 side of the small diameter portion 10a in the connecting portion between the small diameter portion 10a and the large diameter portion 10b, as shown in FIG. 7B. For this reason, when ultrasonic vibration is generated in the pipe 10, there is a possibility that the pipe 10 may be broken only at the portion where the stress is maximum, but since the protective film 4 is provided on the entire surface of the pipe 10,
The defects existing on the surface of No. 0 are filled, and the pipe 10 can be vibrated without breaking like the above-mentioned embodiment.

【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。実際に、パイプ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Ｓ2 ／Ｓ1 （＝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。そして、パイプ１０の先端を上記のように振幅３０
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
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。Therefore, since the amplitude generated at the tip of the pipe 10 (the small diameter portion 10a) can be made larger than the applied amplitude with respect to the amplitude applied to the pipe 10, compared to the case where the pipe having the same diameter is used, It has become possible to effectively treat stones and other factors. In fact, pipe 1
When ultrasonic vibration with an amplitude of 60 μm was applied to 0, the tip of the pipe 10 could be vibrated with a maximum amplitude of 300 μm, which is approximately S 2 / S 1 (= 125/22) times. Then, the tip of the pipe 10 is moved to the amplitude 30 as described above.
When 10 pipes were oscillated at 0 μm, there was no broken pipe, but it was 10 with a pipe of the same diameter without the conventional protective film.
Nine of them were broken, and seven of them were taken from the broken part.

【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。In each of the above embodiments, the case where Ti-15V-3Al-3Sn-3Cr is used as the pipe material is shown. It is not limited to the materials mentioned in the examples.

【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。中でも、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。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。However, even if the yield strength is high, it is desirable to use a material having a Young's modulus as low as possible in order to increase the amplitude, and α + β type titanium alloy and β type titanium alloy in Table 1 are optimal. Among them, Ti-15V-3Al-3
Sn-3Cr is the most excellent material at present because it is long and capable of pipe processing with stable quality, and is also used in this embodiment. Further, the material of the protective layer made of polymer is not limited to the material as long as it can surely adhere to the surface of the pipe.

【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。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。As described above, according to the present invention, since the surface of the vibration transmitting member is covered with the protective film, the protective film enters into the defective portion existing on the surface of the vibration transmitting member, and stress concentration at the defective portion. Can be alleviated, and the fatigue strength of the vibration transmitting member can be improved. Further, even when a crack is generated in the vibration member, the surface of the vibration transmission member is covered with the protective film made of polymer, so that the broken portion of the vibration transmission member does not drop off or generate fragments.

【図面の簡単な説明】[Brief description of 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。FIG. 1 is a cross-sectional view showing a pipe of an ultrasonic treatment device according to a 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。FIG. 2 is a front view showing the ultrasonic treatment device according to 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。FIG. 3 is a diagram showing the amplitude and stress generated in the pipe of the ultrasonic treatment apparatus in the first embodiment of the present invention.

【図４】図１におけるＣ部の拡大断面図である。FIG. 4 is an enlarged sectional view of a 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。FIG. 5 is a cross-sectional view of a pipe showing a state of cracks 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。FIG. 6 is a cross-sectional view showing a pipe of an ultrasonic treatment device according to a 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。FIG. 7 is a diagram showing amplitude and stress generated in a pipe in Example 3 of the present invention.

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

【符号の説明】[Explanation 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】[Claims] 【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）
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。1. A horn for amplifying energy generated by an ultrasonic transducer, and n / 2 · λ (n is a natural number, λ is a wavelength)
In a ultrasonic treatment device having a vibration transmission member which is set to a length that satisfies the above and a connection portion with the horn is joined so as to form an antinode of ultrasonic vibration, an organic polymer or an inorganic material is formed on the surface of the vibration transmission member. An ultrasonic treatment device comprising a protective film made of a polymer.
JP17218593A 1992-06-26 1993-06-18 Ultrasonic treatment equipment Expired - Fee Related JP3386517B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17218593A JP3386517B2 (en) 1992-06-26 1993-06-18 Ultrasonic treatment equipment

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP19342392 1992-06-26
JP4-193423 1992-06-26
JP17218593A JP3386517B2 (en) 1992-06-26 1993-06-18 Ultrasonic treatment equipment

Publications (2)

Publication Number Publication Date
JPH0670938A true JPH0670938A (en) 1994-03-15
JP3386517B2 JP3386517B2 (en) 2003-03-17

Family

ID=26494633

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP3386517B2 (en)

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