Foldable Hinge Damping Mechanism for High Torque in Tight Space
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Solution Overview
Problem
Conventional foldable electronic devices face challenges in providing sufficient damping force due to limited space, leading to instability and reduced user comfort during rotation of the device components.
Innovation Solution
A damping mechanism with a damping swing arm and rolling body system, featuring inclined guide surfaces and a push-pressing apparatus, amplifies damping force through rolling friction and direct transmission, reducing abrasion and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the damping mechanism uses a conventional structure with limited space, then the device can be compact, but the damping force is insufficient
Solution Approach 1:
The patent employs a guide surface with an inclined curvature on the damping member, which works in conjunction with the rolling body to amplify the push-pressing force. The curved geometry transforms the linear motion into a rotational rolling motion, generating greater damping force within the constrained space through mechanical advantage provided by the curved surface profile.
Solution Approach 2:
The damping mechanism transitions from a static friction-based system to a dynamic rolling friction system. The rolling body dynamically interacts with the inclined guide surface during rotation, continuously adapting the contact point and leverage arm length, which amplifies the damping force output without increasing the overall mechanism volume.
2Reliability
If the damping mechanism uses sliding friction, then the structure is simple, but the friction and abrasion are high
Solution Approach 1:
The patent replaces the conventional sliding friction mechanical interaction with a rolling friction mechanism. The rolling body rotates along the inclined guide surface instead of sliding, fundamentally changing the friction paradigm from sliding friction to rolling friction, which significantly reduces abrasion and wear while extending component durability.
Solution Approach 2:
The invention changes the friction parameter from sliding friction to rolling friction by introducing a rolling body. This parameter change reduces the coefficient of friction and wear, thereby improving reliability and durability. The rolling motion maintains structural simplicity while achieving lower friction through the change in interaction mode.
3Force
If the push-pressing force is small, then the mechanism requires less actuation force, but the damping feedback is insufficient
Solution Approach 1:
The inclined guide surface curvature creates a mechanical advantage that amplifies the push-pressing force. As the rolling body moves along the curved surface, the changing radius of curvature varies the leverage arm, naturally amplifying the damping feedback force during the rotation process, which enhances user comfortableness without requiring larger actuation forces.
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
Enhances damping feedback and stability, improves user comfort, and reduces the overall size of the damping mechanism while maintaining high durability and efficient force transmission.
Implementation Method 1
the rolling body and the damping member are connected in a rolling manner, and rolling friction is generated
Implementation Method 2
the elastic member is elastically deformed along the axis of the connecting shaft, and applies the push-pressing force to the sliding member
Data Source
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AI summary
This application provides a damping mechanism, a hinge apparatus, and a foldable electronic device. The damping mechanism includes a fixed base, a damping swing arm, a rolling body, and a push-pressing apparatus. The damping swing arm is rotatably disposed on the fixed base by using a damping member, a first concave portion, a protrusion, and a second concave portion are disposed on a side wall of the damping member, and the protrusion has a guide surface inclined relative to an axis. When the push-pressing apparatus squeezes the guide surface of the protrusion by using the rolling body, the guide surface can enhance effect of a push-pressing force of the push-pressing apparatus, so that the damping member is subject to greater pressure, and torque damping is increased when the damping swing arm rotates. Therefore, in same space, the damping mechanism can provide a greater damping force. This ensures that the damping swing arm can stably hover at any rotation position and improves comfortableness of rotating the damping swing arm.