Sofa Bed Leg Frame Layout for Wall-Close Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional multifunctional furniture, such as sofa beds, face challenges in providing adequate support when transitioning between sitting and bedding modes due to tension between supporting frame size and strength, affecting aesthetic appearance and structural integrity, and often feature complex mechanical structures or separate bed frames and cushions.
Innovation Solution
A multifunctional furniture design with a stationary seat frame, a back frame pivotally connected to the seat frame, and a leg frame arrangement that provides extensive support without requiring a sliding seat frame, minimizing the size of the supporting frame while maintaining strength, and incorporating a foldable leg frame for additional support in bedding mode, ensuring the cushion and frame form an integral body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the supporting frame is made large to provide adequate support to the back frame in bedding mode, then the supporting strength is improved, but the aesthetic appearance deteriorates and the furniture cannot be positioned next to a wall surface
Solution Approach 1:
The supporting frame is divided into a first supporting leg and a second supporting leg that are spatially separated. The first supporting leg extends downward from the front end of the supporting frame, while the second supporting leg extends downward from the rear end. This segmentation allows the supporting frame to be smaller in overall size while maintaining adequate support through strategically positioned legs, resolving the contradiction between supporting strength and aesthetic appearance.
2Strength
If the supporting frame is made large to provide adequate support to the back frame in bedding mode, then the supporting strength is improved, but the furniture cannot be positioned next to a wall surface as the supporting frame must be rearwardly extended
Solution Approach 1:
The supporting frame is segmented into two separate supporting legs positioned at different locations. This allows the supporting frame structure to be compact and not excessively rearwardly extended, enabling the furniture to be positioned next to wall surfaces while still providing adequate support strength through the distributed leg configuration.
3Shape
If the supporting frame is made small to improve aesthetic appearance, then the aesthetic appearance is improved, but the supporting strength deteriorates and the furniture may break down easily
Solution Approach 1:
Instead of uniformly increasing the size of the entire supporting frame, the invention applies local quality by strategically positioning the first supporting leg at the front end and the second supporting leg at the rear end. This localized support approach provides adequate supporting strength at critical points while keeping the overall frame size small for aesthetic purposes.
4Adaptability or versatility
If a sliding seat frame is used to enable bed mode, then the bedding mode functionality is achieved, but the frame structure becomes complicated and manufacturing cost increases
Solution Approach 1:
The invention extracts and eliminates the sliding mechanism from the seat frame structure. Instead of using a complex sliding seat frame to achieve bed mode, the design uses a stationary seat frame combined with a pivotally connected back frame that can be folded down. This removal of the sliding mechanism significantly simplifies the overall frame structure while maintaining the ability to transform between sitting and bedding modes.
5Adaptability or versatility
If a sliding seat frame is used to enable bed mode, then the bedding mode functionality is achieved, but the cushion and frame remain separate components that are difficult to integrate
Solution Approach 1:
By removing the sliding seat frame mechanism, the invention creates a stable, stationary base structure that allows the cushion to be securely integrated with the frame. The stationary seat frame provides a fixed foundation where the cushion can be firmly attached, eliminating the separation issue that existed with sliding mechanisms.
6Strength
If the supporting frame is rearwardly extended to provide support, then the supporting strength is improved, but the rear edge may bias against the wall surface and cause damage
Solution Approach 1:
The supporting frame is segmented into two separate supporting legs rather than a single extended rearward structure. The first supporting leg is positioned at the front end and the second supporting leg at the rear end, both extending downward rather than rearward. This segmentation eliminates the need for rearward extension that would cause the frame to bias against the wall surface, preventing potential damage while maintaining supporting strength through the distributed leg configuration.
Data Source
AI summary
A multifunctional furniture includes a stationary seat frame, a supporting frame, a back frame pivotally connected to the stationary seat frame to move between a sitting mode and a bedding mode, and a leg frame arrangement, which is provided underneath the stationary seat frame, the back frame and the supporting frame. When the back frame is in the sitting mode, the back frame is pivotally extended from the leg frame arrangement to form a predetermined angle of inclination with respect to the stationary seat frame while the leg frame arrangement is arranged to support the stationary seat frame, wherein when the back frame is in the bedding mode, the back frame is pivotally moved to align with the seat frame to form a sleeping area, while the leg frame arrangement is operated to provide extensive support to both the back frame, the stationary seat frame and the supporting frame.