JPH02261576A - 磁気ひずみ変換器 - Google Patents

磁気ひずみ変換器

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Publication number
JPH02261576A
JPH02261576A JP1329366A JP32936689A JPH02261576A JP H02261576 A JPH02261576 A JP H02261576A JP 1329366 A JP1329366 A JP 1329366A JP 32936689 A JP32936689 A JP 32936689A JP H02261576 A JPH02261576 A JP H02261576A
Authority
JP
Japan
Prior art keywords
transducer
strips
strip
magnetostrictive
arm
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
JP1329366A
Other languages
English (en)
Other versions
JPH0632784B2 (ja
Inventor
Alan Broadwin
アラン・ブロードウイン
Leonard M Emery
レナード・メラデイス・エマリ
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.)
Valleylab Inc
Original Assignee
Valleylab Inc
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 Valleylab Inc filed Critical Valleylab Inc
Publication of JPH02261576A publication Critical patent/JPH02261576A/ja
Publication of JPH0632784B2 publication Critical patent/JPH0632784B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/007—Methods or devices for eye surgery
    • A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
    • A61F9/00745—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments using mechanical vibrations, e.g. ultrasonic
    • 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
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/08—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction
    • B06B1/085—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction using multiple elements, e.g. arrays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N35/00—Magnetostrictive devices

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  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Veterinary Medicine (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Surgical Instruments (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Paper (AREA)
  • Non-Reversible Transmitting Devices (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Thermistors And Varistors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 本発明は、磁気ひずみ変換器、特に超音波共振振動器（
ｕｌｔｒａｓｏｎｉｃ　ｒｅｓｏｎａｎｔ　ｖｉｂｒａ
ｔｏｒ）、なかでも外科用ハンドピース（ｈａｎｄｐｉ
ｅｃｅ）における超音波共振振動器に使用するように改
良された構成の磁気ひずみ変換器に関する。
超音波共振振動器を組み入れた装置は外科用途、特に組
織を分解する（ｆｒａＢｅｎｔｉｎｇ）ためのツールを
備えた外科用ハンドピースの分野では公知である。かか
る装置において必要とされる超音波振動は、連結部材を
通して適当なツールに伝送される磁気ひずみ手段によっ
て生成することができる。
このような装置の代表的な例は米国特許筒４．２２３，
６７６号明細書に記載されており、前記特許は参照によ
り本明細書に包含するものとする。米国特許筒４，２２
３，６７６号明細書に記載の装置においては磁気ひずみ
変換器は、米国特許筒ＲＥ　２５，０３３号明細書に教
示されているようなニッケル合金のサンドイッチからな
る磁気ひずみ積重ね体である。
前記積重ね体は、成層構造を形成する磁気ひずみ材料、
即ちニッケル合金でできた複数の細長いストリップから
なる。成層構造は、うず電流による悪影響、例えばエネ
ルギ損失を小さくするために必要である。
後に改良された態様では成層積重ね体は、剛性を与える
ために浅く湾曲した断面を備えて製造された。
適当に機能するためには成層変換器は好ましくは、 １、機械的に頑丈であるべきであり、 ２、音響損失が最小であり、 ３、作動環境とは別に、取り扱いが比較的容易であるべ
きである。
上記変換器は、外科処置におけるその使用に有効で且つ
極めて便利であることが立証されているが、高性能であ
るにもかかわらず依然としである種の欠点を有する０例
えば、平坦な成層構造は、何等かの理由で冷却水の流れ
が低減すると過熱し易く、かかる加熱が装置に深刻な損
傷を与える結果となることがある。更に平坦な構造は１
つの平面においてのみ機械的頑丈さを与える。このよう
な全体的な剛性での欠如は誤操作による機械的損傷をも
たらし得、成層体が分離したり折れ曲がったりすると装
置全体が役にたたなくなり得る。
変換器を、半径方向に延伸するフィンの形態に配置され
た細長いストリップを具備する実質的に剛性の柱状体の
形態に製造すると、上記欠点が解消されることが判った
。
本発明は、磁気ひずみ材料でできた複数の細長いストリ
ップを備えた磁気ひずみ変換器であって、前記ストリッ
プの各々が、遠位端部及び近位端部を有しており、且つ
中央軸を有しこの軸に関して半径方向に延伸するフィン
を備えた実質的に剛性の一体的柱状体を形成するために
、隣接するストリップに前記両端部で取り付けられてい
る磁気ひずみ変換器を提供する。
変換器の細長いストリップの各々は実質的にＶ字形横断
面を有しており、その７字形の各アームがストリップの
長手方向長さにわたり形成されているのが好ましい、か
かる好ましい実施態様においては、各ストリップの両端
部のそれぞれ隣接するストリップへの取り付けがろう接
または溶接によって行われている。
本発明の特に好ましい実施態様は、各Ｖ字形ストリップ
の各アームが、半径方向に延伸するフィンを形成するた
めに該ストリップの長手方向長さ全体に沿って直ぐ隣の
ストリップのアームと接触しており、得られたフィンが
、得られた実質的に剛性の柱状体の長さにわたって延伸
する中央孔の周囲に放射状パターンを形成する上記変換
器である。
更に本発明は、超音波振動変換器と、外科ツールと、前
記変換器を前記外科ツールに連結する連結部品とを具備
しており、前記変換器が上記の磁気ひずみ変換器である
超音波共振振動器を提供する。
前記磁気ひずみ変換器はその長さに沿って延伸する中央
孔を有しており、前記孔は、流体を輸送するための管を
収容するのに充分に大きい直径を有するのが好ましい。
従来技術の通常の成層積重ね体と比較し、本発明の変換
器は、中央軸を有し且つこの軸に関して半径方向に延伸
するフィンを有し、実質的に剛性の柱状の形態であり、
好ましくは実質的に円形の横断面である。前記フィンは
、その遠位端部及び近位端部で相互に好ましくはろう接
または溶接によって取り付けられた磁気ひずみ材料、例
えば適当な酸化物被覆を有するニッケル合金の細長いス
トリップによって形成されている。好ましい実施態様に
おいては、細長いストリップの各々は実質的に７字形の
横断面を有しており、前記柱状体は、ストリップのアー
ムの一方が直ぐ隣のストリップのアームに、接触してい
るストリップが該柱状体の長さにわたって延伸する中央
孔の周囲に放射状パターンのフィンを形成するように、
その長手方向長さ全体に沿って接触するように各ストリ
ップを整列させることにより形成される。得られる楕遺
体は、従来技術の成層積重ね体よりも頑丈な実質的に剛
性の柱状体であり、更にフィンの構成は、放射熱損失を
容易にし、それによって正常の冷却手段が故障しなとし
ても過熱する可能性を小さくする複数の自由表面を提供
する。
長手方向ストリップについては■字形横断面が特に好ま
しいが、任意の鉦の適当な横断面を有するストリップを
使用することもできる。７字形は、個々のストリップの
製造が容易であり且つかかるストリップを複数使用して
柱状構造を組み立てるのが簡単であるが故に特に適して
いる。使用するストリップの数とバッキングの密度（ｃ
　１ｏｓｅｎｅｓｓ）に応じて、ストリップをその両端
で相互に取り付けして形成された柱状体は通常その長さ
に沿って延伸する中央孔を有し、所望であれば、この孔
の直径は、吸引または潅注流体を輸送するための管を収
容するのに充分大きくすることができる。
本発明の好ましい変換器は特に、連結部品を介して超音
波振動変換器に連結された外科ツールを包含する超音波
共振振動器を具備する外科用ハンドピースに使用される
ようになっている。かかる装置においては、本発明の磁
気ひずみ変換器の一端は超音波振動を増幅する連結部品
の近位端部に連結されており、前記連結部品の遠位端部
は外科ツールの近位端部に取り付けられている。外科ツ
ールの構成及び質量は、ツールを例えば組織分解に適す
るようにする更なる増幅が得られるようなものとする。
典型的な外科用ハンドピースは特許第４．２２３．６７
６号明細書に記載されている。
本発明を、添付の図面に示した従来技術の変換器及び本
発明の好ましい実施態様を参照し、より詳細に説明する
。
Ｘｌ贋 第１図〜第３図に示した典型的な従来技術の成層積重ね
体１０は、並べて積み重ねられ且つそれらの端部を連結
部材１２．１３によって取り付けられた実質的に平坦な
複数のストリップ１１を備えている。
第２図に示したように、積重ね体の剛性を増強するため
に、それ以外の場合では平坦なストリップに浅い湾曲の
断面を与えてもよい。成層変換器は、適当なねじ山付き
コネクタ１４または他の適当な取り付は装置によって適
当な連結部品に連結されるようになっている。
本発明の好ましい実施態様を第４図から第６図に示す、
この実施態様は、磁気ひずみ材料でできておりそれぞれ
が実質的にＶ字形の横断面を有する複数の、例えば１６
〜３５、好ましくは１８個の細長いストリップで形成さ
れた円柱３０を具備している。
磁気ひずみ材料は酸化物被覆を備えたニッケル合金であ
るのが好ましい。
各７字形のアーム３１は隣接する■字形ストリップのア
ームと接触している。典型的にはアーム間の間隙３２は
、好ましくは１１〜２１°の角度で定義される。細長い
ストリップの各々の長さは、磁気ひずみ源に使用される
電流の波長によって決定される。即ち、変換器の長さは
、その中心が節点に位置するように半波長の整数倍に等
しくなくてはならない。約２２〜２７　Ｋ　ｔｌ　ｚの
周波数で動作する共振振動器に対しては、変換器の長さ
、即ち変換器を構成するストリップの各々の長さは約４
インチ（約１００Ｉ１１）である。各ストリップの厚さ
は約０．００７〜ｏ、ｏｔｏインチ（０，ＯＬ８〜０゜
０２５ｃｍ）である。
細長いストリップは、その近位端部３３及び遠位端部３
４で相互に取り付けられる。この取り付けはろう接また
は溶接によって行われるのが好ましい。
各端部は中実部材として模式的に示したが、得られた円
柱が所望の剛性及び頑丈さを有するならば、取り付けは
、図のような中実部材または各々隣合ったストリップ端
部間の結合によって形成される開放構造のいずれによっ
て行なってもよい。
この円柱の遠位端部には、変換器を他の被動装置に連結
するための適当なコネクタ３５、例えば以下に説明する
ような外科ツールが更に装着される連結部品が取り付け
られる。
第７図は、連結部品３７に連結された本発明の変換器３
０と外科ツール３８とを備えた超音波共振振動器を模式
的に示す。
第５図に示したように、好ましい実施態様は中央孔３６
を包含することができる。この孔３６の直径は、装置の
他の操作部材、例えば吸引または潅注流体を輸送するた
めの管を収容するために変化させることができる。
第４図から第６図に示した実施態様は、従来技術におい
て公知のいかなる成層変換器よりも高い剛性及び頑丈さ
を有しており、更に、従来技術の装置に付随する過熱問
題を削減または完全に解消する構成を有する。即ち、本
発明の変換器を包含する外科用ハンドピースを冷却せず
に５〜７分間稼働させるテストにおいて、変換器を収り
外すと変換器は暖められてはいたが、冷却しない場合の
通常の積重ね体はど熱くはないことが判った。
更に、本発明の変換器を包含するハンドピースが必要と
する作動電力はより少ないことが判り、これは、本発明
の変換器が従来技術の通常の変換器積重ね体よりも効率
的であることを示唆している。
【図面の簡単な説明】
第１図は従来技術の成層積重ね体の側面図、第２図は第
１図のライン２−２における横断面図、第３図は従来技
術の積重ね体の単一のストリップの拡大横断面図、第４
図は本発明のフィン付き変換器の側面図、第５図は第４
図のライン５−５における横断面図、第６図は第４図の
変換器に使用されるＶ字形の細長いストリップの拡大横
断面図、第７図は本発明の変換器を取り込んだ超音波共
振振動器の側面図である。 １０・・・成層積重ね体、１１・・・平坦なストリップ
、１２゜１３・・・連結部材、１４，３５，３フ・・・
連結部品、３０・・・変換器、３１・・・アーム、３２
・・・アーム間隙、３６・・・中央孔、３８．・・・外
科ツール。 図面の浄書（内容に変更なし）

Claims (6)

    【特許請求の範囲】
  1. （１）磁気ひずみ材料でできた複数の細長いストリップ
    を備えた磁気ひずみ変換器であつて、前記ストリップの
    各々が、遠位端部及び近位端部を有しており且つ、中央
    軸を有しこの軸に関して半径方向に延伸するフィンを備
    えた実質的に剛性の一体的柱状体を形成するために、隣
    接するストリップに前記両端部で取り付けられている磁
    気ひずみ変換器。
  2. （２）前記細長いストリップの各々が実質的にＶ字形横
    断面を有しており、そのＶ字形の各アームがストリップ
    の長手方向長さにわたり形成されている請求項１に記載
    の変換器。
  3. （３）前記ストリップの各々の両端部のそれぞれ隣接す
    るストリップへの取り付けがろう付けまたは溶接によっ
    て行われている請求項２に記載の変換器。
  4. （４）前記Ｖ字形のストリップのそれぞれの各アームが
    、半径方向に延伸するフィンを形成するために該ストリ
    ップの長手方向長さ全体に沿って直ぐ隣のストリップの
    アームと接触しており、得られたフィンが、得られた実
    質的に剛性の柱状体の長さにわって延伸する中央孔の周
    囲に放射状パターンを形成する請求項２に記載の変換器
    。
  5. （５）超音波振動変換器と、外科ツールと、前記変換器
    を前記外科ツールに連結する連結部品とを具備しており
    、前記超音波振動変換器が請求項１に記載の磁気ひずみ
    変換器である超音波共振振動器。
  6. （６）前記磁気ひずみ変換器がその長さに沿って延伸す
    る中央孔を有しており、前記孔が、流体を輸送するため
    の管を収容するのに充分に大きい直径を有する請求項５
    に記載の振動器。
JP1329366A 1988-12-20 1989-12-19 磁気ひずみ変換器 Expired - Fee Related JPH0632784B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US287748 1988-12-20
US07/287,748 US4986808A (en) 1988-12-20 1988-12-20 Magnetostrictive transducer

Publications (2)

Publication Number Publication Date
JPH02261576A true JPH02261576A (ja) 1990-10-24
JPH0632784B2 JPH0632784B2 (ja) 1994-05-02

Family

ID=23104164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1329366A Expired - Fee Related JPH0632784B2 (ja) 1988-12-20 1989-12-19 磁気ひずみ変換器

Country Status (11)

Country Link
US (1) US4986808A (ja)
EP (1) EP0375302B1 (ja)
JP (1) JPH0632784B2 (ja)
AT (1) ATE113458T1 (ja)
AU (1) AU610030B2 (ja)
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CA2005878C (en) 1993-08-17
US4986808A (en) 1991-01-22
FI896088A0 (fi) 1989-12-19
NO895117L (no) 1990-06-21
DE68919197T2 (de) 1995-03-23
FI96824C (fi) 1996-09-10
NO895117D0 (no) 1989-12-19
AU4701889A (en) 1990-07-19
DE68919197D1 (de) 1994-12-08
EP0375302B1 (en) 1994-11-02
ATE113458T1 (de) 1994-11-15
FI96824B (fi) 1996-05-31
AU610030B2 (en) 1991-05-09
NO178015C (no) 1996-01-10
ES2062046T3 (es) 1994-12-16
CA2005878A1 (en) 1990-06-20
NO178015B (no) 1995-10-02
DK646689A (da) 1990-06-21
JPH0632784B2 (ja) 1994-05-02
EP0375302A1 (en) 1990-06-27
DK646689D0 (da) 1989-12-19

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