SAFETY DEVICE FOR PRE-FILLED SYRINGE AND INJECTION DEVICE Russian patent published in 2024 - IPC A61M5/32 

FIELD: medical equipment.

SUBSTANCE: invention relates to safety devices for a pre-filled syringe. Device comprises device housing, protective casing, tripping ring, resilient element and holder. Inner wall of the housing of the device has a latching section and a support section. Protective casing is located with possibility of movement in device housing, wherein the protective casing is provided with a hook configured to be coupled with a latching section for fixation, and a fixing support, made with possibility to hold protective casing from output from device housing. In the state in which the needle point of the pre-filled syringe is covered with a protective casing, the hook is disconnected from the latching section, and the fixing support is in contact with the support portion. At that, the tripping ring is made with possibility of movement in the device housing, wherein the end of the tripping ring facing the protective casing is configured to disconnect the hook from the latching section by squeezing the hook, and the other end of the tripping ring, remote from the protective casing, forms a fixing surface configured to contact the flange of the syringe of the pre-filled syringe for fixation. End of the resilient element rests on the tripping ring, and the other end of the resilient element rests on the protective casing. Holder is connected to device housing, wherein the holder comprises an internal holder hook configured to retain the syringe flange from moving away from the tripping ring. Internal hook of the holder is located at the end of the holder remote from the protective casing. Holder additionally contains an external hook of the holder, which is located on the other end of the holder, closer to the protective casing. Body of the device has a cutout section, wherein the outer hook of the holder is made with possibility of being inserted into the cutout section for connection.

EFFECT: safety device does not interfere with the injection of the pre-filled syringe and prevents the protective casing from jumping out prematurely.

9 cl, 12 dwg