Hinge Torsional Resistance Measurement Using Conductive Probes
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Solution Overview
Problem
Conventional hinges in portable electronic devices face challenges in providing sufficient rotational resistance and support due to manufacturing variations, leading to inconsistent torque and performance, especially in smaller form factors where precise measurements are critical.
Innovation Solution
A measurement system comprising probes with sensing surfaces and an insulating layer, allowing for precise measurement of inner spaces within hinges to achieve consistent and progressive torque distribution, enabling the precise manufacturing of hinges with varying resistance regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional hinge designs are used in smaller form factors, then portability is improved, but manufacturing precision requirements increase due to the need for precise torque control
Solution Approach 1:
The patent replaces complex mechanical torque measurement systems with an electrical sensing system. Conductive probes with sensing surfaces detect torque through electrical contact with the hinge, converting mechanical torque measurement into an electrical measurement process. This substitution enables precise torque measurement in small hinges without requiring complex mechanical measurement apparatus.
Solution Approach 2:
The patent changes the measurement parameter from mechanical dimension to electrical property. By using conductive probes that measure electrical contact characteristics, the system can detect torque variations and manufacturing deviations with high precision. The insulating layer thickness and conductive surface properties are controlled as key parameters to achieve accurate measurements.
2Length of stationary object
If hinge thickness is reduced for portability, then device compactness is improved, but structural strength decreases
Solution Approach 1:
The patent applies local quality by creating varying resistance regions within the hinge structure. Different portions of the hinge have different torsional resistance characteristics, allowing the hinge to provide sufficient overall strength while maintaining thin profile. The measurement system identifies and controls these local resistance variations to ensure proper torque distribution throughout the hinge.
Solution Approach 2:
The patent implements progressive torque distribution where the resistance characteristic changes dynamically across different angular positions and locations within the hinge. This dynamic resistance profile allows the thin hinge to adapt its strength distribution, providing maximum rotational resistance where needed while maintaining compact thickness elsewhere.
3Productivity
If manufacturing variations are not controlled, then production efficiency is improved, but torque consistency deteriorates
Solution Approach 1:
The patent implements preliminary measurement and control of manufacturing variations during the production process. The measurement system detects torque characteristics and dimensional variations early in manufacturing, allowing for real-time adjustments before final assembly. This preliminary action ensures torque consistency is maintained without requiring slow, post-production inspection and adjustment.
Solution Approach 2:
The patent establishes a feedback mechanism where measurement data from the conductive probes is used to control and adjust the manufacturing process. The system continuously monitors torque characteristics and provides feedback to maintain consistent torque output, enabling high-speed production while ensuring reliability through automated process 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 enhances rotational resistance, reduces hinge thickness, and provides a more progressive resistance curve, improving the performance and durability of portable electronic devices by accounting for manufacturing variations and ensuring consistent torque across different angles.
Implementation Method 1
The insulating layer is positioned between the first conductive surface and second conductive surface and electrically insulates the first conductive surface from the second conductive surface
Implementation Method 2
The first side has a first sensing surface configured to generate a first contact signal, and the second side has a second sensing surface configured to generate a second contact signal
Data Source
AI summary
A measurement device includes a probe having a first conductive surface, a second conductive surface, and an insulating layer. The second conductive surface is opposite the first conductive surface and fixed relative to the first conductive surface. The insulating layer is positioned between the first conductive surface and second conductive surface and electrically insulates the first conductive surface from the second conductive surface.