Buckle Serrated Profile Prevents Strap Slippage
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Solution Overview
Problem
Existing buckles fail to securely fasten straps during the transportation of dynamic loads, such as springy objects or objects on tires, as the strap slips due to varying strain, leading to unreliable load security.
Innovation Solution
The buckle features bars with a serrated profile at the tensioning side that bites into the strap under strain, preventing slipping, and includes side walls to maintain alignment, with serrations oriented opposite to the strap's direction of strain, ensuring secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a prior art buckle with smooth bars is used, then the strap can pass through easily, but the strap slips under dynamic load conditions
Solution Approach 1:
The bar surface is modified locally with a specific profile featuring alternating protrusions and recesses. This local structural change creates selective engagement: the protrusions bite into the strap to prevent slippage under load, while the recesses allow the strap to pass through during installation. The profile is applied only where needed on the bar surface, maintaining ease of operation while improving reliability.
2Device complexity
If a prior art buckle without profiled bars is used, then the structure is simple, but it cannot secure dynamic loads
Solution Approach 1:
The bar surface geometry is changed by introducing a periodic profile with specific protrusion and recess dimensions. This parameter modification transforms the smooth surface into an engagement structure that interacts with the strap material. The profile parameters (protrusion height, recess depth, spacing) are optimized to provide sufficient biting force for dynamic loads while maintaining reasonable structural simplicity.
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 buckle effectively secures dynamic loads by preventing strap slippage through the serrated profile, maintaining load security even under varying strain conditions during transport.
Implementation Method 1
the bar or bars are provided with a profile which allows the strap to pass through, and that the least strain on the strap causes the profile to bite into the strap
Implementation Method 2
the profile of the bar or bars comprises a serration, and in particular a serration that is oriented opposite to the strap's direction of strain
Data Source
AI summary
A buckle for securing a strap for goods, comprising a body having two side walls and bars extending between these side walls, which bar or bars provided with a peripheral roughening, wherein at least one tensioning side of the body of the bar or bars are provided with a profile which allows the strap to pass through, and that the lease strain on the strap causes the profile to bite into the strap.