Foldable Display Hinge Gear Structure for Zero-Delay Meshing
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Solution Overview
Problem
Gear tolerances in hinge structures can lead to incomplete meshing, resulting in idle rotation and substantial delays between gear rotations, particularly when switching directions, due to small gaps between gear teeth caused by manufacturing processes.
Innovation Solution
A hinge structure with a rotating shaft, idle gears, and interconnecting gears that receive rotational forces in opposite directions, facilitated by pressing members and interconnecting structures, ensuring proper engagement and minimizing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gears are manufactured with tight tolerances to ensure complete meshing, then gear meshing precision is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent introduces an intermediary component (pressing member or spring) between the gears to actively compensate for manufacturing tolerances. This mediator applies corrective force to ensure complete tooth meshing without requiring extremely tight manufacturing tolerances, thus resolving the contradiction between meshing precision and manufacturing complexity
Solution Approach 2:
The patent changes the operational parameters of the gear system by introducing dynamic adjustment mechanisms (pressing members that can be activated) to modify the engagement state. This allows the system to achieve complete meshing through parameter adjustment rather than relying solely on fixed manufacturing precision
2Device complexity
If gear tolerances are relaxed to simplify manufacturing, then manufacturing complexity is reduced, but idle rotation and operational delays increase
Solution Approach 1:
The patent applies preliminary action by pre-positioning pressing members or springs that are ready to compensate for tolerance gaps before operation begins. This preliminary setup ensures that even with relaxed manufacturing tolerances, the gears will engage completely without idle rotation, maintaining reliability while simplifying manufacturing
3Duration of action of moving object
If multiple interworking gears are used to sustain continuous rotation, then rotational continuity is improved, but accumulated idle rotation and operational delay increase
Solution Approach 1:
The patent introduces pressing members as intermediary components that act on each gear in the train, ensuring that each gear-tooth interface maintains complete engagement. This prevents idle rotation at each stage, thereby eliminating accumulated delays across multiple gears while maintaining continuous rotation
Data Source
AI summary
An electronic device is provided. The electronic device includes a first housing, a second housing, a hinge structure configured to connect the first housing and the second housing, and a foldable display module. The hinge structure includes a rotating shaft, a first idle gear, a second idle gear, a first gear, a second gear, a first pressing member configured to move the first gear toward the second gear, and a first interconnecting structure formed between the first gear and the second gear to enable the first gear to engage with the second gear, the first interconnecting structure being formed between the first gear and the second gear such that, as first pressing member moves the first gear toward the second gear, the first gear and the second gear receive with rotational forces in opposite directions.