Bed Guard Assembly With Dual Locking Against Spontaneous Unlocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current hospital bed guards lack complete protection against spontaneous unlocking and movement, often relying on a single safety element that can be overcome unintentionally, posing risks to patient safety and medical personnel handling.
Innovation Solution
A removable guard assembly with a dual safety locking mechanism, featuring a sleeve and blocking member actuated by an operator, which moves between locked and unlocked positions to prevent movement of the main support relative to the bed frame, incorporating a flexible member for secure locking and a lever mechanism for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single safety element locking mechanism is used, then the device complexity is reduced, but the reliability against spontaneous unlocking deteriorates
Solution Approach 1:
The locking mechanism is divided into two independent safety elements: a primary locking element that prevents guard movement, and a secondary locking element that prevents unintentional activation of the primary element. This segmentation ensures that failure of one element does not compromise overall system reliability.
Solution Approach 2:
The secondary locking element acts as a pre-prepared protective measure against the potential failure of the primary locking element. By having this backup mechanism in place beforehand, the system cushions against the harmful effect of spontaneous unlocking.
2Reliability
If the guard is permanently fixed to the bed frame, then the reliability of patient protection is improved, but the ease of operation for patient access deteriorates
Solution Approach 1:
The guard assembly transitions from a static permanently fixed state to a dynamic removable state. The guard can be easily detached from the bed frame when patient access is needed, and reattached when protection is required, providing adaptability without compromising security during use.
Solution Approach 2:
The mounting mechanism serves as an intermediary between the guard and the bed frame, allowing the guard to be easily attached and detached. This intermediary connection provides the necessary reliability during use while enabling simple operation when access is needed.
3Ease of operation
If the blocking member moves freely within the sleeve, then the ease of operation is improved, but the reliability of locked position deteriorates
Solution Approach 1:
The spring element applies a preliminary counteracting force to the blocking member, preventing it from moving unintentionally out of the locked position. This preliminary anti-action ensures that the blocking member remains securely engaged unless a deliberate force is applied to overcome the spring resistance.
Solution Approach 2:
The blocking member features a curved end surface that interfaces with the spring element, allowing smooth movement during actuation while maintaining stable engagement in the locked position. The curvature enables easy operation while the spring provides reliable positioning.
Data Source
AI summary
The bed consists of a frame, mattress platform and removable bed guard assembly. The bed guard assembly includes a main support which at the lower end has a mounting for connection to the bed, a guard permanently fixed to the main support and a locking mechanism for fixing the main support in relation to the bed. The locking mechanism is located inside the guard assembly and includes a sleeve and blocking element which moves between two positions. In one position the blocking element engages in the sleeve, and in the second position the blocking element is released from the sleeve, where in one of these positions it allows the movement of the main support in relation to the sleeve, and in the second of these positions it prevents the movement of the main support in relation to the sleeve, the movement of the blocking element of the locking mechanism is controlled by the actuator.