Rotary Shaft Assembly With Synchronous Rotation and Reduced Gaps
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Solution Overview
Problem
Conventional rotary shaft kits in flexible electronic devices have complex structures, leading to accumulated gaps, increased size, and reduced quality due to assembly tolerances and lack of rigid support, which affects the surface effect and flushness of the flexible screen.
Innovation Solution
A simplified rotary shaft kit design with a four-plate structure, featuring rotating plates and fixing plates on opposite sides, with rotating members and synchronization mechanisms to ensure synchronous rotation and reduce gaps, incorporating a protective shell and compensation assemblies for adjustable distance and improved flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional rotary shaft kit structure is used, then the flexible screen can be supported, but the structure becomes complex resulting in accumulated gaps and reduced manufacturing precision
Solution Approach 1:
The rotary shaft kit is divided into multiple functional modules: rotating assemblies (with rotating plates and rotating members), housing assemblies (with brackets and accommodating spaces), and synchronization mechanisms. Each module performs a specific function and can be independently manufactured and assembled, reducing overall structural complexity while maintaining precision through modular design
Solution Approach 2:
The rotating members are disposed within accommodating spaces defined in the brackets, creating a nested structure where rotating members fit inside housing assemblies. This nesting approach reduces the overall size chain, minimizes accumulated gaps between components, and improves manufacturing precision by reducing the number of external interfaces
2Manufacturing precision
If a conventional rotary shaft kit structure is used, then the flexible screen can be supported, but assembly tolerances increase resulting in larger accumulated gaps
Solution Approach 1:
The synchronization mechanism integrates multiple functions into a single structural element that coordinates the rotation of both rotating assemblies simultaneously. This merging of functions reduces the number of separate components and assembly steps, thereby reducing accumulated assembly tolerances and improving overall assembly precision
Solution Approach 2:
The synchronization mechanism acts as an intermediary between the two rotating assemblies, ensuring they rotate in coordination. This intermediary component mediates the interaction between rotating assemblies and housing assemblies, reducing the impact of individual assembly tolerances on the overall system precision
3Length of moving object
If a simplified four-plate structure is used, then the size chain is reduced, but rotation precision and stability may be compromised
Solution Approach 1:
By nesting rotating members within accommodating spaces of the housing assemblies, the patent reduces the external dimensions and size chain of the rotary shaft kit. The nested structure maintains rotation precision by providing internal support and constraint for the rotating members without increasing the overall footprint
4Manufacturing precision
If rotating members are disposed in accommodating spaces, then gaps are reduced, but the structure becomes more constrained
Solution Approach 1:
The rotating members are designed to rotate within the accommodating spaces, providing dynamic movement capability. The synchronization mechanism enables coordinated rotation of multiple rotating assemblies, allowing the structure to adapt to different rotation requirements while maintaining reduced gaps through the constrained rotational paths
Data Source
AI summary
Described are a rotary shaft kit and an electronic device. The rotatory shaft kit includes: a rotatory shaft assembly, including a protective shell and a first bracket; two rotating assemblies and two housing assemblies. One of the two rotating assemblies is arranged on a side of the rotatory shaft assembly, and the other is arranged on another side; each rotating assembly includes a rotating plate, a first rotating member, and a second rotating member; the first rotating member is connected to the rotating plate at an end of the rotating plate, and the second rotating member is connected to the rotating plate at another end of the rotating plate. One of the two housing assemblies is arranged on the side of the rotatory shaft assembly, and the other is arranged on the another side; each housing assembly includes a second bracket and a fixing plate connected to the second bracket.