AUTO-INJECTOR WITH PREVENT ACTIVATION CAP Russian patent published in 2022 - IPC A61M5/315 

FIELD: medical equipment.

SUBSTANCE: invention relates to medical equipment. The drug delivery device comprises a housing; a syringe assembly containing a barrel, a stopper, and a cannula. The site of the syringe assembly is located inside the housing. The drive unit is configured to move the stopper inside the cylinder when the drive unit is actuated. The needle cover has a pre-use position in which the cannula is located within the needle cover, an actuation position in which the needle cover operates the drive assembly, and a post-use position in which the cannula is positioned within the needle cover. The cap accommodates the needle cover portion and is configured to prevent the needle cover from moving from the pre-use position to the firing position. The lever trigger moves between a locked position in which actuation of the drive assembly is prevented and a released position in which actuation of the drive assembly is permitted. In this case, the needle cover is engaged with the lever trigger and moves the lever trigger to the released position when the needle cover moves to the firing position. The trigger lever is rotatable about a pivot axis between a locked position and a released position, the pivot axis extending perpendicular to the longitudinal axis of the drug delivery device.

EFFECT: providing automatic activation of the injection mechanism and automatic guarding of the needle after use, eliminating unintentional contact with the needle.

13 cl, 49 dwg