WO2006024232A1 - Self-destructing syringe - Google Patents

Self-destructing syringe Download PDF

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Publication number
WO2006024232A1
WO2006024232A1 PCT/CN2005/001376 CN2005001376W WO2006024232A1 WO 2006024232 A1 WO2006024232 A1 WO 2006024232A1 CN 2005001376 W CN2005001376 W CN 2005001376W WO 2006024232 A1 WO2006024232 A1 WO 2006024232A1
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WO
WIPO (PCT)
Prior art keywords
self
push rod
destructing syringe
syringe according
piston
Prior art date
Application number
PCT/CN2005/001376
Other languages
French (fr)
Chinese (zh)
Inventor
Chaoxiong Chen
Original Assignee
Chaoxiong Chen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chaoxiong Chen filed Critical Chaoxiong Chen
Publication of WO2006024232A1 publication Critical patent/WO2006024232A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston

Definitions

  • This invention relates to syringes, and more particularly to self-destructing syringes that can only be used once.
  • the syringes currently used are collectively referred to as "one-time use", but they do not show their "one-off” effect in nature. Users can disassemble them before and after use. It is difficult to identify the essential difference between before and after use, so that many criminals often disassemble and use the used syringe and reuse it, which affects the use effect of disposable syringes. Therefore, a self-destructing syringe has been invented, and after use, the needle tube and the push rod can achieve the self-locking effect, and the phenomenon that the syringe is reused is eliminated.
  • the object of the present invention is to provide a self-destructible syringe which can be completely self-destructed, which can automatically self-deactivate the syringe and the push rod after one use, and can not be reused repeatedly, and the pumping measurement is accurate.
  • a self-destructing syringe comprising a needle casing and a matching push rod, the top end of the push rod being coupled with a piston, wherein: the end of the needle tube jacket is provided with an i n unit The rear part of the push rod is provided with at least two to four self-locking rods that can be locked by the needle tube jacket boss; the piston is a hierarchical inner suspension identical structure.
  • a positioning safety tip connected to the rear portion of the push rod, the other end of the positioning safety tip abutting against the end of the needle tube outer sleeve, facilitating positioning of the product during packaging, preventing the push rod from moving forward and scraping the syringe, and also enabling the consumer And the user can easily identify whether it has been used.
  • the inside of the piston forms an inner floating zone, the mouth of the jaw is connected to the pusher, and the edge of the mouth is chamfered.
  • the needle boss end boss is provided with an inner cross rail.
  • the self-locking rods on the push rod are respectively composed of two self-locking rods forming an angle with the plane of the wall surface of the push rod rod and two ribs perpendicular to the central axis of the push rod; a separating strip and a rib are arranged on the ribs
  • the joint of the end of the separating belt and the push rod is a cylindrical connecting strip, and the connecting strip is arranged at the shaft core of the push rod to form a breakpoint connection with the rib.
  • the invention adopts a special piston with a graded inner suspension type.
  • the position of the piston before the syringe is in the bottom end of the needle jacket is the same as that of the ordinary disposable syringe used now, and does not hinder the accurate measurement when the push rod is pumped.
  • the inner suspension of the piston allows the push rod to be advanced to reach the top of the piston, and the self-locking rod on the upper part of the push rod can completely enter the needle casing, against the boss at the end, and cannot be pumped back.
  • to achieve the purpose of "self-destruction" can not be used again, is a perfect self-destructive syringe.
  • Figure 1 is a schematic view of the structure of the present invention.
  • Figure 2 is a diagram showing the state of use of the present invention (before injection).
  • Figure 3 is a diagram showing the state of use of the present invention (after injection).
  • Figure 4 is a schematic view showing the structure of the piston of the present invention.
  • Figure 5 is a front elevational view of the boss of the present invention.
  • Figure 6 is a cross-sectional view of Figure 5.
  • Figure 7 is a front elevational view of the handle of the present invention.
  • Fig. 8 is a schematic structural view of another embodiment of the present invention.
  • Figure 9 is a side view of Figure 8.
  • Fig. 10 is a distribution diagram of the stress point of Fig. 9.
  • Figure 1 1 is a distribution map of another force point (four self-locking rods).
  • Figure 12 is a schematic view showing the structure of still another embodiment of the present invention.
  • the present invention comprises a hollow straight cylindrical needle casing 1 and a push rod matched with the needle casing 1
  • the needle casing 1 includes a hollow cylinder and a boss 4 at the end. As shown in Figs. 5 and 6, the boss 4 is inwardly convex and is provided with an inner cross rail 41.
  • the push rod 2 has a cross shape and is engaged with and slides along the inner cross-shaped guide rail 41 of the boss 4.
  • Elastic pressure piece In this embodiment, a groove that is bent outward by about 30° is formed on the rear portion of the cross-shaped rod wall of the push rod 2, and the plane of the outer wall of the slotted groove and the plane of the cross-shaped rod wall of the push rod 2 are formed.
  • the rod wall outside the slot is elastic, thereby forming a lock lever 8.
  • the upper part of the push rod 2 is provided with a circular stopper 6 and is integrally connected with the self-locking rod 8.
  • the self-locking rod 8 on the push rod 2 is opposite to the bottom of the cross-shaped rail 41 in the top boss 4 of the hollow cylinder after the injection is completed.
  • the shape of the stopper 6 is equal to the diameter of the inner wall of the boss 4 of the hollow cylinder, which can completely cover the hollow cylinder, prevent residual liquid leakage, and can more effectively function as a sealing self-locking, preventing movement and self-locking. Rod and effectively avoid reuse.
  • the top of the push rod 2 is connected with a piston 3 (as shown in Fig. 4).
  • the piston 3 is made of a rubber material and has a suspended inner structure, and the outer wall is provided with a projection 31 for sealing.
  • the piston 3 is hollow and has a conical shape at the top to match the shape of the top end of the needle casing 1.
  • the piston 3 is engaged with the top end of the push rod 2 through the opening 32, and a space is left at the top end of the push rod 2 and the top of the piston 3 to form an inner floating area 33.
  • the opening 32 is provided in a secondary structure, and the edge portion of the snap is provided as a chamfer 34, so that the push rod 2 can be easily advanced further into the inside of the piston 3 after the injection is completed.
  • An elliptical handle 5 (shown in Figure 7) is provided at the end of the push rod 2 to facilitate aspiration and injection operations, as well as to facilitate the positioning of the safety tip 7 .
  • the positioning safety pin 7 is connected to the handle 5 through a break point, and the other end is abutted against the table 4 at the end of the needle casing 1.
  • the positioning safety tip 7 is positioned to facilitate positioning of the product when packaging, and the relative position of the push rod 2 and the needle casing 1 is fixed, preventing the push rod 2 from moving forward and scraping the syringe, and when used, The positioning safety tip 7 is disengaged, so that the consumer and the user can easily recognize whether it has been used.
  • the position of the piston 3 has already reached the bottom end of the needle casing I (as shown in Figure 2).
  • the positioning safety tip 7 is disengaged, the push rod 2 is pulled backward, and the piston 3 is driven backward, and the liquid is sucked into the needle tube from the needle.
  • the push rod 2 is pushed forward, and the liquid is ejected from the needle.
  • the top end of the piston 3 has already pressed against the front end of the needle tube, and the push rod 2 continues to push forward, due to the inner hanging area of the piston 3 And the stepped opening structure, and the chamfering of the engaging edge thereof, enables the push rod 2 to further enter the inside of the piston 3.
  • the four self-locking rods 8 at the rear enter the needle at the same time. Due to the elasticity of the plastic, the self-locking lever 8 is reset from the inner cross-shaped rail 41 of the boss 4, and the self-locking lever 8 is reset, forming an angle with the plane of the cross-shaped rod wall of the push rod 2, thereby making the self-locking
  • the top end of the rod 8 is no longer aligned with the inner cross-shaped rail 41 of the boss 4, but is in opposition to the bottom thereof, so that the push rod 2 is self-locking, as shown in Fig. 3, achieving the real effect of one-time use.
  • the self-locking rods 8 on the push rod 2 of the present invention can be designed as two to four, and can be incremented or decremented according to product specifications.
  • two self-locking bars 8 and two ribs 9 are distributed on the wall of the rear portion of the push rod 2, and the self-locking is performed.
  • the rod 8 forms a certain angle with the plane of the rod wall, and is slotted with the rod wall to make the rod wall outside the slot have elasticity;
  • the rib 9 is provided with a separating belt, so that a rib 9 is divided into upper and lower parts.
  • the connection between the end of the rib 9 and the push rod 2 is a cylindrical connecting strip 10, which is arranged at the axial core of the push rod 2, and forms a breakpoint connection with the two ribs 9.
  • the operation mode of the push rod 2 is the same as that of the other embodiments: After the injection is completed, the lock lever 8 is in contact with the needle boss 4, and the push rod 2 cannot be sucked back. When the push rod 2 is forcibly pulled back by external force The top end of the self-locking rod 8 and the rib 9 are respectively in contact with the boss 4, and the cylindrical connecting strip 10 is also subjected to force at the same time (see Figure 10 for the force diagram).
  • the connecting strip 10 is subjected to The force is broken, the push rod 2 is divided into upper and lower parts, the upper handle 5 is pulled out, the lower part is retained in the needle tube outer casing 1, and the piston 3 and the needle tube top tube are automatically adhered and broken; 5 the push rod 2 cannot be pumped back, The syringe is permanently scrapped to prevent repeated use by others, achieving a complete self-destructive effect.
  • FIG. 12 still another embodiment of the present invention is similar to the embodiment of FIG. 8, and the difference is that the rib 9 is designed to have an arc-shaped inverted R angle, the end of the rib 9 and the push rod 2
  • the joint is a cylindrical splicing strip 10 which is arranged at the shaft core of the push rod 2 to form a breakpoint connection with the rib 2.
  • the present invention incorporates special manufacturing measures in conjunction with all of the functions and performance and process requirements of the syringe, i.e., the hollow can 1 and the boss 5 are formed by ultrasonic bonding.

Abstract

A self-destructing syringe comprises a barrel and a matched plunger. The top end of the plunger is connected to a piston. A flange is provided on the end of the barrel. At least 2-4 self-locked rods and two ribs are provided on the rear of the plunger, and the self-locked rods can be locked by the flange of the barrel. The piston has a graded and inner hanging structure.

Description

自毁型注射器 本发明所属技术领域  Self-destructing syringe
本发明涉及注射器， 特别是一种只能一次性使用的自毁型注射器。 在本发明之前的现有技术  This invention relates to syringes, and more particularly to self-destructing syringes that can only be used once. Prior art prior to the present invention
现时所使用的注射器， 全部统称为 "一次性使用" ， 但其实质上并未显不出其 "一 次性" 的使用效果， 使用者在使用前和使用后都可随意拆装， 消费者较难识别使用前和 使用后的实质区别， 令众多不法分子常常将使用后的注射器拆装后重复使用， 影响一次 性注射器的使用效果。 因此有人发明了自毁型注射器， 在使用后， 针管和推杆能达到自 锁的效果， 杜绝了注射器被重复使用的现象。 但是 g前的自毁型注射器在未使用前， 其 推杆顶端的活塞与针管头部悬空一段距离， 造成刻度计量无法确认的主要矛盾， 也是使 用中的一大缺陷。 发明目的  The syringes currently used are collectively referred to as "one-time use", but they do not show their "one-off" effect in nature. Users can disassemble them before and after use. It is difficult to identify the essential difference between before and after use, so that many criminals often disassemble and use the used syringe and reuse it, which affects the use effect of disposable syringes. Therefore, a self-destructing syringe has been invented, and after use, the needle tube and the push rod can achieve the self-locking effect, and the phenomenon that the syringe is reused is eliminated. However, before the self-destructive syringe in front of g, the piston at the top of the push rod and the head of the needle are suspended at a distance, which causes the main contradiction that the scale measurement cannot be confirmed, and is also a major defect in use. Purpose of the invention
本发明的目的在于提供一种能完全式的自毁型注射器， 其一次使用后即可令针筒与 推杆自锁而自动报废且无法重复再用， 同时抽送计量精确。 本发明采用的技术方案  SUMMARY OF THE INVENTION The object of the present invention is to provide a self-destructible syringe which can be completely self-destructed, which can automatically self-deactivate the syringe and the push rod after one use, and can not be reused repeatedly, and the pumping measurement is accurate. Technical solution adopted by the invention
本发明的目的是这样实现的： 一种自毁型注射器， 包括针管外套和与之相配的推 杆， 推杆的顶端接有活塞， 其特征在于： 所述针管外套末端设有 ini台， 推杆后部分布有 至少二〜四根可被针管外套凸台锁定的自锁杆； 所述活塞为分级内悬仝式结构。 The object of the present invention is achieved as follows: a self-destructing syringe comprising a needle casing and a matching push rod, the top end of the push rod being coupled with a piston, wherein: the end of the needle tube jacket is provided with an i n unit The rear part of the push rod is provided with at least two to four self-locking rods that can be locked by the needle tube jacket boss; the piston is a hierarchical inner suspension identical structure.
所述推杆后部连接的一定位安全梢， 该定位安全梢的另一端与针管外套的末端相抵， 便于产品包装时的定位， 防止推杆向前移动而使注射器报废， 也可使消费者和使用者便 于辨认是否曾使用过。  a positioning safety tip connected to the rear portion of the push rod, the other end of the positioning safety tip abutting against the end of the needle tube outer sleeve, facilitating positioning of the product during packaging, preventing the push rod from moving forward and scraping the syringe, and also enabling the consumer And the user can easily identify whether it has been used.
所述活塞内部形成内悬空区， 其与推杆卡接的幵口为二级结构， 幵口的边缘部分设 置为倒角。  The inside of the piston forms an inner floating zone, the mouth of the jaw is connected to the pusher, and the edge of the mouth is chamfered.
所述针管外套末端凸台设有内十字形导轨。 所述的推杆上的自锁杆分别由二根与推杆杆壁平面形成角度的自锁杆和二条与推杆 中轴垂直的筋条组成； 筋条上设有一条分离带， 筋条的分离带末端与推杆的连接处为一 圆柱状连接条， 该连接条设于推杆中轴轴芯处， 与筋条形成断点连接方式。 The needle boss end boss is provided with an inner cross rail. The self-locking rods on the push rod are respectively composed of two self-locking rods forming an angle with the plane of the wall surface of the push rod rod and two ribs perpendicular to the central axis of the push rod; a separating strip and a rib are arranged on the ribs The joint of the end of the separating belt and the push rod is a cylindrical connecting strip, and the connecting strip is arranged at the shaft core of the push rod to form a breakpoint connection with the rib.
本发明采用分级内悬空式的特殊活塞， 注射器在未使用前活塞的位置状态就在针 外 套的最底端， 同现在所使用的普通一次性注射器效果相同， 不妨碍推杆抽送时的精确计 量， 当注射器注射完毕， 活塞的内悬空区可使推杆能够被继续前进到达活塞内顶部， 而 推杆上部的自锁杆就能完全进入针管外套， 抵住其末端的凸台， 不能回抽， 达到 "自 毁" 的目的， 无法再次使用， 是一种完善的自毁型注射器。 附图说明  The invention adopts a special piston with a graded inner suspension type. The position of the piston before the syringe is in the bottom end of the needle jacket is the same as that of the ordinary disposable syringe used now, and does not hinder the accurate measurement when the push rod is pumped. When the syringe is injected, the inner suspension of the piston allows the push rod to be advanced to reach the top of the piston, and the self-locking rod on the upper part of the push rod can completely enter the needle casing, against the boss at the end, and cannot be pumped back. , to achieve the purpose of "self-destruction", can not be used again, is a perfect self-destructive syringe. DRAWINGS
图 1是本发明的结构示意图。  Figure 1 is a schematic view of the structure of the present invention.
图 2是本发明的使用状态图 （未注射前） 。  Figure 2 is a diagram showing the state of use of the present invention (before injection).
图 3是本发明的使用状态图 （注射后） 。  Figure 3 is a diagram showing the state of use of the present invention (after injection).
图 4是本发明活塞的结构示意图。  Figure 4 is a schematic view showing the structure of the piston of the present invention.
图 5是本发明凸台的主视图。  Figure 5 is a front elevational view of the boss of the present invention.
图 6是图 5的剖面图。  Figure 6 is a cross-sectional view of Figure 5.
图 7是本发明手柄的主视图。  Figure 7 is a front elevational view of the handle of the present invention.
图 8是本发明另一实施方式的结构示意图。  Fig. 8 is a schematic structural view of another embodiment of the present invention.
图 9是图 8的侧视图。  Figure 9 is a side view of Figure 8.
图 10是图 9的受力点的分布图。  Fig. 10 is a distribution diagram of the stress point of Fig. 9.
图 1 1是另一受力点的分布图 （四根自锁杆） 。  Figure 1 1 is a distribution map of another force point (four self-locking rods).
图 12是本发明再一实施方式的结构示意图。 实施例  Figure 12 is a schematic view showing the structure of still another embodiment of the present invention. Example
如图 1 所示， 本发明包括一中空直筒形的针管外套 1， 与针管外套 1 相配的推杆 As shown in Fig. 1, the present invention comprises a hollow straight cylindrical needle casing 1 and a push rod matched with the needle casing 1
2， 推杆 2的顶端接有一活塞 3。 针管外套 1 包括中空筒和末端的凸台 4两部分。 如图 5、 6所示， 凸台 4向内凸起， 并设有内十字形导轨 41。 推杆 2为十字形， 卡接于凸台 4 的内十字形导轨 41并沿其滑动。 推杆 2后部设有 2~4根自锁杆 8， 是由推杆 2延伸而成 的弹性压件。 在本实施例中， 在推杆 2十字形杆壁的后部上开设有向外弯曲约 30° 的开 槽， 开槽外侧杆壁所处平面与推杆 2十字形杆壁所处平面形成一定角度， 如以十字形杆 壁平面为起点逆时针转 30° -45 ° ， 使开槽外侧的杆壁具有弹性， 从而形成 £|锁杆 8。 推 杆 2上部设有一圆形的挡块 6， 和自锁杆 8—体连成， 推杆 2上的自锁杆 8在注射完毕后 与中空筒顶部凸台 4内十字形轨道 41底部相顶触的同时， 挡块 6的形状与中空筒顶部凸 台 4 内壁直径相等， 可完全盖住中空筒， 防止残余的液体泄漏， 并能更有效的起到密封 自锁作用， 防止移动自锁杆和有效避免重复使用。 2. A plunger 3 is attached to the top end of the push rod 2. The needle casing 1 includes a hollow cylinder and a boss 4 at the end. As shown in Figs. 5 and 6, the boss 4 is inwardly convex and is provided with an inner cross rail 41. The push rod 2 has a cross shape and is engaged with and slides along the inner cross-shaped guide rail 41 of the boss 4. There are 2~4 self-locking rods 8 at the rear of the push rod 2, which are extended by the push rod 2. Elastic pressure piece. In this embodiment, a groove that is bent outward by about 30° is formed on the rear portion of the cross-shaped rod wall of the push rod 2, and the plane of the outer wall of the slotted groove and the plane of the cross-shaped rod wall of the push rod 2 are formed. At a certain angle, if the counter-clockwise rotation is 30° -45 ° from the plane of the cruciform rod wall, the rod wall outside the slot is elastic, thereby forming a lock lever 8. The upper part of the push rod 2 is provided with a circular stopper 6 and is integrally connected with the self-locking rod 8. The self-locking rod 8 on the push rod 2 is opposite to the bottom of the cross-shaped rail 41 in the top boss 4 of the hollow cylinder after the injection is completed. At the same time of the top contact, the shape of the stopper 6 is equal to the diameter of the inner wall of the boss 4 of the hollow cylinder, which can completely cover the hollow cylinder, prevent residual liquid leakage, and can more effectively function as a sealing self-locking, preventing movement and self-locking. Rod and effectively avoid reuse.
推杆 2顶部接有活塞 3 (如图 4所示） ， 活塞 3由橡胶材料制成， 为分级内悬空式 结构， 外壁设有起密封作用的凸起 31。 活塞 3中空， 顶部为圆锥形， 以配合针管外套 I 顶端的形状， 活塞 3通过开口 32卡接于推杆 2顶端， 推杆 2顶端与活塞 3内顶部留有一 定空间， 形成内悬空区 33。 开口 32设置为二级结构， 卡接的边缘部分设置为倒角 34， 使推杆 2在注射完毕后能方便的被进一步推进到活塞 3内部。 在推杆 2末端设有椭圆形 的手柄 5 (如图 7所示） ， 以方便进行吸液和注射操作， 以及方便设置定位安全梢 7。 该 定位安全梢.7—端通过断点连接于手柄 5上， 其另一端与针管外套 1 末端的 台 4相 抵。 在未使用时， 该定位安全梢 7起定位作用， 便于产品包装时的定位， 固定推杆 2和 针管外套 1 的相对位置， 防止推杆 2向前移动而使注射器报废， 在使用时则将定位安全 梢 7拨断， 使消费者和使用者便于辨认是否曾使用过。  The top of the push rod 2 is connected with a piston 3 (as shown in Fig. 4). The piston 3 is made of a rubber material and has a suspended inner structure, and the outer wall is provided with a projection 31 for sealing. The piston 3 is hollow and has a conical shape at the top to match the shape of the top end of the needle casing 1. The piston 3 is engaged with the top end of the push rod 2 through the opening 32, and a space is left at the top end of the push rod 2 and the top of the piston 3 to form an inner floating area 33. . The opening 32 is provided in a secondary structure, and the edge portion of the snap is provided as a chamfer 34, so that the push rod 2 can be easily advanced further into the inside of the piston 3 after the injection is completed. An elliptical handle 5 (shown in Figure 7) is provided at the end of the push rod 2 to facilitate aspiration and injection operations, as well as to facilitate the positioning of the safety tip 7 . The positioning safety pin 7 is connected to the handle 5 through a break point, and the other end is abutted against the table 4 at the end of the needle casing 1. When not in use, the positioning safety tip 7 is positioned to facilitate positioning of the product when packaging, and the relative position of the push rod 2 and the needle casing 1 is fixed, preventing the push rod 2 from moving forward and scraping the syringe, and when used, The positioning safety tip 7 is disengaged, so that the consumer and the user can easily recognize whether it has been used.
注射器在未使用前， 活塞 3 的位置状态就己经在针管外套 I 的最底端 （如图 2所 示） 。 使用时， 将定位安全梢 7拨开， 推杆 2向后拉， 带动活塞 3—起向后， 液体即从 针头被吸入针管内。 当需要注射时， 将推杆 2 向前推动， 液体从针头射出， 当注射完毕 时， 活塞 3顶端已经抵住针管的前端， 此时将推杆 2继续推前， 由于活塞 3的内悬空区 以及分级的开口结构， 而且其卡接边缘的倒角， 使推杆 2能够进一步进入到活塞 3 内 部， 推杆 2完全进入针管后， 后部的四根自锁杆 8同时进入针 ^内， 由于塑料弹性的作 用， 自锁杆 8在脱离凸台 4的内十字形轨道 41的限制后， 自锁杆 8复位， 与推杆 2十字 形杆壁所处平面形成一定角度， 从而使自锁杆 8的顶端不再对准凸台 4的内十字形轨道 41， 而是与其底部相抵触， 使推杆 2达到自锁， 如图 3所示， 实现一次性使用的真正效 果。 本发明推杆 2上的自锁杆 8可以设计为二根〜四根， 并可视产品规格作相应递增或 者递减。 Before the syringe is used, the position of the piston 3 has already reached the bottom end of the needle casing I (as shown in Figure 2). In use, the positioning safety tip 7 is disengaged, the push rod 2 is pulled backward, and the piston 3 is driven backward, and the liquid is sucked into the needle tube from the needle. When the injection is needed, the push rod 2 is pushed forward, and the liquid is ejected from the needle. When the injection is completed, the top end of the piston 3 has already pressed against the front end of the needle tube, and the push rod 2 continues to push forward, due to the inner hanging area of the piston 3 And the stepped opening structure, and the chamfering of the engaging edge thereof, enables the push rod 2 to further enter the inside of the piston 3. After the push rod 2 completely enters the needle tube, the four self-locking rods 8 at the rear enter the needle at the same time. Due to the elasticity of the plastic, the self-locking lever 8 is reset from the inner cross-shaped rail 41 of the boss 4, and the self-locking lever 8 is reset, forming an angle with the plane of the cross-shaped rod wall of the push rod 2, thereby making the self-locking The top end of the rod 8 is no longer aligned with the inner cross-shaped rail 41 of the boss 4, but is in opposition to the bottom thereof, so that the push rod 2 is self-locking, as shown in Fig. 3, achieving the real effect of one-time use. The self-locking rods 8 on the push rod 2 of the present invention can be designed as two to four, and can be incremented or decremented according to product specifications.
如图 8、 图 9、 图 10所示， 本发明的另一种实施方式， 推杆 2后部的杆壁上分布有 二根自锁杆 8和二根筋条 9， 所述的自锁杆 8与杆壁平面形成一定角度， 且与杆壁开槽， 使开槽外侧的杆壁具有弹性； 所述的筋条 9上设有一分离带， 使一条筋条 9被分成上下 两部分， 筋条 9末端与推杆 2的连接处为一圆柱状连接条 10， 该连接条 10设于推杆 2中 轴轴芯处， 与两根筋条 9形成断点连接方式。  As shown in FIG. 8, FIG. 9, and FIG. 10, in another embodiment of the present invention, two self-locking bars 8 and two ribs 9 are distributed on the wall of the rear portion of the push rod 2, and the self-locking is performed. The rod 8 forms a certain angle with the plane of the rod wall, and is slotted with the rod wall to make the rod wall outside the slot have elasticity; the rib 9 is provided with a separating belt, so that a rib 9 is divided into upper and lower parts. The connection between the end of the rib 9 and the push rod 2 is a cylindrical connecting strip 10, which is arranged at the axial core of the push rod 2, and forms a breakpoint connection with the two ribs 9.
使用时， 推杆 2的操作方式与其余实施方式相同： 在注射完毕后， Θ锁杆 8与针管 凸台 4相顶触， 推杆 2无法回抽， 当推杆 2被外力强行回抽时， 自锁杆 8和筋条 9的上 部顶端分别与凸台 4相顶触， 圆柱状连接条 10也同时受力 （受力图见图 10 ) ， 当受力达 到极限时， 连接条 10受力断裂， 将推杆 2分成上、 下两部分， 上部手柄 5被拉出， 下部 保留在针管外套 1 内， 且活塞 3与针管顶管自动粘连， 断裂； 5的推杆 2无法回抽， 使注 射器永久报废， 防止他人重复再用， 实现完全式的自毁效果。  When in use, the operation mode of the push rod 2 is the same as that of the other embodiments: After the injection is completed, the lock lever 8 is in contact with the needle boss 4, and the push rod 2 cannot be sucked back. When the push rod 2 is forcibly pulled back by external force The top end of the self-locking rod 8 and the rib 9 are respectively in contact with the boss 4, and the cylindrical connecting strip 10 is also subjected to force at the same time (see Figure 10 for the force diagram). When the force reaches the limit, the connecting strip 10 is subjected to The force is broken, the push rod 2 is divided into upper and lower parts, the upper handle 5 is pulled out, the lower part is retained in the needle tube outer casing 1, and the piston 3 and the needle tube top tube are automatically adhered and broken; 5 the push rod 2 cannot be pumped back, The syringe is permanently scrapped to prevent repeated use by others, achieving a complete self-destructive effect.
如图 1 1所示， 当自锁杆 8设计为四根时， 其连接条 10及四根 β锁杆 8的受力状态 见图。  As shown in Fig. 1, when the self-locking lever 8 is designed as four, the force state of the connecting bar 10 and the four β-locking bars 8 is shown in the figure.
如图 12所示， 本发明的再一实施方式与图 8的实施方式相类同， 其区别点是： 筋 条 9设计为带有圆弧形倒 R角， 筋条 9末端与推杆 2的连接处为一圆柱状迕接条 10， 该 连接条 10设于推杆 2中轴轴芯处， 与筋条 2形成断点连接方式。  As shown in FIG. 12, still another embodiment of the present invention is similar to the embodiment of FIG. 8, and the difference is that the rib 9 is designed to have an arc-shaped inverted R angle, the end of the rib 9 and the push rod 2 The joint is a cylindrical splicing strip 10 which is arranged at the shaft core of the push rod 2 to form a breakpoint connection with the rib 2.
本发明为配合注射器实施的所有功能和性能及工艺要求的精确度而加入了特殊的 制造措施， 即中空筒外套 1与凸台 5采用超声波接合的方式而形成于一休。  The present invention incorporates special manufacturing measures in conjunction with all of the functions and performance and process requirements of the syringe, i.e., the hollow can 1 and the boss 5 are formed by ultrasonic bonding.

Claims

权 利 要 求 Rights request
一种自毁型注射器， 包括针管外套 （1) 和与之相配的推杆 （2) ， 推杆 （2) 的顶 端接有活塞 （3) ， 其特征在于： 所述针管外套 （1) 末端设有凸台 （4) ， 推杆 (2) 后部分布有至少二〜四根可被针管外套凸台 （4) 锁定的自锁杆 （8) ； 所述 活塞 （3) 为分级内悬空式结构。  A self-destructing syringe comprising a needle casing (1) and a matching push rod (2), the top end of the push rod (2) being connected with a piston (3), characterized in that: the end of the needle casing (1) There is a boss (4), and the rear part of the push rod (2) is provided with at least two to four self-locking rods (8) which can be locked by the needle tube boss (4); the piston (3) is suspended in the hierarchy Structure.
2、 根据权利要求 1所述的自毁型注射器， 其特征在于： 所述推杆 （2) 后部连接的一 定位安全梢 （7) , 该定位安全梢 （7) 的另一端与针管外套 （1) 的末端相抵。 2. The self-destructing syringe according to claim 1, characterized in that: a positioning safety tip (7) connected to the rear of the push rod (2), the other end of the positioning safety tip (7) and the needle tube outer casing The end of (1) is offset.
3、 根据权利要求 1所述的自毁型注射器， 其特征在于： 所述活塞 （3) 内部形成内悬 空区 （33) ， 其与推杆 （2) 卡接的开口 （32) 为二级结构， 开口 （32) 的边缘部 分设置为倒角。 3. The self-destructing syringe according to claim 1, wherein: the piston (3) has an inner suspension region (33) formed therein, and the opening (32) that is engaged with the push rod (2) is a second stage. Structure, the edge portion of the opening (32) is set to chamfer.
4 根据权利要求 1所述的自毁型注射器， 其特征在于： 所述针管外套 （1) 末端 Λ台 4. The self-destructing syringe according to claim 1, wherein: the needle tube outer casing (1) end is collapsed
(4) 设有内十字形导轨 （41) 。 (4) With inner cross rail (41).
根据权利要求 1所述的自毁型注射器， 其特征在于： 所述的自锁杆 （8) 为由推杆 A self-destructing syringe according to claim 1, wherein: said self-locking lever (8) is a push rod
(2) 延伸而成的弹性压件。 (2) An extended elastic member.
6、 根据权利要求 5所述的自毁型注射器， 其特征在于： 所述的 S锁杆 （8) 所处平面 与推杆 （2) 杆壁平面形成角度。 6. Self-destructing syringe according to claim 5, characterized in that the plane of the S-locking lever (8) is at an angle to the plane of the wall of the push rod (2).
7 根据权利要求 1所述的自毁型注射器， 其特征在于： 所述的推杆 （2) 末端设冇椭 圆形的手柄 （5) 。  The self-destructing syringe according to claim 1, characterized in that: the end of the push rod (2) is provided with an elliptical handle (5).
根据权利要求 1所述的自毁型注射器， 其特征在于： 所述的针管外套 （1) 为中 直筒形结构。 ·  A self-destructing syringe according to claim 1, wherein: said needle casing (1) is a medium straight cylindrical structure. ·
9、 根据权利要求 1所述的自毁型注射器， 其特征在于： 所述的安全定位梢 （7) 与推 杆 （2) 后部的连接采用断点连接的方式。  9. The self-destructing syringe according to claim 1, wherein: the connection between the safety positioning tip (7) and the rear portion of the push rod (2) is a break point connection.
10， 根据权利要求 1所述的自毁型注射器， 其特征在于： 所述的推杆 （2) 上的自锁杆 分别由二根与推杆 （2) 杆壁平面形成角度的自锁杆 （8) 和二条与推杆 （2) 中轴 垂直的筋条 （9) 组成； 筋条 （9) 上设有一条分离带， 筋条 （9) 的分离带末端与 推杆 （2) 的连接处为一圆柱状连接条 （10) ， 该连接条 （10) 设于推杆 （2) 中 轴轴芯处， 与筋条 （9) 形成断点连接方式。  10. The self-destructing syringe according to claim 1, wherein: the self-locking levers on the push rods (2) are respectively separated by two self-locking rods which are angled with the plane of the pole wall of the push rod (2) (8) consisting of two ribs (9) perpendicular to the axis of the push rod (2); a detaching strip on the rib (9), the end of the strip of the rib (9) and the push rod (2) The connection is a cylindrical connecting strip (10), which is arranged at the shaft core of the push rod (2) and forms a breakpoint connection with the rib (9).
PCT/CN2005/001376 2004-09-03 2005-09-01 Self-destructing syringe WO2006024232A1 (en)

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CNU2004200836123U CN2726617Y (en) 2004-09-03 2004-09-03 Self-destruction type syringe
CN200420083612.3 2004-09-03

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102371014A (en) * 2010-08-20 2012-03-14 江苏康宝医疗器械有限公司 Self-destruction disposable syringe
CN104857626A (en) * 2014-02-25 2015-08-26 中国人民解放军军事医学科学院野战输血研究所 Deep part trauma hemostatic material leading-in device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000057A1 (en) * 1987-07-02 1989-01-12 Robert John Charles Foster Single fill and use syringe
CN2234276Y (en) * 1995-11-07 1996-09-04 陈建国 Self-destroying type disposable syringe
CN2328376Y (en) * 1998-05-20 1999-07-14 蔡纪发 Rubber piston for injector
CN2357746Y (en) * 1999-01-21 2000-01-12 郑鉴 Disposable injector capable of preventing reuse
CN2505111Y (en) * 2001-08-08 2002-08-14 陈超雄 Self-destruction type syringe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000057A1 (en) * 1987-07-02 1989-01-12 Robert John Charles Foster Single fill and use syringe
CN2234276Y (en) * 1995-11-07 1996-09-04 陈建国 Self-destroying type disposable syringe
CN2328376Y (en) * 1998-05-20 1999-07-14 蔡纪发 Rubber piston for injector
CN2357746Y (en) * 1999-01-21 2000-01-12 郑鉴 Disposable injector capable of preventing reuse
CN2505111Y (en) * 2001-08-08 2002-08-14 陈超雄 Self-destruction type syringe

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