Integral Drawer Centering Bezel for Smooth, Rattle-Free Sliding
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Solution Overview
Problem
Molded plastic drawer assemblies experience manufacturing tolerances issues leading to vibration and rattling due to excessive clearance, which are mitigated by using metal parts but increase costs and complexity.
Innovation Solution
A plastic drawer assembly with an integral bezel centering device featuring resilient cams on cantilevered support lugs, providing an interference fit to align and center the drawer for smooth sliding, eliminating the need for metal parts and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If molded plastic drawer assemblies are used, then manufacturing costs are reduced, but manufacturing precision deteriorates leading to excessive clearance and vibration
Solution Approach 1:
The centering device is integrated directly into the bezel structure, combining two previously separate components (bezel and centering mechanism) into a single molded plastic piece. This eliminates the need for separate metal centering parts while maintaining precise alignment functionality, thereby reducing manufacturing costs without sacrificing precision.
Solution Approach 2:
The invention uses resilient cams that can elastically deform to accommodate manufacturing tolerances. The resilience parameter of the plastic material allows the centering device to compensate for dimensional variations, maintaining proper clearance control despite variations in molding precision.
2Manufacturing precision
If metal parts are used to improve manufacturing precision, then clearance tolerance improves, but device complexity increases
Solution Approach 1:
The centering device features are molded directly into the bezel, eliminating the need for separate metal centering components. This integration reduces the total part count and assembly complexity while achieving the same precision function that previously required metal parts.
Solution Approach 2:
The invention replaces expensive metal centering parts with molded plastic features that are cheaper to produce. The plastic bezel with integrated centering cams provides the necessary precision function at lower cost and with simpler manufacturing processes.
3Ease of manufacture
If molded plastic drawer assemblies are used, then manufacturing costs are reduced, but reliability deteriorates due to vibration and rattling
Solution Approach 1:
The centering device is integrated into the bezel to provide continuous contact and alignment between the drawer and bezel. This eliminates excessive clearance that causes vibration and rattling, improving reliability while maintaining the cost benefits of plastic construction.
Solution Approach 2:
The resilient cams are designed with specific elastic properties that allow them to maintain consistent contact pressure with the drawer. This elastic deformation capability ensures stable positioning and reduces vibration by compensating for manufacturing tolerances and operational variations.
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 smooth sliding and reduces vibration, maintaining customer expectations while lowering production costs by integrating the bezel and centering device as a unitary plastic component, using inexpensive materials and minimizing parts.
Implementation Method 1
the integral drawer centering device comprises a plurality of resilient cams projecting from the bezel and engaging the drawer
Implementation Method 2
The drawer has a width W at a line of engagement with the first cam and the second cam. The drawer width W is greater than the distance D between the cams so that an interference fit is provided between the drawer and the first and second cams
Data Source
AI summary
A drawer assembly is provided. That drawer assembly includes a drawer and a bezel. The bezel includes an integral drawer centering device whereby smooth sliding action of the drawer in the bezel is provided. The bezel and the integral drawer centering device are molded as a unitary component.