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WO2010081346A1 - Seringue de sécurité autodestructible à faible résidu - Google Patents

Seringue de sécurité autodestructible à faible résidu Download PDF

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Publication number
WO2010081346A1
WO2010081346A1 PCT/CN2009/074842 CN2009074842W WO2010081346A1 WO 2010081346 A1 WO2010081346 A1 WO 2010081346A1 CN 2009074842 W CN2009074842 W CN 2009074842W WO 2010081346 A1 WO2010081346 A1 WO 2010081346A1
Authority
WO
WIPO (PCT)
Prior art keywords
push rod
syringe
elastic
retaining ring
low
Prior art date
Application number
PCT/CN2009/074842
Other languages
English (en)
Chinese (zh)
Inventor
林作钱
Original Assignee
Lin Zuoqian
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 Lin Zuoqian filed Critical Lin Zuoqian
Publication of WO2010081346A1 publication Critical patent/WO2010081346A1/fr

Links

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
    • A61M5/178—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
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • 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
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/323—Connection between plunger distal end and needle hub proximal end, e.g. stud protruding from the plunger

Definitions

  • the present invention pertains to a medical device, and in particular to a disposable, self-destructing syringe.
  • Syringes are an indispensable tool for medical treatment.
  • today's syringes use disposable products, but such disposable syringes can be reused if they are not artificially destroyed.
  • Disposable syringes have been reused to cause cross-contamination, spread diseases, and many syringes have emerged.
  • the push rod is provided with a snap-fit member that engages with the syringe.
  • the technical problem to be solved by the present invention is to provide a low-residue safety self-destructing syringe which is pushed to the end with the front end on the zero line and does not generate bubbles at the top of the rubber plug.
  • the present invention adopts the following technical solutions:
  • a low-residue safety self-destructing syringe includes a hollow syringe, a push rod sliding in the syringe, a rubber plug installed at the front end of the push rod, a needle holder mounted on the front end of the syringe, and the needle holder supported by the support base
  • An elastic claw is arranged on the inner side of the support seat, and a front end of the push rod is provided with a frustum that engages with the elastic claw after the injection is completed, wherein: the cone bottom of the frustum is in contact with the top of the rubber plug when not injected,
  • the rubber plug is hollow, and the push rod is provided with a stopper that pushes against the rubber plug, and the glue is injected.
  • the plug is compressed by the reaction force generated by the injection and the thrust of the stopper.
  • the frustum at the front end of the push rod extends forward in the axial direction of the push rod, and the frustum can be engaged with the elastic claw after the injection.
  • the cone bottom of the pusher frustum is not in contact with the top of the rubber plug when not injected, the height of the frustum is short, the liquid does not generate bubbles at the top of the rubber plug, and the exhaust gas is unobstructed after the liquid is pumped. Unobstructed, the amount of residual injection in the syringe after injection is small, especially suitable for small dose syringes such as insulin syringes.
  • the present invention adopts the following further technical solution: the lower end of the needle seat is formed with a first elastic supporting claw, and the inner wall of the needle barrel is provided with a card slot into which the first elastic supporting claw can be inserted, and the outer side of the upper end of the supporting seat Pressing the inner side of the first elastic claw, a connecting piece with an injection liquid through hole is installed in the needle seat, and the first step is provided at the upper end of the connecting piece, and correspondingly, the inner side of the needle seat is provided with a second step which is matched with the first step
  • the lower end of the connecting member is formed with a supporting leg extending into the supporting seat.
  • the inner side of the supporting seat is provided with an inner boss which cooperates with the supporting leg to drive the connecting member to slide downward, and the corresponding supporting leg is provided with a groove into which the inner protruding portion can be embedded.
  • the connecting member is installed in the needle holder, and the space in the needle seat is filled, so that the air remaining in the needle portion is less, and the injection liquid can be completely injected after the injection, and there is no residue.
  • the support seat slides down, the support seat drives the connecting member to slide down, and the connecting member pulls the needle seat to retract inside the syringe.
  • the push rod is provided with a round table
  • the round table is provided with an elastic pawl extending obliquely to the inner wall of the barrel
  • the end of the barrel is provided with an enlarged diameter portion
  • a slanting step is provided at a transition portion between the non-diameter enlarged portion and the enlarged diameter portion of the syringe, and a groove in which the elastic pawl can be engaged when the pull-down push rod is disposed under the inclined step is provided in the enlarged diameter portion
  • the retaining ring at the bottom of the round table.
  • the self-locking mechanism can be disposed at the rear end of the syringe, the push rod is provided with an elastic pawl extending toward the inner wall of the syringe, and the elastic pawl is pulled down when the push rod is pulled down.
  • the groove is inserted into the groove, and the inclined step above the elastic pawl prevents the push rod from moving upward.
  • the retaining ring under the elastic pawl abuts against the bottom of the pusher round table to prevent the push rod from moving downward.
  • the elastic pawl is in the radial direction due to the action of the groove. Also can't move, to achieve the purpose of locking the putter.
  • FIG. 1 is a cross-sectional view showing the state in which the push rod is mounted
  • Figure 2 is a cross-sectional view showing the state in which the push rod is installed
  • Figure 3 is a partial enlarged view of Figure 2;
  • Figure 4 is a cross-sectional view of the pumping state
  • Figure 5 is a cross-sectional view showing the state of completion of injection
  • Figure 6 is a cross-sectional view showing the state in which the needle begins to retract
  • Figure 7 is a cross-sectional view showing the state of self-destruction
  • Figure 8 is a partial enlarged view of Figure 4.
  • Figure 9 is a partial enlarged view of Figure 7;
  • Figure 10 is a cross-sectional view of the rubber plug
  • Figure 11 is a cross-sectional view of the support base
  • Figure 12 is a cross-sectional view of the connector
  • Figure 13 is a schematic structural view of a retaining ring
  • Figure 14 is a cross-sectional view of Figure 13;
  • Figure 15 is a cross-sectional view of the push rod
  • Figure 16 is a cross-sectional view of the syringe
  • Figure 17 is a partial enlarged view of Figure 16
  • Figure 18 is a cross-sectional view of the rubber stopper shown in the second embodiment
  • Figure 19 is a partial enlarged view of the syringe shown in the second embodiment.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the present invention comprises a hollow cylinder 1, a push rod 2 sliding in the barrel, a rubber plug 3 mounted on the front end of the push rod, and a needle holder 4 mounted on the front end of the barrel 1.
  • the needle holder 4 is supported by the support base 5, and the lower end of the support base 5 has an interference fit with the inner wall of the syringe.
  • the inner side of the support base 5 is provided with an elastic claw 6, and the front end of the push rod 2 is connected with a cone through the core 7 of the rubber plug 3.
  • the table 8 and the frustum 8 are engaged with the elastic claws 6 after the injection is completed.
  • the rubber stopper 3 is hollow (see FIG. 10).
  • the hollow plug 9 is formed in the cavity of the rubber plug 3.
  • the push rod is provided with a stopper 10 that pushes against the rubber plug, and the stopper 10 also functions as a fixed rubber plug.
  • the stopper 10 is disposed in the hollow cavity and located below the hollow boss 9, and the stopper 10 abuts against the bottom of the hollow boss 9.
  • the frustum 8 at the front end of the push rod extends forward in the axial direction of the push rod, and the frustum 8 can be coupled with the elastic claw 6 after the injection is completed.
  • Engage see Figure 9).
  • the lower end of the needle hub 4 is formed with a first elastic claw 11
  • the inner wall of the needle cylinder is provided with a card slot 12 into which the first elastic claw 11 can be embedded.
  • the outer side of the upper end of the support base 5 is pressed against the inner side of the first elastic claw 11 , and the outer side of the upper end of the support base 5 is interference-fitted with the inner side of the first elastic claw 11 , and a connecting member 13 is mounted in the needle seat 4 .
  • the connecting member 13 is provided with an injection liquid through hole communicating with the needle, and the upper end of the connecting member 13 is provided with a first step 14 (see FIG. 12), and correspondingly, the inner side of the needle seat 4 is provided with a matching position with the first step 14.
  • the second step 15 is formed with a leg 16 extending into the support base 5 at the lower end of the connecting member 13.
  • the inner side of the support base 5 is provided with an inner boss 17 which is closely matched with the leg 16 to drive the connecting member 13 to slide down (see Fig. 11). Above the corresponding leg 16 is provided a slot 18 into which the inner boss 17 can be inserted (see Fig. 12).
  • the push rod 2 is provided with a round table 19 below the rubber plug 3.
  • the round table 19 is provided with an elastic pawl 20 extending obliquely to the inner wall of the barrel.
  • the bottom surface of the round table 19 is smaller than the round table.
  • a cylinder 191 of 19 the end of the barrel is provided with an enlarged diameter portion 21, and at the transition of the non-diameter enlarged portion 22 and the enlarged diameter portion 21, a slanted step 23 is provided, and a pull-down push rod is provided below the inclined step 23.
  • the enlarged diameter portion 21 is provided with a retaining ring 25 which can abut against the bottom of the truncated cone 19 (see Fig. 9, Fig. 13, Fig. 14), the retaining ring At the upper end of 25, there is a round table that can be gathered toward the center.
  • the second elastic claw 26 at the bottom.
  • the width of the elastic pawl 20 is greater than the spacing 261 of the retaining ring pawl.
  • the outer diameter of the truncated cone 19 is less than or equal to the minimum inner diameter of the helical step 23 of the barrel, and is greater than the minimum inner diameter of the retaining ring 25 at the tip of the second resilient strut 26 .
  • the number of the elastic pawls 20 is at least two and symmetrically arranged, preferably four and symmetrically disposed, and the distance between the symmetric two claw tips is smaller than the inner diameter of the syringe non-diameter increasing portion 22, which is larger than the inner cylindrical inclined step 23
  • the minimum inner diameter of the pawl of the elastic pawl 20 increases obliquely toward the front end of the syringe.
  • the groove 24 is a circular groove in the circumferential direction
  • the upper end surface 91 is an oblique angle or a plane extending from the inside to the outside and in the direction of the head of the elastic pawl 20
  • the side wall 92 is The diameter is greater than the distance between the claw tips of the symmetric elastic pawl 20.
  • the retaining ring 25 is dynamically matched with the inner wall of the enlarged diameter end portion 21 of the syringe, and can move up and down in the axial direction without coming out of the syringe, and the moving distance thereof is greater than the elastic pawl 20 on the push rod 2.
  • the tip of the ring to the bottom of the truncated cone 19 is added with the distance of the length of the inclined step 23 of the syringe.
  • the inner diameter of the upper end of the retaining ring 25 at the claw tip of the second elastic strut 26 is larger than the outer diameter of the push rod cylinder 191, and the upper end of the retaining ring 25 can abut the round table. 19 bottom.
  • the inner ring of the retaining ring 25 is provided with a slope 27 (Fig. 14).
  • the elastic pawl 20 can move up along the inclined surface 27 and gather inwardly, and the circular table 19 can support the second elastic claw 26 of the retaining ring 25. Squeeze in.
  • the inner wall of the needle end diameter increasing portion 21 is provided with a large groove 61 (Fig. 16, Fig. 17) which is matched with the retaining ring 25, and the upper end 62 can be engaged with the upper end 121 of the retaining ring 25 in the concave
  • the lower end of the groove 61 is provided with a flange step 28 (see Fig.
  • the outer ring of the upper end of the retaining ring 25 is provided with a flange 29 (see Fig. 14), and the flange step 28 is in contact with the bottom end surface 122 of the flange 29, and the step 28 The retaining ring 25 is prevented from slipping out of the barrel.
  • step 23 of the step 23 is in contact with, and under the action of the inclined surface 81, elastic deformation is generated in the direction of the center portion of the push rod, and the inner diameter of the inclined step 23 is minimized as the push rod moves downward, and the elasticity is elastic.
  • the pawl 20 After the pawl 20 passes the minimum inner diameter of the inclined step 23, it returns to its original natural state by its own elasticity, and the claw tip of the elastic pawl 20 is caught in the groove 24 below the inclined step 23, and when the push rod 2 continues to move downward,
  • the bottom end surface 122 of the upper end flange 29 of the retaining ring 25 is in contact with the inner wall flange step 28 of the syringe end diameter increasing portion 21, preventing the push rod from moving downward, and if there is a certain external force pushing the push rod in the injection direction, due to the elasticity spine 20 play the role to prevent the action of the groove 24, the groove 24 side wall 92 can prevent the elastic ratchet reversing the direction of the barrel wall, the purpose of locking the push rod.
  • this is a state in which the push rod 2 is mounted in the syringe, and the elastic pawl 20 on the push rod 2 moves upward along the inclined surface 27 of the retaining ring 25,
  • the time retaining ring 25 moves up along the inner wall of the barrel, and the elastic pawl 20 gathers inwardly under the compression of the second elastic claw 26 of the retaining ring; as shown in FIG. 2, the elastic pawl 20 is under the action of the retaining ring 25.
  • the round table 19 Smoothly entering the non-diameter increasing portion 22 of the barrel through the inclined step 23, the round table 19 also presses the second leg 26 of the retaining ring 25 into the non-diameter increasing portion 22 of the barrel, as shown in FIG.
  • the connecting member 13 pulls the needle seat to retract inside the syringe, and the needle holder 4 is separated from the syringe, as shown in FIG. As shown, the push rod is pulled down, the needle holder 4 is retracted, and the elastic pawl 20 slides down the inclined step 23, at which time the elastic pawl 20 snaps into the recess 24 below the inclined step 23. Inside, the putter 2 is locked and self-destruction is completed.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the structure of the syringe except the rubber stopper shown in this embodiment is different from that of the first embodiment, and the rest of the structure is the same.
  • the rubber plug 3' in this embodiment is also hollow, and the difference is that: a rubber ring has a ring 9' formed under the rubber plug, and the stopper 10 is located below the flange 9', and is convex.
  • the edge 9' is offset, and the core 7 of the push rod is provided with a second stopper 10', and the second stopper 10' is located in the hollow cavity of the rubber stopper 3' and is adjacent to the flange 9'.
  • the second stopper 10' Due to the action of the second stopper 10', only the rubber plug located at the upper portion of the second stopper 10' is recessed toward the inside, and the second stopper 10' also functions as a fixing rubber stopper at the time of liquid suction, and also due to the thrust Inertia, at this time, the frustum 8 at the front end of the push rod extends forward in the axial direction of the push rod, and the frustum 8 can be engaged with the elastic claw 6 after the injection.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (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)

Abstract

La présente invention concerne une seringue de sécurité autodestructible à faible résidu qui comporte un cylindre d'aiguille creux (1), une tige de poussée (2) coulissant dans le cylindre d'aiguille (1) et un bouchon de caoutchouc (3) disposé au niveau de l'extrémité antérieure de la tige de poussée (2), un siège d'aiguille (4) disposé au niveau de l'extrémité antérieure du cylindre d'aiguille (1), le siège d'aiguille (4) étant supporté par un siège de support (5). Des griffes élastiques (6) sont disposées à l'intérieur du siège de support (5), et un tronc conique (8) en prise avec les griffes élastiques (6) est disposé au niveau de l'extrémité antérieure de la tige de poussée (2). Le bouchon de caoutchouc (3) est creux, et une butée (10) poussant le bouchon de caoutchouc (3) est disposée sur la tige de poussée (2). Avant l'injection, le bas du cône du tronc conique (8) vient en contact avec le sommet du bouchon de caoutchouc (3). Pendant l'injection, le bouchon de caoutchouc (3) est déformé par compression par la force de réaction générée par l'injection et la poussée de la butée (10). Ensuite, le tronc conique (8) fait saillie le long de l'axe de la tige de poussée (2). Après l'injection, le tronc conique (8) est mis en prise avec les griffes élastiques (6).
PCT/CN2009/074842 2008-12-30 2009-11-06 Seringue de sécurité autodestructible à faible résidu WO2010081346A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810163960.4 2008-12-30
CN2008101639604A CN101444649B (zh) 2008-12-30 2008-12-30 一种低残留安全自毁注射器

Publications (1)

Publication Number Publication Date
WO2010081346A1 true WO2010081346A1 (fr) 2010-07-22

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CN (1) CN101444649B (fr)
WO (1) WO2010081346A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013008094A3 (fr) * 2011-06-03 2013-08-01 Jan Kavalirek Dispositif de capture d'aiguille de seringue et seringue de sécurité équipée du dispositif
CN112895353A (zh) * 2021-01-12 2021-06-04 陈莲香 一种注塑机的射胶设备
CN113274585A (zh) * 2021-06-11 2021-08-20 上海康德莱医疗器械股份有限公司 一种安全注射器

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CN101444649B (zh) * 2008-12-30 2011-01-12 林作钱 一种低残留安全自毁注射器
CN101927048B (zh) * 2009-06-24 2012-03-21 张淑茗 安全注射器的回缩结构
CN201469833U (zh) * 2009-07-30 2010-05-19 林作钱 一种改进的安全注射器
CN101862492B (zh) * 2010-05-27 2012-11-14 徐雪花 安全自毁式注射器
CN101850144B (zh) * 2010-06-18 2012-07-25 徐雪花 安全自毁式注射器
CN101862490B (zh) * 2010-06-21 2012-07-11 温岭市千禧光医疗器械有限公司 一种可换针自毁式胰岛素注射器
CN109350806B (zh) * 2018-12-13 2024-06-25 河南曙光汇知康生物科技股份有限公司 一种一次性安全自毁注射器
CN110227199A (zh) * 2019-05-21 2019-09-13 李豫 一种新型无金属漏斗留置针
CN110694137B (zh) * 2019-11-04 2021-10-01 上海康德莱企业发展集团股份有限公司 一种无缝填充免针加药接头
CN112999468B (zh) * 2021-02-09 2023-07-04 上海康德莱医疗器械股份有限公司 一种安全注射器
CN113018590B (zh) * 2021-02-26 2023-05-12 上海康德莱医疗器械股份有限公司 一种安全注射器
CN113092803B (zh) * 2021-05-19 2022-11-29 青岛瑞斯凯尔生物科技有限公司 一种精确防气泡分析仪器专用装置及其方法
CN113368342B (zh) * 2021-07-20 2024-08-09 求精医疗器械(浙江)有限公司 一次性低残留防针刺安全注射器
CN113941050B (zh) * 2021-10-21 2024-10-15 舟山医院 一种药物调配用的自毁式针筒
CN114191656A (zh) * 2021-12-30 2022-03-18 浙江娇阳生物医疗科技有限公司 给药装置和给药方法

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US20080097303A1 (en) * 2006-06-02 2008-04-24 Chih-Hsiung Chen Syringe with retractable needle
CN101444649A (zh) * 2008-12-30 2009-06-03 林作钱 一种低残留安全自毁注射器
CN101513547A (zh) * 2009-03-17 2009-08-26 林作钱 一种小剂量安全自毁胰岛素注射器
CN201324418Y (zh) * 2008-12-30 2009-10-14 林作钱 一种低残留安全自毁注射器

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CN2549987Y (zh) * 2002-05-24 2003-05-14 山东威高集团医用高分子制品股份有限公司 自毁式注射器
CN2659471Y (zh) * 2003-11-06 2004-12-01 山东威高集团医用高分子制品股份有限公司 自毁式安全注射器
CN100471533C (zh) * 2006-08-14 2009-03-25 林作钱 一次性使用自毁式注射器

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US3874382A (en) * 1972-04-04 1975-04-01 Louis Nogier Sealing piston cap for hypodermic injection syringe
CN2580977Y (zh) * 2002-10-25 2003-10-22 亨旺国际股份有限公司 软质活塞的回拉式安全注射器
CN2650779Y (zh) * 2003-11-06 2004-10-27 林作钱 一种分离式自毁注射器
CN2684846Y (zh) * 2003-11-18 2005-03-16 亨旺生化科技股份有限公司 回拉式安全注射器
CN2686631Y (zh) * 2004-03-30 2005-03-23 亨旺生化科技股份有限公司 回拉式安全注射器的换针辅助转接头结构
CN2724733Y (zh) * 2004-09-15 2005-09-14 亨旺生化科技股份有限公司 回拉式安全注射器
US20080097303A1 (en) * 2006-06-02 2008-04-24 Chih-Hsiung Chen Syringe with retractable needle
CN101444649A (zh) * 2008-12-30 2009-06-03 林作钱 一种低残留安全自毁注射器
CN201324418Y (zh) * 2008-12-30 2009-10-14 林作钱 一种低残留安全自毁注射器
CN101513547A (zh) * 2009-03-17 2009-08-26 林作钱 一种小剂量安全自毁胰岛素注射器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013008094A3 (fr) * 2011-06-03 2013-08-01 Jan Kavalirek Dispositif de capture d'aiguille de seringue et seringue de sécurité équipée du dispositif
CN112895353A (zh) * 2021-01-12 2021-06-04 陈莲香 一种注塑机的射胶设备
CN113274585A (zh) * 2021-06-11 2021-08-20 上海康德莱医疗器械股份有限公司 一种安全注射器

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