Shield Contact Beam Layout for Low-Wear Mating Cycles
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Solution Overview
Problem
Existing shield contact systems suffer from significant wear of contact points due to the leading edge of the male shield contacting and sliding along the contact beam during insertion, leading to a limited number of mating cycles.
Innovation Solution
A shield contact system design where protrusions on the first shield deflect the contact beams of the second shield away from the first shield body during insertion, minimizing contact and wear by allowing a short wiping distance and multiple contact points for redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contact beam contacts the outer surface of the male shield during insertion, then electrical connection is formed, but wear on the contact point increases significantly
Solution Approach 1:
The contact beam is segmented into multiple contact points distributed along its length. Instead of relying on a single contact point that slides along the entire insertion distance, the system divides the contact function across multiple points, so that not all contact points experience wear simultaneously. This segmentation distributes the wear burden and extends the overall usable life of the contact system.
Solution Approach 2:
The contact beam extends beyond what is minimally necessary for electrical connection. By having the contact beam protrude further and include multiple contact points, the system ensures that electrical connection is established with only partial contact during insertion. The extra contact points serve as redundancy, allowing the system to function even when some contact points wear down, thus extending duration of action.
2Reliability
If the contact point slides along the outer surface over a significant portion of insertion, then connection is maintained, but wiping distance increases wear
Solution Approach 1:
The contact beam is divided into multiple discrete contact points along its length. This segmentation reduces the wiping distance for each individual contact point because not the entire contact beam length experiences sliding contact. Each contact point has a shorter effective wiping path, reducing material loss per mating cycle while maintaining reliable connection through the distributed contact points.
Solution Approach 2:
Different portions of the contact beam have different functional qualities. The contact points are strategically positioned and sized to provide optimal local contact characteristics. By varying the local properties (contact point size, spacing, and position) along the contact beam, the system achieves reliable connection with minimized wiping distance at each specific contact location, reducing overall material wear.
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 wear on contact points, extending the usable life of the shield contact system by allowing a greater number of mating cycles with minimal damage.
Implementation Method 1
The protrusion deflects the contact beam away from the first shield body in the deflected state
Data Source
AI summary
A shield contact system includes a first shield having a first shield body and a protrusion extending from the first shield body, and a second shield having a second shield body and a contact beam extending from the second shield body. The first shield and the second shield are inserted together along an insertion direction from a deflected state to a mated state. The protrusion deflects the contact beam away from the first shield body in the deflected state. The contact beam abuts the first shield body in the mated state.