Swivel Connector Flat-Contact Structure for Higher Pull Resistance
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Solution Overview
Problem
The existing swivel hook design faces difficulties in improving pulling resistance due to the mismatch between the flat surface of the attachment body's bulge portion and the arc-shaped surfaces of the main body's through holes, leading to inadequate contact and resistance when a pulling force is applied.
Innovation Solution
The connector features a connector body and attachment body with connecting hole portions and a connecting shaft, where the contact flat surfaces are designed to come into surface contact in the pulling direction, providing increased resistance through orthogonal contact and a larger contact area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If arc-shaped surfaces are used in through holes and flat surfaces in bulge portion, then the connector allows rotation and swing movement, but the contact area is insufficient and pulling resistance is poor
Solution Approach 1:
The patent applies different surface geometries to different functional zones: arc-shaped surfaces are provided in the through holes to enable rotation and swing movement, while flat contact surfaces are provided in the bulge portion to maximize contact area and pulling resistance. This local differentiation of surface quality resolves the contradiction between movement capability and pulling strength.
2Device complexity
If only edge contact is provided between flat surface and arc-shaped surfaces, then the structure is simple, but the pulling resistance cannot be improved
Solution Approach 1:
The patent modifies the contact surface geometry by providing flat contact surfaces on the bulge portion that complement the arc-shaped surfaces in the through holes. This curvature matching creates extensive surface contact rather than edge contact, significantly improving pulling resistance while maintaining structural simplicity.
Data Source
AI summary
A connector includes a connector body and an attachment body. The connector body includes a pair of connecting holes, and the attachment body includes a connecting shaft. Connecting holes are formed in the pair of connecting hole portions, and the connecting shaft is provided with a bulge portion located in the connecting holes. Contact flat surfaces are formed in the connecting hole portions and the bulge portion, the contact flat surfaces being configured to come into surface contact with each other in a pulling direction of the connector body and the attachment body.