JP2004065745A - Hardness variable sheath adapter and hardness variable device of endoscope - Google Patents

Hardness variable sheath adapter and hardness variable device of endoscope Download PDF

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Publication number
JP2004065745A
JP2004065745A JP2002231242A JP2002231242A JP2004065745A JP 2004065745 A JP2004065745 A JP 2004065745A JP 2002231242 A JP2002231242 A JP 2002231242A JP 2002231242 A JP2002231242 A JP 2002231242A JP 2004065745 A JP2004065745 A JP 2004065745A
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hardness
endoscope
annular
compression
coil spring
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JP4172966B2 (en
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Hideto Kurosawa
黒澤　秀人
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Pentax Corp
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Pentax Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/00078—Insertion part of the endoscope body with stiffening means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00131—Accessories for endoscopes
    • A61B1/00135—Oversleeves mounted on the endoscope prior to insertion

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a hardness variable sheath adapter of an endoscope which can be attached to or detached from an existing endoscope without impairing handleability of an internal channel and to obtain a hardness variable device of the endoscope. <P>SOLUTION: The hardness variable sheath adapter or the hardness variable device includes an inner tube disposed along an outer peripheral surface of an insertion part extended from an operation part of the endoscope; an outer tube which forms an annular coil inserting space with the inner tube and the outer tube; a compression coiled spring inserted into the annular coil inserting space; and a compression rate regulating mechanism for changing the compression rate of the compression coiled spring. The hardness variable device is provided. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【技術分野】
本発明は、既存の内視鏡に着脱して用いることができる硬度可変シースアダプタ及び内視鏡の硬度可変装置に関する。
【０００２】
【従来技術およびその問題点】
医療現場では、内視鏡の挿入部の硬度を変化させたいという要求がある。この要求に応えるため、挿入部内に硬度可変機構を内蔵するタイプの内視鏡や、鉗子などの処置具挿通用のチャンネルに硬度可変部材を挿入するタイプの硬度可変装置が提案されている。しかし、前者の内蔵タイプでは、個々の内視鏡に硬度可変機構を設けるためコスト高になってしまい、後者のチャンネル挿通タイプでは、硬度可変部材の挿入時に、チャンネルが本来の目的で使用できなくなる（しにくくなる）という問題があった。
【０００３】
【発明の目的】
本発明は、既存の内視鏡にも使用可能であり、内部チャンネルの使い勝手を損なうことのない、内視鏡の硬度可変シースアダプタ及び硬度可変装置を得ることを目的とする。
【０００４】
【発明の概要】
本発明の硬度可変シースアダプタ及び硬度可変装置は、内視鏡の操作部から延びる挿入部の外周面に沿う内管と；この内管との間に環状コイル挿入空間を形成する外管と；この環状コイル挿入空間内に挿入された圧縮コイルばねと；この圧縮コイルばねの圧縮度を変化させる圧縮度調整機構と；を有することを特徴としている。
【０００５】
圧縮コイルばねの圧縮度調整機構は、上記環状コイル挿入空間に連通させて操作部側の端部に形成された環状空間と、この環状空間に直進進退動可能に支持され、その先端部が圧縮コイルバネに当接する移動環と、この移動環に螺合され環状空間から突出させて軸方向移動を規制し回動操作可能に支持された硬度調整リングとで構成するとよい。
【０００６】
【発明の実施形態】
図１ないし図３は、本発明の一実施形態である硬度可変シースアダプタ１０を示している。硬度可変シースアダプタ１０は、可撓性を有する硬度可変管部１１と、その基部に接続する硬度操作部１２とを有している。
【０００７】
硬度可変管部１１は、外筒１１ａと内筒１１ｂの間に環状の環状コイル挿入空間１１ｃが形成され、この環状コイル挿入空間１１ｃの前方は先端キャップ１１ｄによって塞がれている。外筒１１ａ及び内筒１１ｂは、ポリウレタンなど可撓性のある材質で形成されている。環状コイル挿入空間１１ｃ内には圧縮コイルばね１５が挿入されている。圧縮コイルばね１５は、自由状態で外筒１１ａ及び内筒１１ｂと略同心の直線筒状をなしている。
【０００８】
硬度操作部１２は、外筒１６ａと内筒１６ｂからなるシリンダ部材１６を有し、この外筒１６ａと内筒１６ｂの間の環状空間１６ｃが、環状コイル挿入空間１１ｃに連通している。より具体的には、硬度可変管部１１の外筒１１ａの終端部は、シリンダ部材１６の外筒１６ａの外周面に固定され、内筒１１ｂの終端部は、内筒１６ｂの内周面に固定されている。硬度可変管部１１とシリンダ部材１６のそれぞれの内筒１１ｂ、１６ｂの内径サイズは同じであり、これらの内筒１１ｂ、１６ｂの内側に一連の内視鏡挿通空間１９が形成されている。
【０００９】
環状空間１６ｃには、スライダ（移動環）１７が軸線方向に直進進退可能に挿入されている。スライダ１７は、該直進進退方向への直線溝１７ａを有し、この直線溝１７ａに対して、シリンダ部材１６の外筒１６ａの内周面に突設した直進ガイド突起１６ｄが係合しており、この直線溝１７ａと直進ガイド突起１６ｄの係合によって、スライダ１７は直進案内される。スライダ１７の外周面にはさらにねじ部１７ｂが形成され、ねじ１７ｂは、硬度調整リング１８の内周面に形成したねじ部１８ａと螺合している。シリンダ部材１６の外筒１６ａには、このねじ部１７ｂ、１８ａの螺合を可能にさせる環状貫通穴１６ｅが形成され、硬度調整リング１８は、該環状貫通穴１６ｅに嵌まることで軸方向移動が規制され、シリンダ部材１６の軸線を中心として回動可能に支持されている。
【００１０】
スライダ１７の先端押圧部１７ｃは、環状コイル挿入空間１１ｃ内に挿入されて圧縮コイルばね１５の一端部に当接している。圧縮コイルばね１５の他端部は、先端キャップ１１ｄに当接して移動規制されている。
【００１１】
以上の硬度可変シースアダプタ１０では、硬度調整リング１８を回動させると、直線溝１７ａと直進ガイド突起１６ｄによって直進案内されているスライダ１７が、ねじ部１７ｂ、１８ａに従って、シリンダ部材１６の軸方向に移動する。例えば、図１の状態で硬度調整リング１８を所定方向に回動させると、図２のように、環状コイル挿入空間１１ｃへの挿入方向（図の左方）にスライダ１７が移動し、硬度調整リング１８を逆方向に回動させると、図３のように、環状コイル挿入空間１１ｃから退避する方向（図の右方）にスライダ１７が移動する。図２の状態では、環状コイル挿入空間１１ｃ内への先端押圧部１７ｃの挿入量が増大するので、圧縮コイルばね１５が圧縮され、図３の状態では逆に、先端押圧部１７ｃが退避するため、復元力によって圧縮コイルばね１５が伸びる。圧縮コイルばね１５は圧縮されると曲がりにくく（硬く）なり、伸びて自由状態に近づくほど曲がりやすく（柔らかく）なる特性を有しているため、硬度調整リング１８を適宜操作することにより、硬度可変管部１１の曲げ剛性（可撓性）を任意に変化させることができる。
【００１２】
図４は、硬度可変シースアダプタ１０の使用状態を示している。同図に示す内視鏡２０は、体腔内に挿入される挿入部２１とその基部側に接続された操作部２２を有している。挿入部２１は、先端側から順に、湾曲部２３と可撓管部２４を有しており、さらに可撓管部２４が連結部２５を介して操作部２２に接続している。
【００１３】
操作部２２からはユニバーサルチューブ２６が延設され、ユニバーサルチューブ２６の先端には、画像処理装置や光源等を有する外部のビデオプロセッサに対して着脱可能なコネクタ部２７が設けられている。挿入部２１の先端部には図示しない対物レンズや撮像素子が設けられており、これらによって得られる映像信号は、ビデオプロセッサに送られて電子画像として表示または記録される。また、挿入部２１の先端部に設けた配光レンズには、ビデオプロセッサ側の光源からライトガイドファイババンドルを介して照明光が送られる。挿入部２１内にはその他にも、流体流通や処置具の挿通に用いられるチャンネル（チューブ）など、様々な内蔵物が設けられている。
【００１４】
挿入部２１のうち、可撓管部２４は可撓性を有している。また、湾曲部２３内には、多数の筒状をなす湾曲セグメント（不図示）が長手方向へ向けて整列状態で設けられており、各湾曲セグメントはリベットで順次枢着されている。湾曲セグメントと操作部２２に設けた湾曲操作ノブ２９とは、図示しない湾曲操作ワイヤを介して接続されており、湾曲操作ノブ２９を回動させることにより、各湾曲セグメントがリベットを中心として揺動し、湾曲部２３が湾曲される。
【００１５】
図１ないし図３に示すように、硬度可変シースアダプタ１０の内視鏡挿通空間１９は、内視鏡２０の挿入部２１を挿通可能な内径サイズを有している。硬度可変シースアダプタ１０を使用するときには、図４に示すように、湾曲部２３が硬度可変管部１１の先端から突出するまで、内視鏡２０の挿入部２１を内視鏡挿通空間１９へ挿入していく。すると、硬度可変シースアダプタ１０が可撓管部２４の略全体を覆う状態となる。この状態で硬度調整リング１８を適宜回動させると、前述した硬度可変シースアダプタ１０の構造によって圧縮コイルばね１５の圧縮度が変化し、その結果、可撓管部２４を覆う硬度可変管部１１の曲げ剛性が変化して可撓管部２４に所望の硬さを付与することができる。
【００１６】
以上のように、本実施形態の硬度可変装置では、内視鏡の挿入部の硬度を、その外周面に沿う硬度可変シースアダプタ１０によって変化させるものとしたので、硬度可変機構を内蔵しない既存のタイプの内視鏡に使用することができ、コスト的に有利である。また、硬度可変シースアダプタ１０は、使用に際して内視鏡２０に内蔵された各種チャンネルを使用しないため、各種チャンネルの性能に影響を与えるおそれもない。
【００１７】
【発明の効果】
以上のように本発明によれば、既存の内視鏡に着脱して用いることが可能で、内部チャンネルの使い勝手を損なうこともない、内視鏡の硬度可変シースアダプタ及び硬度可変装置を得ることができる。
【図面の簡単な説明】
【図１】本発明による硬度可変シースアダプタの一実施形態を示す断面図である。
【図２】図１の硬度可変シースアダプタで、圧縮コイルばねの圧縮度を高めた状態を示す断面図である。
【図３】図１の硬度可変シースアダプタで、圧縮コイルばねの圧縮度を低くした状態を示す断面図である。
【図４】図１ないし図３の硬度可変シースアダプタを内視鏡に装着した使用状態の外観図である。
【符号の説明】
１０　硬度可変シースアダプタ
１１　硬度可変管部
１１ａ　外筒
１１ｂ　内筒
１１ｃ　環状コイル挿入空間
１１ｄ　先端キャップ
１２　硬度操作部
１５　圧縮コイルばね
１６　シリンダ部材
１６ａ　外筒
１６ｂ　内筒
１６ｃ　環状空間
１６ｄ　直進ガイド突起
１６ｅ　環状貫通穴
１７　スライダ（移動環）
１７ａ　直線溝
１７ｂ　ねじ部
１７ｃ　先端押圧部
１８　硬度調整リング
１８ａ　ねじ部
１９　内視鏡挿通空間
２０　内視鏡
２１　挿入部
２２　操作部
２３　湾曲部
２４　可撓管部[0001]
【Technical field】
The present invention relates to a variable hardness sheath adapter and a variable hardness device for an endoscope that can be used by attaching to and detaching from an existing endoscope.
[0002]
[Prior art and its problems]
In the medical field, there is a demand to change the hardness of the insertion portion of the endoscope. In order to meet this demand, there have been proposed an endoscope having a built-in hardness changing mechanism in an insertion portion, and a hardness changing device having a hardness changing member inserted into a channel for inserting a treatment tool such as forceps. However, in the former built-in type, the cost is increased because a variable hardness mechanism is provided in each endoscope, and in the latter channel insertion type, the channel cannot be used for its intended purpose when the variable hardness member is inserted. (It becomes difficult).
[0003]
[Object of the invention]
An object of the present invention is to provide a variable hardness sheath adapter and a variable hardness device for an endoscope that can be used for an existing endoscope and do not impair the usability of the internal channel.
[0004]
Summary of the Invention
The variable hardness sheath adapter and the variable hardness device of the present invention include: an inner tube along an outer peripheral surface of an insertion portion extending from an operation unit of an endoscope; an outer tube forming an annular coil insertion space between the inner tube and the inner tube; A compression coil spring inserted into the annular coil insertion space; and a compression degree adjusting mechanism for changing the compression degree of the compression coil spring.
[0005]
The compression degree adjusting mechanism of the compression coil spring communicates with the annular coil insertion space, and is supported at the annular space formed at the end on the operation portion side so as to be able to move straight forward and backward, and the distal end thereof is compressed. The moving ring may be configured to include a moving ring that comes into contact with the coil spring, and a hardness adjusting ring that is screwed to the moving ring and protrudes from the annular space to regulate axial movement and is supported so as to be rotatable.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show a variable hardness sheath adapter 10 according to one embodiment of the present invention. The variable hardness sheath adapter 10 has a variable hardness tube section 11 having flexibility and a hardness operation section 12 connected to a base thereof.
[0007]
In the variable hardness tube portion 11, an annular annular coil insertion space 11c is formed between the outer cylinder 11a and the inner cylinder 11b, and the front of the annular coil insertion space 11c is closed by a tip cap 11d. The outer cylinder 11a and the inner cylinder 11b are formed of a flexible material such as polyurethane. A compression coil spring 15 is inserted into the annular coil insertion space 11c. The compression coil spring 15 has a straight cylindrical shape which is substantially concentric with the outer cylinder 11a and the inner cylinder 11b in a free state.
[0008]
The hardness operation section 12 has a cylinder member 16 composed of an outer cylinder 16a and an inner cylinder 16b, and an annular space 16c between the outer cylinder 16a and the inner cylinder 16b communicates with the annular coil insertion space 11c. More specifically, the terminal end of the outer cylinder 11a of the variable hardness tube portion 11 is fixed to the outer peripheral surface of the outer cylinder 16a of the cylinder member 16, and the terminal end of the inner cylinder 11b is connected to the inner peripheral surface of the inner cylinder 16b. Fixed. The inner diameters of the inner cylinders 11b and 16b of the variable hardness pipe 11 and the cylinder member 16 are the same, and a series of endoscope insertion spaces 19 are formed inside the inner cylinders 11b and 16b.
[0009]
A slider (moving ring) 17 is inserted into the annular space 16c so as to be able to advance and retreat in the axial direction. The slider 17 has a linear groove 17a extending in the rectilinear advance / retreat direction. A linear guide protrusion 16d protruding from the inner peripheral surface of the outer cylinder 16a of the cylinder member 16 is engaged with the linear groove 17a. The slider 17 is guided linearly by the engagement between the linear groove 17a and the linear guide projection 16d. A screw portion 17 b is further formed on the outer peripheral surface of the slider 17, and the screw 17 b is screwed with a screw portion 18 a formed on the inner peripheral surface of the hardness adjusting ring 18. An annular through hole 16e is formed in the outer cylinder 16a of the cylinder member 16 so that the screw portions 17b and 18a can be screwed together. The hardness adjusting ring 18 is axially moved by fitting into the annular through hole 16e. Are supported, and are rotatably supported about the axis of the cylinder member 16.
[0010]
The distal end pressing portion 17c of the slider 17 is inserted into the annular coil insertion space 11c and is in contact with one end of the compression coil spring 15. The other end of the compression coil spring 15 abuts on the tip cap 11d and is restricted from moving.
[0011]
In the above-described hardness variable sheath adapter 10, when the hardness adjusting ring 18 is rotated, the slider 17 guided linearly by the linear groove 17a and the linear guide protrusion 16d is moved in the axial direction of the cylinder member 16 according to the threaded portions 17b and 18a. Go to For example, when the hardness adjustment ring 18 is rotated in a predetermined direction in the state of FIG. 1, the slider 17 moves in the insertion direction (left side in the figure) into the annular coil insertion space 11c as shown in FIG. When the ring 18 is rotated in the opposite direction, as shown in FIG. 3, the slider 17 moves in a direction to retract from the annular coil insertion space 11c (to the right in the figure). In the state of FIG. 2, since the insertion amount of the distal end pressing portion 17c into the annular coil insertion space 11c increases, the compression coil spring 15 is compressed. In the state of FIG. 3, on the contrary, the distal end pressing portion 17c retracts. The compression coil spring 15 is extended by the restoring force. The compression coil spring 15 has a characteristic that it is hard to bend (harden) when compressed, and has a characteristic that it is easy to bend (soften) as it expands and approaches a free state. The bending rigidity (flexibility) of the tube portion 11 can be changed arbitrarily.
[0012]
FIG. 4 shows a usage state of the variable hardness sheath adapter 10. An endoscope 20 shown in FIG. 1 has an insertion section 21 inserted into a body cavity and an operation section 22 connected to a base side thereof. The insertion portion 21 has a bending portion 23 and a flexible tube portion 24 in this order from the distal end side, and the flexible tube portion 24 is further connected to the operation portion 22 via the connection portion 25.
[0013]
A universal tube 26 extends from the operation unit 22, and a connector 27 that can be attached to and detached from an external video processor having an image processing device and a light source is provided at the tip of the universal tube 26. A not-shown objective lens and an image pickup device are provided at the distal end of the insertion section 21, and a video signal obtained by these is sent to a video processor and displayed or recorded as an electronic image. In addition, illumination light is sent from a light source on the video processor side to a light distribution lens provided at a distal end portion of the insertion portion 21 via a light guide fiber bundle. In addition, various built-in components such as a channel (tube) used for fluid distribution and insertion of a treatment tool are provided in the insertion portion 21.
[0014]
The flexible tube portion 24 of the insertion portion 21 has flexibility. Further, a large number of cylindrical curved segments (not shown) are provided in the curved portion 23 in a state of being aligned in the longitudinal direction, and the curved segments are sequentially pivoted by rivets. The bending segments and the bending operation knob 29 provided on the operation section 22 are connected via a bending operation wire (not shown), and by rotating the bending operation knob 29, each bending segment swings around the rivet. Then, the bending portion 23 is bent.
[0015]
As shown in FIGS. 1 to 3, the endoscope insertion space 19 of the variable hardness sheath adapter 10 has an inner diameter size that allows the insertion portion 21 of the endoscope 20 to be inserted. When using the variable hardness sheath adapter 10, as shown in FIG. 4, the insertion portion 21 of the endoscope 20 is inserted into the endoscope insertion space 19 until the bending portion 23 projects from the tip of the variable hardness tube portion 11. I will do it. Then, the variable hardness sheath adapter 10 is in a state of covering substantially the entirety of the flexible tube portion 24. When the hardness adjusting ring 18 is appropriately rotated in this state, the degree of compression of the compression coil spring 15 changes due to the structure of the variable hardness sheath adapter 10 described above. Of the flexible tube 24 can be changed to give a desired hardness to the flexible tube portion 24.
[0016]
As described above, in the variable hardness device according to the present embodiment, the hardness of the insertion portion of the endoscope is changed by the variable hardness sheath adapter 10 along the outer peripheral surface. It can be used for a type of endoscope, and is cost-effective. Further, since the variable hardness sheath adapter 10 does not use various channels built in the endoscope 20 at the time of use, there is no possibility of affecting the performance of various channels.
[0017]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain a variable hardness sheath adapter and a variable hardness device of an endoscope that can be used by being detachably attached to an existing endoscope and that does not impair the usability of the internal channel. Can be.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing one embodiment of a variable hardness sheath adapter according to the present invention.
FIG. 2 is a cross-sectional view showing a state where the degree of compression of a compression coil spring is increased in the hardness variable sheath adapter of FIG. 1;
FIG. 3 is a cross-sectional view showing a state where the compression degree of the compression coil spring is reduced in the variable hardness sheath adapter of FIG. 1;
FIG. 4 is an external view of a use state in which the variable hardness sheath adapter of FIGS. 1 to 3 is attached to an endoscope.
[Explanation of symbols]
10 Hardness variable sheath adapter 11 Hardness variable tube portion 11a Outer cylinder 11b Inner cylinder 11c Annular coil insertion space 11d Tip cap 12 Hardness operation section 15 Compression coil spring 16 Cylinder member 16a Outer cylinder 16b Inner cylinder 16c Annular space 16d Straight guide protrusion 16e Ring Through hole 17 Slider (moving ring)
17a Straight groove 17b Thread 17c Tip pressing part 18 Hardness adjusting ring 18a Thread 19 Endoscope insertion space 20 Endoscope 21 Insertion part 22 Operation part 23 Curved part 24 Flexible tube part

Claims (4)

操作部から延びる挿入部の外周面に挿脱可能な硬度可変シースアダプタであって、
上記挿入部外周面に沿う内管と；
この内管との間に環状コイル挿入空間を形成する外管と；
この環状コイル挿入空間内に挿入された圧縮コイルばねと；
この圧縮コイルばねの圧縮度を変化させる圧縮度調整機構と；
を有することを特徴とする内視鏡の硬度可変シースアダプタ。A hardness-variable sheath adapter that can be inserted into and removed from an outer peripheral surface of an insertion portion extending from the operation portion,
An inner tube along the outer peripheral surface of the insertion portion;
An outer tube forming an annular coil insertion space between the inner tube and the inner tube;
A compression coil spring inserted into the annular coil insertion space;
A compression degree adjusting mechanism for changing the compression degree of the compression coil spring;
A variable hardness sheath adapter for an endoscope, comprising: 請求項１記載の硬度可変シースアダプタにおいて、圧縮コイルばねの圧縮度調整機構は、上記環状コイル挿入空間に連通させて操作部側の端部に形成された環状空間と、この環状空間に直進進退動可能に支持され、その先端部が圧縮コイルバネに当接する移動環と、この移動環に螺合され環状空間から突出させて軸方向移動を規制し回動操作可能に支持された硬度調整リングとからなる内視鏡の硬度可変シースアダプタ。2. The variable hardness sheath adapter according to claim 1, wherein the compression degree adjusting mechanism of the compression coil spring communicates with the annular coil insertion space and has an annular space formed at an end on the operation portion side, and linearly advances and retreats into the annular space. A movable ring that is movably supported, the tip of which is in contact with the compression coil spring; and a hardness adjustment ring that is screwed to the movable ring, protrudes from the annular space, regulates axial movement, and is supported rotatively. Endoscope hardness variable sheath adapter consisting of: 操作部から延びる挿入部の外周面に沿う内管と；
この内管との間に環状コイル挿入空間を形成する外管と；
この環状コイル挿入空間内に挿入された圧縮コイルばねと；
この圧縮コイルばねの圧縮度を変化させる圧縮度調整機構と；
を有することを特徴とする内視鏡の硬度可変装置。An inner tube along the outer peripheral surface of the insertion portion extending from the operation portion;
An outer tube forming an annular coil insertion space between the inner tube and the inner tube;
A compression coil spring inserted into the annular coil insertion space;
A compression degree adjusting mechanism for changing the compression degree of the compression coil spring;
A variable hardness device for an endoscope, comprising: 請求項３記載の硬度可変装置において、圧縮コイルばねの圧縮度調整機構は、上記環状コイル挿入空間に連通させて操作部側の端部に形成された環状空間と、この環状空間に直進進退動可能に支持され、その先端部が圧縮コイルバネに当接する移動環と、この移動環に螺合され環状空間から突出させて軸方向移動を規制し回動操作可能に支持された硬度調整リングとからなる内視鏡の硬度可変装置。4. The variable hardness device according to claim 3, wherein the compression degree adjusting mechanism of the compression coil spring communicates with the annular coil insertion space and has an annular space formed at an end on the operation portion side, and linearly moves back and forth in the annular space. A movable ring whose end is in contact with the compression coil spring and a hardness adjusting ring which is screwed to the movable ring and protrudes from the annular space to regulate axial movement and is supported so as to be rotatable. A variable endoscope hardness device.
JP2002231242A 2002-08-08 2002-08-08 Endoscope hardness variable sheath adapter Expired - Fee Related JP4172966B2 (en)

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