JP4056760B2 - Suction switching mechanism of an endoscope - Google Patents

Suction switching mechanism of an endoscope Download PDF

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JP4056760B2
JP4056760B2 JP2002045905A JP2002045905A JP4056760B2 JP 4056760 B2 JP4056760 B2 JP 4056760B2 JP 2002045905 A JP2002045905 A JP 2002045905A JP 2002045905 A JP2002045905 A JP 2002045905A JP 4056760 B2 JP4056760 B2 JP 4056760B2
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suction
channel
treatment instrument
portion
instrument insertion
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JP2003245247A (en
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隆之 荻野
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ペンタックス株式会社
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【0001】 [0001]
【技術分野】 【Technical field】
本発明は、内視鏡の吸引切替機構に関する。 The present invention relates to a suction switching mechanism of the endoscope.
【0002】 [0002]
【従来技術及びその問題点】 BACKGROUND OF THE INVENTION
医療用内視鏡で吸引を行う際に、誤って吸引対象でない体内組織を吸引してしまい、陰圧が粘膜に直接に作用することがある。 When performing suction in a medical endoscope, will be sucked through the body tissue non accidentally aspirated, negative pressure may act directly on the mucosa. このとき吸引力が大きいと粘膜部分が出血したり、いわゆる吸引ダコが生じるおそれがある。 At this time or greater with the mucosal portion attraction is bleeding, there is a possibility that the so-called suction octopus occurs. 出血が起こると病変部の診断が難しくなり、また吸引ダコはポリープとの区別がつきにくいため、いずれの場合も検査に支障をきたす。 Bleeding diagnosis of the lesion is difficult and takes place, also suction octopus because it difficult to distinguish between the polyp, in any case interfere with the inspection.
【0003】 [0003]
特に、吸引チャンネルとしても使用可能な処置具挿通チャンネルを2つ備え、この2つのチャンネルの間に吸引源との連通状態を切り替える流路切替弁を備えたいわゆる2チャンネル式の内視鏡では、流路切替弁によりいずれか一方のチャンネルの吸引力を遮断したときに、他方のチャンネルに作用する吸引力が過大にならないようにすることが望まれている。 In particular, also comprises two treatment instrument insertion channel can be used as a suction channel, the endoscope so-called two-channel type having a flow path switching valve for switching the communicating state between the suction source between the two channels, when blocked the attraction of one of the channels by the channel switching valve, suction force acting on the other channel is desired to be prevented from becoming excessive.
【0004】 [0004]
【発明の目的】 SUMMARY OF THE INVENTION
本発明は、処置具挿通チャンネルによる過度吸引を防ぐことが可能な内視鏡の吸引切替機構を提供することを目的とする。 The present invention aims to provide a suction switching mechanism of an endoscope that can prevent excessive suction by the treatment instrument insertion channel.
【0005】 [0005]
【発明の概要】 SUMMARY OF THE INVENTION
本発明の内視鏡の吸引切替機構は、吸引源; 一対の処置具挿通チャンネル;一対の処置具挿通チャンネルを周方向の異なる位置に連通させる円筒状の内周面を有し、かつ吸引源に連通する連通空間;この連通空間の円筒状内周面に摺接する円筒状外周面を有し、連通空間の内周面に沿う回動により、吸引源を一対の処置具挿通チャンネルの何れか一方に切替連通させる二つの片方連通状態と、吸引源を一対の処置具挿通チャンネルの双方に連通させる双方連通状態とに切替動作可能な流路切替弁;及び、この流路切替弁が二つの片方連通状態のそれぞれにあるとき、吸引源に連通している一方の処置具連通チャンネルとは別の他方の処置具挿通チャンネルを、該一方の処置具挿通チャンネルと吸引源との連通面積より小さい連通面積で吸引源 Suction switching mechanism of the endoscope of the present invention, suction source; a pair of treatment instrument insertion channel; has a cylindrical inner circumferential surface for communicating the pair of treatment instrument insertion channel in the circumferential direction at different positions, and suction source communication space communicating with; has a cylindrical outer peripheral surface in sliding contact with the cylindrical inner peripheral surface of the communication space, by rotation along the inner circumferential surface of the communication space, either a suction source of the pair of treatment instrument insertion channel on the other hand, the two one communication state to communicate switched communication, the source of suction can be switched operated on with both communication with communicating with both of the pair of treatment instrument insertion channel of the flow path switching valve; and the flow path switching valve of two when in each one communicating state, another other treatment instrument insertion channel and one of the treatment instrument communicating channel communicating with the suction source than the area of communication between the suction source and the one treatment instrument insertion channel the suction source with a small communicating area 連通させる、流路切替弁の外周面の周方向の両端部に形成した一対の凹部よりなる吸引力調整流路;を備えたことを特徴としている。 Is characterized by having a; communicating, suction force adjustment channel consisting of a pair of recesses formed on both end portions in the circumferential direction of the outer peripheral surface of the flow path switching valve.
【0006】 [0006]
上記の片方連通状態において、吸引源に完全に連通している一方の処置具挿通チャンネルと吸引源との連通面積を100としたとき、他方の処置具挿通チャンネルにおける吸引源との連通面積は5〜10であることが望ましい。 In one communication state described above, when the communication area of ​​the one treatment instrument insertion channel that is completely communicated with the suction source and the suction source 100, the communication area between the suction source in the other treatment instrument insertion channel 5 it is desirable that the 10.
【0009】 [0009]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
図1は、本発明を適用した内視鏡全体の外観を示している。 Figure 1 shows an endoscopic overall appearance according to the present invention. この内視鏡は、内視鏡操作者が把持する把持操作部11、観察対象内に挿入される挿入部12、該挿入部12と把持操作部11を接続する連結部13、把持操作部11から延出されたユニバーサルチューブ14を有している。 The endoscope, grasping the operation portion 11 which is the endoscope operator grips the insertion portion 12 inserted into the observation target, connecting portion 13 which connects the insertion portion 12 and the gripping operation unit 11, the gripping operation unit 11 and a universal tube 14 extending from. 挿入部12は、先端部12a、湾曲操作可能な湾曲部12b、及び可撓性を有する可撓管部12cからなる。 The insertion portion 12 is composed of a tip portion 12a, a bending operation can bend 12b, and a flexible tube portion 12c having flexibility. ユニバーサルチューブ14の端部は、図示しないプロセッサに対して着脱可能なコネクタ15となっている。 End of the universal tube 14 has a detachable connector 15 to a processor (not shown).
【0010】 [0010]
図2に示すように、挿入部12内には2本の処置具挿通チャンネル20A、20Bが配設されており、各処置具挿通チャンネル20A、20Bの出口部が先端部12aに形成されている。 As shown in FIG. 2, two treatment instrument insertion channel 20A is in the insertion portion 12, 20B are arranged, each of the treatment instrument insertion channel 20A, outlet 20B, is formed at the tip end portion 12a . 一方、連結部13に設けた処置具挿入口突起21には、処置具挿通チャンネル20A、20Bの入口部が形成されている。 On the other hand, the connecting portion 13 the treatment instrument insertion opening protrusion 21 provided on the treatment instrument insertion channel 20A, the inlet portion of the 20B is formed. 処置具挿入口突起21内には処置具挿通チャンネル20Aと処置具挿通チャンネル20Bを連通させる連通空間22(図3参照)が形成されており、連通空間22には吸引チャンネル23が接続している。 Communicating space 22 in the treatment instrument insertion opening protrusion 21 which communicates the treatment instrument insertion channel 20B and the treatment instrument insertion channel 20A (see FIG. 3) and is formed, the suction channel 23 is connected to the communication space 22 . 吸引チャンネル23の途中には吸引シリンダ24が設けられており、吸引チャンネル23はさらに、吸引シリンダ24からユニバーサルチューブ14内に延設されてコネクタ15に突設した吸引ニップル25(図2)に開口している。 In the middle of the suction channel 23 is suction cylinder 24 is provided, the suction channel 23 further has an opening to the suction nipple 25 (FIG. 2) that extends from the suction cylinder 24 to the universal tube 14 projecting from the connector 15 doing. 吸引ニップル25には吸引ポンプ(吸引源)27から延設されたチューブが着脱可能であり、吸引ポンプを作動させることによって吸引チャンネル23に陰圧をかけることができる。 The suction nipple 25 is a tube extending from a suction pump (suction source) 27 is detachably, it is possible to apply negative pressure to the suction channel 23 by operating the suction pump. 吸引シリンダ24には、把持操作部11の外面に突出する吸引ボタン26が進退可能に支持されており、吸引ボタン26を押圧しない状態では、吸引シリンダ24を挟んで位置するユニバーサルチューブ14側の吸引チャンネル23と連通空間22側の吸引チャンネル23は、該吸引ボタン26のピストンよって遮断され、連通空間22には陰圧が作用しない。 The suction cylinder 24 has a suction button 26 which projects to the outer surface of the gripping operation unit 11 is supported so as to be retractable, in a state where no pressing the suction button 26, the suction of the universal tube 14 side located across the suction cylinder 24 channel 23 communicates with the space 22 side of the suction channel 23 is blocked by the piston of the suction button 26, negative pressure is not acted on the communication space 22. この状態では、吸引ボタン26の頂部に形成した開口から外気が吸引される。 In this state, the outside air is sucked from an opening formed in the top of the suction button 26. 一方、吸引ボタン26の頂部開口を塞ぎながら吸引ボタン26を押圧すると、この遮断が解除されて連通空間22側に陰圧が作用する。 On the other hand, when pressing the suction button 26 while closing the top opening of the suction button 26, a negative pressure is applied to the communication space 22 side this blocking is released.
【0011】 [0011]
図3に示すように、処置具挿入口突起21内に設けたチャンネル接続部材30には、処置具挿通チャンネル20Aと処置具挿通チャンネル20Bに連通する一対の中空管路(処置具挿通チャンネル)31A、31Bが形成されている。 As shown in FIG. 3, the channel connection member 30 provided on the treatment instrument insertion opening protrusion 21, a pair of hollow conduit which communicates with the treatment instrument insertion channel 20B and the treatment instrument insertion channel 20A (the treatment instrument insertion channel) 31A, 31B are formed. 詳細には、処置具挿通チャンネル20Aと処置具挿通チャンネル20Bの端部に固定した硬質の中継チューブ32A、32Bが、固定枠33を介してチャンネル接続部材30に接続され、該中継チューブ32A及び32Bと固定枠33に形成された流路が中空管路31Aと中空管路31Bに連通する。 Specifically, the relay tube 32A of rigid and fixed to the end of the treatment instrument insertion channel 20B and the treatment instrument insertion channel 20A, 32B is connected to the channel connection member 30 via the fixing frame 33, the relay tube 32A and 32B channel formed in the fixed frame 33 and communicates with the hollow pipe 31A and the hollow conduit 31B. また、中空管路31Aと中空管路31Bの出口部にはそれぞれ、中空筒状の口金固定部材34A、34Bが固定されており、各口金固定部材34A、34Bに対して、ねじを介して筒状の口金突起35A、35Bが固着されている。 Further, each of the outlet portion of the hollow pipe line 31A and the hollow conduit 31B, a hollow cylindrical cap fixing members 34A, 34B are secured, each die stationary member 34A, with respect 34B, via screws cylindrical die projections 35A, 35B are fixed Te. 口金突起35A、35Bが実質的に処置具挿通チャンネル20A、20Bの入口部を構成しており、それぞれの処置具挿通チャンネル20A、20Bには、処置具を挿入することができる。 Cap projections 35A, 35B are configured substantially the treatment instrument insertion channel 20A, the inlet portion of 20B, each of the treatment instrument insertion channel 20A, the 20B, it is possible to insert a treatment tool. 口金突起35A及び35Bとチャンネル接続部材30の間には、絶縁材料からなる口金固定部材34A、34Bとゴムカバー36が挟着されており、絶縁性を有するこれらの部材によって、金属材料からなるチャンネル接続部材30が処置具挿入口突起21の外面に露出することを防いでいる。 Between the spinneret projections 35A and 35B and the channel connection member 30, cap fixing member 34A made of an insulating material, 34B and the rubber cover 36 are sandwiched by these members having an insulating property, a metal material channel connecting member 30 is prevented from being exposed to the outer surface of the instrument inlet projection 21. また、口金突起35A、35Bには、鉗子栓39A、39B(図1)を着脱可能である。 Further, the mouthpiece projections 35A, the 35B, is removable forceps plug 39A, 39B (FIG. 1).
【0012】 [0012]
チャンネル接続部材30にはさらに、中空管路31Aと中空管路31Bの間に前述の連通空間22が形成されている。 Further the channel connection member 30, the communication space 22 of the aforementioned between the hollow pipe 31A and the hollow pipe 31B is formed. 図3及び図5に示すように、連通空間22は円筒状の内周面を有しており、この内周面の周方向に位置を異ならせて開口する一対の径方向連通路41A、41Bが形成されている。 As shown in FIGS. 3 and 5, the communication space 22 is cylindrical and has an inner peripheral surface, a pair of radial direction communicating channel 41A which opens at different positions in the circumferential direction of the inner peripheral surface, 41B There has been formed. 径方向連通路41Aは中空管路31Aに、径方向連通路41Bは中空管路31Bに、それぞれ連通している。 The radial direction communicating channel 41A to the hollow pipe 31A, the radial direction communicating channel 41B to the hollow pipe 31B, and communicates respectively. 図5に示すように、連通空間22の底部はチャンネル接続部材30を貫通する開口となっており、この開口部に吸引チャンネル23が接続している。 As shown in FIG. 5, the bottom of the communicating space 22 is an opening extending through the channel connection member 30, suction channel 23 is connected to the opening.
【0013】 [0013]
図4及び図5に示すように、チャンネル接続部材30において連通空間22の上方は内視鏡外面に向けて突出する円筒状突起として形成されており、処置具挿入口突起21にはこの円筒状突起を外方に突出させる円形開口が形成されている。 As shown in FIGS. 4 and 5, the upper part of the communication space 22 in the channel connection member 30 is formed as a cylindrical projection projecting toward the endoscope outer surface, the instrument inlet projection 21 the cylindrical circular opening to project a projection outward is formed. 該円形開口の縁部には環状のフランジ凸部37が形成され、該フランジ凸部37の外縁部の一部を切除して回転規制凹部38が形成されている。 The edge of the circular opening is formed annular flange projection 37, the rotation restricting recess 38 is formed by cutting a part of the outer edge of the flange projection 37.
【0014】 [0014]
処置具挿入口突起21から突出するチャンネル接続部材30の円筒状突起の内側は、連通空間22に連続する中空状の弁部材挿入空間42となっている。 Inner cylindrical projection of the channel connection member 30 projecting from the treatment instrument insertion opening projection 21 has a hollow valve member insertion space 42 continuous with the communication space 22. 弁部材挿入空間42は連通空間22よりも内径が大きく、該連通空間22と弁部材挿入空間42の間に環状の弁部材挿入規制面43が形成されている。 The valve member insertion space 42 is larger inner diameter than the communication space 22, annular valve member insertion restricting surface 43 between the communicating space 22 and the valve member insertion space 42 is formed. また、チャンネル接続部材30の円筒状突起の外周面側には、上端側から順に、周方向へのスナップリング係合環部44(図5)と、環状の取付環挿入規制面45と、Oリング46を保持するためのOリング保持溝47が形成されている。 Further, the outer circumferential surface of the cylindrical projection of the channel connection member 30 has, in order from the top side, the snap ring Kakarigowa portion 44 in the circumferential direction (FIG. 5), an annular mounting ring insertion restricting surface 45, O O-ring holding groove 47 for holding the ring 46 is formed. 図5のようにチャンネル接続部材30を処置具挿入口突起21に取り付ると、Oリング保持溝47がフランジ凸部37の内周側まで挿入され、処置具挿入口突起21とチャンネル接続部材30の間はOリング46によって液密に塞がれる。 And attaching take the channel connection member 30 to the instrument inlet projection 21 as shown in FIG. 5, O-ring holding groove 47 is inserted to the inner peripheral side of the flange projection 37, the treatment instrument insertion port projection 21 and the channel connection member 30 during the blocked fluid-tightly by the O-ring 46.
【0015】 [0015]
処置具挿入口突起21に対してチャンネル接続部材30のみを装着した状態では、中空管路31Aと中空管路31Bのいずれも連通空間22に連通している。 In the state of mounting only channel connecting member 30 relative to the instrument inlet projection 21, none of the hollow conduit 31A and the hollow conduit 31B communicates with the communication space 22. チャンネル接続部材30には、処置具挿通チャンネル20A、20Bへの陰圧の作用経路を制御するための吸引流路切替ダイヤル50を着脱可能である。 The channel connection member 30 is detachable suction flow path switching dial 50 for controlling the course of action of the treatment instrument insertion channel 20A, negative pressure to 20B. 図5及び図6に示すように、吸引流路切替ダイヤル50は、弁部材挿入空間42に挿入される弁部材51と、弁部材51に固定され該弁部材51と一体に回動するノブ52と、該弁部材51とノブ52の間に位置する取付環53とを備えている。 As shown in FIGS. 5 and 6, the suction passage switching dial 50, the valve member and the valve member 51 to be inserted into the insertion space 42, the knob 52 which rotates integrally with the valve member 51 is secured to the valve member 51 When, and a mounting ring 53 located between the valve member 51 and the knob 52. 弁部材51、ノブ52及び取付環53はいずれも、合成樹脂の成形品である。 Both the valve member 51, the knob 52 and the mounting ring 53 is a molded product of synthetic resin.
【0016】 [0016]
弁部材51は、弁部材挿入空間42の内径に対応する径の大径部51aと、この大径部51aと同心の小径軸部51bを有しており、大径部51aから下方に向けて、所定の周方向長さを有する扇形断面の流路切替弁55が突設されており、弁部材51を弁部材挿入空間42に挿入した状態では流路切替弁55は連通空間22に位置される。 The valve member 51 includes a large diameter portion 51a of the diameter corresponding to the inner diameter of the valve member insertion space 42 has the large diameter portion 51a concentric with the small-diameter shaft portion 51b, toward the large-diameter portion 51a downward are flow path switching valve 55 of the fan-shaped cross section projecting with a predetermined circumferential length, the channel switching valve 55 is in a state of inserting the valve member 51 on the valve member insertion space 42 is located in the communication space 22 that. 小径軸部51bの先端部付近は、外周面の一部を切り欠いて周方向凹部56が形成されており、非円形断面形状となっている。 Near the tip portion of the small-diameter shaft portion 51b is circumferential recess 56 partially cut away of the outer peripheral surface is formed, has a non-circular cross-sectional shape. また、大径部51aの外周面には、Oリング57を保持するためのOリング保持溝58が形成されている。 Further, the outer peripheral surface of the large diameter portion 51a, the O-ring holding groove 58 for holding an O-ring 57 is formed.
【0017】 [0017]
ノブ52は、取付環53に対向するディスク状部52aの下面側に、回転規制孔60と、該回転規制孔60を中心として周方向に位置を異ならせて配した4つのクリック凹部61とが形成されている。 Knob 52, the lower surface side of the disc-shaped portion 52a facing to the mounting ring 53, and the rotation restricting holes 60, and four clicks recesses 61 arranged at different positions in the circumferential direction around the rotation restricting holes 60 It is formed. また、回転規制孔60の奥側にはねじ孔62が形成されている。 Further, screw holes 62 are formed in the rear side of the rotation restricting hole 60. 回転規制孔60は、非円形断面に形成された小径軸部51bの先端部が相対回動不能に嵌まる、非円形の内面形状を有している。 Rotation restricting holes 60, the tip portion of the small-diameter shaft portion 51b formed on the non-circular cross-section has a rotationally fixed fit, a non-circular inner shape.
【0018】 [0018]
取付環53は、同心状の大小の筒状部53a、筒状部53bと該筒状部の底部を構成するディスク状部53cとを有する有底環体であり、ディスク状部53cの表裏と小径の筒状部53aを貫通する円形の貫通孔65を有している。 Mounting ring 53 is a bottom ring member having a disk-like portion 53c which constitutes concentric large and small tubular portions 53a, the bottom portion of the cylindrical portion 53b and the cylindrical portion, and the front and back surfaces of the disc-shaped portion 53c It has a circular through hole 65 penetrating the small-diameter cylindrical portion 53a. 該貫通孔65の内周面には、回転角制御突起66が突設されている。 The inner peripheral surface of the through hole 65, the rotation angle control projection 66 is projected. 一方、取付環53における外側の筒状部53bの内周面にはスナップリング67が保持されている。 On the other hand, the inner peripheral surface of the outer tubular portion 53b in the attaching ring 53 snap ring 67 is retained. スナップリング67は径方向に弾性変形可能であり、自由状態ではその内縁部が筒状部53bの内周面よりも突出している。 Snap ring 67 is elastically deformable in the radial direction, the inner edge in a free state protrudes from the inner peripheral surface of the cylindrical portion 53b. また、筒状部53bにはディスク状部53cと反対方向に向けて回転規制突起68が突設されている。 Further, the cylindrical portion 53b rotation regulating projection 68 is projected toward the direction opposite to the disc-shaped portion 53c.
【0019】 [0019]
図6に示すように、取付環53のディスク状部53cには、筒状部53a及び53bとは反対側を向く面側、すなわち内視鏡への装着時における外面側に、貫通孔65を中心として周方向に等間隔で6つのクリック凸部69が形成されている。 As shown in FIG. 6, the disk-shaped portion 53c of the mounting ring 53, side facing the side opposite to the cylindrical portion 53a and 53b, i.e. the outer surface side at the time of attachment to the endoscope, the through hole 65 equidistant six click protrusions 69 are formed circumferentially about. 6つのクリック凸部69の形状は共通している。 The shape of the six-click protrusions 69 are common. また取付環53cのディスク状部53cには、クリック凸部69よりも外縁側に、周方向に等間隔で3つの回転位置指標70が設けられている。 Also the mounting ring 53c disc-shaped portion 53c of the outer edge than the click protrusions 69, the circumferential direction into three rotational position indicator 70 at equal intervals is provided.
【0020】 [0020]
吸引流路切替ダイヤル50を組み立てる際には、まず、取付環53に対し、回転角制御突起66が周方向凹部56内に位置するように位相を合わせて、筒状部53aの先端開口側から貫通孔65内に弁部材51の小径軸部51bを挿入する。 When assembling the suction flow path switching dial 50 first to the mounting ring 53, the combined phase so that the rotation angle control projection 66 is positioned in the circumferential recess 56, from the distal end opening side of the cylindrical portion 53a inserting the small diameter shaft portion 51b of the valve member 51 into the through hole 65. すると、小径軸部51の先端は取付環53cのディスク状部53cから突出する。 Then, the tip of the small-diameter shaft portion 51 protrudes from the disk-shaped portion 53c of the mounting ring 53c. このとき、図5に示すように、取付環53cのディスク状部53cと弁部材51の大径部51aの間に圧縮コイルばね71を予め挿入しておく。 At this time, as shown in FIG. 5, advance insert compression coil spring 71 between the large diameter portion 51a of the disc-shaped portion 53c and the valve member 51 of the mounting ring 53c.
【0021】 [0021]
続いて、取付環53cのディスク状部53cのうちクリック凸部69が形成された面側にノブ52を載せ、回転規制孔60を弁部材51の小径軸部51b先端に係合させる。 Then, place the knob 52 on the side the click convex portion 69 is formed of a disk-shaped portion 53c of the mounting ring 53c, to engage the rotation restricting hole 60 in the small diameter portion 51b the tip of the valve member 51. 回転規制孔60と小径軸部51bは非円形断面形状であり、その嵌合によってノブ52と弁部材51は相対回動不能に結合される。 Rotation restricting holes 60 and the small diameter shaft portion 51b is non-circular cross-sectional shape, the knob 52 and the valve member 51 by the fitting is non-rotatably connected.
【0022】 [0022]
さらに、弁部材51を軸線方向に貫通するビス挿入孔73に対してビス72を挿入し、該ビス72をノブ52に設けたねじ孔62に螺合させる。 Further, by inserting the screw 72 against screw insertion holes 73 penetrating the valve member 51 in the axial direction, it is screwed into the screw hole 62 provided the bis 72 to the knob 52. 図5に示すように、ビス72を最奥までねじ込むと、小径軸部51bの先端が回転規制孔60の底部に当接し、弁部材51とノブ52は相対回動のみならず軸線方向へも相対移動不能となる。 As shown in FIG. 5, when screwing the screw 72 deepest, the tip of the small diameter shaft portion 51b contacts the bottom of the rotation restricting holes 60, also the valve member 51 and the knob 52 is axially not relative rotation only the relatively immovable.
【0023】 [0023]
この状態で吸引流路切替ダイヤル50は、小径軸部51bの外周面が貫通孔65の内周面に対して回動可能かつ軸線方向に移動可能に嵌っており、弁部材51とノブ52の結合体は、取付環53に対して回動及び軸線方向移動が可能に支持される。 Suction flow switching dial 50 in this state, the outer peripheral surface of the small-diameter shaft portion 51b are fitted to be movable in rotatable and axially relative to the inner peripheral surface of the through hole 65, the valve member 51 and the knob 52 conjugates, rotation and axial movement is rotatably supported relative to the mounting ring 53. なお、弁部材51とノブ52の結合体の最大回動角は、周方向凹部56の両端面と回転角制御突起66の当接によって制限される。 The maximum rotation angle of the coupling member of the valve member 51 and the knob 52 is limited both end faces of the circumferential recess 56 and by the abutment of the rotation angle control projection 66.
【0024】 [0024]
圧縮コイルばね71は、吸引流路切替ダイヤル50を組んだ状態で軸線方向に圧縮されており、該圧縮を解除しようとする復元力によって、弁部材51を図5中の下方へ付勢する。 Compression coil spring 71 is axially compressed in a state that formed a suction flow path switching dial 50, the restoring force to be released the compression, to urge the valve member 51 downward in FIG. 該付勢力は、弁部材51を介してノブ52に伝わり、ノブ52は取付環53(ディスク状部53c)に接近する方向へ付勢される。該付 force is transmitted to the knob 52 through the valve member 51, the knob 52 is urged in a direction approaching the mounting ring 53 (the disk-shaped portion 53c). すなわち、ノブ52側のクリック凹部61と取付環53のクリック凸部69を係合させる方向へ付勢力が作用しており、該クリック凹部61とクリック凸部69の係合関係によって、取付環53に対するノブ52及び弁部材51の回動が規制される(クリックストップされる)。 That is, with the click convex portion 69 of the knob 52 side of the click recesses 61 and the mounting ring 53 in the direction of engaging force has acted, the engagement relationship of the click recesses 61 and click convex portion 69, the mounting ring 53 rotation of the knob 52 and the valve member 51 is restricted with respect to (the click-stop). 前述したように、結合された弁部材51とノブ52は、取付環53に対して相対回動のみならず軸線方向にも移動可能であり、ノブ52に一定以上の回動力が加わると、各クリック凹部61の周方向端面がクリック凸部69を乗り越えてノブ52が取付環53から持ち上げられ、クリックストップが解除される。 As described above, the valve member 51 and the knob 52 coupled is also movable in the axial direction not rotationally only with respect to the mounting ring 53, the applied constant over turning force to the knob 52, each knob 52 circumferential end surface rides over the click protrusions 69 of the click recesses 61 is lifted from the attachment ring 53, a click stop is released. そしてノブ52と共に、弁部材51も圧縮コイルばね71を圧縮させながら持ち上がる。 And with the knob 52, the valve member 51 is also raised while compressing the compression coil spring 71. ノブ52が所定角度回転すると、各クリック凹部61が次に対応するクリック凸部69の位置に達し、圧縮コイルばね71の付勢力によってクリック凹部61がクリック凸部69に係合される。 When the knob 52 is rotated by a predetermined angle, each click recesses 61 then reaches the position of the corresponding click protrusions 69, click recess 61 is engaged with the click convex portion 69 by the biasing force of the compression coil spring 71.
【0025】 [0025]
以上のようにサブアッシされた吸引流路切替ダイヤル50は、取付環53に設けた回転規制突起68が処置具挿入口突起21側の回転規制凹部38に係合する角度位置をもって、チャンネル接続部材30に取り付けられる。 Or suction channel switching dial 50 which is sub-assembly as is at an angle position at which the rotation restricting projection 68 provided on the installation ring 53 is engaged with the rotation restricting recess portion 38 of the treatment instrument insertion opening protrusion 21 side, the channel connection member 30 It is attached to. 回転規制突起68と回転規制凹部38の係合により、取付環53は処置具挿入口突起21に対し回転不能となる。 By the engagement of the rotation restricting projection 68 rotation restricting recess 38, the mounting ring 53 is nonrotatable with respect to the instrument inlet projection 21. また、取付環53の内周面に設けたスナップリング67がスナップリング係合環部44に係合することで、チャンネル接続部材30に対して取付環53が軸線方向に抜け止められる。 Further, a snap ring 67 provided on the inner peripheral surface of the mounting ring 53 by engaging the snap ring Kakarigowa portion 44, the mounting ring 53 for the channel connection member 30 is retained in the axial direction. チャンネル接続部材30に対する取付環53の最大挿入位置は、取付環挿入規制面45によって規制される。 Maximum insertion position of the installation ring 53 for the channel connection member 30 is restricted by the mounting ring insertion restricting surface 45.
【0026】 [0026]
取付環53をチャンネル接続部材30に取り付けたとき、図5のように弁部材51の大径部51aは弁部材挿入空間42内に挿入され、流路切替弁55が連通空間22内に位置する。 When fitted with a mounting ring 53 to the channel connection member 30, the large diameter portion 51a of the valve member 51 as shown in FIG. 5 is inserted into the valve member insertion space 42, the flow path switching valve 55 is positioned in the communicating space 22 . 流路切替弁55は、連通空間22の内周面に対応する径の円筒面状の外周面を有し、この外周面を連通空間22の内周面に摺接させて回動することができる。 Channel switching valve 55, to be the inner having a cylindrical surface outer peripheral surface of the diameter corresponding to the circumference, the rotation by sliding contact with the outer peripheral surface to the inner peripheral surface of the communication space 22 of the communication space 22 it can. 流路切替弁55の内周面は、いずれの回転位置においても吸引チャンネル23を塞がない円筒面形状とされている(図3、図5参照)。 The inner peripheral surface of the flow path switching valve 55 is a one of the even not to block the suction channel 23 in the rotary position the cylindrical surface shape (see FIGS. 3 and 5).
【0027】 [0027]
流路切替弁55を有する弁部材51は、チャンネル接続部材30に対して一定の回転角(回転規制された取付環53の回転角制御突起66が周方向凹部56の両端壁面に当接するまでの間隔)で回動可能であり、連通空間22内に挿入された流路切替弁55はこの弁部材51の回動に応じて、径方向連通路41Aと径方向連通路41Bのいずれにも面さない位置(双方連通状態:図7)、径方向連通路41Aに対向する位置(片方連通状態:図8)、及び径方向連通路41Bに対向する位置(片方連通状態:図9)に移動される。 Valve member 51 having a flow path switching valve 55, to the rotation angle control projection 66 of the fixed rotation angle (rotation regulated installation ring 53 for the channel connection member 30 abuts against the ends walls of the circumferential recess 56 is pivotable at an interval), the communication space 22 inserted flow path switching valve 55 in response to rotation of the valve member 51, the surface in either radial direction communicating channel 41A and the radial communicating passage 41B It is not positioned (both communicating state: 7), a position facing the radial direction communicating channel 41A moves to: (9 one communication state) (one communication with FIG. 8), and a position opposed to the radial direction communicating channel 41B It is. 弁部材51は、前述のクリック機構により図7ないし図9に示す3つの回動位置において係止される。 The valve member 51 is locked in three rotational positions shown in FIGS. 7 to 9 by the aforementioned click mechanism. なお、流路切替弁55が図7ないし図9のいずれの回転位置にあるときも、チャンネル接続部材30と弁部材51の間はOリング57によって液密に塞がれているため、連通空間22内に吸引された流体は、弁部材挿入空間42を通って外部へ漏出することはない。 Since the flow path switching valve 55 is also when in any rotational position of FIGS. 7-9, during the channel connection member 30 and the valve member 51 is closed liquid-tightly by O-ring 57, communication space fluid sucked into the 22 will not be leaked to the outside through the valve member insertion space 42.
【0028】 [0028]
さらに図3、図ないし図9に示すように、 略扇形をなす流路切替弁55の周方向の両端部には、外周面の一部を切り欠いて一対の吸引力調整用凹部(吸引力調整流路)81A及び81Bが形成されている。 Furthermore Figure 3, as shown in FIGS. 6 to 9, the both ends in the circumferential direction of the flow path switching valve 55 having a substantially fan shape, by cutting out a part of the outer peripheral surface a pair of the suction force adjusting recesses (suction power adjustment channel) 81A and 81B are formed.
【0029】 [0029]
以上の構造において、図7の双方連通状態では、流路切替弁55が径方向連通路41Aと径方向連通路41Bを完全に開いているため、吸引チャンネル23からの陰圧が遮られることなく、処置具挿通チャンネル20Aと処置具挿通チャンネル20Bの双方に均等に吸引力が作用する。 In the above structure, in both communication with FIG. 7, the flow path switching valve 55 is fully open in the radial direction communicating channel 41A and the radial communicating passage 41B, without negative pressure from the suction channel 23 is blocked , equally attractive force acts on both of the treatment instrument insertion channel 20B and the treatment instrument insertion channel 20A. つまり、処置具挿通チャンネル20Aと処置具挿通チャンネル20Bの両方を用いた吸引作業が可能である。 In other words, it is possible suction operation using both of the treatment instrument insertion channel 20B and the treatment instrument insertion channel 20A.
【0030】 [0030]
処置具挿通チャンネル20Aと処置具挿通チャンネル20Bのいずれか一方を吸引用の管路として使用し、他方に処置具を挿入する場合には、ノブ52を回動操作して流路切替弁55を図8または図9の位置に移動させる。 One of the treatment instrument insertion channel 20A treatment instrument insertion channel 20B is used as a conduit for aspiration, when inserting the treatment instrument to the other, a flow path switching valve 55 of the knob 52 and rotating operation It is moved to the position of FIG. 8 or 9. 例えば、図8の位置では流路切替弁55が径方向連通路41A、すなわち処置具挿通チャンネル20Aを概ね塞ぐため、吸引ポンプ27と連通される他方の処置具挿通チャンネル20B側で吸引操作を行うようになる。 Carried out, for example, the flow path switching valve 55 is radial direction communicating channel 41A in the position of Figure 8, i.e. to block substantially the treatment instrument insertion channel 20A, the suction operation with the other in communication with the suction pump 27 of the treatment instrument insertion channel 20B side so as to.
【0031】 [0031]
ところで、 流路切替弁55の外周面の周方向一端部には吸引力調整用凹部81Aが形成されており、流路切替弁55が図8の片方連通位置に係止されたときに、径方向連通路41Aと連通空間22の間には吸引力調整用凹部81Aによって若干の隙間が確保されている。 Incidentally, the circumferential end portion of the outer peripheral surface of the flow path switching valve 55 are suction force adjusting recess 81A is formed, when the flow path switching valve 55 is locked in one communication position in FIG. 8, the diameter slight gap is ensured by the suction force adjusting recess 81A between the direction communicating channel 41A and the communication space 22. 言い換えれば、流路切替弁55が、処置具挿通チャンネル20Aに続く径方向連通路41Aを不完全に閉じており、処置具挿通チャンネル20Aと連通空間22の間に若干の流体流通が可能となっている。 In other words, the flow path switching valve 55, and incompletely closed radial direction communicating channel 41A following the treatment instrument insertion channel 20A, enables a slight fluid communication between the treatment instrument insertion channel 20A and the communication space 22 ing. この不完全に閉塞された処置具挿通チャンネル20Aによって、処置具挿通チャンネル20B側での陰圧調整が可能となる。 This incompletely occluded treatment instrument insertion channel 20A, it is possible to negative pressure adjustment in the treatment instrument insertion channel 20B side. 例えば、処置具挿通チャンネル20Bを介しての吸引操作中に誤って体内粘膜を吸引してしまった場合、そのままの状態では過度な吸引力が作用するおそれがあるが、吸引力調整用凹部81Aによって他方の処置具挿通チャンネル20A側にも吸引ポンプ27との小さな連通面積が確保されていることにより、この処置具挿通チャンネル20A側に陰圧を逃がすことができる。 For example, if you've aspirated body mucosa by mistake during the suction operation through the treatment instrument insertion channel 20B, there is a risk of acts excessive attraction force as it is, by the suction force adjusting recess 81A by also the other treatment instrument insertion channel 20A side is a small area of ​​communication with the suction pump 27 is secured, it is possible to release the negative pressure in the treatment instrument insertion channel 20A side. よって、処置具挿通チャンネル20Bで過度吸引が発生することがなく、体内粘膜のダメージや吸引ダコの発生を防ぐことができる。 Accordingly, without excessive suction occurs at the treatment instrument insertion channel 20B, it is possible to prevent the occurrence of the body mucosa damage or suction octopus.
【0032】 [0032]
吸引力調整用凹部81Aは、その連通面積が過大であると処置具挿通チャンネル20B側での吸引力が落ち、かつ処置具挿通チャンネル20A側で不要な微吸引が生じる原因となる。 Suction force adjusting recess 81A, the communicating area falls suction force at the treatment instrument insertion channel 20B side is excessively large, and cause the unwanted fine suction occurs at the treatment instrument insertion channel 20A side. 逆に吸引力調整用凹部81Aの連通面積が小さすぎると、上述した陰圧逃がし用流路として機能しない。 When communicating area of the suction force adjusting recess 81A is too small to function as a flow path and is above negative pressure relief. そのため、吸引力調整用凹部81Aの連通面積は適切に設定されている。 Therefore, communication areas of the suction force adjusting recesses 81A are appropriately set. 具体的には、処置具挿通チャンネル20B(中空管路31B)と吸引ポンプ27(連通空間22)との連通面積(径方向連通路41B)を100としたとき、吸引力調整用凹部81Aの連通面積は、5〜10になるように設定されている。 Specifically, when communicating area of the treatment instrument insertion channel 20B (the hollow conduit 31B) and the suction pump 27 (communication space 22) (the radial direction communicating channel 41B) and 100, the suction force adjusting recess 81A communicating area is set to be 5-10.
【0033】 [0033]
また、 流路切替弁55の外周面の周方向他端部には、別の吸引力調整用凹部81Bが形成されている。 Further, in the circumferential direction other end portion of the outer peripheral surface of the flow path switching valve 55, another suction force adjusting recess 81B is formed. そのため、図9のように流路切替弁55を径方向連通路41Bの閉じ位置に回動させて処置具挿通チャンネル20Aを用いて吸引を行う場合も同様に、他方の処置具挿通チャンネル20Bによって、処置具挿通チャンネル20Aの陰圧を調整することが可能である。 Therefore, Similarly, when performing suction by using a by rotating the passage switching valve 55 in the closed position of the radial direction communicating channel 41B treatment instrument insertion channel 20A as shown in FIG. 9, by the other of the treatment instrument insertion channel 20B , it is possible to adjust the negative pressure of the treatment instrument insertion channel 20A. すなわち、流路切替弁55が図9の片方連通位置にあるときには、吸引力調整用凹部81Bによって連通空間22と径方向連通路41Bの間で少量の流体流通が可能となっており、処置具挿通チャンネル20A側に過度な吸引力が作用し得るような場合に、吸引力調整用凹部81Bを通して処置具挿通チャンネル20B側に陰圧を逃がすことができる。 That is, when the flow path switching valve 55 is in one communication position in Figure 9 enables a small amount of fluid flow between the communication space 22 and radial communicating passage 41B by the suction force adjusting recess 81B, the treatment tool If excessive suction to insertion channel 20A side as can act can escape negative pressure in the treatment instrument insertion channel 20B side through the suction force adjusting recess 81B. 先の吸引力調整用凹部81Aと同様に、処置具挿通チャンネル20A(中空管路31A)と吸引ポンプ27(連通空間22)との連通面積(径方向連通路41A)を100としたとき、吸引力調整用凹部81Bの連通面積は、5〜10になるように設定されている。 As in the previous suction force adjusting recess 81A, when the communication area of the treatment instrument insertion channel 20A (the hollow conduit 31A) and the suction pump 27 (communication space 22) (the radial direction communicating channel 41A) is 100, communication area of the suction force adjusting recess 81B is set to be 5-10.
【0034】 [0034]
以上のように、本実施形態の内視鏡では、各処置具挿通チャンネル20A及び20B(中空管路31A及び31B)と連通空間22との間に、 流路切替弁55の外周面の一部を切り欠いて、径方向連通路41A及び41Bより小さな連通面積の吸引力調整用凹部81A及び81Bを形成し、吸引源と連通される一方の処置具挿通チャンネルとは反対側の処置具挿通チャンネルに吸引源の陰圧を逃がすことを可能としたので、過度吸引による体内粘膜の損傷や、吸引ダコの発生を回避することができる。 As described above, in the endoscope of the present embodiment, between the and the communication space 22 each treatment instrument insertion channel 20A and 20B (the hollow conduit 31A and 31B), the outer peripheral surface of the flow path switching valve 55 one by notching part to form a radial direction communicating channel 41A and the suction force adjusting recesses 81A and 81B of small communicating area than 41B, the treatment instrument insertion opposite to the one treatment instrument insertion channel communicates with the suction source since it possible to escape negative pressure suction source to the channel, it is possible to avoid damage to the body mucosa by excessive suction, a generation of suction octopus.
【0036】 [0036]
なお、本発明は図示実施形態に限定されるものではない。 The present invention is not limited to the illustrated embodiment. 例えば、図示実施形態では、流路切替弁55を移動及び係止させる操作部材として吸引流路切替ダイヤル50を用いているが、吸引流路切替ダイヤル50とは異なる構造の操作部材を用いてもよい。 For example, in the illustrated embodiment uses a suction channel switching dial 50 the flow path switching valve 55 as the movement and locked to the operating member, even by using the operation member having a structure different from that of the suction flow path switching dial 50 good.
【0037】 [0037]
【発明の効果】 【Effect of the invention】
以上から明らかなように、本発明によれば、処置具挿通チャンネルによる過度吸引を防ぐことが可能な内視鏡の吸引切替機構が得られる。 As apparent from the above, according to the present invention, suction switching mechanism of an endoscope that can prevent excessive suction by the treatment instrument insertion channel can be obtained.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】 本発明を適用した吸引流路切替ダイヤルを有する内視鏡の外観図である。 1 is an external view of an endoscope having a suction flow path switching dial according to the present invention.
【図2】 図1の内視鏡における流体流通路の概要を示す内部構造図である。 It is an internal structural diagram showing an outline of the fluid flow path in Figure 2 the endoscope of FIG.
【図3】 図1の内視鏡の処置具挿入口突起の平面方向の断面図である。 3 is a cross-sectional view of a planar direction of the treatment instrument insertion opening protrusion of the endoscope of FIG.
【図4】 処置具挿入口突起から流路切替ダイヤルを取り外した状態の平面図である。 4 is a plan view of a state where removal of the flow path switching dial from the treatment instrument insertion opening protrusion.
【図5】 吸引流路切替ダイヤル付近の断面図である。 5 is a cross-sectional view of the suction flow path switching around the dial.
【図6】 吸引流路切替ダイヤルの分解斜視図である。 6 is an exploded perspective view of the suction flow path switching dial.
【図7】 流路制御弁が2つの処置具挿通チャンネルの両方を開いた状態を示す図である。 [7] the flow path control valve is a diagram showing an opened state of the both two treatment instrument insertion channel.
【図8】 流路制御弁が一方の処置具挿通チャンネルを閉じた状態を示す図である。 [8] the flow path control valve is a diagram showing a closed state of the one treatment instrument insertion channel.
【図9】 流路制御弁が他方の処置具挿通チャンネルを閉じた状態を示す図である。 [9] the flow path control valve is a diagram showing a closed state of the other treatment instrument insertion channel.
【符号の説明】 DESCRIPTION OF SYMBOLS
11 把持操作部12 挿入部13 連結部14 ユニバーサルチューブ15 コネクタ20A 20B 処置具挿通チャンネル21 処置具挿入口突起22 連通空間23 吸引チャンネル24 吸引シリンダ25 吸引ニップル26 吸引ボタン27 吸引ポンプ(吸引源) 11 gripping the operation portion 12 the insertion portion 13 connecting portion 14 Universal tube 15 connectors 20A 20B treatment instrument insertion channel 21 instrument inlet projection 22 communicating space 23 suction channel 24 suction cylinder 25 suction nipple 26 the suction button 27 a suction pump (suction source)
30 チャンネル接続部材31A 31B 中空管路(処置具挿通チャンネル) 30 channel connection member 31A 31B hollow conduit (treatment instrument insertion channel)
32A 32B 中継チューブ41A 41B 径方向連通路50 吸引流路切替ダイヤル51 弁部材52 ノブ53 取付環55 流路切替弁61 クリック凹部69 クリック凸部70 回転位置指標81A 81B 吸引力調整用凹部(吸引力調整流路) 32A 32B relay tube 41A 41B radial direction communicating channel 50 suction flow path switching dial 51 valve member 52 knob 53 installation ring 55 the channel switching valve 61 click recesses 69 click convex portion 70 the rotational position indicator 81A 81B attraction force adjustment recess (attraction adjust flow path)

Claims (2)

  1. 吸引源; Suction source;
    一対の処置具挿通チャンネル; A pair of treatment instrument insertion channel;
    上記一対の処置具挿通チャンネルを周方向の異なる位置に連通させる円筒状の内周面を有し、かつ吸引源に連通する連通空間; Communication space for communicating the pair of treatment instrument insertion channel has a cylindrical inner peripheral surface that communicates to the circumferential direction at different positions, and to a suction source;
    上記連通空間の円筒状内周面に摺接する円筒状外周面を有し、連通空間の内周面に沿う回動により、吸引源を上記一対の処置具挿通チャンネルの何れか一方に切替連通させる二つの片方連通状態と、吸引源を一対の処置具挿通チャンネルの双方に連通させる双方連通状態とに切替動作可能な流路切替弁;及び It has a cylindrical outer peripheral surface in sliding contact with the cylindrical inner peripheral surface of the communication space, by rotation along the inner circumferential surface of the communication space, to the suction source through switching with the either of the pair of treatment instrument insertion channel and two one communication with the suction source can be switched operated on with both communication with communicating with both of the pair of treatment instrument insertion channel of the flow path switching valve; and
    上記流路切替弁が上記二つの片方連通状態のそれぞれにあるとき、吸引源に連通している一方の処置具連通チャンネルとは別の他方の処置具挿通チャンネルを、該一方の処置具挿通チャンネルと吸引源との連通面積より小さい連通面積で吸引源に連通させる、流路切替弁の外周面の周方向の両端部に形成した一対の凹部よりなる吸引力調整流路; When the flow switching valve is in each of the two one communicating state, another other treatment instrument insertion channel and one of the treatment instrument communicating channel communicating with the suction source, said one of the treatment instrument insertion communicating to a suction source with a small communicating area than the area of communication between the channel and the suction source, the suction force adjustment channel consisting of a pair of recesses formed on both end portions in the circumferential direction of the outer peripheral surface of the flow path switching valve;
    を備えたことを特徴とする内視鏡の吸引切替機構。 Suction switching mechanism of an endoscope comprising the.
  2. 請求項1記載の内視鏡の吸引切替機構において、上記一方の処置具挿通チャンネルと吸引源との連通面積を100としたとき、上記小さい連通面積は5〜10である内視鏡の吸引切替機構。 In the suction switching mechanism of an endoscope according to claim 1, when the communication area between the suction source and one of the treatment instrument insertion channel above and 100, suction switching endoscopic said small communication area is 5 to 10 mechanism.
JP2002045905A 2002-02-22 2002-02-22 Suction switching mechanism of an endoscope Active JP4056760B2 (en)

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