Dual Connecting Rod Bed Base for Wall Collision Avoidance
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Solution Overview
Problem
Existing medical beds with protruding functions face complexity in height adjustment systems, leading to inadequate adaptability to diverse patient needs and potential collisions with nearby walls due to excessive bed base displacement during inclination.
Innovation Solution
A bed base with a protruding device featuring a dual connecting rod system, where the first connecting rod slides along an upright and the second connecting rod is pivotally mounted, allowing for controlled inclination and reduced displacement towards the footboard, thereby minimizing interference with surrounding structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single connecting rod system is used to tilt the bed base, then the protruding function can be achieved, but the bed base displaces excessively towards the head, causing collision with nearby walls
Solution Approach 1:
The single connecting rod system is divided into two separate connecting rods (first connecting rod and second connecting rod) that work in conjunction with two pistons. This segmentation allows independent control of the bed base's tilting and displacement, enabling the protruding function while minimizing unwanted movement towards the head that would cause wall collision.
Solution Approach 2:
A crosspiece is introduced as an intermediary component connecting the two connecting rods. This crosspiece coordinates the movement between the rods, ensuring that when the bed base tilts to achieve the protruding function, the displacement towards the head is minimized, preventing collision with nearby walls.
2Ease of operation
If the bed base is tilted to achieve protruding function, then patient comfort and medical functionality are improved, but the displacement of bed base interferes with equipment and electrical components under the bed
Solution Approach 1:
The tilting mechanism is segmented into two independent rod-piston systems that can be controlled separately. This allows the bed base to tilt for patient comfort while the displacement is minimized, preventing interference with equipment and electrical components located underneath the bed.
3Adaptability or versatility
If complex height adjustment systems with multiple pistons and levers are used to achieve protruding function, then adaptability is improved, but device complexity increases
Solution Approach 1:
The height adjustment system is designed to perform multiple functions: it controls both the height of the bed base and the tilting motion for the protruding function. By making the system multi-functional, the need for separate complex mechanisms is reduced, simplifying the overall device while maintaining adaptability.
Solution Approach 2:
The system uses dynamic connecting rods that can change their effective length and orientation during operation. The first and second connecting rods work in conjunction with pistons to dynamically adjust the bed base position, achieving the protruding function with a more compact and less complex mechanism than rigid lever systems.
Data Source
Figure 1~2
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AI summary
The bed (1) has a spring-mattress (3) adjustable with respect to a frame (2). An inclining device (25) of the mattress has a connecting rod assembly (26) comprising a connecting rod (30) mounted between the frame and the mattress. The rod has a rotating point sliding on the mattress in a longitudinal direction, and another rotating point (32) fixed relative to the frame. The assembly has another connecting rod (40) mounted between the mattress and the former rod. The latter rod has a rotating point (41) fixed relative to the mattress, and another rotating point (42) fixed on the former rod.