Substrate Unit Water Management via Protruding Casing
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Solution Overview
Problem
Existing substrate units face challenges in preventing water from reaching the mounting surface while maintaining a simple structure and avoiding increased manufacturing costs, as sealing methods can be complex and costly.
Innovation Solution
A substrate unit design featuring a first casing member and a second casing member with a protruding portion that intersects the mounting surface, combined with a conductive member that facilitates water discharge through a water discharge flow channel, preventing water from reaching the substrate and allowing easy discharge of water that has entered the housing space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing member is used to seal the inside of the casing, then water intrusion is prevented, but manufacturing costs increase
Solution Approach 1:
The substrate unit's own structure (casing members with protruding portions and water discharge flow channels) performs the water prevention and discharge function without requiring external sealing members, thereby reducing manufacturing costs while maintaining water intrusion prevention capability
Solution Approach 2:
The casing is divided into first and second casing members with specific structural features (protruding portions and flow channels) that collectively achieve water prevention, eliminating the need for separate sealing components
2Reliability
If a complex sealing structure is employed to prevent water from reaching the substrate, then water protection is improved, but device complexity increases
Solution Approach 1:
The water prevention function is merged into the existing casing structure through protruding portions and flow channels, rather than adding separate sealing components, thereby maintaining simple device architecture while achieving effective water protection
Solution Approach 2:
The protruding portions and water discharge flow channels serve multiple functions: they act as both structural support elements and water management features, preventing water intrusion while facilitating water discharge without requiring dedicated sealing components
3Ease of operation
If water discharge flow channel is provided, then water discharge is facilitated, but device complexity increases
Solution Approach 1:
The water discharge flow channel is integrated into the existing casing structure, combining water discharge functionality with the structural framework, thereby facilitating water discharge without significantly increasing device complexity
Data Source
AI summary
Provided is a substrate unit that has a simple structure and is able to prevent water that has entered the inside from reaching a mounting surface of the substrate. The substrate unit includes: a substrate, a first casing member that supports the substrate, and a second casing member that is integrated into one piece with the first casing member and is provided on a mounting surface side of the substrate, wherein the second casing member is provided with a protruding portion that protrudes into a housing space that is defined by the first casing member and the second casing member and houses the substrate, and intersects a plane that extends along the mounting surface of the substrate.