Shielded Connector Rib Structure for Creep-Resistant Sealing
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Solution Overview
Problem
Existing shielded connectors face challenges in preventing creep deformation of the housing under high-temperature environments, which can lead to a decrease in sealing pressure and impaired waterproofing, while also increasing the force required for assembly and lowering workability.
Innovation Solution
A shielded connector design that includes a housing with ribs along its outer peripheral surface corresponding to the outside of the opening, and a holding surface on the inner surface of the shield shell that only contacts the ends of the ribs, preventing expansion deformation during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If ribs are added to prevent creep deformation, then housing stability is improved, but assembly force increases
Solution Approach 1:
The rib structure is designed with varying heights where the first rib has a greater height than the second rib. This local differentiation allows the first rib to provide enhanced creep prevention at critical areas while the shorter second rib reduces interference during assembly, thus resolving the contradiction between stability and assembly force
Solution Approach 2:
The rib structure is divided into multiple segments (first rib and second rib) with different functions. The first rib segment provides primary creep resistance, while the second rib segment provides secondary support with reduced assembly interference. This segmentation allows each part to be optimized for its specific function, balancing stability and assembly ease
2Stability of the object's composition
If ribs extend along the shield shell assembling direction, then creep deformation is prevented, but workability deteriorates
Solution Approach 1:
The rib structure implements local quality by creating different rib heights at different positions. The first rib with greater height is positioned to provide maximum creep resistance where needed, while the second rib with smaller height is positioned to minimize assembly interference, thus improving workability without sacrificing creep prevention capability
Solution Approach 2:
Instead of making all ribs uniform in height to simplify assembly, the invention inverts the approach by making ribs of different heights where the taller rib provides structural support and the shorter rib facilitates assembly. This inverted thinking resolves the contradiction by accepting local complexity to achieve global improvement in both creep resistance and workability
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 design effectively prevents creep deformation of the housing, maintains assembly performance, and ensures a reliable waterproof seal even under high-temperature conditions.
Implementation Method 1
an annular seal member configured to seal a gap between an inner peripheral side seal surface of the opening and an outer peripheral side seal surface of the cover
Implementation Method 2
When the inner peripheral side seal surface of the working hole is creep-deformed outward by a reaction force of the seal ring under the high-temperature environment
Data Source
AI summary
There is provided a shielded connector including: a housing having a fitting portion to be fitted to a counterpart connector; a cover assembled to an opening opposite to the fitting portion; an annular seal member sealing a gap between the opening and the cover; a shield shell externally fitted to the housing to cover the opening; ribs disposed along an outer peripheral surface of the housing corresponding to an outside of the opening and extending along an assembling direction of the shield shell; and a holding surface projecting from an inner surface of the shield shell such that only an end of the ribs in an open end of the opening comes into contact with the holding surface to prevent the opening from being deformed in an expansion direction when the shield shell is assembled to the housing.