Segmented Main Swing Arm Rotating Mechanism for Foldable Display Support
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Solution Overview
Problem
Current rotating shaft mechanisms in foldable mobile terminals lack sufficient stability for supporting the floating plate, leading to instability of the flexible display during folding and unfolding, as the main swing arms have a large center angle to prevent sliding out, resulting in unsupported or poorly supported floating plates between them.
Innovation Solution
A main swing arm design with a rotating body featuring a first and second rotating segment, where the first segment is partially located in the slide in the folded state and the second segment supports the floating plate in the unfolded state, and additional support structures like first and second support blocks on the auxiliary swing arm enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the center angle of the arc-shaped segment is increased to prevent sliding out during folding, then the reliability of the swing arm connection is improved, but the floating plate support stability deteriorates because the inner edge position becomes higher than the floating plate when unfolded
Solution Approach 1:
The rotating body is divided into two functional segments: a first rotating segment that engages with the slide during folding to ensure reliable connection, and a second rotating segment that extends to support the floating plate when unfolded. This segmentation allows each part to optimize its function independently, resolving the contradiction between connection reliability and plate support stability.
Solution Approach 2:
Different parts of the rotating body are given different functional properties: the first rotating segment is designed for sliding engagement with the support, while the second rotating segment is designed to contact and support the floating plate. This local differentiation of quality allows the structure to simultaneously achieve reliable folding connection and stable plate support.
2Ease of manufacture
If the main swing arms are disposed symmetrically on both sides, then the ease of manufacture is improved, but the floating plate support stability deteriorates because no floating plate is disposed between the two main swing arms or the disposed plate is not supported
Solution Approach 1:
The second rotating segment serves multiple functions: it maintains the symmetrical configuration for ease of manufacture while simultaneously providing support for the floating plate. This multi-functionality resolves the contradiction by making the same structural element serve both manufacturing simplicity and support stability requirements.
Data Source
AI summary
Disclosed are a main swing arm, a rotating shaft mechanism, and a foldable mobile terminal. The rotating shaft mechanism provided in embodiments of this application is mainly applied to a foldable mobile terminal, so as to implement unfolding and folding of two main parts of the mobile terminal. A rotating body used by a main swing arm to cooperate with a slide of a support to slide includes a first rotating segment and a second rotating segment. In a folded state, the first rotating segment is not separated from the slide of the support, and the second rotating segment can meet a requirement of supporting a floating plate in an unfolded state in a screen supporting position, and an inner end of the first rotating segment can be accommodated in an opening of a floating plate and does not interfere with the floating plate.