Rotation Shaft Structure for Foldable Display Extrusion Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The service life of flexible displays in foldable electronic devices is shortened due to frequent folding, and maintaining curvature uniformity is challenging, leading to reliability issues.
Innovation Solution
A rotation shaft structure with a main shaft assembly and symmetrically disposed folding assemblies that rotate to form a triangle-like display accommodation space, providing a preset included angle to enclose the display and prevent extrusion, while also unfolding to a flat support surface to avoid partial collapse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display is made larger to provide diversified functions, then the display area increases, but the overall structure becomes larger and less portable
Solution Approach 1:
The patent employs a rotation shaft structure that enables the display to dynamically change between folded and unfolded states. The first and second folding assemblies can rotate relative to the main shaft assembly, allowing the display area to expand when unfolded and compact when folded, thus resolving the contradiction between large display area and portability.
Solution Approach 2:
The rotation shaft structure allows the display to be folded into a compact configuration where parts of the display are nested within each other when not in use. The first and second folding assemblies can be folded toward each other, creating a space-saving configuration that maintains a large display area when needed while improving portability.
2Ease of operation
If the flexible display is frequently folded to enable portability, then the device becomes more portable, but the service life of the display shortens
Solution Approach 1:
The rotation shaft structure is designed with specific curvature deformation requirements for the folded part of the flexible display. By pre-designing the folding geometry and curvature characteristics, the patent protects the display from excessive stress and damage during frequent folding operations, thereby extending its service life while maintaining portability.
Solution Approach 2:
The patent optimizes the curvature parameters of the folded display portion through the rotation shaft design. By controlling the radius of curvature and folding angle, the structure reduces mechanical stress on the flexible display during folding, allowing frequent folding operations without significantly reducing display service life.
3Duration of action of stationary object
If the rotation shaft structure is designed to maintain curvature uniformity, then the service life of the display is prolonged, but the structural complexity increases
Solution Approach 1:
The rotation shaft structure is divided into multiple segments including the main shaft assembly, first folding assembly, and second folding assembly. Each segment can be independently designed and optimized for its specific function, making the overall complex structure more manageable and easier to manufacture while maintaining the required curvature uniformity for display protection.
Solution Approach 2:
The first and second folding assemblies are symmetrically disposed with respect to the main shaft assembly, but each folding assembly has asymmetric internal components (first and second rotation assemblies, support plates, and housing mounting brackets) that are optimized for their specific rotational and sliding movements. This asymmetric design within symmetric overall structure allows for precise control of curvature characteristics.
4Reliability
If the first and second folding assemblies rotate to form a triangle-like display accommodation space, then the display is protected from extrusion, but the device complexity increases
Solution Approach 1:
The rotation shaft structure utilizes three-dimensional spatial configuration to form a triangle-like display accommodation space when the first and second folding assemblies rotate toward each other. This spatial arrangement provides protective clearance for the display in the folded state, preventing extrusion damage while distributing structural complexity across multiple dimensions rather than requiring additional components in a single plane.
Data Source
AI summary
This application provides a rotation shaft structure and an electronic device. The rotation shaft structure includes a main shaft assembly, and two folding assemblies. The folding assembly includes a rotation assembly, a support plate, and a housing mounting bracket. The rotation assembly is rotationally connected to the main shaft assembly. The support plate is rotationally connected to the housing mounting bracket and slidably connected to the rotation assembly. When two housing mounting brackets rotate toward each other, two support plates rotate in a same direction relative to the housing mounting brackets on corresponding sides, so that the two support plates and the main shaft assembly can form a triangle-like display accommodation space. When the electronic device is in a closed state, the display accommodation space can be used for accommodating a bent portion of the flexible display, so that the flexible display is not damaged by extrusion.