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EP0659093A1 - Needle system fastening mechanism - Google Patents

Needle system fastening mechanism

Info

Publication number
EP0659093A1
EP0659093A1 EP94919546A EP94919546A EP0659093A1 EP 0659093 A1 EP0659093 A1 EP 0659093A1 EP 94919546 A EP94919546 A EP 94919546A EP 94919546 A EP94919546 A EP 94919546A EP 0659093 A1 EP0659093 A1 EP 0659093A1
Authority
EP
European Patent Office
Prior art keywords
click
carpule
holder
fastening mechanism
needle
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.)
Ceased
Application number
EP94919546A
Other languages
German (de)
French (fr)
Inventor
Fritz Kirchhofer
Willy Michel
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.)
Tecpharma Licensing AG
Original Assignee
Disetronic Licensing AG
Disetronic AG
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 Disetronic Licensing AG, Disetronic AG filed Critical Disetronic Licensing AG
Priority to DE9422392U priority Critical patent/DE9422392U1/en
Publication of EP0659093A1 publication Critical patent/EP0659093A1/en
Ceased 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
    • A61M5/348—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub snap lock, i.e. upon axial displacement of needle assembly

Definitions

  • the invention relates to a fastening mechanism for needle systems according to the preamble of patent claim 1.
  • the known injection device is used to inject selectable amounts of liquid from an ampoule or carpule equipped with a piston.
  • the needles are inserted by screwing on according to the prior art.
  • the rear end of the needle pierces the membrane, which enables medication to be expelled through the needle when the stopper is moved forward.
  • the disadvantage here is that rubber abrasion occurs when the needle is screwed on by means of a rotary movement. These rubbed rubber particles can often be found in the drug and can be injected into the human body.
  • the invention seeks to remedy this.
  • the invention has for its object to provide a fastening mechanism for needle systems of injection devices, through which a simple and hygienically clean solution is created.
  • the invention solves the stated problem with a click closure, with which the needle is simply connected to the cartridge or the injection device without rotating movement, which has the features of claim 1.
  • the fastening mechanism with click closure comes about through a fastening structure with click cams or catches on the needle holder and corresponding counter elements on the carpule or the carpule holder containing the carpule.
  • FIG. 1 shows a needle holder according to the prior art.
  • Fig. 3 shows a carpule
  • the needle holder is composed of the sleeve 6 provided with an internal thread 10 or with an external thread (not shown) and the needle receiving bearing 11 in which the needle 7 is held. Both parts are made in one piece.
  • the internal thread is screwed onto the mating thread of the cartridge, causing the needle to pierce the rubber membrane and medication to be expelled through the needle.
  • this type of fastening has the disadvantage that rubbed rubber particles can often be found in the medication.
  • the needle holder 3 shown in FIG. 2 avoids this problem.
  • the needle holder 3 consists of a sleeve 6 with a needle receiving bearing 8.
  • the sleeve contains at least two click holders 2 with click cams 1 formed thereon.
  • the needle holder 3 forms a click lock by pushing the needle holder 3 onto the carpule 4 is and the click cams 1 engage resiliently in the threads of the carpule 4.
  • the needle holder 3 can be unscrewed by rotating the carpule 4 or a carpule holder containing the carpule 4 or can also be pulled off with force.
  • the click cams l are arranged so that they correspond approximately to the pitch of the thread.
  • the click holders 2 are recessed so that in the case of an unfavorable positioning, that is, when the click cams (1) come to rest on the thread tip, the click holder 2 does not look out over the outer edge of the needle holder 3.
  • Distributed around the circumference of the needle holder 3 are at least two or three or more click holders 2 at a uniform angular distance from one another.

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

A needle system fastening mechanism has a cartridge ampoule (4) as liquid-containing system and a needle holder (3). The needle holder (3) is snapped on the cartridge ampoule (4) or on a cartridge ampoule holder which contains the cartridge ampoule (4) by means of a snap closure. This fastening mechanism allows medicaments to be injected in perfect hygienic conditions.

Description

Befestiqun smechanismus für NadelsystemeFastening mechanism for needle systems
Die Erfindung bezieht sich auf einen Befeεtigungsmechanismus für Nadelsysteme gemäss dem Oberbegriff des Patentanspruchs 1.The invention relates to a fastening mechanism for needle systems according to the preamble of patent claim 1.
Befestigungsmechanismen für Nadelsysteme sind für Injektions¬ geräte (im folgenden oft kurz Gerät genannt) bekannt. Das bekannte Injektionsgerät dient zum Injizieren jeweils wählbarer Flüssigkeitsmengen aus einer mit einem Kolben ausgerüsteten Ampulle oder Karpule.Fastening mechanisms for needle systems are known for injection devices (hereinafter often referred to as device). The known injection device is used to inject selectable amounts of liquid from an ampoule or carpule equipped with a piston.
Bei Karpulen mit einer Durchstechmembrane aus Gummi werden die Nadeln durch Aufschrauben eingesetzt nach dem Stand der Technik. Durch das Aufschrauben der Nadel auf die Karpule durchsticht das hintere Ende der Nadel die Membrane wodurch ermöglicht wird, dasε beim Vorwärtsbewegen des Stopfens Medikament durch die Nadel ausgestossen werden kann.In the case of cartridges with a rubber piercing membrane, the needles are inserted by screwing on according to the prior art. By screwing the needle onto the carpule, the rear end of the needle pierces the membrane, which enables medication to be expelled through the needle when the stopper is moved forward.
Nachteilig dabei ist, dass durch Aufschrauben der Nadel mittels Drehbewegung Gummiabrieb entsteht. Diese abgeriebenen Gummipartikel sind oft im Medikament zu finden und können durch eine Injektion in den menschlichen Körper befördert werden. Hier will die Erfindung Abhilfe schaffen. Der Erfindung liegt die Aufgabe zugrunde, einen Befestigungsmechanismus für Nadelsysteme von Injektionsgeräten anzugeben, durch den eine einfache und hygienisch saubere Lösung geschaffen wird.The disadvantage here is that rubber abrasion occurs when the needle is screwed on by means of a rotary movement. These rubbed rubber particles can often be found in the drug and can be injected into the human body. The invention seeks to remedy this. The invention has for its object to provide a fastening mechanism for needle systems of injection devices, through which a simple and hygienically clean solution is created.
Die Erfindung löst die gestellte Aufgabe mit einem Klickverschluss, mit dem die Nadel ohne Drehbewegung einfach mit der Karpule oder dem Injektionsgerät verbunden wird, welcher die Merkmale des Anspruchs 1 aufweist.The invention solves the stated problem with a click closure, with which the needle is simply connected to the cartridge or the injection device without rotating movement, which has the features of claim 1.
Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, dass dank des erfindungsgemässen Befestigungs¬ mechanismus ein hygienisch einwandfreies Applizieren von Medikamenten durch Injektion möglich ist.The advantages achieved by the invention are essentially to be seen in the fact that, thanks to the fastening mechanism according to the invention, it is possible to administer medication in a perfectly hygienic manner by injection.
Der Befestigungsmechanismus mit Klickverschluss kommt durch eine Befestigungsstruktur mit Klicknocken oder Rasten auf dem Nadel¬ halter und entsprechenden gegensätzlich dazu ausgebildeten Gegenelementen auf der Karpule oder dem die Karpule enthaltenden Karpulenhalter zustande.The fastening mechanism with click closure comes about through a fastening structure with click cams or catches on the needle holder and corresponding counter elements on the carpule or the carpule holder containing the carpule.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen gekennzeichnet.Further advantageous embodiments of the invention are characterized in the dependent claims.
Ein Ausführungsbeispiel der Erfindung ist in den Figuren dargestellt. Es zeigen:An embodiment of the invention is shown in the figures. Show it:
Fig. 1 einen Nadelhalter nach dem Stand der Technik;1 shows a needle holder according to the prior art.
Fig. 2 den erfindungsgemässen Nadelhalter; und2 shows the needle holder according to the invention; and
Fig. 3 eine Karpule.Fig. 3 shows a carpule.
Nach dem Stand der Technik ist der Nadelhalter zusammengesetzt aus der mit einem Innengewinde 10 bzw. mit einem nicht gezeichneten Aussengewinde versehenen Hülse 6 und dem Nadelaufnahmelager 11, in dem die Nadel 7 gehalten ist. Beide Teile sind zusammen einstückig hergestellt. Das Innengewinde wird auf das Gegengewinde der Karpule aufgeschraubt, wodurch die Nadel die Gummimembrane durchsticht und Medikament durch die Nadel ausgestossen werden kann. Gleichzeitig ist durch diese Befestigungsart der Nachteil verknüpft, dass oft abgeriebene Gummipartikel im Medikament zu finden sind.According to the prior art, the needle holder is composed of the sleeve 6 provided with an internal thread 10 or with an external thread (not shown) and the needle receiving bearing 11 in which the needle 7 is held. Both parts are made in one piece. The internal thread is screwed onto the mating thread of the cartridge, causing the needle to pierce the rubber membrane and medication to be expelled through the needle. At the same time, this type of fastening has the disadvantage that rubbed rubber particles can often be found in the medication.
Der in Figur 2 gezeigte Nadelhalter 3 vermeidet dieses Problem. Der Nadelhalter 3 besteht aus einer Hülse 6 mit einem Nadelaufnahmelager 8. Die Hülse enthält mindestens zwei Klickhalter 2 mit daran ausgebildeten Klicknocken 1. Zusammen mit dem Aussengewinde der Karpule 4 bildet der erfindungsgemässe Nadelhalter 3 einen Klickverschluss, indem der Nadelhalter 3 auf die Karpule 4 aufgesteckt wird und die Klicknocken 1 in die Gewindegänge der Karpule 4 federnd eingreifen. Der Nadelhalter 3 kann durch Drehen von der Karpule 4 oder einem die Karpule 4 enthaltenden Karpulenhalter abgeschraubt werden oder auch mit Kraft abgezogen werden. Die Klicknocken l sind so angeordnet, dass sie in etwa der Steigung des Gewindes entsprechen. Die Klickhalter 2 sind so vertieft angeordnet, dass bei einer ungünstigen Positionierung, wenn also die Klicknocken (1) auf der Gewindespitze zu liegen kommen, der Klickhalter 2 nicht über den äusseren Rand des Nadelhalters 3 herausschaut.The needle holder 3 shown in FIG. 2 avoids this problem. The needle holder 3 consists of a sleeve 6 with a needle receiving bearing 8. The sleeve contains at least two click holders 2 with click cams 1 formed thereon. Together with the external thread of the carpule 4, the needle holder 3 according to the invention forms a click lock by pushing the needle holder 3 onto the carpule 4 is and the click cams 1 engage resiliently in the threads of the carpule 4. The needle holder 3 can be unscrewed by rotating the carpule 4 or a carpule holder containing the carpule 4 or can also be pulled off with force. The click cams l are arranged so that they correspond approximately to the pitch of the thread. The click holders 2 are recessed so that in the case of an unfavorable positioning, that is, when the click cams (1) come to rest on the thread tip, the click holder 2 does not look out over the outer edge of the needle holder 3.
Am Umfang des Nadelhalters 3 verteilt sind mindestens zwei oder drei oder mehr Klickhalter 2 in einem gleichmässigen Winkelabstand zueinander angeordnet. Distributed around the circumference of the needle holder 3 are at least two or three or more click holders 2 at a uniform angular distance from one another.

Claims

PatentansprücheClaims
1) Befestigungsmechanismus für Nadelsysteme mit einer Karpule (4) als System das Flüssigkeit enthält und einem Nadelhalter (3), dadurch gekennzeichnet, dass der Nadelhalter (3) über einen Klickverschluss (1,2) auf die Karpule (4) oder einen die Karpule (4) enthaltenden Karpulenhalter aufgeklickt wird.1) Fastening mechanism for needle systems with a carpule (4) as a system that contains liquid and a needle holder (3), characterized in that the needle holder (3) has a click closure (1, 2) on the carpule (4) or on the carpule (4) containing cartridge holder is clicked on.
2) Befestigungsmechanismus nach Anspruch 1, dadurch gekennzeichnet, dass der Klickverschluss (1,2) durch eine Befestigungsstruktur mit Klicknocken oder Rasten auf dem Nadelhalter (3) und entsprechenden gegensätzlich dazu ausgeprägten Gegenelementen auf der Karpule (4) oder den die Karpule (4) enthaltenden Karpulenhalter zustande kommt.2) Fastening mechanism according to claim 1, characterized in that the click closure (1,2) by a fastening structure with click cams or catches on the needle holder (3) and corresponding opposing elements on the carpule (4) or the carpule (4) containing cartridge holder comes about.
3) Befestigungsmechanismus nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Klickverschluss (1,2) gebildet wird aus dem Klickhalter (2) mit dem Klicknocken (1) im Nadelhalter (3) und einem Gewinde (5) oder einem Hinterschnitt der Karpule (4) bzw. einem die Karpule (4) enthaltenden Karpulenhalter.3) Fastening mechanism according to claim 1 or 2, characterized in that the click closure (1,2) is formed from the click holder (2) with the click cam (1) in the needle holder (3) and a thread (5) or an undercut of the carpule (4) or a carpule holder containing the carpule (4).
4) Befestigungsmechanismus nach einem der Ansprüche l bis 3, dadurch gekennzeichnet, dass der Nadelhalter (3) durch Drehen von der Karpule (4) geschraubt werden kann.4) Fastening mechanism according to one of claims l to 3, characterized in that the needle holder (3) can be screwed by turning the carpule (4).
5) Befestigungsmechanismus nach Anspruch 1 bis 4, dadurch gekennzeichnet, dass die Klicknocken (1) so angeordnet sind, dass sie in etwa der Steigung des Gewindes (5) entsprechen. 6) Befestigungsmechanismus nach Anspruch 1 bis 5, dadurch gekennzeichnet, dass die Klickhalter (2) so vertieft angeordnet sind, dass bei einer Positionierung von Klicknocken (l) auf der Gewindespitze, der Klickhalter (2) nicht über den äusseren Rand des Nadelhalters (3) herausschaut.5) Fastening mechanism according to claim 1 to 4, characterized in that the click cams (1) are arranged so that they correspond approximately to the pitch of the thread (5). 6) Fastening mechanism according to claim 1 to 5, characterized in that the click holder (2) are arranged so recessed that when clicking cams (l) are positioned on the thread tip, the click holder (2) does not extend over the outer edge of the needle holder (3 ) looks out.
7) Befestigungsmechanismus nach Anspruch 1 bis 6, dadurch gekennzeichnet, dass mindestens zwei Klickhalter (2) mit Klicknocken (1) vorgesehen sind. 7) Fastening mechanism according to claim 1 to 6, characterized in that at least two click holders (2) with click cams (1) are provided.
EP94919546A 1993-07-09 1994-07-08 Needle system fastening mechanism Ceased EP0659093A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9422392U DE9422392U1 (en) 1993-07-09 1994-07-08 Fastening mechanism for needle systems

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2067/93A CH685677A5 (en) 1993-07-09 1993-07-09 Attachment mechanism for needle systems.
CH2067/93 1993-07-09
PCT/CH1994/000146 WO1995001812A1 (en) 1993-07-09 1994-07-08 Needle system fastening mechanism

Publications (1)

Publication Number Publication Date
EP0659093A1 true EP0659093A1 (en) 1995-06-28

Family

ID=4225126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94919546A Ceased EP0659093A1 (en) 1993-07-09 1994-07-08 Needle system fastening mechanism

Country Status (5)

Country Link
US (1) US5611786A (en)
EP (1) EP0659093A1 (en)
JP (1) JPH08501242A (en)
CH (1) CH685677A5 (en)
WO (1) WO1995001812A1 (en)

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Also Published As

Publication number Publication date
WO1995001812A1 (en) 1995-01-19
CH685677A5 (en) 1995-09-15
US5611786A (en) 1997-03-18
JPH08501242A (en) 1996-02-13

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