Auto-Injector Syringe Coding Feature for Safe Mounting
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Solution Overview
Problem
Existing auto-injector devices lack a mechanism to prevent incorrect syringe insertion, which can lead to improper medication administration and safety issues.
Innovation Solution
A syringe design featuring a first coding feature, such as ribs, bars, or projections, that mechanically interacts with a second coding feature in the auto-injector device, ensuring only compatible syringes can be mounted, thereby preventing incorrect insertion and ensuring proper medication administration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coding mechanism is added to prevent incorrect syringe insertion, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
The coding feature uses asymmetric geometric patterns (specific arrangements of ribs, bars, projections, grooves, or indents) on the syringe flange that must match corresponding asymmetric features in the auto-injector device. This asymmetry ensures that only the correct syringe type can be properly inserted and mounted, preventing incorrect medication administration while maintaining a relatively simple mechanical structure.
Solution Approach 2:
The coding feature acts as an intermediary mechanical interface between the syringe and auto-injector device. These coding features (ribs, bars, projections, grooves, indents) serve as a mediating mechanism that enables or prevents mounting based on geometric compatibility, providing a simple yet effective safety check without requiring complex electronic or mechanical systems.
2Adaptability or versatility
If multiple syringe types with different coding features are produced, then compatibility and adaptability are improved, but manufacturing cost increases
Solution Approach 1:
The coding feature design allows a single syringe type with a specific coding pattern to be compatible with a corresponding auto-injector device through geometric matching. The system achieves universality by ensuring that the coding features (ribs, bars, projections, grooves, indents) on the syringe flange work in conjunction with the matching features in the auto-injector to enable proper mounting and function, thereby supporting multiple syringe types without requiring fundamentally different syringe designs.
Data Source
AI summary
A syringe (1) comprising a first coding feature (2, 2a, 2b) for mechanical interaction with a second coding feature (7, 7a, 7b) of an auto-injector device (6) is provided. The first coding feature (2, 2a, 2b) is designed such that the syringe (1) is only mountable in an auto-injector device (6) having a second coding feature (7, 7a, 7b) mating the first coding feature (2, 2a, 2b). Furthermore, an auto-injector device (6) having a housing (60), wherein a syringe (1) can be mounted,and a set of at least two auto-injector devices (6) and syringes (1) are provided.