Monitor Hinge Mechanism With Torque-Amplifying Friction Control
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Solution Overview
Problem
Existing monitor designs lack efficient mechanisms to smoothly rotate and maintain the monitor at desired angles while providing a stable and damping feel during operation.
Innovation Solution
A hinge mechanism incorporating a speed reduction assembly and friction assembly, where the friction assembly generates a torque that is amplified by the speed reduction member, ensuring the monitor can be rotated smoothly and maintained at any angle with enhanced damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a monitor is designed to be rotatable to improve reading convenience, then the user can freely adjust the display direction, but the monitor may rotate unintentionally and fail to maintain the desired angle
Solution Approach 1:
The hinge mechanism employs a dynamic friction control system where the friction coefficient between contact surfaces can be adjusted through elastic elements. This allows the monitor to be easily rotated when force is applied, yet maintain stable positioning when at rest, resolving the contradiction between rotation ease and positioning stability
Solution Approach 2:
The system changes the friction parameter dynamically through elastic elements that apply varying normal forces on the friction surfaces. When rotation is needed, the applied force overcomes the friction; when positioning is required, the elastic elements maintain optimal friction pressure to prevent unwanted movement
2Stability of the object's composition
If a friction assembly is added to prevent unwanted rotation, then the monitor can be maintained at desired angles, but the rotation operation becomes more difficult
Solution Approach 1:
The friction assembly is designed to provide just enough friction force to prevent unwanted rotation during normal operation, but not so much that it prevents intentional rotation. The elastic elements are pre-loaded to provide partial friction action that maintains positioning while allowing rotation when sufficient force is applied by the user
3Force
If a speed reduction assembly is incorporated to amplify torque, then the damping feel during rotation is enhanced, but the device complexity increases
Solution Approach 1:
Instead of using a complex multi-stage gear reduction system, the patent achieves torque amplification by changing the dimensional arrangement of friction surfaces. The friction assembly is positioned at a radial distance from the rotation axis, creating a torque multiplication effect through leverage without requiring multiple gear stages, thus reducing overall mechanism complexity
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 mechanism allows for smooth rotation and stable positioning of the monitor, enhancing the operational feel by preventing unwanted rotation and maintaining the monitor at desired angles through amplified torque and frictional forces.
Implementation Method 1
the friction assembly includes a friction member and a force application member... the friction surface abuts against the back plate
Implementation Method 2
the force application member is an elastic element (for example, a spring or a reed), one end of the elastic element contacts the friction member, and another end of the elastic element contacts the one of the back plate and the input plate
Implementation Method 3
the force application member is a magnet, and the back plate is made of a ferromagnetic material, so that the friction surface abuts against the back plate
Data Source
AI summary
An electronic device includes a monitor stand, a hinge mechanism, and an operation element. The hinge mechanism includes a back plate, a speed reduction assembly, and a friction assembly. The back plate is fixed to the monitor stand. The speed reduction assembly includes an input plate and a speed reduction member. The speed reduction member is arranged on the input plate. The friction assembly is arranged between the back plate and the input plate. The operation element is connected to the speed reduction member. A rotation center of the operation element coincides with an axis of the back plate and the speed reduction member are coaxially arranged.