Rotating Shaft Support Structure for Flexible Circuit Wear Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing foldable electronic devices face issues with flexible circuit boards wearing out due to repeated contact with structural members in the rotating shaft mechanism, leading to potential short circuits and damage due to exposure of conductive wires.
Innovation Solution
The rotating shaft mechanism incorporates a support member with a protection portion that includes an insulation wear-resistant surface to prevent wear and short circuits, ensuring the flexible circuit board is supported by a low-friction surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible circuit board repeatedly contacts structural members in the rotating shaft mechanism during folding/unfolding operations, then the circuit board enables electrical connection between main bodies, but the surface layer of the circuit board is worn and conductive wires are exposed causing short circuits
Solution Approach 1:
The patent introduces a protective coating layer as an intermediary between the flexible circuit board and the structural members of the rotating shaft mechanism. This coating layer acts as a mediator that prevents direct contact and friction between the circuit board surface and the structural members, thereby eliminating wear and preventing exposure of conductive wires during repeated folding and unfolding operations.
Solution Approach 2:
The patent changes the surface properties of the protective coating by controlling its thickness and material composition. The coating thickness is designed to be sufficient to prevent wear through the circuit board surface layer but thin enough to maintain flexibility and electrical performance. This parameter optimization resolves the contradiction between providing adequate protection and maintaining circuit board functionality.
2Reliability
If the flexible circuit board is supported by structural members during rotation, then the circuit board maintains electrical connection, but friction causes surface wear and potential short circuits
Solution Approach 1:
The protective coating serves as an intermediary layer that reduces friction between the flexible circuit board and the structural members. By providing a low-friction surface, the coating minimizes wear during repeated contact while maintaining the mechanical support and electrical connection functionality required for reliable operation of the foldable device.
Solution Approach 2:
The patent employs composite material structure consisting of the flexible circuit board substrate combined with a protective coating layer. This composite structure combines the electrical conductivity and flexibility of the circuit board material with the wear-resistant and low-friction properties of the coating material, thereby resolving the contradiction between maintaining electrical connection and reducing friction-induced 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 support member with an insulation wear-resistant surface prevents wear and short circuits, enhancing the reliability and extending the service life of the flexible circuit board.
Implementation Method 1
a coefficient of friction of the insulation wear-resistant surface of the protection portion is small, so that a surface of the flexible circuit board can be prevented from being worn
Implementation Method 2
the surface of the side of the protection portion that faces the flexible circuit board is an insulation wear-resistant surface... the insulation wear-resistant surface of the protection portion has a good insulation effect, which can avoid a short circuit occurring to the flexible circuit board
Data Source
AI summary
This application provides a rotating shaft mechanism and an electronic device. In a rotating shaft mechanism, at least one of a main shaft and a connecting plate assembly is provided with a support member. The support member is configured to include a support main body and a protection portion, the protection portion is disposed on a surface of a side of the support main body that faces the flexible circuit board, the protection portion covers at least the contact part of the support member, and a surface of a side of the protection portion that faces the flexible circuit board is an insulation wear-resistant surface. In this way, the flexible circuit board is in contact with the insulation wear-resistant surface of the protection portion, so that a surface of the flexible circuit board can be prevented from being worn and occurring a short circuit.