Load support structure for chair, load support body for chair, and chair
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Solution Overview
Problem
Existing chair load support structures fail to prevent excessive displacement while allowing elastic deformation, leading to instability and discomfort, especially when a large load is applied off-center.
Innovation Solution
A load support structure featuring a tensile material attached to elastically deformable support sections, reinforced by perpendicular sections and connecting bodies that enhance stability and suppress excessive displacement, with the support sections being disposed outside the reinforcing sections to wrap around the seated person.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the support section is made elastically deformable to follow the user's body, then comfort is improved, but excessive displacement occurs leading to instability
Solution Approach 1:
The support structure is divided into multiple support sections (first, second, third, and fourth support sections) that are spatially separated and independently deformable. Each support section can elastically deform to follow the user's body contours while the distributed arrangement prevents excessive displacement of any single section, thereby maintaining overall stability.
Solution Approach 2:
The support sections are arranged in multiple spatial dimensions (front-rear, left-right, and up-down directions) rather than a single linear arrangement. This multi-dimensional distribution allows the structure to absorb and distribute deformational forces across different directions, enabling individual sections to deform for comfort while the collective arrangement prevents excessive displacement.
2Stability of the object's composition
If the frame member is made rigid to provide stable support, then stability is improved, but the seated person feels pain or discomfort from hard frame contact
Solution Approach 1:
Different parts of the support structure have different mechanical properties: the support sections are designed to be elastically deformable for comfort, while the connecting bodies and reinforcing sections maintain higher rigidity for stability. This local differentiation allows the frame to provide stable support where needed while conforming to the user's body where contact occurs.
Solution Approach 2:
The support sections function as flexible structural elements that can elastically deform to conform to the user's body shape, similar to flexible shells. These sections are arranged in a multi-dimensional pattern and connected by rigid connecting bodies, creating a hybrid structure that combines flexibility for comfort with rigidity for stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure effectively suppresses excessive displacement and allows for stable, comfortable seating by enabling elastic deformation of the support sections to conform to the user's body, while maintaining stability and preventing discomfort from hard frame contact.
Implementation Method 1
a support section to which the tensile material is attached and that is elastically deformable in response to a force acting from the tensile material
Data Source
AI summary
A load support structure for a chair includes a tensile material on which a load support surface configured to receive a load of a seated person is formed, a pair of support sections (51) to which the tensile material is attached, and which is elastically deformable in response to a force acting from the tensile material, a first reinforcing section (41) which is disposed to be spaced apart from the pair of support sections (51) in a surface perpendicular direction perpendicular to the load support surface, is located on a side opposite to the load support surface, and extends along an extending direction of the support section, and a connecting body which connects each of both end portion sides of the support section (51) with a corresponding end portion side of both end portion sides of the first reinforcing section (41), in which the support sections (51) are disposed outside the first reinforcing section (41) in a view of the surface perpendicular direction from the load support surface side.