System and method for a spring mechanism for a wall bed
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Solution Overview
Problem
Conventional spring mechanisms for wall beds experience structural fatigue and lack adjustable tension, leading to ineffective deployment and retraction, especially when accommodating different mattress weights.
Innovation Solution
A spring mechanism with a pivoting lever arm and compression spring arrangement, featuring arcuate-shaped coupling portions along the lever arm for adjustable compressive force, allowing for multiple settings to accommodate varying mattress weights and ensuring reliable deployment and retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single spring arrangement is used in the spring mechanism, then the structure is simple and easy to manufacture, but the mechanism experiences structural fatigue after repeated deployment and retraction, leading to ineffective deployment and retraction
Solution Approach 1:
The single spring arrangement is divided into a first spring and a second spring, each independently mounted to the cabinet and bed frame. This segmentation distributes the mechanical load across multiple springs, preventing structural fatigue in any single spring while maintaining manufacturing simplicity through modular installation.
Solution Approach 2:
The patent includes a replacement ring mechanism that allows one spring to be replaced when fatigued while the other spring continues to support the bed frame. This ensures continuous operation and reliability by recovering functionality through sequential replacement rather than requiring complete system failure before maintenance.
2Device complexity
If a single spring arrangement is used in the spring mechanism, then the device complexity is low, but the mechanism lacks adjustable tension, preventing accommodation of different mattress weights
Solution Approach 1:
The patent introduces adjustable tension mechanisms including a first tensioning mechanism for the first spring and a second tensioning mechanism for the second spring. These dynamic adjustment features allow the spring tension to be customized for different mattress weights and bed configurations, transforming a static single-spring system into a dynamically adaptable dual-spring system.
Solution Approach 2:
The spring mechanism is designed with universal adaptability through multiple tension settings and the option to use different spring configurations (both springs, one spring, or alternative support). This multi-functional design allows the same mechanism to accommodate various mattress weights and bed frame requirements without requiring multiple different mechanisms.
3Device complexity
If conventional spring mechanisms are used, then the structure is simple, but the mechanism cannot provide consistent deployment and retraction force for varying mattress weights
Solution Approach 1:
The patent enables parameter changes in spring tension through the tensioning mechanisms, allowing the force characteristics of each spring to be independently adjusted. This ensures consistent deployment and retraction force across varying mattress weights by optimizing the tension parameters of the first and second springs according to specific application requirements.
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 adjustable spring mechanism provides consistent and reliable deployment and retraction of the bed frame, accommodating different mattress weights by allowing for customizable compressive force settings, thereby extending the lifespan of the mechanism.
Implementation Method 1
a compression spring arranged to apply a compressive force to the lever arm
Implementation Method 2
a pivoting lever arm operatively engaged to a piston rod and compression spring arrangement at one of a plurality of engagement points formed defined along the lever arm
Data Source
AI summary
Various embodiments of a spring mechanism for a wall bed having a bed frame pivotally mounted to a vertically-oriented stationary cabinet in which a piston rod and compression spring are operatively engaged to a lever arm at one of a plurality of coupling portions for setting a particular compressive spring force to be applied by the compression spring which is tailored to the specific weight of the pivoting bed frame being deployed or retracted are disclosed.