Elastomeric Light Pipe Ingress Resistance
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Solution Overview
Problem
Conventional ear-level electronic devices, such as hearing aids, struggle to communicate device status effectively to the wearer or caregivers, particularly during fitting or in situations where access to a mobile device is limited.
Innovation Solution
An ear-wearable electronic device incorporating a light emitting device optically coupled to an elastomeric light pipe, which provides a visual indication of device status, including programming, Bluetooth pairing, charge status, and malfunctions, while incorporating ingress resistance features to prevent fluid ingress through the housing aperture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If an aperture is provided in the housing wall to allow light transmission for device status communication, then visual communication capability is improved, but fluid ingress resistance deteriorates
Solution Approach 1:
An elastomeric light pipe serves as an intermediary component that transmits light from the light emitting device through the housing wall aperture while simultaneously acting as a barrier to fluid ingress. The light pipe includes a retention feature that interfaces with the housing wall, creating a sealed path that allows optical transmission but prevents fluid penetration into the housing interior.
2Loss of information
If a light emitting device is added to communicate device status, then information communication is improved, but device complexity increases
Solution Approach 1:
The elastomeric light pipe performs multiple functions simultaneously: it transmits light for device status communication, provides structural support as a retention feature, and acts as a fluid barrier seal. By combining these functions into a single component, the design avoids adding separate elements for each function, thereby limiting the increase in device complexity.
3Object-affected harmful factors
If an elastomeric light pipe with retention feature is used to prevent fluid ingress, then fluid protection is improved, but manufacturing complexity increases
Solution Approach 1:
The retention feature is merged with the light pipe as an integrated component rather than a separate element. This integration allows the light pipe to be installed as a single unit through the aperture, simplifying the assembly process. The retention feature interfaces directly with the housing wall structure, eliminating the need for additional sealing components or complex assembly steps.
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 enables clear visual communication of device status to the wearer, enhancing usability and fitting processes, while the elastomeric light pipe's ingress resistance features protect the device from fluid exposure.
Implementation Method 1
An elastomeric light pipe is disposed within the aperture of the housing wall and arranged to receive light from the light emitting device
Implementation Method 2
An interface between a section of the housing wall comprising the aperture and the elastomeric light pipe defines a convoluted path for impeding passage of fluid between the outer and inner surfaces of the housing wall
Data Source
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Figure 3
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AI summary
An ear-wearable electronic device comprises a housing having a housing wall. The housing wall comprises an outer surface, an inner surface, and an aperture extending between the outer and inner surfaces. A light emitting device is disposed in the housing. An elastomeric light pipe is disposed within the aperture and arranged to receive light from the light emitting device. An interface between a section of the housing wall comprising the aperture and the elastomeric light pipe defines a convoluted path for impeding passage of fluid between the outer and inner surfaces of the housing wall.