Furniture, convertible from a sofa to a bed
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Solution Overview
Problem
Existing sofa beds are not optimal for both comfortable sitting and sleeping positions, as the inclined surface of the seat cushion arrangement in a sofa configuration can cause users to roll towards the backrest, and the conversion to a bed position often results in an uncomfortable orientation.
Innovation Solution
A furniture design with a frame structure and seat cushion arrangement that allows for a seat cushion to be inclined for sitting and parallel to the horizontal plane for lying, featuring a wedge-shaped cushion that adjusts orientation to provide comfortable sitting and lying positions, with a platform inclined rearwardly downwards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an extendable support construction is used for sofa bed conversion, then bed functionality is achieved, but device complexity increases and conversion requires removing the seat cushion arrangement
Solution Approach 1:
The platform is designed with universal functionality to support both the inclined sofa configuration and the parallel bed configuration directly, without requiring additional extendable support constructions. This reduces device complexity while maintaining sofa bed conversion capability
Solution Approach 2:
The invention extracts the complex extendable support construction from the design and replaces it with a simplified platform that directly supports the repositionable seat cushion arrangement. This extraction eliminates unnecessary mechanical complexity while achieving the desired conversion functionality
Data Source
AI summary
A furniture may include a frame structure and a seat cushion arrangement. The frame structure may include an elongated platform. The seat cushion arrangement may be supported by the platform in a first operative state in which at least a substantial portion of an elongated upper surface of the seat cushion arrangement is inclined in relation to a horizontal plane (HP) for establishing an elongated sitting area for a plurality of users. The seat cushion arrangement may be supported by the platform in a second operative state in which a substantial portion of an upper surface of the seat cushion arrangement is in parallel with the horizontal plane for establishing an elongated lying area for at least one user, wherein the lying area has a direction between a head end and a foot end in parallel with a longitudinal direction of the platform.