Folding sofa bed

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Solution Overview

Problem

Existing sofa beds require manual removal of the sofa cushion when unfolded, which is cumbersome and occupies additional space.

Innovation Solution

A folding sofa bed design featuring a turning component that allows the cushion body to be automatically turned below the folding bed frame when unfolded, saving space and enhancing operational convenience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the cushion body remains above the folding bed frame when unfolded, then the structure is simple, but the space utilization is poor and operation is cumbersome

Engineering Contradiction:

Improvespace utilizationVSAvoidoperation convenience

Core Design Contradiction:

Volume of moving objectVSEase of operation

Solution Approach 1:

The cushion body is inverted from its conventional position above the bed frame to below the bed frame when the sofa bed is unfolded. This inversion is achieved through the turning component that rotates the cushion body 180 degrees, allowing it to occupy the space beneath the frame instead of above it, thereby improving space utilization and eliminating the need for manual removal

Inventive Principle:

Principle #13The other way round (Inversion)

2Device complexity

If manual removal of the cushion body is required, then the structure is simple, but the operational complexity increases

Engineering Contradiction:

Improvestructure simplicityVSAvoidautomation level

Core Design Contradiction:

Device complexityVSExtent of automation

Solution Approach 1:

The cushion body performs self-service by automatically turning and positioning itself below the bed frame through the turning component when the sofa bed is unfolded. This eliminates the need for manual intervention in cushion removal while maintaining relatively simple structural complexity through the use of a straightforward turning mechanism

Inventive Principle:

Principle #25Self-service

3Ease of manufacture

If the cushion body is positioned above the bed frame, then the structure is straightforward, but the space occupation increases

Engineering Contradiction:

Improvestructural straightforwardnessVSAvoidspace occupation

Core Design Contradiction:

Ease of manufactureVSArea of stationary object

Solution Approach 1:

The cushion body's position is changed from the vertical dimension (above the frame) to utilize the horizontal space below the frame. The turning component enables this dimensional transition by rotating the cushion body into the previously unused space beneath the bed frame, reducing overall space occupation while maintaining manufacturing straightforwardness

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12426716B2Folding sofa bed

Publication Date: 2025.09.30 JIAXING REST FURNITURE & APPLIANCE CO LTD

AI summary

Disclosed is a folding sofa bed, including a folding bed frame body, a cushion body, and a turning component. The cushion body is disposed above the folding bed frame body. The turning component is connected with the folding bed frame body and the cushion body. The turning component is capable of driving the cushion body above the folding bed frame body to turn to be below the folding bed frame body. In this application, when the folding sofa bed is unfolded, the cushion body may turn to be below the folding bed frame body through the turning component. This may not only save space, but also bring convenience to a user for operation.