Modular Sofa Sleeper Having Pivotal Backrest Assembly
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Solution Overview
Problem
Sofa sleepers are challenging to ship and assemble due to their size and construction, and existing models require heavy and awkward unfolding mechanisms, necessitating a modular design that can be shipped in boxes and easily assembled without tools.
Innovation Solution
A modular sofa sleeper with a sofa frame, backrest assembly, and bed mechanism that uses tapered posts and mounting brackets for easy assembly and disassembly, allowing components to be shipped in multiple boxes and assembled quickly with minimal tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If sofa sleeper is manufactured as traditional fixed structure, then structural stability is improved, but shipping cost and assembly difficulty increase
Solution Approach 1:
The sofa sleeper is divided into multiple modular components including a sofa frame, a backrest assembly with tapered posts, a bed mechanism with tapered posts, and mounting brackets. These segments can be separately manufactured and shipped in compact boxes, then easily assembled together using the tapered post-and-bracket connection system, resolving the contradiction between structural stability and assembly complexity.
2Strength
If sofa sleeper is designed as single large unit, then structural integrity is improved, but shipping cost increases
Solution Approach 1:
The sofa sleeper is segmented into modular components (sofa frame, backrest assembly, bed mechanism) that can be collapsed into compact configurations for shipping. The tapered mounting brackets and posts enable these separate components to be securely reassembled into a structurally intact unit at the destination, reducing shipping volume while maintaining structural integrity.
Solution Approach 2:
The bed mechanism features nested sections that can be collapsed one within another, and the backrest assembly can be positioned within the sofa frame structure. This nesting capability allows the sofa sleeper to occupy minimal shipping space while maintaining full structural integrity when assembled.
3Adaptability or versatility
If traditional foldable legs are used, then adaptability to bed position is improved, but structural strength decreases
Solution Approach 1:
The sofa sleeper employs stationary legs that remain fixed in position regardless of whether the bed mechanism is in sofa position or bed position. This dynamic design choice prioritizes structural strength and stability over position-specific adaptability, as the stationary legs provide consistent support in both configurations.
Data Source
AI summary
A modular sofa sleeper comprises a sofa frame, a pivotal backrest assembly and a bed mechanism which be assembled and disassembled without tools. Each of these components may be shipped separately in boxes. The sofa frame may be shipped as multiple components which may be assembled or disassembled without tools. The sofa frame has at least one stop which limits rotation of the pivotal backrest assembly from its lowered position to its raised position. The bed mechanism is movable between an extended position for the sofa sleeper to function as a bed and a collapsed position for the sofa sleeper to function as a sofa.