Foldable Hinge Assembly With Segmented Damping for Large-Angle Hovering
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Solution Overview
Problem
Foldable terminal products face challenges in achieving large-angle hovering while ensuring the service life of the cam, as changes in surface shape to enhance damping force lead to reduced cam longevity.
Innovation Solution
A foldable assembly design with a first sliding groove featuring different speed segments and a damping assembly that transitions through multiple resistance states, allowing for matching speeds between main and torsion swing arms to extend the hovering range to 30° to 150°, while maintaining cam durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the surface shape of the cam is changed to increase damping force, then the damping force is improved, but the service life of the cam is reduced
Solution Approach 1:
The sliding groove is divided into multiple segments with different slope characteristics (first acceleration segment, first gentle speed segment, second acceleration segment, second gentle speed segment). Each segment provides different damping characteristics, allowing the system to achieve sufficient damping force through the combined effect of multiple segments rather than requiring a single aggressive cam profile change.
Solution Approach 2:
The damping assembly transitions between different resistance states (first resistance state, second resistance state, third resistance state) as the first shaft moves through different segments of the sliding groove. This dynamic adjustment of resistance provides adaptive damping that maintains cam service life while ensuring adequate damping force at different positions.
2Force
If the surface profile of the cam is changed to increase climbing amount and climbing angle, then the damping force is improved, but the service life of the cam is shortened
Solution Approach 1:
The sliding groove is segmented into four distinct segments with varying slope characteristics. The gentle speed segments provide extended low-speed travel that increases the effective climbing distance without requiring aggressive cam profile changes, thereby maintaining cam service life while achieving sufficient damping force.
Solution Approach 2:
The system changes the resistance parameter dynamically as the first shaft moves through different segments. The damping assembly transitions between resistance states based on position, allowing the system to achieve increased climbing amount through parameter variation rather than through aggressive geometric changes to the cam profile.
3Speed
If the first shaft moves through the sliding groove with varying slopes, then the speed matching between main swing arm and torsion swing arm is improved, but the structural complexity is increased
Solution Approach 1:
The damping assembly serves multiple functions: it provides damping force, enables speed matching between swing arms, and transitions through different resistance states based on position. This multi-functionality achieves speed matching without requiring separate dedicated mechanisms, thereby limiting the increase in structural complexity.
Solution Approach 2:
The system uses dynamic transition between resistance states to achieve speed matching. The damping assembly adapts its resistance characteristics as the first shaft moves through different segments, enabling speed matching through dynamic parameter adjustment rather than through complex mechanical linkages.
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 solution enables the foldable assembly to hover at larger angles with prolonged damping, enhancing user experience and extending the cam's service life by maintaining optimal damping force throughout various rotational stages.
Implementation Method 1
a damping assembly, where the damping assembly is connected to the second end, when the first torsion swing arm rotates relative to the damping assembly
Implementation Method 2
a first sliding groove, the first sliding groove includes a first acceleration segment and a first gentle speed segment connected to each other
Data Source
AI summary
This application provides a foldable assembly and an electronic device. The foldable assembly includes a first main swing arm, a first torsion swing arm, a first shaft, and a damping assembly. The first main swing arm is provided with a first sliding groove. The first sliding groove includes a first acceleration segment and a first gentle speed segment connected to each other. An absolute value of a slope of the first acceleration segment is greater than an absolute value of a slope of the first gentle speed segment. The first torsion swing arm includes a first end and a second end. The first shaft passes through the first end and the first sliding groove, and connects the first torsion swing arm and the first main swing arm. The damping assembly is rotatably connected to the second end.