JP4412785B2 - Flexible tube of the endoscope - Google Patents

Flexible tube of the endoscope Download PDF

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Publication number
JP4412785B2
JP4412785B2 JP2000000555A JP2000000555A JP4412785B2 JP 4412785 B2 JP4412785 B2 JP 4412785B2 JP 2000000555 A JP2000000555 A JP 2000000555A JP 2000000555 A JP2000000555 A JP 2000000555A JP 4412785 B2 JP4412785 B2 JP 4412785B2
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flexible tube
tube
endoscope
portion
outer
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JP2000000555A
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JP2001190494A (en
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隆之 荻野
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Hoya株式会社
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Description

【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
この発明は内視鏡の可撓管に関する。 This invention relates to a flexible tube of the endoscope.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
内視鏡の可撓管は、一般に、螺旋管の外面に網状管が被覆され、その網状管の外面にさらに外皮が被覆された構成になっている。 Flexible tube of the endoscope, generally, the mesh tube is coated on the outer surface of the spiral tube, further skin on the outer surface of the braid tube is turned configurations coated.
【0003】 [0003]
そして、多くの場合、可撓管の先端寄りの部分の可撓性を大きく(即ち、柔軟に曲がり易く)し、基端寄りの部分の可撓性を小さくすると挿入性が良くなるので、外皮を形成する合成樹脂材の硬度を可撓管の長手方向で複数段階に変化させ、それらを直列につなぎ合わせて一本の可撓管を形成している。 And, in many cases, flexibility large tip-sided portion of the flexible tube (i.e., flexible bending easy) and, since the insertion resistance to reduce the flexibility of the portion of the proximally is improved, skin varied in a plurality of stages the hardness of synthetic resin material forming in the longitudinal direction of the flexible tube, by connecting them in series to form a single flexible tube.
【0004】 [0004]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
しかし、そのような構造の内視鏡の可撓管は、つなぎ部分において可撓性が急激に変化するので、操作上の違和感が生じたり、つなぎ部で柔らかい方の部分が座屈破損し易かったりする欠点があり、また、外皮を隙間や段差等ができないように直列につなぎ合わせる製造作業は煩雑なものになってコスト高になっていた。 However, the flexible tube of an endoscope having such structure, since the flexible in connecting portion changes rapidly, or cause discomfort on the operation, the softer parts at the connecting portion seat 屈破 and lose Yasuka' There are drawbacks to or, also, manufacturing operations joining in series so that no gaps or steps, etc. the skin had become cost become cumbersome.
【0005】 [0005]
そこで本発明は、可撓性が長手方向に滑らかに変化し、しかも製造上の作業性がよい内視鏡の可撓管を提供することを目的とする。 The present invention has flexibility smoothly changes in the longitudinal direction, moreover an object to provide a flexible tube of the work is good endoscope manufacturing.
【0006】 [0006]
【課題を解決するための手段】 In order to solve the problems]
上記の目的を達成するため、本発明の内視鏡の可撓管は、螺旋管の外面に網状管が被覆され、その網状管の外面にさらに可撓性の外皮が被覆された内視鏡の可撓管において、外皮の肉厚を、部分的に又は全体に、先端側から基端側へ次第に厚く形成したものである。 To achieve the above object, the flexible tube of the endoscope of the present invention, the mesh tube is coated on the outer surface of the spiral tube, the endoscope further flexible skin on the outer surface of the mesh tube was coated in the flexible tube, the wall thickness of the outer skin, partially or wholly, is obtained by gradually thicker from the distal end toward the proximal end side.
【0007】 [0007]
なお、外皮の内径寸法が一定であり、肉厚変化部分では外皮の外径寸法が変化していてもよく、外皮の肉厚が、先端寄りの部分と基端寄りの部分では各々一定であり、その中間部分において先端側から基端側へ次第に厚く形成されていてもよい。 It is to be the inner diameter of the outer skin is fixed, the thickness changing portions may be the outer diameter of the outer skin has been changed, the thickness of the crust, there in each constant in the portion of the tip side of the portion and the base end-sided it may be gradually thicker from the distal end toward the proximal end side in the middle portion.
【0008】 [0008]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
図面を参照して本発明の実施の形態を説明する。 With reference to the accompanying drawings illustrating the embodiments of the present invention.
図2は本発明の第1の実施の形態の内視鏡を示しており、体腔内に挿入される挿入部1は、可撓管10によって外装された部分の先側に、挿入部1の基端に連結された操作部2からの遠隔操作によって屈曲する湾曲部3が連結され、対物光学系等を内蔵する先端部本体4が湾曲部3の先端に連結されて構成されている。 Figure 2 shows the endoscope of the first embodiment of the present invention, the insertion portion 1 is inserted into the body cavity, the front side of the outer portion by a flexible tube 10, the insertion portion 1 curved portion 3 which is bent by remote operation from the operation unit 2 which is connected to the proximal end is connected, the distal end portion main body 4 having a built-in objective optical system and the like is constructed is connected to the distal end of the bending portion 3.
【0009】 [0009]
なお、可撓管10の基端部分付近の外面には、弾力性のあるゴム材等によって操作部2との連結部分から次第に肉厚が薄くなるテーパ状に形成された折れ止め5が装着されている。 Note that the outer surface near the proximal portion of the flexible tube 10, stop 5 fold formed gradually tapered wall thickness becomes thinner from the connecting portion between the operating portion 2 by a rubber material or the like resilient is mounted ing.
【0010】 [0010]
可撓管10は、図1に半断面図(中心線の右半部の断面を図示し、左半部の図示は省略した図)が示されるように、金属帯材を一定の径で螺旋状に巻いて形成された螺旋管11が最も内側の層に配置されている。 Flexible tube 10, (shown on the right half of the cross section of the center line, shown in the left half are omitted FIG) half sectional view in FIG. 1 as shown, the helical metal strip material with a constant diameter spiral tube 11 formed by winding the Jo is arranged innermost layer.
【0011】 [0011]
この実施の形態においては、螺旋管11は巻き方向が相違する螺旋管11a,11bを二重に重ねて構成されているが、三重以上でもよく、或いは一重であってもよい。 In this embodiment, the spiral tube 11a spiral tube 11 which is winding direction different, are configured to overlap and 11b double may be a triple or more, or may be a single.
【0012】 [0012]
螺旋管11の外面には、金属細線等を編組して形成された網状管12が被覆され、その網状管12の外面に、例えばポリウレタン樹脂等のような合成樹脂材からなる可撓性の外皮13が被覆されて構成されている。 The outer surface of the helical tube 11, the mesh tube 12 formed by braiding a metal thin wire or the like is coated on the outer surface of the mesh tube 12, for example, a flexible skin made of a synthetic resin material such as polyurethane resin 13 is constructed by coating.
【0013】 [0013]
そして、この実施の形態においては、外皮13の肉厚が全長にわたって先端側から基端側へ次第に厚く形成されている。 Then, in this embodiment, the thickness of the outer skin 13 is gradually thicker from the distal end toward the proximal end side over the entire length. 即ち、外皮13の内径寸法は全長にわたって一定なので、外皮13の外径寸法が、全長にわたって先端側から基端側へ次第に大きく形成されている。 That is, since the inner diameter of the outer skin 13 is constant over the entire length, outer diameter of the outer cover 13 are gradually larger from the distal end side toward the proximal end side over the entire length.
【0014】 [0014]
その結果、可撓管10は先端寄りの部分より基端寄りの部分の可撓性が小さくて、曲げに対する抵抗が大きくなっているので挿入性が良く、しかもその可撓性が長手方向に徐々に滑らかに変化しているので、操作上の違和感がなく、挿入操作時の座屈破損も発生し難い。 As a result, the flexible tube 10 has a small flexible portion of the proximal to the portion of the tip-sided, good insertability the resistance is increased to bending, yet gradually its flexibility in the longitudinal direction since the changes smoothly in, there is no discomfort on the operation, also less likely to occur buckling breakage at the time of insertion operation.
【0015】 [0015]
このような可撓管10を製造するには、外皮13として、肉厚が徐々に変化したチューブを用いればよく、外皮13を押し出し成形により形成する場合には、ダイス内を通過する可撓管10の通過速度(引き抜き速度)を徐々に変化させればよい。 To produce such a flexible tube 10, as the outer skin 13 may be used a tube wall thickness is gradually changed, in the case of forming by extruding a skin 13, a flexible tube passing through the die passing speed of 10 it is sufficient (withdrawal speed) gradually changes. いずれの場合にも、製造作業が煩雑にならず製造上の作業性がよい。 In any case, good workability in manufacture not complicated manufacturing operations.
【0016】 [0016]
図3は、本発明の第2の実施の形態の可撓管10が用いられた内視鏡を示しており、外皮13の肉厚が、可撓管10の先端寄りの部分10aと基端寄りの部分10bでは各々一定であり、その中間部分10cにおいて先端側から基端側へ次第に厚く形成したものである。 Figure 3 shows the endoscope flexible tube 10 of the second embodiment of the present invention is used, the thickness of the outer cover 13, portions 10a and proximal of the distal end side of the flexible tube 10 it is constant each the deviation portions 10b, is obtained by gradually thicker from the distal end toward the proximal end side in the middle portion 10c.
【0017】 [0017]
内視鏡の用途等に応じて可撓管10をこのように構成しても、上述の第1の実施の形態の場合と全く同様の長所を有する。 Even when the flexible tube 10 according to the use or the like of the endoscope configured as described above, have exactly the same advantages as in the first embodiment described above. なお、第1及び第2の実施の形態共に、外皮13の肉厚変化の程度(テーパ角度)を途中で変化させてもよい。 Incidentally, the first and second embodiments both the degree of thickness variation of the outer skin 13 (taper angle) may be varied in the middle.
【0018】 [0018]
図4は本発明の第3の実施の形態の内視鏡を示しており、操作部2との連結部付近において外皮13の肉厚が基端側へ徐々に厚くなっている可撓管10を用いることにより、そこに折れ止めとして独立した部品を取り付けることを省略したものである。 Figure 4 is a third shows the endoscope of the embodiment, the operation unit 2 and the flexible tube 10 wall thickness is gradually thicker toward the proximal end of the outer skin 13 in the vicinity of connecting portions of the present invention by using, but omitted to attach a separate component as a stop break there.
【0019】 [0019]
【発明の効果】 【Effect of the invention】
本発明によれば、可撓管の外皮の肉厚を、部分的に又は全体に、先端側から基端側へ次第に厚く形成したことにより、可撓管の先端寄りの部分より基端寄りの部分の可撓性が小さくなっているので挿入性が良く、しかもその可撓性が徐々に滑らかに変化しているので、操作上の違和感がなく、挿入操作時の座屈破損も発生し難い。 According to the present invention, the thickness of the outer skin of the flexible tube, partially or totally, by which gradually thicker from the distal side to the proximal side, of the flexible tube distal portion closer than the proximal end side of the the portion of the flexible is smaller better insertability, and since its flexibility is gradually changed smoothly, no discomfort on the operation, even less likely to occur buckling breakage at the time of insertion operation .
【0020】 [0020]
そして、外皮につなぎ部分がないので、製造作業が煩雑にならず製造上の作業性がよい。 And, since there is no joint portion outer skin, good workability in manufacturing it does not become complicated manufacturing operations.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明の第1の実施の形態の内視鏡の可撓管の半断面図である。 1 is a half cross-sectional view of a first embodiment the flexible tube of the endoscope of the present invention.
【図2】本発明の第1の実施の形態の内視鏡の側面図である。 2 is a side view of an endoscope of the first embodiment of the present invention.
【図3】本発明の第2の実施の形態の内視鏡の側面図である。 3 is a side view of an endoscope of the second embodiment of the present invention.
【図4】本発明の第3の実施の形態の内視鏡の側面図である。 Is a side view of an endoscope of the third embodiment of the present invention; FIG.
【符号の説明】 DESCRIPTION OF SYMBOLS
1 挿入部5 折れ止め10 可撓管11 螺旋管12 網状管13 外皮 1 insertion part 5 protection hood 10 the flexible tube 11 spiral tube 12 mesh tube 13 outer skin

Claims (2)

  1. 螺旋管の外面に網状管が被覆され、上記網状管の外面にさらに可撓性の外皮が被覆されて、基端が操作部に連結された内視鏡の可撓管において、 Mesh tube is coated on the outer surface of the spiral tube and the outer skin of more flexible on the outer surface of the mesh tube is coated, in a flexible tube of an endoscope proximal end is connected to the operating unit,
    上記外皮の肉厚が、全に先端側から基端側へ次第に厚く形成されることにより、上記操作部との連結部付近が急激に曲がって破損するのを防止するための折れ止めとして、独立した部品が設けられていないことを特徴とする内視鏡の可撓管。 The thickness of the crust, by being gradually thicker from the previous end side to the proximal side to the whole, as a protection hood for the vicinity connection portion between the operation unit is prevented from being damaged bent sharply , flexible tube of an endoscope, characterized in that separate components is not provided.
  2. 上記外皮の内径寸法が一定であり、上記肉厚変化部分では上記外皮の外径寸法が変化している請求項1記載の内視鏡の可撓管。 The inner diameter of the outer skin is constant, flexible tube of an endoscope according to claim 1, wherein the outer diameter of the outer skin has changed in the thickness changing portion.
JP2000000555A 2000-01-06 2000-01-06 Flexible tube of the endoscope Active JP4412785B2 (en)

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JP4412785B2 true JP4412785B2 (en) 2010-02-10

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005081100A (en) * 2003-09-11 2005-03-31 Olympus Corp Flexible tube of endoscope
JP2006014960A (en) * 2004-07-01 2006-01-19 Olympus Corp Endoscope
JP2009226023A (en) * 2008-03-24 2009-10-08 Fujifilm Corp Method for manufacturing flexible tube for endoscope
JP5290921B2 (en) * 2009-09-25 2013-09-18 富士フイルム株式会社 Endoscopic flexible tube and a manufacturing apparatus and manufacturing method thereof
CN102772193B (en) * 2012-06-27 2014-06-04 杭州好克光电仪器有限公司 Flexible electron mirror
JP5968939B2 (en) * 2014-03-26 2016-08-10 富士フイルム株式会社 Endoscopic flexible tube and a manufacturing method thereof

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