Waist Support Chair with Segmented Back Support for S-Shaped Spine Fit
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Solution Overview
Problem
Ergonomic office chairs fail to provide intimate and compliant support for the S-shaped spine, leading to waist diseases due to insufficiently convex waist support structures.
Innovation Solution
A waist support chair design featuring left-right symmetric upper and lower support members, with hollow elastic columns on the chair bottom that compress to release air, providing comfortable hip support and separate back and waist support through a framework of pivotally coupled back and chair bottom components, elastic support bands, and ventilation holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the waist support structure is made sufficiently convex to support the S-shaped spine, then back support is improved, but the user's back cannot contact the chair back intimately
Solution Approach 1:
The back support function is segmented into two independent members: the upper support member for back support and the lower support member for waist support. This segmentation allows each member to be optimized independently - the lower support member can be sufficiently convex to support the S-shaped spine while the upper support member provides back support, resolving the contradiction between support effectiveness and contact intimacy.
Solution Approach 2:
Different parts of the back support system have different support characteristics. The lower support member has a convex shape specifically designed to match the S-shaped spine curvature, while the upper support member has a different configuration for back support. This local differentiation allows intimate contact in the back region while providing sufficient convex support in the waist region.
2Reliability
If the waist support structure is made excessively convex to provide sufficient support, then waist support is improved, but the user's back cannot contact the chair back intimately
Solution Approach 1:
The support function is divided into two independent members positioned at different locations. The lower support member is placed at the waist position with sufficient convexity to support the S-shaped spine, while the upper support member is positioned higher on the back. This spatial segmentation allows the lower member to be excessively convex for waist support without preventing back contact, as the upper member handles back support.
Solution Approach 2:
The solution moves from a single-point support approach to a two-dimensional distribution of support members. By placing support members at different vertical positions (upper and lower), the system can provide both waist support through convexity and back contact intimacy simultaneously, as each dimension (vertical position) serves a different function.
3Device complexity
If a single support structure is used for both back and waist, then device complexity is reduced, but the ability to support S-shaped spine intimately is compromised
Solution Approach 1:
The support structure is segmented into two independent members: upper support member and lower support member. Each member can be independently adjusted and positioned to match the user's body contours. The lower support member specifically supports the waist area with appropriate convexity, while the upper support member supports the back, together providing comprehensive S-shaped spine support.
Solution Approach 2:
The support members are designed to be adaptable to different user body shapes and sitting positions. The hollow elastic columns can compress and expand to accommodate different users, and the support members can be positioned at different heights and angles. This dynamic adaptability allows the segmented structure to provide intimate support for the S-shaped spine while maintaining reasonable device complexity.
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 chair offers intimate and compliant support for the back and waist, promoting comfort and reducing the risk of waist diseases by distributing pressure effectively and allowing air release for hip relaxation.
Implementation Method 1
a plurality of hollow elastic columns, which are compressed to release air while pressurized
Implementation Method 2
a plurality of elastic support bands, wherein one end of each of the elastic support bands is connected with the upper connection portion, and the other end of each of the elastic support bands is connected with a corresponding one of the support planes; when any one of the support planes is applied with pressure, the support plane moves backward, and the elastic support bands corresponding to the support plane are bent and feeds back a counterforce to the support plane
Data Source
AI summary
A waist support chair includes a framework, a back support member, and a hips support member. The framework includes a back support frame and a chair bottom pivotally coupled to each other. The back support member is arranged on the back support frame and adjacent to the chair bottom. The back support member includes two upper support elements horizontally disposed and left-right symmetric to each other and two lower support elements horizontally disposed and left-right symmetric to each other. Two lower support elements are disposed between two upper support elements and the chair bottom. The hips support member is arranged on the chair bottom and includes a plurality of hollow elastic columns. When pressure is applied to the hollow elastic columns, the hollow elastic columns are compressed to release air.