201125606 , » 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種低回壓免針組合及其裝置，尤 指-種應用於醫療工具、可輸血或輸液之低回針= 合及其裝置。 【先前技術】 請參閱第-目，習知之加藥管1 a為—中空管體， 具有一加藥口 1 1 a，該加藥口 1 1 a處塞入有一‘體 1 f a ’ d塞體]2 a為-軟性物質，當醫護人員要注 射藥物時，先將藥物經由一注射裝置2 a抽取吸入， 將注射裝置2 a之針頭2 1 a刺人塞體！ 2 a而至加藥 管1 a中’推動注射裝置2 a之推桿2 2 a即可將季物 施打入加藥管].…然而針頭21a為一銳= 構，因此冒醫護人員在使用注射裝置2 a時，可能會不 小心被針頭2 1 a刺傷，若針頭2 i a不乾淨則會造成 ，染，因此若能設計出不需要針頭2丄a即可加藥之加 樂管1 a ’則可避免醫護人員受到感染的機會，增加使 用上的安全性，且使料之針頭2丨a必須丢棄，增加 成本負擔。再者，利用注射裝置2 a之針頭2 1 a將藥 物直接注射於人體内，若注射過快，容易造成病人之不 適，另外拔出注射袋置2 a時，亦會產生空氣回流壓力， 造成疼痛感。 緣疋，本發明人有感於上述缺失之可改善，乃特潛 心研究並配合學理之利，終於料—種設計合理且有 效改善上述缺失之發明。 4/17 201125606 【發明内容】 Μ主要目的’係提供—種低回壓免針組合及 兴 即 ，且較不會造成病人之不適與疼痛残。 組合==目的，本發明提供-種低回二 邻之、帛、t # 、从體，其具有一貫通該殼體頂部、頂 二通道之内壁凸設有多數個凸肋；-彈性體，201125606, » VI. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a low back pressure needle-free combination and a device thereof, and particularly to a low-return needle for medical tools, blood transfusion or infusion. And its equipment. [Prior Art] Please refer to the first item, the conventional feeding tube 1 a is a hollow tube body having a dosing port 1 1 a, and the dosing port 1 1 a is inserted with a 'body 1 fa ' d The plug body] 2 a is a soft substance. When the medical staff wants to inject the medicine, the medicine is first inhaled through an injection device 2 a, and the needle of the injection device 2 a is pierced into the body! 2 a to the dosing tube 1 a 'push the injection device 2 a push rod 2 2 a to push the season into the medicated tube.....but the needle 21a is a sharp = structure, so the medical staff When using the injection device 2 a, it may be accidentally stabbed by the needle 2 1 a. If the needle 2 ia is not clean, it will cause and dye. Therefore, if the needle can be designed without the need for the needle 2丄a, the Jiale tube 1 can be added. a 'can avoid the opportunity for medical personnel to be infected, increase the safety of use, and the needle 2丨a must be discarded, increasing the cost burden. Furthermore, the needle 2 1 a of the injection device 2 a is used to directly inject the medicine into the human body. If the injection is too fast, the patient may be uncomfortable, and when the injection bag is pulled out for 2 a, air return pressure is also generated, resulting in air pressure. feeling of pain. In the meantime, the inventors felt that the above-mentioned deficiencies could be improved, and they were concentrating on research and cooperation with the interests of academics, and finally expected that the inventions were designed reasonably and effectively to improve the above-mentioned defects. 4/17 201125606 [Summary of the Invention] The main purpose of Μ is to provide a combination of low back pressure and needle-free combination, and it will not cause discomfort and pain. Combination == purpose, the present invention provides a low-refraction two-neighbor, 帛, t #, slave body having a plurality of ribs protruding from the inner wall of the top of the casing and the top two passages;
之通道内/該彈性體具有-貫通該彈性體 邛.-彈驳"V ’該彈性體封閉一端之内壁設有一凸 構設於該彈性體之容置空間内；一刺破結 該彈簧上，該凸部抵靠於該刺破結構之-開刺破結構具有至少—開孔及—流道，該 °又、Μ刺破結構的一端部且連通該流道，該流道 體結構之底部；以及—連接結構，其連接於該殼 本發明另提供—種低回壓免針組合裝置，包括有： :殼體，其具有一貫通該殼體之頂部及底部之通 、，该通道之内壁凸設有多數個凸肋； 一無性體’其設於該殼體之通道内’該彈性體具有 内，性體底部之容置空間，該彈性體封閉一端之 丨1壁S又有一凸部； 一彈簧，其設於該彈性體之容置空間内； =刺破結構，其穿設於該上，該凸部抵靠於該 破:構之一端部之外壁，該刺破結構具有至少一開孔 及一流道，該開孔設於該刺破結構的一端部且連通該流 5/17 I ' 201125606 道，該流道貫通該刺破結構之底部； 一連接結構，其連接於該殼體之底部；以及 一「注射裝置，其設於該殼體之頂部，該注射裝置具 /主射頭，3亥》主射頭伸入於該通道内，且該注射頭壓 細°亥彈性體與該彈簧，該刺破結構之-端部刺穿該彈性 體之頂部，該刺破結構之開孔位於該注射頭内。 本♦明具有以下有益的效果： 1、 注射時不需使用針頭，故無針頭的使用缺點， 可增加使用上的安全性，且節省成本。 2、 彈性體封閉一端之内壁設有凸部’該凸部抵靠* 於刺破結構之-端部之外壁，當被壓縮的彈性體及彈脊 ㈣性回復力回料’可避免因回彈過快增加空氣回流 壓力，減輕病人疼痛感。 、3、殼體之凸肋與彈性體變形的部分為點接觸，可 減少彈性體回彈時與殼體内壁間的摩擦力，避免益法回 彈的情形。 為使更進-步了解本發明之特徵及技術内容，請參 閱以下有關於本發明之詳細制與關，然而_圖式· 僅供參考與說明用，並非用來對本發明加以限制者。 【實施方式】 請參閱第二圖至第五圖，本發明係提供—種低回 壓免針組合，係應用於醫療工具上，用以輸血或輸液， 該低回壓免針組合包括：一殼體i、一彈性體2、一 彈簧3、一刺破結構4以及一連接結構5。 · 在本實施例中，該殼體i為中空圓柱體，具有一通 6/17 201125606 道1 1、多數個凸肋1 2、一第一結合部1 3、—第二 結合部1 4及-第-^位部！ 5。該通道丄i貫通殼體 1頂部及底部。由殼體2頂部至底部，該通道1i之第 一空間1 1 1係漸縮延伸，該通道丄1之第二空間工工 • 2係漸擴延伸（如第五圖所示）。該些凸肋1 2係縱向 延伸，且相互間隔環繞凸設於殼體1之第二空間i王2 之内壁上，用以減少彈性體2回彈的摩擦力。該第一 結合部1 3位於殼體丄之一端部，其外壁環設有多數 • 個螺牙結構1 3 1，該些螺牙結構1 3 1為外螺牙。 該第二結合部i 4位於殼體1之另一端部，該第二結 合部1 4為凸環。該第一定位部i 5亦為凸環，凸設 於殼體1之底部。 該彈性體2為中空之矽膠，外形呈圓柱狀。彈性 體2設於殼體丄之通道i ，具有一容置空間2 十。、-凸部22及-底盤23。該容置空間2 1貫通 =性體2之底部，該凸部2 2環設於彈性體2封閉一 _ 纟而之内壁，且凸部2 2抵靠於該刺破結構4之一端部 之外壁。该底盤2 3位於彈性體2之底部，該底盤2 3之頂部及底部分別環設有一第一凹槽2 3丄及一第 二凹槽2 3 2。 該彈簧3容設於彈性體2之容置空間2 1内，用 • 以七供彈性體2被壓縮時的彈性回復力。 忒刺破結構4為針管，其穿設於該彈簧3上。該 刺破結構4具有一流道4 1及至少一開孔4 2，該流 道4 1貫通刺破結構4之底部。在本實施例中，該刺 201125606 , 破結構4的一端部設有二相對之開孔4 2，該二開孔 42連通流道41。 在本實施例中’該連接結構5具有一第三結合部 5 1、一谷置槽5 2、一管道5 3及一第四結合部5 4 ’該第三結合部5 1為凸環，位於連接結構5之一 端部，尺寸略大於殼體2之第二結合部1 4，該第三 結合部5 1與第二結合部1 4干涉配合’使連接結構 5連接於殼體1之底部。該容置槽5 2位於第三結合 部5 1圍繞的範圍内，殼體1之第二結合部1 4容設 於容置槽5 2。該管道5 3連通刺破結構4之流道4 1。該第四結合部5 4位於連接結構5之另一端部， 具有多數個螺牙結構5 4 1，可用以連接。又，該容 置槽5 2之内壁還凸設有一第二定位部5 i，該第 二定位部5 1 1相對應於彈性體2之第二凹槽2 3 2 且卡設於第二凹槽2 3 2内，該殼體1之第一定位部 1 5相對應於彈性體2之第一凹槽2 3丄且卡設於第 一凹槽2 3 1内，使該彈性體2被定位於殼體丄之通 道1 1内。 請參閱第六圖及第七圖，本發明另提供一種低回 壓免針組合裝置’包括有：一殼體1、一彈性體2、 一彈簧3、一刺破結構4、一連接結構5以及一注射 裝置6。該殼體1、彈性體2、彈簧3、刺破結構4 及連接結構5之結構與上述說明大致相同，在此不再 贅述。 該注射裝置6設於殼體1之頂部，注射裝置6具 201125606 有一注射頭6 ][及一螺接部6 2，該注射頭6 i伸入 於通道1 1内，並壓縮該彈性體2與彈簧3。彈性體 2被壓縮的同時會產生變形，彈性體2變形的部分抵 靠於殼體1之凸肋1 2。該刺破結構4之頂端刺穿彈 性體2之頂部’並伸入於注射頭61，使刺破結構4 • 之開孔4 2位於注射頭Θ 1内，便可將血液或液體由 注射裝置6注射，經開孔4 2進入流道4 1，沿著流 道4 1至管道5 3而至下方的輸液管，最後進入人體。 • 請參閱第八圖，本實施例與上述實施例不同之處 在於.该連接結構7為一直管，該連接結構7具有一 呈圓^狀之管體7 1及一結合部7 2，該結合部7 2 位於管體7 1之-端，該結合部72與殼體工之第二 結合部1 4干涉配合。 請參閱第九圖，本實施例與上述實施例（第八圖） 不同之處在於：該連接結構8為一γ形管，該連接結 構8具有一呈「Υ」字形之管體8 1及一結合部8 2， •該結合部8 2位於管體8 1之-端，該結合部8 2與 殼體1之第二結合部i 4干涉配合。 凊參閱第十圖，本實施例與上述實施例（第三圖） =同之處在於：該連接結構5之底部進一步設有一取 藥座9，該取藥座9具有一穿刺管9 1、一盤體9 2 及二^接部9 3，該穿刺管9 1穿設於盤體9 2上， ?刺管9 1之一端呈針狀，可穿刺藥瓶工〇以抽取藥 劑。該盤體9 2係方便使用者施力。該二卡接部9 3 凸設於穿刺管9 1之另一端部，該二卡接部9 3卡接 9/17 201125606 > » 於連接結構5之第四結合部5 4内。 杳二參閱第十一圖並配合第十圖，本實施例與上述 证第十圖）不同之處在於：由盤體9 2向下彎折 嘴成有一相對之卡勾9 4，可用以夾持藥瓶1〇。 。參閱第十二圖，本實施例與上述實施例不同之 社於，忒連接結構1〇1為一計量筒上蓋，該連接 . :才101具有-貫通的結合部10 11、-貫通的輸 、：1 〇 1 2及-貧通的排出口工〇 1 3，該結合部1 口 1 1與殼體1之第二結合部工4干涉配合’該輸液 1 2了連接一上輸液管（圖未示），該排出口 1 鲁 〇 1 ^係用以排出計量筒（圖未示）内之空氣。 凊參閱第十三圖及第十四圖，本實施例與上述實 施例不同之處在於：該連接結構1 0 2為-三通閥， 該連接結構1 0 2具有—閥體]_ 〇 2 〇及一開關i 〇 2 1，忒閥體1 〇 2 〇具有相互連通之一結合部工〇 2〇1、一第一管路logo。及一第二管路1〇2〇 3:該開關1 〇 2 1具有一指示部工〇 2 1 1及一樞 接。P 1 0 2 1 2，該指示部1 〇 2 1 1位於樞接部1籲 〇 2 1 2之一端，呈箭頭狀’用以指示關閉之管路。 5亥樞接部1 〇 2 1 2樞設於閥體1 〇 2 0内，藉由設 於樞接部1 〇 2 1 2上之通孔1 〇 2 1 3以及旋轉該 開關1 0 2 1，以選擇性地連通結合部1 〇 2 〇 1與 第一管路1 0 2 0 2或該結合部1 〇 2 0 1與第二管 路 1 0 2 0 3。 本發明低回壓免針組合及其裝置具有下列優點： 10/ 17 201125606 、l、注射時不需使用針頭，故無針頭的使用缺點， 可增加使用上的安全性，且節省成本。 ^ 2、彈性體2内設有凸部2 2，該凸部2 2抵靠於 «亥刺破結構4之一端部之外壁。當注射聢置6自殼體 1分離時，被壓縮的彈性體2及彈簧3因彈性回復力 口彈凸部2 2可緊貼於刺破結構4之外壁，避免因 回彈過快增加空氣回流壓力，減輕病人疼痛感。 3、威體1内壁上的凸肋1 2與彈性體2變形的部 分為點接觸，可減少彈性體2回彈時與殼體丄内壁的摩 擦力’避免無法回彈的情形。 惟，以上所述為本發明之較佳可行實施例，非因 此即偈限本發明之專利範圍，故舉凡運用本發明說明 書及圖式内容所為之等效結構變化，均同理包含於本 發明之範圍内，合予陳明。 【圖式簡單說明】 第一圖為習知加藥管之使用狀態示意圖。 苐一圖為本發明低回壓免針組合之立體圖。 第三圖為本發明低回壓免針組合之立體分解圖。 第四圖為本發明低回壓免針組合之剖視分解圖。 第五圖為本發明低回壓免針組合之剖視圖。 第六圖為本發明低回壓免針組合裝置之剖視圖（一 第七圖為本發明低回壓免針組合裝置之剖視圖（二）。 第八圖為本發明低回壓免針組合第二實施例之立體分 解圖。 第九圖為本發明低回壓免針組合第三實施例之立體分 解圖。 11/17 201125606 第十圖為本發明低回壓免針組合第四實施例之立體分 解圖。 第 圖為本發明低回壓免針組合第五實施例之立體 分解圖。 第十一圆為本發明低回壓免針組合第六實施例之立體 分解圖。 第十二圖為本發明低回壓免針組合第七實施例之立體 圖。 第十四圖為本發明低回壓免針組合第七實施例之立體 分解圖。 【主要元件符號說明】 [習知] 1 a加藥管 1 1 a加藥口 1 2 a塞體 2 a注射裝置 2 1 a針頭 2 2 si推桿 [本發明] 1殼體 1 1通道 1 1 1第一空間 1 1 2第二空間 1 2凸肋 1 3第一結合部 12/17 201125606 1 3 1螺牙結構 1 4第二結合部 1 5第一定位部 2彈性體 2 1容置空間 2 2凸部 2 3底盤 2 3 1第一凹槽 φ 232第二凹槽 3彈簧 4刺破結構 4 1流道 4 2開孔 5連接結構 5 1第三結合部 5 1 1第二定位部 • 5 2容置槽 5 3管道 5 4第四結合部 5 4 1螺牙結構 6注射裝置 6 1注射頭 6 2螺接部 6 2 1螺牙結構 13/17 201125606 7連接結構 7 1管體 7 2結合部 8連接結構 8 1管體 8 2結合部 9取藥座 9 1穿刺管 9 2盤體 9 3卡接部 9 4卡勾 1 0藥瓶 1 0 1連接結構 1 0 1 1結合部 1 0 1 2輸液口 1 0 1 3排出口 1 0 2連接結構 1 0 2 0閥體 1 0 2 0 1結合部 10202第一管路 1 0 2 0 3第二管路 1 0 2 1開關 1 0 2 1 1指示部 1 0 2 1 2枢接部 1 0 2 1 3通孔The inside of the passage/the elastic body has a through-the elastic body -.- 弹 & V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V The spiking structure has at least an opening and a flow passage, and the spurs pierce one end of the structure and communicates with the flow channel. The flow path body structure a bottom portion; and a connecting structure connected to the shell. The present invention further provides a low back pressure needle-free combination device, comprising: a housing having a passage through the top and bottom of the housing, The inner wall of the channel is convexly provided with a plurality of ribs; an asexual body is disposed in the passage of the casing. The elastic body has an inner space, a receiving space at the bottom of the body, and the elastic body closes one end of the wall S a protrusion; a spring disposed in the accommodating space of the elastic body; a piercing structure penetrating thereon, the protrusion abutting against the outer wall of the one end of the broken body The broken structure has at least one opening and a first-class channel, and the opening is disposed at one end of the piercing structure and communicates with the Flow 5/17 I '201125606, the flow path is through the bottom of the piercing structure; a connecting structure is connected to the bottom of the casing; and an "injection device is provided on the top of the casing, the injection The main head of the device/main shot, 3 hai, protrudes into the channel, and the injection head presses the elastic body and the spring, and the end of the piercing structure pierces the top of the elastic body, The opening of the puncture structure is located in the injection head. The invention has the following beneficial effects: 1. The needle is not required for injection, so there is no disadvantage of using the needle, the safety in use can be increased, and the cost is saved. 2. The inner wall of the closed end of the elastic body is provided with a convex portion 'the convex portion abuts against the outer wall of the end portion of the piercing structure, and when the compressed elastic body and the elastic ridge (four) are restored, the material can be avoided. The bombing speed increases the air return pressure and reduces the pain of the patient. 3. The convex rib of the shell is in point contact with the deformed part of the elastic body, which can reduce the friction between the elastic body and the inner wall of the shell during the rebound of the elastic body, and avoid the benefit method. The situation of rebound. In order to make further progress, understand the special features of the present invention. Please refer to the following for details of the present invention. The following is a detailed description of the present invention. However, the drawings are not intended to limit the scope of the invention. In the fifth figure, the present invention provides a low back pressure needle-free combination for use in a medical tool for blood transfusion or infusion, the low back pressure needle-free combination comprising: a housing i, an elastomer 2, a spring 3. A piercing structure 4 and a connecting structure 5. In the present embodiment, the casing i is a hollow cylinder having a passage 6/17 201125606 lane 1 1 , a plurality of ribs 1 2, a first combination a portion 1 3, a second joint portion 14 and a -th portion; 5. The passage 丄i penetrates the top and bottom of the casing 1. From the top to the bottom of the casing 2, the first space 1 1 of the passage 1i The 1 series is gradually extended, and the second space of the channel 丄1 is extended by the 2 series (as shown in the fifth figure). The ribs 1 2 extend longitudinally and are spaced apart from each other to surround the inner wall of the second space i king 2 of the housing 1 for reducing the frictional force of the elastic body 2 rebound. The first joint portion 13 is located at one end of the casing, and the outer wall ring is provided with a plurality of threaded structures 133, and the threaded structures 133 are outer threads. The second joint portion i 4 is located at the other end of the casing 1, and the second joint portion 14 is a convex ring. The first positioning portion i 5 is also a convex ring protruding from the bottom of the casing 1. The elastic body 2 is a hollow silicone rubber and has a cylindrical shape. The elastic body 2 is disposed in the passage i of the casing, and has an accommodation space of two. - a convex portion 22 and a chassis 23. The accommodating space 21 penetrates through the bottom of the body 2, and the protrusion 2 2 is annularly disposed on the inner wall of the elastic body 2, and the convex portion 2 2 abuts against one end of the puncturing structure 4. Outer wall. The chassis 23 is located at the bottom of the elastic body 2. The top and bottom of the chassis 23 are respectively provided with a first recess 23 丄 and a second recess 232. The spring 3 is accommodated in the accommodating space 2 1 of the elastic body 2, and is used for the elastic restoring force when the elastic body 2 is compressed. The puncture structure 4 is a needle tube that is passed through the spring 3. The piercing structure 4 has a first-class channel 41 and at least one opening 4 2 which penetrates the bottom of the piercing structure 4. In the present embodiment, the thorn 201125606, one end of the broken structure 4 is provided with two opposite openings 4 2, and the two openings 42 communicate with the flow path 41. In the present embodiment, the connecting structure 5 has a third joint portion 51, a valley groove 5 2, a pipe 5 3 and a fourth joint portion 5 4 '. The third joint portion 51 is a convex ring. Located at one end of the connecting structure 5, the size is slightly larger than the second joint portion 14 of the casing 2, and the third joint portion 51 and the second joint portion 14 are interference-fitted to connect the connecting structure 5 to the bottom of the casing 1. . The accommodating groove 52 is located in a range surrounded by the third joint portion 51, and the second joint portion 14 of the casing 1 is accommodated in the accommodating groove 52. The pipe 53 is connected to the flow passage 41 of the piercing structure 4. The fourth joint portion 5 4 is located at the other end of the connecting structure 5, and has a plurality of screw structures 514, which can be connected. Moreover, a second positioning portion 5 i is protruded from the inner wall of the accommodating groove 52 , and the second positioning portion 51 1 corresponds to the second groove 2 3 2 of the elastic body 2 and is disposed in the second concave portion. In the slot 2 3 2 , the first positioning portion 15 of the housing 1 corresponds to the first recess 23 丄 of the elastic body 2 and is locked in the first recess 213, so that the elastic body 2 is It is located in the channel 1 1 of the casing. Referring to the sixth and seventh figures, the present invention further provides a low back pressure needle-free combination device comprising: a casing 1, an elastic body 2, a spring 3, a piercing structure 4, and a connecting structure 5. And an injection device 6. The structure of the housing 1, the elastic body 2, the spring 3, the piercing structure 4, and the connecting structure 5 is substantially the same as that described above, and will not be described herein. The injection device 6 is disposed at the top of the housing 1. The injection device 6 has an injection head 6 ] [ and a screw portion 6 2 . The injection head 6 i protrudes into the channel 11 and compresses the elastic body 2 . With spring 3. The elastic body 2 is deformed while being compressed, and the deformed portion of the elastic body 2 abuts against the convex rib 12 of the casing 1. The top end of the puncturing structure 4 pierces the top portion ' of the elastic body 2 and extends into the injection head 61, so that the opening 4 2 of the puncturing structure 4 is located in the injection head Θ 1 to allow blood or liquid to be injected from the injection device 6 injection, through the opening 4 2 into the flow channel 4 1, along the flow channel 4 1 to the pipe 5 3 to the lower infusion tube, and finally into the human body. The difference between the present embodiment and the above embodiment is that the connecting structure 7 is a straight tube, and the connecting structure 7 has a tubular body 7 1 and a joint portion 7 2 . The joint portion 7 2 is located at the end of the pipe body 71, and the joint portion 72 is interference-fitted with the second joint portion 14 of the casing. Referring to the ninth figure, the embodiment is different from the above embodiment (the eighth figure) in that the connecting structure 8 is a γ-shaped tube, and the connecting structure 8 has a tubular body 8 1 in a "Υ" shape and A joint portion 8 2, the joint portion 8 2 is located at the end of the pipe body 8 1 , and the joint portion 8 2 is in interference fit with the second joint portion i 4 of the casing 1 . Referring to the tenth embodiment, the embodiment is the same as the above embodiment (third figure). The bottom of the connecting structure 5 is further provided with a take-up seat 9 having a puncture tube 9 1 . A disc body 9 2 and a second joint portion 9 3 are disposed on the disc body 9 2 , and one end of the stab tube 9 1 is needle-shaped, and the pill bottle can be pierced to extract the medicine. The disc body 9 2 is convenient for the user to apply force. The two latching portions 9 3 are protruded from the other end of the puncture tube 9 1 , and the two latching portions 9 3 are engaged with the second joint portion 5 4 of the connecting structure 5 . Referring to FIG. 11 and the tenth figure, the difference between this embodiment and the above-mentioned certificate is that the disk body 9 2 is bent downward to form an opposite hook 9 4 , which can be used for clamping. Hold the medicine bottle 1〇. . Referring to the twelfth embodiment, the present embodiment is different from the above embodiment in that the 忒 connection structure 〇1 is a metering cylinder upper cover, and the connection 101 has a through joint 10 11 , a through transmission, :1 〇1 2 and - the poor discharge outlet work 1 3, the joint portion 1 1 1 and the second joint portion 4 of the casing 1 interfere with the fit 4 'the infusion 1 2 is connected to an upper infusion tube (Figure Not shown), the discharge port 1 is used to discharge the air in the metering cylinder (not shown). Referring to the thirteenth and fourteenth drawings, the present embodiment is different from the above embodiment in that the connecting structure 102 is a three-way valve, and the connecting structure 10 2 has a valve body _ 〇 2 〇 and a switch i 〇 2 1, 忒 valve body 1 〇 2 〇 has a joint portion of the work 2 〇 1, a first pipeline logo. And a second pipeline 1〇2〇 3: the switch 1 〇 2 1 has an indicating unit 2 1 1 and a pivot. P 1 0 2 1 2, the indicating portion 1 〇 2 1 1 is located at one end of the pivoting portion 1 〇 2 1 2 and is in the shape of an arrow to indicate the closed conduit. The 5H pivotal joint 1 〇2 1 2 is pivoted in the valve body 1 〇20, by the through hole 1 〇 2 1 3 provided on the pivot joint 1 〇 2 1 2 and rotating the switch 1 0 2 1 To selectively connect the joint 1 〇2 〇1 with the first line 1 0 2 0 2 or the joint 1 〇2 0 1 and the second line 1 0 2 0 3 . The low back pressure needle-free combination and the device thereof have the following advantages: 10/ 17 201125606, l, the needle is not needed for injection, so there is no disadvantage of using the needle, the safety in use can be increased, and the cost is saved. 2. The elastic body 2 is provided with a convex portion 2 2 which abuts against the outer wall of one end portion of the «Hard piercing structure 4. When the injection device 6 is separated from the housing 1, the compressed elastic body 2 and the spring 3 can be closely attached to the outer wall of the piercing structure 4 due to the elastic restoring force, and the air is prevented from increasing the air due to the rebound. Back pressure reduces the pain of the patient. 3. The rib 1 2 on the inner wall of the core 1 is in point contact with the deformed portion of the elastic body 2, which can reduce the frictional force with the inner wall of the casing when the elastic body 2 rebounds to avoid the situation in which it cannot rebound. However, the above is a preferred embodiment of the present invention, and thus the scope of the present invention is not limited thereto, and equivalent structural changes made by using the present specification and the contents of the drawings are equally included in the present invention. Within the scope of the agreement, Chen Ming. [Simple description of the diagram] The first figure is a schematic diagram of the state of use of the conventional medicated tube. The first figure is a perspective view of the low back pressure needle-free combination of the present invention. The third figure is an exploded perspective view of the low back pressure needle-free combination of the present invention. The fourth figure is a cross-sectional exploded view of the low back pressure needle-free combination of the present invention. The fifth figure is a cross-sectional view of the low back pressure needle-free combination of the present invention. Figure 6 is a cross-sectional view of the low back pressure needle-free combination device of the present invention (a seventh figure is a cross-sectional view (2) of the low back pressure needle-free combination device of the present invention. The eighth figure is the second low back pressure-free needle combination of the present invention. The ninth figure is an exploded perspective view of the third embodiment of the low back pressure needle-free combination of the present invention. 11/17 201125606 The tenth figure is the three-dimensional embodiment of the low back pressure-free combination of the fourth embodiment of the present invention. The figure is an exploded perspective view of the fifth embodiment of the low back pressure needle-free combination of the present invention. The eleventh circle is an exploded perspective view of the sixth embodiment of the low back pressure needle-free combination of the present invention. The perspective view of the seventh embodiment of the low back pressure and needleless combination of the present invention. The fourteenth embodiment is a perspective exploded view of the seventh embodiment of the low back pressure and needleless combination of the present invention. [Explanation of main component symbols] [General knowledge] 1 a plus Medicine tube 1 1 a dosing port 1 2 a plug body 2 a injection device 2 1 a needle 2 2 si push rod [invention] 1 housing 1 1 channel 1 1 1 first space 1 1 2 second space 1 2 Rib 1 3 first joint 12/17 201125606 1 3 1 screw structure 1 4 second joint 1 5 first set Part 2 Elastomer 2 1 accommodating space 2 2 convex part 2 3 Chassis 2 3 1 First groove φ 232 Second groove 3 Spring 4 Puncture structure 4 1 Flow path 4 2 Opening 5 Connection structure 5 1 Third Joint portion 5 1 1 second positioning portion • 5 2 accommodating groove 5 3 pipe 5 4 fourth joint portion 5 4 1 screw structure 6 injection device 6 1 injection head 6 2 screw portion 6 2 1 screw structure 13 / 17 201125606 7 connection structure 7 1 pipe body 7 2 joint portion 8 connection structure 8 1 pipe body 8 2 joint portion 9 take-up seat 9 1 puncture pipe 9 2 disk body 9 3 snap portion 9 4 hook 1 0 medicine bottle 1 0 1 connection structure 1 0 1 1 joint 1 0 1 2 infusion port 1 0 1 3 discharge port 1 0 2 connection structure 1 0 2 0 valve body 1 0 2 0 1 joint 10202 first line 1 0 2 0 3 Second line 1 0 2 1 switch 1 0 2 1 1 indication part 1 0 2 1 2 pivot part 1 0 2 1 3 through hole