Connector Wire Fixing Structure for High-Speed Signal Integrity
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Solution Overview
Problem
The assembly of connectors for high-speed signal transmission is hindered by the need for high dimensional accuracy of components and the adverse effect of adhesive on dielectric constant, leading to signal integrity issues and assembly difficulties.
Innovation Solution
A connector design featuring a fixing mechanism with injection-molded first and second fixing members that secure wires to a circuit board without covering the terminals, reducing the dielectric constant and improving assembly precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is coated to the entire solder pad area to secure wires, then the wires are firmly fixed to the circuit board, but the dielectric constant increases leading to signal integrity deterioration
Solution Approach 1:
The patent applies adhesive only to specific local areas (solder pad edges) rather than the entire solder pad area. This localized application maintains wire fixation strength while minimizing the dielectric constant increase, thereby preserving signal integrity in high-speed connector applications.
Solution Approach 2:
The adhesive application area is segmented into discrete regions (edges of solder pads) rather than continuous coverage. This segmentation reduces the overall dielectric material presence while maintaining mechanical bonding functionality, resolving the contradiction between fixation strength and signal integrity.
2Manufacturing precision
If the circuit board, front housing, and rear housing are assembled with high dimensional accuracy, then the connector components fit together precisely, but the assembly process becomes difficult and time-consuming
Solution Approach 1:
The circuit board is pre-assembled with the rear housing and wires soldered onto it before inserting into the front housing. This preliminary assembly sequence simplifies the overall assembly process by reducing the number of components that need to be aligned simultaneously, making high-precision assembly more manageable.
Solution Approach 2:
The connector assembly is divided into separate modules (circuit board with rear housing as one module, front housing as another). This segmentation allows each module to be prepared independently with precise dimensions, then assembled together, reducing the overall assembly complexity while maintaining precision.
3Strength
If plastic is injected into the housing to secure wires, then the wires are further secured, but the plastic easily escapes from the housing making it difficult to control
Solution Approach 1:
The patent removes the problematic plastic injection step entirely and replaces it with adhesive bonding. This extraction of the uncontrolled plastic injection process eliminates the issue of plastic escaping while maintaining wire securing functionality through the adhesive bonding mechanism.
Solution Approach 2:
Adhesive is introduced as an intermediary material to secure wires to the circuit board, replacing the plastic injection method. The adhesive provides controlled bonding without the escape and control issues associated with molten plastic, achieving wire securing strength through a more manageable material.
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 enhances signal integrity and simplifies assembly by controlling the dielectric constant and reducing the coverage area of the fixing material, allowing for precise parameterization and improved installation of the connector components.
Implementation Method 1
a fixing mechanism mounted in the housing and fixing the wires on the circuit board
Data Source
AI summary
A connector includes a housing, a circuit board inserted into the housing and having a plurality of first terminals located on a pair of opposite sides of the circuit board at a rear end of the circuit board, a plurality of wires including a plurality of connecting terminals that are each electrically connected to one of the first terminals, and a fixing mechanism mounted in the housing and fixing the wires on the circuit board. The connecting terminals and the first terminals are exposed outside the fixing mechanism.