Integrated Self-Closing Latch for Quiet Sliding Drawer Closure
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Solution Overview
Problem
Existing self-closure devices for sliding mobile parts, such as sliding doors and drawers, face issues with incomplete closure, noise, and mechanical bumps due to complex compositions involving springs, latches, and dampeners, which are not adequately addressed in current market solutions.
Innovation Solution
A self-closure device with an integrated energy accumulator, activator latch, and dampener, featuring a single-piece integrator element with three active areas, including a swinging activator latch, a flexion area, and a guide area, which generates a counter force to absorb energy and ensure smooth closure, reducing material usage and facilitating easier installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring and latch mechanism is used to ensure complete closure, then the drawer closes properly, but a bothersome bump occurs when the drawer reaches closed position
Solution Approach 1:
The patent applies beforehand cushioning by introducing a dampener that progressively absorbs energy during the drawer's approach to the closed position. The dampener is positioned to engage before the drawer reaches full closure, gradually reducing the spring's energy and preventing the sudden bump that would otherwise occur at the end position. This cushioning action ensures smooth, quiet closure while maintaining complete closure reliability.
2Ease of operation
If recesses are made in drawer guides to assist closure, then the drawer closes using its own weight, but the drawers become heavy and wheels make noisy sounds
Solution Approach 1:
The patent merges multiple functions into a single integrated device mounted on the drawer: the spring provides closure assistance, the latch ensures complete closure, and the dampener eliminates bump noise. This unified self-closure device replaces the need for recesses in the guides, maintaining ease of operation without requiring the drawer to be pushed to almost the end position, and eliminates wheel noise by providing controlled, progressive closure.
3Reliability
If multiple separate components (latch, activator, spring, spool, dampener) are used, then the device functions reliably, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the latch, activator, spring, spool, and dampener into a single integrated self-closure device that mounts to the drawer in one unit. This merging maintains all the necessary functions for reliable self-closure while reducing the number of separate components, simplifying the overall device complexity, and making installation easier with fewer mounting points required.
Solution Approach 2:
The integrated self-closure device performs multiple functions simultaneously: the spring accumulates and releases energy for closure, the latch and activator mechanism ensures complete closure, and the dampener controls the closure speed and eliminates bumps. This multi-functional design achieves reliable self-closure without requiring separate components for each function, reducing overall device complexity.
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 ensures complete and quiet closure of sliding mobile parts by absorbing energy and reducing material complexity, allowing for versatile adaptation to different furniture forms and sizes, ensuring smooth operation in heavier applications.
Implementation Method 1
a spring and a latch linked to a coupling in the drawer. When it was moved towards its open position, the spring was tensed and fixed by means of the latch
Implementation Method 2
Incorporating the dampener makes it possible for the force exerted by the spring when it contracts to be absorbed by the same in the final stretch of the drawers journey
Implementation Method 3
a second area or flexion area (2b), which enables the activator latch (2a) to swing as a result of the elasticity of the material it is made from
Data Source
AI summary
Self-closure device for sliding mobile parts, comprising an integrator element with three active areas—one front area that forms the first area or activator latch area, which swings, a second area or flexion area, which, given the elasticity of the material, enables the activator latch to swing and a third area or guide area, which guides the translation of the device and links it to the energy accumulator and the dampener.