Sequential Multi-Axis Hinge for Tipping and Display Bounce Control
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Solution Overview
Problem
Computing devices with hinged portions, such as tablets and touch screens, face issues with stability and user experience due to tipping and display bounce when transitioning between open and closed positions, particularly when additional processing power and input capabilities are required.
Innovation Solution
A sequential multi-axis hinge assembly that includes articulating hinge covers, friction bands, and sequencing assemblies to control the relative order and extent of rotation around individual axes, providing stability and reducing tipping by creating a larger footprint and preventing display bounce through controlled friction and sequential rotation mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hinge assembly allows rotation between open and closed positions, then flexibility and adaptability are improved, but stability deteriorates due to tipping and display bounce
Solution Approach 1:
The hinge assembly is divided into multiple independent hinge units, each capable of rotation around a specific axis. This segmentation allows controlled sequential rotation while maintaining overall structural stability, resolving the contradiction between flexibility and stability.
Solution Approach 2:
Friction bands are introduced as intermediary elements between the hinge units and housing. These friction bands provide controlled resistance to rotation, acting as mediators that enable smooth transitions while preventing unwanted movement and bounce, thus maintaining stability during flexible operation.
2Stability of the object's composition
If friction bands are added to control rotation, then display bounce is reduced, but device complexity increases
Solution Approach 1:
The friction bands are nested within the hinge assembly structure, integrated into the existing housing and hinge units. This nesting approach allows the friction control mechanism to be incorporated without significantly increasing external dimensions or overall device complexity.
Solution Approach 2:
The friction bands are designed to automatically engage and disengage based on the hinge position and rotation direction. This self-regulating mechanism eliminates the need for additional control systems, motors, or sensors, thereby controlling display bounce without proportionally increasing device complexity.
3Stability of the object's composition
If sequential multi-axis rotation is implemented, then stability during transition is improved, but manufacturing precision requirements increase
Solution Approach 1:
The rotation sequence is segmented into discrete steps, with each hinge unit rotating around its own axis in a predetermined order. This segmentation simplifies the control mechanism and reduces the precision requirements compared to simultaneous multi-axis rotation, as each unit can be manufactured and assembled independently.
Solution Approach 2:
The friction bands serve as intermediaries that naturally regulate the rotation sequence through their friction characteristics. This passive control mechanism reduces the need for precision mechanical stops, springs, or electronic sensors, thereby lowering manufacturing precision requirements while maintaining stable transitions.
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
Enhances user experience by stabilizing the device, reducing the likelihood of tipping, and minimizing display bounce, allowing for seamless transitions between tablet and laptop-like configurations while maintaining flexibility and convenience.
Implementation Method 1
friction bands to control the relative order and extent of rotation around individual axes
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B
AI summary
Technologies are described relating to sequential multi-axis hinges that rotatably secure portions of a computing device. One example can include a set of hinges that rotate around a set of hinge shafts. The example can also include a shuttle cam through which an individual hinge shaft passes. The shuttle cam can be configured to move orthogonally relative to the individual hinge shaft to block rotation of the individual hinge shaft or an adjacent individual hinge shaft.