Multi-Hollow Profile Passenger Restraint System
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Solution Overview
Problem
Existing passenger restraint systems in vehicles face challenges in achieving both economic viability and meeting safety and stability criteria, particularly in accident scenarios, while maintaining a cost-effective and efficient design.
Innovation Solution
A device comprising a support arrangement with vertical supports and an elongate cross brace, constructed from multiple hollow profile elements, which provides enhanced stability and resistance to dynamic loads by aligning stiffening sections to absorb forces and moments, allowing for a more compact and lightweight design without compromising safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional solid profile elements are used for vertical supports and cross braces, then structural strength is sufficient, but device weight and material usage increase
Solution Approach 1:
The solid profile elements are segmented into multiple hollow profile elements (at least two) that are interconnected. This segmentation creates internal hollow spaces that reduce material usage and weight while maintaining external dimensions. The hollow profiles are arranged and connected to form a multi-hollow profile structure that preserves structural strength through strategic positioning and interconnection of the hollow elements.
Solution Approach 2:
The hollow profile elements are positioned and oriented within the support and cross brace structures to create local variations in material distribution. The hollow sections are strategically placed to maintain strength where needed while reducing weight in less critical areas. The interconnection of hollow profiles creates a structure with non-uniform local properties that optimize the strength-to-weight ratio.
2Stability of the object's composition
If larger dimensional supports are used, then stability and load resistance improve, but device complexity and material usage increase
Solution Approach 1:
Instead of using a single large-diameter solid profile, the structure is divided into multiple smaller hollow profile elements that are interconnected. This segmentation allows the support and cross brace to achieve comparable or superior stability through the distributed structure, while reducing material usage and simplifying manufacturing compared to a monolithic large profile.
Solution Approach 2:
The device employs a composite structure formed by interconnecting multiple hollow profile elements. This composite approach combines several smaller profiles to create a structure with enhanced stability and load resistance, equivalent to or exceeding that of larger solid profiles, while using less material and reducing overall structural complexity.
3Reliability
If more material is used for supports and cross braces, then stability and safety in accident scenarios improve, but manufacturing cost increases
Solution Approach 1:
The use of multiple interconnected hollow profile elements provides sufficient structural integrity and safety performance in accident scenarios while reducing the total quantity of material required. The hollow structure maintains external dimensions and load-bearing capacity through strategic positioning and interconnection of the profile elements.
Solution Approach 2:
The hollow profile elements are positioned and oriented to concentrate material where structural strength is most needed for safety, while reducing material in areas where weight reduction is beneficial. This local optimization maintains safety performance while reducing overall material usage and manufacturing cost.
Data Source
Figure 1~3
Figure 4~7
AI summary
A device (1) for arranging a passenger restraint system in a means of transport is proposed in order to secure a person seated in the means of transport. The device (1) comprises a support arrangement (2) with a vertical support (3, 4) that can be fixed upright in a floor area of the means of transport. An elongated crossbar (5) is received on the vertical support (3, 4) and is oriented at an angle to the vertical support (3, 4). According to the invention, the vertical support (3, 4) and/or the crossbar (5) are constructed as a multi-hollow profile element (6, 7, 8), wherein the multi-hollow profile element (6, 7, 8) comprises two longitudinally connected hollow bodies (6a, 6b; 7a, 7b; 8a, 8b) over at least its substantial extent.