Nested Restraining Strap for Airbag Cladding Retention
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Solution Overview
Problem
In modern motor vehicles, cladding elements such as roof liners and dashboards can be forcibly deformed or detached during airbag deployment, posing a risk of injury to occupants.
Innovation Solution
A restraining strap device with a strap and insert parts, featuring recesses and connection elements, secures cladding elements to structural vehicle parts, preventing detachment and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the restraining strap device is made longer to prevent cladding element detachment, then the retention effectiveness is improved, but the installation space requirement increases
Solution Approach 1:
The strap is folded around to receive the insert part between two layers, creating a nested structure where the insert part is housed within the folded strap layers. This nesting allows the device to maintain a compact form factor while the strap length is sufficient to provide effective retention of the cladding element.
2Stability of the object's composition
If the restraining strap device is made more rigid to maintain cladding element position, then the retention stability is improved, but the ease of installation deteriorates
Solution Approach 1:
The device is divided into separate components: a strap and an insert part with connection elements. The insert part can be independently positioned and secured between the folded strap layers, allowing for easier installation while maintaining structural stability when assembled. The segmentation enables modular assembly and disassembly.
Solution Approach 2:
The insert part acts as an intermediary component between the strap and the cladding element. It provides connection elements that facilitate attachment to the cladding element while the folded strap layers provide the retaining force, distributing the mechanical interaction across multiple components for both ease of installation and retention stability.
3Reliability
If the restraining strap device is designed with complex structure to ensure secure retention, then the reliability is improved, but the manufacturing cost increases
Solution Approach 1:
The insert part serves multiple functions: it provides structural support, contains connection elements for attachment to the cladding element, and is received within the folded strap layers for retention. This multi-functionality reduces the need for additional separate components, simplifying manufacturing while ensuring secure retention.
Data Source
AI summary
A restraining strap device for retaining a cladding element in an interior of a motor vehicle when an airbag is triggered is provided. The restraining strap device connects the cladding element to a structural element of the motor vehicle, and comprises a strap and two insert parts that are arranged at the two opposite ends of the strap. End portions of the strap are folded around in a direction of the center of the strap such that an insert part is received between two layers of the strap. Recesses are provided in the two layers of the strap and the insert part. The recesses lie above one another such that in each case a connection element is guidable through the two layers of the strap and the insert part in order to connect the respective end of the restraining strap device to the cladding element or the structural element.