Auto-injection drug delivery device

Inventors

MARCOZ, Alain • Pereira, Alexandre • POLLARD, Mathieu

Assignees

Biocorp Production SAS

Abstract

The invention relates to an automatic injector device comprising a single-use, disposable, drug delivery assembly comprising a housing and a syringe assembly located at least partially within the housing, said syringe assembly including a plunger, a pre-filled unit-dose drug containing chamber, and needle, said plunger, drug containing chamber and needle being configured and dimensioned to function as an injection syringe; a reusable motorized transmission assembly comprising a housing, a motor and transmission assembly located within the housing, said transmission assembly being configured and dimensioned to engage the plunger of said syringe in the drug delivery assembly and expel said unit dose drug from the drug containing chamber, into the needle and out of the drug delivery assembly; said single-use disposable drug delivery assembly and said reusable motorized transmission assembly are in substantial axial alignment along a longitudinal axis defined by the syringe, plunger, pre-filled unit-dose drug containing chamber, and needle.

Core Innovation

The invention relates to an automatic injector device that uses a single-use, disposable drug delivery assembly and a reusable motorized transmission assembly that are in substantial axial alignment along a longitudinal axis defined by the syringe, plunger, pre-filled unit-dose drug containing chamber, and needle. The single-use disposable drug delivery assembly includes a housing and a syringe assembly having a plunger, a pre-filled unit-dose drug containing chamber, and a needle configured to function as an injection syringe. The reusable motorized transmission assembly includes a housing, a programmable control system, a motor, and a transmission assembly configured to engage the plunger and expel the unit dose drug from the drug containing chamber into the needle and out of the drug delivery assembly.

A coupling system is configured and dimensioned to removably couple the housing of the single-use disposable drug delivery assembly to the housing of the reusable motorized transmission assembly to provide substantial axial alignment. The injector architecture includes a needle guard coaxially movable along the longitudinal axis between a shielding position that completely covers a distal extremity of the needle and an injection-ready position. The disposable housing further comprises an activation circuit configured to electrically wake up the automatic injector device when the needle guard is moved into a third, wake-up position.

In the described implementation, the coaxially movable needle guard is controlled through a motor-driven, skin-sensor-controlled needle guard brake having multiple positions including shielding, injection-ready, wake-up, and an irreversible safety position. Activation includes a wake-up microswitch that powers a programmable control system, and the device includes a capacitive skin proximity sensor delivered via a coiled spring electrical connection. Injection completion is determined by drive-motor power consumption analysis, and an irreversible needle-guard lock prevents reuse after the final safety position.

Claims Coverage

The provided material identifies three independent claims (clm-00001, clm-00035, clm-00036). The inventive coverage centers on a modular automatic injector architecture combining a single-use disposable, pre-filled drug delivery syringe assembly with a reusable motorized transmission assembly that is removably coupled and axially aligned, together with a coaxially movable needle guard and an electrically controlled wake-up/operation sequence.

Across the independent claims, the core inventive structure is a removable, axially aligned disposable syringe/drug-delivery assembly mated to a reusable motorized transmission assembly, together with a coaxially movable needle guard that provides shielding/injection-ready states and a wake-up position that triggers electrical wake-up via activation circuitry. A further refinement defines switch activation means on the needle guard as a longitudinally aligned switch engagement ridge.

Stated Advantages

Documented Applications