WO2022232978A1 - Seringue de prévention contre les piqûres d'aiguille - Google Patents

Seringue de prévention contre les piqûres d'aiguille Download PDF

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Publication number
WO2022232978A1
WO2022232978A1 PCT/CN2021/091851 CN2021091851W WO2022232978A1 WO 2022232978 A1 WO2022232978 A1 WO 2022232978A1 CN 2021091851 W CN2021091851 W CN 2021091851W WO 2022232978 A1 WO2022232978 A1 WO 2022232978A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
rotating sheath
seat
rotating
injection cavity
Prior art date
Application number
PCT/CN2021/091851
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English (en)
Chinese (zh)
Inventor
毛春元
毛亚凌
Original Assignee
上海金塔医用器材有限公司
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 上海金塔医用器材有限公司 filed Critical 上海金塔医用器材有限公司
Priority to PCT/CN2021/091851 priority Critical patent/WO2022232978A1/fr
Publication of WO2022232978A1 publication Critical patent/WO2022232978A1/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
    • 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

Definitions

  • the invention relates to an anti-needle-stick syringe.
  • the commonly used non-disposable syringes need to be covered with a needle cover to protect the needle after use. Because the needle is very thin and the diameter of the needle cover is not large, it is easy to stab the fingers and cause medical problems. Serious consequences such as human infection.
  • some existing syringes use a needle with its own protective sheath, which is mounted on the barrel through a needle seat. After the injection is complete, slide the protective cover over the needle hub out and shield the needle. In this way, although the needle can be effectively protected and the medical staff can be prevented from being stabbed, when a small dose of medicine is injected, there is a lot of residual medicine at the front end of the syringe with its own protective sleeve and needle seat, which cannot accurately control the dose, which is not effective for treatment. The effect is huge.
  • the technical problem to be solved by the present invention is to provide an anti-needle-stick syringe in order to overcome the defect of the prior art that when a small dose of medicine is injected, there are many residual medicines at the front end of the needle seat and the syringe barrel, and the dosage cannot be accurately controlled.
  • An anti-needle-stick syringe comprising a needle barrel, a needle head and a needle seat, the inside of the barrel is an injection cavity, the needle seat is installed at the front end of the needle barrel, and is characterized in that a rotary A sheath, the rotating sheath is rotated to a side close to the needle barrel in an open position, and is rotated to the needle head in a protective position and protects the needle head in the rotating sheath, and the needle head is The tail end passes through the needle seat and continues to extend to the injection cavity and communicates with the injection cavity.
  • the above-mentioned structural form is adopted, so that the needle passes through the needle seat and is directly communicated with the injection cavity during the injection process, which greatly reduces the drug residue in the syringe.
  • the front end of the syringe has a mounting seat and a communication hole communicating with the injection cavity, the needle seat is inserted into the mounting seat, and the needle is aligned and inserted into the communication hole.
  • the use of the mounting seat to dock with the needle seat replaces the conical mouth of the traditional syringe, further reducing the drug residue in the syringe.
  • the inner wall of the front end of the injection cavity is a conical surface that protrudes forward
  • the syringe further includes a push rod located in the injection cavity, and the front end surface of the push rod is connected to the injection cavity. Match with the inner wall of the front end.
  • the communication hole is located at the top of the conical surface, and the conical surface extends obliquely from the periphery to the communication hole. As a result, it is easier for the drug to converge to the communication hole, so as to be injected through the needle.
  • the drug residual space in the anti-needle-stick syringe is jointly surrounded by the side wall of the communication hole, the bottom surface of the needle seat and the front end surface of the push rod. Therefore, the drug residual space in the needle stick-proof syringe is further reduced, so as to reduce the drug residual space.
  • the side of the rotating sheath facing the needle has a needle limiting member, and a needle limiting space is formed between the needle limiting member and the inner wall of the rotating sheath, and the rotating sheath rotates.
  • the needle head enters the limiting space through the needle limiting member, and is limited in the limiting space by the limiting member.
  • the needle stopper can prevent the needle from entering the limiting space or avoid being detached again, thereby ensuring that after the needle is used, the rotating sheath can always cover the needle, avoiding the accidental exposure of the needle and the risk of stabbing the medical staff.
  • an angle is formed between the needle stopper and the inner wall of the rotating sheath, the opening side of the angle faces the side away from the needle, and the rotating sheath rotates to the protection position.
  • the needle head slides into the limiting space along the outer surface of the needle limiting member.
  • the downwardly set included angle can ensure that the needle head can smoothly slide into the limiting space, and on the other hand, the needle head can be restricted on both sides of the included angle to prevent the needle head from coming out.
  • a plurality of protruding ribs are formed on the inner wall of the rotating sheath, the protruding ribs extend along the length direction of the rotating sheath, and the limiting space is formed between the protruding ribs and the limiting member. between.
  • the protruding ribs can contact the needle head in a raised manner, so as to provide support between the inner wall of the rotating sheath and the needle head, and prevent the needle head from breaking after being impacted.
  • a through adjustment notch is formed on the inner wall of the rotating sheath, and the adjustment notch communicates with the limiting space.
  • the adjustment notch facilitates external tool access to move the needle out of the detent space, thereby providing a return function in the event of interoperability to open the swivel sheath to the swivel position.
  • the rear end of the rotating sheath has a limit clip, and when the rotating sheath rotates to the end of the open position and/or the protection position, the limit clip will jam the needle. seat to prevent the needle seat from continuing to rotate towards the side away from and/or closer to the needle.
  • the limit clip can prevent the rotating sheath from moving beyond the open position and/or the protection position, and ensure that the rotating sheath can be kept in the normal use range.
  • the needle seat has a stepped front stepped surface and a rear stepped surface, and when the rotating sheath is rotated to the end of the open position, the limit clip is stuck on the front stepped surface, And/or when the rotating sheath rotates to the end of the protection position, the limiting clip catches the rear stepped surface.
  • the front stepped surface and the rear stepped surface respectively serve to limit the different limit positions of the rotating sheath, so that the limit of the rotating sheath can be completed through one needle seat.
  • the injection cavity is pre-filled with drugs.
  • the positive improvement effect of the present invention is that: the needle stick of the present invention is arranged to pass through the needle seat, and the needle is directly communicated with the injection cavity during the injection process, which greatly reduces the drug residue in the syringe and can accurately control the dose.
  • FIG. 1 is a perspective view of a needle stick-proof syringe according to a preferred embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of the rotating sheath in the open position according to the preferred embodiment of the present invention.
  • FIG. 3 is a schematic view of the structure of the rotating sheath in the protection position according to the preferred embodiment of the present invention.
  • FIG. 4 is a partial cross-sectional view of the needle stick-proof syringe according to the preferred embodiment of the present invention.
  • FIG. 5 is a schematic three-dimensional structural diagram of the connection between the injection cavity and the needle according to the preferred embodiment of the present invention.
  • FIG. 6 is a schematic plan view of the connection between the injection cavity and the needle according to the preferred embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a needle hub according to a preferred embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a mounting seat according to a preferred embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of the engagement between the rotating sheath and the needle seat according to the preferred embodiment of the present invention.
  • FIG. 10 is a schematic diagram of the inner side structure of the rotating sheath according to the preferred embodiment of the present invention.
  • FIG. 11 is a schematic plan view of the rotating sheath according to the preferred embodiment of the present invention.
  • FIG. 12 is a schematic cross-sectional view along the line A-A in FIG. 11 .
  • this embodiment provides an anti-needle stick syringe 100 , which includes a syringe 110 , a needle 3 and a needle seat 2 .
  • the inside of the syringe 110 is an injection cavity 120
  • the needle seat 2 is installed at the front end of the syringe 110 .
  • the tail end of the needle 3 passes through the needle base 2 and continues to extend to the injection cavity 120 , and communicates with the injection cavity 120 .
  • a rotating sheath 4 is rotatably connected to the outside of the needle base 2 in this embodiment.
  • the rotating sheath 4 rotates to the side close to the needle cylinder in an open position, and rotates to the needle head 3 in a protective position. And protect the needle 3 in the rotating sheath 4.
  • the rotating sheath 4 is connected with the rotating shaft 20 on the needle seat 2 through the rotating clamping slot 40 .
  • the drug usually remains in the conical opening at the front end of the injection cavity 120 and the inner space of the needle seat 2, especially when the small dose is injected, the error is large, which may reduce the injection volume of the drug.
  • the medicine in the injection cavity 120 directly enters the needle 3 from the front end of the injection cavity 120, and then enters the human body. Since the cone mouth is eliminated and the needle 3 is directly communicated with the injection cavity 120 , the space for the drug residue is minimized, and the drug residue in the syringe 110 after the injection is completed can be significantly reduced.
  • the front end of the syringe 110 has a mounting seat 130 and a communication hole 140 communicating with the injection cavity 120 , the needle seat 2 is inserted into the mounting seat 130 , the needle 3 Aligned and connected to the communication hole 140 .
  • the mounting seat 130 is integrally formed with the syringe 110 .
  • the bottom surface 22 of the needle hub 2 is matched with the inner plane of the mounting seat 130 , and both are planes and are in close contact with each other.
  • the position of the reserved hole 21 for accommodating the needle 3 in the needle seat 2 coincides with the position of the communication hole 140 in the mounting seat 130, so as to ensure that the needle 3 can smoothly enter the communication hole after passing through the needle seat 2 140.
  • the inner diameter of the communication hole 140 is larger than the outer diameter of the needle 3 .
  • the reserved hole 21 and the communication hole 140 are arranged concentrically.
  • the communication hole 140 is arranged in the center of the mounting seat 130 , and the reserved hole 21 is arranged in the center of the needle seat 2 , so that the reserved hole 21 and the communication hole 140 are realized when the needle seat 2 is installed on the mounting seat 130 . automatic alignment.
  • a matching structure such as a concave-convex key or a bayonet, is provided between the needle seat 2 and the mounting seat 130 to realize the preciseness of the reserved hole 21 and the communication hole 140 position. After the needle seat 2 and the mounting seat 130 are inserted at a fixed angle, the reserved hole 21 and the communication hole 140 will be automatically aligned.
  • the needle hub 2 is mounted on the mounting seat 130, while in other embodiments of the present invention, the needle hub 2 can be integrally formed with the mounting seat 130, that is to say, the bottom of the needle hub 2 has a structure similar to that of the mounting seat 130. part of the seat 130, and through which it is integrally formed with the syringe 110.
  • Those skilled in the art can also improve the existing conical structure of the front end of the syringe, and make the conical structure of the front end of the syringe and the needle seat 2 integrally formed in the manufacturing process, so as to achieve the effect of reducing the number of parts and simplifying the overall structure , which indirectly reduces the assembly difficulty and improves the manufacturing efficiency.
  • the inner wall of the front end of the injection cavity 120 is a tapered surface 150 that protrudes forward
  • the syringe 110 further includes a push rod 160 located in the injection cavity 120
  • the push rod 160 further includes a rubber plug 161 fixed to the front end of the push rod 160 .
  • the front end surface of the rubber plug 161 is matched with the inner wall of the front end of the injection cavity 120 .
  • the communication hole 140 is located at the top of the conical surface 150 , and the conical surface 150 extends obliquely toward the communication hole 140 from the periphery.
  • the front end of the syringe 110 forms the inner plane of the mounting seat 130, and the inner wall of the front end of the injection cavity 120 is the tapered surface 150, the front end wall thickness of the syringe 110 is changed from the conventional wall thickness around the center to the middle. The thickness is gradually reduced until a communication hole 140 is formed in the middle.
  • the volume of the communication hole 140 is proportional to the square of the hole diameter and to the hole depth, within a certain angle range, the top of the conical surface 150 The angle must be able to take an extreme value, so that the volume of the communication hole 140 can take the minimum value, so that the residual amount of the medicine in the syringe can take the minimum value.
  • the medicine is more likely to be collected at the communication hole 140 .
  • a rubber plug 161 conforming to the tapered surface 150 is used.
  • the front end surface of the rubber stopper 161 can fit with the tapered surface 150 , so that the medicine in the injection cavity 120 can be pushed out smoothly, and then the injection can be completed through the needle 3 into the body.
  • the medicine in the anti-needle stick syringe 100 mainly remains in the communication hole 140 and the needle 3 .
  • the inner diameter of the needle 3 is extremely small and can be ignored.
  • the space in the communication hole 140 is jointly enclosed by the side walls 141 around the communication hole 140 , the bottom surface 22 of the needle seat 2 and the central area of the front end surface of the push rod 160 . Since the push rod 160 includes the rubber plug 161 at the front end, the central area of the front end surface of the rubber plug 161 protrudes a small distance, so the space in the communication hole 140 is approximately a cylindrical shape, and its volume is approximately equal to a quarter of the hole The product of the depth and the square of the aperture.
  • the hole depth is equal to the wall thickness of the front end of the syringe 110 minus the distance that the tapered surface 150 protrudes forward, wherein the wall thickness of the front end of the syringe 110 itself is thinner, minus a certain distance
  • the hole depth of the communication hole 140 is the hole depth of the communication hole 140 .
  • the needle 3 is inserted into the communication hole 140 for a certain distance, so that the part of the communication hole 140 closest to the needle 3 cannot be filled with the medicine.
  • the diameter of the communication hole 140 is slightly larger than the outer diameter of the needle 3 without considering the influence of assembly error and processing tolerance. Even so, since the outer diameter of the needle 3 is small, although the diameter of the communication hole 140 is slightly larger than the outer diameter of the needle 3, it is still small.
  • the tail end of the needle 3 is inserted into the communication hole 140 for a certain distance. Due to the surface tension of the liquid, the medicine in the injection cavity 120 will directly enter the needle 3, so that the volume occupied by the residual medicine is further reduced.
  • the residual drug can be controlled at a very low level, and the proportion of the total dose can be almost ignored, that is, Almost no effect on the effectiveness of the treatment.
  • the total residual medicine volume inside the anti-needle stick syringe 100 is very small.
  • the diameter of the communication hole 140 is slightly larger than the outer diameter of the needle 3 so that the tail end of the needle 3 can be inserted into the communication hole 140 .
  • the present invention is not limited to this, and the present invention also has various arrangement manners for making the tail end of the needle 3 communicate with the injection cavity 120 directly.
  • the diameter of the communication hole 140 is set to be the same as the inner diameter of the needle 3 .
  • the space for the drug residue is only a section of cylinder with the same diameter as the inner diameter of the needle 3, and the drug residue can be ignored.
  • the mounting seat 130 has an accommodating cavity inside, and an inwardly inclined guide surface 131 is provided at the opening of the accommodating cavity, and the guiding surface 131 is used to guide the needle hub 2 to be inserted into the accommodating cavity.
  • the accommodating cavity in the mounting seat 130 and the needle seat 2 are both cylindrical.
  • the diameter of the opening at the upper end of the mounting seat 130 is larger than the diameter of the needle seat 2 , and the opening is inclined and contracted inward to form the guide surface 131 .
  • the needle hub 2 there is also a guide structure with a similar shape for guiding the needle head 3 to be inserted into the needle hub 2.
  • the diameter of the opening at the upper end of the needle seat 2 is larger than the diameter of the needle head 3 , and the opening is inclined and contracted inwardly to form a guide surface 131 . In this way, the difficulty of installing the needle 3 is greatly reduced, thereby saving the operation time of assembly.
  • the side of the rotating sheath 4 facing the needle head 3 has a needle stopper 41 , and a needle head is formed between the needle stopper 41 and the inner wall of the rotating sheath 4 3 Limiting space B.
  • the needle 3 enters the limiting space B through the needle limiting member 41 and is limited in the limiting space B by the limiting member.
  • the needle stopper 41 can prevent the needle 3 from entering the limiting space B or prevent it from disengaging again, thereby ensuring that after the needle 3 is used, the rotating sheath 4 can always cover the needle 3 to avoid accidental exposure of the needle 3, which may cause harm to medical staff. Risk of stabbing.
  • an angle C is formed between the needle stopper 41 and the inner wall of the rotating sheath 4, and the opening side of the angle C faces the side away from the needle 3, During the process of rotating the rotating sheath 4 to the protection position, the needle 3 slides into the limiting space B along the outer surface of the needle limiting member 41 .
  • the downwardly set angle C can ensure that the needle 3 can smoothly slide into the limiting space B on the one hand, and can also limit the needle 3 on both sides of the angle to prevent the needle 3 from coming out.
  • a plurality of protruding ribs 42 are formed on the inner wall of the rotating sheath 4 , the protruding ribs 42 extend along the length direction of the rotating sheath 4 , and the limiting space B is formed between the rib 42 and the limiting member.
  • the protruding ribs 42 can be in contact with the needle head 3 by means of cushioning, so as to provide support between the inner wall of the rotating sheath 4 and the needle head 3 to prevent the needle head 3 from breaking after being impacted.
  • the inner wall of the rotating sheath 4 is formed with a through adjustment notch 43 , and the adjustment notch 43 communicates with the limiting space B.
  • the adjustment notch 43 facilitates the movement of the needle 3 out of the limiting space B through the entry of an external tool, thereby providing a recovery function under the condition that the rotating sheath 4 is opened to the rotating position by interoperability.
  • the rear end of the rotating sheath 4 has a limit clip 44.
  • the limiting clip 44 clamps the needle holder 2 to prevent the needle holder 2 from continuing to rotate toward the side away from and/or close to the needle head 3 .
  • the limiting clip 44 can prevent the rotating sheath 4 from moving beyond the open position and/or the protection position, and ensure that the rotating sheath 4 can be kept in the normal use range.
  • the needle hub 2 has a stepped front stepped surface 201 and a rear stepped surface 202.
  • the limit When the rotating sheath 4 rotates to the end of the open position, the limit When the clamping piece 44 clamps the front stepped surface 201 , and/or when the rotating sheath 4 rotates to the end of the protection position, the limiting clamping piece 44 clamps the rear stepped surface 202 .
  • the front stepped surface 201 and the rear stepped surface 202 respectively serve to limit the different extreme positions of the rotating sheath 4 , so that the rotating sheath 4 can be limited by one needle holder 2 .
  • the injection cavity 120 in this embodiment is pre-filled with medicine. Prefilled doses are precisely controlled by the machine and ready for immediate use without refilling the drug. Specifically, for use scenarios that require precise control of drug doses, such as small-dose injection, it is more accurate to use large precision instruments for drug preloading. In this embodiment, in combination with the feature of the anti-needle stick syringe 100 that there is very little drug residue, it is convenient for medical staff to precisely control the injected drug dose.

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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)

Abstract

L'invention concerne une seringue de prévention contre les piqûres d'aiguille (100), comprenant un cylindre (110), une aiguille (3) et une base d'aiguille (2). L'intérieur du cylindre (110) est une cavité d'injection (120) ; la base d'aiguille (2) est montée à l'extrémité avant du cylindre (110) ; une gaine rotative (4) est reliée de manière rotative au côté extérieur de la base d'aiguille (2) ; la gaine rotative (4) est tournée vers le côté proche du cylindre (110) dans une position ouverte, et est tournée vers l'aiguille (3) dans une position de protection pour protéger l'aiguille (3) dans la gaine rotative (4) ; l'extrémité arrière de l'aiguille (3) passe à travers la base d'aiguille (2) et s'étend en continu vers la cavité d'injection (120) pour être en communication avec la cavité d'injection (120). Selon la seringue de prévention contre les piqûres d'aiguilles (100), l'aiguille (3) est conçue pour passer à travers la base d'aiguille (2), et l'aiguille (3) est directement en communication avec la cavité d'injection (120) pendant l'injection ; ainsi, le résidu de médicament dans le cylindre (110) est réduit et le dosage peut être commandé avec précision.
PCT/CN2021/091851 2021-05-06 2021-05-06 Seringue de prévention contre les piqûres d'aiguille WO2022232978A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/091851 WO2022232978A1 (fr) 2021-05-06 2021-05-06 Seringue de prévention contre les piqûres d'aiguille

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/091851 WO2022232978A1 (fr) 2021-05-06 2021-05-06 Seringue de prévention contre les piqûres d'aiguille

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WO2022232978A1 true WO2022232978A1 (fr) 2022-11-10

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080097336A1 (en) * 2006-06-13 2008-04-24 Linfair Engineering (Hk) Co., Ltd. Needle protective device
CN101687083A (zh) * 2007-02-26 2010-03-31 贝克顿·迪金森公司 具有铰接的针护套的注射器
CN203196091U (zh) * 2013-03-12 2013-09-18 淮安市恒春医疗器材有限公司 带针头保护装置的安全注射器
CN105816941A (zh) * 2015-01-04 2016-08-03 上海金塔医用器材有限公司 防针刺注射器
CN209316712U (zh) * 2018-08-09 2019-08-30 四川省肿瘤医院 一种防针刺伤及针头脱落的注射器
CN211024539U (zh) * 2019-05-31 2020-07-17 安徽宏宇五洲医疗器械股份有限公司 一种防针刺胰岛素注射器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080097336A1 (en) * 2006-06-13 2008-04-24 Linfair Engineering (Hk) Co., Ltd. Needle protective device
CN101687083A (zh) * 2007-02-26 2010-03-31 贝克顿·迪金森公司 具有铰接的针护套的注射器
CN203196091U (zh) * 2013-03-12 2013-09-18 淮安市恒春医疗器材有限公司 带针头保护装置的安全注射器
CN105816941A (zh) * 2015-01-04 2016-08-03 上海金塔医用器材有限公司 防针刺注射器
CN209316712U (zh) * 2018-08-09 2019-08-30 四川省肿瘤医院 一种防针刺伤及针头脱落的注射器
CN211024539U (zh) * 2019-05-31 2020-07-17 安徽宏宇五洲医疗器械股份有限公司 一种防针刺胰岛素注射器

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