WO2007115481A1 - Self-destroying disposable syringe and self-destroying method thereof - Google Patents

Self-destroying disposable syringe and self-destroying method thereof Download PDF

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Publication number
WO2007115481A1
WO2007115481A1 PCT/CN2007/001009 CN2007001009W WO2007115481A1 WO 2007115481 A1 WO2007115481 A1 WO 2007115481A1 CN 2007001009 W CN2007001009 W CN 2007001009W WO 2007115481 A1 WO2007115481 A1 WO 2007115481A1
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WO
WIPO (PCT)
Prior art keywords
syringe
self
needle
pad
ring
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2007/001009
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English (en)
French (fr)
Inventor
Jianquan Li
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US12/294,454 priority Critical patent/US8096974B2/en
Priority to EP07720583.9A priority patent/EP2000164B1/en
Priority to KR1020087024814A priority patent/KR101052100B1/ko
Priority to JP2009501822A priority patent/JP4912457B2/ja
Priority to ES07720583.9T priority patent/ES2606294T3/es
Priority to AU2007236451A priority patent/AU2007236451B2/en
Publication of WO2007115481A1 publication Critical patent/WO2007115481A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • A61M5/508—Means for preventing re-use by disrupting the piston seal, e.g. by puncturing
    • 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
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • 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
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M2005/3206—Needle or needle hub disconnecting devices forming part of or being attached to the hub or syringe body
    • 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 disposable syringes in the field of medical devices, and more particularly to a safe, fully self-destructing disposable syringe, and a self-destructing method for disposable syringes. Background technique
  • disposable syringes are various in variety and structure.
  • the former has poor self-destruction performance due to only the plug lock and the lock chamber, and the latter has a complicated structure and is difficult to process.
  • FIG. 1 Another Chinese patent CN200420105856.7 "Complete self-destructive disposable syringe” discloses a syringe, as shown in Fig. 1, comprising a needle 1, a syringe 2, a handle 3 and a pad 4.
  • the end of the needle 1 is provided with a double self-destructing ring;
  • the front end of the handle 3 is provided with a nipple matched with the special-shaped piston-shaped rubber pad 4, and the rear portion is provided with a self-locking ring which can be engaged with the syringe 2.
  • Interlocking claws Although the syringe with the above structure can achieve self-destruction, it is not satisfactory, and the following problems mainly exist: 1.
  • the needle structure is complicated, the self-destruction resistance is increased, the self-destruction effect is affected, and the tip of the handle 3 end is increased.
  • the lancet end and the spherical bulge are inconvenient to produce and assemble; 3.
  • the front end of the push handle 3 is provided with a pusher that cooperates with the syringe, and the piston-shaped rubber pad 4 is sealed, so that the syringe is easy to be pushed during the pushing process.
  • the formation of negative pressure, a certain resistance, is not conducive to injection; 4, the processing of special-shaped rubber pads is difficult.
  • Another object of the present invention is to provide a self-destructing method for a disposable syringe to improve the self-destructive effect of the syringe while simplifying the structure of the disposable syringe.
  • the present invention provides a self-destructive disposable syringe comprising: a syringe comprising a nipple disposed at a front end of the syringe, a convex edge being provided on an inner wall of the nipple; a needle connected to the needle a nipple comprising a connecting portion, a receiving portion disposed outside the connecting portion, and a self-destructing ring disposed at the rear end of the needle and connected to the connecting portion by one or more ribs; when the needle is coupled to the syringe, The connecting portion and the self-destructing ring are located inside the syringe nipple, and the self-destructing ring cooperates with the protruding edge; a push rod is movably inserted into the syringe, including a shaft and a rear end connected to the shaft a push handle, a pusher attached to the front end of the stalk body, a
  • the push rod is provided with an exhaust groove penetrating the tip portion, the cone portion and the push plate.
  • the spiked portion of the push rod includes a pointed end and a spiked handle connecting the spiked end to the cone; wherein, at the junction of the spiked end and the pointed handle, The diameter of the pointed tip is greater than the diameter of the spiked handle.
  • the tapered portion of the pusher includes a first cone coupled to the spike and a second cone coupled to the pusher, and an annular groove is disposed between the first and second cones.
  • the rear end of the pad is provided with a projection that cooperates with the annular groove of the cone portion.
  • the cavity of the pad includes a first cavity proximate the front end of the pad and a second cavity proximate the rear end of the pad, wherein the diameter of the first cavity is less than the diameter of the second cavity.
  • the outer wall of the pad is provided with one or more convex rings that cooperate with the inner wall of the cylinder.
  • the front end of the pad is provided with a recess that matches the self-destruction ring of the needle.
  • the mat is made of an elastic material.
  • the diameter of the pusher pusher is larger than the diameter of the pusher shaft.
  • the inner wall of the barrel is provided with an inwardly projecting projection adjacent the rear end of the barrel, the projection being configured and dimensioned to match the pusher.
  • the self-destructing ring of the needle is provided with an opening in the axial direction.
  • the outer wall of the self-destructing ring is provided with an annular recess such that when the needle is coupled to the barrel nipple, a convex edge on the inner wall of the nipple is located in the recess of the self-destructing ring.
  • the convex edge of the syringe nipple projects inwardly and rearwardly on the inner wall of the nipple.
  • the outer wall of the needle connector is provided with a sealing ring that cooperates with the inner wall of the syringe nipple.
  • the present invention also provides a method of self-destructing a disposable syringe. The method includes: providing a syringe, a nipple is disposed at a front end of the syringe, and a convex edge is disposed on an inner wall of the nipple; a needle is disposed, the needle includes a connecting portion, and a receiving portion disposed outside the connecting portion And set on the needle a rear end of at least one self-destructing ring connected to the connecting portion by one or more ribs; a push rod including a shaft, a push handle connected to the rear end of the shaft, a pusher connected to the front end of the shaft, a cone fixed to one end of the push plate and a spiked portion fixed to the other end of the cone; a pad is provided, the inside of the pad is provided with
  • step of continuing to push the push rod to cause the syringe to self-destruct further comprises: pushing the push rod to cause the tip portion to pierce the front wall of the pad; continuing to push the push rod to make the tip portion a self-destructing ring that passes through the needle; and a pusher that pushes the needle to separate the self-destructive ring of the needle.
  • the spiked portion of the push rod includes a spiked end and a pointed handle connecting the pointed end to the cone portion, wherein the junction of the spiked end and the pointed handle, The diameter of the tip end is larger than the diameter of the tip handle.
  • the method further comprises: pushing the push rod such that the spiked end of the push rod passes out of the self-destructing ring.
  • the syringe of the present invention is provided with multiple self-destructing measures to ensure the safe use of the syringe. Specifically, first, after the injection is completed, the tip of the push rod can cause the self-destructive ring of the needle to fall off the needle and lock in the nipple of the syringe, causing the syringe to self-destruct; after the second syringe is self-destructed, the needle The self-locking ring in the cylinder is integrally connected with the push rod and the pad, and is locked by the convex edge on the inner wall of the nipple, so that the push rod cannot move in the syringe; Third, after the self-destruction of the syringe, the exhaust groove on the push rod The space between the front and rear sides of the inner pad of the syringe is connected, so that the syringe can no longer absorb the liquid medicine; Fourth, even if the push rod is pulled
  • the syringe of the present invention has a small resistance at the time of self-destruction and is easy to handle. Since the opening is provided on the self-destructing ring, the resistance of the syringe of the present invention to self-destruction can be effectively reduced. In addition, the exhaust groove at the front end of the push rod allows the syringe to communicate back and forth without negative pressure, thereby reducing the resistance at self-destruction.
  • the syringe of the present invention has a simple structure and is easy to assemble and use; And each part is easy to process and produce. Moreover, the cost of the syringe of the present invention is only slightly higher than that of the conventional disposable syringes, but it has high safety of use, which is beneficial to the full promotion and safe injection.
  • the medical staff can achieve self-destruction of the syringe without touching the used needle by hand, thereby effectively preventing the medical staff from being infected by accidental puncture.
  • the needle with the metal needle is separated from the rest of the syringe, which is also advantageous for the classification and recycling of plastic and metal materials, and is environmentally friendly.
  • Figure 1 is a schematic view showing the structure of a prior art disposable syringe
  • FIG. 2 is a schematic structural view of a disposable syringe of the present invention
  • Figure 3A is a perspective view of the needle of Figure 2;
  • Figure 3B is a cross-sectional view of the needle of Figure 3A;
  • Figure 4A is a perspective view of the syringe of Figure 2;
  • Figure 4B is a cross-sectional view of the syringe of Figure 4A;
  • Figure 5A is a perspective view of the push rod of Figure 2;
  • Figure 5B is a plan view of the pusher of Figure 5A;
  • Figure 6 is a cross-sectional view of the rubber pad of Figure 2;
  • Figure 7 is a cross-sectional view showing the normal use state of the syringe of the present invention.
  • Fig. 8 is a cross-sectional view showing the state of the syringe of the present invention after self-destruction, in which the needle which has fallen off is removed. The best way to implement the invention
  • the syringe 100 of the present invention includes a syringe 20, a needle 10 coupled to the syringe 20, a push rod 30 disposed in the syringe 20 and movable therein, and a pad 40 coupled to the front end of the push rod 30.
  • the syringe 20, the push rod 30 are made of plastic, and the mat 40 is made of a resilient material such as rubber.
  • the needle 10 includes a connection portion 13 for connection to the syringe 20, and is provided.
  • the housing portion 14 outside the connecting portion 13 is provided.
  • a self-destructing ring 15 is provided at the rear end 12 of the needle, and the self-destructing ring 15 is connected to the connecting portion 13 by one or more ribs 16.
  • the front end 11 of the needle is used to connect a needle for injection (not shown).
  • an opening 17 is provided in the axial direction on the self-destructing ring 15.
  • the outer wall of the self-destructing ring 15 is provided with an annular groove 151 which divides the self-destructing ring 15 into a first portion 15a and a second portion 15b.
  • the second portion 15b of the self-destructing ring and the groove 151 are completely cut by the opening 17, and the first portion 15a is only partially cut by the opening 17.
  • the syringe 20 has a hollow structure, and a nipple 23 for attaching the needle 10 is provided at the front end 21 of the barrel, and a handle ear 26 for easy injection is provided at the rear end 22 of the barrel.
  • a convex edge 24 projecting inward.
  • the ledge 24 projects in a diagonally rearward direction toward the rear end of the barrel.
  • the ledge 24 is located in the recess 151 of the outer wall of the self-destructing ring.
  • one or more openings 241 may be provided in the ledge 24 to facilitate the engagement of the self-destructing ring 15 with the ledge 24.
  • a sealing ring 18 (shown in Fig. 3A) is provided on the outer wall of the connecting portion 13 to cooperate with the inner wall of the nipple 23, thereby improving the sealing between the needle 10 and the syringe 20 when the syringe is in normal use. .
  • the push rod 30 includes a shaft 31, a push handle 32 connected to the rear end 31b of the shaft, a pusher 33 connected to the front end 31a of the shaft, a cone 34 fixed to the pusher 33 at one end, and fixed.
  • the diameter of the pusher disc 33 is set to be larger than the diameter of the shaft 31.
  • the inner wall of the barrel 20 is provided with an inwardly projecting projection 25 (see Fig. 4B) near the rear end 22 of the barrel, and the size and structure of the projection 25 are matched with the pusher 33, making the pusher 33 difficult to pass. It is pulled out of the barrel through the projection 25.
  • the push rod 30 is further provided with an exhaust groove 36 extending through the tip portion 35, the cone portion 34 and the pusher plate 33.
  • the cone portion 34 is for mating with the pad 40.
  • the pad 40 is attached to the cone portion 34 so that the pad 40 can move in the syringe 20 as the push rod 30 moves during normal use of the syringe.
  • the cone portion 34 includes a first cone 341 coupled to the spike portion 35 and a second cone 342 coupled to the push plate 33, disposed between the first and second cones Annular groove 343.
  • the cusp portion 35 includes a spiked end 351 and a spiked handle 352 that connects the spiked end 351 to the cone portion 34.
  • the diameter of the spiked end 351 is greater than the diameter of the spiked handle 352.
  • the pad 40 has an internal cavity 45.
  • the front end 41 of the mat is provided with a closed front wall 43 and its rear end 42 is provided with an opening 46 communicating with the internal cavity 45.
  • the front end 41 of the pad is further provided with a recess 44 that matches the self-destructing ring 15 to reduce the amount of liquid remaining in the syringe 20 after the injection is completed. At the same time, the recess 44 can also help to reduce the thickness of the front wall 43.
  • the rear end 42 of the pad is provided with a projection 47 that cooperates with the annular groove 343 of the cone portion 34.
  • the inner cavity 45 of the pad includes a first cavity 451 adjacent the front end 41 of the pad and a second cavity 352 adjacent the rear end 42 of the pad, wherein the diameter of the first cavity 451 is set to be smaller than the diameter of the second cavity 452 .
  • the figure shows the state of the syringe 100 in normal use.
  • the pad 40 is located in the barrel 20 with its projection 47 mating with the annular groove 343 of the pusher cone portion such that the pad 40 can move with the push rod 30 in the syringe 20.
  • the spike portion 35 of the push rod and the first cone 341 are located in the cavity 45 of the pad, while the second cone 342 is located outside the cavity 45.
  • the needle connecting portion 13 and the self-destructing ring 15 are located in the syringe nipple 23; the containing portion 14 is enclosed on the outer side of the nipple 23 to improve the seal between the needle and the syringe.
  • the convex edge 24 on the inner wall of the nipple is located in the recess 151 on the outer wall of the self-destructing ring so as to be able to cooperate with the self-destructing ring 15 to prevent the needle 10 from coming off the syringe 20 at the time of injection.
  • the pusher 30 is pushed forward to achieve self-destruction of the syringe 100.
  • the second portion 15b of the self-destructing ring is located in the recess 44 at the front end of the pad such that the front wall 43 of the pad' fits against the self-destructing ring 15. Since the pad 40 is made of an elastic material, the pusher 30 is continuously pushed forward, and the projection 47 at the rear end of the pad is pressed and deformed, so that the pusher 30 can continue to move forward relative to the 'pad 40.
  • Movement of the push rod 30 causes the second cone 342 to pass through the opening 46 at the rear end of the pad and into the cavity 45 while the tip portion 35 pierces the front wall 41 of the pad and passes through the self-destructing ring 15.
  • the diameter of the second cavity 452 is larger than the diameter of the first cavity 453, the resistance of the funnel portion 34 as it moves in the cavity 45 can be reduced.
  • the opening 17 provided on the self-destructing ring can reduce the resistance of the sharp portion 35 as it passes through the self-destructing ring.
  • the rib 16 connecting the self-destructing ring 15 and the connecting portion 13 is provided as a frangible structure which cannot withstand the pulling force.
  • the spike portion 35 passing through the self-destructing ring 15 contacts and presses the joint portion 13 forward, causing the rib 16 to break and the self-destructing ring 15 to be detached from the needle 10.
  • the needle 10 is separated from the syringe nipple by the spike portion 35, for example, dropped into the dirt bucket.
  • the syringe 100 is self-destructive.
  • the self-destructing syringe is shown in Figure 8.
  • the spike end 351 is passed out of the self-destructing ring 15, so that the self-destructing ring 15 is placed over the spiked handle 352. Since the diameter of the pointed end 351 is larger than the diameter of the pointed handle 352 at the junction of the spiked end 351 and the spiked handle 352, the tip portion 35 is It is difficult to withdraw from the self-destructing ring 15.
  • the ledge 24 on the syringe nipple remains in the recess 151 of the self-destructing ring.
  • the self-destructing ring 15, the pad 40 and the push rod 30 are integrated and locked by the flange 24 in the barrel so that the self-destructing syringe cannot be reused.
  • the obliquely disposed flange 24 better locks the self-destructing ring 15 during self-destruction of the syringe, preventing the self-destructive ring 15 from being pushed out of the syringe nipple 23 by the spike portion 35.
  • venting groove 36 penetrates the cusp portion 35, the cone portion 34, and the pusher disc 33, after the syringe is self-destructed, the inside of the syringe before the pad 40 and the inside of the barrel after the pad 40 communicate with each other, thereby The sterilized syringe can no longer absorb the liquid. In this way, even after the self-destructive ring is strongly destroyed and the push rod is pulled out, the self-destructing syringe cannot be used again. This ensures the safe use of disposable syringes.
  • the projection 25 of the barrel cooperates with the pusher 33 of the pusher so that the pusher 33 is difficult to pull out of the syringe 20 by passing through the projection 25.
  • the push rod 30 cannot be pulled out of the syringe 20 after the syringe is self-destructed.
  • the pad 40 at the front end of the push rod is separated from the push rod by the blocking action of the protruding portion 25 and remains inside the syringe. The syringe cannot be used again.
  • the syringe of the present invention has a multiple self-destructing structure, thereby effectively ensuring the safe use of the disposable syringe.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Description

自毁式一次性注射器及其自毁方法 技术领域
本发明涉及医疗器械领域中的一次性注射器，尤其是涉及一种安全型完全 自毁式的一次性注射器， 以及一次性注射器的自毁方法。 背景技术
随着社会的进步和科学技术的发展，一次性注射器全面取代可重复使用的 注射器是大势所趋。现有技术中， 一次性注射器的品种多样、 结构各异。如中 国专利 CN200320110786.X "塞锁自毁安全型注射器"和 CN03266160.6 "内插 式自毁型一次性注射器"中公开的注射器，虽然在避免重复使用方面有技术上 的进步， 但仍存在一些问题。 比如， 前者由于仅由塞锁头与塞锁腔配合， 自毁 性能差；而后者结构复杂，难以加工。另一项中国专利 CN200420105856.7 "完 全自毁式一次性注射器"公开了一种注射器， 如图 1所示， 包括针头 1、 针筒 2、 手推柄 3和胶垫 4。 其中， 针头 1的端部设有双重自毁环； 手推柄 3的前 ^设有与异形活塞状的胶垫 4配套的乳头，其后部设有能够与针筒 2的自锁环 进行互锁的荆爪。虽然具有上述结构的注射器能够实现自毁，然而还不尽如人 意， 主要存在以下问题： 1、针头结构复杂， 增大了自毁阻力， 影响自毁效果 2、手推柄 3端部的尖刺端头和球形凸头不便于生产和组装； 3、手推柄 3的前 端设有与针筒配合的推盘，且该由活塞状胶垫 4密封， 因此在推送过程中针筒 内容易形成负压， 产生一定的阻力， 不利于注射； 4、 异形胶垫的加工存在难 度。 发明公开
本发明的目的在于提供一种自毁效果好、结构简单、便于装配和使用的自 毁式一次性注射器， 以克服现有技术中存在的一个或多个不足。
本发明的另一个目的在于提供一种一次性注射器的自毁方法，以在简化一 次性注射器结构的前提下提高注射器的自毁效果。
为了实现上述目的，本发明提供了一种自毁式一次性注射器，包括：针筒， 包括设置在针筒前端的乳头，在该乳头的内壁上设有凸沿； 针头， 连接到该针 筒乳头， 包括连接部、设置在该连接部外侧的包容部、 以及设置在针头后端通 过一个或多个筋与该连接部相连的自毁环； 当该针头连接到该针筒上时，该连 接部和该自毁环位于该针筒乳头的内部， 并且该自毁环与所述凸沿相互配合； 推杆， 可移动地插入到该针筒中， 包括杆身、连接到杆身后端的推柄、连接到 秆身前端的推盘、一端固定到推盘的锥体部、以及固定到锥体另一端的尖刺部； 以及垫，连接到该推杆的锥体部，该垫的内部设有用于容纳推杆的尖刺部的空 腔， 垫的前端设有封闭的前壁， 而其后端设有与该空腔连通的开口。
优选地， 该推杆上设有贯穿所述尖剌部、 锥体部和推盘的排气槽。
优选地，该推杆的尖刺部包括尖剌端头和将该尖刺端头连接到该锥体部的 尖刺柄；其中， 在该尖刺端头与该尖剌柄的连接处， 该尖剌端头的直径大于该 尖刺柄的直径。
优选地，该推杆的锥体部包括与该尖刺部相连的第一锥体和与该推盘相连 的第二锥体， 在该第一和第二锥体之间设有环形槽。
优选地， 该垫的后端设有与该锥体部的环形槽相配合的突出部。
优选地， 该垫的空腔包括靠近垫前端的第一空腔和靠近垫后端的第二空 腔， 其中该第一空腔的直径小于该第二空腔的直径。
优选地， 该垫的外壁上设有一个或多个与该针筒内壁配合的凸环。
优选地， 该垫的前端设有与该针头自毁环相匹配的凹陷。
优选地， 该垫由弹性材料制成。
优选地， 所述推杆推盘的直径大于推杆杆身的直径。
优选地，所述针筒内壁在靠近针筒后端的位置设有向内突出的突出部，该 突出部的结构和尺寸设计为与该推盘相匹配。
优选地， 所述针头的自毁环上设有沿轴向的开口。
优选地，所述自毁环的外壁上设有环形的凹槽，使得当该针头连接到该针 筒乳头时， 该乳头内壁上的凸沿位于该自毁环的凹槽中。
优选地， 该针筒乳头的凸沿从而该乳头的内壁上向内向后突出。
优选地， 该针头连接部的外壁设有与该针筒乳头的内壁配合的密封环。 本发明还提供了一种对对一次性注射器进行自毁的方法。该方法包括：设 置一针筒， 在该针筒的前端设有一乳头， 在该乳头的内壁上设有凸沿； 设置一 针头， 所述针头包括连接部、设置在该连接部外侧的包容部、 以及设置在针头 后端通过一个或多个筋与该连接部相连的至少一个自毁环；设置一推杆，所述 推杆包括杆身、连接到杆身后端的推柄、连接到杆身前端的推盘、一端固定到 推盘的锥体部、 以及固定到锥体另一端的尖刺部； 设置一垫， 该垫的内部设有 用于容纳推杆的尖刺部的空腔，在垫的前端设置一封闭的前壁，并在其后端设 置与该空腔连通的开口；将该针头连接到该针筒上，使得该针头的连接部和该 自毁环位于该针筒的乳头内部，并且该自毁环与所述凸沿相互配合；将该垫连 接到该推杆的锥体部； 将该推杆插入到该针筒中， 使得该垫位于该针筒中， 并 且随着该推杆一起沿该针筒移动； 以及在注射操作完成后，继续推动该推杆使 该注射器自毁。
其中，所述继续推动该推杆使该注射器自毁方法的步骤还包括：推动该推 杆， 使其尖剌部刺穿所述垫的前壁； 继续推动该推杆， 使其尖剌部穿过该针头 的自毁环； 以及利用该推杆推动该针头的连接部与该针头的自毁环分离。
优选地，该推杆的尖刺部包括尖刺端头和将该尖剌端头连接到该锥体部的 尖剌柄，其中， 在该尖刺端头与该尖剌柄的连接处， 该尖剌端头的直径大于该 尖剌柄的直径。
优选地， 所述方法还包括：推动该推杆， 使该推杆的尖刺端头穿出所述自 毁环。
根据本发明的一个方面，本发明的注射器设有多重自毁措施，从而能够有 效保证注射器的使用安全。具体来说， 第一， 在注射完成后， 推杆的尖剌部能 够使得针头的自毁环从针头上脱落并锁定在针筒乳头中，造成注射器自毁；第 二注射器自毁后，针筒内的自锁环与推杆和垫连接成一体，并被乳头内壁上的 凸沿锁定， 因此使得推杆不能在针筒中移动； 第三， 注射器自毁后， 推杆上的 排气槽连通了针筒内垫前后两侧的空间， 使得该针筒无法再吸取药液； 第四， 即使通过强力拉出推杆，推杆前端的垫将会脱离推杆、 留于针筒内部， 使得针 筒无法再次使用。
根据本发明的又一个方面，本发明的注射器在自毁时的阻力小，便于操作。 由于自毁环上设有开口，从而能够有效减少本发明注射器自毁时的阻力。另外， 推杆前端的排气槽使得针筒前后连通无负压产生， 从而也能减小自毁时的阻 力。
根据本发明的又一个方面， 本发明注射器的结构简单， 便于组装和使用； 并且各部件易于加工生产。而且，本发明注射器的成本只略高于现有的普通一 次性注射器但却具有很高的使用安全性，有利于全面推广使用，实现安全注射。
根据本发明的另一个方面，使用本发明的注射器，医务人员无需用手接触 用过的针头即可实现注射器的自毁，从而能够有效避免医务人员因意外刺伤而 发生感染。
根据本发明的再一个方面，本发明的注射器在自毁后，带有金属针的针头 与注射器的其它部分分离，还有利于塑料和金属材料的分类回收利用，有利于 环保。 附图简要说明
图 1为一种现有技术的一次性注射器的结构示意图
图 2为本发明的一次性注射器的结构示意图；
图 3A为图 2中针头的立体图；
图 3B为图 3A中的针头的剖视图；
图 4A为图 2中针筒的立体图；
图 4B为图 4A中的针筒的剖视图；
图 5A为图 2中推杆的立体图；
图 5B为图 5A中的推杆的平面图；
图 6是图 2中胶垫的剖视图；
图 7为示出本发明注射器正常使用状态的剖视图； 以及
图 8为示出了本发明注射器自毁后的状态的剖视图，其中去除了已脱落的 针头。 实现本发明的最佳方式
下面结合附图对本发明作进一步说明。
如图 2所示，本发明的注射器 100包括针筒 20、连接到针筒 20的针头 10、 设置在针筒 20中并可在其中移动的推杆 30以及连接在推杆 30前端的垫 40。 优选地， 针筒 20、 推杆 30由塑料制成， 而垫 40由具有弹性的材料例如橡胶 制成。
如图 3A、 3B所示， 针头 10包括用于与针筒 20相连的连接部 13、 设置 在连接部 13外侧的包容部 14。 在针头的后端 12设有自毁环 15， 自毁环 15 通过一个或多个筋 16连接到连接部 13。 针头的前端 11用于连接注射用的针 (未示出） 。 优选地， 在自毁环 15上沿轴向设有一开口 17。 根据本发明的一 个实施例， 自毁环 15的外壁上设有环形的凹槽 151， 该凹槽 151将自毁环 15 分成第一部分 15a和第二部分 15b。在这里，自毁环的第二部分 15b和凹槽 151 被开口 17完全切断， 而第一部分 15a仅被开口 17部分切断。
如图 4A、 4B所示， 针筒 20为空心结构， 在针筒的前端 21设有用于连接 针头 10的乳头 23， 在针筒的后端 22设有方便注射的手柄耳 26。 在乳头 23 的内壁上设有向内凸出的凸沿 24。优选地， 凸沿 24朝向针筒的后端沿斜向后 方向突出。当针头 10连接到针筒乳头 23上时，连接部 13和自毁环 15位于针 筒乳头 23中， 并且自毁环 15与的凸沿 24相互配合。具体来说， 凸沿 24位于 自毁环外壁的凹槽 151中。优选地，可以在凸沿 24上设置一个或多个开口 241， 以便于自毁环 15与凸沿 24的配合。 优选地， 在连接部 13的外壁上设有与乳 头 23的内壁相配合的密封环 18 (如图 3A所示） ， 从而能够在注射器正常使 用时提高针头 10与针筒 20之间的密封性。
如图 5A、 5B所示，推杆 30包括杆身 31、连接到杆身后端 31b的推柄 32、 连接到杆身前端 31a的推盘 33、 一端固定到推盘 33的锥体 34以及固定到锥 · 体部 34另一端的尖剌部 35。优选地，设置推盘 33的直径大于杆身 31的直径。 针筒 20的内壁在靠近针筒后端 22的位置设有向内突出的突出部 25(见图 4B)， 设置突出部 25的尺寸和结构与推盘 33相匹配， 使得推盘 33难于通过穿过该 突出部 25而被从针筒中拉出。优选地， 推杆 30上还设有一个贯穿尖剌部 35、 锥体部 34和推盘 33的排气槽 36。锥体部 34用于与垫 40相配合。 具体来说， 垫 40连接到该锥体部 34上， 使得在注射器正常使用时， 垫 40能够与随着推 杆 30的移动而在针筒 20中移动。 根据本发明的一个实施例， 锥体部 34包括 与尖刺部 35相连的第一锥体 341和与推盘 33相连的第二锥体 342， 在第一和 第二锥体之间设有环形槽 343。 在这里， 尖剌部 35包括尖刺端头 351和将尖 刺端头 351连接到锥体部 34的尖刺柄 352。 优选地， 在尖剌端头 351与尖剌 柄 352的连接处， 尖刺端头 351的直径大于尖刺柄 352的直径。
如图 6所示， 垫 40具有内部空腔 45。 垫的前端 41设有封闭的前壁 43， 而其后端 42设有与内部空腔 45相连通的开口 46。 垫的外壁上可以设置一个 或多个与针筒 20的内壁相配合的凸环 48， 以在注射器正常使用时提高垫 40 与针筒 20之间的密封性。 优选地， 在垫的前端 41还设有与自毁环 15相匹配 的凹陷 44， 以减少注射完成后残留在针筒 20中的药液量。 同时， 凹陷 44还 能有助于降低前壁 43的厚度。 垫的后端 42设有与锥体部 34的环形槽 343相 配合的突出部 47。 优选地， 垫的内部空腔 45包括靠近垫前端 41的第一空腔 451和靠近垫后端 42的第二空腔 352，其中设置第一空腔 451的直径小于第二 空腔 452的直径。
图 Ί示出了注射器 100正常使用时的状态。垫 40位于针筒 20中，其突出 部 47与推杆锥体部的环形槽 343相配合， 使得垫 40可随着推杆 30在针筒 20 中移动。 推杆的尖刺部 35和第一锥体 341位于垫的空腔 45中， 而第二锥体 342位于空腔 45之外。针头的连接部 13和自毁环 15位于针筒乳头 23中； 包 容部 14包围在乳头 23的外侧以提高针头与针筒之间的密封性。这时，乳头内 壁上的凸沿 24位于自毁环外壁上的凹槽 151中，从而能够与自毁环 15相配合， 防止在注射时针头 10从针筒 20上脱落。
注射完毕后， 继续向前推动推杆 30可以实现注射器 100的自毁。 具体来 说， 在注射完成时， 自毁环的第二部分 15b位于垫前端的凹陷 44中， 使得垫' 的前壁 43与自毁环 15相贴合。 由于垫 40由弹性材料制成， 因而继续向前推 动推杆 30， 垫后端的突出部 47会被挤压变形， 从而使得推杆 30能够相对于' 垫 40继续向前移动。 推杆 30的移动使得第二锥体 342穿过垫后端的开口 46 并进入到空腔 45中， 同时尖剌部 35刺穿垫的前壁 41并穿过自毁环 15。 应当 注意， 由于第二空腔 452的直径大于第一空腔 453的直径， 因而可以减小锥体 部 34在空腔 45中移动时的阻力。 此外， 设置在自毁环上的开口 17能够减小 尖剌部 35穿过自毁环时的阻力。 在这里， 连接自毁环 15与连接部 13的筋 16 被设置为不能承受拉力的易断结构。这样， 当推杆继续向前移动时， 穿过自毁 环 15的尖刺部 35接触到并向前挤压连接部 13， 使得筋 16断裂， 自毁环 15 从针头 10上脱离。 同时， 针头 10在尖刺部 35的推动下与针筒乳头分离， 例 如掉落到污物桶中。 这样， 注射器 100就完成了自毁。
自毁后的注射器如图 8所示。 此时， 尖刺端头 351从自毁环 15中穿出， 使得所述自毁环 15套在尖刺柄 352上。 由于在尖刺端头 351与尖刺柄 352的 连接处， 尖剌端头 351的直径大于尖剌柄 352的直径， 因而使得尖剌部 35很 难从自毁环 15中抽回。 同时， 针筒乳头上的凸沿 24依然位于自毁环的凹槽 151中。 这样， 自毁环 15、 垫 40和推杆 30就连成了一体， 并且被凸沿 24锁 定在针筒中不能移动， 从而使得自毁后的注射器不能被再次使用。 应当注意， 在进行注射器的自毁时， 斜向后设置的凸沿 24能够更好地锁定自毁环 15， 防 止该自毁环 15被尖刺部 35从针筒乳头 23中推出。
此外， 由于排气槽 36贯穿尖剌部 35、 锥体部 34和推盘 33， 因而在注射 器自毁后，垫 40之前的针筒内部与垫 40之后的针筒内部相互连通，从而使得 自毁后的注射器无法再吸取药液。这样，即使通过强力毁坏自毁环、拉出推杆， 自毁后的注射器也无法再次使用。 从而确保了一次性注射器的使用安全。
另外， 针筒的突出部 25与推杆的推盘 33相配合， 使得推盘 33难于通过 穿过该突出部 25而从针筒 20中拉出。 因而， 使得注射器自毁后， 推杆 30不 能从针筒 20中拉出。 此外， 一旦通过强力破坏突出部 25与推盘 33的配合结 构而拉出推杆 30， 推杆前端的垫 40会因突出部 25的阻挡作用而脱离推杆并 留在针筒内部， 使得该针筒无法再次使用。
可以看出，本发明的注射器具有多重自毁结构，从而能够有效保证一次性 注射器的使用安全。
应当指出，虽然通过上述实施方式对本发明进行了描述，然而本发明还可 有其它多种实施方式。在不脱离本发明精神和范围的前提下，熟悉本领域的技 术人员显然可以对本发明做出各种相应的改变和变形，但这些改变和变形都应 当属于本发明所附权利要求及其等效物所保护的范围内。

Claims

权利要求书
1、 一种自毁式一次性注射器， 其特征在于， 包括
针筒， 包括设置在针筒前端的乳头， 在该乳头的内壁上设有凸沿； 针头， 连接到该针筒乳头， 包括连接部、 设置在该连接部外侧的包容部、 以及设置在针头后端通过一个或多个筋与该连接部相连的自毁环；当该针头连 接到该针筒上时，该连接部和该自毁环位于该针筒乳头的内部，并且该自毁环 与所述凸沿相互配合；
推杆， 可移动地插入到该针筒中， 包括杆身、连接到杆身后端的推柄、连 接到杆身前端的推盘、一端固定到推盘的锥体部、以及固定到锥体另一端的尖 刺部； 以及
垫，连接到该推杆的锥体部，该垫的内部设有用于容纳推杆的尖剌部的空 腔， 垫的前端设有封闭的前壁， 而其后端设有与该空腔连通的开口。
2、 根据权利要求 1所述的注射器， 其特征在于， 该推杆上设有贯穿所述 尖剌部、 锥体部和推盘的排气槽。
3、 根据权利要求 1所述的注射器， 其特征在于， 该推杆的尖剌部包括尖 刺端头和将该尖刺端头连接到该锥体部的尖刺柄;其中，在该尖刺端头与该尖 刺柄的连接处， 该尖刺端头的直径大于该尖刺柄的直径。
4、 根据权利要求 1所述的注射器， 其特征在于， 该推杆的锥体部包括与 该尖刺部相连的第一锥体和与该推盘相连的第二锥体，在该第一和第二锥体之 间设有环形槽。
5、 根据权利要求 4所述的注射器， 其特征在于， 该垫的后端设有与该锥 体部的环形槽相配合的突出部。
6、 根据权利要求 1所述的注射器， 其特征在于， 该垫的空腔包括靠近垫 前端的第一空腔和靠近垫后端的第二空腔，其中该第一空腔的直径小于该第二 空腔的直径。
7、 根据权利要求 1所述的注射器， 其特征在于， 该垫的外壁上设有一个 或多个与该针筒内壁配合的凸环。
8、 根据权利要求 1所述的注射器， 其特征在于， 该垫的前端设有与该针 头自毁环相匹配的凹陷。
9、 根据权利要求 1所述的注射器， 其特征在于， 该垫由弹性材料制成。
10、根据权利要求 1所述的注射器，其特征在于， 所述推杆推盘的直径大 于推杆杆身的直径。
11、 根据权利要求 10所述的注射器， 其特征在于， 所述针筒内壁在靠近 针筒后端的位置设有向内突出的突出部，该突出部的结构和尺寸设计为与该推 盘相匹配。
12、根据权利要求 1所述的注射器，其特征在于， 所述针头的自毁环上设 有沿轴向的开口。
13、根据权利要求 1所述的注射器，其特征在于， 所述自毁环的外壁上设 有环形的凹槽，使得当该针头连接到该针筒乳头时，该乳头内壁上的凸沿位于 该自毁环的凹槽中。
14、 根据权利要求 1或 13所述的注射器， 其特征在于， 该针筒乳头的凸 沿从而该乳头的内壁上向内向后突出。
15、根据权利要求 1所述的注射器，其特征在于， 该针头连接部的外壁设 有与该针筒乳头的内壁配合的密封环。
16、 一种对一次性注射器进行自毁的方法， 包括
设置一针筒， 在该针筒的前端设有一乳头， 在该乳头的内壁上设有凸沿； 设置一针头， 所述针头包括连接部、设置在该连接部外侧的包容部、 以及 设置在针头后端通过一个或多个筋与该连接部相连的至少一个自毁环；
设置一推杆， 所述推杆包括杆身、连接到杆身后端的推柄、连接到杆身前 端的推盘、 一端固定到推盘的锥体部、 以及固定到锥体另一端的尖刺部； 设置一垫，该垫的内部设有用于容纳推杆的尖剌部的空腔，在垫的前端设 置一封闭的前壁， 并在其后端设置与该空腔连通的开口；
将该针头连接到该针筒上，使得该针头的连接部和该自毁环位于该针筒的 乳头内部， 并且该自毁环与所述凸沿相互配合；
将该垫连接到该推杆的锥体部；
将该推杆插入到该针筒中，使得该垫位于该针筒中，并且随着该推杆一起 沿该针筒移动； 以及
在注射操作完成后， 继续推动该推杆使该注射器自毁。
17、 根据权利要求 16所述的方法， 其特征在于， 所述继续推动该推杆使 该注射器自毁的步骤还包括
推动该推杆， 使其尖剌部刺穿所述垫的前壁；
继续推动该推杆， 使其尖刺部穿过该针头的自毁环； 以及 利用该推杆推动该针头的连接部与该针头的自毁环分离。
18、 根据权利要求 17所述的方法， 其特征在于， 该推杆的尖剌部包括尖 刺端头和将该尖刺端头连接到该锥体部的尖剌柄，其中，在该尖刺端头与该尖 刺柄的连接处， 该尖刺端头的直径大于该尖刺柄的直径。
19、 根据权利要求 18所述的方法， 还包括， 推动该推杆， 使该推杆的尖 剌端头穿出所述自毁环。
PCT/CN2007/001009 2006-03-28 2007-03-28 Self-destroying disposable syringe and self-destroying method thereof Ceased WO2007115481A1 (en)

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US12/294,454 US8096974B2 (en) 2006-03-28 2007-03-28 Self-destroying disposable syringe and self-destroying method thereof
EP07720583.9A EP2000164B1 (en) 2006-03-28 2007-03-28 Self-destroying disposable syringe
KR1020087024814A KR101052100B1 (ko) 2006-03-28 2007-03-28 자체 파괴형의 일회용 주사기 및 그의 자체 파괴 방법
JP2009501822A JP4912457B2 (ja) 2006-03-28 2007-03-28 自己破壊型使い捨て注射器とその自己破壊の方法
ES07720583.9T ES2606294T3 (es) 2006-03-28 2007-03-28 Jeringa autodestruible desechable
AU2007236451A AU2007236451B2 (en) 2006-03-28 2007-03-28 Self-destroying disposable syringe and self-destroying method thereof

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CNU2006201102111U CN2877738Y (zh) 2006-03-28 2006-03-28 安全型完全自毁式注射器
CN200620110211.1 2006-03-28

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PL2000164T3 (pl) 2017-02-28
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AU2007236451B2 (en) 2010-07-15
PT2000164T (pt) 2016-12-15
AU2007236451A1 (en) 2007-10-18
KR101052100B1 (ko) 2011-07-26
KR20080113055A (ko) 2008-12-26
US20100280453A1 (en) 2010-11-04
EP2000164B1 (en) 2016-09-07
JP4912457B2 (ja) 2012-04-11
US8096974B2 (en) 2012-01-17
EP2000164A1 (en) 2008-12-10
CN2877738Y (zh) 2007-03-14

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