Back support assembly and chair
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Solution Overview
Problem
Elastic mesh fabric in chairs loses its ability to provide reliable back support over time due to irreversible deformation, leading to reduced cushioning and discomfort.
Innovation Solution
A back support assembly comprising a back support frame, an elastic support member, and elastic support rods and sheet with varying stiffness levels, allowing for sequential deformation and support to maintain comfort and support over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If elastic mesh fabric is used to support the back, then leaning comfort is improved through adaptation to back shape, but back support reliability deteriorates over time due to fabric loosening
Solution Approach 1:
The back support assembly is divided into multiple functional segments: elastic support rods (first elastic component), elastic support sheet (second elastic component), and elastic support member (third elastic component). Each segment performs a specific deformation function in sequence, preventing any single component from bearing excessive stress that would cause loosening over time.
Solution Approach 2:
The patent implements a dynamic multi-stage deformation system where components deform in sequence based on applied force magnitude. The elastic support rods deform first, followed by the elastic support sheet, then the elastic support member. This dynamic response adapts to different leaning intensities while maintaining consistent support reliability through the coordinated action of all components.
2Device complexity
If a single elastic component is used, then device complexity is reduced, but the ability to provide sequential deformation and consistent support is insufficient
Solution Approach 1:
The support system is segmented into three distinct elastic components with different deformation characteristics. The elastic support rods provide initial deformation, the elastic support sheet provides intermediate deformation, and the elastic support member provides final deformation. This segmentation enables consistent support through coordinated multi-stage deformation while managing overall system complexity.
Solution Approach 2:
The patent employs a composite structure combining different types of elastic components (rods, sheets, and members) with varying stiffness and deformation capacities. This composite approach allows each component to contribute its unique deformation characteristics, achieving reliable consistent support through the synergistic effect of diverse elastic elements.
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 assembly ensures consistent cushioning and support even after long-term use by utilizing a dual elastic support structure with rods and sheets that deform in sequence to provide adequate support and comfort.
Implementation Method 1
an elastic support member (120), a plurality of elastic support rods (130), and an elastic support sheet (140)
Implementation Method 2
a plurality of elastic support rods (130) arranged at an angle to each other. One end of each of the plurality of elastic support rods is connected to a side, facing away from the connection portion, of the middle section of the elastic support member
Data Source
AI summary
A back support assembly includes: a back support frame, an elastic support member, a plurality of elastic support rods, and an elastic support sheet. The back support frame has a connection portion. The elastic support member is in a strip shape. Two ends of the elastic support member are connected to the connection portion, and a middle section of the elastic support member is bent towards a direction facing away from the connection portion. One end of each of the plurality of elastic support rods is connected to a side, facing away from the connection portion, of the middle section of the elastic support member, and the other end of the elastic support rod is bent towards a side facing away from the elastic support member and is connected to a back face of the elastic support sheet.