Folding Shaft Structure for Flexible Display Bending
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Solution Overview
Problem
Conventional pivot shaft structures are not suitable for flexible display screens due to their small bending radius, which can lead to damage, and existing multi-axis hinges are complex and costly to produce.
Innovation Solution
A folding shaft structure with an intermediate bracket, pivot seat, and movable seat panels featuring curved guide grooves and guide pins, allowing the flexible display screen to be bent by forming an interval when folded, while reducing production costs through a simpler design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional pivot shaft structure is used to connect the display screen and host, then the display screen and host can be positioned at different angles when opened, but when closed there is no gap or only a small gap, which is not suitable for flexible display screens that require bending space
Solution Approach 1:
The connection structure is divided into multiple components: a first connection component with a first connection arm, a second connection component with a second connection arm, and a rotating shaft. This segmentation allows independent optimization of each component to achieve both positioning capability and bending space. The first and second connection arms can move relative to each other, creating gaps when closed while maintaining positioning when opened.
Solution Approach 2:
The connection structure employs dynamic elements including a rotating shaft that can rotate, and connection arms that can move relative to each other. This dynamic design allows the structure to adapt between two states: maintaining a fixed positioning angle when opened, and creating sufficient gap space when closed to accommodate flexible display screen bending.
2Adaptability or versatility
If a multi-axis hinge is used to form a bending portion when closed, then the flexible display screen can be bent, but the structure has many components and is complicated in assembly, increasing production and processing costs
Solution Approach 1:
Multiple functions are merged into fewer components. The first and second connection components integrate positioning, support, and gap-forming functions. The rotating shaft combines rotation and positioning capabilities. This merging reduces the total number of components compared to a multi-axis hinge while maintaining the ability to form bending portions for flexible display screens.
Solution Approach 2:
The connection components are designed with multi-functionality: the first and second connection arms simultaneously provide structural support, enable positioning when opened, and create bending space when closed. The rotating shaft serves both as a rotation axis and a positioning mechanism. This multi-functionality reduces component count while achieving bending capability.
3Ease of operation
If a multi-axis hinge with synchronous rotating mechanism, stop means, and friction mechanism is used, then the hinge rods are interlocked or independent, but the structure is complicated and difficult to assemble
Solution Approach 1:
Complex mechanisms such as synchronous rotating mechanisms, stop means, and friction mechanisms are extracted and replaced with simpler alternatives. The interlocking capability is achieved through the basic rotating shaft connection between first and second connection arms, eliminating the need for complex synchronous rotation mechanisms while maintaining the ability to interlock or operate independently.
4Device complexity
If a conventional pivot shaft structure is used, then the structure is simple, but it is not suitable for flexible display screens as the bending radius is too small and the screen is easy to be damaged
Solution Approach 1:
The connection structure utilizes spatial arrangement in multiple dimensions. The first and second connection arms are positioned at different locations and angles, creating a three-dimensional gap structure when closed. This spatial arrangement increases the effective bending radius by distributing the bending space across multiple dimensions, protecting the flexible display screen from damage while maintaining relatively simple structural components.
Data Source
AI summary
A folding shaft structure of a flexible display screen includes an intermediate bracket, a pivot seat, and two movable seat panels. Two sides of an intermediate bracket each have an open groove. The pivot seat is disposed between the two open grooves. Two sides of the pivot seat, facing the two open grooves, are each provided with a curved guide groove and a guide pin. One end of the curved guide groove, away from an opening of the open groove, is a curved tilted end. Each guide pin is disposed close to one end of the curved guide groove away from the curved tilted end. Each movable seat panel has a protruding portion inserted in the open groove. One side of the protruding portion is provided with a protruding pin inserted into the curved guide groove and a guide groove for insertion of the guide pin.