Displaceable Rotating Shaft Structure for Foldable Devices
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Solution Overview
Problem
Existing rotating shaft structures in electronic devices face issues with frictional resistance and wear, particularly when opening and closing, leading to limited control over the open angle and reduced service life due to direct torsion force application and circular cross-section designs.
Innovation Solution
A displaceable rotating shaft structure incorporating a support, rotating shaft, connecting rod assembly, guide assembly, and torsion assembly, where the rotating shaft drives the connecting rod assembly to adjust angle and length, utilizing a guide rod and elastic members to minimize friction through a non-circular linking section and notched connecting rods, reducing contact friction area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a circular cross-section rotating shaft with a circular hole connecting rod is used, then the structure is simple to manufacture, but the extension portion cannot drive the connecting rod to rotate and the mechanism lacks friction reduction
Solution Approach 1:
The patent changes the circular cross-section of the rotating shaft extension portion to a non-circular shape (such as rectangular or oval). This asymmetric design enables the extension portion to effectively drive the connecting rod to rotate while reducing friction during operation, resolving the contradiction between manufacturing simplicity and operational effectiveness.
Solution Approach 2:
The patent introduces an elastic pressing mechanism that dynamically adjusts the pressing force on the connecting rod assembly and sliding seat based on operational conditions. This dynamic adjustment reduces frictional resistance during movement while maintaining sufficient contact for effective force transmission, addressing the contradiction between structural simplicity and operational performance.
2Device complexity
If no elastic pressing mechanism is provided, then the structure is simpler, but frictional resistance increases and the support cannot be positioned at desired open angles
Solution Approach 1:
The patent employs an elastic pressing mechanism that dynamically adapts to operational conditions, providing variable pressing forces. This dynamic approach enables precise positioning control and friction management without requiring overly complex mechanical structures, resolving the contradiction between device complexity and operational control.
Solution Approach 2:
The elastic pressing mechanism allows the pressing force parameter to change dynamically during operation, enabling the support to be positioned at various desired open angles while maintaining optimal friction levels. This parameter variability achieves positioning control without proportionally increasing structural complexity.
3Device complexity
If direct torsion force application is used, then the structure is simpler, but wear increases and service life is reduced
Solution Approach 1:
The patent introduces an elastic pressing mechanism as an intermediary between the torsion force application and the connecting rod assembly. This intermediary component distributes and moderates the forces, reducing direct wear on critical surfaces while maintaining structural relative simplicity, thus extending service life.
Solution Approach 2:
The dynamic elastic pressing mechanism adjusts force distribution during operation, preventing excessive concentrated loads that cause wear. This dynamic force management reduces wear on stationary components while maintaining overall structural simplicity, thereby extending service life.
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
This design allows for adjustable distance between rotating shafts with minimal friction resistance, enhancing the service life of the mechanism by reducing wear and enabling precise control over the open angle.
Implementation Method 1
one end of which is connected to the linking section and the other end of which is connected to the support, and the elastic member is configured to elastically press the connecting rod assembly and the sliding seat
Data Source
AI summary
A displaceable rotating shaft structure and a foldable device having the rotating shaft structure are disclosed. The displaceable rotating shaft structure comprises a support, a rotating shaft, a connecting rod assembly, a guide assembly, and a torsion assembly. The support has a supporting portion. The connecting rod assembly has a first outer end that is rotatably connected to the linking section of the rotating shaft and a second outer end that is pivotally connected to the supporting portion. The guide assembly has a guide rod. The guide rod is configured to displace relative to the supporting portion. When the rotating shaft is rotated, the rotating shaft drives the connecting rod assembly to adjust the angle and the total length of a joint of connecting rods of the connecting rod assembly, a distance between the rotating shaft and the support is changed through the guide assembly.