Flexible Circuit Board Regular Bending Structure for Mobile Terminal
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Solution Overview
Problem
Flexible circuit boards in mobile terminals are prone to damage due to irregular movement and stress concentration, leading to a shortened service life when used in sliding or bendable structures.
Innovation Solution
A mobile terminal design that incorporates a flexible circuit board with a regular bending structure, enhanced by stiffening plates and a connection structure that accommodates redundant parts, maintaining a stable bending shape through controlled movement and placement of stiffening plates between bending parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible circuit board is used in a sliding or bendable structure, then the mobile terminal achieves structural flexibility and movement capability, but the flexible circuit board is prone to irregular movement and stress concentration, leading to damage and shortened service life
Solution Approach 1:
The flexible circuit board is pre-bent into a regular bending structure with multiple bending parts before being installed in the mobile terminal. This preliminary shaping ensures that when the terminal moves or bends, the circuit board follows a predetermined safe bending path, preventing irregular movement and stress concentration that would otherwise lead to damage
Solution Approach 2:
The flexible circuit board is designed with a regular bending structure consisting of multiple bending parts that create a curved, S-shaped configuration. This curvature design allows the circuit board to accommodate the movement and bending of the terminal while maintaining controlled stress distribution, preventing the irregular movement that causes damage
2Adaptability or versatility
If the flexible circuit board is made more flexible to accommodate movement, then the mobile terminal achieves better bendability, but the circuit board becomes more susceptible to stress concentration and damage
Solution Approach 1:
The flexible circuit board is divided into multiple segments or bending parts along its length. Each bending part can independently flex and deform, distributing the stress across multiple locations rather than concentrating it at a single point. This segmentation maintains bendability while enhancing resistance to stress concentration and damage
Solution Approach 2:
The circuit board is shaped into a regular bending structure with multiple curved bending parts. This curvature design allows the board to flex smoothly during terminal movement, distributing mechanical stress across the curved surfaces and preventing the sharp stress concentrations that occur in straight, rigid configurations
Data Source
AI summary
The mobile terminal includes a first part, a second part, a connection structure, and a flexible circuit board. A signal is transmitted between the first part and the second part through the flexible circuit board. The flexible circuit board includes a first end and a second end. The first end is electrically connected to the first part, and the second end is electrically connected to the second part. The flexible circuit board passes through the connection structure, and a part of the flexible circuit board in the connection structure maintains a regular bending structure.