WO2011033155A1 - Disposable syringe - Google Patents

Disposable syringe Download PDF

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Publication number
WO2011033155A1
WO2011033155A1 PCT/ES2010/070267 ES2010070267W WO2011033155A1 WO 2011033155 A1 WO2011033155 A1 WO 2011033155A1 ES 2010070267 W ES2010070267 W ES 2010070267W WO 2011033155 A1 WO2011033155 A1 WO 2011033155A1
Authority
WO
WIPO (PCT)
Prior art keywords
syringe
needle
plunger
block
cavity
Prior art date
Application number
PCT/ES2010/070267
Other languages
Spanish (es)
French (fr)
Inventor
Juan Jose Soriano Azorin
Original Assignee
Juan Jose Soriano Azorin
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 Juan Jose Soriano Azorin filed Critical Juan Jose Soriano Azorin
Priority to DE112010000020T priority Critical patent/DE112010000020T5/en
Publication of WO2011033155A1 publication Critical patent/WO2011033155A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • 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    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston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
    • 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
    • A61M2005/3231—Proximal end of needle captured or embedded inside piston head, e.g. by friction or hooks

Definitions

  • the present invention relates to a disposable syringe, the obvious purpose of which is to constitute a means for injecting liquid medications, and which, as is conventional, includes a syringe body with its corresponding plunger, a needle holder and the needle itself. .
  • the object of the invention is to provide a disposable syringe with characteristics that make it impossible to reuse, the needle being hidden inside the syringe body.
  • 9703258 describing a disposable syringe, which as novel elements incorporates a needle retractor body inside the plunger, a spring associated with that body, as well as a special configuration of the needle holder body, which in combination with the retractor body of the needle makes it possible, once the drug has been injected, that is, once the plunger has reached its end in the syringe body, that the interlocking occurs between the aforementioned elements and the retraction into the needle, previous pulled back of the plunger.
  • European Patent 2282645 also referring to a disposable syringe with a retractable needle, can be cited, which in order to achieve the withdrawal of the needle after the end of the injection, novel means such as a special needle holder, a double hook for the hooking, on the one hand, with the aforementioned bushing and for the retraction of the needle once the injection has been carried out, although with a complex materialization as regards the characteristics of the referred elements and additional ones.
  • the syringe that has been recommended has been designed to solve the problem described above, based on a simple but effective solution, since the characteristics that define it allow, as in other conventional syringes, the retraction of the needle inwards once The injection is made, but the needle is located with a deviation from the longitudinal axis, which means that when the attempt is made to push it out again, the needle cannot exit, as it does not face the exit hole.
  • the syringe of the invention is characterized by incorporating a tack mounted on the front end of the syringe body, with the ability to axially move inwards and outwards, but that displacement is limited by means of stops belonging to the same block, which is located axially with an internal part topped in a trunk-conical shape, and equipped with a step as a stop, with an oblique arrangement with the function that will be exposed later, while externally it establishes a means of engagement and retention for the corresponding needle, that block being affected by an axial passage with a lateral bypass for the entry of the medication, by aspiration, and for the exit of said medication by impulsion of the corresponding plunger.
  • the plunger itself has at its end of axial confrontation to the block, a hole with a section of a diameter slightly smaller than the base of the trunk-conical inner end of the block, but with the possibility of introducing it inside the mentioned piston and reaching the section of the hole of greater diameter, being retained in it as a result of the step established between the two sections of different diameter established in the commented piston.
  • Figure 1. Shows a representation of the front part or end of the syringe in the rest position and with all the novelty features incorporated therein.
  • Figure 2. Shows a view like that of the previous figure, once the needle has been attached to the corresponding needle holder of the syringe.
  • Figure 3. It shows a view like that of the previous figures where the interlocking between the plunger of the syringe and the taco is shown, as well as the interlocking of the needle itself respecting the taco, so that the traction backwards of the The piston carries the drag into the needle and its deviation from the exit hole.
  • Figure 4 shows, finally, a sectional detail of the block that forms part of the syringe of the invention, as a fundamental element thereof.
  • the syringe of the invention is constituted by a body (1), as is conventional, with its corresponding piston (2), through which it is carried out, by axial displacement, firstly the extracting the medicinal liquid and subsequently injecting it, being that piston (2) affected by an axial passage (3) with a section (4) of smaller diameter forming, with the section (3) of greater diameter, a step (5 ), as shown clearly in Figure 1.
  • an axial cylindrical block (6) of general cylindrical configuration and two sections, one inside the body (1) of the syringe and another is mounted that remains on the outside, as can be clearly seen in the figures, so that the block (6) has the end of its inner section in a trunk-conical shape (7) with a step in the form of a stop (8), made obliquely, said taco (6) being provided with a perimeter projection (9) that constitutes a stop against the hole of the wall corresponding to the bottom or front part of the syringe body (1), preventing the outward exit of the taco ( 6), when making a stop with that shoulder or step (9) commented, while in its external part, the commented taco (6) presents another resale (10) also annular, in stop functions to prevent the introduction of the taco (6 ) inside the syringe body (1), when moving inwards, since it has been said that said block (6) is entitled to move in both directions, but limited in its displacements by those stops (9 and
  • block (6) has in its proximity to its free end with a cavity (11) delimited with respect to the outside by means of a throat (12) that defines oblique projections towards the interior, as will be explained later.
  • the needle (15) that must be connected to the syringe itself (1) through the plug (6) it has a head (15 ') that is housed in the body (16) by which it is attached to the holder ( 17) established in the front part of the body (1) of the syringe.
  • the needle (5) is coupled through the body ( 16), on the support (17), the suction of the medicament to be applied is carried out afterwards by pulling back the plunger (2), all without the head (15 ') of the needle reaching the cavity (11) of the block (6), and without it being connected to the plunger (2).
  • the plunger (2) will be pushed forward, injecting that medication, which will exit through the passage (14-13) established in the plug itself (6), logically coming out through the needle (15), so that when the emptying has occurred, the plunger (2) will reach the bottom or front end of the body (1) of the syringe, as represented in Figure 3, in which case and by initial thrust of the plunger (2) on the trunk-conical section of the inner end (7) of the block (6), the displacement of the latter will occur and thus the introduction of the head (15 ') of the needle (15) in the cavity (11) of the block (6), thus retaining the needle (15) because that head (15) cannot get out because it prevents throttling ( 12) or pins established in that area, so that when the end of the piston displacement (2) is reached, the trunk-conical end (7) of the block (6) has been introduced inside the passage (3) of the plunger, butt against the step (5) caused by the greater diameter of the steps

Abstract

The invention relates to a disposable syringe in which the needle, due to the movement of the plunger, is contained inside the body of the syringe after use. The syringe includes a chock mounted in an opening on the front of the body of the syringe, with stops that limit the axial movement thereof. The portion of the chock on the inside of the body of the syringe ends in a frusto-conical section with an oblique step. Said frusto-conical section interlocks with a step provided in an opening of the syringe plunger. The other end of the chock has a cavity with a throat which houses the head of the needle. Once the plunger pulls the needle inwards through the chock, the oblique step causes the latter, and thus the needle, to shift to one side relative to the opening, leaving the needle offset from the opening and unable to emerge to the outside.

Description

JERINGUILLA DESECHABLE  DISPOSABLE SYRINGE
D E S C R I P C I O N D E S C R I P C I O N
OBJETO DE LA INVENCION OBJECT OF THE INVENTION
La presente invención se refiere a una jeringuilla desechable, cuya evidente finalidad es la de constituir un medio para el inyectado de medicamentos líquidos, y que como es convencional incluye un cuerpo de jeringa con su correspondiente émbolo, un soporte de aguja y la aguja propiamente dicha. The present invention relates to a disposable syringe, the obvious purpose of which is to constitute a means for injecting liquid medications, and which, as is conventional, includes a syringe body with its corresponding plunger, a needle holder and the needle itself. .
El objeto de la invención es proporcionar una jeringuilla desechable con unas características tales que hacen imposible su reutilización, quedando la aguja oculta en el interior del cuerpo de la jeringuilla. The object of the invention is to provide a disposable syringe with characteristics that make it impossible to reuse, the needle being hidden inside the syringe body.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
Como es sabido, el personal sanitario en el inyectado de medicamentos, es decir cuando utiliza jeringuillas para cualquier menester, corren riesgo de contagio a través de las propias jeringuillas, de manera que para resolver estos problemas se utilizan de forma prácticamente en exclusiva jeringuillas desechables monouso, aunque a pesar de todo existe un riesgo de contagio para el personal sanitario, debido a que la manipulación de las jeringuillas usadas pueden producir pinchazos por descuidos, recibiendo los microorganismos que puedan existir en la jeringuilla. Asimismo existen jeringuillas que tras su uso la aguja queda oculta en el interior del cuerpo de la jeringuilla, impidiendo esos posibles pinchazos en la operación final de desechado. En tal sentido, pueden citarse el Modelo de Utilidad español UAs is known, the medical staff in the injected medication, that is when using syringes for any need, are at risk of contagion through the syringes themselves, so that to solve these problems, monouso disposable syringes are used almost exclusively , although in spite of everything there is a risk of contagion for the medical personnel, because the manipulation of the used syringes can produce punctures due to carelessness, receiving the microorganisms that may exist in the syringe. There are also syringes that after use the needle is hidden inside the syringe body, preventing those possible punctures in the final disposal operation. In this regard, the Spanish Utility Model U can be cited
9703258 que describe una jeringuilla desechable, que como elementos novedosos incorpora un cuerpo retraedor de la aguja en el interior del émbolo, un muelle asociado a ese cuerpo, así como una configuración especial del cuerpo porta-aguja, que en combinación con el cuerpo retraedor de la aguja posibilitan, una vez efectuado el inyectado del medicamento, es decir una vez que el émbolo ha alcanzado su extremo en el cuerpo de la jeringuilla, que se produzca el enclavamiento entre los elementos anteriormente referidos y la retracción hacia el interior de la aguja, previo traccionado hacia atrás del émbolo. 9703258 describing a disposable syringe, which as novel elements incorporates a needle retractor body inside the plunger, a spring associated with that body, as well as a special configuration of the needle holder body, which in combination with the retractor body of the needle makes it possible, once the drug has been injected, that is, once the plunger has reached its end in the syringe body, that the interlocking occurs between the aforementioned elements and the retraction into the needle, previous pulled back of the plunger.
Asimismo, puede citarse la Patente Europea 2282645, también referente a una jeringuilla desechable con aguja retráctil, que para conseguir el retraimiento de la aguja una vez finalizada la inyección, se utilizan medios novedosos tales como un casquillo especial porta-agujas, un gancho doble para el enganche, por una parte, con el casquillo anteriormente referido y para la retracción de la aguja una vez efectuada la inyección, aunque con una materialización compleja en cuanto a las características de los elementos referidos y otros adicionales. En cualquier caso, el problema que presentan tanto la jeringuilla del Modelo de Utilidad español anteriormente referido como de la Patente europea, también comentada, consiste en la necesidad de utilizar un muelle para la retracción de la aguja, es decir para la ocultación en el interior de la jeringuilla, y lo que es mas importante, el retraimiento se efectúa axialmente, como es lógico, pero manteniendo en esa posición a la aguja, es decir enfrentada a la salida, lo que posibilita que la aguja pueda salir de nuevo si se efectúa el empuje del émbolo hacia fuera, con los consiguientes riesgos para el personal sanitario que está manejando la jeringuilla. Likewise, European Patent 2282645, also referring to a disposable syringe with a retractable needle, can be cited, which in order to achieve the withdrawal of the needle after the end of the injection, novel means such as a special needle holder, a double hook for the hooking, on the one hand, with the aforementioned bushing and for the retraction of the needle once the injection has been carried out, although with a complex materialization as regards the characteristics of the referred elements and additional ones. In any case, the problem presented by both the syringe of the Spanish Utility Model referred to above and the European Patent, also commented, consists in the need to use a spring for needle retraction, that is, for concealment inside of the syringe, and more importantly, the withdrawal is carried out axially, as is logical, but keeping the needle in that position, that is to say facing the exit, which makes it possible for the needle to exit again if the piston thrust is carried out, with the consequent risks to the healthcare personnel who are handling the syringe.
DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION
La jeringuilla que se preconiza ha sido concebida para resolver la problemática anteriormente expuesta, en base a una solución sencilla pero eficaz, ya que las características que definen la misma permiten, como en otras jeringas convencionales, la retracción de la aguja hacia el interior una vez efectuada la inyección, pero quedando situada la aguja con una desviación con respecto al eje longitudinal, que hace que ante el intento de empuje hacia fuera de nuevo la aguja no pueda salir, al no quedar enfrentada con el orificio de salida. The syringe that has been recommended has been designed to solve the problem described above, based on a simple but effective solution, since the characteristics that define it allow, as in other conventional syringes, the retraction of the needle inwards once The injection is made, but the needle is located with a deviation from the longitudinal axis, which means that when the attempt is made to push it out again, the needle cannot exit, as it does not face the exit hole.
Mas concretamente, la jeringuilla de la invención se caracteriza por incorporar un taco montado sobre el extremo anterior del cuerpo de la jeringuilla, con facultad de desplazamiento axial hacia el interior y hacia el exterior, pero limitado ese desplazamiento por medio de unos topes pertenecientes al propio taco, el cual queda situado axialmente con una parte interna rematada en forma tronco-cónica, y dotada de un escalón en función de tope, con una disposición oblicua con la función que se expondrá con posterioridad, mientras que exteriormente establece un medio de enganche y retención para la aguja correspondiente, estando ese taco afectado de un paso axial con un derivación lateral para la entrada del medicamento, por aspiración, y para la salida de dicho medicamento por impulsión del correspondiente émbolo. More specifically, the syringe of the invention is characterized by incorporating a tack mounted on the front end of the syringe body, with the ability to axially move inwards and outwards, but that displacement is limited by means of stops belonging to the same block, which is located axially with an internal part topped in a trunk-conical shape, and equipped with a step as a stop, with an oblique arrangement with the function that will be exposed later, while externally it establishes a means of engagement and retention for the corresponding needle, that block being affected by an axial passage with a lateral bypass for the entry of the medication, by aspiration, and for the exit of said medication by impulsion of the corresponding plunger.
Por su parte, el émbolo propiamente dicho presenta en su extremo de enfrentamiento axial al taco, un orificio con un tramo de un diámetro ligeramente inferior a la base del extremo interior tronco-cónico del taco, pero con posibilidad de introducirse éste en el interior del comentado émbolo y alcanzar el tramo del orificio de mayor diámetro, quedando retenido en éste como consecuencia del escalón establecido entre los dos tramos de distintos diámetro establecidos en el émbolo comentado. For its part, the plunger itself has at its end of axial confrontation to the block, a hole with a section of a diameter slightly smaller than the base of the trunk-conical inner end of the block, but with the possibility of introducing it inside the mentioned piston and reaching the section of the hole of greater diameter, being retained in it as a result of the step established between the two sections of different diameter established in the commented piston.
De esta manera, si el extremo interno del émbolo alcanza el fondo, entonces se produce el acoplamiento con el tramo tronco-cónico del taco, previo desplazamiento de éste hacia el exterior y consiguiente enganche de la aguja en una cavidad establecida al efecto en el extremo anterior y externo del propio taco, de manera que una vez conseguida esa posición de enclavamiento, el traccionado hacia atrás del émbolo lleva consigo el arrastre del taco y por consiguiente de la aguja, de manera que en virtud del escalón oblicuo que determina el tramo tronco-cónico del taco, éste en su traccionado quedará situado con leve desvío que repercutirá en la propia aguja, quedando ésta desviada del orificio de entrada, lo que evitará que ante un intento de reutilización no se pueda llevar a cabo, como tampoco lógicamente podrá emerger hacia fuera la aguja al estar desfasada respecto al orificio de salida. In this way, if the internal end of the plunger reaches the bottom, then the coupling with the trunk-conical section of the block is produced, after its displacement towards the outside and consequently hooking the needle into a cavity established for this purpose at the end anterior and external of the block itself, so that once this interlocking position is achieved, the traction backwards of the plunger carries with it the drag of the block and consequently of the needle, so that by virtue of the oblique step that determines the trunk section -conical of the block, this one in its traction will be located with a slight deviation that will reverberate in the needle itself, leaving it deviated from the entrance hole, which will prevent that before an attempt to reuse it cannot be carried out, nor can it logically emerge out the needle when out of phase with respect to the exit hole.
DESCRIPCIÓN DE LOS DIBUJOS DESCRIPTION OF THE DRAWINGS
Para complementar la descripción que se seguidamente se va a realizar y con objeto de ayudar a una mejor comprensión de las características del invento, de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente: La figura 1.- Muestra una representación de la parte o extremo delantero de la jeringuilla en posición de reposo y con todas las características de novedad que incorpora la misma. To complement the description that is to be followed and in order to help a better understanding of the features of the invention, according to a preferred example of practical implementation thereof, a set of said description is attached as an integral part of said description. Drawings where, for illustrative and non-limiting purposes, the following has been represented: Figure 1.- Shows a representation of the front part or end of the syringe in the rest position and with all the novelty features incorporated therein.
La figura 2.- Muestra una vista como la de la figura anterior, una vez ha sido acoplada la aguja al correspondiente porta-agujas de la jeringuilla. Figure 2.- Shows a view like that of the previous figure, once the needle has been attached to the corresponding needle holder of the syringe.
La figura 3. -Muestra una vista como la de las figuras anteriores en donde se deja ver el enclavamiento entre el émbolo de la jeringuilla y el taco, así como el enclavamiento de la propia aguja respeto al taco, para que el traccionado hacia atrás del émbolo lleve consigo el arrastre hacia el interior de la aguja y su desvio respecto al orificio de salida. Figure 3. - It shows a view like that of the previous figures where the interlocking between the plunger of the syringe and the taco is shown, as well as the interlocking of the needle itself respecting the taco, so that the traction backwards of the The piston carries the drag into the needle and its deviation from the exit hole.
La figura 4.- Muestra, finalmente, un detalle en sección del taco que forma parte de la jeringuilla de la invención, como elemento fundamental de la misma. Figure 4 shows, finally, a sectional detail of the block that forms part of the syringe of the invention, as a fundamental element thereof.
REALIZACIÓN PREFERENTE DE LA INVENCIÓN PREFERRED EMBODIMENT OF THE INVENTION
Como se puede ver en las figuras referidas, la jeringuilla de la invención está constituida por un cuerpo (1), como es convencional, con su correspondiente émbolo (2), a través del cual se lleva a cabo, por desplazamiento axial, primeramente la extracción del líquido medicinal y posteriormente el inyectado del mismo, estando ese émbolo (2) afectado de un paso axial (3) con un tramo (4) de menor diámetro formando, con el tramo (3) de mayor diámetro, un escalón (5), como se deja ver claramente en la figura 1. En el extremo anterior del cuerpo (1) va montado, con facultad de desplazamiento axial, un taco axial (6) de configuración general cilindrica y que presenta dos tramos, uno que queda en el interior del cuerpo (1) de la jeringuilla y otro que queda por el exterior, como se deja ver claramente en las figuras, de manera que ese taco (6) presenta el extremo de su tramo interior de forma tronco-cónica (7) con un escalón en funciones de tope (8), realizado oblicuamente, estando dicho taco (6) dotado de un resalte perimetral (9) que constituye un tope contra el orificio de la pared correspondiente al fondo o parte anterior del cuerpo de la jeringuilla (1), impidiendo la salida hacia el exterior del taco (6), al hacer tope con ese resalte o escalón (9) comentado, mientras que en su parte externa, el comentado taco (6) presenta otro resale (10) también anular, en funciones de tope para impedir la introducción del taco (6) en el interior del cuerpo de la jeringuilla (1), cuando se desplaza hacia el interior, ya que se ha dicho que dicho taco (6) está facultado de desplazarse en ambos sentidos, pero limitado en sus desplazamientos por esos topes (9 y 10) comentados. As can be seen in the aforementioned figures, the syringe of the invention is constituted by a body (1), as is conventional, with its corresponding piston (2), through which it is carried out, by axial displacement, firstly the extracting the medicinal liquid and subsequently injecting it, being that piston (2) affected by an axial passage (3) with a section (4) of smaller diameter forming, with the section (3) of greater diameter, a step (5 ), as shown clearly in Figure 1. At the front end of the body (1), an axial cylindrical block (6) of general cylindrical configuration and two sections, one inside the body (1) of the syringe and another is mounted that remains on the outside, as can be clearly seen in the figures, so that the block (6) has the end of its inner section in a trunk-conical shape (7) with a step in the form of a stop (8), made obliquely, said taco (6) being provided with a perimeter projection (9) that constitutes a stop against the hole of the wall corresponding to the bottom or front part of the syringe body (1), preventing the outward exit of the taco ( 6), when making a stop with that shoulder or step (9) commented, while in its external part, the commented taco (6) presents another resale (10) also annular, in stop functions to prevent the introduction of the taco (6 ) inside the syringe body (1), when moving inwards, since it has been said that said block (6) is entitled to move in both directions, but limited in its displacements by those stops (9 and 10) commented.
Además, ese taco (6) cuenta en proximidad a su extremo libre con una cavidad (11) delimitada respecto al exterior mediante una garganta (12) que define unos salientes oblicuos hacia el interior, como mas adelante se expondrá. In addition, that block (6) has in its proximity to its free end with a cavity (11) delimited with respect to the outside by means of a throat (12) that defines oblique projections towards the interior, as will be explained later.
Por último, en relación con el taco (6) referido, decir que el mismo está afectado de un paso axial (13) con una desviación lateral (14), quedando ésta en el interior del cuerpo (1) de la jeringuilla, para permitir tanto el succionado del medicamento como la impulsión del mismo para ser inyectado. Finally, in relation to the taco (6) referred to, to say that it is affected by an axial passage (13) with a lateral deviation (14), this being inside the body (1) of the syringe, to allow both the suction of the drug and the impulse of the same to be injected.
En cuanto a la aguja (15) que debe vincularse a la propia jeringuilla (1) a través del taco (6), presenta una cabeza (15') que queda alojada en el cuerpo (16) mediante el que se acopla al soporte (17) establecido en la parte anterior del cuerpo (1) de la jeringuilla. De acuerdo con estas características, para utilizar la jeringuilla, en donde el émbolo (2) se servirá ligeramente retraído hacia atrás para impedir su contacto con el taco (6), se efectúa el acoplamiento de la aguja (5) a través del cuerpo (16), sobre el soporte (17), efectuándose a continuación mediante traccionado hacia atrás del émbolo (2) el succionado del medicamento que se pretende aplicar, todo ello sin que la cabeza (15') de la aguja alcance la cavidad (11) del taco (6), y sin que éste se vincule al émbolo (2). As for the needle (15) that must be connected to the syringe itself (1) through the plug (6), it has a head (15 ') that is housed in the body (16) by which it is attached to the holder ( 17) established in the front part of the body (1) of the syringe. According to these characteristics, to use the syringe, where the plunger (2) will be slightly retracted backwards to prevent its contact with the block (6), the needle (5) is coupled through the body ( 16), on the support (17), the suction of the medicament to be applied is carried out afterwards by pulling back the plunger (2), all without the head (15 ') of the needle reaching the cavity (11) of the block (6), and without it being connected to the plunger (2).
Una vez cargado el cuerpo (1) de la jeringuilla con el medicamento mediante succionado y como se ha dicho anteriormente, se empujará el émbolo (2) hacia delante, inyectando ese medicamento, que saldrá a través del paso (14- 13) establecido en el propio taco (6), saliendo lógicamente a través de la aguja (15), de manera que cuando se ha producido el vaciado, el émbolo (2) alcanzará el fondo o extremo anterior del cuerpo (1) de la jeringuilla, como se representa en la figura 3, en cuyo caso y por empuje inicial del émbolo (2) sobre el tramo tronco-cónico del extremo interno (7) del taco (6) ,se producirá el desplazamiento de éste hacia fuera y con ello la introducción de la cabeza (15') de la aguja (15) en la cavidad (11) del taco (6), quedando retenida así la aguja (15) en virtud de que esa cabeza (15) no puede salirse porque lo impide el estrangulamiento (12) o patillas establecidas en esa zona, de manera que cuando se llega al final del desplazamiento del émbolo (2), el extremo tronco-cónico (7) del taco (6) se ha introducido en el interior del paso (3) del émbolo, haciendo tope contra el escalón (5) originado por el mayor diámetro de los pasos (3 y 4) del comentado émbolo y en el escalón (8) de la base correspondiente al tramo tronco-cónico y extremo (7) del taco (6), de manera que en virtud de la oblicuidad de ese escalón (8) del taco (6) se produce un desvío de éste hacia un lado y con él de la aguja (15), lo que trae consigo que en el traccionado del émbolo (2) hacia atrás, y una vez introducida la aguja en el interior del cuerpo (1) de la jeringuilla, ésta quedará desfasada del orificio de salida como consecuencia de ese escalón oblicuo o descentrado (8) del émbolo (6), impidiendo que la aguja pueda salir de nuevo, aunque se presionara hacia delante el émbolo (2), evitando por lo tanto cualquier riesgo de pinchazo por parte de los sanitarios, e impidiendo lógicamente la reutilización de la jeringuilla. Once the syringe body (1) is loaded with the medication by suctioning and as stated above, the plunger (2) will be pushed forward, injecting that medication, which will exit through the passage (14-13) established in the plug itself (6), logically coming out through the needle (15), so that when the emptying has occurred, the plunger (2) will reach the bottom or front end of the body (1) of the syringe, as represented in Figure 3, in which case and by initial thrust of the plunger (2) on the trunk-conical section of the inner end (7) of the block (6), the displacement of the latter will occur and thus the introduction of the head (15 ') of the needle (15) in the cavity (11) of the block (6), thus retaining the needle (15) because that head (15) cannot get out because it prevents throttling ( 12) or pins established in that area, so that when the end of the piston displacement (2) is reached, the trunk-conical end (7) of the block (6) has been introduced inside the passage (3) of the plunger, butt against the step (5) caused by the greater diameter of the steps (3 and 4) of the commented plunger and in the step (8) of the base corresponding to the trunk-conical and end section (7) of the block (6), so that by virtue of the obliqueness of that step (8) of the block (6) a deflection occurs from it to the side and with it of the needle (15), which brings with it that in the traction of the plunger (2) back, and once the needle is inserted inside the body (1) of the syringe, it it will be offset from the exit orifice as a result of that oblique or offset step (8) of the plunger (6), preventing the needle from coming out again, even if the plunger (2) was pressed forward, therefore avoiding any risk of puncturing by the toilets, and logically preventing the reuse of the syringe.

Claims

R E I V I N D I C A C I O N E S R E I V I N D I C A C I O N E S
Ia.- Jeringuilla desechable, que siendo del tipo de las que quedan imposibilitadas de reutilizarse por introducción de la correspondiente aguja en el interior del cuerpo de la jeringuilla, contando ésta con el correspondiente émbolo para la aspiración e impulsión de los medicamentos, y contando en el extremo o base anterior del cuerpo de la jeringuilla con un soporte para el cuerpo de acoplamiento de la aguja, se caracteriza porque comprende un taco (6) montado en un orificio establecido centralmente en el frente del cuerpo (1) de la jeringuilla, cuyo taco (6) presenta unos topes (9 y 10) que posibilitan su desplazamiento hacia el interior y el exterior, en sentido axial, imposibilitando la total salida del taco (6) hacia el exterior y la total entrada del mismo hacia el interior del cuerpo de la jeringuilla (1); habiéndose previsto que la parte interior del taco (6) se remate en un tramo tronco-cónico (7) con un escalón perimetral y oblicuo (8), mientras que la parte externa se remata en una cavidad (11) con un estrangulamiento (12) en la misma, cavidad (11) destinada a recibir la cabeza (15') de la correspondiente aguja (15) una vez finalizada la inyección de medicamento por empuje del émbolo (2) en el interior del cuerpo (1) de la jeringuilla; habiéndose previsto también que el escalón oblicuo (8) del taco (6) establezca, en la introducción de la aguja en el interior del cuerpo (1) de la jeringuilla, un desvío axial de dicho taco y por lo tanto de la propia aguja (15) para impedir la salida de ésta una vez alojada en el interior del cuerpo (1) de la jeringuilla. I a .- Disposable syringe, which being the type of those that are unable to be reused by introducing the corresponding needle inside the syringe body, this one having the corresponding plunger for the aspiration and impulsion of the medications, and counting at the front end or base of the syringe body with a support for the needle coupling body, it is characterized in that it comprises a plug (6) mounted in a hole centrally established in the front of the body (1) of the syringe, whose block (6) has stops (9 and 10) that allow its movement towards the inside and outside, in an axial direction, making it impossible to fully exit the block (6) towards the outside and the total entry of the block into the interior of the syringe body (1); the inner part of the block (6) being provided to be finished off in a trunk-conical section (7) with a perimeter and oblique step (8), while the outer part is finished off in a cavity (11) with a throttling (12) ) in it, cavity (11) intended to receive the head (15 ') of the corresponding needle (15) after the injection of medication by pushing the plunger (2) into the body (1) of the syringe ; It is also provided that the oblique step (8) of the block (6) establishes, at the introduction of the needle inside the body (1) of the syringe, an axial deflection of said block and therefore of the needle itself ( 15) to prevent its exit once lodged inside the body (1) of the syringe.
2a.- Jeringuilla desechable, según reivindicación 1, caracterizada porque el émbolo (2) del cuerpo de la jeringuilla (1) cuenta con un paso axial (3) con un tramo extremo y anterior (4) de menor diámetro, determinando un escalón (5) con el resto del paso (3), en cuyo escalón (5) queda retenido el taco (6) a través de su tramo oblicuo (8), tras el desplazamiento hacia delante del émbolo (2) en la finalización de la inyección. 2 .- Disposable syringe according to claim 1, wherein the piston (2) of the syringe body (1) has an axial passage (3) with one end and front section (4) of smaller diameter, determining a step (5) with the rest of step (3), in whose step (5) the block (6) is retained through its oblique section (8), after the forward movement of the plunger (2) at the end of the injection.
3a.- Jeringuilla desechable, según reivindicación 1, caracterizada porque la correspondiente cabeza (15') de la aguja (15) queda retenida en la cavidad (11) establecida en el extremo anterior y externo del taco (6), y retenida por un estrangulamiento (12) de esa cavidad (11), arrastrando consigo a la aguja (5) con el taco (6), cuando éste se enclava en el escalón (5) del émbolo (2) y se lleva a cabo el desplazamiento hacia atrás de tal émbolo, tras el acabado de la inyección. 3 .- Disposable syringe according to claim 1, wherein said head (15 ') of the needle (15) is retained in the cavity (11) established in the front and outer end of the lug (6) and retained by a throttling (12) of that cavity (11), dragging the needle (5) with the plug (6), when it is locked in the step (5) of the plunger (2) and the displacement is carried out towards behind such a plunger, after finishing the injection.
4a.- Jeringuilla desechable, según reivindicación 1, caracterizada porque el taco (6) está afectado de un paso axial (13) con una derivación lateral (14) que permite la comunicación del interior del cuerpo (1) de la jeringuilla con el exterior, para permitir el succionado del medicamento y la posterior aplicación del mismo. 4 .- Disposable syringe according to claim 1, wherein the plug (6) is affected by an axial passage (13) with a side branch (14) allowing communication from inside the body (1) of the syringe with outside, to allow the sucking of the medicine and the subsequent application of the same.
PCT/ES2010/070267 2009-09-15 2010-04-27 Disposable syringe WO2011033155A1 (en)

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DE112010000020T DE112010000020T5 (en) 2009-09-15 2010-04-27 disposable syringe

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ES200930691A ES2379188B1 (en) 2009-09-15 2009-09-15 DISPOSABLE SYRINGE.
ESP200930691 2009-09-15

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US9604010B2 (en) 2011-11-09 2017-03-28 Unitract Syringe Pty Ltd Retractable syringe needle

Citations (6)

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US4804370A (en) * 1987-03-13 1989-02-14 Habley Medical Technology Corporation Disease control syringe having a retractable needle
US5536253A (en) * 1994-07-15 1996-07-16 Habley Medical Technology Corporation Pre-filled safety syringe having a retractable needle
ES2108408T3 (en) * 1993-07-26 1997-12-16 Finestyle Properties Limited SYRINGE AVAILABLE WITH A RETRACTABLE NEEDLE.
WO2002087671A1 (en) * 2001-05-02 2002-11-07 Finestyle Properties Limited Disposable retractable-needle syringe
US20070043322A1 (en) * 2005-07-28 2007-02-22 Acxing Industrial Co., Ltd. Disposable safety syringe structure
ES2302941T3 (en) * 2002-05-27 2008-08-01 Mb Innovation INJECTION DEVICE FOR A SINGLE USE INTENDED TO BE FILLED PREVIOUSLY.

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Publication number Priority date Publication date Assignee Title
ES1039049Y (en) 1997-12-16 1999-03-16 Calas Sanz Ramon Vicente PERFECTED DISPOSABLE SYRINGE.
WO2009143845A2 (en) 2008-05-26 2009-12-03 Fertin Pharma A/S Flavor impregnation of a chewing gum core

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
US4804370A (en) * 1987-03-13 1989-02-14 Habley Medical Technology Corporation Disease control syringe having a retractable needle
ES2108408T3 (en) * 1993-07-26 1997-12-16 Finestyle Properties Limited SYRINGE AVAILABLE WITH A RETRACTABLE NEEDLE.
US5536253A (en) * 1994-07-15 1996-07-16 Habley Medical Technology Corporation Pre-filled safety syringe having a retractable needle
WO2002087671A1 (en) * 2001-05-02 2002-11-07 Finestyle Properties Limited Disposable retractable-needle syringe
ES2302941T3 (en) * 2002-05-27 2008-08-01 Mb Innovation INJECTION DEVICE FOR A SINGLE USE INTENDED TO BE FILLED PREVIOUSLY.
US20070043322A1 (en) * 2005-07-28 2007-02-22 Acxing Industrial Co., Ltd. Disposable safety syringe structure

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ES2379188B1 (en) 2013-01-30
DE112010000020T5 (en) 2012-07-26
ES2379188A1 (en) 2012-04-23

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