DISPOSABLE SYRINGE-PEN FOR SEVERAL DOSES Russian patent published in 2017 - IPC A61M5/20 

FIELD: medical equipment.

SUBSTANCE: invention relates to medical equipment, namely to syringe-pens for drug injection. Syringe-pen includes: casing; master dose controller, made with possibility of rotation relative to casing; fixing assembly arranged in casing and having gear ratchet element; and drive including at least one external tooth, interacting with ratchet element. Wherein said at least one external tooth of drive has thrust surfaces to interact with thrust surfaces of teeth of gear ratchet element, when setting and adjusting dose, so that it substantially prevents rotation of drive relative to master dose controller, and in process of injection transfer movement of drive in locking interaction with master dose controller is provided, thus overcoming friction between ratchet element and drive and allowing drive to rotate together with master dose controller.

EFFECT: use of invention provides absence of tight fit components to each other, as a result, simplified assembly and ease of its adjustment.

15 cl, 19 dwg