Foldable Hinge Mechanism for Precise 180° Screen Unfolding
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Solution Overview
Problem
Existing foldable electronic devices face challenges in accurately adjusting the angle in the unfolded state, leading to deviations from the desired 180° configuration, which affects the appearance consistency and reliability of the flexible display.
Innovation Solution
A folding mechanism with a main shaft, fastening brackets, rotating members, and support plates, utilizing interference fits and damping members to precisely control the angle between support plates and the main shaft, ensuring a consistent 180° unfold and adjustable screen-accommodating space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional folding mechanism is used, then the device can achieve foldable functionality, but the angle adjustment precision in unfolded state deviates from 180°
Solution Approach 1:
The patent applies parameter changes by utilizing interference fit between the first fitting surface of the first connecting arm and the second fitting surface of the first support plate. This interference fit generates acting force that controls the angle between the first support plate and the main shaft, adjusting it to 180° in the unfolded state. By changing the physical state from normal fit to interference fit, the mechanism achieves precise angle control and eliminates angular deviation, thereby improving both manufacturing precision and display appearance consistency.
2Measurement precision
If interference fit is applied between connecting arm and support plate, then angle control precision improves, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the angle control function into separate components: the first connecting arm with its first fitting surface, the first support plate with its second fitting surface, and the main shaft. This segmentation allows each component to be manufactured independently with standard tolerances, while the interference fit between specific surfaces provides the precise angle control. This approach reduces overall manufacturing complexity compared to requiring the entire assembly to be precision-crafted as a single unit.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mechanism ensures accurate angle adjustment, maintaining a 180° unfold state for consistent display appearance and enhancing reliability by controlling the interference fit and damping forces, thereby improving user experience and device stability.
Implementation Method 1
the first fitting surface of the first connecting arm is in interference fit with the second fitting surface of the first support plate, so that the first support plate generates acting force in a movement direction
Data Source
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AI summary
This application provides a folding mechanism and an electronic device. The folding mechanism includes a main shaft, a first fastening bracket, a second fastening bracket, a first rotating member, a second rotating member, a first support plate, a second support plate, and a first connecting arm. The first rotating member movably connects the main shaft to the first fastening bracket, and the second rotating member movably connects the main shaft to the second fastening bracket. The first support plate movably connects the first fastening bracket to the first rotating member, and the second support plate movably connects the second fastening bracket to the second rotating member. The first connecting arm movably connects the first fastening bracket to the main shaft, the first connecting arm has a first fitting surface, the first support plate has a second fitting surface, and when the folding mechanism is in an unfolded state, the first fitting surface of the first connecting arm is in interference fit with the second fitting surface of the first support plate, so that an angle between the first support plate and the main shaft is controlled through acting force between the first fitting surface and the second fitting surface, and the angle between the first support plate and the main shaft is equal to 180° as much as possible.