Portable Device Protector Edge Folding and Bonding
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Solution Overview
Problem
Conventional protectors for portable electronic devices suffer from structural weaknesses, such as wrinkling, bending, and splitting due to external forces, and pose a risk of injury from sharp edges, while also being aesthetically unappealing and bulky.
Innovation Solution
The solution involves a design where a first sheet is folded along the edge of a substrate and sandwiched between a second sheet and the substrate, using thermocompression bonding to enhance structural rigidity and eliminate the need for a closed portion, thereby preventing wrinkling and improving durability and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a closed portion is formed by bonding the first sheet and second sheet along the rim of the substrate using ultrasonic welding, then the protector can be assembled and maintained as a unit, but the closed portion becomes wrinkled, bended or split after long-term use due to extrusion and collision
Solution Approach 1:
The patent removes the closed portion structure from the design. Instead of bonding the first and second sheets along the rim to form a closed portion, the sheets are extended to directly cover and protect the substrate edges, eliminating the weak closed portion that prone to wrinkling and splitting.
Solution Approach 2:
The patent transitions from a three-dimensional closed portion structure to a two-dimensional sheet extension structure. The first and second sheets are extended beyond the substrate rim to provide coverage, transforming the protective structure from a bonded closed form to an extended planar form that eliminates the weak bonding joints.
2Strength
If the closed portion is made with harder texture fabric through ultrasonic welding to increase tenacity, then the bonding strength is improved, but the structure becomes thin and sharp causing injury risk to users
Solution Approach 1:
The patent eliminates the closed portion structure that causes injury risk. By removing the bonded edge structure, the thin and sharp harmful elements are extracted from the design, while the protective function is maintained through extended sheet coverage.
Solution Approach 2:
The patent converts the potential harm of sharp bonded edges into benefit by extending the sheets to cover the substrate edges. The extended sheets provide both protection and a safe, non-sharp outer surface that eliminates injury risk while maintaining structural strength.
3Strength
If the first sheet edge portion is folded along the substrate edge and sandwiched between the second sheet and substrate with thermocompression bonding, then structural rigidity is enhanced and wrinkling is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The patent combines the first and second sheets into a unified protective structure where the first sheet edge is folded and bonded to the substrate, then the second sheet is bonded over it. This merging creates an integrated rigid structure that eliminates wrinkling while maintaining manufacturability through coordinated bonding operations.
4Stability of the object's composition
If the closed portion is formed along the rim of the protector, then the substrate is secured between the sheets, but the protector becomes bulky and aesthetically unappealing
Solution Approach 1:
The patent removes the bulky closed portion structure from the design. By eliminating the bonded rim structure, the protector achieves a sleek, flat appearance while maintaining substrate fixation through the extended sheet coverage that secures the substrate edges.
Solution Approach 2:
The patent transitions from a three-dimensional closed portion structure to a two-dimensional extended sheet structure. This dimensional change eliminates the bulky appearance while maintaining the substrate securing function through the extended sheet coverage that lies flat against the substrate.
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 results in a more rigid, compact, and aesthetically pleasing protector that withstands external forces without bending or splitting, maintaining its shape and appearance over long-term use.
Implementation Method 1
a thermocompression bonding is performed to bond the first sheet, the second sheet and the substrate together
Data Source
AI summary
A protector for a portable electronic device is provided. The protector includes a substrate having a first surface, a second surface and an edge; a first sheet disposed on the first surface and having an edge portion; and a second sheet disposed on the second surface, wherein the edge portion of the first sheet is folded along the edge of the substrate, disposed on the second surface, and sandwiched between the second sheet and the substrate.