Tubular Outsole Stud with Partition Walls and Locking Portions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing outsole structure with studs integrated by injection of the same material into openings results in low adhesion between the outsole body and studs, leading to separation issues, especially when the studs are deeply embedded in the ground.
Innovation Solution
The outsole structure incorporates a tubular stud design with a core and partition walls, where a locking portion is physically locked to the partition wall, providing secure attachment even if adhesion is low, and additional features like second partition walls and bulging portions enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the outsole body and studs are integrated together by injection of the same material into the openings, then the manufacturing process is simplified, but the adhesion between the outsole body and studs becomes low, causing separation when studs are deeply embedded in the ground
Solution Approach 1:
The stud is divided into multiple functional parts: a tubular body for ground contact, a core for structural support, and partition walls for mechanical interlocking. The outsole body includes a locking portion that engages with the partition walls. This segmentation allows the stud to maintain both ease of integration through injection molding and reliable attachment through mechanical interlocking of the locking portion with the partition walls.
2Ease of manufacture
If the projections are fitted into the openings with tapered shape, then the integration process is simple, but the studs are easily separated from the outsole body when deeply embedded in the ground
Solution Approach 1:
The stud structure is segmented into a tubular body, core, and partition walls, replacing the simple tapered projection design. The partition walls create distinct engagement zones that work together with the locking portion to provide superior attachment strength while maintaining manufacturing simplicity through injection molding.
Solution Approach 2:
The locking portion acts as an intermediary mechanical element between the outsole body and the stud. It engages with the partition walls to transmit and distribute forces, preventing stud separation during deep ground embedding while allowing the entire assembly to be manufactured in one injection molding process.
3Ease of operation
If the opening has a continuously decreasing cross-section from upper end to ground contact surface, then the projection can be easily inserted, but the stud separation cannot be sufficiently prevented under load
Solution Approach 1:
The opening is restructured with partition walls that create segmented engagement zones rather than a continuously decreasing cross-section. The locking portion is designed to engage with these partition walls at specific locations, providing reliable resistance to stud separation while maintaining ease of insertion through the structured opening geometry.
Data Source
AI summary
A stud of an outsole structure includes: a tubular body having a ground contact portion that comes into contact with ground, and a hole passing through the stud upward from the ground contact portion; a core disposed inside the hole and extending vertically; and a plurality of partition walls disposed above the ground contact portion and extending radially from the core toward an inner wall surface of the tubular body. An outsole body has a plurality of locking portions disposed below the partition walls. Each of the locking portions is locked to an associated one of the partition walls in a state in which an upper end portion of the locking portion is in contact with a lower end portion of the associated partition wall.