M269075 八、新型說明： 【新型所屬之技術領域】 本創作涉及醫療器械的技術領域，具體地說是一種帶有針頭座回拉結構的安八 注射器。 【先前技術】 全球各地有很多醫護人員及醫療廢棄物處理人員，因注射器的處理不當，導致 經常被注射器針頭刺傷，進而感染如：AIDS、乙肝、肺結核（TB)、艾滋病等血 液性感染的赫。據統計全世界每年邮安全注射導致死亡的蘭數高達⑽ 萬例，直接醫療費用更是高達幾億美元。 不安全注射是指雜纽射者、醫護和公共魏移全敝射方式，亦即， 重復使用—次性注射器、錢操作缺失、共用針頭和廢棄物處理不當等。爲了 避免上述事件的發生，現在市場上出現了各種類型的安全注射器。M269075 8. Description of the new type: [Technical field to which the new type belongs] The present invention relates to the technical field of medical equipment, specifically an Anba syringe with a needle seat pull-back structure. [Previous technology] There are many medical staff and medical waste handlers all over the world. Due to improper handling of syringes, they are often stabbed by syringe needles and infected with blood infections such as AIDS, hepatitis B, tuberculosis (TB), and AIDS. . According to statistics, the number of deaths caused by postal security injections in the world each year is as high as 20,000, and direct medical expenses are as high as several hundred million dollars. Unsafe injection refers to the method of total injection by miscellaneous shooters, medical care, and public Wei Yi, that is, reuse-disposable syringes, lack of money handling, shared needles and improper disposal of waste, etc. In order to avoid the above events, various types of safety syringes are now on the market.
述幾種： 習知安全注射器案例一：Here are some examples: Known safety syringe case 1:
在臨床注射藥液時將金屬鈎擠 、筒内’以達到安全目的。這種設計的優點是·· 入針頭座内的過程中阻力較小，使用者在施加推 M269075 力時手不會抖動，故不會增加患者的疼痛；而缺點是：卜此金屬釣在與塑· 杆的枯σ技#上’目别尚無法保證兩者她合後其分離力制大於5叫頓故 單純的金屬釣結構在使用中失誤率高，在安全功能上穩定性差，在加工生產中 有-定比例的瑕疵品産生’從而導致此類安全注射器在使财無法體現安全， 2、當金屬罐入針頭座内時兩者之間無法牢牢卡死，如果旋轉雜，可將金屬 鈎與針頭座再次分離，故此類安全注射器無法達顧制損毀，存在重復使用的 可能性。 習知安全注射器案例二·· 在其芯杆的前端設有-呈箭頭形的錐狀塑膠結構，在注射藥液的過程中此錐狀 結構擠入塑膝針頭座中與針頭座結合，注射藥液完成後，拉動芯杆，針頭座即 被帶入針肋，以達全目的。此種設計的優點是：芯杆㈣端的箭頭形錐 狀物與芯杆是-_瓣件’崎頭座也是歸件，因此生紅餘簡單，缺 點是：卜在臨床注射藥液時將該錐狀結構擠入針頭座内的過程中，使用者需施 加大於注射藥液時的兩倍以上推力才能將兩者完成結合，而此時注射器的針頭 尚在人體内，由於使用者在施加特殊推力時手會抖動，容易增加患者的疼痛… 當錐狀結構擠入針頭座内時兩者之間無法牢牢卡死，如果在兩者之間使加奶 牛賴以上的分離力，可將雜結構與針驗再次分離，且兩者均爲歸完整體， 故此類安全注射器無法達到強制損毀，也存在重復使用的可能性。 習知安全注射器案例三·· 在其芯杆的前端設有-呈斜柱形的錐狀塑膠結構，在注射藥液的過程中此錐狀 結構進入塑膠針頭座中。完成藥液注射後，使用者需先轉動芯杆，讓芯杆前端 的錐狀體卡住針頭座後’再拉動怒杆，此時針頭座才被帶入針筒内，達到安全 M269075 功此。此種設計的優點是：丨、臨床注雜液時，#呈斜柱形的錐狀體進入塑膠 針頭座内的過程中不用增加特殊推力，者在操作時手不會抖動，故不會增 加患者的« ; 2、芯杆哺端斜_的錐㈣與雜是—體_料，而針頭 座也是塑膠件，因此生紅藝也較解。缺闕是：丨、在臨床使用中，使用者 在完成此注射H的安全功科，需先_芯杆，讓芯杆前端鱗㈣卡住針頭 座後，再拉動芯杆，針職才被帶人針制，才能_安全功能，如果完成此 _需_雙销時操作才能完成，而在實際使财陳錯況下，醫務人員 疋無法冋鳴出雙手來完成此安全舰的操作過程的；2、當錐狀體完全進入塑 膠針頭座㈣兩者之間沒有產生咬合，賴者需再轉動芯杆，讓芯杆前端的錐 狀體卡住制座後’雜動雜，針頭座才被帶人針筒内，達到安全功能。如 果使用者在使賴;^轉動芯杆，那麼可將錐狀體從針頭座再次拉出，且兩者均 爲塑膠完整體，嶋祕咖雜侧刪，蝴峨用的可能 性0 習知安全注射器案例四： 其針頭座制《可換針頭式結構，即針馳是套接在—錄體連接件上的， 針頭座的前端是針頭’此柱體連接件是設置在脑_。在制中可根據使用 者的實際需要更換不同麵崎頭，設置销_雜體連接刺下端設有一 呈箭頭形的倒錐狀塑膠結構件，柱體連接件與筒頸之間環狀密封圈來伴證 兩者之間的贿性及縣力，套接絲树活塞具有—個触體連接件的 下端倒錐狀瓣結構件桃_箭獅倒錐狀内孔，在注射藥液的過程中此倒 錐狀結構件㈣人活塞⑽箭__狀孔内，靖驗絲後，拉動芯杆， 筒頸内的柱體連接件和針頭座即被帶人針制，以朗安全目的。此設計的優 M269075 點是小臨床注射藥液時，當呈箭獅的倒錐狀塑膠結構件擠入活塞内的箭頭 形倒錐狀孔⑽過程中不用增加錄的特殊推力，使財麵 動，故不會增加患者的疼痛；2、柱體連接件和下雜狀結献—體的瓣件， 而活塞也只改變了-些形狀㈣，因此生紅藝也較簡單。缺點是小在臨床 者在對患者進行卿顺，由於受患教躲_粗紐及厚雜和患者因 藥物注射而造成肌«攣所產生的與針頭之間的摩擦阻力最高可達到2〇牛 頓，所以在臨紅，使財職者進行_注射雜往會有針顧承受不了由 於患者皮膚表_粗難及厚薄性和患者因藥物注射崎成肌崎攣所產生大 中，祕嫩梅_微_彻_彳觸者之間的脖 力，故此兩細帽力—__ 15伟，崎之崎擦力超過 15牛頓’膽活塞⑽箭彡娜狀抓將g咬住在其__連接件下端 的倒錐狀娜曝，#，物ut峨㈣魏，而使用 約15牛頓的摩擦阻力而造成針頭回縮現象的發生，從而無法對患者進行正常注 射，此缺點纽品較命傷，故此臟品賴早已進人料，但不能得到 推廣的原S之所在’· 2、狀結猶私活塞_箭讎狀制時兩者 之間無法牢牢卡死’如果在兩者之間施加超過15牛頓以上的分離力，那麼可將 此兩者刀離，〃離後兩者均爲完整體，故此類安全注射難法制強制損毁， 也存在重復使用的可能性。 習知安全注射器案例五： 由筒體筒體内的心杆、芯杆頭部的密封圈與筒體相組合的針頭座等組成。其 请體月^有相針碩的針頭座安裝在筒體的筒頸内，在針頭座的外壁安有彈 菁而心杆疋空心官’在芯杆的頂端安裝底塞，怎杆底塞與針頭座的尾部相配 M269075 合。當注雜敝射完畢後，芯杆底塞和朗絲彈箐力的作訂自動縮進芯 杆内’以達到安全目的。此設計結構也存在—㈣的優點和缺點，優點是·臨 床注射練完畢後’其針·挪簧力的個下自觸龄_，完成安全動 作。缺點是：卜結構複雜’元件較知且元件的精密度要求高，在加工生產中 有較多的贼品產生，故AA提高了生産成本；2、t驗靖完畢後，芯杆底 塞和針頭座在彈簧力的作訂自動縮進芯杆内，雖達到了安全目的，但所有的 元件均爲完整體，故此類安纽_無飾则概，也存在重復使用的可 能性。 【新型内容】 二創作的目的在於提供-種卡簧式安全注射器，它結構簡單合理，製造工藝簡 單 W驟V此有效控制成本，且產品在使用中安全功能的穩定性極高、 藥液殘留量低，克服了現有這類安全_在結構設計技術上的Μ，且能真 真達到強制損毀，杜絕重復使用的可能性。 爲了實現上述目的，本創作的技術方妓_種卡簧式安全注射器，它主要包括 針筒，設置在·，套接在芯杆前端的活塞，與針筒相配合的針頭座、 針頭’其特縣&:驟綱觀#目_·，_細^近頂端處橫 向設有槽，槽内設有回拉連接件。 傳▲主射為的β又相念，採用新型回拉連接結構，用結構簡單的金 屬線狀體或金屬繼_本_的安全舰，本_有麟低生産工 β難度’減少工藝步驟，縮短工序時間，提高生産效率及品質，有效控制生産 成本，所以本回拉結構設計合理、實用，本産品的優點你結構設計合理、 M269075 強制知毀、藥液殘留量低、製造工藝難度低、工序少、節約成本、 易於生產、易於推廣。 關於本創作之優點與精神可以触以下賴餅述及所關式制進—步的瞭 解0 【實施方式】 月多閱圖1 ®1爲本創作結構示意圖。如圖1所示，—般傳統的注射器包含有In the clinical injection of the drug solution, the metal hook is squeezed into the barrel to achieve the safety purpose. The advantage of this design is that the resistance is small during the process of entering the needle seat. The user will not shake his hand when he pushes M269075, so it will not increase the patient's pain. The disadvantage is that the metal fishing · Σ 枯 # on the plastic rod cannot be guaranteed. After the two are combined, the separation force is greater than 5. The simple metal fishing structure has a high error rate in use, has poor stability in safety functions, and is difficult to process. There is a certain proportion of defective products in production, which results in the safety of such safety syringes. 2. When the metal can is inserted into the needle holder, the two cannot be firmly stuck. If the rotation is mixed, the The metal hook is separated from the needle holder again, so this type of safety syringe cannot be damaged, and there is a possibility of repeated use. Known Safety Syringe Case 2 · The front end of the core rod is provided with an arrow-shaped cone-shaped plastic structure, which is squeezed into the plastic knee needle seat and combined with the needle seat during the injection of the medicinal solution. After the medicinal solution is completed, the core rod is pulled, and the needle seat is brought into the needle rib to achieve the full purpose. The advantage of this design is that the arrow-shaped cone at the end of the mandrel and the mandrel are -_ flaps. The scapular head is also a piece, so it is simple to make red, but the disadvantage is that when the clinical solution is injected, When the cone-shaped structure is squeezed into the needle holder, the user needs to apply more than twice the thrust when injecting the drug solution to complete the combination of the two. At this time, the needle of the syringe is still in the human body. The hand will shake when pushing, which will easily increase the patient's pain ... When the cone-shaped structure is squeezed into the needle seat, the two cannot be stuck firmly. If the separation force between the two is increased, the miscellaneous The structure is separated from the needle test again, and both are intact. Therefore, this type of safety syringe cannot be forcibly destroyed, and there is also the possibility of repeated use. Known Safety Syringe Case 3 · The front end of the core rod is provided with a tapered plastic structure with an oblique cylindrical shape. This tapered structure enters the plastic needle seat during the injection of the medicinal solution. After the injection of the medicinal solution is completed, the user needs to turn the core rod first, so that the cone at the front end of the core rod catches the needle holder, and then pull the angry rod. At this time, the needle holder is brought into the syringe to achieve safety M269075. . The advantages of this design are: 丨 During clinical injection of miscellaneous fluids, the cone-shaped body with # oblique cylindrical shape does not need to increase the special thrust during the process of entering the plastic needle seat, and the hand will not shake during operation, so it will not increase. The patient's «; 2. The cone and miscellaneous material of the core rod oblique end are the body material, and the needle seat is also a plastic part, so the red art is also more understandable. The shortcomings are: 丨 In clinical use, the user needs to _ the core rod to complete the safety function of the injection of H. First, let the front end of the core rod lock the needle seat, and then pull the core rod. Only with a needle can the safety function be completed. If this is done, the operation can only be completed when the double pin is required. However, in the case of actual mistakes, medical staff ca n’t scream out both hands to complete the operation of this safety ship. 2. When the cone completely enters the plastic needle seat, there is no occlusion between the two. The person needs to turn the core rod again to allow the cone at the front of the core rod to catch the seat. It was brought into the syringe to achieve the safety function. If the user is using Lai; ^ turn the mandrel, then the cone can be pulled out from the needle base again, and both are plastic intact, the side of the secret coffee is deleted, the possibility of butterfly use 0 Case 4 of Safety Syringe: Its needle seat is made of interchangeable needle structure, that is, the needle is sleeved on the body connector, and the front end of the needle seat is the needle. This cylinder connector is set in the brain. In the manufacturing process, different heads of different faces can be replaced according to the actual needs of the user. The lower end of the set pin_miscellaneous thorn is provided with an inverted cone-shaped plastic structural member with an arrow shape, and a ring-shaped sealing ring between the cylindrical connector and the barrel neck. To prove the bribery and prestige between the two, the socketed wire tree piston has a lower cone-shaped valve structure of the lower end of a contact body connector. This inverted cone-shaped structure is inserted into the piston-shaped arrow hole. After the wire is inspected, the core rod is pulled, and the cylindrical connector and the needle seat in the barrel neck are needled for safety purposes. The excellent M269075 point of this design is the small clinical injection of medicinal solution. When the inverted cone-shaped plastic structural part of the arrow lion is squeezed into the arrow-shaped inverted cone-shaped hole in the piston, the special thrust of the record does not need to be added to make the property move. Therefore, it does not increase the patient's pain; 2. The cylindrical connector and the lower heterozygous donation-body valve, and the piston has only changed some shapes, so it is simpler to make red art. The shortcoming is that the clinical patients are carrying out a smooth treatment on the patients. Due to the patient's education, the friction between the muscle and the needle caused by the patient's muscles caused by drug injection can reach a maximum of 20 Newtons. Therefore, in the red, so that the financial staff _ injection miscellaneous will have a needle Gu can not bear due to the patient's skin surface _ rough and thick and thin and the patient due to drug injection saki myogenic sclerosis produced by large, medium, and tender plum _ micro _Through_ the neck force between the contact person, so the two fine cap forces —__ 15 Wei, Saki nozaki rubbing force is more than 15 Newton's bile piston ⑽ arrow 彡 抓 shape grasps the g at the bottom of its __ connector Inverted cone-shaped Na exposure, #, 物 ut Emeiwei, and the use of about 15 Newtons of friction resistance caused the needle to retract, which makes it impossible for patients to be injected normally. This disadvantage is more fatal than injury, so it is dirty. Pin Lai has long been expected, but cannot be promoted where the original S is. '2, the shape is still a private piston _ the arrow can not be firmly stuck between the two, if you apply more than 15 between the two Separation force above Newton, then the two can be separated, and the two are complete after separation , It is such a difficult legal safe injection forcibly destroyed, there is also the possibility of reuse. Case 5 of a conventional safety syringe: It consists of a mandrel inside the barrel, a needle seat combined with the sealing ring on the head of the core rod and the barrel. The body of the body is equipped with a needle holder with a phase needle installed in the neck of the barrel, an elastic wall is installed on the outer wall of the needle holder, and the core rod is hollow. The bottom plug is installed on the top of the core rod. M269075 fits the tail of the needle holder. When the injection is completed, the mandrel bottom plug and Lance's elastic force are automatically retracted into the mandrel 'for safety purposes. This design structure also has the advantages and disadvantages of ㈣, the advantage is that after the clinical injection training is completed, its needle and spring force are lower than the contact age, and the safety operation is completed. The disadvantages are: the structure is complex, the components are well-known and the precision of the components is high, and there are more thieves in processing and production, so AA increases the production cost; 2. After the inspection is completed, the core plug and the The needle seat is automatically retracted into the core rod by the spring force of the binding. Although the safety purpose is achieved, all the components are complete. Therefore, there is also the possibility of repeated use of this kind of safety. [New content] The purpose of the second creation is to provide a kind of spring-type safety syringe, which has a simple and reasonable structure and a simple manufacturing process. This effectively controls costs, and the product has extremely high safety function stability during use, and drug residues. The amount is low, which overcomes the existing safety _ in structural design technology, and can achieve compulsory damage, and eliminate the possibility of repeated use. In order to achieve the above purpose, the technical party of this creation is a kind of spring-loaded safety syringe, which mainly includes a syringe, a piston set on the front end of a core rod, a needle seat matched with the syringe, and a needle. Special county &: 骤 纲 观 # 目 _ ·, _ ^^ There is a groove near the top, and a pull-back connection is provided in the groove. It is said that β, which is the main shot, uses the new pull-back connection structure, and uses a simple metal wire or metal to follow the _Ben_ safety ship. Shorten the process time, improve production efficiency and quality, and effectively control production costs, so the pullback structure design is reasonable and practical. The advantages of this product are reasonable structure design, M269075 mandatory knowledge destruction, low liquid residue, low manufacturing process difficulty, Fewer procedures, cost saving, easy production and easy promotion. Regarding the advantages and spirit of this creation, you can touch on the following steps to understand the relevant system-step understanding. As shown in Figure 1, a conventional syringe contains
、十筒1 DX置在針筒1内部的芯杆2、套接在芯杆2前端的活塞7以及設置於針 筒1頂端的針頭座3和針頭4。 略而。本創侧是在上述既有元狀上額外增加—些元件，以及特殊的結 構没计’而達成摘作目的。本猶所額外增加的元件至少有在芯杆2前端巧 設置的回拉連接柱5以及赌連接件6。為了讓回拉連接件6可闕利將位別 筒1頂端的針頭座3和針頭4回拉至針筒i内部，在本創作的結構設計中，對 頭座3是可以與針筒i分離的。底下，將更進一步地轉回拉連接件6如何與The ten cylinder 1 DX is a core rod placed inside the syringe 1 2. The piston 7 sleeved on the front end of the core rod 2 and the needle holder 3 and the needle 4 provided on the top of the syringe 1. For a while. The original side is to add additional components to the existing elements mentioned above, as well as special structures, to achieve the purpose of abstraction. The additional components added at least include a pull-back connection post 5 and a gambling connection 6 provided at the front end of the core rod 2 at least. In order to allow the pull-back connector 6 to easily pull the needle seat 3 and the needle 4 on the top of the cylinder 1 back into the syringe i, in the structural design of this creation, the counter seat 3 can be separated from the syringe i . Underneath, it will be further turned back to
針頭座3緊瓣，蝴合之_ _胁5、咖雖針聊和針 頭4。 請參閱圖2和圖3，圖2爲本創作雜連接柱結構示_，_ 3爲本創作回拉 連接柱側娜齡蝴。如，糊3卿，⑽線狀體或 金屬片狀體的回拉連接件6乃是設置於，靠近回拉連接柱5頂端處橫向設有槽8 内’且槽8的下_織體處設有相對稱的斜坡面9。 且斜坡面9的寬度小 6〇度之間的夾角。因 由於’回拉連接柱5賴面餘小於針職3内腔直徑， 於回拉連接柱5的直徑，兩斜坡面3之間成角度在5度到 M269075 UT ’可使喊連接件6受力而變形，亦即，當使用者對 施力往前推時，除了可將在的注射液注射入人體，當注射液快要 完全被注射完時:回拉連接柱5也因而被推入針頭座3，而使得回拉連編被 —内腔土又力㈣。在未推入針頭座3内腔時，為金屬線狀體的回拉連 接件6的形財爲—挪、㈣彡、辦形，繼綠斜，雜連接件 6的形狀L u字形、倒u字形’爛綱騎端均有刺尖，在且 體實施時前部針頭可設計成可換式和不可換式兩種。 ’、 月/關4 « 4爲本創作第—實施例結構示意圖。如圖4中所示之本創作第一 實施例中，-隻如的注射器的針頭座3採用内後式，即針頭座3是設置在針 筒1上部筒頸内的’針頭座3與筒頸之間設計有密封結構，防止漏液發生，針 頭座3不可換。只疋，此種結構爲現有技術不在本創作要求保護範圍之内，因 此不作進一步描述。 圖4中的本創作_拉連接件6爲_字形的金屬線狀體，且如圖2所示之兩斜 坡面9的夾角爲50度。所以，當向前推動芯杆2時在活塞7的作用下，注射 液經針頭4流出。由於回拉連接柱5的截面直徑小於針頭座3内腔直徑，所以， 當芯杆2推到-定深度後，回拉連接柱5的前端會進人針頭座3内腔。此時， 若再向前推動芯杆2，會因為回拉連接件6的寬度大於針頭座3的内腔，而在觸 及針頭座3後會受到針頭座3下外延的作用力，所以，在這股力的作用下，一 字形金屬線狀體會向下彎曲變形，如圖5中所示成倒u形進人針頭座3内腔。 當怒杆2無法繼續向前推動時，亦即注射完成後，則向後拉動芯杆^時，由於 回拉連接件6爲金屬材質，又受到麼迫力而變形成倒⑽，自然情況下會對針 頭座3内壁産生向外的張力，這時向下鴻胁2，芯杆2會帶動上端_拉連 M269075 接柱5，使得變形後-字形金屬線狀體的左右兩做端縣紮人針頭座3内壁 牢牢卡死麵職3内完全無法分離。 請參閱圖6 ’圖6爲本創作第—實施例回拉芯杆時結構示意圖。如圖6中所示， 當向後拉_ _時，針頭座3、針頭4也將被向後拉動，最終進入針筒2 内部，如此即達到強制損毀的目的，杜絕了再次使用的可能性，更可有效防止 醫務人員被針職傷而導致感染，達到安全注射的目的。 ❼閱圖7，ffl 7爲本創作第二實施例結構示意圖。在本創作第二實施例中，如 θ中斤丁 x5ml的注射益，若其兩斜坡面9的夾角爲4〇度，且拉連接件 6也預先如第7圖所示向下騎。如同第—實施例，同樣地前推·杆〗，直到 倒U字糊目峨#6目條__彳㈠卩崎織，若向後 拉動芯杆2時，會使得變形後倒u字形金屬線狀體的兩個尖端縣紮人針頭座3 内壁’同樣地也會在將針頭座3、針頭4最終拉入針筒2内 的。 ’達到安全注射的目 請參_，_本創作第三實施鑛構_。在摘作第三實施例中，如 圖8中所不’-隻3ml的注射器’若其兩斜坡面9的夾角爲烈度，且拉連接件 6也預先如第7圖所示向上彎折。如同第—實施例，同樣地前推動芯杆2，直到 倒ϋ字形金屬回拉連接件6因受到向内擠壓而變形後，即注射完紐，若向後 拉動芯杆2時，會使得變形後倒υ字形金屬線狀體的兩個尖端深深紮人針頭座3 内壁’同樣地也會在將針頭座3、針頭4最終拉人針筒2内，達到安全注射的目 的。 藉由以上擁具體實蘭之詳述，—望能更加清楚麵本創作之特徵與精 神，而並相上述_露雜佳賭實施對本_之料純_。相反 12 M269075 地，其目的是希望能涵蓋各種改變及具相等性的安排於本創作所欲申請之專利 範圍的範疇内。 【圖式簡單說明】 圖1爲本創作結構示意圖 圖2爲本創作回拉連接柱結構示意圖 圖3爲本創作回拉連接柱側視圖 φ 圖4爲本創作第一實施例結構示意圖 圖5爲本創作第一實施例注射完成時結構示意圖 圖6爲本創作第一實施例回拉芯杆時結構示意圖 圖7爲本創作第二實施例結構示意圖 圖8爲本創作第三實施例結構示意圖 【主要元件符號說明】 1針筒 2芯杆 3針頭座 4針頭 13 M269075 5回拉連接柱 6回拉連接件 7活塞 8槽 9斜坡面Needle seat 3 tight flaps, butterfly combination _ _ threat 5, coffee though needle chat and needle 4. Please refer to Fig. 2 and Fig. 3. Fig. 2 shows the structure of the hybrid connecting column of the creation. For example, the pull-back connection member 6 of the paste 3, the stellate body or the metal sheet body is provided near the top end of the pull-back connection column 5 and a groove 8 is provided inside the groove 8 ′, and the lower 8 of the groove 8 There is a symmetric ramp surface 9. And the width of the slope surface 9 is smaller than the included angle between 60 degrees. Because the diameter of the pull-back connection post 5 is less than the diameter of the inner cavity of the needle post 3, the angle between the two slope surfaces 3 is 5 degrees to M269075 UT 'the diameter of the pull-back connection post 5 can make the shout connection 6 accept The force deforms, that is, when the user pushes forward the force, in addition to injecting the injection solution into the human body, when the injection solution is about to be completely injected: the pull-back connection column 5 is also pushed into the needle. Seat 3, which makes the pull back quilt-the inner cavity soil is strong again. When the inner cavity of the needle seat 3 is not pushed in, the shape of the pull-back connector 6 which is a metal wire body is-move, ㈣ 彡, handle, follow the green oblique, and the shape of the hybrid connector 6 is L u-shaped, inverted. The U-shaped 'rotten' riding end has barbed tips, and the front needle can be designed to be replaceable and non-replaceable when the body is implemented. ′, Month / off 4 «4 is a schematic diagram of the structure of the first embodiment of the creation. In the first embodiment of the present invention, as shown in FIG. 4, the needle base 3 of the only syringe adopts the inner back type, that is, the needle base 3 is a 'needle base 3 and a cylinder provided in the upper neck of the syringe 1. A seal structure is designed between the necks to prevent leakage, and the needle seat 3 cannot be replaced. However, this kind of structure is out of the scope of protection of this creation because of the existing technology, so it will not be described further. The original _pull connecting member 6 in FIG. 4 is a _-shaped metal wire, and the included angle between the two inclined slope surfaces 9 shown in FIG. 2 is 50 degrees. Therefore, when the core rod 2 is pushed forward, the injection liquid flows out through the needle 4 under the action of the piston 7. Because the cross-sectional diameter of the pull-back connection post 5 is smaller than the diameter of the inner cavity of the needle base 3, after the core rod 2 is pushed to a predetermined depth, the front end of the pull-back connection post 5 enters the inner cavity of the needle base 3. At this time, if the core rod 2 is pushed forward again, the width of the pull-back connecting member 6 is larger than the inner cavity of the needle base 3, and after touching the needle base 3, it will be subjected to the external force of the needle base 3, so in Under the action of this force, the linear metal wire body will be deformed downward and deformed, as shown in FIG. 5, into the inner cavity of the needle base 3 in an inverted U shape. When the rage rod 2 cannot continue to be pushed forward, that is, after the injection is completed, the core rod is pulled backwards ^, because the pull-back connection member 6 is made of metal, and it is subjected to any force, it will become inverted. Naturally, it will The inner wall of the needle seat 3 generates outward tension. At this moment, the core rod 2 will drive the upper end_pulling M269075 post 5 so that the left and right sides of the deformed-shaped metal wire body are inserted into the needle seat. 3 The inner wall is stuck and the face is completely inseparable. Please refer to FIG. 6 ′ FIG. 6 is a schematic structural diagram of the first embodiment when the core rod is pulled back. As shown in Fig. 6, when pulling _ _ backward, the needle holder 3 and needle 4 will also be pulled backward and finally enter the inside of the syringe 2, so that the purpose of forced damage is achieved, the possibility of re-use is eliminated, and more It can effectively prevent medical staff from being infected by needle injuries and achieve the purpose of safe injection. Looking at FIG. 7, ffl 7 is a schematic structural diagram of the second embodiment of the creation. In the second embodiment of the present creation, if the injection benefit of θ 中 金 丁 × 5ml, if the included angle between the two slope surfaces 9 is 40 degrees, and the pulling connection member 6 rides down as shown in FIG. 7 in advance. As in the first embodiment, push forward the rod in the same way until the U-shaped paste is # 6 目 条 __ 彳 ㈠ 卩 崎 织, if you pull the core rod 2 backward, the U-shaped metal wire will be inverted after deformation Similarly, the two ends of the body are inserted into the inner wall of the needle base 3, and the needle base 3 and the needle 4 are finally drawn into the syringe 2 as well. ‘To achieve the goal of safe injection, please refer to _, _ the third implementation of this creative mining structure_. In the third embodiment, as shown in FIG. 8, a 3ml syringe is used, if the included angle between the two slope surfaces 9 is the intensity, and the pull connection member 6 is bent upwards as shown in FIG. 7 in advance. As in the first embodiment, the core rod 2 is pushed forward until the inverted metal-shaped metal pull-back connection member 6 is deformed by being pressed inward, that is, the injection is completed. If the core rod 2 is pulled backward, the core rod 2 will be deformed. The two tips of the back inverted U-shaped metal linear body are deeply pierced into the inner wall of the needle holder 3, and the needle holder 3 and the needle 4 are finally pulled into the syringe 2 to achieve the purpose of safe injection. With the detailed description of the specific real orchids above, I hope to be more clear about the characteristics and spirit of the creation of this book, and in accordance with the above-mentioned _Luzajia gambling implementation of this _ material pure_. On the contrary, the purpose of 12 M269075 is to hope to cover various changes and equivalent arrangements within the scope of the patents that this creation intends to apply for. [Schematic explanation] Figure 1 is a schematic diagram of the creative structure. Figure 2 is a schematic diagram of the pull-back connecting column of the creative figure. Figure 3 is a side view of the pull-back connecting column of the creative. Figure 4 is a structural schematic diagram of the first embodiment of the creative. Schematic diagram of the first embodiment of this creation when the injection is completed. Fig. 6 is the diagram of the first embodiment of the creation when the core rod is pulled back. Fig. 7 is the diagram of the second embodiment of the creation. Description of main component symbols] 1 syringe 2 core rod 3 needle holder 4 needle 13 M269075 5 pull back connection post 6 pull back connection 7 piston 8 slot 9 ramp surface