Pivotable Lumbar Support Chair for Dynamic Lordotic Curve Maintenance
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Solution Overview
Problem
Current lumbar supports fail to provide adequate customization for various body shapes and do not maintain the lumbar lordotic curve when users lean forward, leading to poor posture and back pain.
Innovation Solution
An adjustable lumbar support system with a foam seat cushion that tilts users backward and features ergonomically shaped cushions with multiple adjustment modes, allowing for customizable support from a hypolordotic to hyperlordotic curve, and providing spinal joint mobilization and curve correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current lumbar supports are used, then basic back support is provided, but they fail to accommodate different elliptical curves and body shapes, leading to poor posture and back pain
Solution Approach 1:
The lumbar support features a freely pivotable seat back that can rotate about a lateral axis, allowing the support surface to dynamically adjust to different lumbar curves and body shapes. This dynamic adjustment capability enables the device to adapt to various elliptical curves in the user's lumbar spine, resolving the contradiction between providing basic support and accommodating diverse body types.
Solution Approach 2:
The lumbar support is designed with universal applicability through its pivotable mechanism that can accommodate multiple lumbar curve configurations. The same device can serve users with different body shapes and lumbar elliptical curves by adjusting the pivot angle, making it universally adaptable rather than requiring multiple specialized supports.
2Reliability
If fixed lumbar supports are used, then simple structure is maintained, but they do not maintain the lumbar lordotic curve when users lean forward
Solution Approach 1:
The seat back is designed to freely pivot about a lateral axis, allowing it to maintain contact with the user's lumbar region even when the user leans forward. This dynamic pivoting action ensures continuous maintenance of the lumbar lordotic curve throughout various seating positions, resolving the contradiction between structural simplicity and curve maintenance reliability.
3Adaptability or versatility
If adjustable lumbar supports are used, then customization is improved, but device complexity and adjustment mechanisms increase
Solution Approach 1:
The lumbar support utilizes the user's own body weight and positioning to automatically adjust the seat back angle. As the user shifts position or leans forward, gravity and body mechanics naturally cause the pivotable seat back to rotate to the appropriate angle, eliminating the need for complex manual adjustment mechanisms while maintaining high adaptability.
Data Source
AI summary
A portable lumbar support and ergonomic chair having a lumbar support. The lumbar support has a seat hingedly coupled to a seat back having a teardrop-shaped lumbar support seat back cushion. A rigid back support portion may be rotated forward about hinges to collapse substantially parallel to the seat frame and backward to open to a variety of angles with respect to the seat frame. The seat back freely pivots around an upper lateral axis, and the rigid back support portion is linearly adjustable to space the seat back toward and away from the hinges to enable raising or lowering the upper lateral axis and thus the seat back with respect to the lower lateral axis. This provides multiple ways of changing which part of the teardrop-shaped lumbar support curve hits your lumbar curve for proper support. Variable lumbar lordotic support is thus provided.