Side-Mounted Ear Wax Filter for Hearing Aid Speaker Snout
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Solution Overview
Problem
Existing hearing aids with ear wax filters face challenges in maintaining acoustical performance due to wax buildup, requiring difficult filter changes and being sensitive to tolerances, especially in receiver-in-the-ear (RITE) and behind-the-ear (BTE) models.
Innovation Solution
A hearing aid design featuring a side-mounted ear wax filter with a slidably arranged sound canal and fixation structures for easy attachment and removal, allowing for increased filter size and reduced sensitivity to tolerances, facilitating user-friendly replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ear wax filter is mounted on the tip using a tool, then the filter can be attached to the hearing aid, but the hearing aid needs to clamp harder on the filter than the tool, making it difficult for users to change the filter themselves
Solution Approach 1:
Instead of mounting the filter from the tip end where the hearing aid must clamp harder than the tool, the filter is mounted from the side opening of the speaker snout. This inversion of the mounting direction allows the hearing aid to securely hold the filter while enabling users to easily insert and remove it from the side without requiring excessive clamping force.
Solution Approach 2:
A fixation structure acts as an intermediary mechanism between the hearing aid and the ear wax filter. This fixation structure provides a reliable attachment point that the hearing aid can clamp onto securely, while also allowing users to easily engage and disengage the filter without requiring the hearing aid to exert excessive clamping force.
2Ease of operation
If the ear wax filter size is increased to make it easier to see and handle, then user handling improves, but the filter may become more difficult to secure in the small speaker snout
Solution Approach 1:
The filter mounting is moved from the longitudinal axis (tip) to the lateral dimension (side opening). This dimensional change allows the filter to be accessed from the side, providing better leverage and grip for users while maintaining secure retention through the fixation structure that engages with the speaker snout's internal geometry.
Solution Approach 2:
The fixation structure is designed with specific local features that provide secure engagement points within the speaker snout. These localized engagement features ensure that even larger filters can be reliably retained by engaging with specific geometric features of the speaker snout rather than relying solely on overall size constraints.
3Reliability
If the hearing aid clamps harder on the filter than the tool, then the filter remains securely attached, but users experience difficulty changing the filter themselves over time
Solution Approach 1:
The mounting approach is inverted from tip-mounted to side-mounted. This allows users to access the filter from the side opening where they can apply their own insertion force directly, rather than requiring the hearing aid to clamp harder than the tool used during manufacturing. The side mounting provides natural user leverage for easy replacement.
Solution Approach 2:
The side-mounted filter with fixation structure enables self-service filter replacement. Users can directly insert and remove the filter from the side opening without requiring the hearing aid's clamping mechanism to hold the filter during user manipulation. The fixation structure provides secure retention during normal use while allowing easy user-accessible removal.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A hearing aid comprising a speaker unit, a speaker snout comprising: a sound canal having a longitudinal axis, a lateral axis, a sound canal opening, an earpiece configured to be attached to the speaker snout and an ear wax filter comprising: a cylindrical body portion a first annular flange extending perpendicular to the longitudinal axis, a second annular flange spaced from the first annular flange and extending perpendicular to the longitudinal axis, wherein the flanges enable engagement with an external tool for replacing the ear wax filer, said sound canal being configured to guide sound generated by the speaker unit through the sound canal into the earpiece, wherein the ear wax filter is arranged in the speaker snout and wherein the flanges enable engagement with an external tool for replacing the ear wax filter.