Ventilation Component Sealing for Stable Housing Attachment
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Solution Overview
Problem
Existing ventilation structures face challenges in maintaining a consistent sealing contact area due to changes in environmental conditions, leading to potential detachment of ventilation components from the housing.
Innovation Solution
The proposed ventilation structure includes a housing with an attachment hole and a ventilation component that features a supporting portion, a gas-permeable membrane, a protruding portion inserted into the attachment hole, and a sealing member on the outer periphery of the protruding portion. This configuration ensures that the sealing member is compressively deformed, maintaining a stable contact area even with changes in environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal ring is deformed along a taper by being sandwiched between the support and the housing, then sealing is achieved, but the contact area for sealing decreases due to changes in environmental conditions
Solution Approach 1:
The patent changes the geometric parameters of the attachment hole from a tapered shape to a columnar shape with a constant cross-section. This parameter change ensures that the sealing member maintains a consistent contact area with the housing regardless of environmental condition changes, thereby resolving the contradiction between maintaining sealing performance and preserving contact area stability.
Solution Approach 2:
The patent segments the sealing function by providing multiple sealing members (first sealing member and second sealing member) positioned at different locations along the protruding portion. This segmentation ensures that even if environmental conditions affect one sealing interface, other sealing members maintain the seal, thus preserving overall sealing performance while distributing the contact area requirement.
2Ease of manufacture
If the ventilation component is attached to the housing with a reduced contact area, then assembly is simplified, but detachment occurs under varying environmental conditions
Solution Approach 1:
The patent transitions from a single-point or small-area sealing approach to a distributed multi-dimensional sealing strategy by positioning sealing members at multiple locations (including the tip and outer periphery of the protruding portion). This dimensional expansion of the sealing contact ensures stable attachment under environmental variations while maintaining assembly simplicity through the modular protruding portion design.
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 ventilation structure effectively maintains a stable sealing performance by minimizing the decrease in contact area for sealing, even under varying environmental conditions, thus preventing detachment of the ventilation component from the housing.
Implementation Method 1
the sealing member is compressively deformed, maintaining a stable contact area even with changes in environmental conditions
Data Source
AI summary
A ventilation structure (1a) includes a housing (10a) and a ventilation component (20a). The housing (10a) has a first surface (12) defining a lateral surface of a columnar space (11c) in an attachment hole (11). The ventilation component (20a) is attached to the housing (10a) to close the attachment hole (11). The ventilation component (20a) has a ventilation path (21) between an inner space (15u) of the housing (10a) and an outer space (15s) of the housing (10a). The ventilation component (20a) includes a supporting portion (23), a gas-permeable membrane (22), a protruding portion (24), and a sealing member (25). The supporting portion (23) surrounds the ventilation path (21) in plan view. The protruding portion (24) protrudes from the supporting portion (23) toward the inner space (15u) of the housing (10a), and is inserted into the attachment hole (11). The sealing member (25) is disposed on an outer periphery of the protruding portion (24), and seals a gap between the first surface (12) and the protruding portion (24).