JP4424795B2 - End of the endoscope - Google Patents

End of the endoscope Download PDF

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Publication number
JP4424795B2
JP4424795B2 JP31328899A JP31328899A JP4424795B2 JP 4424795 B2 JP4424795 B2 JP 4424795B2 JP 31328899 A JP31328899 A JP 31328899A JP 31328899 A JP31328899 A JP 31328899A JP 4424795 B2 JP4424795 B2 JP 4424795B2
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Prior art keywords
lens
hydrophilic coating
distal end
end portion
observation window
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JP2001128933A (en
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雅弘 高野
隆之 荻野
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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
    • A61B1/00096—Optical 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
    • A61B1/12—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 with cooling or rinsing arrangements
    • A61B1/126—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 with cooling or rinsing arrangements provided with means for cleaning in-use
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2423—Optical details of the distal end
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • Surgery (AREA)
  • Medical Informatics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Astronomy & Astrophysics (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Description

【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】
内視鏡の観察窓には、対物光学系の第１レンズが表面を外面に露出させた状態で取り付けられているが、その表面は体腔内の粘液等の付着によって汚される。そこで、第１レンズの表面はノズルで水を吹き付けて洗浄できるようになっており、送水洗浄後はさらに空気を吹き付けて、レンズ表面に残った水滴を吹き飛ばせるようになっている。
【０００３】
【発明が解決しようとする課題】
しかし、実際には水滴が吹き飛ばされずにレンズ表面に残ってしまい、観察の妨げになる場合が少なくない。
【０００４】
そこで従来は、例えば実開昭５１−１０９１９０号公報等に記載されているように、観察窓を囲む周囲の壁面を粗面に形成して、レンズ表面の水滴が周囲の壁面側に引き寄せられるようにしたものがある。
【０００５】
しかし、そのように単に壁面を粗面に形成しただけの構成では、現実には水滴を移動させるほどの作用が生じないので、レンズ表面に残った水滴によって観察が妨げられる場合が少なくなかった。
【０００６】
そこで本発明は、レンズ表面に付着した水滴が観察視野外に排除され易くして、良好な観察像を得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。
【０００７】
【課題を解決するための手段】
上記の課題を解決するため、本発明の内視鏡の先端部は、先端部本体に配置された観察窓の表面に向けて水を噴出する送水ノズルが設けられた内視鏡の先端部において、観察窓に取り付けられた対物光学系第１レンズの表面の光学的有効径以外の部分に、親水性の塗装又は親水性のコーティングを施したものである。
【０００８】
なお、親水性の塗装又は親水性のコーティングが、対物光学系第１レンズの表面の光学的有効径以外の部分のほぼ全体に施されていてもよい。
また、観察窓の表面に向けて空気を噴出する送気ノズルが設けられていて、対物光学系第１レンズの表面のうちの送気ノズルから遠い方の部分にのみ施されていてもよい。
【０００９】
また、親水性の塗装又は親水性のコーティングの親水性が、対物光学系第１レンズの表面の光学的有効径に遠い部分より近い部分の方が強くなっていてもよい。
【００１０】
また、本発明の内視鏡の先端部は、先端部本体に配置された観察窓の表面に向けて水を噴出する送水ノズルが設けられた内視鏡の先端部において、先端部本体の観察窓の周囲の部分の表面に、親水性の塗装又は親水性のコーティングを施したものである。
【００１１】
そして、親水性の塗装又は親水性のコーティングが、先端部本体の観察窓の周囲の部分のほぼ全周部分に施されていてもよい。
また、観察窓の表面に向けて空気を噴出する送気ノズルが設けられていて、先端部本体の観察窓の周囲の部分のうちの送気ノズルから遠い方の部分にのみ施されていてもよい。
【００１２】
また、親水性の塗装又は親水性のコーティングの親水性が、観察窓に遠い部分より近い部分の方が強くなっていてもよい。
【００１３】
【発明の実施の形態】
図面を参照して本発明の実施の形態を説明する。
図２は、側方視型内視鏡の挿入部の先端部分を示している。
【００１４】
金属製の先端部本体１の外表面を覆うように、電気絶縁性の先端キャップ２が取り付けられており、観察窓３と照明窓４が、先端部本体１の側面に側方に向けて配置されている。
【００１５】
照明窓４には、凹レンズからなる配光レンズ５が照明窓４を水密に塞ぐ状態に固着されており、その裏面側には照明用ライトガイドファイババンドル６の射出端面が配置されている。
【００１６】
観察窓３には、凹レンズからなる対物光学系第１レンズ１１が観察窓３を水密に塞ぐ状態に固着されており、第１レンズ１１の表面は外面に露出している。なお、第１レンズ１１は度のない平行平面板を含むものである。
【００１７】
第１レンズ１１の裏面にはダハプリズム１２が接合されている。ダハプリズム１２の後方に配置された第２レンズ群１３と第１レンズ１１とは光軸が一致しており、これら第１レンズ１１、ダハプリズム１２及び第２レンズ群１３によって対物光学系が構成されている。
【００１８】
第２レンズ群１３の後方には、イメージガイドファイババンドル７の入射端面が配置されており、第１レンズ１１の前方の被写体が配光レンズ５から放射される照明光により照明され、その被写体の像がイメージガイドファイババンドル７の入射端面に結像して後方に伝達される。
【００１９】
第１レンズ１１の近傍には、送気送水ノズル８が開口を後方から第１レンズ１１の表面に向けて配置されており、送気送水チューブ９を通って選択的に送られてくる空気と水を、第１レンズ１１の表面に吹き付けることができる。
【００２０】
第１レンズ１１は、ダハプリズム１２を接合する必要性から、図３に示されるように四隅を丸めた長方形状に形成されており、その第１レンズ１１の外表面には、光学的有効径１１ａ以外の部分の全体に親水性処理Ａが施されている。
【００２１】
親水性処理Ａとしては、第１レンズ１１の外表面に、例えば親水性ポリマー微粒子を添加した合成樹脂塗料のような親水性の塗装を施す、又は、例えば酸化チタン光触媒膜（例えば東陶機器（株）製商品名「ハイドロテクト」（登録商標））のような親水性のコーティングを施す、等の処理がある。
【００２２】
このように構成された実施の形態の内視鏡の先端部においては、図２に示されるように第１レンズ１１の外表面に水滴５０が付着すると、それが第１レンズ１１の外縁付近より内側にあっても光学的有効径１１ａの付近又はそれより外側にあれば、図１に示されるように、親水性処理Ａが施されている部分に水滴５０が引き寄せられて、光学的有効径１１ａの外側に排除され、観察視野を妨げない状態になる。
【００２３】
図４は、本発明の第２の実施の形態の観察窓３部分の平面図であり、第１の実施の形態と同様の親水性処理Ａを、光学的有効径１１ａとの間に若干の間隔をあけて施したものである。このようにすることにより、光学的有効径１１ａ内から親水性処理Ａ部分に排除された水滴が観察範囲に全く触れない状態になる。
【００２４】
図５は、本発明の第３の実施の形態の観察窓３部分の平面図であり、親水性処理Ａを、第１レンズ１１の表面のうちの送気送水ノズル８から遠い方の部分にのみ施したものである。このようにすると、第１レンズ１１の表面に付着した水滴が送気送水ノズル８から遠い方へ排除され、送気時に第１レンズ１１の表面に戻ってこない。
【００２５】
図６は、本発明の第４の実施の形態の観察窓３部分の平面図であり、親水性処理Ａの親水性を、光学的有効径１１ａに近い部分と遠い部分とで差をつけ、光学的有効径１１ａに近い部分の親水性を強くしたものである。このようにすることにより、光学的有効径１１ａ内に付着した水滴がその外側に排除され易くなる。
【００２６】
図７と図８は、本発明の親水性処理Ａを前方視型内視鏡の先端部本体１の先端壁面に施した例を示しており、図７は、親水性処理Ａを送気送水ノズル８から遠い方の部分にのみ施した例、図８は、親水性処理Ａの親水性を、観察窓３に近い部分と遠い部分とで差をつけ、観察窓３に近い部分の親水性を強くしたものである。このような構成によっても、観察窓３の表面の水滴をその外側に排除することができる。
【００２７】
【発明の効果】
本発明によれば、観察窓に取り付けられた対物光学系第１レンズの表面の光学的有効径以外の部分、又は先端部本体の観察窓の周囲の部分の表面に、親水性の塗装又は親水性のコーティングを施したので、レンズ表面に付着した水滴が観察視野外に排除され易くなり、鮮明で良好な観察像を得ることができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態の内視鏡の先端部の第１レンズ表面の水滴が排除されつつある状態の側面断面図である。
【図２】本発明の第１の実施の形態の内視鏡の先端部の側面断面図である。
【図３】本発明の第１の実施の形態の内視鏡の先端部の観察窓部分の平面図である。
【図４】本発明の第２の実施の形態の内視鏡の先端部の観察窓部分の平面図である。
【図５】本発明の第３の実施の形態の内視鏡の先端部の観察窓部分の平面図である。
【図６】本発明の第４の実施の形態の内視鏡の先端部の観察窓部分の平面図である。
【図７】本発明の第５の実施の形態の内視鏡の先端部の先端部本体の正面図である。
【図８】本発明の第６の実施の形態の内視鏡の先端部の先端部本体の正面図である。
【符号の説明】
Ａ 親水性処理
１ 先端部本体
３ 観察窓
４ 照明窓
８ 送気送水ノズル
１１ 第１レンズ
１１ａ 光学的有効径
１２ ダハプリズム
１３ 第２レンズ群
５０ 水滴[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distal end portion of an endoscope.
[0002]
[Prior art]
The first lens of the objective optical system is attached to the observation window of the endoscope with the surface exposed to the outer surface, but the surface is soiled by adhesion of mucus or the like in the body cavity. Therefore, the surface of the first lens can be cleaned by spraying water with a nozzle, and after the water supply cleaning, air is further sprayed so that water droplets remaining on the lens surface can be blown away.
[0003]
[Problems to be solved by the invention]
However, in reality, water drops are not blown off and remain on the lens surface, which often hinders observation.
[0004]
Therefore, conventionally, as described in, for example, Japanese Utility Model Publication No. 51-109190, the peripheral wall surface surrounding the observation window is formed to be a rough surface so that water droplets on the lens surface are attracted to the peripheral wall surface side. There is something that was made.
[0005]
However, in such a configuration in which the wall surface is simply formed as a rough surface, the action of moving the water droplet does not actually occur, and thus the water droplet remaining on the lens surface often prevents the observation.
[0006]
Therefore, an object of the present invention is to provide a distal end portion of an endoscope in which water droplets adhering to the lens surface can be easily removed out of the observation field of view and a good observation image can be obtained.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the distal end portion of the endoscope of the present invention is provided at the distal end portion of the endoscope provided with a water supply nozzle that ejects water toward the surface of an observation window disposed in the distal end portion main body. A portion other than the optical effective diameter of the surface of the first lens of the objective optical system attached to the observation window is provided with a hydrophilic coating or a hydrophilic coating.
[0008]
Note that hydrophilic coating or hydrophilic coating may be applied to almost the entire portion of the surface of the objective optical system first lens other than the optically effective diameter.
In addition, an air supply nozzle that ejects air toward the surface of the observation window may be provided, and may be provided only on a portion of the surface of the objective optical system first lens far from the air supply nozzle.
[0009]
Further, the hydrophilic paint or the hydrophilic coating may be stronger in a portion closer to the surface of the objective optical system first lens than a portion far from the effective optical diameter.
[0010]
Further, the distal end portion of the endoscope according to the present invention is configured to observe the distal end portion main body at the distal end portion of the endoscope provided with a water supply nozzle that ejects water toward the surface of the observation window disposed in the distal end portion main body. The surface of the peripheral part of the window is provided with a hydrophilic paint or a hydrophilic coating.
[0011]
And hydrophilic painting or hydrophilic coating may be given to the substantially perimeter part of the peripheral part of the observation window of the front-end | tip part main body.
In addition, an air supply nozzle that ejects air toward the surface of the observation window is provided, and even if it is applied only to a portion far from the air supply nozzle of the peripheral portion of the observation window of the tip body. Good.
[0012]
Further, the hydrophilic property of the hydrophilic coating or the hydrophilic coating may be stronger at a portion closer to the observation window than at a portion far from the observation window.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the distal end portion of the insertion portion of the side-view type endoscope.
[0014]
An electrically insulating tip cap 2 is attached so as to cover the outer surface of the tip portion main body 1 made of metal, and the observation window 3 and the illumination window 4 are arranged on the side surface of the tip portion main body 1 sideways. Has been.
[0015]
A light distribution lens 5 made of a concave lens is fixed to the illumination window 4 so as to block the illumination window 4 in a watertight manner, and an exit end face of the illumination light guide fiber bundle 6 is disposed on the back side thereof.
[0016]
An objective optical system first lens 11 made of a concave lens is fixed to the observation window 3 so as to close the observation window 3 in a watertight manner, and the surface of the first lens 11 is exposed to the outside. The first lens 11 includes a parallel plane plate having no degree.
[0017]
A roof prism 12 is bonded to the back surface of the first lens 11. The optical axes of the second lens group 13 and the first lens 11 arranged behind the roof prism 12 are the same, and the objective optical system is constituted by the first lens 11, roof prism 12, and second lens group 13. Yes.
[0018]
An incident end face of the image guide fiber bundle 7 is disposed behind the second lens group 13, and a subject in front of the first lens 11 is illuminated with illumination light emitted from the light distribution lens 5. An image is formed on the incident end face of the image guide fiber bundle 7 and transmitted backward.
[0019]
In the vicinity of the first lens 11, an air / water supply nozzle 8 is disposed with its opening directed from the rear toward the surface of the first lens 11, and air selectively sent through the air / water supply tube 9 and Water can be sprayed on the surface of the first lens 11.
[0020]
The first lens 11 is formed in a rectangular shape with rounded four corners as shown in FIG. 3 because of the necessity to join the roof prism 12, and an optically effective diameter 11a is formed on the outer surface of the first lens 11. A hydrophilic treatment A is applied to the entire portion other than.
[0021]
The hydrophilic treatment A, the outer surface of the first lens 11, for example, subjected to a hydrophilic coating, such as a synthetic resin coating with added hydrophilic polymer microparticles, or, for example, titanium oxide photocatalyst film (e.g. TOTO ( There are treatments such as applying a hydrophilic coating such as “HYDROTECT” (registered trademark) ).
[0022]
In the distal end portion of the endoscope of the embodiment configured as described above, when a water droplet 50 adheres to the outer surface of the first lens 11 as shown in FIG. 2, it is from the vicinity of the outer edge of the first lens 11. If it is in the vicinity of the optical effective diameter 11a or outside the optical effective diameter 11a even if it is inside, as shown in FIG. 1, the water droplet 50 is attracted to the portion to which the hydrophilic treatment A is applied, and the optical effective diameter It is excluded outside 11a, and the observation visual field is not disturbed.
[0023]
FIG. 4 is a plan view of the observation window 3 portion according to the second embodiment of the present invention, and a hydrophilic treatment A similar to that of the first embodiment is slightly applied between the optical effective diameter 11a. It was given at intervals. By doing so, the water droplets excluded from the optically effective diameter 11a to the hydrophilic treatment A portion do not touch the observation range at all.
[0024]
FIG. 5 is a plan view of the observation window 3 portion according to the third embodiment of the present invention, in which the hydrophilic treatment A is applied to a portion of the surface of the first lens 11 far from the air / water supply nozzle 8. It is only given. If it does in this way, the water droplet adhering to the surface of the 1st lens 11 will be excluded to the far side from the air / water supply nozzle 8, and will not return to the surface of the 1st lens 11 at the time of air supply.
[0025]
FIG. 6 is a plan view of the observation window 3 portion according to the fourth embodiment of the present invention, in which the hydrophilicity of the hydrophilic treatment A is differentiated between a portion near the optical effective diameter 11a and a portion far from the optical effective diameter 11a. The hydrophilicity of the portion close to the optical effective diameter 11a is strengthened. By doing in this way, it becomes easy to exclude the water droplet adhering in the optical effective diameter 11a to the outer side.
[0026]
7 and 8 show an example in which the hydrophilic treatment A of the present invention is applied to the distal end wall surface of the distal end main body 1 of the front-view endoscope. FIG. 7 shows the hydrophilic treatment A by air / water supply. FIG. 8 shows an example in which only the portion farther from the nozzle 8 is applied, and FIG. 8 shows the hydrophilicity of the portion near the observation window 3 by differentiating the hydrophilicity of the hydrophilic treatment A between the portion near the observation window 3 and the portion far from the observation window 3 Is a strong one. Even with such a configuration, water droplets on the surface of the observation window 3 can be excluded to the outside.
[0027]
【The invention's effect】
According to the present invention, hydrophilic coating or hydrophilicity is applied to the surface of the surface of the objective optical system first lens attached to the observation window other than the optical effective diameter, or to the surface of the peripheral portion of the distal end main body. Since the water-resistant coating is applied, water droplets adhering to the lens surface are easily removed out of the observation field, and a clear and good observation image can be obtained.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a state in which water droplets on the surface of a first lens at the distal end portion of an endoscope according to a first embodiment of the present invention are being removed.
FIG. 2 is a side sectional view of the distal end portion of the endoscope according to the first embodiment of the present invention.
FIG. 3 is a plan view of an observation window portion at a distal end portion of the endoscope according to the first embodiment of the present invention.
FIG. 4 is a plan view of an observation window portion at a distal end portion of an endoscope according to a second embodiment of the present invention.
FIG. 5 is a plan view of an observation window portion at a distal end portion of an endoscope according to a third embodiment of the present invention.
FIG. 6 is a plan view of an observation window portion at a distal end portion of an endoscope according to a fourth embodiment of the present invention.
FIG. 7 is a front view of a distal end body of a distal end portion of an endoscope according to a fifth embodiment of the present invention.
FIG. 8 is a front view of a distal end body of a distal end portion of an endoscope according to a sixth embodiment of the present invention.
[Explanation of symbols]
A Hydrophilic treatment 1 Tip body 3 Observation window 4 Illumination window 8 Air / water supply nozzle 11 First lens 11a Optical effective diameter 12 Dach prism 13 Second lens group 50 Water droplets

Claims (6)

先端部本体に配置された観察窓に対物光学系第１レンズが取り付けられて、その対物光学系第１レンズの表面に向けて水を噴出する送水ノズルが設けられた内視鏡の先端部において、
上記対物光学系第１レンズの表面の光学的有効径以外の部分に、親水性の塗装又は親水性のコーティングが施され、
上記親水性の塗装又は親水性のコーティングの親水性が、上記対物光学系第１レンズの表面の光学的有効径に遠い部分より近い部分の方が強くなっていることを特徴とする内視鏡の先端部。At the distal end portion of the endoscope in which an objective optical system first lens is attached to an observation window disposed in the distal end portion main body, and a water supply nozzle that ejects water toward the surface of the objective optical system first lens is provided. ,
The optically effective diameter or outer portion of the surface of the upper Symbol pair thereof optics first lens, hydrophilic coating or a hydrophilic coating is facilities,
An endoscope characterized in that the hydrophilic property of the hydrophilic coating or the hydrophilic coating is stronger at a portion closer to the surface of the first lens of the objective optical system than a portion far from the effective optical diameter. The tip of the. 上記親水性の塗装又は親水性のコーティングが、上記対物光学系第１レンズの表面の光学的有効径以外の部分のほぼ全体に施されている請求項１記載の内視鏡の先端部。The distal end portion of the endoscope according to claim 1, wherein the hydrophilic coating or the hydrophilic coating is applied to almost the entire portion of the surface of the objective optical system first lens other than the optically effective diameter. 上記対物光学系第１レンズの表面に向けて空気を噴出する送気ノズルが設けられていて、上記親水性の塗装又は親水性のコーティングが、上記対物光学系第１レンズの表面のうちの上記送気ノズルから遠い方の部分にのみ施されている請求項１記載の内視鏡の先端部。An air supply nozzle that ejects air toward the surface of the objective optical system first lens is provided, and the hydrophilic coating or the hydrophilic coating is the surface of the objective optical system first lens. The distal end portion of the endoscope according to claim 1, which is applied only to a portion far from the air supply nozzle. 先端部本体に配置された観察窓に対物光学系第１レンズが取り付けられて、その対物光学系第１レンズの表面に向けて水を噴出する送水ノズルが設けられた内視鏡の先端部において、
上記先端部本体の上記観察窓の周囲の部分の表面に、親水性の塗装又は親水性のコーティングが施され、
上記親水性の塗装又は親水性のコーティングの親水性が、上記観察窓に遠い部分より近い部分の方が強くなっていることを特徴とする内視鏡の先端部。At the distal end portion of the endoscope in which an objective optical system first lens is attached to an observation window disposed in the distal end portion main body, and a water supply nozzle that ejects water toward the surface of the objective optical system first lens is provided. ,
On the surface of a portion of the periphery of the observation window of the distal end portion main body, a hydrophilic coating or a hydrophilic coating is facilities,
The distal end portion of an endoscope, wherein the hydrophilic coating or the hydrophilic coating is stronger in a portion closer to the observation window than a portion far from the observation window . 上記親水性の塗装又は親水性のコーティングが、上記先端部本体の上記観察窓の周囲の部分のほぼ全周部分に施されている請求項４記載の内視鏡の先端部。The distal end portion of the endoscope according to claim 4 , wherein the hydrophilic coating or the hydrophilic coating is applied to substantially the entire peripheral portion of the periphery of the observation window of the distal end portion main body. 上記対物光学系第１レンズの表面に向けて空気を噴出する送気ノズルが設けられていて、上記親水性の塗装又は親水性のコーティングが、上記先端部本体の上記観察窓の周囲の部分のうちの上記送気ノズルから遠い方の部分にのみ施されている請求項４記載の内視鏡の先端部。An air supply nozzle for ejecting air toward the surface of the objective optical system first lens is provided, and the hydrophilic coating or the hydrophilic coating is formed on a portion around the observation window of the tip body. The distal end portion of the endoscope according to claim 4, which is applied only to a portion farther from the air supply nozzle.
JP31328899A 1999-11-04 1999-11-04 End of the endoscope Expired - Lifetime JP4424795B2 (en)

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