Seat Chassis Footrest Pivot Mechanism for Slim Retraction
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Solution Overview
Problem
Current seating/reclining furniture chassis designs lack a compact and versatile mechanism for adjusting footrests, which limits their application range and design flexibility while increasing production complexity and costs.
Innovation Solution
A seating/reclining furniture chassis with a base, a seat frame movably attached via standing levers, a pivotally mounted bracket, and a pivot gear coupled with a damping unit and helical spring, allowing the seat frame to pivot from a retracted to an extended position, with a support mechanism that includes a gas spring or electric motor drive for efficient adjustment and a slim design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional footrest adjustment mechanism is used, then the footrest can be adjusted, but the design becomes complex and costs increase
Solution Approach 1:
The patent combines the footrest support function with the seat frame pivot mechanism into a single integrated assembly. The support is directly pivotally connected to the seat frame, eliminating the need for separate adjustment mechanisms. This merging of functions reduces device complexity while maintaining adaptability across different furniture applications.
Solution Approach 2:
The integrated support and seat frame pivot mechanism serves multiple functions: it provides structural support, enables seat frame pivoting, and acts as the footrest support. This multi-functionality allows the same mechanism to be used across various seating and reclining furniture types, increasing adaptability without adding complexity.
2Volume of moving object
If the footrest is fully retracted under the seat frame, then the design becomes compact, but the mechanism requires precise positioning
Solution Approach 1:
The patent uses a retaining spring to create a stable equilibrium position for the support in its retracted state. The spring force balances the gravitational and mechanical forces, holding the support firmly in its retracted position without requiring complex positioning mechanisms. This achieves compact retraction while maintaining positioning stability through force balance.
3Length of moving object
If a slim design is implemented, then the front seating area becomes narrower, but the mechanism has limited adjustment range
Solution Approach 1:
The patent implements a dynamic pivoting mechanism that allows the support to rotate through a wide angle range (90°, 120°, or 180°) relative to the seat frame. The pivotal connection enables the support to adapt its position dynamically, achieving both a slim design when retracted and full adjustment range when extended, thus resolving the contradiction between compactness and versatility.
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
This design enables a wide range of applications with a compact, slim, and adjustable footrest mechanism that can pivot by 90°, 120°, or 180°, ensuring the footrest is fully retracted under the seat frame, reducing rework and allowing for a particularly narrow and stable construction with improved ease of movement.
Implementation Method 1
the swivel gear is coupled to the seat frame via a damping unit
Implementation Method 2
the support is held in the retracted position by a support retaining spring, and the support retaining spring is designed as a helical spring
Implementation Method 3
The damping unit can have at least one damping element and at least one energy storage element, wherein the damping element can be a gas spring
Data Source
Figure 1a~1b
Figure 2
Figure 3a~3b
AI summary
The seat or couch furniture chassis (1) has a lower frame, a seat framework, which is movably attached at the lower frame over condition levers, a support (12), which is installed at the seat framework over a support framework around a drag axis in tiltable manner and a panning drive. The panning drive is coupled over an absorption unit with the seat framework, and the support is held in the brought in position by a support retaining spring.