Active Dynamic Stool With 3D Jointed Legs for Stable Seat Motion
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Solution Overview
Problem
Existing active-dynamic chairs restrict movement to pendulum movements around a pendulum bearing close to the ground, failing to accommodate diverse user needs for adjustable seat inclination and simultaneous torso and body movement, leading to potential discomfort and balance issues.
Innovation Solution
A three-dimensional joint system comprising at least three legs with movable connections, allowing for pendulum, circular, and torsional movements, with adjustable leg lengths and orientations to change the seat's inclination and enable horizontal translational movements, incorporating elastic joints for a restoring mechanism to return to the rest position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pendulum movements are allowed around a bearing close to the ground, then the seat can swing back and forth, but the seat inclination changes excessively and users may lose balance
Solution Approach 1:
The patent transitions from a single pendulum bearing close to the ground to a multi-dimensional joint system with at least three legs connected to the seat. This spatial arrangement enables movements in multiple dimensions (pendulum, circular, lateral, rotational) while distributing the support points to maintain stable center of gravity, preventing excessive seat inclination and balance loss.
Solution Approach 2:
The single pendulum bearing is segmented into multiple independent legs (at least three) that are movably connected to the seat. Each leg can move independently, providing distributed support and enabling complex movement patterns while maintaining overall stability through the geometric arrangement of multiple contact points with the ground.
2Device complexity
If the seat is rigidly connected to the pendulum support, then the structure is simple, but the seat inclination follows the deflection angle causing discomfort
Solution Approach 1:
The patent replaces rigid connections with dynamic, movable joints between the legs and the seat. These joints allow the legs to adapt their positions and orientations, enabling the seat to maintain a more favorable inclination angle during movements. The movable connections provide flexibility to accommodate user comfort needs while maintaining structural integrity.
3Device complexity
If only pendulum movements are permitted, then the mechanism is simple, but diverse user needs for adjustable inclination and body movement cannot be met
Solution Approach 1:
The multi-leg joint system serves multiple functions simultaneously: it enables pendulum movements, circular movements, lateral movements, and rotational movements. The same structural configuration supports various body movements including torso movement and hip rotation, making the chair adaptable to diverse user needs without requiring separate mechanisms for each function.
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
Enables safe and diverse seat movements across the entire movement space, allowing for customizable seat inclination, ensuring ergonomic support and preventing discomfort by allowing horizontal and rotational movements, thus reducing the risk of losing balance.
Implementation Method 1
incorporating elastic joints for a restoring mechanism to return to the rest position
Data Source
AI summary
The invention relates to an active dynamic stool (1) comprising the following: a seat part (2), a three-dimensional articulation system (100) made up of at least three legs (3) with foot parts (4) at the lower end thereof, wherein the legs each have their upper end mounted on the seat part (2) for movement on seat-part-mounted connecting articulations (5), such that the seat part (2) can execute oscillating and circular movements in respect of its non-deflected rest position.