Shield Connector Locking Groove for Low-Resistance Insertion
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Solution Overview
Problem
Existing shield connectors face increased insertion resistance and impedance mismatch due to the sliding contact of locking pieces with the inner peripheral surface of the dielectric during inner conductor insertion, which can be mitigated by enlarging the inner diameter of the center hole, but this compromises impedance matching.
Innovation Solution
A shield connector design featuring a resiliently displaceable locking spring projecting from the outer peripheral surface of the body portion, with an escaping groove recessed in the circumferential direction on the inner peripheral surface of the dielectric, allowing the locking spring to pass through and reducing sliding resistance while minimizing air layer volume to maintain impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the inner diameter of the center hole is enlarged to reduce insertion resistance, then the locking piece slides more easily during insertion, but the volume of the air layer increases causing impedance matching to deteriorate
Solution Approach 1:
The patent applies local quality by creating an escaping groove only at the specific location where the locking piece makes contact with the inner peripheral surface. This localized modification reduces insertion resistance at the critical contact point without enlarging the entire center hole, thereby maintaining impedance matching in other regions. The groove is positioned precisely where needed rather than applying a global change to the structure.
2Ease of operation
If the locking piece is made resilient to reduce insertion resistance, then the locking piece can deform during insertion, but this increases device complexity
Solution Approach 1:
The patent segments the contact interface between the locking piece and the dielectric by introducing an escaping groove. This groove creates a dedicated path that separates the locking function from the sliding function, allowing the locking piece to engage securely while reducing friction during insertion. The segmentation avoids the need for complex resilient mechanisms by structurally separating these two functions.
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 reduces insertion resistance and suppresses impedance mismatch by allowing the locking spring to slide through the escaping groove without deforming, thereby maintaining optimal impedance matching.
Implementation Method 1
a resiliently displaceable locking spring projects from an outer peripheral surface of a body portion
Data Source
AI summary
A shield connector A includes an inner conductor 20 shaped such that a resiliently displaceable locking spring 24 projects from an outer peripheral surface of a body portion 21 having an axial direction oriented in a front-rear direction, and a dielectric 30 for retaining and accommodating the inner conductor 20 inserted from behind. The dielectric 30 includes an accommodation chamber 31 for accommodating the body portion 21, a locking portion 36 for retaining the inner conductor 20 by being locked to the locking spring 24, and an escaping groove 37 formed by recessing only a region facing the locking spring 24 in a circumferential direction, out of an inner peripheral surface of the accommodation chamber 31.