Pressure-Responsive Valve for Wearable Acoustic Module Waterproofing
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Solution Overview
Problem
Existing waterproof sound-permeable membranes in acoustic modules of wearable devices fail to withstand prolonged water pressure, leading to accelerated damage and reduced service life.
Innovation Solution
A waterproof valve assembly embedded in the acoustic port, comprising a piston rod and resetting spring, which blocks the port under high water pressure to protect the sound-permeable membrane by using pressure differences to extend into the port and seal it, preventing further water pressure from being applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waterproof sound-permeable membrane is used to block liquid entry through the acoustic port, then waterproof performance is improved, but the membrane is subjected to prolonged water pressure leading to accelerated damage and reduced service life
Solution Approach 1:
The waterproof protection function is segmented into two parts: the sound-permeable membrane provides primary waterproofing, while the waterproof valve assembly provides secondary protection by blocking the acoustic port under high pressure conditions. This segmentation allows each component to operate within its optimal pressure range, extending the membrane's service life.
Solution Approach 2:
The waterproof valve assembly acts as an intermediary between the external water pressure and the sound-permeable membrane. When water pressure exceeds a threshold, the valve stretches into the acoustic port to block it, preventing excessive pressure from being transmitted to the membrane and causing damage.
2Ease of operation
If the acoustic port remains open for acoustic communication, then sound transmission and reception are enabled, but water pressure can directly act on the sound-permeable membrane causing damage
Solution Approach 1:
The waterproof valve assembly is designed to dynamically respond to pressure changes. Under normal conditions, the acoustic port remains open for sound communication. When water pressure exceeds the threshold, the valve automatically stretches into the port to block it, and returns to its original position when pressure is relieved, enabling automatic adaptation to different operating conditions.
Solution Approach 2:
The waterproof valve assembly utilizes the pressure difference between external water and internal air as its driving force. When external water pressure exceeds internal air pressure, the pressure difference automatically drives the valve to stretch and block the acoustic port, eliminating the need for external control mechanisms.
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 prolongs the service life of the sound-permeable membrane by shielding it from prolonged water pressure, thereby delaying damage and maintaining the acoustic module's waterproof integrity.
Implementation Method 1
a resetting spring is sleeved on a rod end of the piston rod... the other end of the resetting spring abuts on an inner end surface of a head end of the piston rod
Implementation Method 2
the waterproof valve assembly is used to stretch into the acoustic port to block the acoustic port when an external water pressure is greater than an air pressure in the housing
Data Source
AI summary
The present invention discloses an acoustic module waterproof protection mechanism, including an acoustic module arranged in a housing, an acoustic port provided on an outer wall of the housing and communicating with the acoustic module, a waterproof sound-permeable membrane arranged on an inner wall of the housing and covering the acoustic port, the an acoustic module waterproof protection mechanism further includes a waterproof valve assembly embedded in a hole wall of the acoustic port in a stretchable manner, which is used to stretch into the acoustic port to block the acoustic port when an external water pressure is greater than an air pressure in the housing.