Reusable Injector Device With Dampers And Completion Indicator
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Solution Overview
Problem
Current injector devices for medicaments lack versatility in handling different medicament formulations and do not provide reliable indicators for completion of dispensation, leading to potential user errors and syringe damage during injection.
Innovation Solution
The injector device features a dual-housing assembly with a locking mechanism and dampers to handle syringes of varying formulations, and a sudden completion indicator for precise dispensation feedback, ensuring safe and consistent injection across different medicament viscosities without requiring device adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the injector device uses a fixed mechanical structure for injection, then the device is simple to manufacture, but it cannot accommodate different medicament formulations with varying viscosities
Solution Approach 1:
The injector device is designed with a universal mechanical structure that can accommodate syringes containing different medicament formulations with varying viscosities. The housing assembly and plunger mechanism are configured to work with multiple syringe types without requiring device modifications, enabling the same device to handle both low-viscosity and high-viscosity medicaments effectively.
2Reliability
If the injector device lacks a completion indicator, then the device structure remains simple, but users cannot reliably determine when dispensation is complete, leading to potential errors
Solution Approach 1:
The injector device incorporates a sudden completion indicator that provides visual feedback to the user when dispensation is complete. This indicator mechanism gives immediate visual confirmation of dispensation completion, eliminating uncertainty and preventing user errors without significantly complicating the overall device structure.
3Productivity
If the syringe carrier moves quickly during injection, then the injection process is faster, but the ampoule may break due to sudden movements
Solution Approach 1:
The injector device incorporates a damper mechanism that provides cushioning during the syringe carrier's movement. The damper is positioned to engage with the syringe carrier and absorb shocks or sudden movements, preventing ampoule breakage while maintaining efficient injection speed. This cushioning mechanism is pre-configured to protect the syringe throughout the injection process.
4Reliability
If the outer housing remains in the extended position, then the trigger cannot be actuated, preventing accidental injection, but the device cannot be operated
Solution Approach 1:
The injector device uses a dynamic housing configuration where the outer housing can move between extended and retracted positions. The interlock assembly allows the outer housing to be rotated from the extended (safe) position to the retracted (operable) position, enabling controlled access to the trigger. This dynamic positioning ensures that the trigger is only accessible when intentionally positioned, preventing accidental activation while allowing proper operation when needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable and consistent injection of different medicament formulations with reduced syringe damage and provides clear completion indicators, enhancing user safety and device reliability.
Implementation Method 1
The injection assembly includes a ram driven by a constant force spring. Releasing the constant force spring drives the syringe carrier from the rearward position to the forward position
Implementation Method 2
The first and second dampers cooperate to inhibit breaking of the ampoule during movement of the syringe carrier and movement of the plunger
Data Source
Figure 1~2
Figure 3
Figure 4~6
AI summary
An injector device includes an injector body that receives a syringe; and an injection assembly being configured to dispense medicament from the syringe in a dispensation step. Certain types of injector devices include a sudden completion indicator that indicates when the injection is completed. Certain types of injector devices are configured to dispense two different medicament formulations having different viscosities from syringes without making any changes to the injector devices other than to switch out the syringes. Certain types of injector devices include safety arrangements that inhibit firing of the injector device until front and rear housing assemblies are disposed in predetermined rotational and axial positions relative to each other.