3 1289067 玫、發明說明： 【發明所屬之技術領域 技術領域 树明係有關於在具有多數分歧部之 5裝置中促進存在於Α巾 Ί w路切換 術。 、/、中一刀歧勒部之流體的置換之技 C先前技術】 背景技術 為了將藥液輸送 用以切換其流路 現今，在醫療器具的領域中，例如， 10 15 給患者，係使用配置於輸賴與患者之間 之流路切換裝置。 训匕3錢為流體之流路的多數分歧部 等各分歧部之流路的切換部之活拾作為流路 換裝置疋已知的’而目前廣為利用的是其中具有 部之三路活栓。 第5圖係與第1習知技術相關之三路活栓的截面圖。 如圖所示，三路活栓具有本體部_及切換部謂，且 切換部820可自由旋動地插入本體部8〇〇。 八本體部800包含有2個18〇。相向之第^歧部刪、第2 分歧部802及配置成分別與該等第1分歧部801、第2分歧部 2成9〇之第3分歧部803，且三個分歧部8〇1〜8〇3配置 字狀。 卜於第1分歧部801連接與輸液源相連之管（未圖示），而於 第2分歧部802則連接與患者相連之管（未圖示）。 1289067 第3分歧部803係藉由路厄（!uer)式針頭等從外部將藥 液混合注入三路活栓内部者，且包含有分歧管8〇4、分隔膜 8〇5、蓋子806，並且分歧管8〇4之開口部隔著分隔膜8〇5用 蓋子806來密封。於此，在分隔膜8〇5中有縫隙8〇允，且於 5蓋子806中與縫隙8〇5a相對的部分開設有孔8〇6a。藥液係藉 由已填充藥液之路厄式針頭的前端通過孔8〇6a及縫隙8〇5a 插入分歧管8〇4内部來注入，以填充區域A。 於切換部820中穿設有用以連結各分歧部8〇1〜8〇3之交 叉成T字狀之流路82〇a，且藉由旋動切換部82()，可變更用 10 以連結各分歧部801〜8〇3之流路。 於此，當切換部820如第5圖所示配置於用以連結三個 分歧部8(Π、8〇2、8〇3之位置時，從輪液源供給之輸送液體 會從第1分歧部801大致直線地流向第2分歧部8〇2，因此注 ^第3分歧部8〇3之區域a的藥液將不易混換在所流入之輪 15达液體中，而容易殘留。此時，將無法將正綠劑量的藥液 配给患者，而且，當該藥液為適合細菌之培養基的高卡路 里藥液時，區域A中有可能成為藥—細菌繁殖的溫 床。 為了解決上述問題，有記載於曰本專利公開公報特開 2〇平號之技術（以下，稱作第2習知技術。）。 第6圖係與第2習知技術相關之三路活栓的截面圖。 如圖所示，於與第2習知技術相關之三路活栓中，由於 =著切換部920之圓周面形成圓弧溝狀之流路92Qa且使第3 分歧部9〇3較短，故第1習知技術中形成於第3分歧部内 1289067 之區域A變得極小。 如此一來，若透過分隔膜905之縫隙905a將路厄式針頭 S之刖端插入，且從此處供給藥液，則藥液可直接供給至流 路920a。因此，區域A中幾乎不會殘留藥液，且即使殘留些 5許藥液，亦由於當從第1分歧部901流入之輸送液體與混合 /主入第3分歧部903之區域A的藥液接觸後會流向第2分歧部 902 ’故相較於上述第丨習知技術，可更容易置換填充於第3 分歧部903之區域a的藥液，並可抑制細菌的繁殖。 而’在醫療現場，也有暫時性地中斷從安裝於三路活 1〇栓之路厄式針頭乂主入藥液且旋轉切換部920以切換流路之 隋形。此時，為了省去一個一個取出路厄式針頭S的時間， 也有維持插著路厄式針頭s而旋轉切換部92〇的情形發生。 此時，於第2習知技術中，由於第3分歧部903之區域A變得 ° 口此 旦維持插者路厄式針頭S而旋轉切換部920， 則路厄式針頭S之前端會卡住切換部92〇之流路92〇a，而無 法旋轉切換部920。 為了防止上述情況發生，如第7圖所示，亦可加長第3 分歧部903以取得廣大的區域a,使路厄式針頭s之前端不要 與切換部920接觸。 二而，右為上述構造，則第7圖所示之三路活检中位於 區域A之前端角的區域A，容易產生沉澱，且不易藉由從第i 分歧部901流入之輸送液體來置換，並且藥液的置換有可能 P刀I*生地延遲。特別是在使用比重不同的輸送液體與藥液 吩，會有藥液的置換容易延遲的傾向。若如上所述而混合 Ϊ289067 左入之藥液的置換變慢’則會提高細菌繁殖的可能性，同 時從第3分歧部903混合注入之藥液有可能殘留於區域a，因 此也會提高未將必要量之藥液配給患者的可能性。 又在a際的醫療現場，在交換管子時必須同時關閉 三個分歧部’此時，將切換部旋轉45。是—般會進行的操 作，如’以第5圖所示之三路活栓為例，藉由將切換部82〇 旋轉45° (-45° )，可同時關閉三個分歧部8〇1〜咖。 但，於與第2習知技術相關之三路活拾中，冑沿著切換 10 部920之㈣面形成流路92Ga錢切換部％峻動而同時關 閉三個分歧部901〜903時，若不從第6圖、第7圖所示之位置 旋轉135°或225。則無法關閉。 因此，當利用第2習知技術時，在醫療現場必須改變操 作方法，如此-來會提高歧作業者的可能性。因此也兩 要有藉由使切換部傾斜45。來關閉所有分歧部同時加速: 15混合注入之藥液的置換之技術。 【明内溶1】 發明之揭示 本發明有鑑於上述課題， 實際使用的流路切換裝置為目 以提供—種適合醫療現場之 的。 關之流路切換裝置係 之構造的裝置本體及 由使滑動體於裝置本 入之流體同時或兩者 前述滑動體位於裝置 為了達成上述目的，與本發明相 由具有從中空室分歧連出3條分歧路 内插於中空室之滑動體所構成，且藉 體内滑動，可使從其中一分歧路所流 擇一地切換流出至其他二分歧路，者 20 1289067 本體内之預定滑動位置時，於該滑動體形成有前述第i流路 與第2流路，在第i流路連通第！分歧路與第3分歧路，同時 第2流路連通第2分歧路與第3分歧路之關係位置上，前述第 1流路與第2流路實質上是分別不同的通路，$，前述第玢 5歧路之中空室_口部係由對應於前述第丨、第城路之兩 個獨立通孔所構成。 猎由上述構造，當從第丨分歧路供給輸送液體，且從第 祕歧路供給藥液時，輸送液體係經過滑動體之第丨流路朝 第3刀歧路之中工至側開口排出。該輸送液體透過設於與第 10 1流路相對之關係位置的一個通孔進入第3分歧路内，且與 填充於該處之藥液混合。該業經混合之液體則透過設於與 第2流路相對之關係位置的另一通孔通過第2流路，且從幻 分歧路配給患者。 於此，如第2習知技術，當第3分歧路之中空室側開口 15僅開設-個大的通孔，則由於輸送液體等流體透過一個通 孔在第卜第2流路與第3分歧路之間進出，故通過該處之流 體的流動會混亂，且無法提高從第i流路進入第3分歧路内 之輸送液㈣錢’並且有可能在第3分歧_產生沉殿。 但，如本發明，若於第3分歧狀中空室湖讀應第 20卜第2流路設有2個獨立通孔，則由於相較於一個通孔時通 孔的面積較小，因此對輸送液體作用之壓力會提高，且通 過通孔之輸送液體等流體的流速會加速。如此一來，由於 輸送液體強力地流入第3分歧部内部，故相較於習知技術可 更促進第3分歧路内部的，並可提高殘留於該處之藥液 1289067 的置換速度。又，由於僅設置二個通孔則可分擔液體從第1 流路進入第3分歧路内部之入口與從第3分歧路内部流出第 2流路之出口的工作，故可使第3分歧路内部之流體的流動 為疋方向並加快流速，且可進一步提高置換速度。另一 5方面’由於滑動體中流體於第1流路及第2流路内成為經常 流動之狀態’故亦可抑制滑動體内部之流體的殘留。如此 一來’由於在滑動體内外抑制流體之殘留，故可抑制細菌 的繁殖’同時可將正確劑量之藥液配給患者，並可提供適 合醫療現場之實際使用的流路切換裝置。再者，由於在滑 1〇動體内外可抑制流體的殘留，故不必如第2習知技術將路厄 式針頭等之前端插入滑動體内來注入藥液。如此一來，即 使插著路厄式針頭亦可切換流路，因此與本發明相關之流 路切換裝置較過去更適合醫療現場的實際使用。 歧路之狀訂，若2侧立軌形成為第项孔面向第1流路 j開口且第2通孔面向第2流路之開口的關係位置，則可提 特別是在藉由滑動體側之2個流路同時連通上述3條分 ，因而可進一步提高第3 高第1通孔及第2通孔中流體的流速 分歧路内部之置換速度。 於此’可以雜作為具體的祕城裝置，且該活检 係中空室為圓筒狀之軸部保持部3 1289067 玫, the invention description: [Technical Field] The present invention relates to the promotion of the presence of a wiper switch in a device having a plurality of different portions. BACKGROUND OF THE INVENTION In order to transfer liquid medicine for switching its flow path, in the field of medical instruments, for example, 10 15 is used for patients. A flow switching device between the patient and the patient. In the case of the majority of the different parts of the fluid flow path, the switching part of the flow path of each of the different parts is known as the flow path changing device, and the three-way stopcock having the part is currently widely used. . Fig. 5 is a cross-sectional view of a three-way stopcock associated with the first prior art. As shown in the figure, the three-way stopcock has a body portion _ and a switching portion, and the switching portion 820 is rotatably inserted into the body portion 8A. The eight body portion 800 includes two 18 turns. The opposite portion, the second branch portion 802, and the third branch portion 803 which are disposed in the first and second branch portions 801 and the second branch portion 2, respectively, and the three branch portions 8〇1 to 8〇3 configuration font. A tube (not shown) connected to the infusion source is connected to the first branching portion 801, and a tube (not shown) connected to the patient is connected to the second branching portion 802. 1289067 The third branching portion 803 is a mixture of the chemical liquid and the inside of the three-way stopcock by a Lue (!uer) type needle or the like, and includes a branching pipe 8〇4, a separation film 8〇5, a cover 806, and The opening of the branch pipe 8〇4 is sealed by a cover 806 via a separator film 8〇5. Here, there is a slit 8 in the partition film 8〇5, and a hole 8〇6a is formed in a portion of the cover 806 opposite to the slit 8〇5a. The liquid medicine is injected by inserting the front end of the Luer-type needle filled with the liquid medicine into the inside of the branch pipe 8〇4 through the hole 8〇6a and the slit 8〇5a to fill the area A. The switching unit 820 is provided with a flow path 82〇a for connecting the intersecting portions 8〇1 to 8〇3 to form a T-shape, and the rotation switching unit 82() is used to change the connection 10 to be connected. The flow paths of the different branch portions 801 to 8〇3. Here, when the switching unit 820 is disposed at a position for connecting the three branching portions 8 (Π, 8〇2, and 8〇3) as shown in Fig. 5, the liquid to be supplied from the liquid source of the wheel will be divergent from the first. Since the portion 801 flows substantially linearly to the second branch portion 8〇2, the chemical solution in the region a of the third branch portion 8〇3 is less likely to be mixed in the inflowing wheel 15 to reach the liquid, and is likely to remain. , it will not be able to dispense the positive green dose of the drug solution to the patient, and when the drug solution is a high-calorie drug solution suitable for the culture medium of the bacteria, the area A may become a hotbed of drug-bacteria reproduction. In order to solve the above problems, there is The technique disclosed in Japanese Laid-Open Patent Publication No. 2 (hereinafter referred to as the second conventional technique). Fig. 6 is a cross-sectional view of a three-way stopcock related to the second prior art. In the three-way stopcock according to the second prior art, the circular groove-shaped flow path 92Qa is formed on the circumferential surface of the switching portion 920, and the third branch portion 9〇3 is made shorter. In the prior art, the area A formed in the third branch portion 1289067 is extremely small. Thus, if the partition film 905 is passed through The slit 905a inserts the end of the luer needle S, and the chemical liquid is supplied therefrom, and the chemical liquid can be directly supplied to the flow path 920a. Therefore, the liquid is hardly left in the area A, and even if a few drugs remain. The liquid also flows to the second branching portion 902 when the liquid that has flowed in from the first branching portion 901 comes into contact with the chemical liquid in the region A of the mixed/primary third branching portion 903. According to the technique, it is easier to replace the chemical solution filled in the region a of the third branching portion 903, and the growth of the bacteria can be suppressed. And at the medical site, there is also a temporary interruption from the road installed in the three-way live The needle 乂 main medicinal liquid and rotates the switching portion 920 to switch the shape of the flow path. At this time, in order to save the time for taking out the luer type needle S one by one, the rotation of the switching unit is maintained while the luer type needle s is inserted. In the second conventional technique, the region A of the third branching portion 903 is rotated, and the switching unit 920 is rotated while the region A of the third branching portion 903 is maintained. The front end of the needle S will catch the flow path 92〇a of the switching portion 92, and cannot be rotated. In order to prevent this from occurring, as shown in Fig. 7, the third branching portion 903 may be lengthened to obtain a large area a so that the front end of the luer needle s is not in contact with the switching portion 920. In the above configuration, the region A located at the front corner of the region A in the three-way biopsy shown in Fig. 7 is prone to precipitation, and is not easily replaced by the liquid which flows in from the i-th divergent portion 901, and the liquid medicine The replacement may cause the P-knife I* to be delayed in the ground. In particular, when the transport liquid and the drug liquid benzene having different specific gravities are used, the replacement of the chemical liquid tends to be delayed. If the above-mentioned chemical solution is mixed with Ϊ289067 left-in If it is slowed down, the possibility of bacterial growth is increased, and the chemical solution mixed and injected from the third branching portion 903 may remain in the region a, so that the possibility that the necessary amount of the chemical solution is not distributed to the patient is also increased. At the medical site in a, the three branch portions must be closed at the same time when the pipe is exchanged. At this time, the switching portion is rotated 45. For example, the operation of the three-way stopcock shown in Fig. 5 can be used to close the three branching portions 8〇1~ by rotating the switching portion 82〇 by 45° (-45°). coffee. However, in the three-way movable picking according to the second conventional technique, when the flow path 92Ga money switching portion % is formed along the (four) plane of the switching 10 portion 920 and the three branch portions 901 to 903 are closed at the same time, Do not rotate 135° or 225 from the positions shown in Figures 6 and 7. It cannot be closed. Therefore, when the second conventional technique is utilized, the operation method must be changed at the medical site, so that the possibility of the operator is increased. Therefore, there are also two reasons for tilting the switching portion 45. To close all the divergent parts and accelerate at the same time: 15 mixed injection of the liquid chemical replacement technology. [Inventive Solution 1] The present invention has been made in view of the above problems, and a flow path switching device actually used is intended to be suitable for a medical field. The device body of the closed flow switching device is configured such that the sliding body is placed in the device simultaneously or both of the sliding bodies are located in the device. In order to achieve the above object, the present invention has a divergence from the hollow chamber. The sliding body of the diverging road is inserted into the hollow chamber, and by sliding in the body, the flow can be switched from one of the divergent roads to the other two divergent roads, 20 1289067 when the predetermined sliding position in the body is The i-th flow path and the second flow path are formed in the sliding body, and communicate with the i-th flow path! The divergent road and the third divergent road, and the second flow path is connected to the second divergent road and the third divergent road. The first flow path and the second flow path are substantially different paths, $, the foregoing The hollow chamber of the 玢5 manifold is composed of two independent through holes corresponding to the aforementioned third and third roads. According to the above configuration, when the liquid is supplied from the second divergent road and the chemical liquid is supplied from the first secret path, the transport liquid system is discharged to the side opening through the third flow path of the sliding body through the third flow path of the sliding body. The transport liquid enters the third branch path through a through hole provided at a position opposed to the 101st flow path, and is mixed with the chemical liquid filled therein. The mixed liquid passes through the second flow path through another through hole provided at a position opposite to the second flow path, and is distributed to the patient from the imaginary divergence path. According to the second prior art, when the hollow chamber side opening 15 of the third branching path is opened with only one large through hole, fluid such as liquid is transmitted through one through hole in the second and third flow paths. The flow between the divergent roads is inconvenient, so the flow of the fluid passing through the place is confusing, and it is impossible to increase the transport liquid (four) money from the i-th flow path into the third divergent road and it is possible to generate a sinking hall in the third divergence. However, according to the present invention, if the second divergent hollow chamber lake is to be provided with two independent through holes in the second flow path, since the area of the through holes is smaller than that of the one through hole, The pressure at which the liquid is transported is increased, and the flow rate of the fluid such as the liquid transported through the through holes is accelerated. As a result, since the transport liquid strongly flows into the inside of the third branching portion, the inside of the third branching path can be more promoted than in the prior art, and the replacement speed of the chemical liquid 1289067 remaining therein can be increased. Further, since only two through holes are provided, the operation of the liquid from the first flow path to the inside of the third branch path and the flow of the second flow path from the inside of the third branch path can be shared, so that the third branch path can be obtained. The flow of the internal fluid is in the 疋 direction and accelerates the flow rate, and the displacement speed can be further increased. In the other five aspects, the fluid in the sliding body is constantly flowing in the first flow path and the second flow path, so that the residual fluid in the sliding body can be suppressed. In this way, since the residual of the fluid is suppressed inside and outside the sliding body, the growth of the bacteria can be suppressed, and the correct dose of the drug solution can be dispensed to the patient, and a flow path switching device suitable for practical use at the medical site can be provided. Further, since the fluid residue can be suppressed in the inside and outside of the sway, it is not necessary to insert the anterior end such as a luer needle into the sliding body to inject the medicinal solution as in the second conventional technique. In this way, even if the Luer-type needle is inserted, the flow path can be switched, so that the flow switching device related to the present invention is more suitable for practical use in the medical field than in the past. When the two-side vertical rail is formed so that the first hole faces the opening of the first flow path j and the second through hole faces the opening of the second flow path, the sliding side can be particularly Since the two flow paths simultaneously communicate with the above three points, the displacement speed inside the flow path of the third high first through hole and the second through hole can be further increased. Here, it can be mixed as a specific secret city device, and the hollow chamber of the biopsy system is a cylindrical shaft holding portion.
错由該軸部之旋轉可切換 用以連結裝置本體之各分歧部的 1289067 流路。 歧部於轴二 裂置為配置成使第1分歧部與第2分 伴持邱々持部外周分別相向且第3分歧部位於與轴部 5 1持。叫周之第1分歧部及第2分歧部成卯。之位置之：路 活检要使滑動體旋轉45。即可同時關閉所有分料路 直立:裝=分歧部包含有分歧管及分隔壁，且該分歧管 狀態固定、，、並Γ持部外周，而該分隔壁以其前端受堡之 之縫隙之彈=Γ從外部與前述分歧管内部相連通 另，下述構造作為具體的：者不;， 位於前述轴部保持部内之前述預==即，當㈣ 成有用以連社前、十m + 月動位置時，該轴部形 路的開口 ⑷3分歧部側之第1流路的開口她流 15 X ’於實際的軸部可構成為上述第！、哲、 觀看時形成為L字狀。 、苐2流路從平面 圖式簡單說明 弟1圖係二路活栓之展開透視圖。 第2(a)圖係與本實施形態相關 係將本趙部之孔設為-個的截面圏，第 面圖 面圖。圖係與本實施形態之變形例相關之三路活栓的截 第4圖係與本實施形態之變形例相關之三路活栓的截 1289067 第5圖係與第1習知技術相關之三路活栓的截面圖。 第6圖係與第2習知技術相關之三路活栓的截面圖。 第7圖係與第2習知技術之變形例相關之三路活栓的截 面圖。 5 【】 實施發明之最佳形態 以下，針對將與本發明相關之流路切換裝置適用於三 路活栓時之-實施形態，一面參照圖式—面說明。本發明 之以下所示之實施形態及圖式為本發明實施形態之一例， 10本發明並不限於此。 (1)三路活栓的構造 第1圖係展開與本實脑彡態糊之三路活栓之透視圖。 如圖所示，三路活栓具有切換部丨及本體部2，切換部1 之軸部1G係插人本體部2之軸部保持部2G且保持成可自由 15 旋轉。 於此，首先針對切換部丨所插入之本體部2的構造作說 明0 本體部2包含有用以保持切換部丨之軸部1〇的中空圓筒 狀軸部保持部20及與該軸部保持部2〇相連通且成為朝三路 2〇形成流路之分歧路的第1分歧部21、第2分歧部22、第3分 部23。 刀哎 轴部保持部20係成為形成有用以插入圓柱狀之轴_ 的插入孔20a之中空室，且於該插人孔2_狀地㈣ 有用以與軸部10之卡合溝12相卡合之未圖示的卡合突起。 12 1289067 第刀歧。P2l、第2分歧部μ係由形成為流路之圓筒管 斤構成i配置成於軸部保持部2〇之外周面相向，並直立 «成與軸部贿㈣之插人孔則目連通。於此，於第i 刀歧抑連接與未圖*之輸㈣相連之輸液管，且於第2分 5歧部22連接與未圖示之患者相連之輸液管。 第3为歧部23包含有成為流路之分歧管23〇、蓋保持部 23卜分隔膜232、蓋子233，且成為用以從外部混合注入藥 液之分歧路。 > 分歧管230係於軸部保持部2〇之外周面以與第丨分歧部 10 2卜第2分歧部22互相成90。之角度直立安裝於軸部保持部 20。於此，如第1圖之放大圖所示，於軸部保持部2〇中設有 分歧管230之領域内，即，於成為分歧管23〇之轴部保持部 20側開口之領域内，當軸部10插入用以連通各分歧部21、 22、23之位置時，於與第1流路13〇之流路端⑽!)及第2流路 15 132之流路端132a相對應之位置穿設有通孔2〇〇a、200b。藉 此’分歧管230内部可與軸部保持部20内部相連通，且在三 路活栓中，各分歧部21、22、23可互相連通。 蓋保持部231係以圍住分歧管230之狀態直立安裝於轴 部保持部20之外周面，且具有一對用以保持蓋子233之卡合 20 突起2310(第1圖中僅顯示1個）。 分隔膜23 2係例如由耐藥性佳之彈性體的圓板狀矽橡 膠所構成，且於其中心部形成有朝其厚度方向切斷之縫隙 232a。 蓋子233具有一對形成有卡合孔2330a之卡合部 13 1289067 2330(第1圖中僅顯示丨個），且隔著分隔膜232並藉由卡合部 2330與蓋保持部232之卡合突起231〇相卡合而固定於蓋保 持部231。於此，分隔膜232係扮演密封劑的角色，以於分 歧管230内部確保本體部2之與外部的氣密性。又，由於蓋 5子233推壓分隔膜232，因此於縫隙232a中亦對其相向之兩 面施加壓力，故成為緊閉縫隙之狀態。 於蓋子233面對分隔膜232之縫隙232a穿設有用以引導 路厄式針頭之前端的引導孔233a，且透過引導孔233a插入 路厄式針頭，藉此路厄式針頭可通過分隔膜232之缝隙232a 10並引導至分歧管230内部，以將藥液混合注入該分歧管230。 另一方面，切換部1包含有圓柱狀之轴部1〇及一體形成 於軸部10之端部且用以使軸部10以其中心軸為中心來旋轉 之呈十子形狀之手柄部11。 軸部10在其外周面之遠離手柄部1丨的位置周狀地形成 15有卡合溝12，且藉由與形成於本體部2之軸部保持部20内之 未圖示的卡合突起相卡合而可旋轉地固定於本體部2。 又，於軸部10形成有用以連通本體部2之第1分歧部 21、 第2分歧部22及第3分歧部23且使輸送液體、藥液等流 體流通之流路13。 20 流路13係由折彎成直角之第1流路130及第2流路132和 直線狀之第3流路131所構成，且第3流路131連結第1流路 130與第2流路132而形成一個流路。 當旋轉軸部10使流路13位於可連通所有分歧部21、 22、 23之位置時，第1流路130為用以使第3分歧部23與第1 14 1289067 分歧部21相連通之從平面看呈L字形之流路，且其折彎部分 配置於軸部10之中心軸附近，並且其中一流路端13〇a露出 至軸部10之外周面，同時另一流路端130b則配置於較軸部 10之外周面更凹陷的位置。 5 當旋轉軸部1〇使流路13位於可連通所有分歧部21、 22、23之位置時，第2流路132為用以使第3分歧部23與第2 分歧部22相連通之流路，且與第1流路130相同，從平面看 呈L子形，並且其折彎部分配置於軸部1〇之中心軸附近， 又，其中一流路端132a配置於較軸部10之外周面更凹陷的 10位置以與第3流路丨31相連通，同時另一流路端13沘則配置 成露出至軸部1〇之外周面。 第3流路131在軸部10之外周面上成為從第丨流路13〇之 流路端130b連結至第2流路132之流路端n2a之延伸成直線 狀的溝，且扮演連接第1流路13〇與第2流路的角色。藉 I5由該第3流路131，即使切換部j從第1圖所示之位置旋轉至 反轉180°的位置，亦可連通第i分歧部2ι與第2分歧部 於此，第1流路130之流路端13如與第2流路132之流路 端132b在軸部10之外周面配置成從平面看相向之方向，另 一方面，帛1流路13〇之流路端⑽與第2流路m之流路端 20 132aUSe*置成上下並排，且從平面看時成為重疊之位置。 即，當從平面觀看切換糾時，與第！習知技術中所說明之 切換部相同，流路13配置成τ字狀(參照第㈣。 藉由上述構造，例如當使輪送液體從流路⑽之流路蠕 130a",L入時’如擷取第！圖之流路13的放大圖所示，輸送液 15 1289067 體係通過流路130從其流路端i3〇b進入流路131，接著從流 路132之流路端132a進入流路132，然後從其流路端132b流 出。因此，僅從輸液源供給輸送液體即可抑制輸送液體等 殘留於流路13内部。 5 (2)利用與本實施形態相關之三路活栓的效果 第2(a)圖係與本實施形態相關之三路活栓的截面圖，第 2(b)圖係與比較例相關之三路活栓的截面圖。 如第2(a)圖中之放大圖所示，與本實施形態相關之三路 活栓之軸部保持部20中之通孔2〇〇b、200a係獨立地設於分 10別與第1流路130之流路端130b和第2流路132之流路端132a 相對之位置。 藉此’從流路端130b所流出之輸送液體會通過通孔 200b強力地流入分歧管230。 針對上述情形作說明，例如，如第2(b)圖所示，當用以 15連通第1流路130與第2流路132與分歧管230之通孔200c僅 設置一個時’其面積較第1流路13〇之截面積與第2流路132 之截面積的總和大。因此，此時，通孔2〇〇c内從流路端n〇b 所流出之輸送液體會一面擴散一面流入分歧管23〇。又，由 於輸送液體亦從分歧管230經由通孔200c流至流路端 20 132a ’故通孔20〇c中輸送液體會一面流入一面流出，同時 形成相互逆向之流動。因此，與第2(a)圖相較之下，通孔中 施加於輸送液體之壓力較小。故，從流路端13叻流出之輸 送液體相較於與本實施形態相關之三路活栓係較缓慢地流 入分歧管230内部。如此一來，於分歧管23〇内部有可能部 16 1289067 分性地無法進行置換。 另一方面’於與本實施形態相關之三路活栓中，由於 設置一個通孔2〇0a、2〇〇b，且使各通孔各自扮演流體之流 入·流出之特有的角色，故各通孔中流體之流動不易混亂。 5結果，相較於通孔為一個時，可提高通過各通孔之流體的 速度。如此一來，由於輸送液體強力地流入分歧管23〇内 部’故可促進所混合注入之藥液的置換。 再者，由於各通孔2〇〇a、200b設於與第1流路130之流 路端130b和第2流路132之流路端132a相對之位置，故相較 10於兩者位置偏移時，流體之流動不易混亂，且壓力的損失 會變小，如此一來，可進一步加速通過各通孔2〇〇a、2〇〇b 之流體的速度。於此，通孔2〇〇a、200b之面積宜設為與各 流路131、132之流路端130b、132a之開口面積相同。如此 一來，若各通孔200a、200b之截面積形成為與流路端i32a、 15 13此大致相同，則施加於輸送液體之壓力會更加提高，且 輸送液體可強力地通過透過200b而流入分歧管230内部。 藉由上述效果，用路厄式針頭S注入分歧管230内部之 藥液可與透過通孔200b強力地流入之輸送液體混合、置 換，然後通過通孔200a流出至流路端132a。 20 根據與本發明相關之三路活栓，由於獨立設置二個通 孔200a、200b，故可使輸送液體強力地流入分歧管23〇内 部，且相較於第2(a)圖所示之三路活栓或第1、第2習知技術 中所述之三路活栓，可更快地置換混合注入第3分歧部23之 藥液。再者，由於可使二個通孔200a、200b扮演輪送液體 17 1289067 之入口、出口的角色，故於分歧管230内部可整流成一定方 向之流動’並可加速分歧管230内之流速，以促進置換 另，於軸部10之流路13中，由於構成為輸送液體流動 於其整體，故無第1習知技術中輸送液體或藥液殘留於切換 5 部内之流路之虞。 藉由上述構造，即使藥液為高卡路里且適合細菌之培 養基的藥液，亦可快速地置換藥液，且由於殘留在第3分歧 部23的可能性較過去低，故可抑制細菌的繁殖。再者，從 第3分歧部23内之藥液的殘留變少的情形看來，可將劑量較 10各習知技術更正確之藥液配給患者。 又，由於軸部1〇外周之流路13的開口部僅流路端 130a、13Gb(132a)、l32b三處’故若於第2⑷圖中使軸部 旋轉45。，則可關閉第1分歧部2卜第2分歧部22、第3分歧 部23全部。因此，可與醫療現場一般所使用之三路活 B用同樣的使用方法來同時關閉所有分歧部，且亦不^如 第2習知技術之獨特的操作方法。 而 (變形例） 及 於上述實卿態巾，鱗第1⑽13G之流路端13% 20 第2流路m之流路端132a形成於較軸部ίο之外周凹陷的位 置，且藉由第3流路131來連結流路端130b與流路端132a， 亦可如第3圖所不，將流路端l3〇b、^ 相反侧。藉此，與上述實 1〇之外周的位置，且除絲部Η)之第3流路⑶，取it L第料部保持伽内周之與们分歧勒的 10The rotation of the shaft portion can switch the 1289067 flow path for connecting the respective divergent portions of the apparatus body. The disparity portion is disposed so as to be disposed so that the first branch portion and the second branch portion of the second branch portion are opposed to each other, and the third branch portion is located at the shaft portion 51. It is called the first division of the week and the second division. Position: The road biopsy should rotate the slider 45. It is possible to close all the slabs upright at the same time: the installation = the branching portion includes the branch pipe and the partition wall, and the branch pipe is in a state of being fixed, and the outer circumference of the portion is held, and the partition wall is covered by the gap of the front end of the block. The bomb = Γ is connected to the inside of the branch pipe from the outside, and the following structure is specific: the above-mentioned pre-== in the shaft holding portion, that is, when (4) is useful to connect with the company, ten m + At the position of the moon movement, the opening of the first flow path on the side of the opening of the shaft-shaped passage (4) 3 on the side of the branch portion is 15 X 'the actual shaft portion can be configured as the above-mentioned first! , Zhe, formed in an L shape when watching. , 苐 2 flow path from the plane Simple description of the brother 1 picture is the two-way stopcock perspective view. The second (a) diagram is related to the present embodiment. The hole of the present portion is a section 圏, the first side view. Fig. 4 is a cross-sectional view of a three-way stopcock according to a modification of the embodiment, and a three-way stopcock according to a modification of the embodiment. Fig. 1289067 Fig. 5 is a three-way stopcock related to the first prior art. Sectional view. Figure 6 is a cross-sectional view of a three-way stopcock associated with the second prior art. Fig. 7 is a cross-sectional view showing a three-way stopcock related to a modification of the second prior art. [Embodiment of the Invention] Hereinafter, an embodiment in which the flow path switching device according to the present invention is applied to a three-way stopcock will be described with reference to the drawings. The embodiments and drawings shown below in the present invention are examples of the embodiments of the present invention, and the present invention is not limited thereto. (1) Structure of the three-way stopcock Fig. 1 is a perspective view of the three-way stopcock with the solid cerebral palsy. As shown in the figure, the three-way stopcock has a switching portion 丨 and a main body portion 2, and the shaft portion 1G of the switching portion 1 is inserted into the shaft portion holding portion 2G of the main body portion 2 and held to be rotatable 15 freely. First, the structure of the main body portion 2 into which the switching portion 插入 is inserted will be described. The main body portion 2 includes a hollow cylindrical shaft portion holding portion 20 for holding the shaft portion 1A of the switching portion 及 and is held by the shaft portion. The first branching portion 21, the second branching portion 22, and the third branching portion 23 which are connected to each other and form a branching path of the flow path toward the three-way two-way. The blade shaft holding portion 20 is formed as a hollow chamber into which the insertion hole 20a for inserting the cylindrical shaft _ is formed, and the insertion hole 2_shaped (4) is provided for engaging with the engagement groove 12 of the shaft portion 10 The engagement protrusions (not shown) are combined. 12 1289067 The first knife. P2l and the second branching portion μ are arranged such that the cylindrical tube portion i formed as a flow path is disposed so as to face each other on the outer peripheral surface of the shaft portion holding portion 2, and is erected to be connected to the insertion hole of the shaft portion (four). . Here, the infusion tube connected to the (i) which is not connected to Fig. 4 is dissected in the i-th knife, and the infusion tube connected to the patient not shown is connected to the second sub-portion 22. In the third portion, the manifold 23 includes a branch pipe 23A serving as a flow path, a lid holding portion 23, a partition film 232, and a lid 233, and is a branching path for mixing and injecting the liquid from the outside. > The branch pipe 230 is formed on the outer peripheral surface of the shaft portion holding portion 2, and is formed at 90 with the second branch portion 12 and the second branch portion 22. The angle is erected to the shaft portion holding portion 20. Here, as shown in the enlarged view of Fig. 1, in the field in which the branch pipe 230 is provided in the shaft portion holding portion 2, that is, in the field of opening the side of the shaft portion holding portion 20 of the branch pipe 23〇, When the shaft portion 10 is inserted into a position for communicating the respective branch portions 21, 22, and 23, the shaft portion 10 corresponds to the flow path end (10) of the first flow path 13 and the flow path end 132a of the second flow path 15 132. The position is provided with through holes 2〇〇a, 200b. Thus, the inside of the branch pipe 230 can communicate with the inside of the shaft portion holding portion 20, and in the three-way stopcock, the branch portions 21, 22, 23 can communicate with each other. The lid holding portion 231 is attached to the outer peripheral surface of the shaft portion holding portion 20 in a state of surrounding the branch pipe 230, and has a pair of engaging projections 2310 for holding the lid 233 (only one is shown in Fig. 1). . The separator 23 2 is made of, for example, a disk-shaped silicone rubber having a highly resistant elastomer, and a slit 232a cut in the thickness direction is formed in a central portion thereof. The cover 233 has a pair of engaging portions 13 1289067 2330 (only one of which is shown in FIG. 1) in which the engaging holes 2330a are formed, and is separated from the cover holding portion 232 by the engaging portion 232 via the partitioning film 232. The protrusions 231 are engaged with each other and fixed to the lid holding portion 231. Here, the partition film 232 functions as a sealant to ensure airtightness of the body portion 2 to the outside inside the manifold 230. Further, since the cover 5 233 presses the partition film 232, pressure is applied to both faces of the slit 232a, so that the slit is closed. A guide hole 233a for guiding the front end of the luer needle is disposed in the slit 232a of the cover 233 facing the partition film 232, and a luer needle is inserted through the guide hole 233a, whereby the luer needle can pass through the gap of the separation film 232 The 232a 10 is guided to the inside of the branch pipe 230 to inject the chemical liquid into the branch pipe 230. On the other hand, the switching portion 1 includes a cylindrical shaft portion 1A and a handle portion 11 formed integrally with the end portion of the shaft portion 10 and rotating the shaft portion 10 around the central axis thereof in a ten-shape. . The shaft portion 10 is formed in a circumferential shape of the outer peripheral surface of the outer peripheral surface of the handle portion 1 from the handle portion 1 , and has an engagement groove 12 and an engagement projection (not shown) formed in the shaft portion holding portion 20 of the main body portion 2 . The phases are engaged and rotatably fixed to the body portion 2. Further, the shaft portion 10 is formed with a flow path 13 for allowing the first branch portion 21, the second branch portion 22, and the third branch portion 23 of the main body portion 2 to flow, and to transport a fluid such as a liquid or a chemical liquid. The flow path 13 is composed of a first flow path 130 and a second flow path 132 that are bent at a right angle, and a linear third flow path 131, and the third flow path 131 connects the first flow path 130 and the second flow. The path 132 forms a flow path. When the rotating shaft portion 10 positions the flow path 13 at a position where all of the branch portions 21, 22, and 23 can be communicated, the first flow path 130 serves to connect the third branch portion 23 with the first portion 1413967 The flow path of the L-shape is seen in plan view, and the bent portion thereof is disposed near the central axis of the shaft portion 10, and wherein the first-class road end 13〇a is exposed to the outer peripheral surface of the shaft portion 10 while the other flow path end 130b is disposed at A position that is more concave than the outer peripheral surface of the shaft portion 10. 5 When the rotating shaft portion 1 is located at a position where the flow path 13 can communicate with all of the branch portions 21, 22, and 23, the second flow path 132 is a flow for connecting the third branch portion 23 and the second branch portion 22 The road is the same as the first flow path 130, and has an L-shape as viewed in plan, and the bent portion is disposed near the central axis of the shaft portion 1〇, and the first-stage road end 132a is disposed outside the shaft portion 10 The 10th position where the surface is further recessed is in communication with the third flow path 31, and the other flow path end 13 is disposed to be exposed to the outer peripheral surface of the shaft portion 1〇. The third flow path 131 is a groove extending from the flow path end 130b of the second flow path 13 to the flow path end n2a of the second flow path 132 in a straight line on the outer peripheral surface of the shaft portion 10, and serves as a connection. 1 The role of the flow path 13〇 and the second flow path. By the third flow path 131, even if the switching unit j is rotated from the position shown in FIG. 1 to the position reversed by 180°, the first divergent portion 2i and the second divergent portion can be connected to the first flow. The flow path end 13 of the path 130 is disposed on the outer peripheral surface of the shaft portion 10 on the outer peripheral surface of the shaft portion 10 so as to face each other in the direction of the plane, and on the other hand, the flow path end of the first flow path 13 (10) The flow path ends 20 132aUSe* of the second flow path m are placed side by side and are overlapped when viewed in plan. That is, when switching from the plane to see the correction, and the first! The switching unit described in the prior art is the same, and the flow path 13 is arranged in a z-shape (see the fourth item.) With the above configuration, for example, when the liquid is made to flow from the flow path (10), 130a" As shown in the enlarged view of the flow path 13 of the drawing diagram, the transport liquid 15 1289067 system enters the flow path 131 from the flow path end i3〇b through the flow path 130, and then enters the flow from the flow path end 132a of the flow path 132. The passage 132 then flows out from the flow path end 132b. Therefore, it is possible to suppress the remaining liquid or the like from remaining in the flow path 13 by supplying the liquid from the infusion source. (2) The effect of using the three-way stopcock according to the present embodiment Fig. 2(a) is a cross-sectional view of the three-way stopcock according to the present embodiment, and Fig. 2(b) is a cross-sectional view of the three-way stopcock associated with the comparative example. The enlarged view in Fig. 2(a) It is to be noted that the through holes 2〇〇b and 200a in the shaft holding portion 20 of the three-way stopcock according to the present embodiment are independently provided in the flow path end 130b and the second portion of the first flow path 130. The flow path end 132a of the flow path 132 is opposed to the position. The liquid that flows out from the flow path end 130b is strongly passed through the through hole 200b. Into the branch pipe 230. For the above description, for example, as shown in Fig. 2(b), only one of the through holes 200c for connecting the first flow path 130 and the second flow path 132 with the branch pipe 230 is provided. At this time, the area is larger than the sum of the cross-sectional area of the first flow path 13〇 and the cross-sectional area of the second flow path 132. Therefore, at this time, the flow from the flow path end n〇b in the through hole 2〇〇c The liquid flows into the branch pipe 23〇 while diffusing. Further, since the liquid is also transported from the branch pipe 230 through the through hole 200c to the flow path end 20 132a', the liquid is transported into the through hole 20〇c while flowing into one side, and is formed at the same time. Therefore, the flow in the opposite direction is smaller than that in the second (a) diagram, and the pressure applied to the liquid in the through hole is small. Therefore, the liquid transported from the flow path end 13 is compared with the present embodiment. The related three-way stopcock flows into the inside of the branch pipe 230 more slowly. As a result, there is a possibility that the internal portion 16 1289067 cannot be replaced in the branch pipe 23〇. On the other hand, the three paths related to the present embodiment In the stopcock, since one through hole 2〇0a, 2〇〇b is provided, and each pass is made Each of the holes plays a unique role in the inflow and outflow of the fluid, so the flow of the fluid in each of the through holes is not easily disturbed. 5 As a result, the velocity of the fluid passing through each of the through holes can be increased as compared with the case where the through holes are one. Since the transport liquid strongly flows into the inside of the branch pipe 23, the replacement of the mixed injection chemical liquid can be promoted. Further, each of the through holes 2A, 200b is provided at the flow path end with the first flow path 130. 130b and the flow path end 132a of the second flow path 132 are opposed to each other. Therefore, when the position is shifted from 10 to 10, the flow of the fluid is less likely to be disordered, and the pressure loss is reduced, so that the speed can be further accelerated. The velocity of the fluid in each of the through holes 2〇〇a, 2〇〇b. Here, the area of the through holes 2A, 200b is preferably set to be the same as the opening area of the flow path ends 130b, 132a of the respective flow paths 131, 132. In this way, if the cross-sectional areas of the respective through holes 200a and 200b are formed to be substantially the same as those of the flow path ends i32a and 1513, the pressure applied to the liquid to be transported is further increased, and the transporting liquid can flow intensively through the through-cell 200b. The inside of the branch pipe 230. With the above effects, the chemical solution injected into the inside of the branch pipe 230 by the Luer needle S can be mixed with the transport liquid that has flowed in strongly through the through hole 200b, and then discharged to the flow path end 132a through the through hole 200a. According to the three-way stopcock associated with the present invention, since the two through holes 200a, 200b are separately provided, the transport liquid can be strongly flowed into the inside of the branch pipe 23, and compared with the three shown in Fig. 2(a) The road stopper or the three-way stopcock described in the first and second conventional techniques can replace the chemical solution mixed and injected into the third branching portion 23 more quickly. Furthermore, since the two through holes 200a, 200b can function as the inlet and outlet of the circulating liquid 17 1289067, the flow in the direction can be rectified inside the branch pipe 230 and the flow velocity in the branch pipe 230 can be accelerated. Further, in the flow path 13 of the shaft portion 10, since the transport liquid flows through the entire body, there is no flow path in which the transport liquid or the chemical liquid remains in the switching portion 5 in the first conventional technique. According to the above configuration, even if the chemical liquid is a high-calorie liquid suitable for the culture medium of the bacteria, the chemical liquid can be quickly replaced, and since the possibility of remaining in the third branching portion 23 is lower than in the past, the growth of the bacteria can be suppressed. . Further, from the case where the residual amount of the chemical solution in the third branching portion 23 is small, it is possible to dispense a drug solution having a dose more accurate than each of the conventional techniques. Further, since the opening of the flow path 13 on the outer circumference of the shaft portion 1 is only three places of the flow path ends 130a and 13Gb (132a) and l32b, the shaft portion is rotated 45 in the second (4) drawing. Further, all of the first branching portion 2, the second branching portion 22, and the third branching portion 23 can be closed. Therefore, it is possible to simultaneously close all the divergent portions in the same manner as the three-way live B generally used in the medical field, and it is not the unique operation method of the second conventional technique. Further, (variation) and in the above-described real towel, the flow path end 13a of the first (10) 13G of the scale 1 is formed at a position recessed by the outer circumference of the axial portion ίο, and by the third The flow path 131 connects the flow path end 130b and the flow path end 132a, and as shown in Fig. 3, the flow path ends l3〇b and ^ may be opposite sides. Thereby, the third flow path (3) of the position other than the above-mentioned outer circumference and the wire portion is taken, and the third portion of the material is held by the inner portion of the gamma.
苑形態相同，由於即使將軸部 18 1289067 旋轉180 ’輪送液體亦會從轴部1〇之流路端1鳩通過流路 131流向流路端132a，故可_與習知同樣的操作方法來操 作。又，由於流路端13〇b、132a與通孔200b、200a可不用 透過抓路131而直接連通，故如上述實卿態，於流路131 5 I輸送賴㈣會紐，且可使輸送液體強力地流人分歧 、 & 230内。卩，並可較上述實施形態更加提高藥液的置換速 度。 又苐3 77歧部23可為單純延長分歧管230者，亦可為 使用在流路切換裝置之公知的混合注入口。 _ 〇 又，於與本實施形態相關之流路切換裝置中，雖然以 三路活栓為例來作說明，但亦可如第4圖所示，設為在軸部 保持部20中與第3分歧部23相對之位置設置第4分歧部24之 四路活栓。同樣地，本發明亦可適用於具有五個以上之分 歧部的流路切換裝置。 又於本貝施形悲中，雖然將通過流路之流體以液體 為例來作說明，但在液體以外使氣體及兩者之混合物通過 時亦可得到與本發明同樣的效果。 修 又，於上述實施形態中，雖然軸部1〇中於第丨流路13〇 上方配置第2流路132，但亦可顛倒第丨流路13〇與第2流路 20 m之上下關係。再者，雖然上述實施形態中在與該等第i 流路130及第2流路132之流路端i3〇b、132a相對之位置設置 ， 通孔200a、200b，但若對應各流路端13〇b、132&之數量而 設置通孔200a、200b，則第3分歧部23内之藥液的置換效率 或許會下降，因此不一定要使該等通孔與該等流路相對。 19 1289067 又，於上述實施形態中，雖然第1流路130及第2流路132 從平面看為L字形，但並不限於此，若流路端之位置相同， 則亦可設為直線狀或立體的彎曲形狀。 又’於上述貫施形恶中’雖然各形成一條輛部1 〇之第1 5 流路130及第2流路132，但不限於此，亦可形成多條該等流 路。 又，於上述實施形態中，雖然第1流路13〇與第2流路132 形成為完全獨立而不同的通路，但若本發明之第丨流路13〇 與第2流路132形成實質上不同的通路，則各流路的一部份 10 稍微合流亦可。 與本發明相關之流路切換裝置用在醫療用流路切換裝 置特別有效。 【圖式簡單說明】 第1圖係三路活栓之展開透視圖。 15 第2(a)圖係與本實施形態相關之三路活栓的截面圖，第 2(b)圖係將本體部之孔設為一個時之三路活栓的截面圖。 第3圖係與本實施形態之變形例相關之三路活栓的截 面圖。 第4圖係與本實施形態之變形例相關之三路活栓的截 20 面圖。 苐5圖係與苐1習知技術相關之三路活检的截面圖。 第6圖係與第2習知技術相關之三路活栓的截面圖。 第7圖係與第2習知技術之變形例相關之三路活栓的截 面圖。 20 1289067 【圖式之主要元件代表符號表】 1.. .切換部 2.. .本體部 10…軸部 11.. .手柄部 12.. .卡合溝 13.. .流路 20.. .軸部保持部 20a...插入孔 21…第1分歧部 22…第2分歧部 23…第3分歧部 24…第4分歧部 130…第1流路 130a、130b…流路端 131…第3流路 131b…流路端 132…第2流路 132a...流路端 200a、200b·.·通孔 230.. .分歧管 231.. .蓋保持部 232a...缝隙 233.. .蓋子 233a··.引導孔 800.. .本體部 8(Π、901…第1分歧部 802、 902··.第2分歧部 803、 903…第3分歧部 804.. .分歧管 805、905...分隔膜 805a、905a··.縫隙 806.. .蓋子 806a...孔 820.. .切換部 820a...流路 920.. .切換部 920a...流路 2310…卡合突起 2330.. .卡合部 2330a...卡合孔 5.. .路厄式針頭 A、A’…區域In the same manner, even if the shaft portion 18 1289067 is rotated 180', the liquid will flow from the flow path end 1 of the shaft portion 1 to the flow path end 132a through the flow path 131, so that the same operation method as in the conventional method can be used. To operate. Moreover, since the flow path ends 13〇b and 132a and the through holes 200b and 200a can be directly connected without passing through the gripping path 131, the flow path 131 5 I can be transported to the flow path 131 5 I and can be transported. The liquid is strongly divergent, & 230.卩, and the replacement speed of the chemical solution can be further improved than the above embodiment. Further, the 苐3 77 portion 23 may be a simple extension of the branch pipe 230, or may be a known mixed injection port used in the flow path switching device. Further, in the flow path switching device according to the present embodiment, a three-way stopcock is described as an example, but as shown in FIG. 4, it may be set in the shaft portion holding portion 20 and the third The four-way stopcock of the fourth branching portion 24 is provided at a position opposite to the branching portion 23. Similarly, the present invention is also applicable to a flow path switching device having five or more divisions. Further, in the case of the Bebesch, the fluid passing through the flow path is exemplified by a liquid, but the same effect as the present invention can be obtained by passing a gas and a mixture of the two in addition to the liquid. In the above embodiment, the second flow path 132 is disposed above the second flow path 13A in the shaft portion 1A, but the relationship between the second flow path 13A and the second flow path 20m may be reversed. . Further, in the above-described embodiment, the through holes 200a and 200b are provided at positions facing the flow path ends i3b and 132a of the i-th flow path 130 and the second flow path 132, but corresponding to the flow path ends. When the through holes 200a and 200b are provided in the number of 13〇b, 132&, the replacement efficiency of the chemical solution in the third branching portion 23 may be lowered. Therefore, it is not necessary to make the through holes face the channels. Further, in the above-described embodiment, the first flow path 130 and the second flow path 132 are L-shaped when viewed from a plan view. However, the present invention is not limited thereto, and the position of the flow path ends may be linear. Or a three-dimensional curved shape. Further, although the first and second flow paths 130 and 132 of the vehicle portion 1 are formed in each of the above-described forms, the present invention is not limited thereto, and a plurality of the channels may be formed. Further, in the above-described embodiment, the first flow path 13A and the second flow path 132 are formed to be completely independent and different paths. However, the first flow path 13A and the second flow path 132 of the present invention form substantially For different passages, a portion 10 of each flow path may be slightly merged. The flow path switching device according to the present invention is particularly effective for use in a medical flow path switching device. [Simple description of the diagram] Figure 1 is a perspective view of the three-way stopcock. 15 Fig. 2(a) is a cross-sectional view of the three-way stopcock according to the present embodiment, and Fig. 2(b) is a cross-sectional view of the three-way stopcock in which the hole of the main body portion is set to one. Fig. 3 is a cross-sectional view showing a three-way stopcock according to a modification of the embodiment. Fig. 4 is a cross-sectional view showing a three-way stopcock according to a modification of the embodiment. Figure 5 is a cross-sectional view of a three-way biopsy related to the conventional technique of 苐1. Figure 6 is a cross-sectional view of a three-way stopcock associated with the second prior art. Fig. 7 is a cross-sectional view showing a three-way stopcock related to a modification of the second prior art. 20 1289067 [Main component representative symbol table of the drawing] 1.. Switching part 2.. Main body part 10... Shaft part 11.. Handle part 12... Engagement groove 13.. Flow path 20.. The shaft portion holding portion 20a is inserted into the hole 21, the first branch portion 22, the second branch portion 23, the third branch portion 24, the fourth branch portion 130, the first flow path 130a, 130b, the flow path end 131, ... The third flow path 131b, the flow path end 132, the second flow path 132a, the flow path end 200a, 200b, the through hole 230, the branch tube 231, the cover holding portion 232a, the slit 233. . Cover 233a··. Guide hole 800.. Main body portion 8 (Π, 901... first branch portion 802, 902·. second branch portion 803, 903... third branch portion 804.. branch tube 805 905... separator film 805a, 905a·. slit 806.. cover 806a... hole 820.. switching unit 820a... flow path 920.. switching unit 920a... flow path 2310... Engagement protrusion 2330.. Engagement portion 2330a... Engagement hole 5... Luer type needle A, A'... area
232...分隔膜 21232... separator film 21