Sliding-Groove Folding Sofa Bed for Simple One-Person Conversion
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Solution Overview
Problem
Existing folding sofa beds have complex and costly hinge mechanisms, requiring two people to operate and occupying more space, making them inconvenient and difficult to assemble.
Innovation Solution
A folding sofa bed design featuring a bed frame with a sliding groove and guiding bar mechanism, allowing the seat back and mattress to change positions easily from a bed to a sofa, supported by horizontal and connecting bars, with a lock block for stability, enabling single-person operation and reduced assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional hinge mechanism is used to connect the seat back and seat mattress, then the sofa can transform between bed and sofa positions, but the structure becomes complex and manufacturing cost increases
Solution Approach 1:
The traditional single hinge mechanism is segmented into multiple components: a first hinge connecting the seat back to the seat frame, and a second hinge connecting the seat mattress to the seat frame. This segmentation allows each hinge to perform a specific function, simplifying the overall structure while maintaining the transformation capability between bed and sofa positions.
Solution Approach 2:
The patent extracts and removes the complex intermediate linkage components from the traditional hinge mechanism. By directly connecting the seat back and seat mattress to the seat frame through separate hinges, the design eliminates unnecessary mechanical linkages, reducing structural complexity and manufacturing cost while preserving the essential transformation function.
2Adaptability or versatility
If a traditional hinge mechanism is used, then the sofa can transform positions, but at least two persons are needed to operate it simultaneously
Solution Approach 1:
The patent introduces dynamic elements including a first elastic component connected to the seat back and a second elastic component connected to the seat mattress. These elastic components provide automatic resistance and guidance during the transformation process, allowing a single person to easily control the movement of the seat back and seat mattress between positions without requiring coordination with another person.
3Adaptability or versatility
If a complex hinge mechanism is used, then the transformation function is achieved, but the assembly process becomes inconvenient
Solution Approach 1:
The hinge mechanism is segmented into independent, modular components: first hinge, second hinge, first elastic component, and second elastic component. Each component can be manufactured separately using standard fabrication processes and then assembled through simple connection operations, significantly improving ease of manufacture and assembly compared to a complex integrated mechanism.
Data Source
AI summary
A folding sofa bed comprises a bed frame, a seat mattress and a seat back. The bed frame comprises two armrest borders and a front horizontal bar and a rear horizontal bar connecting the two armrest borders. A central portion of the armrest border is disposed with a long sliding groove of backwardly disposed and downwardly inclined sliding groove, two hinges and two connecting bars. Each of the hinges comprises a front hinge plate and a rear hinge plate, the front hinge plate is connected to the seat mattress, the rear hinge plate is connected to the seat back, the front hinge plate is disposed with a guide bar, the guide bar is slidably disposed inside the sliding groove, the two ends of the connecting bar are respectively hinged to the armrest border and the seat back.