Seating unit convertible to bed
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Solution Overview
Problem
Existing convertible furniture units that serve as beds often require intricate mechanisms for unfolding and folding, and may not provide a complete mattress, leading to a need for additional support surfaces or separate mattresses, which can be heavy and cumbersome.
Innovation Solution
A seating unit with a foldable bed design that includes a seat section, intermediate section, and head section, controlled by a pair of bed folding mechanisms and leg folding mechanisms, allowing for easy conversion between a folded and unfolded position, with a seat frame comprising open square subframes and sinuous springs for comfort, and a backrest cushion assembly for support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complete mattress is folded within the cavity of the sofa, then a complete sleeping surface is provided, but the unit becomes quite heavy and requires an intricate mechanism
Solution Approach 1:
The bed is divided into three separate sections (seat section, intermediate section, head section) that can be folded independently. Each section has its own folding mechanism, allowing the bed to be collapsed into a compact stacked configuration within the sofa cavity while maintaining structural simplicity.
Solution Approach 2:
The three bed sections are nested within each other when folded, with the head section positioned below the intermediate section and the seat section above it. This nested arrangement allows the complete bed to be stored within the sofa cavity in a space-efficient manner without requiring complex mechanisms.
2Adaptability or versatility
If a complete mattress is folded within the cavity of the sofa, then a complete sleeping surface is provided, but the unit becomes quite heavy
Solution Approach 1:
The bed is divided into three separate sections (seat section, intermediate section, head section) that can be folded independently. Each section has its own folding mechanism, allowing the bed to be collapsed into a compact stacked configuration within the sofa cavity while maintaining structural simplicity.
Solution Approach 2:
The folding mechanisms allow the bed sections to move dynamically between extended and retracted positions. This dynamic capability enables the bed to provide a complete sleeping surface when needed while allowing easy collapse to a minimal footprint, reducing the need for heavy structural support throughout.
3Weight of moving object
If separate sections are used to form a mattress-like surface, then weight is reduced, but additional support surfaces or separate mattresses are needed
Solution Approach 1:
The seat section, intermediate section, and head section are merged to form a complete sleeping surface when extended. The seat section serves dual purposes as both the sofa seat and part of the bed, eliminating the need for separate mattresses or support surfaces.
Solution Approach 2:
The seat section functions universally as both the seating element of the sofa and a support surface for the bed. The intermediate and head sections provide additional support when folded out, creating a complete sleeping surface without requiring separate mattresses, thus reducing overall weight while maintaining versatility.
Data Source
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AI summary
A seating unit having a foldable bed includes: a base with an internal cavity and a rear wall; a foldable bed that includes separate and distinct head, intermediate and seat sections, wherein in a folded position, the intermediate and seat sections are generally horizontally disposed and positioned in vertically stacked relationship, and the head section is generally vertically disposed and positioned adjacent the rear wall of the base, and in an unfolded position, the head, intermediate and seat sections are generally horizontally disposed and in serial alignment with each other; and a bed folding mechanism that is attached to the base and the head, intermediate and seat sections that controls the movement of the bed between the folded and unfolded positions.