In-ear Device Pressure Regulation Mechanism
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Solution Overview
Problem
Inflatable in-ear devices often overinflate when constrained within the ear canal, causing discomfort due to excessive internal pressure, and existing solutions fail to effectively regulate pressure during inflation.
Innovation Solution
An inflatable in-ear device with a pressure regulating mechanism that includes a relief valve or unloading mechanism to control the amount of settable compound injected, ensuring the pressure remains within a comfortable range by allowing excess compound to be discharged when a predetermined pressure level is reached, thereby preventing overinflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the in-ear device is inflated to conform to the ear canal, then the noise protection performance is improved, but the internal pressure rises causing discomfort or injury to the wearer
Solution Approach 1:
The patent applies parameter changes by implementing a pressure regulating mechanism that dynamically adjusts the internal pressure parameter of the inflatable sheath. The mechanism includes a pressure sensor that monitors internal pressure and a control system that activates a deflation valve when pressure exceeds a predetermined threshold, thereby maintaining pressure within a comfortable range while ensuring adequate sealing for noise protection.
Solution Approach 2:
The patent implements feedback control through a closed-loop pressure regulation system. The pressure sensor continuously monitors the internal pressure of the sheath and provides feedback to the control circuit, which then adjusts the deflation valve accordingly. This feedback mechanism ensures that pressure is maintained at optimal levels for both comfort and noise protection performance.
2Manufacturing precision
If a settable compound is injected through an injection channel to fill the space between core and sheath, then the custom-fitting is achieved, but the internal pressure rises causing overinflation
Solution Approach 1:
The patent introduces an intermediary pressure regulating mechanism between the injection channel and the sheath cavity. This mechanism includes a pressure sensor and control system that act as intermediaries to monitor and regulate the pressure of the settable compound during injection, preventing overinflation while ensuring adequate filling for custom-fitting.
Solution Approach 2:
The patent applies dynamics by implementing a dynamic pressure regulation system that continuously adapts to changing conditions during the injection process. The pressure sensor and control system dynamically adjust the injection rate and pressure limits based on real-time measurements, ensuring optimal filling without excessive pressure buildup.
3Shape
If the sheath is constrained within the ear canal during inflation, then the custom-fitting to ear canal contours is achieved, but the pressure cannot be released causing discomfort
Solution Approach 1:
The patent applies segmentation by dividing the sheath into functionally distinct zones: an inflation zone that contacts the ear canal walls for shaping, and a regulated pressure zone monitored by the pressure sensor. The pressure regulating mechanism creates a functional segmentation between the structural function (maintaining shape) and the comfort function (controlling pressure), allowing both objectives to be achieved simultaneously.
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 pressure regulating mechanism ensures the in-ear device conforms to the ear canal without discomfort, allowing sufficient expansion for proper noise protection while preventing excessive pressure, thus enhancing user comfort and noise protection.
Implementation Method 1
a pressure regulating mechanism associated with the outflow channel... in the form of a relief or unloading valve enabling the modulation of pressure
Implementation Method 2
a settable compound being injected into the cavity defined between the core member and the sheath to bring the device into morphological conformity
Data Source
Figure 1
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AI summary
An inflatable in-ear device (1) incorporates a pressure regulating mechanism, for example a simple length of tubing (30) or a relief/unloader valve (50), at the inflow or outflow from the inflating sheath (8) inserted within the ear canal (22), thus allowing pressure regulation of the settable compound being injected for inflation of the sheath (8) while avoiding excesses in pressure in the inflating compound and ensuring the comfort of the individual.