Airbag Tensioning Holder With Restrained Locking Member Release
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Solution Overview
Problem
Existing triggerable holding devices for airbag tensioning means lack control over the movement of the locking member after triggering, necessitating additional safety measures to prevent damage in test rigs.
Innovation Solution
A triggerable holding device with a locking member movably supported in a holder, coupled to a pyrotechnical device, and a restraining device that interacts with a restraining geometry to securely hold the locking member in the release position, preventing uncontrolled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the locking member is made movable and triggered by a pyrotechnical device, then the airbag deployment control function is improved, but the locking member moves uncontrolled after triggering causing safety hazards
Solution Approach 1:
A restraining device acts as an intermediary between the locking member and the holder. This restraining device includes a restraining geometry that guides and limits the movement of the locking member, ensuring it moves in a controlled manner from the locked position to the release position without detaching uncontrolled from the holder.
Solution Approach 2:
The restraining device extends in a direction transverse to the movement direction of the locking member, adding a dimensional constraint. This transverse extension provides lateral guidance and prevents the locking member from moving out of its intended path, solving the uncontrolled movement problem.
2Object-affected harmful factors
If additional safety measures are taken to retain the locking member on test rigs, then safety hazards are reduced, but device complexity and additional efforts increase
Solution Approach 1:
The holding device is designed to be self-contained with the restraining device and restraining geometry integrated into the structure. The locking member itself interacts with these features to automatically ensure controlled movement and retention, eliminating the need for separate external safety measures on test rigs.
3Object-affected harmful factors
If the restraining device extends laterally from the base, then the locking member movement is controlled without hindering assembly, but the base structure complexity increases
Solution Approach 1:
The restraining device is segmented from the base structure, extending laterally as a separate functional element. This segmentation allows the restraining geometry to be positioned optimally for controlling locking member movement without interfering with the assembly process, while keeping the base itself relatively simple.
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 device ensures the locking member remains securely in place after triggering, eliminating the need for additional safety measures in test rigs.
Implementation Method 1
a pyrotechnical device coupled to the locking member in such a way that it is shifted from the locking position to the release position upon activation of the pyrotechnical device
Data Source
AI summary
The invention relates to a triggerable holding device (10) for a tensioning means (12) of an airbag, comprising a holder (14), a locking member (16) that is movably supported in the holder (14) and that is shiftable between a locking position in which it keeps the tensioning means (12) locked and a release position in which the tensioning means (12) is released, a pyrotechnical device (22) which is coupled to the locking member (16) so that, when the pyrotechnical device (22) is activated, it is shifted from the locking position to the release position, and a restraining device (38) which is tightly connected to the locking member (16) and which, in the release position of the locking member (16), interacts with a restraining geometry (40) within the holder (14) to hold the locking member (16) in its release position within the holder (14).