1250033 九、發明說明： 【發明所屬之技術領域】 本發明係有關一種安全注射針筒，尤指一種利用兩端開 口之vy狀或V狀導引槽，以推拔斜度由下往上緊迫結合定位， 且推拉桿往順時針或逆時針任一方向轉動時，即可使針頭組 下推鬆脫而回收於筒狀本體内部者。 【先前技術】 按，針筒於注射完畢丟棄回收時，由於針管易札傷醫護 人員或清潔人員；因此，一種可在注射後將針頭連同推拉桿 回拉至針筒體内，再旋以推力使前端之針管彎曲毁壞之安全 注射針筒，遂因應而生。此類型專利見諸公告第189436、 356013、463639、414085 ' 384709、359621 ' 492328、 467752、475449、480185、497976、430565、471322、 332433、394027、447310 及 US Patent NO ： 5,385,557;4,747,830;4,677,980;5,242,400;4,986,813; 4,947,863;5,533,975;5，171，300;4,944,723····等各前案。 惟，習用之安全注射針筒，其主要構成係如第一圖所示， 於一筒狀本體（11)前設有一針頭插座（12)，並於針頭插座（12) 内壁設有定位用之-一凸點（121); *針柄（13)其相對於該凸 點（121)於外緣面設L型卡槽（131)，使得針柄（13)由筒狀本 體（11)之底面向上套設在針頭插座（121)内壁，如第二圖（A) 所示之狀態。 然查，此種結構至少存有下述二項缺失： 一、該L型卡槽（131)與凸點（21)卡套時，該凸點21)係 -5- 1250033 位於L蜇卡槽（13D之水平端的端點封閉處，因此，當推拉桿 (14)上推，使其前端之插入體（141)嵌入針柄（13)底緣之卡槽 (132)時，必須順時針或逆時針之特定方向轉動，才能使L型 卡槽（131)底端脫離凸點（121)之卡制；如此一來，使用者經常 轉錯方甸，而無法使針柄（13)順利由針頭插座（12)内下取。 二、此外，該針柄（13)與針頭插座（12)之結合面（15)，係 呈平直面，由於其結合面（15)必須密合，否則注射液會外洩， 惟，如此/來，如第二圖（B)所示，當針柄（13)轉動而脫離L型 卡槽（131)底端之卡制，準備下取時，推拉桿（14)必須用力向 下拉動針柄（13)，才能使其順利回收，因此，在使用上並不是 十分方便° 前述L蜇卡槽實施例為US Patent ΝΟ·5,273,543所揭 示，事實上利用L型卡槽以定位針柄之前案眾多，諸如： 5,533,970，...等眾多前案中；而利用螺紋結構定針柄之前案 亦頗多，諸如 4,944,723;4,978,340;5，171,300;4,947,863; 4,986,813....等美國專利案。再者，利用卡緊或緊迫方式定 位針柄之結構，見諸於：台灣公告492328,356013,359621， 463639····等專利，及美國 5,242,400;4,747,830;5,098,390; 5,370,619;4,911，693•…·等眾多前案。 誠然，各案皆有其特色及訴求，但從前案亦可發現，有的 針柄與針筒的結合緊密，但回收時較不易，亦有回收方便，但 結合緊密度不夠，易使注射液外洩；是故，習用安全注射針筒， 尚有諸多改善空間。 1250033 【發明内容】 其 性 緣是，本發明之主要目的，係在提供—種安全注射 同時兼具針柄結合時之密合度，以及取卸时時之方便 本發明之又一 推拔斜度原理及一 密合度之功效者。 目的，係當針柄結合在針頭插座時，利用 ^型或V型之兩端開σ導引槽，達到極佳 本發明之另—目的則是再次利用w型或V型導引槽 提供一種任一方向轉動，皆可將針柄迅速下推，以達使用1 性化及省力之功效增進者。 為達上述目的，本發明所採用之技術手段在於：該針筒 體前端之針頭插座内壁至少設有—個以上之小凸體，·該針頭 組之針柄周緣配合前述針頭插座之内壁面，設有一導引槽 該導引槽係兩端呈開口位於針柄之上周緣面，並由二開口之 高處朝下傾斜至中央低處形成定位部；藉此，該針柄可由導 引槽兩鳊任一開口導入小凸體，以旋轉一角度使小凸體位在 導引槽最低處之定位部，並迫使針柄由下而上緊迫在針頭插 座之内壁面；且當針柄被推拉桿帶動朝順、逆時針任一方向 轉動時，可使導引槽沿著小凸體滑動，迫使針柄下推，並由導 引槽其中一開口脫離小凸體，使針頭組回收於筒狀本體内。 進步，该針请體前端之針頭插座内壁面係呈上窄下寬 之圓錐形，而針頭組之針柄周緣亦設成上窄下寬之圓椎形， 使其結合面呈推拔斜面型態。藉此，針柄由下往上定位時愈 轉愈緊，而回拉時具有省力易脫離之方便性。 1250033 【實施方式】 首先，請參閱第三圖所示，本發明實施例包含有：一針筒 體（2)，其具備中空筒狀本體（21)及設前端部之針頭插座（22)， 其中，該針頭插座（22)内壁面至少設有一個小凸體（23)，圖式 為二個對稱之小凸點，其為較佳實施例；一推拉桿（3 )，具備桿 狀本體（31)及設於前端之活塞（32)，以及凸設於活塞（33)前 端面之嵌入體（33)，該嵌入體（33)呈圓錐狀且至少一側邊設 成平直面（331);—針頭組（4)，具備一中空之針柄（41)及設於 針柄前端之針管（42)，該針管（42)係可與針柄（41) 一體成型， 或是如第四圖所示，由兩個獨立結構體，然後再組套成針頭 組（4)，惟此係習用技術，容不贅述。此外，如第四圖所示，該針 柄（41)之外周緣可依需求設有一膠圈（45)。 該續參閱第三圖並配合第五、六圖所示，本發明之針頭 插座（22)内壁面設有二個之小凸體（23)，而針柄（41)相對於 該小凸體（23)設有導引槽（44)，該導引槽（44)係二端呈開口 (441)位於針柄（41)之上周緣面，並由二開口（441)之高處朝 下傾斜至中央低處形成一定位部（442)。 前述之導引槽（44)係如第七圖（A)所示，概呈一 vy型體， 亦可如第七圖所示，概呈一 V型體，其共同點是兩端高點為 開口（441)而傾斜中央低點形成定位部（442)。 該續閱第八圖所示，其顯示針柄（41)組裝在針頭插座 (22)内壁面之剖示圖，該針柄（41)可由導引槽（41)兩端任一 開口（441)由下往上導入小凸體（23)，並旋轉一角度使小凸 體（23)位在導引槽（44)最低處之定位部（442)，使得針柄（41) 由下往上緊迫在針頭插座（22)之内壁面，而一較佳實施例， -8- Ϊ250033 係針頭插座（22)與針柄（41)呈上窄下寬之圓錐形，如此一來， 針柄（41)與針頭插座（22)内壁面則呈現推拔斜面塑態，有利 於其組裝之方便性，以及結合面之密合度。 第九圖所示係本發明注射時之使用狀態剖示圖，利用推 拉桿（3)之推送，使筒狀本體（21)内部之注射液，由針管（42) 流出。 第十圖係注射完畢之剖示圖，該推拉桿（3)伸入筒狀本 體（21)，並使嵌入體（33)插入針柄（41)底緣之嵌槽（43)，由於 嵌入體（33)與嵌槽（43)皆呈圓錐狀，且至少一側設有平直面 (331)、（431)，因此當其插入組合時，會相互卡套，如第十一圖 _ 之放大剖示圖所示。因此，推拉桿（3)無論是第十二圖（A)或 十二圖（B)所示之順時針或逆時針方向轉動，皆可帶動針柄 (41)在針頭插座（22)内旋轉，且旋轉時導引槽（44)由定位部 (442)沿著小凸體（23)滑動，並呈現一向下之推力，迫使針柄 (41)下推，並由導引槽（44)右側或左側開口（441)脫離小凸體 (23) ，而使針頭組（4)如第十三圖所示順利用回收於筒狀本體 (21)内部。 此外，如第十四圖所示，本發明進一步可在針頭插座（22) · 前端形成一頂砥用環面（221)，並於環面（221)内緣與針柄 (41)間，設有一彈簧（24)，當該針柄（41)下移時，藉由該彈簧 (24) 之彈性推力，幫助針柄（41)向下，使其更順利回收於筒狀 ’ 本體（21)内部。 — 是以，本發明利用vy型或V型導引槽（44)兩端呈開口 (441)之特性，使用者回收針頭時，任—方向轉動推拉桿(3)皆 可使針柄（41)自動下推；再者，進一步配合推拔斜度之設計， -9- 1250033 使得針柄組裝時密合度佳，且向下退出時亦極為順暢，是故， 確具使用人性化及方便之功效增進。 綜上所述，本發明所揭示之技術手段，確具「新賴性、 「進步性」及「可供產業利用」等發明專利要件，祈請鈞 局惠賜專利，以勵發明，無任德感。 惟，上述所揭露之圖式、說明，僅為本發明之較佳實施例， 大凡熟悉此項技藝人士，依本案精神範疇所作之修飾或等效 變化，仍應包括本案申請專利範圍内。1250033 IX. Description of the invention: [Technical field of the invention] The present invention relates to a safety injection syringe, and more particularly to a vy-like or V-shaped guide groove which is opened at both ends to push the slope from bottom to top. When the positioning is combined and the push-pull rod is rotated in either clockwise or counterclockwise direction, the needle group can be pushed down and recovered and recovered inside the cylindrical body. [Prior Art] Press, when the syringe is discarded and discarded after the injection, the needle tube is easy to smear the medical staff or the cleaning staff; therefore, one can pull the needle together with the push-pull rod back into the syringe body after the injection, and then push the thrust A safety syringe that destroys the front end of the needle tube and causes it to occur. This type of patent is disclosed in Bulletin Nos. 189436, 356013, 463639, 414085 '384709, 359621 '492328, 467752, 475449, 480185, 497976, 430565, 471322, 332433, 394027, 447310 and US Patent NO: 5,385,557; 4,747,830; 4,677,980; 5,242,400 4,986,813; 4,947,863; 5,533,975; 5,171,300; 4,944,723····etc. However, the conventional safety syringe has a main structure as shown in the first figure. A needle socket (12) is arranged in front of a cylindrical body (11), and is positioned on the inner wall of the needle socket (12). a bump (121); the needle handle (13) is provided with an L-shaped card slot (131) on the outer edge of the bump (121) such that the needle handle (13) is formed by the cylindrical body (11) The bottom surface is sleeved upward on the inner wall of the needle socket (121), as shown in the second figure (A). However, this structure has at least the following two missing items: 1. When the L-shaped card slot (131) and the bump (21) are ferrule, the bump 21) is located in the L-card slot. (The end of the horizontal end of 13D is closed. Therefore, when the push-pull rod (14) is pushed up, the insertion body (141) of the front end is inserted into the slot (132) of the bottom edge of the needle handle (13), it must be clockwise or Rotating in a specific direction counterclockwise can make the bottom end of the L-shaped card slot (131) out of the bump (121); thus, the user often turns the wrong square, and the needle handle (13) cannot be smoothly The needle socket (12) is taken down. 2. In addition, the joint surface (15) of the needle handle (13) and the needle socket (12) is a flat surface, and since the joint surface (15) must be tight, otherwise the injection is performed. The liquid will leak out, but, as shown in the second figure (B), when the needle handle (13) is rotated away from the bottom end of the L-shaped card slot (131), the push-pull rod is ready to be taken down. (14) The needle handle (13) must be pulled down forcefully in order to be smoothly recovered. Therefore, it is not very convenient to use. The foregoing L蜇 card slot embodiment is US Patent ΝΟ·5,273,543. In fact, the use of L-shaped card slots to locate the needle handle before the numerous cases, such as: 5,533,970, ... and many other previous cases; and the use of threaded structure to fix the needle handle before the case is also quite a lot, such as 4,944,723; 4,978,340; 171,300; 4,947,863; 4,986,813.... and other US patent cases. Furthermore, the structure of the needle handle is clamped or pressed, as shown in: Taiwan Announcement 492328, 356013, 359621, 463639···· and other patents, and The United States 5,242,400; 4,747,830; 5,098,390; 5,370,619; 4,911,693•...· and many other previous cases. It is true that each case has its own characteristics and appeals, but it can also be found in the previous case that some needle handles are tightly combined with the syringes, but It is not easy to recycle, and it is easy to recycle, but the combination is not tight enough, and the injection solution is easy to leak out. Therefore, there are still many room for improvement in the safe injection syringe. 1250033 [Summary of the Invention] The present invention is the present invention. The main purpose of the invention is to provide a safe injection and a combination of the needle handle, and the convenience of the present invention, and the effect of the push slope principle and the degree of a closeness. when When the handle is combined with the needle socket, the σ guiding groove is opened by the two ends of the ^ type or the V type, and the other purpose of the invention is that the w-shaped or V-shaped guiding groove is used again to provide a rotation in either direction. The needle handle can be quickly pushed down to achieve the effect of using the one-time and labor-saving effect. To achieve the above purpose, the technical means adopted by the invention is that at least one inner wall of the needle socket of the front end of the syringe body is provided The above-mentioned small convex body, the circumference of the needle handle of the needle set is matched with the inner wall surface of the needle socket, and a guiding groove is provided. The two ends of the guiding groove are open on the peripheral surface of the needle handle, and are opened by two The height portion is inclined downward to the lower portion of the center to form a positioning portion; thereby, the needle handle can be introduced into the small convex body by any opening of the guiding groove, and the small convex body can be rotated at an angle to position the small convex body at the lowest position of the guiding groove. And forcing the needle handle to press from the bottom to the inner wall surface of the needle socket; and when the needle handle is rotated by the push-pull rod to rotate in either direction, counterclockwise, the guide groove can be slid along the small convex body, forcing the needle The handle is pushed down and separated from one of the openings of the guiding groove The small convex body recovers the needle group in the cylindrical body. Progressively, the inner wall surface of the needle socket at the front end of the needle body is a conical shape with a narrow width and a wide width, and the circumference of the needle handle of the needle group is also set to a circular shape with a narrow upper and a lower width, so that the joint surface is pushed and pulled. state. Thereby, the needle handle becomes more and more tight when it is positioned from the bottom to the top, and has the convenience of labor saving and easy detachment when pulling back. 1250033 [Embodiment] First, referring to the third figure, an embodiment of the present invention includes a syringe body (2) having a hollow cylindrical body (21) and a needle socket (22) having a front end portion. Wherein, the inner wall surface of the needle socket (22) is provided with at least one small convex body (23), which is a figure of two symmetrical small bumps, which is a preferred embodiment; a push-pull rod (3) having a rod-shaped body (31) and a piston (32) provided at the front end, and an insert body (33) protruding from a front end surface of the piston (33), the insert body (33) having a conical shape and at least one side being provided as a flat surface (331) The needle set (4) has a hollow needle handle (41) and a needle tube (42) disposed at the front end of the needle handle. The needle tube (42) can be integrally formed with the needle handle (41), or As shown in the four figures, the two independent structures are then assembled into a needle group (4), but this is a conventional technique and will not be described. In addition, as shown in the fourth figure, a peripheral ring of the needle handle (41) can be provided with a rubber ring (45) as needed. Referring to the third figure and in conjunction with the fifth and sixth figures, the inner wall surface of the needle socket (22) of the present invention is provided with two small convex bodies (23), and the needle handle (41) is opposite to the small convex body. (23) A guiding groove (44) is provided, the guiding groove (44) is open at two ends (441) on the peripheral surface of the needle handle (41), and is raised from the height of the two openings (441) A positioning portion (442) is formed by tilting down to a central low. The guiding groove (44) is a vy-shaped body as shown in the seventh figure (A), and may also be a V-shaped body as shown in the seventh figure, and the common point is the high point at both ends. A positioning portion (442) is formed by tilting the center low point for the opening (441). As shown in the eighth drawing, the display needle handle (41) is assembled in a sectional view of the inner wall surface of the needle socket (22), and the needle handle (41) can be opened by any opening at both ends of the guiding groove (41). ) introducing a small convex body (23) from the bottom to the top, and rotating the angle so that the small convex body (23) is located at the lowest position of the guiding groove (44) (442), so that the needle handle (41) is moved from the bottom to the bottom Pressing on the inner wall surface of the needle socket (22), and in a preferred embodiment, the -8-Ϊ250033 needle socket (22) and the needle handle (41) are narrow and wide conical, so that the needle handle (41) and the inner wall surface of the needle socket (22) exhibit a push-and-slope plastic state, which facilitates the convenience of assembly and the tightness of the joint surface. Fig. 9 is a cross-sectional view showing the state of use of the present invention at the time of injection, and the injection liquid inside the cylindrical body (21) is caused to flow out from the needle tube (42) by pushing by the push-pull rod (3). The tenth drawing is a cross-sectional view of the injection, the push-pull rod (3) is extended into the cylindrical body (21), and the insert body (33) is inserted into the groove (43) of the bottom edge of the needle handle (41) due to the embedding Both the body (33) and the recessed groove (43) have a conical shape, and at least one side is provided with flat faces (331) and (431), so when they are inserted into the combination, they are entangled with each other, as shown in FIG. An enlarged cross-sectional view is shown. Therefore, whether the push-pull rod (3) rotates clockwise or counterclockwise as shown in the twelfth (A) or the twelve (B), the needle handle (41) can be rotated in the needle socket (22). And the guiding groove (44) is slid along the small convex body (23) by the positioning portion (442) when rotating, and presents a downward thrust, forcing the needle handle (41) to be pushed down, and by the guiding groove (44) The right or left opening (441) is separated from the small projection (23), and the needle set (4) is smoothly recovered inside the cylindrical body (21) as shown in Fig. 13. In addition, as shown in FIG. 14, the present invention can further form a top ring surface (221) at the front end of the needle socket (22), and between the inner edge of the annular surface (221) and the needle handle (41). There is a spring (24), when the needle handle (41) moves downward, the elastic handle of the spring (24) helps the needle handle (41) to be down, so that it can be more smoothly recovered in the cylindrical body (21). internal. That is, the present invention utilizes the characteristics of the opening (441) at both ends of the vy-type or V-shaped guiding groove (44), and when the user recycles the needle, the push-pull rod (3) can be rotated in any direction to make the needle handle (41). ) Automatic push-down; further, with the design of push-pull slope, -9- 1250033 makes the needle handle easy to assemble, and it is extremely smooth when exiting downwards. Therefore, it is user-friendly and convenient. Improved efficacy. In summary, the technical means disclosed in the present invention have the invention patent requirements such as "new dependence, "progressiveness" and "available for industrial use", and pray for the patent to encourage the invention. German sense. However, the drawings and descriptions disclosed above are only preferred embodiments of the present invention, and those skilled in the art will be able to include modifications or equivalent changes in the spirit of the present invention.
-10- 1250033 【圖式簡單說明】 第一圖係習用注射針筒之分解立體圖。 第二圖（A)係第一圖組合後之部分剖示圖。 第二圖（B)係第二圖（A)之推拉桿回收示意圖。 第三圖係本發明較佳實施例之分解立體圖。 第四圖係本發明另一實施例之分解立體圖。 第五圖係本發明之針柄結構示意圖。 第六圖係第五圖之俯視圖。 第七圖（A)係導引槽一可行實施例圖。 第七圖（B)係導引槽另一可行實施例圖。 第八圖係針柄組裝定位在針頭插座之剖示圖。 第九圖係本發明使用狀態參考圖。 第十圖係第九圖注射完畢時之剖示圖。 第十一圖係第十圖中11-11斷面剖示圖。 第十二圖（A)係推拉桿順時針轉動使用針柄下推之示 意圖。 第十二圖（B)係推拉桿逆時針轉動使針柄下推之示意圖。 第十三圖係針頭組回收至筒狀本體内部之示意圖。 第十四圖係本發明針頭插座另一可行實施例圖。 【主要元件符號說明】 (2)針筒體 (21) 筒狀本體 (22) 針頭插座 (221)環面 1250033 (23) 小凸體 (24) 彈簧 (3) 推拉桿 (31) 桿狀本體 (32) 活塞 (33) 嵌入體 (331)平直面 (4) 針頭組 (41) 針柄 (42) 針管 (43) 嵌槽 (431)平直面 (44) 導引槽 (441) 開口 (442) 定位部 (45) 膠圈-10- 1250033 [Simple description of the drawing] The first figure is an exploded perspective view of the conventional injection syringe. The second figure (A) is a partial cross-sectional view after the combination of the first figures. The second figure (B) is a schematic diagram of the push-pull rod recovery of the second figure (A). The third drawing is an exploded perspective view of a preferred embodiment of the present invention. The fourth figure is an exploded perspective view of another embodiment of the present invention. The fifth figure is a schematic view of the structure of the needle handle of the present invention. The sixth figure is a top view of the fifth figure. Figure 7 (A) is a diagram of a possible embodiment of the guiding groove. Figure 7 (B) is a diagram of another possible embodiment of the guiding groove. The eighth figure is a cross-sectional view of the needle handle assembly positioned at the needle socket. The ninth diagram is a reference diagram of the state of use of the present invention. The tenth figure is a cross-sectional view of the ninth figure at the time of completion of the injection. The eleventh figure is a sectional view of section 11-11 in the tenth figure. Figure 12 (A) shows the push-pull rod turning clockwise using the needle handle to push down. Figure 12 (B) is a schematic view of the push-pull rod rotating counterclockwise to push the needle handle down. The thirteenth figure is a schematic view of the recovery of the needle set to the inside of the cylindrical body. Fig. 14 is a view showing another possible embodiment of the needle socket of the present invention. [Main component symbol description] (2) Syringe body (21) Cylindrical body (22) Needle socket (221) Torus 1250033 (23) Small convex body (24) Spring (3) Push-pull rod (31) Rod-shaped body (32) Piston (33) Insert (331) Straight face (4) Needle set (41) Needle shank (42) Needle (43) Insert (431) Straight face (44) Guide groove (441) Opening (442 Positioning part (45) apron