Tilted Support Column Seat With Tri-Planar Rocking Base
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Solution Overview
Problem
Conventional seating designs fail to optimally interact with the musculoskeletal system, leading to discomfort, fatigue, and poor posture during prolonged sitting, as they do not effectively utilize gravitational forces to reduce compressive forces and enhance counterforces, thereby limiting mobility and stability.
Innovation Solution
A seat with a non-vertical central supporting column and a tri-planar movable base that aligns the sitter's body to optimize gravitational interactions, allowing for stable and mobile positions through a combination of rocking, tilting, and rotational motions, while maintaining a direct connection with the earth, thus facilitating ergonomic support and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional vertical supporting column is used, then the seat structure is simple and stable, but it fails to optimize gravitational forces and increase muscular tension
Solution Approach 1:
The supporting column is designed with an asymmetric tilt angle (5-15 degrees from vertical) to optimize the line of gravity passage through the sitter's body. This asymmetric configuration allows gravity to act more effectively through the musculoskeletal system, reducing compressive forces and increasing counterforces, while maintaining structural simplicity.
Solution Approach 2:
The tilt angle of the supporting column is optimized within a specific range (5-15 degrees) to achieve the best gravitational force interaction. This parameter optimization allows the seat to maximize the beneficial effects of gravity on the sitter's posture and musculoskeletal system without requiring complex mechanisms.
2Adaptability or versatility
If a fixed base is used, then the seat provides stability, but it limits mobility and adaptability for various seated activities
Solution Approach 1:
The base is designed with dynamic characteristics, allowing it to rock and tilt within controlled ranges while maintaining stability. The base can rock forward and backward within 10-30 degrees and tilt laterally within 10-20 degrees, providing adaptability for various seated activities while preserving stability through its centered mass and geometry.
Solution Approach 2:
The base incorporates multi-directional movement capabilities, adding rotational and tilting dimensions to the traditionally fixed base. This allows the seat to adapt to various postures and activities by moving in multiple dimensions (rocking forward-backward, tilting left-right, rotating) while maintaining overall stability.
3Force
If the seat pan is positioned directly over the supporting column, then the structure is simple, but it does not open a passageway for gravity's forces to travel vertically
Solution Approach 1:
The seat pan is positioned asymmetrically relative to the supporting column, offset by 2-6 inches to create a passageway for gravity's forces. This asymmetric positioning allows the line of gravity to travel vertically through the sitter's body without interruption, optimizing the interaction between gravity and the musculoskeletal system.
Solution Approach 2:
The offset position of the seat pan creates an intermediary space or passageway between the supporting column and the sitter's body, allowing gravity's forces to travel vertically through this intermediate zone. This mediates the interaction between the supporting structure and the sitter, enabling optimized gravitational force transmission.
4Ease of operation
If a complex mechanism is added to enable rocking and tilting motions, then mobility increases, but the device complexity and manufacturing cost increase
Solution Approach 1:
The base is designed to perform rocking and tilting motions through its own geometry and mass distribution, without requiring external actuators or complex control mechanisms. The centered mass and specific geometric configuration enable the base to naturally rock and tilt in response to sitter movements, making the system self-regulating and mechanically simple.
Data Source
AI summary
An ergonomic pedestal seat that interacts with the sitter's musculoskeletal system in a way that optimizes their use of gravitational forces is provided. This seat orients a sitter toward an alignment that encourages a balance between gravity's descending force and its ascending counterforce, the ground reaction force. The seat comprises a four-tier seat base, a non-vertical central supporting column and a contoured seat pan. The base has a surface that allows the sitter to sustain a stable alignment and to rock forward or sideward or both, as well as a Lazy Susan mechanism that permits turning. This seat supports the sitter through a range of seated activities, including quiet activities such as meditation and complex tasks requiring reaching, bending and turning. When on this seat sitting becomes a source of pleasure rather than an activity of drudgery.