Spring-Loaded Rocker Mechanism for Active Dynamic Seating Furniture
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Solution Overview
Problem
Existing seating furniture mechanisms are expensive, complex, and aesthetically undesirable, failing to provide dynamic movement options that enhance blood flow and posture change while seated, particularly for users with heavier body weights.
Innovation Solution
A spring-loaded rocker mechanism with intersecting lever arms is integrated into the chair's supporting frame, allowing for active dynamic forward and backward rocking movements, as well as sideways motion, using elastically deformable elements for adjustable motion characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If expensive tilting hardware is used to enable backward tilting of the seat surface, then movement possibilities are improved, but device complexity and cost increase substantially
Solution Approach 1:
The rocker mechanism utilizes the user's own body weight and movements to generate the rocking motion, eliminating the need for expensive motorized or gas-pressure assistance systems. The elastic elements store and release energy during the rocking cycle, providing self-sustaining motion that adapts to different user weights and movement patterns.
Solution Approach 2:
The invention extracts the essential function of enabling movement from complex motorized systems and implements it through a simplified mechanical rocker mechanism with elastic elements. This removes unnecessary complexity while retaining the core functionality of providing adaptive movement possibilities.
2Ease of operation
If complex tilting mechanisms are implemented to provide dynamic movement, then mobility is improved, but manufacturing cost and structural height increase
Solution Approach 1:
The rocker mechanism employs simple, inexpensive components such as lever arms, connection elements, and elastic elements that can be manufactured at low cost. These components are designed for durability but use readily available materials and standard manufacturing processes, making the overall system economically viable for mass production.
Solution Approach 2:
The rocker mechanism is divided into separate, modular components including first and second lever arms, connection elements, and elastic elements. This segmentation allows for independent manufacturing, assembly, and replacement of individual parts, reducing overall manufacturing complexity and cost while maintaining mobility functionality.
3Reliability
If traditional cam track mechanisms with fixed rotation axes are used, then standing-up assistance is provided, but dynamic seated movement possibilities are limited
Solution Approach 1:
The rocker mechanism replaces fixed cam track paths with a dynamic system where the effective rotation axis shifts continuously during the rocking motion. The lever arms and elastic elements create a moving pivot point that adapts to the user's weight and movement intensity, enabling both reliable standing-up assistance and diverse dynamic seated movements including forward-backward rocking and sideways motion.
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 solution provides a stable, aesthetically appealing, and cost-effective dynamic seating experience that suits various chair designs, improving user mobility and comfort without the need for expensive hardware, suitable for both office and residential use.
Implementation Method 1
elastically deformable elements for adjustable motion characteristics
Data Source
AI summary
The invention relates to a rocker mechanism for an active dynamic seating furniture with a seat surface (2) and with a supporting frame (10), which bears the seat surface (2), wherein the supporting frame (10) is designed with the spring-loaded rocker mechanism (20) and in this way the seat surface (2) is mounted movably sprung on the supporting frame (10).