JP2018134190A - Component fixing structure and endoscope - Google Patents

Component fixing structure and endoscope Download PDF

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JP2018134190A
JP2018134190A JP2017030036A JP2017030036A JP2018134190A JP 2018134190 A JP2018134190 A JP 2018134190A JP 2017030036 A JP2017030036 A JP 2017030036A JP 2017030036 A JP2017030036 A JP 2017030036A JP 2018134190 A JP2018134190 A JP 2018134190A
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hole
fixing member
nozzle
fixing
groove
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一仁 住吉
Kazuhito Sumiyoshi
一仁 住吉
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Olympus Corp
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Olympus Corp
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Abstract

PROBLEM TO BE SOLVED: To provide component fixing structure in which a fixing member is prevented from falling off from a base member and furthermore the fixing member can surely fix a member to be fixed repeatedly.SOLUTION: The component fixing structure comprises: a tip hard part 21 provided with a nozzle hole 23a provided along the direction of a hard part longitudinal axis a2, and a fixing member hole 26 in communication with the nozzle hole 23a; an endoscope nozzle 5 with an outer circumferential surface groove 5e formed therein; a fixing member 8 inserted into the fixing member hole 26 and arranged in the outer circumferential surface groove 5e, and fixing a relative position between the tip hard part 21 and the endoscope nozzle 5 in the direction of the hard part longitudinal axis a2; and a protruding protrusion portion 8a provided at the fixing member 8, and abutting on the tip hard part 21 to regulate the movement of the fixing member 8 when the force in the direction causing the fixing member 8 to be extracted from the fixing member hole 26 is applied to the protrusion portion 8a.SELECTED DRAWING: Figure 4F

Description

本発明は、硬質部材に配置する部品を繰り返し着脱自在に固定する部品固定構造、及びこの部品固定構造を備えた内視鏡に関する。   The present invention relates to a component fixing structure for repeatedly detachably fixing components arranged on a hard member, and an endoscope provided with this component fixing structure.

内視鏡は、細長な挿入部を有し、その挿入部の先端側に硬質部材で形成された先端硬質部を備えている。先端硬質部には観察部位の観察画像を撮像するための観察光学系、観察部位を照らす照明光学系、観察窓あるいは照明窓の汚れを除去するための流体噴出ノズル等が備えられている。   The endoscope has an elongated insertion portion, and includes a distal end hard portion formed of a hard member on the distal end side of the insertion portion. The distal end hard portion is provided with an observation optical system for capturing an observation image of the observation site, an illumination optical system for illuminating the observation site, a fluid ejection nozzle for removing dirt on the observation window or the illumination window, and the like.

特許文献1には先端部に内蔵物を固定する場合に内蔵物の破損や変形を回避し、確実に固定できるようにした内視鏡が示されている。この内視鏡において、例えば、先端構成部本体(本発明の先端硬性部に対応)のノズル取付け孔に挿入されたノズル(本発明の流体噴出ノズルに対応)は、ネジで先端構成部本体に固定される。この際、ネジの先端に設けた凸部がノズルの部材の側面に設けられた係合用凹部の底面には非接触で側壁部に接触してノズルを固定する。なお、ネジは、先端構成部本体に設けられたネジ孔に螺合されて、該先端構成部本体からの脱落が防止されている。   Japanese Patent Application Laid-Open No. 2004-228561 discloses an endoscope that can be securely fixed while avoiding damage and deformation of the built-in object when the built-in object is fixed to the distal end portion. In this endoscope, for example, a nozzle (corresponding to the fluid ejection nozzle of the present invention) inserted into the nozzle mounting hole of the distal component body (corresponding to the distal rigid portion of the present invention) is attached to the distal component body with a screw. Fixed. At this time, the convex portion provided at the tip of the screw contacts the side wall portion in a non-contact manner with the bottom surface of the engaging concave portion provided on the side surface of the nozzle member to fix the nozzle. Note that the screw is screwed into a screw hole provided in the tip component body, thereby preventing the screw from falling off the tip component body.

特開平10−165355号公報JP-A-10-165355

しかしながら、先端構成部本体の素材によってはこの先端構成部本体に設けられたネジ孔におけるネジ山の強度が不足する場合がある。この結果、ネジを繰り返し使用する場合にはネジ山が摩耗して確実な固定が困難になるおそれがある。また、確実に固定するためにネジを強く締めすぎることによって先端構成部本体に割れが発生するおそれがある。そのため、ノズルを先端構成部本体に固定する技術としてネジ固定に変わる技術が望まれている。   However, depending on the material of the tip component body, the strength of the screw thread in the screw hole provided in the tip component body may be insufficient. As a result, when the screw is repeatedly used, the screw thread may be worn and it may be difficult to reliably fix the screw. Further, if the screw is tightened too much in order to securely fix it, there is a possibility that a crack will occur in the tip component body. Therefore, a technique for replacing the screw fixing is desired as a technique for fixing the nozzle to the tip component body.

本発明は上記事情に鑑みてなされたものであり、固定部材が基盤部材から脱落することを防止しつつ、該固定部材によって基盤部材に配置される被固定部材を繰り返し確実に固定可能な部品固定構造及びこの部品固定構造を備える内視鏡を提供することを目的にしている。   The present invention has been made in view of the above circumstances, and is capable of repeatedly and reliably fixing a fixed member disposed on a base member by the fixing member while preventing the fixing member from falling off the base member. It is an object of the present invention to provide a structure and an endoscope provided with the component fixing structure.

本発明の一態様の部品固定構造は、所定の軸方向に沿って設けられている第1の孔、および、一方が側面に開口を有して他方が該第1の孔に連通する第2の孔、が設けられている基盤部材と、前記第1の孔内に予め定めた状態に配置されて前記第2の孔の延長上に溝が位置するように形成された被固定部材と、前記側面の開口から前記第2の孔に挿入されて前記被固定部材の溝内に予め定めた状態に配置されて前記第2の孔が形成する面、および、前記溝が形成する面に当接する、前記基盤部材と前記被固定部材との前記軸方向の相対位置を固定する固定部材と、前記固定部材に設けられ、該固定部材が予め定めた状態で前記第2の孔内及び前記溝内に挿入された後に当該固定部材を該挿入された方向と略直交する方向に予め定めた量変位または回転されて、前記固定部材に対して該固定部材を該第2の孔から抜去させる方向の力が作用された際に前記基盤部材または前記被固定部材に当接して当該固定部材の前記第2の孔の開口方向への移動を規制する突出部と、を備えている。   The component fixing structure according to one aspect of the present invention includes a first hole provided along a predetermined axial direction, and a second hole in which one side has an opening on the side surface and the other communicates with the first hole. A base member provided with a hole, and a fixed member that is disposed in a predetermined state in the first hole so that a groove is positioned on an extension of the second hole, The second hole is inserted into the second hole through the opening on the side surface and disposed in a predetermined state in the groove of the member to be fixed, and the surface formed by the second hole and the surface formed by the groove A fixing member for fixing the relative position in the axial direction between the base member and the fixed member in contact with each other; and provided in the fixing member; and in the second hole and the groove in a predetermined state. After being inserted into the fixing member, the fixing member is displaced by a predetermined amount in a direction substantially perpendicular to the inserting direction. Is rotated, and when a force is applied to the fixing member in a direction to remove the fixing member from the second hole, the base member or the member to be fixed comes into contact with the first member of the fixing member. And a protrusion that restricts movement of the two holes in the opening direction.

本発明の一態様の内視鏡は、被検体へ挿入される挿入部の先端部に部品固定構造を備えている。   An endoscope according to an aspect of the present invention includes a component fixing structure at a distal end portion of an insertion portion to be inserted into a subject.

本発明によれば、固定部材が基盤部材から脱落することを防止しつつ、該固定部材によって基盤部材に配置される被固定部材を繰り返し確実に固定可能な部品固定構造及びこの部品固定構造を備える内視鏡を実現できる。   According to the present invention, there is provided a component fixing structure capable of repeatedly and reliably fixing a fixed member disposed on a base member by the fixing member while preventing the fixing member from falling off the base member, and the component fixing structure. An endoscope can be realized.

内視鏡の挿入部の先端面を正面から見た図Front view of the distal end of the insertion part of the endoscope 図1の矢印Y2−Y2線段面図であって、挿入部の先端側の構造を説明する図FIG. 2 is a cross-sectional view taken along line Y2-Y2 in FIG. 1 and illustrates a structure on the distal end side of the insertion portion. 先端硬質部のノズル用孔とノズル用孔内に配置される凹部を有する内視鏡ノズルと固定部材用孔と固定部材用孔に配置される固定部材とを説明する図The figure explaining the nozzle hole of the nozzle hole of a front-end | tip hard part, the endoscope nozzle which has a recessed part arrange | positioned in a nozzle hole, the hole for fixing members, and the fixing member arrange | positioned at the hole for fixing members. ノズル用孔内に配置された内視鏡ノズルと、固定部材用孔および固定部材用孔に挿通される固定部材との関係を説明する図The figure explaining the relationship between the endoscope nozzle arrange | positioned in the hole for nozzles, the fixing member penetrated by the hole for fixing members, and the hole for fixing members 図4Aの矢印Y4B方向から固定部材と先端硬質部および先端硬質部に形成された固定部材用孔を見た図The figure which looked at the hole for fixing members formed in the fixing member, the tip hard part, and the tip hard part from the arrow Y4B direction of FIG. 4A 固定部材の突出部が固定部材用孔を通過して該突出部が外周溝内に配置されて棒状部が固定部材用孔内に配置されている状態を示す図The figure which shows the state which the protrusion part of a fixing member passes the hole for fixing members, this protrusion part is arrange | positioned in an outer periphery groove | channel, and the rod-shaped part is arrange | positioned in the hole for fixing members. 図4Cの矢印Y4D方向から固定部材用孔内に配置された棒状部を含む固定部材および先端硬質部を見た図The figure which looked at the fixing member containing the rod-shaped part arrange | positioned in the hole for fixing members from the arrow Y4D direction of FIG. 4C, and a front-end | tip hard part. 固定部材用孔内の棒状部を90度回転させて外周溝内に配置された突出部の第1当接面を外周溝の壁面にそれぞれ対向配置させた状態を示す図The figure which shows the state which rotated the rod-shaped part in the hole for fixing members 90 degree | times, and arrange | positioned the 1st contact surface of the protrusion part arrange | positioned in an outer peripheral groove facing the wall surface of an outer peripheral groove, respectively. 図4Eの矢印Y4F−Y4F線断面図であって、対向配置された第1当接面と外周溝の壁面と、対向配置された第2当接面とノズル用孔の内周面と、対向配置された第3当接面と固定部材用孔の内視鏡と、を示す図4E is a cross-sectional view taken along the line Y4F-Y4F in FIG. 4E, and is opposed to the first contact surface and the wall surface of the outer circumferential groove that are disposed to face each other, the second contact surface that is disposed to face each other, and the inner circumferential surface of the nozzle hole. The figure which shows the arrange | positioned 3rd contact surface and the endoscope of the hole for fixing members. 内視鏡ノズルに設けられる凹部の他の構成例を説明する図The figure explaining the other structural example of the recessed part provided in an endoscope nozzle 内視鏡ノズルに設けられる凹部の別の構成例を説明する図The figure explaining another structural example of the recessed part provided in an endoscope nozzle ノズル用孔内に配置された内視鏡ノズルの凹部と凹部内に配置された固定部材の突出部と固定部材用孔内に配置された固定部材の棒状部とを示す図The figure which shows the recessed part of the endoscope nozzle arrange | positioned in the hole for nozzles, the protrusion part of the fixing member arrange | positioned in the recessed part, and the rod-shaped part of the fixing member arrange | positioned in the hole for fixing members. 図5Cの矢印Y5D方向から固定部材用孔内に配置された棒状部を含む固定部材と内視鏡ノズルに設けられた凹溝との関係を説明する図The figure explaining the relationship between the fixing member containing the rod-shaped part arrange | positioned in the hole for fixing members from the arrow Y5D direction of FIG. 5C, and the ditch | groove provided in the endoscope nozzle. 図5Cの矢印Y5E方向から固定部材用孔内に配置された棒状部を含む固定部材と内視鏡ノズルに設けられた円形穴との関係を説明する図The figure explaining the relationship between the fixing member containing the rod-shaped part arrange | positioned in the hole for fixing members from the arrow Y5E direction of FIG. 5C, and the circular hole provided in the endoscope nozzle. 固定部材の他の構成例を説明する図The figure explaining the other structural example of a fixing member 図6Aの固定部材の正面図Front view of the fixing member of FIG. 6A 固定部材用孔内に配置された棒状部を含む固定部材と内視鏡ノズルに設けられた外周溝との関係を説明する図The figure explaining the relationship between the fixing member containing the rod-shaped part arrange | positioned in the hole for fixing members, and the outer periphery groove | channel provided in the endoscope nozzle. 外周溝の他の構成例を説明する図The figure explaining the other structural example of an outer periphery groove | channel 先端硬質部のノズル用孔に通じる第2の孔の他の構成例を説明する図The figure explaining the other structural example of the 2nd hole connected to the nozzle hole of a front-end | tip hard part. T字形状の固定部材用孔と固定部材との関係を説明する図The figure explaining the relationship between the hole for T-shaped fixing members, and a fixing member 図7Bの矢印Y7C−Y7C線断面図Sectional view taken along line Y7C-Y7C in FIG. 7B 先端カバーを備えた挿入部の先端側の構造を説明する図The figure explaining the structure of the front end side of the insertion part provided with the front-end | tip cover 固定部材と、カバー側固定部材用孔、固定部材配置用孔及び外周溝との関係を説明する図The figure explaining the relationship between a fixing member, the hole for cover side fixing members, the hole for fixing member arrangement | positioning, and an outer periphery groove | channel. 図8Bの矢印Y8C方向から固定部材および先端カバー備える先端硬質部を見た図The figure which looked at the front-end | tip hard part provided with a fixing member and a front-end | tip cover from the arrow Y8C direction of FIG. 8B. 図8Bの矢印Y8D方向から固定部材を見た図The figure which looked at the fixing member from the arrow Y8D direction of FIG. 8B 突出部がカバー側固定部材用孔を通過した状態を示す図The figure which shows the state which the protrusion part passed the hole for cover side fixing members 固定部材回転後の状態を示す図The figure which shows the state after fixing member rotation

以下、図面を参照して本発明の実施の形態を説明する。
なお、以下の説明に用いる各図において、各構成要素を図面上で認識可能な程度の大きさとするため、構成要素毎に縮尺を異ならせてあるものもある。即ち、本発明は、これらの図に記載された構成要素の数量、構成要素の形状、構成要素の大きさの比率、及び各構成要素の相対的な位置関係のみに限定されるものではない。
Embodiments of the present invention will be described below with reference to the drawings.
In each drawing used in the following description, the scale of each component may be different in order to make each component large enough to be recognized on the drawing. That is, the present invention is not limited only to the number of components, the shape of the components, the ratio of the sizes of the components, and the relative positional relationship between the components described in these drawings.

図1に示す内視鏡1の挿入部先端部(以下、先端部と略記する)2の先端面2fには観察窓31と、例えば2つの照明窓41と、内視鏡ノズル5と、が配設されている。符号2mは、チャンネル開口である。チャンネル開口2mは、処置具である例えば把持鉗子等が導出される導出口である。チャンネル開口2mは、吸引口としての機能を兼用している。   An observation window 31, for example, two illumination windows 41, and an endoscope nozzle 5 are provided on a distal end surface 2 f of an insertion portion distal end (hereinafter abbreviated as a distal end) 2 of the endoscope 1 shown in FIG. 1. It is arranged. Reference numeral 2m is a channel opening. The channel opening 2m is a lead-out port from which a treatment tool such as a grasping forceps is led out. The channel opening 2m also functions as a suction port.

観察窓31は、撮像光学系を構成する対物光学系3の最先端に設けられている。照明窓41は、照明光学系4を構成する。内視鏡ノズル5は、観察窓31に向けて液体または気体を噴出する流体噴出ノズルである。   The observation window 31 is provided at the forefront of the objective optical system 3 constituting the imaging optical system. The illumination window 41 constitutes the illumination optical system 4. The endoscope nozzle 5 is a fluid ejection nozzle that ejects liquid or gas toward the observation window 31.

図2に示す内視鏡1の挿入部6は、先端部2と、湾曲部(不図示)と、可撓管部(不図示)と、を備えている。先端部2は、挿入部6の最先端を構成している。湾曲部は、上下左右の四方向、あるいは、上下の二方向等に湾曲する構成になっている。可撓管部は、長尺で可撓性を有し、湾曲部の基端側に設けられている。   The insertion portion 6 of the endoscope 1 shown in FIG. 2 includes a distal end portion 2, a bending portion (not shown), and a flexible tube portion (not shown). The distal end portion 2 constitutes the forefront of the insertion portion 6. The bending portion is configured to bend in four directions, up and down, left and right, or two directions up and down. The flexible tube portion is long and flexible, and is provided on the proximal end side of the bending portion.

符号7aは、先端湾曲駒であって、湾曲部の最先端を構成する。符号7bは湾曲カバーである。湾曲カバー7bは、先端湾曲駒7aおよび該湾曲駒7aに連接する複数の湾曲駒で構成された湾曲駒組(不図示)を被覆する。
先端部2は、硬質なブロック部材である先端硬質部21と、先端湾曲駒7aと、湾曲カバー7bと、を備えている。先端湾曲駒7aの先端側部は、先端硬質部21の基端側部に固定されている。
Reference numeral 7a is a tip bending piece, which constitutes the forefront of the bending portion. Reference numeral 7b is a curved cover. The bending cover 7b covers a bending piece set (not shown) composed of a distal bending piece 7a and a plurality of bending pieces connected to the bending piece 7a.
The tip portion 2 includes a tip hard portion 21 that is a hard block member, a tip bending piece 7a, and a bending cover 7b. The distal end side portion of the distal bending piece 7 a is fixed to the proximal end side portion of the distal end hard portion 21.

本実施形態の先端硬質部21は、基盤部材であって例えば樹脂によって構成されている。なお、先端硬質部21は、樹脂製に限らず金属製であってもよい。先端硬質部21は、一部が湾曲カバー7bで被覆されている。先端硬質部21には所定の軸である硬質部長手軸(図1の符号a2参照)に沿って複数の貫通孔が形成されている。複数の貫通孔は、例えば符号22に示す撮像光学系用孔、符号23に示す流体供給用孔、照明光学系用孔(不図示)、チャンネル用孔(不図示)等である。   The distal end hard portion 21 of the present embodiment is a base member and is made of, for example, resin. Note that the hard tip portion 21 is not limited to resin but may be made of metal. The distal end hard portion 21 is partially covered with the curved cover 7b. A plurality of through-holes are formed in the distal end hard portion 21 along a hard portion longitudinal axis (see symbol a2 in FIG. 1) which is a predetermined axis. The plurality of through holes are, for example, an imaging optical system hole indicated by reference numeral 22, a fluid supply hole indicated by reference numeral 23, an illumination optical system hole (not shown), a channel hole (not shown), and the like.

観察光学系用孔22は、例えば細径孔22aと太径孔22bとを備えている。細径孔22aにはレンズ保持枠32が固設され、太径孔22bには撮像枠33が固設されている。   The observation optical system hole 22 includes, for example, a small diameter hole 22a and a large diameter hole 22b. A lens holding frame 32 is fixed to the small diameter hole 22a, and an imaging frame 33 is fixed to the large diameter hole 22b.

レンズ保持枠32には対物光学系3を構成する複数の光学レンズ34が固設されている。撮像枠33にはCCD、CMOSなどの撮像素子35を備えた撮像ユニット36が固設されている。観察窓31は、レンズ保持枠32の最も先端側に設けられている。レンズ保持枠32の基端側には撮像枠33の先端側が位置決め固定されている。   A plurality of optical lenses 34 constituting the objective optical system 3 are fixed to the lens holding frame 32. An imaging unit 36 having an imaging element 35 such as a CCD or CMOS is fixed to the imaging frame 33. The observation window 31 is provided on the most distal end side of the lens holding frame 32. The distal end side of the imaging frame 33 is positioned and fixed to the proximal end side of the lens holding frame 32.

流体供給用孔23は、ノズル用孔23aと接続パイプ孔23bとチューブ孔23cとを備えている。ノズル用孔23aは、第1の孔であって、被固定部材である内視鏡ノズル5が配設される。   The fluid supply hole 23 includes a nozzle hole 23a, a connection pipe hole 23b, and a tube hole 23c. The nozzle hole 23a is a first hole and is provided with the endoscope nozzle 5 which is a fixed member.

接続パイプ孔23bには連結管である接続パイプ24が配設される。接続パイプ24の先端側は、接続パイプ孔23b内に例えば接着によって一体固定される。接続パイプ24の基端側には送気送水チューブ25の先端側が固設される。
本実施形態において、送気送水チューブ25の先端側は、チューブ孔23c内に配置されるようになっている。
A connection pipe 24, which is a connecting pipe, is disposed in the connection pipe hole 23b. The distal end side of the connection pipe 24 is integrally fixed in the connection pipe hole 23b by, for example, adhesion. The distal end side of the air / water feeding tube 25 is fixed to the proximal end side of the connection pipe 24.
In the present embodiment, the distal end side of the air / water feeding tube 25 is arranged in the tube hole 23c.

なお、ノズル用孔23aに配設された内視鏡ノズル5は、固定部材8によって、ノズル用孔23aから脱落することなく、かつ、予め定めた位置に固定保持されるようになっている。符号26は、固定部材用孔であってストレート形状の第2の孔である。   The endoscope nozzle 5 provided in the nozzle hole 23a is fixed and held at a predetermined position by the fixing member 8 without dropping from the nozzle hole 23a. Reference numeral 26 denotes a fixing member hole, which is a straight second hole.

図3に示すように固定部材用孔26の一方は、先端硬質部21の側面に開口し、他方はノズル用孔23aの内周面に開口している。固定部材用孔26の内面は規制部であって平滑面である。   As shown in FIG. 3, one of the fixing member holes 26 opens on the side surface of the distal end hard portion 21, and the other opens on the inner peripheral surface of the nozzle hole 23a. The inner surface of the fixing member hole 26 is a regulating portion and is a smooth surface.

ここで、内視鏡ノズル5を先端硬質部21に固定部材8によって繰り返し固定保持可能にする部品固定構造を説明する。
まず、内視鏡ノズル5の構成を説明する。
図2、図3、図4Aに示す内視鏡ノズル5は、略円筒形状であって、ノズル部5aとノズル本体部5bとを有している。ノズル部5aは、先端硬質部21の先端面21fより先端側に突出する。ノズル本体部5bは、図3の矢印Y3aに示すように挿入されてノズル用孔23a内に収容されるようになっている。
Here, a component fixing structure that enables the endoscope nozzle 5 to be repeatedly fixed and held by the fixing member 8 to the distal end hard portion 21 will be described.
First, the configuration of the endoscope nozzle 5 will be described.
The endoscope nozzle 5 shown in FIGS. 2, 3, and 4A has a substantially cylindrical shape and includes a nozzle portion 5a and a nozzle main body portion 5b. The nozzle portion 5 a protrudes from the distal end surface 21 f of the distal end hard portion 21 toward the distal end side. The nozzle body 5b is inserted as shown by an arrow Y3a in FIG. 3 and is accommodated in the nozzle hole 23a.

具体的に、ノズル本体部5bは、ノズル本体部5bの基端面がノズル用孔23aと接続パイプ孔23bとで形成された段差面23dに当接することによって、ノズル用孔23a内に収容配置される。この収容配置状態において、ノズル部5aが先端硬質部21の先端面21fより予め定めた量突出する。   Specifically, the nozzle body 5b is accommodated and disposed in the nozzle hole 23a by the base end surface of the nozzle body 5b coming into contact with the step surface 23d formed by the nozzle hole 23a and the connection pipe hole 23b. The In this accommodated arrangement state, the nozzle portion 5a protrudes from the distal end surface 21f of the distal end hard portion 21 by a predetermined amount.

内視鏡ノズル5には第1流路5cと第2流路5dとが設けられている。第1流路5cは、ノズル長手軸a5に沿って設けられた有底の孔であって、基端面に開口を有している。第2流路5dは、第1流路5c内と外部とを通じる孔であって、外部側であるノズル部5aの側面に噴出開口5mを有している。噴出開口5mは、対物レンズ31を向いて設けられている。   The endoscope nozzle 5 is provided with a first flow path 5c and a second flow path 5d. The first flow path 5c is a bottomed hole provided along the nozzle longitudinal axis a5, and has an opening on the base end face. The second flow path 5d is a hole that passes through the inside of the first flow path 5c and the outside, and has an ejection opening 5m on the side surface of the nozzle portion 5a that is the outside. The ejection opening 5 m is provided facing the objective lens 31.

ノズル本体部5bは、外周面の予め定めた位置には凹部となる外周溝5eを有している。外周溝5eの幅はwに設定され、深さはdに設定されている。なお、図4Aの符号5e1は第1壁面、符号5e2は第2壁面である。   The nozzle body 5b has an outer peripheral groove 5e serving as a recess at a predetermined position on the outer peripheral surface. The width of the outer peripheral groove 5e is set to w, and the depth is set to d. In FIG. 4A, reference numeral 5e1 is a first wall surface, and reference numeral 5e2 is a second wall surface.

次に、固定部材8の構成を説明する。
図3、図4A、図4Bに示すように固定部材8は、突出部8aと棒状部8bとを有している。棒状部8bの断面形状は、例えば直径Dの円形である。これに対して、突出部8aの断面形状は、棒状部8bの中心c8に対して外形が円形ではない不定な形状であって、例えば、長手部8cと短手部8dとを有する、扁平形状である。
Next, the configuration of the fixing member 8 will be described.
As shown in FIGS. 3, 4A, and 4B, the fixing member 8 has a protruding portion 8a and a rod-shaped portion 8b. The cross-sectional shape of the rod-shaped portion 8b is, for example, a circle having a diameter D. On the other hand, the cross-sectional shape of the protruding portion 8a is an indefinite shape whose outer shape is not circular with respect to the center c8 of the rod-like portion 8b, and has, for example, a flat shape having a long portion 8c and a short portion 8d. It is.

本実施形態において、短手部8dの厚みTは、棒状部8bの直径Dと同じである。長手部8cは、棒状部8bの中心c8を挟んで該棒状部8bの外周面から両外方側に突出して形作られている。両端は、中心c8より等距離離間した位置に設けられている。   In the present embodiment, the thickness T of the short portion 8d is the same as the diameter D of the rod-like portion 8b. The longitudinal portion 8c is formed so as to protrude outward from the outer peripheral surface of the rod-shaped portion 8b with the center c8 of the rod-shaped portion 8b interposed therebetween. Both ends are provided at positions equidistant from the center c8.

そして、長手部8cの端部は、例えば直径Dの半円形状であって半円形状の端部端面は平滑面である。本実施形態において、符号8eは第1当接面であって長手部8cの両端部の頂点である。符号8fは第2当接面であって、突出部8aと棒状部8bとの段差面である。棒状部8bの外周面は、第3当接面8gとしての機能を有している。   The end of the longitudinal portion 8c is, for example, a semicircular shape with a diameter D, and the end surface of the semicircular end is a smooth surface. In the present embodiment, reference numeral 8e is a first contact surface, which is the apex of both end portions of the longitudinal portion 8c. Reference numeral 8f denotes a second contact surface, which is a step surface between the protruding portion 8a and the rod-shaped portion 8b. The outer peripheral surface of the rod-shaped portion 8b has a function as the third contact surface 8g.

図4Bに示すように長手部8cの幅はWであって、図4Aに示すように突出部8aの長さL1に設定され、棒状部8bの長さはL2に設定されている。   As shown in FIG. 4B, the width of the longitudinal portion 8c is W, and as shown in FIG. 4A, the length L1 of the protruding portion 8a is set, and the length of the rod-like portion 8b is set to L2.

長手部8cの幅Wは、外周溝5eの幅wに対して予め定めたクリアランス分だけ小さく設定されている。突出部8aの長さL1は、外周溝5eの深さdに対して予め定めたクリアランス分だけ小さく設定されている。   The width W of the longitudinal portion 8c is set smaller than the width w of the outer circumferential groove 5e by a predetermined clearance. The length L1 of the protrusion 8a is set to be smaller than the depth d of the outer peripheral groove 5e by a predetermined clearance.

そして、突出部8aは、固定部材用孔26内を通過した後、図4C、図4Dに示すように外周溝5e内に配置されるようになっている。   Then, after passing through the fixing member hole 26, the protruding portion 8a is arranged in the outer peripheral groove 5e as shown in FIGS. 4C and 4D.

これに対して、棒状部8bは、図4Cに示すように突出部8aが外周溝5e内に配置された状態において、開口26mから外方に突出すること無く固定部材用孔26内に配置されるようになっている。   On the other hand, the rod-like portion 8b is arranged in the fixing member hole 26 without protruding outward from the opening 26m in a state where the protruding portion 8a is arranged in the outer peripheral groove 5e as shown in FIG. 4C. It has become so.

この配置状態において、棒状部8bは、図4Dの矢印Y4Dに示すように固定部材用孔26内において固定部材中心軸c8周りに回転自在である。そして、突出部8aは、棒状部8bの回転に伴って外周溝5e内において回転する。   In this arrangement state, the rod-like portion 8b is rotatable around the fixing member central axis c8 in the fixing member hole 26 as indicated by an arrow Y4D in FIG. 4D. And the protrusion part 8a rotates in the outer periphery groove | channel 5e with rotation of the rod-shaped part 8b.

つまり、図4Dに示すように配置されていた突出部8aは、回転されることによって図4Eの破線、図4Fに示すように長手部8cの第1当接面8eが外周溝5eの第1壁面5e1と第2壁面5e2との間に配置されるようになっている。   That is, the protruding portion 8a arranged as shown in FIG. 4D is rotated by the broken line in FIG. 4E, and the first contact surface 8e of the longitudinal portion 8c is the first of the outer peripheral groove 5e as shown in FIG. 4F. It is arranged between the wall surface 5e1 and the second wall surface 5e2.

最後に、固定部材用孔26の構成を説明する。
図2−図4Bに示すように先端硬質部21には固定部材用孔26が設けられている。固定部材用孔26は、外部と流体供給用孔23に備えられたノズル用孔23aの内部空間とを通じるストレート孔であり、固定部材用孔26の軸がノズル用孔23aの軸に対して直交している。
Finally, the configuration of the fixing member hole 26 will be described.
As shown in FIGS. 2 to 4B, the distal end hard portion 21 is provided with a fixing member hole 26. The fixing member hole 26 is a straight hole that passes through the outside and the internal space of the nozzle hole 23a provided in the fluid supply hole 23, and the axis of the fixing member hole 26 is relative to the axis of the nozzle hole 23a. Orthogonal.

固定部材8は、図3の矢印Y3bに示すように突出部8a側から開口26mを介して固定部材用孔26内に固定部材中心軸c8延長方向に向けて挿入されていくようになっている。   As shown by an arrow Y3b in FIG. 3, the fixing member 8 is inserted into the fixing member hole 26 from the protruding portion 8a side through the opening 26m toward the extending direction of the fixing member central axis c8. .

そのため、固定部材用孔26の開口26mは、図4Bに示すように突出部8aの長手部8cの幅Wと短手部8dの厚みTとを考慮した上で予め定めたクリアランス分突出部8aより大きく形成されている。   For this reason, the opening 26m of the fixing member hole 26 is formed with a protrusion 8a corresponding to a predetermined clearance in consideration of the width W of the long portion 8c of the protrusion 8a and the thickness T of the short portion 8d as shown in FIG. 4B. It is formed larger.

したがって、扁平形状の突出部8aは、固定部材用孔26内を通過可能である。そして、突出部8aが固定部材用孔26内を通過した後、棒状部8bが上述したように固定部材用孔26内に回動可能に配置される。   Accordingly, the flat protrusion 8 a can pass through the fixing member hole 26. And after the protrusion part 8a passes the inside of the hole 26 for fixing members, the rod-shaped part 8b is rotatably arrange | positioned in the hole 26 for fixing members as mentioned above.

図4Aに示すように内視鏡ノズル5の外周溝5eは、ノズル本体部5bの基端面を段差面23dに当接配置させた状態において、固定部材用孔26の軸の延長上に予め定めた状態に位置する。   As shown in FIG. 4A, the outer peripheral groove 5e of the endoscope nozzle 5 is predetermined on the extension of the shaft of the fixing member hole 26 in a state where the base end surface of the nozzle body 5b is in contact with the step surface 23d. Located in the state.

内視鏡ノズル5を固定部材8によって先端硬質部21に固定する手順を説明する。
まず、作業者は、内視鏡ノズル5を先端硬質部21に取り付けるため、図3の矢印Y3aに示すように該ノズル5のノズル本体部5bをノズル用孔23a内に挿入していく。
A procedure for fixing the endoscope nozzle 5 to the distal end hard portion 21 by the fixing member 8 will be described.
First, the operator inserts the nozzle body 5b of the nozzle 5 into the nozzle hole 23a as shown by an arrow Y3a in FIG. 3 in order to attach the endoscope nozzle 5 to the hard tip portion 21.

そして、作業者は、ノズル本体部5bの基端面を段差面23dに当接させる。この結果、内視鏡ノズル5がノズル用孔23a内に収容配置させる。このことによって、上述したように内視鏡ノズル5の外周溝5eが固定部材用孔26の延長上に位置する。この配置状態において、作業者は、噴出開口5mを観察窓31に向けて配置させる。   And an operator makes the base end surface of the nozzle main-body part 5b contact | abut on the level | step difference surface 23d. As a result, the endoscope nozzle 5 is accommodated in the nozzle hole 23a. Thus, as described above, the outer peripheral groove 5e of the endoscope nozzle 5 is positioned on the extension of the fixing member hole 26. In this arrangement state, the operator arranges the ejection opening 5 m toward the observation window 31.

次に、作業者は、固定部材8の扁平形状の突出部8aを開口26mに向け、図3の矢印Y3bに示すように固定部材用孔26内に挿入する。その際、作業者は、図4A、図4Bに示すように固定部材8の突出部8aをノズル用孔23a内に配置し、内視鏡ノズル5の外周溝5eに向けて押し進めていく。   Next, the operator directs the flat protrusion 8a of the fixing member 8 toward the opening 26m, and inserts it into the fixing member hole 26 as shown by an arrow Y3b in FIG. At that time, as shown in FIGS. 4A and 4B, the operator places the protruding portion 8 a of the fixing member 8 in the nozzle hole 23 a and pushes it toward the outer peripheral groove 5 e of the endoscope nozzle 5.

そして、突出部8aが固定部材用孔26を通過すると、図4Cに示すように突出部8aが外周溝5e内に配置される一方、棒状部8bが固定部材用孔26内に配置される。なお、突出部8aは、外周溝5e内において回動自在であり、棒状部8bは固定部材用孔26内で回動自在である。   When the protruding portion 8a passes through the fixing member hole 26, as shown in FIG. 4C, the protruding portion 8a is arranged in the outer peripheral groove 5e, while the rod-like portion 8b is arranged in the fixing member hole 26. The protruding portion 8a is rotatable in the outer peripheral groove 5e, and the rod-shaped portion 8b is rotatable in the fixing member hole 26.

次いで、作業者は、棒状部8bを図4Dの矢印Y4Dに示す方向、あるいは、この矢印方向とは逆方向に回転させる。すると、棒状部8bの回転に伴って外周溝5e内に配置された突出部8aも同方向に回転を開始する。   Next, the worker rotates the rod-shaped portion 8b in the direction indicated by the arrow Y4D in FIG. 4D or in the direction opposite to the arrow direction. Then, with the rotation of the rod-shaped portion 8b, the protruding portion 8a disposed in the outer circumferential groove 5e also starts to rotate in the same direction.

ここで、作業者は、外周溝5e内に挿入完了された状態に配置されて固定部材用孔26に対して平行な固定部材8の突出部8aの向きが固定部材用孔26に対して略直交した位置関係になるように変位させる。このことによって、突出部8aの向きは、図4Eに示すように外周溝5c内に挿入配置されて挿入完了配置状態時の方向に対して略直交した向きになる。   Here, the operator is arranged in a state where the insertion is completed in the outer peripheral groove 5 e, and the direction of the protruding portion 8 a of the fixing member 8 parallel to the fixing member hole 26 is substantially the same as the fixing member hole 26. It is displaced so as to have an orthogonal positional relationship. As a result, the direction of the protruding portion 8a is substantially perpendicular to the direction in which the protruding portion 8a is inserted and arranged in the outer circumferential groove 5c as shown in FIG. 4E.

そして、作業者が固定部材8を90度回転させてその方向を略直交する方向にした結果、図2、図4Fに示すように固定部材8の突出部8aが内視鏡ノズル5の外周溝5e内に予め定めた状態に配置されると共に、固定部材8の棒状部8bが先端硬質部21の固定部材用孔26内に予め定めた状態に配置されて内視鏡ノズル固定状態になる。   Then, as a result of the operator rotating the fixing member 8 by 90 degrees to make the direction substantially orthogonal, the protruding portion 8a of the fixing member 8 becomes the outer peripheral groove of the endoscope nozzle 5 as shown in FIGS. 5e is arranged in a predetermined state, and the rod-like portion 8b of the fixing member 8 is arranged in a predetermined state in the fixing member hole 26 of the distal end hard portion 21 so that the endoscope nozzle is fixed.

なお、棒状部8bの端面には例えば二点鎖線で示すマイナス形状の凹溝8hが設けられている。したがって、作業者がマイナスドライバー(不図示)の先端を凹溝8hに配置して回転操作することによって、固定部材8が回転される。   A negative groove 8h indicated by a two-dot chain line, for example, is provided on the end face of the rod-like portion 8b. Therefore, the fixing member 8 is rotated when the operator places the tip of a flathead screwdriver (not shown) in the concave groove 8h and rotates it.

そして、図4F等に示した変位させた配置状態において、固定部材8の突出部8aの両端部に設けられた第1当接面8eは、それぞれ外周溝5eの第1壁面5e1、第2壁面5e2に対向して配置されている。
また、棒状部8bの外周面である第3当接面8gは、固定部材用孔26の内面に略当接して配置されている。
また、固定部材8の第2当接面8fは、先端硬質部21に設けられたノズル用孔23aの規制部として機能する内周面に対向して配置されている。
In the displaced arrangement state shown in FIG. 4F and the like, the first contact surfaces 8e provided at both ends of the protruding portion 8a of the fixing member 8 are the first wall surface 5e1 and the second wall surface of the outer circumferential groove 5e, respectively. It is arranged to face 5e2.
Further, the third contact surface 8g which is the outer peripheral surface of the rod-shaped portion 8b is disposed so as to substantially contact the inner surface of the fixing member hole 26.
The second contact surface 8 f of the fixing member 8 is disposed so as to face the inner peripheral surface that functions as a restricting portion of the nozzle hole 23 a provided in the distal end hard portion 21.

したがって、例えば内視鏡ノズル5に対して、該ノズル5を硬質部長手軸a2の外方に移動させる力が作用した場合、外周溝5eの第2壁面5e2が突出部8aの第1当接面8eに当接する一方、棒状部8bの第3当接面8gが固定部材用孔26の内面に当接して係止される。この結果、先端硬質部21と内視鏡ノズル5との硬質部長手軸a2方向の相対位置が固定保持される。   Therefore, for example, when a force is applied to the endoscope nozzle 5 to move the nozzle 5 outward of the hard portion longitudinal axis a2, the second wall surface 5e2 of the outer peripheral groove 5e is the first contact of the protruding portion 8a. While contacting the surface 8e, the third contact surface 8g of the rod-shaped portion 8b contacts and is locked to the inner surface of the fixing member hole 26. As a result, the relative position of the distal end hard portion 21 and the endoscope nozzle 5 in the direction of the hard portion longitudinal axis a2 is fixed and held.

一方、内視鏡ノズル5に対して該ノズル5を固定部材用孔26の開口26m方向へ移動させる力が作用した場合、第2当接面8fがノズル用孔23aの内周面に当接して係止される。この結果、固定部材8が固定部材用孔26の開口26m方向に移動することが規制される。   On the other hand, when a force is applied to the endoscope nozzle 5 to move the nozzle 5 in the direction of the opening 26m of the fixing member hole 26, the second contact surface 8f contacts the inner peripheral surface of the nozzle hole 23a. And locked. As a result, the fixing member 8 is restricted from moving in the direction of the opening 26 m of the fixing member hole 26.

このように、壁面5e1、5e2が第1当接面8eに当接して第3当接面8gが固定部材用孔26の内面に当接することによって先端硬質部21と内視鏡ノズル5との硬質部長手軸a2方向の相対位置を固定保持することができる。一方、第2当接面8fをノズル用孔23aの内周面に当接させて固定部材8が固定部材用孔26の開口26m方向に移動することを規制することができる。   Thus, the wall surfaces 5e1, 5e2 are in contact with the first contact surface 8e and the third contact surface 8g is in contact with the inner surface of the fixing member hole 26, whereby the distal end hard portion 21 and the endoscope nozzle 5 are brought into contact with each other. The relative position in the direction of the hard portion longitudinal axis a2 can be fixed and held. On the other hand, the movement of the fixing member 8 in the direction of the opening 26m of the fixing member hole 26 can be restricted by bringing the second contact surface 8f into contact with the inner peripheral surface of the nozzle hole 23a.

本発明によれば、固定部材8を固定部材用孔26内に挿入した固定部材挿入完了後に固定部材8の位置を挿入時と異なる位置に変位させて、突出部8aを内視鏡ノズル5の外周溝5e内に予め定めた状態に配置させると一方、棒状部8bを先端硬質部21の固定部材用孔26内に予め定めた状態に配置させる。   According to the present invention, after the fixing member 8 is inserted into the fixing member hole 26, the position of the fixing member 8 is displaced to a position different from that at the time of insertion to complete the protrusion 8 a of the endoscope nozzle 5. When the rod-shaped portion 8b is disposed in a predetermined state in the outer peripheral groove 5e, the rod-shaped portion 8b is disposed in a predetermined state in the fixing member hole 26 of the distal end hard portion 21.

この結果、当接面8e、8f、8gが内視鏡ノズル5の所定の部位、あるいは、先端硬質部21の所定の部位に当接して、接着剤等を充填することなく、固定部材8が先端硬質部21から脱落することを防止しつつ、該固定部材8による内視鏡ノズル5の先端硬質部21への固定を実現できる。   As a result, the contact surfaces 8e, 8f, and 8g come into contact with a predetermined part of the endoscope nozzle 5 or a predetermined part of the distal end hard portion 21, and the fixing member 8 is filled without being filled with an adhesive or the like. Fixing the endoscope nozzle 5 to the distal end hard portion 21 by the fixing member 8 can be realized while preventing the distal end rigid portion 21 from falling off.

この構成によれば、固定部材8を90度回転させるだけで、内視鏡ノズル5を先端硬質部21に対して組付け固定状態にすることができるので作業性の大幅な向上を図れる。   According to this configuration, the endoscope nozzle 5 can be assembled and fixed to the distal end hard portion 21 only by rotating the fixing member 8 by 90 degrees, so that the workability can be greatly improved.

なお、上述した固定部材8を図4Dに示した矢印Y4Dとは逆方向に90度回転させた場合、ノズル5を硬質部長手軸a2方向に移動させる力が作用した際に上述した第1当接面8eとは反対側に位置する第1当接面8eが外周溝5eの第1壁面5e1に当接する。   When the fixing member 8 described above is rotated 90 degrees in the direction opposite to the arrow Y4D shown in FIG. 4D, the first contact described above is applied when the force that moves the nozzle 5 in the direction of the hard portion longitudinal axis a2 is applied. The first contact surface 8e located on the opposite side of the contact surface 8e contacts the first wall surface 5e1 of the outer peripheral groove 5e.

また、図4E、図4Fに示す固定状態に配設された固定部材8を取り外す際、該固定部材8を図4Dに示した矢印Y4Dと同じ方向、あるいは、この方向とは逆方向に90度回転させる。このことによって、突出部8aの形状状態が解除されて図4Dに示した位置に復帰されて固定部材8を固定部材用孔26から取り外すことができる。   Further, when removing the fixing member 8 arranged in the fixing state shown in FIGS. 4E and 4F, the fixing member 8 is moved 90 degrees in the same direction as the arrow Y4D shown in FIG. 4D or in the opposite direction. Rotate. As a result, the shape of the protruding portion 8a is released and returned to the position shown in FIG. 4D, so that the fixing member 8 can be removed from the fixing member hole 26.

このように、内視鏡ノズル5の先端硬質部21への固定を、ネジを用いることなく、固定部材8の当接面8e、8f、8gを内視鏡ノズル5の所定の部位、あるいは、先端硬質部21の所定の部位に当接させて実現できるので、先端硬質部21の摩耗や破損を防止して繰り返しの使用によって固定強度が低下することを確実に防止できる。   In this way, the endoscope nozzle 5 is fixed to the distal end hard portion 21 without using screws, and the contact surfaces 8e, 8f, and 8g of the fixing member 8 are fixed portions of the endoscope nozzle 5, or Since it can be realized by contacting a predetermined portion of the distal end hard portion 21, it is possible to prevent the distal end hard portion 21 from being worn or damaged and reliably prevent the fixing strength from being lowered by repeated use.

なお、上述した実施形態においては、内視鏡ノズル5のノズル本体部5bの外周面に凹部となる外周溝5eを設けている。しかし、凹部は、外周溝5eに限定されるものでは無く、図5Aの内視鏡ノズル51に示すようにノズル本体部5bの外周面の予め定めた位置に設けた凹溝52、あるいは、図5Bの内視鏡ノズル55に示すように予め定めた位置に設けた断面形状が円形の有底穴である円形穴56であってもよい。   In the above-described embodiment, the outer peripheral groove 5e serving as a recess is provided on the outer peripheral surface of the nozzle body 5b of the endoscope nozzle 5. However, the concave portion is not limited to the outer peripheral groove 5e, but as shown in the endoscope nozzle 51 of FIG. 5A, the concave groove 52 provided at a predetermined position on the outer peripheral surface of the nozzle body 5b, or FIG. As shown in the endoscope nozzle 55 of 5B, the cross-sectional shape provided in a predetermined position may be a circular hole 56 that is a circular bottomed hole.

そして、凹溝52は、上述した実施形態の外周溝5eと同様に突出部8aが該凹溝52内に配置されるように、幅はwに設定され、深さはdに設定される。一方、円形穴56は、突出部8aが該円形穴56内に配置されるように、直径がwに設定され、深さはdに設定されている。   The width of the concave groove 52 is set to w and the depth is set to d so that the protruding portion 8a is disposed in the concave groove 52 in the same manner as the outer peripheral groove 5e of the above-described embodiment. On the other hand, the diameter of the circular hole 56 is set to w and the depth is set to d so that the protruding portion 8 a is disposed in the circular hole 56.

この構成によれば、上述した実施形態と同様に、開口26mから挿入された固定部材8の突出部8aは、固定部材用孔26内を通過した後、図5Cに示すようにノズル用孔23a内に収容配置された内視鏡ノズル51の凹溝52内、あるいは、内視鏡ノズル55の円形穴56内に配置される。一方、棒状部8bは、上述と同様に固定部材用孔26内に配置される。   According to this configuration, as in the above-described embodiment, the protruding portion 8a of the fixing member 8 inserted from the opening 26m passes through the fixing member hole 26, and then, as shown in FIG. 5C, the nozzle hole 23a. The endoscope nozzle 51 is disposed in the concave groove 52 of the endoscope nozzle 51 or in the circular hole 56 of the endoscope nozzle 55. On the other hand, the rod-like portion 8b is disposed in the fixing member hole 26 as described above.

この固定部材挿入完了配置状態において、突出部8aは、凹溝52内あるいは円形穴56内において回動自在であり、棒状部8bは固定部材用孔26内で回動自在である。したがって、作業者が上述したように棒状部8bを所定の方向に回転させると、棒状部8bの回転に伴って突出部8aが凹溝52内あるいは円形穴56内を同方向に回転する。   In this fixed member insertion completed arrangement state, the projecting portion 8 a is rotatable in the concave groove 52 or the circular hole 56, and the rod-shaped portion 8 b is rotatable in the fixing member hole 26. Therefore, when the worker rotates the rod-shaped portion 8b in a predetermined direction as described above, the protruding portion 8a rotates in the concave groove 52 or the circular hole 56 in the same direction as the rod-shaped portion 8b rotates.

ここで、作業者は、凹溝52内あるいは円形穴56内に配置されて固定部材用孔26に対して平行な突出部8aの向きを図5D、図5Eの破線に示すように略直交した向きに変位させる。つまり、突出部8aの向きを挿入完了配置時の方向に対して略直交した向きにする。   Here, the operator is arranged in the concave groove 52 or in the circular hole 56, and the direction of the protruding portion 8a parallel to the fixing member hole 26 is substantially orthogonal as shown by broken lines in FIGS. 5D and 5E. Displace in the direction. That is, the direction of the protrusion 8a is set to be substantially orthogonal to the direction at the time of the insertion completion arrangement.

すると、図5Dに示すように固定部材8の突出部8aが破線に示す内視鏡ノズル51の凹溝52内に配置される、あるいは、図5Eに示すように固定部材8の突出部8aが二点鎖線に示す内視鏡ノズル55の円形穴56内に予め定めた状態に配置されると共に、図5D、図5Eに示すように固定部材8の棒状部8bが先端硬質部21の固定部材用孔26内に予め定めた状態に配置されて内視鏡ノズル固定状態を得ることができる。   Then, as shown in FIG. 5D, the protruding portion 8a of the fixing member 8 is disposed in the concave groove 52 of the endoscope nozzle 51 shown by a broken line, or as shown in FIG. 5E, the protruding portion 8a of the fixing member 8 is The rod-shaped part 8b of the fixing member 8 is fixed to the distal end hard part 21 as shown in FIGS. 5D and 5E, while being arranged in a predetermined state in the circular hole 56 of the endoscope nozzle 55 shown by the two-dot chain line. The endoscope nozzle fixed state can be obtained by being arranged in a predetermined state in the hole 26.

この配置状態において、固定部材8の突出部8aの両端部に設けられた第1当接面8eは、図5Dに破線で示す凹溝52の第1壁面53、第2壁面54に対向する、あるいは、図5Eに二点鎖線で示す円形穴56の上方側内周面57、あるいは、下方側内周面58に対向する。
そして、棒状部8bの外周面である第3当接面8gは、上述した実施形態と同様に固定部材用孔26の内面に略当接して配置され、固定部材8の第2当接面8fは上述した実施形態と同様に先端硬質部21に設けられたノズル用孔23aの内周面に対向して配置されている。
In this arrangement state, the first contact surfaces 8e provided at both ends of the protruding portion 8a of the fixing member 8 are opposed to the first wall surface 53 and the second wall surface 54 of the recessed groove 52 indicated by broken lines in FIG. 5D. Alternatively, it faces the upper inner peripheral surface 57 or the lower inner peripheral surface 58 of the circular hole 56 shown by a two-dot chain line in FIG. 5E.
The third contact surface 8g, which is the outer peripheral surface of the rod-shaped portion 8b, is disposed substantially in contact with the inner surface of the fixing member hole 26 as in the above-described embodiment, and the second contact surface 8f of the fixing member 8 is arranged. Is disposed opposite to the inner peripheral surface of the nozzle hole 23a provided in the distal end hard portion 21 as in the above-described embodiment.

このように、内視鏡ノズル51、55のノズル本体部5bの外周面に外周溝5eに変えて凹溝52あるいは円形穴56を設けることによって上述した実施形態と同様の作用及び効果を得ることができる。   As described above, by providing the concave groove 52 or the circular hole 56 instead of the outer peripheral groove 5e on the outer peripheral surface of the nozzle main body portion 5b of the endoscope nozzles 51 and 55, the same operation and effect as the above-described embodiment can be obtained. Can do.

なお、上述した実施形態の固定部材8において、突出部8aの長手部8cを棒状部8bの中心を挟んで棒状部8bの外周から両外方側に突出した扁平形状としている。しかし、固定部材の突出部を図6Aに示すように構成してもよい。   In the fixing member 8 of the above-described embodiment, the long portion 8c of the protruding portion 8a has a flat shape that protrudes outward from the outer periphery of the rod-shaped portion 8b across the center of the rod-shaped portion 8b. However, you may comprise the protrusion part of a fixing member as shown to FIG. 6A.

図6Aに示す固定部材8Aは、突出部8Aaと棒状部8bとを有している。棒状部8bの断面形状は、直径Dの円形である。これに対して、突出部8Aaの断面形状は、図6Bに示すように棒状部8bの中心c8から一外方側に突出して形作られた長手部8Acを有する扁平形状である。   The fixing member 8A shown in FIG. 6A has a protruding portion 8Aa and a rod-shaped portion 8b. The cross-sectional shape of the rod-shaped portion 8b is a circle having a diameter D. On the other hand, the cross-sectional shape of the protruding portion 8Aa is a flat shape having a longitudinal portion 8Ac formed to protrude outward from the center c8 of the rod-shaped portion 8b as shown in FIG. 6B.

なお、長手部8Acの幅はW1であって、その他の構成は上述した突出部8aと同様である。   Note that the width of the longitudinal portion 8Ac is W1, and other configurations are the same as those of the protruding portion 8a described above.

本実施形態において、固定部材用孔26Aの開口形状は、図6Cに示すように突出部8Aaの長手部8Acの幅W1と短手部8dの厚みTとを考慮した上で予め定めたクリアランス分突出部8Aaより大きく形成されている。   In the present embodiment, as shown in FIG. 6C, the opening shape of the fixing member hole 26A is set to a predetermined clearance amount in consideration of the width W1 of the long portion 8Ac of the protrusion 8Aa and the thickness T of the short portion 8d. It is formed larger than the protrusion 8Aa.

そして、図6Cに示すように本実施形態の内視鏡ノズル5Aは、外周溝5Aeを有している。外周溝5Aeの幅はW2に設定され、深さはdに設定されている。なお、図6Cの符号5Ae1は第1壁面、符号5Ae2は第2壁面である。   As shown in FIG. 6C, the endoscope nozzle 5A of this embodiment has an outer peripheral groove 5Ae. The width of the outer peripheral groove 5Ae is set to W2, and the depth is set to d. In FIG. 6C, reference numeral 5Ae1 is a first wall surface, and reference numeral 5Ae2 is a second wall surface.

この構成によれば、上述した実施形態と同様に、開口26mから挿入された固定部材8Aの突出部8Aaは、固定部材用孔26A内を通過した後、ノズル用孔23a内に収容配置された内視鏡ノズル5Aの外周溝5Ae内に配置される。一方、棒状部8bは、上述と同様に固定部材用孔26A内に配置される。   According to this configuration, as in the above-described embodiment, the protruding portion 8Aa of the fixing member 8A inserted from the opening 26m passes through the fixing member hole 26A and is then accommodated in the nozzle hole 23a. Arranged in the outer peripheral groove 5Ae of the endoscope nozzle 5A. On the other hand, the rod-like portion 8b is disposed in the fixing member hole 26A as described above.

この配置状態において、突出部8Aaは、外周溝5Ae内において予め定めた範囲内に対して回動自在である。棒状部8bは固定部材用孔26内で回動自在である。したがって、作業者が棒状部8bを所定の方向に回転させると、棒状部8bの回転に伴って突出部8Aaが外周溝5Ae内を同方向に回転する。   In this arrangement state, the protrusion 8Aa is rotatable within a predetermined range in the outer peripheral groove 5Ae. The rod-like portion 8b is rotatable within the fixing member hole 26. Therefore, when the worker rotates the rod-shaped portion 8b in a predetermined direction, the protrusion 8Aa rotates in the outer circumferential groove 5Ae in the same direction as the rod-shaped portion 8b rotates.

ここで、作業者は、外周溝5Ae内に配置されて固定部材用孔26Aに対して平行な突出部8Aaの向きを図6Cの破線に示すように略直交した向きに変位させる。つまり、突出部8Aaの向きを挿入完了配置状態時の方向に対して略直交した向きにする。   Here, the worker displaces the direction of the protrusion 8Aa disposed in the outer circumferential groove 5Ae and parallel to the fixing member hole 26A in a direction substantially orthogonal as shown by a broken line in FIG. 6C. That is, the direction of the protrusion 8Aa is set to be substantially orthogonal to the direction in the insertion completion arrangement state.

すると、固定部材8Aの突出部8Aaが破線に示す内視鏡ノズル5Aの外周溝5Ae内に配置され、固定部材8Aの棒状部8bが先端硬質部21の固定部材用孔26A内に予め定めた状態に配置されて内視鏡ノズル固定状態を得ることができる。   Then, the protruding portion 8Aa of the fixing member 8A is disposed in the outer peripheral groove 5Ae of the endoscope nozzle 5A indicated by the broken line, and the rod-like portion 8b of the fixing member 8A is predetermined in the fixing member hole 26A of the distal end hard portion 21. It is arrange | positioned in a state and can obtain an endoscope nozzle fixed state.

この配置状態において、固定部材8Aの突出部8Aaの端部に設けられた第1当接面8eは、外周溝5Aeの第2壁面5Ae2に対向し、第3当接面8gの延長線上に位置する第1当接面8eは、外周溝5eの第1壁面5Ae1に対向する。   In this arrangement state, the first contact surface 8e provided at the end of the protruding portion 8Aa of the fixing member 8A faces the second wall surface 5Ae2 of the outer peripheral groove 5Ae and is positioned on the extension line of the third contact surface 8g. The first abutting surface 8e that faces the first wall surface 5Ae1 of the outer circumferential groove 5e.

そして、棒状部8bの外周面である第3当接面8gは、上述した実施形態と同様に固定部材用孔26Aの内面に略当接して配置され、固定部材8Aの第2当接面8fは上述した実施形態と同様に先端硬質部21に設けられたノズル用孔23aの内周面に対向して配置されている。   The third contact surface 8g, which is the outer peripheral surface of the rod-shaped portion 8b, is disposed substantially in contact with the inner surface of the fixing member hole 26A, as in the above-described embodiment, and the second contact surface 8f of the fixing member 8A. Is disposed opposite to the inner peripheral surface of the nozzle hole 23a provided in the distal end hard portion 21 as in the above-described embodiment.

この構成によれば、例えば内視鏡ノズル5Aに対して、該ノズル5Aを硬質部長手軸a2の外方に移動させる力が作用した場合、外周溝5Aeの第2壁面5Ae2が突出部8Aaの第1当接面8eに当接する一方、棒状部8bの第3当接面8gが固定部材用孔26の内面に当接して係止される。この結果、先端硬質部21と内視鏡ノズル5との硬質部長手軸a2方向の相対位置が固定保持される。   According to this configuration, for example, when a force that moves the nozzle 5A to the outside of the hard portion longitudinal axis a2 is applied to the endoscope nozzle 5A, the second wall surface 5Ae2 of the outer circumferential groove 5Ae is formed on the protrusion 8Aa. While abutting against the first abutting surface 8e, the third abutting surface 8g of the rod-like portion 8b is abutted against and locked to the inner surface of the fixing member hole 26. As a result, the relative position of the distal end hard portion 21 and the endoscope nozzle 5 in the direction of the hard portion longitudinal axis a2 is fixed and held.

このように、壁面5Ae1、5Ae2が第1当接面8eに当接して第3当接面8gが固定部材用孔26Aの内面に当接して係止されることによって先端硬質部21と内視鏡ノズル5Aとの硬質部長手軸a2方向の相対位置を固定保持することができる。
その他の作用及び効果は上述した実施形態と同様である。
As described above, the wall surfaces 5Ae1 and 5Ae2 are in contact with the first contact surface 8e and the third contact surface 8g is in contact with and locked to the inner surface of the fixing member hole 26A. It is possible to fix and hold the relative position of the mirror nozzle 5A in the direction of the hard portion longitudinal axis a2.
Other operations and effects are the same as those of the above-described embodiment.

なお、図6Dの二点鎖線に示すように外周溝5Beを構成するようにしてもよい。この構成において、作業者は、外周溝5Be内に配置されて固定部材用孔26Aに対して平行な突出部8Aaの向きを破線に示すように略直交した向きに変位させる。そして、突出部8Aaの向きを挿入完了配置状態時の方向に対して略直交した向きにする。   In addition, you may make it comprise outer peripheral groove | channel 5Be as shown to the dashed-two dotted line of FIG. 6D. In this configuration, the operator displaces the direction of the protruding portion 8Aa disposed in the outer circumferential groove 5Be and parallel to the fixing member hole 26A in a direction substantially orthogonal as indicated by a broken line. And the direction of protrusion part 8Aa is made into the direction substantially orthogonal to the direction at the time of an insertion completion arrangement state.

すると、固定部材8Aの突出部8Aaが二点鎖線に示す外周溝5Be内に配置され、固定部材8Aの棒状部8bが先端硬質部21の固定部材用孔26A内に予め定めた状態に配置されて内視鏡ノズル固定状態を得ることができる。   Then, the protruding portion 8Aa of the fixing member 8A is disposed in the outer peripheral groove 5Be indicated by a two-dot chain line, and the rod-shaped portion 8b of the fixing member 8A is disposed in a predetermined state in the fixing member hole 26A of the distal end hard portion 21. Thus, the endoscope nozzle fixed state can be obtained.

この配置状態において、固定部材8Aの突出部8Aaの端部に設けられた第1当接面8eは、外周溝5Beの第1壁面5Be1に対向し、第3当接面8gの延長線上に位置する第1当接面8eは、外周溝5Beの第2壁面5Be2に対向する。   In this arrangement state, the first contact surface 8e provided at the end of the protruding portion 8Aa of the fixing member 8A faces the first wall surface 5Be1 of the outer circumferential groove 5Be and is positioned on the extension line of the third contact surface 8g. The first contact surface 8e that faces the second wall surface 5Be2 of the outer circumferential groove 5Be.

そして、棒状部8bの外周面である第3当接面8gは、上述した実施形態と同様に固定部材用孔26Aの内面に略当接して配置され、固定部材8Aの第2当接面8fは上述した実施形態と同様に先端硬質部21に設けられたノズル用孔23aの内周面に対向して配置されている。   The third contact surface 8g, which is the outer peripheral surface of the rod-shaped portion 8b, is disposed substantially in contact with the inner surface of the fixing member hole 26A, as in the above-described embodiment, and the second contact surface 8f of the fixing member 8A. Is disposed opposite to the inner peripheral surface of the nozzle hole 23a provided in the distal end hard portion 21 as in the above-described embodiment.

この構成によれば、例えば内視鏡ノズル5Aに対して、該ノズル5Aを硬質部長手軸a2の外方に移動させる力が作用した場合、外周溝5Beの第2壁面5Be2が突出部8Aaの第1当接面8eに当接する一方、棒状部8bの第3当接面8gが固定部材用孔26Aの内面に当接して係止される。この結果、先端硬質部21と内視鏡ノズル5Aとの硬質部長手軸a2方向の相対位置が固定保持されて上述した実施形態と同様の作用及び効果を得ることができる。   According to this configuration, for example, when a force that moves the nozzle 5A to the outside of the hard portion longitudinal axis a2 is applied to the endoscope nozzle 5A, the second wall surface 5Be2 of the outer circumferential groove 5Be is formed on the protrusion 8Aa. While abutting against the first abutting surface 8e, the third abutting surface 8g of the rod-like portion 8b is abutted against and locked to the inner surface of the fixing member hole 26A. As a result, the relative position in the direction of the hard portion longitudinal axis a2 between the distal end hard portion 21 and the endoscope nozzle 5A is fixed and held, and the same operations and effects as in the above-described embodiment can be obtained.

上述した実施形態においては、固定部材用孔26内に配置された棒状部8bを固定部材中心軸c8周りに回転させて突出部8aの向きを挿入完了配置状態時の方向に対して略直交した向きに変位させて先端硬質部21と内視鏡ノズル5、5Aとの硬質部長手軸a2方向の相対位置の固定保持、および、固定部材8が固定部材用孔26の開口26m方向に移動することを規制している。   In the above-described embodiment, the rod-like portion 8b arranged in the fixing member hole 26 is rotated around the fixing member central axis c8 so that the direction of the protruding portion 8a is substantially orthogonal to the direction in the insertion completed arrangement state. The distal end hard portion 21 and the endoscope nozzles 5, 5 </ b> A are fixedly held in a relative position in the hard portion longitudinal axis a <b> 2 direction, and the fixing member 8 moves in the direction of the opening 26 m of the fixing member hole 26. It regulates that.

しかし、図7A−図7Cに示すように構成して先端硬質部と内視鏡ノズルとの硬質部長手軸a2方向の相対位置の固定保持、および、固定部材8が固定部材用孔26の開口26m方向に移動することを規制するようにしてもよい。   However, it is configured as shown in FIGS. 7A to 7C, and the relative position of the distal end hard portion and the endoscope nozzle in the direction of the hard portion longitudinal axis a <b> 2 is fixed. The movement in the 26m direction may be restricted.

本実施形態において、第2の孔は、図7Aに示すT字形状の固定部材用孔27である。固定部材用孔27の一方は、先端硬質部21の側面に開口し、他方はノズル用孔23aの内周面に開口している。ノズル用孔23aには例えば内視鏡ノズル5が挿入されるようになっている。   In the present embodiment, the second hole is a T-shaped fixing member hole 27 shown in FIG. 7A. One of the fixing member holes 27 opens on the side surface of the distal end hard portion 21, and the other opens on the inner peripheral surface of the nozzle hole 23a. For example, the endoscope nozzle 5 is inserted into the nozzle hole 23a.

図7A、図7Bに示すように固定部材用孔27は、固定部材挿通孔部27aと、棒状部配置孔部27bと、を有している。棒状部配置孔部27bは、固定部材挿通孔部27aの中途部に直交するように設けられている。   As shown in FIGS. 7A and 7B, the fixing member hole 27 includes a fixing member insertion hole portion 27a and a rod-shaped portion arrangement hole portion 27b. The rod-like portion arrangement hole portion 27b is provided so as to be orthogonal to the midway portion of the fixing member insertion hole portion 27a.

固定部材挿通孔部27aには固定部材8が挿通される。したがって、固定部材挿通孔部27aの開口は、突出部8aの長手部8cの幅Wと短手部8dの厚みTとを考慮した上で、予め定めたクリアランス分突出部8aより大きく形成されている。   The fixing member 8 is inserted through the fixing member insertion hole 27a. Therefore, the opening of the fixing member insertion hole 27a is formed to be larger than the protruding portion 8a by a predetermined clearance in consideration of the width W of the long portion 8c of the protruding portion 8a and the thickness T of the short portion 8d. Yes.

一方、棒状部配置孔部27bには固定部材8の棒状部8bが移動可能に配置される。したがって、本実施形態において、棒状部配置孔部27bは、棒状部8bの直径Dを考慮した上で予め定めたクリアランス分棒状部8bより大きく形成されている。   On the other hand, the rod-shaped portion 8b of the fixing member 8 is movably disposed in the rod-shaped portion arrangement hole 27b. Therefore, in the present embodiment, the rod-shaped portion arrangement hole portion 27b is formed larger than the predetermined clearance portion rod-shaped portion 8b in consideration of the diameter D of the rod-shaped portion 8b.

本実施形態において、固定部材8の突出部8aは、固定部材挿通孔部27aの外周面側の開口から挿入される。図7Cに示すように突出部8aは、固定部材挿通孔部27aを通過した後、ノズル用孔23a内に収容配置された内視鏡ノズル5の外周溝5e内に配置される。一方、棒状部8bは、固定部材挿通孔部27a内において棒状部配置孔部27bの開口近傍に配置される。   In the present embodiment, the protruding portion 8a of the fixing member 8 is inserted from the opening on the outer peripheral surface side of the fixing member insertion hole portion 27a. As shown in FIG. 7C, the protruding portion 8a is disposed in the outer peripheral groove 5e of the endoscope nozzle 5 accommodated in the nozzle hole 23a after passing through the fixing member insertion hole portion 27a. On the other hand, the rod-shaped portion 8b is disposed in the vicinity of the opening of the rod-shaped portion arrangement hole portion 27b in the fixing member insertion hole portion 27a.

この配置状態において、突出部8aは、外周溝5e内に対して移動自在である。一方、棒状部8bは、図7Bの矢印Y7Bに示すように棒状部配置孔部27b内に挿入完了配置状態において該孔部27b内を移動自在である。   In this arrangement state, the protruding portion 8a is movable with respect to the outer peripheral groove 5e. On the other hand, the rod-like portion 8b is movable in the hole portion 27b in the insertion-completed arrangement state in the rod-like portion arrangement hole portion 27b as indicated by an arrow Y7B in FIG. 7B.

したがって、作業者が固定部材挿通孔部27a内に配置されている棒状部8bを棒状部配置孔部27b内に配置させ、その後、棒状部8bを所定の方向に変位させていくことによって、突出部8aが棒状部8bの変位に伴って外周溝5e内を同方向に移動していく。   Therefore, the operator places the rod-like portion 8b arranged in the fixing member insertion hole portion 27a in the rod-like portion arrangement hole portion 27b, and then displaces the rod-like portion 8b in a predetermined direction, thereby protruding. The part 8a moves in the same direction in the outer peripheral groove 5e with the displacement of the rod-like part 8b.

その結果、固定部材8の突出部8aが破線に示すように外周溝5e内の中間部に配置される一方、固定部材8の棒状部8bが先端硬質部21の棒状部配置孔部27b内の中間部に配置されて内視鏡ノズル固定状態を得ることができる。   As a result, the protruding portion 8a of the fixing member 8 is disposed at the intermediate portion in the outer peripheral groove 5e as indicated by the broken line, while the rod-shaped portion 8b of the fixing member 8 is disposed in the rod-shaped portion arrangement hole 27b of the distal end hard portion 21. It is arrange | positioned in an intermediate part and can obtain an endoscope nozzle fixed state.

この配置状態において、固定部材8の突出部8aの端部に設けられた第1当接面8eは、外周溝5eの第1壁面5e1、第2壁面5e2に対向している。また、棒状部8bの外周面である第3当接面8gは、棒状部配置孔部27bの第1内面27b1、第2内面27b2に対向している。   In this arrangement state, the first contact surface 8e provided at the end of the protruding portion 8a of the fixing member 8 faces the first wall surface 5e1 and the second wall surface 5e2 of the outer circumferential groove 5e. The third contact surface 8g, which is the outer peripheral surface of the rod-shaped portion 8b, faces the first inner surface 27b1 and the second inner surface 27b2 of the rod-shaped portion arrangement hole 27b.

この構成によれば、例えば内視鏡ノズル5に対して、該ノズル5を硬質部長手軸a2の外方に移動させる力が作用した場合、外周溝5eの第2壁面5e2が突出部8aの第1当接面8eに当接する。また、棒状部8bの第3当接面8gが棒状部配置孔部27bの第1内面27b1に当接する。この結果、先端硬質部21と内視鏡ノズル5との硬質部長手軸a2方向の相対位置が固定保持される。   According to this configuration, for example, when a force that moves the nozzle 5 to the outside of the hard portion longitudinal axis a2 is applied to the endoscope nozzle 5, the second wall surface 5e2 of the outer peripheral groove 5e is formed on the protruding portion 8a. It contacts the first contact surface 8e. Further, the third contact surface 8g of the rod-shaped portion 8b contacts the first inner surface 27b1 of the rod-shaped portion arrangement hole portion 27b. As a result, the relative position of the distal end hard portion 21 and the endoscope nozzle 5 in the direction of the hard portion longitudinal axis a2 is fixed and held.

一方、内視鏡ノズル5に対して該ノズル5を棒状部配置孔部27bの開口方向へ移動させる力が作用した場合、第2当接面8fがノズル用孔23aの内周面に当接して係止される。この結果、固定部材8が棒状部配置孔部27bの開口27bm方向に移動することが規制される。   On the other hand, when a force is applied to the endoscope nozzle 5 to move the nozzle 5 in the opening direction of the rod-shaped portion arrangement hole 27b, the second contact surface 8f contacts the inner peripheral surface of the nozzle hole 23a. And locked. As a result, the fixing member 8 is restricted from moving in the direction of the opening 27bm of the rod-like portion arrangement hole 27b.

このように、本実施形態においては、固定部材8を固定部材中心軸c8周りに回転させることなく棒状部配置孔部27b内をスライド移動させて変位させる。このことによって、壁面5e1、5e2が第1当接面8eに当接すると共に第3当接面8gが内面27b1、27b2に当接して先端硬質部21と内視鏡ノズル5との硬質部長手軸a2方向の相対位置を固定保持することができる。一方、第2当接面8がノズル用孔23aの内周面に当接して固定部材8が棒状部配置孔部27bの開口27bm方向に移動することを規制することができる。   As described above, in the present embodiment, the fixing member 8 is slid and displaced in the rod-like portion arrangement hole 27b without rotating around the fixing member central axis c8. As a result, the wall surfaces 5e1 and 5e2 come into contact with the first contact surface 8e, and the third contact surface 8g comes into contact with the inner surfaces 27b1 and 27b2, and the hard portion longitudinal axis of the distal end hard portion 21 and the endoscope nozzle 5 The relative position in the a2 direction can be fixed and held. On the other hand, the second abutting surface 8 abuts against the inner peripheral surface of the nozzle hole 23a, and the movement of the fixing member 8 in the direction of the opening 27bm of the rod-like portion arrangement hole portion 27b can be restricted.

この結果、接着剤等を充填することなく、固定部材8が先端硬質部21から脱落することを防止しつつ、該固定部材8による内視鏡ノズル5の先端硬質部21への固定を実現できる。その他の作用及び効果は上述した実施形態と同様である。   As a result, the fixing member 8 can be fixed to the distal end hard portion 21 by the fixing member 8 while preventing the fixing member 8 from falling off the distal end hard portion 21 without filling with an adhesive or the like. . Other operations and effects are the same as those of the above-described embodiment.

図8Aに示すように本実施形態においては、基盤部材を先端硬質部21とカバー部材28とで構成している。カバー部材28は、筒形状であって、先端硬質部21の先端面、および、側面の一部を覆うように一体に設けられて先端部2を構成する。本実施形態において、ノズル部5aは、カバー部材28の先端面28fより先端側に突出している。   As shown in FIG. 8A, in the present embodiment, the base member is composed of the distal end hard portion 21 and the cover member 28. The cover member 28 has a cylindrical shape, and is provided integrally so as to cover the distal end surface of the distal end hard portion 21 and a part of the side surface thereof, thereby constituting the distal end portion 2. In the present embodiment, the nozzle portion 5 a protrudes from the front end surface 28 f of the cover member 28 toward the front end side.

図8A、図8Bに示すようにカバー部材28の先端面28fにはカバー側ノズル用孔28a、観察窓用孔28b、図示されていない照明窓用孔、チャンネル用孔等が形成されている。一方、カバー部材28の側面にはカバー側固定部材用孔28cが形成されている。カバー側固定部材用孔28cは、一方がカバー部材外周面に開口を有して他方がカバー部材内周面に開口を有している。   As shown in FIGS. 8A and 8B, a cover-side nozzle hole 28a, an observation window hole 28b, an illumination window hole, a channel hole, etc., not shown, are formed on the front end surface 28f of the cover member 28. On the other hand, a cover-side fixing member hole 28 c is formed on the side surface of the cover member 28. One of the cover-side fixing member holes 28c has an opening on the outer peripheral surface of the cover member, and the other has an opening on the inner peripheral surface of the cover member.

符号29は、固定部材配置用孔である。固定部材8Bは、カバー側固定部材用孔28c内、固定部材配置用孔29内、および、外周溝5e内に予め定めた状態で配設されるようになっている。したがって、本実施形態において、第1の孔に連通する第2の孔は、カバー側固定部材用孔28cと固定部材配置用孔29とで構成されている。カバー側固定部材用孔28cの内面と固定部材配置用孔29の内面とは平滑面である。   Reference numeral 29 denotes a fixing member arranging hole. The fixing member 8B is arranged in a predetermined state in the cover side fixing member hole 28c, the fixing member arrangement hole 29, and the outer peripheral groove 5e. Therefore, in the present embodiment, the second hole communicating with the first hole is constituted by the cover side fixing member hole 28 c and the fixing member arrangement hole 29. The inner surface of the cover side fixing member hole 28c and the inner surface of the fixing member arranging hole 29 are smooth surfaces.

図8B、図8Cに示すように固定部材配置用孔29の断面形状は、四角形形状であって縦寸法は外周溝5eの幅wと同寸法に設定し、横寸法は幅w寸法より大きく設定してある。   As shown in FIGS. 8B and 8C, the cross-sectional shape of the fixing member arranging hole 29 is a square shape, the vertical dimension is set to the same dimension as the width w of the outer peripheral groove 5e, and the horizontal dimension is set to be larger than the width w dimension. It is.

本実施形態の固定部材8Bは、図8B、図8C、図8Dに示すように突出部8Baと棒状部8Bbとを有している。棒状部8Bbの断面形状は、上述と同様に直径Dの円形である。突出部8Baの断面形状は、上述と同様に棒状部8Bbの中心c8に対して外形が円形ではない不定な形状であって、長手部8cと短手部8dとを有する、扁平形状である。   As shown in FIGS. 8B, 8C, and 8D, the fixing member 8B of the present embodiment has a protruding portion 8Ba and a rod-shaped portion 8Bb. The cross-sectional shape of the rod-shaped portion 8Bb is a circle having a diameter D as described above. The cross-sectional shape of the protruding portion 8Ba is an indefinite shape whose outer shape is not circular with respect to the center c8 of the rod-like portion 8Bb as described above, and is a flat shape having a long portion 8c and a short portion 8d.

短手部8dの厚みTは、棒状部8Bbの直径Dと同じである。長手部8cは、棒状部8Bbの外周面から両外方側に突出し、中心c8より等距離離間した位置に設けられている。長手部8cの端部は、例えば直径Dの半円形状であって半円形状の端部端面は平滑面である。   The thickness T of the short part 8d is the same as the diameter D of the rod-like part 8Bb. The longitudinal portion 8c protrudes outward from the outer peripheral surface of the rod-like portion 8Bb, and is provided at a position equidistant from the center c8. The end portion of the longitudinal portion 8c is, for example, a semicircular shape having a diameter D, and the end surface of the semicircular end portion is a smooth surface.

符号8eは第1当接面であって長手部8cの両端部の頂点である。符号8fは第2当接面であって、突出部8Baと棒状部8Bbとの段差面である。棒状部8Bbの外周面は、第3当接面8gとしての機能を有している。   Reference numeral 8e denotes a first contact surface, which is the apex of both end portions of the longitudinal portion 8c. Reference numeral 8f denotes a second contact surface, which is a step surface between the protruding portion 8Ba and the rod-shaped portion 8Bb. The outer peripheral surface of the rod-like portion 8Bb has a function as the third contact surface 8g.

本実施形態において、突出部8Baの長さはL3に設定され、棒状部8Bbの長さはL4に設定されている。突出部8Baの長さL3は、図8Bに示す外周溝5eの深さdと固定部材配置用孔29の距離L5とを合わせた寸法より予め定めたクリアランス分だけ小さく設定されている。一方、棒状部8Bbの長さL4は、カバー側固定部材用孔28cの外周面側開口28cmから突出しないように設定されている。   In the present embodiment, the length of the protruding portion 8Ba is set to L3, and the length of the rod-shaped portion 8Bb is set to L4. The length L3 of the protrusion 8Ba is set to be smaller by a predetermined clearance than the dimension obtained by combining the depth d of the outer peripheral groove 5e and the distance L5 of the fixing member arranging hole 29 shown in FIG. 8B. On the other hand, the length L4 of the rod-like portion 8Bb is set so as not to protrude from the outer peripheral surface side opening 28cm of the cover side fixing member hole 28c.

本実施形態において、作業者は、固定部材8Bの突出部8Baを図8Bに示すようにカバー側固定部材用孔28cの外周面側開口28cmから挿入する。   In this embodiment, the operator inserts the protrusion 8Ba of the fixing member 8B from the outer peripheral surface side opening 28cm of the cover-side fixing member hole 28c as shown in FIG. 8B.

図8Eに示すように突出部8Baは、カバー側固定部材用孔28cを通過することによって、ノズル用孔23a内に収容配置された内視鏡ノズル5の外周溝5e内及び固定部材配置用孔29内に配置される。一方、棒状部8Bbは、カバー側固定部材用孔28c内に配置される。   As shown in FIG. 8E, the protruding portion 8Ba passes through the cover-side fixing member hole 28c, thereby allowing the protrusion 8Ba to pass through the outer peripheral groove 5e of the endoscope nozzle 5 accommodated in the nozzle hole 23a and the fixing member arranging hole. 29. On the other hand, the rod-like portion 8Bb is disposed in the cover-side fixing member hole 28c.

この配置状態において、突出部8Baは、外周溝5e及び固定部材配置用孔29内で回動自在である。一方、棒状部8bは、カバー側固定部材用孔28c内で回動自在である。   In this arrangement state, the protrusion 8Ba is rotatable within the outer peripheral groove 5e and the fixing member arrangement hole 29. On the other hand, the rod-shaped portion 8b is rotatable within the cover side fixing member hole 28c.

ここで、作業者は、上述したように棒状部8Bbを固定部材中心軸c8周りに回動させる。すると、棒状部8Bbの回転に伴って突出部8Baも同方向に回転を開始する。   Here, the worker rotates the rod-like portion 8Bb around the fixed member central axis c8 as described above. Then, with the rotation of the rod-shaped portion 8Bb, the protruding portion 8Ba also starts rotating in the same direction.

ここで、作業者は、外周溝5e内および固定部材配置用孔29内に挿入配置した後、カバー側固定部材用孔28cに対して平行な突出部8Aaの向きを略直交した位置関係になるように変位させる。このことによって、突出部8Baの向きが、図8Cの破線、図8Fに示すように挿入完了配置状態時の方向に対して略直交した向きになる。   Here, after the operator inserts and arranges in the outer peripheral groove 5e and the fixing member arranging hole 29, the orientation of the protruding portion 8Aa parallel to the cover side fixing member hole 28c is substantially orthogonal. Displace as follows. As a result, the direction of the protruding portion 8Ba becomes substantially perpendicular to the direction in the insertion completed arrangement state as shown by the broken line in FIG. 8C and FIG. 8F.

このことによって、突出部8Baの長手部8cの第1当接面8eが外周溝5eの第1壁面5e1と第2壁面5e2とにそれぞれ対向して配置されるとともに、固定部材配置用孔29の第1面29aと第2面29bとにそれぞれ対向して配置される。一方、棒状部8Bbの外周面である第3当接面8gは、カバー側固定部材用孔28cの内面に対して予め定めた距離離間して配置されている。   As a result, the first contact surface 8e of the longitudinal portion 8c of the protrusion 8Ba is disposed to face the first wall surface 5e1 and the second wall surface 5e2 of the outer peripheral groove 5e, respectively, and the fixing member arranging hole 29 The first surface 29a and the second surface 29b are disposed to face each other. On the other hand, the third contact surface 8g, which is the outer peripheral surface of the rod-shaped portion 8Bb, is arranged at a predetermined distance from the inner surface of the cover-side fixing member hole 28c.

したがって、例えば内視鏡ノズル5に対して、該ノズル5を硬質部長手軸a2の外方に移動させる力が作用した場合、外周溝5eの第2壁面5e2が突出部8Aaの第1当接面8eに当接する一方、突出部8Aaの第1当接面8eが固定部材配置用孔29の第1面29aに当接する。この結果、先端硬質部21と内視鏡ノズル5との硬質部長手軸a2方向の相対位置が固定保持される。   Therefore, for example, when a force that moves the nozzle 5 to the outside of the hard portion longitudinal axis a2 is applied to the endoscope nozzle 5, the second wall surface 5e2 of the outer circumferential groove 5e is the first contact of the protruding portion 8Aa. While contacting the surface 8e, the first contact surface 8e of the protrusion 8Aa contacts the first surface 29a of the fixing member arranging hole 29. As a result, the relative position of the distal end hard portion 21 and the endoscope nozzle 5 in the direction of the hard portion longitudinal axis a2 is fixed and held.

一方、内視鏡ノズル5に対して該ノズル5を固定部材用孔26の開口26m方向へ移動させる力が作用した場合、第2当接面8fがカバー部材28の規制部である内周面に当接して係止される。この結果、固定部材8Bがカバー側固定部材用孔28cの外周面側開口28cm方向に移動することが規制される。   On the other hand, when a force that moves the nozzle 5 in the direction of the opening 26m of the fixing member hole 26 acts on the endoscope nozzle 5, the second contact surface 8f is an inner peripheral surface that is a restriction portion of the cover member 28. Is abutted and locked. As a result, the fixing member 8B is restricted from moving in the direction of the outer peripheral surface side opening 28cm of the cover side fixing member hole 28c.

このように、第1当接面8eが外周溝5eの壁面5e1、5e2に当接するとともに、固定部材配置用孔29の面29a、29bに当接することによって先端硬質部21と内視鏡ノズル5との硬質部長手軸a2方向の相対位置を固定保持することができる。一方、第2当接面8fをカバー部材28の内周面に当接して係止されて固定部材8Bがカバー側固定部材用孔28cの外周面側開口28cm方向に移動することを規制することができる。   Thus, the first contact surface 8e contacts the wall surfaces 5e1, 5e2 of the outer peripheral groove 5e and also contacts the surfaces 29a, 29b of the fixing member arranging hole 29, whereby the distal end hard portion 21 and the endoscope nozzle 5 are contacted. The relative position in the direction of the hard part longitudinal axis a2 can be fixed and held. On the other hand, the second abutting surface 8f is abutted and locked to the inner peripheral surface of the cover member 28 to restrict the fixing member 8B from moving in the direction of the outer peripheral surface side opening 28cm of the cover-side fixing member hole 28c. Can do.

本発明は、以上述べた実施形態のみに限定されるものではなく、発明の要旨を逸脱しない範囲で種々変形実施可能である。
例えば、本発明の部品固定構造を、対物光学系3等を固定する固定構造として使用しても良い。
The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.
For example, the component fixing structure of the present invention may be used as a fixing structure for fixing the objective optical system 3 or the like.

1…内視鏡 2…挿入部先端部 2f…先端面 2m…チャンネル開口 3…対物光学系 4…照明光学系 5…内視鏡ノズル 5a…ノズル部 5b…ノズル本体部 5c…流路 5c…外周溝 5d…流路 5e…外周溝 5m…噴出開口 6…挿入部 8…固定部材 8a…突出部 8b…棒状部 8c…長手部 8d…短手部 8e…第1当接面 8f…第2当接面 8g…第3当接面 8h…凹溝 21…先端硬質部 21f…先端面 22…観察光学系用孔 22a…細径孔 22b…太径孔 23…流体供給用孔 23a…ノズル用孔 23b…接続パイプ孔 23c…チューブ孔 23d…段差面 24…接続パイプ 25…送気送水チューブ 26…固定部材用孔 26m…開口 27…固定部材用孔 27a…固定部材挿通孔部 27b…棒状部配置孔部 28…カバー部材 28a…カバー側ノズル用孔 28b…観察窓用孔 28c…カバー側固定部材用孔 28cm…外周面側開口 28f…先端面 29…固定部材配置用孔 29a…第1面 29b…第2面 31…観察窓 32…レンズ保持枠 33…撮像枠 34…光学レンズ 35…撮像素子 36…撮像ユニット 41…照明窓 DESCRIPTION OF SYMBOLS 1 ... Endoscope 2 ... Insertion part front-end | tip part 2f ... Front end surface 2m ... Channel opening 3 ... Objective optical system 4 ... Illumination optical system 5 ... Endoscope nozzle 5a ... Nozzle part 5b ... Nozzle main-body part 5c ... Flow path 5c ... Outer peripheral groove 5d ... Flow path 5e ... Outer peripheral groove 5m ... Ejection opening 6 ... Insertion part 8 ... Fixing member 8a ... Projection part 8b ... Bar-shaped part 8c ... Longer part 8d ... Short part 8e ... First contact surface 8f ... Second Contact surface 8g ... Third contact surface 8h ... Concave groove 21 ... Hard tip 21f ... Tip surface 22 ... Observation optical system hole 22a ... Small diameter hole 22b ... Large diameter hole 23 ... Fluid supply hole 23a ... For nozzle Hole 23b ... Connection pipe hole 23c ... Tube hole 23d ... Step surface 24 ... Connection pipe 25 ... Air supply / water supply tube 26 ... Fixing member hole 26m ... Opening 27 ... Fixing member hole 27a ... Fixing member insertion hole 27b ... Bar-shaped part Arrangement Hole 28 ... Cover member 28a ... Cover side nozzle hole 28b ... Observation window hole 28c ... Cover side fixing member hole 28cm ... Peripheral surface side opening 28f ... Tip surface 29 ... Fixing member placement hole 29a ... First surface 29b ... 2nd surface 31 ... Observation window 32 ... Lens holding frame 33 ... Imaging frame 34 ... Optical lens 35 ... Imaging element 36 ... Imaging unit 41 ... Illumination window

Claims (8)

所定の軸方向に沿って設けられている第1の孔、および、一方が側面に開口を有して他方が該第1の孔に連通する第2の孔、が設けられている基盤部材と、
前記第1の孔内に予め定めた状態に配置されて前記第2の孔の延長上に溝が位置するように形成された被固定部材と、
前記側面の開口から前記第2の孔に挿入されて前記被固定部材の溝内に予め定めた状態に配置されて前記第2の孔が形成する面、および、前記溝が形成する壁面に当接し、前記基盤部材と前記被固定部材との前記軸方向の相対位置を固定する固定部材と、
前記固定部材に設けられ、該固定部材が予め定めた状態で前記第2の孔内及び前記溝内に挿入された後に当該固定部材を該挿入された方向と略直交する方向に予め定めた量変位または回転されて、前記固定部材に対して該固定部材を該第2の孔から抜去させる方向の力が作用された際に前記基盤部材または前記被固定部材に当接して当該固定部材の前記第2の孔の開口方向への移動を規制する突出部と、
を備えることを特徴とする部品固定構造。
A base member provided with a first hole provided along a predetermined axial direction, and a second hole in which one has an opening on a side surface and the other communicates with the first hole; ,
A fixed member disposed in a predetermined state in the first hole and formed so that a groove is positioned on an extension of the second hole;
The second hole is inserted into the second hole through the opening on the side surface and is disposed in a predetermined state in the groove of the fixed member, and the surface formed by the second hole and the wall surface formed by the groove. A fixing member that contacts and fixes the relative position in the axial direction of the base member and the fixed member;
A predetermined amount provided in the fixing member, and after the fixing member is inserted into the second hole and the groove in a predetermined state, the fixing member is set in a direction substantially orthogonal to the inserted direction. When the force in the direction for removing the fixing member from the second hole is applied to the fixing member by being displaced or rotated, the base member or the member to be fixed comes into contact with the base member or the fixing member. A protrusion for restricting movement of the second hole in the opening direction;
A component fixing structure comprising:
前記基盤部材は、変位または回転された前記固定部材に前記第2の孔から抜去させる方向の力が作用した際に前記突出部を係止して、前記固定部材の前記第2の孔の開口方向への移動を規制する規制部を有することを特徴とする請求項1に記載の部品固定構造。   The base member locks the protruding portion when a force in a direction to be removed from the second hole acts on the displaced or rotated fixing member, and the opening of the second hole of the fixing member The component fixing structure according to claim 1, further comprising a restricting portion that restricts movement in the direction. 前記固定部材の突出部は、挿入方向に略平行な固定部材中心軸周りに回転され、該回転軸を中心とした外形が不定となるよう形成され、
前記溝の幅は、前記固定部材が挿入完了された状態において前記固定部材が所定の角度まで回転可能な寸法を有して形成されており、
前記固定部材が前記溝に挿入されて前記所定の角度で回転された状態において、前記固定部材は前記溝が形成する壁面に当接して前記軸方向に固定される
ことを特徴とする請求項1に記載の部品固定構造。
The protruding portion of the fixing member is rotated around a central axis of the fixing member that is substantially parallel to the insertion direction, and is formed so that an outer shape around the rotation axis is indefinite,
The width of the groove is formed so that the fixing member can be rotated to a predetermined angle in a state where the fixing member is completely inserted.
The fixed member is in contact with a wall surface formed by the groove and fixed in the axial direction in a state where the fixing member is inserted into the groove and rotated at the predetermined angle. The component fixing structure described in 1.
前記固定部材の突出部は、挿入方向に略平行な固定部材中心軸周りに回転され、該回転軸を中心とした外形が不定となるよう形成され、
前記溝の幅は、前記固定部材が挿入された状態において前記突出部が所定の角度まで回転可能な寸法を有して形成され、
前記固定部材が前記溝内に挿入完了された後に前記所定の角度で回転された状態において、前記固定部材の前記突出部が形成されている方向の外形が前記第2の孔の内径より大きいことを特徴とする請求項1に記載の部品固定構造。
The protruding portion of the fixing member is rotated around a central axis of the fixing member that is substantially parallel to the insertion direction, and is formed so that an outer shape around the rotation axis is indefinite,
The width of the groove is formed so that the protrusion is rotatable to a predetermined angle in a state where the fixing member is inserted,
The outer shape of the fixing member in the direction in which the protrusion is formed is larger than the inner diameter of the second hole in a state in which the fixing member is rotated at the predetermined angle after the fixing member is completely inserted into the groove. The component fixing structure according to claim 1.
前記固定部材は、前記突出部が前記規制部に係止された状態からさらに所定の角度回転されることで係止状態が解除されることを特徴とする請求項2に記載の部品固定構造。   The component fixing structure according to claim 2, wherein the fixing member is released from the locked state by being further rotated by a predetermined angle from the state in which the protruding portion is locked to the restricting portion. 前記基盤部材は、ブロック部材と前記ブロック部材の先端面の少なくとも一部と側面の少なくとも一部を覆うカバー部材からなることを特徴とする請求項1に記載の部品固定構造。   The component fixing structure according to claim 1, wherein the base member includes a block member and a cover member that covers at least a part of a front end surface of the block member and at least a part of a side surface. 前記基盤部材の前記第2の孔が形成する面は、平滑面であることを特徴とする請求項1に記載の部品固定構造。   The component fixing structure according to claim 1, wherein a surface formed by the second hole of the base member is a smooth surface. 被検体へ挿入される挿入部の先端部に、請求項1から請求項7のいずれか一項に記載の部品固定構造を設けたことを特徴とする内視鏡。   An endoscope comprising the component fixing structure according to any one of claims 1 to 7 provided at a distal end portion of an insertion portion to be inserted into a subject.
JP2017030036A 2017-02-21 2017-02-21 Component fixing structure and endoscope Pending JP2018134190A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020151101A (en) * 2019-03-19 2020-09-24 オリンパス株式会社 Endoscope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020151101A (en) * 2019-03-19 2020-09-24 オリンパス株式会社 Endoscope
JP7110146B2 (en) 2019-03-19 2022-08-01 オリンパス株式会社 Endoscope

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