Chair Seat Plate Support Structure for Stable Lateral Holding
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Solution Overview
Problem
Conventional chairs face challenges in maintaining seating stability, as the seat plate tends to displace laterally when a user sits, and existing designs often compromise on rigidity and durability due to complex structures and separate displacement regulating mechanisms.
Innovation Solution
The chair incorporates constraining support parts and warpage allowable parts at the seat plate's lateral edges, allowing for controlled deformation and improved lateral support, combined with a bending promotion structure featuring reinforcement ribs and thinning holes to enhance flexibility and rigidity, while maintaining overall stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If engaging grooves and protrusions are provided as separate displacement regulating means, then upward/downward displacement of the seat plate is regulated, but the number of components increases and the structure becomes complicated
Solution Approach 1:
The patent combines the displacement regulating function into the seat receiving member itself by forming engaging grooves that extend in the forward/backward direction with U-shaped cross sections. The seat plate's lateral edges are engaged with these grooves, eliminating the need for separate displacement regulating means while maintaining effective upward/downward displacement regulation.
2Ease of operation
If the seat plate is formed of flexible synthetic resin to improve moldability and sitting comfort, then the seat plate can be deformed and bent downward to surround buttocks, but the rigidity and durability are compromised
Solution Approach 1:
The patent applies local quality by providing reinforcement ribs at specific locations on the seat plate - particularly at the lateral edges and in regions requiring structural support. These ribs increase local rigidity and durability where needed, while allowing other areas of the seat plate to maintain flexibility for comfort and moldability.
3Reliability
If engaging grooves are provided at almost part of the seat plate in the forward/backward direction to regulate upward/downward displacement, then displacement is controlled, but the seat plate's ability to deform and bend downward is restricted
Solution Approach 1:
The patent segments the seat plate structure by providing reinforcement ribs only at specific locations (lateral edges and selected regions) rather than continuously across the entire plate. This segmentation allows the seat plate to deform and bend downward in areas without ribs while maintaining displacement regulation through the engaging grooves at the lateral edges.
Data Source
AI summary
A chair is provided in which a seat-receiving member is provided with outward flanges for regulating upward/downward displacement to support left and right lateral edges of a seat plate. Engaging grooves supported by the outward flanges are provided at the respective left and right lateral edges of the seat plate. Warpage allowable parts in which warpage deformation of the lateral edges is allowed without the upward displacement being regulated by the seat receiving member are provided in regions of the left and right lateral edges of the seat plate, in which the regions are located at a rear side from engagement parts between the engaging grooves and the outward flanges. With this constitution, it is possible to prevent the seat plate from being detached from the seat-receiving member while ensuring that, when an user is seated, the sides of the buttocks of the user are reliably held, and thus improve the seating stability of a seat body.