Dual-Torque Hinge Mechanism for One-Hand Notebook Opening
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Solution Overview
Problem
Conventional hinge mechanisms in notebook computers provide uniform torque in all directions, making it difficult for users to fold and unfold the device with a single hand, as they require significant external force to overcome the torque, which does not meet the needs of modern consumer electronic products.
Innovation Solution
A dual-torque hinge mechanism that includes a rotary shaft, bridging components, resistance assemblies, and a driving assembly, allowing for torque adjustment by changing the engagement between the first and second driving portions and resistance components based on the direction of rotation, providing different torque scales when folding and unfolding the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hinge mechanism provides large-scale torque to hold the screen cover during folding, then the screen cover is prevented from rapidly hitting the host base, but the user has to apply large-scale external force to overcome the torque for unfolding
Solution Approach 1:
The hinge mechanism dynamically adjusts torque based on rotation direction through the driving assembly. When folding, the torque generating component engages with the resistance assembly to provide large-scale torque for stability. When unfolding, the engagement is disengaged or reduced, providing only small-scale torque, thereby reducing the force required by users.
Solution Approach 2:
The hinge mechanism applies different torque characteristics to different rotation directions. The driving assembly is configured so that the torque generating component selectively engages with the resistance assembly only during folding operations, providing localized torque enhancement where needed while maintaining ease of operation in the opposite direction.
2Device complexity
If the hinge mechanism provides uniform torque in all directions, then the structure is simple, but the user cannot unfold the device with a single hand due to excessive force requirement
Solution Approach 1:
The hinge mechanism transitions from a static uniform torque design to a dynamic variable torque design. The driving assembly with torque generating component and resistance assembly enables the hinge to automatically adjust torque output based on the direction of rotation, maintaining structural simplicity while dramatically improving ease of operation.
3Ease of operation
If the hinge mechanism provides small-scale torque during unfolding, then the user can easily unfold the device, but the screen cover may not be sufficiently held during folding
Solution Approach 1:
The hinge mechanism applies different torque characteristics to different rotation directions. The driving assembly is configured so that the torque generating component selectively engages with the resistance assembly only during folding operations, providing localized torque enhancement where needed while maintaining ease of operation in the opposite direction.
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
Enables easy unfolding with reduced force requirement by providing small-scale torque and increased stability during folding by generating large-scale torque, enhancing user convenience and aligning with modern consumer electronic product standards.
Implementation Method 1
the first resistance component and the second resistance component... configured to generate resistance force and torque during rotation
Data Source
AI summary
A dual-torque hinge mechanism includes a rotary shaft, a second bridging component, a resistance assembly, a torque generating component and a driving assembly. The second bridging component is rotatably disposed on the rotary shaft. The resistance assembly is disposed on the rotary shaft and coupled to second bridging component. The torque generating component is coupled to the rotary shaft. The driving assembly is disposed between the resistance assembly and the torque generating component.