Shielded Connector Assembly Without Cover Openings
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Solution Overview
Problem
The existing electromagnetic shield covers in connector units have openings due to the bent fixing portions, which compromise the shielding effect and may lead to water ingress and corrosion.
Innovation Solution
A connector unit design featuring an electromagnetic shield member fixed between a cover body and a cover fixing plate, with an electrically conductive bracket having reinforcing ribs, ensuring stable grounding and enhanced shielding without openings in the cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electromagnetic shield cover uses a bent fixing portion to fix the electromagnetic shield member, then the electromagnetic shield member can be fixed to the electromagnetic shield cover, but an opening is formed in the electromagnetic shield cover which reduces the electromagnetic shielding effect
Solution Approach 1:
The electromagnetic shield cover is divided into two separate components: the cover body and the cover fixing plate. The cover fixing plate is fixed to the cover body, and the electromagnetic shield member is sandwiched between them. This segmentation allows the fixing function to be separated from the shielding surface, eliminating the need for openings in the cover body while maintaining reliable fixation.
Solution Approach 2:
The cover fixing plate acts as an intermediary component between the cover body and the electromagnetic shield member. It provides the fixing function without requiring direct modification of the cover body, thus preserving the integrity and shielding effectiveness of the cover body.
2Strength
If the electromagnetic shield cover is formed with an opening for fixing the electromagnetic shield member, then the electromagnetic shield member can be secured, but the shielding effect is reduced and corrosion vulnerability increases
Solution Approach 1:
By segmenting the fixing function into a separate cover fixing plate, the cover body remains intact without openings. This prevents corrosion from penetrating through openings while maintaining strong fixation through the sandwich structure with the cover fixing plate.
3Ease of manufacture
If the electrically conductive bracket is made without reinforcing ribs, then the manufacturing process is simpler, but the bracket exhibits vibration in the thickness direction during grounding
Solution Approach 1:
Reinforcing ribs are added to the electrically conductive bracket to increase rigidity and reduce vibration in the thickness direction during grounding operations.
Data Source
AI summary
A connector unit is provided with a first connector, a second connector, a plurality of wires for electrically connecting the first connector and the second connector, an electromagnetic shield member for covering the plurality of wires, an electromagnetic shield cover fixed to the first connector while covering the first connector, and an electrically conductive bracket to be fixed to a ground target part while being separated from the second connector. The electromagnetic shield cover includes a cover body and a cover fixing plate to be fixed to the cover body. One end part of the electromagnetic shield member is fixed to the electromagnetic shield cover by being sandwiched by the cover body and the cover fixing plate. The electrically conductive bracket is fixed to another end part of the electromagnetic shield member. The electrically conductive bracket includes a reinforcing rib projecting in a thickness direction of the electrically conductive bracket.