JP2020174793A

JP2020174793A - Connection structure, connection adapter, and endoscope

Info

Publication number: JP2020174793A
Application number: JP2019078018A
Authority: JP
Inventors: 元起小林; Genki Kobayashi
Original assignee: Hoya Corp
Current assignee: Hoya Corp
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-10-29

Abstract

To provide a connection structure and the like that enable air-supply and water-supply tubes extending from air-supply and water-supply devices to be securely connected to air-supply and water-supply channels of an endoscope with simple operation, and that make it easy to clean and disinfect the endoscope after use.SOLUTION: The connection structure includes: a female mouthpiece 8 provided at a connection end of air-supply and water-supply channels 40 continuous to the tip of an endoscope; a male mouthpiece 9 provided on a connection adapter 10 having a connection port 11 for connecting air-supply and water-supply tubes extending from air-supply and water-supply devices, and fitted and connected to the female mouthpiece 8; and a rotary ring 100 that is held by the male mouthpiece 9, rotates around an eccentric axis by an operation when fitted to the female mouthpiece 8, and engages with the flange-shaped engaging portion 80 circumferentially provided along the inner circumference of the opening of the female mouthpiece so as to fix the male mouthpiece 9 for preventing the male mouthpiece from being pulled out.SELECTED DRAWING: Figure 2

Description

本発明は、内視鏡の送気、送水路への接続構造等に関する。 The present invention relates to an air supply of an endoscope, a connection structure to a water supply channel, and the like.

内視鏡は、体腔内に挿入することで所望の箇所の観察、処置を可能とする医療用機器であり、体腔内に挿入される先端部からの送気、送水を可能としている（例えば、特許文献１参照）。送気は、体腔内への挿入時に体腔を膨らませるために実施され、処置内容によっては、体腔内の滞留ガスを不燃性の炭酸ガス（ＣＯ₂ガス）に置換するために実施される。送水は、先端部に設けられた撮像用の窓部の洗浄、体腔内の観察、処置部位の洗浄等を目的として実施される。 An endoscope is a medical device that enables observation and treatment of a desired location by being inserted into a body cavity, and enables air supply and water supply from a tip portion inserted into the body cavity (for example,). See Patent Document 1). Insufflation is performed to inflate the body cavity when inserted into the body cavity, and depending on the procedure, it is performed to replace the retained gas in the body cavity with nonflammable carbon dioxide gas (CO ₂ gas). The water supply is carried out for the purpose of cleaning the window for imaging provided at the tip, observing the inside of the body cavity, cleaning the treatment site, and the like.

送気、送水は、内視鏡の先端部に連続する送気、送水路に、送気、送水装置から延びる送気、送水管を接続することで実施される。送気、送水路と送気、送水管とは、内視鏡のコネクタ部において、夫々の接続端部に設けた雌口金及び雄口金を嵌め合わせて接続されており、送気、送水源からの送気、送水は、送気管、送水管及び送気、送水路を経て先端部から送り出される。 Air supply and water supply are carried out by connecting the air supply, the air supply extending from the water supply device, and the water supply pipe to the air supply and water supply channels that are continuous to the tip of the endoscope. The air supply / water channel and the air supply / water pipe are connected by fitting the female and male caps provided at the respective connection ends at the connector portion of the endoscope, and are connected from the air supply and water supply sources. The air supply and water supply are sent out from the tip portion via the air supply pipe, the water supply pipe, the air supply, and the water supply channel.

特許第２６２７５２０号公報Japanese Patent No. 2627520

以上の如き送気、送水装置において、送気、送水路と送気、送水管との接続は、内視鏡の使用中における不可避の外力の作用時においても維持される必要がある。特許文献１には、送気、送水路の端部の雌口金をコネクタ部の外面に突設し、この雌口金に送気、送水管の端部に設けた雄口金を嵌め合わせ、雌口金の外周に形成されたねじ部に螺合する環状の押えナットの締め付けにより雄口金を押えることで接続状態を維持する接続構造が開示されている。 In the above-mentioned air supply and water supply devices, the connection between the air supply and the water supply channel and the air supply and the water supply pipe needs to be maintained even when an unavoidable external force acts during the use of the endoscope. In Patent Document 1, a female cap at the end of an air supply / water supply channel is projected onto the outer surface of the connector portion, and a male cap provided at the end of the air supply / water pipe is fitted to the female cap to fit the female cap. A connection structure for maintaining a connected state by pressing a male mouthpiece by tightening an annular presser nut that is screwed into a threaded portion formed on the outer periphery of the water pipe is disclosed.

この接続構造においては、押えナットの締め付け操作に手間を要し、不完全な締め付けがなされた場合、接続不良が生じる虞がある。また、前述した炭酸ガスの送気は、送気、送水路の端部に同様の接続構造にて接続された接続アダプタを介して行われるが、締め付けが不完全な場合、高圧の炭酸ガスの漏れ出し、更には、雄口金の抜けが懸念される。 In this connection structure, it takes time and effort to tighten the presser nut, and if the presser nut is incompletely tightened, a connection failure may occur. Further, the above-mentioned carbon dioxide gas supply is performed via a connection adapter connected to the end of the air supply and water supply channels with the same connection structure, but when tightening is incomplete, high-pressure carbon dioxide gas is supplied. There is concern about leakage and even the loss of the male mouthpiece.

一方、内視鏡は、使用後に洗浄、消毒して保管されるが、コネクタ部の外面に突設された雌口金、及びこの雌口金の外周に形成されたねじ部が、洗浄、消毒作業を阻害する上、洗浄、消毒作業中に内視鏡の他部、特に、体腔内への挿入部に含まれる軟性部を衝突により傷付ける虞があり、慎重な作業を強いられるという問題もある。 On the other hand, the endoscope is cleaned, disinfected and stored after use, but the female mouthpiece protruding from the outer surface of the connector part and the threaded part formed on the outer circumference of the female mouthpiece perform cleaning and disinfecting work. In addition to hindering the cleaning and disinfection work, there is a risk that the other part of the endoscope, particularly the soft part contained in the insertion part into the body cavity, may be damaged by the collision, and there is also a problem that careful work is required.

本開示の目的は、送気、送水路と送気、送水管との確実な接続を簡易な操作により実現し、また使用後の内視鏡の洗浄、消毒作業を容易化することである。 An object of the present disclosure is to realize reliable connection between air supply, water supply channel and air supply, and water supply pipe by a simple operation, and to facilitate cleaning and disinfection work of the endoscope after use.

本開示に係る接続構造は、内視鏡の先端部に連続する送気、送水路に、送気、送水装置から延びる送気、送水管を接続する接続構造において、前記送気、送水路の接続端部に設けられた円筒形の雌口金と、前記送気、送水管の接続端部に設けられ、前記雌口金に嵌合接続される円筒形の雄口金と、該雄口金に保持され、前記雌口金との嵌合下での操作により該雌口金の内周部に係合して前記雄口金を抜け止め固定するロック部材とを備える。 The connection structure according to the present disclosure is a connection structure for connecting an air supply, an air supply extending from a water supply device, and a water supply pipe to an air supply / water supply channel continuous to the tip of the endoscope, and the air supply / water supply channel A cylindrical female mouthpiece provided at the connection end, a cylindrical male mouthpiece provided at the connection end of the air supply / water supply pipe and fitted and connected to the female mouthpiece, and held by the male mouthpiece. A lock member is provided which engages with the inner peripheral portion of the female mouthpiece by an operation under fitting with the female mouthpiece to prevent and fix the male mouthpiece.

また、前記ロック部材は、前記雄口金に偏心軸周りでの回転可能に外嵌保持され、所定の回転位置で前記雌口金に係合する回転環を備える。 Further, the lock member includes a rotating ring that is rotatably held on the male mouthpiece about an eccentric axis and engages with the female mouthpiece at a predetermined rotation position.

また、前記回転環の回転を、前記雌口金との係合位置及び非係合位置で夫々規制する規制部を備える。 Further, it is provided with a regulating unit that regulates the rotation of the rotating ring at the engaged position and the non-engaged position with the female mouthpiece, respectively.

また、前記ロック部材は、前記雄口金に外嵌保持され、前記雌口金との嵌合下で弾性的に拡径して該雌口金に係合する止め輪と、前記雄口金に軸長方向への移動可能に外嵌保持され、所定の移動位置で前記止め輪を拡径方向に付勢する移動環とを備える。 Further, the lock member is externally fitted and held by the male mouthpiece, and elastically expands in diameter under fitting with the female mouthpiece to engage with the female mouthpiece, and a retaining ring and the male mouthpiece in the axial length direction. It is provided with a moving ring that is movably held on the outside and urges the retaining ring in the diameter-expanding direction at a predetermined moving position.

また、前記移動環は、前記雄口金の外周に形成されたねじ部に螺合されており、回転操作により軸長方向に螺進移動する。 Further, the moving ring is screwed into a screw portion formed on the outer circumference of the male mouthpiece, and is screwed in the axial length direction by a rotation operation.

また、本開示に係る接続アダプタは、内視鏡の送気、送水路に送気、送水装置を接続する接続アダプタにおいて、前記送気、送水装置から延びる送気、送水管が接続される第１接続口と、炭酸ガスボンベが接続される第２接続口と、前記第１接続口及び第２接続口に連続する通気、通水路と、該通気、通水路の端部に設けられ、前記送気、送水路の接続端部に設けられた雌口金に嵌合接続される雄口金と、該雄口金に保持され、前記雌口金との嵌合下での操作により該雌口金の内周部に係合して前記雄口金を抜け止め固定するロック部材とを備える。 Further, the connection adapter according to the present disclosure is a connection adapter for connecting an air supply of an endoscope, an air supply to a water supply channel, and a water supply device, to which the air supply, the air supply extending from the water supply device, and the water supply pipe are connected. The first connection port, the second connection port to which the carbon dioxide gas cylinder is connected, the ventilation and the water passage that are continuous to the first connection port and the second connection port, and the ventilation and the water passage provided at the end of the water passage. The male mouthpiece that is fitted and connected to the female mouthpiece provided at the connection end of the air and water supply channel, and the inner peripheral portion of the female mouthpiece that is held by the male mouthpiece and is operated under the fitting with the female mouthpiece. It is provided with a lock member that engages with and fixes the male mouthpiece.

また、本開示に係る内視鏡は、先端部に連続する送気、送水路と、該送気、送水路に送気、送水装置を接続する雌口金が外表面と面一の開口を有して埋設されたコネクタ部とを備える。 Further, in the endoscope according to the present disclosure, the air supply / water supply channel continuous to the tip portion and the female mouthpiece connecting the air supply / water supply channel to the air supply / water supply device have an opening flush with the outer surface. It is provided with a connector portion embedded therein.

本開示によれば、送気、送水路と送気、送水管とを簡易な操作により確実に接続することができ、使用後の内視鏡の洗浄、消毒作業が容易になる。 According to the present disclosure, the air supply and the water supply channel and the air supply and the water supply pipe can be reliably connected by a simple operation, and the cleaning and disinfection work of the endoscope after use becomes easy.

内視鏡の外観図である。It is an external view of an endoscope. 実施の形態１に係る接続構造を示す断面図である。It is sectional drawing which shows the connection structure which concerns on Embodiment 1. FIG. 雄口金及び回転環の斜視図である。It is a perspective view of a male mouthpiece and a rotating ring. 回転環を保持した雄口金を接続アダプタに取り付けた状態を示す側面図である。It is a side view which shows the state which attached the male mouthpiece holding a rotating ring to a connection adapter. 送気、送水口への接続アダプタの接続手順の説明図である。It is explanatory drawing of the connection procedure of the connection adapter to an air supply and a water supply port. 従来の送気、送水口への接続アダプタの接続状態を示す断面図である。It is sectional drawing which shows the connection state of the connection adapter to the conventional air supply and water supply port. 実施の形態２に係る接続構造の説明図である。It is explanatory drawing of the connection structure which concerns on Embodiment 2. 送気、送水口への接続アダプタの接続手順の説明図である。It is explanatory drawing of the connection procedure of the connection adapter to an air supply and a water supply port.

以下、本開示の実施の形態を図面に基づき説明する。
（実施の形態１）
図１は、内視鏡の外観図である。図示の如く内視鏡１は、挿入部２、操作部３、ライトガイド管４及びコネクタ部５を備えている。挿入部２は、体腔内に挿入される部分であり、長尺の軟性部２０と、該軟性部２０の一端に湾曲部２１を介して連結された先端部２２とを備えている。軟性部２０の他端は、操作部３に連結されている。ライトガイド管４は、操作部３に一端を連結され挿入部２と異なる向きに延びており、コネクタ部５は、ライトガイド管４の他端に連結されている。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is an external view of the endoscope. As shown in the figure, the endoscope 1 includes an insertion portion 2, an operation portion 3, a light guide tube 4, and a connector portion 5. The insertion portion 2 is a portion to be inserted into the body cavity, and includes a long soft portion 20 and a tip portion 22 connected to one end of the soft portion 20 via a curved portion 21. The other end of the flexible portion 20 is connected to the operating portion 3. One end of the light guide tube 4 is connected to the operation portion 3 and extends in a direction different from that of the insertion portion 2, and the connector portion 5 is connected to the other end of the light guide tube 4.

操作部３は、使用者により把持されて各種の操作を行うために設けてあり、湾曲操作ノブ３０、送気、送水ボタン３１及び複数のリモートコントロールボタン３２等を備えている。湾曲操作ノブ３０は、操作部３及び軟性部２０の内部に通したワイヤ（図示せず）により湾曲部２１に連結されている。湾曲部２１は、湾曲操作ノブ３０の操作により、図１中に２点鎖線により示す如く湾曲し、体腔内で先端部２２の向きが変化する。先端部２２には、撮像素子を用いた撮像ユニット（図示せず）及び照明光の出射部が、夫々の窓部に面して組み込まれており、先端部２２の向きを変えることにより、照明光による照明下での撮像箇所を自在に変更することができる。 The operation unit 3 is provided for being gripped by the user to perform various operations, and includes a curved operation knob 30, an air supply / water supply button 31, a plurality of remote control buttons 32, and the like. The bending operation knob 30 is connected to the bending portion 21 by a wire (not shown) passed through the inside of the operating portion 3 and the flexible portion 20. The curved portion 21 is curved as shown by the alternate long and short dash line in FIG. 1 by the operation of the curved operation knob 30, and the direction of the tip portion 22 changes in the body cavity. An image pickup unit (not shown) using an image pickup element and an illumination light emitting portion are incorporated in the tip portion 22 so as to face each window portion, and the tip portion 22 is illuminated by changing the direction of the tip portion 22. The image pickup location under illumination by light can be freely changed.

コネクタ部５は、外部機器との接続のために設けてあり、光源差込部５０、電気コネクタ５１、送気、送水口５２、副送水口５３等を備えている。光源差込部５０及び電気コネクタ５１は、コネクタ部５の端面に同向きに突設されており、照明光の光源を内蔵するプロセッサ装置６に設けた夫々の差込口６０、６１に差し込み接続される。なお、図１中には、プロセッサ装置６の外郭形状が示されている。 The connector portion 5 is provided for connection with an external device, and includes a light source insertion portion 50, an electric connector 51, an air supply, a water supply port 52, a sub water supply port 53, and the like. The light source insertion portion 50 and the electric connector 51 project in the same direction on the end faces of the connector portion 5, and are plugged and connected to the respective outlets 60 and 61 provided in the processor device 6 having the light source of the illumination light. Will be done. Note that FIG. 1 shows the outer shape of the processor device 6.

光源差込部５０は、ライトガイド管４及び操作部３の内部を通り、挿入部２の先端部２２にまで延びる光ファイバの端部を保持しており、該端部は、プロセッサ装置６内の光源（図示せず）に対向する。光源は、キセノンランプ等の高輝度光を発光するランプであり、該光源の発光は、光ファイバにより導光され、挿入部２の先端部２２から出射される。 The light source insertion portion 50 holds an end portion of an optical fiber that passes through the inside of the light guide tube 4 and the operation portion 3 and extends to the tip portion 22 of the insertion portion 2, and the end portion is inside the processor device 6. Facing the light source (not shown). The light source is a lamp that emits high-intensity light such as a xenon lamp, and the light emission of the light source is guided by an optical fiber and emitted from the tip portion 22 of the insertion portion 2.

電気コネクタ５１は、ライトガイド管４の内部を通るケーブル（図示せず）により操作部３に接続され、更に、挿入部２の先端部２２にまで延びるケーブル（図示せず）により、先端部２２に組み込まれた前述した撮像ユニットに接続されている。 The electric connector 51 is connected to the operation portion 3 by a cable (not shown) passing through the inside of the light guide tube 4, and further, the tip portion 22 is connected to the tip portion 22 of the insertion portion 2 by a cable (not shown). It is connected to the above-mentioned imaging unit incorporated in.

送気、送水口５２及び副送水口５３は、コネクタ部５の側面に並設されている。コネクタ部５の内部において、送気、送水口５２には、送気、送水路４０の一端が後述の如く接続され、副送水口５３には、副送水路４１の一端が接続されている。送気、送水路４０及び副送水路４１は、ライトガイド管４、操作部３及び挿入部２の内部を通して先端部２２にまで延設され、夫々の他端は、先端部２２に開口している。図１中には、送気、送水路４０及び副送水路４１を一つにまとめて破線により示してある。 The air supply port, the water supply port 52, and the sub water supply port 53 are arranged side by side on the side surface of the connector portion 5. Inside the connector portion 5, one end of the air supply / water supply channel 40 is connected to the air supply / water supply port 52 as described later, and one end of the sub water supply channel 41 is connected to the sub water supply port 53. The air supply, the water supply channel 40, and the auxiliary water supply channel 41 extend to the tip portion 22 through the inside of the light guide pipe 4, the operation portion 3, and the insertion portion 2, and the other ends of each extend to the tip portion 22. There is. In FIG. 1, the air supply, the water supply channel 40, and the sub water supply channel 41 are grouped together and shown by a broken line.

送気、送水口５２には、送気、送水装置７が接続される。送気、送水装置７は、送水ボトル７０及び加圧ポンプ７１を備える。送水ボトル７０は、適量の滅菌水を入れ、キャップ７２により気密に封止して使用される。キャップ７２の中央部には、送気、送水管７３の一端が接続されている。送気、送水管７３は、送水ボトル７０内で滅菌水の水面下に開口する送水チューブと、送水ボトル７０の上部空間に開口する送気チューブとを備えており、他端に設けた接続プラグ７４により、コネクタ部５の送気、送水口５２に後述する接続アダプタ１０を介して接続される。 An air supply / water supply device 7 is connected to the air supply / water supply port 52. The air supply / water supply device 7 includes a water supply bottle 70 and a pressure pump 71. The water supply bottle 70 is used by filling an appropriate amount of sterilized water and hermetically sealing it with a cap 72. One end of an air supply / water supply pipe 73 is connected to the central portion of the cap 72. The air supply / water supply pipe 73 includes a water supply tube that opens below the surface of the sterilized water in the water supply bottle 70 and an air supply tube that opens in the upper space of the water supply bottle 70, and is provided at the other end of the connection plug. The 74 connects the air supply port 52 of the connector portion 5 to the water supply port 52 via a connection adapter 10 described later.

図１中に模式的に示す加圧ポンプ７１は、キャップ７２の側面に突設されたノズル７５に接続され、該ノズル７５を介して送水ボトル７０の上部空間に加圧空気を送り込むように構成されている。加圧ポンプ７１が駆動された場合、送水ボトル７０内の滅菌水は、加圧空気の作用により送水チューブを経て送気、送水管７３に送り出され、送水ボトル７０上部の空気は、送気チューブを経て送気、送水管７３に送り出される。 The pressurizing pump 71 schematically shown in FIG. 1 is connected to a nozzle 75 projecting from the side surface of the cap 72, and is configured to send pressurized air into the upper space of the water supply bottle 70 through the nozzle 75. Has been done. When the pressure pump 71 is driven, the sterilized water in the water supply bottle 70 is supplied to the water supply pipe 73 via the water supply tube by the action of the pressurized air, and the air above the water supply bottle 70 is sent to the air supply tube. Air is sent to the water pipe 73.

加圧ポンプ７１は、プロセッサ装置６の内部に設け、送水ボトル７０は、プロセッサ装置６の筐体側面に設けた接続口にノズル７５を差し込むことで加圧ポンプ７１に接続される構成とすることができる。この構成によれば、送水ボトル７０は、プロセッサ装置６を支持体として安定して支持され、送水ボトル７０の送気、送水管７３は、光源差込部５０及び電気コネクタ５１によりプロセッサ装置６に接続されるコネクタ部５の送気、送水口５２に容易に接続することができる。 The pressurizing pump 71 is provided inside the processor device 6, and the water supply bottle 70 is connected to the pressurizing pump 71 by inserting a nozzle 75 into a connection port provided on the side surface of the housing of the processor device 6. Can be done. According to this configuration, the water supply bottle 70 is stably supported by the processor device 6 as a support, and the air supply and water pipe 73 of the water supply bottle 70 are connected to the processor device 6 by the light source insertion unit 50 and the electric connector 51. It can be easily connected to the air supply and water supply ports 52 of the connector portion 5 to be connected.

図２は、実施の形態１に係る接続構造を示す断面図である。送気、送水口５２は、コネクタ部５の側壁を貫通する貫通孔に雌口金８を埋設して構成されている。雌口金８は、一側の内径を小、他側の内径を大とした円筒体であり、大径側の開口をコネクタ部５の外表面と面一に揃えて埋設されている。雌口金８の大径側開口部には、内向きに張り出す鍔状の係合部８０が周設されている。雌口金８の小径側開口部は、底板８１により気密に覆われている。底板８１の中央部には、雌口金８の内部に向けて通水筒８２が同軸的に突設され、通水筒８２の周囲には、厚さ方向に貫通する通気孔８３が形成されている。通水筒８２の外周にはシール用のＯリング８４が巻装されている。通水筒８２及び通気孔８３には、コネクタ部５の内部で、前述した送気、送水路４０の端部が接続されている。 FIG. 2 is a cross-sectional view showing a connection structure according to the first embodiment. The air supply and water supply ports 52 are configured by embedding a female mouthpiece 8 in a through hole penetrating the side wall of the connector portion 5. The female mouthpiece 8 is a cylindrical body having a small inner diameter on one side and a large inner diameter on the other side, and is embedded so that the opening on the large diameter side is flush with the outer surface of the connector portion 5. A collar-shaped engaging portion 80 projecting inward is provided around the large-diameter opening of the female mouthpiece 8. The small diameter side opening of the female mouthpiece 8 is airtightly covered with a bottom plate 81. A water bottle 82 is coaxially projected from the center of the bottom plate 81 toward the inside of the female mouthpiece 8, and a ventilation hole 83 penetrating in the thickness direction is formed around the water bottle 82. An O-ring 84 for sealing is wound around the outer circumference of the water bottle 82. The ends of the above-mentioned air supply and water supply passages 40 are connected to the water flow cylinder 82 and the ventilation hole 83 inside the connector portion 5.

以上の如き送気、送水口５２には、送気、送水装置７から延びる送気、送水管７３が、接続アダプタ１０を介して接続される。接続アダプタ１０は、円筒状をなし、一側端部には、送気、送水管７３の端部に設けた接続プラグ７４を接続するための接続口１１（第１接続口）が設けられている。接続口１１の構成は、コネクタ部５に設けられた送気、送水口５２と同様である。 An air supply / water supply pipe 73 extending from the water supply / water supply device 7 is connected to the air supply / water supply port 52 as described above via the connection adapter 10. The connection adapter 10 has a cylindrical shape, and a connection port 11 (first connection port) for connecting a connection plug 74 provided at an end of an air supply / water supply pipe 73 is provided at one end. There is. The configuration of the connection port 11 is the same as that of the air supply and water supply ports 52 provided in the connector portion 5.

接続アダプタ１０の外周面には、炭酸ガス（ＣＯ₂ガス）の導入ノズル１２（第２接続口）が突設されている。導入ノズル１２には、接続アダプタ１０の内部に連通するガス通路１３が形成され、ガス通路１３には、接続アダプタ１０に向かう内向きの通気を許容する逆止弁１４が設けてある。導入ノズル１２の端部には、炭酸ガスボンベが接続される。炭酸ガスボンベ内の炭酸ガスは、ガス通路１３及び逆止弁１４を介して接続アダプタ１０の内部に導入される。 A carbon dioxide gas (CO ₂ gas) introduction nozzle 12 (second connection port) is projected from the outer peripheral surface of the connection adapter 10. The introduction nozzle 12 is formed with a gas passage 13 communicating with the inside of the connection adapter 10, and the gas passage 13 is provided with a check valve 14 that allows inward ventilation toward the connection adapter 10. A carbon dioxide gas cylinder is connected to the end of the introduction nozzle 12. The carbon dioxide gas in the carbon dioxide gas cylinder is introduced into the connection adapter 10 via the gas passage 13 and the check valve 14.

接続アダプタ１０の他側端部には、有底円筒状をなす雄口金９の開口側端部が同軸をなして螺合固定されている。接続アダプタ１０と雄口金９との間には、仕切り板１５が挟持されている。仕切り板１５の中央部には、接続アダプタ１０の内部に向けて通水筒１６が同軸的に突設され、通水筒１６の周囲には、厚さ方向に貫通する通気孔１７が形成されている。通水筒１６の外周にはシール用のＯリング１８が巻装されている。 At the other end of the connection adapter 10, the open end of the male mouthpiece 9 having a bottomed cylindrical shape is coaxially screwed and fixed. A partition plate 15 is sandwiched between the connection adapter 10 and the male mouthpiece 9. A water bottle 16 is coaxially projected toward the inside of the connection adapter 10 at the center of the partition plate 15, and a ventilation hole 17 penetrating in the thickness direction is formed around the water bottle 16. .. An O-ring 18 for sealing is wound around the outer circumference of the water bottle 16.

雄口金９の底部には、通水筒９０が同軸的に保持され、通水筒９０の周囲には、底部を厚さ方向に貫通する通気孔９１が形成されている。通水筒９０は、内側及び外側に延びており、内側への延設端は、接続アダプタ１０との接続により通水筒１６と液密に連続するように構成してある。通水筒９０の外側への延設端部は、拡径され、雌口金８の通水筒８２への外嵌接続を可能とした接続部９２が設けられている。雄口金９の底部側端部は、雌口金８の小径部に内嵌可能な外径を有しており、該端部には、シール用のＯリング９３が巻装されている。 A water bottle 90 is coaxially held at the bottom of the male mouthpiece 9, and a ventilation hole 91 that penetrates the bottom in the thickness direction is formed around the water bottle 90. The water bottle 90 extends inward and outward, and the extending end inward is configured to be liquidtightly continuous with the water bottle 16 by connecting with the connection adapter 10. The extension end of the water bottle 90 to the outside is expanded in diameter, and a connecting portion 92 is provided so that the female mouthpiece 8 can be externally connected to the water bottle 82. The bottom side end of the male mouthpiece 9 has an outer diameter that can be fitted into the small diameter portion of the female mouthpiece 8, and an O-ring 93 for sealing is wound around the end portion.

雄口金９の開口側には、保持筒９４が設けてあり、該保持筒９４に回転環１００が外嵌保持されている。図３は、雄口金９及び回転環１００の斜視図である。保持筒９４は、雄口金９の軸心に対して偏心した外周を有し、肉厚が周方向に連続して変化する周壁を有する偏心円筒であり、該保持筒９４には、規制溝９５が形成されている。規制溝９５は、半円形の断面を有しており、保持筒９４の外周面に、軸長方向の中央部で薄肉部分（図の手前側）から厚肉部分（図の奥側）までの略半周に亘って延び、厚肉側の端部で軸長方向に立ち上げられ、端面に連続するように形成されている。図５中には、端面への連続部が示されている。なお図３中の９３ａは、Ｏリング９３を保持するＯリング溝である。 A holding cylinder 94 is provided on the opening side of the male mouthpiece 9, and the rotating ring 100 is externally fitted and held in the holding cylinder 94. FIG. 3 is a perspective view of the male mouthpiece 9 and the rotating ring 100. The holding cylinder 94 is an eccentric cylinder having an outer circumference eccentric with respect to the axial center of the male mouthpiece 9 and having a peripheral wall whose wall thickness continuously changes in the circumferential direction. The holding cylinder 94 has a regulation groove 95. Is formed. The regulation groove 95 has a semicircular cross section, and is formed on the outer peripheral surface of the holding cylinder 94 from a thin portion (front side in the figure) to a thick portion (back side in the figure) at the central portion in the axial length direction. It extends over approximately half the circumference, is raised in the axial length direction at the end on the thick wall side, and is formed so as to be continuous with the end face. In FIG. 5, a continuous portion to the end face is shown. Reference numeral 93a in FIG. 3 is an O-ring groove for holding the O-ring 93.

回転環１００は、相互に偏心した内、外周を有し、肉厚が周方向に連続して変化する周壁を有する偏心円筒であり、一側の端部には、外向きに張り出す鍔状の操作部１０１が周設されている。回転環１００の偏心量は、保持筒９４の偏心量と等しくしてあり、回転環１００の内径は、保持筒９４の外径と同じである。回転環１００の周壁には、内、外に貫通する窓孔１０２が形成されている。窓孔１０２は、一辺を操作部１０１に沿わせた矩形孔であり、厚肉部分（図の手前側）の中央から周方向両側に略半周に亘って延びている。回転環１００の内面には、薄肉部分（図の奥側）の中央位置に半球状の規制突起１０３が突設されている The rotating ring 100 is an eccentric cylinder having inner and outer circumferences that are eccentric to each other and having a peripheral wall whose wall thickness continuously changes in the circumferential direction, and has a brim shape that projects outward at one end. The operation unit 101 of the above is provided around the circumference. The amount of eccentricity of the rotating ring 100 is equal to the amount of eccentricity of the holding cylinder 94, and the inner diameter of the rotating ring 100 is the same as the outer diameter of the holding cylinder 94. A window hole 102 that penetrates inside and outside is formed on the peripheral wall of the rotating ring 100. The window hole 102 is a rectangular hole having one side along the operation unit 101, and extends from the center of the thick portion (front side in the drawing) to both sides in the circumferential direction over substantially half a circumference. On the inner surface of the rotating ring 100, a hemispherical regulation protrusion 103 is projected at the center position of the thin portion (back side in the drawing).

このように構成された回転環１００は、保持筒９４に対し、該保持筒９４の端面への規制溝９５の連続部に規制突起１０３が一致するように周方向に位置合わせし、図３中に矢符により示すように、規制溝９５に規制突起１０３を係合させながら保持筒９４に嵌め合わせて雄口金９に保持される。図４は、回転環１００を保持した雄口金９を接続アダプタ１０に取り付けた状態を示す側面図である。 The rotary ring 100 configured in this way is aligned with respect to the holding cylinder 94 in the circumferential direction so that the regulating projection 103 coincides with the continuous portion of the regulating groove 95 to the end surface of the holding cylinder 94, and is shown in FIG. As shown by an arrow, the regulation protrusion 103 is fitted into the holding cylinder 94 while being engaged with the regulation groove 95, and is held by the male mouthpiece 9. FIG. 4 is a side view showing a state in which the male mouthpiece 9 holding the rotating ring 100 is attached to the connection adapter 10.

規制溝９５は、保持筒９４の厚肉部分で端面に連続しており、規制突起１０３は、回転環１００の薄肉部分の内周に形成されている。また、保持筒９４及び回転環１００の偏心量は等しい。従って、前述の如く保持された回転環１００の外周は、図４に示す如く、雄口金９と同軸となり、保持筒９４に連続する大径部の外周と略一致する。このように保持された回転環１００は、操作部１０１を把持して回転操作することができる。操作部１０１の外面には、図４に示すように、滑り止めのためのローレット目が形成されている。 The regulation groove 95 is a thick portion of the holding cylinder 94 and is continuous with the end face, and the regulation protrusion 103 is formed on the inner circumference of the thin portion of the rotary ring 100. Further, the eccentricities of the holding cylinder 94 and the rotating ring 100 are equal. Therefore, as shown in FIG. 4, the outer circumference of the rotating ring 100 held as described above is coaxial with the male mouthpiece 9 and substantially coincides with the outer circumference of the large diameter portion continuous with the holding cylinder 94. The rotating ring 100 held in this way can grip the operation unit 101 and rotate it. As shown in FIG. 4, knurled eyes are formed on the outer surface of the operation unit 101 to prevent slipping.

接続アダプタ１０は、回転環１００を保持する雄口金９を、図２中に矢符により示すように、送気、送水口５２を形成する雌口金８に嵌め合わせることで接続される。図５は、送気、送水口５２への接続アダプタ１０の接続手順の説明図である。保持筒９４の大径部は、雌口金８の開口部に設けた係合部８０に嵌め合わせ可能な外径を有しており、図５Ａに示す如く、雄口金９は、回転環１００と共に雌口金８に嵌め合わされる。 The connection adapter 10 is connected by fitting the male mouthpiece 9 holding the rotating ring 100 to the female mouthpiece 8 forming the air supply and water supply ports 52, as shown by arrows in FIG. FIG. 5 is an explanatory diagram of a procedure for connecting the connection adapter 10 to the air supply / water supply port 52. The large diameter portion of the holding cylinder 94 has an outer diameter that can be fitted to the engaging portion 80 provided in the opening of the female cap 8, and as shown in FIG. 5A, the male cap 9 is combined with the rotating ring 100. It is fitted to the female mouthpiece 8.

図５Ｂは、嵌め合わせの後、回転環１００を半回転させた状態を示している。回転環１００は、保持筒９４を支持体として生じ、該保持筒９４は、前述したように雄口金９の軸心に対して偏心回転し、半回転後の回転位置においては、回転環１００の厚肉部分が保持筒９４の厚肉部分に重なる。厚肉部分は、図５Ｂに示すように、保持筒９４及び回転環１００夫々の偏心量δの２倍分だけ外側に張り出し、厚肉部分を中心として回転環１００の周壁に形成された窓孔１０２の縁部が、雌口金８の開口部の内周縁から内向きに張り出す係合部８０に係合する。この係合により雄口金９は、雌口金８に抜け止め固定され、接続アダプタ１０は、送気、送水口５２に強固に接続される。回転環１００は、雄口金９を抜け止め固定するロック部材として機能する。 FIG. 5B shows a state in which the rotary ring 100 is rotated half a turn after fitting. The rotary ring 100 is generated with the holding cylinder 94 as a support, and the holding cylinder 94 rotates eccentrically with respect to the axial center of the male mouthpiece 9 as described above, and at the rotation position after half a rotation, the rotary ring 100 The thick portion overlaps the thick portion of the holding cylinder 94. As shown in FIG. 5B, the thick portion projects outward by twice the eccentricity δ of each of the holding cylinder 94 and the rotating ring 100, and a window hole formed in the peripheral wall of the rotating ring 100 centering on the thick portion. The edge of 102 engages the engaging portion 80 that projects inward from the inner peripheral edge of the opening of the female mouthpiece 8. By this engagement, the male mouthpiece 9 is fixed to the female mouthpiece 8 so as not to come off, and the connection adapter 10 is firmly connected to the air supply and water supply ports 52. The rotary ring 100 functions as a lock member for retaining and fixing the male mouthpiece 9.

送気、送水装置７から延びる送気、送水管７３の接続プラグ７４は、雄口金９と同様の口金を備えており、送気、送水管７３は、前述の如く送気、送水口５２と同様の構成を有する接続アダプタ１０の接続口１１に同様の手順で接続される。送気、送水管７３は、コネクタ部５の送気、送水口５２に直接接続することもできる。 The connection plug 74 of the air supply / water supply pipe 73 extending from the air supply / water supply device 7 has a base similar to that of the male mouthpiece 9, and the air supply / water pipe 73 has the air supply / water supply port 52 as described above. It is connected to the connection port 11 of the connection adapter 10 having the same configuration by the same procedure. The air supply / water supply pipe 73 can also be directly connected to the air supply / water supply port 52 of the connector portion 5.

以上の接続により、雌口金８の内部では、雄口金９の通水筒９０に設けた接続部９２が通水筒８２に外嵌され、通水筒８２と通水筒９０とは、Ｏリング８４による水密を保って連通する。接続アダプタ１０内部の通水筒１６は、接続プラグ７４から延びる通水筒にＯリング１８による水密を保って連通する。これにより、接続アダプタ１０の内部には、通水筒１６、９０、８２による通水路が形成され、該通水路の外側には、通気孔１７、９１、８３により相互に連通する環状の通気路が形成される。 With the above connection, inside the female mouthpiece 8, the connecting portion 92 provided in the water bottle 90 of the male mouthpiece 9 is fitted onto the water bottle 82, and the water bottle 82 and the water bottle 90 are watertightened by the O-ring 84. Keep and communicate. The water bottle 16 inside the connection adapter 10 communicates with the water bottle extending from the connection plug 74 while maintaining watertightness by the O-ring 18. As a result, a water passage by the water pipes 16, 90, 82 is formed inside the connection adapter 10, and an annular ventilation passage communicating with each other by the ventilation holes 17, 91, 83 is formed outside the water passage. It is formed.

送気、送水管７３からの送気、送水は、以上のような通気路及び通水路を通ってコネクタ部５内の送気、送水路４０に送り込まれ、挿入部２の先端部２２から送り出される。送気は、例えば、上部消化管用の内視鏡１において、挿入部２の挿入時に狭い管腔を膨らませるために実施される。送水は、先端部２２に設けられた撮像、照明用の窓、又は観察箇所を洗浄するために実施される。送気、送水は、操作部３に設けた送気、送水ボタン３１の操作により、遮断を含めて切換えられる。 The air supply, the air supply from the water supply pipe 73, and the water supply are sent to the air supply and the water supply passage 40 in the connector portion 5 through the ventilation passage and the water passage as described above, and are sent out from the tip portion 22 of the insertion portion 2. Is done. The insufflation is performed, for example, in the endoscope 1 for the upper gastrointestinal tract in order to inflate a narrow lumen when the insertion portion 2 is inserted. Water supply is performed to clean the imaging, lighting window, or observation point provided at the tip 22. Air supply and water supply can be switched including shutoff by operating the air supply and water supply buttons 31 provided in the operation unit 3.

接続アダプタ１０に突設された導入ノズル１２は、接続アダプタ１０内の通気路に連通しており、導入ノズル１２から導入される炭酸ガスは、送気、送水路４０に送り込まれ、挿入部２の先端部２２から送り出される。炭酸ガスの送気は、例えば、下部消化管用の内視鏡１において、管腔内部に滞留する可燃性ガスを不燃性の炭酸ガスに置換するために実施される。炭酸ガスの送気も、送気、送水ボタン３１の操作により通断される。 The introduction nozzle 12 projecting from the connection adapter 10 communicates with the ventilation passage in the connection adapter 10, and the carbon dioxide gas introduced from the introduction nozzle 12 is sent to the air supply and water supply passages 40, and the insertion portion 2 It is sent out from the tip portion 22 of the. The carbon dioxide gas supply is performed, for example, in the endoscope 1 for the lower gastrointestinal tract in order to replace the flammable gas staying inside the lumen with a nonflammable carbon dioxide gas. The carbon dioxide gas supply is also cut off by operating the air supply and water supply buttons 31.

以上の接続構造において、雄口金９は、雌口金８への嵌め合わせの後、回転環１００を偏心軸周りに半回転させる簡易な操作で抜け止め固定される。回転環１００の回転は、規制溝９５及び規制突起１０３の作用により、係合位置と非係合位置とで規制されるから、雄口金９の固定及び固定解除は、雌口金８への嵌め合わせ下での操作により確実に行わせることができる。雄口金９は、回転環１００の窓孔１０２が、雌口金８の開口部周縁の鍔状の係合部８０に係合することで固定されている。この固定は、内視鏡１の使用時に接続アダプタ１０に外力が加わった場合においても維持され、また炭酸ガスの使用時に高い内圧が加わった場合にも維持される。 In the above connection structure, the male mouthpiece 9 is fixed by a simple operation of rotating the rotating ring 100 half a turn around the eccentric axis after fitting to the female mouthpiece 8. Since the rotation of the rotary ring 100 is restricted between the engaged position and the non-engaged position by the action of the regulating groove 95 and the regulating protrusion 103, the male mouthpiece 9 is fixed and released by fitting to the female mouthpiece 8. It can be surely done by the operation below. The male mouthpiece 9 is fixed by engaging the window hole 102 of the rotary ring 100 with the collar-shaped engaging portion 80 on the periphery of the opening of the female mouthpiece 8. This fixation is maintained even when an external force is applied to the connection adapter 10 when using the endoscope 1, and is also maintained when a high internal pressure is applied when using carbon dioxide gas.

回転環１００は、雌口金８の内周部に係合してロック部材として機能するから、雌口金８は、図２に示すように、内視鏡１のコネクタ部５に外表面と面一の開口を有して埋設することができる。従って、内視鏡１の使用後の洗浄、消毒作業中に、内視鏡１の他部、特に、挿入部２に含まれる軟性部２０が雌口金８との衝突により傷付く虞を軽減することができる。雌口金８は、外表面から段落ちした開口を有してコネクタ部５に埋設することもできる。 Since the rotary ring 100 engages with the inner peripheral portion of the female mouthpiece 8 and functions as a lock member, the female mouthpiece 8 is flush with the outer surface of the connector portion 5 of the endoscope 1 as shown in FIG. It can be buried with an opening. Therefore, during cleaning and disinfection work after using the endoscope 1, the possibility that the other part of the endoscope 1, particularly the soft part 20 included in the insertion part 2, is damaged by the collision with the female mouthpiece 8 is reduced. be able to. The female mouthpiece 8 may have an opening stepped down from the outer surface and may be embedded in the connector portion 5.

接続アダプタ１０は、従来の送気、送水口５２に接続することもできる。図６は、従来の送気、送水口５２への接続アダプタ１０の接続状態を示す断面図である。図示の送気、送水口５２は、コネクタ部５の側壁を貫通する貫通孔に、該側壁から一部を突出させて固設された雌口金８を備えている。雌口金８の突出端部の外周には、押えナットを螺合するためのねじ部８５が形成されている。 The connection adapter 10 can also be connected to the conventional air supply / water supply port 52. FIG. 6 is a cross-sectional view showing a connection state of the connection adapter 10 to the conventional air supply / water supply port 52. The illustrated air supply and water supply ports 52 are provided with a female mouthpiece 8 which is fixed in a through hole penetrating the side wall of the connector portion 5 with a part protruding from the side wall. A screw portion 85 for screwing the presser nut is formed on the outer periphery of the protruding end portion of the female mouthpiece 8.

接続アダプタ１０は、雄口金９を雌口金８に図示の如く嵌め合わせ、回転環１００を偏心軸周りに半回転させる簡易な操作により送気、送水口５２に接続される。図６中には、接続後に接続アダプタ１０、雄口金９及び雌口金８により形成される通気路及び通水路を破線により示してある。 The connection adapter 10 is connected to the air supply and water supply ports 52 by a simple operation in which the male mouthpiece 9 is fitted to the female mouthpiece 8 as shown and the rotary ring 100 is rotated half a turn around the eccentric axis. In FIG. 6, the ventilation passage and the water passage formed by the connection adapter 10, the male mouthpiece 9 and the female mouthpiece 8 after connection are shown by broken lines.

（実施の形態２）
図７は、実施の形態２に係る接続構造の説明図である。本図は、図４と同様、雄口金９を接続アダプタ１０に取り付けた状態を示す側面図である。図８は、送気、送水口５２への接続アダプタ１０の接続手順の説明図である。以下の説明において、実施の形態１と同様の構成については、実施の形態１と同一の参照符号を付して説明を省略する。 (Embodiment 2)
FIG. 7 is an explanatory diagram of the connection structure according to the second embodiment. This figure is a side view showing a state in which the male mouthpiece 9 is attached to the connection adapter 10 as in FIG. FIG. 8 is an explanatory diagram of a procedure for connecting the connection adapter 10 to the air supply / water supply port 52. In the following description, the same configurations as those in the first embodiment will be designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

実施の形態２において、雄口金９には、止め輪２００と移動環３００とが保持されている。止め輪２００は、周方向の一部を欠落させた円環、所謂、Ｃ形止め輪であり、雄口金９の保持筒９６の先端部側に適宜の隙間を隔てて外嵌保持されている。保持筒９６は、実施の形態１の保持筒９４とは異なり、雄口金９の他部と同軸である。 In the second embodiment, the retaining ring 200 and the moving ring 300 are held by the male mouthpiece 9. The retaining ring 200 is a so-called C-shaped retaining ring having a part missing in the circumferential direction, and is externally fitted and held on the tip end side of the holding cylinder 96 of the male mouthpiece 9 with an appropriate gap. .. Unlike the holding cylinder 94 of the first embodiment, the holding cylinder 96 is coaxial with the other portion of the male mouthpiece 9.

移動環３００は、薄肉の円筒体であり、止め輪２００よりも基部側で雄口金９の保持筒９６に軸長方向への移動自在に保持されている。移動環３００の基端側には、拡径により外向きに張り出す鍔状の操作部３０１が連設されており。該操作部３０１の内周に設けた雌ねじ部が、雄口金９の対応位置の外周に設けた雄ねじ部に螺合させてある。移動環３００は、操作部３１０を把持して回転操作することによりにより軸長方向に螺進移動する。操作部３０１の外周面には、回転操作時の滑り止めのためのローレット目が形成されている。 The moving ring 300 is a thin cylindrical body, and is held on the base side of the retaining ring 200 by the holding cylinder 96 of the male mouthpiece 9 so as to be movable in the axial length direction. On the base end side of the moving ring 300, a collar-shaped operating portion 301 that projects outward due to the diameter expansion is continuously provided. The female screw portion provided on the inner circumference of the operation portion 301 is screwed into the male screw portion provided on the outer circumference of the corresponding position of the male mouthpiece 9. The moving ring 300 is spirally moved in the axial length direction by grasping the operation unit 310 and rotating it. A knurled eye is formed on the outer peripheral surface of the operation unit 301 to prevent slipping during a rotation operation.

以上のような雄口金９は、図８Ａに示すように、移動環３００を止め輪２００から離して位置させておき、雌口金８に嵌め合わせる。このとき止め輪２００は、雌口金８の開口部に設けた係合部８０により内向きに押され、切欠き部の幅を縮めることで保持筒９６との間の隙間の範囲内で縮径し雌口金８の内部に入り込み、弾性復帰により拡径して、図８Ａに示すように係合部８０に係合する。止め輪２００の外面は、係合部８０の作用による縮径を補助するために、円弧形の凸形状を有している。 As shown in FIG. 8A, the male mouthpiece 9 as described above is fitted to the female mouthpiece 8 with the moving ring 300 positioned away from the retaining ring 200. At this time, the retaining ring 200 is pushed inward by the engaging portion 80 provided in the opening of the female mouthpiece 8, and the width of the notch portion is reduced to reduce the diameter within the range of the gap between the retaining ring 200 and the holding cylinder 96. It enters the inside of the female mouthpiece 8 and expands its diameter by elastic recovery, and engages with the engaging portion 80 as shown in FIG. 8A. The outer surface of the retaining ring 200 has an arcuate convex shape in order to assist the diameter reduction due to the action of the engaging portion 80.

以上の嵌め合わせを完了した後、移動環３００を回転操作し、止め輪２００に向けて移動させる。移動環３００の先端部は、図８Ｂに示すように、拡径した止め輪２００と保持筒９６との間の隙間に入り込み、止め輪２００を拡径方向に付勢する。これにより止め輪２００の縮径が規制され、係合部８０との係合を保つから、雄口金９は、強固に抜け止め固定され、この固定は、内視鏡１の使用時に接続アダプタ１０に外力が加わった場合、また炭酸ガスの使用時に高い内圧が加わった場合にも維持される。 After completing the above fitting, the moving ring 300 is rotated and moved toward the stop ring 200. As shown in FIG. 8B, the tip of the moving ring 300 enters the gap between the enlarged diameter retaining ring 200 and the holding cylinder 96, and urges the retaining ring 200 in the diameter increasing direction. As a result, the diameter of the retaining ring 200 is regulated and the engagement with the engaging portion 80 is maintained. Therefore, the male mouthpiece 9 is firmly fixed to prevent it from coming off, and this fixing is performed by the connection adapter 10 when using the endoscope 1. It is maintained even when an external force is applied to the surface and when a high internal pressure is applied when using carbon dioxide gas.

移動環３００は、雄口金９に螺合せず、軸長方向に押し引きすることにより移動させる構成としてもよい。実施の形態２においては、止め輪２００及び移動環３００がロック部材として機能する。 The moving ring 300 may be configured to be moved by pushing and pulling in the axial length direction without being screwed into the male mouthpiece 9. In the second embodiment, the retaining ring 200 and the moving ring 300 function as lock members.

なお、今回開示された実施の形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した意味ではなく、特許請求の範囲によって示され、特許請求の範囲と均等な意味および範囲内でのすべての変更が含まれることが意図される。 It should be noted that the embodiments disclosed this time are exemplary in all respects and are not considered to be restrictive. The scope of the present invention is indicated by the scope of claims, not the above-mentioned meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

１内視鏡
５コネクタ部
７送気、送水装置
８雌口金
９雄口金
１０接続アダプタ
１１接続口（第１接続口）
１２導入ノズル（第２接続口）
４０送気、送水路
７３送気、送水管
９５規制溝（規制部）
１００回転環（ロック部材）
１０３規制突起（規制部）
２００止め輪（ロック部材）
３００移動環（ロック部材） 1 Endoscope 5 Connector part 7 Air supply and water supply device 8 Female base 9 Male base 10 Connection adapter 11 Connection port (1st connection port)
12 Introductory nozzle (second connection port)
40 Air supply, water supply channel 73 Air supply, water pipe 95 Regulation groove (regulation section)
100 rotary ring (lock member)
103 Regulatory protrusion (regulatory part)
200 Retaining ring (lock member)
300 Moving ring (lock member)

Claims

In a connection structure that connects the air supply that is continuous to the tip of the endoscope, the air supply that extends from the water supply device, and the water supply pipe to the water supply channel.
Cylindrical female mouthpiece provided at the connection end of the air supply and water supply channels,
A cylindrical male mouthpiece provided at the connection end of the air supply and water supply pipes and fitted and connected to the female mouthpiece, and
A connection structure including a lock member that is held by the male mouthpiece and engages with the inner peripheral portion of the female mouthpiece by operation while being fitted with the female mouthpiece to prevent and fix the male mouthpiece.

The lock member is
The connection structure according to claim 1, further comprising a rotating ring that is rotatably held on the male mouthpiece about an eccentric axis and engages with the female mouthpiece at a predetermined rotation position.

The connection structure according to claim 2, further comprising a regulating portion that regulates the rotation of the rotating ring at an engaged position and a non-engaged position with the female mouthpiece, respectively.

The lock member is
A retaining ring that is externally held by the male mouthpiece, elastically expands in diameter under fitting with the female mouthpiece, and engages with the female mouthpiece.
The connection structure according to claim 1, further comprising a moving ring that is fitted and held on the male mouthpiece so as to be movable in the axial length direction and that urges the retaining ring in the diameter-expanding direction at a predetermined moving position.

The connection structure according to claim 4, wherein the moving ring is screwed into a threaded portion formed on the outer circumference of the male mouthpiece, and is screwed and moved in the axial length direction by a rotation operation.

In the connection adapter that connects the air supply of the endoscope, the air supply to the water supply channel, and the water supply device
The first connection port to which the air supply, the air supply extending from the water supply device, and the water supply pipe are connected, and
The second connection port to which the carbon dioxide gas cylinder is connected,
Ventilation and water passages that are continuous to the first connection port and the second connection port,
A male mouthpiece provided at the end of the ventilation and water passage and fitted and connected to a female mouthpiece provided at the connection end of the air supply and water supply passages.
A connection adapter including a lock member that is held by the male mouthpiece and engages with the inner peripheral portion of the female mouthpiece by an operation while being fitted with the female mouthpiece to prevent and fix the male mouthpiece.

Continuous air supply and water supply channel at the tip,
An endoscope comprising a connector portion in which a female mouthpiece for connecting an air supply / water supply device to the air supply / water supply channel has a flush opening with an outer surface and is embedded.