Vehicle Seat Rotary Catch Hook for Bidirectional Rotation
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Solution Overview
Problem
Existing rotating devices for vehicle seats do not allow for rotation in both directions when in the basic position, limiting their functionality and crash safety.
Innovation Solution
A rotating device with a catch hook that protrudes radially beyond the base component and seat part support, eliminating the need for a tangential stop, enabling bidirectional rotation and enhanced crash safety through a U-shaped catch hook design with a sliding element to prevent noise and a three-roller bearing system for even pressure distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tangential stop is provided to prevent over-rotation of the catch hook, then the device structure is completed, but the rotation is limited to one direction only
Solution Approach 1:
The catch hook is designed with an asymmetric geometry where the hook opening faces a specific direction. This asymmetric design allows the hook to engage with the base component in a way that permits rotation in both directions from the basic position without requiring a tangential stop, thereby resolving the contradiction between operational ease and device complexity
Solution Approach 2:
The single catch hook design serves multiple functions: it provides crash protection, enables bidirectional rotation, and eliminates the need for mirrored devices in different vehicle configurations. This universal design resolves the contradiction by making one device structure adaptable to multiple operational requirements
2Reliability
If catch bolts with recesses are used to prevent tearing apart in crash, then crash safety is improved, but the device cannot rotate in both directions from basic position
Solution Approach 1:
Instead of using a recess in the seat part support that strikes against a stop (conventional design), the invention inverts the approach by using a protruding catch hook that encompasses the base component. This inverted design allows the hook to engage securely for crash protection while permitting bidirectional rotation, resolving the contradiction between reliability and operational flexibility
3Adaptability or versatility
If a single directional rotary device is used, then the device structure is simplified, but it cannot be universally applied to both left-hand and right-hand drive vehicles
Solution Approach 1:
The catch hook design with its specific geometric orientation and encompassing structure creates a universal rotary device that can be applied to both left-hand and right-hand drive vehicles without requiring mirrored versions. This single design adapts to different vehicle configurations, resolving the contradiction between versatility and device complexity
Data Source
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AI summary
The invention relates to a rotational device (10) for a vehicle seat, comprising a base element (20) and a seat part support (30) which can be rotated about a rotational axis (S) with respect to the base element (20). Said rotational device (10) can be moved from a base position into a rotated position by rotating the seat part support (30) with respect to the base element (20). A catch hook (37) is provided on the base element (20) and/or on the seat part support (30), said catch hook protruding in the radial direction over the base element (20) and/or over the seat part support (30).