Convertible Sofa-Bed Linkage for Full Sleeping Surface
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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, they also fail to provide a seamless transition between folded and unfolded positions.
Innovation Solution
A furniture unit with a base, seat, intermediate, and head sections interconnected by pivotally linked mechanisms that allow for a smooth transition between a folded and unfolded position, forming a complete sleeping surface, with the mechanism controlling the movement of these sections and folding the legs under the seat when in the folded position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complete mattress is folded within the cavity of the sofa, then a complete sleeping surface is provided, but the furniture unit becomes heavy and requires an intricate mechanism
Solution Approach 1:
The patent extracts the mattress from the system entirely. Instead of storing a separate mattress within the sofa cavity, the invention uses the sofa's own seat and back sections as the sleeping surface. The mechanism only needs to reposition these existing structural components, eliminating the need to store and maneuver a separate mattress, thus reducing mechanism complexity while still providing a complete sleeping surface.
Solution Approach 2:
The sofa sections serve dual functions: during the day, they form a functional sofa for seating; at night, they unfold to create a complete sleeping surface. The seat and back sections are designed to function both as structural support elements of the sofa and as the actual sleeping surface, eliminating the need for a separate mattress and simplifying the overall system.
2Reliability
If a separate mattress is included in the sofa-bed, then a complete bed is provided, but the unit becomes cumbersome and heavy
Solution Approach 1:
The mattress is completely removed from the system. The invention relies solely on the sofa's existing structural components (seat and back sections) to form the sleeping surface, eliminating the weight of a separate mattress while still providing a complete bed functionality.
Solution Approach 2:
The seat and back sections are designed to serve multiple purposes: they provide structural support when the sofa is in its normal seating configuration and form the complete sleeping surface when unfolded. This multi-functionality eliminates the need for additional mattress weight while maintaining bed functionality.
3Volume of moving object
If the head, intermediate and seat sections are positioned in vertically stacked relationship, then space is saved, but the mechanism complexity increases
Solution Approach 1:
The bed is divided into three separable sections (head, intermediate, and seat sections) that can be independently positioned and stored. Each section can be folded and stacked separately, allowing for compact vertical storage while using a relatively simple hinge-based mechanism rather than a complex integrated system.
Solution Approach 2:
The head, intermediate, and seat sections are designed to nest within each other in a vertically stacked configuration when folded. The sections fit together like nested dolls, maximizing space efficiency in the folded state while using straightforward hinge connections that reduce mechanism complexity compared to interlocking systems.
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, multifunctional furniture unit that efficiently converts into a bed with a complete mattress-like surface, offering a convenient and space-saving solution by eliminating the need for additional beds and simplifying the folding mechanism.
Implementation Method 1
a mechanism having pivotally interconnected links, the mechanism interconnecting the base with the head, intermediate and seat sections. The mechanism controls the movement of the head, intermediate and seat sections
Data Source
AI summary
A furniture unit containing a foldable bed includes: a base including a storage cavity; a seat section; an intermediate section; a head section; and a mechanism having pivotally interconnected links, the mechanism interconnecting the base with the head, intermediate and seat sections. The mechanism controls the movement of the head, intermediate and seat sections between a folded position, in which the head, intermediate and seat sections are generally horizontally disposed and positioned in vertically stacked relationship, with the head section below the intermediate section and the seat section above the intermediate section, the head and intermediate sections being positioned in the cavity of the base, and an unfolded position, in which the head, intermediate and seat sections are horizontally disposed and serially aligned to form a sleeping surface.