WO2021088115A1 - Stylo d'injection jetable - Google Patents

Stylo d'injection jetable Download PDF

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Publication number
WO2021088115A1
WO2021088115A1 PCT/CN2019/119045 CN2019119045W WO2021088115A1 WO 2021088115 A1 WO2021088115 A1 WO 2021088115A1 CN 2019119045 W CN2019119045 W CN 2019119045W WO 2021088115 A1 WO2021088115 A1 WO 2021088115A1
Authority
WO
WIPO (PCT)
Prior art keywords
feedback
cylinder
ring
gear ring
wall
Prior art date
Application number
PCT/CN2019/119045
Other languages
English (en)
Chinese (zh)
Inventor
王述芳
任梦强
罗来荣
Original Assignee
江苏万海医疗器械有限公司
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 江苏万海医疗器械有限公司 filed Critical 江苏万海医疗器械有限公司
Publication of WO2021088115A1 publication Critical patent/WO2021088115A1/fr

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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
    • A61M5/178—Syringes
    • 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
    • A61M5/3129—Syringe barrels
    • 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
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • 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
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31545—Setting modes for dosing
    • A61M5/31548—Mechanically operated dose setting member
    • A61M5/31555—Mechanically operated dose setting member by purely axial movement of dose setting member, e.g. during setting or filling 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/27—General characteristics of the apparatus preventing use
    • A61M2205/273—General characteristics of the apparatus preventing use preventing reuse, e.g. of disposables

Definitions

  • the invention relates to the technical field of injection devices, in particular to a disposable injection pen and its feedback component.
  • Disposable injection pen is a common medical appliance that can be used as a household. It is often used to inject insulin. See our company’s prior patent CN 209332900 U for the specific structure.
  • prior patent CN 209332900 U for the specific structure.
  • the first object of the present invention is to provide a feedback assembly. After the injection pen is used on a disposable injection pen, the feedback of the injection pen is stable, the internal parts will not follow-up, and the injection dose is prevented from being affected, and the potential safety hazard can be greatly reduced.
  • the second object of the present invention is to provide a disposable injection pen, which has stable toggle feedback during use, no follow-up of internal parts, avoids the influence of the injection dose, and can greatly reduce potential safety hazards.
  • the first technical solution of the present invention is: a feedback assembly, including an upper feedback cylinder, a feedback connecting cylinder and a feedback gear ring, the lower part of the upper feedback cylinder abuts the upper part of the feedback connecting cylinder,
  • the feedback connecting cylinder has a feedback gear ring on the side close to the feedback gear ring, both sides of the feedback gear ring have feedback gear rings, and the feedback gear ring on the corresponding side is in phase with the feedback gear ring on the feedback connecting cylinder.
  • the upper feedback cylinder is provided with a spring placement groove, and a compression spring is installed in the placement groove.
  • the second technical solution of the present invention is: an injection pen, including the above-mentioned feedback component, and further including: a medicine bin, which is provided with at least one discharge port; Move in a linear direction to push the materials in the medicine bin from the discharge port; a push rod drum, which is configured to move back and forth toward or away from the medicine bin; and the push tube has a linkage dial ring
  • the push cylinder is configured to drive the linkage dial to rotate in a first direction when the push rod drum moves in a direction close to the drug warehouse
  • the linkage dial is configured to rotate in a first direction When rotating, the screw is driven to move in the linear direction, and it also includes a fixed bracket.
  • the outer wall of the push rod drum and the inner wall of the fixed bracket are connected by threads, and the inner wall of the push rod drum is connected to the shaft through a feedback component.
  • the push cylinder is in transmission connection
  • the feedback assembly is located between the push cylinder and the push rod drum
  • the feedback connecting cylinder has a feedback gear ring on the side close to the feedback gear ring
  • the inner wall of the push rod drum has Internal gear ring, when the feedback gear ring moves along its axial direction, the feedback gear ring on the corresponding side engages or disengages from the internal gear ring, and the feedback gear ring on the other side of the feedback gear ring and the feedback gear ring
  • the feedback gear ring on the connecting cylinder is engaged or disengaged, and the inner wall of the feedback connecting cylinder and the outer wall of the pushing cylinder are slidingly connected by a concave-convex structure.
  • the injection pen further includes a scale cylinder sleeved on the push rod drum, the scale cylinder is connected to the push rod drum, and the outer wall of the scale cylinder is provided with a scale.
  • the injection pen includes a pen body tube, the medicine compartment is fixedly connected to one end of the pen body tube, and an observation hole is opened at one end of the pen body tube away from the medicine compartment.
  • the medicine compartment is provided with a bayonet
  • the inner wall of the pen barrel is provided with a bayonet corresponding to the bayonet.
  • the fixing seat is matched with the linkage ring, the screw thread passes through the fixing seat, and the fixing seat is provided with a limiting rib, the limiting rib and The protrusions on the inner wall of the pen barrel are matched.
  • a button is connected to the end of the push rod drum away from the medicine bin, and the button can be retracted into the push rod drum.
  • the inner wall of the feedback connecting cylinder is provided with a guide bar
  • the outer wall of the push cylinder is provided with a guide groove corresponding to the guide bar, and the guide bar is inserted into the guide groove.
  • the beneficial effect of the present invention is that the present invention changes the original feedback barrel in the injection pen to the current feedback assembly.
  • the feedback assembly is composed of the upper feedback barrel, the feedback connecting barrel and the feedback gear ring.
  • the three components are linked to beating, achieving the same effect as the original structure.
  • the reversal is used for callback, only the upper feedback tube and the feedback connecting tube perform linkage bounce.
  • the dialing feedback is stable, and the internal parts will not follow the rotation. , It can avoid the inaccurate injection volume caused by the follow-up, and greatly reduce the potential safety hazards.
  • Figure 1 is a three-dimensional schematic diagram of the injection pen of the present invention.
  • Figure 2 is a schematic cross-sectional view of the injection pen of the present invention.
  • Figure 3 is a schematic diagram of the structure of the housing and the feedback component
  • Figure 4 is a schematic diagram of the structure of the scale cylinder, the fixed bracket push rod and the rotating cylinder;
  • Figure 5 is a schematic diagram of the structure of the push cylinder, the screw and the medicine bin;
  • Figure 6 is a three-dimensional schematic diagram of the feedback component of the present invention.
  • Figure 7 is a schematic cross-sectional view of the feedback component of the present invention.
  • Fig. 8 is a three-dimensional schematic diagram of the fixing seat in the present invention.
  • Figure 9 is a three-dimensional schematic diagram of the button in the present invention.
  • Figure 10 is a schematic cross-sectional view of the fixing bracket of the present invention.
  • the labels are as follows: medicine warehouse 100; discharge port 110; bayonet 120; medicine bottle 130; screw 200; push piston 210; push rod drum 300; button 310; push cylinder 400; linkage ring 410; fixed bracket 500; Internal thread 510; feedback assembly 600; upper feedback barrel 610; spring placement groove 611; compression spring 612; feedback connecting barrel 620; feedback gear ring 630; feedback gear ring 640; scale barrel 700; pen barrel 800; pen cap 810; Block 820; fixed seat 900; limiting rib 910.
  • the terms “installed”, “connected”, and “connected” should be understood in a broad sense, for example, they may be fixed connections or detachable connections. , Or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • installed e.g., they may be fixed connections or detachable connections. , Or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • a feedback assembly includes an upper feedback cylinder 610, a feedback connecting cylinder 620, and a feedback gear ring 630.
  • the lower part of the upper feedback cylinder 610 is opposed to the upper part of the feedback connecting cylinder 620, and the feedback
  • the side of the connecting cylinder 620 close to the feedback ring gear 639 has a feedback ring gear 640, both sides of the feedback ring gear 630 have a feedback ring gear 640, and the feedback ring gear 630 on the corresponding side is connected to the feedback ring gear 620.
  • the feedback ring gear 630 cooperates.
  • the upper feedback cylinder 610 has a spring placement groove 611, and a compression spring 612 is installed in the placement groove.
  • the compression spring 612 always gives the feedback assembly 600 a downward thrust to ensure that the lower feedback tooth The meshing of the ring 640.
  • an injection pen including the feedback assembly, further includes: a medicine bin 100, which is provided with at least one discharge port 110; a screw 200, which is configured to be movable in a linear direction to The material in the medicine bin 100 is pushed out from the discharge port 110; the push rod drum 300 is configured to move back and forth toward or away from the medicine bin 100; the push cylinder 400 has a linkage dial Ring 410; wherein, the push cylinder 400 is configured to drive the linkage ring 410 to rotate in a first direction when the push rod drum 300 moves toward the direction of the medicine compartment 100, the linkage ring 410 It is configured to drive the screw 200 to move in the linear direction when rotating in the first direction, and further includes a fixing bracket 500.
  • the outer wall of the push rod drum 300 and the inner wall of the fixing bracket 500 are connected by threads.
  • the inner wall of the push rod drum 300 is in transmission connection with the push drum 400 through a feedback assembly 600.
  • the feedback assembly 600 is located between the push drum 400 and the push rod drum 300.
  • the feedback connecting drum 620 is close to
  • the feedback ring gear 630 side has a feedback ring gear 640, and the inner wall of the push rod drum 300 has an inner ring gear.
  • FIG. 1 and 4 it also includes a scale cylinder 700 sleeved on the push rod drum 300, the scale cylinder 700 is connected to the push rod drum 300, and the outer wall of the scale cylinder 700 is provided with Scale.
  • the medicine compartment 100 is fixedly connected to one end of the pen body tube 800, and an observation hole is opened at one end of the pen body tube 800 away from the medicine compartment 100.
  • One end is fitted with a pen cap 810, and the medicine bottle 130 is first put into the medicine container 100 during use, and then the medicine container 100 is fixed on the pen barrel 800.
  • the medicine compartment 100 has a bayonet
  • the inner wall of the pen barrel 800 has a detent 820 corresponding to the bayonet 120.
  • the medicine compartment 100 and the pen barrel 800 were fixed by a convex In the way of ribs and slots, the ribs are inserted along the slot and then rotated to achieve locking, but this connection is unstable and slightly shakes during use, which affects the patient's injection.
  • FIG. 5 there is also a fixing seat 900 which is matched with the linkage ring 410.
  • the screw 200 passes through the fixing seat 900 and is equipped with a pushing piston 210 at its end.
  • the fixing seat 900 was only fixed by a tight fit and used for a period of time.
  • the rear fixing seat 900 is easy to loosen and shakes, which greatly affects the patient's use experience.
  • the push rod drum 300 is connected with a button 310 at one end far away from the medicine compartment 100.
  • the button 310 can be retracted into the push rod drum 300.
  • the lower part of the button 310 There is a ring-shaped card table at the connection point, which can clamp the button 310 when the button 310 is in the pulled-out state.
  • the inner wall of the feedback connecting cylinder 620 has a guide bar 621
  • the outer wall of the push cylinder 400 has a guide groove corresponding to the guide bar 621, and the guide bar 621 is inserted into the guide bar 621.
  • the guide bar 621 and the guide groove are arranged to ensure that the feedback assembly 600 and the push cylinder 400 will not rotate relative to each other.
  • the cross section of the teeth on the feedback ring gear 640 is a right triangle, so that the slope of one side slope of the tooth is much greater than the other side slope.
  • the teeth on the adjacent feedback ring gear 640 are formed by Disengagement to re-engagement is to slide directly along the right-angled edge, and the sound produced by the impact is more obvious.
  • the inner wall surface of the fixing bracket 500 is provided with internal threads 510.
  • threads are generally provided on the outer circumference of the scale cylinder 700, so that the scale cylinder 700 can be screwed in and out, but in actual use Since the scale cylinder 700 is unscrewed, dust may fall into the thread, which hinders the injection and affects the accuracy of the injection dose, which has a great safety hazard.
  • the screw is arranged in the scale cylinder 700 in this patent, it can greatly Avoid ingress of dust.

Abstract

L'invention concerne un stylo d'injection jetable et un ensemble de rétroaction associé ; l'ensemble de rétroaction comprend un cylindre de rétroaction supérieur (610), un cylindre de liaison de rétroaction (620) et un anneau d'engrenage de rétroaction (630) ; l'ensemble de rétroaction est situé entre un cylindre de poussée (400) et un cylindre rotatif de tige-poussoir (300) ; le cylindre de liaison de rétroaction (620) a une couronne de rétroaction (640) sur le côté proche de l'anneau d'engrenage de rétroaction (630) ; les deux côtés de l'anneau d'engrenage de rétroaction (630) comportent une couronne de rétroaction (640) ; la paroi interne du cylindre de tige-poussoir (300) a une couronne interne ; lorsque l'anneau d'engrenage de rétroaction (630) se déplace le long de sa direction axiale, l'anneau d'engrenage de rétroaction (640) latéral correspondant vient en prise avec la couronne interne ou se sépare de celle-ci, et la couronne de rétroaction (640) sur l'autre côté de l'anneau d'engrenage de rétroaction (630) vient en prise avec la couronne de rétroaction (640) ou se sépare de celle-ci sur le cylindre de liaison de rétroaction (620) ; la paroi interne du cylindre de liaison de rétroaction (620) et la paroi externe du cylindre de poussée (400) sont reliées de manière coulissante au moyen d'une structure concave-convexe. Les trois parties du stylo d'injection jetable et l'ensemble de rétroaction associé sautent conjointement lorsqu'ils sont ajustés à une grande échelle, obtenant le même effet que la structure d'origine ; lorsqu'une rotation inverse pour l'ajustement arrière est effectuée, seul le cylindre de rétroaction supérieur (610) et le cylindre de liaison de rétroaction (620) dans la partie supérieure effectuent un saut ensemble ; la rétroaction de mouvement latéral est stable, aucune rotation de suivi des parties internes ne se produit, et un volume d'injection inexact provoqué par la rotation de suivi est évité, réduisant considérablement les risques de sécurité.
PCT/CN2019/119045 2019-11-08 2019-11-18 Stylo d'injection jetable WO2021088115A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911087129.XA CN110772687A (zh) 2019-11-08 2019-11-08 一次性注射笔
CN201911087129.X 2019-11-08

Publications (1)

Publication Number Publication Date
WO2021088115A1 true WO2021088115A1 (fr) 2021-05-14

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Application Number Title Priority Date Filing Date
PCT/CN2019/119045 WO2021088115A1 (fr) 2019-11-08 2019-11-18 Stylo d'injection jetable

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CN (1) CN110772687A (fr)
WO (1) WO2021088115A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114534021B (zh) * 2022-04-25 2022-08-16 江苏万海医疗器械有限公司 定量液体物料输送装置及其工作方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201324413Y (zh) * 2008-07-09 2009-10-14 邓源基 定量可调笔式注射器
GB2530076A (en) * 2014-09-12 2016-03-16 Shaily Medical Plastics Private Ltd Injector pens
CN105477745A (zh) * 2015-06-11 2016-04-13 江苏德尔福医疗器械有限公司 一种可调剂量的多次重复使用的注射笔
CN106215284A (zh) * 2016-07-07 2016-12-14 邓源基 笔式注射器的离合机构
CN206081230U (zh) * 2016-07-07 2017-04-12 邓源基 笔式注射器的离合机构
CN107308523A (zh) * 2017-08-08 2017-11-03 甘肃成纪生物药业有限公司 微调注射笔
CN109395205A (zh) * 2018-11-12 2019-03-01 江苏万海医疗器械有限公司 注射装置及注射装置组件
WO2019072826A1 (fr) * 2017-10-10 2019-04-18 Novo Nordisk A/S Dispositif d'administration de médicament prérempli avec intervalle d'air réduit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201324413Y (zh) * 2008-07-09 2009-10-14 邓源基 定量可调笔式注射器
GB2530076A (en) * 2014-09-12 2016-03-16 Shaily Medical Plastics Private Ltd Injector pens
CN105477745A (zh) * 2015-06-11 2016-04-13 江苏德尔福医疗器械有限公司 一种可调剂量的多次重复使用的注射笔
CN106215284A (zh) * 2016-07-07 2016-12-14 邓源基 笔式注射器的离合机构
CN206081230U (zh) * 2016-07-07 2017-04-12 邓源基 笔式注射器的离合机构
CN107308523A (zh) * 2017-08-08 2017-11-03 甘肃成纪生物药业有限公司 微调注射笔
WO2019072826A1 (fr) * 2017-10-10 2019-04-18 Novo Nordisk A/S Dispositif d'administration de médicament prérempli avec intervalle d'air réduit
CN109395205A (zh) * 2018-11-12 2019-03-01 江苏万海医疗器械有限公司 注射装置及注射装置组件

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