Foldable Display Hinge Mechanism With Telescopic Sliding Arms
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Solution Overview
Problem
Existing hinge mechanisms for foldable electronic devices often compromise the reliability of the overall structure by thinning components to avoid interference with flexible displays, leading to a risk of damaging the display during rotation.
Innovation Solution
A hinge mechanism with a base and main hinge module featuring rotating components with non-coincident axes, sliding grooves, and arc-shaped slots, which allows for telescopic motion and reduced rotation angles to stabilize the display in both unfolded and folded states, preventing squeezing and enhancing structural reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If components of the hinge mechanism are thinned to avoid interference with the flexible display, then the flexibility and foldability are improved, but the structural reliability deteriorates
Solution Approach 1:
The patent implements dynamic motion trajectories for the support arm and swing arm through non-coincident rotation axes. The support arm rotates around a first rotation axis while the swing arm rotates around a second rotation axis that does not coincide with the first, creating a dynamic telescopic motion that adapts to the flexible display's folding requirements without requiring thin-walled components
Solution Approach 2:
The patent introduces sliding grooves that extend in different directions (first direction for support arm, second direction for swing arm) to add dimensional complexity to the motion control. This multi-directional sliding mechanism enables the arms to follow complex three-dimensional trajectories, achieving display accommodation without compromising structural thickness
2Adaptability or versatility
If components are thinned to accommodate rotation, then the foldable function is achieved, but the risk of damaging the flexible display increases
Solution Approach 1:
The patent performs preliminary action by pre-configuring the non-coincident rotation axes and multi-directional sliding grooves to establish controlled motion trajectories before the folding operation begins. This pre-planned kinematic path ensures that the support and swing arms move in a manner that prevents squeezing or damaging the flexible display during the folding process
Solution Approach 2:
The patent changes the kinematic parameters of the hinge mechanism by using non-coincident rotation axes instead of coincident ones. This parameter change fundamentally alters the motion trajectory, transforming it from a simple rotational path to a controlled telescopic path that accommodates the display without causing damage
3Reliability
If non-coincident rotation axes are used, then the telescopic motion and display accommodation are achieved, but the device complexity increases
Solution Approach 1:
The patent segments the hinge mechanism into distinct functional components: a support arm with its own rotation axis and sliding groove, and a swing arm with its own rotation axis and sliding groove. This segmentation allows each component to be optimized independently for its specific motion control function, managing complexity through modular design
Solution Approach 2:
The patent introduces sliding grooves as intermediary elements between the rotation axes and the final motion output. These grooves act as mediators that convert the rotational motion into the desired telescopic motion, simplifying the direct relationship between the non-coincident axes and the arm movements
Data Source
AI summary
A hinge mechanism includes a base and two rotating components. Each rotating component includes a support arm, a swing arm, and a housing mounting bracket. The two support arms are respectively disposed on two sides of the base and are rotatably connected to the base. The two swing arms are respectively disposed on two sides of the base and are rotatably connected to the base. Each of the two housing mounting bracket is provided with two sliding grooves. For a support arm, a swing arm, and a housing mounting bracket that are located on a same side of the base, the support arm and the swing arm may separately slide in a sliding groove, and projections of sliding directions of the support arm and the swing arm are not parallel in a reference plane perpendicular to the rotation axes of the support arm and the swing arm.