Nursing Bed Mechanical Emergency Tilt Control for Rapid Repositioning
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Solution Overview
Problem
Current medical beds with electro-hydraulic control for tilt and height adjustments are slow to respond, posing a risk in emergency situations where rapid positioning is critical, especially when transitioning from an inclined to a sloping position, which can worsen patient conditions or lead to loss of life.
Innovation Solution
A medical bed with a mechanical emergency control system that allows for quick activation of the sloping function without electrical assistance, featuring a disengageable protrusion device and a braking system that enables rapid rotation of the connecting rod between the bed base and foot bar, allowing for immediate transition to a sloping position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electro-hydraulic control is used for tilt and height adjustments, then the bed can be adjusted with precise control, but the response time is slow which is critical in emergency situations
Solution Approach 1:
The control system is segmented into two independent parts: an electro-hydraulic system for normal precise adjustments, and a separate mechanical emergency system for rapid positioning. This segmentation allows each subsystem to optimize for its specific function without compromising the other.
Solution Approach 2:
A mechanical transmission system acts as an intermediary between the pedal and the brake mechanism, enabling rapid mechanical actuation of the brake without electrical components. This intermediary mechanical path bypasses the slow electro-hydraulic response for emergency situations.
2Extent of automation
If electro-hydraulic control is used for bed adjustments, then automated control is achieved, but the system becomes dependent on electrical power which may fail in emergencies
Solution Approach 1:
The emergency control system is self-service in that it uses pure mechanical components (pedal, transmission, brake) that do not require electrical power. The system serves itself through direct mechanical actuation, ensuring operation during power failures or electrical system malfunctions.
Solution Approach 2:
The mechanical emergency control system serves as a beforehand cushion against electrical system failures. By preparing an independent mechanical pathway in advance, the system ensures continuous operability even when the automated electro-hydraulic system becomes unavailable.
3Reliability
If the brake is engaged to hold the bed position, then patient safety is ensured, but rapid release is needed in emergencies to reposition the patient
Solution Approach 1:
The brake mechanism operates in periodic cycles: engaged for normal position holding, and rapidly disengaged when the pedal is actuated. This periodic switching between locked and free states allows the system to maintain stability during normal use while enabling rapid repositioning when needed.
Solution Approach 2:
The mechanical transmission system allows the brake to be rapidly disengaged by skipping through the normal electro-hydraulic control sequence. The direct mechanical linkage enables the brake to be released immediately upon pedal actuation, rushing through the intermediate steps that would otherwise slow the response.
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
Enables rapid and safe positioning of the bed, maximizing patient survival chances in emergency situations by allowing manual, electrical-independent operation, ensuring compatibility with patient comfort and safety settings.
Implementation Method 1
a brake having a locking position in which it blocks the rotation of the connecting rod relative to the foot bar
Implementation Method 2
a mechanical transmission connecting the control pedal to the protruding device and to the tilting device
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The bed (1) has a brake (43) comprising a locking position in which the brake blocks rotation of a rod (36) with respect to a foot bar (7), and a releasing position in which the brake allows the rotation of the rod. A movable pedal (47) is mounted between an inactive position in which the pedal maintains brake of a sloping device in a sloping position and a coupling lock (31) of the sloping device in a coupled position, and an active position in which the pedal releases the brake of the sloping device and places the lock of a proclive device (18) in a disconnected position.