JPH1142201A - Front end of small diameter forward observation endoscope - Google Patents
Front end of small diameter forward observation endoscopeInfo
- Publication number
- JPH1142201A JPH1142201A JP9202676A JP20267697A JPH1142201A JP H1142201 A JPH1142201 A JP H1142201A JP 9202676 A JP9202676 A JP 9202676A JP 20267697 A JP20267697 A JP 20267697A JP H1142201 A JPH1142201 A JP H1142201A
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- hole
- distal end
- observation optical
- illumination optical
- 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)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、前方視型細径内
視鏡の先端部に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forward-looking small-diameter endoscope.
【0002】[0002]
【従来の技術】前方視型内視鏡の挿入部の先端に連結さ
れた先端部本体には、観察光学系を収容するための観察
光学系収容穴と照明光学系を収容するための照明光学系
収容穴とが、軸線と平行方向に全長にわたって穿設され
ている。2. Description of the Related Art A distal end body connected to the distal end of an insertion portion of a forward-looking endoscope has an observation optical system housing hole for housing an observation optical system and an illumination optical system for housing an illumination optical system. A system accommodation hole is formed over the entire length in a direction parallel to the axis.
【0003】[0003]
【発明が解決しようとする課題】しかし、極細径の内視
鏡の場合には、観察光学系収容穴及び照明光学系収容穴
共に非常に細い穴になるので、先端部本体への加工の際
に穴が途中で曲がったり変形することがあって加工が容
易ではない。また、観察光学系や照明光学系と穴の内周
面との接着も不完全なものになりがちで、接着による固
定とシールの信頼性が低かった。However, in the case of an endoscope having a very small diameter, both the observation optical system accommodating hole and the illumination optical system accommodating hole are very small holes. The hole may be bent or deformed on the way, making it difficult to process. In addition, the adhesion between the observation optical system or the illumination optical system and the inner peripheral surface of the hole tends to be incomplete, and the reliability of the fixation and the seal by the adhesion is low.
【0004】そこで本発明は、観察光学系収容穴と照明
光学系収容穴を先端部本体に正確に形成することがで
き、且つ先端部本体に対する観察光学系及び照明光学系
の接着を高い信頼性で行うことができる前方視型細径内
視鏡の先端部を提供することを目的とする。Accordingly, the present invention enables the observation optical system housing hole and the illumination optical system housing hole to be accurately formed in the distal end body, and provides a highly reliable bonding of the observation optical system and the illumination optical system to the distal end body. It is an object of the present invention to provide a distal end portion of a forward-looking small-diameter endoscope that can be performed by using the above method.
【0005】[0005]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の前方視型細径内視鏡の先端部は、挿入部の
先端に連結された円柱状の先端部本体に、観察光学系収
容穴と照明光学系収容穴とが形成された前方視型細径内
視鏡の先端部において、上記観察光学系収容穴を上記先
端部本体の軸線方向に平行な円形の断面形状の穴により
形成して、上記照明光学系収容穴を、内側縁が上記観察
光学系収容穴の縁部の外側に沿い外側縁が上記先端部本
体の外周の内側に沿う曲がり長穴によって形成すると共
に、上記先端部本体の後端から全長の四分の一ないし二
分の一の範囲を、上記観察光学系収容穴と上記照明光学
系収容穴とが内部に開口する筒状に形成して、その筒状
部内の空間に接着剤を充填したことを特徴とする。In order to achieve the above object, the distal end of the forward-looking small-diameter endoscope according to the present invention is provided with a cylindrical distal end body connected to the distal end of the insertion section. At the distal end of the forward-looking small-diameter endoscope in which the optical system housing hole and the illumination optical system housing hole are formed, the observation optical system housing hole has a circular cross-sectional shape parallel to the axial direction of the body of the front end. The illumination optical system accommodating hole is formed by a curved elongated hole whose inner edge extends along the outside of the edge of the observation optical system accommodating hole, and whose outer edge extends along the inner periphery of the distal end body. A quarter to one-half range of the total length from the rear end of the tip main body is formed in a tubular shape in which the observation optical system housing hole and the illumination optical system housing hole are opened. It is characterized in that a space inside the cylindrical portion is filled with an adhesive.
【0006】なお、上記筒状部内に観察光学系としての
イメージガイドファイバと照明光学系としてのライトガ
イドファイバが通っていてもよく、上記筒状部が上記先
端部本体の後端から全長の略三分の一の範囲に形成され
ていてもよい。また、上記挿入部に挿通されている内蔵
物が観察光学系と照明光学系だけであってもよい。[0006] An image guide fiber as an observation optical system and a light guide fiber as an illumination optical system may pass through the cylindrical portion. It may be formed in one third of the range. Further, only the observation optical system and the illumination optical system may be incorporated into the insertion portion.
【0007】[0007]
【発明の実態の形態】図面を参照して本発明の実施の形
態を説明する。図4は、親スコープの処置具挿通チャン
ネルに挿脱して使用される子スコープ40を示してお
り、操作部41の下端部に挿入部42の基端が連結され
ている。挿入部42の直径は例えば2mm程度であり、
その長さ(有効長)は後述する外套シース20の全長よ
り長く形成されている。43は接眼部、44は、図示さ
れていない光源装置に接続されるライトガイドコネクタ
である。Embodiments of the present invention will be described with reference to the drawings. FIG. 4 shows a child scope 40 which is used by being inserted into and removed from the treatment tool insertion channel of the parent scope, and a base end of an insertion section 42 is connected to a lower end of an operation section 41. The diameter of the insertion portion 42 is, for example, about 2 mm,
The length (effective length) is formed to be longer than the entire length of the outer sheath 20 described later. 43 is an eyepiece, and 44 is a light guide connector connected to a light source device (not shown).
【0008】図1は、子スコープ40の挿入部42の先
端部分を示している。挿入部42は、全長にわたって可
撓性チューブ46で外装されていて、その先端に先端部
本体47が連結されている。FIG. 1 shows the distal end of the insertion section 42 of the child scope 40. The insertion section 42 is covered with a flexible tube 46 over the entire length, and a distal end main body 47 is connected to a distal end thereof.
【0009】この子スコープは、図2にも示されるよう
に、観察窓48と照明窓51とが先端部本体47の先端
面に配置されて、先端部本体47の前方を観察するよう
にした前方視型の内視鏡であり、観察窓48の内側に配
置された対物光学系49による被写体の結像位置にイメ
ージガイドファイバ50の入射端面が配置されている。In this child scope, as shown in FIG. 2, an observation window 48 and an illumination window 51 are disposed on the distal end surface of the distal end main body 47, and the front of the distal end main body 47 is observed. This is a forward-looking endoscope, and an incident end face of an image guide fiber 50 is arranged at a position where an object is imaged by an objective optical system 49 arranged inside an observation window 48.
【0010】照明窓51の内側には、プラスチック製の
ライトガイドファイバ52の射出端が配置されていて、
その前面には、ライトガイドファイバ52から射出され
る照明光の配光を良くし且つファイバ端面を保護するた
めのガラス製のビーズ53が配置されている。An emission end of a light guide fiber 52 made of plastic is disposed inside the illumination window 51.
A glass bead 53 for improving the light distribution of the illumination light emitted from the light guide fiber 52 and protecting the end face of the fiber is disposed on the front surface.
【0011】本発明の子スコープ40は、胆管等に挿入
するためにガイドワイヤーを使う必要がないので、III
−III断面を示す図3に示されるように、可撓性チュー
ブ46の内部にはガイドワイヤーを通すためのチャンネ
ルの類が設けられておらず、イメージガイドファイバ5
0とライトガイドファイバ52だけが通されている。The child scope 40 of the present invention does not require the use of a guide wire for insertion into a bile duct or the like.
As shown in FIG. 3 showing a section taken along the line III, no channel or the like for passing a guide wire is provided inside the flexible tube 46, and the image guide fiber 5
Only 0 and the light guide fiber 52 are passed.
【0012】図1に戻って、先端部本体47は円柱状の
金属(例えばステンレス鋼)を素材としていて、後半部
は可撓性チューブ46の先端部分が被覆接着される分だ
け外径寸法が細く形成されている。Returning to FIG. 1, the distal end body 47 is made of a columnar metal (for example, stainless steel), and the rear half of the distal end body 47 has an outer diameter dimension corresponding to the covering and bonding of the distal end portion of the flexible tube 46. It is formed thin.
【0013】そして、先端部本体47の後端から全長の
略三分の一の範囲は、図3に示されるように外周部によ
って囲まれる肉厚の薄い円筒形の断面形状の筒状部47
aに形成されている。As shown in FIG. 3, the cylindrical portion 47 having a thin cylindrical shape and having a thin cross-sectional shape is surrounded by an outer peripheral portion, as shown in FIG.
a.
【0014】そして、先端部本体47の筒状部47aよ
り先側の部分には、対物光学系49とイメージガイドフ
ァイバ50とによって構成される観察光学系が収容され
る観察光学系収容穴55と、ビーズ53とライトガイド
ファイバ52とによって構成される照明光学系が収容さ
れる照明光学系収容穴56とが先端部本体47の軸線と
平行方向に形成されている。An observation optical system accommodation hole 55 for accommodating an observation optical system constituted by the objective optical system 49 and the image guide fiber 50 is provided in a portion of the tip end main body 47 on the front side of the cylindrical portion 47a. An illumination optical system accommodation hole 56 for accommodating an illumination optical system constituted by the beads 53 and the light guide fibers 52 is formed in a direction parallel to the axis of the distal end main body 47.
【0015】観察光学系収容穴55は、後端が筒状部4
7a内に開口する断面形状が円形の穴であり、先側の半
部内には対物光学系49が内蔵され、後側の半部にはイ
メージガイドファイバ50の入射端部が挿通固着されて
いる。この観察光学系収容穴55は、先端部本体47の
中心軸線に対して偏心して位置しており、その最も外側
に寄った縁部が筒状部47aの内周面に接する位置にあ
る。The rear end of the observation optical system housing hole 55 has a cylindrical portion 4.
The cross-sectional shape of the opening 7a is a circular hole, the objective optical system 49 is built in the front half, and the incident end of the image guide fiber 50 is inserted and fixed in the rear half. . The observation optical system housing hole 55 is located eccentrically with respect to the center axis of the distal end main body 47, and its outermost edge is located at a position in contact with the inner peripheral surface of the cylindrical portion 47a.
【0016】照明光学系収容穴56は、内側縁が観察光
学系収容穴55の縁部の外側に沿い外側縁が筒状部47
aの内周面に沿う円弧状に曲がった形状の曲がり長穴で
あり、ライトガイドファイバ52の先端部分が挿通固着
されてその先端部分にビーズ53が内蔵されていて、後
端が筒状部47a内に開口している。The illumination optical system accommodating hole 56 has an inner edge extending along the outer edge of the observation optical system accommodating hole 55 and an outer edge having a cylindrical portion 47.
a light guide fiber 52 is inserted and fixed at the distal end thereof, a bead 53 is built in at the distal end, and the rear end is a cylindrical portion. 47a.
【0017】したがって、筒状部47a内にはイメージ
ガイドファイバ50とライトガイドファイバ52が引き
通されており、筒状部47aの空間内には接着剤59が
充填されている。その結果、筒状部47a内においてイ
メージガイドファイバ50とライトガイドファイバ52
が先端部本体47に対して確実に接着されている。Therefore, the image guide fiber 50 and the light guide fiber 52 are passed through the cylindrical portion 47a, and the adhesive 59 is filled in the space of the cylindrical portion 47a. As a result, the image guide fiber 50 and the light guide fiber 52 in the cylindrical portion 47a.
Is securely adhered to the tip main body 47.
【0018】このように構成された前方視型細径内視鏡
の先端部の先端部本体47は、微細な穴である観察光学
系収容穴55と照明光学系収容穴56が形成されている
部分が先側から全長の略三分の二の範囲と短いので、途
中における穴の曲がりや変形が極めて小さくて正確に加
工することができる。The distal end body 47 at the distal end of the forward-looking small-diameter endoscope having such a configuration is formed with observation optical system accommodation holes 55 and illumination optical system accommodation holes 56, which are minute holes. Since the portion is as short as approximately two-thirds of the total length from the front side, bending and deformation of the hole in the middle are extremely small, and the hole can be machined accurately.
【0019】また、接着剤59を確実に充填するだけの
空間がある筒状部47aにおいて先端部本体47に対す
るイメージガイドファイバ50とライトガイドファイバ
52の接着が行われているので、強固で信頼性の高い固
定とシールが行われる。Further, since the image guide fiber 50 and the light guide fiber 52 are bonded to the distal end main body 47 in the cylindrical portion 47a having a space for securely filling the adhesive 59, the solidity and the reliability are improved. High fixing and sealing are performed.
【0020】図5は、子スコープ40を使用する前段階
として、親スコープ10を介して胆管100内に造影剤
注入チューブ30の先端を差し込んで、胆管100内に
造影剤を注入する状態を示している。FIG. 5 shows a state in which the tip of the contrast medium injection tube 30 is inserted into the bile duct 100 through the parent scope 10 and a contrast medium is injected into the bile duct 100 as a pre-stage of using the child scope 40. ing.
【0021】親スコープ10は、側方視型のいわゆる十
二指腸ファイバースコープあり、操作部11に可撓管状
の挿入部12が連結されていて、操作部11からの遠隔
操作によって屈曲自在な湾曲部13が挿入部12の先端
部分に連結され、対物光学系等が内蔵された先端部本体
14が湾曲部13の先端に連結されている。The parent scope 10 is a so-called duodenal fiber scope of a side view type, in which a flexible tubular insertion portion 12 is connected to an operation portion 11, and a bending portion 13 which is bendable by remote operation from the operation portion 11. Is connected to the distal end of the insertion section 12, and a distal end body 14 having an objective optical system and the like built therein is connected to the distal end of the bending section 13.
【0022】処置具類を挿通するための処置具挿通チャ
ンネルが挿入部12と湾曲部13の内部を通って配置さ
れており、その処置具挿入口15は操作部11の下部に
突設され、処置具出口16は先端部本体14の側面に開
口形成されている。A treatment tool insertion channel for inserting treatment tools is disposed through the inside of the insertion portion 12 and the curved portion 13, and the treatment tool insertion port 15 is provided at a lower portion of the operation portion 11. The treatment tool outlet 16 is formed on the side surface of the distal end body 14 with an opening.
【0023】造影剤注入チューブ30は処置具挿通チャ
ンネル内に直接通されているのではなく、造影剤注入チ
ューブ30の可撓性チューブ31部分が外套シース20
に通され、造影剤注入チューブ30の基端部に設けられ
た手元口金32が外套シース20の基端部に設けられた
手元口金22と結合されて、造影剤注入チューブ30と
外套シース20とが一体になった状態で用いられる。The contrast medium injection tube 30 is not directly passed through the treatment instrument insertion channel, but the flexible tube 31 of the contrast medium injection tube 30 is connected to the outer sheath 20.
Is passed through, and the base 32 provided at the base end of the contrast agent injection tube 30 is connected to the base 22 provided at the base end of the outer sheath 20, and the contrast agent injection tube 30 and the outer sheath 20 are connected to each other. Are used in an integrated state.
【0024】外套シース20の有効長(即ち、可撓性チ
ューブ21の長さ)は処置具挿通チャンネルの全長より
長く形成されていて、可撓性チューブ21を処置具挿入
口15から処置具挿通チャンネル内にいっぱいに差し込
めば、可撓性チューブ21の先端部分21aが処置具出
口16から例えば5〜10cm程度突出する長さに形成
されている。The effective length of the mantle sheath 20 (that is, the length of the flexible tube 21) is formed to be longer than the entire length of the treatment instrument insertion channel, and the flexible tube 21 is inserted through the treatment instrument insertion port 15 to insert the treatment instrument. When the flexible tube 21 is fully inserted into the channel, the distal end portion 21a of the flexible tube 21 is formed to have a length protruding from the treatment instrument outlet 16 by, for example, about 5 to 10 cm.
【0025】しかし、外套シース20が造影剤注入チュ
ーブ30と結合して使用される状態では、造影剤注入チ
ューブ30の可撓性チューブ31の先端部分が処置具出
口16から突出して胆管100内に差し込まれた位置に
あるときに、外套シース20の可撓性チューブ21の先
端部分21aが湾曲部13の根元の直前に位置するよう
に、外套シース20の可撓性チューブ21と造影剤注入
チューブ30の可撓性チューブ31との長さの差が設定
されている。However, in a state where the sheath 20 is used in combination with the contrast medium injection tube 30, the distal end portion of the flexible tube 31 of the contrast medium injection tube 30 projects from the treatment instrument outlet 16 into the bile duct 100. When in the inserted position, the flexible tube 21 of the outer sheath 20 and the contrast medium injection tube are so positioned that the distal end portion 21 a of the flexible tube 21 of the outer sheath 20 is located immediately before the root of the curved portion 13. The length difference between the flexible tube 31 and the flexible tube 31 is set.
【0026】このような状態で造影剤注入チューブ30
の可撓性チューブ31の先端が胆管100内に挿入され
ていて、造影剤注入チューブ30の手元口金32に突設
された注入口金33から造影剤を注入することにより、
その造影剤を胆管100内に送り出して、胆管100の
X線造影像を得ることができる。In this state, the contrast medium injection tube 30
The tip of the flexible tube 31 is inserted into the bile duct 100, and a contrast agent is injected from an injection mouth 33 protruding from a base mouth 32 of the contrast agent injection tube 30.
The contrast agent can be sent out into the bile duct 100 to obtain an X-ray contrast image of the bile duct 100.
【0027】胆管100内への造影剤注入が済んだら、
図6に示されるように、外套シース20の手元口金22
と造影剤注入チューブ30の手元口金32との結合を解
除し、造影剤注入チューブ30は動かさずに、外套シー
ス20だけを処置具挿入口15内に押し込む。After the injection of the contrast agent into the bile duct 100,
As shown in FIG. 6, the base 22 of the mantle sheath 20
The coupling between the contrast agent injection tube 30 and the base 32 is released, and only the outer sheath 20 is pushed into the treatment instrument insertion port 15 without moving the contrast agent injection tube 30.
【0028】すると、外套シース20の可撓性チューブ
21の先端部分21aが処置具出口16から突出して、
可撓性チューブ31をガイドにして胆管100内に挿入
される。Then, the distal end portion 21a of the flexible tube 21 of the mantle sheath 20 protrudes from the treatment instrument outlet 16, and
The flexible tube 31 is inserted into the bile duct 100 using the flexible tube 31 as a guide.
【0029】その状態になったら、外套シース20を動
かさないようにして造影剤注入チューブ30を抜去し、
図7に示されるように、子スコープ40の挿入部42を
外套シース20内に差し込むことによって、子スコープ
40の挿入部42の先端が外套シース20をガイドにし
て胆管100内に挿入され、子スコープ40で胆管10
0内を観察することができる。In this state, the contrast medium injection tube 30 is removed without moving the mantle sheath 20, and
As shown in FIG. 7, by inserting the insertion portion 42 of the child scope 40 into the mantle sheath 20, the distal end of the insertion portion 42 of the child scope 40 is inserted into the bile duct 100 by using the mantle sheath 20 as a guide. Bile duct 10 with scope 40
Inside 0 can be observed.
【0030】なお、本発明は上記実施の形態に限定され
るものではなく、例えば筒状部47a部分の軸線方向長
さは先端部本体47の長さの二分の一ないし四分の一程
度の範囲にあればよい。The present invention is not limited to the above embodiment. For example, the axial length of the cylindrical portion 47a is about one-half to one-fourth of the length of the distal end body 47. It only has to be in the range.
【0031】[0031]
【発明の効果】本発明によれば、観察光学系収容穴と照
明光学系収容穴とが形成されている部分が先端部本体の
全長に比べて相当に短いので、途中における穴の曲がり
や変形が極めて小さく正確に加工することができる。ま
た、接着剤を確実に充填するだけの空間がある筒状部内
において先端部本体に対するイメージガイドファイバと
ライトガイドファイバの接着が行われるので、強固で信
頼性の高い固定とシールを行うことができる。According to the present invention, since the portion where the observation optical system housing hole and the illumination optical system housing hole are formed is considerably shorter than the entire length of the distal end body, the hole is bent or deformed in the middle. Can be processed very accurately. In addition, since the image guide fiber and the light guide fiber are bonded to the distal end body in a cylindrical portion having a space for securely filling the adhesive, a strong and reliable fixing and sealing can be performed. .
【図1】本発明の実施の形態の子スコープの挿入部の先
端部分の拡大側面断面図である。FIG. 1 is an enlarged side sectional view of a distal end portion of an insertion portion of a child scope according to an embodiment of the present invention.
【図2】本発明の実施の形態の子スコープの挿入部の先
端部分の拡大正面図である。FIG. 2 is an enlarged front view of a distal end portion of an insertion portion of the child scope according to the embodiment of the present invention.
【図3】本発明の実施の形態の子スコープの挿入部のII
I−III断面図である。FIG. 3 shows an insertion part II of the child scope according to the embodiment of the present invention.
It is I-III sectional drawing.
【図4】本発明の実施の形態の子スコープの側面図であ
る。FIG. 4 is a side view of the child scope according to the embodiment of the present invention.
【図5】本発明の実施の形態の親子式内視鏡装置の使用
手順の第1ステップを示す側面略示図である。FIG. 5 is a schematic side view showing a first step of a procedure for using the parent-child type endoscope apparatus according to the embodiment of the present invention.
【図6】本発明の実施の形態の親子式内視鏡装置の使用
手順の第2ステップを示す側面略示図である。FIG. 6 is a schematic side view showing a second step of a procedure for using the parent-child type endoscope apparatus according to the embodiment of the present invention.
【図7】本発明の実施の形態の親子式内視鏡装置の使用
手順の第3ステップを示す側面略示図である。FIG. 7 is a schematic side view showing a third step of a procedure for using the parent-child type endoscope apparatus according to the embodiment of the present invention.
42 挿入部 47 先端部本体 47a 筒状部 49 対物光学系 50 イメージガイドファイバ 52 ライトガイドファイバ 53 ビーズ 55 観察光学系収容穴 56 照明光学系収容穴 59 接着剤 42 Insertion part 47 Tip main body 47a Cylindrical part 49 Objective optical system 50 Image guide fiber 52 Light guide fiber 53 Bead 55 Observation optical system accommodation hole 56 Illumination optical system accommodation hole 59 Adhesive
Claims (4)
本体に、観察光学系収容穴と照明光学系収容穴とが形成
された前方視型細径内視鏡の先端部において、 上記観察光学系収容穴を上記先端部本体の軸線方向に平
行な円形の断面形状の穴により形成して、上記照明光学
系収容穴を、内側縁が上記観察光学系収容穴の縁部の外
側に沿い外側縁が上記先端部本体の外周の内側に沿う曲
がり長穴によって形成すると共に、上記先端部本体の後
端から全長の四分の一ないし二分の一の範囲を、上記観
察光学系収容穴と上記照明光学系収容穴とが内部に開口
する筒状に形成して、その筒状部内の空間に接着剤を充
填したことを特徴とする前方視型細径内視鏡の先端部。1. A forward-looking small-diameter endoscope in which an observation optical system accommodation hole and an illumination optical system accommodation hole are formed in a columnar tip end main body connected to a tip end of an insertion portion, The observation optical system housing hole is formed by a hole having a circular cross section parallel to the axial direction of the distal end body, and the illumination optical system housing hole has an inner edge outside the edge of the observation optical system housing hole. The outer edge is formed by a curved elongate hole along the inside of the outer periphery of the distal end body, and a quarter to one half of the entire length from the rear end of the distal end body is accommodated in the observation optical system. A distal end portion of a forward-looking small-diameter endoscope, wherein a hole and the illumination optical system housing hole are formed in a cylindrical shape that opens inside, and a space in the cylindrical portion is filled with an adhesive.
ジガイドファイバと照明光学系としてのライトガイドフ
ァイバが通っている請求項1記載の前方視型細径内視鏡
の先端部。2. The forward-looking small-diameter endoscope according to claim 1, wherein an image guide fiber as an observation optical system and a light guide fiber as an illumination optical system pass through the cylindrical portion.
長の略三分の一の範囲に形成されている請求項1又は2
記載の前方視型細径内視鏡の先端部。3. The cylindrical portion is formed in a range of approximately one third of the entire length from a rear end of the tip portion main body.
A distal end portion of the forward-looking small-diameter endoscope described in the above.
光学系と照明光学系だけである請求項1、2又は3記載
の前方視型細径内視鏡の先端部。4. The distal end portion of a forward-looking small-diameter endoscope according to claim 1, wherein only the observation optical system and the illumination optical system are inserted thereinto.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20267697A JP3814055B2 (en) | 1997-07-29 | 1997-07-29 | The tip of the forward-viewing small-diameter endoscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20267697A JP3814055B2 (en) | 1997-07-29 | 1997-07-29 | The tip of the forward-viewing small-diameter endoscope |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1142201A true JPH1142201A (en) | 1999-02-16 |
JP3814055B2 JP3814055B2 (en) | 2006-08-23 |
Family
ID=16461316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20267697A Expired - Fee Related JP3814055B2 (en) | 1997-07-29 | 1997-07-29 | The tip of the forward-viewing small-diameter endoscope |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3814055B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1925252A1 (en) * | 2005-09-14 | 2008-05-28 | Olympus Corporation | Tip structure part of endoscope |
-
1997
- 1997-07-29 JP JP20267697A patent/JP3814055B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1925252A1 (en) * | 2005-09-14 | 2008-05-28 | Olympus Corporation | Tip structure part of endoscope |
EP1925252A4 (en) * | 2005-09-14 | 2009-04-29 | Olympus Corp | Tip structure part of endoscope |
Also Published As
Publication number | Publication date |
---|---|
JP3814055B2 (en) | 2006-08-23 |
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