Vehicle Seat Belt Guide Structure for High-Tension Position Stability
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Solution Overview
Problem
Existing vehicle seat belt guides experience significant downward displacement under high tension, leading to improper support of the seat belt due to deformation and loss of position.
Innovation Solution
A vehicle seat design featuring a belt guide with a transverse guide and side guides that distribute downward loads as compressive forces, reducing bending moments through a configuration of linear and curved portions fixed to a back frame, utilizing a single piece of steel material for structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional belt guide structure is used, then the structure is simple, but large downward displacement occurs under high tension
Solution Approach 1:
The belt guide is segmented into multiple functional portions: a transverse guide portion for guiding the seat belt, first and second side guide portions for load distribution, and first and second fixation portions for anchoring to the back frame. This segmentation allows each portion to perform its specific function optimally, with side guide portions transferring downward loads to the fixation portions, thereby preventing large downward displacements while maintaining structural reliability.
Solution Approach 2:
The side guide portions are configured with curved shapes that extend from the transverse guide toward the back frame. This curvature is designed to efficiently distribute downward loads applied to the transverse guide along the curved path to the fixation portions. The curved geometry optimizes load distribution and prevents stress concentration, enhancing the overall position stability of the belt guide under high tension conditions.
2Strength
If the transverse guide is directly fixed to the back frame, then the structure is simple, but bending moment increases causing deformation
Solution Approach 1:
The first and second side guide portions act as intermediary elements between the transverse guide and the fixation portions. These side guide portions receive downward loads from the transverse guide and transfer them to the fixation portions, effectively reducing the bending moment on the transverse guide. This intermediary structure prevents deformation while distributing stresses appropriately across the belt guide assembly.
Solution Approach 2:
The invention replaces a direct rigid mechanical connection (transverse guide directly fixed to back frame) with a load-distributing mechanical system involving curved side guide portions. This substitution transforms the load path from a direct bending scenario to a distributed compression and tension scenario, significantly reducing bending moments and preventing deformation under high tension conditions.
Data Source
AI summary
Provided is a vehicle seat in which a transverse guide of a belt guide is located on a seat front side and an upper side with respect to two fixation portions of the belt guide and in which two side guides each include a linear portion extending linearly from the transverse guide toward a back frame.