Phone Case Hard Frame Rib Reinforcement

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Solution Overview

Problem

Existing mobile phone cases with soft protective covers and hard frames are vulnerable to damage, particularly at connector, speaker, and earphone holes, due to thin manufacturing and lack of structural reinforcement, leading to potential breakage and user discomfort from prolonged use.

Innovation Solution

A mobile phone case design featuring a soft protective cover with a hard protective frame that includes mating means such as protrusions and recesses for secure coupling, a rib for structural reinforcement, and a design that prevents the hard frame from being easily dislodged, using materials like thermoplastic polyurethane for the soft cover and polycarbonate for the hard frame.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the hard protective frame has holes for connector, speaker, earphone or other buttons, then the device functionality is enabled, but the portions for such holes become thinner and more susceptible to damages or breakage

Engineering Contradiction:
Improvedevice functionalityVSAvoidframe strength at hole portions
Core Design Contradiction:
Adaptability or versatilityVSStrength

Solution Approach 1:

The patent applies local quality by providing structural reinforcement specifically at the hole portions of the hard protective frame where connectors, speakers, and buttons are located. These reinforced portions have increased thickness and structural support compared to other areas, making them more resistant to damage while maintaining the necessary openings for device functionality.

Inventive Principle:
Principle #3Local quality

2Adaptability or versatility

If the bottom side portion has several holes for charging cable, speaker, or earphone, then the device connectivity is enabled, but the bottom side portion becomes especially more vulnerable to damage or breakage

Engineering Contradiction:
Improvedevice connectivityVSAvoidbottom side portion strength
Core Design Contradiction:
Adaptability or versatilityVSStrength

Solution Approach 1:

The patent applies local quality by providing structural reinforcement specifically at the bottom side portion of the hard protective frame where multiple holes for charging cable, speaker, and earphone are located. This reinforced bottom portion has increased thickness and structural support, making it particularly resistant to damage while maintaining necessary connectivity openings.

Inventive Principle:
Principle #3Local quality

3Stability of the object's composition

If the hard protective frame is securely received in between the two ledges, then the frame stability is improved, but the assembly complexity increases

Engineering Contradiction:
Improveframe stabilityVSAvoidassembly complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the hard protective frame into modular components that can be separately assembled. The frame includes a back plate with ledges and side pieces that can be attached to the soft protective cover independently. This modular design maintains stability through precise ledge engagement while simplifying the overall assembly process compared to a monolithic structure.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS10917131B2Case, having soft protective cover and hard protective frame, for electronic devices
Publication Date: 2021.02.09 SPIGEN KOREA
  • US10917131B2 patent drawing
  • US10917131B2 patent drawing
  • US10917131B2 patent drawing

AI summary

A case for an electronic device including a soft protective cover having a back panel to cover a back portion of the electronic device, side walls extending from the back panel to cover side portions of the electronic device, and an upper ledge; and a hard protective frame having a disconnected side and two facing sides. The disconnected side includes a first end portion and a second end portion. Each of the first and second end portions includes a first side and a second side; the second side tapers towards the upper ledge.