WO2003008024A1 - Structure de raccordement pour aiguille de seringue de securite - Google Patents

Structure de raccordement pour aiguille de seringue de securite Download PDF

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Publication number
WO2003008024A1
WO2003008024A1 PCT/CN2001/001193 CN0101193W WO03008024A1 WO 2003008024 A1 WO2003008024 A1 WO 2003008024A1 CN 0101193 W CN0101193 W CN 0101193W WO 03008024 A1 WO03008024 A1 WO 03008024A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
syringe
connector
groove
grooves
Prior art date
Application number
PCT/CN2001/001193
Other languages
English (en)
Chinese (zh)
Inventor
Xiping Wang
Bizhu Zhang
Xiaopeng Wang
Original Assignee
Xiping Wang
Bizhu Zhang
Xiaopeng Wang
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 Xiping Wang, Bizhu Zhang, Xiaopeng Wang filed Critical Xiping Wang
Priority to PCT/CN2001/001193 priority Critical patent/WO2003008024A1/fr
Publication of WO2003008024A1 publication Critical patent/WO2003008024A1/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
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/348—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub snap lock, i.e. upon axial displacement of needle assembly
    • 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

Definitions

  • the invention relates to two improved safety syringe needle connection and replacement structures, and belongs to the technical field of medical health.
  • a slot 161 is located at the front of the cylindrical surface 16; a rotatable card plate 8 is mounted on the front surface 37 of the syringe 3 through a pin 7, and a ball pin 82 is provided on the card plate 8 for easy operation.
  • the card plate 8 is approximately one and a half
  • the thickness of the ring is slightly smaller than the width of the groove 161.
  • the card board 8 When the card board 8 is pushed to rotate outward to the two-dot chain line position in FIG. 7B, the card board 8 releases the axial locking effect on the connector 1, and allows the connector 1 and the needles thereon to be withdrawn into the syringe. 3 within.
  • FIG. 6A After injection of the existing safety syringe, when the needle 2 is pulled back into the syringe 3, to prevent the needle tube 22 from protruding out of the syringe 3 again, the needle 2 is biased toward the syringe 3 by the structural force. Hole wall, when the needle tube 22 enters the syringe 3, the needle tube 22 will contact the outer end of the inner hole 31, and the residual blood BD stained thereon will hang on the end surface 37 of the syringe 3, because the end surface 37 is The exposed surface, so contaminated residual blood BD may still infect doctors and patients.
  • the object of the present invention is to reduce the operation action without increasing the number of structural parts, make the operation of replacing the needle easier and more convenient, and increase the joint fastness of the standard needle.
  • a safety syringe needle connection structure includes a syringe and a needle connector that can be moved axially inside a hole in the front end of the syringe.
  • the outer surface of the front end of the needle connector is a conical surface for the sleeve of the needle connection hole. It is characterized in that at least one groove is provided on the outer cylindrical surface where the front end of the needle connector is matched with the inner hole of the front end of the syringe, and the front end of the syringe is provided with a straight groove in the axial direction to form an elastically bendable card board corresponding to the number of grooves.
  • the position of the clamp plate corresponds to the groove, and the groove can be inserted into the groove to squeeze the needle connector axially and circumferentially at the same time.
  • the number of grooves is preferably two, and the axes are symmetrical with each other.
  • the front end of the syringe is provided with four straight grooves to form two symmetrical elastically bendable clamping plates.
  • the positions of the two clamping plates correspond to the two grooves.
  • the pressure-embedable groove positions both the needle connector axially and circumferentially.
  • the front end of the inner hole of the syringe is provided with a step hole.
  • the large diameter end of the conical surface of the tip of the needle connector is a sharp rough surface, and the outer envelope of the sharp rough surface is outside the extension of the smooth outer surface of the small diameter end.
  • the pointed rough surface may be any of a zigzag shape, a thread shape, or a knurl shape.
  • Solution two a safety syringe needle connection structure, including a syringe and a sleeve placed on the front end of the syringe A needle connector that can be moved axially in the hole.
  • the outer surface of the front end of the needle connector is a conical surface for sleeve connection of the needle connection hole. It is characterized in that: a through groove is opened in the front end of the syringe, and the diameter of the root of the cone of the connector is Two grooves are symmetrically arranged upward and downward, and a U-shaped clamping plate is also provided. The two arms at the front end of the clamping plate can be inserted into two slots surrounded by the through groove and the groove to position the needle connector axially and circumferentially at the same time.
  • both the axial and circumferential positioning of the needle connector can be achieved simultaneously when the needle is replaced or reinstalled.
  • the needle cylinder is held when changing needles, and two fingers are respectively held at the upper and lower card positions. Due to the pressure of the fingers, the card is elastically bent toward the axis and enters the connector groove.
  • the groove is appropriately selected. The depth and the width of the clamp plate can ensure that the connector is restricted by the clamp plate from being able to retreat or rotate along the axis, and the needle can be easily reinstalled or replaced in the field.
  • the card board when the needle is to be installed or replaced, the card board is inserted into the groove of the needle connector along the straight groove of the needle cylinder. Then, the connector cannot be moved axially by the card board, nor can it be rotated along the axis. It can withstand the axial assembly thrust and rotational force distance when installing the needle, and easily reinstall or replace the needle on site.
  • This solution only adds a simple card board accessory, and it is only used when the site needs to be reinstalled or the needle is replaced, so the increase in production cost is small.
  • the technical measure to improve the fastness of the needle joint is to divide the 6% Luer tapered surface of the connector or the needle base with the needle into two parts.
  • the first half (about 1/2 of the mating length) is kept as a conical surface, and the second half is as follows Changes: 1. Change the tapered surface to a pointed surface, so that after the needle is loaded, the needle will cooperate with the corresponding surface of the tapered surface to deform under the force of assembly, thereby increasing the joint fastness; 2.
  • the sharp rough surface The outer enveloping surface is outside the extension line of the smooth outer surface of the small diameter end (for example, about 0.1 ⁇ 0.2mm), which is larger than the inner diameter of the tapered hole of the needle with which it is fitted, thereby increasing the fitting fastness of this part.
  • FIG. 1 is a connection diagram of a standard needle and a connector in the prior art
  • FIG. 2 is a schematic structural diagram of a first embodiment of the present invention
  • Figure 3 is a left side view of Figure 2;
  • FIG. 4 is a perspective view of the connection base 1 in FIG. 2.
  • FIG. 5 is a perspective view of the front end of the syringe 3 in FIG. 2;
  • FIG. 6A is a schematic diagram of residual blood contamination at the front end of the syringe 3 in FIG. 1;
  • Figure 6B is a functional schematic diagram of the structure of the present invention to prevent residual blood pollution;
  • Figure 7A, B is a schematic structural diagram of the front end of a Japanese safety syringe product;
  • Figure 8 is one of the improved 6% Luer connector schemes
  • FIG. 9 is an enlarged sectional view of FIG. 8;
  • Figure 10 is the second of the improved 6% Luer connector scheme
  • Figure 11 is the third of the improved 6% Luer connector scheme
  • FIG. 12 is a schematic structural diagram of a second embodiment of the present invention.
  • FIG. 13 is a left side view of FIG. 12;
  • Fig. 14 is a perspective view of the connector 1 in Fig. 12;
  • FIG. 15 is a perspective view of the card board 6 in FIG. 12;
  • Fig. 16 is a perspective view of the front end of the syringe 3 in Fig. 12.
  • Figure 1 is a view of a standard 6% Luer fitting mating with a connector in an existing safety syringe. It can be seen that the joint surface of the inner cone surface 21 of the standard needle 2 and the outer cone surface 11 of the connector 1 is a simple cone surface. When the cone angles are the same and the mating dimensions are the same, more reliable connection stability can be obtained. Manufacturing errors, which greatly affects the reliability of cooperation, which is common for ordinary Syringes do not cause substantial difficulties, but for most safety syringes, it is difficult to reinstall them after they are released. This is because the connector 1 can slide back inside the syringe 3 so that after the injection is completed, Pull the needle back into the barrel. Therefore, the connector 1 cannot withstand the large axial thrust force into the syringe when installing the needle, and it cannot withstand the additional rotational force distance.
  • FIG. 9 uses a sawtooth cross section, and the angle between the inclined surface 1121 and the cone axis along the increasing direction of the tapered surface is small to facilitate needle insertion; The angle between 1122 and the axis of the cone is large.
  • the outer envelope surface of the rear end 112 is outside the extension line of the smooth outer surface of the small diameter end (such as about 0.1 ⁇ 0.2mm), as shown in FIG. 9, that is, the outer envelope surface of the rear end 112 is higher than the front surface 111 A smaller amount ⁇ is larger than the inner diameter of the tapered hole of the needle with which it is fitted, so that the fitting fastness of this part can be increased. It can be seen that when the needle 2 is forced into the conical surface, because the needle cover is a thin-walled part made of plastic, a certain plastic deformation will inevitably occur when it is in strong contact with the surface of this tine. As a result, the force required to loosen the syringe is greatly increased, which significantly increases the stability of the joint.
  • Fig. 10 shows a portion of the rear end 112 which is formed into a cusp thread shape with a small wheelbase.
  • the threaded connection is often a non-standard needle cover with internal thread, while the present invention only uses canines to deform the inner hole of the needle cover.
  • Fig. 11 is a method of knurling the surface of the rear end 112 into point-shaped tines, which also achieves deformation of the tapered hole in the needle cover to increase stability.
  • the same purpose can be achieved by using other tine-like structures.
  • Either solution must use a close-tooth structure to ensure that as many tines as possible come into contact with the inner surface of the needle to compensate for too few engaging teeth caused by variations in the joining length caused by manufacturing errors, which affects joint reliability .
  • Figures 2 to 5 are the first practical solution of the present invention to achieve connector locking, including a needle connector 1, a needle 2; a syringe 3; a sealing ring 4; and a needle jacket 5.
  • the cylindrical surface 16 of the needle connector 1 is matched with the inner hole 31 at the front end of the syringe 3 and can slide thereon.
  • the cylindrical surface 16 is provided with two opposite grooves 13, and the groove bottom may be flat or inclined as shown.
  • the distance between the front wall of the groove 13 and the front end surface 17 of the needle connector 1 should be more than 0.5 mm; the maximum width of the groove 13 is limited to not affecting the sealing performance of the sealing groove 14.
  • the front end of the syringe 3 defines four straight grooves 34 and 34 ′ parallel to the vertical plane passing through the axis.
  • the width of the grooves 34 and 34 ' is based on the minimum width that can be achieved by the injection mold (eg, 0.2 to 0.8 mm). The length is limited to not communicate with the sealing groove 36. Generally, the width B between the two straight grooves 34 or 34 'may be about half the diameter of the cylindrical surface 16 of the syringe 3 and the connector 1. In this way, two elastically bendable clamping plates 33 can be formed at the front end of the syringe 3.
  • a step hole (stop) 32 is made at the front end of the inner hole 31 of the syringe 3, and its diameter should be about 1 mm larger than the inner hole 31.
  • the width of the step 32 should be such that the clamping plate 33 is deformed inward, and the end face 35 of the step 32 It can enter the groove 13 of the connector 1, that is, the distance A ′ between the end surface 35 and the sealing groove 36 should be smaller than the distance A from the front wall 131 of the groove 13 on the connector 1 to the sealing groove 14.
  • the end surface 35 may be perpendicular to the axis, or may be slightly inclined backward by an angle of ⁇ , so that when the clamping plate 33 is bent inwardly, it can form a good contact with the front end surface 131 of the groove of the connector 1.
  • the stepped hole 32 at the front end of the syringe 3 also has an important safety function, as shown in FIG. 6A.
  • the needle 1 is pulled back into the syringe 3 to prevent the needle tube 22 from protruding the needle again. Outside the barrel 3, the needle is biased towards the wall of the hole of the barrel 3 by the structural force.
  • the barrel 22 When the barrel 22 enters the barrel 3, the barrel 22 will contact the edge of the inner hole 31, and the residual blood BD attached to it will hang.
  • this structure has no effect on normal production, assembly, and use. It is only required that the groove 13 of the connector 1 and the clamping plate 33 on the syringe 3 are aligned during assembly, which is not difficult to achieve.
  • the card 33 is not stressed and is not deformed, and is in the original position, that is, the inner end surface 35 is not in contact with the end surface 131 of the groove 13 on the connector 1 contact. Therefore, the retracting of the connector 1 into the syringe 3 is not restricted.
  • the upper and lower clamping plates 33 need only be pinched with fingers, and the clamping plate 33 is elastically bent and deformed due to pressure. Entering the groove 13 on the connector 1, that is, the inner end surface 35 of the card plate 33 is lowered to the rear position of the inner end surface 131 of the groove 13 of the connector 1, and the two sharp points 331 on the inner surface of the card plate 33 will abut on The bottom plane 132 of the groove 13.
  • the process of transmitting the axial thrust generated by the needle installation is: the inner end surface 131 of the connector 1 ⁇ the inner end surface 35 of the clamping plate 33 on the syringe 3—the clamping plate 33—the syringe 3, during which the connector 1 receives an axial Limiting, thereby preventing the connector 1 from retracting into the syringe 3, thereby rendering the syringe ineffective; and because the two upper points 331 on the clamping plate 33 are in contact with the bottom surface 132 of the groove 13 on the connector 1, thereby limiting the The connector 1 rotates around its own axis.
  • the rotation torque applied to the needle sleeve 5 when the needle is installed is transmitted to the connector 1 through the needle 2 so that it has a tendency to rotate.
  • this rotation torque is formed by the two sharp points 331 on the clamping plate 33
  • the balance of torque prevents the connector 1 from turning, so that the operation of replacing the needle can be easily and smoothly completed.
  • This structure can simultaneously bear the axial thrust and rotation torque of the installation needle, which completely solves the problem of using the field assembly or replacement of the needle, and also improves the fastness of the needle installation and makes it safer to use.
  • the step hole 32 can further prevent accidental infection, thereby further improving the safety performance of the syringe.
  • the structure uses standard injection needles, which is very versatile and therefore more acceptable to medical staff.
  • the structure is concise, it does not need to add any new parts or complicated assembly requirements, that is, it basically does not increase production costs, and it is also convenient for injection molding production.
  • a straight groove 311 is formed on the front end surface 37 of the syringe 3, and its depth is preferably greater than the thickness C of the card plate 6 to be described below, and its width D 'should be slightly larger than the width D of the card plate 6.
  • the card board 6 is a thin plate-like part with an open groove.
  • the thickness C of the card board 6 must be a certain strength and slightly smaller than the width C of the groove on the connector 1.
  • the width E of the open groove is slightly larger than the connection. The distance E1 between the two bottom surfaces of the two grooves 18 on the device 1.
  • the connector 1 can resume the function of moving into the syringe 3. Compared with the solution of a Japanese company shown in Figure 7, this solution is reliable. There is no requirement on the position of the hand grip of the syringe 3 when the needle 1 is installed.
  • the structure of the additional slot and the clamping plate 6 is simple, and it is easy to process and produce. .
  • the invention completely solves the problem of using a field assembly or replacement needle, and also improves the fastness of the needle installation, and has the advantages of safer use, further prevention of accidental infection, simple installation operation, strong versatility, and convenient injection molding production.
  • the application will produce good social benefits and significant economic benefits.

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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 structure de raccordement pour une aiguille de seringue de sécurité, comprenant un corps de seringue, un organe de raccordement d'aiguille dont l'extrémité avant présente une surface extérieure effilée venant en contact avec l'orifice de raccordement d'aiguille. L'invention est caractérisée en ce que la surface cylindrique extérieure de l'organe de raccordement d'aiguille, adaptée à l'orifice intérieur du corps de seringue, présente au moins une rainure. Des fentes sont ménagées, dans le sens axial, sur l'extrémité avant du corps de seringue de manière à recevoir des éléments de blocage pouvant subir une flexion élastique. Le nombre d'éléments de blocage correspond au nombre de rainures. L'emplacement de l'élément de blocage correspond à celui de la rainure, les éléments de blocage pouvant être enfoncés dans les rainures pour bloquer l'organe de raccordement dans le sens axial et de manière circulaire.
PCT/CN2001/001193 2001-07-20 2001-07-20 Structure de raccordement pour aiguille de seringue de securite WO2003008024A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2001/001193 WO2003008024A1 (fr) 2001-07-20 2001-07-20 Structure de raccordement pour aiguille de seringue de securite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2001/001193 WO2003008024A1 (fr) 2001-07-20 2001-07-20 Structure de raccordement pour aiguille de seringue de securite

Publications (1)

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WO2003008024A1 true WO2003008024A1 (fr) 2003-01-30

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PCT/CN2001/001193 WO2003008024A1 (fr) 2001-07-20 2001-07-20 Structure de raccordement pour aiguille de seringue de securite

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2464112A (en) * 2008-10-02 2010-04-07 Abdul Khaliq Malik Needle locking mechanism for a syringe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490142A (en) * 1983-08-22 1984-12-25 Silvern Rubin D Carpule syringe with rapidly acting mechanism for controllably _positively retaining the hub of a hypodermic needle
CN1186699A (zh) * 1996-11-29 1998-07-08 生化学工业株式会社 用于注射器的夹持器与采用该夹持器的注射器械
CN2371992Y (zh) * 1999-05-26 2000-04-05 秦飞华 安全性注射器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490142A (en) * 1983-08-22 1984-12-25 Silvern Rubin D Carpule syringe with rapidly acting mechanism for controllably _positively retaining the hub of a hypodermic needle
CN1186699A (zh) * 1996-11-29 1998-07-08 生化学工业株式会社 用于注射器的夹持器与采用该夹持器的注射器械
CN2371992Y (zh) * 1999-05-26 2000-04-05 秦飞华 安全性注射器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2464112A (en) * 2008-10-02 2010-04-07 Abdul Khaliq Malik Needle locking mechanism for a syringe
GB2464112A9 (en) * 2008-10-02 2010-05-19 Abdul Khaliq Malik Mechanism for the inhibition of the needle/cannulamotion in disposable hypodermic syringes
GB2464112B (en) * 2008-10-02 2010-11-24 Abdul Khaliq Malik Needle/cannula motion inhibitor in syringes

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