Cerumen Barrier Filter for Hearing Device Sound Conduit
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Solution Overview
Problem
Existing cerumen barriers for hearing devices have limitations, such as low cerumen capacity, difficulty in removal, and potential for damaging the sound conduit, especially when designed for short acoustic conduits, and often require frequent replacement due to limited cerumen accumulation before acoustic performance is affected.
Innovation Solution
A cerumen barrier/filter configured to fit inside the sound conduit with a ring structure that provides a high cerumen capacity by utilizing the internal volume, featuring a hub and spokes to allow sound transmission while blocking cerumen, and an engagement mechanism for easy insertion and removal with a manipulation tool, allowing for increased replacement intervals and reduced maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a cerumen barrier is designed with a threaded connector screwed onto the end of the acoustic conduit, then the barrier can be securely attached, but it is not compatible with short acoustic conduits and cannot utilize the internal volume of the conduit
Solution Approach 1:
The invention transitions from attaching the cerumen barrier at the end of the acoustic conduit (external attachment) to inserting the barrier inside the conduit (internal placement). This dimensional change allows the barrier to utilize the internal volume of the conduit for cerumen accumulation while remaining compatible with short conduits, as the barrier becomes part of the conduit's internal structure rather than an external add-on.
Solution Approach 2:
The cerumen barrier is nested within the acoustic conduit, with the barrier's outer diameter designed to fit inside the conduit's inner diameter. This nesting arrangement allows the barrier to occupy and utilize the internal volume of the conduit for cerumen storage while maintaining compatibility with the conduit's dimensions, including short conduits.
2Volume of moving object
If a cerumen barrier is inserted deep into the sound conduit to maximize cerumen capacity, then the cerumen accumulation volume increases, but the barrier becomes difficult to remove and may damage the sound conduit
Solution Approach 1:
The cerumen barrier is segmented into two functional parts: a filter portion that blocks cerumen and a hub portion that extends toward the sound opening. The hub serves as a manipulation interface that can be engaged by tools for insertion and removal, while the filter portion remains positioned deep in the conduit to maximize cerumen capacity. This segmentation allows deep placement for capacity while maintaining ease of manipulation for removal.
Solution Approach 2:
A manipulation tool acts as an intermediary between the user and the cerumen barrier. The tool engages with the hub's external features (such as protrusions or grooves) to provide leverage for insertion and removal, allowing the barrier to be positioned deep in the conduit for maximum capacity while being easily removable through the intermediary tool without direct manual manipulation that could damage the conduit.
3Reliability
If the cerumen barrier uses a complex engagement mechanism for secure attachment, then the barrier remains stable during use, but the device complexity increases
Solution Approach 1:
The engagement mechanism is segmented into simple external features on the hub (such as protrusions, grooves, or ridges) that interface with corresponding features in the sound conduit. This segmentation creates a secure attachment system that relies on simple geometric interlocking rather than complex mechanical components, maintaining stability during use while minimizing device complexity.
Solution Approach 2:
The hub features localized engagement features at specific positions (such as circumferential protrusions or grooves) that provide secure attachment without requiring complex mechanisms throughout the entire barrier structure. This local quality approach ensures stability at the critical engagement points while keeping the overall device simple and manufacturable.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A cerumen protection plug (20) for a hearing device (5). The cerumen protection plug (20) prevents cerumen from passing along a sound conduit (17) in the hearing device (5) and blocking sound output from a receiver (10) in the hearing device (5). The cerumen protection plug (20) includes a circular plug (24) containing a cerumen barrier (21). A positioning handle (23) extends from a hub of the circular plug (24). The positioning handle (23) allows the cerumen barrier (21) to be positioned along the sound conduit (17), where it prevents cerumen that has entered the sound conduit (17) from traveling along the sound conduit (17) to the receiver (10) or an output port (12) of the receiver (10).