Needleless Connector Cap Safety Locking Mechanism
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Solution Overview
Problem
Conventional needleless connector caps pose a choking hazard and can be inadvertently removed, leading to safety concerns, particularly in situations where they may be accidentally taken off by children, and there is no existing device that addresses the issue of preventing such removal.
Innovation Solution
The development of a safety locking connector cap with an outer housing designed to prevent removal unless a downward force is applied with counter-clockwise rotation, incorporating a safety interface with protrusions and recesses that transfer rotational movement to secure the cap on the needleless connector, and optionally featuring air passages to prevent choking hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional cap design is used, then the cap can be easily removed and applied, but it poses a choking hazard and can be inadvertently removed by children
Solution Approach 1:
The cap is divided into an outer housing and an inner housing that can rotate relative to each other. The safety interface with protrusions and recesses creates a mechanical locking system that segments the removal action into specific rotational steps, preventing accidental removal while allowing intentional removal with proper technique
Solution Approach 2:
The cap incorporates a dynamic rotational mechanism where the inner housing can rotate relative to the outer housing. The safety interface requires a specific rotational motion to disengage, transforming the static cap design into a dynamic system that responds to user input while preventing unintended removal
2Object-affected harmful factors
If a safety locking mechanism is added to prevent inadvertent removal, then safety is improved, but device complexity increases
Solution Approach 1:
The inner housing is nested within the outer housing, with the safety interface features (protrusions and recesses) integrated into the walls of these nested structures. This nesting approach allows the locking mechanism to be incorporated without requiring separate external components, thus limiting the increase in device complexity
Solution Approach 2:
The safety locking features are merged with the structural walls of the inner and outer housings. The protrusions and recesses that provide the locking function are integrated directly into the housing structures rather than being separate elements, combining the structural and locking functions into unified components
3Reliability
If the cap is designed to secure tightly on the needleless connector, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The rotational mechanism creates a periodic engagement and disengagement pattern. The cap can be securely attached with a simple rotation, and removed with a specific rotational sequence, creating distinct periodic actions for attachment and detachment that are both reliable and controllable
Data Source
AI summary
A connector caps that can reduce risk of accidentally removing the cap include a locking feature where outer housing is designed to prevent removal of the cap unless a downward force is applied to the cap with counter clockwise rotation. Structural elements making up the cap locking feature can be optimized or varied, for example to require application of more or less force, more or less downward movement, more or less rotational movement, and variations of other characteristics to facilitate intentional removal and/or to prevent unintentional removal of the cap from the needleless connector, and/or to facilitate securing of the cap on the needleless connector. Optionally, a needleless connector cap can include an outer housing providing holes or openings or vents such that air can pass through if the cap becomes lodged in air passage way.