Biaxial Hinge Side-Face Riveting for Thinner Mobile Terminals
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Solution Overview
Problem
Current biaxial hinge mechanisms in portable electronic products, such as notebook computers, face challenges in reducing thickness while maintaining performance due to their complex structure.
Innovation Solution
A biaxial hinge mechanism with parallel shafts and supports, utilizing integrated riveting columns, synchronization gears, and torsion members to optimize space utilization and connection strength, allowing for reduced thickness and high rotating torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional biaxial hinge structure is used, then connection strength is ensured, but thickness cannot be reduced
Solution Approach 1:
The patent changes the connection direction from the thickness direction (traditional) to the side face direction (parallel to thickness). The riveting columns extend along the side faces of the shafts rather than through the thickness, allowing thin-profile design while maintaining connection strength through lateral attachment.
Solution Approach 2:
The riveting columns are designed with grooves at their ends that engage with corresponding protrusions on the shafts before final assembly. This preliminary engagement prevents misalignment and ensures proper positioning, preventing assembly errors that could compromise connection strength.
2Strength
If integrated riveting columns are used, then connection strength is improved, but manufacturing complexity increases
Solution Approach 1:
The riveting columns are formed as integrated components with the supports, combining what could be separate parts into a single manufactured element. This integration reduces the number of assembly steps and fasteners while maintaining connection strength, actually simplifying the overall manufacturing process despite the complex geometry of the riveting columns themselves.
3Length of moving object
If space is maximized on side faces, then thickness is reduced, but connection area is limited
Solution Approach 1:
Instead of increasing connection area in the thickness direction (which would increase overall thickness), the patent extends the riveting columns along the side faces (parallel to thickness). This transfers the connection area development to a different dimension, allowing thin-profile design while achieving sufficient connection area through lateral extension.
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 reduces the thickness of mobile terminals by maximizing space utilization on the hinge's side faces, achieving a high connection strength and rotating torque of over 3.5 kg/cm with a small outer diameter, while maintaining performance.
Implementation Method 1
the first riveting column is connected to the first connection through hole; the second riveting column is connected to the second connection through hole
Implementation Method 2
The synchronization mechanism comprises a first gear and a second gear respectively connected to the first shaft and the second shaft
Implementation Method 3
The biaxial hinge mechanism is further provided with a torsion member
Data Source
AI summary
Disclosed is a biaxial hinge mechanism used on a mobile terminal, comprising a first shaft and a second shaft parallel to each other, and a first support and a second support, wherein the first and second supports are respectively connected to the connection ends of the first and second shafts; the first and second supports are provided with connection end faces facing side faces of the connection ends; riveting columns formed in an integrated manner are provided on the connection end faces; connection through holes are provided on the connection ends; and the riveting columns are connected to the connection through holes. The spaces of the side faces of the hinge, rather than the spaces in the thickness direction of the hinge, are fully used to connect the supports, providing a high space utilization rate and aiding in greatly reducing the thickness of the hinge, and the used connection structure facilitates installation of the supports on the side faces of the hinge, providing a high connection strength. A relatively large rotating torque can be realized by the relatively small size, for example, the torque can reach over 3.5 kg·cm with the overall outer diameter within 3.3 mm.