Multi-segment Rotary Shaft for Smooth Electronic Cover Rotation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pivot devices in electronic devices, such as notebooks, often have misaligned shaft axes, limiting the rotational freeness and smooth opening/closing of the upper cover, resulting in coordinated rotation difficulties.
Innovation Solution
A multi-segment rotary shaft structure comprising driving and driven joint assemblies with synchronous driving sections and connection mechanisms, utilizing multiple shaft pins for alignment and synchronization, allowing for smooth and coordinated rotation around multiple centers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional pivot devices with single shaft and sleeve are used, then the structure is simple, but the rotational freeness is limited and coordination between two ends is poor
Solution Approach 1:
The rotary shaft structure is divided into multiple segments including first joint plates, second joint plates, and intermediate link plate assemblies. Each segment can rotate independently around its own rotational center, enabling the two ends to rotate freely and coordinates simultaneously. This segmentation resolves the contradiction by trading increased structural complexity for significantly improved rotational freedom and coordination.
Solution Approach 2:
The invention transitions from a single-axis rotation system to a multi-axis rotation system by introducing intermediate link plate assemblies that connect first and second joint plates through additional rotational centers. This dimensional expansion allows rotational motion to occur in multiple planes, enhancing rotational freedom while maintaining structural coherence through the link plate mechanisms.
2Strength
If two sets of pivot devices are disposed on two sides, then support strength is improved, but the shaft axes fail to coincide and coordination rotation becomes difficult
Solution Approach 1:
The invention merges the functions of multiple pivot devices by connecting first joint plates and second joint plates through intermediate link plate assemblies. This integration ensures that when one end rotates, the other end rotates coordinates through the mechanical coupling of the link plates, maintaining support strength while achieving perfect coordination. The synchronous driving sections and connection driving sections work together to ensure both ends move in unison.
Solution Approach 2:
Intermediate link plate assemblies serve as mediators between the first and second joint plates. These link plates transmit and synchronize the rotational motion from one end to the other, ensuring that the shaft axes effectively coincide during operation. The intermediary structures include synchronous driving sections that engage with connection driving sections to coordinate the rotation of both ends while maintaining the required support strength.
3Ease of manufacture
If shaft axes are misaligned, then manufacturing is easier, but rotational smoothness and operational freedom are limited
Solution Approach 1:
The invention employs dynamic adjustment mechanisms where the intermediate link plate assemblies can adapt to slight misalignments between shaft axes. The spherical joints and rotational centers within the link plates allow for automatic compensation during assembly, maintaining rotational smoothness without requiring precise pre-alignment. This dynamic capability resolves the contradiction by allowing easier manufacturing while preserving operational smoothness.
Data Source
AI summary
A multi-segment rotary shaft structure includes a driving joint assembly and a driven joint assembly. The driving joint assembly at least includes two opposite joint plates and a middle link plate assembly engaged therebetween. The driven joint assembly is disposed between the opposite joint plates and includes at least two driven plates. Opposite ends of the driven plates are formed with synchronous driving sections drivingly engaged with each other. Inward ends of the opposite joint plates are linked with outward ends of the driven plates. Outward ends of the middle link plate assembly are linked with the inward ends of the driven plates. The driving joint assembly and driven joint assembly are stringed and pivotally connected and combined, whereby the joint plates can be freely rotated around multiple rotational centers.