Guide Rail Quick Fastening to Prevent Accidental Release
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Solution Overview
Problem
Existing guide rails on grid-like side parts of appliances can unintentionally release from their mounting bars under extreme conditions or deformation, leading to insecure fixing.
Innovation Solution
The guide rail features a catch lug with its upper end protruding into an aperture of the mounting element's leg, ensuring it can only be manually released by pulling it downwards, preventing accidental disengagement, and additional design features like an inclined side edge and embossed beads provide enhanced security against unintended release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the catch lug extends to the horizontal center plane of the bar, then the guide rail can be easily mounted and dismounted, but the guide rail may unintentionally release under extreme conditions or deformation
Solution Approach 1:
The upper end of the catch lug is nested within the aperture of the upper leg, creating a nested structure where the catch lug is partially contained within the mounting element. This nesting provides a detent position that secures the guide rail while still allowing manual release when needed.
Solution Approach 2:
The aperture in the upper leg acts as an intermediary structure between the catch lug and the rest of the mounting element. This intermediary feature provides a dedicated detent position that enhances security without complicating the overall mounting mechanism.
2Adaptability or versatility
If the catch lug is positioned to allow manual release, then the guide rail can be detached when needed, but accidental release becomes possible under extreme circumstances
Solution Approach 1:
The catch lug's upper end is nested within the aperture, creating a detent position that requires deliberate manual action to overcome. The nested structure provides a mechanical barrier against accidental release while maintaining the ability to release when intentionally operated.
Solution Approach 2:
The aperture provides a pre-prepared detent position that cushions against accidental release forces. This beforehand prepared structure absorbs and redirects forces that might otherwise cause unintended release, while still allowing controlled release when needed.
3Reliability
If the side edge of the catch lug is tilted in the direction of the bar, then lateral forces secure the mounting element further, but the structure becomes more complex
Solution Approach 1:
Only the side edge of the catch lug is tilted, while the rest of the structure remains simple. This local application of the tilted geometry provides enhanced security against lateral forces without requiring complex changes to the overall mounting element design.
Solution Approach 2:
The tilted side edge creates an asymmetric geometry that provides directional stability against lateral forces. This asymmetric feature is applied minimally to the catch lug, providing enhanced security without proportionally increasing overall structural complexity.
Data Source
AI summary
A guide rail configured to be mounted on bars of a grid side part of a household appliance or furniture. The bars run horizontally and are bent at an angle in bent end regions. The guide rail includes a quick fastening device including two mounting elements attached in end regions of the guide rail and configured to be detachably fixed to the bars of the grid side part. A first mounting section partially encloses one of the bars in a longitudinally extending region of the bar. A second mounting section partially encloses the bar at one of the bent regions of the bar. One of the mounting sections faces a rear bent end region and is open in a direction towards a rear of the guide rail. A resilient catch lug extends upward from the leg and engages behind the bar that is enclosed by the mounting elements.