FPC Positioning Mechanism With Reduced Z-Stack Height
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Solution Overview
Problem
Current positioning mechanisms for flexible printed circuits (FPCs) in foldable screen mobile phones occupy a large volume due to multiple stacked structures, which is inconsistent with the requirement for a miniaturized design.
Innovation Solution
A positioning mechanism with a simplified structure that includes clamping structures and limiting members to secure the FPC between a base and a limiting member, eliminating the need for additional cover plates, thereby reducing the vertical stack and optimizing the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a traditional positioning mechanism with multiple stacked structures (including cover plates) is used to secure the FPC, then the FPC can be firmly fixed, but the occupied volume in the Z direction increases
Solution Approach 1:
The patent merges the positioning member and limiting member into a single integrated component. The positioning member includes both positioning protrusions and limiting protrusions that directly engage with the FPC, eliminating the need for separate cover plates and reducing the Z-direction stack height while maintaining secure fixation.
Solution Approach 2:
The patent extracts and eliminates unnecessary components (cover plates) from the traditional positioning mechanism. By using only the essential positioning and limiting functions integrated into the positioning member, the design removes redundant structures that occupied Z-direction space.
2Reliability
If multiple stacked structures are used in the positioning mechanism, then the FPC can be securely positioned, but the number of components increases
Solution Approach 1:
Multiple functions (positioning, limiting, securing) are merged into a single positioning member structure. The positioning protrusions and limiting protrusions work together as an integrated system to secure the FPC, reducing component quantity while maintaining reliability.
Solution Approach 2:
The positioning member serves multiple functions simultaneously: it positions the FPC using positioning protrusions, limits movement using limiting protrusions, and provides structural support. This multi-functionality reduces the need for separate specialized components.
3Volume of moving object
If a simplified positioning mechanism without cover plates is used, then the occupied volume is reduced, but the mounting process may become less stable
Solution Approach 1:
The integrated positioning member combines positioning and limiting functions in a way that provides inherent stability during assembly. The direct engagement between positioning protrusions and FPC positioning grooves, along with limiting protrusions and limiting grooves, ensures stable mounting without requiring additional cover plates for structural support.
Data Source
AI summary
This application provides a positioning mechanism, a flexible printed circuit, a flexible printed circuit assembly, and an electronic device. The solution includes a positioning mechanism configured to be arranged on a base. The positioning mechanism includes: at least two positioning members, arranged at intervals on the base along a length direction of the base; and a limiting member, arranged between the two positioning members, where each of the positioning members is provided with an clamping structure, two ends of the limiting member respectively extend to the clamping structures corresponding to the two positioning members, the clamping structure is configured to limit movement of the limiting member in a thickness direction of the base, and a flexible printed circuit is arranged between the limiting member and the base.