WO2003045476A1 - Seringue de securite - Google Patents

Seringue de securite Download PDF

Info

Publication number
WO2003045476A1
WO2003045476A1 PCT/KR2001/002064 KR0102064W WO03045476A1 WO 2003045476 A1 WO2003045476 A1 WO 2003045476A1 KR 0102064 W KR0102064 W KR 0102064W WO 03045476 A1 WO03045476 A1 WO 03045476A1
Authority
WO
WIPO (PCT)
Prior art keywords
adapter
cylinder
plunger
safety syringe
cavity
Prior art date
Application number
PCT/KR2001/002064
Other languages
English (en)
Inventor
Geo Seong Pok
Original Assignee
Geo Seong Pok
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 Geo Seong Pok filed Critical Geo Seong Pok
Priority to AU2002221167A priority Critical patent/AU2002221167A1/en
Publication of WO2003045476A1 publication Critical patent/WO2003045476A1/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    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston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
    • A61M2005/3223—Means impeding or disabling repositioning of used needles at the syringe nozzle
    • A61M2005/3224—Means to disalign the needle tip and syringe nozzle

Definitions

  • the present invention relates to a syringe, and more particularly, the present invention relates to a safety syringe which is constructed in such a way as to allow an injection needle to be withdrawn into a cylinder and then collapsed after injection of liquid medicine, thereby preventing reuse of the syringe, protecting medical personnel and others from being stuck by the injection needle after completion of injection, and avoiding a safety-related accident.
  • a conventional safety syringe includes an elongate cylinder, an adapter, an injection needle and a plunger.
  • the cylinder defines a space in which injection liquid is accommodated and has a neck part which is projectedly formed on an upper end of the cylinder.
  • the adapter is vertically fitted into the neck part of the cylinder, with a sealing ring interposed between the adapter and the neck part.
  • the injection needle is fitted through an upper end of the adapter.
  • the plunger is inserted into the cylinder so that it can be moved upward and downward. The plunger functions to suck injection liquid into the cylinder and discharge injection liquid accommodated in the cylinder to the outside.
  • a projection is formed on an upper end surface of the plunger to extend upward while having a central axis which corresponds to that of the cylinder.
  • the projection is formed, at an upper end thereof, with an arrow-shaped head portion.
  • the adapter is formed with a socket part which is eccentrically positioned from the central axis of the cylinder and into which the arrow-shaped head portion of the projection is fitted. If the plunger is fully pushed into the cylinder, as injection of liquid medicine is completed, the arrow-shaped head portion of the projection, which is formed on the upper end surface of the plunger, is fitted into and thereby coupled to the socket part of the adapter.
  • the conventional safety syringe constructed as mentioned above suffers from defects in that, since the injection needle is fitted through the upper end of the neck part of the cylinder in such a way as to be moved upward and downward along a straight path, if force of no less than a predetermined magnitude is applied to the injection needle, the injection needle is fluctuated, whereby it is difficult to prick the injection needle at a precise position into the human body. Also, because the arrow-shaped head portion of the projection formed on the upper end surface of the plunger has a complicated configuration and the adapter should be formed with the socket part into which the arrow-shaped head portion of the projection is fitted, a manufacturing cost of the safety syringe is increased.
  • the adapter is coupled to the neck part of the cylinder with excessively large force, when the plunger is pulled out of the cylinder, the arrow-shaped head portion of the projection is disengaged from the socket part of the adapter, whereby the adapter and the injection needle cannot be withdrawn into the cylinder.
  • an object of the present invention is to provide a safety syringe in which an injection needle is rigidly coupled to a cylinder, whereby the injection needle is prevented from being fluctuated during injection of liquid medicine and is allowed to be withdrawn into the cylinder through simple manipulation and then collapsed, after completion of injection.
  • Another object of the present invention is to provide a safety syringe which does not apply any shock to the human body at the time when injection of liquid medicine is completed, as in the conventional syringe .
  • a safety syringe comprising: a cylinder defining a space for accommodating injection liquid and having a neck part projectedly formed on a center portion of an upper end thereof; an adapter coupled to the neck part of the cylinder; an injection needle connected to an upper end of the adapter; and a plunger inserted into the cylinder so that it can be moved upward and downward, for discharging the injection liquid accommodated in the cylinder, through the adapter and the injection needle to the outside; wherein a rod vertically projects from an upper end surface of the plunger in such a way as to be eccentrically positioned from a central axis of the cylinder, and an upper end of the rod is formed with a hook part; and wherein the adapter is defined with a cavity into which the rod can be inserted, an inner surface of the adapter which defines the cavity is formed as an inclined surface so that the upper end of the rod can be brought into contact with the inner surface of the adapter and thereby
  • the coupling means comprises grooves which are vertically defined adjacent to a lower end of the adapter, and projections which are vertically formed on the upper end surface of the plunger to be inserted into the grooves of the adapter.
  • the projections formed on the upper end surface of the plunger are engaged into the grooves defined in the adapter, and the upper end of the rod is inserted into the cavity of the adapter while being brought into contact with the inner surface of the adapter and thereby bent inward toward the central axis of the adapter.
  • the hook part formed on the upper end of the rod is positioned above the hook engaging portion formed at a location corresponding to the middle of the cavity.
  • the adapter As the adapter is unthreaded from the neck part of the cylinder, the adapter is retracted into the cylinder. Then, by pulling the plunger out of the cylinder, as the hook part of the rod formed on the plunger is engaged with the hook engaging portion of the adapter, the adapter and the injection needle are withdrawn into the cylinder. At this time, as the rod, which is bent inward toward the central axis of the adapter, is unbent to extend in a vertical direction, the rod biases the adapter, whereby the adapter and the injection needle are inclined sideways in the cylinder. In this state, by pushing again the plunger into the cylinder, the injection needle is collapsed against an inner surface of the cylinder.
  • FIG. 1 is a cross-sectional view illustrating a safety syringe in accordance with an embodiment of the present invention
  • FIG. 2 is an exploded perspective view of the safety syringe shown in FIG. 1
  • FIG. 3 is an enlarged cross-sectional view illustrating an adapter and an upper end of a plunger which constitute the safety syringe shown in FIG. 1;
  • FIG. 4 is a cross-sectional view taken along the line B-B of FIG. 3;
  • FIG. 5 is a cross-sectional view taken along the line C-C of FIG. 3;
  • FIG. 8 is an enlarged cross-sectional view illustrating a state wherein the adapter and the upper end of the plunger shown in FIG. 7 are coupled with each other;
  • FIG. 9 is a cross-sectional view of the safety syringe according to the present invention, illustrating, a state wherein an injection needle assembly is withdrawn into a cylinder;
  • FIG. 10 is a cross-sectional view of the safety syringe according to the present invention, illustrating a state wherein an injection needle withdrawn into the cylinder is collapsed.
  • FIG. 1 is a cross-sectional view illustrating a safety syringe in accordance with an embodiment of the present invention
  • FIG. 2 is an exploded perspective view of the safety syringe shown in FIG. 1
  • FIG. 3 is an enlarged cross-sectional view illustrating an adapter and an upper end of a plunger which constitute the safety syringe shown in FIG. 1.
  • a safety syringe in accordance with an embodiment of the present invention includes an elongate cylinder 10, an injection needle assembly 20, and a plunger 30.
  • the cylinder 10 defines a space 10b for accommodating injection liquid.
  • the injection needle assembly 20 is connected to an upper end of the cylinder 10.
  • the plunger 30 is inserted into the cylinder 10 so that it can be moved upward and downward.
  • the plunger 30 functions to suck injection liquid into the cylinder 10 and discharge injection liquid accommodated in the cylinder 10 to the outside.
  • a cylindrical neck part 11 having a diameter smaller than that of the cylinder 10 is projectedly formed on the upper end of the cylinder 10.
  • a central axis of the neck part 11 corresponds to a central axis y-y of the cylinder 10.
  • An internal thread 11a is formed on a circumferential inner surface of the neck part 11, and a knob part 12 is formed on a lower end of the cylinder 10.
  • the injection needle assembly 20 is composed of an adapter 21 coupled to the neck part 11, a hub 23 press-fitted around an upper end of the adapter 21, and an injection needle 22 fixedly fitted through an upper end of the hub 23.
  • the adapter 21 has a lower half which is formed to have a cylindrical contour and an upper half which is formed to have a truncated cone-shaped contour.
  • An external thread 21a is formed on a circumferential outer surface of the adapter 21 so that it can be threadedly coupled with the internal thread 11a of the neck part 11.
  • An outward flange 21b is formed around a lower end of the adapter 21.
  • the external thread 21a and the internal thread 11a are formed as four to eight start helical threads .
  • the helical threads are formed to have a slope ⁇ ' of 25 ⁇ 50° when measured from a horizontal plane of the outward flange 21b. It is preferred that the threads are formed as four start threads, and the slope ⁇ ' is 30° .
  • annular seat portion lOd is formed on a lower surface of the neck part 11 of the cylinder 10.
  • the adapter 21 is threadedly coupled to the neck part 11, the outward flange 21b of the adapter 21 is fittedly seated on the annular seat portion lOd.
  • an O-ring 50 is intervened between the annular seat portion lOd and the outward flange 21b. In this way, ' the adapter 21 is airtightly and firmly coupled to the upper end of the cylinder 10.
  • the plunger 30 has a rod part 31 which has a central axis corresponding to the central axis y-y of the cylinder 10, and several ribs 32 which radially project from the rod part 31.
  • a head part 33 is formed on an upper end of the rod part 31, and a polygonal knob portion 35 is formed on a lower end of the rod part 31.
  • the polygonal knob portion 35 has a contour of a quadrangle with each side curved inward.
  • a plurality of fine protrusions 35a are formed on a lower surface of the polygonal knob portion 35 so as to prevent slippage of the fingers .
  • a rod 34 is formed on an upper end surface of the head part 33 of the plunger 30 in a manner such that it projects upward in a vertical direction and is eccentrically positioned from the central axis y- y of the cylinder 10 by a distance li.
  • the rod 34 has a quadrangular bar-shaped contour, and a hook part 35 is formed on an upper end of the rod 34 to extend in a horizontal direction.
  • a pair of projections 36 are formed on the upper end surface of and adjacent to an edge of the head part 33 of the plunger 30 in a manner such that they extend in the vertical direction and are oppositely positioned to each other.
  • the projections 36 are formed to have a length which is far shorter than that of the rod 34.
  • the adapter 21 is defined with a cavity 24 which extends from a lower end toward an upper end of the adapter 21.
  • a central axis of the adapter 21 corresponds to the central axis y-y of the cylinder 10.
  • the cavity 24 is divided into a lower cavity 24a and an upper cavity 24b.
  • the lower cavity 24a is gradually decreased in its diameter toward an upper end thereof and has a truncated cone-shaped contour.
  • the upper cavity 24b is communicated with the lower cavity 24a to continuously extend upward and has a lower end of a diameter greater than the upper end of the lower cavity 24a. Also, the upper cavity 24b is gradually decreased in its diameter toward an upper end thereof and has a truncated cone- shaped contour.
  • the upper cavity 24b may have a circular column-shaped contour and therefore a uniform diameter.
  • An elongate hole 21c is defined through the upper half of the adapter 21.
  • the elongate hole 21c is communicated with the upper cavity 24b so that injection liquid can be discharged through the upper cavity 24b and the elongate hole 21c.
  • a radius 1 2 of the upper end of the lower cavity 24a is made smaller than the eccentricity li of the rod 34 from the central axis y-y of the cylinder 10. If the plunger 30 is pushed into the cylinder 10, the upper end of the rod 34 is bent inward toward the central axis of the adapter 21 while being brought into contact with an inner surface of the adapter 21, defining the lower cavity 24a.
  • the hook engaging portion 25 is formed at a height of h 2 from the lower end of the adapter 21, which is smaller than a height hi of the rod 34.
  • Six grooves 26 are vertically defined on the inner surface of and adjacent to the lower end of the adapter 21. The grooves
  • projected wall portions 27, each of which is formed between two adjoining grooves 26, have lower ends which are curved to define a U-shaped outline.
  • the head part 33 of the plunger 30 is covered by an annular packing member 40.
  • the O-ring 50 is fitted around the adapter 21, and the hub 23 to which the injection needle 22 is secured is positioned above the upper end of the neck part 11 of the cylinder 10.
  • the adapter 21 and the neck part 11 of the cylinder 10 are firmly coupled with each other in a state wherein the outward flange 21b of the adapter 21 is fitted into the annular seat portion lOd formed on the lower surface of the neck part 11 of the cylinder 10. And, the hub 23 is forcibly press- fitted around the upper half of the adapter 21. Then, the head part 33 of the plunger 30 is covered by .the packing member 40. Thereafter, by fitting the plunger 30 into the cylinder 10, the assembling procedure of the safety syringe is completed.
  • the projections 36 formed on the upper end surface of the head part 33 of the plunger 30 are inserted into the grooves 26 of the adapter 21, and the rod 34 is inserted into the cavity 24.
  • the upper end of the rod 34 is bent inward toward the central axis y-y of the cylinder 10 while being brought into contact with the inner surface of the adapter 21, defining the lower cavity 24a, and then, the hook part 35 formed on the upper 5 end of the rod 34 is positioned above the hook engaging portion 25.
  • the injection needle 22 is removed from the human body. Thereafter, by reversely rotating the polygonal knob portion 35 of the plunger 30, the adapter 21 and the plunger 30 are integrally and reversely rotated with each
  • the hook part 35 of the rod 34 is engaged with the hook engaging portion 25 of the adapter 21, and thereby, the injection needle assembly 20 is also retracted into the cylinder 10.
  • the rod 34 which is bent 0 inward toward the central axis of the adapter 21, is unbent to extend in the vertical direction, the rod 34 biases the adapter 21 at the inner surface defining the lower cavity 24a, whereby the adapter 21 is inclined sideways in the cylinder 10. Therefore, the injection needle 22 is also inclined sideways in the cylinder 10.
  • the safety syringe according to the present invention provides advantages in that, since an adapter having connected thereto an injection needle is threadedly coupled to a neck part of a cylinder, fluctuation of the injection needle is prevented, whereby it is possible to prick the injection needle at a precise position.
  • grooves are vertically defined in the adapter and projections are vertically and projectedly formed on a plunger so that, when the projections are fitted into the grooves, shock is not generated. If the plunger is rotated, the adapter is integrally rotated therewith and unthreaded from the neck part of the cylinder.
  • a rod is vertically and projectedly formed on an upper end surface of the plunger so as to be eccentrically positioned from a central axis of the cylinder, and an upper end of the rod is formed with a hook part.
  • the adapter is defined with a cavity, and the upper end of the rod is inserted into the cavity while being bent inward toward a central axis of the adapter.
  • a hook engaging portion is formed on an inner surface of the adapter so that the hook part of the rod can be engaged into the hook engaging portion. If the plunger is pulled out of the cylinder, as the injection needle is withdrawn into the cylinder, the injection needle is inclined sideways, whereby it is possible to simply collapse the injection needle by pushing the plunger into the cylinder.

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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

Seringue de sécurité. Un adaptateur comportant une aiguille est vissé dans la partie d'embout d'un cylindre, ce qui permet d'éviter des mouvements de l'aiguille et d'assurer une piqûre précise à l'aide de celle-ci. Des rainures sont définies dans l'adaptateur et des protubérances sont formées sur le piston, de sorte que ces dernières peuvent être engagées aisément dans les premières. Si on fait tourner le piston à mesure que l'adaptateur est tourné d'un bloc, celui-ci se dévisse du cylindre. Une tige comportant un crochet est formée de manière excentrée sur le piston, et l'adaptateur comporte une partie creuse et une partie s'assemblant au crochet. On peut ainsi insérer la tige dans la partie creuse en la pliant vers l'intérieur, le crochet pouvant être accroché à la partie d'assemblage correspondante. A ce stade, à mesure qu'on retire le piston, l'aiguille est rétractée dans le cylindre, et ultérieurement affaissée lorsqu'on pousse le piston.
PCT/KR2001/002064 2001-11-27 2001-11-29 Seringue de securite WO2003045476A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002221167A AU2002221167A1 (en) 2001-11-27 2001-11-29 Safety syringe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020010074271A KR20030043209A (ko) 2001-11-27 2001-11-27 안전주사기
KR2001/74271 2001-11-27

Publications (1)

Publication Number Publication Date
WO2003045476A1 true WO2003045476A1 (fr) 2003-06-05

Family

ID=19716346

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2001/002064 WO2003045476A1 (fr) 2001-11-27 2001-11-29 Seringue de securite

Country Status (3)

Country Link
KR (1) KR20030043209A (fr)
AU (1) AU2002221167A1 (fr)
WO (1) WO2003045476A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008194317A (ja) * 2007-02-14 2008-08-28 Daikyo Seiko Ltd シリンジ用外筒及びシリンジ
US8062252B2 (en) 2005-02-18 2011-11-22 Becton, Dickinson And Company Safety shield system for a syringe
WO2012095679A1 (fr) * 2011-01-11 2012-07-19 Abu Dhabi National Industrial Projects Co. Seringue de sécurité autobloquante

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100456099B1 (ko) * 2002-01-28 2004-11-06 주식회사 세즈메디컬 안전주사기
KR20040031198A (ko) * 2002-10-04 2004-04-13 주식회사 세즈메디컬 안전주사기
KR20040049057A (ko) * 2002-12-03 2004-06-11 백우인 일회용 안전주사기
KR100894342B1 (ko) * 2002-12-24 2009-04-22 밍 쳉 슈이 주사기

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910004532Y1 (ko) * 1989-06-15 1991-06-29 방영철 안전 주사기
WO1992009320A1 (fr) * 1990-11-30 1992-06-11 Nujenko Pty. Ltd. Seringue
US5328484A (en) * 1992-08-12 1994-07-12 Brice Somers Non-reusable syringe for medical purposes
US5336198A (en) * 1993-02-01 1994-08-09 Innova Development Corp. Hypodermic syringe with needle retraction feature
KR200249104Y1 (ko) * 2001-06-28 2001-10-17 린 왕 주사기

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2785848B2 (ja) * 1989-07-12 1998-08-13 三菱電機株式会社 結晶基板の内部歪み測定方法
JPH0767961A (ja) * 1993-07-09 1995-03-14 Terumo Corp 注射器
DE9315861U1 (de) * 1993-10-18 1995-02-23 Medi Plus Tech Handels Gmbh Injektionsspritze
US5575774A (en) * 1995-10-24 1996-11-19 Chen; Long-Hsiung Structure of safety hypodermic syringe
US5993419A (en) * 1998-12-16 1999-11-30 Pi-Chang Lo And Hui-Lin Tsao Safety syringe
KR20010092865A (ko) * 2000-03-27 2001-10-27 라이 유-하우 창 안전 주사기
KR20030029744A (ko) * 2001-10-10 2003-04-16 주식회사 세즈메디컬 안전주사기

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910004532Y1 (ko) * 1989-06-15 1991-06-29 방영철 안전 주사기
WO1992009320A1 (fr) * 1990-11-30 1992-06-11 Nujenko Pty. Ltd. Seringue
US5328484A (en) * 1992-08-12 1994-07-12 Brice Somers Non-reusable syringe for medical purposes
US5336198A (en) * 1993-02-01 1994-08-09 Innova Development Corp. Hypodermic syringe with needle retraction feature
KR200249104Y1 (ko) * 2001-06-28 2001-10-17 린 왕 주사기

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8062252B2 (en) 2005-02-18 2011-11-22 Becton, Dickinson And Company Safety shield system for a syringe
JP2008194317A (ja) * 2007-02-14 2008-08-28 Daikyo Seiko Ltd シリンジ用外筒及びシリンジ
WO2012095679A1 (fr) * 2011-01-11 2012-07-19 Abu Dhabi National Industrial Projects Co. Seringue de sécurité autobloquante

Also Published As

Publication number Publication date
AU2002221167A1 (en) 2003-06-10
KR20030043209A (ko) 2003-06-02

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