Safety Belt Webbing With Variable Width For Even Winding
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Solution Overview
Problem
Conventional safety belt webbings with inflatable and non-inflatable sections face challenges in even thickness and efficient winding, leading to irregular rolling and potential mechanical damage, especially when transitioning from an intermediate production state to a state of use.
Innovation Solution
The proposed webbing design features an expansion region and a connection region with distinct widths, incorporating a tubular region and compensation overhangs to achieve an even thickness in the state of use, allowing for even winding and protection of components, with the option of inflatable expansion regions and gas generators for enhanced support during accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the webbing has different width regions (expansion region and connection region) in the intermediate production state, then the functional requirements are met, but the thickness becomes uneven in the state of use
Solution Approach 1:
The webbing is folded back onto itself in a nested configuration, with the connection region folded over the expansion region. This nesting allows the narrower connection region to be contained within the broader expansion region, creating an even overall thickness profile when the webbing is in its stowed state, while preserving the different width requirements in the intermediate production state.
Solution Approach 2:
The solution transitions from a two-dimensional width variation problem to a three-dimensional folded structure. By introducing the folding dimension, the webbing achieves uniform thickness in the stowed state through vertical layering rather than horizontal width adjustment, resolving the contradiction between functional width variation and thickness uniformity.
2Volume of moving object
If the webbing is folded up into a narrow winding width for storage, then the stowed size is reduced, but irregular rolling and lateral displacement occur
Solution Approach 1:
The webbing structure is designed with specific local characteristics - the connection region is made narrower and is positioned to fold over the expansion region in a controlled manner. This local structural differentiation ensures that when the webbing is wound, the layers align properly and maintain even thickness, preventing irregular rolling and lateral displacement while achieving compact stowing.
3Ease of manufacture
If the webbing has an even thickness in the state of use, then the winding process is improved, but the design complexity increases
Solution Approach 1:
Instead of trying to make the entire webbing uniform in width to achieve even thickness, the invention inverts the approach by making the connection region narrower and folding it over the expansion region. This inverted design uses the width difference strategically to create the even thickness effect, simplifying the overall structure while achieving the desired winding characteristics.
Data Source
AI summary
A webbing includes, in the longitudinal direction, an expansion region having a first webbing width and a connection region having a second webbing width. The second webbing width is thinner than the first webbing width. In a state of use the webbing is folded up into a winding width, which is thinner than the second webbing width. The second webbing width is an integral multiple of the winding width.