JPH065341B2 - Endoscope - Google Patents
EndoscopeInfo
- Publication number
- JPH065341B2 JPH065341B2 JP63104035A JP10403588A JPH065341B2 JP H065341 B2 JPH065341 B2 JP H065341B2 JP 63104035 A JP63104035 A JP 63104035A JP 10403588 A JP10403588 A JP 10403588A JP H065341 B2 JPH065341 B2 JP H065341B2
- Authority
- JP
- Japan
- Prior art keywords
- tip
- image guide
- objective lens
- adhesive
- endoscope
- 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.)
- Expired - Fee Related
Links
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 description 21
- 230000001070 adhesive effect Effects 0.000 description 18
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Landscapes
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Endoscopes (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は挿入部に挿通されるイメージガイドの先端面
に対物レンズが接着固定して設けられる内視鏡に関す
る。Description: TECHNICAL FIELD The present invention relates to an endoscope in which an objective lens is adhesively fixed to a front end surface of an image guide inserted into an insertion portion.
［従来の技術］ 一般に、内視鏡は操作部と挿入部とからなり、この操作
部にはファイバ束からなるイメージガイドが挿通されて
いる。このイメージガイドの先端は挿入部の先端面に設
けられた観察窓に複数の対物レンズを介して対向し、後
端は上記操作部に設けられた接眼部に対向している。[Prior Art] Generally, an endoscope includes an operation section and an insertion section, and an image guide formed of a fiber bundle is inserted into the operation section. The front end of the image guide faces the observation window provided on the front end surface of the insertion portion through a plurality of objective lenses, and the rear end faces the eyepiece provided on the operation portion.
このような構造の内視鏡においては、たとえば実開昭５
６−１５０５０１号公報に示されるように上記複数の対
物レンズのうちの１つを上記イメージガイドの先端面に
接着固定して設けるようにしたものがある。そして、対
物レンズが接着固定されたイメージガイドの先端部は筒
状の口金に嵌入されて一体的に固化され、この先端部は
挿入部の先端構成部における筒状のレンズ枠に嵌め込ま
れてビスあるいは接着剤によって固定されるようになっ
ている。In an endoscope having such a structure, for example
As disclosed in Japanese Patent Laid-Open No. 6-150501, there is one in which one of the plurality of objective lenses is provided by being adhesively fixed to the front end surface of the image guide. Then, the tip of the image guide to which the objective lens is adhered and fixed is fitted into the cylindrical base and solidified integrally, and the tip is fitted into the cylindrical lens frame in the tip constituting portion of the insertion part and screwed. Alternatively, it is fixed by an adhesive.
［発明が解決しようとする課題］ ところで、イメージガイドの先端面に接着剤によって対
物レンズを接着固定するようにすると、上記接着剤はイ
メージガイドと対物レンズとの間だけでなく、口金の端
面との間にも介在することになる。上記対物レンズと上
記イメージガイドとの外径が上記公報に示されているよ
うにほぼ同じの場合は、接着剤が上記口金の肉厚分だけ
対物レンズの周辺部に拡がる。[Problems to be Solved by the Invention] By the way, when the objective lens is adhered and fixed to the front end surface of the image guide with an adhesive, the adhesive is not only applied between the image guide and the objective lens but also on the end face of the base. It will be intervened between. When the outer diameters of the objective lens and the image guide are almost the same as shown in the publication, the adhesive spreads to the peripheral portion of the objective lens by the thickness of the base.
このように、上記対物レンズを接着する接着剤の量が上
記口金の先端面によって増大すると、内視鏡の組立て工
程中などにおける温度変化によって上記接着剤の体積変
化も大きくなり、対物レンズと接着剤との接合面間に大
きな応力が発生するから、それによって対物レンズがイ
メージガイドから剥離することがあった。As described above, when the amount of the adhesive agent for adhering the objective lens increases due to the tip surface of the mouthpiece, the volume change of the adhesive agent also increases due to the temperature change during the assembly process of the endoscope and the like. Since a large stress is generated between the joint surface with the agent, the objective lens may be separated from the image guide.
この発明は上記事情にもとずきなされたもので、その目
的とするところは、対物レンズをイメージガイドの端面
に接着固定するための接着剤の量を少なくして、上記対
物レンズが剥離しずらいようにした内視鏡を提供するこ
とにある。The present invention has been made in view of the above circumstances. An object of the invention is to reduce the amount of adhesive for adhering and fixing the objective lens to the end face of the image guide so that the objective lens is peeled off. It is to provide a difficult endoscope.
［課題を解決するための手段及び作用］ 上記課題を解決するためにこの発明は、挿入部に挿通さ
れたイメージガイドの先端部に口金を装着するととも
に、上記イメージガイドの先端面に対物レンズを接着固
定してなる内視鏡において、上記口金の先端部の肉厚を
０．２mm以下の薄肉にする。そして、対物レンズと口金
との間に介在する接着剤の量を少なくするようにした。[Means and Actions for Solving the Problems] In order to solve the above problems, according to the present invention, a base is attached to the distal end portion of an image guide inserted through an insertion portion, and an objective lens is attached to the distal end surface of the image guide. In an endoscope that is fixed by adhesion, the thickness of the tip of the mouthpiece is reduced to 0.2 mm or less. Then, the amount of the adhesive agent interposed between the objective lens and the base is reduced.
［実施例］ 以下、この発明の一実施例を図面を参照して説明する。
第３図に示す内視鏡は挿入部１と操作部２とから構成さ
れている。上記挿入部１は可撓管部３の先端に湾曲部４
を介して先端構成部５が設けられてなる。上記操作部２
には上記湾曲部４を遠隔的に湾曲操作する操作ノブ６、
接眼部７および図示しない光源装置に接続されるユニバ
ーサルコード８が設けられている。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
The endoscope shown in FIG. 3 includes an insertion portion 1 and an operation portion 2. The insertion portion 1 has a bending portion 4 at the tip of the flexible tube portion 3.
The tip forming portion 5 is provided via the. The operation unit 2
Includes an operation knob 6 for remotely bending the bending portion 4,
A universal cord 8 connected to the eyepiece 7 and a light source device (not shown) is provided.
第２図に示すように上記先端構成部５の本体９には貫通
孔１１が軸方向に穿設されている。この貫通孔１１の先
端は観察窓を形成するカバーガラス１２で閉塞されてい
る。また、貫通孔１１にはその後端側から筒状のレンズ
枠１３が嵌挿されていて、上記本体９に形成されたねじ
孔１４からねじ込まれたねじ１５によって固定されてい
る。As shown in FIG. 2, a through hole 11 is axially formed in the main body 9 of the tip forming portion 5. The tip of the through hole 11 is closed by a cover glass 12 forming an observation window. Further, a cylindrical lens frame 13 is fitted into the through hole 11 from the rear end side, and is fixed by a screw 15 screwed from a screw hole 14 formed in the main body 9.
上記レンズ枠１３の先端部内には複数の第１の対物レン
ズ16aが保持されているとともに、後端側からはファイ
バ束からなるイメージガイド１６の先端部に一体的に外
嵌された口金１７が嵌挿されている。この口金１７は上
記レンズ枠１３の基端側のボス部１８に形成されたねじ
孔１９からねじ込まれたねじ２１によって固定されてい
る。A plurality of first objective lenses 16a are held in the tip portion of the lens frame 13, and a cap 17 integrally fitted on the tip portion of the image guide 16 made of a fiber bundle from the rear end side. It has been inserted. The base 17 is fixed by a screw 21 screwed into a screw hole 19 formed in a boss portion 18 on the base end side of the lens frame 13.
上記口金１７の先端部の外周面には段部２２が形成さ
れ、この段部２２によって先端部は他の部分よりも外形
寸法が小さな小径部２３に形成されている。この小径部
２３の外形寸法Ｄと内径寸法ｄとは（Ｄ−ｄ）／２＝
０．２mmの関係に設定されている。すなわち、小径部２
３の肉厚は０．２mm以下と非常に薄く設定されている。A step portion 22 is formed on the outer peripheral surface of the tip portion of the base 17, and the step portion 22 forms the tip portion into a small diameter portion 23 having an outer dimension smaller than that of other portions. The outer dimension D and the inner diameter dimension d of the small diameter portion 23 are (D−d) / 2 =
The relationship is set to 0.2 mm. That is, the small diameter portion 2
The thickness of 3 is set to be very thin, 0.2 mm or less.
上記イメージガイド１６の先端面は上記口金１７の先端
面と面一の状態が最もよい。しかしながら、イメージガ
イド１６の先端部に口金１７を取付けてから上記イメー
ジガイド１６の先端面を研磨するため、上記イメージガ
イド１６の先端は口金１７の先端面よりも第２図にｃで
示す寸法だけ突出し、その寸法ｃは研磨後においては
０．０１mmの範囲となている。The tip surface of the image guide 16 is best flush with the tip surface of the base 17. However, since the tip 17 of the image guide 16 is polished after the mouthpiece 17 is attached to the tip of the image guide 16, the tip of the image guide 16 is smaller than the tip surface of the die 17 by a dimension indicated by c in FIG. The protrusion c has a dimension c of 0.01 mm after polishing.
上記イメージガイド１６の先端面には第２の対物レンズ
２４が接着剤２５によって接着固定されている。この接
着剤２５は第２の対物レンズ２４とイメージガイド１６
の端面との間だけでなく、口金１７の端面との間にも介
在することになる。A second objective lens 24 is adhesively fixed to the tip end surface of the image guide 16 with an adhesive 25. The adhesive 25 is used for the second objective lens 24 and the image guide 16
Not only with the end face of the base 17, but also with the end face of the base 17.
このように、イメージガイド１６の先端部に取付けられ
る口金１７の先端部を薄肉な小径部２３に形成したこと
により、この小径部２３の先端面と第２の対物レンズ２
４との間に介在する接着剤２５の体積を減少させること
ができる。したがって、たとえば組立て工程中の温度変
化によって上記接着剤２５の体積が変化しても、その体
積変化は接着剤２５の使用量に応じて減少する。そのた
め、接着剤２５と第２の対物レンズ２４との接合面間に
大きな応力が生じずらいから、上記対物レンズ２４が剥
離するのが防止される。As described above, since the tip of the mouthpiece 17 attached to the tip of the image guide 16 is formed in the thin small-diameter portion 23, the tip surface of the small-diameter portion 23 and the second objective lens 2 are formed.
It is possible to reduce the volume of the adhesive 25 interposed between the adhesive 25 and the adhesive. Therefore, for example, even if the volume of the adhesive 25 changes due to temperature change during the assembly process, the change in volume decreases according to the amount of the adhesive 25 used. Therefore, a large stress is unlikely to be generated between the bonding surface between the adhesive 25 and the second objective lens 24, so that the objective lens 24 is prevented from peeling off.
上記口金１７の先端面がイメージガイド１６の先端面よ
りも寸法ｃだけ後退した位置にあることによってその
分、接着剤２５の体積の増加を招く。しかしながら、上
記寸法ｃが０．１mm以下であるならば、その増加量は少
ないため、第２の対物レンズ２４が剥離することがない
ことが実験によって確められた。Since the tip end surface of the mouthpiece 17 is at a position retracted from the tip end surface of the image guide 16 by the dimension c, the volume of the adhesive 25 increases accordingly. However, if the dimension c is 0.1 mm or less, the amount of increase is small, so it was confirmed by experiments that the second objective lens 24 does not peel off.
なお、上記一実施例では口金１７の先端部の外周面に段
部２２を形成して小径部２３を設けたが、内周面に段部
２２を形成して小径部２３を設けるようにしてもよい。
また、口金１７とイメージガイド１６との先端面を面一
にしてもよいこと無論である。Although the step portion 22 is formed on the outer peripheral surface of the tip portion of the mouthpiece 17 to provide the small diameter portion 23 in the above-described embodiment, the step portion 22 is formed on the inner peripheral surface to provide the small diameter portion 23. Good.
Of course, the tip surfaces of the base 17 and the image guide 16 may be flush with each other.
以上述べたようにこの発明は、イメージガイドの先端に
装着される口金の先端部の肉厚を０．２mm以下の薄肉に
した。したがって、上記イメージガイドの先端面に対物
レンズを固定するための接着剤の体積が上記口金の先端
部が薄肉になった分だけ減少し、上記接着剤の温度変化
による体積変化も小さくなるから、その接着剤によって
固定された上記対物レンズが剥離するのが防止される。As described above, according to the present invention, the thickness of the tip portion of the die attached to the tip of the image guide is reduced to 0.2 mm or less. Therefore, the volume of the adhesive for fixing the objective lens to the tip surface of the image guide is reduced by the amount of the thinned tip of the die, and the volume change due to the temperature change of the adhesive is also reduced. The objective lens fixed by the adhesive is prevented from peeling off.
図面はこの発明の一実施例を示し、第１図はイメージガ
イドを挿入部の先端構成部に取付けた状態の断面図、第
２図はイメージガイドの先端部の拡大断面図、第３図は
内視鏡の全体図である。 １…挿入部、１６…イメージガイド、１７…口金、２２
…段部、２３…小径部、２４…第２の対物レンズ、２５
…接着剤。The drawings show an embodiment of the present invention. FIG. 1 is a sectional view showing a state in which an image guide is attached to a distal end portion of an insertion portion, FIG. 2 is an enlarged sectional view of the distal end portion of the image guide, and FIG. It is a general view of an endoscope. 1 ... Insertion part, 16 ... Image guide, 17 ... Clasp, 22
... step portion, 23 ... small diameter portion, 24 ... second objective lens, 25
…adhesive.
Claims (1)
部に口金を装着するとともに、上記イメージガイドの先
端面に対物レンズを接着固定してなる内視鏡において、
上記口金の先端部の肉厚を０．２mm以下としたことを特
徴とする内視鏡。1. An endoscope in which a base is attached to a distal end portion of an image guide inserted through an insertion portion, and an objective lens is adhesively fixed to the distal end surface of the image guide.
An endoscope characterized in that the tip has a wall thickness of 0.2 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63104035A JPH065341B2 (en) | 1988-04-28 | 1988-04-28 | Endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63104035A JPH065341B2 (en) | 1988-04-28 | 1988-04-28 | Endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01276110A JPH01276110A (en) | 1989-11-06 |
| JPH065341B2 true JPH065341B2 (en) | 1994-01-19 |
Family
ID=14369973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63104035A Expired - Fee Related JPH065341B2 (en) | 1988-04-28 | 1988-04-28 | Endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH065341B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024009079A1 (en) | 2022-07-04 | 2024-01-11 | Hovione Scientia Limited | Dry powder inhaler pharmaceutical composition of coated crystalline dry powder for inhalation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5996002U (en) * | 1982-12-18 | 1984-06-29 | オリンパス光学工業株式会社 | Endoscope |
| JPH0434500Y2 (en) * | 1985-12-06 | 1992-08-17 |
-
1988
- 1988-04-28 JP JP63104035A patent/JPH065341B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024009079A1 (en) | 2022-07-04 | 2024-01-11 | Hovione Scientia Limited | Dry powder inhaler pharmaceutical composition of coated crystalline dry powder for inhalation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01276110A (en) | 1989-11-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |