Elastic Membrane Button for Watertight Hearing Device Sealing
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Solution Overview
Problem
Hearing devices, particularly custom models, face challenges in maintaining a compact, watertight, and acoustically-tight design due to the need for user interfaces like push-buttons and switches, which create entry points for humidity, grease, and sound leakage, compromising their functionality in damp environments.
Innovation Solution
A compact button structure featuring an elastic member with aligned openings for sound transmission and a switch component, integrated with an outer shielding for a watertight and acoustically-tight seal, utilizing soft and compliant materials to reduce noise and enhance user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If user interface components like push-buttons and switches are added to hearing devices, then ease of operation is improved, but the device becomes vulnerable to humidity and grease ingress through openings
Solution Approach 1:
The patent employs an elastic member with a membrane structure that forms the user interface surface. This flexible membrane allows user interaction through pressing while maintaining a sealed barrier against humidity and grease ingress. The elastic nature of the membrane enables it to deform under finger pressure to activate switches underneath, then return to its original position, all while maintaining the protective seal.
Solution Approach 2:
The elastic member acts as an intermediary between the user's finger and the internal switch components. It transmits the mechanical force of finger pressing to activate the switches while simultaneously serving as a protective barrier. This intermediary structure allows the user interface to function without creating direct openings in the protective shielding.
2Ease of operation
If openings are created in the outer shielding for user interface access, then ease of operation is improved, but acoustic tightness deteriorates
Solution Approach 1:
The elastic member with its membrane structure provides a flexible yet acoustically-tight barrier. The membrane is sufficiently thin to allow finger pressing from the outside while being sufficiently dense and continuous to block sound transmission. This enables the user interface to remain accessible while maintaining acoustic isolation of the internal components.
3Volume of moving object
If multiple components are positioned closely together for compactness, then volume is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent combines multiple functions into the elastic member structure itself. The elastic member serves as both the user interface surface, the protective seal, and the mechanical coupling element for the switches. By integrating these functions into a single component rather than using separate parts, the design achieves compactness while reducing the cumulative positioning tolerances that would result from assembling multiple discrete components.
Solution Approach 2:
The elastic member performs multiple functions simultaneously: it provides the user interface surface for finger pressing, maintains the protective seal against environmental factors, transmits mechanical force to activate switches, and ensures acoustic tightness. This multi-functionality reduces the total number of components needed, thereby achieving compactness while simplifying the positioning requirements.
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 seals against water and sound, protecting internal components from environmental exposure while allowing sound to reach microphones, thus enhancing the hearing device's functionality and durability in humid conditions.
Implementation Method 1
The protruding part has a first opening which is positioned such that it is aligned with the first microphone input... sound is able to travel from outside the structure to the microphone via the openings
Implementation Method 2
the outer shielding is in tight contact with the elastic member so as to create a watertight and acoustically-tight seal... impermeable to water except when under sufficient pressure to produce structural discontinuity
Implementation Method 3
the outer shielding is in tight contact with the elastic member so as to create a watertight and acoustically-tight seal... no sound or as little sound as possible enters at the seal
Implementation Method 4
The elastic member may be made from a soft and compliant elastic material... reduces noise due to handling
Data Source
AI summary
A button structure for a hearing device, includes: a first microphone, the first microphone being configured to receive sound via a first microphone input; an elastic member comprising a first part and a second part, the first part comprising a user interface surface, the second part comprising a first opening, the first opening being aligned with the first microphone input; a switch component, wherein the user interface surface is configured to be operated by a user to activate the switch component; and an outer shielding comprising a shield opening and a second opening, wherein at least a portion of the first part of the elastic member extends through the shield opening, wherein the second opening of the outer shield is aligned with the first opening of the second part of the elastic member, and wherein the outer shielding is in contact with the elastic member to create a seal.