Vehicle Roof Guide Rail Latching Against Cover Detachment
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Solution Overview
Problem
Existing vehicle roof arrangements with movable covers face challenges in reliably securing the cover during high forces, such as those generated by airbag deployment, especially for larger covers, leading to potential detachment from the guide rail.
Innovation Solution
Incorporating a protrusion and clearance mechanism in the cover support and guide rail, where the protrusion engages with the clearance under high forces to provide additional latching, ensuring the cover remains secured to the guide rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover is coupled to the guide rail by means of a tilting mechanism, then the cover can be lifted and lowered and displaced along the longitudinal direction, but under high forces (e.g., during airbag deployment) the cover may be forced toward the outside and potentially detach from the guide rail
Solution Approach 1:
The protrusion and clearance are pre-positioned on the cover support and guide rail respectively, creating a preliminary safety mechanism that activates before complete detachment can occur. When high forces deflect the guide rail, the protrusion automatically engages the clearance to prevent the cover from detaching, thus applying counter-action in advance to offset the harmful effect of force-induced detachment
Solution Approach 2:
The protrusion and clearance are designed and positioned in advance during manufacturing, ready to engage when needed. The clearance is positioned on the guide rail at a location that anticipates the deflection direction under high forces, so that when the guide rail deflects, the protrusion is already in position to engage the clearance and prevent detachment
Data Source
AI summary
An arrangement for a vehicle roof having a roof opening has a guide rail which is elongate along a longitudinal direction, a cover having a cover support which is elongate along the longitudinal direction, the cover being displaceable relative to the guide rail and in a closed position being designed to close the roof opening, the cover support having a protrusion which protrudes along a transverse direction aligned transversely to the longitudinal direction, and the guide rail having a clearance, the protrusion and the clearance in the closed position being disposed so as to be mutually opposite along the transverse direction in such a way that the protrusion by means of a deflection along the transverse direction is able to be brought to engage with the clearance.