Retractable Warning Sign With Timer Mechanism
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Solution Overview
Problem
Current warning signs, such as collapsible safety markers and caution tapes, often remain in place long after the hazard they indicate has been resolved, causing issues like trip hazards and contamination, especially in hospitals, and lead to complacency among users due to their persistent presence.
Innovation Solution
An automatic rolling sign system equipped with a mechanical or electro-mechanical timer that rolls up and retracts after a preset period, ensuring timely removal and minimizing exposure, which can be mounted strategically to avoid tripping hazards and maintain sanitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If warning signs are placed on wet floors to alert pedestrians, then safety is improved, but the signs remain in place too long after the floor is dried causing trip hazards and contamination
Solution Approach 1:
The warning sign is designed to be dynamic rather than static. The sign automatically transitions from a displayed state to a retracted state based on time elapsed or environmental conditions (such as floor dryness detection), allowing it to adapt its presence to current safety needs and eliminate trip hazards when no longer necessary
Solution Approach 2:
The warning sign system performs self-service by automatically monitoring its own relevance through timers or sensors and removing itself when the hazard is resolved. This eliminates the need for manual monitoring and ensures the sign is removed promptly when the floor is dry, preventing contamination and trip hazards
2Reliability
If warning signs are left in place for extended periods, then they continue to provide safety alerts, but they cause complacency among users and become trip hazards themselves
Solution Approach 1:
The warning sign operates on a periodic basis rather than continuously. It displays the safety alert only during the period when a hazard exists (wet floor condition), then automatically retracts when the condition resolves. This periodic presence maintains user attention and prevents complacency while eliminating the sign as a trip hazard when not needed
3Reliability
If manual monitoring of warning signs is used to ensure timely removal, then safety is maintained, but labor time and operational complexity increase
Solution Approach 1:
The warning sign system is designed to monitor and remove itself automatically using built-in timers or environmental sensors that detect when the floor is dry. This self-service capability eliminates the need for manual monitoring by staff, saving time and resources while maintaining safety standards
Solution Approach 2:
The system incorporates feedback mechanisms through sensors that detect floor conditions or timers that track the duration of the hazard. This feedback automatically triggers the sign to retract when the hazard is resolved, ensuring timely removal without requiring human intervention or monitoring time
Data Source
AI summary
A retractable warning sign having a timer, comprising: an elongated housing having a longitudinal slot, a distal end, and a proximal end; a retractable strap wound around a spool assembly and housed inside said elongated housing that extends and retracts through said longitudinal slot; a timer connected to said spool assembly to set a retraction time for said retractable strap; a hinge assembly coupled to said proximal end of said elongated housing to provide a translational movement for said elongated housing, and an attachment mechanism to attach said elongated housing on a wall or a ceiling or a window.