Bone Conduction Earphone Rib Reinforcement to Reduce Sound Leakage
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Solution Overview
Problem
Existing bone conduction earphones suffer from sound leakage and insufficient structural rigidity, leading to discomfort and reduced sound quality.
Innovation Solution
The earphone fixing portion is reinforced with a grid pattern of reinforcing ribs, and the core housing is designed with a higher elastic modulus than the ear hook housing, enhancing structural rigidity and resonant frequency to minimize sound leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the earphone fixing portion is made with sufficient rigidity, then sound leakage is reduced, but the structural complexity increases
Solution Approach 1:
The earphone fixing portion is divided into multiple functional zones through the reinforcing rib structure. The reinforcing ribs segment the housing into rigid support regions and flexible comfort regions, allowing each segment to perform its specific function independently - the ribs provide rigidity to reduce sound leakage while the spaces between them maintain flexibility for comfort.
Solution Approach 2:
The reinforcing ribs are strategically positioned at specific locations where rigidity is most needed to prevent sound leakage, rather than making the entire housing uniformly rigid. This local reinforcement approach provides the necessary structural integrity at critical areas while maintaining overall structural simplicity and manufacturing ease.
2Object-generated harmful factors
If the elastic modulus of the core housing is increased, then resonant frequency increases and sound leakage reduces, but the material selection and manufacturing complexity increase
Solution Approach 1:
The patent modifies the elastic modulus parameter of the core housing material to be higher than that of the ear hook housing material. This parameter change directly increases the resonant frequency of the core housing, which in turn reduces sound leakage. The specific material selection with controlled elastic modulus values is optimized to balance performance requirements with manufacturing feasibility.
3Strength
If reinforcing structures are added to the earphone fixing portion, then structural rigidity increases, but the device complexity increases
Solution Approach 1:
The reinforcing ribs are integrated directly into the earphone fixing portion housing structure, merging the reinforcing function with the existing housing components. This integration approach provides the necessary structural rigidity without adding separate, independent reinforcing parts, thereby minimizing the increase in device complexity while achieving the desired strength enhancement.
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 reinforcement increases the resonant frequency of the core housing, reducing sound leakage and improving wearing comfort by maintaining structural integrity and sound quality.
Implementation Method 1
Bone conduction is a sound conduction manner. That is, electrical signals are converted into mechanical vibrations. The mechanical vibrations are transmitted through the skull, the bony labyrinth, the endolymph, the spiral organ, the cochlear nerve, the auditory pathway in the cerebral cortex of a human, etc.
Data Source
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AI summary
The present disclosure relates to a bone conduction earphone. The bone conduction earphone may include an ear hook assembly and a core module. The ear hook assembly may include an ear hook housing. The core module may be disposed on one end of the ear hook assembly. The core module may include a core housing and a core. An opening may be disposed on one end of the core housing to form a chamber structure for accommodating the core. An elastic modulus of the core housing may be greater than an elastic modulus of the ear hook housing.