Earphone Ear Tip Wax Guard Integration
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Solution Overview
Problem
In-ear earphones and hearing aids face issues with ear wax build-up and migration into the device, which can impede sound performance and interfere with electronics, especially when worn for extended periods.
Innovation Solution
Integration of a wax guard within the ear tip's nozzle extension, featuring a plurality of holes that allow sound passage while preventing ear wax ingress, utilizing a dual-material structure with a harder interior for the wax guard and a softer outer layer, and a gap between the guard and the earphone nozzle to prevent wax contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wax guard is integrated into the ear tip, then ear wax ingress is prevented, but device complexity increases
Solution Approach 1:
The wax guard is merged with the ear tip to form a single integrated component. The wax guard is formed as an integral part of the ear tip's nozzle extension, eliminating the need for separate assembly steps and reducing overall device complexity while maintaining the function of preventing ear wax ingress.
Solution Approach 2:
The ear tip structure is designed to serve multiple functions: it provides acoustic passage, creates acoustic seal, and integrates the wax guard function within its nozzle extension. This multi-functionality reduces the need for additional separate components.
2Reliability
If the wax guard blocks the passageway, then ear wax is inhibited from passing through, but sound transmission may be impeded
Solution Approach 1:
The wax guard incorporates a plurality of small holes (e.g., seven holes with diameter of around 0.031 mm) that are sized and arranged to allow sound waves to pass through while physically blocking larger ear wax particles. This porous structure enables selective transmission based on particle size.
Solution Approach 2:
The wax guard features non-uniform hole distribution with different zones: a first zone with holes of first size and a second zone with holes of second size. This local variation in hole characteristics optimizes sound transmission in different frequency ranges while maintaining wax blocking capability.
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
Effectively prevents ear wax from entering the earphone, ensuring unimpeded sound transmission and extended wear without additional components, allowing for overnight or all-day use without performance degradation.
Implementation Method 1
a wax guard in the nozzle extension, the wax guard blocking the passageway, and a plurality of holes through the wax guard, the holes sized and arranged to allow sound to pass along the passageway, while inhibiting ear wax from passing along the passageway
Implementation Method 2
The ear tip may be composed of two different materials having different hardness, a first, harder material providing the interior mating surface, and a second, softer material providing the outer surface
Data Source
AI summary
An ear tip for an earphone includes an interior mating surface for attaching the ear tip to the earphone, the interior mating surface at least partially surrounding a cavity where the earphone will be located when the ear tip may be so attached, an outer surface including features corresponding to human ear anatomy, a nozzle extension providing a passageway from the interior cavity to space outside the ear tip, a wax guard in the nozzle extension, the wax guard blocking the passageway, and a plurality of holes through the wax guard, the holes sized and arranged to allow sound to pass along the passageway, while inhibiting ear wax from passing along the passageway.