Adjustable Spring Bearing for Furniture Fitting Ejection Force Tuning
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Solution Overview
Problem
Existing drive devices for furniture and construction fittings face challenges in adjusting spring forces to accommodate furniture parts of different sizes and weights, leading to unpleasant retraction and ejection forces that are too large or too small.
Innovation Solution
The bearing device is adjustable over a limited path relative to the housing, allowing for individual adaptation of spring force and deflection, with a release device for resetting the bearing device to a minimal tension position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the spring force is increased to move heavy furniture parts, then the ejection capability is improved, but the retraction force becomes too large causing unpleasant operation
Solution Approach 1:
The bearing device is made adjustable along the longitudinal axis, allowing dynamic adaptation of spring force characteristics. By changing the bearing position, the system can optimize the force balance between ejection and retraction phases according to different furniture part weights and sizes.
Solution Approach 2:
The patent changes the geometric parameter of the spring system by adjusting the bearing device position. This modifies the spring deflection and tension characteristics, enabling the same spring to provide appropriate force for both light and heavy furniture parts without causing excessive retraction force.
2Ease of operation
If the spring force is decreased for light furniture parts, then the ease of operation is improved, but the ejection capability becomes insufficient for heavy parts
Solution Approach 1:
The adjustable bearing device enables the system to switch between different force characteristics dynamically. For light furniture parts, the bearing is positioned to provide minimal retraction force, while for heavy parts, it can be repositioned to maximize ejection force capability.
Solution Approach 2:
The drive device is designed to handle multiple furniture part weights and sizes using a single spring mechanism. The adjustable bearing device allows the same spring to serve multiple functions by changing its geometric configuration, eliminating the need for multiple springs of different strengths.
3Device complexity
If a fixed spring force is used, then the device complexity is reduced, but the adaptability to different furniture part sizes and weights is limited
Solution Approach 1:
The bearing device is separated from the housing and made independently adjustable along the longitudinal axis. This segmentation allows the bearing position to be modified without changing the spring itself, providing adaptability while keeping the overall device structure relatively simple.
Solution Approach 2:
The system transitions from a fixed configuration to a dynamically adjustable one. The bearing device can be repositioned along the longitudinal axis to adapt to different furniture part requirements, providing versatility without requiring multiple fixed spring assemblies.
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 adjustment mechanism enables precise tuning of spring forces without requiring multiple rotations, ensuring comfortable operation and efficient movement of furniture parts.
Implementation Method 1
at least one spring (12) for applying a force to the at least one actuating device (11), the at least one spring (12) being connected with a first end to the at least one actuating device (11)
Data Source
AI summary
A drive device, preferably an ejection device, for a furniture fitting or a construction fitting includes a housing, an actuating device movable relative to the housing, and a spring for applying a force to the actuating device, with the spring having a first end connected to the actuating device. A bearing device supports a second end of the spring to the housing, and the bearing device is configured to be adjusted over a limited path relative to the housing.