Dual-Rigidity Eartip Mold for Comfort and Stability
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Solution Overview
Problem
Conventional eartips and mold devices are inflexible and costly, as they are dedicated to producing eartips with specific upper and lower bevel portions of unique rigidity, which affects the comfort and stability of the eartip in the ear canal, leading to potential discomfort and detachment issues.
Innovation Solution
A mold device and method that uses two mold units to form an upper bevel portion with a silicone rigidity of 30±5 and a lower bevel portion with a rigidity of 40±5, incorporating an annular buffer portion to ensure the upper bevel can reach the ear canal deeply while maintaining stability, allowing for flexible production of eartips of different sizes without the need for multiple molds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the upper bevel portion is made of soft material, then it can reach the ear canal deeply and is comfortable, but it may be disconnected from the ear canal
Solution Approach 1:
The eartip is divided into an upper bevel portion and a lower bevel portion made of different materials with different rigidities. The upper bevel portion is made of soft silicone (rigidity 30±5) for comfort and deep insertion, while the lower bevel portion is made of rigid silicone (rigidity 40±5) for stability and prevention of detachment.
Solution Approach 2:
Different parts of the eartip have different material properties tailored to their specific functions. The upper bevel portion uses soft material for comfort and ease of insertion, while the lower bevel portion uses rigid material for stability and anchoring in the ear canal.
2Reliability
If the upper bevel portion is made of rigid material, then it is stable and unlikely to detach, but it may press against the ear canal and cause discomfort
Solution Approach 1:
The eartip is segmented into two portions with different rigidities. The upper bevel portion is soft (rigidity 30±5) for comfort, while the lower bevel portion is rigid (rigidity 40±5) for stability, resolving the contradiction between comfort and detachment resistance.
Solution Approach 2:
The lower bevel portion specifically uses rigid material to provide stability and prevent detachment without compromising the comfort provided by the soft upper bevel portion.
3Manufacturing precision
If conventional mold devices are dedicated to unique upper and lower bevel portions, then manufacturing precision is maintained, but production flexibility is reduced and costs increase
Solution Approach 1:
The second mold unit is designed with a universal lower bevel cavity that can accommodate different upper bevel portions of various sizes. This allows a single mold unit to produce multiple eartip sizes by changing only the upper bevel portion, maintaining precision while improving flexibility and reducing costs.
Solution Approach 2:
The manufacturing process is segmented into two independent stages: first forming the upper bevel portion in a first mold unit, then transferring it to the second mold unit for forming the lower bevel portion. This segmentation allows the lower bevel portion to be standardized while the upper bevel portion can vary, achieving both precision and flexibility.
Data Source
AI summary
An eartip, mold device for manufacturing the eartip, and method of manufacturing the eartip are introduced, characterized by forming an upper bevel-portion with upper and lower molds of a first mold unit, placing the upper bevel-portion in an upper bevel receiving cavity of a second mold unit, forming a lower bevel-portion with a lower bevel cavity, and joining the upper and lower bevel-portions to form an eartip. The top of the lower hollow-cored guiding tube extends to form a buffer portion which connects and communicates with the upper hollow-cored guiding tube. The upper and lower bevel-portions are made of silicone of different rigidity. The upper bevel-portion thus made is soft enough to reach a user's ear canal deeply. The lower bevel-portion thus made is rigid enough to close the ear canal. An annular buffer cavity is inwardly, concavely formed at the bottom of the lower bevel cavity.