201242630 六、發明說明： 【發明所屬之技術領域】 本發明關於一次性注射器以及用於一次性注射器的 一種結構。 【先前技術】 為避免給人類或動物輸入或取出介質時發生交叉感 染，皮下注射n必須-次性使用，在使用後即作為垃圾處 理。目前使用最多的-次性注射器是由空腔筒體、針頭以 及裝配在筒體内的定程活塞組成。這種注射器所存在的最 大問題疋注射完畢之後，其針頭仍留在外面，不僅為注射 器垃圾的搬運、銷毀處理帶來不便，同時可能因不慎而扎 傷醫護人員’造成病菌的二次交叉感染，成為一個不能忽 視的醫療隱患，另外仍舊存在被二次使用的可能性，㈣ 出現了一種在使用後可將針頭拉回針筒的一次性注射 盗，這種-次性注射器還可被進一步設置為將拉回的針頭 通過設置在騎和㈣上的卡鎖結構卡鎖在針筒内，從而 使該-次性注射ϋ失效。除此料，還可以衫桿上設置 易中斷點’從而可在芯桿被回拉到位後，將芯桿折斷，確 保該一次性注射器無法再被使用。 上述的這種-次性注㈣為了實現將針頭拉回針筒 以及將芯桿卡鎖在針筒内的目的’ 一般需要在芯桿上設置 一個或多個具有特定的結構的部分’該結構需能在一個方 向上通過-個或多個關口，關σ的内徑稍小於該結構的最 201242630 大外徑，而在相反的方向上則不能通過該關口， 手段施加足夠大㈣力在該結構上，如在❹機械組裝機 對該一次性注射器進行裝配時。 〜例如，在申請號為201110066021.χ的中國發明申請 女全注射器及其自毀裝置，，中，在芯桿的桿頭上設置了如 圖1所不的錐形台結㈣，而在針座的内孔側面上相庫地 關口）12,肩狀部12的内徑稍小於錐形 口秦底面的練’當桿頭上推時錐形台結構u可产 助其錐面擠過肩狀部，而回拉時，錐形台 ^ =狀…合，對針座施加向下的拉力，從= =拉至針筒内。這種結構的缺陷在於在注射時，雜形台 擠過絲部12的過程需克職大的 =成很大不便，而且如控制不好極易使注射過程二: 疋甚至給被注射者造成不必要的疼痛。 .切 公開號為職π卿264的PCT專利申請公開了“針 次性安全注射器，，，如圖2所示，在雜上相向 2 Q Α置了分別為錐形和觸形的-對卡合凸緣21、 -肩=筒内側設置了與之相匹配的具有直角邊緣的卡 ^ ^ 23 °當_芯桿時，卡合肩狀部23被卡在卡合 結構二:間在:::芯ΓΓ針筒卡合在一起。上述 ㈣在裝配時，即便是借助機械組裝機的力 硬推二:22也無法直接通過卡合肩狀部， 次錐度式的裝配圈24進行辅助裝配，這樣增加了一道2 201242630 序也〜加了成本。此外，針筒前端的直徑需加大以給袭配 圈留出空間，而加大直徑的手柄前端也會造成已習慣使用 普通注射器的使用者的不適應。 因此，本領域的技術人員致力於開發一種特定的妗 構，這種結構即可以用於—次性注射器的針頭的回拉，: 可以用於S桿和針筒之間的卡鎖，而且能夠克服上述的缺 陷，以及應用了這種結構的一次性注射器。 、201242630 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a disposable syringe and a structure for a disposable syringe. [Prior Art] In order to avoid cross-infection when a human or animal is introduced or removed from the medium, subcutaneous injection n must be used once and used as a garbage after use. The most commonly used-secondary syringes are composed of a cavity barrel, a needle, and a fixed-range piston that fits within the barrel. The biggest problem with this type of syringe is that after the injection is completed, the needle remains outside, which not only causes inconvenience to the handling and destruction of the syringe garbage, but also may cause injury to the medical staff due to carelessness. Infection, it becomes a medical hazard that cannot be ignored, and there is still the possibility of being used twice. (4) There is a disposable injection thief that can pull the needle back into the syringe after use. This kind of secondary syringe can also be It is further arranged to lock the pulled back needle into the syringe through the latching structure provided on the ride and the (4), thereby invalidating the secondary injection. In addition to this material, an easy break point can be placed on the shirt so that the core rod can be broken after the core rod is pulled back into place, ensuring that the disposable syringe can no longer be used. The above-mentioned secondary injection (four) in order to achieve the purpose of pulling the needle back to the syringe and locking the core rod in the syringe generally requires the provision of one or more portions having a specific structure on the core rod. It is necessary to pass through one or more gates in one direction, the inner diameter of the off σ is slightly smaller than the largest outer diameter of the structure of 201242630, and in the opposite direction, the pass cannot be passed, by means of applying a sufficiently large (four) force at the Structurally, such as when assembling the disposable syringe with a mechanical assembly machine. ~ For example, in the Chinese invention application female full syringe and its self-destructing device, the application number is 201110066021. The cone head (4) as shown in Fig. 1 is provided on the head of the core rod, and the needle seat is provided. On the side of the inner hole, the inner diameter of the hole is 12), the inner diameter of the shoulder portion 12 is slightly smaller than that of the bottom surface of the tapered mouth. When the head is pushed up, the conical table structure u can help the cone surface to squeeze over the shoulder portion. When pulling back, the conical table ^ = shape, put a downward pulling force on the needle seat, and pull from = = into the syringe. The drawback of this structure is that during the injection, the process of squeezing the wire portion 12 through the wire portion 12 is greatly inconvenient, and if the control is not good, the injection process 2 can be easily made: even the injecting person is caused. Unnecessary pain. The PCT patent application, which is hereby incorporated by reference in its entirety, discloses the "needle-safe syringes, as shown in Fig. 2, which are tapered and tactile-shaped on the opposite side 2 Q The flange 21, the shoulder = the inner side of the cylinder is provided with a matching card having a right-angled edge. When the core rod is engaged, the engaging shoulder portion 23 is caught in the engaging structure 2: between: : The core ΓΓ syringes are stuck together. The above (4) during assembly, even if the force is pushed by the force of the mechanical assembly machine: 22, the shoulders cannot be directly engaged, and the secondary taper assembly ring 24 is used for auxiliary assembly. This adds a 2 201242630 order also adds cost. In addition, the diameter of the front end of the syringe needs to be increased to leave room for the ring, and the front end of the larger diameter handle will also cause users who are used to ordinary syringes. Therefore, those skilled in the art are working on the development of a specific structure which can be used for the pullback of the needle of the secondary syringe: a card that can be used between the S rod and the syringe Lock, and can overcome the above drawbacks, and the application of this structure Times syringe.,
7J Π 分 J 有鑒於現有技術的上述缺陷，本發 ::是提供-種用於-次性注射器的結構和應= :二=射：使得針頭的回拉和芯桿的卡鎖更為 疋砭種一次性注射器的裝配更為簡便。 為實現上述目的，本發明在第一態 :次性注射器的結構，結構包括依次相連的偏二種:於 #和阻槽部，偏轉部可朝向阻擔部或背 心連接 轉部的直徑大於阻播部的直徑，連接部 ^偏轉’偏 和阻擒部的直徑，且連接部的長度，亦即偏偏轉部 :錐形面’卿㈣離阻撞部的方= 在本發明的較佳實施方式中 片式。 轉部為整片式或者分 201242630 邊形。纟㈣另—較佳實施方式中，偏轉部為圓形或多 在本發明的另-較佳實施方式中， 型 結構為整體注塑成 本發明還提供τ 桿，其中在芯桿上、=次性注射器，包括針筒和芯 結構，在上的結構;ΠΓί發明在第一態樣提供的 且第一妹播Μ 在下的結構為第二結構， 部和下肩狀部:筒内側設置有上肩狀 ": 7 ^^; ^^ 艟仏’第—偏轉部的外徑大於上肩狀部的内卜第二偏 ==外徑大於下心料内徑；第— ㈣ 隔 =，大於或等於上肩狀部和下肩狀部之第： π 、4後吨騎時帛二結構被設置為可向下通 過上肩狀部，作 ~Jn卜通 被MM ml 通過下絲部，㈣—結構則 置為不可向下通過上肩狀部。 機器較'在對—次性注射器進行 變形而向上擠過下二結構被設置為可使針筒彈性 在本發明的較佳實施方式中， 轉部為整片式或者分片式。帛偏轉彻或第二偏 在本發明的較佳實施方式令，第一 轉部為圓形或多邊形。 或第一偏 在本發明的較佳實施方式中，芯桿為整體注塑成型。 201242630 曰本發明還提供了—種—次性注射器，包括針筒和芯 才干八中在心杯上間隔地設置有台狀部和如本發明在第一 態樣的結構，且台狀部在上，該結構在下，且該結構的偏 轉部和台狀部的下端面相互面對；針筒内側則設置有上肩 狀部和下肩狀部；台狀部的外徑大於上肩狀部的内徑，且 台㈣的上端面的周緣被設置成斜面；該結構的阻擒部的 下化面的外；ί:小於或等於上肩狀部和下肩狀部的内徑，該 結構的偏轉部的外徑大於下肩狀部的外徑；該結構被設置 可向下通過上肩狀部，但不可再向上通過下肩狀部。 在本發明的較佳實施方式中，該結構被設置為在對一 次性注射器進行機器裝配時，該結構可使針筒彈性變形而 向上擠過下肩狀部。 、在本發明_佳實施方式中.，該結構的偏轉部為整片 式或者分片式。 ^本發明的較佳㈣料巾，該結構⑽轉部為圓形 或多邊形。 在本發_較佳實施方式中，芯桿為整體注塑成型。 本發明還提供了-種一次性注射器，包括針座、針筒 =，其中還包括帶有中心通孔的切件，支禮件連接 在針涛的内壁上，針座被保持在針筒和支擇件之間 的=孔中設置有肩狀部，·芯桿的桿頭上包括兩個如本發明 在第-態樣提供的結構，在上的結構為第一結構， 第二結構，且第一結構和第二結構朝向相同；第： 、’、。構的第一阻擒部的外徑和第二結構的第二阻擔部的外 8 201242630 徑均小於或等於中、、 外徑大於肩狀部的二孔：肩狀部的内徑；第-偏轉部的 的内徑；第-偏轉偏轉部的外徑纽中心通孔 中心通孔和肩狀部:二，部之間的間隔大於或等於 時可向上通過肩狀部，在:二結=設置為在注射 孔=注:::構：設置為在注射時可向上通過中心通 ^主射儿畢回拉時不可再向下通過中心通孔。 在本發明的較佳實施方 轉部為整片式或者分片式。帛偏轉朴/或第一偏 輟邮發明的較佳實施方式中，第—偏轉部和/或第二偏 轉。Ρ為圓形或多邊形。 在本發明的較佳實施方式中，芯桿為整體注塑成型。 /下將結合圖式對本發明的構思、具體結構及產生的 技術效果作進-步說明，以充分地暸解本發明的目的、特 徵和效果。 、 【實施方式】 圖4顯示根據本發明的結構的一個實施例的示意圖， 其中結構100依次包括三個部分：偏轉部1〇1、連接部 102、阻擋部1〇3，其中偏轉部1〇1被設置為可在外力作用 下向圖中的上下方向偏轉，如圖4(b)和圖4(c)所示。 偏轉部101較佳由具有一定撓性的材料如塑膠製成，這樣 當外力被撤去時，偏轉部101回復至如圖4 所示的初 始位置。該偏轉部101的直徑大於阻擋部1〇3的直徑。連 201242630 接部102的直徑小於偏轉部ι〇1和阻擋部1〇3的直徑，且 連接部102的長度’亦即偏轉部ι〇1和阻擋部ι〇3之間的 間隔距離被設置為當偏轉部1〇1向阻擋部1〇3稍稍偏轉即 會因抵觸到阻擋部1〇3的周緣1〇4而不能繼續偏轉，此時 偏轉後的偏轉部1〇1形成了錐面1〇5。錐面1〇5形似很淺 的碟狀，且錐面105的錐度可通過調整連接部1〇2的長度 亦即偏轉部1〇1和阻擋部103的間距和兩者的直徑差而進 仃调整。當偏轉部1〇丨朝向與阻擋部1〇3相反的方向偏轉 時，由於沒有阻擋部1〇3的限制，偏轉部1〇1可以自由 轉。 與這樣的結構100相配合的關口的内徑通常被設置為 稍大於阻擋部103的直徑而稍小於偏轉部1〇1的直徑，這 樣當該結構以阻擋部103在前通過該關口時，阻擋部1〇3 和連接部102可以毫無阻礙的通過關口，而偏轉部ι〇ι在 關口的作用下，可朝向與阻擋部1〇3相反的方向自由偏 轉，從而輕鬆地通過該關口；而當該結構往回移動時，偏 轉部101首先和_ 口接觸，在關口作用下偏轉部1〇1向阻 擋部103偏轉且抵靠在阻氆部1〇3的周緣1〇4上，從而不 能繼續偏轉。通過選擇適合的連接部1〇2的長度亦即偏轉 部和阻擋部103的間距可使片狀件1〇1形成的錐面ι〇5 被设置為在使用者進行手動操作時，錐面1〇5被堵在關口 處而不能通過’然而當通過㈣等手段施加足夠大的外力 在該結構100上，錐面105可通過使關口發生彈性變形而 硬擠過該關口，從而使結構1〇〇通過該關口。 201242630 例如，結構⑽較佳為整體注塑而成，偏轉部ι〇ι的 旱度較佳在0.2mm至l.〇mm之間，而連接部脱的長度， f即偏轉部ΗΠ和阻擔部1G3之間的間隔距離較佳為小於 〇.7mm。 _偏轉部101具有多種可能的實施例，如圖5、6、7所 不的整片式和多片式，以及圓形或多邊形等。 圖8-11顯示將上述結構1〇〇應用至一次性注射器芯桿 1和針筒2間的卡鎖的—個實施例。如圖8、u所示，在 該一次性注射器的芯^上間隔地設置有兩個上述的結構 00其中在上的第-結構1〇〇a和在下的第二結構⑽匕 的朝向相反。如圖9、11所示，針筒2内侧間隔地設置有 上肩狀部2(Π和下肩狀部搬’且其中第一阻播部職和 第二阻擔部103b的外徑均小於或等於上肩狀部2〇ι和下 肩狀部202的内徑，而第一偏轉部咖的外徑大於上肩狀 邛201的内控’第二偏轉部1〇lb的外獲大於下肩狀部搬 的内徑，第-偏轉部101a和第二偏轉部難之間的間隔 大於或等於所述上肩狀部2〇1和下肩狀部搬之間的間 隔。為了便於製造，第—結構職和第二結構議的各 部的大小較佳是各自相同的；上肩狀部2〇1和下肩狀部2〇2 的内控較佳是相同的。而在注射完畢後回拉站桿時第二結 構騰被設置為可向下通過上肩狀部2〇ι，但不可再向上 通過所述下肩狀部2〇2,而所述第一結構職則被設置為 不可向下通過所述上肩狀部2〇1。 採用了上述設置的芯桿和針筒可以採用現有技術中 201242630 動機械裝方式進行裝配’如在普通注射器圓盤式自 θ因二、機上進行裝配’而無需使用輔助的裝配圈。這 二==裝配時，第一結構跡的第—轉部1咖 結構二;=轉上 的方向“μ 背離第一阻擋部103a 由偏轉而可輕鬆地通過上肩狀部201和下肩狀邻7J Π 分 J In view of the above-mentioned deficiencies of the prior art, the present invention is: providing a structure for a secondary syringe and should be =: two = shot: making the needle pull back and the lock of the core rod more 疋The assembly of a disposable syringe is simpler. In order to achieve the above object, the present invention is in the first state: the structure of the secondary syringe, the structure includes two types which are sequentially connected: in the # and the chute portion, the deflection portion can be oriented toward the resisting portion or the vest connecting the diameter of the rotating portion is larger than the resistance The diameter of the sowing portion, the diameter of the connecting portion and the diameter of the connecting portion, and the length of the connecting portion, that is, the deflecting portion: the side of the tapered surface, which is away from the blocking portion = in the preferred embodiment of the present invention In the way of the slice. The rotating part is a whole piece or divided into 201242630. (4) In another preferred embodiment, the deflecting portion is circular or more. In another preferred embodiment of the present invention, the type of structure is an integral injection molding. The invention further provides a τ rod, wherein the core rod is sub- The syringe, including the syringe and the core structure, the structure on the top; the invention is provided in the first aspect and the first structure is the second structure, the lower part and the lower shoulder: the upper side of the barrel is provided with an upper shoulder Shape ": 7 ^^; ^^ 艟仏 'The outer diameter of the first deflection unit is larger than the inner circumference of the upper shoulder. The second deviation == the outer diameter is larger than the inner diameter of the lower core; the first - (four) interval =, greater than or equal to The upper shoulder and the lower shoulder are: π, 4 after the ton ride, the second structure is set to pass down through the upper shoulder, for ~Jn Butong by MM ml through the lower wire, (four) - structure Then it is not allowed to pass down the upper shoulder. The machine is configured to deform the syringe in a preferred embodiment of the present invention. The rotor is either a full-piece or a split-type. Deflection or second offset In a preferred embodiment of the invention, the first turn is circular or polygonal. Or first, in a preferred embodiment of the invention, the core rod is integrally injection molded. 201242630 The present invention also provides a sub-surgical syringe comprising a syringe and a core in which a table is spaced apart from the core cup and a structure according to the first aspect of the present invention, and the table is on the top The structure is lower, and the deflecting portion of the structure and the lower end surface of the table portion face each other; the inner side of the barrel is provided with an upper shoulder portion and a lower shoulder portion; the outer diameter of the table portion is larger than that of the upper shoulder portion The inner diameter, and the circumference of the upper end surface of the table (four) is set as a slope; the outer surface of the damming portion of the structure; ί: less than or equal to the inner diameter of the upper shoulder portion and the lower shoulder portion, the structure of The outer diameter of the deflecting portion is greater than the outer diameter of the lower shoulder; the structure is configured to pass downwardly through the upper shoulder but not upwardly through the lower shoulder. In a preferred embodiment of the invention, the structure is configured to elastically deform the syringe to push up through the lower shoulder when the disposable syringe is machine assembled. In the preferred embodiment of the present invention, the deflection unit of the structure is of a one-piece type or a slice type. Preferably, in the fourth embodiment of the invention, the rotating portion of the structure (10) is circular or polygonal. In the preferred embodiment, the core rod is integrally injection molded. The invention also provides a disposable syringe comprising a needle seat and a syringe=, wherein the cutting piece further comprises a cutting piece with a central through hole, the supporting piece is attached to the inner wall of the needle hole, the needle seat is held in the needle barrel and a shoulder is provided in the hole between the support members, and the head of the core rod includes two structures as provided in the first aspect of the present invention, and the upper structure is the first structure, the second structure, and The first structure and the second structure are oriented the same; the first: ', '. The outer diameter of the first blocking portion of the second blocking portion and the outer diameter of the second resisting portion of the second structure 201242630 are less than or equal to the middle hole, and the outer diameter is larger than the two holes of the shoulder portion: the inner diameter of the shoulder portion; - the inner diameter of the deflecting portion; the outer diameter of the first-deflecting deflecting portion; the central center through-hole center through-hole and the shoulder portion: when the interval between the two portions is greater than or equal to, the upward passing through the shoulder portion, at: = set to the injection hole = Note::: configuration: set to be able to pass through the center through the center when the injection is pulled back and then can not pass down through the center through hole. In the preferred embodiment of the invention, the rotating portion is of a one-piece or split type. In a preferred embodiment of the invention, the first deflection unit and/or the second deflection. Ρ is round or polygonal. In a preferred embodiment of the invention, the core rod is integrally injection molded. The concept, the specific structure and the technical effects produced by the present invention will be further described in conjunction with the drawings to fully understand the objects, features and effects of the invention. [Embodiment] FIG. 4 is a schematic view showing an embodiment of a structure according to the present invention, wherein the structure 100 sequentially includes three parts: a deflection unit 1〇1, a connection portion 102, and a blocking portion 1〇3, wherein the deflection unit 1〇 1 is set to be deflected in the up and down direction in the figure by an external force, as shown in Fig. 4 (b) and Fig. 4 (c). The deflecting portion 101 is preferably made of a material having a certain flexibility such as plastic, so that when the external force is removed, the deflecting portion 101 returns to the initial position as shown in Fig. 4. The diameter of the deflecting portion 101 is larger than the diameter of the blocking portion 1〇3. The diameter of the joint portion 102 of the 201242630 is smaller than the diameter of the deflecting portion ι1 and the blocking portion 1〇3, and the length of the connecting portion 102, that is, the distance between the deflecting portion ι1 and the blocking portion ι3 is set to When the deflection unit 1〇1 is slightly deflected toward the blocking portion 1〇3, the deflection can not be continued due to the contact with the circumference 1〇4 of the blocking portion 1〇3, and the deflected deflection unit 1〇1 forms a tapered surface. 5. The tapered surface 1〇5 is shaped like a shallow dish, and the taper of the tapered surface 105 can be adjusted by adjusting the length of the connecting portion 1〇2, that is, the pitch of the deflecting portion 1〇1 and the blocking portion 103, and the difference in diameter between the two. Adjustment. When the deflecting portion 1〇丨 is deflected in a direction opposite to the blocking portion 1〇3, the deflecting portion 1〇1 can freely rotate without the restriction of the blocking portion 1〇3. The inner diameter of the gate that cooperates with such a structure 100 is typically set to be slightly larger than the diameter of the barrier portion 103 and slightly smaller than the diameter of the deflection portion 1〇1 such that when the structure passes the barrier forward through the barrier 103, the barrier is blocked. The portion 1〇3 and the connecting portion 102 can pass through the gate without any hindrance, and the deflecting portion ι〇ι can be freely deflected in the opposite direction to the blocking portion 1〇3 under the action of the closing opening, thereby easily passing the opening; When the structure moves back, the deflecting portion 101 first comes into contact with the _ port, and the deflecting portion 1〇1 deflects toward the blocking portion 103 under the action of the gate and abuts against the periphery 1〇4 of the damming portion 1〇3, thereby failing to Continue to deflect. By selecting the length of the suitable connecting portion 1〇2, that is, the pitch of the deflecting portion and the blocking portion 103, the tapered surface 〇5 formed by the sheet member 1〇1 can be set to be tapered when the user performs manual operation. 〇5 is blocked at the gate and cannot pass through. However, when a sufficient external force is applied to the structure 100 by means of (four) or the like, the tapered surface 105 can be hardly extruded through the gate by elastically deforming the gate, thereby causing the structure to be 〇 〇 Pass the pass. 201242630 For example, the structure (10) is preferably integrally molded, and the degree of dryness of the deflecting portion ιι is preferably between 0.2 mm and 1.0 mm, and the length of the connecting portion, f, the deflecting portion and the blocking portion The spacing distance between 1G3 is preferably less than 〇.7 mm. The deflecting portion 101 has various possible embodiments, such as a full-chip type and a multi-piece type as shown in Figs. 5, 6, and 7, as well as a circular or polygonal shape and the like. Figures 8-11 show an embodiment in which the above structure 1 is applied to the latch between the disposable syringe plunger 1 and the syringe 2. As shown in Fig. 8, u, two of the above structures 00 are disposed at intervals on the core of the disposable syringe, wherein the upper first structure 1a and the lower second second (10) are opposite in orientation. As shown in FIGS. 9 and 11, the inner side of the syringe 2 is provided with an upper shoulder portion 2 (the lower shoulder portion and the lower shoulder portion), and wherein the outer diameters of the first blocking portion and the second blocking portion 103b are smaller than Or equal to the inner diameter of the upper shoulder portion 2〇1 and the lower shoulder portion 202, and the outer diameter of the first deflecting portion is larger than the inner control of the upper shoulder portion 201. The second deflecting portion 1〇1b is larger than the lower shoulder. The inner diameter of the movable portion, the interval between the first deflecting portion 101a and the second deflecting portion is greater than or equal to the interval between the upper shoulder portion 2〇1 and the lower shoulder portion. For ease of manufacture, - the size of each part of the structural and second structure is preferably the same; the internal control of the upper shoulder 2〇1 and the lower shoulder 2〇2 is preferably the same, and the pull-back station after the injection is completed When the rod is in the second structure, the second structure is arranged to pass downward through the upper shoulder 2〇, but can no longer pass upward through the lower shoulder 2〇2, and the first structural position is set to be non-downward Through the upper shoulder 2〇1. The core rod and the syringe adopting the above arrangement can be assembled by the prior art 201242630 dynamic mechanical installation method. The ejector disc is self-contained by θ, and the assembly is performed on the machine' without the use of an auxiliary assembly ring. These two == assembly, the first structure of the first-turn part 1 coffee structure two; = the direction of the turn " μ away from the first blocking portion 103a by the deflection and can easily pass through the upper shoulder 201 and the lower shoulder
加’而第二結構_的第二偏轉部咖J =_的偏轉受到第二阻撞部職的周緣的限制:形 :二錐面，然而與圖”卡合凸緣22的倒錐形不同，在 的作用下’第二偏轉部_形成的錐面 被5又置為可通料輯輯絲的力使 ;’而在裝配過程中硬擠過上肩狀物和下肩狀= =進針筒2巾。纽射完㈣拉芯桿4，第—結構嶋 和第-結構H)0b的錐面均被設置為不能通過操作者手動 操作而產生的力擠過上肩狀部期或下肩狀部2G2， 實現了芯桿1和針筒2間的卡鎖。 採料種卡鎖方式，—方面在裝配時可不再使用裝配 圈，從而即令了工序和成本，且裝配方式與普通一次性注 射器相同，可以在現有的自動裝配機上進行裝配。另一方 面在使用完畢回拉芯桿丨進行卡_，無需任何硬性 壓過程，因此整個回拉和卡鎖過程阻力很小，輕鬆省力。 此外，也可將第-結構·替換為如圖12所示的外 徑大於上肩狀部201的台狀部1〇4,其中台狀部⑽的上 端面的周緣被形成為斜面以便裝配，由於在裝配時需使a 12 201242630 狀邛104硬擠過内棱小於其的上肩狀部撕，因此這種配 置使裝配時需克服的阻力更大。 圖13不出了將根據本發明的結構應用於針座的回拉 的個實知例，圖中3為針座、2為針筒、*為帶有中心 ^孔41的支撐件、5為芯桿1的桿頭，支撐件4連接在針 筒2上的卡槽25中，針座3被定位在針筒2和支樓件4 之間，+針座3的内孔31中還設置有肩狀部32。如圖中所 不’在芯桿1的桿頭5上間隔地設置了第三結構職和第 四結構100d ’其中第三結構職和第四結構觀的朝向 • 相同，且匕們的阻擋部1〇3c、1〇3d的直徑都小於支禮件* -的中心通孔41和肩狀部32 _徑，而它們的偏轉部 lc 101d的直控都大於支撐件4的中心通孔41和肩狀 部32的内徑。注射時，第三結構·的第三偏轉部版 通過向％離第三阻擋部103c的方向自由偏轉而輕鬆地通 過設置在針座3的内孔31中的肩狀部32，第四結構刪 的第四偏轉部l〇ld通過向背離第四阻擋部1〇3d的方向自 由偏轉而輕鬆地通過支撐件4的中心通孔4卜當注射完畢 後回拉心桿1時，第四結構1〇〇d的第四片狀件向第 四阻擋部103d偏轉，由於受到第四阻擋部1〇3d的限制， 第四片狀件l〇ld只能稍稍偏轉就抵靠在了第四阻擋部 l〇3d的周緣上，進而對支撐件4施加向下的拉力，使支撐 件4與針筒2脫離。同樣地，第三結構1〇〇c在回拉的過程 中，抵靠在第三阻擋部103c上的第三偏轉部1〇lc通過肩 狀部32將針座3拉回針筒2内。 13 201242630 在上述的實施例中，由於採用了根據本發 怎桿W桿頭5通過支撐件4的“通孔41和肩=3,2 的過紅阻力削、’從而㈣作者·起來十分自如 過程更加穩定，減少了被料者的不適感。 離 以上所述僅為舉麻，㈣為關性者。任 精神與料，而對其進行之等效修改或變更均 心匕3於後附之申請專利範圍中。 二 結構 圖式簡單說明】 圖1顯示現有技術中將設置在芯桿上的將針座 回拉的 圖2顯示現有技術中針筒和芯桿間的卡鎖結構。 圖3顯示現有技術中裝配用的輔助裝配圈。 一個==二）和⑴顯示根據本發明的—種結構的 例 圖5顯示根據本發明的結構的偏轉部的一個具體實施 施例 圖6顯示根據本發明的結構的偏轉部的另一個具體實 施例 圖7顯示根據本發明的結構的偏轉部的另一 個具體實 圖8顯示採用了本發明的結構的—次性注射器的芯桿 的一個具體實施例。 圖9顯示與圖8中的芯桿相配合的針筒的一個具體實 201242630 施例。 圖10顯示圖8中的芯桿和圖9中 態時的示意圖。 叼針同處於卡鎖狀 圖11顯示圖10中A處的放大圖。 圖12顯示圖11中八處的-個可替代的實施方式。 圖13顯不本發a月的結構應用於—次性注射器的針座 處的一個具體實施例。 【主要元件符號說明】 1 .芯桿 100 :結構 l〇〇a :第一結構 l〇〇b ·•第二結構 100c :第三結構 l〇〇d :第四結構 101 :偏轉部（片狀件） l〇la :第一偏轉部 l〇lb :第二偏轉部 101c.第三偏轉部 l〇ld:第四偏轉部（第四片狀件） 102 :連接部 103 :阻擋部 103a :第一阻擋部 l〇3b :第二阻擋部 15 201242630 103c :第三阻擋部 103d :第四阻擋部 104 :台狀部（周緣） 10 5 :錐面 11 :錐形台結構 12 :肩狀部 2 :針筒 201 :上肩狀部 202 :下肩狀部 21 :卡合凸緣 22 :卡合凸緣 23 :卡合肩狀部 24 :裝配圈 25 :卡槽 3 :針座 31 :内孔 32 :肩狀部 4 :支撐件 41 :中心通孔 5 :桿頭 A . A處 16The deflection of the second deflection portion of the second structure _ J = _ is limited by the circumference of the second blocking portion: a shape: a biconical surface, but different from the inverted conical shape of the engagement flange 22 Under the action of the 'second deflection part _ formed by the cone surface is again set to the force of the flux can be passed; 'and in the assembly process hard squeezed over the upper shoulder and the lower shoulder = = Syringe 2 towel. New-shot (4) core rod 4, the first structure and the first structure H) 0b cone are set to be unable to force the upper shoulder period by the operator's manual operation or The lower shoulder 2G2 realizes the locking between the core rod 1 and the syringe 2. The picking type of the picking type, the assembly ring can no longer be used in the assembly, thereby making the process and cost, and the assembly method is common. The disposable syringe is the same and can be assembled on the existing automatic assembly machine. On the other hand, after the core rod is used, the card is _, no hard pressing process is required, so the whole pull-back and latching process has little resistance and is easy. In addition, it is also possible to replace the first structure with the outer diameter larger than that of the upper shoulder 201 as shown in FIG. a portion 1〇4, wherein the periphery of the upper end surface of the table portion (10) is formed as a slope for assembly, since the a 12 201242630 shaped crucible 104 is hard to be squeezed over the inner edge of the upper shoulder portion This configuration makes the resistance to be overcome during assembly larger. Fig. 13 shows a practical example of applying the structure according to the present invention to the back pull of the needle holder, in which 3 is a needle holder, 2 is a syringe, and * For the support with the center hole 41 and the head of the core rod 1, the support member 4 is connected in the card slot 25 on the syringe 2, and the needle holder 3 is positioned between the syringe 2 and the branch member 4. Further, a shoulder portion 32 is further disposed in the inner hole 31 of the + needle holder 3. As shown in the figure, the third structural member and the fourth structure 100d are disposed at intervals on the head 5 of the core rod 1. The orientation of the three structural and fourth structural views is the same, and the diameters of the barriers 1〇3c, 1〇3d are smaller than the central through hole 41 and the shoulder 32_ diameter of the gift member*, and they The direct control of the deflection portion lc 101d is greater than the inner diameter of the central through hole 41 and the shoulder portion 32 of the support member 4. At the time of injection, the third deflection portion of the third structure passes through the third resistance The direction of the portion 103c is free to deflect and easily passes through the shoulder portion 32 provided in the inner hole 31 of the hub 3, and the fourth deflection portion 10d1 of the fourth configuration is directed away from the fourth barrier portion 1〇3d. Freely deflecting and easily passing through the center through hole 4 of the support member 4, when the core rod 1 is returned after the injection is completed, the fourth sheet member of the fourth structure 1〇〇d is deflected toward the fourth blocking portion 103d, due to the With the limitation of the four blocking portions 1〇3d, the fourth sheet member l〇ld can only abut against the circumference of the fourth blocking portion 10〇3d with a slight deflection, thereby applying a downward pulling force to the support member 4 to support The piece 4 is disengaged from the barrel 2. Similarly, during the pulling back of the third structure 1〇〇c, the third deflection unit 1〇lc which abuts against the third blocking portion 103c passes the needle holder 32 through the shoulder 32 3 Pull back into the syringe 2. 13 201242630 In the above embodiment, the author uses the "through hole 41 and the shoulder = 3, 2 of the red resistance to cut through the support member 4 according to the present invention." The process is more stable and reduces the discomfort of the material. The above is only for the purpose of numbness, and (4) is the person of the genius. Any spirit and material, and the equivalent modification or change to it is attached. The scope of the patent application. Brief Description of the Two Structures FIG. 1 shows the prior art in which the needle holder is placed on the core rod. FIG. 2 shows the latch structure between the needle barrel and the core rod in the prior art. 3 shows an auxiliary assembly ring for assembly in the prior art. One == two) and (1) shows an example of a structure according to the present invention. FIG. 5 shows a specific embodiment of a deflection portion of the structure according to the present invention. FIG. Another Specific Embodiment of the Deflection Section of the Structure of the Present Invention FIG. 7 shows another embodiment of the deflection section of the structure according to the present invention. FIG. 8 shows a specific implementation of the core of the secondary syringe using the structure of the present invention. Example. Figure 9 shows A specific embodiment of the syringe 20120230 that cooperates with the core rod of Fig. 8. Fig. 10 shows a schematic view of the core rod of Fig. 8 and the state of Fig. 9. The needles are in the same shape as shown in Fig. 11. Fig. 10 An enlarged view of the middle A. Fig. 12 shows an alternative embodiment of the eight in Fig. 11. Fig. 13 shows a specific embodiment of the structure of the present invention applied to the needle holder of the secondary syringe. [Description of main component symbols] 1. Mandrel 100: Structure l〇〇a: First structure l〇〇b • Second structure 100c: Third structure l〇〇d: Fourth structure 101: Deflection section (sheet shape L〇la: first deflection unit l〇lb: second deflection unit 101c. third deflection unit l〇ld: fourth deflection unit (fourth piece) 102: connection part 103: blocking part 103a: a blocking portion l〇3b: second blocking portion 15 201242630 103c: third blocking portion 103d: fourth blocking portion 104: mesa portion (circumferential edge) 10 5 : tapered surface 11: tapered table structure 12: shoulder portion 2 : Syringe 201 : Upper shoulder portion 202 : Lower shoulder portion 21 : Engagement flange 22 : Engagement flange 23 : Engagement shoulder portion 24 : Mounting ring 25 : Card slot 3 : Needle seat 31 : Inner hole 32: Shoulder 4: Support 41: Center through hole 5: Head A. A 16