Hospital Bed Caster Brake Control System
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Solution Overview
Problem
Healthcare facility beds often pose a risk of patient injury due to forgotten brakes, which can cause the bed to move unexpectedly, especially with older or disoriented patients, leading to falls and severe consequences.
Innovation Solution
A brake control assembly that automatically engages the caster brake after a predetermined period of inactivity, using a sensor to detect the disengaged status of the brake and a controller to apply power to the brake mechanism, ensuring the bed remains secure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bed is equipped with wheels that can turn around horizontal and vertical axes for easy movement, then the ease of operation is improved, but the reliability deteriorates because the bed may move unexpectedly when brakes are forgotten
Solution Approach 1:
The brake control system automatically applies the brakes after a predetermined period of inactivity detected by the sensor, performing the safety action before a potential fall can occur. This preliminary automatic braking action eliminates the need for manual brake application and ensures bed stability is restored even if the caregiver forgets to apply brakes manually.
2Device complexity
If manual brake control is used requiring caregiver attention, then the device complexity is reduced, but the reliability deteriorates due to human error and forgotten brakes
Solution Approach 1:
The brake control system is self-regulating, using the sensor to detect bed movement and automatically controlling the brake engagement without requiring continuous human intervention. The system monitors its own state and takes corrective action automatically, eliminating reliance on human memory and attention while maintaining relatively simple mechanical brake components.
3Reliability
If automatic brake engagement is implemented using sensor and controller, then the reliability is improved by preventing forgotten brakes, but the device complexity increases
Solution Approach 1:
The patent replaces manual mechanical brake control with an automated system using a sensor (optical, magnetic, or capacitive) and electronic controller to detect bed movement and trigger brake engagement. This substitution of mechanical human operation with sensor-based detection and electronic control achieves higher reliability while the added complexity is confined to the control system rather than the mechanical brake structure itself.
Data Source
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AI summary
An assembly controls brakes on beds for use in healthcare facilities. The bed comprises at least one caster device supporting a base frame in relation to a supporting surface. The caster device has a caster brake. A brake control assembly is operatively engageable with the caster brake to engage the caster brake. The brake control assembly comprises a sensor for sensing a status condition of the caster brake. A controller is connected to the sensor. The controller causes engagement of the caster brake when the sensor senses the status condition for a predetermined period of time.