Take-off Needle Flanges for Ergonomic Grip and Slipping Prevention
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Solution Overview
Problem
Existing take-off needles have limited ergonomic design, requiring users to adapt their hand to the cylindrical body and spigot, which can lead to discomfort and increased risk of slipping during insertion operations.
Innovation Solution
The take-off needle features two flanges spaced apart by a spacer, extending from the spigot to the proximal end of the hollow lance, with arcuate and transversely curved designs to facilitate intuitive hand grasping and provide a guard against slipping, enhancing ergonomic handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the holding body is designed as a simple cylindrical body with spigot, then the device complexity is reduced and manufacturing is easier, but the ergonomic quality deteriorates and user comfort decreases
Solution Approach 1:
The holding body is segmented into multiple functional zones: a cylindrical body for basic holding, a flange for enhanced grip, and a guard for finger protection. This segmentation allows each zone to serve a specific ergonomic function, improving overall user comfort without requiring complete redesign of the entire structure.
Solution Approach 2:
A flange is added to the cylindrical holding body, extending the grip surface into a new dimensional space. This flange provides an additional grasping surface that accommodates different hand positions and sizes, enhancing ergonomics while maintaining the simplicity of the cylindrical core structure.
2Ease of operation
If the user grasps the cylindrical holding body directly, then the device complexity remains simple, but the risk of slipping increases and control decreases
Solution Approach 1:
The holding body is divided into distinct functional elements: the cylindrical body for structural support, the flange for secure grasping, and the guard for finger protection. This segmentation allows the flange to specifically address grip security while the guard independently manages slipping prevention.
Solution Approach 2:
The flange acts as an intermediary element between the user's hand and the cylindrical holding body. It provides a dedicated grasping surface that mediates the interaction, improving grip security and reducing direct contact with the smooth cylindrical surface that causes slipping.
3Object-affected harmful factors
If a guard is added to protect fingers during insertion, then the protection function is improved, but the device complexity increases
Solution Approach 1:
The guard is merged with the flange structure, forming an integrated component rather than a separate part. This combination provides both the grasping function of the flange and the protective function of the guard in a single unified structure, reducing overall device complexity while maintaining both functions.
Solution Approach 2:
The flange-guard combination serves multiple functions simultaneously: it provides a grasping surface for user control, acts as a physical barrier to protect fingers during insertion, and maintains structural integrity of the holding body. This multi-functionality reduces the need for separate components.
Data Source
AI summary
A take-off needle comprises a hollow lance having a distal end adapted to perform a insertion operation, said hollow lance being connected to at least one pipe provided with a spigot for it to be connected to a tube, and comprising a body for holding the hollow lance and pipe relative to each other such that the spigot projects from the holding body, said needle further comprising two flanges held on respective sides of and spaced from the holding body by virtue of a spacer disposed between each flange and the holding body, said flanges extending in a longitudinal direction from the spigot to the vicinity of the proximal end of the hollow lance, the width of each flange being greater than the width of the portion of the holding body facing the flanges.