JP4953748B2 - Endoscope water nozzle - Google Patents

Endoscope water nozzle Download PDF

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JP4953748B2
JP4953748B2 JP2006273078A JP2006273078A JP4953748B2 JP 4953748 B2 JP4953748 B2 JP 4953748B2 JP 2006273078 A JP2006273078 A JP 2006273078A JP 2006273078 A JP2006273078 A JP 2006273078A JP 4953748 B2 JP4953748 B2 JP 4953748B2
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water
distal end
outlet
tip
observation window
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JP2008086649A (en
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義則 丸山
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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
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00091—Nozzles
    • 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
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00101—Insertion part of the endoscope body characterised by distal tip features the distal tip features being detachable

Description

この発明は内視鏡の送水ノズルに関する。   The present invention relates to a water supply nozzle of an endoscope.

内視鏡の送水ノズルには一般に、挿入部内を通って送られてきた加圧水を挿入部先端の先端部本体に配置された観察窓の表面等に沿って噴出させるための出口流路が形成されている。   In general, the water supply nozzle of the endoscope is formed with an outlet channel for ejecting the pressurized water sent through the insertion portion along the surface of the observation window disposed on the distal end body of the insertion portion. ing.

そのような内視鏡の送水ノズルは、旧来は先端部本体に固定的に設けられていたが、内視鏡使用後の出口流路内等のブラッシング洗浄の必要性等を考慮して、近年は、先端部本体に対して被脱自在な先端キャップと先端部本体との境界面部分に形成されるようになってきている（例えば、特許文献１）。
特許第３４０６７０９ Conventionally, the water supply nozzle of such an endoscope was fixedly provided on the distal end body, but in recent years, considering the necessity of brushing cleaning in the outlet channel after use of the endoscope, etc. Has been formed at the boundary surface portion between the tip cap and the tip body that can be removed from the tip body (for example, Patent Document 1).
Patent No. 3406709

しかし、送水ノズルの出口流路が先端キャップと先端部本体との境界面部分に形成されていると、その境界面の出口流路以外の部分に僅かな隙間が存在する場合（又は存在するようになった場合）に、その隙間から漏洩水が微量ではあるが糸を引くように流出する場合がある。   However, if the outlet flow channel of the water supply nozzle is formed at the boundary surface portion between the tip cap and the tip body, there is a slight gap (or exists) in a portion other than the outlet flow channel on the boundary surface. In some cases, a small amount of leaked water flows out from the gap as if pulling a thread.

すると、ノズルからの噴出水がその側方の漏洩水に引き寄せられて曲げられてしまい、漏洩水のない側への噴出水の広がりが不十分になって、観察窓の表面に洗浄されない領域ができてしまう等の不具合が発生する。   Then, the water ejected from the nozzle is attracted to the side leaked water and bent, and the spread of the jet water to the side without the leaked water becomes insufficient, and there is an area that is not cleaned on the surface of the observation window. Inconveniences such as being able to occur.

なお、出口流路の周囲の隙間からの漏洩水だけでなく、ノズルからの噴出水の流路の傍らに形成された凹凸や重力方向等も、噴出水を側方に引き寄せる水流引き寄せ要素になって同様の不具合発生の原因になる場合がある。   Note that not only the leaked water from the gap around the outlet flow path, but also the unevenness and the direction of gravity, etc. formed beside the flow path of the jet water from the nozzle are the water flow attracting elements that draw the jet water to the side. May cause similar problems.

本発明は、出口開口からの噴出水を側方に引き寄せるように作用する水流引き寄せ要素があっても、噴出水が水流引き寄せ要素の反対側に十分に広がるようにすることができる内視鏡の送水ノズルを提供することを目的とする。   The present invention provides an endoscope capable of sufficiently spreading jet water to the opposite side of the water draw element even if there is a water draw element that acts to draw the jet water from the outlet opening to the side. An object is to provide a water supply nozzle.

上記の目的を達成するため、本発明の内視鏡の送水ノズルは、挿入部内を通って送られてきた加圧水を挿入部の先端部分の表面に沿って噴出させるための出口流路が形成された内視鏡の送水ノズルにおいて、出口流路の出口開口を、その出口開口からの噴出水を側方に引き寄せるように作用する水流引き寄せ要素に対向する方向とは逆方向に、出口流路の向きに対して斜め向きに形成したものである。   In order to achieve the above object, the water supply nozzle of the endoscope of the present invention is formed with an outlet channel for ejecting pressurized water sent through the insertion portion along the surface of the distal end portion of the insertion portion. In the endoscope water supply nozzle, the outlet opening of the outlet channel is arranged in a direction opposite to the direction opposite to the water flow attracting element that acts to draw the water ejected from the outlet opening to the side. It is formed obliquely with respect to the direction.

なお、挿入部の先端部分には、表面に観察窓等が配置された先端部本体と、先端部本体に対して被脱自在な先端キャップとが設けられて、先端部本体とそこに被着された先端キャップとの境界面部分に出口流路が形成されていてもよい。   The distal end portion of the insertion portion is provided with a distal end main body having an observation window or the like disposed on the surface thereof, and a distal end cap that can be removed from the distal end main body. An outlet channel may be formed at a boundary surface with the tip cap.

本発明によれば、出口流路の出口開口を、その出口開口からの噴出水を側方に引き寄せるように作用する水流引き寄せ要素に対向する方向とは逆方向に、出口流路の向きに対して斜め向きに形成したことにより、水流引き寄せ要素があってもノズルからの噴出水が水流引き寄せ要素の反対側に十分に広がるようにすることができる。   According to the present invention, the outlet opening of the outlet channel is directed against the direction of the outlet channel in a direction opposite to the direction facing the water flow attracting element that acts to draw the water ejected from the outlet opening to the side. Thus, even if there is a water flow attracting element, the water ejected from the nozzle can be sufficiently spread to the opposite side of the water flow attracting element.

挿入部内を通って送られてきた加圧水を挿入部の先端部分の表面に沿って噴出させるための出口流路が形成された内視鏡の送水ノズルにおいて、出口流路の出口開口を、その出口開口からの噴出水を側方に引き寄せるように作用する水流引き寄せ要素に対向する方向とは逆方向に、出口流路の向きに対して斜め向きに形成する。   In an endoscope water supply nozzle in which an outlet channel for ejecting pressurized water sent through the insertion portion along the surface of the distal end portion of the insertion portion is formed, an outlet opening of the outlet channel is defined as an outlet thereof. It is formed obliquely with respect to the direction of the outlet channel in a direction opposite to the direction facing the water flow attracting element that acts to draw the water ejected from the opening sideways.

以下、図面を参照して本発明の実施例を説明する。
図２は内視鏡の挿入部１の先端部分の斜視図、図３は平面部分断面図であり、ステンレス鋼又は硬質プラスチック等により形成されて挿入部１の先端に連結された先端部本体２に、弾力性のある電気絶縁性のプラスチック又はゴム材等からなる先端キャップ３が被脱自在に被せられて、その被覆状態が弾力性のあるキャップ固定ピン４等で固定されている。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 2 is a perspective view of the distal end portion of the insertion portion 1 of the endoscope, and FIG. 3 is a plan partial sectional view. Further, a tip cap 3 made of an elastic, electrically insulating plastic or rubber material is detachably covered, and its covering state is fixed by an elastic cap fixing pin 4 or the like.

キャップ固定ピン４は取り外し自在であり、キャップ固定ピン４を取り外すことにより、図４に示されるように、先端部本体２を先端キャップ３内から抜き出して先端キャップ３と分離することができる。   The cap fixing pin 4 is detachable. By removing the cap fixing pin 4, the tip end body 2 can be extracted from the tip cap 3 and separated from the tip cap 3 as shown in FIG. 4.

先端部本体２の側面の表面には、観察窓５と照明窓６が前後に並んで配置されていて、それと並んで形成された溝内に、処置具起上台７が遠隔操作によって揺動させることができるように配置されている。   An observation window 5 and an illumination window 6 are arranged side by side on the surface of the side surface of the distal end main body 2, and the treatment instrument raising base 7 is rocked by remote operation in a groove formed in parallel therewith. Arranged to be able to.

８と９は、挿入部１内に全長にわたって挿通配置された送気管と送水管であり、挿入部１の基端に連結された図示されていない操作部からの操作により、加圧空気又は加圧水が送気管８又は送水管９内に選択的に送られてきて、ノズルの出口開口１０から観察窓５の表面に向かって噴出される。   Reference numerals 8 and 9 denote an air supply pipe and a water supply pipe inserted through the entire length of the insertion portion 1, and pressurized air or pressurized water is operated by an operation from an operation portion (not shown) connected to the proximal end of the insertion portion 1. Is selectively sent into the air supply pipe 8 or the water supply pipe 9 and ejected from the outlet opening 10 of the nozzle toward the surface of the observation window 5.

送気管８と送水管９の先端は、先端部本体２と先端キャップ３との境界面部分に形成された合流路１１に並んで接続されている。図４に示されるように、送気管８及び送水管９の方向と直交する横向きに細長く形成された合流路１１は、先端部本体２に前側部分が開放された形状に形成されている。   The distal ends of the air supply pipe 8 and the water supply pipe 9 are connected side by side in a combined flow path 11 formed at the boundary surface portion between the distal end main body 2 and the distal end cap 3. As shown in FIG. 4, the combined flow path 11 that is elongated in the lateral direction orthogonal to the direction of the air supply pipe 8 and the water supply pipe 9 is formed in a shape in which the front side portion is opened in the tip end body 2.

図３に示されるように、合流路１１の前側開放部分は先端キャップ３で塞がれた状態になっている。したがって、先端キャップ３を先端部本体２から取り外せば、図４に示されるように合流路１１が露出して、合流路１１内と送気管８内及び送水管９内を容易にブラッシング清掃することができる。   As shown in FIG. 3, the front open portion of the combined flow path 11 is closed by the tip cap 3. Therefore, if the tip cap 3 is removed from the tip portion main body 2, the combined flow path 11 is exposed as shown in FIG. 4, and the inside of the combined flow path 11, the air supply pipe 8, and the water supply pipe 9 can be easily brushed and cleaned. Can do.

また、合流路１１の一端側から出口開口１０に真っ直ぐ前方に向かう出口流路１２が先端部本体２と先端キャップ３との境界面部分に形成されて、その出口流路１２の出口が出口開口１０になっている。   In addition, an outlet channel 12 that extends straight from one end side of the combined channel 11 to the outlet opening 10 is formed at the boundary surface portion between the tip body 2 and the tip cap 3, and the outlet of the outlet channel 12 is the outlet opening. It is 10.

そのような出口開口１０と出口流路１２は、図２に示されるように、先端部本体２と先端キャップ３との境界面部分に先端キャップ３側に溝を掘った状態に形成されている。したがって、先端キャップ３を先端部本体２から取り外せば、出口流路１２内を容易にブラッシング清掃することができる。   As shown in FIG. 2, the outlet opening 10 and the outlet channel 12 are formed in a state where a groove is dug on the side of the tip cap 3 in the boundary surface portion between the tip portion main body 2 and the tip cap 3. . Therefore, if the tip cap 3 is removed from the tip portion main body 2, the inside of the outlet channel 12 can be easily brushed and cleaned.

先端部本体２と先端キャップ３は出口流路１２の周囲で境界面どうしが密着するように形成され、送水管９を通って送られてきた加圧水が合流路１１内から出口流路１２内を通って出口開口１０から観察窓５の表面に噴出され、出口開口１０以外の部分からは漏水しないように想定されている。ただし現実には、部品製造上の公差や経時的な変形等によって、出口流路１２の周囲で先端部本体２と先端キャップ３との境界面に極めて僅かではあるが隙間ができてしまう。   The distal end body 2 and the distal end cap 3 are formed so that the boundary surfaces are in close contact with each other around the outlet channel 12, and pressurized water sent through the water supply pipe 9 passes from the inside of the combined channel 11 to the inside of the outlet channel 12. It is assumed that the water is ejected from the exit opening 10 to the surface of the observation window 5 and does not leak from a portion other than the exit opening 10. However, in reality, due to tolerances in manufacturing parts, deformation with time, and the like, a very small gap is formed on the boundary surface between the distal end body 2 and the distal end cap 3 around the outlet channel 12.

この実施例において、出口流路１２は前述のように真っ直ぐ前方に向かって形成されている。しかし、出口開口１０は、出口流路１２の向きに対して斜め向き（この実施例では外方向き）に形成されている。   In this embodiment, the outlet channel 12 is formed straight forward as described above. However, the outlet opening 10 is formed obliquely with respect to the direction of the outlet channel 12 (outward in this embodiment).

図１は、この実施例における送水状態を示しており、送水管９を通って送られてきた加圧水が合流路１１から出口流路１２を通ってその出口開口１０から観察窓５の表面に向けて噴出している。   FIG. 1 shows a water supply state in this embodiment. Pressurized water sent through a water supply pipe 9 passes from a combined flow path 11 through an outlet flow path 12 toward the surface of the observation window 5 from the outlet opening 10. Erupting.

また、出口流路１２以外の部分で先端部本体２と先端キャップ３との境界面にできた隙間を通る漏水Ｘが、出口開口１０からの噴出水の流路の傍らを糸状に前方に流れ、その漏水Ｘは、出口開口１０からの噴出水を側方に引き寄せるように作用する「水流引き寄せ要素」になる。   In addition, the water leakage X passing through the gap formed at the boundary surface between the tip body 2 and the tip cap 3 at a portion other than the outlet channel 12 flows forward in a thread form along the side of the outlet water channel from the outlet opening 10. The water leakage X becomes a “water flow attracting element” that acts to draw the water ejected from the outlet opening 10 to the side.

すると、出口開口１０から噴出した水流を漏水Ｘ側に引き寄せる力が作用するのであるが、出口開口１０が出口流路１２の向きに対して漏水Ｘ（水流引き寄せ要素）に対向する方向とは逆方向（即ち、外向き）の斜め向きに形成されていることにより、出口開口１０から噴出した水流は、噴出後次第に漏水Ｘから遠ざかるほうに曲がって噴出する。   Then, the force that draws the water flow ejected from the outlet opening 10 toward the leakage X side acts, but the direction in which the outlet opening 10 faces the leakage X (water drawing element) with respect to the direction of the outlet channel 12 is reversed. By being formed in an oblique direction (that is, outward), the water flow ejected from the outlet opening 10 is bent and ejected gradually away from the water leakage X after the ejection.

これは、出口開口１０の外端縁部１０ａ付近から噴出した水流Ｙの方が、内端縁部１０ｂ付近から噴出した水流より先に大気中に開放されて失速し、水流に速度差ができることにより発生する現象であり、出口開口１０から噴出する水流が、広がりながら全体として漏水Ｘから遠ざかる外方に向かって進み、漏水Ｘ側に偏って広がる現象が発生しない。その結果、送水動作時に漏水Ｘの発生があっても、観察窓５の表面全体を流水で確実に洗浄することができる。   This is because the water flow Y spouted from the vicinity of the outer edge 10a of the outlet opening 10 is released into the atmosphere earlier than the water spouted from the vicinity of the inner edge 10b and stalls, so that there is a speed difference in the water flow. As a result, the water flow ejected from the outlet opening 10 travels outwardly away from the leaked water X as a whole, and the phenomenon of spreading unevenly toward the leaked X side does not occur. As a result, the entire surface of the observation window 5 can be reliably washed with running water even if water leakage X occurs during the water feeding operation.

また、出口開口１０を斜め向きに削り取った状態に形成することによりその分だけ出口流路１２が短くなれば、合流路１１から出口流路１２に曲がる流路内での渦の発生が少なくなることにより、漏水Ｘ自体が少なくなると同時に、出口流路１２を通過する加圧水の流速が早まって、観察窓５を洗浄する効果が増すメリットもある。   Further, if the outlet channel 12 is shortened by forming the outlet opening 10 in an obliquely cut state, the generation of vortices in the channel that bends from the combined channel 11 to the outlet channel 12 is reduced. As a result, the water leakage X itself is reduced, and at the same time, the flow rate of the pressurized water passing through the outlet channel 12 is increased, and there is an advantage that the effect of cleaning the observation window 5 is increased.

本発明の実施例の内視鏡の送水ノズルからの送水状態を示す内視鏡挿入部先端の平面部分断面図である。It is a plane fragmentary sectional view of the endoscope insertion part front-end | tip which shows the water supply state from the water supply nozzle of the endoscope of the Example of this invention. 本発明の実施例の内視鏡挿入部先端の斜視図である。It is a perspective view of the endoscope insertion part front-end | tip of the Example of this invention. 本発明の実施例の内視鏡挿入部先端の平面部分断面図である。It is a plane fragmentary sectional view of the endoscope insertion part front-end | tip of the Example of this invention. 本発明の実施例の内視鏡挿入部先端から先端キャップが取り外された残りの部分の平面部分断面図である。It is a plane fragmentary sectional view of the remaining part by which the front-end | tip cap was removed from the endoscope insertion part front-end | tip of the Example of this invention.

符号の説明Explanation of symbols

１ 挿入部
２ 先端部本体
３ 先端キャップ
５ 観察窓
９ 送水管
１０ 出口開口
１０ａ 外端縁部
１０ｂ 内端縁部
１１ 合流路
１２ 出口流路
Ｘ 漏水（水流引き寄せ要素） DESCRIPTION OF SYMBOLS 1 Insertion part 2 Tip part main body 3 Tip cap 5 Observation window 9 Water supply pipe 10 Outlet opening 10a Outer edge part 10b Inner edge part 11 Combined flow path 12 Outlet flow path X Water leakage (water flow attracting element)

Claims (1)

側面に観察窓が配置された先端部本体と、上記先端部本体に対して被脱自在な先端キャップとが挿入部の先端部分に設けられて、
上記挿入部内の送水管を通って送られてきた加圧水を上記観察窓の表面に沿って噴出させるための出口流路が、上記送水管に対し側方に偏位して、上記先端部本体とそこに被着された上記先端キャップとの境界面部分に後方から前方に向かって真っ直ぐに形成され、上記送水管を通って送られてきた加圧水の一部が上記先端部本体と上記先端キャップとの間の隙間から漏洩水として上記観察窓の外縁に沿って後方から前方に流れるように構成され、
上記出口流路の出口開口面が、上記出口流路の向きに対し上記観察窓の表面に垂直の方向から見て上記漏洩水に対向する方向とは逆方向の斜め向きに形成されていることを特徴とする内視鏡の送水ノズル。 A distal end portion body having an observation window disposed on the side surface and a distal end cap that is removable with respect to the distal end portion body are provided at the distal end portion of the insertion portion
Outlet passage for ejecting pressurized water sent through the water pipe of the insertion portion along the surface of the observation window, and offset laterally with respect to the water pipes, and the distal end portion main body A part of the pressurized water that is formed straight from the rear to the front at the boundary surface portion with the tip cap attached thereto is sent through the water pipe, and the tip main body and the tip cap It is configured to flow from the rear to the front along the outer edge of the observation window as leaked water from the gap between
The outlet opening surface of the outlet channel is formed in an oblique direction opposite to the direction facing the leaked water when viewed from the direction perpendicular to the surface of the observation window with respect to the direction of the outlet channel . Endoscope water supply nozzle characterized by
JP2006273078A 2006-10-04 2006-10-04 Endoscope water nozzle Expired - Fee Related JP4953748B2 (en)

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