Portable Auto-Injector with Segmented Dry-Liquid Storage

The device divides the medication storage into separate compartments: a first chamber for liquid medication and a second chamber for dry powder medication. This segmentation allows each component to be stored in its optimal state (liquid for quick administration, dry for long shelf-life) while maintaining the capability for rapid mixing and administration when needed.

The second chamber containing dry powder medication is positioned within or adjacent to the first chamber in a nested arrangement. The mixing assembly and delivery mechanism are integrated into the chamber structure, allowing compact packaging that reduces overall device size and weight while maintaining reliable mixing and delivery functionality.

The device merges multiple functions into integrated components: the chamber walls serve as both storage barriers and mixing surfaces, the plunger mechanism simultaneously pushes liquid and activates dry powder mixing, and the delivery system handles both liquid and reconstituted medication. This functional integration reduces the number of separate parts needed despite the multi-chamber design.

The mixing mechanism is designed to be self-activating through the existing plunger operation. When the plunger pushes the liquid medication from the first chamber, it automatically enters the second chamber and mixes with the dry powder through the chamber geometry and flow dynamics, eliminating the need for separate mixing actuators or complex mechanical mixing devices.