Dual-Layer Polymer Laptop Case Clips for Impact Protection
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Solution Overview
Problem
Traditional laptop cases with thicker outer shells provide better impact protection, but the design is not optimized for modern laptops with tight manufacturing tolerances, limiting the effectiveness of impact dissipation and grip, especially around the periphery where clips are crucial.
Innovation Solution
The case features clips made of a softer material, which are offset and extend around a significant portion of the perimeter, with a thicker harder polymer layer providing enhanced impact protection by minimizing direct contact with the laptop casing and incorporating resilient feet and inwardly extending ribs for improved absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If clips are made of harder polycarbonate material, then snap fit grip strength is improved, but direct contact with laptop casing increases causing reduced impact protection
Solution Approach 1:
The patent introduces an intermediary softer polymer layer between the harder polycarbonate clips and the laptop casing. This softer material acts as a mediator that maintains the structural integrity and snap fit capability of the clips while providing a cushioning interface that reduces direct impact transmission to the laptop, thereby resolving the contradiction between grip strength and impact protection.
Solution Approach 2:
The case employs a composite structure where clips are constructed from multiple materials with different properties - a harder polycarbonate outer layer for structural strength and snap fit capability, combined with a softer polymer inner layer for impact absorption. This composite material approach allows the clips to simultaneously achieve both strong grip and enhanced impact protection.
2Object-affected harmful factors
If outer shell thickness is increased, then impact dissipation is improved, but manufacturing precision requirements increase due to tight laptop tolerances
Solution Approach 1:
The patent changes the material parameters of the clips by using softer polymer material instead of hard polycarbonate. This parameter change allows the clips to be more compliant and adaptable to manufacturing tolerances variations, enabling adequate grip performance without requiring the increased manufacturing precision that would be needed if thicker hard material were used throughout.
Solution Approach 2:
The case design applies different material qualities to different regions - the clips use softer material for compliance and tolerance accommodation, while the main body retains harder material for impact protection. This local differentiation of material properties allows the case to achieve both impact dissipation and tolerance compatibility without uniformly increasing thickness everywhere.
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
This design significantly enhances impact protection and grip, particularly in vulnerable regions like corners, by distributing the harder polymer's dissipation area wider and using softer materials for better absorption, while maintaining a secure snap fit mechanism.
Implementation Method 1
the softer polymer absorbs a further portion
Implementation Method 2
the harder material dissipates a significant portion of the impact
Data Source
AI summary
A case for a laptop computer, the case comprising upper and lower shells which are entirely separate from one another. Each shell comprises an outer layer of a first injection moulded polymer and an inner liner of a second injection moulded polymer softer than the first. Each shell defines a cavity having a back surface and upstanding side walls, the cavity being arranged to receive, in use, one half of the laptop computer. The second polymer comprises a plurality of inwardly extending clips which protrude across the cavity from an edge of the side wall furthest from the back surface to, in use, retain the shell on the laptop half.