Foldable Screen Hinge Transmission for Crease Prevention
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Solution Overview
Problem
Flexible screens in foldable electronic devices are prone to damage during folding due to excessive stretching or creasing, leading to a shortened service life.
Innovation Solution
An electronic device design featuring a shaft assembly with a transmission member that slides along guide surfaces to manage the movement of screen assemblies, preventing excessive stretching and creasing by guiding the screen assembly sections during folding and unfolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the foldable electronic device is folded inwards with a small bending radius at the hinge position, then the device can be compactly folded, but the flexible screen is creased or damaged due to excessive squeezing
Solution Approach 1:
The screen assembly is designed to dynamically change its position relative to the housing during folding. The screen assembly includes a screen that can move between a first position (when unfolded) and a second position (when folded), allowing the screen to adapt its configuration based on the folding state to avoid damage while maintaining compact folded size
Solution Approach 2:
The display area is segmented into multiple sections (first display section, second display section, third display section) that can move independently relative to each other. This segmentation allows different parts of the screen to be positioned optimally during folding, preventing creasing and damage at the hinge area
2Area of moving object
If the foldable electronic device is folded outwards with a large bending radius at the hinge position, then the device can be fully unfolded for display, but the flexible screen is excessively stretched and deformed, or even cracked
Solution Approach 1:
The screen assembly dynamically adjusts its configuration based on the folding state. When unfolded, the screen moves to the first position to maximize display area; when folded, it moves to the second position to prevent stretching. This dynamic adaptation ensures both full display capability and screen protection
Solution Approach 2:
The screen assembly is positioned in advance to prevent stretching before the folding action occurs. By pre-positioning the screen at appropriate locations relative to the housing sections, the design prevents excessive stretching and deformation before they can occur during the folding process
3Device complexity
If the screen assembly is fixed relative to the housing, then the structure is simple, but the screen is damaged easily during folding process
Solution Approach 1:
Instead of a fixed screen assembly, the design employs a dynamic screen assembly that can move between different positions relative to the housing. This movement capability, enabled by the connection between housing sections and screen assembly, allows the screen to avoid damage during folding while maintaining relatively simple overall structure
Data Source
AI summary
An electronic device is disclosed. The electronic device includes a first housing, a second housing, a screen assembly, a shaft assembly, and a transmission member. The first housing and the second housing are in rotational fit with each other through the shaft assembly. The transmission member sleeves on the shaft assembly. The transmission member is capable of moving in an axial direction of the shaft assembly. The first housing is provided with a first pushing portion. The transmission member is provided with a first guide surface. The first pushing portion is abutted on the first guide surface. A first section and a second section of the screen assembly are disposed in the first housing and the second housing, respectively.