JP4745725B2 - Distal end portion of the endoscope - Google Patents

Distal end portion of the endoscope

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JP4745725B2
JP4745725B2 JP2005171936A JP2005171936A JP4745725B2 JP 4745725 B2 JP4745725 B2 JP 4745725B2 JP 2005171936 A JP2005171936 A JP 2005171936A JP 2005171936 A JP2005171936 A JP 2005171936A JP 4745725 B2 JP4745725 B2 JP 4745725B2
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JP2006345887A (en )
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憲幸 杉田
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Hoya株式会社
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この発明は内視鏡の先端部に関する。 This invention relates to the tip end of the endoscope.

内視鏡には、観察対象粘膜面の汚れや血液等を洗い流すために、挿入部の前方に位置する被写体の方向に向けて水を噴出するための副送水口が配置されたものが少なくない。 The endoscope, in order to wash away the dirt and blood like of the observation target the mucosal surface, is not less that auxiliary water-supply port for ejecting the water in the direction of an object located in front of the insertion portion is arranged . そのような内視鏡においては、従来は、副送水口が単純に前方に向かって開口形成されていた(例えば、特許文献1)。 In such an endoscope, conventionally, auxiliary water-supply port has been opened and formed simply forward (e.g., Patent Document 1).
特開2001−292958、段落〔0014〕 JP 2001-292958, paragraph [0014]

上述のように、副送水口が単純に前方に向かって開口形成された構造では、副送水口から噴出される水が観察視野の中心に向かわないので照準をつけ難く、観察対象粘膜面の汚れや血液等を洗い流す操作に手間がかかる場合がある。 As described above, the auxiliary water-supply port is opened formed simply forward structure, difficult with a sight since water ejected from the auxiliary water-supply port is not directed toward the center of the observation field, dirt of the observation target mucosal surface there is a case in which labor is applied to the operation and wash away the blood or the like.

そこで、副送水口を内視鏡の挿入部の先端に斜め向きに配置することが考えられるが、そのような構成を採ると挿入部の先端内に大きなスペースが必要になるため、他の機能を低下させてしまうことになりかねない。 Accordingly, auxiliary water inlet is considered to be disposed obliquely facing the distal end of the insertion portion of the endoscope, but this would require large space within the distal end of the insertion portion take such a configuration, other functions could lead to that will reduce the.

そこで本発明は、大きなスペースを用いることなく、副送水口から噴出した水を所定の方向に曲げることができる内視鏡の先端部を提供することを目的とする。 The present invention does not use a large space, and to provide a distal portion of the endoscope can be bent water ejected from the auxiliary water inlet in the predetermined direction.

上記の目的を達成するため、本発明の内視鏡の先端部は、挿入部の先端に、挿入部の前方に位置する被写体の方向に向けて水を噴出するための副送水口が配置された内視鏡の先端部において、副送水口から噴出される水を側方に引き寄せてその噴出方向を曲げるように作用をする水流引寄壁を、副送水口の辺縁の外側であってその近傍位置から前方に向かって突設したものである。 To achieve the above object, the distal end portion of the endoscope of the present invention, the distal end of the insertion portion, the sub-water supply port is positioned for injecting water in the direction of an object located in front of the insertion portion at the tip of the endoscope has a water ejected from the auxiliary water-supply port to flow attracting wall that acts to bend the ejection direction attracted laterally, an outer side edge of the auxiliary water-supply port is obtained by projecting forward from its position near.

なお、副送水口が挿入部の先端の軸線と平行方向に真っ直ぐの向きに挿入部の先端面に開口していてもよく、また、内視鏡観察像を取り入れるための観察窓が挿入部の先端面に配置されると共に、水流引寄壁が副送水口と観察窓との間の位置に設けられて、副送水口から噴出される水が水流引寄壁に引き寄せられてその噴出方向が観察窓の前方方向に曲げられるようにしてもよい。 Incidentally, auxiliary water port may be opened to the tip surface of the insertion portion to the tip axis and the direction parallel to the straight direction of the insertion portion, also, an observation window for introducing the endoscopic observation image of the insertion portion while being disposed on the distal end surface, provided in a position between the water attracting wall auxiliary water-supply port and the observation window, the ejection direction of water jetted from the auxiliary water-supply port are attracted to water attracting wall it may be bent in the forward direction of the observation window.

また、水流引寄壁が、挿入部の先端面から前方に突出形成されたピン状体であってもよく、或いは、副送水口が、挿入部の先端面に形成された凹部の底部に形成されていて、水流引寄壁が凹部の側壁部で形成されていてもよく、その場合、側壁部の中の水流引寄壁になる部分が、側壁部の中の他の部分から副送水口の前方寄りの方向に突出した形状に形成されていてもよい。 Further, water attracting walls may from the distal end surface of the insertion portion a pin-like member which is protruded forwardly, or formed on the bottom of the recess which auxiliary water-supply port, formed in the end surface of the insertion portion have been, water attracting wall may be formed by the side wall of the recess, in which case the water attracting wall comprising portions in the side wall portion, the sub-water supply port from the other parts in the side wall portion of it may be formed in a shape protruding in the direction of the front portion.

本発明によれば、副送水口から噴出される水が、副送水口の辺縁の外側であってその近傍位置から前方に向かって突設された水流引寄壁に引き寄せられてその噴出方向が曲げられるので、大きなスペースを用いることなく、副送水口から噴出した水を所定の方向に曲げることができ、水を観察視野の中心方向に向けて噴出させることができる。 According to the present invention, the water ejected from the auxiliary water-supply port, the ejection direction an outer side edge of the auxiliary water-supply port from its vicinity are attracted to the projected water stream attracting wall toward the front since being bent, without using a large space, the water ejected from the auxiliary water-supply port can be bent in a predetermined direction, it can be ejected toward the water toward the center of the observation field.

挿入部の先端に、挿入部の前方に位置する被写体の方向に向けて水を噴出するための副送水口が配置された内視鏡の先端部において、副送水口から噴出される水を側方に引き寄せてその噴出方向を曲げるように作用をする水流引寄壁を、副送水口の辺縁の外側であってその近傍位置から前方に向かって突設する。 The distal end of the insertion portion, the distal portion of the endoscope auxiliary water-supply ports are arranged for ejecting the water in the direction of an object located in front of the insertion portion, the side water ejected from the auxiliary water-supply port It attracts towards the water attracting wall that acts to bend the ejection direction, a outer edge of the auxiliary water-supply port to project forward from its position near.

図面を参照して本発明の実施例を説明する。 With reference to the accompanying drawings illustrating the embodiment of the present invention.
図2は本発明の第1の実施例の内視鏡の先端部を示しており、可撓管状の挿入部1の先端に連結された先端部本体2の先端面2aに、内視鏡観察像を取り入れるための観察窓3と、観察範囲に向かって照明光を放射するための照明窓4が並んで配置されている。 Figure 2 is a first embodiment shows the distal end of the endoscope, the distal end surface 2a of the flexible tubular insertion portion 1 of the ligated end shell at the tip 2 of the present invention, the endoscope observation an observation window 3 for taking an image, are arranged illumination window 4 is lined for emitting illumination light toward the observation range. 5は処置具突出口、6は、観察窓3の表面に向かって開口配置された送気送水ノズルである。 5 treatment instrument projection port, 6 is a gas-feeding and water-feeding nozzle which is opened disposed toward the surface of the observation window 3.

7は、観察対象粘膜面の汚れや血液等を洗い流すために、挿入部1の前方に位置する被写体の方向に向けて水を噴出するための副送水口であり、先端部本体2の先端面2aに前方に向けて真っ直ぐに開口する状態に配置されている。 7, in order to wash away the dirt and blood like of the observation target the mucosal surface, in the direction of an object located in front of the insertion portion 1 a by-water supply port for ejecting the water, the distal end surface of the distal end portion main body 2 They are arranged in a state of straight open toward the forward 2a.

また、副送水口7から噴出される水を副送水口7から噴出した直後の位置で側方に引き寄せてその噴出方向を曲げるための水流引寄壁8が、副送水口7に隣接して副送水口7の前方に添う状態に先端部本体2の先端面2aに固定的に突設されている。 Further, water attracting wall 8 for bending the ejection direction attract water ejected from the auxiliary water inlet 7 laterally position immediately ejected from the auxiliary water-supply port 7, adjacent to the auxiliary water-supply port 7 sub to the state accompany the forward water supply port 7 is fixedly projected from the distal end surface 2a of the distal end portion main body 2.

図1は内視鏡の先端部の側面断面図であり、観察窓3の後方位置の先端部本体2内には対物光学系9が配置され、その対物光学系9による被写体の投影位置に固体撮像素子10の撮像面が配置されていて、先端部本体2の真っ直ぐ前方が内視鏡観察される。 Figure 1 is a side sectional view of the distal end of the endoscope, is in the distal end portion main body 2 of the rear position observation window 3 is arranged the objective optical system 9, solid projection position of the object by the objective optical system 9 have been arranged imaging surface of the imaging device 10, the straight front end shell 2 is observed endoscope. 11は、処置具突出口5に連通接続された処置具挿通チャンネルである。 11 is a treatment instrument insertion channel that is communicatively connected to the treatment instrument projection port 5.

12は、先端部本体2の軸線と平行方向に先端部本体2に貫通形成された通水孔であり、その後端には挿入部1内に挿通配置された送水チューブ13が接続され、通水孔12の先端開口部分が副送水口7になっている。 12 is a water passage hole formed through the axial direction parallel to the distal end portion main body 2 of the tip body 2, the water supply tube 13 that is inserted and arranged in the insertion portion 1 is connected at its rear end, passing water tip opening portion of the hole 12 is in the auxiliary water-supply port 7. 通水孔12の断面形状は正円形であり、その断面形状のまま真っ直ぐ副送水口7として開口している。 Cross-sectional shape of the water passage holes 12 are positive circular, and opens a straight auxiliary water-supply port 7 remains in its cross-sectional shape.

水流引寄壁8は、副送水口7の辺縁の近傍であって副送水口7と観察窓3との間の位置に真っ直ぐ前方に向けて突設されており、この実施例では断面形状が正円形のピン状体が用いられている(以下、本実施例においては「ピン状体8」という)。 Water attracting wall 8 is protruded straight forward at a position between the A near the edge of the auxiliary water-supply port 7 and the auxiliary water-supply port 7 and the observation window 3, the cross-sectional shape in this embodiment There a round pin-like member is used (hereinafter, in the present embodiment referred to as "pin-shaped body 8").

その結果、副送水口7から噴出される噴出水Wが、先端部本体2の先端面2aから突出したピン状体8に引き寄せられて、噴出水Wの噴出方向が観察窓3の前方方向に曲げられ、観察視野の中央付近で被写体を洗浄することができる。 As a result, jetting water W ejected from the auxiliary water-supply port 7, are attracted to the pin-shaped body 8 protruding from the distal end surface 2a of the distal end portion main body 2, the forward direction of the ejection direction viewing window 3 of the water jet W bent, it is possible to clean the object in the vicinity of the center of the observation field.

このとき、噴出水Wは噴出方向が曲げられても水流が広がったりせず、副送水口7の径をそのまま維持した状態で曲げられるので、粘膜表面の汚物や血液等を強力に洗浄することができる。 At this time, water jet W does not spread or water flow be bent is ejection direction, since the diameter of the auxiliary water-supply port 7 is bent in a state in which it maintains, to strongly washed filth and blood such mucosal surfaces can. なお、噴出水Wの曲がり角度は5°〜30°程度の範囲である。 Incidentally, bending angle of the jetting water W is in the range of about 5 ° to 30 °.

このように、本来は噴出水Wが真っ直ぐ前方に噴出される副送水口7の前方を遮らずに、噴出水Wの本来の噴出方向に対して平行にピン状体8を突出させることにより噴出水Wがピン状体8に引き寄せられて曲がるのは、ピン状体8と平行に流体(噴出水W)が流れることによりその間の部分が負圧になって噴出水Wがピン状体8側に寄せられ、それによって噴出水Wがピン状体8に触れると、その後は水の表面張力により噴出水Wがピン状体8にくっついた状態になることによると思われる。 Thus, originally without blocking the front of the auxiliary water-supply port 7 water jet W is straight ejected forward ejection by causing parallel projected pin-shaped body 8 with respect to the original ejection direction of the ejection water W the water W bends are attracted to the pin-shaped body 8, a pin-shaped body 8 in parallel with the fluid (water jet W) jetting water W in between portions a negative pressure by the flow pin-shaped body 8 side provided by, the, thereby ejecting water W touch the pin-shaped body 8, then seems to be due to a state where water jet W is stuck to the pin-shaped body 8 by the surface tension of water.

図3及び図4は、ピン状体8と副送水口7との間の間隔eを変化させた場合に、副送水口7からのピン状体8の突出長Lをどの程度にすると噴出水Wが曲がるかを実験したときの実験結果を示しており、ピン状体8の直径dはd=0.33mm、副送水口7の直径DはD=0.5mmである。 3 and 4, in the case of changing the distance e between the pin-shaped body 8 and auxiliary water-supply port 7, and the protruding length L of the pin-shaped body 8 from auxiliary water inlet 7 to what extent water jet W indicates the experimental results when experiments or bends, the diameter d of the pin-shaped body 8 d = 0.33 mm, the diameter D of the auxiliary water-supply port 7 is D = 0.5 mm.

この実験結果から、ピン状体8と副送水口7との間の間隔eが0.5mmを越えない(e≦0.5mm)範囲にある必要があり、eが0.25mm以下では噴出水Wの状態が不安定でピン状体8がほとんど突出していなくても噴出水Wが曲がったりするので、ピン状体8と副送水口7との間の間隔eは0.3mm〜0.5mmの範囲に設定するのが望ましい。 From the experimental results, the spacing e between the pin-shaped body 8 and the auxiliary water supply port 7 does not exceed 0.5 mm (e ≦ 0.5 mm) must be in the range, water jet in e is 0.25mm or less since W state unstable pin-like member 8 is bent or jetting water W even if not almost protruding spacing e between the pin-shaped body 8 and the auxiliary water supply port 7 0.3mm~0.5mm it is desirable to set the range of.

図5及び図6は本発明の第2の実施例の内視鏡の先端部を示しており、先端部本体2の先端面2aに形成された凹部2bの底部に副送水口7を形成して、その凹部2bの側面を、噴出水Wを引き寄せる水流引寄壁8′にしたものである。 5 and 6 a second embodiment shows the distal end of the endoscope, the auxiliary water-supply port 7 is formed in the bottom of the recess 2b formed on the distal end surface 2a of the distal end portion main body 2 of the present invention Te, the sides of the recess 2b, is obtained by the water attracting wall 8 'to draw the water jet W. このように構成しても、副送水口7から噴出する水が水流引寄壁8′側に引き寄せられて観察窓3の前方方向に曲げられ、第1の実施例と同様の効果を得ることができる。 Thus be constituted, auxiliary water-supply port 7 water ejected from the bent forward direction of the observation window 3 is attracted to the water attracting wall 8 'side, to obtain the same effect as the first embodiment can.

図7及び図8は本発明の第3の実施例を示しており、先端部本体2の先端面2aに形成された凹部2bの底部に副送水口7が形成されている点は上述の第2の実施例と同様であるが、噴出水Wを引き寄せる水流引寄壁8″になる凹部2bの側壁の中央部分が、側壁の他の部分に比べて副送水口7の前方寄りに突出した形状に形成されている。その結果、噴出水Wが横振れすることなく観察窓3の前方方向に向かって正確に曲げられる。 7 and 8 show a third embodiment of the present invention, it is that the bottom of the recess 2b formed on the distal end surface 2a of the distal end portion main body 2 auxiliary water-supply port 7 is formed above the it is similar to the second embodiment, but the central portion of the side wall of the recess 2b to be water attracting wall 8 "to draw the jetting water W, protrudes as compared with other portions of the side wall to the front side of the auxiliary water-supply port 7 is formed in a shape. as a result, it is accurately bent forward direction of the observation window 3 without ejecting water W is shake horizontal.

なお、本発明は上記実施例に限定されるものではなく、例えば副送水口7から噴出される噴出水の曲がり方向が観察窓3の前方方向でない場合であっても本発明を適用することができる。 The present invention is not limited to the above embodiments, be applied to even present invention in a case for example bending direction of the jet water ejected from the auxiliary water-supply port 7 is not the forward direction of a viewing window 3 it can.

本発明の第1の実施例の内視鏡の先端部の側面断面図である。 It is a side cross-sectional view of the distal end portion of the endoscope of the first embodiment of the present invention. 本発明の第1の実施例の内視鏡の先端部の斜視図である。 It is a perspective view of a distal portion of the endoscope of the first embodiment of the present invention. 本発明の第1の実施例の副送水口とピン状体との間の間隔と副送水口から噴出する噴出水の曲がり発生との関係を明らかにする実験に用いられた内視鏡の先端部の部分側面断面図である。 The distal end of the first embodiment of the auxiliary water-supply port and the pin-shaped body with an endoscope that the relation between the distance and the ejection of the water bending occurs jetted from the sub water feed port was used to reveal the experiment between the present invention it is a partial side sectional view of the parts. 本発明の第1の実施例の副送水口とピン状体との間の間隔と副送水口から噴出する噴出水の曲がり発生との関係を明らかにする実験結果を示す図表である。 It is a table showing the first embodiment intervals and clarify the experimental results the relationship between the bending occurrence of jetting water jetting from the secondary water supply port between the auxiliary water-supply opening and the pin-shaped body of the present invention. 本発明の第2の実施例の内視鏡の先端部の斜視図である。 It is a perspective view of a distal end portion of the endoscope of the second embodiment of the present invention. 本発明の第2の実施例の内視鏡の先端部の側面断面図である。 It is a side cross-sectional view of the distal end portion of the endoscope of the second embodiment of the present invention. 本発明の第3の実施例の内視鏡の先端部の斜視図である。 It is a perspective view of the distal end portion of the third embodiment the endoscope of the present invention. 本発明の第3の実施例の内視鏡の先端部の正面図である。 It is a front view of the tip of the third embodiment the endoscope of the present invention.

符号の説明 DESCRIPTION OF SYMBOLS

1 挿入部 2 先端部本体 2a 先端面 2b 凹部 3 観察窓 7 副送水口 8 ピン状体(水流引寄壁) 1 insertion portion 2 the distal end section body 2a tip end face 2b recess 3 observation window 7 auxiliary water-supply port 8 pin-shaped body (water attracting wall)
8′、8″ 水流引寄壁 12 通水孔 W 噴出水 8 ', 8 "water attracting wall 12 water passage holes W spouting water

Claims (3)

  1. 挿入部の先端に、上記挿入部の前方に位置する被写体の方向に向けて水を噴出するための送水口が配置された内視鏡の先端部において、 The distal end of the insertion portion, the distal portion of the endoscope water supply port is positioned for injecting water in the direction of an object located in front of the insertion portion,
    上記送水口が、上記挿入部の先端面に形成された凹部の底部に形成されると共に、上記送水口の辺縁の外側であってその近傍位置から前方に向かって突出することにより上記送水口から噴出される水を側方に引き寄せてその噴出方向を曲げるように作用をする水流引寄壁が、上記凹部の側壁部で形成されていることを特徴とする内視鏡の先端部。 The water supply port is formed in a bottom of the recess formed in the end surface of the insertion portion, the water supply port by projecting forward from its position near an outer edge of the water supply port distal portion of the endoscope water attracting wall that acts to bend the ejection direction attract water ejected laterally, characterized in that it is formed by the side wall of the recess from.
  2. 上記送水口が上記挿入部の先端の軸線と平行方向に真っ直ぐの向きに上記挿入部の先端面に開口している請求項1記載の内視鏡の先端部。 Distal end portion of the endoscope according to claim 1, wherein said water supply inlet is open to the distal end surface of the insertion portion into a straight orientation parallel to the axis direction of the distal end of the insertion portion.
  3. 内視鏡観察像を取り入れるための観察窓が上記挿入部の先端面に配置されると共に、上記水流引寄壁が上記送水口と上記観察窓との間の位置に設けられて、上記送水口から噴出される水が上記水流引寄壁に引き寄せられてその噴出方向が上記観察窓の前方方向に曲げられる請求項1又は2記載の内視鏡の先端部。 With an observation window for taking endoscopic observation image is arranged on the distal end surface of the insertion portion, the water attracting wall provided at a position between the water supply port and the observation window, the water supply port distal end portion of the endoscope of water according to claim 1 or 2, wherein the ejection direction is bent in a forward direction of the observation window is attracted to the water attracting walls ejected from.
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US11422721 US8016753B2 (en) 2005-06-09 2006-06-07 Endoscope
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