Rotating Mechanism for Foldable Display Terminal Screen Stress

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Solution Overview

Problem

Foldable display terminals with flexible screens face issues due to pulling forces during folding or unfolding, which can damage the screen and affect user experience.

Innovation Solution

A rotating mechanism is introduced, comprising a rotating shaft, mechanical parts with slide grooves, and elastic components. This mechanism allows for sliding connections between mechanical parts, reducing pulling forces on the flexible screen and improving its flatness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a rotating mechanism is used to enable folding and unfolding of the flexible screen, then the display terminal can achieve large display area and small volume, but the rotating mechanism generates pulling force on the flexible screen causing damage and affecting user experience

Engineering Contradiction:
Improvefolding and unfolding capabilityVSAvoidpulling force on flexible screen
Core Design Contradiction:
Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

A rotating mechanism is introduced as an intermediary component between the flexible screen and the housing. This mechanism includes a rotating shaft, first and second mechanical parts, and third and fourth mechanical parts with sliding connections, which mediates the folding and unfolding motion to reduce direct pulling force on the flexible screen.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The rotating mechanism employs dynamic sliding connections between mechanical parts. The third mechanical part slides in the first slide groove, and the fourth mechanical part slides in the second slide groove, allowing the mechanism to adapt dynamically during rotation and reduce stress on the flexible screen.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If the rotating mechanism rotates the first mechanical part and second mechanical part around the rotating shaft, then folding and unfolding motion is achieved, but pulling force on the flexible screen increases causing flatness degradation

Engineering Contradiction:
Improvefolding and unfolding motionVSAvoidflatness of flexible screen
Core Design Contradiction:
Ease of operationVSShape

Solution Approach 1:

The rotating mechanism serves as an intermediary that transforms the folding and unfolding motion into a form that reduces direct pulling on the flexible screen. The sliding connections between mechanical parts act as intermediaries to distribute and reduce the force transmitted to the screen.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The dynamic sliding connections allow the mechanical parts to move relative to each other during rotation, adapting the force distribution to maintain better flatness of the flexible screen throughout the folding and unfolding process.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS12292763B2Rotating mechanism and foldable display terminal
Publication Date: 2025.05.06 HUAWEI TECH CO LTD
  • US12292763B2 patent drawing
  • US12292763B2 patent drawing
  • US12292763B2 patent drawing

AI summary

A rotating mechanism includes: a rotating shaft; a first mechanical part, where the first mechanical part is provided with a first slide groove; a second mechanical part, where the second mechanical part is provided with a second slide groove; a third mechanical part, where the third mechanical part is disposed in the first slide groove, and one end of the third mechanical part is rotatably connected to the rotating shaft; and a fourth mechanical part, where the fourth mechanical part is disposed in the second slide groove, and one end of the fourth mechanical part is rotatably connected to the rotating shaft. When the first mechanical part and the second mechanical part rotate around the rotating shaft, the third mechanical part slides with respect to the first slide groove.