JPH0610336Y2 - End of endoscope - Google Patents
End of endoscopeInfo
- Publication number
- JPH0610336Y2 JPH0610336Y2 JP2805988U JP2805988U JPH0610336Y2 JP H0610336 Y2 JPH0610336 Y2 JP H0610336Y2 JP 2805988 U JP2805988 U JP 2805988U JP 2805988 U JP2805988 U JP 2805988U JP H0610336 Y2 JPH0610336 Y2 JP H0610336Y2
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- lens frame
- hole
- pin
- image guide
- 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 - Lifetime
Links
Landscapes
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ この考案は、内視鏡の先端部に関し、特に先端部本体の
合成樹脂で形成された部分に、対物レンズ枠を固定する
構造の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a distal end portion of an endoscope, and more particularly, to an improvement in a structure for fixing an objective lens frame to a portion of a distal end body formed of synthetic resin. .
［従来の技術］ 近年、高周波電流を利用したいわゆる高周波処置が内視
鏡で一般に使用されるようになり、それに伴って、内視
鏡の先端部本体の電気絶縁性の確保が不可欠のものとな
った。[Prior Art] In recent years, so-called high-frequency treatment using high-frequency current has come to be generally used in endoscopes, and along with it, it is indispensable to ensure electrical insulation of the distal end body of the endoscope. became.
そこで従来は、先端部本体の少なくとも外表面側を合成
樹脂材で形成すると共に、金属製の対物レンズ枠は、他
の金属部品と接触しないようにして先端部本体の合成樹
脂部に接着固定していた。また、対物レンズの結像位置
にイメージガイドの像入射面を配置し、そのイメージガ
イドを、側方からビス等により押し付けて先端部本体に
固定していた。Therefore, conventionally, at least the outer surface side of the tip body is formed of a synthetic resin material, and the metallic objective lens frame is adhesively fixed to the synthetic resin portion of the tip body so as not to contact other metal parts. Was there. Further, the image entrance surface of the image guide is arranged at the image forming position of the objective lens, and the image guide is fixed to the tip end main body by pressing it from the side with screws or the like.
［考案が解決しようとする課題］ 金属と合成樹脂との接着性は金属どうしを接着する場合
に比べて非常に低い。したがって、金属製の対物レンズ
枠を先端部本体の合成樹脂部に接着していた従来の内視
鏡の先端部は、その接着強度が低く、ちょっとした衝撃
などによって接合部がはがれて水もれを起こし、観察不
能になってしまう事故が発生していた。[Problems to be solved by the invention] The adhesiveness between metal and synthetic resin is much lower than that in the case of adhering metals together. Therefore, the tip portion of the conventional endoscope in which the metallic objective lens frame is adhered to the synthetic resin portion of the tip portion main body has low adhesive strength, and the joint portion is peeled off due to a slight impact or the like to prevent water leakage. There was an accident that caused it to become unobservable.
また、イメージガイドはビス等で側方に押し付けて固定
され、対物レンズ枠はそのイメージガイドと分離して接
着により固定されていたので、対物レンズとイメージガ
イドとの間に芯ずれが発生して、画面のけられや、視野
方向の狂いが生ずる欠点があった。Further, since the image guide is fixed by pressing it sideways with a screw or the like, and the objective lens frame is separated from the image guide and fixed by adhesion, a misalignment occurs between the objective lens and the image guide. However, there are drawbacks that the screen is eclipsed and the direction of the visual field is distorted.
この考案は、そのような従来の欠点を解消し、電気絶縁
性を確保しつつ、対物レンズ枠を先端部本体に強力に固
定することができる内視鏡の先端部を提供し、また、対
物レンズとイメージガイドとの間の芯ずれの発生を無く
した内視鏡の先端部を提供することを目的とする。The present invention solves the above-mentioned conventional drawbacks and provides an endoscope distal end portion capable of strongly fixing the objective lens frame to the distal end portion main body while ensuring electrical insulation. An object of the present invention is to provide a distal end portion of an endoscope in which the occurrence of misalignment between the lens and the image guide is eliminated.
［課題を解決するための手段］ 上記の目的を達成するために、本考案の内視鏡の先端部
は、少なくとも外表面側が合成樹脂材で形成された先端
部本体に貫通孔を穿設して、その貫通孔内に対物光学系
を嵌入固定した内視鏡の先端部において、対物レンズを
組み込んだ金属製の対物レンズ枠を上記貫通孔内に単独
で嵌入すると共に、上記合成樹脂部に、貫通孔内の対物
レンズ枠に向けて側方から側孔を穿設し、その側孔内に
金属製のピンを嵌入して、このピンと対物レンズ枠の外
周面とを接着固定したことを特徴とする。[Means for Solving the Problems] In order to achieve the above-mentioned object, the distal end portion of the endoscope of the present invention has a through hole formed in a distal end body formed of a synthetic resin material at least on the outer surface side. Then, at the tip of the endoscope in which the objective optical system is fitted and fixed in the through hole, a metallic objective lens frame incorporating an objective lens is independently fitted in the through hole, and at the same time, in the synthetic resin portion. , A side hole is bored from the side toward the objective lens frame in the through hole, a metal pin is inserted into the side hole, and the pin and the outer peripheral surface of the objective lens frame are bonded and fixed. Characterize.
また、対物レンズの結像位置にイメージガイドの像入射
面を配置して、そのイメージガイドを固定手段により上
記貫通孔の側壁に押し付け固定した場合には、上記対物
レンズ枠を上記ピンによりイメージガイドと同方向に押
し付けた状態で接着固定してもよく、また、ピンと対物
レンズ枠とを磁性体により形成し、対物レンズ枠が磁力
によりイメージガイドと同方向に引き寄せた状態で接着
固定してもよい。When the image entrance surface of the image guide is arranged at the image forming position of the objective lens and the image guide is pressed against the side wall of the through hole by the fixing means, the objective lens frame is fixed by the pin to the image guide. Alternatively, the pins and the objective lens frame may be adhered and fixed in a state of being pressed in the same direction, or the pins and the objective lens frame may be formed of a magnetic material, and the objective lens frame may be adhered and fixed in the same direction as the image guide by magnetic force. Good.
［作用］ ピンと対物レンズ枠は共に金属製なので、接着により強
力に接合される。したがって、先端部本体に衝撃等が加
わっても、対物レンズ枠は側孔に嵌め込まれたピンによ
って支持されており、先端部本体内での固定位置から動
かない。[Operation] Since the pin and the objective lens frame are both made of metal, they are strongly bonded by adhesion. Therefore, even if an impact or the like is applied to the tip body, the objective lens frame is supported by the pins fitted into the side holes and does not move from the fixed position in the tip body.
また、対物レンズ枠をイメージガイドと同方向に押し付
けることにより、対物レンズとイメージガイドとの光軸
を一致させて組み付けることができる。Further, by pressing the objective lens frame in the same direction as the image guide, the optical axes of the objective lens and the image guide can be aligned and assembled.
［実施例］ 図面を参照して実施例を説明する。[Example] An example will be described with reference to the drawings.
第２図は内視鏡の先端部の外観図、第１図はその側面断
面図である。図中、１は、挿入部の先端に設けられた先
端部本体であり、強度を確保するためにステレンス鋼な
どで形成された金属部１ａと、外部との電気絶縁を確保
するために電気絶縁性の合成樹脂材により先端部本体の
表面側に形成された合成樹脂部１ｂとにより構成されて
いる。FIG. 2 is an external view of the distal end portion of the endoscope, and FIG. 1 is a side sectional view thereof. In the figure, reference numeral 1 denotes a tip end main body provided at the tip of the insertion portion, and a metal portion 1a made of stainless steel or the like for ensuring strength and an electrical insulation for ensuring electrical insulation from the outside. And a synthetic resin portion 1b formed on the front surface side of the tip end main body by using a synthetic resin material having a flexible property.
２は、遠隔操作により任意の方向に屈曲させられる公知
の湾曲部である。３は、電気絶縁性の合成樹脂により形
成され、先端部本体１の合成樹脂部１ｂの外周に螺着さ
れた先端フードである。Reference numeral 2 is a known bending portion that can be bent in an arbitrary direction by remote control. Reference numeral 3 denotes a tip hood formed of an electrically insulating synthetic resin and screwed to the outer periphery of the synthetic resin portion 1b of the tip portion main body 1.
第２図において、４は観察窓、５は照明窓、６は鉗子チ
ャンネル、７，８は、観察窓４に向って空気又は水を噴
出する送気ノズルと送水ノズル、９は、水等の流体を高
速でまっすぐに噴出する水噴射口である。In FIG. 2, 4 is an observation window, 5 is an illumination window, 6 is a forceps channel, 7 and 8 are air supply nozzles and water supply nozzles for ejecting air or water toward the observation window 4, and 9 is water or the like. It is a water injection port that ejects fluid straight at high speed.
第１図に示されるように、先端部本体１には、金属部１
ａと合成樹脂部１ｂとを貫通する貫通孔１０が穿設され
ている。そして、例えば像伝達用光学繊維束からなるイ
メージガイド１１が後方からその貫通孔１０内に嵌入さ
れ、金属部１ａにおいて、例えば小ねじ１２（固定手
段）によって貫通孔１０の側壁に押し付けられて固定さ
れている。As shown in FIG. 1, the tip body 1 includes a metal part 1
A through hole 10 is formed to penetrate a and the synthetic resin portion 1b. Then, an image guide 11 made of, for example, an optical fiber bundle for image transmission is fitted into the through hole 10 from the rear side, and is fixed by being pressed against the side wall of the through hole 10 by the machine screw 12 (fixing means) in the metal portion 1a. Has been done.
観察窓４の内側には対物レンズ１３が配置され、その結
像位置にイメージガイド１１の像入射面１１ａが配置さ
れている。観察窓４と対物レンズ１３とは、例えばステ
ンレス鋼製の対物レンズ枠１４内に接着固定されてい
る。１５は、レンズ間隔をとるためのスペーサである。
対物レンズ枠１４は、イメージガイド１１とは間隔をあ
けて、合成樹脂部１ｂ内において単独で貫通孔１０に嵌
入され、その嵌合面に耐水性の接着剤又はシール剤が塗
布されている。An objective lens 13 is arranged inside the observation window 4, and an image entrance surface 11a of the image guide 11 is arranged at the image forming position thereof. The observation window 4 and the objective lens 13 are bonded and fixed in an objective lens frame 14 made of, for example, stainless steel. Reference numeral 15 is a spacer for providing a lens interval.
The objective lens frame 14 is independently fitted into the through hole 10 in the synthetic resin portion 1b at a distance from the image guide 11, and the fitting surface thereof is coated with a waterproof adhesive or sealant.
また、合成樹脂部１ｂには、貫通孔１０内の対物レンズ
枠１４に向って、側方から側孔１６が穿設されている。
この側孔１６は、上記小ねじ１２と同方向に穿設されて
いる。そして、その側孔１６内に例えばステンレス鋼製
のピン１７が嵌入されて、側孔１６とピン１７と対物レ
ンズ枠１４の外周面とが互いに接着固定されている。１
８は、側孔１６に充填された接着剤である。A side hole 16 is formed in the synthetic resin portion 1b from the side toward the objective lens frame 14 in the through hole 10.
The side hole 16 is formed in the same direction as the machine screw 12. Then, a pin 17 made of, for example, stainless steel is fitted into the side hole 16, and the side hole 16, the pin 17 and the outer peripheral surface of the objective lens frame 14 are adhesively fixed to each other. 1
Reference numeral 8 is an adhesive filled in the side hole 16.
第３図は、先端部本体１にピン１７を接着する際に組立
治具２０を取着した状態を示している。組立治具２０は
リング状に形成されて、先端部本体の合成樹脂部１ｂの
外周に嵌着される。そして、組立治具２０に螺設された
ねじ孔２１に螺合するビス２２によって、ピン１７が、
対物レンズ枠１４に当接する方向に押し付けられる。そ
して、その状態で、側孔１６とピン１７と対物レンズ枠
１４の外周面とが互いに接着固定される。この場合にお
いて、ピン１７はイメージガイド１１を押し付け固定す
る小ねじ１２と同方向に配置されているから、貫通孔１
０内で、対物レンズ枠１４はイメージガイド１１と同じ
方向に押し付けられた状態で固定される。FIG. 3 shows a state in which the assembly jig 20 is attached when the pin 17 is bonded to the tip end main body 1. The assembly jig 20 is formed in a ring shape and is fitted to the outer periphery of the synthetic resin portion 1b of the tip body. Then, with the screw 22 screwed into the screw hole 21 screwed in the assembly jig 20, the pin 17 is
It is pressed in the direction of coming into contact with the objective lens frame 14. Then, in this state, the side hole 16, the pin 17, and the outer peripheral surface of the objective lens frame 14 are adhesively fixed to each other. In this case, since the pin 17 is arranged in the same direction as the machine screw 12 that presses and fixes the image guide 11, the through hole 1
In 0, the objective lens frame 14 is fixed while being pressed in the same direction as the image guide 11.
第４図は、組立治具２０に螺合するビス２２とピン１７
との間にコイルスプリング２３を介挿した例を示してお
り、この状態で側孔１６とピン１７と対物レンズ枠１４
とが互いに接着固定される。このようにすると、ピン１
７が、コイルスプリング２３の弾性力によって対物レン
ズ枠１４に押し付けられるので、対物レンズ枠１４に力
を加えすぎて破損してしまうような事故を未然に防止す
ることができる。FIG. 4 shows a screw 22 and a pin 17 screwed into the assembly jig 20.
2 shows an example in which a coil spring 23 is inserted between the side hole 16, the pin 17 and the objective lens frame 14 in this state.
And are glued and fixed to each other. With this, pin 1
Since 7 is pressed against the objective lens frame 14 by the elastic force of the coil spring 23, it is possible to prevent an accident in which the objective lens frame 14 is damaged due to excessive force.
第５図は、側孔３６を小ねじ１２と１８０度逆側に穿設
した例を示している。この場合には、帯磁した磁性体で
ピン３７を形成すると共に、対物レンズ枠３４を鉄など
のように磁力により引き寄せられる磁性体で形成してお
く。すると、ピン３７を側孔３６内に差し込むことによ
り対物レンズ枠３４がピン３７の側に引き寄せられ、小
ねじ１２で押し付け固定されたイメージガイドと同じ側
に寄せられる。その状態で側孔３６とピン３７と対物レ
ンズ枠３４とが互いに接着固定される。FIG. 5 shows an example in which the side hole 36 is provided on the opposite side of the machine screw 12 by 180 degrees. In this case, the pin 37 is made of a magnetized magnetic material, and the objective lens frame 34 is made of a magnetic material such as iron that is attracted by a magnetic force. Then, by inserting the pin 37 into the side hole 36, the objective lens frame 34 is pulled toward the pin 37 side, and is brought close to the same side as the image guide pressed and fixed by the machine screw 12. In this state, the side hole 36, the pin 37, and the objective lens frame 34 are adhesively fixed to each other.
尚、上記実施例において、イメージガイドは像伝達用光
学繊維束を用いたが、それに代えて固体撮像素子等を用
いたものであってもよい。Although the image guide uses the optical fiber bundle for image transmission in the above embodiments, a solid-state image sensor or the like may be used instead.
［考案の効果］ 本考案の内視鏡の先端部によれば、対物レンズ枠は先端
部本体の合成樹脂部に単独で嵌入されているので電気絶
縁性が確保されると共に、ピンと対物レンズ枠とが共に
金属製なので接着によりお互いが強力に接合され、先端
部本体に衝撃等が加わっても、対物レンズ枠はピンによ
り支持されて、先端部本体内での固定位置から動かな
い。したがって、対物レンズ枠と先端部本体との間は例
えば接着性の低いシール剤などを充填しておくだけでも
充分な耐久性が得られる。[Advantages of the Invention] According to the tip of the endoscope of the present invention, since the objective lens frame is independently fitted into the synthetic resin portion of the tip body, electrical insulation is ensured and the pin and the objective lens frame are secured. Since both and are made of metal, they are strongly bonded to each other by adhesion, and even if a shock is applied to the tip body, the objective lens frame is supported by the pins and does not move from the fixed position in the tip body. Therefore, sufficient durability can be obtained only by filling a sealant having low adhesiveness between the objective lens frame and the tip end body.
また、対物レンズ枠をイメージガイドと同方向に押し付
けることにより、対物レンズとイメージガイドとの光軸
が一致し、画面のけられや、視野方向の狂い等が生じな
い。Further, by pressing the objective lens frame in the same direction as the image guide, the optical axes of the objective lens and the image guide are aligned with each other, so that the screen is not eclipsed and the viewing direction is not deviated.
第１図は本考案の一実施例の側面断面図、第２図はその
外観斜視図、第３図はピンを接合する際に組立治具を取
着した状態の一部を切除して示す正面図、第４図は組立
治具とピンとの間にコイルスプリングを介装した場合の
一部を切除して示す部分正面図、第５図は本考案の他の
実施例の一部を切除して示す正面図である。 １……先端部本体、１ｂ……合成樹脂部、４……観察
窓、１０……貫通孔、１１……イメージガイド、１２…
…小ねじ（固定手段）、１３……対物レンズ、１４……
対物レンズ枠、１６……側孔、１７……ピン、２０……
組立治具、２１……ねじ孔、２２……ビス、２３……コ
イルスプリング、３４……対物レンズ枠、３６……側
孔、３７……ピン。FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is an external perspective view thereof, and FIG. 3 is a partially cutaway view showing a state in which an assembly jig is attached when joining pins. Front view, FIG. 4 is a partial front view showing a part of a coil spring interposed between an assembly jig and a pin, and FIG. 5 is a part of another embodiment of the present invention. FIG. 1 ... Tip body, 1b ... Synthetic resin part, 4 ... Observation window, 10 ... Through hole, 11 ... Image guide, 12 ...
... Screw (fixing means), 13 ... Objective lens, 14 ...
Objective lens frame, 16 ... Side hole, 17 ... Pin, 20 ...
Assembly jig, 21 ... Screw hole, 22 ... Screw, 23 ... Coil spring, 34 ... Objective lens frame, 36 ... Side hole, 37 ... Pin.
Claims (3)
れた先端部本体に貫通孔を穿設して、その貫通孔内に対
物光学系を嵌入固定した内視鏡の先端部において、対物
レンズを組み込んだ金属製の対物レンズ枠を上記貫通孔
内に単独で嵌入すると共に、上記合成樹脂部に、貫通孔
内の対物レンズ枠に向けて側方から側孔を穿設し、その
側孔内に金属製のピンを嵌入して、このピンと対物レン
ズ枠の外周面とを接着固定したことを特徴とする内視鏡
の先端部。Claim: What is claimed is: 1. An objective lens at the tip of an endoscope in which a through hole is formed in a body of a tip portion of which at least an outer surface side is formed of a synthetic resin material, and an objective optical system is fitted and fixed in the through hole. A metal objective lens frame incorporating the above is independently fitted into the through hole, and a side hole is formed in the synthetic resin portion from the side toward the objective lens frame in the through hole. A distal end portion of an endoscope, characterized in that a metal pin is fitted inside and the pin and the outer peripheral surface of the objective lens frame are adhesively fixed.
ドの像入射面が配置され、そのイメージガイドが固定手
段により上記貫通孔の側壁に押し付けられて固定される
と共に、上記対物レンズ枠が上記ピンにより上記イメー
ジガイドと同方向に押し付けられた状態で接着固定され
ている請求項１記載の内視鏡の先端部。2. An image entrance surface of an image guide is arranged at an image forming position of the objective lens, the image guide is pressed against a side wall of the through hole by a fixing means to be fixed, and the objective lens frame is aforesaid. The distal end portion of the endoscope according to claim 1, wherein the distal end portion is adhesively fixed while being pressed in the same direction as the image guide by a pin.
ドの像入射面が配置され、そのイメージガイドが固定手
段により上記貫通孔の側壁に押し付けられて固定される
と共に、上記ピンと対物レンズ枠とが磁性体により形成
され、対物レンズ枠が磁力により上記イメージガイドと
同方向に引き寄せられた状態で接着固定されている請求
項１記載の内視鏡の先端部。3. An image incident surface of an image guide is arranged at an image forming position of the objective lens, and the image guide is pressed and fixed to a side wall of the through hole by a fixing means, and the pin and the objective lens frame are provided. 2. The distal end portion of the endoscope according to claim 1, wherein is made of a magnetic material, and the objective lens frame is adhesively fixed in a state of being attracted in the same direction as the image guide by magnetic force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2805988U JPH0610336Y2 (en) | 1988-03-01 | 1988-03-01 | End of endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2805988U JPH0610336Y2 (en) | 1988-03-01 | 1988-03-01 | End of endoscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01133115U JPH01133115U (en) | 1989-09-11 |
| JPH0610336Y2 true JPH0610336Y2 (en) | 1994-03-16 |
Family
ID=31251098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2805988U Expired - Lifetime JPH0610336Y2 (en) | 1988-03-01 | 1988-03-01 | End of endoscope |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0610336Y2 (en) |
-
1988
- 1988-03-01 JP JP2805988U patent/JPH0610336Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01133115U (en) | 1989-09-11 |
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