Integrated Groove Hinge Structure for Low-Assembly Board Joints
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Solution Overview
Problem
Conventional hinge structures using screws, riveting, or welding for rotatable connections between boards are costly and complex, and long hinge leaves or multiple short hinge leaves with high assembly demands are required for stable connections, leading to increased manufacturing and assembly costs.
Innovation Solution
A hinge structure comprising first and second boards with integrally formed connecting portions that bend to create grooves for a hinge shaft, allowing a 90° rotation angle and ensuring the openings of these grooves always face different directions to prevent the shaft from falling off, simplifying assembly and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional accessories (leaves, hinges, rotation shafts) fixed by screws, riveting, or welding are used, then rotatable hinge connections between boards are achieved, but manufacturing and assembly costs increase
Solution Approach 1:
The connecting portions are integrally formed with the board bodies, merging the board and connecting component into a single piece. This eliminates the need for separate accessories and fasteners, reducing structural complexity while maintaining connection reliability through the integrated design
Solution Approach 2:
The connecting portions serve multiple functions: they provide structural support, enable rotation, and form the groove for the hinge shaft all through a single integrated component. This multi-functionality reduces the number of parts needed while achieving reliable hinge connections
2Reliability
If long hinge leaves are used to ensure hinge connection quality of relatively long seams of joints, then connection stability is improved, but manufacturing costs and assembly demands increase
Solution Approach 1:
The hinge connection is segmented into multiple connecting portions distributed along the joint seam, with each portion providing localized support. This segmentation allows shorter individual components to work together effectively, reducing manufacturing complexity and assembly difficulty while maintaining overall connection quality
Solution Approach 2:
The connecting portions extend in multiple directions from the board edges, creating a three-dimensional arrangement that provides structural support along the entire joint length without requiring long linear components. This spatial distribution reduces assembly demands while ensuring connection stability
3Reliability
If multiple sets of short hinge leaves are used to meet coaxial requirement, then hinge connection quality is maintained, but assembly demands and costs increase
Solution Approach 1:
Multiple connecting portions are integrally formed with their respective board bodies, merging what would be separate components into unified structures. This integration eliminates the need for precise coaxial alignment during assembly, reducing assembly demands while maintaining connection quality through the inherent structural alignment of the integrated components
Data Source
AI summary
The application discloses a hinge structure which comprises: a first board body and a first connecting portion extending from a portion of an edge of the first board body and bending to define a first groove; a second board body and a second connecting portion extending from a portion of an edge of the second board body and bending to define a second groove; and a hinge shaft extending through the first groove and the second groove; wherein a maximum rotation angle between the first and second connecting portions is approximately 90°. Throughout an original state in which the first and the second connecting portions are not rotated relative to each other, a limiting state in which they are rotated approximately 90°, and an intermediate transition state between the two states, a first opening of the first groove and a second opening of the second groove always face different directions.