Stacking Chair Side Support Layout for Stable Vertical Nesting
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Solution Overview
Problem
Conventional stacking chairs become unstable when stacked due to forward displacement, which shifts the center of gravity and can lead to tipping.
Innovation Solution
The design incorporates a pair of side supports that extend from the backrest to the seat, allowing upper chairs to nest inside lower chairs, providing lateral support and maintaining vertical stacking, thus reducing forward creep and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If chairs are stacked with upper chairs displaced forward of lower chairs, then stacking is easier, but stability deteriorates due to forward creep of center of gravity
Solution Approach 1:
The side supports of the upper chair are inserted into the side supports of the lower chair, creating a nested configuration that prevents forward displacement while enabling easy stacking through vertical alignment
Solution Approach 2:
The side supports extend forward to provide lateral support that maintains the center of gravity in a neutral position, preventing the forward creep that would otherwise occur during stacking
2Stability of the object's composition
If side supports extend from backrest to seat, then lateral support is provided, but device complexity increases
Solution Approach 1:
The side supports serve multiple functions: they provide lateral support to prevent tipping, enable nesting with adjacent chairs, and maintain vertical alignment during stacking, thereby reducing the need for separate stabilizing components
Solution Approach 2:
The side supports are integrated as part of the chair frame structure, combining the stabilizing function with the existing structural elements rather than adding separate discrete components
Data Source
AI summary
A stacking chair system with a plurality of stacking chairs each comprising a seat frame and a backrest frame, and a pair of side legs on each side of the seat frame. A pair of side supports extends from a top of the backrest to a front of the seat. An upper chair is stackable upon a lower chair, with the pair of side legs of the upper chair inside the pair of side supports of the lower chair, and the pair of side legs of the lower chair inside the pair of legs of the upper chair.