Rotating Belt Deflection for Vehicle Seat Restraint
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Solution Overview
Problem
Current belt arrangements in vehicles do not effectively enhance the restraining effect on occupants in various seating positions, particularly when the backrest is adjusted, as they fail to automatically adapt to changes in the backrest inclination and occupant size.
Innovation Solution
A belt arrangement featuring a holding device with a rotatable deflection element mounted on a pivot point, driven by a mechanism that adjusts based on the backrest inclination, ensuring the belt strap's course remains secure and optimized for different seating positions and occupant sizes, with the ability to be fixed in a predetermined orientation and adjusted vertically and longitudinally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backrest inclination is adjusted to improve comfort, then the seating comfort is improved, but the restraining effect of the belt arrangement deteriorates
Solution Approach 1:
The holding device is designed to be rotatable about a pivot point, allowing it to dynamically change its orientation and position in response to backrest inclination changes. This dynamic adjustment ensures the belt strap maintains an optimal restraining course regardless of the backrest angle, resolving the contradiction between comfort adjustment and restraint effectiveness.
Solution Approach 2:
The system incorporates sensors that detect the current inclination of the backrest and provide feedback to the drive mechanism. Based on this feedback, the drive automatically rotates the holding device to the appropriate position, ensuring the belt arrangement adapts to maintain proper restraint while the backrest is adjusted for comfort.
2Device complexity
If the belt arrangement is made fixed to simplify the structure, then the device complexity is reduced, but the adaptability to different seating positions deteriorates
Solution Approach 1:
Instead of a completely fixed structure, the holding device is given a single degree of freedom to rotate about a pivot point. This minimal dynamic element provides adaptability to different backrest inclinations while maintaining relatively simple construction, avoiding the need for complex multi-axis adjustment mechanisms.
Solution Approach 2:
The drive mechanism automatically adjusts the holding device position based on sensor feedback about backrest inclination, without requiring manual intervention from the occupant. The system self-regulates to maintain optimal restraint geometry, providing adaptability through automated control rather than complex mechanical linkages.
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a belt assembly (10) for a vehicle seat (2), comprising a belt strap (12) and at least one deflection element for the belt strap (12), which is arranged on a movably mounted holding device (20), and to a vehicle (1) having at least one vehicle seat (2) and one such belt assembly (10). According to the invention, the holding device (20) is mounted on a body element (4) for rotation about a pivot point (22), and a drive rotates the holding device (20) about the pivot point (22).