Self-Aligning Waterproof Enclosure With Pressure Equalization
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Solution Overview
Problem
Existing electronic device enclosures, particularly those used in harsh environments like the food processing industry, face challenges with water resistance, mechanical integrity, and pressure equalization, leading to potential leakage and failure due to misalignment and pressure differentials.
Innovation Solution
A pressed fit self-aligning device enclosure (PFSADE) with a housing and cover, featuring self-aligning elements (SAEs) and a pressure balancing channel (PBC), ensuring secure alignment and pressure equalization to maintain water resistance and prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealed enclosures are used to achieve water resistance, then water resistance is improved, but manufacturing precision and alignment tolerance deteriorate
Solution Approach 1:
A compliant intermediary layer (sealing member) is introduced between the housing and cover to compensate for misalignment. This layer deforms elastically to fill gaps caused by tolerance variations, maintaining the seal without requiring high manufacturing precision. The intermediary absorbs dimensional variations while preserving water resistance.
Solution Approach 2:
The sealing system transitions from a rigid seal requiring precise alignment to a compliant seal that changes its physical state (deforms) to accommodate misalignment. The sealing member's elasticity parameter allows it to deform and fill gaps, converting a precision-dependent system into one that tolerates dimensional variations.
2Reliability
If rigid sealing structures are used to prevent leakage, then leakage prevention is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The sealing member performs self-alignment and self-sealing functions. During assembly, it automatically deforms to fill gaps and create a seal without requiring complex alignment procedures or additional fastening steps. The system serves itself by using the sealing member's inherent elasticity to both seal and align the components.
Solution Approach 2:
The alignment and sealing functions are extracted from the rigid structural components and transferred to the compliant sealing member. This separates the structural support function (housing and cover) from the sealing function (sealing member), allowing each to be optimized independently and simplifying the overall assembly process.
3Strength
If pressure differential is allowed to build up in disconnected mode, then structural integrity is improved, but water resistance and sealing performance deteriorate
Solution Approach 1:
Pressure equalization channels are pre-configured in the enclosure structure to proactively prevent pressure differential buildup. These channels provide a predetermined pressure relief path that activates automatically when pressure differences occur, equalizing pressures before they can compromise the seal or structural integrity.
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 PFSADE effectively prevents leakage and maintains water resistance by aligning the cover securely and equalizing pressure, even under displacement forces and environmental variations, ensuring consistent performance and reliability.
Implementation Method 1
the SAE may include a size and a distribution along the edge surface configured to align the cover in a relative position to the housing, and to withstand a predetermined minimum displacement force threshold
Implementation Method 2
a pressure balancing channel (PBC) may provide fluid communication between the cavity to the exterior environment
Data Source
AI summary
Apparatus and associated methods relate to an electronic device enclosure having a water resistant property capable of withstanding a predetermined minimum displacement force. In an illustrative example, a pressed fit self-aligning device enclosure (PFSADE) may include a housing and a cover. The housing, for example, may include an opening configured to receive electronic components during an assembly processing. After the electronic components are installed, for example, the cover may be coupled to the housing to cover the opening. For example, the cover may include an edge surface around a perimeter of the cover and at least one self-aligning element (SAE) extending orthogonal to the edge surface. For example, the SAE may align the cover in a relative position to the housing, and to withstand a predetermined minimum displacement force threshold. Various embodiments may advantageously prevent leakage due to out of tolerance alignment between the housing and the cover.