JP2003019106A - Endoscope tip - Google Patents
Endoscope tipInfo
- Publication number
- JP2003019106A JP2003019106A JP2001207662A JP2001207662A JP2003019106A JP 2003019106 A JP2003019106 A JP 2003019106A JP 2001207662 A JP2001207662 A JP 2001207662A JP 2001207662 A JP2001207662 A JP 2001207662A JP 2003019106 A JP2003019106 A JP 2003019106A
- Authority
- JP
- Japan
- Prior art keywords
- distal end
- endoscope
- light guide
- fiber bundle
- base
- 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
Links
Landscapes
- Endoscopes (AREA)
Abstract
(57)【要約】
【課題】先端部本体と湾曲部との間の高周波電流に対す
る絶縁性をより確実にして電気安全性を高めた内視鏡の
先端部を提供すること。
【解決手段】先端部本体２のうち湾曲部１と連結される
後端寄りの部分２ａが電気絶縁材によって形成され、そ
の部分２ａを通過するライトガイドファイババンドル１
４に金属製の口金１５が被嵌された内視鏡の先端部にお
いて、少なくとも先端部本体２の後端寄りの電気絶縁材
２ａの部分内に位置する部分において、ライトガイドフ
ァイババンドル１４の口金１５の外周面に電気絶縁処理
１６を施した。
(57) [Problem] To provide a distal end portion of an endoscope in which insulation between a distal end portion main body and a curved portion with respect to a high-frequency current is further ensured to improve electrical safety. A portion (2a) of a distal end body (2) near a rear end connected to a curved portion (1) is formed of an electrically insulating material, and a light guide fiber bundle (1) passing through the portion (2a).
In the distal end portion of the endoscope in which the metal base 15 is fitted to the base 4, at least the base of the light guide fiber bundle 14 at a portion located within the portion of the electrical insulating material 2 a near the rear end of the main body 2. 15 was subjected to electrical insulation treatment 16.
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は内視鏡の先端部に
関する。
【０００２】
【従来の技術】近年は、内視鏡を利用した高周波処置が
広く行われるようになったことにより、内視鏡の先端部
は先端部本体のうち湾曲部と連結される後端寄りの部分
が電気絶縁材によって形成され、先端部本体の金属部に
漏洩した高周波電流が湾曲部から可撓管を通って手元側
まで伝達されないようになっている。
【０００３】また、内視鏡の照明光を伝達するライトガ
イドファイババンドルは一般に、多数の光学ファイバを
安定した状態に束ねるために、端部付近では金属製の口
金に光学ファイバの束を通して接合してある。
【０００４】そして、先端部本体の後端寄りの電気絶縁
材によって形成された部分にはライトガイドファイババ
ンドルの金属製口金が通る溝を形成し、その溝内に電気
絶縁性の接着剤を充填して金属製口金と湾曲部側の部材
との間を電気絶縁し、先端部本体から湾曲部に高周波電
流が伝わらないようにしている。
【０００５】
【発明が解決しようとする課題】しかし、そのような接
着剤の充填は必ずしも完全に行い難く、外側から見えな
い気泡等が充填部に存在すると、ライトガイドファイバ
バンドルの口金と湾曲部側との間の電気絶縁性が不完全
になって、先端部本体から手元側に高周波電流が伝わる
おそれがある。
【０００６】そこで本発明は、先端部本体と湾曲部との
間の高周波電流に対する絶縁性をより確実にして電気安
全性を高めた内視鏡の先端部を提供することを目的とす
る。
【０００７】
【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡の先端部は、先端部本体のうち湾曲
部と連結される後端寄りの部分が電気絶縁材によって形
成され、その部分を通過するライトガイドファイババン
ドルに金属製の口金が被嵌された内視鏡の先端部におい
て、少なくとも先端部本体の後端寄りの電気絶縁材の部
分内に位置する部分において、ライトガイドファイババ
ンドルの口金の外周面に電気絶縁処理を施したものであ
る。
【０００８】
【発明の実施の形態】図面を参照して本発明の実施例を
説明する。図１は内視鏡の挿入部の先端部分を示してお
り、図２はそのII−II断面図である。
【０００９】図示されていない挿入部可撓管の先端部分
に遠隔操作によって湾曲自在に設けられた湾曲部１の先
端に、観察窓６や照明窓７等が配置された先端部本体２
が連結されている。
【００１０】湾曲部１を形成する湾曲管は、ステンレス
鋼管製の複数の節輪をリベット１０で回動自在に順に連
結して構成されている。１１は最先端の節輪、１２はゴ
ムチューブ等からなる外皮である。
【００１１】観察窓６の内側には対物光学系８が配置さ
れていて、その対物光学系８による被写体の投影位置に
固体撮像素子９の撮像面が配置されている。照明窓７の
内側には、ライトガイドファイババンドル１４の射出端
が配置されている。
【００１２】先端部本体２は導電性のあるステンレス鋼
製であり、湾曲部１の最先端の節輪１１との電気的導通
を避けるために、先端部本体２のうち湾曲部１と連結さ
れる後端寄りの部分は導電性のないプラスチック製の絶
縁連結部材２ａによって形成され、その絶縁連結部材２
ａに対して最先端の節輪１１が連結されている。
【００１３】また、先端部本体２が外表面に直接露出し
ないようにするために、導電性のないプラスチック製の
先端キャップ３が先端部本体２の外表面を覆う状態に取
り付けられている。
【００１４】先端部本体２と絶縁連結部材２ａには、ラ
イトガイドファイババンドル１４を通すための溝２１，
２２が一つながりに形成されている。そして、その溝２
１，２２内に位置する部分では、ライトガイドファイバ
バンドル１４は、多数の光学ファイバが金属製の口金１
５内に通されて結束、接合されている。
【００１５】その溝２１，２２内には例えばエポキシ樹
脂系のような電気絶縁性のよい充填接着剤２３が充填さ
れているが、絶縁連結部材２ａ内に位置する部分では、
口金１５の外周面に例えばシリコンチューブ又は四フッ
化エチレン樹脂チューブ等のような電気絶縁性のよい絶
縁チューブ１６が密着して被覆接合され、その外側の空
間に充填接着剤２３が充填されている。
【００１６】したがって、充填接着剤２３に気泡などが
あって充填接着剤２３だけでは口金１５と最先端の節輪
１１との間の電気絶縁が保証されないような場合でも、
絶縁チューブ１６によってその間の電気絶縁が保証され
る。
【００１７】なお、絶縁チューブ１６は少なくとも絶縁
連結部材２ａ内に位置する部分において口金１５に密着
被覆されていればよく、絶縁チューブ１６に代えて、電
気絶縁性のよいエラストマ等を口金１５にコーティング
してもよい。
【００１８】
【発明の効果】本発明によれば、先端部本体のうち湾曲
部と連結される後端寄りの部分が電気絶縁材によって形
成され、その部分を通過するライトガイドファイババン
ドルに金属製の口金が被嵌された内視鏡の先端部におい
て、少なくとも先端部本体の後端寄りの電気絶縁材の部
分内に位置する部分において、ライトガイドファイババ
ンドルの口金の外周面に電気絶縁処理を施したことによ
り、金属製の先端部本体と湾曲部側の部材との間の電気
絶縁性がより確実になり優れた電気安全性を確保するこ
とができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end portion of an endoscope. 2. Description of the Related Art In recent years, high-frequency treatment using an endoscope has been widely performed, and the end of the endoscope has a rear end connected to a curved portion of a main body of the endoscope. The closer part is formed of an electrical insulating material, so that the high-frequency current leaked to the metal part of the distal end body is not transmitted from the bending part to the hand side through the flexible tube. In general, a light guide fiber bundle for transmitting illumination light from an endoscope is generally formed by joining a bundle of optical fibers to a metal base near an end in order to bundle a large number of optical fibers in a stable state. It is. A groove through which a metal base of the light guide fiber bundle passes is formed in a portion formed by the electric insulating material near the rear end of the front end body, and an electric insulating adhesive is filled in the groove. As a result, electrical insulation is provided between the metal base and the member on the bending portion side, so that high-frequency current is not transmitted from the distal end body to the bending portion. [0005] However, it is not always possible to completely fill such an adhesive, and if air bubbles or the like that cannot be seen from the outside are present in the filling portion, the base and the curved portion of the light guide fiber bundle are bent. There is a risk that high-frequency current will be transmitted from the distal end body to the hand side due to imperfect electrical insulation between the side. Accordingly, an object of the present invention is to provide a distal end portion of an endoscope in which insulation between a distal end portion main body and a curved portion with respect to a high-frequency current is further ensured and electrical safety is enhanced. In order to achieve the above object, the distal end portion of the endoscope according to the present invention is configured such that a portion of the distal end body near the rear end connected to the curved portion is electrically insulated. In the distal end portion of the endoscope in which the metal base is fitted to the light guide fiber bundle formed of the material and passing through the portion, the distal end portion is located at least in the portion of the electrically insulating material near the rear end of the distal end body. In the portion, the outer peripheral surface of the base of the light guide fiber bundle is subjected to electrical insulation treatment. Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a distal end portion of an insertion portion of the endoscope, and FIG. 2 is a sectional view taken along line II-II. A distal end body 2 in which an observation window 6, an illumination window 7 and the like are disposed at a distal end of a bending portion 1 which is provided on a distal end portion of an insertion portion flexible tube (not shown) by remote control so as to be freely bent.
Are connected. The bending tube forming the bending portion 1 is constituted by connecting a plurality of node rings made of a stainless steel pipe in order by a rivet 10 so as to be freely rotatable. Reference numeral 11 denotes a state-of-the-art node ring, and reference numeral 12 denotes an outer cover made of a rubber tube or the like. An objective optical system 8 is arranged inside the observation window 6, and an imaging surface of a solid-state imaging device 9 is arranged at a position where the objective optical system 8 projects a subject. The emission end of the light guide fiber bundle 14 is arranged inside the illumination window 7. The distal end main body 2 is made of conductive stainless steel, and is connected to the bending portion 1 of the distal end main body 2 in order to avoid electrical conduction with the node ring 11 at the forefront of the bending portion 1. The portion near the rear end is formed by a non-conductive plastic insulating connecting member 2a.
The leading edge ring 11 is connected to a. In order to prevent the tip main body 2 from being directly exposed to the outer surface, a non-conductive plastic tip cap 3 is attached so as to cover the outer surface of the tip main body 2. A groove 21 for passing the light guide fiber bundle 14 is provided in the distal end body 2 and the insulating connecting member 2a.
22 are formed in a series. And the groove 2
1 and 22, the light guide fiber bundle 14 has a large number of optical fibers formed of a metal base 1.
5 and are bound and joined. The grooves 21 and 22 are filled with a filling adhesive 23 having good electrical insulation such as an epoxy resin, for example. In the portion located in the insulating connecting member 2a,
An insulating tube 16 having good electrical insulation, such as a silicon tube or a tetrafluoroethylene resin tube, is closely adhered to and bonded to the outer peripheral surface of the base 15, and the space outside the tube is filled with a filling adhesive 23. . Therefore, even if the filling adhesive 23 has air bubbles and the like and the filling adhesive 23 alone does not guarantee electrical insulation between the base 15 and the state-of-the-art node ring 11,
The insulation tube 16 ensures electrical insulation therebetween. The insulating tube 16 only needs to be tightly coated on the base 15 at least at a portion located inside the insulating connecting member 2a. Instead of the insulating tube 16, an elastomer or the like having good electrical insulation is coated on the base 15. May be. According to the present invention, the portion of the distal end body near the rear end connected to the curved portion is formed of an electrically insulating material, and the light guide fiber bundle passing through the portion is made of metal. In the distal end portion of the endoscope fitted with the base, at least at a portion located within the portion of the electrical insulating material near the rear end of the main body of the end portion, the outer peripheral surface of the base of the light guide fiber bundle is subjected to electrical insulation treatment. With this arrangement, the electrical insulation between the metal tip portion main body and the member on the curved portion side becomes more reliable, and excellent electrical safety can be secured.
【図面の簡単な説明】
【図１】本発明の実施例の内視鏡の先端部の側面断面図
である。
【図２】本発明の実施例の図１におけるII−II断面図で
ある。
【符号の説明】
１ 湾曲部
２ 先端部本体
２ａ 絶縁連結部材
１１ 最先端の節輪
１４ ライトガイドファイババンドル
１５ 口金
１６ 絶縁チューブ（電気絶縁処理）
２１，２２ 溝
２３ 充填接着剤BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a distal end portion of an endoscope according to an embodiment of the present invention. FIG. 2 is a sectional view taken along the line II-II in FIG. 1 of the embodiment of the present invention. [Description of Signs] 1 Bending portion 2 Tip main body 2a Insulating connecting member 11 State-of-the-art node ring 14 Light guide fiber bundle 15 Base 16 Insulating tube (electric insulation treatment) 21, 22 Groove 23 Filling adhesive
Claims (1)
寄りの部分が電気絶縁材によって形成され、その部分を
通過するライトガイドファイババンドルに金属製の口金
が被嵌された内視鏡の先端部において、 少なくとも上記先端部本体の後端寄りの上記電気絶縁材
の部分内に位置する部分において、上記ライトガイドフ
ァイババンドルの口金の外周面に電気絶縁処理を施した
ことを特徴とする内視鏡の先端部。Claims: 1. A portion of a front end main body near a rear end connected to a curved portion is formed of an electrically insulating material, and a metal base is provided on a light guide fiber bundle passing through the portion. At the distal end portion of the fitted endoscope, at least a portion located in a portion of the electrical insulating material near the rear end of the distal end body, electrically insulates an outer peripheral surface of a base of the light guide fiber bundle. A distal end portion of the endoscope, wherein the end portion is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001207662A JP4634661B2 (en) | 2001-07-09 | 2001-07-09 | End of the endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001207662A JP4634661B2 (en) | 2001-07-09 | 2001-07-09 | End of the endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003019106A true JP2003019106A (en) | 2003-01-21 |
| JP4634661B2 JP4634661B2 (en) | 2011-02-16 |
Family
ID=19043614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001207662A Expired - Fee Related JP4634661B2 (en) | 2001-07-09 | 2001-07-09 | End of the endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4634661B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111035350A (en) * | 2019-12-30 | 2020-04-21 | 常州延顺光电科技有限公司 | Preparation method of snake bone device of endoscope |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07323001A (en) * | 1994-05-31 | 1995-12-12 | Olympus Optical Co Ltd | Endoscope |
| JPH0852138A (en) * | 1994-08-12 | 1996-02-27 | Fuji Photo Optical Co Ltd | Body cavity inside diagnosis apparatus |
| JPH10192219A (en) * | 1997-01-13 | 1998-07-28 | Asahi Optical Co Ltd | Electronic endoscope tip |
| JPH10229971A (en) * | 1997-02-19 | 1998-09-02 | Asahi Optical Co Ltd | Electronic endoscope |
| JP2001000388A (en) * | 1999-06-21 | 2001-01-09 | Asahi Optical Co Ltd | Endoscope |
-
2001
- 2001-07-09 JP JP2001207662A patent/JP4634661B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07323001A (en) * | 1994-05-31 | 1995-12-12 | Olympus Optical Co Ltd | Endoscope |
| JPH0852138A (en) * | 1994-08-12 | 1996-02-27 | Fuji Photo Optical Co Ltd | Body cavity inside diagnosis apparatus |
| JPH10192219A (en) * | 1997-01-13 | 1998-07-28 | Asahi Optical Co Ltd | Electronic endoscope tip |
| JPH10229971A (en) * | 1997-02-19 | 1998-09-02 | Asahi Optical Co Ltd | Electronic endoscope |
| JP2001000388A (en) * | 1999-06-21 | 2001-01-09 | Asahi Optical Co Ltd | Endoscope |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111035350A (en) * | 2019-12-30 | 2020-04-21 | 常州延顺光电科技有限公司 | Preparation method of snake bone device of endoscope |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4634661B2 (en) | 2011-02-16 |
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