Cam-Damped Rotating Shaft Mechanism for Foldable Display Support
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Solution Overview
Problem
Foldable terminal devices, such as mobile phones, face challenges in providing reliable damping forces to support their flexible displays during folding and unfolding, leading to potential damage and reduced durability of the rotating shaft mechanism over time.
Innovation Solution
A rotating shaft mechanism incorporating a main shaft assembly and a damper assembly with a cam member and sliding member that generates damping force through elastic abutment, designed to improve the comfort of folding operations and extend the life of the damper assembly by adjusting the damping force based on the specific form of the cam surface and elastic element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotating shaft mechanism is used to enable foldable terminal devices to fold and unfold, then the flexibility and adaptability of the terminal device are improved, but the mechanism suffers from insufficient damping force and reduced reliability over time
Solution Approach 1:
The patent transforms the static rotating shaft mechanism into a dynamic one by introducing a cam mechanism that converts rotational motion into reciprocating linear motion of a sliding member. This dynamic transformation enables the mechanism to provide variable damping forces during folding and unfolding operations, improving reliability while maintaining adaptability
Solution Approach 2:
The patent introduces an elastic element as an intermediary component between the sliding member and the cam mechanism. This elastic element stores and releases energy during the folding cycle, providing additional damping force and protecting the mechanism from impact loads, thereby enhancing reliability
2Ease of operation
If the rotating shaft mechanism operates frequently for folding and unfolding, then the ease of operation is improved, but the wear and tear on components increases, reducing the lifespan of the damper assembly
Solution Approach 1:
The patent implements beforehand cushioning by using the elastic element to absorb impact energy before it reaches critical components. The elastic element is pre-loaded and continuously provides cushioning force during folding operations, protecting the damper assembly from wear and extending its lifespan while maintaining ease of operation
Solution Approach 2:
The patent partially replaces the pure mechanical friction-based damping system with an elastic energy storage and release system. This substitution reduces direct mechanical contact and wear between components while maintaining the damping function, thereby extending component lifespan
3Device complexity
If a simple rotating shaft mechanism is used, then the device complexity is reduced, but the damping force magnitude and stability are insufficient
Solution Approach 1:
The patent adds a cam mechanism that converts simple rotational motion into complex reciprocating motion with variable force characteristics. This dynamic mechanism allows the sliding member to press against the cam surface with varying force during different phases of folding, providing stable and adjustable damping force while adding only moderate complexity to the overall mechanism
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 provides effective damping support to the flexible displays, enhancing the reliability and durability of foldable terminal devices by reducing wear and tear on the components, thus ensuring a comfortable folding experience and extending the lifespan of the damper assembly.
Implementation Method 1
a sliding member (10122) configured to slide in a direction toward or away from the main shaft assembly (102) relative to the rotating member (10121), and configured to elastically abut against the cam surface (10111)
Implementation Method 2
An abutting force formed through elastic abutting may be transformed into resistance of relative rotation of the cam member (1011) and the rotating assembly (1012), to generate the damping force between the main shaft assembly (102) and the damper assembly (101)
Data Source
AI summary
A rotating shaft mechanism is provided. The mechanism includes a main shaft assembly and a damper assembly, and the damper assembly is rotatably connected to the main shaft assembly; the damper assembly may include a cam member and a rotating assembly, the cam member is fastened on the main shaft assembly, the cam member has a cam surface, the rotating assembly includes a rotating member and a sliding member, the rotating member is rotatably connected to the main shaft assembly, and the sliding member may slide in a direction toward or away from the main shaft assembly relative to the rotating member; and the sliding member elastically abuts against the cam surface. An abutting force formed through elastic abutting may be transformed into resistance of relative rotation of the cam member and the rotating assembly, to generate a damping force between the main shaft assembly and the damper assembly.