Parallelogram Spring Extension Mechanism for Variable-Size Bed Comfort
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Solution Overview
Problem
Existing variable-size bed arrangements with pocket-spring mattress cores face issues of compromised sleeping comfort due to variations in firmness when adjusting between expanded and contracted states, as the separation of springs affects mattress firmness and can cause the stretched layer to be squeezed.
Innovation Solution
An extension mechanism comprising rows of interconnected spring members and rods linked in a parallelogram configuration provides a resilient mattress core portion, allowing for easy adjustment between states without compromising comfort, using arc-shaped or ring-shaped parts and polymeric materials for lightweight and efficient construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjacent springs of the pocket-spring mattress are separated to enable extension, then the bed arrangement can be adjusted between expanded and contracted states, but the sleeping comfort is compromised due to variation in firmness and space between pocket springs
Solution Approach 1:
The extension mechanism is divided into multiple rows of interconnected spring members that can independently compress and extend. This segmentation allows each spring member to maintain consistent firmness characteristics while collectively providing the desired extension function without compromising sleeping comfort.
Solution Approach 2:
The spring members are designed with specific geometric parameters (arc-shaped or ring-shaped configurations) that enable them to change their effective length and compression characteristics during extension. This parameter change allows the mechanism to provide smooth extension while maintaining consistent firmness and avoiding the creation of gaps that would compromise comfort.
2Volume of moving object
If the bed arrangement is compressed to the contracted state, then space is saved, but the stretched layer may be squeezed compromising comfort
Solution Approach 1:
The extension mechanism employs dynamic spring members that can adapt their stiffness and compression characteristics based on the state of extension. When compressed to the contracted state, the spring members dynamically adjust to distribute forces evenly, preventing localized squeezing that would compromise comfort while achieving compact dimensions.
3Volume of moving object
If a roll-up device is used for cover layer adjustment, then the bed arrangement can be compacted, but the device complexity increases
Solution Approach 1:
The invention extracts the extension function from complex mechanical systems (like roll-up devices) and implements it through the inherent elastic properties of spring members. By taking out the need for complex actuation mechanisms and relying on the natural compression and extension capabilities of the spring members, the device complexity is significantly reduced while maintaining compactness.
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
Facilitates efficient adjustment of bed arrangements between expanded and contracted states, maintaining consistent sleeping comfort and space efficiency, applicable in various vehicles and settings without requiring a roll-up device for cover layer adjustment.
Implementation Method 1
rows of interconnected spring members and rods linked to the spring members in a parallelogram configuration to provide a resilient mattress core portion
Data Source
Figure 1~2b
Figure 3a~3c
Figure 3d~4b
AI summary
The present invention relates to an extension mechanism (60) for adjusting a bed arrangement (10) between an expanded state and a contracted state. The extension mechanism (60) comprises rows of interconnected spring members (62) and rods (64) linked (L) to the spring members (62) in a parallelogram configuration to provide a resilient mattress core portion. The present invention also relates to a variable-size bed arrangement (10) comprising a mattress core (30) and a base (20), which base (20) is adapted to support at least a portion of the mattress core (30). The bed arrangement comprises an extension mechanism (60) comprising rows of interconnected spring members (62) and rods (64) linked (L) to the spring members (62) in a parallelogram configuration to provide a resilient mattress core portion.