Headphone Cover Core Stability and Fabric Durability
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Solution Overview
Problem
Existing headphone covers face issues with fabric degradation due to friction and easy displacement or detachment from the headphone, as they need to allow sound passage and cannot be thick enough to maintain stability.
Innovation Solution
A headphone cover with a foldable fabric and a core around the sound passage opening, where the core has a compressive yield stress of 0.0587 MPa or more to prevent displacement and detachment, and flat rubber on the other side to resist friction and maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the headphone cover is formed of thin fabric to allow sound passage, then sound transmission is improved, but the fabric is easily torn due to friction
Solution Approach 1:
The headphone cover uses different materials for different regions: thin fabric in the sound passage area for sound transmission, and flat rubber at the opening for friction resistance and durability. This local differentiation resolves the contradiction between sound transmission and fabric durability.
2Strength
If the headphone cover is formed of thick fabric to prevent tearing, then fabric durability is improved, but sound passage is blocked
Solution Approach 1:
The thin fabric is used specifically in the sound passage region where sound transmission is critical, while thick flat rubber is used at the opening where mechanical durability is critical. This spatial differentiation of material properties resolves the contradiction.
3Use of energy by moving object
If a sound passage opening is formed in the central portion of the headphone cover, then sound transmission is improved, but the headphone cover is easily displaced or detached
Solution Approach 1:
The headphone cover combines fabric and flat rubber in a composite structure. The flat rubber component provides the stability and friction resistance needed to prevent displacement, while the fabric portion with opening allows sound passage. This composite approach resolves the contradiction between sound transmission and stability.
4Stability of the object's composition
If the core has high compressive yield stress to prevent displacement, then headphone cover stability is improved, but the core becomes difficult to deform for mounting
Solution Approach 1:
The core's mechanical properties are precisely controlled with compressive yield stress of 0.0587 MPa or more, which is sufficiently high to prevent displacement during use but low enough to allow deformation during mounting. This parameter optimization resolves the contradiction between stability and ease of operation.
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 solution ensures the headphone cover remains stably mounted on the ear pad without blocking sound, with the core's deformability allowing easy mounting and the flat rubber preventing fabric tears, thus maintaining fabric coverage and preventing detachment.
Implementation Method 1
A compressive yield force in an extending direction of the core is equal to or greater than 0.0587 Mpa. The core is deformed when bending stress in a direction perpendicular to the extending direction is equal to or smaller than 0.057 Mpa.
Implementation Method 2
the flat rubber prevents the other side of the fabric from being torn, due to its resistance to friction and keeps the headphone cover stably mounted on the headphone
Data Source
AI summary
[Problem] To provide a headphone cover that does not block a sound from a headphone and is able to keep its fabric stably covering the headphone.[Solving Means] A headphone cover 1 includes fabric 14 that has an opening in a position corresponding to the sound passage position on one side of an ear pad and is foldable at least from the one side toward another side of the ear pad by 90° and a core 16 disposed around the opening. The compressive yield force in the extending direction of the core 16 is equal to or greater than 0.0587 Mpa.