Rotating Shaft Mechanism With Length Maintenance for Foldable Displays
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Solution Overview
Problem
Flexible displays in foldable electronic devices are prone to deformation and damage due to uneven pressure or pulling forces during folding, which affects their service life and reliability.
Innovation Solution
A rotating shaft mechanism with a length maintaining mechanism and main shaft assembly, featuring swing arms, sliding blocks, and connecting assemblies, which stabilize the movement of the flexible display by adjusting the distance between housing components, preventing squeezing or pulling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the flexible display is folded to enable portability, then the electronic device becomes more compact and portable, but the flexible display is subjected to uneven pressure or pulling force that causes deformation and damage
Solution Approach 1:
The patent introduces a length maintaining mechanism with swing arms, sliding blocks, and connecting assemblies that act as a cushioning system before the flexible display is damaged. This mechanism maintains the distance between housing components during folding, preventing uneven pressure and pulling forces from deforming or damaging the flexible display, thus protecting it in advance during the folding process
2Reliability
If a rigid support structure is used to maintain display shape, then the flexible display is protected from deformation, but the device complexity increases
Solution Approach 1:
The patent employs a dynamic length maintaining mechanism with swing arms that can rotate and sliding blocks that can move along guide rails, rather than a static rigid support. This dynamic structure adapts to the folding motion, maintaining the distance between housing components through controlled movement of its own parts, which reduces overall device complexity while ensuring flexible display stability
Solution Approach 2:
The length maintaining mechanism is segmented into multiple independent components: swing arms, sliding blocks, connecting assemblies, and guide rails. Each component performs a specific function (rotation, sliding, connecting), and their coordinated operation maintains the distance between housing components. This segmentation allows for easier manufacturing, assembly, and maintenance while achieving the goal of flexible display protection
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 mechanism enhances the stability and reliability of the flexible display by preventing deformation and extending its service life, while maintaining a compact design.
Implementation Method 1
The swing rod may be accommodated in the sliding slot, and may slide in the sliding slot in a direction toward or away from the fastening member
Implementation Method 2
an end that is of the swing rod and that is away from the fastening member may be rotatably connected to the fastening member. The connecting assembly may also be rotatably connected to the fastening member
Implementation Method 3
in a process in which the connecting assembly rotates relative to the fastening member, the support plate may be driven to move in a direction toward or away from the fastening member
Data Source
AI summary
A rotating shaft mechanism (1) includes a length maintaining mechanism (1a) and a main shaft assembly (1b). The length maintaining mechanism (1a) includes a fastening member (101) and two swing arms (102, 103), and the two swing arms (102, 103) are rotatably connected to the fastening member (101). The swing arm includes a sliding block (1021), a swing rod (1022), and a connecting assembly (1023), and the swing rod (1022) may slide along the sliding block (1021). The swing rod (1022) is rotatably connected to the fastening member (101), and the connecting assembly (1023) is also rotatably connected to the fastening member (101). When the swing rod (1022) rotates relative to the fastening member (101), the connecting assembly (1023) may be driven to rotate around the fastening member (101). The main shaft assembly (1b) includes a cover plate (105).