Spring-Loaded Cable Retraction for Tangle-Free Vital Signs Monitors
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Solution Overview
Problem
Vital sign monitor cables and tubes often become tangled and unsecured, leading to damage and increased burden on clinical staff who must untangle them, as existing storage solutions do not effectively manage these cables and tubes.
Innovation Solution
A retraction system featuring multiple spool assemblies with rotational bias by spring force, a ratcheting stop to prevent unwinding, and a lever to allow controlled rewinding onto spools, housed in an enclosure with apertures for cable or tube extension, preventing tangles and securing sensors off the floor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cables and tubes are draped over the monitor or placed in a basket, then they are easily accessible, but they become tangled and unsecured leading to damage
Solution Approach 1:
The system uses a dynamic spool mechanism that allows cables to be extended and retracted as needed, rather than being statically draped or stored. The spring-loaded spool automatically winds cables back when not in use, maintaining organization and preventing damage while keeping cables accessible during procedures.
Solution Approach 2:
The spring-loaded spool mechanism provides self-service functionality by automatically winding cables back onto the spool when the release lever is engaged, eliminating the need for manual winding by clinical staff and ensuring cables are consistently secured without human intervention.
2Ease of operation
If cables are left un-stored, then they remain accessible, but they become tangled and damaged
Solution Approach 1:
The spool mechanism dynamically transitions between extended and retracted states, allowing cables to be available when needed while automatically returning to an organized, protected state when not in use, preventing tangling and damage throughout the operational cycle.
Solution Approach 2:
The spool acts as an intermediary device between the monitor and the cables, providing a controlled interface that manages cable deployment and retraction, preventing direct contact with surfaces that could cause tangling or damage.
3Object-affected harmful factors
If sensors are placed in a basket below the monitor, then they are protected from damage, but they may still become unsecured and require staff intervention
Solution Approach 1:
The spring-loaded spool mechanism automatically secures sensors and cables through self-winding action, eliminating the need for staff to manually secure or re-secure items in a basket, providing continuous passive security maintenance.
Solution Approach 2:
The system extracts sensors and cables from the vulnerable basket environment and integrates them into the active spool mechanism, where they are continuously secured through the mechanical action of the spool rather than relying on passive containment.
4Stability of the object's composition
If clinical staff manually untangle cords, then cables are reorganized, but staff time is consumed under time constraints
Solution Approach 1:
The spring-loaded spool performs cable organization automatically through its self-winding mechanism, eliminating the need for clinical staff to manually untangle and reorganize cables, saving valuable time during patient monitoring procedures.
Solution Approach 2:
The dynamic spool mechanism continuously maintains cable organization through automatic winding and unwinding actions, providing ongoing organizational stability without requiring periodic manual intervention from staff.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system organizes cables and tubes, prevents tangles, and protects sensors by allowing easy extension and retraction, reducing damage and staff workload through secure storage and easy access.
Implementation Method 1
a spool rotationally biased by a spring force, the at least one cable or tube mounted on the spool in a variably wound condition such that, as the cable or tubing is extended, the spool is rotated in a first rotational direction against the spring force
Implementation Method 2
A lever attached to the enclosure selectively releases the ratcheting stop to allow the spool to rotate in the second rotational direction by the spring force thereby selectively permitting retraction of the cable or tubing by rewinding at least a portion thereof onto the spool
Data Source
AI summary
A cable retraction system, useful at least in vital signs monitoring systems, rolls sensors cables and tubes on rotary spring spools, inside a protective enclosure, for storage. The cables and tubes along with the sensors can easily be pulled out for use and then retracted back into the enclosure as required. This eliminates tangled cables and tubes and provides protection for the sensors by not being on dangling long cables when not in use.