Disposable injector with at least one support rod

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/30 (2006.01) A61M 5/20 (2006.01)

Patent

CA 2692563

The invention relates to a disposable injector with a housing (10) in which are arranged at least one mechanical spring energy reservoir (50), at least one cylinder/piston unit (100), at least one piston-actuating ram, and at least one trigger unit. The spring-loaded piston-actuating ram is supported on the housing via at least one support rod (21), wherein the contact zone located between an individual support rod and the piston-actuating ram represents a wedge gear pairing that forces the respective support rod radially outwards. The support rod or support rods bear on at least one trigger element (82) that is mounted on the housing and positioned in a locking position. The trigger element can be brought by displacement into a triggering position that releases the piston-actuating ram.

L'invention concerne un instrument d'injection à usage unique comprenant un boîtier (10) dans lequel sont disposés au moins un accumulateur d'énergie à ressort mécanique (50) au moins une unité cylindre-piston (100), au moins un poinçon d'actionnement du piston et au moins une unité de déclenchement. Le poinçon d'actionnement du piston sollicité par ressort s'appuie par le biais d'au moins une barre de support (21) sur le boîtier et la zone de contact située entre une barre de support individuelle et le poinçon d'actionnement du piston constitue une paire de transmissions à clavette poussant radialement vers l'extérieur la barre de support respective. La ou les barres de support s'appliquent contre au moins un élément de déclenchement (82) monté sur le boîtier et positionné dans une position de blocage. L'élément de déclenchement peut être amené par coulissement dans une position de déclenchement libérant le poinçon d'actionnement du piston.

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