Uneven-Surface Tourniquet for Slip Resistance and Easy Extension
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Solution Overview
Problem
Conventional tourniquets with uniform textures on top and bottom surfaces lack sufficient friction and slip resistance, especially when subjected to different pulling forces, limiting their effectiveness in extending and securing around body parts.
Innovation Solution
A tourniquet with uneven surfaces formed integrally on both sides, featuring specific geometric patterns of first and second uneven zones with varying incline edges and depths, enhancing friction and slip resistance by requiring more force on short edges and allowing easier extension along the length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform textures are used on tourniquet surfaces, then manufacturing is simple, but friction and slip resistance are insufficient
Solution Approach 1:
The tourniquet surface is divided into multiple local zones with different textures (first uneven zones with first inclined edges, second uneven zones with second inclined edges). Each zone has specific local characteristics that contribute to overall friction and slip resistance, while maintaining manufacturability through integral molding.
Solution Approach 2:
The first and second uneven zones have asymmetric inclined edges with different heights and orientations. The first inclined edges have a first height, while the second inclined edges have a second height different from the first, creating asymmetric surface profiles that enhance grip and prevent slippage in multiple directions.
2Reliability
If oblique crossing texture patterns are used, then slip resistance is improved, but extension capability is limited
Solution Approach 1:
The surface texture is segmented into distinct first uneven zones and second uneven zones arranged in alternating rows. This segmentation allows different zones to serve different functions: some zones provide slip resistance while others facilitate extension, resolving the contradiction between grip and extensibility.
Solution Approach 2:
The uneven zones are designed to deform dynamically under different loading conditions. When the tourniquet is extended, certain zones deform more than others, allowing the material to stretch while maintaining surface grip characteristics. The inclined edges flex and reconfigure during extension.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The uneven surface design significantly increases friction and slip resistance, facilitating easier extension and secure wrapping around body parts by requiring greater force on short edges while allowing smooth lengthwise pulling.
Implementation Method 1
a tourniquet having uneven top and bottom surfaces for increasing friction and slip resistance when the tourniquet is applied to the body part
Implementation Method 2
extent of an elastic deformation of the second inclined edge is greater than that of the first inclined edge
Data Source
AI summary
A tourniquet includes an elastic band including uneven top and bottom surface. The uneven surface includes rows of a plurality of spaced first uneven zones and rows of a plurality of spaced second uneven zones. The first uneven zone is disposed between two adjacent ones of the second uneven zone. The second uneven zone is disposed between two adjacent ones of the first uneven zone. The first and second uneven zones are concave rectangular. Each uneven zone includes two raised, opposite inclined edges and the other two raised, opposite inclined edges. A ridge is formed between two adjacent inclined edges of different uneven zones.