Sleeper Sofa Support Frame With Arcuate Guide Slot Motion
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Solution Overview
Problem
Conventional sofa-beds are uncomfortable to sleep in due to insufficient rigidity, complex and unstable bed frames, and are difficult to transition between retracted and extended positions, making them cumbersome to use and clean.
Innovation Solution
A sleeper sofa with a translatable support frame featuring two pivoting sections that pivot about a single axis, allowing for easy transition between retracted and extended positions through a simple gliding motion, facilitated by wheels and a locking mechanism, reducing complexity and instability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the bed frame is folded into the sofa base portion using numerous pivoting parts and accordion-style folding, then the sofa-bed can be compact for storage, but the bed frame becomes complex and unstable
Solution Approach 1:
The bed frame is divided into three separate support portions that can be independently folded and stored. Each support portion can be folded upon each other in an accordion fashion, allowing compact storage while maintaining structural integrity and reducing overall complexity compared to a single rigid frame
Solution Approach 2:
The three support portions are designed to nest within each other when folded, similar to nested dolls. The support portions can be tucked into the base portion of the sofa, with each portion fitting within the space created by the others, achieving compact storage without requiring excessive space or complex mechanisms
2Volume of moving object
If the bed frame is folded into the sofa base portion using accordion-style folding, then the sofa-bed can be compact for storage, but the bed frame becomes unstable
Solution Approach 1:
The bed frame employs dynamic folding mechanisms that allow the support portions to be folded and unfolded smoothly. The pivoting parts enable controlled movement between stored and deployed configurations, providing stability when extended for use while allowing compact folding for storage without compromising structural integrity
3Adaptability or versatility
If numerous pivoting parts and accordion-style folding are used, then the bed can be folded into the sofa, but the sofa-bed becomes heavy and difficult to operate
Solution Approach 1:
The bed frame is segmented into three separate support portions that can be independently manipulated. This segmentation allows users to fold and unfold the bed in a systematic manner, reducing the physical effort required compared to moving a single large rigid structure, while maintaining the ability to transform between sofa and bed configurations
4Volume of moving object
If the bed frame has three separate support portions folded in accordion fashion, then the bed can be tucked into the sofa base, but cleaning becomes tedious and time-consuming
Solution Approach 1:
The dynamic folding mechanism allows the bed frame to be quickly unfolded for cleaning access and easily folded back for storage. The pivoting parts enable smooth transitions between configurations, allowing cleaning crews to efficiently access the bed portion for cleaning without the tedious process of manually disassembling complex fixed structures, significantly reducing the time required for maintenance
Data Source
AI summary
There is provided a sleeper sofa including a sofa frame, a main support frame, and a bed frame engageable with the sofa frame and main support frame. The sofa frame includes first and second arm portions, and a backrest portion extending therebetween. The main support frame is connected to at least one of the first and second arm portions to fixedly connect the main support frame to the sofa frame. The bed frame includes a first section and a second section pivotally connected to the first section via a hinge. The sleeper sofa further includes a guide plate defining an arcuate guide slot, which communicates with a guide post connected to the second section of the bed frame. The guide post travels in the guide slot to lower and raise the second section of the bed frame as the bed frame moves between the retracted and extended positions.