Electrical Connector Spring Arm Impedance Control
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Solution Overview
Problem
Existing electrical contacts with angled parts and barbed structures for enhanced retention often deviate from the regulated impedance range due to the positions and dimensions of the contacting and tail sections.
Innovation Solution
The design features an electrical connector with insulative housing and contacts having a spring arm with a wide plate section and a narrow bulged contacting section, along with sideward spaced blades and a soldering tail, allowing for downward deflection to achieve parallel alignment with the conductive pad, thereby adjusting impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If barbed structures are added to enhance retention force, then retention force is improved, but impedance deviation increases
Solution Approach 1:
The contact is divided into functionally independent segments: the resilient contacting section with barbed structures for retention, and the stiff tail section with precisely controlled geometry for impedance control. This segmentation allows each part to optimize its function without compromising the other.
Solution Approach 2:
Different parts of the contact have different structural qualities tailored to their specific functions. The contacting section has barbed structures and resilient properties for retention, while the tail section has precise dimensional control and stiffness for impedance control. This local differentiation resolves the contradiction between retention force and impedance precision.
2Manufacturing precision
If contacting section and tail section dimensions are adjusted, then impedance control is improved, but retention force decreases
Solution Approach 1:
The contact is segmented into a resilient contacting section for retention and a stiff tail section for impedance control. By separating these functions into different segments with different mechanical properties, the design achieves both strong retention force and precise impedance control without compromise.
Solution Approach 2:
The contacting section is designed to be resilient and deflectable, allowing it to maintain strong retention force through elastic deformation. Meanwhile, the tail section maintains stiffness for precise impedance control. This dynamic flexibility in the contacting section enables both retention and impedance control to coexist.
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 effectively removes unwanted impedance deviation, ensuring the electrical connector operates within the regulated 85+/−15Ω range by optimizing the structural arrangement around the soldering tail and spring arm.
Implementation Method 1
the spring arm is downwardly deflected to have the plate section of the spring arm parallel to the soldering tail and also parallel to the corresponding conductive pad
Data Source
AI summary
A plurality of contact are received within the corresponding passageways of the insulative housing of an electrical connector, respectively. Each contact has juxtaposed first body and second body angled with each other via a connecting section linked therebetween. A resilient contacting section extends upwardly from the first body. A spring arm extends upward from the first body and includes a wide plate section adjacent to the first body and a narrow bulged contacting section at a top thereof. During operation, the plate section is parallel to a top face of the housing in a compressed manner.