Seat Support Spring Assembly for Recliner Cushion Clearance
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Solution Overview
Problem
Furniture mechanisms that allow leg rest movement and seat reclining often experience interference from cushions, which protrude into voids and affect the performance of the mechanism due to pressure exerted by occupants.
Innovation Solution
A seat support assembly comprising a frame, two seat springs, a support spring, and a coil spring, where the coil spring is positioned between the seat springs to bias them against the cushion, preventing interference with the movement mechanism and providing support without bulky fixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional bulky support fixture is used under the cushion, then the cushion is well supported, but it interferes with the movement mechanism components positioned underneath
Solution Approach 1:
The support function is divided into multiple discrete springs (coil springs and support springs) distributed across the frame, replacing a single bulky fixture. This segmentation allows the support structure to be distributed and minimized, preventing interference with the movement mechanism while maintaining cushion support.
Solution Approach 2:
The support springs are positioned in the vertical dimension between the cushion and the frame, utilizing the vertical space rather than occupying horizontal space under the cushion. This dimensional arrangement allows the support function to be achieved without interfering with the horizontal movement mechanism components.
2Ease of operation
If the cushion is allowed to move freely under pressure, then comfort is improved, but the cushion protrudes into the void and interferes with the mechanism
Solution Approach 1:
The springs are pre-loaded to exert an upward biasing force on the cushion before any interference occurs. This preliminary counter-action prevents the cushion from protruding into the void and interfering with the movement mechanism, while still allowing controlled movement for comfort.
Solution Approach 2:
The spring system changes the mechanical parameters of the cushion support, providing a controlled resistance force that limits cushion displacement. This allows the cushion to move enough for comfort while preventing excessive protrusion that would interfere with the mechanism.
3Object-affected harmful factors
If springs are used to support the cushion, then interference with the movement mechanism is minimized, but additional components (coil spring, support spring) are introduced
Solution Approach 1:
The spring assembly serves multiple functions simultaneously: supporting the cushion, preventing cushion interference with the movement mechanism, and potentially providing shock absorption. This multi-functionality justifies the added components by consolidating multiple requirements into a single system.
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 support assembly effectively supports the cushion without interfering with the movement mechanism, maintaining a predetermined clearance and enhancing comfort by providing firmer support while minimizing interference and accommodating space efficiently.
Implementation Method 1
A coil spring may be positioned on and attached to the support spring. The coil spring may extend to and bias against the two seat springs positioned on either side of the support spring.
Implementation Method 2
The coil spring may support and bias the seat springs toward the cushion, and the support spring may support and bias the coil spring toward the seat springs.
Data Source
AI summary
A seat support assembly supports a cushion of a furniture member. The seat support assembly may include a frame, at least two seat springs, a support spring, and a coil spring. The support spring may be positioned between two seat springs, and the seat springs and the support spring may extend across the frame. A coil spring may be positioned on and attached to the support spring. The coil spring may extend to and bias against the two seat springs positioned on either side of the support spring.