Eartip Foreign Matter Inflow Prevention Structure
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Solution Overview
Problem
Portable acoustic devices, such as earbuds, face sound performance deterioration due to foreign matter like liquid earwax clogging the mesh portions of the nozzle, reducing the sound transmission area and affecting sound quality.
Innovation Solution
An eartip design featuring a foreign matter inflow prevention portion with a protrusion and stepped structure around an acoustic hole, which directs liquid foreign matter to an observable upper groove rather than the sound transmission area, preventing clogging and maintaining sound performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mesh portion is provided at the end of the nozzle for sound transmission, then sound quality is improved, but foreign matter (liquid earwax) can attach to and clog the mesh, reducing sound transmission area and deteriorating sound performance
Solution Approach 1:
The eartip is divided into multiple functional areas: a first area for sound transmission through the mesh, a second area surrounding the nozzle, and a foreign matter inflow prevention portion with grooves. This segmentation allows each area to perform its specific function - the mesh area transmits sound while the grooved area collects and channels foreign matter away from the mesh, preventing clogging while maintaining sound quality
Solution Approach 2:
The foreign matter inflow prevention portion acts as an intermediary structure between the external environment and the mesh portion. The grooves in this intermediate structure collect liquid foreign matter and guide it toward the outer periphery, preventing direct contact with the mesh and thus protecting the sound transmission path while maintaining the mesh's acoustic function
2Device complexity
If the eartip structure is simplified without the foreign matter prevention structure, then device complexity is reduced, but liquid foreign matter can reach the mesh portion and cause clogging
Solution Approach 1:
The eartip is constructed as a flexible elastic structure that can be molded as a single piece. The foreign matter inflow prevention portion is formed as an integrated thin structure with grooves that guide liquid foreign matter away from the mesh. This approach adds minimal structural complexity while effectively preventing clogging, as the entire eartip including the prevention structure can be manufactured as one flexible component
3Manufacturing precision
If liquid foreign matter accumulates on the mesh portion, then sound transmission area is reduced, but the accumulated foreign matter is difficult to observe and remove
Solution Approach 1:
The design extracts foreign matter collection function from the sound transmission function by providing a separate foreign matter inflow prevention portion with grooves. Liquid foreign matter is channeled to the outer periphery of the eartip where it accumulates in observable locations away from the mesh, allowing users to easily see and remove accumulated foreign matter without affecting sound transmission
Solution Approach 2:
The eartip is made of transparent or translucent elastic material, allowing users to visually observe the accumulation of liquid foreign matter in the grooves and on the outer surface. This transparency enables users to detect when foreign matter needs to be removed, maintaining ease of operation while preserving sound transmission area
Data Source
AI summary
An electronic device according to various embodiments includes a housing including an acoustic channel and a nozzle portion having an opening formed therein for connecting the acoustic channel to an outside of the electronic device, and an eartip detachably engaged with the housing through at least a portion of the nozzle portion. The eartip includes a first area, at least a portion of which is formed of an elastic material and comes into contact with an object, and a second area, at least a portion of which is formed of an elastic material and surrounds at least a portion of the nozzle portion. The second area includes a first portion having a hole having a first size and a second portion having a second size larger than the first size, and a protrusion is formed at an end of the second portion in a first direction.