JP4708930B2 - Baby scope insertion section flexible tube - Google Patents

Baby scope insertion section flexible tube Download PDF

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Publication number
JP4708930B2
JP4708930B2 JP2005263180A JP2005263180A JP4708930B2 JP 4708930 B2 JP4708930 B2 JP 4708930B2 JP 2005263180 A JP2005263180 A JP 2005263180A JP 2005263180 A JP2005263180 A JP 2005263180A JP 4708930 B2 JP4708930 B2 JP 4708930B2
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tube
flexible tube
manufacturing cost
flexible
highly durable
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JP2007075168A (en
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圭史 國井
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Hoya Corp
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Hoya 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
    • A61B1/005—Flexible endoscopes
    • A61B1/0051—Flexible endoscopes with controlled bending of insertion part
    • A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
    • 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
    • A61B1/012—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 characterised by internal passages or accessories therefor
    • A61B1/0125—Endoscope within endoscope
    • 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
    • A61B1/0011—Manufacturing of endoscope parts

Description

この発明は、親子式内視鏡のベビースコープの挿入部可撓管に関する。   The present invention relates to an insertion portion flexible tube of a baby scope of a parent-child endoscope.

親子式内視鏡においては、マザースコープのガイドチャンネル内にベビースコープの挿入部可撓管が挿脱して使用され、そのようなベビースコープの挿入部可撓管は一般に、螺旋管に網状管が被覆されてその外面が外装チューブで覆われた構造になっている（例えば、特許文献１）。
実公平７−３１７６５ In a parent-child endoscope, a babyscope insertion section flexible tube is inserted into and removed from a mother scope guide channel, and the babyscope insertion section flexible tube is generally a spiral tube with a mesh tube. The outer surface is covered and covered with an exterior tube (for example, Patent Document 1).
Reality 7-31765

ベビースコープの挿入部可撓管は、先端部分付近が、マザースコープの挿入部先端に配置された起上片部分で小さな曲率半径で側方に曲げられる使われ方をされる場合が少なくないので、その部分で潰れたり座屈したりしないだけの耐久性を必要とし、上述のように螺旋管に網状管が被覆されてその外面が外装チューブで覆われた構造が採用されている。   Because the insertion tube flexible part of the baby scope is often used in the vicinity of the tip part, it is bent sideways with a small curvature radius at the rising piece part arranged at the tip of the mother scope insertion part. The structure needs to be durable enough not to be crushed or buckled, and has a structure in which a mesh tube is covered with a spiral tube and its outer surface is covered with an exterior tube as described above.

しかし、ベビースコープの挿入部可撓管は外径寸法が僅か２〜３ｍｍ程度の極細のものなので、１０〜５０ｃｍ程度の長さのものを製造するのはさほど困難ではないが、例えば十二指腸に開口する膵胆管の出口（ファーター氏乳頭）等に挿入するために１．５〜２ｍ程度の長さに製造しようとすると、均一な状態に製造するのは極めて困難で歩留りが非常に悪く、また螺旋管の製造とその取り扱いがどうしても手作業になってしまうことから製造に著しく時間がかかって製造コストが莫大なものになってしまう欠点があった。   However, since the baby tube insertion tube has a very thin outer diameter of only 2 to 3 mm, it is not so difficult to manufacture a tube with a length of about 10 to 50 cm. If you try to make it to a length of about 1.5-2m for insertion into the outlet of the pancreaticobiliary duct (Farter's nipple), etc., it is extremely difficult to produce in a uniform state, the yield is very bad, and the spiral Since the manufacture and handling of the pipes are inevitably manual work, there is a drawback in that the production takes a very long time and the production cost becomes enormous.

そこで本発明は、マザースコープの起上片部分を通過しても破損しない耐久性を有していてしかも製造コストを大幅に引き下げることができるベビースコープの挿入部可撓管を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a flexible insertion tube for a baby scope that has durability that does not break even when passing through a raising piece portion of a mother scope and that can greatly reduce the manufacturing cost. And

上記の目的を達成するため、本発明のベビースコープの挿入部可撓管は、マザースコープのガイドチャンネル内に挿脱されるベビースコープの挿入部可撓管において、先端寄りの部分が、螺旋管に網状管が被覆されてその外面が外装チューブで覆われた高耐久性の可撓管で形成され、それより後方の部分が、螺旋管に代えて配置された可撓性チューブに網状管が被覆されてその外面が外皮で覆われた低製造コストの可撓管で形成されているものである。   In order to achieve the above object, the insertion tube flexible tube of the baby scope of the present invention is the insertion tube flexible tube of the baby scope that is inserted into and removed from the guide channel of the mother scope. The mesh tube is coated with a highly durable flexible tube whose outer surface is covered with an outer tube, and the mesh tube is attached to the flexible tube arranged in place of the spiral tube at the back of the tube. It is formed of a low-cost flexible tube that is covered and covered with an outer skin.

なお、高耐久性の可撓管が手作業により製造され、低製造コストの可撓管が押出成形機により製造されていてもよく、高耐久性の可撓管と低製造コストの可撓管とが、高耐久性可撓管の螺旋管の外周面に低製造コスト可撓管の可撓性チューブの内周面を直接接合して連結されていてもよい。   The highly durable flexible tube may be manufactured manually, and the low manufacturing cost flexible tube may be manufactured by an extrusion molding machine. The high durability flexible tube and the low manufacturing cost flexible tube may be manufactured. May be connected to the outer peripheral surface of the helical tube of the highly durable flexible tube by directly joining the inner peripheral surface of the flexible tube of the low manufacturing cost flexible tube.

或いは、高耐久性可撓管と低製造コスト可撓管とが接続筒を介して連結され、接続筒は、一方の半部において高耐久性可撓管の螺旋管の外周面に接合連結され、他方の半部において低製造コスト可撓管の可撓性チューブの内周面に接合連結されていてもよい。   Alternatively, the highly durable flexible tube and the low manufacturing cost flexible tube are connected via a connecting tube, and the connecting tube is joined and connected to the outer peripheral surface of the spiral tube of the highly durable flexible tube in one half. The other half may be joined and connected to the inner peripheral surface of the flexible tube of the low manufacturing cost flexible tube.

本発明のベビースコープの挿入部可撓管によれば、先端寄りの部分が、螺旋管に網状管が被覆されてその外面が外装チューブで覆われた高耐久性の可撓管で形成され、それより後方の部分が、高耐久性の可撓管の螺旋管に代えて配置された可撓性チューブに網状管が被覆されてその外面が外皮で覆われた低製造コストの可撓管で形成されているので先端寄りの部分は、マザースコープの起上片部分を通過することにより破損しない耐久性を有していて、しかも全体としての製造コストを大幅に引き下げることができる。   According to the insertion tube flexible tube of the baby scope of the present invention, the portion near the tip is formed of a highly durable flexible tube in which a spiral tube is covered with a mesh tube and its outer surface is covered with an exterior tube, The rear part is a low-cost flexible tube in which a mesh tube is covered with a flexible tube arranged in place of the highly durable flexible tube and its outer surface is covered with an outer skin. Since it is formed, the portion near the tip has durability that does not break by passing through the raising piece portion of the mother scope, and the manufacturing cost as a whole can be greatly reduced.

マザースコープのガイドチャンネル内に挿脱されるベビースコープの挿入部可撓管において、先端寄りの部分が、螺旋管に網状管が被覆されてその外面が外装チューブで覆われた高耐久性の可撓管で形成され、それより後方の部分が、螺旋管に代えて配置された可撓性チューブに網状管が被覆されてその外面が外皮で覆われた低製造コストの可撓管で形成されている。   In the insertion tube of the baby scope that is inserted into and removed from the guide channel of the mother scope, the portion near the tip has a mesh tube covered with a spiral tube and the outer surface is covered with an exterior tube. It is formed of a flexible tube, and the portion behind it is formed of a flexible tube with a low manufacturing cost, in which a mesh tube is covered with a flexible tube arranged in place of a helical tube, and its outer surface is covered with an outer skin. ing.

図面を参照して本発明の実施例を説明する。
図２において、１０はベビースコープ、２０はマザースコープであり、ベビースコープ１０の挿入部可撓管１１は例えば外径寸法が２〜３ｍｍ程度で長さが１．５〜２ｍ程度に形成されて、観察窓と照明窓が配置された先端部本体１２が挿入部可撓管１１の先端に設けられている。１３は、挿入部可撓管１１の基端に連結された操作部である。 Embodiments of the present invention will be described with reference to the drawings.
In FIG. 2, 10 is a baby scope, 20 is a mother scope, and the insertion tube flexible tube 11 of the baby scope 10 has an outer diameter of about 2 to 3 mm and a length of about 1.5 to 2 m. A distal end main body 12 in which an observation window and an illumination window are arranged is provided at the distal end of the insertion portion flexible tube 11. Reference numeral 13 denotes an operation unit connected to the proximal end of the insertion portion flexible tube 11.

マザースコープ２０の挿入部可撓管２１内には、ベビースコープ１０の挿入部可撓管１１を通すことができるガイドチャンネル２３が挿通配置されていて、挿入部可撓管２１の先端に連結された先端部本体２２内には、ガイドチャンネル２３の先端から突出するベビースコープ１０の挿入部可撓管１１を起上させるために後述する起上片が内蔵されている。２６は、起上片の動作を遠隔操作するためにマザースコープ２０の操作部２５に配置された操作レバーである。   A guide channel 23 through which the insertion tube flexible tube 11 of the baby scope 10 can be inserted is inserted into the insertion tube flexible tube 21 of the mother scope 20, and is connected to the distal end of the insertion tube flexible tube 21. In the distal end main body 22, a raising piece described later is incorporated to raise the insertion tube flexible tube 11 of the baby scope 10 protruding from the distal end of the guide channel 23. Reference numeral 26 denotes an operation lever disposed on the operation unit 25 of the mother scope 20 to remotely control the operation of the raising piece.

図３は、マザースコープ２０の先端部本体２２部分を示しており、起上片２４は、支軸２４ｘを中心に回動自在にガイドチャンネル２３の出口部分に配置されて先端部本体２２に支持されており、操作レバー２６で起上片２４を適宜回動操作することによりベビースコープ１０の挿入部可撓管１１の突出方向が変化する。   FIG. 3 shows the distal end portion main body 22 portion of the mother scope 20, and the raising piece 24 is disposed at the exit portion of the guide channel 23 so as to be rotatable about the support shaft 24 x and supported by the distal end portion main body 22. The protruding direction of the insertion portion flexible tube 11 of the baby scope 10 is changed by appropriately rotating the raising piece 24 with the operation lever 26.

図４はベビースコープ１０のみを示しており、挿入部可撓管１１は、先端寄りの潰れや座屈に強い高耐久性の可撓管１１Ａと、後方寄りの低製造コストの可撓管１１Ｂとを連結して形成されている。高耐久性の可撓管１１Ａの長さＬは例えば１０〜５０ｃｍ程度である。   FIG. 4 shows only the baby scope 10, and the insertion portion flexible tube 11 includes a highly durable flexible tube 11A that is strong against crushing and buckling near the tip, and a flexible tube 11B near the rear that is low in manufacturing cost. And connected. The length L of the highly durable flexible tube 11A is, for example, about 10 to 50 cm.

高耐久性の可撓管１１Ａは、図５に示されるように、バネ性のある金属帯材等により形成された巻き方向が相違する二つの螺旋管１１１を重ね合わせて巻いて内層部分に配置し、その外面に、ステンレス鋼細線材等を編組して形成された網状管１１２を被覆して、さらにその外面に例えばポリウレタン樹脂チューブ又はフッ素樹脂チューブ等からなる外装チューブ１１３を被覆して構成されている。低製造コストの可撓管１１Ｂの長さは例えば１〜２ｍ程度である。なお、螺旋管１１１が２重以外の構造であってもよい。   As shown in FIG. 5, the highly durable flexible tube 11 </ b> A is arranged on the inner layer portion by overlapping two spiral tubes 111 formed of spring-like metal strips or the like with different winding directions. The outer surface is covered with a mesh tube 112 formed by braiding a stainless steel fine wire or the like, and the outer surface is further covered with an exterior tube 113 made of, for example, a polyurethane resin tube or a fluororesin tube. ing. The length of the flexible tube 11B with a low manufacturing cost is, for example, about 1 to 2 m. The spiral tube 111 may have a structure other than double.

このような構成の高耐久性の可撓管１１Ａは、マザースコープ２０の起上片２４部分で小さな曲率半径で曲げられながら進退操作されても潰れや座屈等が発生し難い優れた耐久性を有するが、外径寸法が２〜３ｍｍ程度のものの製造は手作業に頼るところが大きくて、製造コストが相当にかかってしまう。しかし、高耐久性の可撓管１１Ａの長さＬが１０〜５０ｃｍ程度なので、１．５〜２ｍ程度の長尺のものを製造するのに比べるとその製造コストは著しく低減されている。   The highly durable flexible tube 11A having such a configuration has excellent durability that is not easily crushed or buckled even if it is advanced or retracted while being bent with a small radius of curvature at the raising piece 24 of the mother scope 20. However, the manufacture of one having an outer diameter of about 2 to 3 mm relies heavily on manual work, and the manufacturing cost is considerably increased. However, since the length L of the highly durable flexible tube 11A is about 10 to 50 cm, the manufacturing cost is remarkably reduced as compared with manufacturing a long length of about 1.5 to 2 m.

低製造コストの可撓管１１Ｂは、図６に示されるように、高耐久性の可撓管１１Ａの螺旋管１１１に代えて例えばポリウレタン樹脂チューブ又はフッ素樹脂チューブ等のような可撓性チューブ１１４が内層部分に配置され、その可撓性チューブ１１４に網状管１１５が被覆されてその外面が外皮１１６で覆われている。   As shown in FIG. 6, the flexible tube 11B having a low manufacturing cost is a flexible tube 114 such as a polyurethane resin tube or a fluororesin tube instead of the spiral tube 111 of the highly durable flexible tube 11A. Is arranged in the inner layer portion, and the flexible tube 114 is covered with the mesh tube 115 and the outer surface thereof is covered with the outer skin 116.

このような低製造コストの可撓管１１Ｂは、高耐久性の可撓管１１Ａに比べて潰れや座屈等に対する耐久性の点で劣るものの、マザースコープ２０の起上片２４に達しない部分なので使用上十分な耐久性を有している。そして低製造コストの可撓管１１Ｂは、押出成形機により容易に製造することがてきるので、高耐久性の可撓管１１Ａに比較して大幅に低コストで製造することができる。   Such a low-cost flexible tube 11B is inferior to the highly durable flexible tube 11A in terms of durability against crushing and buckling, but does not reach the rising piece 24 of the mother scope 20. So it has sufficient durability in use. Since the flexible tube 11B having a low manufacturing cost can be easily manufactured by an extruder, the flexible tube 11B can be manufactured at a significantly lower cost than the highly durable flexible tube 11A.

図１は、高耐久性の可撓管１１Ａと低製造コストの可撓管１１Ｂとの連結部の一例を示しており、高耐久性の可撓管１１Ａと低製造コストの可撓管１１Ｂとが、高耐久性の可撓管１１Ａの螺旋管１１１の外周面に低製造コストの可撓管１１Ｂの可撓性チューブ１１４の内周面を接着剤で直接接合して連結されている。なお、螺旋管１１１の端部付近は半田付けによって固められている。このように構成することにより、連結部を設けることによって生じる硬質部の長さを極力短くすることができる。   FIG. 1 shows an example of a connecting portion between a highly durable flexible tube 11A and a low manufacturing cost flexible tube 11B. The high durability flexible tube 11A and the low manufacturing cost flexible tube 11B However, the inner peripheral surface of the flexible tube 114 of the flexible tube 11B having a low manufacturing cost is directly joined to the outer peripheral surface of the spiral tube 111 of the highly durable flexible tube 11A by an adhesive. Note that the vicinity of the end of the spiral tube 111 is hardened by soldering. By comprising in this way, the length of the hard part produced by providing a connection part can be shortened as much as possible.

図７は、高耐久性の可撓管１１Ａと低製造コストの可撓管１１Ｂとの連結部の他の例を示しており、高耐久性の可撓管１１Ａと低製造コストの可撓管１１Ｂとが金属製の接続筒１１７を介して連結されていて、接続筒１１７は、一方の半部において高耐久性の可撓管１１Ａの螺旋管１１１の外周面に例えば半田付け等により接合連結されて、他方の半部において低製造コストの可撓管１１Ｂの可撓性チューブ１１４の内周面に接着剤等で接合連結されている。このように構成することにより、高耐久性の可撓管１１Ａと低製造コストの可撓管１１Ｂとを優れた強度で連結することができる。   FIG. 7 shows another example of the connecting portion between the highly durable flexible tube 11A and the low manufacturing cost flexible tube 11B. The highly durable flexible tube 11A and the low manufacturing cost flexible tube are shown in FIG. 11B is connected via a metal connecting tube 117, and the connecting tube 117 is joined and connected to the outer peripheral surface of the spiral tube 111 of the highly durable flexible tube 11A in one half portion, for example, by soldering or the like. Then, the other half is joined and connected to the inner peripheral surface of the flexible tube 114 of the flexible tube 11B at a low manufacturing cost by an adhesive or the like. By comprising in this way, the highly durable flexible tube 11A and the flexible tube 11B of low manufacturing cost can be connected with the outstanding intensity | strength.

本発明の実施例のベビースコープの挿入部可撓管の、高耐久性の可撓管と低製造コストの可撓管との連結部の一例の側面断面図である。It is side surface sectional drawing of an example of the connection part of the highly durable flexible tube and the flexible tube of low manufacturing cost of the insertion part flexible tube of the baby scope of the Example of this invention. 本発明の実施例のベビースコープとマザースコープの全体構成を示す側面図である。It is a side view which shows the whole structure of the baby scope and mother scope of the Example of this invention. 本発明の実施例のマザースコープの先端部本体部分の側面断面図である。It is side surface sectional drawing of the front-end | tip part main-body part of the mother scope of the Example of this invention. 本発明の実施例のベビースコープの側面図である。It is a side view of the baby scope of the example of the present invention. 本発明の実施例のベビースコープの高耐久性の可撓管の側面断面図である。It is side surface sectional drawing of the highly durable flexible tube of the baby scope of the Example of this invention. 本発明の実施例のベビースコープの低製造コストの可撓管の側面断面図である。It is side surface sectional drawing of the flexible tube of the low manufacturing cost of the baby scope of the Example of this invention. 本発明の実施例のベビースコープの挿入部可撓管の、高耐久性の可撓管と低製造コストの可撓管との連結部の他の例の側面断面図である。It is side surface sectional drawing of the other example of the connection part of the highly durable flexible tube and the flexible tube of low manufacturing cost of the insertion part flexible tube of the baby scope of the Example of this invention.

符号の説明Explanation of symbols

１０ ベビースコープ
１１ 挿入部可撓管
１１Ａ 高耐久性の可撓管
１１Ｂ 低製造コストの可撓管
１１１ 螺旋管
１１２ 網状管
１１３ 外装チューブ
１１４ 可撓性チューブ
１１５ 網状管
１１６ 外皮
１１７ 接続筒
２０ マザースコープ
２３ ガイドチャンネル
２４ 起上片 DESCRIPTION OF SYMBOLS 10 Babyscope 11 Insertion part flexible tube 11A High durability flexible tube 11B Low production cost flexible tube 111 Spiral tube 112 Mesh tube 113 Exterior tube 114 Flexible tube 115 Mesh tube 116 Outer skin 117 Connecting tube 20 Mother scope 23 Guide channel 24 Lifting piece

Claims (4)

マザースコープのガイドチャンネル内に挿脱されるベビースコープの挿入部可撓管において、
先端寄りの部分が、螺旋管に網状管が被覆されてその外面が外装チューブで覆われた高耐久性の可撓管で形成され、それより後方の部分が、上記螺旋管に代えて配置された可撓性チューブに網状管が被覆されてその外面が外皮で覆われた低製造コストの可撓管で形成されていることを特徴とするベビースコープの挿入部可撓管。 In the insertion tube flexible tube of the baby scope that is inserted into and removed from the guide channel of the mother scope,
The portion near the tip is formed of a highly durable flexible tube in which a spiral tube is covered with a mesh tube and the outer surface is covered with an exterior tube, and the portion behind it is arranged in place of the spiral tube. An insertion portion flexible tube for a baby scope, characterized in that the flexible tube is formed of a low-cost flexible tube in which a reticulated tube is covered with a mesh tube and the outer surface is covered with an outer skin. 上記高耐久性の可撓管が手作業により製造され、上記低製造コストの可撓管が押出成形機により製造されている請求項１記載のベビースコープの挿入部可撓管。   The baby tube insertion portion flexible tube according to claim 1, wherein the highly durable flexible tube is manufactured manually, and the low manufacturing cost flexible tube is manufactured by an extruder. 上記高耐久性の可撓管と上記低製造コストの可撓管とが、上記高耐久性可撓管の螺旋管の外周面に上記低製造コスト可撓管の可撓性チューブの内周面を直接接合して連結されている請求項１又は２記載のベビースコープの挿入部可撓管。   The high durability flexible tube and the low manufacturing cost flexible tube are arranged on the outer peripheral surface of the helical tube of the high durability flexible tube and the inner peripheral surface of the flexible tube of the low manufacturing cost flexible tube. The insertion tube flexible tube of the baby scope according to claim 1 or 2, which is joined by directly joining. 上記高耐久性可撓管と上記低製造コスト可撓管とが接続筒を介して連結され、上記接続筒は、一方の半部において上記高耐久性可撓管の螺旋管の外周面に接合連結され、他方の半部において上記低製造コスト可撓管の可撓性チューブの内周面に接合連結されている請求項１又は２記載のベビースコープの挿入部可撓管。   The highly durable flexible tube and the low manufacturing cost flexible tube are connected via a connecting tube, and the connecting tube is joined to the outer peripheral surface of the spiral tube of the highly durable flexible tube in one half portion. The baby tube insertion portion flexible tube according to claim 1 or 2, wherein the insertion tube is connected to the inner peripheral surface of the flexible tube of the low manufacturing cost flexible tube in the other half.
JP2005263180A 2005-09-12 2005-09-12 Baby scope insertion section flexible tube Expired - Fee Related JP4708930B2 (en)

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WO2012066849A1 (en) * 2010-11-19 2012-05-24 オリンパスメディカルシステムズ株式会社 Master-slave endoscope system, endoscope
JP5437300B2 (en) * 2011-03-17 2014-03-12 富士フイルム株式会社 Endoscope insertion aid
JP5711072B2 (en) * 2011-08-02 2015-04-30 オリンパスメディカルシステムズ株式会社 Endoscope device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH034466A (en) * 1989-05-31 1991-01-10 Mitsumi Electric Co Ltd Contact pin
JPH05115427A (en) * 1991-10-25 1993-05-14 Olympus Optical Co Ltd Endoscope
JPH09108179A (en) * 1995-10-17 1997-04-28 Asahi Optical Co Ltd Insertion part flexible pipe of baby scope

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH034466A (en) * 1989-05-31 1991-01-10 Mitsumi Electric Co Ltd Contact pin
JPH05115427A (en) * 1991-10-25 1993-05-14 Olympus Optical Co Ltd Endoscope
JPH09108179A (en) * 1995-10-17 1997-04-28 Asahi Optical Co Ltd Insertion part flexible pipe of baby scope

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