Magnetic Friction Hinge Structure for Durable Device Positioning
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Solution Overview
Problem
Conventional shaft structures used in notebook computers and tablets experience significant durability decay, losing 15 to 30% of their functionality after 15,000 uses, failing to meet the requirements for higher efficiency and longer durability.
Innovation Solution
A shaft structure incorporating a friction fixing member, a friction rotating member with an elastic wall, a latch, and a magnetic module that provides a magnetic repulsive force to maintain positioning performance and enhance durability through frictional and magnetic interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional shaft structures are used, then the device can be manufactured with simpler methods and lower costs, but the durability decays by 15 to 30% after 15000 uses
Solution Approach 1:
The shaft structure is divided into separate functional components: a friction fixing member, a friction rotating member, a latch, and a magnetic module. This segmentation allows each component to perform its specific function independently, improving overall durability while managing complexity through modular design
Solution Approach 2:
The patent replaces pure mechanical positioning with a magnetic positioning system. The magnetic module provides magnetic repulsive force to maintain the latch against the elastic wall, eliminating the need for complex mechanical springs or adjustment mechanisms, thereby improving durability without significantly increasing structural complexity
2Reliability
If magnetic technology is incorporated to maintain positioning performance, then durability is greatly increased, but manufacturing complexity increases
Solution Approach 1:
The magnetic module serves multiple functions: it provides positioning force, maintains friction pressure, and enables automatic homing. This multi-functionality reduces the need for separate components, making the manufacturing process simpler despite incorporating magnetic technology
Solution Approach 2:
The magnetic positioning system provides self-adjusting capabilities through magnetic repulsive force that automatically maintains optimal friction pressure without manual intervention. This self-service characteristic simplifies manufacturing by eliminating the need for precision-adjustable mechanical components
3Device complexity
If friction-based positioning is used, then the structure is simpler, but positioning performance degrades over time due to wear
Solution Approach 1:
The magnetic field acts as an intermediary between the magnetic module and the latch, providing a non-contact force that maintains positioning performance. This intermediary magnetic force compensates for friction wear, allowing the simple friction-based structure to maintain reliable positioning over time
Solution Approach 2:
The shaft structure combines friction-based mechanical components with magnetic positioning elements, creating a composite system that leverages the simplicity of friction mechanisms while using magnetic fields to maintain performance and compensate for wear over time
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 significantly increases the durability of the shaft structure while maintaining positioning performance, enabling automatic homing and reducing manufacturing costs, thus addressing the limitations of existing designs.
Implementation Method 1
The magnetic module is configured to provide a magnetic repulsive force to the latch to push the latch against the elastic wall
Implementation Method 2
The latch is inserted into the friction rotating member and pushed against the inner side of the elastic wall, so that the elastic wall is expanded to push against the fixed wall of the friction fixing member
Implementation Method 3
The friction rotating member is inserted into the friction fixing member... the elastic wall is expanded to push against the fixed wall of the friction fixing member
Data Source
AI summary
A shaft structure and an electronic device using the same are provided. The shaft structure includes a friction fixing member, a friction rotating member, a latch and a magnetic module. The friction fixture has a fixed wall. The friction rotating member has an elastic wall. The friction rotating member is inserted into the friction fixing member. The latch is inserted into the friction rotating member and pushed against the inner side of the elastic wall so that the elastic wall is expanded to push against the fixed wall of the friction fixing member. The magnetic module is configured to provide a magnetic repulsive force to the latch to push the latch against the elastic wall.