Connector Shield Shell Through Hole Drainage Design
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Solution Overview
Problem
Conventional connectors allow liquid to flow into the space between the fitting portion and the counterpart fitting portion due to inadequate drainage, leading to liquid accumulation and inflow issues.
Innovation Solution
A connector design featuring a shield shell with a through hole in the bent portion between the flange and fixed portions, combined with annular water stop members to prevent inflow and facilitate liquid discharge, ensuring effective liquid tightness and drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a through hole is provided in the bent portion to drain liquid, then liquid discharge is promoted, but liquid may still enter the space between the flange portion and wall surface before draining through the hole
Solution Approach 1:
The water stop member is installed in advance in the space between the flange portion and the wall surface to prevent liquid from entering this space before the liquid can drain through the through hole. This preliminary protective measure ensures that even if liquid reaches the bent portion, it cannot infiltrate the critical space between the flange and wall surface.
Solution Approach 2:
The water stop member acts as an intermediary element between the liquid and the space between the flange portion and wall surface. It blocks the liquid's path to this space while allowing the through hole to continue its drainage function, thus mediating between the conflicting requirements of liquid discharge and liquid prevention.
2Device complexity
If the shield shell structure is simplified without additional liquid prevention components, then device complexity is reduced, but liquid accumulation in the bent portion curve cannot be effectively prevented
Solution Approach 1:
Instead of redesigning the entire shield shell structure, the water stop member is locally installed only in the specific space between the flange portion and the wall surface where liquid accumulation and infiltration problems occur. This localized solution maintains the overall simplicity of the shield shell structure while effectively addressing the liquid accumulation issue.
Solution Approach 2:
The liquid prevention function is segmented from the main shield shell structure. The water stop member is installed separately in the gap between the flange and wall surface, allowing the shield shell to maintain its original simple structure while the segmented water stop component provides the necessary liquid prevention capability.
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 design effectively promotes the discharge of liquid from the bent portion and prevents inflow into the space between the fitting portions, enhancing liquid tightness and reducing accumulation risks.
Implementation Method 1
an annular water stop member attached to the flange portion and pressed between the flange portion and the wall surface of the counterpart wall member
Implementation Method 2
a through hole provided in a bent portion between the flange portion and the fixed portion and causing inside and outside thereof to communicate with each other
Data Source
AI summary
A connector includes: a terminal fitting; a housing containing the terminal fitting inside and provided with a fitting portion inserted and fitted into inside of a hole-shaped counterpart fitting portion of a counterpart wall member; a shield shell including a cylindrical portion covering, from outside, a projecting portion of the housing, a flange portion projecting outer than an outer circumferential surface of the cylindrical portion, and a fixed portion bent from an end portion of the flange portion and fixed on an end surface of the counterpart wall member; and an annular water stop member attached to the flange portion and pressed between the flange portion and the wall surface of the counterpart wall member. The shield shell is provided with a through hole provided in a bent portion between the flange portion and the fixed portion and causing inside and outside thereof to communicate with each other.