Foldable Display Hinge Structure With Dual Rotational Axes
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Solution Overview
Problem
Existing electronic devices with foldable displays face issues of wrinkle formation and instability during repeated folding due to mismatched rotational axes between the housing and supporting members, leading to potential damage and instability.
Innovation Solution
A hinge structure with a rotary rail and guide rail system, featuring a rotating member with a sliding pin and a supporting member with a sliding opening, allows for distinct rotational axes to stabilize the display folding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the housing and supporting member share the same rotational axis, then the structure is simple, but the display suffers from wrinkle formation and potential damage during repeated folding
Solution Approach 1:
The hinge structure is divided into two independent rotational systems: the housing rotates about a first rotational axis while the supporting member rotates about a second rotational axis. This segmentation allows each component to have its own optimized rotation path, preventing wrinkle formation on the display while maintaining structural manageability through the separate but coordinated hinge mechanisms.
2Stability of the object's composition
If the rotational axis of the housing is fixed, then the structure is stable, but stress is generated by distance change between housing and supporting member causing display damage
Solution Approach 1:
The hinge structure employs dynamic adjustment through two independent rotational axes. The first rotational axis provides stable housing rotation, while the second rotational axis dynamically adjusts the supporting member's position and orientation. This dynamic system compensates for distance changes between housing and supporting member, eliminating stress concentration on the display during folding operations.
3Object-affected harmful factors
If the rotational axis of the housing is changed or variable, then display damage is reduced, but rotation of the housing becomes unstable during folding
Solution Approach 1:
The rotational functionality is segmented into two independent axes: the first rotational axis maintains stable housing rotation, while the second rotational axis on the supporting member provides the necessary angular adjustment to reduce display damage. This segmentation allows stability and damage reduction to be achieved simultaneously through coordinated but independent rotational movements.
Data Source
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AI summary
According to an embodiment, an electronic device includes a first housing, a second housing, a hinge structure rotatably connecting the first housing and the second housing, and a display disposed across the hinge structure, the hinge structure includes a rotary rail, a hinge bracket including a guide rail spaced apart from the rotary rail, a sliding pin, a rotating member coupled to the first housing, a sliding opening, a guide groove, and a supporting member supporting one surface of the display,.