Adjustable chair support system
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional chair support systems fail to provide adequate adjustability and comfort, often leading to undesirable sitting positions that result in undue pressure on the tailbone due to insufficient support and poor pelvis alignment.
Innovation Solution
An adjustable chair support system featuring a seat back tensioning assembly with adjustable tension members, guide members, and a seat bottom adjustment assembly that allows for customizable width, depth, and height adjustments, redistributing pressure and improving pelvis alignment through orthotic-like functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional chair support systems are used, then the structure is simple, but the adjustability and comfort are insufficient leading to poor pelvis alignment and tailbone pressure
Solution Approach 1:
The support system is divided into multiple independent adjustment mechanisms: a first adjustment mechanism for modifying the contour shape of the support surface, and a second adjustment mechanism for adjusting the tension of the support member. This segmentation allows each mechanism to handle specific adjustment functions, achieving high adaptability without requiring an overly complex integrated system.
Solution Approach 2:
The support system employs dynamically adjustable components including an adjustable tension member that can modify tension levels, and an adjustable contour member that can change the shape of the support surface. These dynamic elements enable the system to adapt to different user needs and sitting positions, providing versatility while maintaining manageable complexity through focused adjustment capabilities.
2Ease of operation
If the support system is made more adjustable with multiple mechanisms, then comfort and alignment improve, but the device becomes more complex
Solution Approach 1:
The adjustment mechanisms are designed to be user-operable without requiring assistance or complex procedures. The first adjustment mechanism allows users to independently modify the contour shape, and the second mechanism enables independent tension adjustment. This self-service design improves ease of operation while keeping each mechanism relatively simple, avoiding the need for complex interconnected adjustment systems.
Solution Approach 2:
Each adjustment mechanism is designed to perform its specific function with localized components rather than requiring system-wide complexity. The contour adjustment mechanism focuses specifically on shape modification, while the tension adjustment mechanism focuses on tension control. This localization of functions improves ease of operation for each specific adjustment while preventing overall system complexity from becoming unmanageable.
3Adaptability or versatility
If fixed support structures are used, then the device is simple, but real-time adjustments while seated are not possible
Solution Approach 1:
The support system transitions from fixed to dynamic through the implementation of adjustable contour and tension members that can be modified while the user is seated. The first adjustment mechanism enables real-time contour shape changes, and the second mechanism allows real-time tension adjustments, providing adaptability without requiring complete system replacement or complex reconfiguration mechanisms.
Solution Approach 2:
The adjustment mechanisms are pre-configured to enable easy modification while seated, with components positioned and designed to allow user access and operation during use. The contour and tension adjustment mechanisms are arranged to facilitate preliminary positioning that enables subsequent real-time adjustments without requiring complex tooling or multi-step procedures.
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.