WO2013127260A1 - Replaceable-needle inner needle base structure for use in safe self-destructing syringe - Google Patents
Replaceable-needle inner needle base structure for use in safe self-destructing syringe Download PDFInfo
- Publication number
- WO2013127260A1 WO2013127260A1 PCT/CN2013/000191 CN2013000191W WO2013127260A1 WO 2013127260 A1 WO2013127260 A1 WO 2013127260A1 CN 2013000191 W CN2013000191 W CN 2013000191W WO 2013127260 A1 WO2013127260 A1 WO 2013127260A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- needle
- annular
- wall
- replaceable
- groove
- Prior art date
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- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston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
-
- 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
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/344—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub using additional parts, e.g. clamping rings or collets
- A61M5/345—Adaptors positioned between needle hub and syringe nozzle
-
- 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
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/347—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub rotatable, e.g. bayonet or screw
Definitions
- the present invention relates to the technical field of medical devices, and more particularly to a needle-changeable needle hub structure for a safe self-destructing syringe, and more particularly to a mechanical connection structure thereof.
- the core rod body has a certain elasticity, wherein the longitudinal notch is narrow and wide, and the outer wall of the upper core rod of the lateral notch protrudes from the outer wall of the lower core rod, the lateral gap
- the outer end of the core rod is in the shape of a circular arc
- the upper needle seat is formed into a cylindrical shape
- the upper part of the outer wall of the upper needle seat is provided with a reinforcing wing piece
- the lower part of the outer wall of the upper needle seat is provided with a fixed convex ring of the upper needle seat
- the outer diameter of the fixing ring of the needle seat is larger than the diameter of the outer wall of the upper needle seat of 0 05mm-0.3mm
- the lower needle seat is cylindrical
- the inner cavity is hollow
- the inner wall of the lower needle cavity is provided with a lower needle seat annular fixing concave
- the annular fixing groove of the lower needle seat can cooperate with the fixing convex ring of the upper needle seat, and the inner diameter of the upper cavity
- the inner wall of the cylinder neck of the cylinder body is respectively provided with a cylinder neck upper limit ring and a cylinder neck lower limit ring, and the distance between the cylinder neck upper limit ring and the cylinder neck lower limit ring is 0.3 mm - 1.5 mm, and the cylinder neck upper limit position
- the ring protrudes from the inner wall of the upper end ring of the cylinder neck and the lower limit ring of the cylinder neck by 0.1 mm - 0.6 mm.
- the lower limit ring of the neck protrudes from the inner wall of the upper end ring of the cylinder neck and the lower limit ring of the cylinder neck to 0.02 mm - 0.25 mm
- the inner diameter of the upper cylinder of the upper cylinder of the upper end of the cylinder neck is the upper limit ring of the inner cylinder and the lower limit of the neck of the cylinder
- the inner diameter of the inner cavity of the cylinder is smaller than the outer diameter of the annular rib of the lower needle seat by 0.1 mm - 0.5 mm, and the inner cavity of the cylinder is opposite to the cylinder
- the inner wall of the other end of the neck is provided with a cylinder
- the function of retracting the needle by using the barb body is realized, and safety injection is realized.
- the barb body is a metal piece or a plastic piece.
- Metal parts need to be processed and matched or assembled with the core rod.
- the manufacturing process is complicated, difficult and not stable, which not only increases the processing steps and manufacturing costs, but also increases the safety and product quality of the metal parts themselves and their assembly process. Uncertainty in terms of hidden dangers.
- Existing plastic barbs still have defects or imperfections in structure, which leads to safety hazards or safety holes in the use of the product.
- the existing plastic inverted fastener design can realize the needle pullback function, but in use, the needle is still in a normal trajectory after being pulled back, and the needle may be pushed out again, causing the user to be damaged twice.
- the existing single needle seat back-pull safety self-destructing syringe or safety syringe has the same problem, that is, how to solve the stability of the inner needle seat and the cylinder and achieve a certain strength to meet the stability.
- sexual requirements At the same time, the required pulling force when retracting the needle holder should not be too large for convenient use.
- the rigid mating structure can achieve a stable locking effect on the inner needle seat and the inner wall of the cylinder, it is difficult or even impossible to achieve the convenience of use at the same time.
- the inherent instability of the plastic material and its susceptibility to changes in ambient temperature can result in poor stability of the product of the hard-fit structure, and the quality and precision of the production process are difficult to control, making it almost impossible to achieve mass production.
- the syringe needle can be locked between the needle seat and the syringe barrel by an elastic buffer mechanism, and the expansion force is generated by the deformation of the buffer gap to achieve the locking and disengaging effect of the two.
- the elastic buffer mechanism can be disposed at the inner needle seat. It can also be disposed at the inner wall of the cylinder.
- the inner needle seat and the cylinder body form an elastic buffering engagement mechanism which can cooperate with each other, and the end of the core rod is provided with an asymmetric locking member with an elastic function, and the locking member can be Interlocking with the inner cavity of the syringe needle by locking, and when the needle holder is pulled back into the syringe barrel After the force of the asymmetric elastic structure, the needle seat will be deflected to one side by force, and the needle will be inverted toward the inner wall of the cylinder in the direction of nearly forty-five degrees, and locked by the neck of the cylinder.
- a first technical solution of the present invention is: a replaceable needle inner needle seat structure for a safe self-destructing syringe, comprising a needle base body, wherein: the needle seat body The inner cavity is hollow, and the hollow inner cavity is provided with an inner sleeve type pull-back locking assembly, and the upper part of the needle seat body forms a replaceable needle fitting portion, and the lower part of the needle seat body forms an elastic sealing limit portion, and the needle-changeable assembly portion
- the elastic sealing limit portion is formed into a single unit structure, and the surface of the elastic sealing limit portion is provided with an annular buffer gap, and the outer wall of the elastic sealing limit portion outside the annular buffer gap forms an annular sealing limit engaging portion, and the elastic sealing Anti-bending ribs are arranged on the outer wall of the limiting portion.
- a second technical solution of the present invention is: a replaceable needle inner needle seat structure for a safe self-destructing syringe, comprising a needle base body, wherein: the needle seat body The inner cavity is hollow, and the hollow inner cavity is provided with an inner sleeve type pull-back locking assembly.
- the upper part of the needle seat body forms a replaceable needle fitting portion
- the lower part of the needle seat body forms an elastic sealing limit portion
- the elastic sealing limit component body assembly structure the surface of the elastic sealing limit portion is provided with an annular buffer gap, and the outer wall of the elastic sealing limit portion outside the annular buffer gap forms an annular sealing limit engagement portion, and the elastic sealing limit Anti-side ribs are provided on the outer wall of the part.
- the present invention discloses a replaceable needle inner needle seat structure for a safe self-destructing syringe, and an end of the syringe core rod matched therewith is provided with an asymmetric pull-back locking member with elastic function; an asymmetric structure
- the elastic function design ensures that the locking member can be smoothly inserted into the inner cavity of the needle seat, and the elastic expansion force acts to realize the engagement card of the inner sleeve type pull-back locking component of the asymmetric engaging portion and the inner cavity of the needle seat.
- the inner sleeve pull-back locks the inner cavity of the assembly, and locks with the inner sleeve type pull-back locking assembly when the locking member is retracted, and when the needle holder is pulled back into the syringe barrel, under the force of asymmetric force
- the needle seat will deflect toward one side, and the needle will therefore fall to the side of the inner wall of the cylinder in the direction of nearly forty-five degrees, and will be locked by the neck of the cylinder, thereby causing the needle and the needle holder to be unable to be pushed out again.
- neck The department effectively prevents the needle from being pushed out again to cause secondary damage, and truly realizes the safe self-destruct operation of the syringe.
- the pullback locking member is a plastic barb body.
- the plastic barb body adopts a design principle that the asymmetry and the elastic structure are skillfully matched, and the specific angle and size design are adopted, so that the barb body has an elastic buffer locking function, and the above asymmetric elastic pull-back locking member and the core rod Integral structure, the whole part is molded in one time, no need for separate processing or subsequent assembly, which effectively reduces the manufacturing cost, simplifies the assembly process and reduces the assembly process.
- the product is easy to operate and has stable working condition.
- the asymmetric elastic pull-back piece at the end of the core rod and the inner cavity of the needle seat have excellent locking and locking effect.
- the overall structure of the product is reasonable, the concept is clever, and it is easy to promote and apply. Compared with the existing products. In terms of design and technology, the design has significant technical breakthroughs and outstanding safety and practical features.
- Fig. 1 is a schematic structural view of the present invention.
- FIG. 2 is a schematic structural view of a body of a hub of the present invention.
- FIG. 3 is a schematic structural view of an inner sleeve type pull-back locking assembly according to the present invention.
- FIG. 4 is a view showing a state of use of the present invention.
- the present invention is a replaceable needle inner needle seat structure for a safety self-destructing syringe, which comprises a needle base body, which is different from the prior art in that: the needle seat body cavity is hollow, the hollow body An inner sleeve type pull-back locking assembly 7 is disposed in the inner cavity, and the upper part of the needle seat body forms a replaceable needle fitting portion 1.
- the lower portion of the needle seat body forms an elastic sealing limit portion 2, the needle-changeable assembly portion 1 and the elastic seal
- the limiting portion 2 is formed as a unitary single body structure, and the annular sealing gap 3 is formed on the surface of the elastic sealing limiting portion 2, and the outer wall of the elastic sealing limiting portion 2 on the outer side of the annular buffering gap 3 forms an annular sealing limit engaging portion 4
- the side wall of the elastic sealing limit portion 2 is provided with an anti-side rotation rib 5 .
- the elastic sealing limit portion enables the stable engagement between the needle holder body and the cylinder body, and achieves the effect of lightly withdrawing.
- Another technical solution of the present invention is a replaceable needle inner needle seat structure for a safe self-destructing syringe, which comprises a needle base body, which is different from the prior art in that: the needle seat body cavity Hollow, the hollow inner cavity is provided with an inner sleeve type pull-back locking assembly 7, the upper part of the needle seat body forms a replaceable needle fitting portion 1, and the lower part of the needle seat body forms an elastic sealing limit portion 2, which can be assembled by needle
- the portion 1 and the elastic sealing limit portion 2 are assembled in a body shape, and the annular sealing gap 3 is opened on the surface of the elastic sealing limiting portion 2, and the outer wall of the elastic sealing limiting portion 2 on the outer side of the annular buffering gap 3 forms an annular sealing limit card.
- Joint 4 elastic sealing limit 2
- An anti-side rib 5 is provided at the outer wall.
- the outer spiral fitting portion 6 is formed at the interchangeable needle fitting portion 1.
- the upper portion of the interchangeable needle fitting portion 1 has a truncated cone shape with a taper of 6:100, and the outer outer wall of the replaceable needle fitting portion 1 forms an outer spiral fitting portion 6.
- the end portion of the anti-side rib 5 has a semi-circular shape or a tapered shape.
- an excessive distance between the interchangeable needle fitting portion 1 and the elastic seal limiting portion 2 forms an annular step 8 or an annular slope.
- the annular buffer gap 3 is an annular groove structure, the height from the notch to the bottom of the groove is 0.05mm-4mm, and the width of the annular buffer gap 3 is 0.05mm-4mm, ring buffer
- the distance between the outer groove wall of the gap 3 and the arc top of the surface of the annular seal limit engagement portion 4 is 0.1 mm-6 mm, and the outer groove wall groove of the annular buffer gap 3 and the outer wall of the annular seal limit engagement portion 4
- the distance between the gaps is 0.1mm-6mm, and the distance between the bottom of the outer groove wall of the annular buffer gap 3 and the outer wall of the annular seal limit engagement portion 4 is 0.1mm-6mm, and the annular seal limit engagement portion
- the surface of the annular seal is 4, and the distance from the top of the annular seal to the edge of the arc is less than the distance from the top of the arc to the lower edge of the arc.
- the lower end of the annular seal is engaged.
- An annular recess 9 is formed at the outer
- the annular recess 9 is located on the same horizontal surface as the groove bottom of the annular buffer gap 3 or higher than the groove bottom of the annular buffer gap 3.
- annular sealing ring fitting groove 10 is formed at an outer wall of the elastic sealing limiting portion 2 of the lower portion of the annular step 8.
- the annular sealing ring fitting groove 10 is sleeved with a "0" Shape sealing rubber ring 11.
- At least one inner needle ring annular limiting groove 12 is formed at the inner wall of the needle body cavity, and the inner sleeve type pull-back locking component 7 is provided in the needle body body cavity, and the inner sleeve type pull-back At least one of the limiting collars 13 that cooperate with the inner needle ring annular limiting groove 12 is disposed at the outer wall of the locking assembly 7.
- the inner sleeve type pull-back locking assembly 7 has a hollow inner cavity, and an inner wall of the inner cavity forms an annular engagement locking portion 14 near the lower end opening.
- the upper portion of the annular locking locking portion 14 forms an annular groove 15
- the inner side wall 16 of the annular groove 15 has a thickness of 0.01 mm - 3 mm
- the inner side wall and the annular groove of the annular groove 15 15 The outer side wall 17 forms an angle of 2 to 90 degrees
- the inner diameter formed at the upper end of the inner side wall of the annular groove 15 is 1 mm to 80 mm.
- the annular groove 15 has a notch width greater than a groove bottom width.
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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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201220071170 CN202777315U (en) | 2012-02-29 | 2012-02-29 | Replaceable needle inner needle seat structure for safe self-destructing type syringe |
CN201220071170.5 | 2012-02-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013127260A1 true WO2013127260A1 (en) | 2013-09-06 |
Family
ID=47804672
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2012/000931 WO2013127039A1 (en) | 2012-02-29 | 2012-07-05 | Replaceable-needle inner needle base structure for use in safe self-destructing syringe |
PCT/CN2013/000191 WO2013127260A1 (en) | 2012-02-29 | 2013-02-26 | Replaceable-needle inner needle base structure for use in safe self-destructing syringe |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2012/000931 WO2013127039A1 (en) | 2012-02-29 | 2012-07-05 | Replaceable-needle inner needle base structure for use in safe self-destructing syringe |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN202777315U (en) |
WO (2) | WO2013127039A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5968020A (en) * | 1993-03-12 | 1999-10-19 | Saito; Yoshikuni | Syringe assembly |
CN2750815Y (en) * | 2004-12-29 | 2006-01-11 | 吴建中 | Disposable safety self-destruction syringe |
CN1986013A (en) * | 2005-12-19 | 2007-06-27 | 陈昌慈 | Safety injector |
CN101411908A (en) * | 2007-10-16 | 2009-04-22 | 上海顶尖堂生化科技有限公司 | Safe self-destruction type vaccine injector |
CN101862490A (en) * | 2010-06-21 | 2010-10-20 | 温岭市千禧光医疗器械有限公司 | Self-destruction insulin syringe capable of replacing needle |
CN202105269U (en) * | 2011-06-07 | 2012-01-11 | 倍安德普医疗科技(上海)有限公司 | Inner needle base structure for safe self-destruction syringe |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0582849A1 (en) * | 1992-08-12 | 1994-02-16 | Brice Somers | Syringe |
AUPN254195A0 (en) * | 1995-04-20 | 1995-05-18 | Curie, Napoleon | Syringe with retractable needle mount |
CN1188184C (en) * | 2000-03-27 | 2005-02-09 | 张赖玉好 | Safe syringe |
CN2710663Y (en) * | 2004-06-30 | 2005-07-20 | 张金荣 | Improved structure of needle fastening seat for safety syringe tube |
CN1586652A (en) * | 2004-07-06 | 2005-03-02 | 邹纯平 | Self-destroying safety injector |
CN201735028U (en) * | 2010-06-17 | 2011-02-09 | 昆山和兴医疗科技有限公司 | Safe self-destruction injection syringe with locking structure |
-
2012
- 2012-02-29 CN CN 201220071170 patent/CN202777315U/en not_active Expired - Lifetime
- 2012-07-05 WO PCT/CN2012/000931 patent/WO2013127039A1/en active Application Filing
-
2013
- 2013-02-26 WO PCT/CN2013/000191 patent/WO2013127260A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5968020A (en) * | 1993-03-12 | 1999-10-19 | Saito; Yoshikuni | Syringe assembly |
CN2750815Y (en) * | 2004-12-29 | 2006-01-11 | 吴建中 | Disposable safety self-destruction syringe |
CN1986013A (en) * | 2005-12-19 | 2007-06-27 | 陈昌慈 | Safety injector |
CN101411908A (en) * | 2007-10-16 | 2009-04-22 | 上海顶尖堂生化科技有限公司 | Safe self-destruction type vaccine injector |
CN101862490A (en) * | 2010-06-21 | 2010-10-20 | 温岭市千禧光医疗器械有限公司 | Self-destruction insulin syringe capable of replacing needle |
CN202105269U (en) * | 2011-06-07 | 2012-01-11 | 倍安德普医疗科技(上海)有限公司 | Inner needle base structure for safe self-destruction syringe |
Also Published As
Publication number | Publication date |
---|---|
WO2013127039A1 (en) | 2013-09-06 |
CN202777315U (en) | 2013-03-13 |
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