Laptop Hinge Friction Control via Segmented Arched Strip
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Solution Overview
Problem
Existing laptop computer hinges face issues with inconsistent friction due to fatigue in the arched strip, leading to poor pivoting mechanics and slow manufacturing processes.
Innovation Solution
A hinge design featuring a first connector with a root and socket, a lining that prevents rotation, a bush with a robust sleeve and positioning device, and a second connector with a shaft and plate, providing controlled friction and durability through powder metallurgy manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an arched strip is used to provide friction for pivoting control, then the hinge can maintain the display at different angles, but the arched strip becomes slack due to fatigue over time, reducing friction and control reliability
Solution Approach 1:
The arched strip is divided into multiple segmented strips that can independently deform and absorb fatigue stress. Each segment can flex separately, preventing the entire structure from becoming slack and maintaining consistent friction contact with the shaft throughout the service life.
2Ease of manufacture
If traditional bending and CNC lathe methods are used to fabricate the arched strip, then the hinge can be manufactured with traditional processes, but the manufacturing speed is slow and productivity is low
Solution Approach 1:
The manufacturing method transitions from traditional mechanical processes to injection molding, changing the fundamental manufacturing parameter from subtractive shaping to additive forming. This enables high-speed production while maintaining design flexibility, as the segmented strip geometry can be directly formed in the mold.
3Force
If the arched strip is made tight around the shaft for strong friction, then pivoting control is improved, but the friction may be insufficient when the strip becomes slack, leading to inconsistent performance
Solution Approach 1:
The segmented strip structure dynamically adapts to the shaft during pivoting operations. As the display moves, the segments flex and maintain consistent contact pressure with the shaft, ensuring stable friction force throughout the range of motion and eliminating the slack condition that causes inconsistent performance.
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 design ensures proper friction and durability, allowing for smooth pivoting and rapid manufacturing, maintaining hinge functionality over time.
Implementation Method 1
The lining is fit in the socket so that the lining cannot be rotated in the socket
Implementation Method 2
proper friction between the bush and the shaft
Data Source
AI summary
A hinge includes a first connector, a lining, a bush and a second connector. The first connector includes a root and a socket extended from the root. The root can be connected to a host of a laptop computer. The lining is fit in the socket so that the lining cannot be rotated in the socket. The bush is fit in the lining so that the bush cannot be rotated in the lining. The second connector includes a shaft and a plate extended from the shaft. The shaft is rotationally inserted in the bush. The plate can be connected to a liquid crystal display of the laptop computer.