Hypodermic Interface Assembly Controlled Separation Mechanism
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Solution Overview
Problem
Existing hypodermic interface assemblies face challenges in performance and cost, with a need for enhanced designs that improve their functionality and prevent cannula breakage during radial forces, leading to potential loss within animal tissue.
Innovation Solution
A hypodermic interface assembly comprising a hub, cannula, and cannula carrier, where the cannula is non-removably connected to the hub through a core member, allowing controlled separation and preventing cannula breakage by designating a region for predictable failure, ensuring the cannula remains attached to the carrier for easy retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cannula is firmly connected to the hub, then the cannula remains securely attached during injection, but the cannula may break and remain lost within animal tissue when subjected to radial forces
Solution Approach 1:
The assembly is divided into distinct segments: the hub, the cannula, and the cannula carrier. The cannula is non-removably connected to the hub, while the cannula carrier is controllably separable from the hub. This segmentation allows the cannula to remain securely attached during normal operation while enabling controlled separation if breakage occurs, preventing loss of the cannula in tissue.
Solution Approach 2:
The cannula carrier acts as an intermediary component between the hub and the cannula. It provides a controlled separation mechanism that allows the cannula to be released from the hub in a controlled manner when radial forces cause potential breakage, rather than the cannula breaking unpredictably and remaining lost in tissue.
2Reliability
If the cannula is non-removably connected to the hub, then the cannula remains securely attached during operation, but the assembly complexity increases with additional components
Solution Approach 1:
The cannula and hub are non-removably connected as a single integrated unit, simplifying the overall assembly. The cannula carrier is designed to controllably separate from the hub-cannula assembly, providing the necessary safety mechanism without requiring complex additional components. This merging approach maintains reliability while minimizing assembly complexity.
3Ease of operation
If the cannula carrier is controllably separable from the hub, then the cannula can be retrieved easily after injection, but the separation control mechanism increases device complexity
Solution Approach 1:
The cannula carrier is designed with dynamic separation capability, allowing it to be controllably separated from the hub after the injection is complete. This dynamic feature enables easy retrieval of the cannula carrier while maintaining a simple overall structure, as the separation mechanism does not require complex additional components.
Data Source
AI summary
A hypodermic interface assembly is disclosed. The hypodermic interface assembly includes a hub; a cannula; a core member; and a cannula carrier. The core member is non-removably connected to the cannula. The cannula carrier is non-removably connected to the attachment member. The cannula carrier is controllably separable from the hub. A subassembly is also disclosed. The subassembly includes a hub; a cannula; and a core member. A proximal end surface of the core member is arranged at a predetermined hub-core distance away from a distal end surface of the hub.