Set Connector Lock Mechanism for Fluid Infusion Device
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Solution Overview
Problem
Existing fluid infusion devices for ambulatory or portable use face challenges with the set connector assembly inadvertently moving during user movement, leading to potential disconnection and disruption of fluid flow.
Innovation Solution
A set connector assembly with a lock mechanism, featuring a graspable portion and a coupling portion, where the graspable portion has locking tabs that engage with a lock on the fluid infusion device, allowing the connector to move between locked and unlocked positions, ensuring secure attachment and preventing accidental disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the set connector assembly is made removable for ease of operation, then the ease of operation is improved, but the reliability deteriorates due to potential inadvertent movement or disconnection during user movement
Solution Approach 1:
The connector incorporates a dynamic locking mechanism that transitions between locked and unlocked states. The locking tabs on the graspable portion engage with corresponding features on the coupling portion to secure the connector during use, yet can be easily disengaged when needed. This dynamic system allows the connector to be removable for ease of operation while maintaining reliability during ambulatory use through the engaged locked state.
Solution Approach 2:
The locking function is extracted as a distinct mechanism separate from the basic coupling structure. The locking tabs and corresponding engagement features are implemented as separate elements that can independently secure the connector without interfering with the ease of attachment and detachment operations. This extraction allows the locking function to enhance reliability without compromising the ease of operation.
2Reliability
If a locking mechanism is added to prevent inadvertent movement, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is designed to be self-actuating through the natural insertion motion of the connector. As the coupling portion is inserted into the receiving structure, the locking tabs automatically engage with the corresponding features, securing the connector without requiring additional user actions or complex actuating mechanisms. This self-service approach maintains reliability while minimizing device complexity.
Solution Approach 2:
The locking function is merged with the basic coupling operation. The same insertion motion that connects the connector also activates the locking mechanism, eliminating the need for separate locking steps or additional controls. This merging reduces device complexity by using existing structural elements (locking tabs, coupling portion, receiving structure) to provide both connection and securing functions simultaneously.
Data Source
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AI summary
A set connector assembly for a fluid infusion device is provided. The set connector assembly includes a connector having a body. The body defines a graspable portion and a coupling portion, and the coupling portion is to be received within a portion of the fluid infusion device. The graspable portion has at least one locking tab to lock the connector to the fluid infusion device, and the graspable portion is movable relative to the body to move the connector between a first, locked position and a second, unlocked position relative to the fluid infusion device.