Waterproof Connector Fastening Inside the Mating Cylinder
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Solution Overview
Problem
Existing connectors require larger casings to ensure waterproofing, leading to increased size due to the need for fastening members on the outer side of the cylindrical section, which can result in inefficiencies and potential misalignment issues.
Innovation Solution
A connector design featuring a casing with a cylindrical section, a packing to seal the annular space, a fastening member that penetrates the casing through a through-hole to fix the connector to a fixed wall surface, and a seal member to seal the gap between the fastening member and the through-hole, allowing the fastening member to be positioned within the waterproof region, thus maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the fastening member is positioned on the outer side of the cylindrical section to fix the casing and mating connector, then the connection stability is improved, but the casing size increases
Solution Approach 1:
The fastening member is positioned inside the cylindrical section rather than on the outer side, nesting the fastening function within the existing cylindrical space. This eliminates the need for additional outer structure while maintaining the fastening function, thereby reducing casing size while preserving connection stability
Solution Approach 2:
Instead of placing the fastening member on the outer side of the cylindrical section as in conventional designs, the invention inverts the arrangement by positioning it inside the cylindrical section. This inversion allows the fastening member to secure the connection from the interior, achieving stable fixation without increasing the external dimensions of the casing
2Stability of the object's composition
If the fastening member is positioned on the outer side of the cylindrical section, then the connection stability is improved, but the alignment precision deteriorates
Solution Approach 1:
By nesting the fastening member within the cylindrical section, the invention uses the cylindrical section itself as a positioning guide. The cylindrical geometry provides inherent alignment features that ensure precise positioning of the fastening member, eliminating alignment issues that would arise from external positioning while maintaining connection stability
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
This configuration prevents the connector from becoming larger and ensures secure, aligned connections by positioning the fastening member centrally within the cylindrical section, enhancing waterproofing and preventing water intrusion while maintaining a smaller casing size.
Implementation Method 1
a packing that seals an annular space between an outer peripheral surface of the cylindrical section and the mating connector
Implementation Method 2
a seal member that seals an annular gap between an outer peripheral surface of the fastening member and an inner surface of the through-hole
Data Source
AI summary
A connector includes a casing that holds, on the inside, a terminal provided at the end of an electric wire and includes a cylindrical section fitted with a mating connector of a mating device (a connection target) in a fitting direction, a packing that seals an annular space between the outer peripheral surface of the cylindrical section and the mating connector, a fastening member that is attached to penetrate the inside of the cylindrical section in the fitting direction from a through-hole formed in one end face in the fitting direction of the casing, and is fixed to a fixed wall surface of the mating device in a state in which the cylindrical section and the mating connector are fitted, and a seal member that seals an annular gap between the outer peripheral surface of the fastening member and the inner surface of the through-hole.