Multiaxial Hinge with Synchronous Rotation for Foldable Display Closure
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Solution Overview
Problem
Multiaxial hinge devices struggle to maintain a stable closed state of electronic devices with flexible display sheets, often resulting in creases or sags due to large repulsive forces and low attaching accuracy, which affects the device's ability to support its own weight and maintain a closed position.
Innovation Solution
A multiaxial hinge device with a synchronous rotation mechanism, urging mechanism using compression coil springs, and tension adjusting mechanism, which includes a base plate, front and rear side plates, attaching plates, and hinge pins, allowing for synchronized rotation and tension adjustment to maintain the closed state and prevent creases or sags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the flexible display sheet has a large repulsive force, then the display sheet can maintain its curved shape, but it pushes to open the first and second casings, preventing the closed state from being maintained
Solution Approach 1:
The urging mechanism applies a closing force in advance to counteract the repulsive force of the curved flexible display sheet before the casings can open, thereby maintaining the closed state stability
2Ease of manufacture
If the flexible display sheet has low attaching accuracy, then the attachment process is easier, but creases or sags are produced on the flexible display sheet in closed state
Solution Approach 1:
The urging mechanism provides a closing force in advance to compensate for potential attaching inaccuracies, preventing creases or sags from forming on the flexible display sheet when the casings are closed
3Stability of the object's composition
If the multiaxial hinge device uses a synchronous rotation mechanism with urging mechanism, then the closed state can be maintained, but the device complexity increases
Solution Approach 1:
The synchronous rotation mechanism dynamically coordinates the rotation of front and rear side plates through cam followers and compression coil springs, enabling closed state maintenance while managing complexity through synchronized motion control
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 effectively maintains a stable closed state of the electronic device, supports the device's weight under large repulsive forces, and minimizes creases or sags on the flexible display sheet, enhancing the operability and structural integrity of the hinge mechanism.
Implementation Method 1
compression coil springs compressed in the front and rear direction along the base plate
Implementation Method 2
urging mechanism comprises compression coil springs compressed in the front and rear direction along the base plate, and a pair of slide cams provided on both ends of the compression coil spring
Implementation Method 3
a pair of slide cams provided on both ends of the compression coil spring, and a pair of cam followers provided on the front side plate and the rear side plate to slide the slide cams and compress the compression coil spring in the front and rear direction as these rotate
Data Source
AI summary
A multiaxial hinge that can smoothly realize and stably maintain a closed state of the first and the second casings and provide a multiaxial hinge in which creases or sags are hardly produced on the flexible display sheet in a closed state of the first and the second casings constructed to form space capable of accommodating a folded portion of the flexible display sheet folded when the first casing and the second casing are closed between the base plate on one hand and the front side plate and the rear side plate on the other is disclosed.