Hearing Instrument Filter Insert Elastic Retention
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Solution Overview
Problem
Hearing instruments face challenges with ear wax, sweat, and dander ingressions into sound exits, requiring frequent filter replacements, which are difficult for users with reduced dexterity and costly, and existing solutions distort sound flow and pose risk of filter loss.
Innovation Solution
A hearing instrument with a filter insert held by an elastic element, such as a tension spring or cord, that can be easily pulled away for cleaning and secured with security threads to prevent loss, featuring a series of concentric discs with non-overlapping holes for sound passage and a repellent coating for easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filter is used to prevent ear wax and particle ingressions, then protection against harmful factors is improved, but the filter requires frequent replacement which increases device complexity and user difficulty
Solution Approach 1:
The filter insert is designed to be self-cleaning through irrigation fluid flow that washes accumulated ear wax and particles off the filter surface during normal device operation, eliminating the need for frequent manual replacements while maintaining protection against harmful factors
Solution Approach 2:
The filter system is segmented into a removable filter insert that can be easily extracted from the housing for cleaning or replacement, separating the maintenance function from the main device structure to simplify user interaction
2Volume of moving object
If filters are made small to fit in hearing instruments, then device compactness is improved, but handling difficulty increases for users with reduced dexterity
Solution Approach 1:
The filter is segmented as a separate, easily removable insert with a standardized extraction mechanism that allows users to handle and replace it without requiring fine motor skills to manipulate tiny components within the compact device
Solution Approach 2:
A retrieval tool or simplified extraction mechanism serves as an intermediary between the user's hand and the small filter insert, making handling easier for users with reduced dexterity while maintaining the compact filter size needed for the hearing instrument
3Object-affected harmful factors
If a cap is used to lead sound around for wax protection, then protection against harmful factors is improved, but sound flow distortion increases
Solution Approach 1:
The filter insert uses porous material that allows sound waves to pass through while blocking ear wax and particles, eliminating the need for sound-redistributing caps that cause distortion while maintaining effective protection
4Reliability
If filters are attached securely to prevent loss, then reliability is improved, but ease of removal for cleaning decreases
Solution Approach 1:
The filter retention mechanism uses dynamic elements such as elastic arms or snap-fit connections that provide strong holding force during normal use but allow easy release through a simple user action, balancing reliability with ease of removal for cleaning
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 effectively prevents ingressions, simplifies filter cleaning and replacement, reduces costs, and enhances user safety by preventing filter loss, while maintaining clear sound flow.
Implementation Method 1
a filter insert (9) arranged to cover a sound outlet opening of the sound tube (3) and held against the sound outlet opening by at least one elastic element (13) attached to the shell (2)
Implementation Method 2
The elastic element is a tension spring or an elastic cord
Data Source
Figure 1~2
AI summary
The invention relates to a hearing instrument (1), comprising a shell (2) configured to be at least partially inserted into a human ear canal, and a sound tube (3) arranged in the shell (2), configured to guide sound emitted by a receiver (4) or loudspeaker, wherein a filter insert (9) is arranged to cover a sound outlet opening of the sound tube (3) and is held against the sound outlet opening by at least one elastic element attached to the shell (2) allowing the filter insert (9) to be pulled away from the shell (2) against a retraction force of the elastic element..