JP5771507B2 - Endoscope cap and endoscope unit - Google Patents

Endoscope cap and endoscope unit Download PDF

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JP5771507B2
JP5771507B2 JP2011245640A JP2011245640A JP5771507B2 JP 5771507 B2 JP5771507 B2 JP 5771507B2 JP 2011245640 A JP2011245640 A JP 2011245640A JP 2011245640 A JP2011245640 A JP 2011245640A JP 5771507 B2 JP5771507 B2 JP 5771507B2
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distal end
insertion portion
endoscope
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cap
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JP2013099466A (en
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朋子 島田
朋子 島田
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Olympus Corp
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本発明は、内視鏡の挿入部先端に装着される内視鏡用キャップ及びこの内視鏡用キャップと内視鏡とを備えた内視鏡ユニットに関するものである。   The present invention relates to an endoscope cap that is attached to the distal end of an insertion portion of an endoscope, and an endoscope unit that includes the endoscope cap and an endoscope.

一般に、内視鏡の挿入部は、撮像光学系、照明光学系、洗浄用の流体や空気を供給するノズル及び鉗子やプローブ等の処置用器具を導出させるチャンネル等を備えている。挿入部を体腔内に挿入して被検体の患部を鏡観する際に、粘液や血液により視野が悪化して観察を妨げるような場合には、挿入部のノズルから患部近傍に洗浄用の水を給水し、その水圧により患部等を洗浄している（例えば、特許文献１参照）。   In general, an insertion portion of an endoscope includes an imaging optical system, an illumination optical system, a nozzle that supplies a cleaning fluid or air, and a channel that guides a treatment instrument such as a forceps or a probe. When the insertion part is inserted into the body cavity and the affected part of the subject is viewed in a mirror, if the visual field deteriorates due to mucus or blood and obstructs the observation, water for washing is placed near the affected part from the nozzle of the insertion part. And the affected part is washed by the water pressure (see, for example, Patent Document 1).

特開２００５−１９２６３８号公報JP 2005-192638 A

しかしながら、従来の内視鏡では、例えば、消化管等患部周辺の体腔が狭い場合には、洗浄により体腔内に液体が溜まり観察を妨げることとなるので、液体を排水する必要がある。そこで、排液のために挿入部に排液用の管を設けることも考えられるが、このような場合には挿入部が大径化するので好ましくない。特に、所謂細径の走査型内視鏡では、通常の内視鏡と比較した場合、挿入部内部に照明用のファイバを駆動させるための駆動部とファイバを光軸方向に駆動させるための空間とを確保する必要があることから、排液用のチャネルを設けることは困難である。
本発明は、上述した事情に鑑みてなされたものであって、挿入部を大径化することなく被検体や挿入部の汚れを除去し視野をクリアにすることができる内視鏡用キャップ及び内視鏡ユニットを提供することを目的とする。 However, in a conventional endoscope, for example, when the body cavity around the affected part such as the digestive tract is narrow, the liquid accumulates in the body cavity due to washing and obstructs observation, so it is necessary to drain the liquid. Therefore, it is conceivable to provide a drainage pipe at the insertion portion for drainage. However, in such a case, the insertion portion is undesirably large in diameter. In particular, in a so-called small-diameter scanning endoscope, when compared with a normal endoscope, a drive unit for driving an illumination fiber in the insertion unit and a space for driving the fiber in the optical axis direction Therefore, it is difficult to provide a drainage channel.
The present invention has been made in view of the above-described circumstances, and is an endoscope cap that can remove the contamination of the subject and the insertion portion without enlarging the insertion portion and can clear the visual field. An object is to provide an endoscope unit.

上記目的を達成するため、本発明は以下の手段を提供する。
本発明は、先端と基端とが開口した筒状のキャップ本体と、該キャップ本体の基端側に設けられ、内視鏡の送水用チャンネルを有する挿入部先端に装着される装着部と、前記キャップ本体の先端側に設けられ、前記装着部を内視鏡挿入部先端に装着して前記キャップ本体の先端を被検体に接触させたときに、前記挿入部先端と被検体との間隔を一定に保持して前記被検体を観察するための空間を形成するフード部と、前記装着部又は前記フード部に設けられ、該フード部によって形成される空間内の流体を排出する排出口と、を備え、前記挿入部先端に前記装着部が装着されたときに、前記排出口により形成される管路の断面積と前記送水用チャンネルの断面積とがほぼ等しい内視鏡用キャップを提供する。 In order to achieve the above object, the present invention provides the following means.
The present invention is a cylindrical cap body having a distal end and a proximal end opened, a mounting portion provided on the proximal end side of the cap body and attached to the distal end of an insertion portion having a water supply channel of an endoscope, Provided on the distal end side of the cap body, when the attachment portion is attached to the distal end of the endoscope insertion portion and the distal end of the cap body is brought into contact with the subject, the interval between the distal end of the insertion portion and the subject is increased. A hood portion that forms a space for observing the subject while maintaining a constant, a discharge port that is provided in the mounting portion or the hood portion and discharges fluid in the space formed by the hood portion, An endoscope cap having a cross-sectional area of a conduit formed by the discharge port and a cross-sectional area of the water supply channel substantially equal when the mounting portion is mounted at the distal end of the insertion portion. .

本発明によれば、挿入部先端に装着部が装着されることにより、被検体の観察時に、挿入部先端、フード部及び被検体によって被検体を観察するための空間が形成されるので、患部や挿入部先端に粘液や血液等が付着して視野が悪化した場合でも、この空間内に挿入部から洗浄液等の流体を供給して局所的に灌流させることにより患部や挿入部先端を洗浄することができる。また、空間内の洗浄液等の流体を排出する排出口が設けられているので、この排出口によって洗浄液が排出される。従って、挿入部を大径化することなく被検体や挿入部の汚れを除去し視野をクリアにすることができる。
上記発明においては、前記内視鏡が走査型内視鏡であることとしてもよい。 According to the present invention, since the attachment portion is attached to the distal end of the insertion portion, a space for observing the subject is formed by the distal end of the insertion portion, the hood portion, and the subject during observation of the subject. Even if mucus or blood adheres to the distal end of the insertion portion and the visual field deteriorates, the affected portion and the distal end of the insertion portion are washed by locally perfusing the space by supplying a fluid such as a washing liquid from the insertion portion. be able to. In addition, since a discharge port for discharging a fluid such as a cleaning solution in the space is provided, the cleaning solution is discharged through this discharge port. Therefore, the visual field can be cleared by removing the contamination of the subject and the insertion portion without increasing the diameter of the insertion portion.
In the above invention, the endoscope may be a scanning endoscope.

本発明においては、前記フード部が、前記挿入部の先端に設けられた検出部の開口数に基づく角度で、内周面の口径が前記装着部の先端から前記キャップ本体の先端に向かって次第に広がっていることが好ましい。
このようにすることで、挿入部の照明光学系による照明光を遮ることなく被検体に配光することができるので、ケラレを防止して視野をクリアにすることができる。 In the present invention, the hood portion has an angle based on the numerical aperture of the detection portion provided at the distal end of the insertion portion, and the diameter of the inner peripheral surface gradually increases from the distal end of the mounting portion toward the distal end of the cap body. It is preferable to spread.
By doing so, it is possible to distribute the light to the subject without blocking the illumination light from the illumination optical system of the insertion portion, and thus it is possible to prevent vignetting and clear the field of view.

本発明においては、前記排出口が、前記装着部の内周面に形成された溝であることが好ましい。
このようにすることで、装着部が挿入部先端に装着されたときに、溝と挿入部外周面との間に洗浄液等の流体を排水する流路が形成されるので、挿入部から吐出した洗浄液を挿入部先端、フード部及び被検体によって形成される空間内に満遍なく灌流させて被検体及び挿入部先端を効率よく洗浄し、さらに、溝によって形成される流路から洗浄液を排出することができる。 In this invention, it is preferable that the said discharge port is a groove | channel formed in the internal peripheral surface of the said mounting part.
By doing so, when the mounting portion is mounted at the distal end of the insertion portion, a flow path for draining a fluid such as cleaning liquid is formed between the groove and the outer peripheral surface of the insertion portion. The cleaning liquid can be uniformly perfused in the space formed by the distal end of the insertion portion, the hood portion, and the subject to efficiently clean the subject and the distal end of the insertion portion, and the cleaning liquid can be discharged from the flow path formed by the groove. it can.

本発明においては、前記排出口が、前記フード部の外壁を貫通する貫通孔又は前記フード部の先端に設けられた切り欠きであることが好ましい。
排出口がフード部の外壁を貫通する貫通孔である場合には、貫通孔から洗浄液を排出することができる。また排出口が切り欠きである場合には、装着部が挿入部先端に装着されたときに、切り欠きと被検体との間に洗浄液等の流体を排出する流路が形成されるので、この流路から洗浄液を排出することができる。このように、挿入部から吐出した洗浄液を挿入部先端、フード部及び被検体によって形成される空間内に満遍なく灌流させて被検体及び挿入部先端を効率よく洗浄し、さらに、貫通孔又は切り欠きと被検体との間に形成される流路から洗浄液を排出することができる。 In this invention, it is preferable that the said discharge port is a notch provided in the through-hole which penetrates the outer wall of the said hood part, or the front-end | tip of the said hood part.
When the discharge port is a through hole penetrating the outer wall of the hood portion, the cleaning liquid can be discharged from the through hole. Further, when the discharge port is a notch, a flow path for discharging a fluid such as a cleaning solution is formed between the notch and the subject when the mounting portion is mounted at the distal end of the insertion portion. The cleaning liquid can be discharged from the flow path. As described above, the cleaning liquid discharged from the insertion portion is uniformly perfused into the space formed by the insertion portion tip, the hood portion, and the subject to efficiently wash the subject and the insertion portion tip, and further, through holes or notches The cleaning liquid can be discharged from the flow path formed between the sample and the subject.

また、本発明においては、送水用チャンネルを有する挿入部を備える内視鏡装置と、該内視鏡装置の挿入部先端に装着される内視鏡用キャップとを備え、該内視鏡用キャップが、先端と基端とが開口した筒状のキャップ本体と、該キャップ本体の基端側に設けられ、前記挿入部先端に装着するための装着部と、前記キャップ本体の先端側に設けられ、前記装着部を内視鏡挿入部先端に装着して前記キャップ本体の先端を被検体に接触させたときに、前記挿入部先端と被検体との間に被検体を観察するための空間を形成するフード部とを有し、前記挿入部が、その外面に、該挿入部の長手方向に沿って、少なくとも該挿入部の先端から該挿入部への前記装着部の装着範囲に亘って形成された溝を備え、前記挿入部に前記装着部が装着されたときに、該装着部の内周面と前記溝とによって形成される管路の断面積と前記送水用チャンネルの断面積とがほぼ等しい内視鏡ユニットを提供する。 The present invention further includes an endoscope apparatus including an insertion portion having a water supply channel, and an endoscope cap attached to the distal end of the insertion portion of the endoscope device. Is provided on the distal end side of the cap body, a cylindrical cap body having an opening at the distal end and the proximal end, a mounting portion provided on the proximal end side of the cap body, and mounted on the distal end of the insertion portion. A space for observing the subject between the distal end of the insertion portion and the subject when the attachment portion is attached to the distal end of the endoscope insertion portion and the tip of the cap body is brought into contact with the subject. The insertion portion is formed on the outer surface of the insertion portion along the longitudinal direction of the insertion portion over at least the attachment range of the attachment portion from the distal end of the insertion portion to the insertion portion. comprising a by grooves, when the mounting portion is attached to the insertion portion Provides an endoscopic unit and the cross-sectional area of the inner peripheral surface and the groove and the cross-sectional area of the conduit being formed by said water supply channel of said mounting portion is substantially equal.

本発明によれば、挿入部先端に装着部が装着されることにより、被検体の観察時に、挿入部先端、フード部及び被検体によって被検体を観察するための空間が形成されるので、患部や挿入部先端に粘液や血液等が付着して視野が悪化した場合でも、この空間内に挿入部から洗浄液等の流体を供給して局所的に灌流させることができる。また、装着部が挿入部先端に装着されたときに、挿入部に形成された溝と装着部内周面との間に洗浄液等の流体を排水する流路が形成されるので、挿入部から吐出した洗浄液を挿入部先端、フード部及び被検体によって形成される空間内に満遍なく灌流させて被検体及び挿入部先端を効率よく洗浄し、溝によって形成される流路により洗浄液を排出することができる。従って、挿入部を大径化することなく被検体や挿入部の汚れを除去し視野をクリアにすることができる。   According to the present invention, since the attachment portion is attached to the distal end of the insertion portion, a space for observing the subject is formed by the distal end of the insertion portion, the hood portion, and the subject during observation of the subject. Even when mucus, blood, or the like adheres to the distal end of the insertion portion and the field of view deteriorates, a fluid such as a cleaning liquid can be supplied into the space from the insertion portion and locally perfused. In addition, when the mounting part is mounted at the distal end of the insertion part, a flow path for draining a fluid such as cleaning liquid is formed between the groove formed in the insertion part and the inner peripheral surface of the mounting part. The cleaning liquid can be uniformly perfused in the space formed by the insertion portion tip, the hood portion, and the subject to efficiently clean the subject and the insertion portion tip, and the cleaning solution can be discharged by the flow path formed by the groove. . Therefore, the visual field can be cleared by removing the contamination of the subject and the insertion portion without increasing the diameter of the insertion portion.

本発明においては、前記挿入部に前記装着部が装着されたときに、該装着部の内周面と前記溝とによって形成される管路の断面積と前記送水用チャンネルの断面積とがほぼ等しい。
このようにすることで、連続的に送水を行った場合に、挿入部先端、フード部及び被検体によって形成される空間内に供給された洗浄液等が、送水の際の水圧によって装着部の内周面と溝とによって形成される管路から連続的に排出されるので常に視野をクリアにすることができる。 In the present invention, when the attachment portion is attached to the insertion portion, the cross-sectional area of the pipe line formed by the inner peripheral surface of the attachment portion and the groove is substantially equal to the cross-sectional area of the water supply channel. Equal .
In this way, when water is supplied continuously, the cleaning liquid or the like supplied in the space formed by the distal end of the insertion portion, the hood portion, and the subject is absorbed by the water pressure at the time of water supply. Since it is continuously discharged from the conduit formed by the peripheral surface and the groove, the field of view can always be cleared.

本発明によれば、挿入部を大径化することなく被検体や挿入部の汚れを除去し視野をクリアにすることができるという効果を奏する。   According to the present invention, there is an effect that the visual field can be cleared by removing the contamination of the subject and the insertion portion without increasing the diameter of the insertion portion.

本発明の第１の実施形態に係る内視鏡用キャップの参考図である。1 is a reference diagram of an endoscope cap according to a first embodiment of the present invention. 本発明の第１の実施形態に係る内視鏡用キャップの断面図である。It is sectional drawing of the cap for endoscopes which concerns on the 1st Embodiment of this invention. 本発明の第２の実施形態に係る内視鏡ユニットに適用される内視鏡の挿入部先端の斜視図である。It is a perspective view of the insertion part front-end | tip of the endoscope applied to the endoscope unit which concerns on the 2nd Embodiment of this invention. 本発明の第２の実施形態に係る内視鏡ユニットに適用される内視鏡の挿入部先端及び内視鏡用キャップの断面図である。It is sectional drawing of the insertion part front-end | tip of an endoscope applied to the endoscope unit which concerns on the 2nd Embodiment of this invention, and the cap for endoscopes. 本発明に係る内視鏡ユニットに適用される内視鏡の挿入部先端の他の例を示す斜視図である。It is a perspective view which shows the other example of the insertion part front-end | tip of the endoscope applied to the endoscope unit which concerns on this invention.

（第１の実施形態）
以下に、本発明の一実施形態に係る内視鏡用キャップ１について図面を参照して説明する。
図１及び図２に示すように、内視鏡用キャップ１は、内視鏡の挿入部先端１０に装着して用いられるものであり、先端と基端とが開口した筒状のキャップ本体２、キャップ本体２の基端側に設けられた装着部３、キャップ本体２の先端側に設けられたフード部４を備えている。 (First embodiment)
Hereinafter, an endoscope cap 1 according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the endoscope cap 1 is used by being attached to the distal end 10 of the insertion portion of the endoscope, and has a cylindrical cap body 2 having an open distal end and a proximal end. , A mounting portion 3 provided on the proximal end side of the cap body 2 and a hood portion 4 provided on the distal end side of the cap body 2.

装着部３は、キャップ本体２の基端側に設けられ、その内周の口径が内視鏡の挿入部先端１０の外周の口径と略等しく、挿入部先端１０に外嵌することにより装着されるようになっている。装着部３の内周面には、キャップ本体２の長手方向に沿って装着部３の基端から先端に亘る溝５が等間隔で３本形成されている。これにより、装着部３が挿入部先端１０に装着されたときに、装着部３の内周面と挿入部先端１０の外周面とが密着すると共に、溝５と挿入部先端１０の外周面との間に排出口としての管路７が形成されるようになっている。なお、溝５は、溝５と挿入部先端１０の外周面との間に形成される管路７の断面積が、挿入部の送水用チャンネルの断面積と略等しくなるように形成されている。   The mounting portion 3 is provided on the base end side of the cap body 2, and the inner diameter thereof is substantially equal to the outer diameter of the insertion portion distal end 10 of the endoscope, and is attached by being externally fitted to the insertion portion distal end 10. It has become so. Three grooves 5 extending from the proximal end to the distal end of the mounting portion 3 along the longitudinal direction of the cap body 2 are formed on the inner peripheral surface of the mounting portion 3 at equal intervals. Thus, when the mounting portion 3 is mounted on the insertion portion distal end 10, the inner peripheral surface of the mounting portion 3 and the outer peripheral surface of the insertion portion distal end 10 are in close contact with each other, and the groove 5 and the outer peripheral surface of the insertion portion distal end 10 are A pipe line 7 serving as a discharge port is formed between the two. In addition, the groove | channel 5 is formed so that the cross-sectional area of the pipe line 7 formed between the groove | channel 5 and the outer peripheral surface of the insertion part front-end | tip 10 may become substantially equal to the cross-sectional area of the channel for water supply of an insertion part. .

フード部４は、キャップ本体２の先端側に設けられている。すなわち、フード部４の基端は装着部３の先端に連結され、フード部４の先端はキャップ本体２の先端となっている。フード部４は、内視鏡用キャップ１が装着される挿入部先端１０に設けられた検出部１１の開口数に基づく角度で、その内周面の口径がフード部４の基端から先端に向かって、つまり、装着部３の先端からキャップ本体２の先端に向かって、次第に広がっている。   The hood portion 4 is provided on the distal end side of the cap body 2. That is, the base end of the hood portion 4 is connected to the tip of the mounting portion 3, and the tip of the hood portion 4 is the tip of the cap body 2. The hood portion 4 has an angle based on the numerical aperture of the detection portion 11 provided at the insertion portion distal end 10 to which the endoscope cap 1 is attached, and the inner peripheral surface has a diameter from the proximal end to the distal end of the hood portion 4. That is, it gradually spreads from the tip of the mounting portion 3 toward the tip of the cap body 2.

ここで、検出部１１の開口数は、開口数をＮＡ、屈折率をｎ、検出部１１の開口数に基づく角度をθとしたとき、以下の（１）式で表わされる。
ＮＡ＝ｎｓｉｎθ ・・・ （１）
この（１）式より、検出部１１の開口数に基づく角度θは以下の（２）式で表わされる。
θ＝ｓｉｎ−１（ＮＡ／ｎ） ・・・ （２）
なお、屈折率ｎは、空気中ではｎ＝１．０、水中ではｎ＝１．３３であるため、検出部１１の開口数に基づく角度θとしては、例えば、開口数が０．６である場合には、空気中では３７°、水中では２６°となる。 Here, the numerical aperture of the detection unit 11 is expressed by the following equation (1), where NA is the numerical aperture, n is the refractive index, and θ is the angle based on the numerical aperture of the detection unit 11.
NA = nsinθ (1)
From this equation (1), the angle θ based on the numerical aperture of the detector 11 is expressed by the following equation (2).
θ = sin −1 (NA / n) (2)
Since the refractive index n is n = 1.0 in the air and n = 1.33 in the water, the angle θ based on the numerical aperture of the detection unit 11 is, for example, 0.6. In some cases, it is 37 ° in air and 26 ° in water.

また、フード部４の基端は、装着部３の内周面よりも内側に突出したストッパ６となっており、装着部３に挿入部が装着されたときに、挿入部先端１０がストッパ６に当接することで挿入部先端１０がフード部４内を干渉しないようになっている。
従って、フード部４は、装着部３を内視鏡の挿入部先端１０に装着してキャップ本体２の先端を被検体に接触させたときに、挿入部先端１０と被検体との間隔を一定に保持しながら被検体を観察するための空間を形成する。 Further, the base end of the hood portion 4 is a stopper 6 protruding inward from the inner peripheral surface of the mounting portion 3, and when the insertion portion is mounted on the mounting portion 3, the distal end of the insertion portion 10 is the stopper 6. The insertion portion tip 10 is prevented from interfering with the inside of the hood portion 4.
Therefore, the hood portion 4 has a constant interval between the insertion portion distal end 10 and the subject when the attachment portion 3 is attached to the insertion portion distal end 10 of the endoscope and the distal end of the cap body 2 is brought into contact with the subject. A space for observing the subject is formed while being held.

以下に、このように構成された内視鏡用キャップ１の作用について説明する。
内視鏡用キャップ１の装着部３を内視鏡の挿入部先端１０に外嵌することにより装着し、内視鏡用キャップ１が装着された挿入部先端１０を患者の体腔内に挿入し、患部周辺の被検体に内視鏡用キャップ１の先端を接触させる。このとき、挿入部先端１０とフード部４の外壁と被検体との間に、被検体を観察するための空間が形成されるので、この空間内に挿入部先端１０の照明光学系１３から照明光を配光して被検体を観察する。被検体の観察においては、フード部４により挿入部先端１０と被検体との間隔が一定に保持されるので、一定の焦点距離を保ちながら観察することができる。 Below, an effect | action of the cap 1 for endoscopes comprised in this way is demonstrated.
The attachment portion 3 of the endoscope cap 1 is attached by being externally fitted to the insertion portion distal end 10 of the endoscope, and the insertion portion distal end 10 to which the endoscope cap 1 is attached is inserted into the body cavity of the patient. The tip of the endoscope cap 1 is brought into contact with the subject around the affected area. At this time, since a space for observing the subject is formed between the insertion portion distal end 10 and the outer wall of the hood portion 4 and the subject, illumination is performed from the illumination optical system 13 of the insertion portion distal end 10 in this space. Light is distributed and the subject is observed. In observing the subject, since the distance between the insertion portion tip 10 and the subject is kept constant by the hood portion 4, observation can be performed while maintaining a constant focal length.

観察中に粘液や血液などが被検体や挿入部先端１０の照明光学系１３や検出部１１に付着して観察を妨げる場合には、挿入部先端１０の送水用チャンネル１２から挿入部先端１０とフード部４の外壁と被検体との間に形成された空間に水等の洗浄液を供給する。挿入部先端１０の送水用チャンネル１２からこの空間内に洗浄液が供給されると、供給時の水圧により空間内を洗浄液が灌流し、患部や挿入部先端１０が満遍なく洗浄される。そして、空間内の洗浄液は、洗浄液を供給した際の水圧に応じて溝５と挿入部先端１０の外周面との間に形成される排水口としての管路を介して空間外に連続的に排出される。   When mucus or blood adheres to the subject or the illumination optical system 13 or the detection unit 11 at the distal end 10 of the insertion portion during observation and obstructs the observation, the insertion portion distal end 10 is A cleaning liquid such as water is supplied to a space formed between the outer wall of the hood unit 4 and the subject. When the cleaning liquid is supplied into this space from the water supply channel 12 at the distal end of the insertion portion 10, the cleaning liquid is perfused in the space by the water pressure at the time of supply, and the affected part and the distal end 10 of the insertion portion are evenly cleaned. And the cleaning liquid in the space is continuously out of the space via a conduit as a drainage port formed between the groove 5 and the outer peripheral surface of the insertion portion distal end 10 according to the water pressure when the cleaning liquid is supplied. Discharged.

このように、被検体の観察時に、挿入部先端１０、フード部４及び被検体によって被検体を観察するための空間が形成されるので、この空間内に挿入部先端１０の送水用チャンネル１２から洗浄液等の流体を供給することにより、供給時の水圧によって局所的に灌流させることができる。これにより、患部や挿入部先端１０を満遍なく洗浄することができるので、被検体の観察を妨げるような汚れを除去することができる。   As described above, when the subject is observed, a space for observing the subject is formed by the insertion portion tip 10, the hood portion 4, and the subject, so that the water supply channel 12 of the insertion portion tip 10 can be formed in this space. By supplying a fluid such as a cleaning liquid, it can be locally perfused by the water pressure at the time of supply. Thereby, since the affected part and the distal end 10 of the insertion part can be washed evenly, it is possible to remove dirt that hinders observation of the subject.

また、空間内の洗浄液等の流体を排出する排出口（管路７）が形成され、さらに、その断面積が、挿入部先端１０の送水用チャンネル１２の断面積と略等しくなっているので、この排出口を介して洗浄液を供給した際の水圧に応じて洗浄液が空間外に連続的に排出される。従って、挿入部先端１０に洗浄液を排出するためのチャンネルを設ける必要がないので挿入部先端１０を大径化することなく被検体や挿入部先端１０の汚れを除去し視野をクリアにすることができる。   In addition, a discharge port (pipe 7) for discharging a fluid such as cleaning liquid in the space is formed, and the cross-sectional area thereof is substantially equal to the cross-sectional area of the water supply channel 12 at the insertion portion distal end 10. The cleaning liquid is continuously discharged out of the space according to the water pressure when the cleaning liquid is supplied through the discharge port. Accordingly, since it is not necessary to provide a channel for discharging the cleaning liquid at the insertion portion distal end 10, it is possible to remove the contamination of the subject and the insertion portion distal end 10 without increasing the diameter of the insertion portion distal end and to clear the visual field. it can.

さらに、フード部４の基端から先端にかけて、挿入部先端１０の検出部１１の開口数に応じた角度で口径が広がっているので、照明光を遮ることなく被検体に配光することができるので、ケラレによって観察が妨げられることがない。   Further, since the diameter of the hood portion 4 is widened from the base end to the distal end of the hood portion 4 at an angle corresponding to the numerical aperture of the detection portion 11 of the insertion portion distal end 10, light can be distributed to the subject without blocking the illumination light. Therefore, observation is not hindered by vignetting.

なお、上記した実施形態においては、装着部３の内周面に溝５を設けることによって排出口としての管路７を形成する例を示したが、排出口の構成はこれに限られるものではない。例えば、フード部４の外壁を貫通する貫通孔を設けてこの貫通孔を洗浄液の排出口とする構成や、フード部４の先端に切り欠きを設けることにより観察時に切り欠きと被検体との間に排出口が形成されるような構成とすることもできる。また、溝の本数も適宜決定することができる。   In the above-described embodiment, the example in which the conduit 7 as the discharge port is formed by providing the groove 5 on the inner peripheral surface of the mounting portion 3 is shown, but the configuration of the discharge port is not limited to this. Absent. For example, a through-hole penetrating the outer wall of the hood portion 4 is provided, and the through-hole is used as an outlet for the cleaning liquid. It is also possible to adopt a configuration in which a discharge port is formed. Further, the number of grooves can be determined as appropriate.

（第２の実施形態）
続いて、本発明の第２の実施形態について説明する。
以下に、本発明の一実施形態に係る内視鏡ユニットについて図面を参照して説明する。
内視鏡ユニットは、内視鏡装置及び内視鏡装置の挿入部先端２０に取り付けられる内視鏡用キャップ３０を備えている。 (Second Embodiment)
Subsequently, a second embodiment of the present invention will be described.
Hereinafter, an endoscope unit according to an embodiment of the present invention will be described with reference to the drawings.
The endoscope unit includes an endoscope device and an endoscope cap 30 attached to the distal end 20 of the insertion portion of the endoscope device.

内視鏡用キャップ３０は、先端と基端とが開口した筒状のキャップ本体２と、キャップ本体２の基端側に設けられ挿入部先端に装着するための装着部３と、キャップ本体２の先端側に設けられ装着部３を内視鏡挿入部先端１０に装着してキャップ本体２の先端を被検体に接触させたときに挿入部先端２０と被検体との間に被検体を観察するための空間を形成するフード部４を備えており、上述した第１の実施形態における内視鏡用キャップ１に比して、装着部３の内周面に溝が設けられていない点のみが相違する。従って、内視鏡用キャップ２０における内視鏡用キャップ１と同様の構成については同符号を付し、その詳細な説明を省略する。   The endoscope cap 30 includes a cylindrical cap main body 2 having an open front end and a base end, a mounting portion 3 provided on the base end side of the cap main body 2 for mounting on the distal end of the insertion portion, and the cap main body 2. When the attachment portion 3 is attached to the endoscope insertion portion tip 10 and the tip of the cap body 2 is brought into contact with the subject, the subject is observed between the insertion portion tip 20 and the subject. Only in that no groove is provided on the inner peripheral surface of the mounting portion 3 as compared to the endoscope cap 1 in the first embodiment described above. Is different. Therefore, the same reference numerals are given to the same configuration as the endoscope cap 1 in the endoscope cap 20, and the detailed description thereof is omitted.

図３は内視鏡ユニットに適用される内視鏡装置の挿入部先端２０を示している。挿入部先端２０には、図示しない光源から射出された撮像用の光による被検体からの戻り光を検出する検出部２１、被検体に対して水等の洗浄液を供給するための送水用チャンネル２２及び被検体に照明光を配光するための照明光学系２３が設けられている。   FIG. 3 shows an insertion portion distal end 20 of an endoscope apparatus applied to the endoscope unit. A detection unit 21 that detects return light from the subject due to imaging light emitted from a light source (not shown) and a water supply channel 22 for supplying a cleaning liquid such as water to the subject are provided at the distal end 20 of the insertion unit. In addition, an illumination optical system 23 for distributing illumination light to the subject is provided.

また、挿入部先端２０の外周面には、長手方向に沿って、挿入部の先端から挿入部への内視鏡用キャップ２０の装着部３の装着範囲よりも長い範囲に亘って形成された溝２４が等間隔で３本設けられている。溝２４は、挿入部先端２０に後述する内視鏡用キャップ３０の装着部３が装着されたときに、装着部３の内周面と溝２４とによって排出口としての管路２５を形成するようになっており、溝２４はこの管路２５の断面積と送水用チャンネル２２の断面積とがほぼ等しくなるように形成されている。   Further, the outer peripheral surface of the insertion portion distal end 20 is formed along the longitudinal direction over a range longer than the attachment range of the attachment portion 3 of the endoscope cap 20 from the distal end of the insertion portion to the insertion portion. Three grooves 24 are provided at equal intervals. The groove 24 forms a conduit 25 as a discharge port by the inner peripheral surface of the mounting portion 3 and the groove 24 when the mounting portion 3 of the endoscope cap 30 to be described later is mounted at the distal end 20 of the insertion portion. The groove 24 is formed so that the cross-sectional area of the conduit 25 and the cross-sectional area of the water supply channel 22 are substantially equal.

内視鏡用キャップ３０は、図４に示すように、先端と基端とが開口した筒状のキャップ本体２と、キャップ本体２の基端側に設けられ挿入部先端に装着するための装着部３と、キャップ本体２の先端側に設けられ装着部３を内視鏡挿入部先端１０に装着してキャップ本体２の先端を被検体に接触させたときに挿入部先端２０と被検体との間に被検体を観察するための空間を形成するフード部４を備えており、上述した第１の実施形態における内視鏡用キャップ１に比して、装着部３の内周面に溝が設けられていない点のみが相違する。従って、内視鏡用キャップ２０における内視鏡用キャップ１と同様の構成については同符号を付し、その詳細な説明を省略する。   As shown in FIG. 4, the endoscope cap 30 has a cylindrical cap body 2 having an opening at the distal end and a proximal end, and a mounting for mounting on the distal end of the insertion portion provided on the proximal end side of the cap body 2. The insertion portion distal end 20 and the subject when the attachment portion 3 is attached to the endoscope insertion portion distal end 10 and the distal end of the cap main body 2 is brought into contact with the subject. A hood portion 4 that forms a space for observing the subject is provided in between, and a groove is formed in the inner peripheral surface of the mounting portion 3 as compared with the endoscope cap 1 in the first embodiment described above. The only difference is that is not provided. Therefore, the same reference numerals are given to the same configuration as the endoscope cap 1 in the endoscope cap 20, and the detailed description thereof is omitted.

以下に、このように構成された内視鏡ユニットの作用について説明する。
内視鏡用キャップ３０の装着部３を内視鏡の挿入部先端２０に外嵌することにより装着し、内視鏡用キャップ３０が装着された挿入部を患者の体腔内に挿入し、患部周辺の被検体に内視鏡用キャップ３０の先端を接触させる。このとき、挿入部先端２０とフード部４の外壁と被検体との間に、被検体を観察するための空間が形成されるので、この空間内に照明光学系２３から照明光を配光して被検体を観察する。被検体の観察においては、フード部４により挿入部先端２０と被検体との間隔が一定に保持されるので、一定の焦点距離を保ちながら観察することができる。 Hereinafter, the operation of the endoscope unit configured as described above will be described.
The attachment part 3 of the endoscope cap 30 is attached by external fitting to the insertion part distal end 20 of the endoscope, and the insertion part to which the endoscope cap 30 is attached is inserted into the body cavity of the patient, and the affected part The tip of the endoscope cap 30 is brought into contact with a peripheral subject. At this time, a space for observing the subject is formed between the insertion portion distal end 20 and the outer wall of the hood portion 4 and the subject, so that illumination light is distributed from the illumination optical system 23 in this space. And observe the subject. In the observation of the subject, since the distance between the insertion portion tip 20 and the subject is kept constant by the hood portion 4, the observation can be performed while maintaining a constant focal length.

観察中に粘液や血液などが被検体や挿入部先端１０に付着して観察を妨げる場合には、送水用チャンネル２２から挿入部先端２０とフード部４の外壁と被検体との間に形成された空間に水等の洗浄液を供給する。送水用チャンネル２２からこの空間内に洗浄液が供給されると、供給時の水圧により空間内を洗浄液が灌流し、患部や挿入部先端２０が満遍なく洗浄される。そして、空間内の洗浄液は、洗浄液を供給した際の水圧に応じて挿入部先端２０の外周面に設けられた溝２４と内視鏡用キャップ３０の内周面との間に形成される排水口としての管路２５を介して空間外に連続的に排出される。   If mucus or blood adheres to the subject or the distal end 10 of the insertion portion during observation and obstructs the observation, it is formed from the water supply channel 22 between the distal end 20 of the insertion portion, the outer wall of the hood portion 4, and the subject. Supply cleaning liquid such as water to the open space. When the cleaning liquid is supplied into the space from the water supply channel 22, the cleaning liquid is perfused in the space by the water pressure at the time of supply, and the affected part and the distal end 20 of the insertion part are cleaned evenly. The cleaning liquid in the space is drainage formed between the groove 24 provided on the outer peripheral surface of the insertion portion distal end 20 and the inner peripheral surface of the endoscope cap 30 according to the water pressure when the cleaning liquid is supplied. It is continuously discharged out of the space through the duct 25 serving as a mouth.

このように、被検体の観察時に、挿入部先端２０、フード部４及び被検体によって被検体を観察するための空間が形成されるので、この空間内に送水用チャンネル２２から洗浄液等の流体を供給することにより、供給時の水圧によって局所的に灌流させることができる。これにより、患部や挿入部先端２０を満遍なく洗浄することができるので、被検体の観察を妨げるような汚れを除去することができる。   As described above, when the subject is observed, a space for observing the subject is formed by the insertion portion distal end 20, the hood portion 4 and the subject, so that a fluid such as a cleaning liquid is supplied from the water supply channel 22 into the space. By supplying, it can perfuse locally by the water pressure at the time of supply. Thereby, since the affected part and the distal end 20 of the insertion part can be washed evenly, it is possible to remove dirt that hinders observation of the subject.

また、空間内の洗浄液等の流体を排出する排出口（管路２５）が形成され、さらに、その断面積が、挿入部先端２０の送水用チャンネル２２の断面積と略等しくなっているので、この排出口を介して洗浄液を供給した際の水圧に応じて洗浄液が空間外に連続的に排出される。従って、挿入部先端２０に洗浄液を排出するためのチャンネルを設ける必要がないので挿入部を大径化することなく被検体や挿入部の汚れを除去し視野をクリアにすることができる。   In addition, a discharge port (pipe 25) for discharging a fluid such as cleaning liquid in the space is formed, and the cross-sectional area thereof is substantially equal to the cross-sectional area of the water supply channel 22 at the distal end of the insertion portion 20. The cleaning liquid is continuously discharged out of the space according to the water pressure when the cleaning liquid is supplied through the discharge port. Therefore, it is not necessary to provide a channel for discharging the cleaning liquid at the distal end 20 of the insertion portion, so that the subject and the contamination of the insertion portion can be removed and the visual field can be cleared without increasing the diameter of the insertion portion.

なお、上記した実施形態においては、挿入部先端２０の外周面に直線状の溝２４を３本設けることによって排出口としての管路２５を形成する例を示したが、排出口の構成はこれに限られるものではない。例えば、図５に示すように、挿入部先端４０の長手方向に沿って、外周面を取り囲むような緩やかな螺旋状の溝４４とすることもできる。また、溝の本数も適宜決定することができる。   In the above-described embodiment, the example in which the conduit 25 as the discharge port is formed by providing three linear grooves 24 on the outer peripheral surface of the insertion portion distal end 20 is shown. It is not limited to. For example, as shown in FIG. 5, a gentle spiral groove 44 surrounding the outer peripheral surface can be formed along the longitudinal direction of the insertion portion distal end 40. Further, the number of grooves can be determined as appropriate.

さらに、溝の長さを、挿入部の先端から挿入部への内視鏡用キャップ２０の装着部３の装着範囲よりも長い範囲としたが、これに限られるものではなく、例えば、挿入部の先端から挿入部への内視鏡用キャップ２０の装着部３の装着範囲に亘る長さとしてもよい。   Further, the length of the groove is set to be longer than the mounting range of the mounting portion 3 of the endoscope cap 20 from the distal end of the insertion portion to the insertion portion, but is not limited to this. For example, the insertion portion It may be a length over the mounting range of the mounting portion 3 of the endoscope cap 20 from the distal end to the insertion portion.

１ 内視鏡用キャップ
２ キャップ本体
３ 装着部
４ フード部
５ 溝
６ ストッパ
７ 管路
１０ 挿入部先端
１１ 検出部
１２ 送水用チャンネル
１３ 照明光学系
２０ 挿入部先端
２１ 検出部
２２ 送水用チャンネル
２３ 照明光学系
２４ 溝
３０ 内視鏡用キャップ
４０ 挿入部先端
４４ 溝 DESCRIPTION OF SYMBOLS 1 Endoscope cap 2 Cap body 3 Mounting part 4 Hood part 5 Groove 6 Stopper 7 Pipe line 10 Insertion part front end 11 Detection part 12 Water supply channel 13 Illumination optical system 20 Insertion part front end 21 Detection part 22 Water supply channel 23 Illumination Optical system 24 Groove 30 Endoscope cap 40 Insertion section tip 44 Groove

Claims (6)

先端と基端とが開口した筒状のキャップ本体と、
該キャップ本体の基端側に設けられ、内視鏡の送水用チャンネルを有する挿入部先端に装着される装着部と、
前記キャップ本体の先端側に設けられ、前記装着部を内視鏡挿入部先端に装着して前記キャップ本体の先端を被検体に接触させたときに、前記挿入部先端と被検体との間隔を一定に保持して前記被検体を観察するための空間を形成するフード部と、
前記装着部又は前記フード部に設けられ、該フード部によって形成される空間内の流体を排出する排出口と、を備え、
前記挿入部先端に前記装着部が装着されたときに、前記排出口により形成される管路の断面積と前記送水用チャンネルの断面積とがほぼ等しい内視鏡用キャップ。 A cylindrical cap body having a distal end and a proximal end opened;
A mounting portion that is provided on a proximal end side of the cap body and is mounted on a distal end of an insertion portion having a water supply channel of an endoscope;
Provided on the distal end side of the cap body, when the attachment portion is attached to the distal end of the endoscope insertion portion and the distal end of the cap body is brought into contact with the subject, the interval between the distal end of the insertion portion and the subject is increased. A hood section that holds the space to form a space for observing the subject;
Provided in the mounting part or the hood part, and a discharge port for discharging the fluid in the space formed by the hood part ,
An endoscope cap , wherein a cross-sectional area of a conduit formed by the discharge port and a cross-sectional area of the water supply channel are substantially equal when the mounting portion is mounted at the distal end of the insertion portion . 前記フード部が、前記挿入部の先端に設けられた検出部の開口数に基づく角度で、内周面の口径が前記装着部の先端から前記キャップ本体の先端に向かって次第に広がっている請求項１に記載の内視鏡用キャップ。   The hood portion has an angle based on a numerical aperture of a detection portion provided at a distal end of the insertion portion, and an aperture of an inner peripheral surface gradually widens from the distal end of the mounting portion toward the distal end of the cap body. The endoscope cap according to 1. 前記排出口が、前記装着部の内周面に形成された溝である請求項１又は請求項２に記載の内視鏡用キャップ。   The endoscope cap according to claim 1, wherein the discharge port is a groove formed on an inner peripheral surface of the mounting portion. 前記排出口が、前記フード部の外壁を貫通する孔又は前記フード部の先端に設けられた切り欠きである請求項１又は請求項２に記載の内視鏡用キャップ。   The endoscope cap according to claim 1 or 2, wherein the discharge port is a hole penetrating an outer wall of the hood part or a notch provided at a tip of the hood part. 前記内視鏡が走査型内視鏡である請求項１に記載の内視鏡用キャップ。The endoscope cap according to claim 1, wherein the endoscope is a scanning endoscope. 送水用チャンネルを有する挿入部を備える内視鏡装置と、該内視鏡装置の挿入部先端に装着される内視鏡用キャップとを備え、
該内視鏡用キャップが、先端と基端とが開口した筒状のキャップ本体と、該キャップ本体の基端側に設けられ、前記挿入部先端に装着するための装着部と、前記キャップ本体の先端側に設けられ、前記装着部を内視鏡挿入部先端に装着して前記キャップ本体の先端を被検体に接触させたときに、前記挿入部先端と被検体との間に被検体を観察するための空間を形成するフード部とを有し、
前記挿入部が、その外面に、該挿入部の長手方向に沿って、少なくとも該挿入部の先端から該挿入部への前記装着部の装着範囲に亘って形成された溝を備え、
前記挿入部に前記装着部が装着されたときに、該装着部の内周面と前記溝とによって形成される管路の断面積と前記送水用チャンネルの断面積とがほぼ等しい内視鏡ユニット。 An endoscope apparatus including an insertion portion having a water supply channel, and an endoscope cap attached to a distal end of the insertion portion of the endoscope device;
A tube-shaped cap body having a distal end and a proximal end opened; a mounting portion provided on a proximal end side of the cap body for mounting on the distal end of the insertion portion; and the cap body. When the attachment portion is attached to the distal end of the endoscope insertion portion and the distal end of the cap body is brought into contact with the subject, the subject is placed between the distal end of the insertion portion and the subject. A hood that forms a space for observation,
The insertion portion includes a groove formed on the outer surface thereof along the longitudinal direction of the insertion portion at least from the distal end of the insertion portion to the attachment range of the attachment portion to the insertion portion,
When the mounting portion into the insertion portion is mounted, said mounting portion inner peripheral surface and the groove and substantially equal gastroscopy the cross-sectional area of the conduit to be formed with cross-sectional area of the water feeding channels by the Mirror unit.
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