JP4531437B2 - Method for assembling the tip illumination part of an endoscope - Google Patents

Method for assembling the tip illumination part of an endoscope Download PDF

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JP4531437B2
JP4531437B2 JP2004122447A JP2004122447A JP4531437B2 JP 4531437 B2 JP4531437 B2 JP 4531437B2 JP 2004122447 A JP2004122447 A JP 2004122447A JP 2004122447 A JP2004122447 A JP 2004122447A JP 4531437 B2 JP4531437 B2 JP 4531437B2
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illumination
cover lens
distal end
window hole
light guide
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JP2005304585A (en
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和之 山本
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Hoya Corp
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Description

この発明は内視鏡の先端照明部の組立方法に関する。   The present invention relates to a method for assembling a distal end illumination unit of an endoscope.

内視鏡の挿入部先端においては、一般に、先端部本体の先端面に形成された照明窓に照明用カバーレンズが取り付けられて、その内側にライトガイドファイババンドルの射出端面が配置されている。   At the distal end of the insertion portion of the endoscope, generally, an illumination cover lens is attached to an illumination window formed on the distal end surface of the distal end portion main body, and an emission end surface of the light guide fiber bundle is disposed inside the illumination cover lens.

そのような照明窓に照明用カバーレンズを固定する場合に、照明用カバーレンズを照明窓に単純に接着固定しただけでは、滅菌ガス等による消毒滅菌が繰り返された時に固定強度が次第に不十分になって、照明用カバーレンズが脱落する恐れが生じる。   When fixing an illumination cover lens to such an illumination window, simply fixing the illumination cover lens to the illumination window will cause the fixation strength to gradually become insufficient when disinfection and sterilization with sterilization gas is repeated. As a result, the cover lens for illumination may fall off.

そこで従来は、先端部本体の照明窓孔に照明用カバーレンズを嵌め込んで接着固定する際に、照明用カバーレンズの外縁部分が照明窓孔の内面部分に対して先端部本体の内側から外方に向かって押し付けられた状態に取り付けられるようにしている（例えば、特許文献１）。
特開２００２−８５３２６ Therefore, conventionally, when the illumination cover lens is fitted and fixed in the illumination window hole of the tip body, the outer edge portion of the illumination cover lens is exposed from the inside of the tip body to the inner surface portion of the illumination window hole. It is made to attach in the state pressed toward the direction (for example, patent document 1).
JP 2002-85326 A

上述のような従来の内視鏡の先端照明部の組立方法においては、先端部本体に後方から穿設されたライトガイド配置孔の先端部分に照明窓孔が形成されて、その照明窓孔の内側に照明用カバーレンズが配置され、照明用カバーレンズの外縁部分と照明窓孔の内面部分との接触面に接着剤を塗布してから、ライトガイド配置孔に後方から嵌挿されるライトガイドファイババンドルの先端面を照明用カバーレンズの後面に押し付けて、照明用カバーレンズの外縁部分を照明窓孔の内面部分に押し付けた状態で接着剤を乾燥硬化させるようにしている。   In the conventional method for assembling the distal end illumination portion of the endoscope as described above, an illumination window hole is formed at the distal end portion of the light guide arrangement hole formed in the distal end portion body from the rear, and the illumination window hole A light guide fiber that has an illumination cover lens on the inside, and that is applied to the contact surface between the outer edge portion of the illumination cover lens and the inner surface portion of the illumination window hole, and then inserted into the light guide arrangement hole from the rear. The front end surface of the bundle is pressed against the rear surface of the illumination cover lens, and the adhesive is dried and cured in a state where the outer edge portion of the illumination cover lens is pressed against the inner surface portion of the illumination window hole.

しかし、そのような手順を採ると、照明窓孔と照明用カバーレンズとを固定する接着剤を乾燥硬化させる際には、その部分に射出端部が隣接する状態にライトガイドファイババンドルが先端部本体に取り付けられていることになる。   However, when such a procedure is adopted, when the adhesive for fixing the illumination window hole and the illumination cover lens is dried and cured, the light guide fiber bundle is positioned so that the exit end is adjacent to the portion. It will be attached to the body.

すると、僅か１ｃｍ程度の大きさの先端部本体部分に対して数メートルの長さに及ぶライトガイドファイババンドルバンドルを引きずった状態になることにより、接着剤の乾燥硬化の際の作業性が非常に悪くなってしまう。   Then, the light guide fiber bundle bundle extending several meters long is dragged with respect to the main body portion of the tip portion of only about 1 cm, so that the workability at the time of drying and curing the adhesive is very high. It gets worse.

またさらに、それらを接着剤の乾燥硬化のために加熱炉に入れると、ライトガイドファイババンドルの光学繊維、被覆チューブ、潤滑剤等が熱劣化をして品質が低下してしまう恐れがあり、それを避けるために加熱炉を用いないと十分な固定強度を確保できない恐れがある。   Furthermore, if they are put into a heating furnace for drying and curing the adhesive, the optical fibers, the coated tube, the lubricant, etc. of the light guide fiber bundle may be thermally deteriorated and the quality may be lowered. In order to avoid this, there is a possibility that sufficient fixing strength cannot be secured unless a heating furnace is used.

そこで本発明は、照明窓孔に対する照明用カバーレンズの接着固定を、ライトガイドファイババンドルの品質に全く悪影響を与えることなく容易な作業により行って、十分な固定強度を確保することができる内視鏡の先端照明部の組立方法を提供することを目的とする。   Therefore, the present invention provides an internal view in which sufficient fixing strength can be secured by performing an easy operation without adversely affecting the quality of the light guide fiber bundle by fixing the illumination cover lens to the illumination window hole. An object of the present invention is to provide a method for assembling a tip illumination part of a mirror.

上記の目的を達成するため、本発明の内視鏡の先端照明部の組立方法は、挿入部先端の先端部本体の先端面に形成された照明窓孔に照明用カバーレンズを嵌め込んで接着固定する際に、照明用カバーレンズの外縁部分が照明窓孔の内面部分に対して先端部本体の内側から外方に向かって押し付けられた状態に取り付けられる構造の内視鏡の先端照明部の組立方法において、先端部本体に後方から穿設されたライトガイド配置孔の先端部分に照明窓孔を形成して、照明窓孔の内側に照明用カバーレンズを配置し、照明用カバーレンズの外縁部分と照明窓孔の内面部分との接触面に接着剤を塗布して、ライトガイド配置孔に後方から嵌挿される単独筒状部材の先端を照明用カバーレンズの後面に押し付け、単独筒状部材により照明用カバーレンズの外縁部分を照明窓孔の内面部分に押し付けた状態で接着剤を乾燥硬化させてから、単独筒状部材内に後方からライトガイドファイババンドルの射出端部を差し込み固定するようにしたものである。   In order to achieve the above object, the method for assembling the distal end illumination part of the endoscope according to the present invention is such that the illumination cover lens is fitted into the illumination window hole formed in the distal end surface of the distal end body at the distal end of the insertion part and bonded. When fixing, the outer edge portion of the illumination cover lens is attached to the inner surface portion of the illumination window hole so as to be pressed outward from the inner side of the distal end body. In the assembling method, an illumination window hole is formed at the distal end portion of the light guide arrangement hole drilled in the distal end body from the rear, an illumination cover lens is arranged inside the illumination window hole, and an outer edge of the illumination cover lens Apply an adhesive to the contact surface between the portion and the inner surface portion of the illumination window hole, and press the tip of the single cylindrical member that is inserted into the light guide arrangement hole from the rear against the rear surface of the illumination cover lens. By lighting cover lens The adhesive pressed against the outer edge portion on the inner surface portion of the illumination window opening is dried cured, is obtained by the rear alone tubular inside member to plug to secure the exit end of the light guide fiber bundle.

本発明によれば、単独筒状部材により照明用カバーレンズの外縁部分を照明窓孔の内面部分に押し付けた状態で接着剤を乾燥硬化させてから、単独筒状部材内に後方からライトガイドファイババンドルの射出端部を差し込み固定するようにしたので、照明窓孔に対する照明用カバーレンズの接着固定を、ライトガイドファイババンドルの品質に全く悪影響を与えることなく容易な作業により行って、十分な固定強度を確保することができる。   According to the present invention, after the adhesive is dried and cured in a state where the outer edge portion of the illumination cover lens is pressed against the inner surface portion of the illumination window hole by the single cylindrical member, the light guide fiber is inserted into the single cylindrical member from the rear side. Since the bundle's exit end is inserted and fixed, the lighting cover lens can be bonded and fixed to the lighting window hole by an easy operation without affecting the quality of the light guide fiber bundle. Strength can be secured.

挿入部先端の先端部本体の先端面に形成された照明窓孔に照明用カバーレンズを嵌め込んで接着固定する際に、照明用カバーレンズの外縁部分が照明窓孔の内面部分に対して先端部本体の内側から外方に向かって押し付けられた状態に取り付けられる構造の内視鏡の先端照明部の組立方法において、先端部本体に後方から穿設されたライトガイド配置孔の先端部分に照明窓孔を形成して、照明窓孔の内側に照明用カバーレンズを配置し、照明用カバーレンズの外縁部分と照明窓孔の内面部分との接触面に接着剤を塗布して、ライトガイド配置孔に後方から嵌挿される単独筒状部材の先端を照明用カバーレンズの後面に押し付け、単独筒状部材により照明用カバーレンズの外縁部分を照明窓孔の内面部分に押し付けた状態で接着剤を乾燥硬化させてから、単独筒状部材内に後方からライトガイドファイババンドルの射出端部を差し込み固定する。   When the illumination cover lens is fitted and fixed to the illumination window hole formed on the distal end surface of the distal end body of the insertion portion, the outer edge portion of the illumination cover lens is distal to the inner surface portion of the illumination window hole. In the assembling method of the distal end illumination part of the endoscope having a structure that is attached so as to be pressed outward from the inside of the head part body, the tip part of the light guide arrangement hole drilled from the rear side of the tip part body is illuminated. Form a window hole, arrange the illumination cover lens inside the illumination window hole, apply adhesive to the contact surface between the outer edge part of the illumination cover lens and the inner surface part of the illumination window hole, and arrange the light guide Press the tip of the single cylindrical member inserted into the hole from the back against the rear surface of the illumination cover lens, and apply the adhesive with the single cylindrical member pressing the outer edge of the illumination cover lens against the inner surface of the illumination window hole. Dry-cured After, plug securing the exit end of the light guide fiber bundle from the rear alone tubular member.

図面を参照して本発明の実施例を説明する。
図１は、本発明が適用される内視鏡の挿入部先端の一例を示しており、挿入部１の先端に連結された先端部本体２の先端面に、観察窓３と照明窓４等が並んで配置されている。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of the distal end of an insertion portion of an endoscope to which the present invention is applied. An observation window 3 and an illumination window 4 are provided on the distal end surface of a distal end portion body 2 connected to the distal end of the insertion portion 1. Are arranged side by side.

観察窓３の奥には対物光学系５が配置されていて、対物光学系５の第１レンズ５ａが観察窓３に取り付けられている。また、対物光学系５による被写体の投影位置に固体撮像素子６が配置されて、信号ケーブル７がその後方に引き通されている。   An objective optical system 5 is disposed behind the observation window 3, and a first lens 5 a of the objective optical system 5 is attached to the observation window 3. In addition, a solid-state imaging device 6 is disposed at a projection position of a subject by the objective optical system 5, and a signal cable 7 is routed behind it.

１０は、照明窓４と位置を合わせて、先端部本体２に後方から軸線と平行方向に穿設されたライトガイド配置孔であり、照明用カバーレンズ１２を嵌め込んで接着固定するための照明窓孔１１が、ライトガイド配置孔１０の最先端部分に形成されている。   Reference numeral 10 denotes a light guide arrangement hole which is aligned with the illumination window 4 and is drilled in the distal end portion body 2 from the rear in a direction parallel to the axis, and is used for fitting and fixing the illumination cover lens 12 by bonding. A window hole 11 is formed in the most distal portion of the light guide arrangement hole 10.

この実施例の照明窓孔１１は、先細りのテーパ孔状に形成されていて、照明用カバーレンズ１２もそのような照明窓孔１１にピッタリと嵌まり込む先細りのテーパ状に形成されている。   The illumination window hole 11 of this embodiment is formed in a tapered taper shape, and the illumination cover lens 12 is also formed in a tapered shape that fits into the illumination window hole 11 exactly.

したがって、照明用カバーレンズ１２の外周面が照明窓孔１１の内周面に対して先端部本体２の内側から外方（即ち、後方から前方）に向かって押し付けられた状態に取り付けられている。   Accordingly, the outer peripheral surface of the illumination cover lens 12 is attached to the inner peripheral surface of the illumination window hole 11 so as to be pressed outward from the inside of the tip body 2 (ie, from the rear to the front). .

ただし、本発明は、照明窓孔１１と照明用カバーレンズ１２とが共に先細りのテーパ状に形成されたものに限定されるものではなく、例えば照明窓孔１１と照明用カバーレンズ１２の一方だけが先細りのテーパ状に形成されたものや、照明窓孔１１の外周面の途中に段部が形成されたものなどでもよく、要するに照明用カバーレンズ１２の外縁部分が照明窓孔１１の外縁部分に対して先端部本体２の内側から外方に向かって押し付けられた状態に取り付けられる構造のものであればよい。   However, the present invention is not limited to the case where both the illumination window hole 11 and the illumination cover lens 12 are formed in a tapered shape. For example, only one of the illumination window hole 11 and the illumination cover lens 12 is used. May be formed in a tapered shape, or may be formed in the middle of the outer peripheral surface of the illumination window hole 11. In short, the outer edge portion of the illumination cover lens 12 is the outer edge portion of the illumination window hole 11. As long as it has a structure that can be attached in a state of being pressed outward from the inside of the tip body 2.

１３は、照明用カバーレンズ１２を照明窓孔１１に固定する組み立て工程の際に単独の部品として用いられる円筒形状の単独筒状部材であり、ライトガイド配置孔１０に対して嵌合する状態に後方から差し込まれて、その先端面が照明用カバーレンズ１２の後面に押し付けられた状態で先端部本体２に固定されている。   13 is a cylindrical single cylindrical member used as a single component in the assembly process for fixing the illumination cover lens 12 to the illumination window hole 11, and is fitted in the light guide arrangement hole 10. Inserted from the rear, the front end surface is fixed to the front end portion body 2 in a state where the front end surface is pressed against the rear surface of the illumination cover lens 12.

そして、ライトガイドファイババンドル１４の射出端部がライトガイド配置孔１０に後方から差し込まれてそこに固定されている。１４ａと１４ｂは、ライトガイドファイババンドル１４の口金と被覆チューブである。   Then, the exit end of the light guide fiber bundle 14 is inserted into the light guide arrangement hole 10 from behind and is fixed thereto. Reference numerals 14 a and 14 b denote a cap and a covering tube of the light guide fiber bundle 14.

このような構成の内視鏡の挿入部先端において、照明窓孔１１に照明用カバーレンズ１２を固定する際には、まず図２に示されるように、ライトガイド配置孔１０内に照明用カバーレンズ１２を後方から送り込んで、図３に示されるように、照明窓孔１１の内側位置に照明用カバーレンズ１２を配置する。   When the illumination cover lens 12 is fixed to the illumination window hole 11 at the distal end of the insertion portion of the endoscope having such a configuration, first, as shown in FIG. The lens 12 is fed from behind, and the illumination cover lens 12 is disposed at the inner position of the illumination window hole 11 as shown in FIG.

そして、照明用カバーレンズ１２の外周面と照明窓孔１１の内周面との接触面に接着剤を塗布して、図４に示されるように、ライトガイド配置孔１０に後方から単独筒状部材１３を差し込んで、単独筒状部材１３の先端面を照明用カバーレンズ１２の後面に押し付ける。単独筒状部材１３の後端が先端部本体２の後端から後方に突出していると、そのような作業が容易である。   Then, an adhesive is applied to the contact surface between the outer peripheral surface of the illumination cover lens 12 and the inner peripheral surface of the illumination window hole 11, and as shown in FIG. The member 13 is inserted, and the tip surface of the single cylindrical member 13 is pressed against the rear surface of the illumination cover lens 12. If the rear end of the single cylindrical member 13 protrudes rearward from the rear end of the distal end main body 2, such work is easy.

なお、照明用カバーレンズ１２を照明窓孔１１の内側位置に送り込むには何らかの治具が必要になるので、単独筒状部材１３により照明用カバーレンズ１２をライトガイド配置孔１０の後方から照明窓孔１１の内側位置まで押し込んでから、照明用カバーレンズ１２の外周面と照明窓孔１１の内周面との接触面に接着剤を塗布してもよく、この間の細かい手順はどのようにしても差し支えない。   In order to send the illumination cover lens 12 to the inner position of the illumination window hole 11, some kind of jig is required. Therefore, the illumination cover lens 12 is moved from the rear side of the light guide arrangement hole 10 by the single cylindrical member 13. The adhesive may be applied to the contact surface between the outer peripheral surface of the illumination cover lens 12 and the inner peripheral surface of the illumination window hole 11 after being pushed into the inner position of the hole 11. There is no problem.

そして、照明用カバーレンズ１２の外周面と照明窓孔１１の内周面との接触面に接着剤が塗布された状態で、単独筒状部材１３の先端面を照明用カバーレンズ１２の後面に押し付けた状態を保って、それらを加熱炉に所定時間入れて接着剤を乾燥硬化させる。   Then, with the adhesive applied to the contact surface between the outer peripheral surface of the illumination cover lens 12 and the inner peripheral surface of the illumination window hole 11, the front end surface of the single cylindrical member 13 is the rear surface of the illumination cover lens 12. While maintaining the pressed state, they are put in a heating furnace for a predetermined time to dry and cure the adhesive.

単独筒状部材１３が照明用カバーレンズ１２に後方から押し付けられた状態を保つためには、単独筒状部材１３を先端部本体２に固定する必要があるので、図４に示されるように、固定用ネジ２０を先端部本体２に取り付けてもよく、或いはテープやバンドその他の手段により単独筒状部材１３を先端部本体２に固定してもよい。   In order to keep the single cylindrical member 13 pressed against the illumination cover lens 12 from the rear, it is necessary to fix the single cylindrical member 13 to the tip body 2, as shown in FIG. The fixing screw 20 may be attached to the distal end body 2, or the single cylindrical member 13 may be secured to the distal end body 2 by a tape, a band, or other means.

また、単独筒状部材１３の外周面とライトガイド配置孔１０の内周面との接触面に接着剤を塗布しておき、その接着剤が照明用カバーレンズ１２を固定するための接着剤と共に加熱炉内において乾燥硬化されるようにしてもよい。   Further, an adhesive is applied to the contact surface between the outer peripheral surface of the single cylindrical member 13 and the inner peripheral surface of the light guide arrangement hole 10, and the adhesive together with the adhesive for fixing the illumination cover lens 12. You may make it dry-harden in a heating furnace.

そのようにして、照明用カバーレンズ１２が照明窓孔１１に強固に接着固定されたら、図５に示されるように、ライトガイドファイババンドル１４の射出端部を単独筒状部材１３に後方から差し込んで固定する。その固定手段は接着或いは固定ネジのどちらであっても差し支えない。   Thus, when the illumination cover lens 12 is firmly bonded and fixed to the illumination window hole 11, the exit end of the light guide fiber bundle 14 is inserted into the single cylindrical member 13 from the rear as shown in FIG. Secure with. The fixing means may be either an adhesive or a fixing screw.

このようにして、ライトガイドファイババンドル１４の取り付けは照明用カバーレンズ１２を照明窓孔１１に固定する接着剤の乾燥硬化工程が完了した後になるので、乾燥硬化工程がライトガイドファイババンドル１４の品質に全く悪影響を及ぼさない。   In this way, the light guide fiber bundle 14 is attached after the drying and curing process of the adhesive for fixing the illumination cover lens 12 to the illumination window hole 11 is completed. Will not have any adverse effect.

本発明の内視鏡の先端照明部の組立方法が適用される内視鏡の挿入部先端部分の側面断面図である。It is side surface sectional drawing of the insertion part front-end | tip part of the endoscope to which the assembly method of the front-end | tip illumination part of the endoscope of this invention is applied. 本発明の内視鏡の先端照明部の組立方法の第１工程を示す側面断面図である。It is side surface sectional drawing which shows the 1st process of the assembly method of the front-end | tip illumination part of the endoscope of this invention. 本発明の内視鏡の先端照明部の組立方法の第２工程を示す側面断面図である。It is side surface sectional drawing which shows the 2nd process of the assembly method of the front end illumination part of the endoscope of this invention. 本発明の内視鏡の先端照明部の組立方法の第３工程を示す側面断面図である。It is side surface sectional drawing which shows the 3rd process of the assembly method of the front end illumination part of the endoscope of this invention. 本発明の内視鏡の先端照明部の組立方法の第４工程を示す側面断面図である。It is side surface sectional drawing which shows the 4th process of the assembly method of the front end illumination part of the endoscope of this invention.

符号の説明Explanation of symbols

１ 挿入部
２ 先端部本体
４ 照明窓
１０ ライトガイド配置孔
１１ 照明窓孔
１２ 照明用カバーレンズ
１３ 単独筒状部材
１４ ライトガイドファイババンドル DESCRIPTION OF SYMBOLS 1 Insertion part 2 Tip part main body 4 Illumination window 10 Light guide arrangement hole 11 Illumination window hole 12 Cover lens for illumination 13 Single cylindrical member 14 Light guide fiber bundle

Claims (1)

挿入部先端の先端部本体の先端面に形成された照明窓孔に照明用カバーレンズを嵌め込んで接着固定する際に、上記照明用カバーレンズの外縁部分が上記照明窓孔の内面部分に対して上記先端部本体の内側から外方に向かって押し付けられた状態に取り付けられる構造の内視鏡の先端照明部の組立方法において、
上記先端部本体に後方から穿設されたライトガイド配置孔の先端部分に上記照明窓孔を形成して、上記照明窓孔の内側に上記照明用カバーレンズを配置し、上記照明用カバーレンズの外縁部分と上記照明窓孔の内面部分との接触面に接着剤を塗布して、上記ライトガイド配置孔に後方から嵌挿される単独筒状部材の先端を上記照明用カバーレンズの後面に押し付け、
上記単独筒状部材により上記照明用カバーレンズの外縁部分を上記照明窓孔の内面部分に押し付けた状態で上記接着剤を乾燥硬化させてから、
上記単独筒状部材内に後方からライトガイドファイババンドルの射出端部を差し込み固定するようにしたことを特徴とする内視鏡の先端照明部の組立方法。 When the illumination cover lens is fitted and fixed to the illumination window hole formed on the distal end surface of the distal end main body at the distal end of the insertion portion, the outer edge portion of the illumination cover lens is in contact with the inner surface portion of the illumination window hole. In the assembling method of the distal end illumination part of the endoscope having a structure to be attached in a state of being pressed outward from the inside of the distal end body,
The illumination window hole is formed at the distal end portion of the light guide arrangement hole drilled in the distal end portion main body from the rear, the illumination cover lens is arranged inside the illumination window hole, and the illumination cover lens Apply an adhesive to the contact surface between the outer edge portion and the inner surface portion of the illumination window hole, and press the tip of a single cylindrical member inserted from the rear into the light guide arrangement hole against the rear surface of the illumination cover lens,
After drying and curing the adhesive in a state where the outer edge portion of the illumination cover lens is pressed against the inner surface portion of the illumination window hole by the single cylindrical member,
An assembling method of a distal end illumination part of an endoscope, wherein an emission end part of a light guide fiber bundle is inserted and fixed into the single cylindrical member from behind.
JP2004122447A 2004-04-19 2004-04-19 Method for assembling the tip illumination part of an endoscope Expired - Fee Related JP4531437B2 (en)

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JP4953952B2 (en) * 2007-07-13 2012-06-13 Ｈｏｙａ株式会社 Adjustment jig for assembling endoscope insertion portion and assembling method
JP2012055525A (en) 2010-09-09 2012-03-22 Olympus Corp Imaging device, and endoscope distal end part equipped with the imaging device
WO2018222615A1 (en) * 2017-05-30 2018-12-06 Endochoice, Inc. Illuminator window for a multiple viewing element endoscope

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JP2002085326A (en) * 2000-09-14 2002-03-26 Olympus Optical Co Ltd Endoscope
JP2004230090A (en) * 2003-02-03 2004-08-19 Fuji Photo Optical Co Ltd Distal end of endoscope insertion part

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JPS60186404U (en) * 1984-05-21 1985-12-10 富士写真光機株式会社 Endoscope light guide
JP3737848B2 (en) * 1995-12-25 2006-01-25 ペンタックス株式会社 Endoscope exposed part fixing part

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