Dynamic Seat and Backrest Mechanism for Spinal Mobilization
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Solution Overview
Problem
Prolonged sitting leads to physical stress, including back, hip, and neck strain, as well as circulatory problems, potentially resulting in chronic inflammation and linked diseases such as heart disease, diabetes, Alzheimer's, and cancer, due to inadequate support and immobilization of joints.
Innovation Solution
A seat design featuring a base, a back-supporting surface, and a seating surface that are movable relative to each other, allowing the back-supporting surface to adjust in response to user force, with a mechanism enabling movement parallel to the seating surface, varying the included angle between the seating and back-supporting surfaces, and incorporating a spring bias for vertical adjustment, facilitating continuous spinal mobilization and improved circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seating surface is fixed relative to the base, then the device complexity is reduced, but the ability to provide consistent back support and mobilize the spine during prolonged sitting is compromised
Solution Approach 1:
The back-supporting surface is designed to be dynamically adjustable relative to the seating surface, allowing it to move in response to user force and automatically adjust to different body types and sitting positions. This dynamic capability enables consistent lumbar support across various users and positions without requiring complex manual adjustment mechanisms.
Solution Approach 2:
The back-supporting surface automatically adjusts to the user's back shape and position through force exerted by the user's body, eliminating the need for manual intervention. The system self-regulates to provide appropriate support based on the user's anatomy and sitting posture, reducing the need for complex control systems.
2Ease of manufacture
If the back-supporting surface is fixed, then the ease of manufacture is improved, but the ability to enhance blood flow and prevent chronic inflammation is reduced
Solution Approach 1:
The movable back-supporting surface creates dynamic interaction with the user's back during sitting, producing gentle pressure changes and spinal mobilization that enhance blood flow and prevent the chronic inflammation associated with prolonged static sitting. This dynamic movement is achieved through simple mechanical coupling that allows natural body movements to drive the adjustment.
3Adaptability or versatility
If the seating surface and back-supporting surface are independently movable, then the adaptability to different body types is improved, but the device complexity increases
Solution Approach 1:
The seat is divided into independently movable segments: the seating surface relative to the base, and the back-supporting surface relative to the seating surface. This segmentation allows each component to adjust independently to accommodate different body types and sitting preferences, while the simplicity of each individual mechanism keeps overall complexity manageable.
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 seat design provides consistent back support, reduces the likelihood of injury by enhancing blood flow and mobilizing the spine, thereby preventing chronic inflammation and promoting healthier sitting positions.
Implementation Method 1
The back-supporting surface is biased to move away from the seating surface in the direction perpendicular to the seating surface. A spring biases movement of the back-supporting surface away from the seating surface in the direction perpendicular to the seating surface.
Implementation Method 2
The seating surface is biased to move toward the back-supporting surface under the force of gravity.
Data Source
AI summary
Among other things, a seat includes a base; a back-supporting surface coupled to the base; and a seating surface movable relative to the base in a direction of motion toward and away from the back-supporting surface. The back-supporting surface has a lower portion nearer the seating surface that is movable, relative to an upper portion of the back-supporting surface that is farther from the seating surface, in the direction of motion as the seating surface moves in the direction of motion.