EP3478346A1 - Injection device - Google Patents

Injection device

Info

Publication number
EP3478346A1
EP3478346A1 EP17729384.2A EP17729384A EP3478346A1 EP 3478346 A1 EP3478346 A1 EP 3478346A1 EP 17729384 A EP17729384 A EP 17729384A EP 3478346 A1 EP3478346 A1 EP 3478346A1
Authority
EP
European Patent Office
Prior art keywords
bead
sheath
interface
contact portion
contact
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP17729384.2A
Other languages
German (de)
French (fr)
Inventor
Emmanuel Mastorakis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3478346A1 publication Critical patent/EP3478346A1/en
Withdrawn legal-status Critical Current

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
    • 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

Definitions

  • the present invention relates to an injection device and a syringe equipped with such a device.
  • a preferred application is for the medical device and accessories industry.
  • the syringe comprises an injection device attached to the head of the syringe body and provided with a needle.
  • a needle Such a device is illustrated in Figures 1 to 3.
  • the device attached to the head of the syringe body comprises a part allowing its mounting on said body, in the form of mechanical interface and a part on which the needle is assembled forming the receiving sheath of this needle.
  • the sheath is the interface are in contact. Nevertheless, according to this anteriority, the needle is retractable into the body of the syringe once the injection operations are complete.
  • This arrangement provides better security of use to the medical device.
  • the sheath carrying the needle is separated from the interface as shown in Figure 2.
  • the fact that the sheath and the interface must move from a position where they are secured and sealed to a position of Uncoupling poses sealing difficulties that are usually solved by reported O-rings.
  • FIG. 10 shows a mechanical retention of a sheath integral with the needle with a base piece; the base piece has a relief which fits into a hollow of the sheath; this contact of a projection in a hollow is not very effective in terms of sealing.
  • One aspect of the invention relates to an injection device, comprising a mounting interface on a syringe body, the interface comprising an inner passage delimited by an inner wall, a needle and a receiving sheath of said needle, said sheath comprising an outer wall provided with a contact portion of said sheath against a fixing portion of the inner wall of the interface
  • the contact portion comprises a first bead and the fixing portion comprises a second bead, the first and second bead each forming a ring in relief respectively on the contact portion and the fixing portion, the first bead being contact of the second bead.
  • the invention also relates to a syringe having a body, a piston adapted to slide in the body, and a device as described above.
  • a third bead is present so that one of the beads is framed by two beads. There is therefore a lateral contact on both sides of a bead; this assembly is more efficient to stop the translation of the sheath relative to the interface; and it is less hyperstatic than those existing because one observes two contacts of reduced surface around the central bead.
  • the contact between two beads may be in a line so that sizing or adjustment problems are reduced. This solution is much more efficient than those known in which a bead is inserted into a hollow.
  • FIG. 1 shows an overall view of a syringe according to the state of the art described by the document WO 2004/014470 A1;
  • Figure 2 is a view of this state the technique revealing a retracted position of the needle
  • FIG. 3 is a detailed view of this state of the art showing the cooperation between the interface and the device sheath mounted on the top of the syringe;
  • Figure 4 is a sectional view of an embodiment of the invention.
  • one of the contact portion and the fixing portion comprise a third bead 18;
  • the bead of the other one of the contact portion and the fixing portion is in contact with both the third bead 18 and the other bead of that between the contact portion and the attachment portion which comprises the third bead; 18;
  • the contact portion comprises only the first bead 16, and wherein the fixing portion comprises the second bead 17 and the third bead 18;
  • the contact portion is cylindrical around the first bead 16;
  • the fixing portion is cylindrical around the second bead 17;
  • At least one of the beads has a longitudinal section in an arc of a circle
  • the sheath 8 comprises an inner channel 13 comprising a seat 10 configured to house a proximal end of the needle 19, said channel 13 having a section extending beyond the end of the opposite contact portion to the seat 10 said section having a transverse opening 14;
  • the sheath 8 is slidably mounted relative to the interface 3, the beads forming stops against the sliding;
  • the device does not include any O-ring between the sheath 8 and the interface 3.
  • Longitudinal direction 15 the long dimension of the syringe and / or the injection device; in general, the body of the syringe and possibly any other piece of the invention may have a symmetry around the longitudinal direction;
  • transverse term and the lateral term signify a direction perpendicular to the longitudinal direction 15;
  • needle means any sharp device for filling an injection function, including fluid injection into the human body or animal.
  • the device of the state the technique shown in Figure 1 typically comprises a syringe body 1 here substantially cylindrical in shape and having a proximal end with a mouthpiece for receiving a piston 6 and an end distal, opposite, for receiving an injection device provided with a needle.
  • the body 1 At its distal end, the body 1 comprises a narrowed section head produced by a shoulder 5.
  • the injection device is provided with a cap during storage. This protects the needle 19.
  • FIG. 2 shows the retraction function of the needle 19.
  • the piston 6 comprises, at its distal end, a device enabling it to cooperate with a portion of the injection device on which the In this way, when the piston 6 is brought sufficiently deep inside the body 1, it is attached to the integral part of the needle 19 and a subsequent sliding action of the piston 6 tending to the out of the body 1 retracts the needle 19 from the inside of the body 1 as shown in Figure 2.
  • a reduced section of the piston 6 can provide a breakable zone so as to break the piston and avoid too much clutter in this position. It is easy to understand that the needle 19 is thus protected, which offers increased safety with respect to the more traditional syringes.
  • FIG. 3 is a detail illustrating according to the state of the art a possibility of mounting the needle.
  • an interface 3 is mounted at the head of the body 1 and cooperates with a sheath 8 provided with an inner channel for receiving the needle 19.
  • the sheath 8 comprises securing means with the distal end of the piston 6. The contact between the interface 3 and the sheath 8 takes place without any particular provision in terms of sealing which can induce leaks or the need for an additional seal.
  • Figure 4 shows an embodiment of the invention is not limiting.
  • the interface 3 has an interior passage delimited by a wall January 1. A proximal portion of this passage may in particular be used for mounting the device of the invention on the head 4 of a syringe.
  • the head 4 also comprises a double wall for cooperation with the interface 3.
  • the inner passage of the interface 3 further receives the sheath 8 which extends in the longitudinal direction 15.
  • a channel 13 inside the sheath 8 allows the flow of fluid through so as to feed the needle 19 disposed at an upper portion in the form of a seat 10 of the sheath 8.
  • a cylinder-to-cylinder branch is advantageously formed with the proximal end of the needle 19. Between these two ends, the sheath 8 is made integral with the interface 3.
  • a contact portion of the outer wall 12 the sheath 8 cooperates with a fixing portion of the inner wall January 1 of the interface 3.
  • This cooperation is advantageously removable so as to allow a retracted configuration of the device as shown in the example of Figure 2.
  • the securing of the sheath 8 in the interface 3 can be configured to be overcome by sufficient effort, especially from a user during a phase of action on the piston, causing the sheath 8 once secured to the end of the piston 6.
  • beads 16, 17 are formed according to the invention.
  • bead means a portion in relief relative to the rest of the surface of the portion considered, this portion extending in the form of a ring forming a belt continues at a certain level along the longitudinal direction 15.
  • the bead may have an arcuate section as in the case of Figure 4.
  • Figure 4 shows a first bead 16 on the outer wall of the sheath 8 and a second bead 17 on the inner wall. 8.
  • the beads 16, 17 are configured to mate against one another to provide a cooperative surface for optimized sealing.
  • the combination of these beads makes it possible to form an abutment opposing, at least without the exercise of an external tensile force, the relative sliding of the two parts.
  • a third bead 18 is made, here on the interface 3.
  • the bead 16 is framed by the second and third beads 17, 18.
  • the bead 16 is preferably in simultaneous contact with the other two beads. It is understood that this arrangement precisely immobilizes the sheath 8 and ensures a double contact preventing leakage.
  • the rest of the contact and fastening portions of the sheath 8 and the interface 3 do not have any relief around the beads 16, 17, 18.
  • the stop and sealing function is concentrated on these beads. .
  • the sheath 8 has, in the zone of attachment with the interface 3 (comprising the beads), a cylindrical outer wall (it may also be frustoconical) on which the or beads carried by the sheath 8 are protruding.
  • the inner wall of the interface 3 has, in the zone of attachment with the interface 3, a cylindrical shape (it can also be frustoconical) on which or the beads carried by the interface 3 are projecting.
  • the cooperation is therefore centered on areas of circular section and the beads are projecting protuberances on a base surface of circular section.
  • the beads then cooperate in contact areas of small area, essentially circular lines.
  • the beads be configured to contact each other only, and not with other portions of the sheath and the interface.
  • the beads are all protruding relative to the portion of the sheath or the interface that carries them.
  • the portion carrying two beads comprises an intermediate zone between these beads, this zone being of cylindrical shape and / or configured so that there is no contact between this area and the bead of the other portion.
  • the sheath 8 extends through the entire interface 3 so as to open at a distal end on which is formed the seat 10, and at the a proximal end, inside the body 1 of the syringe.
  • a channel 13 advantageously extends so as to allow the flow of a fluid from the storage area within the body 1 to the needle 19 for injection.
  • the channel 13 opens laterally to admit the fluid in its interior. These may be transverse lumens allowing the entry of fluid when compressed by the action of the piston. The fluid can then pass through the rest of the channel 13 until it leaves the outside of the syringe.
  • the sheath 8 extends below the proximal end of the interface 3 towards the body 1 and penetrates inside the main volume of this body 1, below the shoulder 5.
  • the constituent parts of the sheath 8 and the interface 3 are preferably each one-piece and come from a single piece of material, this material is preferably a plastic material. It is understood that the beads can easily be manufactured integrally with each of these parts, by conformation in particular during the molding thereof.

Abstract

The invention concerns an injection device, comprising an interface (3) for mounting on a syringe body (1), the interface (3) comprising an internal passage delimited by an inner wall (11), a needle (19) and a sheath (8) for receiving said needle (19), said sheath (8) comprising an outer wall (12) provided with a contact portion of said sheath (8) in contact with an attachment portion of the inner wall of the interface (3), characterised in that the contact portion comprises a first bead (16) and in that the attachment portion comprises a second bead (17), the first and second beads (16, 17) each forming a ring protruding respectively on the contact portion and the attachment portion, the first bead (16) being in contact with the second bead (17).

Description

« Dispositif d'injection »  "Injection device"
DOMAINE DE L'INVENTION FIELD OF THE INVENTION
La présente invention est relative à un dispositif d'injection et à une seringue équipée d'un tel dispositif.  The present invention relates to an injection device and a syringe equipped with such a device.
Une application préférée concerne l'industrie des appareils et accessoires à destination médicale.  A preferred application is for the medical device and accessories industry.
ARRIERE-PLAN TECHNOLOGIQUE BACKGROUND
Dans le domaine médical, on connaît des dispositifs permettant la réalisation d'injection par l'intermédiaire d'une aiguille, ce terme étant ici entendu comme tout dispositif pointu permettant le passage d'un fluide en son sein en direction notamment du corps humain ou animal. Particulièrement, on connaît du document WO 2004/014470 A1 un tel dispositif sous la forme d'une seringue comprenant un corps et un piston pouvant coulisser dans le corps. Par ailleurs, pour réaliser l'injection, la seringue comprend un dispositif d'injection rapporté au niveau de la tête du corps de seringue et doté d'une aiguille. Un tel dispositif est illustré dans les figures 1 à 3. Le dispositif rapporté au niveau de la tête du corps de seringue comprend une partie permettant son montage sur ledit corps, sous forme d'interface mécanique et une partie sur laquelle l'aiguille est assemblée formant la gaine de réception de cette aiguille. La gaine est l'interface sont en contact. Néanmoins, suivant cette antériorité, l'aiguille est rétractable dans le corps de la seringue une fois les opérations d'injection terminées. Cette disposition offre une meilleure sécurité d'utilisation au dispositif médical. Pour parvenir à cette rétractation, la gaine portant l'aiguille est désolidarisée de l'interface comme le montre la figure 2. Le fait que la gaine et l'interface doivent passer d'une position où ils sont solidaires et étanches à une position de désolidarisation pose des difficultés d'étanchéité qui sont généralement résolues par des joints toriques rapportés. In the medical field, there are known devices for the realization of injection by means of a needle, this term being understood here as any pointed device allowing the passage of a fluid therein in the direction in particular of the human body or animal. Particularly, it is known from WO 2004/014470 A1 such a device in the form of a syringe comprising a body and a piston slidable in the body. In addition, to perform the injection, the syringe comprises an injection device attached to the head of the syringe body and provided with a needle. Such a device is illustrated in Figures 1 to 3. The device attached to the head of the syringe body comprises a part allowing its mounting on said body, in the form of mechanical interface and a part on which the needle is assembled forming the receiving sheath of this needle. The sheath is the interface are in contact. Nevertheless, according to this anteriority, the needle is retractable into the body of the syringe once the injection operations are complete. This arrangement provides better security of use to the medical device. To achieve this retraction, the sheath carrying the needle is separated from the interface as shown in Figure 2. The fact that the sheath and the interface must move from a position where they are secured and sealed to a position of Uncoupling poses sealing difficulties that are usually solved by reported O-rings.
Les techniques d'étanchéité ainsi utilisées augmentent sérieusement la complexité du montage des dispositifs et leurs coûts.  The sealing techniques thus used seriously increase the complexity of mounting the devices and their costs.
On connaît aussi du document WO A1 2013/067588 une seringue rétractable dans lequel la figure 10 montre une rétention mécanique d'une gaine solidaire de l'aiguille avec une pièce de base ; la pièce de base comporte un relief qui s'insère dans un creux de la gaine ; ce contact d'une saillie dans un creux est peu performant en termes d'étanchéité.  Document WO A1 2013/067588 also discloses a retractable syringe in which FIG. 10 shows a mechanical retention of a sheath integral with the needle with a base piece; the base piece has a relief which fits into a hollow of the sheath; this contact of a projection in a hollow is not very effective in terms of sealing.
L'invention permet de résoudre tout ou partie des inconvénients des techniques actuelles. RESUME DE L'INVENTION  The invention solves all or part of the disadvantages of current techniques. SUMMARY OF THE INVENTION
Un aspect de l'invention concerne un dispositif d'injection, comprenant une interface de montage sur un corps de seringue, l'interface comprenant un passage intérieur délimité par une paroi interne, une aiguille et une gaine de réception de ladite aiguille, ladite gaine comprenant une paroi externe dotée d'une portion de contact de ladite gaine contre une portion de fixation de la paroi interne de l'interface  One aspect of the invention relates to an injection device, comprising a mounting interface on a syringe body, the interface comprising an inner passage delimited by an inner wall, a needle and a receiving sheath of said needle, said sheath comprising an outer wall provided with a contact portion of said sheath against a fixing portion of the inner wall of the interface
De façon avantageuse, la portion de contact comprend un premier bourrelet et la portion de fixation comprend un deuxième bourrelet, les premier et deuxième bourrelets formant chacun un anneau en relief respectivement sur la portion de contact et la portion de fixation, le premier bourrelet étant au contact du deuxième bourrelet.  Advantageously, the contact portion comprises a first bead and the fixing portion comprises a second bead, the first and second bead each forming a ring in relief respectively on the contact portion and the fixing portion, the first bead being contact of the second bead.
L'invention concerne aussi une seringue dotée d'un corps, d'un piston apte à coulisser dans le corps, et d'un dispositif comme décrit précédemment.  The invention also relates to a syringe having a body, a piston adapted to slide in the body, and a device as described above.
Suivant un aspect, un troisième bourrelet est présent si bien que l'un des bourrelets se trouve encadré par deux bourrelets. Il y a donc un contact latéral de part et d'autre d'un bourrelet ; ce montage est plus performant pour arrêter la translation de la gaine par rapport à l'interface ; et il est moins hyperstatique que ceux existant car on observe deux contacts de surface réduite autour du bourrelet central. Le contact entre deux bourrelets peut être selon une ligne si bien que les problèmes de dimensionnement ou d'ajustement sont réduits. Cette solution est bien plus performante que celles connues dans lesquelles un bourrelet est inséré dans un creux. According to one aspect, a third bead is present so that one of the beads is framed by two beads. There is therefore a lateral contact on both sides of a bead; this assembly is more efficient to stop the translation of the sheath relative to the interface; and it is less hyperstatic than those existing because one observes two contacts of reduced surface around the central bead. The contact between two beads may be in a line so that sizing or adjustment problems are reduced. This solution is much more efficient than those known in which a bead is inserted into a hollow.
BREVE INTRODUCTION DES FIGURES BRIEF INTRODUCTION OF FIGURES
D'autres caractéristiques, buts et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui suit, et en regard des dessins annexés donnés à titre d'exemples non limitatifs et sur lesquels :  Other features, objects and advantages of the present invention will appear on reading the detailed description which follows, and with reference to the appended drawings given as non-limiting examples and in which:
• la figure 1 montre une vue globale d'une seringue selon l'état de la technique décrit par le document WO 2004 /014470 A1 ;  FIG. 1 shows an overall view of a syringe according to the state of the art described by the document WO 2004/014470 A1;
• la figure 2 est une vue de cet état la technique révélant une position rétractée de l'aiguille ;  Figure 2 is a view of this state the technique revealing a retracted position of the needle;
• la figure 3 est une vue de détail de cet état de la technique montrant la coopération entre l'interface et la gaine du dispositif montées sur le haut de la seringue ;  FIG. 3 is a detailed view of this state of the art showing the cooperation between the interface and the device sheath mounted on the top of the syringe;
• la figure 4 est une vue en coupe d'un mode de réalisation de l'invention.  • Figure 4 is a sectional view of an embodiment of the invention.
DESCRIPTION DETAILLEE DETAILED DESCRIPTION
Avant d'entrer dans le détail de formes préférées de réalisation de l'invention en référence aux dessins notamment, d'autres caractéristiques optionnelles de l'invention, qui peuvent être mises en œuvre de façon combinée selon toutes combinaisons ou de manière alternative, sont indiquées ci-après :  Before going into detail of preferred embodiments of the invention with reference to the drawings in particular, other optional features of the invention, which can be implemented in combination in any combination or alternatively, are indicated below:
- l'une parmi la portion de contact et la portion de fixation comporte un troisième bourrelet 18 ;  one of the contact portion and the fixing portion comprise a third bead 18;
- le troisième bourrelet 18 et l'autre bourrelet de celle parmi la portion de contact et la portion de fixation qui comprend le troisième bourrelet 18 encadrent le bourrelet de l'autre parmi la portion de contact et la portion de fixation ;  - The third bead 18 and the other bead of that of the contact portion and the fixing portion which comprises the third bead 18 flank the bead of the other of the contact portion and the fixing portion;
- le bourrelet de l'autre parmi la portion de contact et la portion de fixation est au contact à la fois du troisième bourrelet 18 et de l'autre bourrelet de celle parmi la portion de contact et la portion de fixation qui comprend le troisième bourrelet 18 ;  the bead of the other one of the contact portion and the fixing portion is in contact with both the third bead 18 and the other bead of that between the contact portion and the attachment portion which comprises the third bead; 18;
- la portion de contact comprend uniquement le premier bourrelet 16, et dans lequel la portion de fixation comprend le deuxième bourrelet 17 et le troisième bourrelet 18 ;  - The contact portion comprises only the first bead 16, and wherein the fixing portion comprises the second bead 17 and the third bead 18;
- la portion de contact est cylindrique autour du premier bourrelet 16 ; - la portion de fixation est cylindrique autour du deuxième bourrelet 17 ; the contact portion is cylindrical around the first bead 16; the fixing portion is cylindrical around the second bead 17;
- au moins un des bourrelets a une section longitudinale en arc de cercle ; at least one of the beads has a longitudinal section in an arc of a circle;
- la gaine 8 comprend un canal 13 intérieur comprenant un siège 10 configuré pour loger une extrémité proximale de l'aiguille 19, ledit canal 13 présentant une section s'étendant au-delà de l'extrémité de la portion de contact opposée au siège 10, ladite section présentant une ouverture transversale 14 ; the sheath 8 comprises an inner channel 13 comprising a seat 10 configured to house a proximal end of the needle 19, said channel 13 having a section extending beyond the end of the opposite contact portion to the seat 10 said section having a transverse opening 14;
- la gaine 8 est montée coulissante relativement à l'interface 3, les bourrelets formant butées à rencontre du coulissement ;  - The sheath 8 is slidably mounted relative to the interface 3, the beads forming stops against the sliding;
- le dispositif ne comprend aucun joint torique entre la gaine 8 et l'interface 3.  the device does not include any O-ring between the sheath 8 and the interface 3.
Pour la bonne compréhension de l'invention, on entendra par : For a good understanding of the invention, we will understand:
• direction longitudinale 15 : la dimension longue de la seringue et/ou du dispositif d'injection ; d'une manière générale, le corps de la seringue et éventuellement toute autre pièce de l'invention peut présenter une symétrie autour de la direction longitudinale ;  Longitudinal direction 15: the long dimension of the syringe and / or the injection device; in general, the body of the syringe and possibly any other piece of the invention may have a symmetry around the longitudinal direction;
• le terme transversal et le terme latéral signifient une direction perpendiculaire à la direction longitudinale 15 ;  The transverse term and the lateral term signify a direction perpendicular to the longitudinal direction 15;
• le terme aiguille s'entend de tout dispositif pointu permettant de remplir une fonction injection, notamment d'injection de fluide dans le corps humain ou animal.  • The term needle means any sharp device for filling an injection function, including fluid injection into the human body or animal.
Le dispositif de l'état la technique représenté à la figure 1 comporte de façon typique un corps de seringue 1 ici essentiellement de forme cylindrique et présentant une extrémité proximale dotée d'une embouchure pour la réception d'un piston 6 et d'une extrémité distale, opposée, pour la réception d'un dispositif d'injection muni d'une aiguille. À son extrémité distale, le corps 1 comporte une tête de section rétrécie produite par un épaulement 5. Avantageusement, le dispositif d'injection est muni d'un capuchon lors du stockage. Cela permet de protéger l'aiguille 19.  The device of the state the technique shown in Figure 1 typically comprises a syringe body 1 here substantially cylindrical in shape and having a proximal end with a mouthpiece for receiving a piston 6 and an end distal, opposite, for receiving an injection device provided with a needle. At its distal end, the body 1 comprises a narrowed section head produced by a shoulder 5. Advantageously, the injection device is provided with a cap during storage. This protects the needle 19.
À la figure 2, est représentée la fonctionnalité de rétractation de l'aiguille 19. Pour y parvenir, le piston 6 comporte, à son extrémité distale, un dispositif lui permettant de coopérer avec une portion du dispositif d'injection sur laquelle est montée l'aiguille 19. De cette façon, lorsque que le piston 6 est amené suffisamment profondément à l'intérieur du corps 1 , il s'arrime à la partie solidaire de l'aiguille 19 et une action ultérieure de coulissement du piston 6 tendant à le sortir du corps 1 permet de rétracter l'aiguille 19 de l'intérieur du corps 1 comme le montre la figure 2. Éventuellement, comme le représente la figure 2, une section réduite du piston 6 peut offrir une zone ruptable de sorte à casser le piston et éviter un trop fort encombrement dans cette position. On comprend aisément que l'aiguille 19 est ainsi protégée ce qui offre une sécurité accrue relativement aux seringues les plus traditionnelles. FIG. 2 shows the retraction function of the needle 19. In order to achieve this, the piston 6 comprises, at its distal end, a device enabling it to cooperate with a portion of the injection device on which the In this way, when the piston 6 is brought sufficiently deep inside the body 1, it is attached to the integral part of the needle 19 and a subsequent sliding action of the piston 6 tending to the out of the body 1 retracts the needle 19 from the inside of the body 1 as shown in Figure 2. Optionally, as shown in Figure 2, a reduced section of the piston 6 can provide a breakable zone so as to break the piston and avoid too much clutter in this position. It is easy to understand that the needle 19 is thus protected, which offers increased safety with respect to the more traditional syringes.
La figure 3 est un détail illustrant selon l'état la technique une possibilité de montage de l'aiguille. A cette figure, une interface 3 est montée au niveau de la tête du corps 1 et coopère avec une gaine 8 dotées d'un canal intérieur de réception de l'aiguille 19. À son extrémité opposée à la zone de réception de l'aiguille 19, la gaine 8 comporte des moyens d'arrimage avec l'extrémité distale du piston 6. Le contact entre l'interface 3 et la gaines 8 s'opère sans disposition particulière en termes d'étanchéité ce qui peut induire des fuites ou la nécessité d'un recours à un joint additionnel.  Figure 3 is a detail illustrating according to the state of the art a possibility of mounting the needle. In this figure, an interface 3 is mounted at the head of the body 1 and cooperates with a sheath 8 provided with an inner channel for receiving the needle 19. At its end opposite the receiving zone of the needle 19, the sheath 8 comprises securing means with the distal end of the piston 6. The contact between the interface 3 and the sheath 8 takes place without any particular provision in terms of sealing which can induce leaks or the need for an additional seal.
En contre-point de ce qui est représenté aux figures 1 à 3, la figure 4 présente un mode de réalisation de l'invention non limitatif.  In contrast to what is shown in Figures 1 to 3, Figure 4 shows an embodiment of the invention is not limiting.
L'interface 3 présente un passage intérieur délimité par une paroi 1 1 . Une portion proximale de ce passage peut notamment servir au montage du dispositif de l'invention sur la tête 4 d'une seringue. Dans le cas illustré, la tête 4 comporte par ailleurs une double paroi pour la coopération avec l'interface 3. Le passage intérieur de l'interface 3 reçoit en outre la gaine 8 qui s'étend suivant la direction longitudinale 15. Avantageusement, un canal 13 à l'intérieur de la gaine 8 permet la circulation de fluide au travers de sorte à alimenter l'aiguille 19 disposée au niveau d'une portion haute sous forme d'un siège 10 de la gaine 8. Au niveau de ce siège 10, on forme avantageusement un embranchement cylindre sur cylindre avec l'extrémité proximale de l'aiguille 19. Entre ces deux extrémités, la gaine 8 est rendue solidaire avec l'interface 3. Plus précisément, une portion de contact de la paroi extérieure 12 de la gaine 8 coopère avec une portion de fixation de la paroi interne 1 1 de l'interface 3. Cette coopération est avantageusement amovible de sorte à permettre une configuration rétractée du dispositif comme représenté dans l'exemple de la figure 2. Ainsi, la solidarisation de la gaine 8 dans l'interface 3 peut être configurée pour être surmontée par un effort suffisant, notamment de la part d'un utilisateur lors d'une phase d'action sur le piston, entraînant la gaine 8 une fois arrimée à l'extrémité du piston 6.  The interface 3 has an interior passage delimited by a wall January 1. A proximal portion of this passage may in particular be used for mounting the device of the invention on the head 4 of a syringe. In the case illustrated, the head 4 also comprises a double wall for cooperation with the interface 3. The inner passage of the interface 3 further receives the sheath 8 which extends in the longitudinal direction 15. Advantageously, a channel 13 inside the sheath 8 allows the flow of fluid through so as to feed the needle 19 disposed at an upper portion in the form of a seat 10 of the sheath 8. At this seat 10, a cylinder-to-cylinder branch is advantageously formed with the proximal end of the needle 19. Between these two ends, the sheath 8 is made integral with the interface 3. More specifically, a contact portion of the outer wall 12 the sheath 8 cooperates with a fixing portion of the inner wall January 1 of the interface 3. This cooperation is advantageously removable so as to allow a retracted configuration of the device as shown in the example of Figure 2. A insi, the securing of the sheath 8 in the interface 3 can be configured to be overcome by sufficient effort, especially from a user during a phase of action on the piston, causing the sheath 8 once secured to the end of the piston 6.
Pour produire cet assemblage, on forme, selon l'invention, des bourrelets 16, 17, To produce this assembly, beads 16, 17 are formed according to the invention,
18 sur la portion de contact et la portion de fixation de la gaine 8 et de l'interface 3. Un exemple de formation de ces bourrelets est illustré à la figure 4. On entend par bourrelets une partie en relief relativement au reste de la surface périphérique de la portion considérée, cette partie s'étendant sous la forme d'un anneau formant une ceinture continue à un certain niveau le long de la direction longitudinale 15. Par exemple, le bourrelet peut présenter une section en arc de cercle comme dans le cas de la figure 4. 18 on the contact portion and the fastening portion of the sheath 8 and the interface 3. An example of formation of these beads is illustrated in Figure 4. By bead means a portion in relief relative to the rest of the surface of the portion considered, this portion extending in the form of a ring forming a belt continues at a certain level along the longitudinal direction 15. By For example, the bead may have an arcuate section as in the case of Figure 4.
De manière minimale, deux bourrelets sont formés chacun sur l'une parmi la gaine 8 et l'interface 3. Ainsi, la figure 4 montre un premier bourrelet 16 sur la paroi externe de la gaine 8 et un deuxième bourrelet 17 sur la paroi interne de l'interface 8. Les bourrelets 16, 17 sont configurés pour s'appliquer l'un contre l'autre de sorte à produire une surface de coopération permettant une étanchéité optimisée. En outre, l'association de ces bourrelets permet de former une butée s'opposant, au moins sans l'exercice d'un effort de traction extérieure, au coulissement relatif des deux pièces. Dans le cas représenté, un troisième bourrelet 18 est réalisé, ici sur l'interface 3. Avantageusement, le bourrelet 16 est encadré par les deuxième et troisième bourrelets 17, 18. Le bourrelet 16 est, de préférence, au contact simultané des deux autres bourrelets. On comprend que cette disposition immobilise précisément la gaine 8 et assure un double contact faisant obstacle à des fuites.  Minimally, two beads are each formed on one of the sheath 8 and the interface 3. Thus, Figure 4 shows a first bead 16 on the outer wall of the sheath 8 and a second bead 17 on the inner wall. 8. The beads 16, 17 are configured to mate against one another to provide a cooperative surface for optimized sealing. In addition, the combination of these beads makes it possible to form an abutment opposing, at least without the exercise of an external tensile force, the relative sliding of the two parts. In the case shown, a third bead 18 is made, here on the interface 3. Advantageously, the bead 16 is framed by the second and third beads 17, 18. The bead 16 is preferably in simultaneous contact with the other two beads. It is understood that this arrangement precisely immobilizes the sheath 8 and ensures a double contact preventing leakage.
Avantageusement, le reste des portions de contact et de fixation de la gaine 8 et de l'interface 3 ne présente pas de relief autour des bourrelets 16, 17, 18. Ainsi, la fonction de butée et d'étanchéité est concentrée sur ces bourrelets.  Advantageously, the rest of the contact and fastening portions of the sheath 8 and the interface 3 do not have any relief around the beads 16, 17, 18. Thus, the stop and sealing function is concentrated on these beads. .
Suivant une possibilité illustrée par la figure 4, la gaine 8 présente, dans la zone de solidarisation avec l'interface 3 (comportant les bourrelets), une paroi extérieure cylindrique (elle peut être aussi tronconique) sur laquelle le ou les bourrelets portés par la gaine 8 sont en saillie. De même, la paroi intérieure de l'interface 3 présente, dans la zone de solidarisation avec l'interface 3, une forme cylindrique (elle peut être aussi tronconique) sur laquelle le ou les bourrelets portés par l'interface 3 sont en saillie.  According to a possibility illustrated in FIG. 4, the sheath 8 has, in the zone of attachment with the interface 3 (comprising the beads), a cylindrical outer wall (it may also be frustoconical) on which the or beads carried by the sheath 8 are protruding. Similarly, the inner wall of the interface 3 has, in the zone of attachment with the interface 3, a cylindrical shape (it can also be frustoconical) on which or the beads carried by the interface 3 are projecting.
De préférence, la coopération est donc centrée sur des zones de section circulaire et les bourrelets sont des protubérances en saillie sur une surface de base de section circulaire. Les bourrelets coopèrent alors suivant des zones de contact de faible surface, essentiellement des lignes circulaires. Eventuellement, il n'y a pas d'autre contact entre la gaine et l'interface dans la zone où les bourrelets sont présents, voire pas d'autre contact arrêtant la translation entre la gaine et l'interface sur leur longueur.  Preferably, the cooperation is therefore centered on areas of circular section and the beads are projecting protuberances on a base surface of circular section. The beads then cooperate in contact areas of small area, essentially circular lines. Optionally, there is no further contact between the sheath and the interface in the area where the beads are present, or no other contact stopping the translation between the sheath and the interface over their length.
Il est souhaitable que les bourrelets soient configurés pour qu'ils rentrent en contact entre eux uniquement, et non avec d'autres parties de la gaine et de l'interface.  It is desirable that the beads be configured to contact each other only, and not with other portions of the sheath and the interface.
D'une manière générale, les bourrelets sont tous en saillie relativement à la portion de la gaine ou de l'interface qui les porte. De préférence, la portion qui porte deux bourrelets comprend une zone intermédiaire entre ces bourrelets, cette zone étant de forme cylindrique et/ou configurée pour qu'il n'y ait pas de contact ente cette zone et le bourrelet de l'autre portion. In general, the beads are all protruding relative to the portion of the sheath or the interface that carries them. Preferably, the portion carrying two beads comprises an intermediate zone between these beads, this zone being of cylindrical shape and / or configured so that there is no contact between this area and the bead of the other portion.
On notera dans le cas représenté à la figure 4 que la gaine 8 s'étend au travers de l'ensemble de l'interface 3 de sorte à déboucher au niveau d'une extrémité distale sur laquelle est formé le siège 10, et au niveau d'une extrémité proximale, à l'intérieur du corps 1 de la seringue. Tout au long de la gaine 8, un canal 13 s'étend avantageusement de sorte à permettre l'écoulement d'un fluide depuis la zone de stockage à l'intérieur du corps 1 jusqu'à l'aiguille 19 pour l'injection. De préférence, à au moins une portion de la longueur de la gaine 8, le canal 13 débouche latéralement de sorte à admettre le fluide en son intérieur. Il peut s'agir de lumières transversales permettant l'entrée de fluide lorsqu'il est comprimé par l'action du piston. Le fluide peut alors transiter dans le reste du canal 13 jusqu'à sa sortie en dehors de la seringue. Avantageusement, la gaine 8 s'étend en deçà de l'extrémité proximale de l'interface 3 en direction du corps 1 et pénètre l'intérieur du volume principal de ce corps 1 , en dessous de l'épaulement 5.  Note in the case shown in Figure 4 that the sheath 8 extends through the entire interface 3 so as to open at a distal end on which is formed the seat 10, and at the a proximal end, inside the body 1 of the syringe. Throughout the sheath 8, a channel 13 advantageously extends so as to allow the flow of a fluid from the storage area within the body 1 to the needle 19 for injection. Preferably, at least a portion of the length of the sheath 8, the channel 13 opens laterally to admit the fluid in its interior. These may be transverse lumens allowing the entry of fluid when compressed by the action of the piston. The fluid can then pass through the rest of the channel 13 until it leaves the outside of the syringe. Advantageously, the sheath 8 extends below the proximal end of the interface 3 towards the body 1 and penetrates inside the main volume of this body 1, below the shoulder 5.
Les pièces constitutives de la gaine 8 et de l'interface 3 sont de préférence chacune monobloc et venue d'une seule pièce de matière, cette matière étant de préférence une matière plastique. On comprend que les bourrelets peuvent facilement être fabriqués intégralement avec chacune de ces pièces, par conformation notamment lors du moulage de celles-ci. The constituent parts of the sheath 8 and the interface 3 are preferably each one-piece and come from a single piece of material, this material is preferably a plastic material. It is understood that the beads can easily be manufactured integrally with each of these parts, by conformation in particular during the molding thereof.
REFERENCES REFERENCES
1 . Corps de seringue 1. Syringe body
2. Capuchon  2. Hood
3. Interface  3. Interface
4. Tête  4. Head
5. Epaulement  5. Shoulder
6. Piston  6. Piston
7. Zone d'arrimage  7. Stowage area
8. Gaine  8. Sheath
9. Extrémité proximale  9. Proximal end
10. Siège  10. Headquarters
1 1 . Paroi interne  1 1. Internal wall
12. Paroi externe  12. External wall
13. Canal  13. Canal
14. Ouverture transversale  14. Cross opening
15. Direction longitudinale  15. Longitudinal direction
16. Premier bourrelet  16. First bead
17. Deuxième bourrelet  17. Second bead
18. Troisième bourrelet  18. Third bead
19. Aiguille  19. Needle

Claims

REVENDICATIONS
Dispositif d'injection, comprenant une interface (3) de montage sur un corps (1 ) de seringue, l'interface (3) comprenant un passage intérieur délimité par une paroi interne (1 1 ), une aiguille (19) et une gaine (8) de réception de ladite aiguille (19), ladite gaine (8) comprenant une paroi externe (12) dotée d'une portion de contact de ladite gaine (8) contre une portion de fixation de la paroi interne de l'interface (3), dans lequel : Injection device, comprising an interface (3) for mounting on a body (1) of a syringe, the interface (3) comprising an internal passage delimited by an inner wall (1 1), a needle (19) and a sheath (8) receiving said needle (19), said sheath (8) comprising an outer wall (12) provided with a contact portion of said sheath (8) against a fixing portion of the inner wall of the interface (3), wherein:
- la portion de contact comprend un premier bourrelet (16) et que la portion de fixation comprend un deuxième bourrelet (17), les premier et deuxième bourrelets (16, 17) formant chacun un anneau en relief saillant respectivement sur la portion de contact et la portion de fixation, le premier bourrelet (16) étant au contact du deuxième bourrelet (17) ;  - The contact portion comprises a first bead (16) and the fixing portion comprises a second bead (17), the first and second beads (16, 17) each forming a raised ring projecting respectively on the contact portion and the fixing portion, the first bead (16) being in contact with the second bead (17);
- l'une parmi la portion de contact et la portion de fixation comporte un troisième bourrelet (18) formant un anneau en relief saillant sur celle parmi la portion de contact et la portion de fixation qui le porte;  - One of the contact portion and the fixing portion comprises a third bead (18) forming a raised ring protruding from that of the contact portion and the fastening portion which carries it;
- le troisième bourrelet (18) et l'autre bourrelet de celle parmi la portion de contact et la portion de fixation qui comprend le troisième bourrelet (18) encadrent le bourrelet de l'autre parmi la portion de contact et la portion de fixation ;  - The third bead (18) and the other bead of that of the contact portion and the fixing portion which comprises the third bead (18) frame the bead of the other of the contact portion and the fixing portion;
- le bourrelet de l'autre parmi la portion de contact et la portion de fixation est au contact à la fois du troisième bourrelet (18) et de l'autre bourrelet de celle parmi la portion de contact et la portion de fixation qui comprend le troisième bourrelet (18).  the bead of the other one of the contact portion and the fixing portion is in contact with both the third bead (18) and the other bead of that between the contact portion and the attachment portion which comprises the third bead (18).
Dispositif selon la revendication précédente, dans lequel la portion de contact comprend uniquement le premier bourrelet (16), et dans lequel la portion de fixation comprend le deuxième bourrelet (17) et le troisième bourrelet (18).  Device according to the preceding claim, wherein the contact portion comprises only the first bead (16), and wherein the fixing portion comprises the second bead (17) and the third bead (18).
Dispositif selon l'une des revendications précédentes, dans lequel la portion de contact est cylindrique autour du premier bourrelet (16).  Device according to one of the preceding claims, wherein the contact portion is cylindrical around the first bead (16).
Dispositif selon l'une des revendications précédentes, dans lequel la portion de fixation est cylindrique autour du deuxième bourrelet (17). Device according to one of the preceding claims, wherein the fixing portion is cylindrical around the second bead (17).
Dispositif selon l'une des revendications précédentes, dans lequel au moins un des bourrelets a une section longitudinale en arc de cercle. Device according to one of the preceding claims, wherein at least one of the beads has a longitudinal section in a circular arc.
Dispositif selon l'une des revendications précédentes, dans lequel la gaine (8) comprend un canal (13) intérieur comprenant un siège (10) configuré pour loger une extrémité proximale de l'aiguille (19), ledit canal (13) présentant une section s'étendant au-delà de l'extrémité de la portion de contact opposée au siège (10), ladite section présentant une ouverture transversale (14). Device according to one of the preceding claims, wherein the sheath (8) comprises an interior channel (13) comprising a seat (10) configured for housing a proximal end of the needle (19), said channel (13) having a section extending beyond the end of the opposed contact portion of the seat (10), said section having a transverse opening ( 14).
7. Dispositif selon l'une des revendications précédentes, dans lequel la gaine (8) est montée coulissante relativement à l'interface (3), les bourrelets formant butées à rencontre du coulissement. 7. Device according to one of the preceding claims, wherein the sheath (8) is slidably mounted relative to the interface (3), the beads forming stops against sliding.
8. Dispositif selon l'une des revendications précédentes, ne comprenant aucun joint torique entre la gaine (8) et l'interface (3). 8. Device according to one of the preceding claims, comprising no O-ring between the sheath (8) and the interface (3).
9. Dispositif selon l'une des revendications précédentes, dans lequel les premier, deuxième et troisième bourrelets (16, 17, 18) sont configurés pour qu'ils rentrent en contact uniquement entre eux. 9. Device according to one of the preceding claims, wherein the first, second and third beads (16, 17, 18) are configured to come into contact only with each other.
10. Seringue dotée d'un corps (1 ), d'un piston (6) apte à coulisser dans le corps (1 ), et d'un dispositif selon l'une des revendications précédentes. 10. Syringe having a body (1), a piston (6) slidable in the body (1), and a device according to one of the preceding claims.
EP17729384.2A 2016-06-29 2017-05-17 Injection device Withdrawn EP3478346A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1656054A FR3053255A1 (en) 2016-06-29 2016-06-29 INJECTION DEVICE
PCT/EP2017/061782 WO2018001625A1 (en) 2016-06-29 2017-05-17 Injection device

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EP3478346A1 true EP3478346A1 (en) 2019-05-08

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US (1) US11730893B2 (en)
EP (1) EP3478346A1 (en)
BR (1) BR112018077438B1 (en)
FR (1) FR3053255A1 (en)
RU (1) RU2769834C2 (en)
WO (1) WO2018001625A1 (en)

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Publication number Publication date
RU2019109277A3 (en) 2021-09-14
BR112018077438B1 (en) 2023-11-14
FR3053255A1 (en) 2018-01-05
WO2018001625A1 (en) 2018-01-04
BR112018077438A2 (en) 2019-04-02
RU2019109277A (en) 2020-09-29
US20210052824A1 (en) 2021-02-25
RU2769834C2 (en) 2022-04-06
US11730893B2 (en) 2023-08-22

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