Chair Back Tensioning Assembly for Pelvic Pressure Relief
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Solution Overview
Problem
Conventional chair support systems fail to provide adjustable and customizable support for users, leading to discomfort and improper sitting positions that can cause undue pressure on the tailbone and pelvis.
Innovation Solution
An adjustable chair support system featuring a seat back tensioning assembly with adjustable tension members, guide members, and cables that allow for customizable tension and positioning, combined with a seat back width and depth adjustment assembly and a seat bottom adjustment assembly to redistribute pressure and improve pelvic alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional chair support systems are used, then the structure is simple, but the system fails to provide adjustable and customizable support leading to discomfort and improper sitting positions
Solution Approach 1:
The patent implements dynamic adjustability through tensioning assemblies with movable components that allow users to customize seat back tension and positioning. The system includes adjustable tension members, guide members, and cable assemblies that enable real-time modification of support characteristics to adapt to different user needs and preferences.
Solution Approach 2:
The support system is divided into separate functional modules including tensioning assemblies, guide members, cables, and adjustment mechanisms. Each component can be independently adjusted and modified, allowing granular customization of support characteristics without requiring complete system replacement.
2Object-affected harmful factors
If fixed tension support is used, then the device complexity is low, but it causes undue pressure on the tailbone and pelvis
Solution Approach 1:
The system enables continuous adjustment of tension parameters through cable length modification, pulley positioning, and spring pre-load adjustment. Users can optimize tension levels to eliminate harmful pressure points on the tailbone and pelvis while maintaining proper pelvic alignment and ergonomic sitting posture.
Solution Approach 2:
The patent introduces intermediary components such as guide members, pulleys, and tensioning assemblies that mediate between the seat back and the user's body. These intermediaries distribute and regulate forces to prevent concentrated pressure on vulnerable areas like the tailbone and pelvis.
3Ease of operation
If adjustable tension members and guide members are added, then user support and comfort are improved, but the device complexity increases
Solution Approach 1:
The system incorporates user-friendly adjustment mechanisms that allow individuals to independently modify tension and positioning without requiring technical assistance. Features include accessible cable adjustment points, intuitive tensioning controls, and self-explanatory adjustment procedures that empower users to optimize their own comfort.
Solution Approach 2:
The tensioning assembly serves multiple functions simultaneously: it provides structural support, enables position adjustment, regulates tension forces, and maintains pelvic alignment. This multi-functionality reduces the need for separate specialized components, thereby limiting the increase in overall system complexity.
Data Source
AI summary
An adjustable chair support system includes a first seat back support member spaced from a second seat back support member, and a seat back tensioning assembly that extends between the first and second seat back support members. The seat back tensioning assembly includes a carrier coupled to the first seat back support member, the carrier including an adjustable tension member and a first guide member, a pair of second guide members coupled to the second seat back support member, and a cable extending from the adjustable tension member into engagement with one of the pair of second guide members, with the first guide member, with the other of the pair of second guide members, and then returning to the adjustable tension member.