M281644 八、新型說明： 【新型所屬之技術領域】 本創作係有關一種安全注射器（三），尤指一種能透過推桿回 拉針具組時，自動彈抵内縮至注射筒内之針具組，令針具組呈偏 移角度，而無法二次使用之安全注射器。 【先前技術】 主射器係醫療作業上不可或缺之辅助器材，為避免因重覆使 用針頭導致疾病傳染，現今之注射器皆採用即棄式，以杜絕注射 器之再次使用，然而，用後拋棄之注射器常因處理不當，導致醫 護人員或清理人貝因誤觸注射針管受傷而或感染疾病。因此，如 何防止使祕之針誤觸恤齡人，便成為齡注射器構造 設計之一大考量問題。 曰别，處職驗注射ϋ之作法，德崎針管注射完畢丨 拉至注射筒内，如TW專利第M2 6 219 5號『安全注射器』 即屬典型之用畢回拉收_之安全注射器。其主要係透過插糾 ^射針管讀管紗接合套姑螺合，並於接合套之絲開設一 =形洞孔，洞孔躲並財扣錢置，且於接合套之-側朝下室 延伸犬起部’俾利’推液柱塞前端之錐形凸柱穿人雜形洞沿 推二:ΐ置卡抵:位時’突起部恰和彈性活塞呈抵頂關係，復將 提:突動:具組内縮至注射筒内時，則藉由彈性活塞 釺管::靠: 射间开Μ無法推進狀態，自然可防止吾棄之注射 M281644 針管札傷之情事一再發生。 攸而上述習知女全注射器結構設計，尚 仔細觀習知安全注射哭心‘ ^…仃汉。之處 *王左射為圖式所揭可知，該接合套底緣之底座部係 猎由一〇型環抵靠於注射筒辟 ^ #拉回時，該突起部 Γ該0型環魏胁注射筒之缝面，-並無空間可提= …且偏斜，而無法達到如該案中之圖5 c完全偏離之目的者。 :，該套設在突孔部之接合套，係透過底端朝外緣擴張之 伙— 抵罪防脫關係，相對也因該底座部凸露 於注如之谷室，導致該儲存藥液之注射筒容量不賴失，此種 =絲透過=或加寬注射筒加以解決，但對於各種藥液儲量 *疋之統-内谷1之注射筒而言，注射筒加寬或 外開模之成本支付缺失實非理想； 域頟 又，如不延長或加增注射筒尺寸，對於藥液量不精確時，恐 又會ie成注入人體之藥效無法精確控制。 【新型内容】 敍，摘作树決上述安全注射时在之技術課題，係將 注射筒_收束段内部之突孔後端，成形—細傾斜擴張之飢 口，復將針具組之接合套底端形成相對應之斜錐段，俾利針具組 套入結合於突鱗，接合套之斜錐段和恰呈—域狀，斜 錐段底端朝下延伸之麵部則凸露在注射筒之容室内，待推桿推 進將藥液完全注人人體時，前端之彈性活塞則和突起部呈^關 M281644 係，藉由突起部和彈性活塞呈抵頂關係，讓内縮至注射筒内之針 具組產上無法再次推出之偏移卡抵狀，其中本創作之功能與目的 如下： 1、 因本創作斜錐段之最大半徑係小於注射筒之容室半徑， 因此下拉時該斜錐段之底緣與注射筒之内壁仍保持一定距離，而 可達到確實偏移之目的者。 2、 本創作中利用接合套之斜錐段和喇队口呈一切齊狀，因 * 此接合套並未佔據注射筒内之容室空間，而僅有突起部伸入容室 内，因此可太幅降低接合套對於注射筒内藥劑容量精確性之影響。 3、 另本創作之〇型環其可直接定位於斜錐段之上方，可抵 靠於突孔之壁面，因此同樣具有防止滲液及定位之目的。 【實施方式】 本創作係有關—種安全注射器（三），請參照第-圖所示，該 安全注射器包括有： ^注射筒（10)，為一中空圓筒體，一端形成有一略縮之收束 & ( 1 1 )’ 一端則形成有擴大狀之托指段（1 2 )，又，注射筒 (1 〇 )内部形成有-容室（1 3 )，收束段（1 1)⑽則設有 連通容室f "I q、 丄d〕之漸縮孔徑之突孔（1 4 )，令容室（1 3 )和 孔:略小之突孔（14)銜接處形成有擋緣，又圓柱狀之突孔靠 ^谷至方向朝内漸擴成傾斜之外八口（ ί 4 1 )，該突孔（1 4 ) 配合該’八口而形成—“漏斗”狀，且突孔（14)與♦八口之 相鄰處壁面環設有一卡槽（15); 7 M281644 推才干（2 Ο )，係可活動插設在注射冑（1 〇 )之容& 3)内，亚可於容室内做直線往復滑移，該推桿（2 〇)至日(1 (2 1 )柄形成有獻狀之純部（2 2 )，前端_ 2身 個間隔盤體所構成之結合部（2 3) 有—數 伸出一槐葩口邠（23)前端則延 ，榫碩(2 4)，另有一彈性活塞(25)係穿 後，设於結合部（2 3); 、2 4) 一針具組，包括有-針管（31)、—針管座（ 合套（3 3)，其中： 及—接 該針管（3 1 )係插設固定於針管座（3 2 )，針管 適當處形財—外餘之_卡環（3 2 i )，顧缝 套盍針體形成一抵靠面’針管座（3 2)之卡環（3 則設有外螺紋（3 2 2 )，以利鎖接一接合套（3 3 );下方 該接合套（3 3 )，係由容室朝突孔方向套入，且為達 套和突孔之接合密合性’接合套（3 3)係採對應突孔^ ^ 之“漏斗”狀設計，該漏斗狀接合套（3 3)包括—圓形結合段 (3 3J )及一斜錐段(3 3 2 )，結合段(3川和斜錐段(： 3 2)交會處外表緣形成有較小徑之環凹槽（3 3 3 )，環凹槽（3 3 3 )内並套設橡膠之〇型環（3 4 )，俾利接合套（3 3 )曰套入 突孔（1 4 )日寺，〇型環（3 4 )外徑恰落在突孔壁面環設之卡 槽（1 5 )’以強化接合套和突孔間之結合強度，具有防止接合套 (3 3 )由注射方向脫離功效；另該斜錐段（3 3 2)之最大一 徑係小於注射筒之容室半徑。 半 M281644 一 六H 一、三圖所示，接合套軸向形成有一貫穿連通狀之 谷置邵(3 3 4 )，办 形成之錐开/、、 ’、置°卩（3 3 4 )並連通斜錐段底面朝内漸縮M281644 8. Description of the new model: [Technical field to which the new model belongs] This creation relates to a safety syringe (3), especially a needle that can automatically retract into the syringe when the needle set is pulled back through the push rod. Safety syringes that make needle sets at an offset angle and cannot be used again. [Previous technology] The main emitter is an indispensable auxiliary device in medical operations. In order to avoid the disease infection caused by repeated use of needles, today's syringes are all disposable to prevent the reuse of syringes. However, they are discarded after use. Improper handling of syringes often results in medical personnel or cleaning personnel being injured or infected by accidentally touching the injection needle. Therefore, how to prevent the secret needle from accidentally touching the aging people has become a major consideration for the design of the aging syringe. Say goodbye to the post-injection injection method. After Tokusaki needle injection is completed, pull it into the syringe, such as TW Patent No. M2 6 219 5 "Safety Syringe", which is a typical safety syringe that is pulled back and closed. It is mainly used to insert the correcting needle through the needle tube to read the yarn splicing sleeve, and open a hole in the shape of the splicing sleeve. The hole is hidden and the money is deducted, and the side of the splicing sleeve is facing the lower chamber. The conical convex column at the front end of the extension dog's pusher plunger passes through the hole with a conical protrusion. Pushing the two: ΐSetting and snapping: When the position is raised, the protrusion is in abutting relationship with the elastic piston. Sudden movement: When the tool is retracted into the injection cylinder, the elastic piston is used to stern the tube :: Relying: The shooting room cannot be advanced, naturally it can prevent the repeated injection of the needle M281644 needle stabbing. In view of the structure design of the above-mentioned female all-syringe, I still have to pay close attention to my knowledge of safe injection crying ^ ^ 仃 Han. Where * Wang Zuoshe is revealed by the figure, it can be known that the base portion of the bottom edge of the joint sleeve is hunted by a 10-shaped ring against the injection barrel ^ # When pulled back, the protrusion Γ the 0-shaped ring The seam surface of the injection cylinder,-there is no space to mention =… and it is skewed, and it cannot achieve the purpose of completely deviating as shown in Figure 5c in the case. : The joint sleeve set in the protruding hole is a gang that expands toward the outer edge through the bottom end. It is a crime-proof and anti-off relationship. Relatively, the base part is exposed in the trough of the injection, resulting in the storage of the liquid medicine. The volume of the syringe is not lost. This kind of = silk penetration = or widening the syringe is the solution, but for the various medicinal fluid reserves * 疋 之 统-Neigu 1 syringe, the cost of widening the syringe or opening the mold outside The lack of payment is not ideal; if you do not extend or increase the size of the syringe, you may not be able to accurately control the effect of the injection into the human body when the amount of the medicine is inaccurate. [New content] Narrative, extract the tree to determine the technical problem in the above safety injection, which is the rear end of the protruding hole in the injection barrel _ bunching section, forming-thin inclined expansion of the hunger, and the needle assembly The bottom end of the sleeve forms a corresponding oblique cone section. The sharp needle set is inserted into the scales, and the oblique cone section of the joint sleeve is just-domain-shaped. The face extending downward at the bottom end of the oblique cone section is exposed. In the container of the syringe, when the pusher is pushed to fully inject the liquid into the human body, the elastic piston at the front end is related to the protrusion M281644, and the protrusion is in an abutment relationship with the elastic piston, so that it is retracted to The offset card can not be re-launched on the needle set in the syringe. The function and purpose of this creation are as follows: 1. The maximum radius of the oblique cone section of this creation is smaller than the radius of the chamber of the syringe, so it is pulled down. At this time, the bottom edge of the oblique cone section still maintains a certain distance from the inner wall of the injection cylinder, and can achieve the purpose of true offset. 2. In this creation, the oblique cone section of the joint sleeve and the mouth of the team are all in the same shape, so * this joint sleeve does not occupy the space in the injection chamber, but only the protruding portion extends into the chamber. Reduce the impact of the adapter sleeve on the accuracy of the volume of the drug in the syringe. 3. In addition, the O-ring of this creation can be positioned directly above the oblique cone section and can abut the wall surface of the protruding hole, so it also has the purpose of preventing liquid leakage and positioning. [Embodiment] This creative department is related to a kind of safety syringe (3), please refer to the figure-. The safety syringe includes: ^ Injection cylinder (10), which is a hollow cylinder with a slight shrinkage formed at one end. Beam & (1 1) 'One end is formed with an enlarged finger support section (1 2), and the inside of the injection cylinder (10) is formed with a-chamber (1 3) and a bead section (1 1) ⑽ is provided with a protruding hole (1 4) with a tapered diameter that communicates with the chamber f " I q, 丄 d], so that the chamber (1 3) and the hole: a slightly smaller projecting hole (14) is formed at the joint Retaining edge, the cylindrical protruding hole gradually expands inwardly into the inclined eight holes (ί 4 1) in the direction of the valley, and the protruding holes (1 4) cooperate with the eight holes to form a "funnel" shape, And the wall surface ring adjacent to the protruding hole (14) and eight holes is provided with a card slot (15); 7 M281644 Push talent (2 〇), which can be inserted in the capacity of the injection port (1 〇) 3 ), Yake can slide linearly back and forth in the container. The putter (20) to the day (1 (2 1)) has a pure part (2 2) with a consecrated shape. The front end _ 2 is a spacer plate. The joints (2 3) formed by the number- The front end of a locomotive mouth (23) is extended, and the tenon is large (2 4). After the elastic piston (25) is tied, it is set at the joint (2 3);, 2 4) A needle set, including: -Needle tube (31),-Needle tube holder (combined (3 3), of which: and-connected to the needle tube (3 1) is inserted and fixed to the needle tube holder (3 2), the needle tube is in a proper position to form wealth-outside the rest_ Retaining ring (3 2 i). The needle body of the quilting sleeve forms a retaining ring (3 is provided with an external thread (3 2 2)) of the abutting surface of the needle tube seat (3 2), so as to facilitate the locking of an engaging sleeve ( 3 3); The joint sleeve (3 3) below is sleeved from the chamber toward the direction of the protruding hole, and the joint tightness of the joint between the sleeve and the protruding hole is used for the corresponding protruding hole ^ ^ The "funnel" design, the funnel-shaped joint sleeve (3 3) includes-a circular joint section (3 3J) and an oblique cone section (3 3 2), a joint section (3 Sichuan and oblique cone section (: 3 2 ) A small diameter ring groove (3 3 3) is formed on the outer edge of the intersection, and a rubber O-ring (3 4) is sleeved inside the ring groove (3 3 3), and a good joint sleeve (3 3) is formed. Said into the protruding hole (1 4) Risi, the outer diameter of the O-ring (3 4) just falls on the retaining groove (1 5) provided on the ring surface of the protruding hole. It strengthens the bonding strength between the joint sleeve and the protruding hole, and has the effect of preventing the joint sleeve (3 3) from detaching from the injection direction; in addition, the maximum diameter of the oblique cone section (3 3 2) is smaller than the radius of the injection chamber. Half M281644 As shown in Figures 1 and 3, the joint sleeve is formed in the axial direction with a through-connected trough (3 3 4), and the formed cone is opened / ,, ', set ° 卩 (3 3 4), and connected to the diagonal The bottom of the cone section tapers inward
/洞孔（A)，該錐形洞孔（A)周圍設置有複數個等弧 度配置之扣合穿置f U 、 ）’該扣合裝置（B )，係由錐形洞孔（a) 之土緣朝内凸設有一^ 成-穿孔(336二(3 3 5 )’卡合部(3 3 5 )中間形 可將榫頭卡人娜、*孔（3 3 6 )並如第二錢所示，使用時 权飾概（A)，即可綱f過权並和卡合部形成 狀又’略具彈性之榫頭（2 4 )穿過穿孔（3 3 6 )容 丄 ）内，彈性復位之榫頭（2 4)則無法再行 抽離。 再者，位於結合段之容置部（3 3 4)壁面則環設有内螺紋 (3 3 7 )可供針官座（3 2)之外螺紋（3 2 2)螺入結合， 至於斜錐& ( 3 3 2 )底面外周緣預設處鋪τ-體延伸一突起 斗（3 3 8 )’突起部（3 3 8 )常態下係凸露於容室（丄3)， 待推桿完全推人時推桿前端之·活塞恰受該突起部（3 3 8 ) 彈性抵頂，上述即為本創作安全注射器（三）之整體結構述敛， 至於本創作藉由上述結構元件運用，所能達狀結構功效如下： 復’該斜錐段之最大半徑係小於注射筒之容室半徑，因此下 拉時該斜錐段之底緣與注射筒之内壁仍保持一定距離，而可達到 確實偏移之功效。 另外接合套（3 3 )底端斜錐段（3 3, 2 )和突孔底端味>八 口（141)套合時，斜錐段（3 3 2)恰和容室和突孔銜接處 ’M281644 之擔緣呈切齊狀’僅突起部（3 3 8)凸露於容室（13 )，令接 合套（3 3)除突起部（3 3 8 )外，皆容設於突孔（工4)内 4穎又十月匕讓各至之儲藏藥液空間變大，藥液儲存空間變大 十於J C C數（如1c c注射器）之注射器而言，更是有立竿見 影之實用性功效產生。 如第三圖所示’當推桿（2 Q)往前推至定位時，棒頭（2 =係穿過穿孔（3 3 6 )容設在容置部（3 3 4)内，並和卡 δ I5 ( 3 3 5 )上端面呈卡抵狀態，而推桿前端之彈性活塞（2 ,)則又凸路於合至之突起部（3 3 8 )呈一抵頂狀態並略微變 形； 多…、第四、五圖所示，將推桿（2 0)回拉時會連帶將針具 組拉動並脫離突孔（14)，持續回拉直至針具組内縮至第五圖落 入/主射同容輯’财透過受㈣形之雜活塞（2/ Hole (A), a plurality of equal-arranged fastening fittings f U,) are provided around the tapered hole (A), and the fastening device (B) is formed by the tapered hole (a) The soil edge protrudes inwardly with a ^ -perforation (336 二 (3 3 5) 'engaging part (3 3 5)) in the middle shape, which can snap the tenon, * hole (3 3 6) and the second money. As shown in the figure, when using the right decoration (A), you can use the weight f and form a shape with the engaging part and a slightly elastic tenon (2 4) through the perforation (3 3 6) capacity), elastic The reset tenon (2 4) can no longer be removed. In addition, the wall of the accommodating part (3 3 4) located in the joint section is provided with internal threads (3 3 7) for the needle seat (3 2) and the external threads (3 2 2) to be screwed into the joint. Cone & (3 3 2) The outer periphery of the bottom surface is preset with a τ-body extending a protruding bucket (3 3 8) 'The protruding portion (3 3 8) is normally exposed in the chamber (丄 3), to be pushed When the rod is fully pushed, the piston at the front end of the push rod is elastically abutted against the protrusion (3 3 8). The above is the summary of the overall structure of the safety injector (3) of this creation. As for this creation, the above-mentioned structural elements are used. The effect of the reachable structure is as follows: The maximum radius of the oblique cone section is smaller than the radius of the chamber of the injection cylinder, so the bottom edge of the oblique cone section and the inner wall of the injection cylinder still maintain a certain distance when pulled down, and can reach The effect of true offset. In addition, the oblique cone section (3 3, 2) at the bottom end of the joint sleeve (3 3) and the bottom end of the protruding hole > When the eight mouths (141) are fitted, the oblique cone section (3 3 2) coincides with the chamber and the protruding hole. Only the protruding portion (3 3 8) protrudes from the receptacle (13) at the connection point, the supporting edge of the M281644 is cut in a uniform shape, so that the joint sleeve (3 3) is accommodated in all except the protruding portion (3 3 8). In the protruding hole (Ing. 4), the 4 digits and 10 digits of the dagger make the storage space for the medicinal solution larger, and the storage space for the medicinal solution becomes larger than the number of JCC (such as 1c c syringe), which is even more immediate. Practical effects are produced. As shown in the third picture, 'When the push rod (2 Q) is pushed forward to the position, the rod head (2 = tied through the perforation (3 3 6) is accommodated in the accommodation portion (3 3 4), and The upper end face of the card δ I5 (3 3 5) is in an abutting state, and the elastic piston (2,) at the front end of the push rod is convex and the protruding portion (3 3 8) is in an abutting state and deformed slightly; Many ..., as shown in the fourth and fifth figures, when the push rod (20) is pulled back, the needle group is pulled together and out of the protruding hole (14), and the pull is continued until the needle group is retracted to the fifth figure. Into / main shot with the volume 'Cai through the miscellaneous piston (2
^部（3 σ3 8)—彈性推迫力道’則自動將内縮至容室之針具組 性推抵種斜雜底緣躲賴之 =故可藉由_之峨椒御_ == 二:注射筒(1〇)内部之撐緣形成卡抵 匕？ 無法再次推擠凸露於外部， 丄） 再夫日n w ^相防錢管顺之情事發生。 施例二:唯r所示’係編安全_㈢第二實 心_対接合套_料差異，故* 相予以延用，諒此不再針對相同 構讀付 下僅就接合套差異處予以、、、4牛之，錢_冗載，如 10 M281644 觀之第七圖，該實施例之接合套（3 3 a)結合段（3 3工 a)和斜錐段（3 3 2 a)《會處，係朝外—體凸設有—環凸（3 4a)，以利接合套（33 a)#入突孔（14)日寺，可透過該環 凸/3 4 a)和突孔（丄4)壁緣之卡槽（i 5)呈一套卡關係 (第六圖所示），以強化針具組和注射筒間之結合穩固功效。 此外，值得一提的是，本創作將漏斗狀突孔配合由結合段及 斜錐段所構成之漏斗狀接合套，只需將接合套（3 3)套入突孔 ί ( 14)内，即可透過接合套之結合段（3 31)及斜錐段（3 3 2)交會處和喇队口（ 141)形成一定位關係，組裝上顯得 更為準確、快速。^ 部 （3 σ3 8) —The elastic pushing force will automatically push the needles retracted into the chamber to the oblique edge of the oblique hybrid to hide it. Therefore, _ 之 埃 椒 御 _ == 2 : The supporting edge inside the injection cylinder (10) forms a stuck dagger? Can't push it out to the outside again, 丄) The reunion day n w ^ phase defense money Guanshun happened. Example 2: Only the 'system safety_㈢Second Solid_ 対 Joint Sleeve_ material difference shown in r is shown, so * will be extended. Forgive me, I will not pay for the same structure only. ， 4 cattle, money _ redundant, such as the seventh diagram of 10 M281644, the joint sleeve (3 3 a) of this embodiment (3 3 a) and the oblique cone section (3 3 2 a) " At the meeting, it is outward facing—the body is convexly provided—annulus (3 4a), so that the joint sleeve (33 a) # enters the protruding hole (14), and can pass through the annular convex / 3 4 a) and the protruding hole. (丄 4) The card slot (i 5) on the edge of the wall shows a set of card relationships (shown in Figure 6) to strengthen the combination and stability between the needle group and the syringe. In addition, it is worth mentioning that in this creation, the funnel-shaped protruding hole is matched with the funnel-shaped joint sleeve composed of the joint section and the oblique cone section, and only the sleeve (3 3) is inserted into the protruding hole ί (14). That is, a positioning relationship can be formed between the intersection of the joint section (3 31) and the oblique cone section (3 3 2) and the Lataikou (141), and the assembly is more accurate and faster.
11 M281644 f圖式簡單說明】 第-圖係梢料纽彻㈢之 第二圖係本創作安全注射器（三） =忍圖。 咖㈢谢細面之剖面 =三二本創作安全注射器注射㈢使用時^。 圖 第五圖係本創作安全注射器（ 示意圖。 第六圖係本創作安全注射器（ 意圖。 第七圖係本創作安全注射器 圖〇 =四圖係本創作安纽㈣（三）針具_辦之狀態剖面示意 (三 )針具組回拉至底端時之偏移狀 )第二實施例之局部外觀剖面示 )第二實施例之接合套外觀示意 12 M281644 【主要元件符號說明】 10—— ---注射筒 1 1-- 一一一收束段 1 2—— ---托指段 1 3-- ---容室 14—— ---突孔 14 1- ---嗦丨j 口八p 1 5—— 卡槽 20-- ---推桿 2 1—— ---桿身 2 2-- ---按指部 2 3—— 結合部 24-- ---榫頭 2 5—— ---彈性活塞 3 1 -一 ---針管 3 2—— ——針管座 3 2 1- ---卡環 3 2 2-- ---外螺紋 3 3—— ——接合套 3 3a — ---接合套 3 3 1 ~ ---結合段 3 3 1a- ---結合段 3 3 2— ---斜錐段 3 3 2 a- ---斜錐段 3 3 3 — ---環凹槽 3 3 4 — ---容置部 3 3 5 — ---卡合部 3 3 6 — ---穿孔 3 3 7 — ---内螺紋 3 3 8-- ---突起部 34—— ---0型環 3 4 a — ---環凸 3 5—— 蓋體 A---- ---錐形孔洞 B---- ——扣合裝置 1311 M281644 f Schematic illustration] Figure-Figure is the tip of Newcher's. The second picture is the safety syringe (3) = tolerance map. A section of the cai xie noodles = thirty-two creative safety syringes for injection ㈢ when used ^. The fifth picture is the creative safety syringe (schematic drawing. The sixth picture is the creative safety syringe (intention. The seventh picture is the creative safety syringe picture 0 = the fourth picture is the original creation safety syringe (3) needles _ Office of the Status cross section (3) Offset of needle assembly when pulled back to the bottom end) Partial appearance cross section of the second embodiment) Appearance of the joint sleeve of the second embodiment 12 M281644 [Description of main component symbols] 10—— --- Injection cylinder 1 1-- One-to-one bundle segment 1 2---- Finger support segment 1 3-- --- Room 14---- Protrusion hole 14 1- --- 嗦 丨j 口 八 p 1 5—— Card slot 20-- --- Push rod 2 1 ---- --- Shaft 2 2-- --- Press finger 2 3-Joint 24---- Tenon 2 5 —— --- Elastic piston 3 1 -One --- Needle tube 3 2 —— —— Needle tube seat 3 2 1- --- Retaining ring 3 2 2-- --- External thread 3 3 —— —— Joint sleeve 3 3a — --- Joint sleeve 3 3 1 ~ --- Combination section 3 3 1a- --- Combination section 3 3 2---- Slanted cone section 3 3 2 a- ----- Slanted cone section 3 3 3 — --- ring groove 3 3 4 — --- accommodating part 3 3 5 — --- engaging part 3 3 6 — --- perforated 3 3 7 — --- internal thread 3 3 8-- --- protruding part 34---- 0 ring 3 4 a---- ring convex 3 5-cover A---tapered hole B--- Fastening device 13