Auto injector with cartridge locking system

Provided is an auto injector (4) for administering an injection of a medicament from a cartridge containing the medicament. The auto injector comprises a housing (6), a cartridge receiver (300) with a cartridge receiver compartment (302) configured to receive a cartridge assembly (600), with at leas...

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Bibliographische Detailangaben
Hauptverfasser:	Olesen, Jan, Jacobsen, Thorben Kvisgaard
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE
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Beschreibung
Zusammenfassung:	Provided is an auto injector (4) for administering an injection of a medicament from a cartridge containing the medicament. The auto injector comprises a housing (6), a cartridge receiver (300) with a cartridge receiver compartment (302) configured to receive a cartridge assembly (600), with at least one cartridge retention member (808), when inserted through a cartridge receiver opening (301) along a longitudinal axis (L) in a receiving direction. The cartridge receiver (300) has a passage (316) through which the at least one cartridge retention member (808) travels at least in the receiving direction, and a member (312) preventing movement beyond a retention position in a direction opposite of the receiving direction. The auto injector further comprises an elongated ejector (200) that is configured with an ejector support face (204) for supporting the cartridge or cartridge assembly (600), and a longitudinal ejector slot (228) extending towards the ejector support face (204) from an ejector rest portion (206). The elongated ejector (200) is suspended to move along the longitudinal direction and is spring-loaded in the direction opposite of the receiving direction, and an ejector lock (212) supported for turning at least a fraction of a revolution and maintained in a longitudinal position relative to the housing (6). The ejector lock (212) has an ejector lock support portion (214) that is configured to align with and slide along the longitudinal ejector slot (228) at a first angle and to be brought to align with the ejector rest portion (206) at a second angle. The ejector rest portion and the ejector lock support member in combination forms a stop that is disengaged at the first angle and engaged at the second angle. The stop prevents further movement of the rest portion beyond the support member in the receiving direction in order to maintain the position of the cartridge and thereby assist with administering a precise dose when the needle of the cartridge assembly penetrates a being's skin.