Ribbed Grip Pin Head for Tough-Fabric Sewing Control
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Solution Overview
Problem
Existing sewing pins with elongate tapered ribbed heads are difficult to manipulate and control, particularly when penetrating tough materials like denim.
Innovation Solution
A pin design featuring an elongate tapered ribbed head with a plurality of outwardly projecting gripping rings, providing improved grip and control during sewing, especially with tough fabrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an elongate tapered ribbed head is used on a pin, then the pin can penetrate tougher materials like denim, but the pin becomes difficult to pick up, grasp, manipulate and control
Solution Approach 1:
The pin head is segmented into multiple functional zones: the elongate tapered ribbed portion for penetration and the separate gripping rings for easy grasping. This segmentation allows each zone to perform its specific function independently, resolving the contradiction between penetration capability and ease of grasp.
Solution Approach 2:
Different regions of the pin head have different qualities: the elongate tapered ribbed head provides the necessary strength and penetration capability for tough materials, while the gripping rings provide enhanced friction and ease of grasp. This local differentiation of properties resolves the contradiction by optimizing each region for its specific purpose.
2Strength
If the pin head is made elongate and tapered for penetration, then penetration of tough materials is improved, but the pin becomes harder to manipulate and control
Solution Approach 1:
The pin head is divided into distinct functional segments: the elongate tapered ribbed portion optimized for penetration strength, and the gripping rings optimized for manipulation and control. This segmentation allows the pin to achieve both penetration strength and ease of manipulation simultaneously.
Solution Approach 2:
The gripping rings add a new dimensional element to the pin head design, providing a peripheral gripping surface that extends the functional capabilities beyond the traditional elongate tapered form. This dimensional addition enables improved manipulation without compromising penetration strength.
Data Source
AI summary
A pin includes: (a) a pin shaft with a pin point; (b) an elongate pin head attached to an end of the pin shaft distal to the pin point having a pin head length, wherein the elongate pin head is characterized by an elongate tapered ribbed construction with a plurality of ribs defining a rib profile extending from an outer end of the elongate pin head distal to the pin shaft to an inner end of the elongate pin head proximate the pin shaft, said rib profile having a characteristic outer end dimension which is larger than a characteristic inner end dimension of the rib profile proximate the pin shaft, said elongate pin head being further characterized by a plurality of outwardly projecting gripping rings located a distance from the outer end of the pin head toward the inner end of the pin head.