201100132 六、發明說明： 【發明所屬之技術領域】 本發明係屬於-種注射連接器，尤其指一種無正負壓 免針式注射連接器，其具有良好氣密效果可避免空氣殘 留以及藥劑逆流。 【先前技術】 傳統針筒注射器係為常見的藥劑施打器具，然而，針 筒注射器具有危㈣’因&需要作回收處s，導致醫療成 〇 本升高。 因此，有人發展出一種無針式注射連接器配合無針式 注射器來施打藥劑，此種器具危險性低’能夠重複使用， 亦可避免大量回收所造成的高昂成本。 然而，現有的針式注射連接器内部留有大量空隙，且 密閉的效果不彰，造成可觀的空氣或藥劑殘留於其中，藥 劑與血液亦不當逆流並殘留於其他内，當下次施打藥劑 D 時，空氣或殘留藥劑會一併以正壓方式被打入患者體内造 成血管不當擴張，使患者產生疼痛感，而施打完畢抽回注 射器時，亦會使血液與藥劑以負壓方式逆流回注射連接器 内，如此往復的運作，造成患者無端承受施打藥劑時因為 血管受正壓擴張所產生之疼痛，同時逆流回之血液或體液 回流至患者體内，亦會造成重複感染。 【發明内容】 本發明人有鐘於傳統無針式注射連接器内部空隙太大 而不當殘留空氣或藥劑且容易使藥.劑或血液逆流，改良其 3 201100132 不足與缺失，進而發明出—種無正負壓免針式注射連接器。 本發明主要目的係提供一種無正負壓免針式注射連接 器，其具有良好氣密效果，可避免空氣或藥劑殘留以及藥 劑或血液逆流。 為達上述目的，本發明係提供一種無正負壓免針式注 射連接器’其包含有：201100132 VI. Description of the Invention: [Technical Field] The present invention relates to an injection connector, and more particularly to a non-positive and negative pressure needle-free injection connector, which has a good airtight effect to avoid air residue and counter-flow of medicament . [Prior Art] Conventional syringe syringes are common medicinal devices, however, syringe syringes are dangerous (four)'required for recovery s, resulting in an increase in medical costs. Therefore, a needleless injection connector has been developed in combination with a needleless syringe for the application of a medicament which is low in risk and can be reused and avoids the high cost of mass recovery. However, the existing needle-type injection connector has a large amount of voids left inside, and the sealing effect is not good, causing considerable air or medicine to remain therein, and the medicament and blood are also improperly flowed back and remain in the other, when the next dose of the medicament D is applied. At the same time, the air or the residual agent will be injected into the patient's body in a positive pressure manner, causing the blood vessel to be improperly expanded, causing pain to the patient, and when the syringe is pumped back, the blood and the medicament will also flow countercurrently under negative pressure. In the back-injection connector, such a reciprocating operation causes the patient to endlessly suffer from the pain caused by the positive pressure expansion of the blood vessel when the medicine is applied, and the blood or body fluid that flows back to the patient body can also cause repeated infection. SUMMARY OF THE INVENTION The present inventors have a small space inside the conventional needleless injection connector, which is too large to leave residual air or medicament, and is easy to counter-flow the medicine or blood, improving the deficiency and deficiency of the 3 201100132, and inventing No positive and negative pressure needleless injection connector. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a positive and negative pressure needle-free injection connector which has a good airtight effect and which avoids air or drug residue and countercurrent flow of medicine or blood. In order to achieve the above object, the present invention provides an un-negative pressure-free needle-type injection connector which includes:
Ο 々-接頭’係具有一管體，在管體上方形成有一容室， 容室具有-上開口以及一底部，在底部上貫穿形成有一藥 液入口在管體底端内形成有一與容室相連通的通道； 一彈性閥，係設置在容室内，具有一内部空間，且彈 性閥以底端封閉容室底部藥液流入口’在彈性閥頂端與底 端上分別形成-上開縫與一下開縫以與内部空間相連通， 上開縫與下開縫預設為密閉狀態，且可撐開而成開孔狀， 下開縫張開時與藥液流入口連通； _雙向導通元件，其中央處分向頂端與底端逐漸縮窄 而令其外形具有斜度，設置於彈性閥的内部空間之中，且 頂端與底端可分別撐開上開縫與下開縫，在雙向導通元件 上形成有一輸液流道，該輸液流道可與撐開的上開缝以及 下開縫相連通；以及 一加藥座，係呈中空，設置於接頭上，而彈性閥頂端 預設封閉該加藥座，其中 無正負壓免針式注射連接器未使用時彈性閥上下 開缝呈密閉狀態而氣密封閉加藥座與藥液流入口。 别述加藥座上形成有一腔室，該上注射口腔室具有一 上注射口以及一下開口，而彈性閥的頂端預設封閉上注射 4 201100132 口。 前述接頭藥液流入口鄰接容室的頂端形成有一凹弧 面，且雙向導通元件底端具一凸藏面以選擇性結合藥液流 入口的凹弧面.。. 前述彈性閥中央處徑向向外突伸有一導引部，該導引 部以可滑動方式接觸加藥座腔室内壁使雙向導通元件能相 對腔室進行垂直線性移動。 前述彈性閥由中央處區隔出一上變形部以及一下變形 ° 部，該上變形部呈錐狀，可受外力垂直壓縮而變形並且於外 力消失後恢復原狀，於上變形部上形成有至少一上皺摺 部。 前述下變形部呈錐形，可受外力垂直壓縮而變形並且 於外力消失後恢復原狀，於下變形部上形成有至少一下皺 摺部。 前述彈性閥内部空間靠中央處形成有一相對應導引部 較位部；雙向導通元件的中央處形成伸有一定位元件以 與彈性閥的定位部相結合。 前述定位部為一定位槽，該定位元件為至少一定位突 塊。 前述彈性閥底端形成有一設置在容室底部上且氣密抵 靠加藥座底端的墊片，該墊片底面上形成有至少一變形 槽。 前述今至内壁形成有一凸肋，加藥座上形成有一凹槽 以與容室内的凸肋相結合。 刖述各至内壁靠上開口處形成有複數定位缺槽，在加 5 201100132 藥座上徑向向外形成有一上蓋以封閉容室上開口，在加藥 座上形成有複數定位齒以與接頭的定位缺槽相互結合。 前述雙向導通元件的輸液流道為一貫孔。 前述雙向導通元件的輸液流道為一至少一剖溝。 本創作另一目的係提供一種無正負壓免針式注射連接 器，其包含有 一接頭，係具有一管體’在管體頂端形成有一容室， 容室具有一上開口以及一底部，在底部上貫穿形成有一藥 〇 液流入口’在管體底端内形成有一與容室相連通的通道； 一彈性閥’係設置在容室内，具有一内部空間，且彈 性閥以底端封閉容室底部藥液流入口，在彈性閥頂端與底 端上分別形成一上開縫與一下開縫以與内部空間相連通， 上開缝與下開縫預設為密閉狀態，且可撐開而成開孔狀， 下開缝張開時與藥液流入口連通； 一雙向導通元件’其中央處分向頂端與底端逐漸縮窄 D 而令其外形具有斜度，設置於彈性閥的内部空間之中，且 頂端與底端可分別撐開上開縫與下開縫，在雙向導通元件 上形成有一輸液流道，該輸液流道可與撐開的上開缝以及 下開縫相連通；以及 一加藥座’係呈中空，設置於接頭上，而彈性閥頂端 預設封閉該加藥座，其中 彈性閥由一上半部以及一下半部所組成，上半部與下 半°卩上分別徑向突伸形成有一定位凸緣，而雙向導通元件 上桎向犬伸形成有一固定凸環，在定位環上、下兩面分別 形成有一環凹槽以分別結合定位凸緣，藉此使定位凸緣共 6 201100132 同夾固固定凸環。 藉由上述技術手段，當彈 形狀時，上開縫與下開縫约呈=不乂外力而維持於預設 外部空氣或藥劑的進入有效p 思者體内藥劑與血液的逆流。 【實施方式】 請參照m三圖，本發明無正負壓免針式注射連 接器的第-實施例一端可與一免針式注射器(9〇)接駁另The Ο 接头-joint' has a tube body, and a chamber is formed above the tube body, the chamber has an upper opening and a bottom, and a liquid inlet is formed in the bottom portion to form a chamber in the bottom end of the tube body. a communicating passage; an elastic valve is disposed in the chamber, has an inner space, and the elastic valve closes the bottom of the chamber with the bottom end of the liquid medicine inlet inlet', respectively, forming a top slit and a bottom end on the elastic valve The slit is opened to communicate with the internal space, and the upper slit and the lower slit are preset to be in a closed state, and can be opened to form an open hole shape, and the lower slit is opened to communicate with the chemical liquid flow inlet; _ double-conducting element, The central portion is gradually narrowed toward the top end and the bottom end to have a slope, and is disposed in the inner space of the elastic valve, and the top end and the bottom end can respectively open the upper slit and the lower slit, respectively on the double-conducting element Forming an infusion flow channel, the infusion flow channel is connectable with the open upper slit and the lower slit; and a dosing seat is hollow and disposed on the joint, and the elastic valve top is preset to close the dosing Block, where there is no positive and negative pressure When the needle-free injection connector is not in use, the upper and lower slits of the elastic valve are sealed, and the drug holder and the drug solution inlet are hermetically sealed. There is a chamber formed on the dosing seat, the upper injection chamber has an upper injection port and a lower opening, and the top end of the elastic valve is preset to close the injection port 4 201100132. The tip of the joint drug solution inlet has a concave arc surface adjacent to the top end of the chamber, and the bottom end of the double-conducting element has a convex surface for selectively combining the concave curved surface of the chemical liquid inlet. A guide portion is protruded radially outward from the center of the elastic valve, and the guide portion slidably contacts the inner wall of the dosing chamber to allow the double-conducting member to move vertically linearly with respect to the chamber. The elastic valve is separated from the central portion by an upper deformation portion and a lower deformation portion. The upper deformation portion has a tapered shape, can be vertically compressed by an external force and deformed, and is restored to the original state after the external force disappears, and at least the upper deformation portion is formed. A wrinkle on the top. The lower deformation portion has a tapered shape, is deformable by vertical compression by an external force, and is restored to its original shape after the external force disappears, and at least a lower wrinkle portion is formed on the lower deformation portion. A corresponding guiding portion is formed at a central portion of the inner space of the elastic valve; a positioning member is formed at a center of the double-conducting member to be combined with the positioning portion of the elastic valve. The positioning portion is a positioning slot, and the positioning component is at least one positioning protrusion. The bottom end of the elastic valve is formed with a gasket disposed on the bottom of the chamber and airtight against the bottom end of the charging seat, and the bottom surface of the gasket is formed with at least one deformation groove. A rib is formed on the inner wall of the present invention, and a groove is formed in the medicinating seat to be combined with the rib in the chamber. A plurality of positioning vacancies are formed in the upper opening of the inner wall, and an upper cover is formed radially outward on the medicinal seat of the 5 201100132 to close the opening on the chamber, and a plurality of positioning teeth are formed on the medicinating seat to connect with the joint The positioning vacancies are combined with each other. The infusion channel of the aforementioned double-conducting element is a consistent hole. The infusion channel of the bidirectional conductive element is at least one groove. Another object of the present invention is to provide a positive-negative needle-free injection connector comprising a joint having a tubular body forming a chamber at the top end of the tubular body, the chamber having an upper opening and a bottom portion. A drug solution inlet is formed through the bottom portion. A passage communicating with the chamber is formed in the bottom end of the tube body. An elastic valve is disposed in the chamber and has an internal space, and the elastic valve is closed at the bottom end. The liquid medicine inlet at the bottom of the chamber forms an upper slit and a lower slit at the top end and the bottom end of the elastic valve respectively to communicate with the inner space, and the upper slit and the lower slit are preset to be sealed, and can be opened. In the shape of an opening, when the lower slit is opened, it is connected with the chemical liquid inlet; a pair of guiding members are gradually narrowed toward the top end and the bottom end by a D-direction element, and the shape thereof has a slope and is disposed in the inner space of the elastic valve. And the top end and the bottom end can respectively open the upper slit and the lower slit, and form an infusion flow channel on the double-conducting element, the infusion flow channel can be connected with the open upper slit and the lower slit; Dosing seat The hollow body is disposed on the joint, and the top end of the elastic valve is preset to close the feeding seat, wherein the elastic valve is composed of an upper half and a lower half, and the upper half and the lower half are respectively radially protruded A positioning flange is formed, and a fixed convex ring is formed on the double-way-through element, and a ring groove is formed on the upper and lower sides of the positioning ring to respectively engage the positioning flange, thereby making the positioning flange a total of 6 201100132 Fix the convex ring with the same clamp. According to the above technical means, when the shape is elastic, the upper slit and the lower slit are about = external force and are maintained at a preset external air or the entry of the medicament is effective against the counterflow of the medicament and blood. [Embodiment] Referring to the m three figure, the first embodiment of the positive and negative pressure needle-free injection connector of the present invention can be connected to a needle-free injector (9〇).
::與-輸液管接驳’輪液管可連接一常駐於患者體内的 針巨’藉此’彳由免針式注射器（9啦過無正負藶免針式 ;主射連接器而向患者施打藥劑。 該無正負壓免針式注射連接器包含有一接頭⑴、一彈 性閥(2)、-雙向導通元件(3)以及一加藥座⑷。 該接頭（1)具有-管體（1〇)。管體（1〇)頂端形成有一容 室（11) ’容室⑴）具有-上開口以及—底部，該底部⑴〇) 為一擋牆，在底部（110)上貫穿形成有一藥液流入口（12), 藥液流入口（12)鄰接容室（11)的頂端處形成一凹弧面 (121) ’在管體（1〇)底端内形成有一與容室（I”相連通的通 道（14)以便與輸液管相連接。此外，容室（11)内壁可形成有 一凸肋（111)，容室（11)内壁靠上開口邊處可形成複數定位 齒（13)該彈性閥（2)係為中空，具有彈性而可受外力變形 並在外力消失後恢復原狀，設置在接頭（1)容室（11)内，並 且彈性閥（2)以底端封閉容室（11)底部（11〇)的藥液流入口 (12)。在彈性閥（2)内形成有一略成錐形的内部空間（21)， 在彈性閥（2)頂端與底端上分別形成一上開縫（211)與一下開 縫（212)以與内部空間（21)相連通，上開縫（211)與下開缝 7 201100132 (212)預設為密閉狀態，且可被撐開而成開孔狀此外下 開縫^以丨對齊容室丨彳”底部幻彳⑴的藥液流入口㈠”而可於 張開時與藥液流入口（12)相連通。彈性閥（2)由中央處區隔 出一上變形部（24)以及一下變形部（25)，該上變形部（24)大 致成錐形且項端呈冠狀，可受外力垂直壓縮而變形並且於 外力消失後恢復原狀，於上變形部（24)上可形成有至少一 呈環狀或是其他形狀的上皺摺部（241)以便加強變形效果。 該下變形部（25)大致呈錐形，可受外力垂直壓縮而變形並 〇 且於外力消失後恢復原狀，於下變形部（25)上可形成有至 少一呈環狀或是其他形狀的下皺摺部（251)以便加強變形效 果。此外，下變形部（25)厚度可薄於上變形部（24)之厚度。 彈性閥（2)中央處徑向向外突伸有一導引部（22)。彈性 閥（2)内部空間（21)靠中央處形成有一相對應導引部（22>的 定位部，該定位部可為一定位槽（221)。在彈性閥（2)底端形 成有一設置在容室（11)底部（11〇)上的墊片（23)。又，彈性 ^ 閥（12)可為相互獨立的—上半部（2〇1)與一下半部（2〇2)相互 組裝而成·》 該雙向導通元件（3)大致呈梭狀，由其中央處分向頂端 與底端逐漸縮窄而令其外形具有斜度，此外，雙向導通元 件（3)底端可具凸弧面以便能緊貼結合藥液流入口的凹弧面 (121)。雙向導通元件（3)密閉設置於彈性閥（2)的内部空間 (21)之中，且頂端與底端可分別撐開上開缝（2^)與下開縫 (212)，在雙向導通元件（3)上形成有一輸液流道，該輪液流 道可與撐開的上開缝（211)以及下開缝（212)相連通，而該輸 液流道可為一貫穿雙向導通元件（3)的貫孔（31)，如第三圖 8 201100132 所示。在雙向導通元件（3)的中央處可形成伸有一定位元件 以便與彈性閥（2)的定位部相結合而避免該雙向導通元件 相對彈性閥（2)產生垂直或水平位移，該定位元件可為至少 一突伸的定位突塊（32)以與彈性閥（2)的定位槽（221)相互結 合。 請復參照第一與第二圖，該加藥座（4)係設置於接頭（^) 之上，可封閉接頭（1)容室（11),且加藥座（4)以底端抵靠彈 性閥（2)墊片（23)。在加藥座（4)上形成有一腔室（41)，該腔 至（41)具有一上注射口以及一下開口，而彈性閥（2)的頂端 預设封閉上注射口並且可於上注射口内滑動，此外，上注 射口可與張開的彈性閥（2)上開縫（211)相連通。腔室（41)内 壁了與彈性閥（2)的導引部（22)接觸並且相對滑動以使彈性 閥（2)内的雙向導通元件（3)能相對腔室（41)保持垂直的線性 移動在加藥座（4)上徑向向外形成有一上蓋（43)以封閉容 室（11)上開口，在加藥座（4)上形成有複數定位齒（431)以與 ❹ 接頭（1)的定位缺槽（13)相互結合並避免加藥座（4)相對接頭 轉動。在加藥座（4)上形成有一凹槽（45)以與容室（11)内的 凸肋（111)相結合β «用復參照第三圖’當免針式注射器（9〇)尚未插入加藥 座（4)的上注射口時’彈性閥（2)頂端的冠狀部封閉上注射 口’且上開縫（211)與下開縫（212)均封閉。 請進一步參照第四圖，當免針式注射器（90)插入上注 射口時’彈性閥（2)底端受到垂直向下力道擠壓，上變形部 (24) ’上開縫（21彳）率先被雙向導通元件（3)的頂端所貫穿揮 開°此時導W部（22)相對腔室（41)内壁垂直滑動並且確保 9 201100132 雙向導通元件（3)垂直滑動。雙向導通元件（3)的輸液流道 與免針式注射器（90)相互連通，令藥劑能流入輸液流道之 中。 請進一步參照第五圖，當免針式注射器（90)持續向下 插入時，下開縫（212)接著被雙向導通元件（3)的底端所貫 穿撐開。此時，免針式注射器（9〇)、加藥座（4)上注射口、 雙向導通元件（3)的輸液流道以及接頭（1)藥液流入口（12)等 四者相互連通，藥液可通過無正負壓免針式注射連接器而 ❹流人患者之中。此外’雙向導通元件（3)底端的凸弧面抵靠 藥液流入口（12)頂端的凹弧面（121)而停止移動，此時雙向 導通元件（3)、墊片（23)以及容室底部（11〇)之間幾乎沒有間 隙，可避免殘藥物或是血液殘留於接頭（彳）容室（彳彳）以及加 藥座（4)腔室（41)之中β 當70成注射程序而移除免針式注射器（90)時，則上開 缝Ρ11)與下開縫（212)依序封閉。而接頭（彳）容室（彳彳）以及 加藥座（4)腔室（41)中殘留的空氣可由接頭（1)與加藥座（4) 的接缝縫隙排出無正負壓免針式注射連接器之外。 請參照第六到第八圖，本創作第二實施例大致與第一 實施例相同，惟彈性閥（2)的上半部（2〇1a)與下半部（2〇2a) 上分別徑向突伸形成有一定位凸緣（205)，而雙向導通元件 (3)上徑向突伸形成有一固定凸環（32)，在定位環（32)上、 下兩面分別形成有一環凹槽（321)以分別結合定位凸緣 (205)，藉此使定位凸緣（2〇5)共同夾固固定凸環（32)。 本發明具有下列優點： 1·在免針式注射器（9〇)未插入注射連接器之前，彈性 201100132 Ο ο 閥（2)不受外力而維持於預設形狀’上開縫（211)與下開縫 (212)均呈氣密封閉狀態，可有效阻絕外部空氣或藥劑的進 入以及患者體内藥劑與血液的逆流。當免針式注射器（9〇) 插入且施打藥劑完畢而自彈性闊（2)上方移除時，受垂直壓 縮的彈性閥（2)迅速循著雙向導通元件（3)的斜度而伸長恢 復原狀，因此’免針式注射器（90)—旦完全與彈性間（2)分 離’上開缝（211)與下開缝（212)則同時完全閉合以便有性 阻絕外來空氣或是藥劑與血液的逆流。藉此技術手段能有 效減少對.患者施打藥劑時所造成的疼痛感。 2.藉由前述機構之設計將可能殘存之空氣、藥液咬逆 流之血液降至最低’使病人於施打本創作時可將正負壓 產生之因素趨近於最小甚至於無。 【圖式簡單說明】 第一圖係本創作第一實施例立體外觀圖。 第二圖係本創作第一實施例立體分解圖。 第三圓係本創作第-實施例接駁一免針式注射器的側 面剖視實施狀態圖。 第四圖係本創作接續第三圖的操作示意圖 第五圖係本創作接續第四圖的操作示意圖 第六圖係本創作第二實施例立體外觀圖。 第七圖係本創作第二實施例立體分解圖。 免針式注射器的側 第八圖係本創作第二實施例接駁一 面剖視實施狀態圖。 【主要元件符號說明】 201100132 (υ接頭 (1 1)容室 (110)底部 (111)凸肋 (12)藥液流入口 (121)凹弧面 (13)定位缺槽 (2)彈性閥 (201)(201a)上半部 (202)(202a)下半部 (205)定位凸緣 (21)内部空間 (211)上開縫 (212)下開縫 (22)導引部 (221)定位槽 (23)墊片 (24)上變形部 (241)上皺摺部 (25)下變形部 (251)下皺摺部 (3)雙向導通元件 (31)貫孔 (31 a)剖溝 (32)定位突塊 (321)環凹槽 (4)加藥座 (41)腔室 (43)上蓋 (431)定位齒 (45)凹槽 (90)免針式注射器 12::With -Infusion tube connection' The wheel tube can be connected to a needle that is resident in the patient's body. This is made by a needle-free syringe (9 啦 over positive and negative needle-free type; main-shot connector The patient applies the medicament. The non-positive pressure needle-free injection connector comprises a joint (1), an elastic valve (2), a double-conducting element (3) and a dosing seat (4). The joint (1) has a tube Body (1〇). The top of the tube body (1〇) is formed with a chamber (11). The chamber (1) has an upper opening and a bottom portion. The bottom portion (1) is a retaining wall running through the bottom portion (110). Forming a chemical liquid inlet (12), the chemical liquid inlet (12) forms a concave curved surface (121) adjacent to the top end of the chamber (11). A chamber is formed in the bottom end of the tubular body (1). (I) connected to the channel (14) for connection with the infusion tube. In addition, the inner wall of the chamber (11) may be formed with a rib (111), and the inner wall of the chamber (11) may form a plurality of positioning teeth at the upper opening edge. (13) The elastic valve (2) is hollow, has elasticity and can be deformed by an external force and is restored to its original state after the external force disappears, and is disposed in the joint (1) chamber (11), and And the elastic valve (2) closes the chemical liquid inlet (12) of the bottom (11〇) of the chamber (11) with a bottom end. A slightly tapered inner space (21) is formed in the elastic valve (2), An upper slit (211) and a lower slit (212) are respectively formed on the top end and the bottom end of the elastic valve (2) to communicate with the inner space (21), and the upper slit (211) and the lower slit 7 201100132 (212) The preset is a closed state, and can be opened to form an open hole shape, and the lower slit is opened to align the liquid chamber inlet (1) of the bottom illusion (1), and can be opened at the time of opening and the liquid medicine inlet (12) Connected. The elastic valve (2) is separated from the central portion by an upper deformation portion (24) and a lower deformation portion (25). The upper deformation portion (24) is substantially conical and the end is crown-shaped. The external force is vertically compressed and deformed, and is restored to the original state after the external force disappears. At least one annular or other shaped upper wrinkle portion (241) may be formed on the upper deformation portion (24) to enhance the deformation effect. The portion (25) is substantially conical, can be deformed by the external force to be vertically compressed, and is restored to the original state after the external force disappears, on the lower deformation portion (25). At least one lower wrinkle portion (251) having an annular shape or other shape is formed to enhance the deformation effect. Further, the thickness of the lower deformation portion (25) may be thinner than the thickness of the upper deformation portion (24). Elastic valve (2) A guiding portion (22) protrudes radially outward from the center. The inner space (21) of the elastic valve (2) is formed at a center portion with a corresponding guiding portion (22), and the positioning portion can be a positioning portion a groove (221). At the bottom end of the elastic valve (2), a gasket (23) is arranged on the bottom (11〇) of the chamber (11). Further, the elastic valve (12) can be independent of each other. The half (2〇1) and the lower half (2〇2) are assembled with each other. The double-conducting element (3) is substantially fusiform, and its shape is gradually narrowed from the center to the top and bottom. In addition, the bottom end of the double-conducting element (3) may have a convex curved surface so as to be in close contact with the concave curved surface (121) of the chemical liquid flow inlet. The double-conducting element (3) is tightly disposed in the inner space (21) of the elastic valve (2), and the top end and the bottom end can respectively open the upper slit (2^) and the lower slit (212) in the double-conducting An infusion channel is formed on the component (3), and the wheel flow channel can communicate with the expanded upper slit (211) and the lower slit (212), and the infusion channel can be a through-conducting element ( 3) The through hole (31), as shown in the third figure 8 201100132. A positioning element may be formed at the center of the double-conducting element (3) for engagement with the positioning portion of the elastic valve (2) to prevent vertical or horizontal displacement of the double-conducting element relative to the elastic valve (2), the positioning element may At least one protruding positioning projection (32) is coupled to the positioning groove (221) of the elastic valve (2). Referring to the first and second figures, the dosing seat (4) is disposed on the joint (^) to close the joint (1) chamber (11), and the dosing seat (4) is bottom end Rely on the elastic valve (2) gasket (23). A chamber (41) is formed on the charging seat (4), the chamber to (41) has an upper injection port and a lower opening, and the top end of the elastic valve (2) is preset to close the upper injection port and can be injected thereon. The inside of the mouth slides, and in addition, the upper injection port can communicate with the open slit (211) of the open elastic valve (2). The inner wall of the chamber (41) is in contact with the guide portion (22) of the elastic valve (2) and is relatively slid so that the double-conducting element (3) in the elastic valve (2) can maintain a vertical linearity with respect to the chamber (41). Moving on the charging seat (4), an upper cover (43) is formed radially outward to close the opening in the chamber (11), and a plurality of positioning teeth (431) are formed on the charging seat (4) to be connected with the ❹ joint ( 1) The positioning notches (13) are combined with each other and the rotation of the filling seat (4) relative to the joint is avoided. A groove (45) is formed on the dosing seat (4) to be combined with the rib (111) in the chamber (11). β «With the reference to the third figure', when the needle-free injector (9〇) has not been When the upper injection port of the drug supply seat (4) is inserted, the crown portion of the top end of the elastic valve (2) closes the upper injection port' and both the upper slit (211) and the lower slit (212) are closed. Please refer to the fourth figure. When the needle-free injector (90) is inserted into the upper injection port, the bottom end of the elastic valve (2) is pressed by the vertical downward force, and the upper deformation part (24) is opened (21彳). It is firstly traversed by the top end of the double-conducting element (3). At this time, the guide W portion (22) slides vertically with respect to the inner wall of the chamber (41) and ensures that the 9 201100132 double-conducting element (3) slides vertically. The infusion channel of the bi-directional element (3) communicates with the needle-free injector (90) to allow the agent to flow into the infusion channel. Referring further to Figure 5, when the needle-free injector (90) is continuously inserted downward, the lower slit (212) is then traversed by the bottom end of the bi-directional element (3). At this time, the needle-free injector (9〇), the injection port of the drug-filling seat (4), the infusion channel of the bi-directional element (3), and the connector (1) the drug solution inlet (12) are connected to each other. The drug solution can be drained into the patient by a positive-negative pressure-free needle-injection connector. In addition, the convex arc surface of the bottom end of the double-conducting element (3) stops moving against the concave arc surface (121) at the top end of the chemical liquid flow inlet (12), at this time, the double-conducting element (3), the gasket (23) and the volume There is almost no gap between the bottom of the chamber (11〇), which can prevent residual drug or blood from remaining in the joint (彳) chamber (彳彳) and the filling chamber (4) chamber (41). When the needle-free injector (90) is removed from the procedure, the upper slit 11) and the lower slit (212) are sequentially closed. The air remaining in the joint chamber (彳彳) and the chamber (41) of the dosing seat (4) can be discharged from the joint gap between the joint (1) and the filling seat (4) without positive and negative pressure. Outside the injection connector. Referring to the sixth to eighth figures, the second embodiment of the present invention is substantially the same as the first embodiment except that the upper half (2〇1a) and the lower half (2〇2a) of the elastic valve (2) have respective diameters. A positioning flange (205) is formed on the protruding portion, and a fixing convex ring (32) is formed on the double-conducting element (3), and a ring groove is formed on the upper and lower surfaces of the positioning ring (32). 321) to respectively engage the positioning flanges (205), thereby causing the positioning flanges (2〇5) to jointly clamp the fixing collars (32). The present invention has the following advantages: 1. Before the needle-free injector (9〇) is inserted into the injection connector, the elastic 201100132 Ο ο valve (2) is maintained in the preset shape 'slotted (211) and under the external force without external force The slits (212) are in a hermetically sealed state, which can effectively block the entry of external air or medicament and the counterflow of the medicament and blood in the patient. When the needle-free syringe (9〇) is inserted and the drug is applied and removed from the elastic width (2), the vertically compressed elastic valve (2) quickly follows the inclination of the double-conducting element (3). Restored to its original shape, so the 'needle-free syringe (90) is completely separated from the elastic (2)'. The upper slit (211) and the lower slit (212) are completely closed at the same time to sexually block external air or medicament. The countercurrent of blood. This technique can effectively reduce the pain caused by the application of the drug to the patient. 2. By the design of the above-mentioned mechanism, the air remaining in the air and the liquid can be minimized to the minimum. This enables the patient to approach the minimum or even the factor of positive and negative pressure in the creation of the script. BRIEF DESCRIPTION OF THE DRAWINGS The first drawing is a three-dimensional appearance of the first embodiment of the present creation. The second drawing is an exploded perspective view of the first embodiment of the present creation. The third embodiment of the present invention is a side view of a side view of a needle-free syringe. The fourth figure is a schematic diagram of the operation of the third figure of the present invention. The fifth figure is the operation diagram of the fourth figure of the present creation. The sixth figure is a three-dimensional appearance of the second embodiment of the present creation. The seventh drawing is a perspective exploded view of the second embodiment of the present creation. Side of the needle-free injector The eighth diagram is a cross-sectional view of the second embodiment of the present invention. [Main component symbol description] 201100132 (υ joint (1 1) chamber (110) bottom (111) rib (12) chemical liquid inlet (121) concave curved surface (13) positioning missing groove (2) elastic valve ( 201) (201a) upper half (202) (202a) lower half (205) positioning flange (21) inner space (211) upper slit (212) lower slit (22) guide (221) positioning Slot (23) gasket (24) upper deformation portion (241) upper wrinkle portion (25) lower deformation portion (251) lower corrugated portion (3) double-conducting element (31) through hole (31 a) 32) Positioning protrusion (321) Ring groove (4) Dosing seat (41) Chamber (43) Upper cover (431) Positioning tooth (45) Groove (90) Needle-free injector 12