Vehicle Seat Insert Wire Layout for Posture Stability and Comfort
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Solution Overview
Problem
Existing vehicle seats face challenges in maintaining sitting comfort performance and posture stability, particularly due to issues like buttocks sinking, forward slippage, and shearing sensation, which are not adequately addressed by simply increasing the hardness of the seat pad.
Innovation Solution
The vehicle seat design incorporates a unique arrangement of front and rear insert wires within the seat pad, where the rear insert wire is positioned ahead of the rear suspending groove and the front insert wire is behind the front suspending groove, with specific load-receiving portions that support the pelvis, optimizing pressure balance without increasing seat pad hardness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the hardness of the seat pad is increased to prevent buttocks sinking and maintain posture stability, then posture stability is improved, but sitting comfort performance deteriorates
Solution Approach 1:
The seat pad is segmented into multiple functional zones with different hardness levels. A hard portion is provided at the rear side to prevent buttocks sinking and maintain posture stability, while a soft portion is provided at the front side to ensure sitting comfort. This segmentation allows each zone to perform its specific function independently, resolving the contradiction between posture stability and sitting comfort.
Solution Approach 2:
Different regions of the seat pad are assigned different local qualities (hardness levels) according to their specific functional requirements. The rear portion has higher hardness to provide structural support and prevent pelvis rolling backward, while the front portion has lower hardness to provide comfort and reduce pressure on the thighs. This local differentiation resolves the contradiction by optimizing each region for its specific purpose.
2Object-generated harmful factors
If the seat pad is made softer to improve sitting comfort, then sitting comfort performance is improved, but posture stability deteriorates due to excessive buttocks sinking
Solution Approach 1:
The seat pad is divided into front and rear portions with different hardness characteristics. The rear portion maintains higher hardness to prevent excessive buttocks sinking and pelvis rolling backward, while the front portion is softer to improve sitting comfort. This segmentation ensures that comfort improvements do not compromise posture stability.
Solution Approach 2:
The seat pad exhibits local quality variation where the rear region has higher hardness for structural support and the front region has lower hardness for comfort. This local differentiation allows the seat pad to be soft where comfort is needed while remaining hard where posture stability is critical.
3Object-generated harmful factors
If insert wires are positioned to focus on sitting comfort by avoiding linear contact under buttocks and pelvis, then sitting comfort is improved, but pressure balance and posture support deteriorate
Solution Approach 1:
The insert wires are strategically positioned to provide localized support where needed. Wires are arranged to contact the pelvis and buttocks at specific points to maintain pressure balance and prevent excessive sinking, while the overall seat pad structure remains soft for comfort. This selective positioning resolves the contradiction between comfort and pressure balance.
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
This design effectively prevents buttocks sinking and maintains a stable posture, enhancing sitting comfort and stability by uniformly distributing body pressure, allowing for a softer seat pad without compromising support.
Implementation Method 1
a seat cushion where insert wires, which elastically deform, are inserted inside the seat pad
Data Source
AI summary
To improve sitting comfort performance and posture stability using a method other than increasing hardness of a seat pad.The present disclosure provides a vehicle seat, constituted of: a seat including a front insert wire and a rear insert wire which are disposed inside a seat pad, a backrest, and a suspending structure configured to engage a seat cover with a front suspending groove and a rear suspending groove of the seat pad. The front insert wire includes a front main load receiving portion which protrudes backward from a peripheral portion, and the rear insert wire includes a rear main load receiving portion which protrudes forward from a peripheral portion. The rear insert wire is disposed at a position where at least the rear main load receiving portion is ahead of the rear suspending groove, and the front insert wire is disposed at a position where at least the front main load receiving portion is behind the front suspending groove.