JP2014014389A - Structure of flexible tube distal end of endoscope - Google Patents

Structure of flexible tube distal end of endoscope Download PDF

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JP2014014389A
JP2014014389A JP2012151567A JP2012151567A JP2014014389A JP 2014014389 A JP2014014389 A JP 2014014389A JP 2012151567 A JP2012151567 A JP 2012151567A JP 2012151567 A JP2012151567 A JP 2012151567A JP 2014014389 A JP2014014389 A JP 2014014389A
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distal end
nozzle
screw
adhesive
endoscope
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JP6045228B2 (en
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Naoyuki Naito
直幸 内藤
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Hoya Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a structure preventing falling of adhesive at a flexible tube distal end of an endoscope.SOLUTION: In the structure of the flexible tube distal end of an endoscope, a distal end 14 of an endoscope flexible tube includes a nozzle insertion hole 56 in the axial direction of the distal end 14. The distal end 14 also includes a nozzle 38 that is mounted by being inserted into the nozzle insertion hole 56. The distal end 14 is formed with a screw hole 44 penetrating from an outer peripheral surface of the distal end 14 to the nozzle insertion hole 56. The distal end 14 further includes a screw 46 to be inserted into the screw hole 44. A lateral face of the nozzle 38 is formed with a groove c in which the tip end of the screw 46 is engaged. The nozzle 38 is fixed to the distal end 14 by engaging the screw 46 with the groove c. A space between the screw hole 44 and the screw 46 is filled with adhesive 70. The adhesive 70 is tightly closed by an annular member 32 fitted to the outer peripheral face.

Description

本発明は、内視鏡の可撓管先端部の構造に関する。   The present invention relates to a structure of a distal end portion of a flexible tube of an endoscope.

従来、内視鏡の可撓管先端部において、レンズ等を洗浄するために設けられたノズルを側面からビス止めし、そのビス穴を接着剤で充填する構造が知られている（特許文献１）。   2. Description of the Related Art Conventionally, a structure is known in which a nozzle provided for cleaning a lens or the like is screwed from a side surface at a distal end portion of a flexible tube of an endoscope and the screw hole is filled with an adhesive (Patent Document 1). ).

特開平１１−１９７０９５号公報Japanese Patent Laid-Open No. 11-197095

しかし、接着剤は可撓管先端部において露出しているため、薬品にさらされることにより劣化して脱落が発生し、体内を傷つける恐れがある。さらに、脱落箇所には汚物が溜まりやすく不衛生である。   However, since the adhesive is exposed at the distal end portion of the flexible tube, it is likely to deteriorate due to exposure to chemicals, drop off, and injure the body. In addition, filth tends to accumulate at the dropout site, which is unsanitary.

そこで本発明は、これらの問題に鑑みてなされたものであり、内視鏡の可撓管先端部において、固化した接着剤が脱落することを防止する構造を提供することを目的としている。   Therefore, the present invention has been made in view of these problems, and an object of the present invention is to provide a structure that prevents the solidified adhesive from falling off at the distal end of a flexible tube of an endoscope.

本発明に係る内視鏡の可撓管先端部の構造は、内視鏡可撓管の先端部に、先端部の軸方向にノズル差込孔が設けられ、ノズル差込孔に挿入されて取付けられるノズルと、先端部の外周面からノズル差込孔まで貫通するビス穴が形成され、ビス穴に挿通されるビスとを備え、ノズルは、ビスの先端が係合する溝を側面に有し、係合により先端部に固定されるとともに、ビス穴とビスとの間の空間は、接着剤により充填され、接着剤は、外周面に嵌合する環状部材によって密閉されることを特徴とする。   The structure of the flexible tube distal end portion of the endoscope according to the present invention is such that a nozzle insertion hole is provided in the distal end portion of the endoscope flexible tube in the axial direction of the distal end portion and is inserted into the nozzle insertion hole. A nozzle to be attached and a screw hole penetrating from the outer peripheral surface of the tip portion to the nozzle insertion hole, and a screw inserted into the screw hole. The space between the screw hole and the screw is filled with an adhesive, and the adhesive is sealed by an annular member fitted to the outer peripheral surface. To do.

また、接着剤は、軟性材料で生成され、ビス穴から着脱自在であることが好ましい。ノズルを取り外してメンテナンスする際、接着剤が軟性であることにより、ビスを容易に取り外すことが出来るというメリットがある。   The adhesive is preferably made of a soft material and is detachable from the screw hole. When the maintenance is performed by removing the nozzle, there is an advantage that the screw can be easily removed because the adhesive is soft.

本発明によれば、内視鏡の可撓管先端部の接着剤の脱落を防止する構造を提供することが出来る。   ADVANTAGE OF THE INVENTION According to this invention, the structure which prevents drop-off | omission of the adhesive agent of the flexible tube front-end | tip part of an endoscope can be provided.

本発明の実施形態を適用した内視鏡の全体を表す概略図である。1 is a schematic diagram illustrating an entire endoscope to which an embodiment of the present invention is applied. 図１の可撓管先端部の拡大図である。It is an enlarged view of the flexible tube front-end | tip part of FIG. 図２のIII−III線における断面図である。It is sectional drawing in the III-III line of FIG. 図３のIV−IV線における断面図である。It is sectional drawing in the IV-IV line of FIG. 図３のＶ−Ｖ線における断面図である。It is sectional drawing in the VV line | wire of FIG.

以下、本発明の一実施形態について図面を参照して説明する。図１を参照すると、内視鏡１０は、体内に挿入される挿入部１１と、内視鏡１０を操作するために使用者によって把持される操作部１５と、内視鏡１０をプロセッサ（図示せず）に接続するためのコネクタ１６を備える。挿入部１１は、可撓性を有する可撓部１２と、可撓部１２の先端に接続される湾曲部１３と、湾曲部１３の先端に接続された先端部１４とを備える。操作部１５は、ユニバーサルケーブル１７を介してコネクタ１６に接続される。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Referring to FIG. 1, an endoscope 10 includes an insertion unit 11 inserted into a body, an operation unit 15 held by a user to operate the endoscope 10, and the endoscope 10 as a processor (see FIG. 1). A connector 16 is provided for connection to (not shown). The insertion part 11 includes a flexible part 12 having flexibility, a bending part 13 connected to the tip of the flexible part 12, and a tip part 14 connected to the tip of the bending part 13. The operation unit 15 is connected to the connector 16 via the universal cable 17.

先端部１４において撮影された体内の光学像は、先端部１４に設けられた撮像ユニット（図示せず）によって電気信号に変換される。電気信号は、ユニバーサルケーブル１７及びコネクタ１６を介し、プロセッサにおいて画像処理され、画像はオペレータにより観察される。   The in-vivo optical image photographed at the distal end portion 14 is converted into an electrical signal by an imaging unit (not shown) provided at the distal end portion 14. The electrical signal is image processed in the processor via the universal cable 17 and the connector 16, and the image is observed by the operator.

図２を参照し、先端部１４の外観の構造を説明する。先端部１４の最先端の最先端部１８の外周面には環状部材３２が設けられる。図２は環状部材３２が取り外された状態である。先端部１４は、被観察部へ光を照射する配光レンズ３４と、被観察部を観察する対物レンズ３６とを有する。オペレータは、モニタ（図示せず）に映し出された被観察部を観ながら、チャンネル孔４０から出没する処置具（図示せず）を用いて被観察部の処置を行う。対物レンズ３６の汚れは、配設されるノズル３８から射出された水によって洗浄される。チャンネル孔４０付近に設けられたジェット孔４２から射出された水によって被観察部の洗浄を行うことが出来る。   With reference to FIG. 2, the structure of the external appearance of the front-end | tip part 14 is demonstrated. An annular member 32 is provided on the outer peripheral surface of the most distal end portion 18 of the distal end portion 14. FIG. 2 shows a state where the annular member 32 is removed. The distal end portion 14 includes a light distribution lens 34 that irradiates light to the observed portion, and an objective lens 36 that observes the observed portion. The operator treats the observed portion using a treatment tool (not shown) that appears and disappears from the channel hole 40 while viewing the observed portion projected on the monitor (not shown). The dirt on the objective lens 36 is washed with water ejected from the nozzle 38 provided. The observed portion can be cleaned with water ejected from the jet hole 42 provided in the vicinity of the channel hole 40.

以下に詳述するように、ノズル３８は、最先端部１８の外周面に設けられたビス穴４４に挿通されたビス４６によって、所定の位置に固定される。ビス穴４４は、最先端部１８の外周面からノズル差込孔５６（図３参照）まで貫通する。ビス穴４４の後端に隣接して、緊縛糸４８が巻き回される。先端部１４の外周面の外皮４９は、緊縛糸４８と接着剤５０（図３参照）によって固定される。環状部材３２は、緊縛糸４８及びビス穴４４を覆うように、最先端部１８の外周面に嵌合される。   As will be described in detail below, the nozzle 38 is fixed at a predetermined position by a screw 46 inserted through a screw hole 44 provided in the outer peripheral surface of the most distal end portion 18. The screw hole 44 penetrates from the outer peripheral surface of the most distal end portion 18 to the nozzle insertion hole 56 (see FIG. 3). Adjacent to the rear end of the screw hole 44, the binding thread 48 is wound. The outer skin 49 on the outer peripheral surface of the distal end portion 14 is fixed by a binding thread 48 and an adhesive 50 (see FIG. 3). The annular member 32 is fitted to the outer peripheral surface of the most distal end portion 18 so as to cover the binding thread 48 and the screw hole 44.

図３を参照し、ノズル３８周辺の構造を説明する。図３は、環状部材３２が取り付けられた状態である。先端部１４には、空気が通る送風管５２と、水が通る送水管５４とが近接配置される。送風管５２と送水管５４とは先端にそれぞれ射出口を有する。これらの射出口は接続部５８を介してノズル差込孔５６に連通する。ノズル差込孔５６は、最先端部１８の先端から送風管５２と送水管５４の先端まで延びる筒状の空間である。   The structure around the nozzle 38 will be described with reference to FIG. FIG. 3 shows a state in which the annular member 32 is attached. A blower pipe 52 through which air passes and a water supply pipe 54 through which water passes are arranged close to the tip portion 14. The blower pipe 52 and the water supply pipe 54 each have an injection port at the tip. These injection ports communicate with the nozzle insertion hole 56 through the connection portion 58. The nozzle insertion hole 56 is a cylindrical space extending from the distal end of the most distal end portion 18 to the distal ends of the blower pipe 52 and the water supply pipe 54.

ノズル３８は、略半球状のノズル頭部６０と筒状の接続基部６２とを有する。ノズル頭部６０は最先端部１８の前端面から突出しており、ノズル頭部６０の径はノズル差込孔５６の径よりもやや大きい。つまり、最先端部１８を軸方向から見ると、ノズル差込孔５６の開口はノズル頭部６０によって塞がれる。ノズル頭部６０の内部には、ノズル頭部６０の外形に沿うように噴出口６１が設けられる。噴出口６１は、その先端が対物レンズ３６（図２参照）に向くように形成される。ノズル３８の外壁面６３には溝ｃ、例えば０．２ｍｍの深さの溝が形成される。また、接続基部６２は、図４に示すように円筒の一部を軸方向にそって切除して形成され、送風管５２と送水管５４から供給される水や空気がノズル頭部６０に導かれるように構成されている。   The nozzle 38 has a substantially hemispherical nozzle head 60 and a cylindrical connection base 62. The nozzle head 60 protrudes from the front end surface of the most distal portion 18, and the diameter of the nozzle head 60 is slightly larger than the diameter of the nozzle insertion hole 56. That is, when the foremost portion 18 is viewed from the axial direction, the opening of the nozzle insertion hole 56 is blocked by the nozzle head 60. A nozzle 61 is provided inside the nozzle head 60 so as to follow the outer shape of the nozzle head 60. The jet outlet 61 is formed so that the tip thereof faces the objective lens 36 (see FIG. 2). A groove c, for example, a groove having a depth of 0.2 mm, is formed on the outer wall surface 63 of the nozzle 38. Further, as shown in FIG. 4, the connection base 62 is formed by cutting a part of a cylinder along the axial direction, and water and air supplied from the blower pipe 52 and the water supply pipe 54 are guided to the nozzle head 60. It is configured to be.

図３を参照すると、接続基部６２は、ノズル差込孔５６に挿入されて外壁面６３がノズル差込孔５６の内壁面に密着される。ノズル差込孔５６の開口部Ｏには、ノズルカラー６６が設けられる。ノズルカラー６６は、図５に示すように、円板にＤ型の穴を形成して得られる平板である。接続基部６２は、ノズルカラー６６と最先端部１８とに挟持され、ノズル差込孔５６の軸心に垂直な方向に固定される。ノズルカラー６６とは反対側に位置するノズル頭部６０の突出部６８は、最先端部１８の前面に軸方向に係合する。外壁面６３の溝ｃには、ビス４６の先端が係合される。すなわち、突出部６８が最先端部１８に係合され、かつ、ビス４６の先端が溝ｃに係合することにより、接続基部６２は軸方向において固定される。このように、ノズル３８は軸方向および垂直方向において固定される。   Referring to FIG. 3, the connection base 62 is inserted into the nozzle insertion hole 56, and the outer wall surface 63 is brought into close contact with the inner wall surface of the nozzle insertion hole 56. A nozzle collar 66 is provided in the opening O of the nozzle insertion hole 56. As shown in FIG. 5, the nozzle collar 66 is a flat plate obtained by forming a D-shaped hole in a circular plate. The connection base 62 is sandwiched between the nozzle collar 66 and the most distal end portion 18 and is fixed in a direction perpendicular to the axis of the nozzle insertion hole 56. The protrusion 68 of the nozzle head 60 located on the opposite side of the nozzle collar 66 engages the front surface of the most distal end portion 18 in the axial direction. The tip of the screw 46 is engaged with the groove c of the outer wall surface 63. That is, the connection base 62 is fixed in the axial direction by engaging the protrusion 68 with the most distal end portion 18 and engaging the tip of the screw 46 with the groove c. Thus, the nozzle 38 is fixed in the axial direction and the vertical direction.

ビス穴４４の内壁面とビス４６とにより区画形成される空間には、軟性材料で生成された接着剤７０、例えばシリコン系の接着剤が充填される。接着剤７０により、ビス４６の抜けが防止される。また、接着剤７０が軟性であることにより、ノズル３８は適宜着脱可能となる。緊縛糸４８を固定するために設けられた接着剤５０は、硬性の接着剤、例えばエポキシ系の接着剤である。   A space defined by the inner wall surface of the screw hole 44 and the screw 46 is filled with an adhesive 70 made of a soft material, for example, a silicon-based adhesive. The adhesive 70 prevents the screws 46 from coming off. Further, since the adhesive 70 is soft, the nozzle 38 can be appropriately attached and detached. The adhesive 50 provided for fixing the binding thread 48 is a hard adhesive, for example, an epoxy adhesive.

最先端部１８から外皮４９の外周面に渡って、金属製の環状部材３２が嵌合される。環状部材３２は、接着剤７０および接着剤５０によって固定される。環状部材３２に覆われることにより、最先端部１８の表面と先端部１４の表面とは面一となり、挿入部１１（図１参照）はスムーズに体内へ挿入される。さらに、環状部材３２によって接着剤７０および接着剤５０は密閉されて露出しないため、劣化することがなく脱落することが防止されるという効果が得られる。   A metal annular member 32 is fitted over the outermost surface of the outer skin 49 from the most distal portion 18. The annular member 32 is fixed by the adhesive 70 and the adhesive 50. By being covered with the annular member 32, the surface of the most distal end portion 18 and the surface of the distal end portion 14 are flush with each other, and the insertion portion 11 (see FIG. 1) is smoothly inserted into the body. Furthermore, since the adhesive 70 and the adhesive 50 are hermetically sealed by the annular member 32 and are not exposed, there is an effect that it is prevented from dropping without being deteriorated.

１８ 最先端部（先端部）
３２ 環状部材
３８ ノズル
４４ ビス穴
４６ ビス
５６ ノズル差込孔
７０ 接着剤
ｃ 溝 18 Cutting edge (tip)
32 annular member 38 nozzle 44 screw hole 46 screw 56 nozzle insertion hole 70 adhesive c groove

Claims (2)

内視鏡可撓管の先端部に、前記先端部の軸方向にノズル差込孔が設けられ、前記ノズル差込孔に挿入されて取付けられるノズルと、
前記先端部の外周面から前記ノズル差込孔まで貫通するビス穴が形成され、前記ビス穴に挿通されるビスとを備え、
前記ノズルは、前記ビスの先端が係合する溝を側面に有し、前記係合により前記先端部に固定されるとともに、前記ビス穴と前記ビスとの間の空間は、接着剤により充填され、前記接着剤は、前記外周面に嵌合する環状部材によって密閉されることを特徴とする内視鏡の可撓管先端部の構造。 A nozzle insertion hole is provided in the distal end portion of the endoscope flexible tube in the axial direction of the distal end portion, and a nozzle that is inserted and attached to the nozzle insertion hole;
A screw hole penetrating from the outer peripheral surface of the tip portion to the nozzle insertion hole is formed, and includes a screw inserted through the screw hole,
The nozzle has a groove on a side surface to which the tip of the screw is engaged, and is fixed to the tip by the engagement, and a space between the screw hole and the screw is filled with an adhesive. The structure of the distal end portion of the flexible tube of the endoscope, wherein the adhesive is sealed by an annular member fitted to the outer peripheral surface. 前記接着剤は、軟性材料で生成され、前記ビス穴から着脱自在であることを特徴とする請求項１に記載の内視鏡の可撓管先端部の構造。   The structure of the flexible tube distal end portion of the endoscope according to claim 1, wherein the adhesive is made of a soft material and is detachable from the screw hole.
JP2012151567A 2012-07-05 2012-07-05 Structure of flexible tube tip of endoscope Active JP6045228B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021118887A (en) * 2015-09-17 2021-08-12 エンドマスター・プライベート・リミテッドEndomaster Pte Ltd Improved soft robot endoscope system

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JPS62113501U (en) * 1986-01-10 1987-07-20
JPH08173369A (en) * 1994-12-22 1996-07-09 Olympus Optical Co Ltd Endoscope
JPH1156756A (en) * 1997-08-22 1999-03-02 Olympus Optical Co Ltd Endoscope
JPH11197095A (en) * 1998-01-14 1999-07-27 Olympus Optical Co Ltd Endoscope
JPH11244222A (en) * 1998-03-03 1999-09-14 Fuji Photo Optical Co Ltd Mounting structure of fluid jet nozzle for endoscope
JP2004208960A (en) * 2002-12-27 2004-07-29 Olympus Corp Endoscope
JP2005230360A (en) * 2004-02-20 2005-09-02 Olympus Corp Endoscope
JP2006320543A (en) * 2005-05-19 2006-11-30 Olympus Medical Systems Corp Endoscope and production method thereof
EP2022389A1 (en) * 2007-08-10 2009-02-11 Olympus Medical Systems Corporation Endoscope and endoscope apparatus

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Publication number Priority date Publication date Assignee Title
JPS62113501U (en) * 1986-01-10 1987-07-20
JPH08173369A (en) * 1994-12-22 1996-07-09 Olympus Optical Co Ltd Endoscope
JPH1156756A (en) * 1997-08-22 1999-03-02 Olympus Optical Co Ltd Endoscope
JPH11197095A (en) * 1998-01-14 1999-07-27 Olympus Optical Co Ltd Endoscope
JPH11244222A (en) * 1998-03-03 1999-09-14 Fuji Photo Optical Co Ltd Mounting structure of fluid jet nozzle for endoscope
JP2004208960A (en) * 2002-12-27 2004-07-29 Olympus Corp Endoscope
JP2005230360A (en) * 2004-02-20 2005-09-02 Olympus Corp Endoscope
JP2006320543A (en) * 2005-05-19 2006-11-30 Olympus Medical Systems Corp Endoscope and production method thereof
EP2022389A1 (en) * 2007-08-10 2009-02-11 Olympus Medical Systems Corporation Endoscope and endoscope apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021118887A (en) * 2015-09-17 2021-08-12 エンドマスター・プライベート・リミテッドEndomaster Pte Ltd Improved soft robot endoscope system

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