Foldable Mobile Terminal Rotating Shaft for Display Stability
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Solution Overview
Problem
The challenge of preventing a flexible display in foldable mobile terminals from sliding relative to the housing, causing uneven pressure or tension and potential damage during the folding process.
Innovation Solution
A foldable mobile terminal design featuring a rotating shaft mechanism with two housings and a flexible display embedded between them, where the display is fixedly connected to the housings and rotation parts, allowing it to bend freely without sliding, and includes an accommodating space formed by the rotation parts and main shaft to prevent tension and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the flexible display is embedded into the housing without additional protection, then the device structure is simple, but the flexible display is prone to sliding and experiencing uneven pressure during folding
Solution Approach 1:
A protection component is introduced as an intermediary element between the flexible display and the housing. This protection component includes a protection groove that receives the flexible display and a protection protrusion that fits into the groove, preventing the display from sliding relative to the housing during folding operations.
Solution Approach 2:
The flexible display is nested within the protection groove of the protection component, which itself is nested within the housing structure. This multi-level nesting provides progressive protection while maintaining a compact overall structure.
2Reliability
If the flexible display is fixed rigidly to the housing, then relative sliding is prevented, but the display cannot bend freely causing stress concentration
Solution Approach 1:
The protection component provides localized protection at the critical folding area. The protection groove is positioned specifically at the location where the flexible display is most susceptible to sliding, while other areas of the display maintain their flexibility without additional constraints.
Solution Approach 2:
The flexible display is segmented into different functional zones: a protected segment within the protection groove that maintains stable relative position, and free-bending segments that can flex without constraint. This segmentation allows different parts of the display to have different mechanical properties.
3Strength
If the folding process allows free bending of the display, then stress distribution is improved, but the display may slide relative to the housing causing damage
Solution Approach 1:
The protection component acts as a mediator that enables free bending while preventing sliding. The protection groove provides lateral constraints that prevent sliding, while the flexible display can still bend freely within the groove, and the protection protrusion on the housing provides additional support during the bending process.
Data Source
AI summary
The technology of this application relates to a foldable mobile terminal. The foldable mobile terminal includes a rotating shaft mechanism, two housings, and a flexible display. The flexible display is embedded into the two housings and covers the rotating shaft mechanism. The rotating shaft mechanism has a main shaft and two rotation parts, and the rotation part rotates with the housing on a corresponding side. The flexible display is fixed to the two housings and the two rotation parts. In this way, in a folding or unfolding process of the foldable mobile terminal, relative sliding of the flexible display relative to the two housings and the rotation parts can be avoided, thereby reducing a risk of damaging the flexible display. In addition, a part of the flexible display that is opposite to the main shaft can be bent freely.