Foldable Hinge Shaft Mechanism With Arc-Sliding Swing Arms
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Solution Overview
Problem
Foldable electronic devices face challenges in reducing size due to interference between the foldable mechanism and the flexible display screen, hindering further lightening and thinning.
Innovation Solution
A rotating shaft mechanism with arc-shaped sliding portions and fit portions allows for differential rotation angles of swing arms relative to the base, reducing interference and enabling a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the foldable mechanism uses a traditional rigid connection between swing arms and connectors, then the structure is simple and easy to manufacture, but the mechanism size cannot be reduced and interference with the flexible display screen occurs
Solution Approach 1:
The patent applies the dynamics principle by replacing the traditional rigid connection between swing arms and connectors with a dynamic arc-shaped sliding connection. The arc-shaped sliding portion on the swing arm slides along the arc-shaped sliding fit portion on the connector, allowing the connection point to move dynamically during rotation. This dynamic connection enables differential rotation angles between the swing arm and connector, reducing the mechanism size and preventing interference with the flexible display screen while maintaining structural simplicity.
2Object-affected harmful factors
If the swing arm and connector rotate by the same angle, then the rotation mechanism is simple, but interference with the flexible display screen occurs in folded state
Solution Approach 1:
The arc-shaped sliding connection creates a dynamic rotation control system where the swing arm and connector can rotate by different angles. As the swing arm rotates, the arc-shaped sliding portion moves along the arc-shaped sliding fit portion, automatically adjusting the rotation angle of the connector relative to the swing arm. This dynamic angle adjustment prevents the swing arm from interfering with the flexible display screen in the folded state while keeping the rotation control mechanism simple and passive.
Solution Approach 2:
The patent uses the spheroidality principle by employing arc-shaped sliding portions and fit portions instead of linear or rigid connections. The curved geometry of the arc-shaped components enables the differential rotation mechanism, as the arc shape naturally guides the relative motion between the swing arm and connector. This curved connection allows the mechanism to achieve different rotation angles for the swing arm and connector, preventing interference with the display screen while maintaining a simple structural design.
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 minimizes interference between the foldable mechanism and the display screen, facilitating a smaller and lighter foldable electronic device design.
Implementation Method 1
a first arc-shaped sliding portion slidably fits the first arc-shaped sliding fit portion, so that the first swing arm is rotatably connected to the connector
Data Source
AI summary
Embodiments of this disclosure provide a rotating shaft mechanism and a terminal device. The rotating shaft mechanism includes a bottom base, at least two connectors, and at least two first swing arms, where the connectors are respectively arranged on two sides of the bottom base; and the first swing arms are respectively arranged on the two sides of the bottom base, and the first swing arms are rotatably connected to the bottom base. In the first swing arm and the connector located on the same side of the bottom base, a first arc-shaped sliding portion is arranged on the first swing arm, a first arc-shaped sliding fit portion is arranged on the connector, and the first arc-shaped sliding portion slidably fits the first arc-shaped sliding fit portion, so that the first swing arm is rotatably connected to the connector.