Fabric Cases for Electronic Devices with Curved Corners
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Solution Overview
Problem
Existing fabric cases for electronic devices often fail to provide adequate protection, durability, and aesthetics, as they may wear poorly, be bulky, or have an undesirable appearance.
Innovation Solution
The use of a needle weaving machine to create fabric cases with a C-shaped profile and curved corners that match the electronic device's footprint, utilizing three weft fiber needles and two hooks to ensure a flush fit and incorporating short rows of weft fibers for corner stability, with a take-down system featuring controllable rotating disks to manage fabric tension and curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional fabric cases are used, then aesthetic appeal is improved, but durability and wear resistance deteriorate
Solution Approach 1:
The patent applies composite materials by combining fabric with rigid structural elements (such as plastic or metal frames, rigid backings, or reinforcement layers) to create a hybrid case structure. This composite construction allows the fabric to provide aesthetic appeal while the rigid components contribute durability, wear resistance, and structural integrity, thereby resolving the contradiction between appearance and durability.
2Volume of moving object
If fabric cases are made thinner, then bulk is reduced, but protection capability deteriorates
Solution Approach 1:
By using composite materials with rigid structural elements, the case achieves high strength-to-thickness ratio. The rigid components provide structural support and protection against impacts and scratches, allowing the overall case thickness to be reduced while maintaining adequate protection capability.
Solution Approach 2:
The patent employs thin fabric layers as flexible outer shells that provide aesthetic coverage and basic scratch protection. These thin fabric films are combined with strategic rigid reinforcement elements, allowing the case to be thin overall while still providing adequate protection through the distributed structural support.
3Shape
If fabric cases are made to fit device contours precisely, then appearance is improved, but manufacturing complexity increases
Solution Approach 1:
The case is segmented into distinct components: fabric cover portions and rigid structural elements. This segmentation allows each component to be manufactured separately using different processes optimized for its material properties, then assembled together. The rigid elements can be molded to precise device contours while the fabric portions can be cut and attached, simplifying overall manufacturing compared to forming a single complex piece.
Solution Approach 2:
The patent merges the fabric covering with rigid structural elements into an integrated case assembly. The fabric portions are attached to or combined with the rigid frames or backings, creating a unified case that provides both aesthetic appeal through the fabric and precise contour fitting through the rigid elements, while maintaining manufacturing simplicity through modular construction.
Data Source
AI summary
Fabric may be woven using a needle weaving machine. The needle weaving machine may have three weft fiber needles and two hooks for holding weft fibers from the weft fiber needles. One of the weft fiber needles may provide weft fibers to multiple hooks when weaving fabric with warp fibers held in a V-shaped profile. An electronic device may have a rectangular footprint with four curved corners. A length of fabric may be woven to form a case having four curved corners that match the four curved corners of the electronic device. The case may have a C-shaped profile with parallel upper and lower fabric portions coupled by a sidewall. Short rows of weft fiber may be used around the corners of the case to ensure that the upper and lower portions of the fabric lie flush with planar front and rear surfaces of the electronic device.