Carbon Fiber Structural Member for Elastic Wearable Frames
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Solution Overview
Problem
Wearable devices such as VR and AR devices require high strength and lightweight structures that can accommodate varying head sizes, but existing materials like plastic are heavy and lack elastic deformation ability, while carbon fiber is brittle and prone to breaking.
Innovation Solution
A carbon fiber structural member with a fixed section and deformable section, using splicing plies where the first carbon fiber ply is aligned along the longitudinal direction and the second ply is perpendicular, enhancing structural strength and elasticity through carbon fiber woven materials and staggered splicing positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If plastic materials are used for temples and frames, then strength requirements are met, but weight increases and elastic deformation ability deteriorates
Solution Approach 1:
The patent uses carbon fiber composite materials to replace traditional plastic materials for temples and frames. Carbon fiber provides high strength-to-weight ratio, achieving both strength requirements and weight reduction. The composite structure includes carbon fiber reinforcement embedded in a matrix material, creating a material that combines the strength of metal with the lightweight properties of polymer.
2Strength
If wall thickness is increased to meet strength requirements, then strength improves, but weight increases and elastic deformation ability deteriorates
Solution Approach 1:
The patent applies different wall thicknesses to different sections of the temple or frame based on local strength requirements. The carbon fiber reinforcement is strategically placed in areas requiring higher strength, while other areas maintain thinner walls to preserve elastic deformation ability. This localized approach allows the structure to meet strength requirements without excessive weight gain.
Solution Approach 2:
The carbon fiber composite material inherently provides high strength properties that allow for thinner wall designs compared to traditional plastics. The composite structure's high strength-to-weight ratio enables the use of reduced wall thickness while maintaining adequate strength, thereby preserving elastic deformation ability.
3Weight of moving object
If carbon fiber is used to achieve lightweight and high strength, then weight reduces and strength improves, but brittleness increases and deformation ability deteriorates
Solution Approach 1:
The patent uses carbon fiber composite materials where carbon fiber provides strength and lightweight properties, while the matrix material (polymer or metal) provides ductility and toughness. This composite structure combines the advantages of both materials, achieving high strength and low weight while maintaining resistance to breaking through the ductile matrix material.
Solution Approach 2:
The patent adjusts the composition ratio and properties of the carbon fiber composite material to optimize the balance between strength, weight, and ductility. By controlling the carbon fiber content, fiber orientation, and matrix material properties, the patent achieves the desired mechanical characteristics that resist breaking while maintaining lightweight properties.
4Strength
If carbon fiber is used to achieve high strength, then strength improves, but elastic deformation ability deteriorates
Solution Approach 1:
The patent applies different carbon fiber orientations and composite material formulations to different sections of the structure. In areas requiring high strength, carbon fiber is aligned to maximize strength properties, while in areas requiring elastic deformation, the material composition and fiber orientation are optimized for flexibility. This local optimization allows simultaneous achievement of high strength and elastic deformation ability.
Solution Approach 2:
The carbon fiber composite material system allows for tailored mechanical properties through variation in carbon fiber content, fiber orientation, and matrix material selection. This compositional flexibility enables the material to provide high strength where needed while maintaining elastic deformation ability in other regions, achieving both requirements through the composite structure.
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
The carbon fiber structural member provides high strength and lightweight properties with improved elastic deformation, protecting electrical components and adapting to different head sizes, enhancing applicability and reliability of wearable devices.
Implementation Method 1
the second carbon fiber ply provided in the deformable section, the carbon fibers of the second carbon fiber ply being perpendicular to the longitudinal direction of the carbon fiber structural member
Data Source
AI summary
A carbon fiber structural member and a wearable device are provided. The carbon fiber structural member includes a fixed section, a deformable section and at least one splicing ply. The splicing ply includes a first carbon fiber ply provided in the fixed section and a second carbon fiber ply provided in the deformable section. The carbon fibers of the second carbon fiber ply are perpendicular to the longitudinal direction of the carbon fiber structural member, and the first carbon fiber ply in at least one of the splicing plies is a carbon fiber woven material or the carbon fibers of the first carbon fiber ply is extended at least along the longitudinal direction of the carbon fiber structural member.