Foldable Screen Hinge Assembly With Direct Gear Synchronization
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Solution Overview
Problem
Current foldable screen hinges have complex assembly processes due to multiple gears and intermediate links, leading to poor synchronization and large spatial dimensions.
Innovation Solution
A hinge assembly design that integrates a base with first and second fitting portions, synchronizing shafts, and gear sleeves, where the gear ends engage directly or indirectly to reduce parts and intermediate links, enhancing synchronization and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If four gears and four shafts with circlips are used for gear synchronization, then the synchronization function is achieved, but the assembly complexity increases and device dimensions enlarge
Solution Approach 1:
The patent merges the gear and shaft into an integrated structure where the gear is directly formed on the shaft, eliminating the need for separate circlips and intermediate links. This integration reduces the number of parts from four gears plus four shafts plus four circlips to a simplified gear-shaft assembly, directly reducing assembly complexity while maintaining the synchronization function.
Solution Approach 2:
The patent extracts and eliminates unnecessary intermediate links and circlips from the synchronization mechanism. By removing these redundant components, the design achieves direct gear engagement between movable pieces, simplifying the assembly process while preserving the core synchronization functionality.
2Stability of the object's composition
If multiple intermediate links are used between gears and swing arms, then the connection is achieved, but the synchronization performance deteriorates and spatial dimensions increase
Solution Approach 1:
The patent combines the gear and swing arm connection into a direct engagement structure, eliminating intermediate links. The gear ends of adjacent movable pieces engage directly, creating a stable and reliable connection that improves synchronization performance by reducing the number of potential failure points and tolerance accumulation.
3Strength
If four circlips are used to fasten gears on shafts, then the fastening function is achieved, but the assembly process becomes complex
Solution Approach 1:
The patent merges the gear and shaft into a single integrated component, eliminating the need for circlips to fasten separate parts. This integration maintains the necessary mechanical strength through the unified structure while dramatically simplifying the assembly process by removing the fastening step entirely.
4Stability of the object's composition
If a long synchronization chain with many intermediate links is used, then the connection is achieved, but the assembly tolerance increases and synchronization quality deteriorates
Solution Approach 1:
The patent extracts and removes all intermediate links from the synchronization chain, creating a direct engagement system. This reduction in the number of connection points eliminates tolerance accumulation, thereby improving synchronization precision while maintaining complete mechanical connection through direct gear-to-gear engagement.
Data Source
AI summary
A hinge assembly and an electronic device are provided. The hinge assembly includes: a base provided with a first fitting portion and a second fitting portion; a first synchronizing shaft; a second synchronizing shaft; a first movable piece; and a second movable piece. A first end of the first synchronizing shaft is able to be movably connected to the first fitting portion. A first end of the second synchronizing shaft is able to be movably connected to the second fitting portion. A first end of the first movable piece is provided with a first gear sleeve. An outer surface of the first gear sleeve is provided with a first gear end. The first gear sleeve is connected to and moves synchronously with the first synchronizing shaft. A first end of the second movable piece is provided with a second gear sleeve.