Waterproof Connector Venting for Pressure-Stable Wire Sealing
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Solution Overview
Problem
Conventional waterproof connectors face challenges in maintaining precision and workability due to the need for high-precision molding of waterproof members, which can lead to increased costs and susceptibility to shape changes under internal pressure changes, potentially causing gaps or excessive loads on the waterproof member.
Innovation Solution
A connector design featuring a waterproof member with an elastic deformable structure and a ventilation component that allows gas passage while preventing liquid passage, ensuring a sealed space and reducing the risk of shape changes due to internal pressure fluctuations, thereby enhancing waterproof properties without the need for precise matching of the waterproof member's shape to the housing or wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the waterproof member is molded to exactly match the outer shape of the housing or electric wire to avoid internal space, then the waterproof property is improved, but the manufacturing precision requirement increases and workability deteriorates
Solution Approach 1:
The waterproof member is designed with flexible elastic material that can deform to accommodate internal space while maintaining close contact with the housing and electric wire. The elasticity allows the member to adapt to pressure changes without requiring precise molding, resolving the contradiction between waterproof reliability and manufacturing precision requirements
2Ease of manufacture
If internal space is allowed inside the waterproof member to improve workability and reduce costs, then the manufacturing complexity decreases, but the waterproof property deteriorates due to shape changes under pressure
Solution Approach 1:
The waterproof member's elastic properties are optimized to allow controlled deformation under pressure while maintaining sealing effectiveness. By adjusting the material parameters and structural design, the member can accommodate internal space for easier manufacturing while dynamically adapting its shape to maintain waterproof reliability under various pressure conditions
3Adaptability or versatility
If the waterproof member is made more flexible to accommodate pressure changes, then the adaptability improves, but the risk of gap formation and excessive load increases
Solution Approach 1:
The waterproof member is pre-designed with appropriate elastic characteristics and structural features that cushion against excessive deformation. This beforehand cushioning through proper material selection and structural design allows the member to adapt to pressure changes while preventing gap formation and excessive load, maintaining sealing reliability under varying conditions
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 solution improves the waterproof properties of connectors by allowing for elastic deformation and gas venting, reducing the risk of gaps and overload on the waterproof member, while maintaining a sealed environment and reducing manufacturing complexity and costs.
Implementation Method 1
a ventilation component that is assembled to the lid member, enables passage of gas between the first sealed space part and the outside of the housing, and disables passage of liquid between the first sealed space part and the outside of the housing
Implementation Method 2
a waterproof member being elastically deformable and including one end part with an inner peripheral surface in close contact with an outer peripheral surface of an end part of the housing on the electric wire drawing port side
Data Source
AI summary
A connector includes: a terminal fitting connected to an electric wire; a housing including a housing chamber, an electric wire drawing port, a communication hole, and a counterpart fitting chamber where a gap formed between the counterpart fitting chamber and a counterpart terminal fitting is filled with a first sealing member; a lid member; a second sealing member that fills a gap between these and forms a first sealed space part in the housing with the first sealing member; a waterproof member including one end part in close contact with an end part of the housing, the other end part in close contact with the electric wire drawn from the electric wire drawing port, and a tubular part, the tubular part including a second sealed space part communicating with the first sealed space part through the electric wire drawing port; and a ventilation component.