Foldable sofa-bed
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing convertible furniture units that function as beds often require intricate mechanisms and separate mattresses, making them heavy and cumbersome, while lacking a complete mattress, separate sections that form a flat sleeping surface are not as versatile or convenient.
Innovation Solution
A seating unit with a foldable bed comprising distinct head, intermediate, and seat sections, and a bed folding mechanism that allows the sections to pivot and align horizontally for a compact, versatile sleeping surface, eliminating the need for additional mechanisms and mattresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complete mattress is folded within the sofa cavity, then the sleeping comfort is improved, but the weight and device complexity increase
Solution Approach 1:
The patent extracts the mattress function from a separate component and integrates it into the sofa structure itself. The seat cushion and backrest cushion serve dual purposes as both seating elements and mattress components, eliminating the need for a separate mattress and reducing overall device complexity.
Solution Approach 2:
The cushions are designed to perform multiple functions: they serve as seating surfaces during the day and as mattress components when the sofa is converted to a bed. This multi-functionality reduces the total number of components needed while maintaining sleeping comfort.
2Reliability
If a complete mattress is folded within the sofa cavity, then the sleeping comfort is improved, but the weight of the furniture increases
Solution Approach 1:
The cushions serve dual purposes as both seating elements and mattress components, eliminating the need for a separate mattress. This reduces the total weight of the furniture while maintaining sleeping comfort.
3Device complexity
If separate sections are used to form a flat sleeping surface without a complete mattress, then the device complexity is reduced, but the sleeping comfort and versatility decrease
Solution Approach 1:
The bed is divided into separate sections (seat cushion, backrest cushion, and intermediate section) that can be independently positioned and folded. This segmentation allows for a simpler mechanism while still forming a complete, comfortable sleeping surface when assembled.
Solution Approach 2:
The cushions are designed to perform multiple functions: they serve as seating surfaces during the day and as mattress components when the sofa is converted to a bed. This multi-functionality reduces the total number of components needed while maintaining sleeping comfort.
4Device complexity
If multiple separate sections are used to form the bed, then the device complexity is reduced, but the compactness when folded increases
Solution Approach 1:
The bed is divided into separate sections that can be independently folded and stacked. This segmentation allows the sections to be compactly arranged within the sofa cavity when not in use, reducing the overall volume occupied.
Solution Approach 2:
The intermediate section is positioned within the cavity of the base, and the head section is stored within the cavity formed by the intermediate section. This nested arrangement minimizes the volume occupied when the bed is folded.
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
The solution provides a lightweight, compact, and multifunctional seating unit that can easily convert into a bed, suitable for space-constrained environments, offering a comfortable sleeping surface without the need for additional mattresses or complex mechanisms.
Implementation Method 1
a bed folding mechanism attached to the base and the head, intermediate and seat sections and controls the movement of the bed between the folded and unfolded positions
Implementation Method 2
The head section pivots about a single pivot axis in moving between the folded and unfolded positions, and the intermediate section pivots about a single pivot axis in moving between the folded and unfolded positions
Data Source
AI summary
A seating unit that includes a foldable bed includes: a base with an internal cavity; a foldable bed that includes separate and distinct head, intermediate and seat sections; and a bed folding mechanism. 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 a rear portion of the base, with an outer surface of a cushion of the head section forming the rear surface of the seating unit, and in an unfolded position, the head, intermediate and seat sections are generally horizontally disposed and in serial alignment with each other. The bed folding mechanism is attached to the base and the head, intermediate and seat sections and controls the movement of the bed between the folded and unfolded positions.