Uni-body Top Case Structural Support for Laptop Warping
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Solution Overview
Problem
Portable computing devices face challenges in designing outer enclosures that are both lightweight and durable, while also being aesthetically pleasing, as lighter enclosures tend to be flexible and prone to damage, and stronger enclosures are heavier and less portable.
Innovation Solution
A multi-part housing system for portable computing devices, featuring a top case and bottom case joined with a clutch assembly, made from strong and resilient materials like aluminum, with an integrated support system that provides structural integrity and acts as an EMI shield, and a uni-body top case with a keyboard support rib to prevent light leakage and electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the outer enclosure is made lighter and thinner, then portability is improved, but structural rigidity deteriorates causing the enclosure to buckle and bow
Solution Approach 1:
The enclosure is divided into multiple segments including a unibody top case, a bottom case, and an integrated support system with multiple ribs and structural elements. This segmentation allows each part to be optimized independently - the unibody top case provides overall structural integrity while the integrated support ribs provide localized reinforcement, enabling the enclosure to be lighter overall while maintaining rigidity where needed.
Solution Approach 2:
The enclosure utilizes composite construction combining aluminum unibody top case with plastic bottom case and integrated support structures. This composite approach allows leveraging the high strength-to-weight ratio of aluminum for the top case while using lighter materials for other components, achieving reduced overall weight while maintaining structural rigidity through the combined system.
2Strength
If the outer enclosure is made stronger and more rigid, then durability is improved, but weight increases reducing portability
Solution Approach 1:
The enclosure applies local quality by concentrating structural reinforcement only where needed through the integrated support system. The unibody top case provides inherent strength, and additional support ribs are strategically positioned to reinforce specific areas subject to stress, rather than uniformly thickening the entire enclosure. This allows achieving necessary strength while minimizing overall material usage and weight.
3Strength
If the enclosure thickness is increased, then structural rigidity is improved, but aesthetic appeal deteriorates due to increased size
Solution Approach 1:
The enclosure structure is segmented into a thin unibody top case and a separate bottom case connected by integrated support elements. This segmentation allows the top case to maintain a thin, aesthetically pleasing profile while the support ribs and bottom case provide the necessary structural rigidity, preventing the need to uniformly increase the thickness of the entire enclosure.
4Object-affected harmful factors
If metal enclosure materials are used, then EMI shielding is improved, but manufacturing complexity increases due to surface treatment requirements
Solution Approach 1:
The unibody top case serves multiple functions simultaneously: it provides the outer enclosure structure, acts as an EMI shield through its aluminum construction, and serves as a mounting surface for internal components. The integrated support system is also multi-functional, providing structural reinforcement, component mounting points, and EMI shielding continuity. This multi-functionality reduces the need for separate EMI shielding components and simplifies manufacturing.
Data Source
AI summary
The present application describes various embodiments regarding systems and methods for providing a lightweight and durable portable computing device having a thin profile. The portable computing device can take the form of a laptop computer. The laptop computer can include a uni-body top case having an integrated support system formed therein, the integrated support system providing structural support that distributes applied loads through the top case preventing warping and bowing.