Drug Delivery Device Time Indicator Mechanism

The patent extracts the time tracking function from a complex electronic system and implements it through a simple mechanical timer mechanism. The timer consists of a movable indicator that rotates to indicate elapsed time, driven by a spring mechanism that activates when the dose is expelled. This extraction of the essential function (time tracking) while removing unnecessary electronic complexity directly resolves the contradiction between information accuracy and device complexity.

The patent employs a simple, inexpensive mechanical timer that is integrated into the disposable pre-filled device. The timer uses basic mechanical components (spring, indicator, gear) that are cost-effective to manufacture and discard with the device after use. This approach allows the time tracking feature to be provided without the high cost of electronic components, resolving the contradiction between functionality and manufacturing cost.

The patent replaces the electronic timer and display system with a purely mechanical time indication mechanism. The mechanical timer uses a spring-driven rotation system that moves an indicator around a clock face to show elapsed time. This mechanical substitution eliminates the need for electronic components, batteries, and complex circuitry, thereby maintaining reliability while significantly reducing manufacturing cost.

The patent implements a simple mechanical timer that is inexpensive to manufacture and is discarded with the pre-filled device after use. The timer uses basic mechanical parts that are cost-effective to produce at scale, making the device economically viable for disposable use. This approach provides reliable time tracking without the high manufacturing costs associated with electronic systems.

The patent merges the time tracking function directly into the pre-filled device structure. The mechanical timer is integrated into the device body, eliminating the need for separate add-on components. The timer is activated automatically when the dose is expelled through a simple mechanical linkage, providing continuous time indication without requiring any additional attachment or configuration steps by the user.

The patent implements a self-activating mechanical timer that automatically starts counting when the dose is expelled. The spring mechanism is triggered by the dosing action itself, eliminating the need for manual activation or configuration. The timer continuously displays the elapsed time without requiring user intervention, thereby providing the time tracking function while maintaining ease of operation.

The patent extracts the time tracking function from electronic components and implements it through a simple mechanical timer. The mechanical timer uses basic components (spring, gear, indicator) that can be easily disposed of with the pre-filled device without creating electronic waste. This extraction of the time tracking function while removing electronic components directly addresses the environmental impact issue while maintaining measurement precision.

The patent employs a simple mechanical timer that is designed to be discarded with the pre-filled device after use, eliminating the need for separate electronic waste disposal. The mechanical components are inexpensive and environmentally benign compared to electronic components. This approach provides precise time tracking while minimizing environmental harm by avoiding the disposal of electronic parts.