Drawer Rail Bracket and Retainer for Smooth, Secure Extension
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Solution Overview
Problem
Existing drawer rail systems for home appliances, such as dishwashers, face issues with sub-rail separation, difficulty in engaging/disengaging the drawer rail from the appliance, and noise due to gaps between components, especially when handling heavy loads and long movement distances.
Innovation Solution
A drawer rail system with a first rail mounted to the storage chamber, a second rail coupled to the item accommodation unit, and a third rail between them, featuring stoppers and retainers to prevent sub-rail separation and noise, and a rail bracket for secure mounting and easy engagement/disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sufficient gaps are designed between rails to allow relative movement, then the drawer rail can move smoothly, but the rails may separate from one another when heavy force is applied or after repeated use
Solution Approach 1:
A retainer is introduced as an intermediary component between the first rail and the third rail. The retainer includes retention protrusions that engage with retention grooves on the rails, preventing lateral separation while still allowing the necessary relative movement for smooth operation. This mediator maintains the connection between rails throughout the movement cycle.
Solution Approach 2:
The system transitions from a static rigid connection to a dynamic articulated connection. The retainer allows the rails to move relative to each other during operation while maintaining connection. The gap between rails is controlled to be sufficient for movement but limited by the retainer to prevent excessive separation.
2Length of moving object
If the drawer rail is designed for long movement distance and heavy load support, then the basket can be drawn far out, but the structure becomes more complex and requires multiple rails
Solution Approach 1:
The drawer rail system is segmented into multiple functional components: a first rail mounted to the tub, a second rail coupled to the basket, and a third rail positioned between them. Each rail serves a specific function in enabling the extended movement distance while supporting heavy loads. The segmentation allows the system to achieve long travel distance without requiring a single overly complex structure.
3Length of moving object
If stoppers are positioned at the distal ends of rails to maximize movement distance, then the basket can travel far, but the gap between rails increases beyond allowable range
Solution Approach 1:
The retainer acts as a mediator that controls the gap between the first rail and the third rail. It includes retention protrusions that engage with retention grooves on both rails, maintaining a stable relationship between them. This prevents the gap from increasing beyond allowable ranges while still permitting the full movement distance needed for basket extraction.
4Ease of manufacture
If the drawer rail components are designed to be easily mounted and dismounted, then installation and maintenance become simpler, but the mounting structure may become less secure
Solution Approach 1:
The drawer rail system is divided into separable modules: the first rail assembly (including retainer and third rail) can be mounted as a unit to the tub, and the second rail with the basket can be coupled and decoupled independently. This segmentation enables easy installation and maintenance while maintaining secure mounting through proper engagement features like retention grooves and protrusions.
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 system enhances reliability by preventing sub-rail separation, facilitates easy engagement/disengagement, and reduces noise, ensuring stable and secure operation even with heavy loads and long movement distances.
Implementation Method 1
The inner rail slides relative to the outer rails using ball bearings, which are provided in a retainer.
Data Source
AI summary
A drawer rail and a home appliance including the same are disclosed. The home appliance includes a drawer rail configured to withdraw an item accommodation unit provided in a storage chamber and a rail bracket configured to mount the drawer rail to the storage chamber. The rail bracket includes a body configured to be mounted to the storage chamber, and bracket hooks provided at openings formed in a front portion and a rear portion of the body. The drawer rail includes rail holes into which the bracket hooks are respectively inserted.