M290425 八、新型說明： k 〔新型所屬之技術領域〕 本創作涉及醫療器械領域中的注射器，尤其涉及一種一次性使用 的安全注射器。 〔先前技術〕 眾所周知，注射器為一種常用的醫療器具。為防止交叉感染，注 參射器的一次使用性越來越受到人們的重視，但是現有的注射器其自身 般邓具有自^壞性的保濩結構，從而使得現有的注射器在使用性能 上並不是嚴格意義上的「-次性」，而可在人為意識作反覆使用，給交 叉感染留下隱患，容易引起疾病的傳播。另外，現有的⑽器在注射 完畢後的處理雜巾，外露_針頭料織周_人，造成新的交 叉感染路徑。 中國專利縣9825G22G.6的安全注㈣，由靖筒、針頭組件、 春卡合座、推杆、及卡頭等組成。其中，卡合座位於注射器的前端，針 .頭，與卡合座的前端組合。卡合座後端有—卡合孔。卡頭設置在推 杆酬。當推杆向注射筒前端推進至接近最前端時，卡頭與卡合座產 ^卡2。當推杆向後拔出時，卡合座連同針頭組件—同被拉至針頭的 谷納室内，以防止真體刺傷人體，達到—次性使用的目的。但是，由 於該注射ϋ設計結構不合理，存在著當注射完畢後，葯液殘留量大， 密封不嚴等技術缺陷，其產品使用性能不夠穩定。 在W0 02/087669的專利申請中也公開了一種安全注射器，包括 M290425 針官、針管套、針管座、密封元件、彈簧。在注射完成後具有自動破 机主射的功月b。但疋邊注射g的結構過於複雜，增力口了生產成本。 另外该結構也會產生驗大量朗的缺陷。社，該安全注射器在使 用時’虽注射動作完成後，在醫護人員尚未將針頭從患者體内拔出前， 針頭就會自動從患者體崎出並進人針肋，從而給患者妓極大的 痛苦。因此，實用性較差。 φ 〔新型内容〕 摘作的目岐針對現纽射騎存制缺陷，提供—種具有保 ^結構且药液靖徹底的—絲制的安全注射器。 .形成供及一種一次性使用的安全注射器，包括—針筒，其前端 在該針職上安裝針頭部分，該針頭部份包括：針管座、針管套、 Κ ’撕管套的後有圓_㈣，射 在所鱗管套的通財； 推，，該推杆係設置在針筒内；該推杆的前端具有頂環； 活基，設置在推杆的前端； 费封鎖環，設置在針管座的末端部； 其特徵在於··該頂環的内壁面設 後端圓柱形台階的外端面相配合，當頂縣一凸起與針管套 凸起與_心咖 獅離後，利用該 同針管-起進入到針Z摩擦力使針官套能夠隨著推杆的回拉動作連 M290425 本創作的注射ϋ進-步包括設置在真統後端的推杆支座，鄕杆 支座包括有限位址推槽、裝配槽、及鎖槽及設置在該推杆中間的 杆上設置有至少一個卡爪。 本創作的注射器在裝配時，該卡爪對應推杆支座的裂配槽，使 爪順利通過推杆支座，推杆支座套於推杆外，使推杆不能推 ^活塞設置該推杆前端形成推杆組件，將所述的推杆组件套裝 筒内，將所述的推杆組件的推杆支座卡裝於針筒體手托—^， 2成針筒體組件，所述的推杆只推凸台與推杆支座的限位止推样對 應’防止推杆的頂環因意外受力推動密封鎖環向前滑動，使注射 毀。所述的針筒體組件的針頭座與針頭部分相卡合，組合為: 功能的安全注射器。 ；、〜、有自室又 本創作的注射器由於纽射完麟，活塞與 射器進行保護性的自毁，真正達到一次使用性的目的。對正個注 〔實施方式〕 宾咖 杆活基3、針頭部分4、推杆支座6。推的 ㈣T推杆2的前端部。推杆活塞3的外徑最大部分盘針tu的 』吻合且可沿内壁縱向移 加工時針頭庙n 具有針碩座η，在 u。這部她η㈣懒料4钱在針頭座 I知技術與現有的注射相似，在此不作詳細說明。 M290425 如圖2二所示，針頭部分4包括針管座41、針套座42、針管43、 密封鎖環44。 如圖2、圖3所示，針管座41的中心為貫通的空腔411，空腔411 此谷納針管套42且允許針管套42沿縱向滑動。在針管座Μ後端部的 端面與針管座41 一體延伸有中空的圓柱體415，圓柱體415與針管座 1同：’其内徑與密封鎖環44的外徑為緊配合，其高度大於密封鎖 衣44问度的兩倍。圓柱體415的外圓柱面稱為圓錐面。在圓板體 415與針官座41連接處的外圓周面上設置有外螺紋413。在推杆2的 動下為了防止針管套42向前滑動，在針管座41的空腔前端 具有向中心收縮的卡擋46。 册如圖2、圖4所示’針管套42為中空狀，其中心部份形成有縱向 貝，的通孔421。在針管套42的後端形成徑向突出的圓柱型台階似。 針管43安褒在針管套42的通孔421巾，其底面與針管套42的底面 427相平齊’進一步減少了在注射時葯液的殘留。針管尖似突出針 S套42外，便於注射。針管43與針管套42相固定連接，本實施例為 相黏合二通孔421前端的直徑呈變化狀的，由以下5個通孔組成：首 先’由前端面423向内形成圓柱形通孔似，圓柱形通孔概向内延 伸形成圓錐形通孔425，圓錐形通孔425向内延伸形成球形通孔概， ;、儿孔426向内延伸形成圓柱形通孔429，最後，圓柱开》通孔奶 向内延伸形成圓柱形通孔428。其中，通孔概為上述5個通孔中直 控最小的，其與針管43的外徑相同，兩者為緊配合。球形通孔概 的中心直徑與圓柱形通孔424的直徑相同，而其兩端直徑分別與圓柱 M290425 =孔429及圓錐形通孔425的小端直徑相同，上述5個通孔 7通孔似其他部分的直徑。上述變化直徑的設計是為了使解 ”針官套42在黏合點膠時，膠水能咖利的進入通孔辦、热、 426、429的内壁面，並在球形通孔 更牢固的被黏合在通㈣。心堆積，使針管43能夠 ^ 2所示，密封鎖環44糊環狀，安裝在針管套42後端部的 =形口階422的外端面上，並且卡在針管座41的空腔4ΐι的後端 =軸观卡固在針管套42後端部的圓柱形台階 二43與針管座41之_封，另-方面使針管套42 (連同 2铜定安裝在針管座41上。其外週面為從對著頂環Μ的一端 直k逐漸縮小的圓錐面。在本實施例中 套42^4,, 不夏赠為了減小密封鎖環44與針管 ㈣及針&座41之晴擦力，可減小密封鎖環44的_針管套 部=ΓΓ物422綱_物41咖411的後端 積’如圖5Α、_及圖5C所示，可在其内壁和/或外壁 每於:中2個凹槽441 ’凹槽441可為各種不同的幾何形狀’在本 貝施例中為圓弧形。 針管座4丨與·丨前端的針頭座u之間具有相互配合的連接結 :如:6所示’針筒i為中空的_ ’在其前部與針管座41的連 伸形成針頭座n。針頭座u為與針筒i同心的中空· :^ 内壁面⑴上設置為内螺紋；其後端的内壁㈣為 固、隹面。在針統1後端的内壁面上形成有圓錐面12。 M290425 如圖3、圖6所示，針管座41與針頭座11之間的配合連接結構 可為職連接結構：在本實施例中，針頭座n勒螺紋，針管座Ο 為外螺紋。當然，針頭座11為外艘料Λ| ^ 馬外螺紋，針管座41為内螺紋。針頭座 η後端的内壁㈣的圓錐面與針管座41的圓柱體415的外圓柱面 416的圓錐面相配合。由此，斜答片 、十e座41與針頭座u連接時能夠產生 緊密的配合，並且在針管座41與針頭座η相互旋緊後，針管座41 的空腔411的末端部能夠對密封鎖環料產生徑 44更加緊密地安裝在針管套 ^更山封鎖％ ㈣末端部之間。 後端部台階422與針管座41的空腔 林創作另-實施例中，上述的配合連接 構。針頭座11的前端⑴為嵌 財裟結 該卡口相配合的卡齒。 ，’十官座41的後端413為與 =的上述結構在裝配時’先將針頭 官座^通過其配合結構與針筒、组件 ^子後再將針 如圖7Α，_、圖7C、圖—^頁座11裝配在一起。 細與密封物相對應，用=== 成有卿21。 洳推進。頂環21在太眘A B 中的氆封鎖環44向 使針管套42(連同針管 严白422的夕K面接觸， 作用下，隨著推杆2的回^起212與台階422的外端面之間的摩 的回拉而平穩的進入針筒1内。因此，凸起^ M290425 可以為任意數量，任意形狀，任惫 意位置’只要舰_台階422的 ^^TM%21 任 擦力的大小只要_使針管套42===而產生摩擦力，該摩 柳内即可。在本實婦，凸==)跟隨推杆2一同進入 設置的三個她12fl度且完全=^在_21的_面上均布 形。細、繼2可^7^’。购_面為三角 向分布，其長度與頂環21的高度相=體212石頂環21縱 4、ΛΛη 相4 個冷體212的三條棱邊所圊 ::的直徑略小於密封鎖環 Μ α Μ的高料於或大於密封鎖環44的高度，在本實施 密^ W卿魏Μ _ ° 2⑽境略小於 封鎖％ 44的外徑’或頂環21的外表面也可為錐 、 π：：----- 盘針^ΓΓ15的内圓柱面產生摩擦，只有頂環21的棱體212 師I 台階422的外圓柱面發生摩擦，產生摩捧力。告 趣頂環21推離針管套42的後端部台_時，即可解： 、、’十g套42的約束。頂環21的三個 ’、 _台階422的外端面相接觸^㈣”心套42·部的圓 在磨捧力作用下= 使針管套42 (連同針管43) 24者推杆2的回拉而平穩的進人針筒1内。在頂環 的w端邮23上開設妓少—個細2ιι，本實關射為對粹分 药液=缺，注射時使葯液通過缺0而流入針管43内，避免了 、衣21除可紅述的圓環形外，還可以由至少—各頂柱 在该頂柱的内表面設置有凸起212，該頂柱可以為柱狀體，也可 M290425 以為部份圓環體，在相鄰兩個頂柱之間具有供药液通過的間隙。 如圖2、圖7A、圖7B圖、圖7C、圖7D所示，推杆" 為的推杆相似’其後端微注射用手柄24，前端安裝有活塞 接㈣為十字筋結構。為了與推杆支座6相配合，在連接杆烈2 =:的伊端設有四個止推凸台22。在推杆2 _設有卿21，；； 衣U與㈣鎖環44相對應。在連接杆25靠近頂環a的—端、 肋結構上形成有至少-個卡爪28。在本實施例中為兩個與推杆^ ί ^，位針概編增樹的卡錢。她為在連接 /的兩相對的十字筋上形成開口方向朝向頂環2ι —獻開口角声 =的v字術286，德σ 28_糊財_糊，以ς 针爪28受外力時細286處的應力集中而導致當卡爪28受到外力 連接杆25的饱浦σ 286的底物。其在十 助交線處形成内角邊282與遠離十字筋交線的-側形成外角邊283Γ ^⑽細21 —_询練_。自外角伽向外延 开Μ梯形爪體284。自然狀態下，爪體⑽最外端285到十字筋六 直最外端到十字筋交線的距離，當爪體撕4 、卜角邊283的》力時，卡爪28外角邊⑽ _邊娜相平行，且不接觸時，爪㈣心 字:交線的距離等於連接杆25最外端到十字筋交線的距離。在靠二 其開口的大小與位置只要保證注射器正常工作的推杆2強度即 可，口㈣姆3的爾姆㈣6崎，料嫩射 12 ⑧ M290425 完成後，在針筒1外將推杆2折斷。 =圖2、圖6、圖7A，圖8八、圖8B、圖％所示，為了防止推杆2 勺貝衣21似外又力推動密封鎖環44向前滑動，在針筒1的後端設置 有具有限位功能的推杆支座6。推杆支座6為中間具有通孔Μ的圓柱 體、。通孔61的直徑略大於推杆2的直徑，使推杆2能夠插入通孔η 中並此在通孔中滑動。推杆支座6設置在針筒丨内部，中空圓柱體的 外壁面63為圓錐面，而簡丨與推杆支座6的酶面_妾觸的内 釀壁面12也為與外壁面63相配合的圓錐面，且内壁面12的小端直徑小 於外壁面63的大端直徑。由此，可以使推杆支座6卡固在針筒】的後 .會被推人針筒1内。推杆支座6的外壁面⑽向外延伸形成環形 大起，％形突起67與針筒i的内壁面13配合，使推杆支座6在裝 配後不能向針筒外方向移動，裝配後推杆支座6被固定在針筒】的開 口=，不能移動。在推杆支座6設置在針筒1外部的中空圓柱部份的 h錯少—個止推槽62、至少—個裝配槽65及至少一個 θ 貫_中，為兩個相隔180度對稱的止推槽62、兩個相 隔別度對稱的裝配槽65及4個間隔設置在止推槽62與裝配 上在推杯/\個槽均勻分布在推杆支座6的中空圓柱部份的内壁面 =。在推杆2後端的相應位置處_周面上設置有_與止推槽似、 恤㈣22°物咖顿峨當醫護人員 ί取献而向前拉動推杆2時，將推杆2的止推凸台22對著推杯 支座6的止推槽62，向前推動推杆2，止推凸台22將會受到止推槽干 13 M290425 62的阻擔而不能繼續向前推進，從而保障了 ，、傻娜料斜面，該斜_ 反’其末端與推杆支座6中空的_的内壁 的長度只要保證當止推凸台22完全進入其内時，匕 鎖環44完全推離針管套42後端部的圓柱形台階422即可1將密封 裝配，在推杆支座6的軸向開 為了便於 施例中為2個她⑽輕_槽697由。在本實 緊配合方式曝針筒丨的後端部。裝 7 防，推杆2砸21郷杆支座 卡爪28對應裝配槽 槽65相酬，卡爪28受㈣力的作用，1的當=8與裝配 =’當爪體 284 _ 285 _筋 = 鳊到十字筋交線的距離時，卡爪2 接杆25取外 推杆购幽杆2===^6— 止推槽62相配合，防止推杆 '。止推凸台22與 向前滑動。當恤㈣，只嶋卜劲_封鎖環44 推動推杆2，使止推凸台22對;=:推槽62相錯開後 的鎖槽66進行推動，即可進行tl妓座6的中空圓柱部份的内壁上 當注射完畢後，隨著推杆 拉回針筒！内，推杆2繼^退’針管套42 (連同針管切被 内推杆2、_向後移動，卡爪28與推杆支座㈣内環面^ M290425 64接觸，受擠壓，卡爪 端285到十字筋交線的 向内移動’當额測最外 時，卡爪退馳接杆25最外端到十字筋統的距離 相綱，使推杆2不能心Γ中，此時活塞3與推杆支座6 推杆2 d ^ 而爪體284完全進入鎖槽66中，使 向轉，㈣爾2伽針筒1内壁 别後移動。再推杆2被鎖住的同時可以 1" 頂㈣上開設有缺口 211，使頂产2 =的嶋狀相吻合，且在 91 ^ 21外。卩的葯液都可從缺口 211處 進入_21内部並注人針㈣内,避免肅的殘留。 如圖m及麵所示’在本創作的第：實施例中，頂㈣還可 2下述形狀’在推杆2的前端形成有圓柱體23a，在圓柱魏的 =周面繼少—個W种所她㈣，糾，在圓柱 M a的外陳置有第-實施例所述的頂環21或頂柱。相應的，在針 管套42後端部的圓柱形台階422上開設有與圓柱體撕相對應配合的 凹槽429a ’凹槽他的深度娜主體铷的高度相同。凹槽她斑 凸起批為緊配合，為了減少葯液的殘留，了_的高度小於圓柱體 如的高度，只要其能夠保證當圓柱體如完全插入凹槽魏内時， 卿21能夠將設置在針管套42後端部的圓柱形台階422上的密封鎖 環44推離台接422即可。只當注鼾a 士。士 田射7成時，圓柱體23a完全插入凹槽 ⑧ 4298内，此時’圓柱體既上的凸起212與凹槽429a的内壁面相接 M290425 .觸’通過兩者之間的摩擦力，能夠使針管套42及針管43隨著推杆2 .2細私料1内，職可輯鄕-實關所述的自毁安全功 、、:上所陳，本創作為—種可㈣式自回行為。由於本創作的針管 ★的細回是在針官尖431由惠者體内拔出後進行的，因此不給患者帶 來j苦’很好的克服奶02/087669公開的注射器在針管彈回時會給患 者帶來痛苦的缺陷；並且也很好的克服了現有技術中由於結構的不合 ⑩理而造成葯液大量殘留的問題。 以上所述僅為本創作實施例的具體說明，並非用來限制本創作的 專利範圍，其他所有運用本創作的技術特徵所做的等效變換，均包含 在本創作的專利範圍内。 M290425M290425 VIII. New description: k [New technical field] This creation relates to syringes in the field of medical devices, and in particular to a disposable safety syringe. [Prior Art] As is well known, a syringe is a commonly used medical device. In order to prevent cross-infection, the disposable use of the injection device has received more and more attention, but the existing syringe has its own self-destructive structure, so that the existing syringe is not in use performance. In the strict sense of "--sub nature", it can be used repeatedly in human consciousness, leaving hidden dangers to cross-infection and easily causing the spread of disease. In addition, the existing (10) device handles the diaper after the injection, and the exposed _ needle is woven into the circumference, causing a new cross-infection path. The safety note (4) of China Patent County 9825G22G.6 consists of Jingjing, needle assembly, spring card seat, push rod, and chuck. The engaging seat is located at the front end of the syringe, and the needle head is combined with the front end of the engaging seat. The rear end of the engaging seat has a snap hole. The chuck is set at the push bar. When the push rod is advanced to the front end of the syringe, the chuck and the card seat are produced. When the push rod is pulled back, the engaging seat together with the needle assembly is pulled into the chamber of the needle to prevent the body from stabbing the human body for the purpose of secondary use. However, due to the unreasonable design structure of the injection, there are technical defects such as large residual amount of the liquid after the injection, and the sealing is not strict, and the product performance is not stable enough. A safety syringe is also disclosed in the patent application of WO 02/087669, including the M290425 needle, needle sleeve, needle hub, sealing element, spring. After the injection is completed, there is a power b of the automatic broken main shot. However, the structure of the injection of g at the edge is too complicated, and the production cost is increased. In addition, the structure will also produce a large number of defects. The safety syringe is used. 'While the injection is completed, the needle will automatically come out from the patient's body and enter the needle rib before the medical staff has pulled the needle out of the patient's body. This will cause great pain to the patient. . Therefore, the practicality is poor. φ [New Content] The purpose of the excerpt is to provide a safety syringe with a silk-proof structure that has a structure and a thorough chemical solution. Forming a safety syringe for use with a single use, comprising a syringe, the front end of which is mounted with a needle portion on the needle, the needle portion comprising: a needle tube seat, a needle tube sleeve, and a Κ 'Tear sleeve after the circle _ (4) Shooting the money in the scale tube sleeve; Push, the push rod is set in the syringe; the front end of the push rod has a top ring; the living base is arranged at the front end of the push rod; The end portion of the needle tube seat; characterized in that: the inner wall surface of the top ring is provided with the outer end surface of the rear end cylindrical step, and when the top of the county is raised with the needle tube sleeve and the _ heart lion, the use With the needle tube - the friction into the needle Z allows the needle sleeve to be connected with the pull rod of the push rod. M290425 The injection step of the creation includes a push rod support disposed at the rear end of the real system. The mast support includes The finite address push slot, the mounting slot, and the lock slot and the lever disposed in the middle of the push rod are provided with at least one jaw. When the syringe of the present invention is assembled, the claw corresponds to the splitting groove of the push rod support, so that the claw passes smoothly through the push rod support, and the push rod support is sleeved outside the push rod, so that the push rod cannot push the piston to set the push. The front end of the rod forms a push rod assembly, and the push rod assembly is set in the cylinder, and the push rod support of the push rod assembly is clamped to the syringe body support, and the needle assembly is The push rod only pushes the boss to correspond to the limit thrust sample of the push rod support. 'The top ring of the push rod is prevented from being pushed forward by the accidental force to cause the seal lock ring to slide forward, so that the injection is destroyed. The needle holder of the syringe body assembly is engaged with the needle portion and combined into: a functional safety syringe. ;, ~, there is a self-portrait and the creation of the syringe due to the new shot, the piston and the gun for protective self-destruction, truly achieve the purpose of one-time use. Alignment [Embodiment] The guest coffee stick base 3, the needle portion 4, and the push rod holder 6. Push (4) the front end of the T push rod 2. The outer diameter of the push rod piston 3 is the largest part of the disc needle tu and can be longitudinally moved along the inner wall. The needle temple n has a needle base η, at u. This η (four) lazy 4 money in the needle seat I know the technology is similar to the existing injection, and will not be described in detail here. M290425 As shown in FIG. 2, the needle portion 4 includes a needle hub 41, a needle hub 42, a needle tube 43, and a sealing lock ring 44. As shown in Figures 2 and 3, the center of the needle hub 41 is a through cavity 411 which is a gutta-perna tube sleeve 42 and allows the needle cannula 42 to slide longitudinally. A hollow cylinder 415 extends integrally with the end face of the rear end portion of the needle hub and the needle hub 41. The cylinder 415 is identical to the needle hub 1: 'the inner diameter thereof is tightly matched with the outer diameter of the sealing lock ring 44, and the height is greater than Seal locks are twice as long as 44. The outer cylindrical surface of the cylinder 415 is referred to as a conical surface. An external thread 413 is provided on the outer circumferential surface of the joint between the disc body 415 and the needle seat 41. In order to prevent the needle sleeve 42 from sliding forward under the movement of the push rod 2, a latch 46 that is contracted toward the center is provided at the front end of the cavity of the needle hub 41. As shown in Figs. 2 and 4, the needle sleeve 42 is hollow, and a central portion thereof is formed with a through hole 421 of a longitudinal shell. A cylindrical step which is radially protruded is formed at the rear end of the needle hub 42. The needle tube 43 is placed in the through hole 421 of the needle cannula 42 and its bottom surface is flush with the bottom surface 427 of the needle cannula 42 to further reduce the residual of the chemical liquid at the time of injection. The needle tip is like a protruding needle S sleeve 42 for easy injection. The needle tube 43 is fixedly connected to the needle tube sleeve 42. In this embodiment, the diameter of the front end of the phase-bonding two-way hole 421 is changed, and is composed of the following five through holes: firstly, a cylindrical through hole is formed inwardly from the front end surface 423. The cylindrical through hole extends inwardly to form a conical through hole 425. The conical through hole 425 extends inward to form a spherical through hole. The hole 426 extends inward to form a cylindrical through hole 429. Finally, the cylindrical opening The through hole milk extends inwardly to form a cylindrical through hole 428. The through hole is the smallest of the above five through holes, and is the same as the outer diameter of the needle tube 43, and the two are tightly fitted. The central diameter of the spherical through hole is the same as the diameter of the cylindrical through hole 424, and the diameter of both ends is the same as the diameter of the small end of the cylinder M290425 = the hole 429 and the conical through hole 425, respectively, and the above five through holes 7 are similar to the through holes. The diameter of the other parts. The above-mentioned change diameter is designed so that when the "needle sleeve 42" is glued, the glue can enter the inner wall surface of the through hole, heat, 426, 429, and is firmly bonded in the spherical through hole. (4). The core is stacked, so that the needle tube 43 can be shown in FIG. 2, and the sealing lock ring 44 is annularly attached, and is mounted on the outer end surface of the shape-shaped step 422 at the rear end portion of the needle tube sleeve 42, and is caught in the empty space of the needle tube holder 41. The rear end of the cavity 4 = is axially fixed to the cylindrical step 23 of the rear end portion of the needle cannula 42 and the sealing portion of the needle cannula 41, and the needle cannula 42 (along with 2 copper is fixed to the needle cannula 41). The outer peripheral surface is a conical surface which is gradually narrowed from the end k facing the top ring 。. In the present embodiment, the sleeve 42^4 is not provided in order to reduce the seal lock ring 44 and the needle tube (4) and the needle & The clear rubbing force of 41 can reduce the back end product of the sealing ring 44 of the sealing ring 44 = the back end product of the object 422 class _ object 41 411 ' as shown in Fig. 5 Α, _ and Fig. 5C, on the inner wall and / Or the outer wall is: 2 grooves 441 'the groove 441 can be a variety of different geometric shapes' in the embodiment of the present invention is a circular arc shape. The needle holder 4 丨 and · 丨 front needle seat u Coupling joints with mutual cooperation: as shown in Fig. 6, 'the syringe i is hollow _' extends at its front portion with the needle hub 41 to form a needle hub n. The needle hub u is hollow concentric with the syringe i: ^ The inner wall surface (1) is provided with an internal thread; the inner wall (4) of the rear end is a solid and a weir surface. A conical surface 12 is formed on the inner wall surface of the rear end of the needle system 1. M290425 As shown in Fig. 3 and Fig. 6, the needle holder 41 and The mating connection structure between the needle holders 11 can be a working connection structure: in the embodiment, the needle holder n is threaded, and the needle holder Ο is externally threaded. Of course, the needle holder 11 is an outer material Λ | ^ horse external thread, The needle hub 41 is internally threaded. The conical surface of the inner wall (4) of the rear end of the needle hub n is matched with the conical surface of the outer cylindrical surface 416 of the cylindrical body 415 of the needle hub 41. Thus, the oblique sheet, the ten-seat 41 and the needle holder u A tight fit can be produced when the connection is made, and after the needle hub 41 and the needle seat η are screwed together, the distal end portion of the cavity 411 of the needle cannula 41 can be more closely attached to the sealing ring material generating diameter 44 in the needle cannula sleeve. Mountain blockage is between (4) the end portion. The rear end step 422 and the cavity of the needle cannula 41 In the other embodiment, the above-mentioned mating connection structure. The front end (1) of the needle holder 11 is a latching engagement of the bayonet. The rear end 413 of the ejector 41 is the same structure as the = During assembly, the needle seat is first assembled through the matching structure with the syringe and the assembly, and then the needle is assembled as shown in Fig. 7Α, _, Fig. 7C, and Fig. 11. The seal corresponds to the seal. With === Cheng Youqing 21. Push forward. The top ring 21 in the Taishen AB in the 氆 氆 环 44 44 44 向 使 使 使 使 42 42 42 42 42 42 ( ( ( ( ( ( 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 The returning between the returning 212 and the outer end surface of the step 422 smoothly enters the inside of the syringe 1. Therefore, the protrusion ^ M290425 can be any number, any shape, and any position can be used as long as the size of the rubbing force of the ship_step 422 is as long as _ causes the needle sleeve 42 === to generate friction. Moliu can be. In this real woman, convex ==) follows the putter 2 together to enter the set of three of her 12fl degrees and completely = ^ on the _21 _ face evenly. Fine, followed by 2 can be ^7^'. The _ surface is distributed in a triangular direction, the length of which is the height of the top ring 21 = the body 212, the top ring 21, the longitudinal 4, the ΛΛη phase, the three edges of the four cold bodies 212:: the diameter is slightly smaller than the sealing ring Μ The height of α Μ is higher or larger than the height of the sealing lock ring 44. In the present embodiment, the outer diameter of the sealing ring 44 is slightly smaller than the outer diameter of the blocking ring 44 or the outer surface of the top ring 21 may also be a cone, π ::----- The internal cylindrical surface of the disc pin 15ΓΓ generates friction, and only the outer cylindrical surface of the prism 212 of the top ring 21 is rubbed, resulting in a frictional force. When the top ring 21 is pushed away from the rear end of the needle sleeve 42, it is possible to solve the constraint of ", ten" 42. The outer end faces of the three ', _steps 422 of the top ring 21 are in contact with each other. (4) The circle of the core sleeve 42 is under the action of the grinding force = the needle sleeve 42 (along with the needle tube 43) is pulled back by the pusher 2 And the smooth entry into the syringe 1. In the top ring of the w-end post 23 on the opening of a small - a thin 2 ιι, this real off shot for the quintessence of liquid medicine = lack, when the injection makes the liquid flow through the lack of 0 In the needle tube 43, in addition to the circular shape of the garment 21, the protrusions 212 may be disposed on the inner surface of the top pillar by at least one of the top pillars, and the pillars may be columnar bodies. M290425 can be considered as a partial ring body with a gap between the two adjacent top columns for the passage of the liquid. As shown in Fig. 2, Fig. 7A, Fig. 7B, Fig. 7C, Fig. 7D, the putter is The push rod is similar to the handle 24 of the rear micro injection, and the front end is equipped with a piston joint (four) as a cross rib structure. In order to cooperate with the push rod support 6, four ends are provided at the end of the connecting rod 2 =: Pushing the boss 22. The pusher 2_ is provided with a pair of shoes 21, and the clothing U corresponds to the (four) lock ring 44. At least one of the claws 28 is formed on the end of the connecting rod 25 near the top ring a, the rib structure In this reality In the example, there are two cards with the putter ^ ί ^, the needle is added to the tree. She forms the opening direction of the two opposite cross ribs on the connecting / facing the top ring 2 ι - v angle of the opening angle = v 286, σ 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 The intersection of the inner corner 282 and the side away from the cross rib forms an outer corner 283 Γ ^ (10) thin 21 — _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The outer end 285 is at the distance from the outermost end of the cross rib to the intersection of the cross ribs. When the claw body tears 4 and the horn of the corner 283, the outer corner edge (10) _ side of the claw 28 is parallel and does not touch. , claw (four) heart: the distance of the intersection line is equal to the distance from the outermost end of the connecting rod 25 to the intersection of the cross ribs. In the size and position of the opening of the rod, as long as the strength of the push rod 2 for the normal operation of the syringe can be ensured, the mouth (four) 3 of the um (four) 6 aki, the tender shot 12 8 M290425 is completed, the pusher 2 is broken outside the syringe 1. = Figure 2, Figure 6, Figure 7A, Figure 8 eight, Figure 8B As shown in Fig. 100, in order to prevent the pusher 2 of the bead 21 from pulling outward and pushing the seal lock ring 44 forward, a push rod support 6 having a limit function is provided at the rear end of the syringe 1. The seat 6 is a cylinder having a through hole 中间 in the middle, and the diameter of the through hole 61 is slightly larger than the diameter of the push rod 2, so that the push rod 2 can be inserted into the through hole η and slide in the through hole. The push rod support 6 is set Inside the barrel, the outer wall surface 63 of the hollow cylinder is a conical surface, and the inner surface 12 of the enzymatic surface of the push rod holder 6 is also a conical surface that cooperates with the outer wall surface 63, and The small end diameter of the inner wall surface 12 is smaller than the large end diameter of the outer wall surface 63. Thereby, the pusher holder 6 can be clamped to the rear of the syringe, and the pusher can be pushed into the syringe 1. The outer wall surface (10) of the push rod holder 6 extends outward to form a ring-shaped large portion, and the %-shaped protrusion 67 cooperates with the inner wall surface 13 of the barrel i, so that the push rod holder 6 cannot be moved to the outside of the barrel after assembly, after assembly The push rod holder 6 is fixed to the opening of the syringe] and cannot be moved. In the hollow cylindrical portion of the push rod holder 6 disposed outside the barrel 1, there are fewer h-stop grooves 62, at least one mounting groove 65 and at least one θ _, which are 180 degrees symmetric. The thrust groove 62, the two symmetrical mounting grooves 65 and the four spaced apart intervals are disposed in the thrust groove 62 and are assembled in the hollow cup portion of the push rod holder 6 uniformly distributed in the push cup/\ groove. Wall =. At the corresponding position on the rear end of the push rod 2, the y-shaped surface is provided with _ and the thrust groove, and the shirt (four) 22° is used. When the medical staff pulls the push rod 2 forward, the push rod 2 is stopped. The pushing boss 22 faces the thrust groove 62 of the push cup holder 6 and pushes the push rod 2 forward. The thrust boss 22 will be blocked by the thrust groove 13 M290425 62 and cannot continue to advance. It is guaranteed that the slanting surface of the slanting _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The cylindrical step 422 of the rear end portion of the needle sleeve 42 can be sealed and assembled in the axial direction of the push rod holder 6 in order to facilitate the application of two (10) light-slots 697. In this tight fit, the rear end of the syringe is exposed. Load 7, push rod 2砸21 mast support claw 28 corresponds to the fitting groove 65, the claw 28 is subjected to the (four) force, 1 when = 8 and assembly = 'when the claw 284 _ 285 _ rib = When the distance to the intersection of the cross ribs is reached, the claw 2 of the claw 25 is taken by the external push rod to purchase the stalk 2 ===^6 - the thrust groove 62 is matched to prevent the push rod'. The thrust boss 22 slides forward. When the shirt (4), only the 劲 劲 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ On the inner wall, when the injection is completed, pull the syringe back with the push rod! Inside, the push rod 2 follows the 'needle sleeve 42 (with the needle tube being cut by the inner push rod 2, _ moving backward, the claw 28 is in contact with the inner side of the push rod support (4) ^ M290425 64, squeezed, the claw end 285 to the inward movement of the intersection of the cross ribs. When the outermost measurement is taken, the distance from the outermost end of the claw to the cross rib is reversed, so that the push rod 2 cannot be stunned. At this time, the piston 3 With the push rod support 6 push rod 2 d ^ and the claw body 284 completely enters the lock groove 66, so that the inner wall of the (4) 2 gamma syringe 1 is moved backwards. When the push rod 2 is locked, it can be 1" The top (four) is provided with a notch 211, which makes the top product 2 = the same shape, and is outside the 91 ^ 21. The liquid medicine of the cockroach can enter the inside of the _21 from the notch 211 and the needle (4) is avoided. Remaining. As shown in the figure m and the surface, in the first embodiment of the present invention, the top (four) may also have the following shape 'a cylindrical body 23a is formed at the front end of the push rod 2, and the cylindrical surface is less - A type of her (four), correcting, the top ring 21 or the top column of the first embodiment is placed on the outer portion of the cylinder Ma. Accordingly, the cylindrical step 422 at the rear end portion of the needle sleeve 42 is opened. With and with a cylinder The tearing corresponding groove 429a' groove has the same height as the depth of the main body. The concave groove of her groove is tightly fitted, and in order to reduce the residue of the liquid, the height of the _ is less than the height of the cylinder. As long as it can ensure that when the cylinder is fully inserted into the groove Wei, the Qing 21 can push the sealing lock ring 44 disposed on the cylindrical step 422 at the rear end portion of the needle sleeve 42 away from the table 422.鼾a 士. When Shi Tian shot 70%, the cylinder 23a is completely inserted into the groove 8 4298, at this time, the protrusion 212 on the cylinder is connected to the inner wall surface of the groove 429a M290425. The friction between the needle sleeve 42 and the needle tube 43 can be compared with the push rod 2. 2 in the private material 1 , the self-destruction safety work described in the actual--------------- - A kind of (4) self-return behavior. Because the fine back of the needle tube of this creation is carried out after the needle tip 431 is pulled out by the body of the donor, it does not bring the suffering to the patient. The syringe disclosed in /087669 can cause painful defects to the patient when the needle is bounced back; and it also overcomes the existing The problem of a large amount of liquid residue is caused by the inconsistency of the structure during the operation. The above description is only a specific description of the present embodiment, and is not intended to limit the scope of the patent of the creation, and all other technical features of the creation are made. Equivalent transformations are included in the scope of this creation. M290425
111.. ....前端内壁面 15.... ..後端內壁面 2•…· .推杆 21.... ..頂環 22..., ...止推凸台 23.... ..如端端面 24··· ...手柄 25.... ..連接杆 28··· ...卡爪 29.... • •豁口 211·· …·缺口 212··, ....凸起 281·· ....圓形孔 282·· ....内角邊 283·. ....外角邊 284·· ....爪體 285·· ....爪體最外端 286·· ····豁口 3…·· •推杆活塞 32…· ••活塞後端面 4…·· •針頭部份 41…· ••針管座 42… …針管套 43···· ••針管 44… 46…. ••卡擋 411.1 …··空腔 413" …·外螺文 415· •…·圓柱體 416·· …·外圓柱面 421· ••…通孔 422·· …·圓柱形台階 423· .....箣端面 424" …·圓柱形通孔 425· ••…圓錐形通孔 426" …·球形通孔 427· .....底面 428" 429· ••…圓柱形通孔 431" …·針管尖 441· .....凹槽 6···· ••推杆支座 61··· …通孔 18 M290425 62···· ••止推槽 63…·. •外圓錐壁面 64…· ••内環面 65…·· >•裝配槽 66···· ••鎖槽 67…·· ••推杆支座後端面 69…· ••槽 23a·· …·圓柱體 429a· ••…凹槽 19111.. .... front inner wall surface 15...... rear end inner wall surface 2•...·. push rod 21...... top ring 22..., ... thrust boss 23 .... .. such as end face 24··· ...handle 25...... Connecting rod 28··· ...chuck 29.... • • Notch 211····notch 212 ··, .... Bump 281··....round hole 282··.. inner corner 283·.... outer corner 284··....claw 285·· . ...the outermost end of the claw body 286······口口3...···Push rod piston 32...·••Piston rear end face 4...··Needle part 41...·••Needle seat 42... Needle sleeve 43···· ••Needle 44...46....••Snap 411.1 ...··Cavity 413" .... External snail 415· •·Cylinder 416····Outer cylindrical surface 421· • •...through hole 422····cylindrical step 423·....箣 end face 424" ... cylindrical hole 425· ••...conical through hole 426" ...·spherical through hole 427· ... .. bottom surface 428" 429· ••... cylindrical through hole 431" ...·needle tip 441·..... groove 6····••Push rod holder 61····through hole 18 M290425 6 2···· •• thrust groove 63...·. • outer conical wall surface 64...·•• inner ring surface 65...·· >•mounting groove 66···· ••Lock groove 67...·· •• Pusher support rear end face 69...·••Slot 23a····Cylinder 429a·••... Groove 19