Rotating Shaft Lubrication Structure for Quiet Foldable Hinges
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Solution Overview
Problem
Conventional foldable-screen devices experience noise issues due to scraping between components in the rotating shaft apparatus during folding and unfolding, affecting user experience.
Innovation Solution
A rotating shaft apparatus with a lubrication structure, such as a fluorine-based compound or soft elastic material, is introduced to reduce friction between moving parts, specifically between the cantilever segments and primary support members, to minimize noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional rotating shaft apparatus components move and scrape against each other during folding/unfolding, then the device achieves structural simplicity and ease of manufacture, but noise is generated reducing user experience
Solution Approach 1:
A lubrication structure is introduced as an intermediary between the first cantilever segment and the first primary support member. This lubrication structure prevents direct hard contact between the moving components, thereby eliminating the scraping noise while maintaining the simple structural design of the rotating shaft apparatus.
Solution Approach 2:
The friction coefficient between moving parts is changed by introducing the lubrication structure. The lubrication structure has a lower friction coefficient compared to the direct contact between metal components, which reduces the harmful friction and scraping effects during movement, thereby reducing noise without complicating the structure.
2Strength
If hard contact between moving components is maintained for structural integrity, then manufacturing precision and strength are ensured, but noise and friction increase
Solution Approach 1:
The lubrication structure is applied locally at the specific contact interface between the first cantilever segment and the first primary support member. This localized application provides lubrication exactly where needed to reduce friction and noise, while maintaining the overall structural integrity of the rotating shaft apparatus through its simple design.
Solution Approach 2:
The lubrication structure serves as a mediator between the moving components, allowing them to maintain their structural positions and integrity while preventing direct hard contact. This intermediary layer reduces friction and noise without compromising the strength or structural integrity of the overall apparatus.
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 lubrication structure effectively reduces noise by preventing hard contact between moving components, thereby enhancing the user experience and operational smoothness of foldable-screen devices.
Implementation Method 1
The lubrication structure may be a structure with a smooth surface, to be specific, the lubrication structure may be a type of structure whose surface friction coefficient is less than 0.25
Implementation Method 2
The lubrication structure may alternatively be a soft elastic structure. The material of the lubrication structure includes but is not limited to an elastic material including polyurethane, rubber, latex, or the like
Data Source
AI summary
This application provides a rotating shaft apparatus and a foldable-screen device. The rotating shaft apparatus includes a first primary support member, a second primary support member, a first secondary support member, and a lubrication structure. The first primary support member has a first support surface, the second primary support member has a second support surface, and the second primary support member can rotate relative to the first primary support member between an unfolded location and a folded location. The first secondary support member includes a first connection part and a first cantilever part, the first connection part is located on a side facing the second support surface and is connected to the second primary support member, the first cantilever part includes a first cantilever segment, and the first cantilever segment is located on a side facing the first support surface.