JP2013202099A - Suction operation device for endoscope - Google Patents

Suction operation device for endoscope Download PDF

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JP2013202099A
JP2013202099A JP2012071682A JP2012071682A JP2013202099A JP 2013202099 A JP2013202099 A JP 2013202099A JP 2012071682 A JP2012071682 A JP 2012071682A JP 2012071682 A JP2012071682 A JP 2012071682A JP 2013202099 A JP2013202099 A JP 2013202099A
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suction
hole
flow path
suction operation
cylinder body
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JP5856886B2 (en
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Akimoto Katayama
暁元 片山
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Hoya Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a suction operation device for an endoscope, including an excellent function, having good operability with a small press-in operation force amount, not allowing the increase of the size of the device, and not causing so-called natural suction.SOLUTION: Each of edge parts of a bottom face 18a of a lateral hole-like flow passage 18 facing an inlet of a longitudinal hole-like flow passage 16 is formed in a slant face 18b obliquely advancing to the longitudinal hole-like flow passage side 16, and outside air passing through the lateral hole-like flow passage 18 and flowing into the longitudinal hole-like flow passage 16 in a standby state flows to a direction along the slant faces 18b in a boundary part between the lateral hole-like flow passage 18 and the longitudinal hole-like flow passage 16.

Description

この発明は内視鏡の吸引操作装置に関する。   The present invention relates to an endoscope suction operation device.

内視鏡検査を行う際には、体内の汚液や体内に送り込み過ぎた空気等を吸引するために、挿入部の先端から適宜に吸引をする必要がある。そこで、挿入部の先端に開口する吸引管の基部が操作部に配置された吸引操作装置に接続され、外部吸引装置との接続状態を吸引操作装置で自在に開閉できるようになっている。   When performing endoscopy, it is necessary to appropriately suck in from the distal end of the insertion portion in order to suck in filthy fluid in the body, air that has been excessively fed into the body, and the like. Therefore, the base of the suction tube that opens at the distal end of the insertion portion is connected to a suction operation device disposed in the operation portion, and the connection state with the external suction device can be freely opened and closed by the suction operation device.

そのような内視鏡の吸引システムにおいては、吸引操作装置での操作により外部吸引装置の電源をオン／オフするような構成をとると、吸引動作に応答遅れが出て使い難いものになる。   In such an endoscope suction system, if the power of the external suction device is turned on / off by the operation of the suction operation device, a response delay occurs in the suction operation, which makes it difficult to use.

そこで、外部吸引装置を連続運転しておき、操作部の吸引操作装置において、待機状態では常に大気を吸引させ、必要に応じて吸引管から吸引を行うように管路の切り替え操作だけを行っている（例えば、特許文献１）。   Therefore, the external suction device is continuously operated, and in the suction operation device of the operation unit, the air is always sucked in the standby state, and only the switching operation of the pipe line is performed so that suction is performed from the suction tube as necessary. (For example, Patent Document 1).

待機状態において大気を常時吸引する方式の内視鏡の吸引操作装置においては、大気だけでなく挿入部先端からも微量の吸引をしてしまういわゆる自然吸引が発生しないように注意する必要がある。   In an endoscope suction operation device that constantly sucks air in a standby state, care must be taken not to generate so-called natural suction that causes a small amount of suction not only from the air but also from the distal end of the insertion portion.

そこで、特許文献１に記載された発明等においては、待機状態の時に挿入部先端からの吸引が行われないようにするためのシール部材が設けられている。しかし、そのようなシール部材の存在が吸引操作装置の作動を重くして、操作性を低下させている。   Therefore, in the invention described in Patent Document 1, a seal member is provided to prevent suction from the distal end of the insertion portion when in a standby state. However, the presence of such a seal member makes the operation of the suction operation device heavy and reduces the operability.

また、待機状態における大気通過路の最小断面積部分を大きくして空気流に対する管路抵抗を小さくすることでも自然吸引の発生防止に寄与することができるが、各部の管路断面積を徒に大きくしても、装置が大型化して操作性を低下させてしまうことになる。   In addition, increasing the minimum cross-sectional area of the atmospheric passage in the standby state to reduce the pipe resistance against air flow can also contribute to the prevention of natural suction, but the pipe cross-sectional area of each part can be reduced. Even if it enlarges, an apparatus will enlarge and operativity will fall.

特開平８−２５２２１６JP-A-8-252216

図８は、上述のような従来の内視鏡の吸引操作装置における待機状態を示している（特許文献１の図３参照）。図８中、９１は、内視鏡の操作部に配置されていて、連続運転される外部吸引装置に連通する吸引元管９２と内視鏡の挿入部先端に開口する吸引管９３とが接続されたシリンダ体である。   FIG. 8 shows a standby state in the above-described conventional endoscope suction operation device (see FIG. 3 of Patent Document 1). In FIG. 8, 91 is arranged in the operation part of the endoscope, and connects the suction source pipe 92 communicating with the external suction device continuously operated and the suction pipe 93 opened at the distal end of the insertion part of the endoscope. Cylinder body.

シリンダ体９１内には、その開口端側から軸線方向に押し込み操作されるピストン状の吸引操作弁９４が配置されている。９０はシール用のＯリングである。シリンダ体９１の開口端から外方に突出する吸引操作弁９４の突端には、押し込み操作ボタン９５が取り付けられている。９６は、吸引操作弁９４と押し込み操作ボタン９５とを、押し込み操作された状態から待機状態に戻すための圧縮コイルスプリングである。   In the cylinder body 91, a piston-like suction operation valve 94 that is pushed in from the opening end side in the axial direction is disposed. Reference numeral 90 denotes an O-ring for sealing. A push-in operation button 95 is attached to the projecting end of the suction operation valve 94 projecting outward from the opening end of the cylinder body 91. Reference numeral 96 denotes a compression coil spring for returning the suction operation valve 94 and the push-in operation button 95 from the pushed-in state to the standby state.

待機状態の時に吸引元管９２を経て外部吸引装置に吸引される外気が通過する縦向き穴状流路９７が、吸引操作弁９４の外周面とシリンダ体９１の内周面との間の隙間により形成されている。   A vertical hole-shaped flow path 97 through which the outside air sucked into the external suction device passes through the suction source pipe 92 in the standby state is a gap between the outer peripheral surface of the suction operation valve 94 and the inner peripheral surface of the cylinder body 91. It is formed by.

また、縦向き穴状流路９７の入口側に隣接して、それよりシリンダ体９１の開口端寄り（即ち、図８において上方）の位置には、吸引操作弁９４を径方向に貫通する横向き穴状流路９８が形成されている。   Further, in a position adjacent to the inlet side of the vertical hole-shaped flow path 97 and closer to the opening end of the cylinder body 91 (that is, the upper side in FIG. 8), the horizontal direction penetrates the suction operation valve 94 in the radial direction. A hole-shaped channel 98 is formed.

その結果、待機状態においては、外気が、押し込み操作ボタン９５とその周辺の部材などの隙間を通り、横向き穴状流路９８から縦向き穴状流路９７を経て吸引元管９２に常時吸引される。９９は、自然吸引防止のために、吸引操作弁９４の外面部に取り付けられたシール部材である。   As a result, in the standby state, outside air is constantly sucked into the suction source pipe 92 from the lateral hole-shaped flow path 98 through the vertical hole-shaped flow path 97 through the gap between the push-in operation button 95 and its peripheral members. The Reference numeral 99 denotes a seal member attached to the outer surface portion of the suction operation valve 94 to prevent natural suction.

しかし、そのようなシール部材９９（及びＯリング９０）により発生する摩擦抵抗や、それに打ち勝つために圧縮コイルスプリング９６のバネ力量を大きくしなければならない必要性等から、押し込み操作ボタン９５の操作力量が大きくなって操作性を阻害していた。   However, because of the frictional resistance generated by such a seal member 99 (and the O-ring 90) and the necessity to increase the amount of spring force of the compression coil spring 96 in order to overcome it, the operation force amount of the push-in operation button 95 is determined. Became larger and hindered operability.

そこで、シール部材９９やＯリング９０を取り除いて操作力量を低減させると共に、シリンダ体９１の内径を大きくしない範囲で縦向き穴状流路９７の断面積をできるだけ大きくすることで自然吸引を防止する構造を検討した。   Therefore, the sealing member 99 and the O-ring 90 are removed to reduce the amount of operating force, and natural suction is prevented by increasing the cross-sectional area of the vertical hole-shaped channel 97 as much as possible without increasing the inner diameter of the cylinder body 91. The structure was examined.

図９は、そのような検討を行った吸引操作装置の側面断面図（図８の場合と比較すると９０°回転した向きの断面図）であるが、待機状態の時に吸引管９３側から吸引される自然吸引が発生してしまった。   FIG. 9 is a side cross-sectional view of the suction operation device that has been studied as described above (a cross-sectional view in a direction rotated by 90 ° compared to the case of FIG. 8). Natural suction has occurred.

そこで、横向き穴状流路９８から縦向き穴状流路９７を通過する外気の流れを、コンピュータ解析によりシミュレーションした。図９に多数の小さな矢印で示されているのがその空気の流れである。   Therefore, the flow of the outside air passing through the vertical hole-shaped flow path 97 from the horizontal hole-shaped flow path 98 was simulated by computer analysis. In FIG. 9, the air flow is indicated by a number of small arrows.

図９に示されるように、吸引される外気（空気）の多くは横向き穴状流路９８内をシリンダ体９１の軸線方向に通ったあと、横向き穴状流路９８の底面９８ａにぶつかってから縦向き穴状流路９７に流れ込む。   As shown in FIG. 9, most of the sucked outside air (air) passes through the horizontal hole-shaped flow path 98 in the axial direction of the cylinder body 91 and then hits the bottom surface 98 a of the horizontal hole-shaped flow path 98. It flows into the vertically oriented hole-shaped flow path 97.

そこでの空気の流れを見ると、横向き穴状流路９８の底面９８ａ付近で急激に側方に向きを変えて、次にはシリンダ体９１の内周面にぶつかっている。そのため、図９に示されるように、縦向き穴状流路９７の入口部に、空気流が吸引操作弁９４の表面から剥離したかのような空気流のデッドスペース１００ができ、その領域において空気流の実質的な流路断面積が著しく狭められて、流路抵抗を著しく増大させていることが判明した。   Looking at the air flow there, the direction suddenly changed to the side in the vicinity of the bottom surface 98 a of the lateral hole-shaped channel 98, and then hit the inner peripheral surface of the cylinder body 91. Therefore, as shown in FIG. 9, an air flow dead space 100 is formed at the inlet portion of the vertical hole-shaped flow path 97 as if the air flow was separated from the surface of the suction operation valve 94. It has been found that the substantial channel cross-sectional area of the air flow is significantly narrowed to significantly increase the channel resistance.

そこで、大気を吸引するための流路断面積をより大きくするためにシリンダ体９１の径を大きくすれば自然吸引が発生し難くなる可能性があるが、徒にそのようにしたのでは、前述のように装置が大型化して操作性が損なわれてしまうので好ましくない。   Therefore, if the diameter of the cylinder body 91 is increased in order to increase the cross-sectional area of the flow path for sucking the atmosphere, natural suction may be difficult to occur. In this way, the apparatus becomes large and the operability is impaired, which is not preferable.

本発明は、押し込み操作力量が小さくて操作性がよく、しかも装置を大型化することなく、いわゆる自然吸引が発生しない優れた機能を備えた内視鏡の吸引操作装置を提供することを目的とする。   An object of the present invention is to provide an endoscope suction operation device having an excellent function in which a so-called natural suction does not occur without increasing the size of the device and having a small amount of pushing operation force and good operability. To do.

上記の目的を達成するため、本発明の内視鏡の吸引操作装置は、内視鏡の操作部に配置されて、連続運転される外部吸引装置に連通する吸引元管と内視鏡の挿入部先端に開口する吸引管とが接続されたシリンダ体内に、シリンダ体の開口端側から軸線方向に押し込み操作される吸引操作弁が配置され、吸引操作弁の外周面とシリンダ体の内周面との間の隙間により、吸引操作弁がシリンダ体内に押し込まれていない待機状態の時に外部吸引装置に吸引される外気が通過する縦向き穴状流路が形成されると共に、縦向き穴状流路の入口側に隣接してそれよりシリンダ体の開口端寄りの位置には吸引操作弁を径方向に貫通する横向き穴状流路が形成され、待機状態のときには、吸引元管内に吸引される外気が横向き穴状流路内をシリンダ体の軸線方向に通ったあと横向き穴状流路の底面にぶつかってから縦向き穴状流路に流れ込むように構成された内視鏡の吸引操作装置において、縦向き穴状流路の入口を臨む横向き穴状流路の底面の縁部が、縦向き穴状流路側に斜行した斜面にされていて、待機状態のときに横向き穴状流路を通過して縦向き穴状流路に流入する外気が、横向き穴状流路と縦向き穴状流路との境界部において斜面に沿って流れるようにしたものである。   In order to achieve the above object, an endoscope suction operation device according to the present invention is disposed in an operation portion of an endoscope, and is inserted with a suction source tube and an endoscope communicating with an external suction device that is continuously operated. A suction operation valve that is operated to be pushed in the axial direction from the opening end side of the cylinder body is arranged in the cylinder body connected to the suction pipe that opens at the tip of the section, and the outer peripheral surface of the suction operation valve and the inner peripheral surface of the cylinder body The vertical hole-shaped flow path through which the outside air sucked into the external suction device passes when the suction operation valve is not pushed into the cylinder body is formed by the gap between the A horizontal hole-like flow passage that penetrates the suction operation valve in the radial direction is formed at a position adjacent to the inlet side of the passage and closer to the opening end of the cylinder body, and is sucked into the suction source pipe in the standby state. Axis of cylinder body in outside air channel with outside air In the endoscope suction operation device configured to flow into the vertical hole-shaped flow path after hitting the bottom surface of the horizontal hole-shaped flow path after passing through the horizontal direction, the horizontal hole facing the inlet of the vertical hole-shaped flow path The edge of the bottom surface of the channel is a slope inclined to the side of the vertical hole channel, and outside air that flows into the vertical hole channel through the horizontal hole channel in the standby state However, it is made to flow along the slope at the boundary between the horizontally oriented hole-shaped flow path and the vertically oriented hole-shaped flow path.

なお、斜面がシリンダ体の軸線方向に対してなす角度（θ）が４０°±１５°であってもよい。   The angle (θ) formed by the inclined surface with respect to the axial direction of the cylinder body may be 40 ° ± 15 °.

本発明によれば、縦向き穴状流路の入口を臨む横向き穴状流路の底面の縁部が、縦向き穴状流路側に斜行した斜面にされていて、待機状態のときに横向き穴状流路を通過して縦向き穴状流路に流入する外気が、横向き穴状流路と縦向き穴状流路との境界部において斜面に沿って流れることにより、外気が吸引される吸引路の通過抵抗が従来より大幅に小さくなり、その結果、押し込み操作力量が小さくて操作性がよく、しかも装置を大型化することなく、いわゆる自然吸引が発生しない優れた機能を備えることができる。   According to the present invention, the edge of the bottom surface of the horizontal hole-shaped channel facing the inlet of the vertical hole-shaped channel is formed as a slope inclined to the side of the vertical hole-shaped channel, and is horizontally oriented in the standby state. The outside air that flows through the hole-like channel and flows into the vertically-like hole-like channel flows along the inclined surface at the boundary between the horizontally-oriented hole-like channel and the vertically-oriented hole-like channel, thereby sucking the outside air. The passage resistance of the suction path is significantly smaller than before, and as a result, the pushing operation force amount is small, the operability is good, and an excellent function that does not cause so-called natural suction can be provided without increasing the size of the apparatus. .

本発明の実施例に係る内視鏡の吸引操作装置における待機状態の側面断面図（図３におけるＩ−Ｉ断面図）である。It is side surface sectional drawing (II sectional drawing in FIG. 3) of the standby state in the suction operation apparatus of the endoscope which concerns on the Example of this invention. 本発明の実施例に係る内視鏡の全体構成図である。1 is an overall configuration diagram of an endoscope according to an embodiment of the present invention. 本発明の実施例に係る内視鏡の吸引操作装置における待機状態の正面半断面図である。It is a front half sectional view of the waiting state in the suction operation device of an endoscope concerning the example of the present invention. 本発明の実施例に係る内視鏡の吸引操作装置の図３におけるIV−IV断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 3 of the endoscope suction operation apparatus according to the embodiment of the present invention. 本発明の実施例に係る内視鏡の吸引操作装置における吸引状態の正面半断面図である。It is a front half sectional view of the suction state in the suction operation device of the endoscope according to the embodiment of the present invention. 本発明の実施例に係る内視鏡の吸引操作装置の部分ユニットの、正面と左側面との中間方向から見た状態の図である。It is the figure of the state seen from the intermediate direction of the front and left side of the partial unit of the suction operation apparatus of the endoscope which concerns on the Example of this invention. 本発明の実施例に係る内視鏡の吸引操作装置の図６におけるVII−VII断面図）である。FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6 of the endoscope suction operation device according to the embodiment of the present invention. 従来の内視鏡の吸引操作装置における待機状態の正面半断面図である。It is a front half sectional view of the waiting state in the suction operation device of the conventional endoscope. 改良検討を行った吸引操作装置における待機状態の側面断面図である。It is side surface sectional drawing of the standby state in the suction operation apparatus which examined improvement.

以下、図面を参照して本発明の実施例を説明する。
図２は、内視鏡の全体構成を示しており、操作部１に基端が連結された可撓性の挿入部２の先端に、図示されていない観察窓や照明窓等と並んで吸引口３が開口形成されている。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 2 shows the overall configuration of the endoscope. At the distal end of a flexible insertion portion 2 whose base end is connected to the operation portion 1, suction is performed along with an observation window, an illumination window, etc. not shown. An opening 3 is formed.

挿入部２内には、吸引口３に連通する吸引管４が全長にわたって挿通配置されており、吸引管４の基端は、操作部１に配置された吸引操作装置１０に接続されている。また、連続運転される外部吸引装置５と吸引操作装置１０との間が吸引元管６によって接続されており、吸引操作装置１０を切り替え操作することにより、体内汚液等を吸引口３から外部吸引装置５に任意に吸引排出させることができる。   A suction tube 4 communicating with the suction port 3 is inserted and disposed in the insertion portion 2 over its entire length, and a proximal end of the suction tube 4 is connected to a suction operation device 10 disposed in the operation portion 1. In addition, the external suction device 5 and the suction operation device 10 that are continuously operated are connected by the suction source tube 6, and by operating the switching operation of the suction operation device 10, internal sewage and the like are externally supplied from the suction port 3. The suction device 5 can be arbitrarily sucked and discharged.

図３は、待機状態にある吸引操作装置１０の半断面図である。１１は、一端が操作部１の外面に開口配置されたシリンダ体であり、大半の部分が操作部１内に配置されていている。シリンダ体１１には、吸引元管６と吸引管４とが各々接続されている。   FIG. 3 is a half sectional view of the suction operation device 10 in a standby state. Reference numeral 11 denotes a cylinder body having one end opened on the outer surface of the operation unit 1, and most of the part is arranged in the operation unit 1. A suction source pipe 6 and a suction pipe 4 are connected to the cylinder body 11.

シリンダ体１１内には、その開口端側から軸線方向に押し込み操作されるピストン状の吸引操作弁１２が軸線方向にスライド自在に配置されている。なお、各図においては、シリンダ体１１と吸引操作弁１２の断面のみに斜線を施してある。   In the cylinder body 11, a piston-like suction operation valve 12 that is pushed in from the opening end side in the axial direction is disposed so as to be slidable in the axial direction. In each figure, only the cross section of the cylinder body 11 and the suction operation valve 12 is hatched.

シリンダ体１１の開口端から外方に突出する吸引操作弁１２の突端には、押し込み操作ボタン１３が取り付けられている。１４は、吸引操作弁１２と押し込み操作ボタン１３を、押し込み操作された状態から待機状態に戻すための圧縮コイルスプリング、１５は、圧縮コイルスプリング１４の周囲を囲んで配置されたかざり環である。   A push-in operation button 13 is attached to the projecting end of the suction operation valve 12 projecting outward from the opening end of the cylinder body 11. 14 is a compression coil spring for returning the suction operation valve 12 and the push-in operation button 13 from the pushed-in state to the standby state, and 15 is a ring around the periphery of the compression coil spring 14.

待機状態の時に吸引元管６を経て外部吸引装置５に吸引される外気が通過する縦向き穴状流路１６が、吸引操作弁１２の外周面とシリンダ体１１の内周面との間の隙間により形成されている。「縦向き」とは、シリンダ体１１の軸線方向の意である。   A vertical hole-like flow path 16 through which the outside air sucked into the external suction device 5 through the suction source pipe 6 passes during the standby state is between the outer peripheral surface of the suction operation valve 12 and the inner peripheral surface of the cylinder body 11. It is formed by a gap. “Vertical orientation” means the axial direction of the cylinder body 11.

図４は、図３におけるIV−IV断面図であり、縦向き穴状流路１６の断面形状（軸線に対して垂直をなす断面の形状）が図示されている。各図に示される１７は、後述する吸引状態の時に吸引元管６と吸引管４とを連通させるために吸引操作弁１２に形成された吸引連通孔１７である。図３に示されるように、吸引連通孔１７の側面開口端にはシール材の類が取り付けられていない。   FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3, and shows a cross-sectional shape (a cross-sectional shape perpendicular to the axis) of the vertically oriented hole-like channel 16. Reference numeral 17 shown in each figure denotes a suction communication hole 17 formed in the suction operation valve 12 for connecting the suction source pipe 6 and the suction pipe 4 in a suction state to be described later. As shown in FIG. 3, a kind of sealing material is not attached to the side opening end of the suction communication hole 17.

縦向き穴状流路１６の入口側に隣接して、それよりシリンダ体１１の開口端寄り（即ち、図３において上方）の位置には、吸引操作弁１２を径方向に貫通する横向き穴状流路１８が形成されている。図３に示されるように、横向き穴状流路１８の断面形状は、軸線方向（即ち、シリンダ体１１の軸線方向）に細長い長円形状に形成されている。   Adjacent to the inlet side of the vertical hole-shaped flow path 16 and at a position closer to the opening end of the cylinder body 11 (that is, upward in FIG. 3), a horizontal hole shape that penetrates the suction operation valve 12 in the radial direction. A flow path 18 is formed. As shown in FIG. 3, the cross-sectional shape of the lateral hole-shaped flow path 18 is formed in an oval shape elongated in the axial direction (that is, the axial direction of the cylinder body 11).

その結果、待機状態においては、外気が、押し込み操作ボタン１３とその周辺の部材などの隙間を通り、横向き穴状流路１８から縦向き穴状流路１６を経て吸引元管６に常時吸引される。   As a result, in the standby state, outside air is constantly sucked from the horizontal hole-shaped flow path 18 through the vertical hole-shaped flow path 16 to the suction source pipe 6 through the gap between the push-in operation button 13 and its peripheral members. The

図５に示されるように、押し込み操作ボタン１３が押し込み操作されると、圧縮コイルスプリング１４が圧縮されて吸引操作弁１２がシリンダ体１１内でスライドし、吸引元管６と吸引管４とが吸引連通孔１７を介して連通し、挿入部２の先端の吸引口３から吸引が行われる。   As shown in FIG. 5, when the push-in operation button 13 is pushed in, the compression coil spring 14 is compressed and the suction operation valve 12 slides in the cylinder body 11 so that the suction source pipe 6 and the suction pipe 4 are connected. The suction communication hole 17 communicates and suction is performed from the suction port 3 at the distal end of the insertion portion 2.

図６は、シリンダ体１１から抜き出された状態の吸引操作弁１２を示している。吸引操作弁１２の頭部には、押し込み操作ボタン１３やかざり環１５が取り付けられていて、それらが一つのユニットになっている。   FIG. 6 shows the suction operation valve 12 extracted from the cylinder body 11. A push-in operation button 13 and a ring 15 are attached to the head of the suction operation valve 12, and they constitute a single unit.

吸引操作弁１２に形成されている横向き穴状流路１８は、VII−VII断面を図示する図７にも示されるように、縦向き穴状流路１６の入口を臨む底面１８ａの縁部が、縦向き穴状流路１６側に斜行した斜面１８ｂにされている。斜面１８ｂが底面１８ａに占める割合は、５０％程度で十分であるが、後述する効果を十分に得るためには２５％〜１００％の範囲であればよい。   As shown in FIG. 7 illustrating the VII-VII cross section, the lateral hole 18 formed in the suction operation valve 12 has an edge of the bottom surface 18a facing the inlet of the vertical hole 16. The inclined surface 18b is inclined toward the longitudinal hole-like flow channel 16 side. The ratio of the inclined surface 18b to the bottom surface 18a is about 50%. However, in order to sufficiently obtain the effects described later, it may be in the range of 25% to 100%.

その斜面１８ｂが吸引操作弁１２の軸線方向（即ち、シリンダ体１１の軸線方向）に対してなす角度θは２５°〜５５°の範囲（言い換えると４０°±１５°）である。その理由は、５５°より大きいと、後述する本発明の効果が小さくなり、２５°より小さいと、その必要性が乏しいにもかかわらず吸引操作弁１２を長くせざるを得なくなって、装置が大型化する可能性があるからである。   The angle θ formed by the inclined surface 18b with respect to the axial direction of the suction operation valve 12 (that is, the axial direction of the cylinder body 11) is in the range of 25 ° to 55 ° (in other words, 40 ° ± 15 °). The reason is that if it is larger than 55 °, the effect of the present invention to be described later is reduced, and if it is smaller than 25 °, the suction operation valve 12 has to be lengthened in spite of the lack of necessity. This is because the size may increase.

図１は、図３におけるＩ−Ｉ断面図であり、待機状態において、横向き穴状流路１８から縦向き穴状流路１６を通過する外気の流れを、コンピュータ解析によりシミュレーションした結果を図示したものである。   FIG. 1 is a cross-sectional view taken along the line II in FIG. 3, and illustrates the result of simulation by computer analysis of the flow of outside air passing from the horizontal hole-shaped flow path 18 to the vertical hole-shaped flow path 16 in the standby state. Is.

押し込み操作ボタン１３とその周辺の部材などの隙間から吸い込まれた外気は、横向き穴状流路１８内をシリンダ体１１の軸線方向に通ったあと、横向き穴状流路１８の底面１８ａにぶつかってから縦向き穴状流路１６に流れ込み、空気の流れが、横向き穴状流路１８の底面１８ａ付近の領域で縦向き穴状流路１６の入口方向に向きを変える。   The outside air sucked from the gap between the push-in operation button 13 and its surrounding members passes through the lateral hole-shaped channel 18 in the axial direction of the cylinder body 11 and then hits the bottom surface 18a of the lateral hole-shaped channel 18. The air flows into the vertical hole-shaped flow path 16 and the direction of the air changes in the direction of the inlet of the vertical hole-shaped flow path 16 in the region near the bottom surface 18 a of the horizontal hole-shaped flow path 18.

しかし、縦向き穴状流路１６の入口を臨む横向き穴状流路１８の底面１８ａの縁部が、縦向き穴状流路１６側に斜行した斜面１８ｂにされていることにより、横向き穴状流路１８を通過して縦向き穴状流路１６に流入する外気の多くが、横向き穴状流路１８と縦向き穴状流路１６との境界部において斜面１８ｂに沿う方向に流れる。   However, the edge of the bottom surface 18a of the horizontal hole-shaped channel 18 that faces the inlet of the vertical hole-shaped channel 16 is formed as a slope 18b that is skewed toward the vertical hole-shaped channel 16, so that the horizontal hole Most of the outside air that passes through the vertical channel 18 and flows into the vertical hole-shaped channel 16 flows in a direction along the inclined surface 18 b at the boundary between the horizontal hole-shaped channel 18 and the vertical hole-shaped channel 16.

したがって、従来のように空気流が吸引操作弁１２の表面から剥離したかのような空気流のデッドスペースが発生せず、この領域において空気流の実質的な流路断面積がほとんど狭められない。   Therefore, the dead space of the air flow does not occur as if the air flow is separated from the surface of the suction operation valve 12 as in the prior art, and the substantial flow path cross-sectional area of the air flow is hardly reduced in this region. .

その結果、外気が吸引される吸引路の通過抵抗が従来より大幅に小さくなり、待機状態における自然吸引が発生しない。そして、自然吸引発生防止のためのシール部材等が不要なので、押し込み操作ボタン１３の操作力量が小さくて操作性がよく、吸引操作装置１０を大型化する必要もない。   As a result, the passage resistance of the suction path through which outside air is sucked is significantly smaller than before, and natural suction in the standby state does not occur. Further, since a seal member or the like for preventing the occurrence of natural suction is unnecessary, the operation force amount of the push-in operation button 13 is small, the operability is good, and the suction operation device 10 does not need to be enlarged.

なお、本発明は上記実施例に限定されるものではなく、図示されていない各種の実施態様を含むものである。   In addition, this invention is not limited to the said Example, The various embodiment which is not shown in figure is included.

１ 操作部
２ 挿入部
３ 吸引口
４ 吸引管
５ 外部吸引装置
６ 吸引元管
１０ 吸引操作装置
１１ シリンダ体
１２ 吸引操作弁
１３ 押し込み操作ボタン
１４ 圧縮コイルスプリング
１６ 縦向き穴状流路
１８ 横向き穴状流路
１８ａ 底面
１８ｂ 斜面 DESCRIPTION OF SYMBOLS 1 Operation part 2 Insertion part 3 Suction port 4 Suction pipe 5 External suction device 6 Suction source pipe 10 Suction operation apparatus 11 Cylinder body 12 Suction operation valve 13 Push-in operation button 14 Compression coil spring 16 Vertical hole-shaped flow path 18 Horizontal hole shape Channel 18a Bottom 18b Slope

本発明の実施例に係る内視鏡の吸引操作装置における待機状態の側面断面図（図３におけるＩ−Ｉ断面図）である。It is side surface sectional drawing (II sectional drawing in FIG. 3) of the standby state in the suction operation apparatus of the endoscope which concerns on the Example of this invention. 本発明の実施例に係る内視鏡の全体構成図である。1 is an overall configuration diagram of an endoscope according to an embodiment of the present invention. 本発明の実施例に係る内視鏡の吸引操作装置における待機状態の正面半断面図である。It is a front half sectional view of the waiting state in the suction operation device of an endoscope concerning the example of the present invention. 本発明の実施例に係る内視鏡の吸引操作装置の図３におけるIV−IV断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 3 of the endoscope suction operation apparatus according to the embodiment of the present invention. 本発明の実施例に係る内視鏡の吸引操作装置における吸引状態の正面半断面図である。It is a front half sectional view of the suction state in the suction operation device of the endoscope according to the embodiment of the present invention. 本発明の実施例に係る内視鏡の吸引操作装置の部分ユニットの、正面と左側面との中間方向から見た状態の図である。It is the figure of the state seen from the intermediate direction of the front and left side of the partial unit of the suction operation apparatus of the endoscope which concerns on the Example of this invention. 本発明の実施例に係る内視鏡の吸引操作装置の図６におけるVII−VII断面図である。FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 6 of the endoscope suction operation apparatus according to the embodiment of the present invention. 従来の内視鏡の吸引操作装置における待機状態の正面半断面図である。It is a front half sectional view of the waiting state in the suction operation device of the conventional endoscope. 改良検討を行った吸引操作装置における待機状態の側面断面図である。It is side surface sectional drawing of the standby state in the suction operation apparatus which examined improvement.

Claims (2)

内視鏡の操作部に配置されて、連続運転される外部吸引装置に連通する吸引元管と内視鏡の挿入部先端に開口する吸引管とが接続されたシリンダ体内に、上記シリンダ体の開口端側から軸線方向に押し込み操作される吸引操作弁が配置され、上記吸引操作弁の外周面と上記シリンダ体の内周面との間の隙間により、上記吸引操作弁が上記シリンダ体内に押し込まれていない待機状態の時に上記外部吸引装置に吸引される外気が通過する縦向き穴状流路が形成されると共に、上記縦向き穴状流路の入口側に隣接してそれより上記シリンダ体の開口端寄りの位置には上記吸引操作弁を径方向に貫通する横向き穴状流路が形成され、上記待機状態のときには、上記吸引元管内に吸引される外気が上記横向き穴状流路内を上記シリンダ体の軸線方向に通ったあと上記横向き穴状流路の底面にぶつかってから上記縦向き穴状流路に流れ込むように構成された内視鏡の吸引操作装置において、
上記縦向き穴状流路の入口を臨む上記横向き穴状流路の底面の縁部が、上記縦向き穴状流路側に斜行した斜面にされていて、上記待機状態のときに上記横向き穴状流路を通過して上記縦向き穴状流路に流入する外気が、上記横向き穴状流路と上記縦向き穴状流路との境界部において上記斜面に沿って流れることを特徴とする内視鏡の吸引操作装置。 In the cylinder body, which is disposed in the operation section of the endoscope and is connected to a suction source pipe communicating with an external suction device that is continuously operated and a suction pipe that opens at the distal end of the insertion section of the endoscope, A suction operation valve that is pushed in the axial direction from the opening end side is disposed, and the suction operation valve is pushed into the cylinder body by a gap between the outer peripheral surface of the suction operation valve and the inner peripheral surface of the cylinder body. A vertical hole-shaped flow path through which the outside air sucked into the external suction device passes is formed in a non-standby state, and is adjacent to the inlet side of the vertical hole-shaped flow path and further from the cylinder body A lateral hole-like channel that penetrates the suction operation valve in the radial direction is formed at a position near the opening end of the gas, and in the standby state, the outside air sucked into the suction source pipe is in the horizontal hole-like channel. In the axial direction of the cylinder body In the suction operation device configured endoscope to flow into the vertical hole shape flow path from hit the bottom after the lateral hole-shaped flow path Tsu,
The edge of the bottom surface of the horizontal hole-shaped channel facing the inlet of the vertical hole-shaped channel is a slope inclined to the vertical hole-shaped channel side, and the horizontal hole is in the standby state. Outside air flowing into the vertical hole-shaped flow path through the cylindrical flow path flows along the slope at the boundary between the horizontal hole-shaped flow path and the vertical hole-shaped flow path. Endoscopic suction operation device. 上記斜面が上記シリンダ体の軸線方向に対してなす角度（θ）が４０°±１５°である請求項１記載の内視鏡の吸引操作装置。   2. The endoscope suction operation device according to claim 1, wherein an angle (θ) formed by the inclined surface with respect to the axial direction of the cylinder body is 40 ° ± 15 °.
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Publication number Priority date Publication date Assignee Title
JP6125134B1 (en) * 2016-02-29 2017-05-10 オリンパス株式会社 Pipe line control device
WO2017149828A1 (en) * 2016-02-29 2017-09-08 オリンパス株式会社 Conduit control apparatus

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JPH03122801U (en) * 1990-03-28 1991-12-13
JPH08252216A (en) * 1995-03-17 1996-10-01 Asahi Optical Co Ltd Suction pipeline switching device for endoscope
JP2004223121A (en) * 2003-01-27 2004-08-12 Fuji Photo Optical Co Ltd Duct switching valve of endoscope
US20060041190A1 (en) * 2004-08-20 2006-02-23 Pentax Corporation Operation button for endoscope

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JPH03122801U (en) * 1990-03-28 1991-12-13
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JP2004223121A (en) * 2003-01-27 2004-08-12 Fuji Photo Optical Co Ltd Duct switching valve of endoscope
US20060041190A1 (en) * 2004-08-20 2006-02-23 Pentax Corporation Operation button for endoscope

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Publication number Priority date Publication date Assignee Title
JP6125134B1 (en) * 2016-02-29 2017-05-10 オリンパス株式会社 Pipe line control device
WO2017149828A1 (en) * 2016-02-29 2017-09-08 オリンパス株式会社 Conduit control apparatus
US10314466B2 (en) 2016-02-29 2019-06-11 Olympus Corporation Conduit control device

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