Removable Rail System with Spring-Biased Locking for Appliance Safety
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Solution Overview
Problem
Existing household and commercial appliances, such as ovens and dishwashers, face issues with unintentional movement of rail systems when the carrying device is removed, posing safety risks due to potential accidental extension or retraction of rails, especially when the device is tilted or rotated during cleaning.
Innovation Solution
A locking unit with a spring-biased locking element that automatically transitions between a blocked and free state, ensuring the rail system remains secure regardless of the carrying device's orientation, eliminating the need for user intervention to lock or unlock the rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the carrying device is removed from the housing for cleaning purposes, then the rail system can be accessed and cleaned, but the rails may unintentionally move or extend due to gravity when the device is tilted or rotated
Solution Approach 1:
The locking element automatically locks the rail system when the carrying device is removed, without requiring user intervention. The spring mechanism self-activates upon removal to engage the locking element, preventing unintentional movement during cleaning operations
Solution Approach 2:
The locking element is positioned and biased by the spring to preemptively prevent unwanted rail movement before it can occur. When the carrying device is removed, the locking element is already in place to counteract any gravitational forces that might cause accidental extension or retraction
2Reliability
If a locking mechanism is added to prevent unintentional rail movement, then safety is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism operates automatically without user intervention. The spring-loaded locking element engages when the carrying device is removed and disengages when it is reinstalled, eliminating the need for separate locking/unlocking actions by the user
Solution Approach 2:
The locking function is extracted as a separate, dedicated component (locking element) that works independently from the carrying device structure. This modular approach allows the locking mechanism to be simple and focused on its single function of preventing rail movement
3Ease of operation
If the locking element is automatically activated upon removal, then user intervention is eliminated, but the mechanism requires additional components
Solution Approach 1:
The locking element is automatically activated by the spring mechanism when the carrying device is removed from the housing. This self-activating feature eliminates the need for user intervention while keeping the component structure minimal and focused
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 effectively prevents unintentional pull-out of the rail system, enhancing operational safety by maintaining the rail system's secure state across various orientations and usage scenarios, including when the device is tilted or rotated, thus preventing injuries and damage.
Implementation Method 1
The locking element is biased against the force of a spring in the free state of the locking unit
Data Source
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AI summary
The present application relates to a household appliance (2) or commercial appliance for cleaning, storing or cooking objects, comprising a housing (6) formed by walls (4) by means of which an interior space (8) is spatially enclosed, and at least one support device (30, 430) removable from the interior space (8), wherein the support device (30, 430) comprises at least one rail system (34, 434) with at least two interconnected rails (36, 436 and 38, 438) movable relative to each other, and at least one support element (32, 432), wherein, when the support device (30, 430) is in an installed state, the rail system (34, 434) is mounted on the housing (6) in such a force-transmitting manner that the support element (32, 432) can be moved relative to the housing (6) by extending the rail system (34, 434), wherein a support device (30, 430) is attached to the housing (6). 430) arranged locking unit (400) comprising at least one locking element (402),The locking unit (400) is convertible between a locked state and a free state, wherein, when the support device (430) is in its removed state (in which the support device (430) is physically separated from the housing (6), it is in its locked state, in which the locking element (402) blocks the extension of the rail system (34, 434) by forming a positive locking action, and wherein, when the support device (5) is in its installed state, the locking unit (400) is in its free state, in which the locking element (402) releases the extension of the rail system (34, 434). In order to provide a household or commercial appliance whose operational reliability is improved compared to the prior art, the locking element (402) is, according to the invention, biased against the force of a spring (422) at least in the free state of the locking unit (400).