Shield Connector Structure for Stable Heat Dissipation Contact
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Solution Overview
Problem
The existing shield connector experiences reduced heat dissipation performance due to environmental temperature changes and a long heat dissipation path, as the insulating resin and metal terminal fitting have different linear expansion coefficients, leading to an air layer formation and increased thermal resistance.
Innovation Solution
A shield connector design featuring a heat dissipating portion in contact with both the terminal connecting portion and the shield shell, utilizing a spring member to maintain contact and shorten the heat dissipation path, thereby stabilizing heat dissipation performance across temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If insulating resin is used to form the heat dissipating portion, then heat dissipation is improved, but air layers form due to thermal expansion differences causing reduced heat dissipation performance
Solution Approach 1:
The heat dissipating portion is formed as a composite structure combining insulating resin and metal components. The metal part provides efficient heat conduction while the insulating resin provides electrical insulation. This composite approach allows simultaneous achievement of heat dissipation performance and stability by compensating for the thermal expansion differences through the metal component's higher thermal conductivity and structural stability.
Solution Approach 2:
The invention changes the material parameters of the heat dissipating portion by incorporating metal with higher thermal conductivity and different thermal expansion characteristics. This parameter change ensures that the heat dissipating portion maintains stable thermal contact with the terminal fitting across temperature variations, preventing air layer formation and ensuring reliable heat dissipation.
2Temperature
If the heat dissipating portion projects outward perpendicular to the axis, then heat dissipation surface area is increased, but the heat dissipation path length increases and thermal resistance increases
Solution Approach 1:
The heat dissipating portion extends in the axial direction (length dimension) rather than only radially outward. This dimensional change creates a longer heat dissipation path that maintains better thermal contact with the terminal fitting along its length, reducing thermal resistance while still providing sufficient heat dissipation surface area through the extended axial profile.
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 ensures stable and improved heat dissipation performance by maintaining contact between the heat dissipating portion and the terminal connecting portion, reducing thermal resistance and enhancing heat dissipation efficiency.
Implementation Method 1
a spring member for pressing the terminal connecting portion against the heat dissipating portion and the shield shell
Implementation Method 2
heat dissipating portion to be held in contact with the shield shell on the outer surface side and held in contact with the terminal connecting portion on an inner surface side
Data Source
AI summary
A shield connector of a novel structure can stably exhibit desired heat dissipation performance in a shorter heat dissipation path by suppressing a reduction in heat dissipation performance due to an environmental temperature change. A shield connector 10 includes a terminal fitting 16 including a terminal connecting portion 14 to be connected to a mating terminal 12, an insulating housing 18 for accommodating the terminal fitting 16, a shield shell 20 for covering an outer surface of the housing 18, a heat dissipating portion 22 to be held in contact with the shield shell 20 on the outer surface side and held in contact with the terminal connecting portion 14 on an inner surface side in the housing 18, and a spring member 24 for pressing the terminal connecting portion 14 against the heat dissipating portion 22 and the shield shell 20.